JP5988880B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

  As a background art of this technical field, there is JP 2012-21696 A (Patent Document 1). In the summary column of this publication, “a storage room provided in the refrigerator main body, a storage room door that opens and closes the front opening of the storage room, an operation unit provided in a planar shape on the front surface of the storage room door, A capacitance type switch electrode provided in contact with or close to the rear of the operation unit; a touch sensor element for detecting a change in capacitance of the switch electrode; and the switch electrode and the touch sensor element. And the wiring is arranged so as to avoid the projected position of the finger when operating the switch electrode.

JP 2012-21696 A

  However, if a pattern shield for protecting electronic components from signal noise, signal delay, etc. is applied to the board, the distance between the touch sensor element on the board and the pattern shield will be close, and there will be a potential difference between the switch electrode and the pattern shield. This increases the possibility that a parasitic capacitance (capacitor) is formed. The circuit in which the charge is accumulated serves as a feedback path for oscillating the circuit, and causes the signal noise or the signal delay.

  In addition, when a pattern shield is applied to a substrate equipped with a noise protection resistor or touch sensor element, it becomes easier to pick up electromagnetic noise between the noise protection resistor and the substrate, that is, the portion where the pattern shield is not applied. The element causes signal noise or signal delay. Patent Document 1 does not fully consider these points.

  Then, an object of this invention is to provide the refrigerator which reduced the influence of the noise and signal delay which are given to a touch sensor element.

The present invention has been made to solve the above-described problems, and includes the configuration described in the claims. As an example, the storage room of the refrigerator body, the storage room door of the storage room, and the storage A door front plate having translucency in front of the door, and a control board behind the door front plate, the control board being provided in contact with or close to the rear surface of the door front plate An electrode, a touch sensor element that detects a change in capacitance of the switch electrode, and a noise protection resistor between the touch sensor element and the switch electrode, and the noise protection resistor from the touch sensor element the pattern shield on the control board in a range including a portion provided, said switch electrode on a surface of the control board, the touch sensor device and to the provision of the noise protection resistor on the back surface of the control board And features.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which reduced the influence of the noise and signal delay which are given to a touch sensor element can be provided.

It is a front view of the refrigerator which concerns on embodiment of this invention. It is a perspective view of the P1 part of FIG. It is a front view of the display part and operation part of FIG. 2a. It is an AA cross-sectional enlarged view of the door shown in FIG. It is a disassembled perspective view of the board | substrate assembly which concerns on embodiment of this invention. It is BB sectional drawing of the board | substrate assembly of FIG. It is an enlarged view of the P2 part of FIG. It is CC sectional drawing of FIG. It is the figure which represented typically the board | substrate operation of the refrigerator shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the refrigerator of this embodiment is demonstrated using FIGS. 1-4. FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention. 2a is a perspective view of the P1 portion of FIG. FIG. 2b is a front view of the display unit and the operation unit of FIG. 2a. 3 is an AA cross-sectional enlarged view of the door shown in FIG. FIG. 4 is an exploded perspective view of the board assembly according to the embodiment of the present invention.

  In FIG. 1, 1 is a refrigerator main body. The refrigerator body 1 has a refrigerator compartment 1a at the top and a freezer compartment 1b at the bottom.

Moreover, the door which opens and closes this front opening is provided in the front opening of each store room. That is, the left refrigerator compartment door 2a and the right refrigerator compartment door 2b are provided in the front opening of the refrigerator compartment 1a, and the freezer compartment door 4 is provided in the front opening of the freezer compartment 1b.
The left refrigerator compartment door 2a and the right refrigerator compartment door 2b are rotatably supported by upper hinges 3 (left hinge 3a, right hinge 3b) provided on the upper part of the refrigerator main body 1, respectively. The freezer compartment door 4 is a drawer-type door and can be drawn out together with the container of the storage compartment. And the left front refrigerator door 2a, the right refrigerator compartment door 2b, and the freezer compartment door 4 are provided with the door front board 6 in the outer surface. The door front plate 6 is composed of a glass plate 6a having optical transparency. In addition, you may comprise not only the glass plate 6 but the resin plate which has a light transmittance, In this case, weight reduction of the refrigerator main body 1 can be achieved.

  The layout of each storage room is not limited to this. For example, any known layout such as a configuration in which a refrigerator compartment is provided below the freezer compartment, a configuration in which three or more storage chambers are provided, and a configuration in which the storage chambers are arranged on the left and right are applicable. Further, the drawer type door and the rotary type door can be applied to any layout of any storage room.

