JP2017156027A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which can prevent dew condensation by improving volume efficiency.SOLUTION: A refrigerator 1 comprises: a heat insulation box body 7 filled with a foaming heat insulation material 12 between an inner box 11 and outer box 10; a compressor 20 arranged outside the heat insulation box body 7, and operating a refrigeration cycle; an evaporator 21 which is arranged in a cold duct 30 formed along an inner face of the inner box 11, and generates cold air; and a suction pipe 23 which passes through the inside of the foaming heat insulation material 12, and connects the evaporator 21 and the compressor 20. The refrigerator also has an inside installation part 23a in which the suction pipe 23 is eccentrically arranged at the inner box 11 side in the foaming heat insulation material 12, and an outside installation part 23b which is eccentrically arranged at the outer box 10 side. The inside installation part 23a is arranged in the vicinity of an inlet part 11c in which the suction pipe 23 enters the foaming heat insulation material 12 from the evaporator 21, and the outside installation part 23b is arranged at an outlet part 7a in which the suction pipe 23 goes out toward the compressor 20 from the inside of the foaming heat insulation material 12.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a refrigerator including a suction pipe that connects an evaporator and a compressor.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a heat insulating box filled with a foam heat insulating material between an inner box having an opening on the front and an outer box covering the outside of the inner box. With the heat insulating box, a freezer room for freezing and storing stored items is formed in the upper part of the refrigerator, and a refrigerating room for storing stored items in a refrigerator is formed at the lower part of the refrigerator.

  The refrigerator also has a compressor and an evaporator. The compressor is arranged in the machine room outside the heat insulation box behind the refrigerator compartment and operates the refrigeration cycle. The evaporator is arranged on the back side of the freezer to generate cold air. The evaporator and the compressor are connected by a suction pipe passing through the foam insulation. The suction pipe enters the foamed heat insulating material from the evaporator through an inlet portion opening in the inner box. The suction pipe that has entered the foam heat insulating material extends downward through the central portion in the thickness direction of the foam heat insulating material, enters the machine room from the inside of the foam heat insulating material through the outlet, and is connected to the compressor.

  In the refrigerator having the above configuration, when the compressor is driven, the refrigeration cycle is operated, and the refrigerant evaporates in the evaporator, thereby generating cold air. The stored items in the freezer compartment are frozen and stored in the refrigerator compartment by the cold air. The refrigerant evaporated in the evaporator flows through the suction pipe and flows into the compressor. At this time, since the suction pipe is positioned at the central portion in the thickness direction of the foam heat insulating material, the suction pipe is prevented from contacting the inner box and the outer box. Thereby, the dew condensation on an inner box or an outer box can be prevented.

JP-A-5-322435 (2nd page, 3rd page, FIG. 1 and FIG. 2)

  In recent years, it has been desired to increase the volumetric efficiency of the refrigerator storage room, and the thickness of the foam insulation tends to be reduced. For this reason, according to the said conventional refrigerator, since the suction pipe is distribute | arranged to the center part of a foam heat insulating material, the distance with an inner box and an outer box becomes short. Since the suction pipe has a low temperature in the upstream portion in the vicinity of the inlet portion that enters the foam heat insulating material from the evaporator, if the distance from the outer box is shortened, condensation may occur on the outer box due to the cold heat of the suction pipe.

  Moreover, in the downstream part including the exit part which goes out toward the compressor from the foaming heat insulating material of the suction pipe, when the distance from the inner box becomes short, the temperature rise of the suction pipe is suppressed by the cold heat of the refrigerator compartment. Thereby, there exists a possibility that condensation may arise in the exit part vicinity of a suction pipe. In particular, when a compressor is disposed behind the freezer compartment, the temperature rise in the downstream portion of the suction pipe is further suppressed, so that condensation is more likely to occur near the outlet portion of the suction pipe.

  An object of this invention is to provide the refrigerator which can improve volumetric efficiency and can prevent dew condensation.

In order to achieve the above object, the present invention includes a heat insulating box filled with a foam heat insulating material between an inner box and an outer box, a compressor that is disposed outside the heat insulating box and operates a refrigeration cycle, An evaporator that is arranged in a cold air duct formed along the inner surface of the inner box and generates cold air, and a suction pipe that connects the evaporator and the compressor through the foam insulation. In the refrigerator
The suction pipe has an inner installation portion that is arranged to be biased toward the inner box side in the foam heat insulating material and an outer installation portion that is arranged to be biased to the outer box side,
The inner pipe is provided in the vicinity of an inlet portion where the suction pipe enters the foam insulation from the evaporator, and the outlet pipe exits from the foam insulation toward the compressor. It is characterized by providing an outer installation part.

