JP5014952B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a temperature sensor that detects the indoor temperature of a storage room.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator is provided with a temperature sensor on the back side of the back wall facing a vent hole provided in the back wall of the storage room. The temperature sensor has an element part and a lead wire. The element portion has an element for detecting temperature and is formed in a cylindrical shape. The lead wire is connected to the element portion and pulled out, and a coating such as vinyl chloride is applied.

  In the temperature sensor, the connecting portion is disposed downward with the axial direction of the element portion being vertical, and the lead wire extending downward is guided upward through a draining portion bent in a U-shape. When water spilled into the storage chamber adheres to the temperature sensor through the vent hole, it flows down through the element portion and the lead wire and drains at the draining portion. Therefore, it is possible to prevent water from entering the element portion from the boundary between the lead wire and the element portion.

Japanese Patent Laid-Open No. 7-270055 (pages 2 to 4 and FIG. 2)

  Refrigerators are international safety standard IEC 60335-1 “Safety of electrical equipment for home and similar use, Part 1: General requirements” and international safety standard IEC 60335-2-24 “Safety of electrical equipment for home use and similar use, part 2: In Section 15.101 and 15.102 of “Individual Requirements for Refrigerated Similar Equipment and Ice Cream / Ice Making Equipment”, test that water is splashed by the most unfavorable method so that the electrical insulation is not affected. A structure is required.

  However, according to the conventional refrigerator, water droplets may adhere to the boundary between the cylindrical element portion and the lead wire due to surface tension for a long period of time, so that the element portion may be submerged. For this reason, it is necessary to perform advanced waterproofing at the boundary between the element portion and the lead wire so as to satisfy the above international safety standard, and there is a problem that the cost of the temperature sensor and the refrigerator increases. In addition, if the coating of the lead wire is broken, there is a risk of short circuit due to the water flowing down the lead wire, which causes a problem of low safety.

  An object of the present invention is to provide a refrigerator capable of easily preventing water from entering a temperature sensor and improving safety.

  In order to achieve the above object, the present invention provides an indoor temperature of a storage room by means of a temperature sensor having an element for detecting a temperature and having a cylindrical element part and a lead wire connected to the element part. In the refrigerator for detecting the temperature sensor, the temperature sensor is installed in a recess provided on the wall surface of the storage chamber with the axial direction of the element portion being vertically arranged, and the element portion penetrates the upper surface of the recess. The boundary between the lead wire and the element portion is arranged above the recess.

  According to this configuration, the recess is provided in, for example, the back wall of the storage chamber, and the temperature sensor is disposed in the recess. In the temperature sensor, a cylindrical element portion is arranged vertically, and a lead wire extends from the upper end of the element portion that penetrates the upper surface of the recess. When water or the like spills into the storage chamber, the water that has entered the recess is blocked by the upper surface of the recess and does not reach the boundary between the element portion and the lead wire.

  Moreover, in the refrigerator having the above-described configuration, the present invention provides a heat insulating box that is filled with foam heat insulating material to form the storage chamber, and a wiring storage portion that is recessed in the heat insulating box and opens to face the storage chamber. A panel that forms the recess and closes the opening of the wiring storage portion; and a buried electric wire that is embedded in the heat insulation box and is drawn out from an outlet provided in the wiring storage portion and connected to the lead wire And the outlet and the concave portion are arranged so as to be biased to the same side of the wiring storage portion.

  According to this configuration, the wiring storage portion is recessed in, for example, the back surface of the storage chamber by the heat insulating box, and the embedded electric wire is drawn out from the outlet that is biased to one side of the back surface of the storage chamber. The opening on the front surface of the wiring storage portion is closed by a panel having a recess. The concave portion is arranged on the back side of the storage chamber so as to be biased to the same side as the outlet, and the lead wire of the temperature sensor arranged in the concave portion is connected to the buried electric wire drawn from the outlet.

