JP5035260B2 - Built-in cooking device - Google Patents

Description

  The present invention relates to a built-in heating cooker for a kitchen table equipped with an electric heater or an electromagnetic heating device used in a general home.

  Conventionally, this type of built-in cooking device cools a heating coil, an oscillation transistor, and a circuit board inside a main body using a fan motor (for example, refer to Patent Document 1).

FIG. 7 shows a conventional built-in induction heating cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 7, the built-in electromagnetic induction heating cooker body 1 dropped into the upper surface opening of the sink 2 includes a heating coil 3, a circuit board 4 including an oscillation transistor and many electronic components, The upper surface of the main body 1 is covered with a plate 6. Furthermore, it is comprised from the operation part 7, the inlet port 8 for cooling, and the cooling case 10 which has a duct shape. The fan motor 5 is configured to suck outside air from an intake port 8 provided on the same surface as the operation unit 7, cool the circuit board 4 and the like, and then discharge air from an exhaust port 9 provided behind the plate 6. Yes.
JP 2001-76857 A

  However, in the conventional configuration, the air blown from the fan motor 5 flows from the front to the rear of the main body 1. However, in the axial flow fan (fan motor) that blows from the front to the rear, Since it is blown in the direction, it becomes difficult to cool the roaster that cooks the fish on the side, the heating coil 3 and the operation part on the upper part, etc., and it has the problem that the noise increases because it increases the air volume and cools It was.

The present invention solves the above-mentioned conventional problems, and can blow air not only to the circuit board but also to the roaster section and the heating coil, and can cool the inside of the main body efficiently and can operate with low noise. In addition, the built-in cooking device can improve the pressure performance and stably blow the cooling air even if the intake load changes due to the operation of the intake port around the movable operation panel. The purpose is to do.

In order to solve the above-described conventional problems, the built-in heating cooker of the present invention includes a main body having a top plate on which an object to be heated is placed, and heating means disposed at the bottom of the top plate in the main body, A control circuit for controlling the heating means; an operation unit for operating the heating means; an intake port provided on the front surface of the main body for sucking outside air into the main body; and an air blowing means for cooling the inside of the main body by the air sucked from the intake port And an exhaust port for discharging the air blown by the blower means from the inside of the main body, the blower means has an impeller provided with blades between the main plate and the shroud plate, and is viewed from a side. The outer peripheral end of the blade is an oblique flow type blower in which the outer peripheral end is inclined with respect to the rotation axis so that the extended line of the outer peripheral end of the blade and the rotation shaft intersect at an angle of about 45 ° on the outlet side . Provide multiple air flow paths on the outlet side to each part of the main body With a structure for guiding 却風, the operation unit is arranged in movable control panel to open and close pivoting on the front body, in which a gap around the movable operating panel has a configuration in which the said air inlet.

  As a result, air is blown in a wide-angle direction obliquely from the front corner of the main body toward the inside of the main body, so that air can be blown in the direction of the roaster and heating coil as well as the circuit board. The inside can be cooled and the pressure performance is improved by providing an intermediate blade on the impeller, so even if the intake load changes due to the operation of the intake port around the movable operation panel, the cooling air can be stably supplied. Can blow.

  The built-in heating cooker of the present invention blows cooling air in the direction of each cooling part by a mixed flow blower without changing the specifications such as the external dimensions of the main body, so that the circuit board as well as the side Wind can be blown without waste to a certain roaster section, upper heating coil, and operation section, the inside of the main body can be cooled with a small amount of air flow, low noise operation sound can be achieved, and pressure performance Even if the intake load changes due to the operation of the intake port around the movable operation panel, the cooling air can be stably blown.