  As shown in FIG. 3, the foam heat insulating material 7 is filled and foamed between the door front plate 6 and the door inner plate 8. A space for storing the first substrate 15 and the second substrate 20 is formed between the door front plate 6 and the substrate storage member 18, and the space is filled with the foam heat insulating material 7. Not. The plate thickness of the glass plate 6a which is the door front plate 6 is 2.0 mm to 3.5 mm in this embodiment. This plate thickness is a dimension that takes into consideration the strength with which the glass plate 6a is not broken or cracked by an impact caused by an external force generated when the refrigerator is assembled, when the refrigerator is transferred, and when the refrigerator is used.

  In addition, the foam heat insulating material 7 is couple | bonded with the door front board 6 and the door inner board 8 which comprise the left refrigerator compartment door 2a by closely_contact | adhering to the back surface of the door front board 6 through the protective film 19a.

  Further, when further strengthening the strength or reducing the plate thickness, the glass plate 6a may be subjected to heat strengthening treatment, chemical strengthening treatment, or the like. The glass plate 6a is an insulator.

  Next, in FIG.1 and FIG.2a, 9 is an operation part on the surface of the door front board 6. FIG. The operation unit 9 is operated by the user from outside to set the cooling temperature of each storage room such as the refrigerating room 1a and the freezing room 1b, rapidly cool the refrigerating room 1a and the freezing room 1b, Or set the size of That is, various functions of the refrigerator can be set by the user operating the operation unit 9 of the door front plate 6.

  Reference numeral 10 denotes an operation information display section of the door front plate 6. The operation information display unit 10 displays the input result from the operation unit 9, the operation state of the refrigerator, and the like outside the refrigerator body 1. As a result, it is possible to confirm the operation performed by the user on the operation unit 9 or to confirm the states of various functions that have already been set.

  The operation unit 9 and the operation information display unit 10 are not a special panel attached to the outside, but the door front plate 6 itself. That is, in this embodiment, the door front plate 6 of the left refrigerator compartment door 2a is provided so as to be flat across the entire outer surface of the left refrigerator compartment door 2a including the operation unit 9 and the operation information display unit 10. ing.

  In other words, the operation unit 9 and the operation information display unit 10 are directly configured on the door front plate 6 which is the glass plate 6a. For this reason, the operation panel which protruded to the front surface comprised with a mechanical switch, a display apparatus, a design member, etc. is abbreviate | omitted conventionally.

  Further, as shown in FIG. 3, a colored paint layer 19 is provided on the back surface of the door front plate 6 except at least the operation unit 9 and the operation information display unit 10. In other words, the colored paint layer 19 is provided in a window frame shape surrounding at least the operation unit 9 and the operation information display unit 10. Thereby, the foam heat insulating material 7 and the vacuum heat insulating material are processed so as not to be seen from the front side of the left refrigerator compartment door 2a, and the operation unit 9 and the operation information display unit 10 are clearly visually recognized. It constitutes an excellent door.

  In addition, the structure which provides the colored paint layer 19 over the substantially whole back surface of the door front board 6 including the driving | operation information display part 10 may be sufficient. In this case, when the user is not operating, the operation unit 9 and the operation information display unit 10 are hidden by the colored paint layer 19, and when the user is operating, the operation unit 9 and the operation information display unit 10 are displayed by the colored paint layer 19. It is set as the structure which irradiates with illumination means 27a, 27b (details are mentioned later) from back so that it may emerge from the back surface.

  Next, the operation unit 9 and the driving information display unit 10 will be described in more detail with reference to FIGS. 2b and 4. FIG. 4 is an exploded perspective view of the board assembly according to the embodiment of the present invention.

  2b and FIG. 4, segments such as characters, numbers and symbols corresponding to the operation display unit 16a such as characters and symbols corresponding to the operation unit 9, the operation information display unit 10 and the operation information display unit 29 (indicator display unit). The display parts 16b and 16c are comprised on the sheet | seat member 16 mentioned later. The sheet member 16 is formed by coating or printing the operation display unit 16a or the segment display units 16b and 16c on a resin film or a resin plate, or opening the machine member so as to imitate characters, numbers, symbols or the like to be expressed. And configure.

  In other words, the operation unit 9 is the front surface (the front surface of the glass plate 6a which is the door front plate 6) at a position facing the sheet member 16 on which the operation display unit 16a is disposed. The operation information display units 10 and 29 are front surfaces (front surfaces of the glass plate 6a which is the door front plate 6) at positions facing the sheet member 16 on which the segment display units 16b and 16c are printed.

