WO2020134972A1

WO2020134972A1 - Refrigerator

Info

Publication number: WO2020134972A1
Application number: PCT/CN2019/123669
Authority: WO
Inventors: 山川贵志; 青木均史; 土田俊之
Original assignee: 青岛海尔电冰箱有限公司; 海尔智家股份有限公司; Aqua株式会社
Priority date: 2018-12-27
Filing date: 2019-12-06
Publication date: 2020-07-02
Also published as: JP2023070202A; JP2020106213A; CN113474602A; JP7287642B2

Abstract

Disclosed is a refrigerator (10) which can optimize the configuration of a vacuum heat insulating material (22) and a refrigerant pipe. The refrigerator (10) comprises: a heat insulating case body (11) provided with a storage chamber with an opening and comprising an outer case (15), an inner case (16) and a heat insulating material (17); and a refrigerant pipe comprising a frame pipe (42) configured along the opening and a connection pipe (40) continuously following the frame pipe (42). Inside is a space (43) formed between an inner case side panel (162) and an outer case side panel (152), and the heat insulating material (17) at least configured between the connection pipe (40) and the inner case (16) is a combined portion of the vacuum heat insulating material (22) and a foamed heat insulating material (23).

Description

refrigerator

Technical field

The present invention relates to a refrigerator, and in particular to a refrigerator having a frame tube for heating the periphery of an opening of a heat-insulating box.

Background technique

In a general refrigerator, a storage compartment is formed inside the heat-insulating box body, and the front opening of the storage compartment is opened or closed by opening or closing the heat-insulating door. The heat insulation box body includes an outer box, an inner box and heat insulation materials. The outer box is made of steel plate, the inner box is arranged inside the outer box and is made of synthetic resin board, and the heat insulation material is filled between the outer box and the inner box.

Generally, foamed polyurethane is used as the heat insulation material filled into the heat insulation box of the refrigerator. However, in order to cope with the further energy saving of the refrigerator, it is preferable to use a heat insulating material with higher heat insulation than foamed polyurethane.

Therefore, vacuum heat insulating materials are sometimes used as heat insulating materials built in the heat insulating box. Vacuum heat insulation material is made by vacuum packing fibrous inorganic materials such as glass wool, and its heat insulation effect is more than ten times higher than that of foamed polyurethane. The use of vacuum insulation materials can well insulate the storage room from the outside, reducing the amount of electricity required for the cooling operation of the refrigerator.

In addition, in a general refrigerator, in order to prevent condensation from forming around the opening of the heat-insulating box, a refrigerant pipe is usually arranged at the opening of the heat-insulating box, and a high-temperature refrigerant flows therein. The refrigerant tube is arranged at the opening of the heat-insulating box, and is called a frame tube. By providing the frame tube, the periphery of the opening of the heat-insulating box is heated to prevent condensation from forming in this part. Such a structure is described in, for example, Japanese Patent Laid-Open No. 7-239178, etc.

7 is a side view showing the refrigerator 100 having the vacuum insulation material 104 and the frame tube 108.

In the refrigerator 100, the inner box 102 is arranged inside the outer box 101, and a vacuum heat insulating material 104 and a foam heat insulating material 103 are arranged between the outer box 101 and the inner box 102. In addition, a freezer compartment 109 as a storage compartment is formed inside the inner box 102.

Around the opening of the freezer compartment 109, a frame tube 108 is arranged. When the refrigerator 100 is in cooling operation, the high-temperature refrigerant flows through the refrigerant tube 106 to the frame tube 108 to raise the temperature around the opening of the freezing compartment 109, thereby preventing condensation from occurring. The refrigerant flowing in the frame tube 108 flows through the refrigerant tube 106 to the expansion member and the evaporator.

Here, the refrigerant pipe 106 is arranged near the side 105 of the vacuum heat insulating material 104, and its front end extends from the front lower end of the outer box 101 and the inner box 102 to the front side. By forming a notch at the end of the outer tank 101 or the inner tank 102, an opening for guiding the refrigerant pipe 106 forward can be formed.

However, in the refrigerator 100 described above, there is no vacuum insulation material 104 between the refrigerant tube 106 and the freezing compartment 109. Between the refrigerant pipe 106 and the freezer compartment 109, there is only the foam insulation 103 having a heat insulation performance lower than that of the vacuum insulation 104. In addition, the refrigerant tube 106 is arranged along the inclined surface of the vacuum heat insulating material 104, that is, along the side 105. As a result, the refrigerant inside the refrigerant pipe 106 and the cold air inside the freezer compartment 109 inadvertently exchange heat through the metal film covering the side 105 of the vacuum heat insulating material 104.