According to a first aspect of the present invention, there is provided a main body having a top plate on which an object to be heated is placed, a heating means disposed in the lower part of the top plate within the main body, a control circuit for controlling the heating means, and the heating means. An operation unit to be operated, an intake port provided on the front surface of the main body for sucking outside air into the main body, a blowing means for cooling the inside of the main body by the air sucked from the intake port, and air blown by the blowing means is discharged from the main body The blower means has an impeller having blades provided between the main plate and the shroud plate, and an extension line of the outer peripheral end of the blades and the rotating shaft are blown out when viewed from the side. The outer peripheral end is inclined with respect to the rotation axis so as to intersect at an angle of approximately 45 ° on the side, and a plurality of air flow paths are provided on the outlet side of the mixed flow fan to each part of the main body. The structure is configured to guide cooling air, and the operation unit is a main body. Each cooling part is arranged on the movable operation panel that opens and closes on the surface, and the gap around the movable operation panel is used as the inlet, so that each cooling part can be changed without changing the specifications such as the external dimensions of the main body. The air can be blown to the roaster section on the side, the upper heating coil, and the operation section as well as the circuit board as well as the circuit board. Cooling and quiet operation noise can be achieved. Impeller pressure is improved by providing an intermediate vane on the impeller, and intake load changes depending on the operation of the intake port around the movable operation panel. Even so, the cooling air can be blown stably.

In the second invention, in particular, the impeller of the mixed flow type blower of the first invention includes a main wing and an intermediate wing, and the intermediate wing is provided in a range from the inner diameter to the outer diameter of the shroud of the impeller. Thus, the entrance interval of the intermediate blades can be widened, and the effect of the flow guide blades can be exhibited without obstructing the flow between the main blades.

In the third invention, in particular, the inner wing side of the intermediate wing of the second invention is started from a position about twice the inner diameter of the main wing. The distance between the blades can be equal, and the intermediate blade can be installed while suppressing the narrowing of the distance between the blades due to the provision of the intermediate blade.

In the fourth invention, in particular, the impeller of the mixed flow fan according to the first invention includes a main wing and an intermediate wing, and the intermediate wing is arranged at a position advanced in the rotational direction from the center between the main wings. As a result, flow vortices generated on the negative pressure side of the main wing can be reduced, and noise can be reduced.

  In the fifth aspect of the invention, in particular, the airflow resistance of the intake port according to any one of the first to fourth aspects of the invention is configured to vary depending on the operation of the movable operation panel. Even if the intake load is changed by the above, the mixed flow fan provided with the intermediate blade having high pressure performance can stably blow the cooling air.

In the sixth aspect of the invention, in particular, the purification filter has oil smoke by providing a rectifying means having a purification filter function between the intake port of any one of the first to fifth aspects and the mixed flow blower. Even if the draft resistance increases, the mixed flow fan provided with the intermediate blade having high pressure performance can stably blow the cooling air.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a side sectional view of a built-in heating cooker according to the first embodiment of the present invention, and FIG. 2 is a front sectional view of the built-in heating cooking apparatus according to the first embodiment of the present invention. It is.

  In FIG. 1, the built-in heating cooker in the present embodiment is arranged at a lower part of the top plate 12 within the main body 13 and a main body 13 having a top plate 12 on which an object to be heated 11 such as a pan or a frying pan is placed. The heating coil 14 serving as the electromagnetic induction heating means, the control circuit 15 for controlling the heating coil 14, and the operation installed on the front panel 12 of the main body 13 and installed on the movable operation panel 16 that opens and closes and rotates. Part 17.

  And it was set as the structure provided with the mixed flow type air blower 20 as a ventilation means which suck | inhales external air in the main body 13 from the inlet ports 18 and 19 provided in the periphery of the said movable operation panel 16. FIG.

  Then, the air sucked from the intake ports 18 and 19 cools the heating coil 14, the control circuit 15, the top panel operation unit 21, the main body periphery 22, and the like disposed in the main body 13, and the exhaust provided in the left rear part of the main body 13. It was set as the structure discharged | emitted from the opening | mouth 23. FIG.

  In addition, a motor 24 for driving the mixed flow fan, an impeller 25 of the mixed flow fan, a cylindrical bell mouth portion 26 of the mixed flow fan, and a plurality of outlets connected to the outlet of the mixed flow fan. It is comprised with the ventilation flow path 27. FIG.

Moreover, the thin broken line arrow in a figure shows the flow of a wind. Further, a hub plate 28 that is a main plate of the impeller, an intermediate blade 29 of the impeller, a main wing 30 of the impeller, and a shroud plate (wind guide plate) 3 of the impeller 3
1. It is composed of a rectangular duct portion 32.

  About the built-in heating cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The object to be heated 11 with the food to be cooked is placed on the top 12, the control circuit 15 is driven by the operation of the operation unit 17, and the heating coil 14 is energized.