  In addition, the structure which provides the display for operation (the said character part) on the back surface of the glass plate 6a may be sufficient, and in this case, besides printing directly on the back surface of the glass plate 6a, there are etching and inlaying.

  Next, in FIG. 2b, the driving information display units 10 and 29 will be further described. The operation information display units 10 and 29 are configured to indicate the setting states and operation states of various functions in accordance with operation inputs from the operation unit 9. Specifically, the segment display unit 16b is configured to express a number by a combination of lighting / extinguishing of seven segments arranged in an 8-character shape. The operation information display unit 10 on the left side of FIG. 2b displays the temperature of the freezer compartment 1a, and the operation information display unit 10 on the right side displays the temperature of the refrigerator compartment 1b. Further, the segment display unit 16c corresponding to the operation information display unit 29 (indicator display unit) closer to the center has a tachometer based on the number of rotations of the compressor divided into a plurality of arcs. Express as (tachometer).

  The segment display units 16b and 16c are not necessarily configured to be divided into a plurality of segments, and may be configured by a single segment or a liquid crystal display, for example.

  The sheet member 16 is arranged on the back surface of the glass plate 6a which is the door front plate 6 so that the contact or the gap is very small. Therefore, when the operation display unit 16a and the segment display units 16b and 16c are irradiated from behind, the glass plate 6a can be transmitted from the back side to the front side and can be confirmed from the front side of the left refrigerator compartment door 2a. In other words, the door is excellent in appearance and has a high visibility and an outer surface made of a flat glass plate.

  As shown in FIG. 2, the operation unit 9 and the operation information display units 10 and 29 are arranged with the operation information display units 10 and 29 on the upper side and the operation unit 9 on the lower side in a horizontally long manner. In addition, the structure which arrange | positions the driving information display parts 10 and 29 and the operation part 9 along with right and left vertically may be sufficient.

  The operation unit 9 has functions of the refrigerator body 1 such as “refrigeration room temperature adjustment”, “rapid refrigerator operation”, “child lock”, “power saving operation”, “quick freezing operation”, “freezer room temperature adjustment”. Is displayed.

  Further, the operation unit 9 and the operation information display units 10 and 29 are illuminated from behind by LEDs 27a and 27b (light emitting diodes) which are illumination means on the substrates (first substrate 15 and second substrate 20) described later. Thus, the light is projected to the front surface of the glass plate 6a so as to be lifted up.

  Next, in FIG. 3, 12 is a board assembly. The substrate assembly 12 includes a detection unit 14 that detects an operation of the operation unit 9, a so-called touch sensor that detects capacitance, a first substrate 15 that controls input from the detection unit 14, and a storage chamber. A second substrate 20 that controls switching and lighting / extinguishing of the operation information display unit 10 that displays temperature and the like is incorporated.

  The board assembly 12 is detachably mounted in a board housing member 18 provided between the foam heat insulating material 7 or a vacuum heat insulating material (not shown) and the door front plate 6.

  As described above, the present embodiment includes a detection unit 14 (switch electrode) that detects a change in capacitance, a determination unit (touch sensor), and an automatic control unit (not shown) including a microcomputer. The substrate 15 and the second substrate 20 that displays the detection results of the detection unit 14, the temperatures of the refrigerator compartment 1a and the freezer compartment 1b, and the operating state of the compressor are provided separately.

  As shown in FIGS. 3 and 4, the first substrate 15 and the second substrate 20 constitute a substrate assembly 12 in a state of being incorporated in the substrate support member 17. Specifically, the first substrate 15 is provided on the surface of the substrate support member 17 (the rear side of the door front plate 6), and the second substrate 20 is provided on the back side of the substrate support member 17 (the rear side of the substrate storage member 18). It has been.

  The first substrate 15 has a front surface (door front plate 6 side) covered with a sheet member 16 and a rear surface (opposite side to the door front plate 6) covered with a substrate support member 17. The second substrate 20 has a front surface (door front plate 6 side) covered with a sheet member 16 and further covered with a substrate support member 17, and the rear surface is exposed or other member. Covered with.

  The sheet member 16 is configured to be in close contact with or close to the detection unit 14 including a switch electrode disposed on the front surface or the back surface of the first substrate 15. A plurality of LEDs 27 a are arranged on the rear surface of the first substrate 15 (the surface facing the front surface of the substrate support member 17). When the LED 27a emits light, the light is irradiated backward, and the light guide member 30 provided between the LED 27a and the substrate support member 17 is refracted or diffused. Then, the gap between the periphery of the detection unit 14 formed on the first substrate 15 and the first substrate 15 proceeds from the rear to the front via the light guide member 30, and then proceeds from the back surface to the front surface of the glass plate 6a. The light can be visually recognized from the front through the sheet member 16. Thereby, a predetermined character or symbol appears at the position of the operation unit 9 on the glass plate 6a. The light guide member 30 is formed of a resin having a light projecting property.