As a result, the temperature of the refrigerant flowing in the refrigerant pipe 106 may decrease. If the temperature of the refrigerant flowing in the refrigerant tube 106 decreases, the refrigerant liquefies inside the refrigerant tube 106, and the refrigerant is insufficient in the evaporator (not shown), which may adversely affect the cooling performance of the refrigerator. .

In addition, the above heat exchange causes the temperature of the internal cold air in the freezing compartment 109 to rise, which may adversely affect the storability of the object to be stored stored in the freezing compartment 109. In addition, the time required for cooling the freezer compartment 109 and the amount of electricity also increase.

Summary of the invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a refrigerator that can optimize the relative arrangement of a vacuum insulation material and a refrigerant tube.

The refrigerator of the present invention includes: a thermally insulated box formed with a storage compartment having an opening; a refrigeration cycle that cools the air sent to the storage compartment; and a refrigerant tube in which the refrigerant of the refrigeration cycle flows; The heat insulation box includes an outer box, an inner box and heat insulation material, the outer box forms an outer surface of the heat insulation box, the inner box is arranged inside the outer box, and the heat insulation material is arranged in the outer box and the Between the inner boxes, the outer box includes: an outer box back panel extending along the width direction of the heat-insulating box body; and an outer box side panel extending along the depth direction of the heat-insulating box body; The inner box includes: an inner box back panel extending along the width direction of the heat-insulating box body; and an inner box side panel extending along the depth direction of the heat-insulating box body; the heat insulating material includes a configuration A vacuum insulation material and a foam insulation material between the outer box and the inner box, the refrigerant tube includes: a frame tube arranged along the opening of the heat insulation box; and The connecting tubes of the frame tubes are continuously arranged; the heat insulation material includes a combined part of the vacuum heat insulation material and the foam heat insulation material, and a separate foam heat insulation material part, on the side panel of the inner box and the outer box In the space formed between the side panels, at least the heat insulating material disposed between the connecting pipe and the inner box side panel is the combination of the vacuum heat insulating material and the foam heat insulating material section.

In addition, in the refrigerator of the present invention, the storage compartment is a freezer compartment.

Furthermore, in the refrigerator of the present invention, a spacer is disposed between the side of the vacuum insulation material and the outer box side panel on the opening side of the storage compartment.

The refrigerator of the present invention includes: a thermally insulated box formed with a storage compartment having an opening; a refrigeration cycle that cools the air sent to the storage compartment; and a refrigerant tube in which the refrigerant of the refrigeration cycle flows; The heat insulation box includes an outer box, an inner box and heat insulation material, the outer box forms an outer surface of the heat insulation box, the inner box is arranged inside the outer box, and the heat insulation material is arranged in the outer box and the Between the inner boxes, the outer box includes: an outer box back plate extending along the width direction of the heat-insulating box body; and an outer box side panel extending along the depth direction of the heat-insulating box body; The inner box includes: a back plate of the inner box extending along the width direction of the heat insulation box; and a side panel of the inner box extending along the depth direction of the heat insulation box; the heat insulation material includes A vacuum insulation material and a foam insulation material between the outer box and the inner box, the refrigerant tube includes: a frame tube, which is arranged along the opening of the heat insulation box body; and a frame A connecting pipe provided continuously by the tube; the heat insulation material includes a combined part of the vacuum heat insulation material and the foam heat insulation material, and a separate foam heat insulation material part, on the inner box side panel and the outer box side In the space formed between the panels, at least the heat insulating material disposed between the connecting pipe and the inner box side panel is the combined portion of the vacuum heat insulating material and the foam heat insulating material . Thus, according to the refrigerator of the present invention, there is provided a refrigerator that can optimize the arrangement of the vacuum insulation material and the refrigerant tube. Specifically, the heat insulating material disposed between the connecting pipe and the inner box side panel is a combination of the vacuum heat insulating material and the foam heat insulating material, thereby preventing the high-temperature refrigerant flowing inside the refrigerant pipe from The cold air inside the storage room was inadvertently exchanged. This can prevent the temperature inside the storage compartment from rising. In addition, it is possible to prevent the refrigerant flowing in the connecting pipe connecting the frame pipes from inadvertently liquefying, and thus it is possible to prevent the refrigerant from being insufficient in the evaporator.