  Thereby, the heating coil 14 heats the article 11 to be heated by electromagnetic induction. And when desired heating is complete | finished, the operation part 17 is operated or the heating of the to-be-heated object 11 by the heating coil 14 is automatically stopped by the control circuit 15.

  Since the heating coil 14 and the control circuit 15 generate heat while the heating coil 14 is being driven, the mixed flow fan 20 is driven to blow wind for cooling.

  The mixed flow type blower 20 sucks air from the inlets 18 and 19 around the movable operation panel 16, and controls the downstream control circuit 15, the heating coil 14 and the top panel operation unit 21 located above, The wall surfaces around the roaster portion 38 (FIG. 2) and the body periphery 22 (FIG. 2) are cooled.

  In addition, the air that has cooled the heat generating portion is collected in the exhaust port 23 located on the upper left surface of the rear portion of the main body 13 through the air flow path and exhausted upward in the room.

  Here, the shape of the impeller of the mixed flow fan 20 will be described.

  FIG. 3 is a side sectional view of a mixed flow fan used in the built-in heating cooker according to the first embodiment of the present invention.

  In FIG. 3, the impeller 25 of the mixed flow blower 20 rotates by attaching an intermediate blade 29 and a main blade 30 as blades to a space sandwiched between a hub plate 28 and a shroud plate 31 which are main plates having a conical slope. To do.

  And the shroud board 31 of the impeller 25 was set as the structure which bent the outermost peripheral part 33 so that it might become concave on the blade | wing side.

  In addition, the outer peripheral edge 34 of the blade is configured to be directed obliquely at a predetermined angle with respect to the rotation shaft 35.

  With such a configuration, the effective outer diameter of the impeller 25 can be increased, and the air blowing performance of the impeller having a large outer diameter can be achieved even in a limited space for incorporation in the built-in heating cooker. Can be obtained.

  In addition, since the flow in the impeller can be changed in an oblique direction without deflecting the flow in the flow path, air can be smoothly blown to the substrate of the control circuit 15 disposed on the downstream side, and Since the air can be blown also in the direction, the air can be smoothly blown into the air flow path connected to the air outlet 36 opened to the side of the duct portion 32 of the casing.

  Further, the casing of the mixed flow fan 20 includes a cylindrical bell mouth portion 26 provided with a circular hole on the suction side, and a duct portion provided with a plurality of blowing holes connected to the substantially rectangular air flow passage 27 on the blow-out side. 32.

  The air distribution in the casing can be changed from a round shape to a square shape so that air can be smoothly sucked into the rotating impeller 25 from the bell mouth portion 26 and smoothly blown to the square parts such as the control circuit on the discharge side. Because it can be deflected in a small space, it can also be built into narrow space equipment with built-in heating cookers.

  Moreover, since the discharge direction from the impeller 25 is inclined, air can be smoothly distributed to a plurality of air flow paths having different right-angle directions.

  For example, if the air is blown in parallel to the air flow path, it is difficult to flow in the air flow path in the 90 ° direction, but in the mixed flow type blower, the air flow is discharged in an oblique direction to the air flow path. The vertical flow path can also distribute air.

  Therefore, air can be flowed to the air flow path 27 including the control circuit board in the horizontal direction as in the built-in heating cooker and also to the air flow path 27 to the heating coil 14 that needs to flow in the vertical direction.

  Furthermore, the cooling air of the top-panel operation part 21 can also be blown from the blower outlet 36 opened to the duct part side of the casing. In particular, when the angle is in the range of 45 ° ± 20 °, both the vertical direction and the horizontal direction can flow easily, and it is suitable as a cooling fan built in the built-in heating cooker.

  And the blowing of the air of the mixed flow type blower 20 has the characteristic that it blows in the diagonal direction by flowing through the space sandwiched between the shroud plate 31 and the hub plate 28 of the impeller 25.

  Since air can be blown over a wide range using this obliquely blown flow, not only the downstream control circuit 15 (board and components) but also the heating coil 14 and the top panel operating unit 21 above are blown. The wind can be blown using the road, and the inside of the main body can be effectively cooled.

  As a result, since cooling can be performed with a limited amount of air, the rotational speed of the impeller can be kept low, and a low noise driving sound can be obtained.

  Moreover, since the fluid noise generated at the time of blowing is insulated by the blowing passage, it can be further reduced.

