JP6979414B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator.

Conventionally, the refrigerating cycle of a refrigerator is configured to flow through a compressor, a radiator (condenser), a capillary tube, an evaporator, and a suction pipe in order, and then return to the compressor (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-8809

By the way, in a refrigerator, a control board provided on the ceiling of the refrigerator body (insulation box body) and various electric parts such as a compressor, a heater, and a sensor are connected by a harness (lead wire). These harnesses are arranged in a narrow space between the back plate and the rear plate of the inner box. In the refrigerator described in Patent Document 1, for example, when a suction pipe is arranged in the vicinity of a harness connecting a control board and a compressor, the harness and the suction pipe come into contact with each other, and noise exceeding a specified value is generated. It was confirmed that it would be done.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a refrigerator capable of suppressing noise to a specified value or less.

The present invention includes a heat insulating box body having an inner box, an outer box, and a heat insulating material formed between the inner box and the outer box, and a compressor arranged under the heat insulating box body. A condenser that condenses the refrigerant discharged from the compressor, a capillary tube that decompresses the refrigerant condensed by the condenser, and a capillary tube that is arranged on the back surface of the heat insulating box and transfers the refrigerant from the evaporator to the compressor. A suction pipe to be returned, a heat exchange section for heat exchange between the capillary tube and the suction pipe, a control device arranged on the upper part of the heat insulating box and controlling the compressor, and a heat insulating box. A harness for electrically connecting the compressor and the control device is provided, the heat insulating box body is provided with a refrigerating chamber and a freezing chamber arranged vertically adjacent to each other, and the evaporator is the same. A refrigerating room side evaporator that generates cold air to be supplied to the refrigerating room and a freezing room side evaporator that generates cold air to be supplied to the freezing room are provided, and the suction pipe is provided on the refrigerating room side of the refrigerating room. The suction pipe, the freezing chamber side suction pipe provided in the freezing chamber, the confluence portion where the refrigerating chamber side suction pipe and the freezing chamber side suction pipe merge, and the shared portion for returning the refrigerant from the confluence portion to the compressor. The common suction pipe provided with a suction pipe, the confluence portion is located on the back side of the refrigerator compartment side evaporator, and the common suction pipe located on the upper part of the heat insulating box body is disengaged from the projection in the front-rear direction of the harness. It is characterized in that it is arranged in a vertical position.

According to the present invention, it is possible to provide a refrigerator capable of suppressing noise to a specified value or less.

It is a front view which shows the refrigerator of this embodiment. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is sectional drawing when the refrigerator of FIG. 1 is cut along the line BB of FIG. It is a schematic diagram which shows the refrigerating cycle which concerns on the refrigerator of this embodiment. It is a layout drawing when the suction pipe and the harness are seen from the front side. An enlarged view of a main part of the refrigerator of FIG. 2 is shown, (a) is the present embodiment, and (b) is a comparative example. It is a layout drawing when the suction pipe and the harness which concerns on a modification are seen from the front side.

Hereinafter, the refrigerator of the present embodiment will be described with reference to the drawings.
FIG. 1 is a front view showing the refrigerator of the present embodiment.
As shown in FIG. 1, the box body (insulation box body) 10 of the refrigerator 1 is in the order of the refrigerating room 2, the ice making room 3 and the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 attached to the left and right from the top. Has a storage room at. Further, the refrigerator 1 includes rotary refrigerating chamber doors 2a and 2b divided into left and right, which open and close the opening of the refrigerating chamber 2. Further, the refrigerator 1 includes a drawer-type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and vegetables that open and close the openings of the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6, respectively. The room door 6a is provided. Hereinafter, the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 are collectively referred to as a freezing chamber 7.

The freezing chamber 7 is basically a storage chamber in which the inside of the refrigerator is set to a freezing temperature zone (less than 0 ° C.), for example, about -18 ° C. on average. In the refrigerating room 2 and the vegetable room 6, the inside of the refrigerator is set to a refrigerating temperature zone (0 ° C. or higher). be.

The refrigerating room 2 and the upper freezing room 4 and the ice making room 3 are separated by a heat insulating partition wall 28. The lower freezing room 5 and the vegetable room 6 are separated by a heat insulating partition wall 29. Further, on the front side of each storage chamber of the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5, the inside of the freezing chamber 7 is formed through the gap between the ice making chamber door 3a, the upper freezing chamber door 4a, and the lower freezing chamber door 5a. A heat insulating partition wall 30 is provided so that the air does not leak to the outside of the refrigerator and the air outside the refrigerator does not enter each storage chamber.

The refrigerating room door 2a is provided with an operation unit 26 for operating the temperature setting in the refrigerator. Further, door hinges (not shown) for fixing the refrigerator 1 and the refrigerating chamber doors 2a and 2b are provided at the upper and lower portions of the refrigerating chamber 2. The upper door hinge is covered by the door hinge cover 16.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.
As shown in FIG. 2, the box body 10 of the refrigerator 1 is configured by filling a heat insulating material R (for example, urethane foam) between an outer box 10a made of a steel plate and an inner box 10b made of a synthetic resin. , The outside of the refrigerator 1 and the inside of the refrigerator 1 are separated. The heat insulating material R is formed by injecting and foaming a foamed heat insulating material made of rigid urethane foam.

Further, in the box body 10, in addition to the heat insulating material R, a plurality of vacuum heat insulating materials 25 are mounted between the outer box 10a and the inner box 10b. That is, the vacuum heat insulating material 25 is provided on the back surface side, the ceiling side (see FIG. 6), the left side surface side (not shown), the right side surface side (not shown), and the bottom surface side (not shown) of the box body 10.

The freezing chamber 7 includes an ice making chamber container (not shown), an upper freezing chamber container 4b, and a lower freezing chamber container 5b, which are drawn out integrally with the ice making chamber door 3a, the upper freezing chamber door 4a, and the lower freezing chamber door 5a, respectively. There is. The vegetable compartment 6 includes a vegetable compartment container 6b that is pulled out integrally with the vegetable compartment door 6a.