  According to this configuration, when the compressor is driven and the refrigerant flowing into the evaporator is evaporated by the evaporator, cold air is generated. The refrigerant flowing out of the evaporator flows through the suction pipe and returns to the compressor. The cold air generated by the evaporator flows through the cold air duct and is discharged into the inner box.

  In the refrigerator having the above-described configuration, the present invention includes a first cooling chamber for storing stored items in a frozen state, and a second cooling chamber for storing stored items in a refrigerated state, and the compressor is disposed behind the first cooling chamber. It is preferable.

  According to the present invention, in the refrigerator having the above-described configuration, the refrigerator includes a first cooling chamber that stores a stored product in a frozen state, and a second cooling chamber that stores the stored product in a refrigerator. In addition, the suction pipe that has entered the foam insulation from the evaporator passes through the rear of the first cooling chamber, the rear of the second cooling chamber, the rear of the first cooling chamber, and the rear of the second cooling chamber. Preferably, a step portion between the inner installation portion and the outer installation portion is formed at the downstream end.

  In the refrigerator configured as described above, it is preferable that the suction pipe is provided so as to meander behind the second cooling chamber.

  Further, the present invention provides a refrigerator having the above-described configuration, comprising a capillary tube that is arranged in the refrigeration cycle and depressurizes the refrigerant, a fixing portion where the suction pipe is fixed to the capillary tube, and a non-adhesion separated from the capillary tube It is preferable that the step portion is provided in the non-fixed portion.

  According to the present invention, in the refrigerator having the above-described configuration, a pair of the capillary tubes through which the refrigerant flows in parallel is provided, and the fixed portion is formed by arranging the capillary tubes so as to face the peripheral surface of the suction pipe. It is preferable.

  According to the present invention, in the refrigerator having the above-described configuration, a pair of the capillary tubes through which the refrigerant flows in parallel is provided, and the fixed portion is formed by arranging the capillary tubes so as to face the peripheral surface of the suction pipe. It is preferable that the suction pipe is twisted in the circumferential direction at the non-fixed portion.

  According to the present invention, an inside installation portion of a suction pipe is provided in the vicinity of the inlet portion where the suction pipe enters the foamed heat insulating material from the evaporator, and is distributed in the foamed heat insulating material toward the inner box side. Thereby, the distance of the upstream part of the low temperature side of a suction pipe and an outer case can be enlarged. In addition, an outside installation portion of the suction pipe is provided at an outlet portion where the suction pipe exits from the foamed heat insulating material toward the compressor and is biased to the outer box side. Thereby, the distance with an inner box can be enlarged in the downstream part of the high temperature side of a suction pipe. Therefore, the thickness of the foam heat insulating material can be reduced to improve the volumetric efficiency of the refrigerator, and condensation on the outer box and the outlet can be prevented.

The front view which shows the refrigerator of 1st Embodiment of this invention. Sectional drawing on the right side showing the refrigerator according to the first embodiment of the present invention. The cycle figure which shows the refrigerating cycle of the refrigerator of 1st Embodiment of this invention. Sectional drawing which shows the suction pipe and capillary tube of the refrigerating cycle of the refrigerator of 1st Embodiment of this invention Sectional drawing which looked at the cross section which passes on the back wall of the heat insulation box of the refrigerator of 1st Embodiment of this invention from the back side. Sectional drawing on the right side showing the main part of the refrigerator according to the first embodiment of the present invention. The front view which shows the refrigerator of 2nd Embodiment of this invention. Sectional drawing on the right side showing the refrigerator of the second embodiment of the present invention Sectional drawing which looked at the cross section which passes on the back wall of the heat insulation box of the refrigerator of 2nd Embodiment of this invention from the back side. Sectional drawing of right side which shows the principal part of the refrigerator of 2nd Embodiment of this invention. The cycle figure which shows the refrigerating cycle of the refrigerator of 3rd Embodiment of this invention. The side view of the level | step-difference part of the suction pipe of the refrigerator of 3rd Embodiment of this invention The rear view of the level | step-difference part of the suction pipe of the refrigerator of 3rd Embodiment of this invention XX sectional view of FIG. YY sectional view of FIG.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG.1 and FIG.2 has shown the front view and right side sectional drawing of the refrigerator of 1st Embodiment. In this specification, the surface on which the door 2 a is provided (the surface on the opening side of the inner box 11) is the front surface of the refrigerator 1, and the surface opposite to the door 2 a with respect to the inner box 11 is the rear surface of the refrigerator 1. And Moreover, let the left side surface and the right side surface toward the door 2a be the left side surface and the right side surface of the refrigerator 1, respectively. The refrigerator 1 has a heat insulating box 7 filled with a foam heat insulating material 12 such as urethane foam between an outer box 10 formed of a coated steel plate and an inner box 11 formed of a resin molded product.