Further, by arranging the nonwoven fabric filter 37 as a rectifying means having a rectifying function and a purification filter function on the upstream side of the intake port of the mixed flow blower 20, the flow on the suction side can be made uniform, and the mixed flow The flow of the mold blower 20 can be made efficient.

  And since the nonwoven fabric filter 37 has the function of purifying air, it can remove the vapor | steam and oil smoke which generate | occur | produce during cooking with a nonwoven fabric, and vapor | steam and oil smoke are electronic components, such as a control circuit, and a mixed flow type blower. It can be prevented from adversely affecting.

Furthermore, even if the non-woven fabric filter 37 provided between the air inlet and the mixed flow fan increases the ventilation resistance due to oil smoke, the mixed flow fan provided with the intermediate blade 29 with high pressure performance stably blows cooling air. can do.

  FIG. 4 shows a performance characteristic diagram of the mixed flow type blower used in the built-in heating cooker according to the first embodiment of the present invention, and shows flow rate and pressure characteristics.

  In FIG. 4, the solid line characteristic with the intermediate blade shows a higher pressure characteristic near the center. As a result, the air volume at the time of normal ventilation resistance is the air volume Q1 from the intersection 1 with the load 1, and the air volume when the ventilation resistance is increased is the intersection 2 with the load 2 (with intermediate wings) and the intersection 3 (intermediate) No airfoil), and air volume Q2 and air volume Q3, respectively.

  As is apparent from the characteristic diagram, it can be seen that the air volume Q2 with the intermediate blade having high pressure performance is larger than the air volume Q3 without the intermediate blade, and a large air volume can be obtained even if the ventilation resistance is increased.

  FIG. 5 shows a cross-sectional view of a mixed flow blower used in the built-in heating cooker according to the first embodiment of the present invention.

  In FIG. 5, the intermediate blade 29 of the mixed flow blower 20 can be improved in pressure performance by being arranged in a rotational direction from the center 39 between the main blades 30, and the flow generated on the negative pressure side of the main blade 30. The generation of vortices can be suppressed and noise reduction can be achieved.

  As a result, in the case of a device in which the ventilation resistance fluctuates, such as a movement of a movable operation unit such as a built-in heating cooker or a purification filter, the mixed flow type blower 20 provided with an intermediate blade is used to stabilize the device. Both cooling air blowing and low noise can be realized.

  FIG. 6 is a perspective view of the mixed flow fan used in the built-in heating cooker according to the first embodiment of the present invention, and shows the entire impeller 25 of the mixed flow fan 20.

  The intermediate blade 29 of the mixed flow blower 20 is provided in the range 41 from the inner diameter 40 to the outer diameter of the shroud plate 31 of the impeller, so that the entrance interval 42 of the intermediate blade 29 can be widened, and the main blade The effect of the flow guide vanes can be exhibited without impeding the flow between the 30.

  For example, even if the inner diameter of the intermediate wing 29 starts from a position that is approximately twice the inner diameter of the main wing 30, the entrance interval 43 of the main wing 30 and the entrance interval 42 of the intermediate wing 29 are substantially equal. The intermediate blade 29 can be installed while suppressing the narrowing of the distance between the blades due to the provision of the intermediate blade 29.

  In this way, by blowing obliquely with the mixed flow type blower 20, the air is blown to the plurality of air flow paths in both the horizontal air flow path and the vertical air flow path to cool the components. Can do.

  And since it can blow without leaking air in a ventilation flow path, useless air can be suppressed and it can be set as the driving | running sound of a low rotation and a low noise.

  Moreover, when the ventilation resistance fluctuates as in the movement of the movable operation unit as in the built-in heating cooker or in the purification filter, it is desirable to use a high-pressure performance air blowing means.

  By providing the intermediate blade, the pressure performance can be improved, and it can be easily realized because it can be attached to the built-in heating cooker without changing the specifications such as the external dimensions of the main body.

  In addition, although the explanation was made with the configuration in which the mixed flow fan is installed on the right side of the main body, the cooling effect by the mixed flow fan that can blow air over a wide range, not only on the left side, but also in the center installation and both left and right sides, It can be obtained similarly.

