DE112013004163T5 - induction heating - Google Patents

Abstract

An induction heater according to this disclosure is constructed such that a plurality of heating coil units (2) located immediately under a cover plate (6) are pressed against the cover plate by biasing portions to control a vibration direction of the heating coil units in a predetermined direction. Light-emitting display units (3, 93) which radiate light visibly through the cover plate are arranged around the heating coil unit. The construction is such that a heating control section (22) recognizes a heating coil unit that inductively heats an object to be heated placed on the cover plate to at least some of the light emitting display units disposed around the identified heating coil unit to cause light to radiate to indicate a heating area.

Description

Technical part

This disclosure relates to an induction heater that inductively heats an object to be heated, such as a metal cooker disposed on a top plate, and more particularly to an induction heater having a multiple coil structure that directly underlies a plurality of heating coils the cover plate has.

State of the art

An induction cooker commonly used as an induction heater has, for example, one or two heating coils disposed immediately under a cover plate, and is constructed to be a metal cooking pot, etc., as an object to be heated, mounted on the Cover plate is turned off, heated by heating coils by induction.

In the induction heating cookers, a multi-coil construction is proposed which has a plurality of heating coils arranged immediately under the cover plate (see Patent Literature 1). The heating cooker proposed in Patent Literature 1 has a plurality of heating coils scattered under the cover plate, which are densely arranged, and having a construction so as to be able to heat by induction wherever the position of the heater Object to be heated, such as a saucepan, may be placed on the cover plate.

Further, in view of the multi-coil configuration for heating the cooking pot as the object to be heated by the plurality of heating coils, the stove in Patent Literature 2 is disclosed. The heater or cooker disclosed in Patent Literature 2 is configured to arrange heaters of comparatively small hexagonal structure to disperse all under the top plate and to cook by heating the saucepan, which is placed on the top plate, by the plurality of heating units , With respect to the heating unit in the heating cooker disclosed in Patent Literature 2, two types of heating units, a radiant heater and an induction heater are mixedly used, and an enlightenment segment is in the form of a honeycomb (hexagonal shape) along the periphery of each heating unit arranged.

quote list

patent literature

• Patent Literature 1: Spanish Unexamined Patent Publication No. 2366511 description
• Patent Literature 2: Japanese Unexamined Patent Publication No. 2008-527294
• Patent Literature 3: Japanese Patent Publication No. 4854596
• Patent Literature 4: Japanese Unexamined Patent Publication No. 2003-100430
• Patent Literature 5: Japanese Unexamined Patent Publication No. 2010-262884

Summary of the invention

Technical problem

As described above, the heater disclosed in Patent Literature 1 has the structure capable of induction heating the object to be heated, at which position of the cover plate the object is always turned off can, but has a problem in that the positions at which the heating coils are arranged, are not known to the user, the user can not be sure whether the object to be heated, such as a saucepan, which is placed on the cover plate, can be safely heated.

The heater disclosed in Patent Literature 2 is constructed so that when the saucepan is placed as the object to be heated on the cover plate, the lighting segments are started along the periphery of the heating units covered by the bottom of the cooking pot. Because only the lighting segments of the honeycomb heating units covered by the bottom of the cooking pot are started, however, the heating cooker disclosed in Patent Literature 2 is configured so that the user breaks the floor, a handle, a lid, etc The cooking pot can not simply detect the lighting segments started and has a problem regarding visibility. Therefore, the heater disclosed in Patent Literature 2 has a problem that the user can not easily recognize a heating area in a cooking operation, and the heater is not easy for the user to use.

As further described above, the stove disclosed in Patent Literature 1 has a structure capable of induction heating even if the object to be heated is located at some place on the surface Cover plate is turned off, wherein a plurality of heating coils arranged close together under the cover plate scattered are. The heater disclosed in Patent Literature 1 is constructed so that each of the plural heating coils is pressed from below by a spring against the rear and lower surfaces of the cover plate, respectively, and each heating coil is fixed by being pressed against the cover plate.

Therefore, at the time of assembling the conventional heating cooker constructed as above, it has been necessary to fix the plurality of heating coils at precisely predetermined positions with a desired spacing therebetween on the top plate, using the urging force of the spring and a complicated one very hard work was involved.

The conventional multi-coil heater has been constructed so that the heating coil is pressed against the top plate by the spring, and there has been a possibility that vibrations and shocks during transportation caused the dense arrangement of heating coils thereto swing (lateral swinging) and the adjacent heating coils could come into contact with each other. Because a plurality of control lines, such as signal lines from various sensors, are routed around the heating coils, it has been possible for an expanding and contracting operation of the spring, which at the time was caused by vibrations, to damage the control lines and, in some cases, cut through the control lines , which led to a problem with the reliability and security of the device.

Therefore, in the conventional multi-coil heater, a special mechanism must be provided to prevent the heating coil from swinging (swinging sideways) due to vibrations, impacts, etc., during transportation, and it has the big problem given the achievement of a smaller size and a smaller thickness of the device.

The object of this disclosure is to provide an induction heater that is easy to operate for a user, having a multi-coil design having a plurality of coils disposed below a top plate, and an induction heater to provide a heating area on the cover plate for the user clearly displayed, easy to use and has a high reliability.

The object of this disclosure is to provide an induction heater having a multi-coil construction which can be easily assembled by a simple method and, at the same time, can be prevented from causing the heating coils to oscillate (lateral swinging) itself when it comes to vibration, with a smaller size and a smaller thickness are achieved, and provides a high reliability and safety.

the solution of the problem

An induction heater according to the present disclosure comprises:
a cover plate on which an object to be heated is placed;
a plurality of heating coil units, which are disposed immediately under the cover plate and heating coils containing by induction, the object to be heated, which is placed on the cover plate or arranged to heat;
a light-emitting display unit disposed around each of the heating coil means for visibly radiating light through the cover plate;
an object to be heated detection section that detects the placement of the object to be heated above each of the heating coil units;
a heating control section that controls an operation state of each of the heating coil units and a state of irradiation of light from the light emitting display unit based on results of the detection by the object to be heated detection section; and
a resilient portion urging the heating coil unit against the rear and lower surfaces of the cover plate, respectively
the light emitting display unit comprises:
a light-emitting display case disposed within a space surrounded at least by the heating coil units arranged side by side;
a light emitting device as a light emitting source disposed inside the light emitting display case; and
a light-guiding unit disposed so as to connect the adjacent light-emitting display cases and having a top surface opposite to the cover plate and caused to radiate light by the light from the light-emitting device
the Heizspuleneinheiten are lined up in levels, vertical and horizontal rows or columns immediately under the cover plate, wherein
the heating control section is configured to identify by induction a heating coil unit for heating the object to be heated, which is placed on the cover plate, on the basis of the results of the detection by the detection section for the object to be heated, and at least some the light-emitting display units, which are arranged around the identified Heizspuleneinheit to cause light to radiate to indicate a heating area, and wherein
the outer surface of the light-guiding unit is disposed in contact with the heating coil unit, and configured to regulate the vibration direction of the heating coil unit by the biasing portion in a predetermined direction.

Advantageous Effects of the Invention

The induction heater according to this disclosure is constructed to be easy to use by clearly displaying a heating area on a top plate, and is also capable of having a multi-coil configuration that is easy to assemble by the simple method Heating coils can be prevented from oscillating (lateral swing or lateral swing), the smaller size and the smaller thickness are achieved and this has a higher reliability and safety.

Brief description of the illustrations

1 FIG. 10 is a plan view of an induction cooker from which a cover plate has been removed according to a first embodiment of the present disclosure. FIG.

2 Fig. 10 is a plan view of the cover plate in the induction cooker according to the first embodiment.

3 FIG. 15 is a perspective view of an enlarged heating coil unit and light emitting display unit arranged side by side in the induction heating cooker according to the first embodiment. FIG.

4 is a partial cross section taken along the line III-III in the in 1 shown induction cooker is applied.

5 is a part of a cross-sectional view taken along the line IV-IV in the induction cooker, which in 1 shown is created.

6 Fig. 10 is a block diagram of components forming a display function of the light emitting display unit in the induction heating cooker according to the first embodiment.

7 FIG. 12 is a plan view indicating a light-emitting state of the light emitting display unit when objects to be heated are placed on the cover plate according to the induction cooker according to the first embodiment.

8th FIG. 12 is a plan view of a plurality of heating coil units and light emitting display units, etc., which are disposed immediately under a cover plate in an induction heating cooker according to a second embodiment according to the present disclosure.

9 is a plan view of the cover plate of the induction heating cooker according to the second embodiment.

10 FIG. 15 is a perspective view of an enlargement of the heating coil units and the light-emitting display units arranged side by side in the induction heating cooker according to the second embodiment. FIG.

11 is a partial cross-sectional view along the line IX-IX in the in the 8th shown induction cooker.

12 is a partial cross-sectional view along the line XX in the in 8th shown induction cooker.

13 FIG. 15 is a perspective view of a photoconductive unit in the induction heating cooker according to the second embodiment. FIG.

14 FIG. 11 is a plan view showing a light emission state of the light emitting display unit when objects to be heated are placed on the cover plate in the induction heating cooker according to the second embodiment.

15 FIG. 10 is a plan view of an induction cooker from which a cover plate has been removed, according to a third embodiment of the present disclosure. FIG.

16 Fig. 10 is a plan view following a construction of main portions in the induction heating cooker 15 demonstrate.

17 Figure 12 is a schematic cross-sectional view of a cross-sectional structure of the induction cooker as viewed from an AA direction 15 you can see.

18 FIG. 12 is a block diagram of a configuration of the induction heating cooker. FIG 15 ,

19 FIG. 10 is a flowchart of an operation method for the induction heating cooker according to the third embodiment according to the present disclosure. FIG.

20 FIG. 10 is a flowchart of an operation method of the induction heating cooker according to a modification example according to the third embodiment. FIG.

21 13 is a partial cross-sectional view of a configuration of a proximity sensor and an operating portion of an induction heating cooker according to a fourth embodiment according to the present disclosure.

22 FIG. 10 is an overall plan view of an induction heating cooker according to a fifth embodiment according to the present disclosure. FIG.

23 FIG. 15 is a cross-sectional view of a construction of a main part of an induction heater according to a sixth embodiment according to the present disclosure. FIG.

24 FIG. 10 is a cross-sectional view of main parts of the induction heater according to the sixth embodiment. FIG.

25 FIG. 15 is a perspective view of main portions in the induction heater according to the sixth embodiment. FIG.

26 FIG. 15 is a perspective view of the induction heater according to the sixth embodiment. FIG.

27 FIG. 12 is a perspective view of the induction heater according to the sixth embodiment with a cover plate removed. FIG.

28 Fig. 10 is a plan cross-sectional view of the induction heater according to the sixth embodiment, from which the heating coil units have been removed.

29 FIG. 12 is a block diagram of controls in the induction heater according to the sixth embodiment. FIG.

Description of the embodiments

An induction heater according to a first aspect of the present disclosure comprises:
a cover plate on which an object to be heated is placed;
a plurality of heating coil units, which are disposed immediately under the cover plate and containing heating coils, which heat the object to be heated, which is placed on the cover plate, with induction;
a light-emitting display unit disposed around each of the heating coil units for emitting light visible through the cover plate;
an object-to-be-heated detecting section which detects the location of the object to be heated above the heating coil units;
a heating control section that controls an operating state of each of the heating coil units and a light emitting state of the light emitting display based on the detection by the object to be heated detection section; and
a biasing portion which urges the heating coil unit against the back and bottom of the cover plate, respectively
the light emitting display unit comprises:
a light emitting display case disposed within a space surrounded at least by the heating coil units arranged side by side;
a light emitting device as a light emitting source disposed inside the light emitting display case; and
a light guide unit arranged to connect the adjacent light emitting display housings, and which light guide unit has a top surface opposite to the cover plate, which is caused to radiate light from the light emitting device by means of the light
the Heizspuleneinheiten are arranged in planar, vertical and horizontal rows, or in horizontal horizontal rows and columns, directly under the cover plate or strung, wherein
the heating control section is configured to detect a heating coil unit that inductively heats the object to be heated placed on the cover plate, based on the results of the detection by the object to be heated detecting section, and at least causing some of the light-emitting display units arranged around the detected heating coil unit to radiate to display a heating surface and a heating area, respectively, and wherein
the outer surface of the light guiding unit is disposed in contact with the heating coil unit, and configured to regulate the vibration direction of the heating coil unit by the biasing portion in a predetermined direction. The thus-constructed induction heater according to the first aspect becomes an easy-to-use, highly reliable heater whose heating area is clearly displayed on the cover plate with its entire heating area continuously through the object to be heated, and its heating area at the time of heating operation can be recognized or confirmed. Even if a vibration state occurs, for example, during transportation, the heating coil unit (lateral vibrations) does not vibrate, regulated to the vibration or Vibration in a predetermined direction, wherein the induction heater is constructed according to the first aspect to be able to prevent the heating coil from swinging (lateral vibrations) to achieve a smaller size and a smaller thickness, and a high To get reliability and safety for a heater. The induction heater of the first aspect becomes an easy-to-use heater that is capable of easily and clearly recognizing the heating area, and is configured to be able to effectively utilize a space around the heating coil unit ,

An induction heater according to a second aspect of the present disclosure may be constructed such that the light-emitting display units according to the first aspect do not radiate in a dotted state around the heating coil unit, and a region surrounded by the dotted light emission from the light-emitting display units as the heating area is treated. Since the heating area is indicated by several pieces of the dot-like light emission on the cover plate, the induction heater thus constructed becomes, according to the second aspect, an easy-to-use heater in which the heating area is easily recognizable by the user, even if the point-like light radiation from some light-emitting display units the object to be heated is interrupted.

An induction heater according to a third aspect of the present disclosure may be constructed so that the heating control portion according to the second aspect is constructed so that when the object to be heated is placed on the cover plate, the light emitting display unit emits light to at least indicate the heating area indicate the position of the apex or the tip of a rectangular or square frame body. The thus configured induction heater according to the third aspect becomes an easy-to-use heater in which the user can easily open the square without interruption by the object to be heated, for example, a handle, a lid, etc. from a generally cylindrical saucepan, etc. or rectangular heating area can detect (point-like light emission of four light-emitting display units).