  A refrigerator compartment 2 (second cooling compartment) is formed in the upper part of the refrigerator 1 by the heat insulating box 7. The refrigerator compartment 2 stores stored food such as food in a refrigerator. In the lower part of the refrigerator compartment 2, a vegetable compartment 6 comprising an isolation compartment is arranged. The temperature in the vegetable compartment 6 is set higher than the upper temperature of the refrigerator compartment 2, and preserves vegetables etc. refrigerated.

  Below the vegetable compartment 6, an ice making room 5 (first cooling room) and a freezing room 4 (first cooling room) arranged side by side are arranged via a partition wall 11a filled with a heat insulating material. Below the freezer compartment 4 and the ice making chamber 5, a freezer compartment 3 (first cooling chamber) is arranged via a partition 40. The ice making room 5, the freezing room 4, and the freezing room 3 communicate with each other through the rear of the partition 40, and the volume of the freezing room 4 is smaller than the volume of the freezing room 3. The ice making room 5 stores ice made by an automatic ice making device (not shown), and the freezing rooms 3 and 4 store stored foods and the like in a frozen state.

  The front surface of the refrigerator compartment 2 is opened and closed by a rotating door 2a having a rotating shaft at the side end. A plurality of support portions (not shown) extending in the front-rear direction are provided on both side walls of the refrigerator compartment 2 so as to protrude vertically. A shelf 60 made of a transparent resin is detachably installed on each support portion, and stored items are placed on the shelf 60. A storage case 6 b is provided in the vegetable compartment 6.

  The front surface of the ice making chamber 5 is opened and closed by a drawer type door 5a that slides back and forth integrally with an ice storage case 5b (not shown). The front surfaces of the freezer compartments 3 and 4 are opened and closed by drawer-type doors 3a and 4a that slide in front and rear integrally with the storage cases 3b and 4b, respectively.

  A panel-like vacuum heat insulating material 14 is attached to the inner surface of the back plate 10a of the outer box 10 with a hot-melt adhesive or a double-sided adhesive tape. The vacuum heat insulating material 14 encloses a core material (not shown) such as glass fiber in a bag-like outer covering material 14a. The vacuum heat insulating material 14 is depressurized by vacuuming the inside of the jacket material 14a, and the end portion of the jacket material 14a is tightly sealed. The jacket material 14a is made of a laminated film including an aluminum vapor deposition film and has a gas barrier property. Since the vacuum heat insulating material 14 has a lower thermal conductivity than the foam heat insulating material 12, the heat insulating performance of the heat insulating box 7 can be improved.

  A machine room 19 is provided at the lower part of the heat insulating box 7 behind the freezer compartment 3. The bottom and back surfaces of the machine room 19 are covered with a bottom plate 19a and a back cover 19b, respectively. A compressor 20 that operates the refrigeration cycle is disposed in the machine room 19. Accordingly, the compressor 20 is disposed outside the heat insulating box 7 behind the freezer compartment 3.

  A back panel 35 is disposed on the back surface of the freezer compartment 3, and a cool air duct 30 extending vertically along the inner surface of the inner box 11 is formed between the back panel 35 and the inner box 11. The cold air duct 30 has a plurality of discharge ports 30 a that face the freezer compartment 4 and the ice making chamber 5, and a return port 30 b that faces the freezer compartment 3. Further, an evaporator 21 that generates cold air and a blower 15 that sends out cold air are disposed in the cold air duct 30. Thereby, the evaporator 21 is arranged on the back surface of the freezer compartment 3, and the compressor 20 is arranged on the opposite side of the refrigerator compartment 2 with the evaporator 21 interposed (in the present embodiment, below the evaporator 21). .

  A cold air duct 31 is connected to the upper side (downstream) of the cold air duct 30 via a damper 16. The cold air duct 31 is formed so as to extend vertically along the inner box 11 of the refrigerator compartment 2 and has a plurality of discharge ports 31 a facing the refrigerator compartment 2. In addition, a return passage (not shown) that connects the vegetable compartment 6 and the lower side of the evaporator 21 is formed. The cold air flowing through the vegetable compartment 6 returns to the lower side of the evaporator 21 through the return passage.

  FIG. 3 is a cycle diagram showing the refrigeration cycle of the refrigerator 1. The refrigeration cycle is operated by circulating the refrigerant in the direction of arrow B in the refrigerant pipe 29 by driving the compressor 20. A condenser 24 is connected to the refrigerant outflow side of the compressor 20, and an evaporator 21 is connected to the refrigerant inflow side via a suction pipe 23 made of a copper pipe. A dryer 25 and a capillary tube 22 are provided between the refrigerant outflow side of the condenser 24 and the refrigerant inflow side of the evaporator 21. As shown in FIG. 4, the capillary tube 22 is fixed on the peripheral surface of the suction pipe 23 by solder (not shown) or the like.