  In the refrigerator having the above-mentioned configuration, the present invention provides a lighting unit that is recessed in the center of the panel and in which an illuminating lamp is disposed, and a translucent lighting cover that covers a front surface of the lighting unit and has a vent hole. And the take-out port and the concave portion are arranged so as to be biased to one side with respect to the illumination portion.

  According to this configuration, the illumination unit is recessed in the center of the panel that covers the wiring storage unit, and the front surface of the illumination unit is covered by the illumination cover having the vent holes. An illumination lamp is arranged in the illumination unit, and the storage room is illuminated. The outlet of the embedded electric wire and the recessed portion are arranged on the same left and right sides with respect to the illumination unit, and the lead wire and the embedded electric wire are connected without passing below the illumination unit. The interior of the illumination unit is cooled by cold air that enters through the vent hole. Water that has entered the illuminating unit or water generated in the illuminating unit due to condensation or the like is discharged from the vent hole.

  Further, the present invention is characterized in that, in the refrigerator having the above-described configuration, the concave portion is formed of a resin molded product, and the upper surface of the concave portion is formed in a film shape that can be elastically deformed. According to this configuration, the element portion of the temperature sensor is pushed into the upper surface of the film-shaped recess, and the upper surface is elastically deformed and is in close contact with the element portion.

  According to the present invention, in the refrigerator configured as described above, a lead wire support portion having an insertion hole into which the lead wire is fitted is provided above the recess, and the lead wire support portion is formed in a film shape that can be elastically deformed. It is characterized by comprising resin molded products. According to this configuration, the lead wire of the temperature sensor is pushed into the film-like lead wire support portion, and the lead wire support portion is elastically deformed to be in close contact with the lead wire.

  In the refrigerator configured as described above, the element portion is covered with a bottomed cylindrical cap having an opening at one end, and the opening where the lead wire is disposed is sealed with a thermosetting resin. It is characterized by.

  According to the present invention, the temperature sensor is arranged vertically in the axial direction of the element portion, and the element portion penetrates the upper surface of the concave portion and the boundary between the lead wire and the element portion is arranged above the concave portion. Water is blocked by the upper surface of the recess. This prevents water droplets from adhering to the boundary between the lead wire and the element portion. Therefore, it is possible to easily prevent water from entering the element portion and reduce the cost of the refrigerator. Moreover, even if the coating of the lead wire is broken, water does not adhere to the lead wire, so that a short circuit can be prevented and the safety of the refrigerator can be improved.

  Further, according to the present invention, since the recessed portion is formed in the panel that recesses the wiring storage portion in the heat insulating box and closes the opening of the wiring storage portion, it is possible to easily realize the recessed portion through which the element portion penetrates the upper surface. Moreover, since the outlet and the recess from which the embedded electric wire is drawn out are arranged on the same side of the wiring storage portion, the lead wire can be shortened and the cost of the refrigerator can be further reduced.

  Further, according to the present invention, since the take-out port and the concave portion are arranged so as to be biased to one side with respect to the illumination unit, no lead wire is disposed below the illumination unit. Thereby, the infiltration of the lead wire by the water which penetrate | invaded the illumination part and the dripping of the water which generate | occur | produced in the illumination part can be prevented, and the safety | security of a refrigerator can be improved more.

  Further, according to the present invention, since the upper surface of the concave portion is formed into a film shape that can be elastically deformed, the upper surface of the concave portion can be brought into close contact with the element portion to prevent water from entering the upper portion of the concave portion.

  Further, according to the present invention, the lead wire support portion having an insertion hole into which the lead wire is fitted is provided above the recess, and the lead wire support portion is formed in a film shape that can be elastically deformed. Adheres closely to the lead wire. Thereby, even if a water droplet drops from above the temperature sensor, it is blocked by the lead wire support portion, and it is possible to prevent the water droplet from reaching the boundary between the lead wire and the element portion.