As described above, in the present embodiment, the main body having the top plate on which the object to be heated is placed, the heating means arranged in the lower part of the top plate in the main body, and the control circuit for controlling the heating means. And an operating section for operating the heating means, an intake port provided on the front surface of the main body for sucking outside air into the main body, a blower means for cooling the inside of the main body by the air sucked from the intake port, and air blown by the blower means An exhaust port for exhausting air from the inside of the main body, and the air blowing means uses a mixed flow type fan equipped with an intermediate blade, and a plurality of air flow paths are provided on the outlet side of the mixed flow type air blower to each part of the main body. The cooling unit is configured to guide the cooling air, and the operation unit is disposed on a movable operation panel that opens and closes on the front surface of the main body. From the front corner to the inside of the main unit Since the air is blown obliquely toward the wide angle direction, the air can be blown not only to the circuit board but also to the roaster section and the heating coil, so that the inside of the main body can be efficiently cooled and the intermediate blade is attached to the impeller. By providing the pressure performance, the cooling air can be stably blown even if the intake load changes due to the operation of the intake port around the movable operation panel.

  As described above, the built-in heating cooker according to the present invention uses a mixed flow blower that realizes a flow suitable for blowing air to each cooling component inside the rectangular main body and a plurality of blowing passages to supply air. By guiding, the inside of the main body can be efficiently cooled, and the pressure performance is improved by providing an intermediate blade on the impeller, and even if the intake load changes due to the operation of the intake port around the movable operation panel, it is stable Since the cooling air can be blown and it can be used safely with low noise even in a narrow space, it is effective for a device incorporated in a system kitchen unit or the like that can store the device body.

Side surface sectional drawing of the built-in type heating cooker in Embodiment 1 of this invention Front sectional view of the built-in heating cooker in Embodiment 1 of the present invention Side surface sectional drawing of the mixed flow type fan used for the built-in heating cooker in Embodiment 1 of this invention Performance characteristics diagram of mixed flow type blower used for built-in heating cooker in Embodiment 1 of the present invention Sectional drawing of the mixed flow type fan used for the built-in heating cooker in Embodiment 1 of this invention The perspective view of the mixed flow type blower used for the built-in heating cooker in Embodiment 1 of this invention Side sectional view of a conventional built-in heating cooker

DESCRIPTION OF SYMBOLS 11 To-be-heated object 12 Top plate 13 Main body 14 Heating coil 15 Control circuit 18, 19 Air inlet 20 Diagonal flow type blower (blower means)
23 Exhaust port 25 Impeller 26 Bell mouth part 27 Air flow path 28 Hub plate 29 Intermediate wing 30 Main wing 31 Shroud plate

Claims (6)

A main body having a top plate for placing an object to be heated, a heating means arranged in the lower part of the top plate in the main body, a control circuit for controlling the heating means, an operation unit for operating the heating means, An intake port provided on the front surface of the main body for sucking outside air into the main body, an air blowing means for cooling the inside of the main body by the air sucked from the air intake opening, and an exhaust port for discharging the air blown by the air blowing means from the main body. The air blowing means has an impeller provided with blades between the main plate and the shroud plate, and the extension line of the outer peripheral end of the blades and the rotating shaft as viewed from the side are approximately 45 ° on the outlet side. A mixed flow fan in which the outer peripheral ends are inclined with respect to the rotation axis so as to intersect at an angle, and a structure in which a plurality of air flow paths are provided on the blow-out side of the mixed flow fan to guide cooling air to each part of the main body At the same time, the operation unit opens and closes on the front of the main unit. That is placed on the movable type operation panel, embedded heating cooker gaps around the movable operating panel and to the air inlet. The impeller of the mixed flow type blower comprises a main wing and an intermediate blade, said intermediate wing embedded heating cooker according to claim 1 comprising in the range of outer diameters from the shroud inner diameter of the impeller. The inner diameter of the intermediate wing, embedded heating cooker according to claim 2 where the structure starting from approximately 2 times the position of the inner diameter of the main wing. The impeller of the mixed flow type blower comprises a main wing and an intermediate blade, said intermediate wing built-cooking according to claim 1 disposed in the position advanced in the rotational direction from the center between each of the main wing vessel. The ventilation resistance of the air inlet, embedded heating cooker according configured to claim 1, any one of 4 varies by the operation of the movable operation panel. Wherein between the inlet and the mixed flow fan, embedded heating cooker according to any one of claims 1 to 5 which is configured to include a rectifying means having a cleaning filter function.

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