  In the refrigerator 1 configured as described above, when the compressor 20 is driven, the high-temperature and high-pressure gas refrigerant compressed by the compressor 20 condenses while releasing heat in the condenser 24. The high-temperature liquid refrigerant that has flowed out of the condenser 24 is depressurized by the capillary tube 22 after the moisture in the refrigerant is removed by the dryer 25, and becomes low pressure. The low-pressure liquid refrigerant flows into the evaporator 21, evaporates while absorbing heat from the air flowing through the cold air duct 30, and becomes a low-temperature gas refrigerant. Thereby, cold air is generated in the evaporator 21. Then, the gas refrigerant flows through the suction pipe 23 and returns to the compressor 20. Thereby, the refrigerant circulates and the refrigeration cycle is operated.

  At this time, since the capillary tube 22 is fixed on the peripheral surface of the suction pipe 23, heat exchange is performed between the capillary tube 22 and the suction pipe 23. That is, the high-temperature refrigerant flowing through the capillary tube 22 is cooled by the low-temperature refrigerant flowing through the suction pipe 23. Thereby, since the refrigerant | coolant which flows into the evaporator 21 is cooled beforehand, the energy saving property of the refrigerator 1 can be improved, improving the cooling capacity of the evaporator 21. FIG. At the same time, the refrigerant flowing through the suction pipe 23 is heated by the high-temperature refrigerant flowing through the capillary tube 22. Thereby, the refrigerant | coolant which flows in into the compressor 20 can be heated up previously, and the energy saving property of the refrigerator 1 can be improved.

  The cold air generated by the evaporator 21 flows through the cold air duct 30 by driving the blower 15 as shown by an arrow A (see FIG. 2), and enters the freezing chambers 3 and 4 and the ice making chamber 5 through the discharge port 30a. Discharged. The cold air flowing through the freezing chambers 3 and 4 and the ice making chamber 5 returns to the evaporator 21 through the return port 30b. As a result, the freezing rooms 3 and 4 and the ice making room 5 are cooled to the freezing temperature.

  A part of the cold air generated by the evaporator 21 flows through the cold air duct 31 through the damper 16 and is discharged into the refrigerator compartment 2 through the discharge port 31a. The cold air discharged into the refrigerator compartment 2 flows through the upper part of the refrigerator compartment 2, flows into the vegetable compartment 6, and returns to the evaporator 21 via the return passage. Thereby, the inside of the refrigerator compartment 2 including the vegetable compartment 6 is cooled to the refrigerator temperature.

  FIG. 5 shows a cross-sectional view of a cross section passing through the back wall 7c (see FIG. 2) of the heat insulating box 7 and parallel to the back plate 10a as viewed from the rear. FIG. 6 shows a side cross-sectional view of the main part of the refrigerator 1. The arrow C in FIGS. 5 and 6 indicates the flow direction of the refrigerant in the suction pipe 23. The suction pipe 23 enters the foam heat insulating material 12 from the joint portion with the evaporator 21 through the inlet portion 11c opened in the inner box 11, and enters the foam heat insulating material 21 through the outlet portion 7a opened in the outer box 10. To the compressor 20.

  Further, the capillary tube 22 enters the foam heat insulating material 12 from a position opposite to the compressor 20 in the machine room 19, and is fixed to the surface of the suction pipe 23 on the inner box 11 side along the suction pipe 23. The capillary tube 22 enters the cold air duct 30 through the opening 11 c while being fixed to the suction pipe 23, and is connected to the evaporator 21.

  The suction pipe 23 is formed to meander between the inlet portion 11c and the outlet portion 7a. That is, the suction pipe 23 extends rearward from the inlet portion 11c by a predetermined distance, then bends to the left and passes through the freezer compartment 4 and the ice making chamber 5, and bends upward and passes through the rear of the refrigerator compartment 2. The suction pipe 23 passing through the rear of the refrigerator compartment 2 bends downward above the vegetable compartment 6, passes behind the ice making compartment 5 and the freezer compartment 3, and enters the machine compartment 19 through the outlet 7a. When the suction pipe 23 enters from the rear of the vegetable compartment 6 to the rear of the ice making chamber 5, the suction pipe 23 is bent backward (back plate 10a side) behind the vegetable compartment 6. As a result, a step portion 23 c is formed in the suction pipe 23.