  Further, according to the present invention, the element portion is covered with the bottomed cylindrical cap, and the opening of the cap is sealed with the thermosetting resin, so that it is possible to more reliably prevent water from entering the element portion.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a perspective view and a front view showing a refrigerator according to an embodiment. The main body of the refrigerator 1 is partitioned by a heat insulating box 5 filled with a foam heat insulating material. In the upper part of the refrigerator 1, there is provided a refrigerator compartment 2 that is opened by a door 2 a, 2 b with a middle boundary. Below the refrigerator compartment 2, a vegetable compartment 3 and a freezer compartment 4 that are opened and closed by doors 3a and 4a, respectively, are arranged side by side.

  A panel 10 having an illumination unit 12 is provided on the front surface of the heat insulating box 5 that forms the back wall 2c of the refrigerator compartment 2. 3 and 4 are an exploded perspective view and a front view showing the panel 10 portion of the back wall 2c of the refrigerator compartment 2. FIG. 5 and 6 show an AA sectional view and a BB sectional view of FIG. 4, respectively. The heat insulating box 5 has an inner box of a resin molded product and the inner surface of the refrigerator compartment 2 is formed. A wiring storage portion 5 a is recessed in the back wall 2 c of the refrigerator compartment 2.

  The front surface of the wiring housing 5a is covered with a panel 10 made of a soft resin molded product such as PP. In the center of the panel 10, an illumination unit 12 having a front opening is recessed. An illumination lamp 15 is disposed in the illumination unit 12, and the front surface of the illumination unit 12 is covered with a translucent illumination cover 13. A ventilation hole 13 a is provided in the lower part of the illumination cover 13.

  The inside of the refrigerator compartment 2 is illuminated by the lighting of the illumination lamp 15. The interior of the illumination unit 12 is cooled by the cold air in the refrigerator compartment 2 that flows in through the vent hole 13a. In addition, water that has entered the illumination unit 12 or water generated in the illumination unit 12 due to condensation or the like is discharged from the vent hole 13a.

  The panel 10 is formed with a recess 11 having an opening on the side of the illumination unit 12. The recess 11 is provided with a refrigerator temperature sensor 20 that detects the indoor temperature of the refrigerator 2. A lead-out port 14 is provided on the same side as the recess 11 with respect to the illumination unit 12 in the wiring storage unit 5a. The embedded electric wire 19 embedded in the heat insulating box 5 is drawn out into the wiring storage portion 5 a through the outlet 14. The embedded electric wire 19 is connected to the illuminating lamp 15 and the lead wire 22 of the cold room temperature sensor 20. Thereby, wiring, such as the embedded electric wire 19 and the lead wire 22, is accommodated in the wiring accommodating part 5a.

  FIG. 7 shows a cross-sectional view of the refrigerator compartment temperature sensor 20. In the refrigerator compartment temperature sensor 20, a lead wire 22 is led out from the element portion 21. The element part 21 has an element (not shown) for detecting temperature and is formed in a cylindrical shape. The lead wire 22 is connected to the element portion 21 and pulled out, and a coating such as vinyl chloride is applied. The end portion of the element portion 21 is sealed by the welded portion 23 to prevent water from entering from the boundary between the element portion 21 and the lead wire 22.

  8 and 9 show a front view and a top view showing details of the recess 11. FIG. 10 is a cross-sectional view taken along the line CC in FIG. A plurality of ribs 11 c are projected from the side wall of the recess 11. The refrigerator compartment temperature sensor 20 is engaged with the rib 11 c and disposed in the recess 11. The upper surface 11a of the recess 11 is formed in a film shape having a thickness of 1 mm or less, and is easily elastically deformed because it is made of a soft resin.

An insertion hole 11b is formed in the upper surface 11a, and the element portion 21 of the refrigerator compartment temperature sensor 20 is pushed into the insertion hole 11b with the lead wire 22 facing upward. Thus, the element portion 21 is arranged vertically in the axial direction and penetrates the upper surface 11 a of the recess 11, and the boundary between the element portion 21 and the lead wire 22 is disposed above the recess 11. Further, the upper surface 11 a of the recess 11 is elastically deformed and comes into close contact with the element portion 21 .