An induction heater according to a fourth aspect of the present disclosure may be configured such that each of the light emitting display units according to the third aspect further comprises:
A membrane plate or membrane sheet disposed on the upper surface opposite to the cover plate in the light emitting display case, and having a light emitting area that shines in the dotted state irradiated by the light from the light-emitting device after it has been reflected by the wall surface within the light-emitting display housing. The thus constructed induction heater according to the fourth aspect becomes an easy-to-use heater in which the user can easily and clearly recognize the heating area because on the upper sheet the heating area emits light at the location of the vertex a substantially rectangular frame body, over the entire light-emitting area of the membrane plate, with no interruption by the object to be heated, such as the handle, the lid, etc., of the generally cylindrical saucepan, etc.

An induction heater according to a fifth aspect of the present disclosure may be configured such that the light emitting display units according to the first aspect are configured to radiate light in a linear state around the heating coil unit. The thus-constructed induction heater of the fifth aspect becomes an easy-to-use heating apparatus in which, since on the cover plate the entire heating area is displayed as a linear frame body by emitting light, the user can easily recognize the heating area even if a part of the linear light emission is interrupted by the display unit for emitting light through the object to be heated.

An induction heater according to a sixth aspect is constructed such that the heating control portion according to the fifth aspect can be constructed so that when the object to be heated is placed on the cover plate, the light emitting display units emit light to project the heating area at least at the Display a rectangular or square frame body. The thus configured induction heater according to the sixth aspect becomes an easy-to-use heater in which the user, because the heating area in a substantially square frame body on the cover plate radiates light unimpaired by the object to be heated, for example, the handle Lid, etc., of the saucepan, etc., can easily recognize the square or rectangular heating area.

An induction heater according to a seventh aspect according to the present disclosure may be configured such that the heating control portion of any one of the first to sixth aspects is constructed so as to control the light-emitting state of the light-emitting display unit to display the heated area depending on the temperature of the object to be heated, which is placed on the cover plate. The thus configured induction heating apparatus according to the seventh aspect is constructed to allow the user to easily and securely recognize the state of the heating area on which the object to be heated is placed, as well as to allow the user to easily recognize a heating state of the heating area.

An induction heater according to an eighth aspect of the present invention may be constructed as in the first aspect to have a sliding guide portion disposed around the heating coil unit and has a sliding guide surface in contact with the heating coil unit to move a direction of vibration of the heating coil unit through the heating coil unit To regulate the spring portion in a predetermined direction. The thus configured induction heater according to the eighth aspect is capable of being easily assembled as well as preventing the heating coil from vibrating (lateral swinging) even in the case of vibration, with a smaller size and a smaller thickness be achieved and this has a high reliability and safety.

An induction heater according to a ninth aspect according to the present disclosure may be constructed such that the sliding guide surface of the sliding guide portion according to the eighth aspect is disposed in contact with the outer peripheral surface of the heating coil unit, and is configured to move the vibration direction of the heating coil unit in the same direction as that the pressure or pressure against the cover plate by the Vorsavorungs- or spring section to regulate or steer.

The thus configured induction heater according to the ninth aspect can surely prevent the heating coil from vibrating (lateral vibration) even in the case of vibration, and has high reliability and safety.

An induction heater according to a tenth aspect according to the present disclosure may be configured so that the sliding guide portion according to the ninth aspect is formed on each of the light emitting display units. The thus-constructed induction heating apparatus according to the tenth aspect becomes a heater designed to surely make the heating area on the cover plate visible, and is capable of efficiently setting the space inside the apparatus by the sliding guide portion in FIG the light emitting display unit is disposed, the heating coil is prevented from swinging (lateral swing), a small size and a small thickness can be achieved, and high reliability and safety are available.

An induction heater according to the eleventh aspect of the present disclosure may be constructed such that the light emitting display unit according to the tenth aspect is configured to radiate light in the dotted state around the heating coil unit and the area surrounded by the light is emitted from the light-emitting display unit is treated as the heated area. The thus-constructed induction heater according to the eleventh aspect becomes a heater that is easy to use and highly reliable because the heating area is indicated by a plurality of spot-like light radiations on the ceiling plate.

An induction heater according to a twelfth aspect according to the present disclosure may be constructed such that each light emitting display unit according to the eleventh aspect further comprises:
a membrane sheet disposed on the top surface opposite to the top plate in the light-emitting display case, and having a light-emitting portion that shines in the dotted state irradiated by the light from the light-emitting device after passing through the light-emitting device Wall surface is reflected within the light emitting display housing, wherein the sliding guide portion with the surface in contact or in contact with the Heizspuleneinheit in the light emitting display housing, which is constructed as the Gleitführungsfläche. The thus configured induction heater according to the twelfth aspect becomes a heater constructed integrally with the light-emitting display unit which displays the heating area on the cover plate by the emitted light from the entire light-emitting area of the membrane sheet or membrane plate achieved smaller size and the smaller thickness of the device or the device and which has a high reliability and safety.

An induction heater according to a thirteenth aspect according to the present disclosure may be constructed such that the The sliding guide portion according to the twelfth aspect has a shape of a plurality of fins extending in the direction of the heating coil unit, wherein ends of the rib-like extension serve as the sliding guide surface, and the sliding guide portion is extended in the same direction as that of the pressure against the cover plate by the bias portion in the light emitting display case. The thus-constructed induction heater according to the thirteenth aspect becomes a heater which can surely prevent the heating coil from swinging (lateral swinging) even in the case of vibration, and has high reliability and safety. The induction heater according to the thirteenth aspect is constructed such that the heating coil unit can easily vibrate up and down because the sliding guide surface is narrow, and the friction between the heating coil unit and the sliding guide surface is small.

An induction heater according to a fourteenth aspect according to the present disclosure may be constructed such that the light emitting display unit according to the tenth aspect is constructed to radiate light in a linear state around the heating coil unit, and wherein the area is surrounded by the radiated light from the light-emitting display unit when the heated area is treated. The thus configured induction heater according to the fourteenth aspect is easy to use with the heating surface indicated by the linear light emission on the cover plate to a heater whose heating range is easy to understand by the user, and has high reliability.

An induction heater according to a fifth aspect of the present disclosure may be configured such that the sliding guide portion according to the fourteenth aspect has a surface that is in contact with the heating coil unit in the light guide unit configured as the sliding guide surface. The thus-constructed induction heater according to the fifteenth aspect becomes a heater which achieves the smaller size and the smaller thickness of the device and has higher reliability and safety, which is integrally constructed with the light-emitting display unit which controls the heating area on the Cover plate indicates. The induction heater according to the fifteenth aspect is constructed so as to be capable of suppressing heat transfer by convection and radiation and to achieve a great suppression of heat loss, because the light emitting display unit, in particular, the light guide unit in the gap between the heating coil units is positioned.

An induction heater according to a sixteenth aspect according to the present disclosure may be constructed such that the sliding guide portion according to the fifteenth aspect has a function as a light-shielding body to shield the light from the light guide unit
the contact surface with the heating coil unit in the sliding guide portion serves as the sliding guide surface, and wherein
the sliding guide portion is extended in the same direction as the pressure against the cover plate by the bias portion. The thus constructed induction heater according to the sixteenth aspect becomes a heater which can surely prevent the heating coil from swinging (lateral swinging), the sliding guide portion using a device which is also used by the light emitting display unit, and which has high reliability and reliability Safety has. The induction heater is constructed so as to be able to securely keep the heating coil unit from vibration (lateral vibration) even when the heating coil unit is largely displaced downward because the sliding guide portion is extended in an opposite direction relative to the cover plate.

An induction heater according to a seventeenth aspect according to the present disclosure further comprises, in the construction according to the first aspect:
an operation display section disposed under the cover plate; and
a proximity sensor that detects the proximity of an object to the operation display section, wherein
the heating amount of the heating coil unit can be controlled when the proximity sensor detects the proximity of the object to the operation display section. In the induction heating apparatus constructed as above, the heating coil decreases a heating amount or stops heating when the proximity sensor detects a placement of a cooking utensil such as a pot on the cover plate in the vicinity of the operation display portion. As a result, the temperature rise and breakage of the operation display portion can be suppressed when heated by the cooking utensil such as the pot.

An induction heater according to an eighteenth aspect according to the present disclosure may be constructed such that in the construction of the seventeenth aspect Operating display section is constructed to also serve as the proximity sensor.

An induction heater according to a nineteenth aspect according to the present disclosure may be constructed such that the structure according to the seventeenth aspect of the proximity sensor is integrated in the operation display portion.

An induction heater according to a twentieth aspect according to the present disclosure may be constructed such that in the construction according to the seventeenth aspect, the vernier sensor is disposed in the region between the operation display portion and the adjacent heating coils.

An induction heater according to a twenty-first aspect according to the present disclosure may be constructed to display, in the construction of the seventeenth aspect, when the proximity sensor detects the vicinity of the object to the operation display section, the vicinity of the object on the operation display section.

An induction heater according to a twenty-second aspect according to the present disclosure may be constructed so that in the construction of the seventeenth aspect, the touch sensor includes the touch panel disposed near the bottom of the cover plate.

An induction heater according to a twenty-third aspect of the present disclosure may be constructed such that in the construction of the seventeenth aspect, the proximity sensor is an electrostatic electrode disposed on the underside of the cover plate.

An induction heater according to a twenty-fourth aspect according to the present disclosure may be constructed such that in the construction according to the seventeenth aspect, the vernier sensor includes an electrostatic electrode printed on the underside of the cover plate.

An induction heater according to a twenty-fifth aspect according to the present disclosure may be constructed such that in the construction according to the seventeenth aspect, the proximity sensor is an infrared sensor that detects the proximity of a heated object.

An induction heater according to a twenty-sixth aspect according to the present disclosure may be constructed such that in the construction according to the seventeenth aspect, the vernier sensor is a temperature sensor.

An induction heater according to a twenty-seventh aspect according to the present disclosure may be constructed such that in the construction of the twenty-sixth aspect, when the temperature sensor detects a temperature exceeding a threshold temperature permissible for the operation display portion, the heating amount of the heating coil is controlled.

An induction heater according to a twenty-eighth aspect according to the present disclosure may be constructed such that in the construction according to the seventeenth aspect, the vernier sensor is a piezoelectric element that detects a pressure or deformation by the object placed on the cover plate.

An induction heater according to a twenty-ninth aspect according to the present disclosure may be constructed such that, in the seventeenth aspect construction, when the proximity sensor detects the vicinity of the object while heating the heating coil adjacent to the operation display section, the heating amount of the adjacent heating coils is controlled ,

An induction heater according to a thirteenth aspect according to the present disclosure, having the structure of the seventeenth aspect, may further comprise:
a cooling device that cools the operation display portion, wherein
when the proximity sensor detects the proximity of the object, the cooling capability of the cooling device is increased. Because the above configuration causes the operation display section to be even more cooled, the temperature rise and the breakage of the operation display section when heated by the cooking utensil such as a pot can be suppressed.

An induction heater according to a thirty-first aspect according to the present disclosure may be constructed such that in the thirtieth-aspect construction, when the proximity sensor detects the vicinity of the object while heating the heating coil adjacent to the operation display section, the cooling capability of the cooling device is increased ,

An induction heater according to a thirty-second aspect according to The present disclosure may be constructed such that, in the thirtieth aspect design, when the vernier sensor is a temperature sensor, and the temperature sensor detects a temperature higher than a threshold temperature allowed for the operation display section, the cooling capability the cooling device is increased.

An induction heater according to a thirty-third aspect according to the present disclosure may be constructed such that, in the construction according to the seventeenth aspect, the operation display portion is formed by overlapping an operation portion via a liquid crystal display portion. According to the above configuration, because the operation section and the liquid crystal display section are integrated as one body, the operation and display at the same time are visible, easy to understand and easy to use.

An induction heater according to a thirty-fourth aspect according to the present disclosure may be constructed such that in the construction according to the thirty-third aspect, the operation portion includes a touch panel disposed above the liquid crystal display portion.

An induction heater according to a thirty-fifth aspect according to the present disclosure may be constructed such that in the construction according to the thirty-third aspect, the operation display portion is an electrostatic electrode disposed on the underside of the cover plate.

An induction heater according to a thirty-sixth aspect according to the present disclosure may be configured such that in the structure according to the thirty-third aspect, the operation portion includes an electrostatic electrode printed on the underside of the cover plate. By the above construction, the operation section and the proximity sensor can be easily constructed. The electrostatic electrode is made of metal, and therefore the heat resistance is excellent.

An induction heater according to a thirty-seventh aspect according to the present disclosure may be constructed such that, in the structure according to the seventeenth aspect, when the vernier sensor has continuously detected the proximity of the object to the operation display section for a predetermined period, the proximity of approaching Object is displayed on the operation display section.

An induction heater according to a thirty-eighth aspect according to the present disclosure may be constructed such that in the structure of the seventeenth aspect, the heating coil includes a plurality of heating coils.

An induction heater according to a thirty-ninth aspect according to the present disclosure may be constructed based on the construction of the first aspect so as to have:
a base on which the heating coil unit is mounted by means of the bias portion; and
a cooling device that generates a cooling air, wherein
the biasing portion has a first seat coil held between the heating coil unit and a non-electrically conductive mounting portion and having a second winding seat disposed to the base and constructed to support the heating coil unit against the heater coil unit To push cover plate as well as to dissipate or distribute the heat of the heating coil unit by the cooling air from the cooling device.

In the induction heater constructed as described above, the magnetic flux generated by the heating coil and in particular the magnetic flux at the lower side of the heating coil can be largely canceled out by ferrite, but a certain amount of leakage of the magnetic flux is unavoidable. However, because the bias portion, for example, a compression coil spring is linear and is not looped (ring-shaped), the magnetic flux leaking forth can not generate eddy current in the compression coil spring and the compression coil spring can not heat itself.

On the other hand, in the bias coil spring, a first seat coil is held between the bottom of the heating coil unit and a mounting portion such that the wire surface of the first seat coil will make surface contact, and a heat transfer area is ensured. For this reason, the bias coil spring (compression coil spring) functions as a heat dissipating fin to disperse the heat by means of the first seat coil, which is generated by the loss of the heating coil unit.

Since the cooling air from the cooling device, the lower surface or the lower side of the Heizspuleneinheit and the biasing or spring section ( Compression coil spring), a temperature rise of the heating coil unit can be suppressed. As a result, the induction heater does not require such measures as the control to suppress an input to the heating coil unit, or the control for increasing the volume of the supplied air to prevent an abnormal increase in the temperature, and thus becomes an easily usable induction heater.

Since the bias coil spring presses the heating coil unit against the cover plate, no space or gap is caused between the heating coil unit and the object to be heated. Therefore, it is not necessary to set an additional magnetic flux taking into account such a space or gap in the heating coil unit, and the heating unit can be made compact.