  Next, a plurality of LEDs 27b, which are illumination means, are arranged on the front surface of the second substrate 20. The substrate support member 17 is positioned on the front surface of the second substrate 20, but an opening 17e for transmitting the light of the LED 27b is formed on the front surface portion of the LED 27b. That is, the substrate support member 17 has a plurality of openings 17e corresponding to the plurality of LEDs 27b. Then, the LED 27b is turned on, and the light that has passed through any one of the openings 17e is transmitted through the segment display portions 16b and 16c of the sheet member 16, and then irradiated to the positions of the operation information display portions 10 and 29 of the glass plate 6a. The As a result, predetermined characters and symbols appear on the driving information display units 10 and 29.

  The detection unit 14 is paired with the operation unit 9 when incorporated in the left refrigerator compartment door 2a. That is, as shown in FIG. 4, the detection unit 14 is provided so as to be opposed to the operation unit 9 through the glass plate 6 a and the sheet member 16 that are insulators and overlap the back side.

  In the determination unit including the touch sensor element, the detection unit 14 detects a change in capacitance between the glass plate 6a and operates the load via the automatic control unit.

That is, when there is a change in the capacitance, the oscillation circuit includes an oscillation circuit whose oscillation and amplitude change according to the change in the capacitance. As a result, the automatic control unit that has extracted the switch signal and the on / off signal output from the determination unit drives the load. It is possible to determine whether or not various functions are set by displaying the operation result of the operation unit 9 on the previous operation information display units 10 and 29 or turning on / off the operation unit 9 itself. To do.
The

  In addition, depending on the operation in which the user simply passes near the operation unit 9 or the user wipes the front surface of the refrigerator body 1 (the front surface of the left refrigeration chamber door 2a) with a cloth or the like for cleaning, the determination unit may The switch signal to be output and the on / off signal are not output. This prevents malfunction.

  The glass plate 6a constituting the door front plate 6 of the refrigerator is an insulator and is a translucent plate material. And when LED27a is irradiated toward the front surface from the back surface of the operation part 9 of the glass plate 6a so that the front surface of the glass plate 6a may be the operation part 9, the characters and symbols of the sheet member 16 represented by printing or the like The operation content of the operation unit 9 is displayed. On the back surface of the glass plate 6 a facing the operation unit 9, a detection unit 14 provided on the first substrate 15 and connected to the determination unit is provided so as to be close to each other via the sheet member 16. The display of characters and symbols on the operation information display units 10 and 29 provided along with the operation unit 9 is turned on when the LED 27b which is an illumination unit provided on the second substrate 20 emits light.

  The operation information display units 10 and 29 are illuminated and displayed from the back surface by the LEDs 27b provided on the second substrate 20. When the user's hand or finger touches the operation unit 9, the detection unit 14 (switch electrode) on the first substrate 15 senses a change in capacitance with the glass plate 6a, and the first unit 15 Information is input to the determination unit on the substrate 15. And if a determination part detects an input, the data based on detection data will be output and a load will be operated via an automatic control part. Here, the load operated via the automatic control unit is an operation of a refrigeration cycle, an operation of a cold air circulation fan (not shown), an opening / closing control of a damper for controlling a cold air supply amount, or the like. By controlling these loads, it is possible to change the set temperature of the refrigerator compartment 1a and the freezer compartment 1b, or to set the quick refrigerator or the quick freeze.

  The first substrate 15 is provided with a detection unit 14 (switch electrode) that detects a change in capacitance, and a buzzer provided on the first substrate 15 when the determination unit determines a change in capacitance. An informing means (not shown) or the like emits an informing sound. Thereby, it can be made to recognize with a sound that a user's operation was received. In addition, it is possible to make the user intuitively understand that the setting is switched by adding a scale to the notification sound according to the change in the control content.