  A lead wire support portion 17 protrudes above the recess 11 on the back surface of the panel 10. FIG. 11 shows a top view of the lead wire support 17. The lead wire support portion 17 is formed in a film shape having a thickness of 1 mm or less and is made of a soft resin, so that it is easily elastically deformed. The lead wire support portion 17 is formed with an insertion hole 17b substantially at the center, and a notch 17a extending from the insertion hole 17b to the rear end of the lead wire support portion 17 is formed. The lead wire 22 is inserted into the insertion hole 17b through the notch 17a. The insertion hole 17 b of the lead wire support portion 17 is elastically deformed and comes into close contact with the lead wire 22.

  12 and 13 show a circuit diagram and a block diagram of the refrigerator 1. Each part of the refrigerator 1 is controlled by a control board 30 having a microcomputer. The control board 30 is provided with a transformer circuit 31. The control board 30 includes a power source 32, a door switch 33, a refrigerator temperature sensor 20, a freezer temperature sensor 34, a defrost temperature sensor 35, a display unit 36, an illumination lamp 15, an ion generator 37, a compressor 38, and a door heater. 39, a defrosting heater 40, a refrigerator fan motor 41, a freezer fan motor 42, a cooling fan motor 43, and a refrigerator damper 44 are connected.

  The power source 32 is a commercial power source and supplies power to the refrigerator 1. The input voltage of the power supply 2 is transformed by the transformer circuit 31 and supplied to each part. The compressor 38 is connected to the control board 30 via the relay circuit 38a and the protection circuit 38b, and operates the refrigeration cycle. A cooler and a condenser (both not shown) are connected to the compressor 38, and the cooler and the air on the low temperature side of the refrigeration cycle exchange heat to generate cold air.

  The door switch 33 detects opening / closing of the doors 2a, 2b, 3a, 4a of the refrigerator compartment 2, the vegetable compartment 3, and the freezer compartment 4. Thereby, for example, when the door 2a is opened, the illumination lamp 15 is turned on. Moreover, an alarm will be alert | reported if the state in which each door is opened is continued. The door heater 39 is disposed on the doors 2a, 2b, 3a, and 4a, and prevents condensation on the doors 2a, 2b, 3a, and 4a.

  The freezer temperature sensor 34 detects the indoor temperature of the freezer room 4. The defrosting heater 40 is connected to the control board 30 via the fuse 40a, and defrosts the cooler. The defrosting temperature sensor 35 detects the temperature of the cooler during defrosting and stops the defrosting heater 40. The display unit 36 has an LCD control circuit 36 a that controls the LCD, and displays the operating state of the refrigerator 1.

  The freezer compartment fan motor 42 sends cold air generated by the cooler to the freezer compartment 4 in accordance with the temperature detected by the freezer compartment temperature sensor 34. The refrigerator compartment damper 44 opens and closes the passage of the cold air generated by the cooler and guides the cold air to the refrigerator compartment 2 according to the temperature detected by the refrigerator compartment temperature sensor 20. The refrigerating room fan motor 41 is driven when the refrigerating room damper 44 is opened, and sends out the cold air generated by the cooler to the refrigerating room 2. The cooling fan motor 43 cools the condenser and the compressor 38.

  The ion generator 37 sends positive ions and negative ions to the refrigerating room 2 to sterilize the refrigerating room 2 and the vegetable room 3.

  In the refrigerator 1 configured as described above, when the freezer compartment 4 detects that the freezer compartment temperature sensor 34 has become higher than a predetermined temperature by the freezer compartment temperature sensor 34, the compressor 38 and the freezer compartment fan motor 42 are driven. Cold air generated by the cooler by driving the compressor 38 is sent to the freezer compartment 4 by the freezer fan motor 42. When the freezer compartment 4 reaches a predetermined temperature, the compressor 38 and the freezer compartment fan motor 42 are stopped.