An induction heater according to a fortieth aspect according to the present disclosure may be constructed such that in the structure of the thirty-ninth aspect, a thermally conductive material is filled between the bottom of the heating coil unit and the mounting portion holding the first seat coil. With such a construction, the first seat coil is thermally and securely coupled to the lower surface of the heating coil unit and the mounting portion, and the heat is more easily transferred from the heating coil unit to the first seat coil. As a result, the heat generated by the loss of the heat coil unit is efficiently conducted to the first seat coil of the bias coil spring (compression coil spring).

The bias coil spring sufficiently functions as a heat distribution rib. Since the cooling air from the cooling device cools the underside of the heating coil unit and the compression coil spring, the temperature rise of the heating coil unit can be suppressed.

An induction heater according to a forty-first aspect according to the present disclosure may be configured such that, in the construction according to the thirty-ninth and fortieth aspects, the light-emitting display unit is constructed as a guide body for the cooling air by keeping within a space surrounded by the heating coil units light-emitting display unit is arranged so as to narrow the space or reduce. With such a construction, the cooling air from the cooling device, after being incident on the light-emitting display unit as a guide body, flows along a side wall surface of the light-emitting display unit, and then flows toward the center of the underside of the heating coil unit.

The cooling air from the cooling device thus securely cools the underside of the heating coil unit and the biasing coil spring and can be prevented from uselessly flowing into the space surrounded by the plurality of heating coil units. Since the cooling air cools the lower surface of the heating coil unit and the biasing portion (compression coil spring), downsizing of the cooling device can be achieved.

An induction heater according to a forty-second aspect according to the present disclosure may be constructed such that in the structure according to the thirty-ninth aspect, the mounting portion is a planar portion and is constructed to make surface contact with the underside of the heating coil unit. With such a construction, since the surface contact between the underside of the heating coil unit and the planar surface of the mounting portion occurs, and a heat transfer surface is newly formed therewith, the spring coil (compression coil spring) can absorb the heat generated by the Loss of the Heizspuleneinheit is generated by the flat surface of the mounting portion as well as by the first seat binding and dissipate the heat sufficient.

Because the cooling air from the cooling device cools the lower surface of the heating coil unit and the biasing portion (compression coil spring), the temperature rise of the heating coil unit can be suppressed.

An embodiment of the induction heater according to the present disclosure will now be described in detail, with appropriate reference to the illustration. For example, a detailed description of the already well-known facts and an overlapping description of substantially identical constructions may be omitted. This is done for the purpose of avoiding unnecessary redundancy of the following description and to ensure ease of understanding for the skilled person.

The inventor makes available the accompanying drawings and the following description for a sufficient understanding of this disclosure by those skilled in the art and is not intended to be that defined by the scope of the claims To restrict objects by these representations and the description.

A description will be given of the induction heater in the induction heater according to the following embodiments, but the constructions thereof are exemplary, and the present invention is not limited to the constructions described in the following embodiments and includes the induction heater having technological features according to this disclosure. The present invention includes a suitable combination of arbitrary constructions described in each embodiment in the following description and has individual effects with respect to the combined designs.

((First embodiment))

The 1 FIG. 10 is a plan view of the induction heating cooker as the induction heater according to a first embodiment according to this disclosure, with its cover plate on which the object to be heated is placed, such as the saucepan, removed. FIG. As in 1 As shown in the induction cooker according to the first embodiment, various portions are of a multi-coil structure including a plurality of heating coil units 2 , light-emitting display units 3 , etc., contained, just below the cover plate, which has an upper opening of a main body housing 1 covered, arranged.

As in 1 are shown inside the main body housing 1 the heating coil units 2 Side by side in planar, horizontal and vertical rows or arranged in a horizontal plane in rows and columns, and in the example of the induction heating cooker according to the first embodiment, five pieces in the vertical row and nine pieces in the horizontal row side by side arranged horizontally in rows and columns, with forty-five heating coil units 2 are arranged. Therefore, the area of the cover plate becomes immediately over the area in which a plurality of heating coil units 2 Arranged side by side to a heatable area and even if several objects to be heated are turned off within the heatable area, induction heating is possible.

In the cover plate, in the area other than the heatable area in which the heating coil units are located 2 are disposed, belongs, an operation display section 5 and the induction heating cooker according to the first embodiment becomes the operation display section 5 arranged in the area of the center on the front side as the user side. The operation display section 5 is formed by disposing a touch panel over a liquid crystal display portion, and is constructed such that when the induction cooker is started, operation buttons are provided within the operation display portion 5 are displayed and at the same time operating contents and action contents are displayed by light emission.

2 is a plan view of a cover plate 6 in the induction cooker according to the first embodiment. 3 FIG. 15 is a perspective view of an enlargement of the heating coil unit. FIG 2 and the light-emitting display unit 3 , which are arranged side by side in the induction cooker according to the first embodiment, and shows the situation immediately below the heatable area under the cover plate. The 4 is a partial cross-sectional view taken along the line IV-IV in the induction cooker, the in 1 is shown, is created, and 5 FIG. 14 is a partial cross-sectional view taken along line VV in the induction cooker shown in FIG 1 shown is created.

The 4 and 5 show by a cross section the construction of the heating coil unit 2 and the light-emitting display units 3 which are arranged on both sides of it.

The cover plate 6 For example, in the induction cooker according to the first embodiment, transparent crystallized glass is used and a black colored film or layer 16 is printed on the surface of the heating coil units 2 (Back side of the cover plate 6 ). This colored layer 16 is of a double structure of a black translucent film 16a which transmits light and a black light-shielding layer 16b that shields light. On the back of the cover plate 6 is the translucent layer 16a printed over the entire surface, except for the operation display section 5 and above that is the light-shielding layer 16b printed on a predetermined area, for example, the predetermined area except the area containing the operation display section 5 , the light emitting display unit 3 and an optical sensor 15 which is later described opposite. That's why the cover plate is 6 designed so that from outside the user the components of the heating coil unit 2 , etc., within the main body case 1 through the cover plate 6 can not see. Between the colored layer 16 and the heating coil unit 2 becomes, for example, a heat-insulating material 17 , For example, a mica material arranged for the purpose of the heat from the heating coil unit 2 to isolate. On the back of the cover plate 6 is while the heat insulating material 17 is arranged on the surface of the heating coil unit 2 opposite, is the heat-insulating material 17 Not arranged on the surface of the light-emitting display unit 3 or the rear surface of the central portion of the heating coil unit 2 opposite. The induction cooker according to the first embodiment is constructed such that the heat insulating material 17 at each heating coil unit 2 is fixed and at the time of assembly, each Heizspuleneinheit 2 and any thermally insulating material 17 integrated into a body or assembled in one piece and are inside the main body housing 1 built-in.

(Construction of the heating coil unit)

Each heating coil unit 2 in the induction heating cooker according to the first embodiment has for heating the object to be heated, such as a saucepan, on the top plate 6 is arranged next to a heating coil 13 for generating an induction magnetic field, a ferrite (not shown) as a magnetism collecting material and a mica plate (not shown) as a heat insulating material, and a part of the heating coil 13 , the ferite and the mica plate are inside a heating coil housing 14 contain. The preload portion as an excitation means, for example, a compression coil spring 11 , is between the back surface of the Heizspulengehäuses 14 and the main body portion 19 arranged, and the Heizspulengehäuse 14 is designed to be constant against the cover plate 6 by the pressure force of the compression coil spring 11 to be pressed. As a result, the surface of the heating coil 13 (Surface on the cover plate side) in a consistently secure tight or tight contact with the cover plate 6 by means of the thermal insulation material 17 and the colored layer 16 ,

As in 5 shown is each heating coil unit 2 with the optical sensor 15 provided and is designed to measure the temperature of the object to be heated, that on the cover plate 6 above the heating coil unit 2 turned off to detect. The optical sensor 15 which uses infrared rays from the object to be heated via a temperature detecting portion is at a holding portion 20 attached to the optical sensor having a detection window at an opening at the center of the heating coil 13 is located, and is just below the center of the heating coil 13 arranged. Consequently, the cover plate 6 that is the central section of the heating coil 13 is opposite, with the light-transmitting film or the light-transmitting layer 16a equipped and will not with the heat-insulating material 17 provided, and therefore the Heizspuleneinheit 2 designed to match the temperature of the object to be heated, that on the cover plate 6 turned off to capture with high accuracy.

(Construction of the light-emitting display unit)

The light-emitting display unit 3 is in four places around each heating coil unit 2 arranged and is designed to radiate light in a substantially point-like state to pass through the cover plate 1 to be visible. The light-emitting display unit 3 is disposed within a space passing through the heating coil units 2 is arranged side by side in the vertical and horizontal horizontal rows and in a horizontal plane in rows and columns, and is in contact with an outer peripheral surface of the Heizspulengehäuses 14 in the heating coil unit 2 to be. The light-emitting display unit 3 is positioned on the apex of a grid frame body of a rectangle as a substantially square, which is constructed around the heating coil units 2 to be arranged side by side in the vertical and horizontal rows and in the horizontally arranged rows and columns, respectively.

In the induction heater according to the first embodiment, an open space becomes in the area formed by, for example, four heating coil units 2 is surrounded, formed because the Heizspuleneinheit 2 is substantially circular, as can be seen in the plan view, and these Heizspuleneinheiten 2 are arranged to be distributed side by side in the plane in the horizontal rows and columns. The induction heater according to the first embodiment includes the light emitting display unit 3 located at the open area between the heating coil units 2 is formed, and therefore, the induction heater according to the first embodiment efficiently uses the space inside the device and has an essential construction for achieving a smaller size and a smaller thickness.

The light-emitting display unit 3 has a light-emitting device 8th as a light-emitting source, for example LED, a light-emitting display housing 9 that the light-emitting device 8th contains and has an inner wall surface to reflect the light emitted by the light-emitting device 8th is emitted, and a membrane plate 12 on, which has a cross-shaped opening section 10 as a cruciform opening on the surface has that of the cover plate 6 in the light-emitting display housing 9 opposite. The membrane plate 12 is made of a milky white translucent material and the membrane plate 12 has a laminated body printed thereon around the cross-shaped opening portion 10 train. The light-emitting device 8th is inside the light-emitting display housing 9 arranged so as to clear the light coming from the light-emitting device 8th is emitted, not directly on the cross-shaped opening portion 10 radiate. The light-emitting display unit 3 is constructed so that the light from the light emitting device 8th the cross-shaped opening portion 10 namely, illuminated, after this from the inner wall surface of the light-emitting display housing 9 has been reflected. By such a construction, it is constructed so that when the light-emitting device 8th Light radiates, the light in the cruciform shape with the substantially dot-like glow after passing through the cross-shaped opening portion 10 the membrane plate 12 is through and the light becomes a uniform light over the cover plate 6 and the cruciform opening portion 10 will not radiate uneven light. As a result, the induction heating cooker according to the first embodiment becomes a heater which enables the heating area through the cover plate 6 to recognize it safely and thus he has a high visibility or visibility, since the light-emitting display unit 3 in the light-emitting state is designed to display the heating area by plural pieces of the dot-like light emission. In this disclosure, the light emission in the dot-like state includes the light emission, and may be visually recognized as being substantially pointwise by the light from the cross-shaped opening as described above, and the shape of the light-emitting aperture is not limited to the cross shape but includes various shapes that are capable of emitting light in a substantially point-shaped pattern, such as a circle, a triangle, a square.

As in 4 1, the induction heating cooker according to the first embodiment is constructed such that, because the light emitting device 8th is arranged to light up in the direction of the cover plate 6 to radiate, but not immediately below the cross-shaped opening portion 10 is arranged, the light from the light-emitting device 8th the cross-shaped opening portion 10 after lighting through the back of the membrane plate 12 has been reflected, unlike at least the cross-shaped opening portion 10 and the inner wall surface of the light-emitting display case 9 , The membrane plate 12 and the light-emitting display housing 9 For example, they are made of a white resin material and are designed to have a surface capable of absorbing the light from the light-emitting device 8th to reflect. Four light-emitting devices 8th are inside the light-emitting display housing 9 are arranged, are equally spaced from each other and are arranged at an equal distance from the membrane plate 12 to have.

(Construction of the sliding guide section)

As in 5 is shown, the light-emitting display unit 3 with a Gleitführungsteil 4 equipped at the location of the heating coil unit 2 opposite. The sliding guide section 4 is arranged to be able to the outer peripheral surface of the Heizspulengehäuses 14 in the heating coil unit 2 to slide. At the time of transportation, etc., of the induction heating cooker, the sliding guide section controls 4 the vibration direction of each heating coil unit 2 up and down in one direction and securely prevents movement due to malfunction such as contact or collision of each of the heating coil units 2 caused by vibration (lateral swing) even when the heating coil unit 2 in a vibrating state by the compression coil spring 11 is offset. The direction up and down means the direction orthogonal to the plane of the cover plate 6 , immediately above, against which the heating coil unit 2 is pressed.

In the induction cooker according to the first embodiment, the sliding guide portion is 4 provided in a rib shape, wherein the longitudinal direction is the vertical direction, and is constructed to have three extensions extending in the direction up and down or vertically. Therefore, the sliding surface of the sliding guide portion 4 and the outer peripheral surface of the Heizspulengehäuses 14 from a linear state extending far in the direction of up and down (vibration direction) and vertically, and the structure having three ribs of the sliding guide portion 4 is formed to conform to a curved surface of the outer peripheral surface of the Heizspulengehäuses 14 adapt.

As described above, the sliding guide section has 4 in the induction heater according to the first embodiment, a mold having a plurality of ribs extending in the direction of the heating coil unit 2 extend and the ends of these rib-shaped continuators work as a Gleitführunugsfläche with the outer peripheral surface of the Heizspulengehäuses. The rib-shaped sliding guide section 4 formed on the outer surface of the light-emitting display case extends in the same direction as the direction of the pressure against the cover plate 6 through the compression coil spring 11 as the preload section. Since the thus formed Gleitführungsabschnitt 4 on the light-emitting display unit 3 is arranged, the induction heater according to the first embodiment can safely prevent the heating coil from vibrations (lateral vibrations) even in the case of vibration and has high reliability and safety as the heater.