  Next, in FIG. 3, a protective film 19 a is pasted on the back surface of the colored paint layer 19. The protective film 19a protects the glass plate 6a from being scattered around even when a large impact is applied to the glass plate 6a and the glass is broken or cracked. Further, the foamed heat insulating material 7 is prevented from being seen through from the front side of the door so that the appearance is not impaired. In addition, the protective film 19a is not affixed on the operation unit 9 and the operation information display units 10 and 29. In other words, the protective film 19a is stuck on the glass plate 6a so as to surround the operation unit 9 and the operation information display units 10 and 29. Thereby, it is comprised so that the detection sensitivity of the detection part 14 may not be reduced. In addition, characters and symbols expressed by the operation display unit 16a and the segment display units 16b and 16c are displayed so as to float on the surface of the glass plate 6a so that the light from the LEDs 27a and 27b is transmitted.

Further, the operation unit 9 and the operation information display units 10 and 29 do not protrude from the door front plate 6 as in the prior art. Thereby, a door can be comprised by a flat surface and it can be set as the refrigerator with high design property which utilized the material of glass Next, the structure of the board | substrate assembly 12 is further demonstrated, referring FIGS. 4-7. To do. FIG. 5 is a cross-sectional view of the substrate assembly of FIG. FIG. 6 is an enlarged view of a portion P2 in FIG. 7 is a cross-sectional view taken along the line CC of FIG.

  4 and 5, the board assembly 12 includes a sheet member 16, a first board 15, a board support member 17, and a second board 20. The sheet member 16, the first substrate 15, the substrate support member 17, and the second substrate 20 are sequentially arranged from the glass plate 6a side toward the rear.

  As shown in FIG. 5, the substrate support member 17 has a first storage portion 21 for storing the first substrate 15 on the front surface and a second storage portion 22 for storing the second substrate 20 on the back surface. Yes. The first storage portion 21 has a shape protruding backward from the front, and the second storage portion 22 has a shape protruding forward from the rear. And when the 1st board | substrate 15 is accommodated in the 1st accommodating part 21, the front wall 17b of the board | substrate support member 17 located in the front surface of the 2nd accommodating part 22 is the same plane as the front surface of the 1st board | substrate 15. It is configured to be located above or within a predetermined slight depth width.

  At least the outer periphery of the first substrate 15 is placed on the flange portion 17c formed in a step shape on the outer periphery of the first storage portion 21 of the substrate support member 17, and the position thereof is regulated. The second substrate 20 is fixed to a boss portion 17 d formed on the substrate support member 17 by fastening means such as a screw 23.

  The thickness dimension in the front-rear direction of the substrate support member 17 is a shape that takes into account the height dimensions of the electronic components 24 and 25 mounted on the first substrate 15 and the second substrate 20, respectively. That is, the first storage portion 21 has a dimension in the front-rear direction that is larger than the height dimension from the front to the rear of the electronic component 24 mounted on the first substrate 15. The second storage portion 22 has a dimension in the front-rear direction that is larger than the height dimension from the rear to the front of the electronic component 25 mounted on the second substrate 20. The overall dimension of the substrate support member 17 in the front-rear direction is the same as or slightly smaller than the largest mounted component among the electronic components 24 and 25 mounted on the first substrate 15 and the second substrate 20, respectively. The dimensions are large. Thereby, when comprised as the board | substrate assembly 12, it is set as the structure near a plane so that thickness may be suppressed and an electronic component may not protrude in a front surface and a rear surface. Therefore, it becomes easy to incorporate the first substrate 15 and the second substrate 20 into the substrate support member 17, and when the substrate assembly 12 is assembled into the substrate storage member 18, the distance from the door front plate 6 can be easily reduced. Can do.

  In FIG. 4, the substrate housing member 18 serves to isolate the substrate assembly 12 from the foam heat insulating material 7, and the surface of the first substrate 15, specifically, the sheet member 16 is a glass plate 6 a which is the door front plate 6. It has the function of a guide that is brought into close contact with or close to. The substrate storage member 18 serves to hold the substrate assembly 12 in a detachable manner.

  Specifically, the substrate storage member 18 has an insertion portion 18d formed on the side. The insertion part 18d is disposed so as to communicate with the frame 2c on the left side of the left refrigerator compartment door 2a (see FIG. 2a). The insertion portion 18d is covered with a detachable closing member 2d after the board assembly 12 is assembled. Thereby, since the insertion part 18d is located between the left refrigerator compartment door 2a and the right refrigerator compartment door 2b, it is hard to visually recognize in the state which closed the door, and the design property is improved. In addition, the position of the insertion part 18d is not limited to the left side part of the left refrigerator compartment door 2a, You may provide in the upper part of the left refrigerator compartment door 2a, a lower part, a right side part, etc., or the side part of another door May be provided.