Further, on the back of the refrigerating chamber 2, an evaporator 14a (evaporator) on the refrigerating chamber side is provided in the evaporator chamber 8a on the refrigerating chamber side. The air that has become cold due to heat exchange with the refrigerator room side evaporator 14a is passed through the refrigerating room air passage 11 and the refrigerating room discharge port 11a by the refrigerating room side fan 9a provided above the refrigerating room side evaporator 14a. Air is blown to the refrigerating room 2 to cool the inside of the refrigerating room 2. The air blown to the refrigerating chamber 2 returns to the refrigerating chamber side evaporator chamber 8a from the refrigerating chamber return ports 15a and 15b (see FIG. 3), and is cooled again by the refrigerating chamber side evaporator 14a.

Further, on the back of the freezing chamber 7, a freezing chamber side evaporator 14b (evaporator) is provided in the freezing chamber side evaporator chamber 8b. The air that has become cold due to heat exchange with the freezer room side evaporator 14b is sent through the freezing room side air passage 12 and the freezing room discharge port 12a by the freezing room side fan 9b provided above the freezing room side evaporator 14b. Blow air into the freezing chamber 7 to cool the inside of the freezing chamber 7. The air blown to the freezing chamber 7 returns to the freezing chamber side evaporator chamber 8b from the freezing chamber return port 17, and is cooled again by the freezing chamber side evaporator 14b.

In the refrigerator 1 of the present embodiment, the vegetable compartment 6 is also cooled by the air cooled by the evaporator 14b on the freezing chamber side. The air in the freezer room side evaporator room 8b, which has become cold in the freezing room side evaporator 14b, is passed through the vegetable room air passage (not shown) and the vegetable room damper (not shown) by the freezing room side fan 9b. Blow air into the room 6 to cool the inside of the vegetable room 6. When the temperature of the vegetable compartment 6 is low, the cooling of the vegetable compartment 6 is suppressed by closing the vegetable compartment damper. The air blown to the vegetable compartment 6 returns from the cold air return portion 18a on the vegetable compartment side provided in front of the lower portion of the heat insulating partition wall 29 to the lower portion of the evaporator chamber 8b on the freezing chamber side via the vegetable compartment cold air return duct 18. ..

A refrigerator compartment temperature sensor 41, a freezer compartment temperature sensor 42, and a vegetable compartment temperature sensor 43 are provided on the back side of the refrigerator compartment 2, the freezer compartment 7, and the vegetable compartment 6, respectively. A refrigerating room side evaporator temperature sensor 40a is provided above the refrigerating room side evaporator 14a, and a freezing room side evaporator temperature sensor 40b is provided above the freezing room side evaporator 14b. These sensors 41, 42, 43, 40a, 40b (hereinafter collectively referred to as sensors 40) are of the refrigerating chamber 2, the freezing chamber 7, the vegetable chamber 6, the refrigerating chamber side evaporator 14a, and the refrigerating chamber side evaporator 14b. Detect the temperature. Further, the refrigerator 1 is provided with an outside air temperature sensor 37 and an outside air humidity sensor 38 for detecting the temperature and humidity of the outside air (outside air) inside the door hinge cover 16 on the ceiling. As another sensor, a door sensor (not shown) for detecting the open / closed state of each door 2a, 2b, 3a, 4a, 5a, 6a is provided.

Further, a control board 31 (board) is provided on the ceiling surface (upper part of the heat insulating box body) of the outer box 10a. The control board 31 is housed in a recess formed on the ceiling surface and is covered with a board cover 31a.

Further, the control board 31 is equipped with a CPU, memories such as ROM and RAM, an interface circuit, and the like. The control board 31 includes an outside air temperature sensor 37, an outside air humidity sensor 38, a refrigerating room temperature sensor 41, a freezing room temperature sensor 42, a vegetable room temperature sensor 43, a refrigerating room side evaporator temperature sensor 40a, and a freezing room side evaporator temperature sensor. It is connected to 40b or the like via electrical wiring (not shown). Further, the control board 31 is connected to the compressor 24, the refrigerating room side fan 9a, and the freezing room side fan 9b via electrical wiring (not shown).

Further, the control board 31 is a compressor 24 or a refrigerator based on the output values of the sensors 41, 42, 43, 40a, 40b, the settings of the operation unit 26 (see FIG. 1), the program recorded in advance in the ROM, and the like. The room side fan 9a, the freezing room side fan 9b, the defrost heater 21, and the like are controlled. The compressor 24 has a maximum of 130 W, for example, and is supplied with a DC power supply. As described above, it is known that direct current is more likely to generate noise than alternating current.

FIG. 3 is a cross-sectional view taken along the line BB of FIG. 2 when the refrigerator of FIG. 1 is cut.
As shown in FIG. 3, a defrost heater 21 for heating the freezer chamber side evaporator 14b is provided in the lower part of the freezer chamber side evaporator chamber 8b. The defrosting heater 21 is, for example, an electric heater of 50 W to 200 W, and in the present embodiment, a radiant heater of 150 W is used. The defrosted water (melted water) generated during the defrosting of the freezer room side evaporator 14b falls on the toy 23b provided at the bottom of the freezer room side evaporator room 8b, and passes through the drain port 22b and the freezing drain pipe 27b. It is discharged to the evaporation tray 33 provided on the upper part of the compressor 24.

Further, the defrosted water generated during the defrosting of the refrigerating chamber side evaporator 14a falls on the toy 23a provided at the lower part of the refrigerating chamber side evaporator chamber 8a (see FIG. 2), and the drain port 22a and the refrigerating drain pipe are used. It is discharged to the evaporation tray 33 provided on the upper part of the compressor 24 via 27a.

The toy 23a is provided with a toy heater 101 that melts the defrosted water when the defrosted water in the toy 23a freezes. The drainage pipe 27a for refrigeration is provided with a drainage pipe upper heater 102 and a drainage pipe lower heater 103. Further, in the final water collecting portion of the toy 23a, a toy temperature sensor 45 for detecting the presence or absence of residual water is embedded inside the heat insulating partition wall 28. The toy temperature sensor 45 is configured to avoid deterioration of durability due to dripping of water by embedding it in a heat insulating material made of urethane foam. Further, the toy temperature sensor 45 is configured to react to a small amount of residual water by arranging it in the final water collecting portion of the toy 23a. The toy heater 101, the drain pipe upper heater 102, and the drain pipe lower heater 103 are electric heaters having a power consumption of 20 W or less and lower power consumption than the defrost heater 21. In the present embodiment, the toy heater 101 is a heater of 6 W, the drain pipe upper heater 102 is a heater of 3 W, and the drain pipe lower heater 103 is a heater of 1 W.