  Further, the suction pipe 23 has an inner installation portion 23a in an upstream portion including the vicinity of the inlet portion 11c, and an outer installation portion 23b in a downstream portion including the outlet portion 7a. The inner installation portion 23 a is arranged in a biased manner toward the front inner box 11 in the foam heat insulating material 12, and is arranged along the inner box 11. The outer installation part 23b is arranged in the foam heat insulating material 12 so as to be biased toward the rear outer box 10 (back plate 10a). The step part 23c is formed between the inner installation part 23a and the outer installation part 23b. The suction pipe 23 is close to the vacuum heat insulating material 14 on the downstream side of the step portion 23c (behind the ice making chamber 5 and the freezing chamber 3).

  For this reason, the distance D1 between the inner installation part 23a and the inner box 11 is smaller than the distance D3 between the outer installation part 23b and the inner box 11. Further, a distance D2 between the inner installation portion 23a and the outer box 10 (back plate 10a) is larger than a distance D4 between the outer installation portion 23b and the outer box 10 (back plate 10a).

  Thereby, since the upstream part of the suction pipe 23 in which the refrigerant temperature is low is arranged to be biased toward the front inner box 11, the distance from the outer box 10 (back plate 10 a) is increased to increase the distance on the outer box 10. Condensation can be prevented. Moreover, since the upstream part of the suction pipe 23 can transmit the cold heat of a refrigerant | coolant to the vegetable room 6 and the upper part of the refrigerator compartment 2, the energy saving property of the refrigerator 1 can be improved.

  In addition, since the downstream portion of the suction pipe 23 is biased toward the rear outer box 10 (back plate 10a), the distance from the inner box 11 is increased and the ice making chamber 5 and the freezing chamber 3 are affected by the cold heat. It becomes difficult. Thereby, the dew condensation on the exit part 7a and the outer box 10 can be prevented. Further, it is possible to reduce the temperature of the refrigerant flowing through the downstream portion of the suction pipe 23 heated by the capillary tube 22 from being transmitted to the ice making chamber 5 and the freezing chamber 3.

  According to the present embodiment, the inner installation portion 23a of the suction pipe 23 extends toward the front inner box 11 side in the foam heat insulating material 12 and extends along the inner box 11, and is provided in the upstream portion near the inlet portion 11c. Thereby, the distance of the upstream part by the side of the low temperature of the suction pipe 23 and the outer case 10 (back plate 10a) can be enlarged. Moreover, the outer side installation part 23b of the suction pipe 23 is arranged in the rear outer box 10 side, and is provided in the downstream part containing the exit part 7a. Thereby, the distance with the inner box 11 can be enlarged in the downstream part of the high temperature side of the suction pipe 23. FIG. Therefore, the thickness of the foam heat insulating material 12 can be reduced to improve the volumetric efficiency of the refrigerator 1, and condensation on the outer box 10 and the outlet portion 7a can be prevented.

  Moreover, even if the compressor 20 is arranged behind the freezer compartment 3, condensation on the outer box 10 and the outlet portion 7a can be prevented, so that the degree of freedom in designing the refrigerator 1 can be increased.

  Further, the suction pipe 23 passes through the rear of the ice making chamber 5 (first cooling chamber), the rear of the refrigerator compartment 2 (second cooling chamber), the rear of the ice making chamber 5, and the rear of the freezing chamber 3 (first cooling chamber). A step 23c between the inner installation portion 23a and the outer installation portion 23b is formed behind the refrigerator compartment 2. Thereby, the outer side installation part 23b is easily realizable, and the downstream part of the high temperature side suction pipe 23 can be easily separated from the ice making room 5 and the freezing room 3.

  Further, the suction pipe 23 meanders behind the refrigerating chamber 2, and a stepped portion 23 c is provided at an end portion on the downstream side behind the refrigerating chamber 2. Accordingly, the cold heat of the refrigerant in the suction pipe 23 can be sufficiently transmitted to the refrigerating chamber 2, and the downstream portion of the heated suction pipe 23 can be easily separated from the low-temperature freezing chamber 3 and the ice making chamber 5.

Second Embodiment
Next, a second embodiment of the present invention will be described. 7 and 8 show a front view and a right side sectional view of the refrigerator of the second embodiment, respectively. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In this embodiment, arrangement | positioning of the freezer compartment 3 and the vegetable compartment 6 differs from 1st Embodiment. Other parts are the same as those in the first embodiment.

  The refrigerator compartment 2 is formed in the upper part of the refrigerator 1 by the heat insulating box 7. Below the refrigerating room 2, an ice making room 5 and a freezing room 4 arranged side by side are arranged via a partition wall 11a filled with a heat insulating material. The freezer compartment 3 is arranged below the freezer compartment 4 and the ice making chamber 5 via a partition 40. The ice making room 5, the freezing room 4, and the freezing room 3 communicate with each other through the rear of the partition 40, and the volume of the freezing room 4 is smaller than the volume of the freezing room 3. Below the freezer compartment 3, a vegetable compartment 6 (second cooling compartment) is arranged via a partition wall 11b filled with a heat insulating material.