  In addition, guide portions 18 a are provided on the upper and lower portions of the substrate storage member 18 or on one of them. The terminal portion 18b of the guide portion 18a has an inclined shape or a curved shape that approaches the front side, that is, the door front plate 6 side. The start end portion 18c of the guide portion 18a has a narrow portion that can be elastically deformed. In this configuration, when the board assembly 12 is inserted from the insertion portion 18d of the board housing member 18, the guide protrusions 12a that are guided portions provided on the upper and lower portions of the board assembly 12 are narrowed at the start end portion 18c. Is spread and guided by the guide portion 18a. Then, the substrate assembly 12 is guided so as to approach the door front plate 6 side at a predetermined assembly position. Thereby, the detection part 14 which comprises the board | substrate assembly 12 can be brought close to the back surface of the door front board 6 to the distance which can be detected in the position of the operation part 9 of the door front board 6. FIG. Further, since the starting end portion 18c is deformed so as to form the original narrow portion after the guide projection 12a of the substrate assembly 12 has passed, the substrate assembly 12 is held so as not to drop off from the starting end portion 18c side.

  Further, the guide portion 18a of the present embodiment guides the board assembly 12 at a position away from the door front plate 6 at a position up to the end portion 18b. Thereby, it is prevented that the board | substrate assembly 12 contacts the door front board 6 and is damaged.

  In the present embodiment, the guide portions 18a are provided on the upper and / or lower portions of the substrate storage member 18, but the present invention is not limited to this. For example, the guide portion 18 a may be provided on the back surface of the substrate storage member 18. Moreover, the structure which makes the board | substrate assembly 12 adjoin to the door front board 6 side by making the back surface shape of the board | substrate storage member 18 into the shape which protruded ahead in the position of predetermined distance from the insertion part 18d may be sufficient.

  Further, a holding portion is formed on the closing member 2d that covers the insertion portion 18d, and after the substrate assembly 12 is stored in the substrate storage member 18, the substrate assembly 12 is pushed closer to the door front plate 6 side from the rear by this holding portion. It may be a configuration.

  By using this substrate storage member 18, it is possible to prevent the glass plate 6 a from being damaged when the substrate assembly 12 is assembled into the substrate storage member 18. Moreover, it becomes easy to hold | maintain a position in the state which brought the board | substrate assembly 12 close to the glass plate 6a in the installation position. Further, at the time of service such as inspection, the inspection work can be easily performed while preventing the glass plate 6a and the substrate itself from being damaged by the attachment / detachment of the substrate assembly 12.

  Next, the illumination means will be described with reference to FIGS. The light emitted from the LED 27b (illuminating means) on the second substrate 20 is guided to the glass plate 6a side through the opening 17e provided in the front wall 17b of the substrate support member 17. Since the board | substrate support member 17 can be integrated close to the door front board 6 side, the light of LED27b irradiated from the opening 17e can be efficiently displayed on the driving information display parts 10 and 29. FIG.

  As shown in FIG. 6, a plurality of openings 17 e are defined in the substrate support member 17 corresponding to the indicator display unit 29. The LED 27b is mounted on the second substrate 20 so as to correspond to the plurality of openings 17e. A part of the wall surface 26 forming the opening 17e is inclined so as to widen the opening area from the LED 27b side toward the front within the depth dimension of the second storage portion 22 in the front-rear direction.

  Specifically, the openings 17e are formed in a fan shape when viewed from the front, and are arranged in an arc shape by adjoining a plurality of fan shapes. In other words, a part of the annular portion having a predetermined width is divided and arranged.

  When the light emitted from the LED 27 passes through the opening 17e, the irradiation direction is reflected and corrected by the wall surface 26 as indicated by the arrow in FIG. Specifically, the LED 27b is disposed near one end of the opening 17e. In this embodiment, it is arranged near the outer periphery of the fan shape. And the wall surface 26 on the other end side opposite to the position where the LED 27b is arranged has an inclination so as to spread forward from the LED 27b. In the present embodiment, the fan-shaped inner wall surface 26 is inclined so as to spread forward. The other wall surfaces do not have an inclination and have a shape that is raised in a state of being almost horizontal in the front-rear direction.

  In this configuration, the traveling direction of light emitted from the LED 27b is represented by arrows a, b and c in FIG.

  First, the arrow a is light traveling straight from the LED 27b. The light of the arrow a reaches the sheet member 16 without being blocked, and then transmits to the front surface of the glass plate 6b.

  An arrow b is light at a lower irradiation position of 120 degrees, which is a general irradiation angle of the LED 27b. The light of the arrow b reaches the inclined wall surface 26 and then deflects and travels forward.