FIG. 4 is a schematic view showing a refrigerating cycle configuration according to the refrigerator of the present embodiment.
As shown in FIG. 4, the refrigerator 1 includes a compressor 24, an outside radiator 50a (condensor) and a wall surface heat dissipation pipe 50b (condensor), which are heat dissipation means for radiating refrigerant, and heat insulating partition walls 28 and 29. The dew condensation prevention pipe 50c for suppressing dew condensation on the front surface portion of the 30 is provided. Further, the refrigerator 1 includes a refrigerator chamber side capillary tube 53a1, 53a2 (capillary tube, decompression means), a freezer chamber side capillary tube 53b1, 53b2 (capillary tube, decompression means), a refrigerant and a refrigerator, which are decompression means for depressurizing the refrigerant. It is provided with a refrigerator compartment side evaporator 14a and a freezer compartment side evaporator 14b for exchanging heat with the air in the refrigerator and absorbing heat in the refrigerator. Further, the refrigerator 1 has a heat exchange section Q1 on the refrigerating room side, a capillary tube 53b2 on the freezing room side and a suction on the freezing room side, which exchange heat between the capillary tube 53a2 on the refrigerating room side and the suction pipe 55a (suction pipe) on the refrigerating room side. Heat exchange between the freezer chamber side heat exchange unit Q2, the refrigerating chamber side capillary tube 53a1 and the freezer compartment side capillary tube 53b1 and the shared suction pipe 55ab (suction pipe) that exchange heat with the pipe 55b (suction pipe). It is equipped with a common heat exchange unit Q3 (heat exchange unit) for performing the above. It also includes a dryer 51 that removes water during the refrigeration cycle, and gas-liquid separators (accumulators) 54a and 54b that prevent the liquid refrigerant from flowing into the compressor 24. Further, the refrigerator 1 includes a three-way valve 52 for controlling the refrigerant flow path, a check valve 56, and a refrigerant merging section 57 (merging section) for merging the refrigerant. In the present embodiment, the refrigeration cycle is configured by connecting these with a refrigerant pipe. The refrigerating chamber side suction pipe 55a, the freezing chamber side suction pipe 55b, the shared suction pipe 55ab, the refrigerating chamber side capillary tubes 53a1, 53a2, and the refrigerating chamber side capillary tubes 53b1, 53b2 are made of metal having high thermal conductivity. For example, it is made of copper.

The refrigerator 1 of the present embodiment uses isobutane, which is a flammable refrigerant, as a refrigerant. Further, the compressor 24 of the present embodiment is provided with an inverter so that the rotation speed can be changed.

The three-way valve 52 includes two outlets (outlet ports) 52a and 52b. The refrigerator 1 includes a refrigerating mode in which the refrigerant flows to the outlet 52a side and a refrigerating mode in which the refrigerant flows to the outlet 52b side, and these are switched by the three-way valve 52. Further, the refrigerator 1 also has a fully closed mode in which the refrigerant does not flow in both the outlet 52a and the outlet 52b, and a fully open mode in which the refrigerant flows in both of them. It is switchable.

In the refrigerator 1 of the present embodiment, the refrigerant flows as follows. The refrigerant discharged from the compressor 24 flows in the order of the outside radiator 50a, the wall surface heat dissipation pipe 50b, the dew condensation prevention pipe 50c, and the dryer 51, and reaches the three-way valve 52. The outlet 52a of the three-way valve 52 is connected to the refrigerator chamber side capillary tube 53a1 via a refrigerant pipe, and the outlet 52b is connected to the freezing chamber side capillary tube 53b1 via a refrigerant pipe.

When the three-way valve 52 allows the refrigerant to flow to the outlet 52a side, the refrigerant flowing out from the outlet 52a is the refrigerator chamber side capillary tubes 53a1, 53a2, the refrigerating chamber side evaporator 14a, the gas-liquid separator 54a, and the refrigerating chamber. After flowing in the order of the side suction pipe 55a, the refrigerant confluence portion 57, and the common suction pipe 55ab, the system returns to the compressor 24. In the capillary tube 53a on the refrigerating chamber side, the low-pressure and low-temperature refrigerant flows through the evaporator 14a on the refrigerating chamber side. As a result, the temperature of the refrigerating chamber side evaporator 14a becomes low, and the air in the refrigerating chamber side evaporator chamber 8a can be cooled, that is, the refrigerating chamber 2 can be cooled.

Further, the suction chamber side suction pipe 55a is bonded to the refrigerating chamber side capillary tube 53a2 by brazing or soldering for heat exchange. If the heat exchange length of the suction pipe on the refrigerating chamber side is sufficient, it is not always necessary to bond them.

Further, when the three-way valve 52 is made to allow the refrigerant to flow to the outlet 52b side, the refrigerant flowing out from the outlet 52b is the capillary tubes 53b1, 53b2 on the freezer compartment side, the evaporator 14b on the freezer compartment side, the gas-liquid separator 54b, and the like. After flowing in the order of the freezing chamber side suction pipe 55b, the check valve 56, the refrigerant confluence portion 57, and the common suction pipe 55ab, the compressor returns to the compressor 24. The check valve 56 is arranged so that the refrigerant flows from the gas-liquid separator 54b to the refrigerant merging portion 57 side and does not flow from the refrigerant merging portion 57 to the gas-liquid separator 54b side. The low-pressure low-temperature refrigerant in the freezer chamber-side capillary tubes 53b1 and 53b2 flows through the freezer-side evaporator 14b, so that the freezer-side evaporator 14b becomes low-temperature and cools the air in the freezer-side evaporator chamber 8b. That is, the freezing chamber 7 can be cooled.