  When the refrigerator compartment temperature sensor 20 detects that the refrigerator compartment 2 has become higher than a predetermined temperature, the refrigerator compartment damper 44 is opened and the compressor 38 and the refrigerator compartment fan motor 41 are driven. Cold air generated in the cooler by driving the compressor 38 is sent to the refrigerator compartment 2 by the refrigerator fan motor 41. The cold air sent to the refrigerator compartment 2 flows through the refrigerator compartment 2 and the vegetable compartment 3. When the refrigerator compartment 2 reaches a predetermined temperature, the refrigerator compartment damper 44 is closed, and the compressor 38 and the refrigerator compartment fan motor 41 are stopped.

  According to the present embodiment, the refrigerating room temperature sensor 20 (temperature sensor) is arranged vertically in the axial direction of the element portion 21, and the element portion 21 penetrates the upper surface 11 a of the concave portion 11 so as to connect the lead wire 22 and the element portion 21. Since the boundary is disposed above the recess 11, the water that enters the recess 11 is blocked by the upper surface 11 a of the recess 11. Thereby, adhesion of water droplets to the boundary between the lead wire 22 and the element portion 21 is prevented. Therefore, it is possible to easily prevent water from entering the element portion 21 and reduce the cost of the refrigerator 1. Moreover, even if the coating of the lead wire 22 is broken, water does not adhere to the lead wire 22, so that a short circuit can be prevented and the safety of the refrigerator 1 can be improved.

  Moreover, since the recessed part 11 was formed in the panel 10 which recessedly provided the wiring storage part 5a in the heat insulation box 5, and closed the opening of the wiring storage part 5a, the recessed part 11 which the element part 21 penetrates easily the upper surface 11a is implement | achieved. be able to. A cover having a vent hole may be provided on the front surface of the recess 11.

  Further, the outlet 14 from which the embedded electric wire 19 is drawn out and the concave portion 11 are arranged so as to be biased to the same side of the wiring storage portion 5a. Thereby, the lead wire 21 can be shortened and the cost of the refrigerator 1 can be reduced more.

  As shown in FIG. 14, the outlet 14 and the recess 11 may be arranged on different sides with respect to the illumination unit 12. However, if a hole for inserting a wiring or the like is provided in the illuminating unit 12, the lead wire 22 may be submerged due to dripping of water that has entered the illuminating unit 12 or water generated by condensation or the like in the illuminating unit 12. At this time, if the covering of the lead wire 22 is broken, there is a risk of short circuit. For this reason, if the outlet 14 and the recessed part 11 of the buried electric wire 19 are arranged so as to be biased to one side with respect to the illumination part 12, the lead wire 22 can be prevented from being flooded and the safety of the refrigerator 1 can be further improved.

  In addition, since the upper surface 11a of the recess 11 is formed in a film shape that can be elastically deformed, the upper surface 11a can be in close contact with the element portion 21 to prevent water from entering the upper portion of the recess 11.

  In addition, since the lead wire support portion 17 above the recess 11 is formed in a film shape that can be elastically deformed, the lead wire support portion 17 is in close contact with the lead wire 22. As a result, even if a water droplet drops from above the refrigerator compartment temperature sensor 20, it is blocked by the lead wire support portion 17, and it is possible to prevent the water droplet from reaching the boundary between the lead wire 22 and the element portion 21.

  The element portion 21 may be covered with a bottomed cylindrical cap such as a resin molded product, and the opening of the cap may be sealed with a thermosetting resin. Thereby, it is possible to more reliably prevent water from entering the element portion 21 with a simple configuration. It is more desirable that the thickness of the cap is 1 mm or more because it is difficult to break.