  Arrow c is the light at the upper irradiation position of 120 degrees that is the irradiation angle of the LED 27b. The light of the arrow c is reflected by the upper or almost horizontal upper wall surface, then reaches the inclined lower wall surface 26, is deflected again, and travels forward.

  In this way, the light emitted from the LED 27b is configured to travel as far forward as possible at any position of the opening 17e. In other words, at the front projection position of the LED 27b, non-reflected light travels directly in front of the glass plate 6a as indicated by the arrow a. In the periphery outside the front projection position of the LED 27b, the light is reflected by the wall surface 26 forming the opening 17e, and proceeds forward as indicated by the arrow b. In other words, the wall surface 26 has an inclined portion that reflects the light incident on the surface of the wall surface 26 so as to be incident substantially perpendicularly on the back surface of the door front plate 6.

  As a result, at least when passing through the sheet member 16, even in the case of a configuration in which a relatively large display portion (segment display portion 16 c facing the opening 17 e, indicator display portion 29) is irradiated as in the present embodiment. This light is emitted uniformly forward over the range of the display unit to be turned on, and a highly visible lighting display in which brightness spots are suppressed can be realized.

  The light of the arrow c is deflected forward in the vicinity of the front end of the wall surface 26, so that the edge of the target to be displayed is lit up and the border becomes clear.

  Further, one end of the wall surface 26 forming the opening 17 e is in contact with or close to the first substrate 20. The other end of the wall surface 26 reaches the front wall 17 b (surface portion 17 a of the substrate support member 17) of the second storage portion 22, and is in contact with or close to the sheet member 16.

  In other words, the wall portion 26 that forms the opening 17e corrects the light irradiated from the LED 27b by correcting the irradiation direction forward as shown by the arrow in FIG. The indicator display part 29 of the door front plate 6 can be irradiated without spots.

  Further, by forming the wall surface forming the opening 17e with a color tone or material having a high reflectance, light can be easily deflected, and the front can be illuminated more clearly.

  In this way, by configuring the light emitted from the LED 27b to guide forward, on the door front plate 6 side, the border of the indicator display unit 29 is clear and the visibility is improved.

  For example, when the user sets the power saving operation, the rotation speed of the compressor of the refrigerator is displayed in the range of 2100 rpm or less to 3300 rpm as an example, and the user sensuously determines the rotation speed of the compressor currently in operation. I can grasp it.

  Next, the high-frequency noise countermeasure structure of the substrate will be described with reference to FIG. FIG. 8 is a diagram schematically showing the substrate operation of the refrigerator shown in FIG.

  In FIG. 8, reference numeral 14 denotes a switch electrode (detection unit) provided on the first substrate 15 in the vicinity of the glass plate 6a. Reference numeral 31 denotes a noise protection resistor. Reference numeral 32 denotes a test terminal, which is provided for board management reasons. 33 is a touch sensor element. On the first substrate 15, the switch electrode 14, the noise protection resistor 31, the test terminal 32, and the touch sensor element 33 are incorporated.

  The test terminal 32 is used for confirming erroneous mounting or wiring of each electronic component by using a device such as a tester after mounting the electronic component on the control board 15.

  The noise protection resistor 31 is provided at a position between the test terminal 32 and the switch electrode 14. Further, by providing the test terminal 32 at a position away from both the touch sensor element 33 and the noise protection resistor 31, the workability at the time of inspection of the control board 15 is improved, and the control board 15 and the mounted parts are damaged. Can be reduced.

  A pattern shield 35 is provided on the back surface of the first substrate 15. Reference numeral 34 schematically represents the user's finger. The pattern shield 35 is provided in order to prevent a potential difference from occurring between a plurality of ground resistors as in the case of ground.

  The pattern shield 35 is provided on the back surface of the first substrate 15 including the noise protection resistor 31, the test terminal 32, and the touch sensor element 33. Further, the pattern shield 35 is not provided between the switch electrode 14 and the noise protection resistor 31.

  Here, the general switch electrode 14 is provided at a predetermined distance from the noise protection resistor 31 because it is provided close to the glass plate 6 a serving as the door front plate 6. In addition, since the switch electrode 14 is provided in the vicinity of the operation unit provided on the glass plate 6 a side, the switch electrode 14 is located away from the electronic component including the touch sensor element 33.

  In the present embodiment, the pattern shield 35 is not provided in the wiring portion between the switch electrode 14 and the noise protection resistor 31 located at a distance. This prevents a parasitic capacitance (capacitor) from being generated between the switch electrode 14 and the pattern shield 35.