Further, the freezing chamber side suction pipe 55b is bonded to the freezing chamber side capillary tube 53b2 by brazing or soldering for heat exchange. If the heat exchange length of the suction pipe on the freezing chamber side is sufficient, it is not always necessary to bond them.

Further, the common suction pipe 55ab is bonded to the refrigerator chamber side capillary tube 53a1 and the freezer compartment side capillary tube 53b1 by brazing or soldering. Heat exchange is performed between the common suction pipe 55ab and the refrigerator chamber side capillary tube 53a1 and the freezing chamber side capillary tube 53b1. That is, these suction pipes 55a, 55b, 55ab are designed to raise the temperature of the refrigerant to a temperature close to the outside air temperature and then return the refrigerant to the compressor 24. This makes it possible to increase the cooling capacity.

As in the present embodiment, a part of the suction pipe 55a on the refrigerating room side and a part of the suction pipe 55b on the freezing room side are integrally configured and shared (shared suction pipe 55ab), so that the suction pipe is on the back of the refrigerator. It is possible to reduce the proportion of the pipes. As a result, not only the thermal influence on the refrigerator 1 can be suppressed, but also the fluidity of the urethane foam-injected as the heat insulating material R can be enhanced.

FIG. 5 is a cross-sectional view taken along the line CC of FIG. 2 when the refrigerator of FIG. 1 is cut.
As shown in FIG. 5, in the refrigerator 1, a plurality of lead wires 32 (harnesses) are arranged along the surface of the inner box 10b on the heat insulating space side (inside the refrigerator) such as the top plate 10b1 and the back plate 10b4. There is. These lead wires 32 are electrically connected (connected via a connector) to a control board 31 provided at the rear portion of the upper surface portion of the box body 10. Since the temperature inside the refrigerating room 2 has a smaller difference from the outside air temperature than the inside of the freezing room 7, the thickness of the heat insulating wall (foaming heat insulating material) of the refrigerating room 2 is the heat insulating wall (foaming) of the freezing room 7. It is formed thinner than the heat insulating material).

The lead wire 32A (32) connecting the control board 31 and the compressor 24 has a heat insulating partition wall 28 in which the back plate 10b4 of the refrigerating chamber 2 is directed away from the center in the left-right direction (width direction) (right direction). It extends so as to incline in the vertical direction to the height position of. The lead wire 32A extends from the height position of the heat insulating partition wall 28 to the height position of the heat insulating partition wall 29 with the back plate 10b4 of the freezing chamber 7 facing downward in the vertical direction. Then, the lead wire 32A extends from the height position of the heat insulating partition wall 29 to the back plate 10b4 of the vegetable compartment 6 downward in the vertical direction, extends into the machine room 39, and is connected to the compressor 24.

Further, the lead wire 32B (32) connecting the control board 31 and the defrost heater 21 separates the back plate 10b4 of the refrigerating chamber 2 from the center in the left-right direction (width direction) in the same manner as the lead wire 32A. (To the right), it extends so as to incline in the vertical direction to the height position of the heat insulating partition wall 28. The lead wire 32B extends from the height position of the heat insulating partition wall 28 to the height position of the defrost heater 21 with the back plate 10b4 of the freezing chamber 7 facing downward in the vertical direction.

Further, the control board 31 and the sensors 40 (refrigerator room side evaporator temperature sensor 40a, freezer room side evaporator temperature sensor 40b, refrigerating room temperature sensor 41, freezer room temperature sensor 42, vegetable room temperature sensor 43, freezing room door sensor). The lead wire 32C (32) connecting the freezer compartment door sensor (not shown), the freezer compartment door sensor (not shown), and the vegetable compartment door sensor (not shown) is the back plate 10b4 of the refrigerator compartment 2 in the left-right direction (width direction). It extends so as to incline with respect to the vertical direction to the height position of the heat insulating partition wall 28 toward the direction away from the center (to the left). The lead wire 32C extends downward from the height position of the heat insulating partition wall 28 to the back plate 10b4 of the freezing chamber 7 and the vegetable compartment 6 in the vertical direction. Further, the lead wire 32C extends toward the refrigerating chamber side evaporator temperature sensor 40a and the refrigerating chamber temperature sensor 41 at the height position of the refrigerating chamber 2. Further, the lead wire 32C extends toward the freezing chamber temperature sensor 42 at the height position of the freezing chamber 7. Further, the lead wire 32C extends toward the vegetable chamber temperature sensor 43 at the height position of the vegetable chamber 6.

Although not shown, the outside air temperature sensor 37 and the outside air humidity sensor 38 as other sensors are connected to the control board 31 along the top plate 10b1 of the inner box 10b. Further, the refrigerating room side fan 9a and the freezing room side fan 9b are low voltage (for example, 5V) devices and are connected to the control board 31 via lead wires.

As described above, the lead wires 32A and 32B of the high voltage system (power system) such as the compressor 24 and the defrost heater 21 are arranged on the right side with respect to the refrigerator 1. The lead wire 32C of the low voltage system (signal system) such as the sensors 40 is arranged to the left with respect to the refrigerator 1. Each lead wire 32 extending from the control board 31 is arranged along the back plate 10b4 of the refrigerating chamber 2, the freezing chamber 7, and the vegetable compartment 6 in a state of being grouped into a plurality of lead wires 32.

Specifically, electrical components located below the refrigerating room 2 (for example, defrost heater 21, freezing room temperature sensor 42, freezing room door sensor (not shown), vegetable room temperature sensor 43, vegetable room door sensor). A plurality of lead wires 32 from (not shown), etc.) are bundled in a substantially cylindrical shape by an adhesive tape such as vinyl tape or insulating tape. The bundled lead wires 32 are attached to the inner wall surface (back surface) of the inner box 10b by a fixing tape 34 along the back plate 10b4 on the freezing chamber 7 side. At this time, the height dimension of the lead wires 32 bundled in a cylindrical shape is 6 to 7 mm.

The fixing tape 34 may be any adhesive such as paper kraft tape or aluminum foil tape, and has heat resistance and surface slippage like PTFE tape made of fluororesin or Teflon (registered trademark). It may be excellent in sex. Further, the fixing tape 34 does not need to be provided with respect to the total length of the lead wire 32, and may be partially provided at a plurality of places (for example, the width of the fixing tape 34 is about 1 to 3 cm).