In addition, in the refrigerator of the present invention, the storage compartment is a freezer compartment. When a refrigerant tube that flows a high-temperature refrigerant is arranged near the freezing compartment cooled to the freezing temperature region, unnecessary heat exchange may occur between the freezing compartment and the refrigerant tube, but the refrigerator of the present invention can prevent such heat exchange.

Furthermore, in the refrigerator of the present invention, a spacer is disposed between the side of the vacuum insulation material and the outer box side panel on the opening side of the storage compartment. Thus, according to the refrigerator of the present invention, by arranging the spacer between the front end portion of the vacuum heat insulating material and the outer box, the vacuum heat insulating material can be arranged toward the inner box side, and the vacuum heat insulating material and the refrigerant tube can be arranged Separated. This prevents heat exchange of the metal film constituting the surface of the vacuum heat insulating material.

BRIEF DESCRIPTION

1 is a side sectional view showing a refrigerator according to an embodiment of the present invention;

2 is a perspective view showing a heat insulation box of a refrigerator according to an embodiment of the present invention;

3 is a diagram showing a refrigerator according to an embodiment of the present invention, (A) is a perspective view showing a frame tube, (B) is a perspective view showing a refrigerant tube, a compressor, etc.;

4 is a diagram showing a refrigerator according to an embodiment of the present invention, (A) is a cross-sectional view of the middle portion of the refrigerator in the vertical direction, (B) is an enlarged cross-sectional view of (A);

5 is a view showing a refrigerator according to an embodiment of the present invention, (A) is a perspective view showing a spacer, (B) is a cross-sectional view showing a structure in which the spacer is assembled to a side vacuum insulation material, and (C) is a view A perspective view of the structure in which the spacer is assembled to the side vacuum insulation material;

6 is a diagram showing a refrigerator according to an embodiment of the present invention, (A) is a perspective view for showing a structure of a connecting pipe connected to a frame tube, and (B) is an upper cross-sectional view of an arrangement portion of the connecting pipe;

7 is a side view showing a structure in which refrigerant tubes are arranged in a refrigerator according to the background art.

Description of reference signs:

10. Refrigerator; 11. Insulated box; 12, Refrigerator; 13, Freezer; 14, Machine room; 15, Outer box; 151, Outer box back panel; 152, Outer box side panel; 16, Inner box; 161, back panel of inner box; 162, side panel of inner box; 17, insulation material; 19, peripheral part; 20, partition; 21, defrost heater; 22, side vacuum insulation material; 221, inclined side; 23, foam insulation material; 24, damper; 25, vacuum insulation material on the rear surface; 26, evaporator; 27, cooling chamber; 28, blower; 29, compressor; 30, spacer; 301, 1st Bonding surface; 302, second bonding surface; 31, adhesive tape; 32, aluminum tape; 33, thermal insulation partition wall; 34, thermal insulation door; 35, thermal insulation door; 36, condenser; 37, combination part; 38, Separate foam insulation part; 40, connecting tube; 401, connecting tube; 402, connecting tube; 42, frame tube; 43, space; 44, opening; 45, side heat dissipating tube; 50, dryer; 51 , On-off valve; 52, capillary tube; 100, refrigerator; 101, outer box; 102, inner box; 103, foam insulation material; 104, vacuum insulation material; 105, side; 106, refrigerant tube; 108, Frame tube; 109, freezer

detailed description

The refrigerator 10 according to the embodiment of the present invention will be described in detail based on the drawings. In the following description, the up-down direction indicates the height direction of the refrigerator 10, the left-right direction indicates the width direction of the refrigerator 10, and the front-back direction indicates the depth direction of the refrigerator 10. In addition, when describing this embodiment, in principle, the same members use the same symbols, and redundant descriptions are omitted.

Referring to Fig. 1, a schematic structure of the refrigerator 10 will be described. FIG. 1 is a side sectional view of the refrigerator 10.

In the refrigerator 10, inside the heat insulation box 11, the refrigerator compartment 12 and the freezer compartment 13 are formed as storage compartments. The front surface opening of the refrigerator compartment 12 is closed by the heat insulation door 34, and the front surface opening of the freezing chamber 13 is closed by the heat insulation door 35. The heat insulation door 34 and the heat insulation door 35 are, for example, revolving doors, and the right end is rotatably connected to the heat insulation box 11. The heat insulation door 34 and the heat insulation door 35 can be a sliding door or a split door.