  The front of the vegetable compartment 6 is opened and closed by a drawer-type door 6a that slides back and forth integrally with the storage case 6b. The vegetable compartment 6 communicates with the refrigerator compartment 2 via a communication path (not shown). A return port 30 c is provided on the back of the vegetable compartment 6. The compressor 20 is provided behind the vegetable compartment 6 outside the heat insulating box 7.

  The cold air generated in the evaporator 21 by the operation of the refrigeration cycle flows through the cold air duct 30 and flows into the freezing chambers 3 and 4 and the ice making chamber 5 through the discharge port 30a. As a result, the freezing rooms 3 and 4 and the ice making room 5 are cooled to the freezing temperature.

  A part of the cold air flowing through the cold air duct 30 flows into the upper cold air duct 31 through the damper. The cold air flowing through the cold air duct 31 flows into the refrigerator compartment 2 through the discharge port 31a. Thereby, the stored item in the refrigerator compartment 2 can be refrigerated. The cold air that has circulated in the refrigerator compartment 2 flows into the vegetable compartment 6 via a communication path (not shown). Thereby, the stored item in the vegetable compartment 6 can be refrigerated at a temperature higher than the temperature of the refrigerator compartment 2. The cold air flowing through the vegetable compartment 6 flows into the lower part of the evaporator 21 through the return port 30c.

  FIG. 9 shows a cross-sectional view of a cross section passing through the back wall 7c (see FIG. 8) of the heat insulation box 7 and parallel to the back plate 10a as viewed from the rear. FIG. 10 shows a side cross-sectional view of the main part of the refrigerator 1.

  The suction pipe 23 is formed to meander between the inlet portion 11c and the outlet portion 7a. That is, the suction pipe 23 extends rearward from the inlet 11c by a predetermined distance, then bends upward, and passes through the rear of the freezer compartment 4 and the rear of the refrigerator compartment 2 in this order. The suction pipe 23 passing through the rear of the refrigerator compartment 2 bends downward above the freezer compartment 4 and passes behind the freezer compartments 4 and 3. The suction pipe 23 that has passed through the back of the freezer compartment 3 bends to the left behind the partition wall 11b, then bends downward, and passes behind the vegetable compartment 6. The suction pipe 23 passing through the rear of the vegetable compartment 6 extends rightward, then bends downward, and enters the machine compartment 19 through the outlet portion 7a.

  When the suction pipe 23 enters the rear of the freezer compartment 4 from the rear of the refrigerator compartment 2, the suction pipe 23 is bent rearward (back plate 10a side) behind the refrigerator compartment 2. As a result, a step portion 23 c is formed in the suction pipe 23.

  Since the downstream part including the outlet part 7a of the suction pipe 23 is arranged rearwardly (on the back plate 10a side), the distance from the inner box 11 is increased to make it less susceptible to the cold heat of the freezing chambers 3 and 4. . Thereby, the dew condensation on the exit part 7a and the outer box 10 can be prevented. Further, it is possible to reduce the transfer of the heat of the refrigerant flowing through the downstream portion of the suction pipe 23 heated by the capillary tube 22 to the freezer compartments 3 and 4.

  Moreover, the downstream part containing the exit part 7a of the suction pipe 23 is distribute | arranged behind the vegetable chamber 6 with high temperature. Thereby, the dew condensation on the exit part 7a and the outer box 10 can be further prevented.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, the downstream part containing the exit part 7a of the suction pipe 23 is distribute | arranged behind the vegetable chamber 6 with high temperature. Thereby, the dew condensation on the exit part 7a and the outer box 10 can be further prevented.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 11 shows a cycle diagram of the refrigeration cycle of the refrigerator of the third embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. This embodiment is different from the first embodiment in that a pair of capillary tubes 22a and 22b are arranged in the refrigeration cycle. Other parts are the same as those in the first embodiment.

  A switching valve 27 composed of a three-way valve is provided on the refrigerant outflow side of the dryer 25 of the refrigeration cycle. A pair of capillary tubes 22 a and 22 b made of copper tubes are connected in parallel to the refrigerant outflow side of the switching valve 27. The inner diameter of the capillary tube 22b is smaller than the inner diameter of the capillary tube 22a. Thereby, the distribution resistance of the refrigerant in the capillary tube 22b is larger than the distribution resistance of the refrigerant in the capillary tube 22a. The switching passage 27 can switch the refrigerant flow path to one or both of the capillary tubes 22a and 22b.