  When the user's finger 34 touches the surface of the glass plate 6a, the capacitance of the switch electrode 14 on the first substrate 15 changes. This change is detected by the touch sensor element 33 and the operation unit 9 is operated.

  In the control board 15 configured as described above, the pattern shield 35 is applied to the noise protection resistor 31 as a countermeasure against high frequency noise, and the pattern shield 35 is not provided between the switch electrode 14 and the noise protection resistor 31, so that parasitic capacitance (capacitor) is provided. Preventing the occurrence of Thereby, the influence of the noise etc. which are given to a touch sensor element can be reduced, and signal noise and a signal delay can be suppressed.

  When the switch electrode 14 and the noise protection resistor 31 are close to each other, the pattern shield 35 is provided up to a part of the noise protection resistor 31, and the pattern shield 35 is provided between the switch electrode 14 and the noise protection resistor 31. The configuration may be such that it is not arranged.

  In other words, the touch sensor element 33, the test terminal 32, the noise protection resistor 31, and the switch electrode 14 are provided on the control board 15 in this order, and within a range including a part of the noise protection resistor 31 from the touch sensor element 33. A pattern shield 35 is provided.

  Since the present invention has the configuration as described above, the following effects can be obtained.

  That is, a storage room of the refrigerator body, a storage room door of the storage room, a door front plate having translucency in front of the storage room door, and a control board behind the door front plate, The control board includes a switch electrode provided in contact with or close to the rear surface of the door front plate, a touch sensor element that detects a change in capacitance of the switch electrode, and a gap between the touch sensor element and the switch electrode. And a noise shielding resistor, and a pattern shield is provided on the control board within a range including a part of the noise protecting resistor from the touch sensor element.

  Thereby, the influence of the noise etc. which are given to a touch sensor element can be reduced, and signal noise and a signal delay can be suppressed.

  Further, a test terminal is provided between the touch sensor element and the noise protection resistor, and the pattern shield is provided within a range including a part of the noise protection resistor from the touch sensor element including the test terminal.

  As a result, the control board can be inspected using a test terminal provided at a position farther between the touch sensor element and the noise protection resistor, so that workability is improved and damage to the board and mounting parts is prevented. be able to.

  Further, the switch electrode 14 is provided on the front surface of the control board 15, and the touch sensor element 33, the test terminal 32, and the noise protection resistor 31 are provided on the back surface of the control board 15.

  As a result, the wiring pattern of the control board can be consolidated and reduced in size, and the space volume for incorporating the control board can be reduced, so that a sufficient thickness of the heat insulating material for the storage chamber door can be secured.

1 Refrigerator body 1a Refrigerated room (storage room)
1b Freezer compartment 2a Left refrigerator compartment door (storage compartment door)
2c Door frame 4 Freezer compartment door 6 Door front plate 6a Glass plate 7 Foam insulation 8 Door inner plate 9 Operation part 10 Operation information display part 12 Board assembly 12a Guided part (guide protrusion)
14 Detector (switch electrode)
15 First board (control board)
16 Sheet member 16a Operation display portion 16b Segment display portion 16c Segment display portion 17 Substrate support member 17a Front surface portion 17b Front wall 17c Flange portion 17d Boss portion 17e Opening 18 Substrate storage member 18a Guide portion 18b End portion 18c Start end portion 18d Insertion portion 19 Colored paint layer 19a Protective film 20 Second substrate 21 First storage part 22 Second storage part 23 Screw (fastening means)
24 Electronic component 25 Electronic component 26 Wall surface 27a Illumination means (LED)
27b Illumination means (LED)
29 Operation information display (indicator display)
30 Light guide member 31 Noise protection resistor 32 Test terminal 33 Touch sensor element 35 Pattern shield

Claims (2)

A storage room of the refrigerator body,
A storage room door of the storage room;
A door front plate having translucency in front of the storage room door;
A control board behind the door front plate,
The control board is
A switch electrode provided in contact with or close to the rear surface of the door front plate;
A touch sensor element for detecting a change in capacitance of the switch electrode;
A noise protection resistor between the touch sensor element and the switch electrode,
A pattern shield is provided on the control board within a range including a part of the noise protection resistor from the touch sensor element ,
A refrigerator , wherein the switch electrode is provided on the front surface of the control board, and the touch sensor element and the noise protection resistor are provided on the back surface of the control board .   A test terminal is provided between the touch sensor element and the noise protection resistor, and the pattern shield is provided within a range including a part of the noise protection resistor from the touch sensor element including the test terminal. The refrigerator according to claim 1, wherein the refrigerator is characterized.