A cooling chamber 27 is formed at the rear of the freezing chamber 13, and the cooling chamber 27 houses an evaporator 26. In addition, a machine room 14 is partitioned and formed behind the lowermost portion of the heat-insulating box 11, and a compressor 29 and the like are accommodated in the machine room 14.

Here, the evaporator 26 and the compressor 29 are connected to an expansion member and a condenser (not shown) via a refrigerant pipe to form a vapor compression refrigeration cycle. The compressor 29 compresses low-temperature and low-pressure refrigerant vapor into a high-temperature and high-pressure state. The condenser uses heat exchange between the refrigerant and the external ambient gas to absorb heat from the refrigerant to condense. The expansion member compresses the refrigerant to expand it. The evaporator 26 cools the inside air of the cooling chamber 27 by the heat exchange between the inside air of the cooling chamber 27 and the refrigerant. For example, isobutane (R600a) is used as the refrigerant in the refrigeration cycle.

A blower 28 is arranged above the cooling chamber 27, and the blower 28 sends the air inside the cooling chamber 27 after the evaporator 26 is cooled to the refrigerator compartment 12 and the freezer compartment 13. A damper 24 is inserted into the air duct of the refrigerator compartment 12. Here, a control device (not shown) detects a temperature sensor (not shown) in the refrigerator compartment of the refrigerator compartment to control the opening and closing of the damper 24. As a result, the flow rate of cold air in the refrigerator compartment 12 is adjusted to keep the temperature inside the refrigerator compartment 12 constant. Therefore, the refrigerating compartment 12 is cooled to the refrigerating temperature zone, and the freezing compartment 13 is cooled to the freezing temperature zone. In addition, the cold air that cools the refrigerator compartment 12 and the freezer compartment 13 returns to the cooling compartment 27. In Figure 1, the arrows indicate the flow of cold air. In addition, below the evaporator 26, a defrost heater 21 is arranged for melting frost of the evaporator 26.

The heat insulation box 11 includes an outer box 15, an inner box 16 and a heat insulation material 17. The outer box 15 forms the outer shape of the refrigerator 10 and is made of a steel plate; the inner box 16 is formed inside the outer box 15 and is made of a synthetic resin plate; and a heat insulating material 17 is filled between the outer box 15 and the inner box 16.

The heat insulation material 17 uses a foam heat insulation material and a vacuum heat insulation material. The foamed thermal insulation material is, for example, foamed polyurethane. The vacuum heat insulating material is made by storing a fiber assembly such as glass in a storage bag made of a metal film such as aluminum and evacuating the inside of the storage bag to a vacuum state. In this embodiment, as the vacuum heat insulating material, the side vacuum heat insulating material 22 and the vacuum heat insulating material 25 for the rear surface described later are used. In FIG. 1, the vacuum heat insulating material 25 for the rear surface is arranged near the rear surface of the heat insulating box 11. The side vacuum insulation material 22 and the vacuum insulation material 25 for the rear surface are plate-shaped vacuum insulation materials.

In addition, the heat insulating material 17 includes a combined portion 37 and a separate foamed heat insulating material portion 38. At the combined portion 37, the heat insulating material 17 is constituted by the foam heat insulating material 23 and the vacuum heat insulating material 25 for the rear surface. In the separate foam insulation material portion 38, only the foam insulation material 23 is used to constitute the insulation material 17.

FIG. 2 is a perspective view of the heat insulating box 11 viewed from above on the front side. Inside the heat insulation box 11, the refrigerator compartment 12 and the freezer compartment 13 are formed from top to bottom. The refrigerator compartment 12 and the freezer compartment 13 are partitioned by the heat insulation partition wall 33. In addition, a columnar partition 20 is formed at the front of the freezer compartment 13 and extends in the vertical direction. The partition 20 is formed in order to close the freezer compartment 13 by using the half heat insulating door 35 shown in FIG. 1.

The peripheral portion 19 is a region that surrounds the freezer compartment 13 on the front surface of the heat-insulating box 11 and is a part of the outer box 15. There is a large temperature difference between the external ambient air and the inside of the freezer compartment 13, and condensation may occur in the peripheral portion 19. In order to prevent condensation, the frame tube 42 shown in FIG. 3A is arranged inside the peripheral portion 19. In FIG. 2, a portion where the frame tube 42 described later is arranged is hatched.