  For example, when the door 3a is opened for a long time and the temperature of the freezer compartment 3 or the like rises greatly, the refrigerant flow path is switched to the capillary tube 22a by the switching valve 27. Thereby, since a refrigerant | coolant distribute | circulates the capillary tube 22a with a small distribution | circulation resistance, many refrigerant | coolants can be supplied to the evaporator 21. FIG. Therefore, the freezer compartment 3 etc. can be cooled quickly. At this time, the refrigerant may be circulated through both the capillary tubes 22a and 22b.

  Further, for example, when the freezer compartment 3 or the like is sufficiently cooled and the compressor 20 is stopped and the door 3a or the like is not opened and the operation of the compressor 20 is resumed after a predetermined time has elapsed, the switching valve 27 As a result, the flow path of the refrigerant is switched to the capillary tube 22b. Thereby, the rotation speed of the compressor 20 is reduced and the refrigerant flows through the capillary tube 22b having a high flow resistance. Therefore, the work amount for discharging the refrigerant of the compressor 20 can be reduced, and the temperature of the freezer compartment 3 and the like can be kept low while reducing the power consumption.

  12 and 13 show a side view and a rear view of the stepped portion 23c of the suction pipe 23, respectively. 14 and 15 show an XX sectional view and a YY sectional view of FIG. 12, respectively. Note that an arrow C in FIGS. 12 and 13 indicates the flow direction of the refrigerant in the suction pipe 23. The flow direction of the refrigerant in the capillary tubes 22a and 22b is the reverse direction of the arrow C. Further, in FIG. 12, the left side and the right side respectively show the inner box 11 side and the outer box 10 (back plate 10a side).

  The suction pipe 23 has a fixed portion 23g fixed to the capillary tubes 22a and 22b and a non-fixed portion 23h separated from the capillary tubes 22a and 22b. At the fixing portion 23g, the capillary tubes 22a and 22b are soldered to face the peripheral surface of the suction pipe 23. Thereby, heat exchange with capillary tube 22a, 22b and the suction pipe 23 can be performed efficiently in the adhering part 23g.

  As shown in FIGS. 12 and 14, the pair of capillary tubes 22 a and 22 b are opposed to each other on the circumferential surface of the suction pipe 23 on the upstream side of the stepped portion 23 c. At this time, it is relatively easy to bend the suction pipe 23 in the left-right direction. However, it is difficult to bend the suction pipe 23 in the front-rear direction because the capillary tubes 22 a and 22 b are fixed to the suction pipe 23 in the front-rear direction. In addition, the inner diameter of the suction pipe 23 of the present embodiment is larger than when one capillary tube 22 is fixed to the suction pipe 23 as in the first embodiment. For this reason, it is more difficult to bend the suction pipe 23 in the front-rear direction at the fixing portion 23g.

  In this embodiment, the suction pipe 23 is twisted by 90 ° in the circumferential direction at the non-fixed portion 23h, and the stepped portion 23c that is stepped is provided at the non-fixed portion 23h. Since the capillary tubes 22a and 22b are not fixed to the suction pipe 23 in the non-fixed portion 23h, the stepped portion 23c can be easily formed.

  At this time, the step portion 23 c is provided at an end portion on the downstream side behind the refrigerator compartment 2. For this reason, even if the suction pipe 23 and the capillary tubes 22a and 22b are separated from each other by the non-fixed portion 23h, the suction pipe 23 is caused by the temperature rise in the refrigerator compartment 2 due to the heat of the capillary tubes 22a and 22b or the cold heat in the refrigerator compartment 2. It is possible to minimize a decrease in the temperature.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Further, the suction pipe 23 has a fixed portion 23g fixed to the capillary tubes 22a and 22b and a non-fixed portion 23h separated from the capillary tubes 22a and 22b, and a stepped portion 23c is provided in the non-fixed portion 23h. Thus, the step portion 23c can be easily realized while providing a pair of capillary tubes 22a and 22b to improve energy saving.

  In addition, the capillary tubes 22a and 22b are arranged facing the peripheral surface of the suction pipe 23 to form a fixing portion 23g. Thereby, heat exchange with capillary tube 22a, 22b and the suction pipe 23 can be performed efficiently in the adhering part 23g.

  Further, the suction pipe 23 is twisted by 90 ° in the circumferential direction at the non-fixed portion 23h. Thereby, even if it arrange | positions a pair of suction pipes 22a and 22b facing each other, the level | step-difference part 23c is easily realizable. In addition, the angle which twists the suction pipe 23 is not restricted to 90 degrees.

  In the second embodiment, the fixed portion 23g may be formed by arranging the capillary tubes 22a and 22b so as to face each other on the peripheral surface of the suction pipe 23. At this time, the suction pipe 23 may be twisted by 90 ° in the circumferential direction at the non-fixed portion 23h to form the stepped portion 23c.