In the first embodiment, a description has been given, for example, the sliding guide section 4 has been described as having the rib shape and the sliding surface is in the linear state, however, this disclosure is not limited to such a construction, and the sliding surface may have a shape corresponding to the outer peripheral surface of the heating coil housing 14 fits and the sliding guide section 4 may have a construction that the vibration direction of the heating coil unit 2 controls and the heating coil unit 2 prevents it from swinging (lateral swinging). In the induction heater according to the first embodiment, the structure which can efficiently use the space inside the device and which can achieve the prevention of swinging (lateral swinging) of the heating coil as well as smaller size and smaller thickness by obtaining the sliding guide portion 4 on the side surface of the light-emitting display unit 3 is arranged.

(Light emission by the light-emitting display unit)

The 6 Fig. 12 is a block diagram of components constituting a display function of the light emitting display unit in the induction heating cooker according to the first embodiment. When in 6 the induction cooker by means of an operation for starting the cooking by the user on the operation display section 5 is started, a start signal in a heating control section 22 from the operation display section 5 entered. The heating control section 22 only causes the outermost light-emitting display units when the start signal is input 3 from the light-emitting display units 3 that are immediately under the cover plate 6 are arranged, for light emission, around the heatable area in the cover plate 6 display.

The heating control section 6 initiates a detection section upon input of the start signal 21 for the object to be heated, to perform a detection operation to be at each Heizspuleneinheit 2 to detect, oh the object to be heated is placed or turned off. This detection operation is performed by supplying a detection current to the heating coil 13 in each heating coil unit 2 performed and the presence or absence of the object to be heated is detected by a change of the detection current.

When the object to be heated on the heatable area on the cover plate 6 is arranged and at the location but essentially a Heizspuleneinheit 2 is arranged, gives the detection section 21 for the object to be heated based on the detection current in the heating coil unit 2 a detection signal as a result of the detection to the heating control section 22 out. If the detection section 21 for the object to be heated, the placement of the object to be heated on the heatable area of the cover plate 6 detected causes the heating control section 22 the light-emitting display unit 3 around the heating coil unit 2 to emit light. If the object to be heated by several Heizspuleneinheiten 2 In this case, it can be designed so that the light-emitting display unit 3 through the heating coil units 2 surrounded, which detect the object to be heated, emit no light. By such a construction, only the light-emitting display units become 3 at the peripheral portion of the heating area in which the object to be heated is heated by induction is caused to radiate light, and unnecessary lighting of the light emitting display units covered by the object to be heated in the heating area is avoided.

As described above, in the detection of the object to be heated by the detecting section 21 for the object to be heated, the heating control section 22 on the operation display section 5 indicate a heating operation area corresponding to a heating area in which the object to be heated is turned off. The user confirms the heating operation area displayed on the operation display section 5 is displayed performs a heating start command operation for the heating operation area. Upon execution of the command operation to start heating, the heating coil becomes 13 the heating coil unit 2 is substantially started in the heating area to generate an alternating magnetic field and the operation for induction heating is started. It may be arranged such that the display unit 3 for the emission of light indicative of the heating area of the heating coil unit 2 which has started heating by induction, is increased in its volume of light to indicate the heating area that performs the heating operation by induction. In this case, the color of the frame body indicating the heating range can be changed by changing the wavelength. Thus, the user can be assuredly indicated that the induction heating operation is carried out by displaying the heating area that initiates the heating operation by induction by changing (controlling) the light emission state of the display unit 3 is displayed for the emission of light.

7 FIG. 10 is a plan view showing a light emission state of the display unit. FIG 3 for emitting light when two objects that are to be heated 7 and 7 , on the heatable area of the cover plate 6 are parked at the Induction heater according to the first embodiment. In 7 becomes the light emission state of the display unit 3 shown for the emission of light, the cover plate 6 is removed and the cross-shaped opening portion 10a , which emits light, is indicated by hatching.

As in 7 shown radiates in the induction cooker according to the first embodiment, when the object to be heated 7 on the heating area on the cover plate 6 is placed, the display unit 3 for emitting light around the heating coil unit 2 around, the object to be heated 7 has covered, light off. In this case, the induction heater is constructed so that even if in such a case that the object to be heated 7 a section of the heating coil unit 2 covered, the heating coil unit 2 the object to be heated 7 will detect and the display unit 3 for emitting light around the heating coil unit 2 around will radiate light. In the induction cooker according to the first embodiment, the user is enabled to securely recognize the heating area without the handle, lid, etc. of the object to be heated 7 To be disturbed, because the heating area to the user through the cover plate 6 is informed by the light emission from the cross shape, ie, substantially the line shape at the position of the top of the rectangle or square, of substantially square shape when the object 7 To be heated, on the heatable area on the cover plate 6 is turned off.

In the light-emitting display unit 3 For the construction of the substantially point-like light emission, the light emission of the cross shape, which is the shape that continues in four directions, has been described. As a result, portions of the cross shape extended by light emission in the cross shape have the effect of making the user recognize a boundary indicating the heating area. For example, when the light-emitting display unit 3 , which radiates light in the cross shape at the corners of the heating area, two continued portions arranged to bend at right angles in the cross shape, can easily make the user visually recognize the corner of the heating area. When the light-emitting display unit 3 that radiates the light in the cross shape in the middle of the side of the heating area, two extending portions that extend linearly can easily visually make the user visually recognize that the extending portions indicate the side of the heating area. Consequently, the user can interact with the adjacent light-emitting display units 3 that radiate light in the cross shape to indicate the boundary of the heating area, the user, guided by the light emission state of the adjacent cross shapes, easily grasp the boundaries of the heating area.

Since the induction heating cooker according to the first embodiment is constructed to allow the user to know the position of the heating coil units 2 easy to recognize which object to heat 7 by induction heating, the user can highly efficient heating by induction of the object to be heated 7 perform by the object 7 to be heated is arranged so that the object will be in the center of the heating area (centering action).

In the induction heating cooker according to the first embodiment, the optical sensor becomes 15 with respect to the temperature detecting portion for the object to be heated so arranged to the temperature of the object to be heated 7 to capture when the object to be heated 7 is turned off in the heatable area and heated by induction. Consequently, the bottom temperature of the cooking pot as the object to be heated is constantly detected by the temperature detecting section for the object to be heated, and the detection signal becomes the heating control section as a result of the detection 22 entered. For this reason, the heating control section 20 be constructed to the volume of light and / or the wavelength (color) of the heating area depending on the detected temperature of the object to be heated 7 to change. Such a construction makes it easy for the user to control the temperature, a cooking operation, etc. at the time of cooking with respect to the object to be heated 7 perform.

In the induction heater as the induction heater according to the first embodiment, after the placement of an object to be heated 7 have been performed on the cover plate and the display of the heating area, the heating actuation by induction for the object to be heated 7 began. In the first embodiment, while the construction has been described as not displaying the heatable area after the display of the heatable area, it may be arranged such that even after the display of the heatable area, the heatable area is still displayed. In this case, the light emission state of the display unit 3 be changed to emit light in the heatable area after the display of the heatable area. For example, to display the heatable area after the display of the heatable area, light having the different light volume, wavelength (color) and / or light emission state (for example, flashing state) may be radiated from those of the heatable area, before the display of the heatable area.

The induction heater according to the first embodiment according to this disclosure constructed as described above, a construction may be performed to perform the point-type light emission display of the heatable area and / or the heating area, wherein the light emitting display units surrounding the heating coil unit 2 are arranged to be used. For this reason, the induction heater according to the first embodiment according to this disclosure becomes a heater that is easily usable for the user in the multi-coil construction in which a plurality of heating coils 13 under the cover plate 6 are arranged, and the heating device can be provided to the heating area clearly on the cover plate 6 display for the user, wherein an interruption by the object to be heated does not happen and this is easy and highly reliable usable.

((Second embodiment))

The induction cooker will now be described as an example of the induction heater according to a second embodiment according to this disclosure. In the induction heating cooker according to the second embodiment, a difference from the induction heating cooker according to the first embodiment is that the construction of the light emitting display unit is located immediately under the cover plate.

In the following description of the induction heating cooker according to the second embodiment, forming members having the same function and construction as the constituent members in the induction heating cooker according to the first embodiment will be given the same reference numerals and the description thereof will be described in detail applied to the first embodiment. A basic operation in the second embodiment is the same as the operation in the first embodiment described above, and therefore in the following description of the second embodiment, a description will mainly be made of the differences from the first embodiment.

8th is a plan view of several Heizspuleneinheiten 2 and light emitting display units 23 , etc., immediately below the cover plate 6 in the induction heater as the example of the induction heater according to the second embodiment according to this disclosure. The 9 Fig. 10 is a plan view of the cover plate in the induction heating cooker according to the second embodiment.

As in 8th shown in the induction cooker according to the second embodiment, a plurality of Heizspuleneinheiten 2 in the same manner as in the structure according to the first embodiment, side by side in the plane, in vertical and horizontal rows, and in horizontal rows and columns within the main body case, respectively 1 and the area immediately above the area in which the plurality of heating coil units 2 Arranged side by side, the induction heating is performed to the heated area and with the object parked in this area.

In the induction cooker according to the second embodiment, the light-emitting display units are 23 which are constructed in a grid state around each heating coil unit 2 arranged. It is in fact every heating coil unit 2 in a frame body having a right angle as a substantially square through the light emitting display units 23 is formed, arranged.

As described above, the light-emitting display units 23 are arranged in the frame body state around each of the heating coil units having a plurality of heating coils, and are constructed to make light in the frame state visible through the cover plate 6 radiate. In the induction heating cooker according to the second embodiment, the light emitting display unit becomes 23 later described in detail, because the heating coil unit 2 of the same construction as that of the heating coil unit 2 in the first embodiment and the light-emitting display unit 23 is of a different construction.

The 10 FIG. 15 is a perspective view of an enlargement of the heating coil units. FIG 2 , and the light-emitting display units 23 are arranged side by side in the induction cooker according to the second embodiment, and shows the state immediately below the heating area of the cover plate 6 , 11 is a partial cross-sectional view along the line XI-XI after 8th and shows the light emitting display unit 23 that is a light guide unit 25 and a light-emitting display housing 24 in contact with the side surface of the heating coil unit 2 Has. 12 is a partially sectioned view along the line XII-XII in 8th and FIG. 12 is a cross-sectional view showing the center of the heating coil unit 2 essentially cuts. The 11 and 12 show the construction of a heating coil unit 2 and the light-emitting display units 23 are arranged on both sides of it.

(Construction of the light-emitting display unit)

The light-emitting display units 23 are arranged in the frame body state to each Heizspuleneinheit 2 to surround and are constructed to light in the lattice state visible through the cover plate 6 radiate. The light-emitting display unit 23 has a light emitting device 8th for example, including an LED as a light emitting source, the light emitting display housing 24 the light-emitting device 8th incorporated therein, and the light guide unit 25 that have a light guide section 26 has, the incoming light from the light-emitting device 8th leads, and emits light by emitting light from its surface ends.

As in 10 shown is the light-emitting display housing 24 the light-emitting display unit 23 disposed within a space provided by the heating coil units 2 arranged side by side in the vertical and horizontal rows or rows and columns in a horizontal plane, and the light guide unit 25 pointing in four directions from the light-emitting display housing 24 is pulled out, is arranged to be in contact with the outer peripheral surface of the Heizspulengehäuses 14 in the heating coil unit 2 to get. The light-emitting display units 23 namely, are arranged around the Heizspuleneinheiten 2 , which are arranged side by side horizontally and vertically or in the longitudinal and transverse directions to surround.

The cover plate 6 In the induction cooker according to the second embodiment, for example, the transparent crystallized glass and the black colored film and the black colored layer, respectively, are used 16 is on the back or bottom of the cover plate 6 printed. This colored or colored layer 16 is with a double structure of the black light-transmitting film or layer 16a passing light and the black light shielding layer 16b , which shields light, trained. On the back of the cover plate 6 is the light-transmitting layer 16a over the entire surface except the operation display section 5 printed, and above that is the light-shielding layer 16b on a predetermined range, for example, the predetermined range except the opposite surface of the operation display portion 5 , the light emitting display unit 3 and the optical sensor 15 printed. That's why the cover plate is 6 designed so that from outside the user the components of the heating coil unit 2 , etc., within the main body case 1 through the cover plate 6 can not see.

As in 11 shown, the light guide unit 25 the plate-like light guide section 26 formed of a translucent resin, light guide holding portions 27 for holding right and left ends of the light guide section 26 and hanging the light guide section 26 between the adjacent light-emitting display housings 24 a light guide supporting portion 28 which is the bottom of the light guide section 26 supported and has a convex portion which is continued downward at its central portion, and a Gleitführungsabschnitt 29 (please refer 13 ) disposed on both side surfaces of the light guide section 26 and the light guide supporting portion 28 cover.

The 13 is a perspective view of the light guide unit 25 according to the second embodiment. As in 13 Shown is the top surface of the cover plate 6 in the light guide section 26 is opposite, not covered, and is constructed such that the light from the light-emitting device 8th from the top surface as the upper side surface of the light guide portion 26 is emitted. In the light guide unit 25 , in the 13 is shown, the light emitting device 8th arranged below a stepped part on both sides of the light guide section 26 is formed, and is designed to light from both sides of the light guide section 26 radiate. As a result, the top surface (surface of the top plate side) becomes the light guide portion 26 causes light to be substantially uniform in a linear state by the light emitted by the light-emitting device 8th is radiated on both sides to radiate. As a result, the light-emitting display unit becomes 23 in the state of light emission designed so as to have a very good visibility through the cover plate 6 to have.

In the induction cooker according to the second embodiment, the side surfaces other than the top surface of the light guide section are 26 represent, with a light-shielding body 30 coated to prevent light from coming out. The shielding body 30 has a light-shielding function as well as a heat-insulating function, and will be described later as the light guide section 29 used. For this reason, the light-shielding body is made of a material having a slippery surface. In the second embodiment, a mica material is used as the light-shielding material. Because the light guide unit 25 constructed as above between the adjacent heating coil units 2 is disposed so as to be in contact with them, the heat insulation is between the heating coil units 2 secured.

(Construction of the sliding guide section)

As in 13 shown is the sliding guide unit 25 in the light-emitting display unit 23 with the sliding guide section 29 also as a light-shielding body 30 is used, at the position opposite the Heizspuleneinheit 2 intended. The sliding guide section 29 is formed of the mica plate and is arranged to be capable of on the outer peripheral surface of the Heizspulengehäuses 14 in the heating coil unit 2 to glide. The sliding guide section 29 has a downwardly extending convex portion 18 on, which is formed at its central portion

As described above, the induction heating cooker according to the second embodiment is constructed such that the outer peripheral surface of the heating coil housing 14 in contact with a central portion in a longitudinal direction of the sliding guide portion 29 will be, and the convex section 18 which extends downward is at the central portion in the longitudinal direction of the sliding guide portion 2 educated. Therefore, the induction heating cooker according to the second embodiment is constructed such that such a portion of the sliding guide portion 29 in contact with the heating coil housing 14 is elongated in the direction up and down (direction of the pressure against the cover plate). For this reason, the induction heating cooker according to the second embodiment is constructed such that even when the heating coil unit 2 through the compression coil spring 11 vibrates, the outer peripheral surface of the Heizspulengehäuses 14 in constant contact with the sliding guide section 29 will stay without getting out of touch.