As shown in FIG. 5, the refrigerating room side suction pipe 55a, the freezing room side suction pipe 55b, and the shared suction pipe 55ab are arranged in the box body 10 and embedded in the heat insulating material R (urethane foam). In FIG. 5, the refrigerating chamber side suction pipe 55a, the freezing chamber side suction pipe 55b, and the shared suction pipe 55ab are shown by solid lines, and those located on the front side of these suction pipes 55a, 55b, 55ab in the front-rear direction are broken lines. It is shown by.

The refrigerating chamber side suction pipe 55a extends in the horizontal direction (from the right side to the left side) at the same height as the upper end of the refrigerating chamber side evaporator 14a, then bends in an arc shape and extends, and the refrigerating chamber side evaporator 14a It is connected to the refrigerant merging portion 57 on the back side of the above. The freezing chamber side suction pipe 55b extends upward in a substantially vertical direction above the freezing chamber side evaporator 14b and extends to the upper end of the heat insulating partition wall 28. Then, the freezing chamber side suction pipe 55b extends in the horizontal direction (from the right side to the left side), and then is connected to the refrigerating chamber side suction pipe 55a and the refrigerant confluence portion 57 on the back side of the refrigerating chamber side evaporator 14a. The common suction pipe 55ab connected to the refrigerant merging portion 57 extends upward in the vertical direction to the vicinity of the top plate 10b1. Then, the shared suction pipe 55ab bends and extends in the horizontal direction (left direction) opposite to the lead wires 32A and 32B, and extends downward in the vertical direction in the vicinity of the left side plate 10b3. The shared suction pipe 55ab extends downward in the vertical direction from the back plates 10b4 of the refrigerating room 2, the freezing room 7, and the vegetable room 6, and extends horizontally (from the left side to the right side) in the back plate 10b4 of the vegetable room 6. And extends into the machine room 39. The shared suction pipe 55ab extending into the machine room 39 is connected to a return port (not shown) of the compressor 24.

By the way, the suction pipe is formed to have a larger diameter than the capillary tube. Further, the space of the box body 10 is narrowly formed, and if the vacuum heat insulating material 25 (see FIG. 2) is provided, only one suction pipe (one diameter) can be arranged. Therefore, if the suction pipes are provided on the refrigerating chamber side evaporator 14a side and the refrigerating chamber side evaporator 14b side in separate cycles, the suction pipe on the refrigerating chamber side evaporator 14a side and the suction pipe on the freezing chamber side evaporator 14b side are provided. It is necessary to arrange the pipes so that they do not overlap each other, and the length (heat exchange length) cannot be obtained, so that sufficient heat exchange cannot be performed. Therefore, in order to increase the length of the suction pipe (heat exchange length), the heat exchange length is increased by combining the two suction pipes into one. When the shared suction pipe is arranged so as to intersect the lead wires 32A, 32B, 32C so as to surround the entire housing as shown by the two-dot chain wire (comparative example) in FIG. 5, the suction pipe and the lead wire are separated from each other. In the noise test, it was confirmed that the noise (noise terminal voltage) exceeded the specified value by direct or indirect contact.

Therefore, in the present embodiment, the refrigerating room side suction pipe 55a, the freezing room side suction pipe 55b, and the shared suction pipe 55ab are arranged as shown in FIG. That is, the shared suction pipe 55ab is arranged at a position above (closest to the control board 31) where the lead wire 32A connecting the compressor 24 and the control board 31 is deviated from the projection in the front-rear direction. .. In other words, the shared suction pipe 55ab is arranged so as not to overlap the lead wire 32A on the projection in the front-rear direction. That is, when the suction pipe is arranged at the position indicated by the two-dot chain line in FIG. 5, the shared suction pipe 55ab is placed in the front-rear direction and overlaps with the lead wires 32A and 32B, which causes a noise problem. Therefore, as shown by the solid line in FIG. 5, the noise problem is solved by arranging the shared suction pipe 55ab so as not to overlap the lead wires 32A and 32B in the front-rear direction.

Further, the suction chamber side suction pipe 55a is arranged at a position where the lead wires 32A and 32B are off the projection in the front-rear direction. Similarly, the lead wires 32A and 32B of the freezing chamber side suction pipe 55b are arranged at positions deviated from the projection in the front-rear direction. Even with such a configuration, the suction chamber side suction pipe 55a and the freezing chamber side suction pipe 55b can be separated from the lead wires 32A and 32B, so that the problem related to noise can be solved.

6A and 6B show a detailed view of a main part of FIG. 2, where FIG. 6A is the present embodiment and FIG. 6B is a comparative example.
In the comparative example shown in FIG. 6B, the gap S10 formed between the upper end of the back plate 10b4 of the inner box 10b where the common suction pipe 55ab is located and the outer box 10a is narrowly formed. Since the vacuum heat insulating material 25 is provided on the inner wall surface of the outer box 10a, the gap S10 is formed even narrower (to the extent that two shared suction pipes 55ab cannot be stacked and arranged in the thickness direction). .. Further, the lead wire 32C of the signal system extending from the control board 31 extends downward through a slight gap S10 formed between the shared suction pipe 55ab and the back plate 10b4, and is connected to the sensors provided below. Will be done. Therefore, the shared suction pipe 55ab may cross the lead wire 32C, and the shared suction pipe 55ab and the lead wire 32C may come into contact with each other to generate noise exceeding a specified value.

Therefore, in the present embodiment, as shown in FIG. 6A, the refrigerating chamber 2 side (inside the refrigerator) at a position where the shared suction pipe 55ab and the lead wire 32C overlap with the back plate 10b4 of the inner box 10b in the front-rear direction. ), The convex wall portion 10b5 is formed. The convex wall portion 10b5 includes a first surface portion 10b6 extending in the vertical direction (vertical direction) and a second surface portion 10b7 inclined rearward from the lower end of the first surface portion 10b6 in the vertical cross-sectional view of FIG. Has and is configured. As a result, the gap in front of the shared suction pipe 55ab is formed wider than in FIG. 6B.