With reference to FIG. 3, the structure of the refrigerant pipe for preventing the condensation of the opening 44 of the heat insulation box 11 will be described. FIG. 3A is a perspective view of the frame tube 42 as a part of the refrigerant tube viewed from above the front side. FIG. 3B is a perspective view of the compressor 29 and its surroundings viewed from the upper rear side.

Referring to FIG. 3A, the frame tube 42 is a part of the refrigerant tube through which the refrigerant for the refrigeration cycle flows, and is arranged inside the heat insulation box 11 along the peripheral portion 19 shown in FIG. 2. A part of the frame tube 42 is arranged along the partition 20. Here, the flow of the refrigerant inside the refrigerant tube is indicated by a solid arrow.

Both ends of the frame tube 42 are connected to the connection tube 40. The connection pipe 40 includes a connection pipe 401 and a connection pipe 402. The connection pipe 401 is a refrigerant pipe through which the refrigerant flowing into the frame pipe 42 flows. The connection pipe 402 is a refrigerant pipe through which the refrigerant flowing out of the frame pipe 42 flows.

Referring to FIG. 3B, the end of the connection tube 401 is connected to the side heat dissipation tube 45. In addition, the end of the connecting pipe 402 is connected to the dryer 50 and the on-off valve 51. The on-off valve 51 is used to prevent refrigerant from flowing into the evaporator 26 when the compressor is stopped. In addition, the outlet side of the on-off valve 51 is connected with a capillary 52 as a pressure reducing member.

Here, the flow of the refrigerant in the refrigeration cycle will be specifically described. The compressor 29 compresses the low-temperature and low-pressure refrigerant vapor returned from the evaporator 26 into a high-temperature and high-pressure state. The high-temperature and high-pressure refrigerant flows into the condenser 36 via the refrigerant pipe, for example, into the micro-channel condenser. The condenser 36 uses heat exchange between the refrigerant and the external ambient air to absorb heat from the refrigerant. The refrigerant that has passed through the condenser 36 is sent to the side radiator 45. The side heat dissipation pipe 45 is meanderingly formed along the left and right sides of the heat insulation box 11, and its outlet end is arranged at the lower right end. The end of the side heat pipe 45 is connected to the connection pipe 401, and the refrigerant passing through the side heat pipe 45 is sent to the frame pipe 42 via the connection pipe 401 shown in FIG. 3B. By flowing in the frame tube 42, the refrigerant heats the peripheral portion 19 shown in FIG. 2 and is sent to the dryer 50 and the on-off valve 51 via the connection tube 402. In the latter stage of the on-off valve 51, the capillary 52 as an expansion member compresses and expands the refrigerant. After passing through the capillary 52, the refrigerant is sent to the evaporator 26. The evaporator 26 cools the internal air in the cooling chamber 27 by heat exchange between the internal air in the cooling chamber 27 and the refrigerant. The refrigerant returns to the compressor 29 after passing through the evaporator 26.

4, the cross-sectional structure of the refrigerator 10 will be described. FIG. 4A is a cross-sectional view of the refrigerator 10 at an intermediate portion in the up-down direction, and FIG. 4B is an enlarged cross-sectional view showing an enlarged arrangement portion of the spacer 30 of FIG. 4A.

Referring to FIG. 4A, the outer box 15 is formed by bending a thin steel plate with a thickness of about 0.5 mm, and has an outer box back plate 151 and an outer box side panel 152 that extends from the left and right directions of the outer box back plate 151 The end extends forward. The outer box rear plate 151 and the outer box side panel 152 have a fitting structure, and are bonded to the foamed polyurethane as the heat insulating material 17 to form the outer box 15. The inner box 16 is made of synthetic resin, and has an inner box rear panel 161 and an inner box side panel 162 that extends forward from the left-right end of the inner box rear panel 161.

In the space 43 between the inner box side panel 162 and the outer box side panel 152, the side vacuum heat insulating material 22 is arranged so as to be in close contact with the inner box side panel 162. The side vacuum insulation material 22 extends from the vicinity of the front end of the inner box side panel 162 to the vicinity of the rear end of the inner box side panel 162, and is substantially in close contact with the outer surface of the inner box side panel 162. Here, some gaps may be formed between the outer surface of the inner box side panel 162 and the side vacuum insulation material 22.