Since the Gleitführungsabschnitt 29 As described above, controls the Gleitführungsabschnitt 29 the vibration direction of the heating coil unit 2 even if the heating coil unit 2 in a vibration state by the compression coil spring 11 in transportation, etc., of the heating induction cooker, and certainly prevents the cause of malfunction such as a contact or a collision caused by the vibration of the heating coil unit 2 is caused. In the induction cooker according to the second embodiment, the sliding guide portion is 29 by using the mica plate to heat between adjacent heating coil units 2 to isolate. This makes it possible to arrange a space between the heating coil units 2 to reduce or shorten to achieve a smaller size and more efficiency, and to build a more reliable induction heating apparatus. Furthermore, the sliding guide section 29 also as a light-shielding body 30 serves, on the side surface of the light guide unit 25 the light-emitting display unit 23 is arranged, the induction heating device according to the second embodiment is constructed so as to be able to effectively use the space inside the device and prevent the heating coil from swinging (lateral vibration) as well as a smaller size and a smaller size to achieve smaller thickness.

In the second embodiment, while the example of the Gleitführungsabschnitts 29 has been described as having a sliding surface on a planar shape, this disclosure is not limited to such a construction, but the sliding surface may also have a curved surface shape, which is to the outer peripheral surface of the Heizspulengehäuses 14 fits. Any configuration is good, as long as this the vibrations (lateral vibrations) of the heating coil unit 2 prevented by the vibration direction thereof only in one direction up and down regulated or deflected.

(Light-emitting operation of the light-emitting display unit)

Since the light-emitting operation of the light-emitting display unit 23 in the induction cooker according to the second embodiment, substantially the same as the light emitting display unit 3 In the first embodiment and operating with the same constituent constituents as in the first embodiment, the light-emitting operation will be described, wherein the constituent components, in the block diagram after 6 are shown used.

When the induction heating cooker is operated by the user to start cooking by the user on the operation display section 5 is started, the start signal to the heating control section 22 from the operation display section 5 entered. The heating control section 22 caused by input of the start signal only that the outermost light-emitting display units 23 among the multiple light-emitting display units 23 that are immediately under the cover plate 6 are arranged to emit light to the heatable area of the cover plate 6 display.

The heating control section 6 when entering the start signal causes the detection section 21 for detecting the object to be heated to perform the detection operation to at each Heizspuleneinheit 2 to capture whether the object to be heated 7 has been turned off or not. This detection operation is performed by supplying the detection current to the heating coils 13 in each heating coil unit 2 performed and the Presence or absence of the object to be heated 7 is detected by changing the detection current.

When the object to be heated 7 on the heatable area on the cover plate 6 has been turned off and at the position substantially above a Heizspuleneinheit 2 has been arranged, gives the detection section 21 for the object to be heated based on the detection current of the heating coil unit 2 the detection signal as results of detection to the heating control section 22 out. When the detection section 21 for the object to be heated, the placement of the object to be heated 7 on the heatable area on the cover plate 6 detected, causes the Heizsteuerabschnitt 22 the light-emitting devices 8th in the light-emitting display units 23 around the heating coil unit 2 around to radiate light. In this case, it may be arranged such that when the object to be heated 7 through the several heating coil units 2 is detected, the light guide section 26 the light-guiding unit 25 between the heating coil units 2 is present, the object to be heated 7 detect, to emit light.

The 14 FIG. 10 is a plan view showing the state of light emission of the light-emitting display unit. FIG 23 documented when two objects that are to be heated 7 and 7 , on the heatable area of the cover plate 6 are turned off in the induction cooker according to the second embodiment. at 14 becomes the light-emitting state of the light-emitting display unit 23 shown, with the cover plate 6 has been removed and the light-guiding section 26a that emits light has been indicated by dashes.

As in 14 shown in the induction cooker according to the second embodiment, when the object to be heated 7 in the heatable area on the cover plate 6 is turned off, the light-emitting display units 23 around the heating coil unit 2 around, the object to be heated 7 detect, light off. In this case, the induction cooker or induction cooker is constructed such that even in the case where the object to be heated 7 a part of a heating coil unit 2 covered, the heating coil unit 2 the object to be heated 7 will detect and the light-emitting display units 23 around the heating coil unit 2 around will radiate light. In the induction cooker according to the second embodiment, the user recognizes the heating area by the shape of the rectangular frame body through the cover plate 6 by the light emission from the light-emitting display unit 23 and is enabled to reliably detect the heating area on the cover plate without the handle, lid, etc. of the object to be heated 7 to be disturbed.

Since the induction heating cooker according to the second embodiment is constructed so as to enable the user to easily set the heating coil units 2 to recognize, by induction, the object to be heated 7 The user can heat the object to be heated so that it is highly efficiently heated by induction by the heating coil unit by the object 7 which is to be heated is placed at the best position so that the object will be in the center of the heating area (centering encounter).

While the induction cooker according to the second embodiment is constructed such that when the object to be heated on the cover plate 6 is arranged, the light-emitting display unit 23 around the heating coil unit 2 around, which detects the object to be heated, will display the heating area by emitting light in the state of the frame body, it may be constructed such that an area larger in size than the heating area is displayed. An area larger by a size, the light-emitting display units 23 adjacent to the light-emitting display units 23 around the heating coil unit 2 namely, which detected the object to be heated will be displayed by emitting light. This construction produces excellent effects particularly when the heating coil unit has a small diameter immediately under the cover plate and this construction enables the user to perform the operation for centering the object to be heated to the heating area safely and easily.

The cover plate does not necessarily have the body with the black layer printed on the back side of the transparent crystallized glass, and the construction comprising the colored glass itself is also good. For the induction heater according to this disclosure, any configuration is good as long as components are inside the main body case 1 invisible to the user and the light-emitting state of the light-emitting display unit 3 and the display section of the operation display section 5 can be visually recognized.

The constructed as described above An induction heater according to the second embodiment according to this disclosure is configured to form the light-emitting display in the form of the frame body from the heatable area and the heatable area on the cover plate 6 perform, wherein the light-emitting display units 23 around the heating coil unit 2 are arranged around are used. For this reason, the induction heater according to the second embodiment according to this disclosure becomes a heater easily accessible to the user in the multiple coil design having a plurality of heating coils underlying the cover plate 6 are arranged to use, and the heating device can be provided so that they clearly the heating area on the cover plate 6 indicates to the user and is easy and very reliable to use.

((Third Embodiment))

The induction cooker will now be described as an example of the induction heater according to the third to fifth embodiments according to this disclosure. In the third to fifth embodiments, in particular, the induction cooker constructed to have the operation display portion on the underside of the cover plate in the construction according to the first and second embodiments as described above is to be described. First, problems known to the inventor in this induction heater thus constructed will be described.

With respect to the conventional induction cooker, for example, a heating cooker is known which uses a portion of the upper surface as an observation window made of a transparent material and having a liquid crystal display device disposed thereunder (for example, see Patent Literature 3). The induction cooker is known to only supply a high-frequency electric current to the heating coil which has detected the placement of the object to be heated above (see, for example, Patent Literature 4).

Recently, in the induction heating cooking, the construction having four or more heating coils has also been known (see, for example, Patent Literature 4).

In the case of using a liquid crystal display device as a display section, the liquid crystal display device is heat sensitive and may be damaged by heat even if it is on the order of about 60 ° C to 70 ° C. For this reason, a heated object to be heated, such as a pot, when placed in the vicinity of the liquid crystal display device, may possibly damage the liquid crystal display device.

There is a case of assembling an operation display section by overlapping an operation section in the form of an electrostatic-type touch panel over the liquid crystal display device and arranging it in contact with the underside of the cover plate. The touch panel, which can be made of a resin, is not sufficiently heat-resistant, and when a high-temperature cooking utensil such as a pot comes close, the probability of destroying the touch panel becomes higher due to a temperature rise. Particularly, in the case of the plural coils having a plurality of heating coils arranged, since the cooking utensil can be relatively freely turned off, the cooking utensil such as a pot can be placed near the operation display portion. Further, in the case of the plural coils, the operation display portion may be surrounded by the heating coils (see, for example, Patent Literature 3), and the probability increases that the cooking utensil such as the pot may come close to the display portion (operation portion).

In the conventional induction cooker, however, because the display portion (liquid crystal display portion) and the heating coil were located slightly apart from each other in a plane, nothing was considered with respect to the display portion exposed by the object to be heated, such as the pot, was impaired.

In particular, the induction heater according to the third to fifth embodiments according to this disclosure, in particular, solves the above problem of the conventional induction cooker and provides the induction heating cooker in which the operation display portion is disposed under the cover plate and the placement of the heated one to be heated Object, such as a pot, in the vicinity of the operation display portion can suppress or avert.

The induction heater as the induction heater according to the third to fifth embodiments according to this disclosure, the cover plate, the heating coil, which is disposed under the cover plate, the operation display portion, which is disposed below the cover plate, and the proximity sensor, the proximity of a Object to the operation display section detected, and is designed to control the heating amount of the heating coil when the proximity sensor detects the proximity of the object to the operation display section.

According to the induction heating cooker constructed as described above, according to the third to fifth embodiments, when the proximity sensor detects the proximity of the object to the operation display portion, the heating amount of the heating coil is controlled. As a result, the damage of the operation display portion can be suppressed by the heating of the object to be heated, such as a pot.

An example of the induction heating cooker as the induction heater according to the third embodiment will now be described specifically with reference to the accompanying drawings.

The 15 is a top view of an induction cooker 110 according to the third embodiment, wherein the cover plate has been removed. The 16 FIG. 10 is a plan view of a schematic construction of the operation display section in the induction heating cooker. FIG 110 , The 17 Fig. 10 is a schematic cross-sectional view of a cross-sectional structure of the induction heating cooker 110 like this from the direction of AA to 15 you can see. 18 is a block diagram of the construction of the induction heating cooker 110 , The induction cooker 110 according to the third embodiment has a cover plate 111 , a heating coil (heating coil unit) 117 , an operation display section 115 by overlapping a liquid crystal display device 113 and an operation section 114 is composed, and a proximity sensor 116 , The heating coil 117 , the operating display section 115 and the proximity sensor 116 are in a housing 112 included and are under the cover plate 111 arranged. The proximity sensor 116 located in an area between the service display section 115 and the adjacent heating coils 117 is arranged, detects the proximity of an object to the operation display section 115 , When the proximity sensor 116 the approach of the object to the operation display section 115 detected, the heating amount of the heating coil 117 to be controlled. This makes it possible to heat the heating coil 117 to control the object and the effect of the heat on the operating section 115 even in the case of approximating the object to the operation display section 115 ,

When the proximity sensor 116 the proximity of the object to the operation display section 115 detected, the approaching of the object on the operation display section 115 are displayed. This makes it possible for the user to move from the approximation of the object to the operation display section 115 to inform.

The operation display section 115 can be constructed such that it has a cooling fan (cooling device) 118 having. Furthermore, a control section 130 be arranged to the heating coil 117 , the operation display section 115 , the proximity sensor 116 and the fan 118 or the cooling impeller 118 to control. The control section 130 is not required to be arranged independently, and by constructing it as a circuit for driving the heating coil 117 or as an operation display section 115 be realized.

Training components that use the induction cooker 110 according to the third embodiment, will now be described.

(Top panel)

The cover plate 111 is a plate around the top surface of the case 112 and is one on which the cooking utensil, such as the pot (object to be heated) is placed or placed. The cover plate 111 is, for example, a transparent crystallized glass having a transmissive transmission layer, etc., printed on its underside. Because the cover plate 111 that looks black to the user, transmits light, makes them in practical use of a light-emitting portion (light guide unit) 121 that emits light and a temperature sensor that uses infrared rays, no problem. Because the black print is not made on the area corresponding to the operation display section 115 is opposite, is the cover plate 111 transparent on this part of the surface. The cover plate 111 is necessarily required to print the black paint on the underside of the crystallized glass and the glass itself can be colored. In this case, however, because the visibility of the operation display section 115 becomes weak, a device of the display method is required (for example, increased brightness, etc.) of the liquid crystal display section 113 ).

(Casing)

The housing 112 forms the exterior of the induction cooker 110 according to the third embodiment and the induction cooker 110 is formed by the top surface of the housing 112 through the cover plate 111 is covered. The operation display section 115 by overlapping the liquid crystal display section 113 and the operating section 114 is composed of the proximity sensor 116 , 45 heating coils 117 , the cooling fan 118 as a cooling device, and the circuit (not shown) for driving the heating coil 117 are inside the case 112 added.

(Heating coil (heating coil unit))

The heating coil 117 in the heating coil unit is against the underside of the cover plate 111 by a compression coil spring (preloading portion) 120 pressed. The number of heating coils 117 which is used may be one, two or three. Alternatively, the heating coil 117 a plurality of coils to an object to be heated, such as the pot, by means of a plurality of heating coils 117 to heat. For example, the heating coil unit 45 may have heating coils 117 , as in the plan view 15 shown have. The heating coils 117 ( Heating coil unit) can only on the back (upper side in 15 ) of the operation display section 115 be arranged, wherein a space on the side of the operation display section 115 is provided. By the space on the page (in right and left side areas in 15 ) of the operation display section 115 is provided, it allows the probability of the object to be heated in the vicinity of the operation display section 115 to disperse.

As described in the plan view in the fifth embodiment and after 22 shown, which can be described later, the heating coil 117 in all three directions on the side and the back (upper side in 22 ) from the operation display section 115 be arranged. Consequently, it is by arranging the heating coil 117 in three directions from the operation display section 115 allows a flat section of the cover plate 111 widely used as the heating area. In the induction heating according to the third embodiment, the heating amount of the heating coil 117 controlled when the proximity sensor 116 the proximity of the object to the operation display section 115 detected.