In the lead wire 32C, the lead wire 32C is arranged along the inner wall surface of the convex wall portion 10b5. At this time, the lead wire 32C may be fixed to the inner wall surface of the convex wall portion 10b5 by using the fixing tape 34. As a result, the distance L between the shared suction pipe 55ab and the lead wire 32C can be widened as compared with the case where the convex wall portion 10b5 shown in FIG. 6B is not formed. As a result, contact between the shared suction pipe 55ab and the lead wire 32C can be prevented, and noise can be prevented from exceeding a specified value.

The convex wall portion 10b5 may be formed only at a position where the shared suction pipe 55ab and the lead wire 32C overlap each other in the front-rear direction. As a result, it is possible to prevent the capacity of the refrigerating chamber 2 from decreasing. However, the convex wall portion 10b5 may be formed over the entire width direction (left-right direction).

As described above, the refrigerator 1 of the present embodiment is a box body 10 composed of an inner box 10b, an outer box 10a, and a heat insulating material R formed between the inner box 10b and the outer box 10a. Have. Further, the refrigerator 1 has a compressor 24 arranged at the lower part of the box body 10, an outside radiator 50a for condensing the refrigerant discharged from the compressor 24, and a wall surface heat dissipation pipe 50b. Further, the refrigerator 1 has the refrigerator chamber side capillary tubes 53a1, 53a2 and the freezer compartment side capillary tubes 53b1, 53b2 for reducing the pressure of the refrigerant condensed by the outside heat dissipation device 50a and the wall surface heat dissipation pipe 50b. Further, the refrigerator 1 is arranged on the back surface of the box body 10, and the refrigerating room side suction pipe 55a, the freezing room side suction pipe 55b, and the refrigerating room side suction pipe 55a for returning the refrigerant from the refrigerating room side evaporator 14a and the freezing room side evaporator 14b to the compressor 24. It has a common suction pipe 55ab. Further, the refrigerator 1 has a shared heat exchange unit Q3 that exchanges heat between the refrigerator chamber side capillary tube 53a1 and the freezer compartment side capillary tube 53b1 and the shared suction pipe 55ab, and the refrigerator chamber side capillary tube 53a2 and the refrigerator compartment side suction pipe 55a. It has a refrigerating room side heat exchange unit Q1 for exchanging heat with and a freezer room side heat exchange unit Q2 and a freezing room side heat exchange unit Q2 for exchanging heat between the freezing room side capillary tube 53b2 and the freezing room side suction pipe 55b. Further, the refrigerator 1 is arranged in the upper part of the box body 10 and is arranged in the control board 31 for controlling the compressor 24, and is arranged in the box body 10 and is a lead wire for electrically connecting the compressor 24 and the control board 31. 32A and. The common suction pipe 55ab located at the upper part of the box body 10 is arranged at a position off the projection of the lead wire 32A in the front-rear direction. According to this, it is possible to prevent the shared suction pipe 55ab from coming into contact with the lead wire 32A, and it is possible to suppress the generated noise to a specified value or less.

Further, the refrigerator 1 of the present embodiment has a box body 10 composed of an inner box 10b, an outer box 10a, and a heat insulating material R formed between the inner box 10b and the outer box 10a. Further, the refrigerator 1 has a compressor 24 arranged at the lower part of the box body 10, an outside radiator 50a for condensing the refrigerant discharged from the compressor 24, and a wall surface heat dissipation pipe 50b. Further, the refrigerator 1 has the refrigerator chamber side capillary tubes 53a1, 53a2 and the freezer compartment side capillary tubes 53b1, 53b2 for reducing the pressure of the refrigerant condensed by the outside heat dissipation device 50a and the wall surface heat dissipation pipe 50b. Further, the refrigerator 1 is arranged on the back surface of the box body 10, and the refrigerating room side suction pipe 55a, the freezing room side suction pipe 55b, and the refrigerating room side suction pipe 55a for returning the refrigerant from the refrigerating room side evaporator 14a and the freezing room side evaporator 14b to the compressor 24. It has a common suction pipe 55ab. Further, the refrigerator 1 has a shared heat exchange unit Q3 that exchanges heat between the refrigerator chamber side capillary tube 53a1 and the freezer compartment side capillary tube 53b1 and the shared suction pipe 55ab, and the refrigerator chamber side capillary tube 53a2 and the refrigerator compartment side suction pipe 55a. It has a refrigerating room side heat exchange unit Q1 for exchanging heat with and a freezer room side heat exchange unit Q2 and a freezing room side heat exchange unit Q2 for exchanging heat between the freezing room side capillary tube 53b2 and the freezing room side suction pipe 55b. Further, the refrigerator 1 is arranged in a defrost heater 21 for heating the freezer chamber side evaporator 14b, a control board 31 which is arranged on the upper part of the box body 10 and controls the defrost heater 21, and is arranged in the box body 10. A lead wire 32B for electrically connecting the defrost heater 21 and the control board 31 is provided. The shared suction pipe 55ab located at the upper part of the box body 10 is arranged at a position off the projection of the lead wire 32B in the front-rear direction. According to this, it is possible to prevent the shared suction pipe 55ab from coming into contact with the lead wire 32B, and it is possible to suppress the generated noise to a specified value or less.