  In the present embodiment, the panel 10 having the recess 11 is provided on the back wall 2c of the refrigerator compartment 2, but may be provided on the side wall. Moreover, you may provide the recessed part 11 in other store rooms, such as the vegetable compartment 3 and the freezer compartment 4. FIG.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator provided with the temperature sensor which detects the room temperature of a store room.

The perspective view which shows the refrigerator of embodiment of this invention The front view which shows the refrigerator of embodiment of this invention The disassembled perspective view which shows the wiring storage part of the refrigerator compartment of the refrigerator of embodiment of this invention The front view which shows the wiring storage part of the refrigerator compartment of the refrigerator of embodiment of this invention AA sectional view of FIG. BB sectional view of FIG. The longitudinal cross-sectional view which shows the refrigerator compartment temperature sensor of the refrigerator of embodiment of this invention The front view which shows the recessed part of the refrigerator compartment of the refrigerator of embodiment of this invention The top view which shows the recessed part of the refrigerator compartment of the refrigerator of embodiment of this invention CC sectional view of FIG. The top view which shows the lead wire support part of the refrigerator compartment of the refrigerator of embodiment of this invention The circuit diagram which shows the structure of the refrigerator compartment of the refrigerator of embodiment of this invention The block diagram which shows the structure of the refrigerator compartment of the refrigerator of embodiment of this invention. The front view which shows the other wiring storage part of the refrigerator compartment of the refrigerator of embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerating room 2c Back wall 3 Vegetable room 4 Freezing room 5 Heat insulation box 5a Wiring storage part 10 Panel 11 Recessed part 11a Top surface 12 Illumination part 13 Illumination part cover 14 Outlet 15 Illumination lamp 17 Lead wire support part 19 Embedded electric wire 20 Refrigerating room temperature sensor 21 Element part 22 Lead wire 30 Control board 31 Transformer circuit 32 Power supply 33 Door switch 34 Freezing room temperature sensor 35 Defrost temperature sensor 36 Display part 37 Ion generator 38 Compressor 39 Door heater 40 Defrost heater 41 Refrigeration Room fan motor 42 Freezer room fan motor 43 Cooling fan motor 44 Cold room damper

Claims (6)

In the refrigerator for detecting the indoor temperature of the storage room by a temperature sensor having an element part formed in a cylindrical shape having an element for detecting temperature and a lead wire connected to the element part,
The temperature sensor is disposed in a recess provided in the wall surface of the storage chamber with the axial direction of the element portion being vertically arranged, and the element portion penetrates the upper surface of the recess and the lead wire and the element The refrigerator is characterized in that the boundary with the section is disposed above the upper surface of the recess.   A heat insulating box that is filled with foamed heat insulating material to form the storage chamber; a wiring storage that is recessed in the heat insulating box and opens to face the storage chamber; and the wiring storage that forms the recess. A panel that closes the opening of the portion, and a buried electric wire that is embedded in the heat insulating box and is drawn out from the outlet provided in the wiring storage portion and connected to the lead wire, and the outlet and the recess The refrigerator according to claim 1, wherein the refrigerator is arranged on the same side of the wiring storage unit.   An illumination unit that is recessed in the central portion of the panel and in which an illuminating lamp is disposed; and a translucent illumination cover that covers the front surface of the illumination unit and has a vent hole; The refrigerator according to claim 2, wherein the refrigerator is disposed so as to be biased toward the illumination unit.   The refrigerator according to any one of claims 1 to 3, wherein the concave portion is formed of a resin molded product, and the upper surface of the concave portion is formed in a film shape that can be elastically deformed. A lead wire support portion having an insertion hole into which the lead wire is fitted is provided above the upper surface of the concave portion, and the lead wire support portion is made of a resin molded product formed in an elastically deformable film shape. The refrigerator in any one of Claims 1-4 characterized by the above-mentioned.   6. The element portion is covered with a bottomed cylindrical cap having an opening at one end, and the opening in which the lead wire is disposed is sealed with a thermosetting resin. The refrigerator in any one of.

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