In the space 43 between the inner box side panel 162 and the outer box side panel 152, the foam heat insulating material 23 is foam-filled to the outer portion in the width direction.

A side heat pipe 45 is arranged inside the outer box side panel 152. In addition, the frame tube 42 is arranged at the front end of the space 43. The side heat dissipation tube 45 is covered with an aluminum tape 32, and the aluminum tape 32 is attached to the inner surface of the side panel 152 of the outer box. In addition, the rear end of the side vacuum insulation material 22 is attached to the inner box rear plate 161 via an adhesive tape 31.

Referring to FIG. 4B, a spacer 30 is fixed at the front end of the side vacuum insulation material 22, and the spacer 30 is compressed between the side vacuum insulation material 22 and the outer box side panel 152. With this structure, the compressed spacer 30 generates a repulsive force to the right, that is, to the inside in the width direction.

The frame tube 42 contacts the outer box side panel 152 at the front end of the side heat pipe 45.

With reference to FIG. 5, a spacer 30 is described for restricting the position of the side vacuum insulation material 22. 5A is a perspective view showing the spacer 30, FIG. 5B is a cross-sectional view showing the structure in which the spacer 30 is mounted on the side vacuum insulation material 22, and FIG. 5C is a perspective view showing the overall structure in which the spacer 30 is mounted on the side vacuum insulation material 22. .

Referring to FIG. 5A, the spacer 30 has a substantially rectangular parallelepiped shape, and each corner is chamfered. When the spacer 30 is viewed from the front of the drawing, the spacer 30 has a cross-sectional shape in which the upper left portion is cut away. That is, the spacer 30 is formed with a first adhesive surface 301 and a second adhesive surface 302, the first adhesive surface 301 is a flat surface toward the left side of the drawing, and the second adhesive surface 302 is a flat surface toward the upper side of the drawing.

The spacer 30 is made of a foamed resin material such as foamed polyethylene. A foamed resin material is used as the spacer 30. When the spacer 30 is inserted into the space 43, the spacer 30 is properly compressed and deformed, and the side vacuum insulation material 22 can be pressed inward by the repulsive force generated by the spacer 30 at this time Box side panel 162.

Referring to FIG. 5B, on the drawing, the spacer 30 is installed at the lower end of the side vacuum insulation material 22. Specifically, the first bonding surface 301 of the spacer 30 is bonded to the lower end of the right side of the drawing of the side vacuum insulation material 22. In addition, the second bonding surface 302 of the spacer 30 is bonded to the right side portion of the lower end surface of the side vacuum insulation material 22 in the drawing. The side vacuum insulation material 22 and the spacer 30 are bonded with adhesive tape or adhesive.

Referring to FIG. 5C, the side vacuum heat insulating material 22 has a rectangular shape and is formed long in the up-down direction, and a plurality of spacers 30 are installed on the front side. In addition, an inclined side 221 is formed near the rear end of the side vacuum heat insulating material 22.

On the front side of the side vacuum heat insulating material 22, two spacers 30 are attached to the upper end and the lower end. By installing a plurality of spacers 30 on the side vacuum insulation material 22, the side vacuum insulation material 22 can be more stably positioned and assembled to the heat insulation box 11. The spacer 30 may be disposed on the rear side of the side vacuum insulation material 22.

Referring to FIG. 6, the related structure of the connecting pipe 40 and the side vacuum heat insulating material 22 will be described. 6A is a perspective view of the lower portion of the heat-insulating box 11 viewed from the right rear side. FIG. 6B is a top cross-sectional view showing the structure in which the connecting pipe 40 is arranged in the space 43 between the outer box side panel 152 and the inner box side panel 162.

As shown in FIG. 6A, the connection pipe 40 includes a connection pipe 401 and a connection pipe 402, and extends substantially horizontally from the rear end side of the heat insulation box 11 to the front end side. The front ends of the connecting tube 401 and the connecting tube 402 are connected to the frame tube 42. As shown in FIG. 3B, the rear end of the connection tube 401 is connected to the side heat dissipation tube 45. As shown in FIG. 3B, the rear end of the connecting tube 402 is connected to the capillary 52 via the dryer 50 and the on-off valve 51. In addition, the front end of the connecting tube 40 extends forward from the opening 44, and the opening 44 partially opens at the front peripheral portion of the inner box 16.