Further, the refrigerator 1 of the present embodiment has a box body 10 composed of an inner box 10b, an outer box 10a, and a heat insulating material R provided between the inner box 10b and the outer box 10a. Further, the refrigerator 1 has a compressor 24 arranged at the lower part of the box body 10, an outside radiator 50a for condensing the refrigerant discharged from the compressor 24, and a wall surface heat dissipation pipe 50b. Further, the refrigerator 1 has the refrigerator chamber side capillary tubes 53a1, 53a2 and the freezer compartment side capillary tubes 53b1, 53b2 for reducing the pressure of the refrigerant condensed by the outside heat dissipation device 50a and the wall surface heat dissipation pipe 50b. Further, the refrigerator 1 is arranged on the back surface of the box body 10, and the refrigerating room side suction pipe 55a, the freezing room side suction pipe 55b, and the refrigerating room side suction pipe 55a for returning the refrigerant from the refrigerating room side evaporator 14a and the freezing room side evaporator 14b to the compressor 24. It has a common suction pipe 55ab. Further, the refrigerator 1 has a shared heat exchange unit Q3 that exchanges heat between the refrigerator chamber side capillary tube 53a1 and the freezer compartment side capillary tube 53b1 and the shared suction pipe 55ab, and the refrigerator chamber side capillary tube 53a2 and the refrigerator compartment side suction pipe 55a. It has a refrigerating room side heat exchange unit Q1 for exchanging heat with and a refrigerating room side heat exchange unit Q1 and a refrigerating room side heat exchange unit Q2 for exchanging heat between the freezing room side capillary tube 53b2 and the freezing room side suction pipe 55b. Further, the refrigerator 1 is arranged in a sensor 40 for detecting various states of the box body 10, a control board 31 arranged on the upper part of the box body 10 and acquiring a detection signal from the sensors 40, and in the box body 10. A lead wire 32C for electrically connecting the sensors 40 and the control board 31 is provided. In the inner box 10b, a convex wall portion 10b5 that is convex toward the refrigerating chamber 2 is formed at a position where the shared suction pipe 55ab and the lead wire 32C overlap each other in the front-rear direction, and the lead wire 32C is formed along the inside of the convex wall portion 10b5. Is placed. According to this, the distance L between the shared suction pipe 55ab and the lead wire 32C can be widened, the contact between the shared suction pipe 55ab and the lead wire 32C is prevented, and the generated noise is suppressed to a specified value or less. Can be done.

Further, in the present embodiment, the convex wall portion 10b5 extends vertically from the first surface portion 10b6 extending in the vertical direction and extending from the lower end of the first surface portion 10b6 toward the back side (rear) in the front-rear direction. It is configured to have a second surface portion 10b7. According to this, for example, by making the angle obtuse than the case where the angle formed by the first surface portion and the second surface portion is 90 degrees or less in the cross-sectional view, the circumference of the heat insulating material R (urethane foam) is circumvented. Can be done well. As a result, it is possible to prevent the lead wire 32C and the shared suction pipe 55ab from coming into contact with each other due to the foaming pressure of the heat insulating material R.

Further, the refrigerator 1 of the present embodiment includes a box body 10 having a refrigerating chamber 2 and a freezing chamber 7 arranged vertically adjacent to each other, and a refrigerating chamber side evaporator 14a for generating cold air supplied to the refrigerating chamber 2. The freezing room side evaporator 14b for generating cold air supplied to the freezing room 7 is provided. Further, the refrigerator 1 includes a refrigerating room side suction pipe 55a provided in the refrigerating room 2, a freezing room side suction pipe 55b provided in the freezing room 7, the refrigerating room side suction pipe 55a, and the freezing room side suction pipe 55b. A common suction pipe 55ab for returning the refrigerant from the refrigerant merging portion 57 to the compressor 24 is provided. The refrigerant merging portion 57 is provided on the back surface of the refrigerator 14a on the refrigerating chamber side. According to this, the lead wires 32A and 32B are the shared suction pipe 55ab, the refrigerating chamber side suction pipe 55a, and the freezing chamber, as compared with the case where the refrigerant merging portion 57 is provided at the end in the left-right direction (see the two-dot chain wire in FIG. 5). It becomes easy to arrange the side suction pipe 55b so as not to overlap with the side suction pipe 55b in the front-rear direction.

FIG. 7 is a layout view of the suction pipe and the harness according to the modified example when viewed from the front side. The same components as those of the embodiments described in FIGS. 1 to 6 are designated by the same reference numerals, and duplicated description will be omitted. In this modification, contrary to the above embodiment, the lead wires 32A and 32B are arranged so that the suction pipes do not overlap in the front-rear direction.

As shown in FIG. 7, the lead wires 32A and 32B extend from the control board 31 to the right along the back plate 10b4, and are arranged so as to extend downward in the vertical direction at the right corner portion of the back plate 10b4.

The refrigerant merging portion 57A is located on the right side of the refrigerator room side evaporator 14a. Further, the common suction pipe 55ab extends vertically upward from the refrigerant confluence portion 57A, and horizontally extends to the left end of the back plate 10b4 at the upper portion (upper end portion) of the back plate 10b4.

By arranging the lead wires 32A and 32B along the peripheral edge portion of the back plate 10b4 in this way, it is possible to secure a wide area where the lead wires 32A and 32B can be arranged without overlapping the suction pipe in the front-rear direction. As a result, the suction pipes (freezing chamber side suction pipe 55b, shared suction pipe 55ab) can be arranged longer than the above-described embodiment, and the cooling capacity can be further increased.

Although the present embodiment has been described above with reference to the drawings, the present embodiment is not limited to the above contents and includes various modifications. In the above-described embodiment, the common suction pipe 55ab is provided at a position off the projection of the lead wires 32A and 32B in the front-rear direction, and the convex wall portion 10b5 is formed on the inner box 10b to form the lead wire 32C. A second configuration in which the pipes are arranged so as to be separated from the shared suction pipe 55ab and a case where the pipes are provided are described as an example. However, it is not limited to those having both the first configuration and the second configuration as described above, and may be one having only the first configuration among the first configuration and the second configuration, or the first configuration. Of the second configuration, only the second configuration may be provided.

Further, in the above-described embodiment, the case where the lead wires 32A and 32B are arranged on the right side and the lead wires 32C are arranged on the left side in the front view is described as an example (see FIG. 5), but the lead wires are arranged on the right side. The lead wires 32A and 32B may be arranged on the left side of 32C.

Further, the case where the lead wires 32A and 32B sides are not overlapped with the shared suction pipe 55ab on the projection in the front-rear direction has been described as an example, but the lead wires 32A and 32B sides have a convex wall portion (convex wall). A configuration in which the lead wires 32A and 32B are arranged so as to be separated from the shared suction pipe 55ab may be applied by providing a portion (corresponding to the portion 10b5).