When heating by means of the heating coil 117 adjacent to the operation display section 115 is performed, the adjacent heating coil 117 heated at the time of detection by the proximity sensor 116 which controls the proximity of the object to be controlled. When the heating coil 117 adjacent to the operation display section 115 the heating of the object as the object to be heated is detected and in competition with when the proximity sensor 116 the proximity of the object to the operation display section 115 detected, it is considered that by the heating coil 117 heated object nearer the operation display section 115 is. Then, by detecting the heating of the object to be heated by the heating coil 117 adjacent to the operation display section 115 in addition to the detection of the object by the proximity sensor 116 the proximity of the object to the operation display section 115 be detected even more securely.

(Light-emitting section)

The light-emitting sections (light guide units) 121 can be arranged to emit light and are around the heating coil 117 arranged around. By causing the light-emitting portions (light guide units) 121 that has an active heating coil 117 surrounded to emit light, it can be made easier for the user, visually the active heating coil 117 capture. Especially if the heating coil 117 the multiple coil, it becomes easier to visually capture the active heating coils. The light-emitting section (light guide unit) 121 has an arbitrary configuration and is not a required construction in the induction heating cooker according to the third embodiment.

(Indicator portion)

The operation display section 115 is by overlapping the liquid crystal display section 130 and the operating section 114 compiled. The operation display section 115 gets to the bottom of the cover plate 111 by a compression coil spring (preloading portion) 119 preloaded or prestressed. Because there is a gap between the operating section 114 and a finger of the user is low and stabilized on a predetermined space, the operating portion 115 be composed to have a good sensitivity and the operation section 114 becomes easier to use. While in the plan view of the 15 and 22 only one operation display section 115 in the area on the center of the front (on the lower side in 15 ) is the placement of the operation display section 115 not necessarily limited to the center of the front and the operation display section 115 can, for example, either on the right or the left side of the cover plate 111 be arranged. Further, the number of operation display sections 115 not limited to one, but there may be several operation display sections 111 be arranged.

(Liquid crystal display portion)

A conventional liquid crystal display panel may be used as the liquid crystal display section 113 be used. When the proximity sensor 116 the approximation of the object to the operation display section 115 detected, the proximity of the object on the operation display section 113 being represented. Furthermore, if the proximity sensor 116 continuously the proximity of the object to the operation display section 115 detected over a predetermined period of time, the proximity of the object on the operation display section 115 be reproduced.

(Operating or operating section)

The operating section 114 is through a touch panel 123 formed by the electrostatic, capacitive type, which is in contact with the underside of the cover plate 111 is arranged. In this construction, the operating portion uses 114 For example, ITO (Indium Tin Oxide) as a transparent electrode, wherein a matrix for wiring vertically and horizontally and horizontally to and from behind, as in 16 is shown, which detects which part of the touch panel 123 has been touched by the finger and connects itself to the operation key on the liquid crystal display section 113 is pictured. The wirings of the vertical and horizontal matrix and the matrix in front and behind in a plane are electrically isolated by an insulating material, etc.

(Proximity sensor)

The proximity sensor 116 located in the area between the operation display section 115 and the adjacent heating coils 117 is arranged detects the vicinity of the object to the operation display section 115 , The proximity sensor 116 is for example a touch panel 124 electrostatic capacitive type, which is in the area between the liquid crystal display device 113 and the adjacent heating coils 117A is arranged and by a support plate 125 is supported to an air flow space 116a on the underside of the cover plate 111 train. Because the cover plate 111 thermally through the room 116a is isolated, can increase the temperature of the proximity sensor 116 (Touch panel 124 ) are suppressed.

The proximity sensor 116 (Touch panel 124 ) and the operating section 114 (Touch panel 123 ) may be made of a same heat-resistant material and the operating portion 114 is constructed to also act as the proximity sensor 116 to work. The operating section 114 and the proximity sensor 116 can be integrated into a body. Alternatively, the operation section 114 something in the direction of the heating coil 117A extends to the function of the proximity sensor 116 to realize. Then, the number of parts can be reduced and significantly lower costs can be achieved.

When the operation section 114 is designed to also act as the proximity sensor 116 To work, the proximity sensor can work 116 instead of in the direction of the heating coil 117A to be arranged to also be referred to as the operation section 114 only on the liquid crystal display section 113 to serve. For example, the operation section 114 by containing an electrostatic electrode, be constructed to also act as the proximity sensor 116 to work. An electrostatic capacitive sensing system detects a change in the state of discharge from the electrostatic electrode, and only if the object, such as a pot, comes close to the electrostatic electrode does the electrostatic electrode change the state of discharge and can play the role of the proximity sensor 116 fulfill.

Further, the proximity sensor 116 not limited to a sensor of the electrostatic capacitive type, such as the touch panel. The proximity sensor 116 For example, an infrared sensor may be detected that detects the proximity of the heated object. The proximity sensor 116 can be a temperature sensor 122 such as a thermistor or a thermocouple. In the case that the proximity sensor 116 is a temperature sensor, when the temperature sensor detects a temperature in excess of a threshold temperature, that for the operation display section 115 is allowed, the amount of heating for the heating coil 117 controlled. Furthermore, the proximity sensor 116 a piezoelectric element that detects the pressure through the object.

• a) Detektiere die Erhitzung des zu erhitzenden Objektes durch die Heizspule 117 benachbart zu dem Betriebsanzeigeabschnitt 115. Durch eine Änderung der Impedanz der Schaltung einschließlich der Heizspule 117 abhängig von der Gegenwart oder der Abwesenheit des zu erhitzenden Objektes, wie etwa dem Topf, auf der Heizspule 117 wird der Wert des Stromes, der durch die Heizspule 117 fließt, geändert. Dann kann die Erhitzung des zu erhitzenden Objektes durch die Heizspule 117 detektiert werden, indem der Wert des Stromes gemessen wird, der durch die Heizspule 117 nach der dritten Ausführungsform fließt. Das Verfahren zur Erfassung der Erhitzung des Objektes, das zu erhitzen ist, durch die Heizspule 117 ist nicht auf das obige Verfahren beschränkt.
• b) Die Detektion der Näherung des Objektes zu dem Betriebsanzeigeabschnitt 115 wird durch den Näherungssensor 116 zu jeder vorbestimmten Zeit durchgeführt.

In the induction cooker 110 According to the third embodiment, the approximation of the object becomes the operation display section 115 through the proximity sensor 116 detected. Furthermore, in addition to the detection by the proximity sensor 116 the approximation of the object to the operation display section 115 if the following two conditions a) and / or b) are met.

• a) Detect the heating of the object to be heated by the heating coil 117 adjacent to the operation display section 115 , By changing the impedance of the circuit including the heating coil 117 depending on the presence or absence of the object to be heated, such as the pot, on the heating coil 117 is the value of the current passing through the heating coil 117 flows, changed. Then, the heating of the object to be heated by the heating coil 117 can be detected by measuring the value of the current passing through the heating coil 117 flows according to the third embodiment. The method for detecting the heating of the object to be heated by the heating coil 117 is not limited to the above method.
• b) The detection of the approximation of the object to the operation display section 115 is through the proximity sensor 116 performed at every predetermined time.

When the heating of the object to be heated by the heating coil 117 adjacent to the operation display section 115 in the case a) is detected above and in competition with when the approximation of the object to the operation display section 115 through the proximity sensor 116 is detected, it is considered that the object passing through the heating coil 117 is heated, in the vicinity of the operation display section 115 is. Then, the approximation of the heated object to the operation display section 115 even safer by detecting the heated object passing through the heating coil 117 is to be heated, adjacent to the operation display section 115 be captured, in addition to the Detection of the object by the proximity sensor 116 , The detection at every predetermined time in accordance with b), as explained above, may cause a malfunction by detecting the approximation of the object to the operation display section 115 Exclude and accurate detection can be made possible.

(Cooling means)

For example, the impeller 118 for cooling or the fan 118 be used as a coolant. As in the cross-sectional view 17 shown is the cooling fan 118 under the operation display section 115 arranged and cools the operation display section 115 from below, for example by blowing air, as indicated by an arrow, and cools the proximity sensor 116 (Touch panel 124 ) through the air, through the room 116a flows. The direction of the flow of air indicated by the arrow is an example and the direction of the air is not limited to this. The cooling capacity of the cooling impeller or fan 118 may be increased in the case that the approximation of the object to the operation display section 115 is detected. There is no problem in increasing the number of rotations of the cooling impeller 118 especially if the duration is a short period of time. The cooling capacity of the cooling impeller or fan 118 can be increased when the proximity sensor 116 the proximity of the object detected while the heating coil 117 adjacent to the operation display section 115 is heated. Alternatively, the cooling ability of the cooling impeller 118 be increased when the temperature sensor 122 the temperature beyond the threshold temperature detected, that for the operation display section 115 allowed is. The cooling device is not on the cooling impeller or the fan 118 limited, but a heat pump, etc., can be used.

(Control section)

The control section 130 controls the heating coil 117 , the operation display section 115 , the proximity sensor 116 and the cooling impeller or cooling fan 118 , It is not necessary the control section 130 In any case, it can be realized by a construction as a circuit to the heating coil 117 to drive or as the operation display section 115 ,

(Operation method for induction cooker)

• (a) Start eines Betriebes des Näherungssensors 116 (S01).
• (b) Einstellen des Ausganges der Heizspule 117 (S02).
• (c) Erfassung der Näherung des Objektes durch den Näherungssensor 116 (S03). Die Detektion der Näherung des Objektes durch den Näherungssensor 116 kann jede feste Zeit durchgeführt werden oder kann kontinuierlich durchgeführt werden. In dem Fall der kontinuierlichen Durchführung der Erfassung der Näherung kann dieser so angeordnet sein, dass es entschieden wird, dass das Objekt in der Nähe ist, wenn die Näherung des Objektes kontinuierlich über eine vorbestimmte Zeit erfasst worden ist. Die Näherung des Objektes kann detektiert werden, indem mehrere Näherungssensoren 116 in Konkurrenz zueinander verwendet werden oder diese in einer Reihenfolge verwendet werden. Die Genauigkeit der Detektion der Näherung des Objektes kann durch Verwendung von mehreren Näherungssensoren 116 verbessert werden.
• (d) Der Ausgang der Heizspule 117 wird gesteuert, wenn der Näherungssensor 116 die Näherung des Objektes zu dem Betriebsanzeigeabschnitt 115 (S04) detektiert. In diesem Fall kann die Heizmenge verringert werden oder auf null abgesenkt werden.
• (e) Nach S04, wird die Näherung des Objektes auf dem Betriebsanzeigeabschnitt 115 (S05) angezeigt. Danach wird zu dem Schritt (S03) zu Erfassung der Näherung des Objektes zu dem Näherungssensor 116 zurückgekehrt.
• (f) Wenn andererseits der Näherungssensor 116 die Nähe des Objektes zu dem Betriebsanzeigeabschnitt 115 nicht detektiert, dann wird der Ausgang der Heizspule 117 auf den eingestellten Ausgang (S06) eingestellt. Dies wird zu dem Zweck durchgeführt, um den Ausgang der Heizspule 117 auf den ursprünglich eingestellten Ausgang zurückzusetzen, weil als Ergebnis der Steuerung der Heizmenge der Ausgang der Heizspule 117 niedriger sein kann, als der eingestellte Ausgang.
• (g) Nach S06 wird die Anzeige des Betriebsanzeigeabschnitts 115 auf die normale Anzeige (S07) geändert. Danach wird zu dem Schritt (S03) zur Erfassung der Nähe des Objektes durch den Näherungssensor 116 zurückgekehrt.

The 19 FIG. 10 is a flowchart of an operation method of the induction heating cooker according to the third embodiment. FIG.

• (a) Start operation of the proximity sensor 116 (S01).
• (b) Adjusting the output of the heating coil 117 (S02).
• (c) detection of the proximity of the object by the proximity sensor 116 (S03). The detection of the proximity of the object by the proximity sensor 116 Every fixed time can be carried out or can be carried out continuously. In the case of continuously performing the detection of the approximation, it may be arranged to decide that the object is near when the approach of the object has been continuously detected over a predetermined time. The approximation of the object can be detected by using multiple proximity sensors 116 be used in competition with each other or used in an order. The accuracy of detection of the proximity of the object can be determined by using multiple proximity sensors 116 be improved.
• (d) The output of the heating coil 117 is controlled when the proximity sensor 116 the approximation of the object to the operation display section 115 (S04) detected. In this case, the amount of heating can be reduced or lowered to zero.
• (e) After S04, the approximation of the object on the operation display section becomes 115 (S05) is displayed. Thereafter, the step (S03) of detecting the proximity of the object to the proximity sensor becomes 116 returned.
• (f) If, on the other hand, the proximity sensor 116 the proximity of the object to the operation display section 115 not detected, then the output of the heating coil 117 set to the set output (S06). This is done for the purpose of controlling the output of the heating coil 117 to reset to the original output, because as a result of the control of the amount of heating the output of the heating coil 117 may be lower than the set output.
• (g) After S06, the display of the operation display section becomes 115 changed to the normal display (S07). Thereafter, the step (S03) of detecting the proximity of the object by the proximity sensor 116 returned.

The above enables the proximity of the object to the operation display section 115 to detect and avoids the damage of the operation display section 115 that is caused by heat.

(Modifications)

• (a) Start des Betriebes des Näherungssensors 116 (S11).
• (b) Der Ausgang der Heizspule 117 (S12) wird eingestellt.
• (c) Die Näherung des Objektes durch den Näherungssensor 116 (S13) wird detektiert.
• (d) Steuerung des Ausganges der Heizspule 117, wenn der Näherungssensor 116 die Näherung des Objektes zu dem Betriebsanzeigeabschnitt 115 (S14) erfasst.
• (e) Nach S14, Anzeigen der Näherung des Objektes auf dem Betriebsanzeigeabschnitt 115 (S15).
• (f) Nach S15, Erhöhung der Leistung des kühlenden Flügelrades bzw. Ventilators (Kühleinrichtung) 118 (S16). Danach Rückkehr zu dem Schritt (S13) zur Detektion der Näherung des Objektes durch den Näherungssensor 116.
• (g) Falls andererseits der Näherungssensor 116 nicht die Näherung des Objektes zu dem Betriebsanzeigeabschnitt 115 erfasst, dann Einstellen des Ausganges der Heizspule 117 auf den eingestellten Ausgang (S17).
• (h) Nach S17, Änderung der Anzeige des Betriebsanzeigeabschnitts 115 auf die normale Anzeige (S18).
• (i) Nach S18, Rückkehr der Leistung des kühlenden Flügelrades (Kühleinrichtung) 118 auf die normale. Danach Rückkehr zu dem Schritt (S13) der Erfassung der Näherung des Objektes zu dem Näherungssensor 116.