  In the first embodiment and the second embodiment, the suction pipe 23 has a fixing portion 23g fixed to one capillary tube 22 and a non-fixing portion 23h separated from the one capillary tube 22, The step portion 23c may be provided in the non-fixed portion 23h. Thereby, the suction pipe 23 can be stepped more easily at the non-fixed portion 23h, and the stepped portion 23c can be formed more easily.

  If the non-fixed portion 23h is omitted, heat exchange between the suction pipe 23 and the capillary tube 22 can be further promoted. Therefore, in the case of a single capillary tube 22, the suction pipe 23 can be easily bent stepwise. It is more desirable to omit the fixing portion 23h.

  Moreover, in 1st Embodiment-3rd Embodiment, although the level | step-difference part 23c is provided between the inner side installation part 23a and the outer side installation part 23b, the level | step-difference part 23c is omitted and it goes to the exit part 7a from the inlet part 11c. Accordingly, the suction pipe 23 is made to be the foam heat insulating material 12 so that the distance between the suction pipe 23 and the outer box 10 (back plate 10a) gradually decreases (so that the distance between the suction pipe 23 and the inner box 11 gradually increases). You may arrange in.

  Moreover, in 1st Embodiment-3rd Embodiment, although the compressor 20 is distribute | arranged to the lower part of the refrigerator 1, you may distribute the compressor 20 to the upper part of the refrigerator 1, or an up-down direction center part.

  Further, in the first to third embodiments, the vacuum heat insulating material 14 may be omitted. In this case, the outer installation portion 23b of the suction pipe 23 is arranged at a predetermined distance (for example, 30 to 40 mm) away from the outer box 10 (back plate 10a). Thereby, the dew condensation on the outer box 10 can be prevented.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator provided with the suction pipe which connects an evaporator and a compressor.

1 Refrigerator 2 Refrigerated room (second cooling room)
2a, 3a, 4a, 5a, 6a Door 3, 4 Freezing room (first cooling room)
5 Ice making room (first cooling room)
6 Vegetable room 7 Heat insulation box 7a Outlet part 10 Outer box 11 Inner box 11a, 11b Partition wall 11c Inlet part 12 Foam heat insulating material 14 Vacuum heat insulating material 15 Blower 16 Damper 20 Compressor 21 Evaporator 22, 22a, 22b Capillary tube 23 Suction pipe 23a Inner installation part 23b Outer installation part 23c Stepped part 23g Adhering part 23h Non-adhering part 24 Condenser 25 Dryer 28 Radiation pipe 29 Refrigerant pipe 30, 31 Cold air duct 30a, 31a Discharge port

Claims (5)

Formed along the inner surface of the inner box, a heat insulating box filled with a foam heat insulating material between the inner box and the outer box, a compressor that is arranged outside the heat insulating box and operates a refrigeration cycle In a refrigerator comprising an evaporator that is arranged in a cold air duct to generate cold air, and a suction pipe that connects the evaporator and the compressor through the foam insulation,
The suction pipe has an inner installation portion that is arranged to be biased toward the inner box side in the foam heat insulating material and an outer installation portion that is arranged to be biased to the outer box side,
The inner pipe is provided in the vicinity of an inlet portion where the suction pipe enters the foam insulation from the evaporator, and the outlet pipe exits from the foam insulation toward the compressor. A refrigerator characterized in that an outer installation part is provided.   The first cooling chamber for storing stored items in a frozen state and the second cooling chamber for storing stored items in a refrigerated state, wherein the compressor is disposed behind the first cooling chamber. Refrigerator.   A first cooling chamber for storing stored items in a frozen state; and a second cooling chamber for storing stored items in a refrigerated state, wherein the evaporator is disposed on a back surface of the first cooling chamber, and the foam heat insulating material is provided from the evaporator. The suction pipe that has entered inside passes in the order of the rear of the first cooling chamber, the rear of the second cooling chamber, the rear of the first cooling chamber, and the inner installation portion at the downstream end of the rear of the second cooling chamber. The refrigerator according to claim 1, wherein a step portion with respect to the outer installation portion is formed.   A capillary tube for depressurizing the refrigerant disposed in the refrigeration cycle, wherein the suction pipe has a fixed portion fixed to the capillary tube, and a non-fixed portion separated from the capillary tube; The refrigerator according to claim 3, wherein the refrigerator is provided in a non-fixed portion.   A pair of the capillary tubes through which the refrigerant flows in parallel are provided, and the fixed portion is formed by arranging the capillary tube so as to face the peripheral surface of the suction pipe, and the suction pipe is surrounded by the non-fixed portion. The refrigerator according to claim 3 or 4, wherein the refrigerator is twisted in a direction.

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