1 Refrigerator 2 Refrigerator room 3 Ice making room 4 Upper freezer room 5 Lower freezer room 6 Vegetable room 7 Freezer room 10 Box body (insulated box body)
10a Outer box 10b Inner box 10b1 Top plate 10b2 Right side plate 10b3 Left side plate 10b4 Back plate 10b5 Convex wall part 10b6 First surface part 10b7 Second surface part 14a Refrigerator room side evaporator (evaporator)
14b Freezer room side evaporator (evaporator)
21 Defrost heater (heater)
24 Compressor 31 Control board (control device)
32, 32A, 32B, 32C Lead wire (harness)
40 Sensors 40a Refrigerator room side evaporator temperature sensor 40b Refrigerator room side evaporator temperature sensor 41 Refrigerator room temperature sensor 42 Freezer room temperature sensor 43 Vegetable room temperature sensor 50a Outside radiator (condenser)
50b Wall heat dissipation piping (condensor)
53a1, 53a2 Capillary tube on the refrigerator compartment side (capillary tube)
53b1, 53b2 Freezing room side capillary tube (capillary tube)
55a Refrigerator room side suction pipe (suction pipe)
55b Freezing room side suction pipe (suction pipe)
55ab Shared suction pipe (suction pipe)
57,57A Refrigerant confluence (confluence)
Q1 Refrigerator room side heat exchange section (heat exchange section)
Q2 Freezing room side heat exchange section (heat exchange section)
Q3 Shared heat exchange section (heat exchange section)
R insulation

Claims (4)

A heat insulating box body having an inner box, an outer box, and a heat insulating material formed between the inner box and the outer box.
The compressor placed at the bottom of the heat insulating box and
A condenser that condenses the refrigerant discharged from the compressor, and
A capillary tube that depressurizes the refrigerant condensed by the condenser, and
A suction pipe placed on the back surface of the heat insulating box and returning the refrigerant from the evaporator to the compressor,
A heat exchange unit that exchanges heat between the capillary tube and the suction pipe,
A control device arranged on the upper part of the heat insulating box and controlling the compressor,
A harness which is arranged in the heat insulating box and electrically connects the compressor and the control device is provided.
The heat insulating box body includes a refrigerating room and a freezing room arranged adjacent to each other on the upper and lower sides.
The evaporator includes a refrigerating chamber side evaporator that generates cold air to be supplied to the refrigerating chamber and a freezing chamber side evaporator that generates cold air to be supplied to the freezing chamber.
The suction pipe is a confluence portion where the refrigerating room side suction pipe provided in the refrigerating room, the freezing room side suction pipe provided in the freezing room, and the refrigerating room side suction pipe and the freezing room side suction pipe meet. And a shared suction pipe that returns the refrigerant from the confluence to the compressor.
The confluence is located on the back side of the refrigerator-side evaporator.
A refrigerator characterized in that the shared suction pipe located at the upper part of the heat insulating box is arranged at a position deviated from the projection in the front-rear direction of the harness. A heat insulating box body having an inner box, an outer box, and a heat insulating material provided between the inner box and the outer box.
The compressor placed at the bottom of the heat insulating box and
A condenser that condenses the refrigerant discharged from the compressor, and
A capillary tube that depressurizes the refrigerant condensed by the condenser, and
A suction pipe placed on the back surface of the heat insulating box and returning the refrigerant from the evaporator to the compressor,
A heat exchange unit that exchanges heat between the capillary tube and the suction pipe,
A defrost heater that heats the evaporator and
A control device arranged on the upper part of the heat insulating box and controlling the defrosting heater,
A harness that is arranged in the heat insulating box and electrically connects the defrosting heater and the control device is provided.
The heat insulating box body includes a refrigerating room and a freezing room arranged adjacent to each other on the upper and lower sides.
The evaporator includes a refrigerating chamber side evaporator that generates cold air to be supplied to the refrigerating chamber and a freezing chamber side evaporator that generates cold air to be supplied to the freezing chamber.
The suction pipe is a confluence portion where the refrigerating room side suction pipe provided in the refrigerating room, the freezing room side suction pipe provided in the freezing room, and the refrigerating room side suction pipe and the freezing room side suction pipe meet. And a shared suction pipe that returns the refrigerant from the confluence to the compressor.
The confluence is located on the back side of the refrigerator-side evaporator.
A refrigerator characterized in that the shared suction pipe located at the upper part of the heat insulating box is arranged at a position deviated from the projection in the front-rear direction of the harness. A heat insulating box body having an inner box, an outer box, and a heat insulating material formed between the inner box and the outer box.
The compressor placed at the bottom of the heat insulating box and
A condenser that condenses the refrigerant discharged from the compressor, and
A capillary tube that depressurizes the refrigerant condensed by the condenser, and
A suction pipe placed on the back surface of the heat insulating box and returning the refrigerant from the evaporator to the compressor,
A heat exchange unit that exchanges heat between the capillary tube and the suction pipe,
Sensors that detect various states of the heat insulating box and
A control device arranged on the upper part of the heat insulating box and acquiring a detection signal from the sensors, and a control device.
A harness that is arranged in the heat insulating box and electrically connects the sensors and the control device is provided.
The heat insulating box body includes a refrigerating room and a freezing room arranged adjacent to each other on the upper and lower sides.
The evaporator includes a refrigerating chamber side evaporator that generates cold air to be supplied to the refrigerating chamber and a freezing chamber side evaporator that generates cold air to be supplied to the freezing chamber.
The suction pipe is a confluence portion where the refrigerating room side suction pipe provided in the refrigerating room, the freezing room side suction pipe provided in the freezing room, and the refrigerating room side suction pipe and the freezing room side suction pipe meet. And a shared suction pipe that returns the refrigerant from the confluence to the compressor.
The confluence is located on the back side of the refrigerator-side evaporator.
A convex wall portion that is convex inside the refrigerator is formed at a position where the common suction pipe and the harness overlap in the front-rear direction on the upper portion of the inner box, and the harness is arranged along the convex wall portion. A refrigerator that features that. The convex wall portion is configured to have a first surface portion extending in the vertical direction and a second surface portion extending inclined rearward in the front-rear direction from the lower end of the first surface portion in a cross-sectional view. The refrigerator according to claim 3, wherein the refrigerator is characterized by the above.

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