The 20 FIG. 10 is a flowchart of an operation method of the induction cooker according to a modified one Example of the third embodiment. As with the flowchart 19 In comparison, this variation example differs in that in the case of detecting the proximity of the object to the operation display section 115 the cooling capacity of the cooling impeller (cooling device) 118 that the operation display section 115 cools, increases.

• (a) Start the operation of the proximity sensor 116 (S11).
• (b) The output of the heating coil 117 (S12) is set.
• (c) The approximation of the object by the proximity sensor 116 (S13) is detected.
• (d) controlling the output of the heating coil 117 when the proximity sensor 116 the approximation of the object to the operation display section 115 (S14) is detected.
• (e) After S14, display the approximation of the object on the operation display section 115 (S15).
• (f) After S15, Increase Performance of Cooling Impeller or Fan (Cooling Device) 118 (S16). Thereafter return to the step (S13) for detecting the proximity of the object by the proximity sensor 116 ,
• (g) If, on the other hand, the proximity sensor 116 not the approximation of the object to the operation display section 115 detected, then adjusting the output of the heating coil 117 to the set output (S17).
• (h) After S17, change the display of the operation display section 115 to the normal display (S18).
• (i) After S18, return of the performance of the cooling impeller (cooling device) 118 to the normal. Thereafter, return to the step (S13) of detecting the approach of the object to the proximity sensor 116 ,

The above makes it possible to approximate the object to the operation display section 115 to detect and damage the operation display section 115 to avoid the heat. In this case, because the cooling capacity of the cooling impeller (cooling device) 118 is increased when the approximation of the object to the operation display section 114 is detected, the operation display section 115 be cooled faster and the damage of the operation display section 115 , caused by the heat, can be better suppressed or avoided.

((Fourth Embodiment))

The 21 is a partial cross-sectional view of a construction of a proximity sensor 127 and an operating section 126 an induction cooker 110a according to a fourth embodiment according to this disclosure. Also according to 21 will be in the same way as after 17 the flow of cooling air is indicated by the arrow. The stream of the air indicated by the arrow is an example and the stream of air is not limited to it. Compared with the induction cooker according to the third embodiment, the induction cooker differs 110a according to the fourth embodiment, by the operation section 126 and the proximity sensor 127 integral as a body by means of an electrostatic electrode 128 composed of translucent type, on the underside of the cover plate 111 is printed.

With the operating section 126 and the proximity sensor 125 containing the transparent electrostatic electrode 128 on the underside of the cover plate 111 As described below, since a base material is not a resin, but crystallized glass of the cover plate 111 , the thermal resistance can be increased and the damage of the proximity sensor 127 Further, even in the case of approximating the object to be heated, such as the pot, it can be avoided. While the electrostatic electrode 128 not only over the upper surface of the liquid crystal display section 113 but also over the space between the heating coil 117 adjacent to the liquid crystal display section 113 and the liquid crystal display section 113 is arranged, it is the point that, if the electrostatic electrode 128 can detect the proximity of the object, such as the pot, then the electrostatic electrode 128 only over the upper surface of the liquid crystal display section 113 can be arranged. The operating section 126 and the electrostatic electrode 128 can also be used as the proximity sensor 127 function. In general, the electrostatic capacitive detection system detects a change in the state of discharge from the electrostatic electrode 128 , and only if the object, such as the pot, the electrostatic electrode 128 comes close, changes the electrostatic electrode 128 the discharge state and can the role of the proximity sensor 127 take.

((Fifth embodiment))

The 22 is an overall top view of the induction cooker 110b according to the fifth embodiment according to this disclosure. As compared with the induction cooker according to the third embodiment, the induction cooker differs 110b according to the fifth embodiment, by the heating coil not only in an upward direction of the operation display portion 115 but in all three directions, including a sideward direction from the operation display section 115 , The induction cooker 110b differs from the induction cooker according to the third embodiment by the proximity sensors 136a . 136b and 136c between the operation display section 115 and the heating coils 117 are arranged in three directions that the operation display section 115 surround.

In the induction cooker according to the fifth embodiment, the approximation of the object to be heated may be from any direction of the heating coils 117 which are arranged in the three directions that the operation display section 115 surrounded, be detected, because the proximity sensors 136a . 136b and 136c in three directions, which is the operation display section 115 surrounded, arranged.

((Sixth Embodiment))

The induction heater will now be described by means of a sixth embodiment according to this disclosure. In particular, in the sixth embodiment, a cooling structure in the energizing means with respect to the structure of the first to fifth embodiments described above will be described. Problems will now be described which are known to the inventor with respect to induction cookers constructed in this way.

The conventional induction heater comprises the cover plate on which a cooking container is placed, and below the cover plate, a coil unit containing the heating coil for heating the cooking container, a plurality of ferrite portions disposed below the heating coil, and a coil base is disposed below the heating coil, a heat distribution plate on which the coil unit is immediately placed, and a blower for cooling the heat distribution plate by the cooling air (see, for example, Patent Literature 5).

To describe the operation of the above construction when the cooking container is set on the cover plate, the heating coil is energized, magnetic flux is generated by the heating coil, generated by an eddy current in the bottom surface of the cooking container, and the cooking container heats itself (Joule heat ) to a predetermined temperature.

However, the conventional induction heater has had a problem that while the magnetic flux is generated by the heating coil and this occurs on the lower side, it is largely nullified by the ferrite, the leaking magnetic flux forming the eddy current on the heat distributing plate, which leads to self-heating. Namely, the cooling effect of the heating coil becomes worse by the amount of self-heating of the heat distributing plate, requiring measures such as squeezing the entrance of the heating coil and increasing the amount of air bubbles, and it becomes difficult to use the induction heater.

Further, the conventional induction heater has a problem that, while the heating coil is simply placed on the underside of the cover plate, a space can be caused between the heating coil and the cooking vessel and the adjustment of the magnetic flux from the heating coil can be increased by the amount by which the efficiency of the induction heating by the cooking tank is reduced by this space.

As a result, the heating coil becomes larger, and the amount by which the adjustment must be increased to generate an additional magnetic flux from the heating coil increases the magnetic flux leaking from the heating coil (rate of leakage of the magnetic flux is unchanged ), which leads to an increase in self-heating of the heat distributing plate.

Then, the induction heater according to the sixth embodiment according to this disclosure solves the problem with the conventional induction heater described above, and provides the induction heater having improved heating coil cooling and easy to use.

The induction heater according to the sixth embodiment according to this disclosure, the cover plate on which the object to be heated is turned off, a plurality of Heizspuleneinheiten which are arranged under the cover plate to heat the object to be heated by induction, a base on which the Heizspuleneinheit means the compression coil spring (preload portion) is installed as a biasing means, and a cooling device that generates the cooling air. The compression coil spring has a first seat coil sandwiched between the heating coil unit and a non-conductive mounting portion and a second seat coil fixed to the base, and is constructed to press the heating coil unit against the cover plate as well as to remove the heat from the heating coil unit Distribute heating coil unit with the cooling air from the cooling device.

In the induction heater according to the sixth embodiment constructed as described above, the leaking magnetic flux can not form the eddy current on the compression coil spring, and the compression coil spring does not undergo self-heating because the compression coil spring (bias portion) as the biasing device is linear and not loop-shaped (annular).

The compression coil spring (biasing portion) as the biasing means works like the heat distributing rib, which dissipates the heat by the loss of the heating coil unit by means of the first seat coil of the compression coil spring. Since the cooling air from the cooling device cools the heating coil unit and the compression coil spring, a temperature rise of the heating coil unit can be suppressed.

On the other hand, because the compression coil spring is constructed to press the heating coil unit against the cover plate, no space is caused between the heating coil unit and the object to be heated. Since it is therefore not necessary to set an additional magnetic flux in the heating coil unit, which takes into account such a space, the heating coil unit can be composed compact.

In the induction heater according to the sixth embodiment according to this disclosure, the enhanced cooling capacity of the heating coil unit can be achieved because the compression coil spring functions unimpaired by the leakage magnetic flux as the heat-dispersing rib.

An example of the induction heater according to the sixth embodiment according to this disclosure will be described in detail with reference to the accompanying drawings.

The 23 FIG. 14 is a cross-sectional view of main parts of the configuration of the induction heater according to the sixth embodiment. FIG. The 24 FIG. 15 is a cross-sectional view of an enlargement of main portions of the induction heater according to the sixth embodiment. FIG. The 25 FIG. 15 is a perspective view enlarging a part of the heating coil unit, the compression coil spring, etc., in the induction heater according to the sixth embodiment. FIG. The 26 FIG. 15 is a perspective view of the induction heater according to the sixth embodiment. FIG. The 27 is a perspective view of the induction heater according to the sixth embodiment with the cover plate removed. The 28 Fig. 12 is a plan cross-sectional view of a main part of the construction of the induction heater according to the sixth embodiment, wherein the heating coil unit has been removed.

As in the 23 to 28 shown is a cover plate 201 a plate, an object to be heated 202 as the cooking container, such as a pot, and a cast iron plate can be turned off, and by the upper surface of the main body housing 203 through the cover plate 201 can be an internal structure of the main body housing 203 be recorded.

In the main body case 203 are an operation display section 204 by overlapping a touch panel over a liquid crystal display unit, 45 heating coil units 205 in a grid state (five rows in the front / rear direction, nine rows in the right / left direction), a flat base 206 or base plate 206 a heating control section 207 controlling an inverter circuit to the heating coil unit 205 to drive, a detection section 208 for the object to be heated, the presence or absence of the object 202 To be heated, on the cover plate 201 detected based on a current flowing through the inverter circuit, and includes a microcomputer that executes a program to the operation, etc., of the heating control section 207 and the detection unit 208 for the object to be heated.

The inverter circuit and those in the inside of the main body housing 203 are not included in the above as described above 23 to 27 shown.

The heating control unit 205 contains a heating coil base 210 , which is made of a non-conductive material, in which Ferit 209 is installed, a heating coil 211 containing a copper wire wound up, mica sheets 212 and 213 , etc.

In the interior of the main body case 203 are a light-emitting display unit 226 passing through four heating coil units 205 is surrounded on the front side, the back side, the right side and the left side, a light-emitting part (light guiding unit) 225 between two adjacent heating coil units 205 is arranged, a compression coil spring 214 as a biasing portion under each heating coil unit 205 is arranged, a cooling device (cooling section) 219 , which is the interior of the main body casing 203 cools, arranged.

Four light-emitting parts (light guide unit) 225 are to every light-emitting display unit 226 connected. The light-emitting display unit 226 is with an LED on each connector with the light-emitting part 225 fitted. The light from the LED in the light-emitting display unit 226 is arranged, passes through the light guide unit and is upward from the light emitting part 225 by means of the cover plate 1 radiated.

The compression coil spring 214 as the biasing portion becomes with a first seat winding 215 as a coil end on the cover plate side (upper side) between the bottom of the heating coil unit 205 and a circular planar-shaped mounting portion 216 , which is made of a non-electrically conductive material, held so that the wire surface of the first seat coil 215 will make a surface contact with it. A second seat turn 217 as the other (lower side) coil end of the compression coil spring 214 is at the base 206 by means of a fixing metal 218 established. A thermally conductive material (not shown) is between the underside of the heating coil unit 205 and the mounting section 216 that's the first seat wrap 215 the compression coil spring 214 holds, filled. Therefore, it is arranged so that the heat is rapidly below the lower surface of the heating coil unit 205 , the first seat winding 215 the compression coil spring 214 and the mounting section 216 is managed or distributed.

The cooling device (cooling section) 219 contains a blower wheel 220 and a line 221 and blows the cooling air in the direction of the multiple heating coil units 205 which are arranged in the grid structure, in particular in the direction of the compression coil grid 214 as the biasing portion, which is the heating coil unit 205 against the cover plate 201 suppressed.

As in 28 shown are an air intake opening 222 to apply air from the outside, and an exhaust port 223 to discharge the cooling air after cooling to the outside, in the bottom surface of the main body case 203 arranged. The inside of the main body case 203 is constructed such that the cooling air passing through the bottom of the main body housing 203 through the cooling device (cooling section) 219 is introduced, flows from the front side to the rear side to the underside of the plurality of Heizspuleneinheiten 205 and the compression coil springs 214 safe to cool, and is through the exhaust or exhaust port ( 223 ) at the bottom of the main body housing 203 blown out. In 28 the flow of cooling air is indicated by an arrow.

The temperature sensor 224 , the temperature of the object to be heated 202 , such as the pot, measures by light is in the center of the lower surface of the heating coil unit 205 disposed and is disposed in the passage of the cooling air.

In the induction heater according to the sixth embodiment, the operation display unit is 204 and the light emitting display unit 225 as described in relation to the above-described embodiment, designed to pass through the cover plate 1 to be seen from above.

The operation and effect of the induction heater according to the sixth embodiment constructed as above will now be described. The 29 FIG. 12 is a block diagram of controls in the induction heater according to the sixth embodiment. FIG.

As in 29 is shown, when the induction heater by the cooking start operation on the operation display section 204 is started by the user, the start signal to the heating control section 207 from the operation display section 204 entered. The heating control section 207 causes the detection section 208 for the object to be heated, when the start signal is input, to perform a detection operation to detect which heater coil unit 205 if necessary, the object 202 To be heated has been turned off.

The heating control section 207 causes the detection section when the start signal is input 208 for the object to be heated, to perform an operation for detection, at each heating coil unit 205 to detect if the object to be heated 202 has been parked or placed.

The detection operation is performed by supplying a detection current to the heating coil 211 in each heating coil unit 205 performed, and the presence or absence of the object to be heated is detected by changing the detection current.

When the object to be heated 202 on the cover plate 201 is placed and at the position substantially above the heating coil unit 205 is arranged, gives the detection section 208 for the object to be heated based on the detection current of the heating coil unit 205 a detection signal as a result of the detection to the heating control section 207 out.

When the detection section 208 for the object to be heated, the parking of the object to be heated 202 on the cover plate 201 includes, energizes the heating control section 207 the insertable heating coil unit 205 in which the light-emitting display unit 226 arranged LED is caused to illuminate, and the light-emitting portion (light guide unit) 225 around the heating coil unit 205 is caused to emit light.

At the same time, the heating control section controls 207 the fan impeller 220 and causes it to air from the outside through the Air inlet opening 222 and introduce the cooling air from the front of the heating coil units 205 , which are arranged in the lattice state, by means of the guide 221 blow.

The magnetic field is through the heating coil 211 the energized or driven Heizspuleneinheit 205 generated. The magnetic flux coming from the upper side of the heating coil 211 is generated, generates the eddy current on the bottom of the object 222 which is to heat, being the object to be heated 202 itself heated (Joule heat), and the temperature rises.

Then the temperature sensor detects 224 pre-constant or constant, the bottom temperature of the object to be heated 202 and a detection signal becomes as a result of the detection in the heating control section 207 entered. The heating control section 207 controls the heating of the object to be heated 202 to a predetermined temperature by the input of the heating coil unit 205 is set, depending on the detection signal from the temperature sensor 224 ,

On the other hand, the bottom of the heating coil 211 Magnetic flux generated largely by the ferrite 209 that under the heating coil 211 is disposed, but with a certain leakage of the magnetic flux is unavoidable.

Because the compression coil spring 214 linear and non-looped, the leaking magnetic flux can over the compression coil spring 214 do not form an eddy current and the compression coil spring 214 is not subject to self-heating.

The first seat winding 215 the compression coil spring 214 is between the bottom of the heating coil unit 205 and the mounting section 216 held, so that the wire surface of the first seat winding 215 will make surface contact thereto and thus the heat transfer area is ensured. In particular, the underside of the heating coil unit 205 and the mounting section 216 make surface contact with each other, forming a large heat transfer surface, and these parts, each using a thermally conductive material, are thermally and fused or mechanically coupled. For this reason, an excellent heat conducting path between the heating coil unit 205 and the mounting section 216 built up.

As a result, the loss in the Heizspuleneinheit 205 Heat generated efficiently from the lower surface of the heating coil unit 205 directly to the first seat winding 215 the compression coil spring 214 directed, and in addition from the bottom of the heating coil unit 205 to the first seat winding 215 over the flat surface of the mounting section 216 directed. For this reason, the construction of the sixth embodiment works with the compression coil spring 214 as the biasing means sufficient as the heat dissipating or heat-dissipating rib.

The construction according to the sixth embodiment is arranged such that the cooling air through the fan impeller 220 entering the outside air through the air inlet opening 222 introduces, flows through the line or guide 221 to the heating coil units 205 which are arranged in the lattice structure, and in particular in the direction of the compression coil spring 214 under the heating coil unit 205 blown. As a result, since the induction heater according to the sixth embodiment is constructed to surround the underside of the heating coil unit 205 and the compression coil spring 214 To cool, the temperature rise of the heating coil unit 205 be avoided with certainty.

Therefore, the measures in the induction heater according to the sixth embodiment become unnecessary, such as the control for throttling the input to the heating coil unit 205 to prevent the abnormal temperature increase and the controller to increase the number of rotations of the fan impeller 220 to increase the amount of air supplied. In the sixth embodiment, this makes it possible to enhance the cooling capacity for the heating coil and to provide an induction heater which is easy to use.

In the induction heater according to the sixth embodiment, the compression coil spring 214 the heating coil unit 205 against the cover plate 201 presses, no space or distance between the Heizspuleneinheit 205 and the object to be heated 202 caused, and therefore it is not necessary to set an additional magnetic flux, which takes into account the space or gap. As a result, the heating coil unit 205 compact and, as a result, the smaller size and smaller thickness of the induction heater can be realized.

As further in 28 is shown, the cooling air flows in the induction heater according to the sixth embodiment of the guide 221 through the cooling device 219 after it blows the light-emitting display unit 226 that hits through the heating coil unit 205 is surrounded along the sidewall surface of the light-emitting display unit 226 and flows concentrated toward the center of the lower surface of the heating coil unit 205 ,

The light-emitting display unit 226 Namely, it also functions as a guide portion (guide body) that supplies the cooling air from the cooling device 219 leads in a desired direction. Namely, because of the arrangement of the light-emitting display unit 226 become the bottom of the heating coil unit 205 and the compression coil spring 214 cooled with certainty and the cooling air is prevented from being useless in the room by the several heating coil units 5 is surrounded, to flow.

In addition, the induction heater according to the sixth embodiment is constructed such that the cooling air that is converged toward the center of the lower surface of the heating coil unit 205 flows, the temperature sensor 224 which is located at the center of the heating coil, will hit, with their current being disturbed. As a result, in the configuration of the induction heater according to the sixth embodiment, the heat conduction efficiency is enhanced, and at this time, the efficiency of cooling is enhanced. As a result, the cooling air cools the underside of the heating coil unit 205 and the compression coil spring 214 efficient, and therefore the downsizing of the cooling device can be achieved.

In the construction of the induction heater according to the sixth embodiment, it is so in the main body case 203 designed that the cooling air from the cooling device 219 concentrated in the direction of the center of the bottom of each heating coil unit 205 with regard to all of the plurality of heating coil units 205 flows, which are arranged in the front-to-rear direction from the wind side to the windward side, and passes through the exhaust port 223 blown out.

While the present invention has been described in some detail in each of the embodiments, the disclosed contents of this embodiment may vary in details of construction, and any changes in combinations of components or orders in each embodiment may be achieved without departing from the scope of the claims or to abandon the idea of the present invention.

Industrial Applicability

The present disclosure demonstrates the induction heater, which is easy to use and highly reliable, which can be used for various applications that perform induction heating, such as induction cookers, for example, and can provide commodity value.

LIST OF REFERENCE NUMBERS

1

Main body case

2

heating coil

3

light-emitting display unit

4

slide guide

5

Operation display section

6

cover plate

7

object to be heated

8th

light-emitting device

9

light-emitting display housing

10

cross-shaped opening portion

11

Compression coil spring (preload section)

12

diaphragm plate

13

heating coil

14

Heizspulengehäuse

15

optical sensor

16

colored layer

16a

translucent layer

16b, 16c

light-shielding layer

17

Thermal insulation material

18

convex section

19

Main body base

20

Holding section of the optical sensor

21

Detection section for object to be heated

22

heating control

23

light-emitting display unit

24

light-emitting display housing

25

Light guide unit

26

Light guide section

27

light-guiding holding section

28

light-carrying support section or support section

29

slide guide

Claims (42)

An induction heater comprising: a cover plate on which an object to be heated is placed; a plurality of heating coil units disposed immediately under the cover plate and containing heating coils that heat the object to be heated placed on the cover plate by means of induction; a light-emitting display unit disposed around each of the heating coil units for radiating light visible through the cover plate; a detection or Object to be heated detecting the placement of the object to be heated over the heating coil units; a heating control section that controls an operation state of each of the heating coil units and a light emitting state of the light emitting display unit based on a result of the detection by the object to be heated detection section; and a biasing portion that presses the heating coil unit against the lower surface of the cover plate, the light emitting display unit comprising: a light emitting display case disposed within a space surrounded by at least the heating coil units arranged side by side is; a light emitting device as a light emitting source disposed inside the light emitting display case; and a light guide unit disposed so as to connect the adjacent light-emitting display housings and having an upper surface opposite to the cover plate is caused to radiate light from the light-emitting device by means of the light, the heating coil units in planar, horizontal rows and columns are disposed immediately under the cover plate, wherein the heating control section is configured to detect a Heizspuleneinheit to induction heating the object to be heated, which is placed on the cover plate, based on the results of detection by the object to be heated and at least some of the light-emitting display units arranged around the identified heating coil unit to emit light to indicate a heating area, and the outer surface of the light-conducting is arranged in contact with the heating coil unit and is constructed to control the vibration direction of the heating coil unit by the biasing section in a predetermined direction. An induction heater according to claim 1, wherein the light-emitting display units emit light in a dotted state around the heating coil unit, and a region surrounded by the light-emitting light-emitting display units is treated as the heating region. An induction heater according to any one of claims 1 or 2, wherein the heating control section is constructed so that when the object to be heated is placed on the cover plate, the light emitting display unit emits light to move the heating area at least at the position of the apex To indicate the tip of a rectangular frame body. An induction heater according to any one of claims 1 to 3, wherein each of the light emitting display units further comprises: a membrane plate disposed on the top surface opposite to the top plate in the light emitting display case, and having a light emitting portion that shines in the dotted state, irradiated by the light from the light emitting device, after passing through the wall surface inside of the light emitting element Display housing has been reflected. An induction heater according to claim 1, wherein the light-emitting display units are constructed to radiate light in a linear state around the heating coil unit. An induction heater according to claim 5, wherein the heating control section is configured such that when the object to be heated is placed on the cover plate, the light emitting display units emit light to indicate the heating area at least at the position of a rectangular frame body. An induction heater according to any one of claims 1 to 6, wherein the heating control section is constructed to display the light-emitting state of the light-emitting display unit indicating the heated area depending on the temperature of the object to be heated placed on the cover plate. An induction heater according to any one of claims 1 to 7, further comprising: a sliding guide portion disposed around the heating coil unit and having a sliding guide surface in contact with the heating coil unit for controlling a vibration direction of the heating coil unit through the biasing section in a predetermined direction. An induction heater according to claim 8, wherein the sliding guide surface of the sliding guide portion is disposed in contact with the outer peripheral surface of the heating coil unit and adapted to control the vibration direction of the heating coil unit in the same direction as that of the pressure by the biasing or Preload section against the cover plate. An induction heater according to claim 9, wherein said sliding guide portion is formed on each of said light emitting display units. An induction heater according to claim 10, wherein the light emitting display unit is constructed to detect light in the dotted line State around the heating coil unit, and wherein the area surrounded by the light emission from the light emitting display unit is treated as the heated area. An induction heater according to claim 11, wherein each of the light-emitting display units further comprises: a membrane plate disposed on the top surface opposite to the top plate in the light emitting display case, and having a light emitting area that shines in the dotted state by the light from the light emitting device after it has been reflected by the wall surface inside of the light emitting display case is illuminated, wherein the sliding guide portion has the surface in contact with the heating coil unit in the light emitting display case configured as the sliding guide surface. An induction heater according to claim 12, wherein the sliding guide portion has a shape corresponding to a plurality of ribs extending in the direction of the heating coil unit, wherein ends of the rib-shaped extensions serve as the sliding guide surface, and wherein the sliding guide portion is extended in the same direction as that of the pressure against the cover plate by the biasing portion in the light emitting display case. An induction heater according to claim 10, wherein the light emitting display unit is configured to radiate light in a linear state around the heating coil unit, and wherein the area surrounded by the light emission from the light emitting display unit is treated as the heated area. The induction heater according to claim 14, wherein the sliding guide portion has the surface in contact with the heating coil unit in the light guide unit configured as the sliding guide surface. An induction heater according to claim 15, wherein the sliding guide portion has a function as a light-shielding body to shield the light from the light-guiding unit, wherein the contact surface to the heating coil unit in the sliding guide portion serves as the sliding guide surface, and wherein the sliding guide portion is extended in the same direction as that of the pressing by the biasing portion against the cover plate. An induction heater according to any one of claims 1 to 16, further comprising: an operation display section provided under the cover plate; and a proximity sensor that detects the proximity of an object to the operation display section, wherein the heating amount of the heating coil unit is controlled when the proximity sensor detects the proximity of the object to the operation display section. The induction heater according to claim 17, wherein the operation display section is configured to also serve as the proximity sensor. The induction heater according to claim 17, wherein the proximity sensor is integrally formed with the operation display portion. The induction heater according to claim 17, wherein the proximity sensor is disposed in the region between the operation display portion and the adjacent heating coils. The induction heater according to claim 17, wherein when the proximity sensor detects the proximity of the object to the operation display section, the proximity of the object is displayed on the operation display section. The induction heater according to claim 17, wherein the proximity sensor includes the touch panel disposed near the underside of the cover plate. An induction heater according to claim 17, wherein the proximity sensor is an electrostatic electrode disposed on the underside of the cover plate. The induction heater of claim 17, wherein the proximity sensor includes an electrostatic electrode printed on the underside of the cover plate. The induction heater of claim 17, wherein the proximity sensor is an infrared sensor that detects the proximity of a heated object. An induction heater according to claim 17, wherein the proximity sensor is a temperature sensor. The induction heater according to claim 26, wherein when the temperature sensor detects a temperature higher than a threshold temperature allowed for the operation display section, the heating amount of the heating coil is controlled. An induction heater according to claim 17, wherein the proximity sensor is a piezoelectric element which detects a pressure by the object placed on the cover plate. The induction heater according to claim 17, wherein when the proximity sensor detects the proximity of the object while heating the heating coil adjacent to the operation display portion, the heat quantity of the adjacent heating coil is controlled. An induction heater according to claim 17, further comprising: a cooling device that cools the operation display portion, wherein When the proximity sensor detects the proximity of the object, the cooling capacity of the cooling device is increased. The induction heater according to claim 30, wherein when the proximity sensor detects the proximity of the object while heating the heating coil adjacent to the operation display portion, the cooling capability of the cooling device is increased. The induction heater according to claim 30, wherein when the proximity sensor is a temperature sensor and the temperature sensor detects a temperature higher than a threshold temperature allowed for the operation display section, the cooling capability of the cooling device is increased. An induction heater according to claim 17, wherein the operation display section is formed by overlapping an operation section via a liquid crystal display section. An induction heater according to claim 33, wherein said operation portion includes a touch panel disposed above said liquid crystal display portion. An induction heater according to claim 33, wherein the operation portion is an electrostatic electrode disposed on the underside of the cover plate. An induction heater according to claim 33, wherein the operating portion includes an electrostatic electrode printed on the underside of the cover plate. An induction heating apparatus according to claim 17, wherein when the proximity sensor detects continuously or sequentially the approximation of the object to the operation display section over a predetermined period of time, the proximity of the object is displayed on the operation display section. An induction heater according to claim 17, wherein the heating coil comprises a plurality of heating coils. An induction heater according to any one of claims 1 to 38, comprising: a base on which the heating coil unit is mounted by means of the biasing section; and a cooling device that generates a cooling air, wherein the preload portion has a first seat coil held between the heating coil unit and a non-electrically conductive mounting portion, and a second seat coil disposed to the base and constructed to urge the heating coil unit against the cover plate, as well as Heat to distribute the heating coil unit by the cooling air from the cooling device or dissipate. An induction heater according to claim 39, wherein a heat conductive material is filled between the bottom of the heating coil unit and the mounting portion holding the first seat coil. An induction heater according to any one of claims 39 and 40, wherein the light emitting display unit is constructed as a cooling air guide body by disposing, within a space surrounded by the heating coil units, the light emitting display unit so as to constrict the space , The induction heater of claim 39, wherein the mounting portion is a planar portion and configured to make surface contact with the underside of the heating coil unit.

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