Referring to Fig. 6B, in the space 43 between the outer box side panel 152 and the inner box side panel 162, a side vacuum heat insulating material 22 and a connecting pipe 40 are arranged. In addition, the side vacuum insulation material 22 is disposed between the inner box side panel 162 and the connection pipe 40. As shown in FIG. 1, the heat insulating material 17 includes a combined portion 37 and a separate foamed heat insulating material portion 38, and the connecting pipe 40 is arranged in the combined portion 37.

The refrigerant flowing inside the connection pipe 40 passes through the side heat radiation pipe 45 shown in FIG. 3B and the temperature is relatively high. On the other hand, the freezing compartment 13 formed inside the inner box 16 is cooled to the freezing temperature zone. As a result, if the insulation between the connection pipe 40 and the inner box 16 is insufficient, the refrigerant flowing inside the connection pipe 40 may be unintentionally cooled and liquefied, which may result in insufficient refrigerant in the evaporator 26, making the refrigerator 10 Cooling performance is reduced.

In this embodiment, the side vacuum heat insulating material 22 is disposed between the inner box 16 and the connecting pipe 40, and its heat insulating property is ten times higher than that of the foamed polyurethane. Thus, the inner box 16 and the connection pipe 40 are well insulated. This prevents the refrigerant flowing inside the connecting pipe 40 from being inadvertently cooled and liquefied, and prevents the evaporator 26 from running out of refrigerant. In addition, the refrigerant flowing inside the connecting pipe 40 does not inadvertently heat the freezing compartment 13 formed inside the inner box 16.

In addition, referring to FIG. 6A, the side of the side vacuum insulation material 22 intersects the connection pipe 40. Specifically, a part of the lower side of the side vacuum heat insulating material 22 is the inclined side 221. On the other hand, the connecting pipe 40 extends horizontally backward. That is, the connecting pipe 40 is not arranged along the side of the side vacuum heat insulating material 22. Thereby, it is possible to prevent the heat exchange between the connection pipe 40 and the inner box 16 via the metal film that covers the inclined side 221 of the side vacuum heat insulating material 22. Therefore, the refrigerant is prevented from liquefying inside the connecting pipe 40, and it is possible to ensure that there is sufficient refrigerant in the evaporator 26.

In addition, referring to FIG. 4B, the spacer 30 presses the front end of the side vacuum insulation material 22 inward in the width direction. With this structure, the main surface of the side vacuum heat insulating material 22 can be separated from the connecting pipe 40. In addition, a foam insulation 23 is filled between the main surface of the side vacuum insulation 22 and the connection pipe 40. This prevents the heat from being inadvertently conducted through the metal film constituting the surface of the side vacuum heat insulating material 22, and prevents the heat exchange between the connection pipe 40 and the inner box 16.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be implemented within a range not departing from the gist of the present invention.

Claims

A refrigerator characterized by comprising: an insulated box forming a storage compartment having an opening; a refrigeration cycle to cool the air sent to the storage compartment; and a refrigerant pipe in which the refrigerant of the refrigeration cycle flows ; And

The heat insulation box includes an outer box, an inner box and heat insulation material, the outer box forms an outer surface of the heat insulation box, the inner box is arranged inside the outer box, and the heat insulation material is arranged Between the outer box and the inner box;

The outer box includes: a back plate of the outer box extending along the width direction of the heat-insulating box body; and a side panel of the outer box extending along the depth direction of the heat-insulating box body;

The inner box: the back plate of the inner box extending along the width of the heat-insulating box; and the side panel of the inner box extending along the depth of the heat-insulating box;

The refrigerant tube includes a frame tube and a connection tube continuously provided with the frame tube, the frame tube is arranged along the opening of the heat insulation box,

The thermal insulation material includes a combined portion of a vacuum thermal insulation material and a foam thermal insulation material, and a separate foam thermal insulation material portion,

In the space formed between the inner box side panel and the outer box side panel, the heat insulation material disposed at least between the connection pipe and the inner box side panel is the vacuum heat insulation The combined part of the material and the foam insulation material.
The refrigerator according to claim 1, wherein the storage compartment is a freezer compartment.
The refrigerator according to claim 1 or 2, wherein a spacer is disposed between the side of the vacuum insulation material and the outer box side panel on the opening side of the storage compartment.
The refrigerator according to claim 3, wherein a plurality of the spacers are arranged between the side of the vacuum insulation material and the side panel of the outer box.
The refrigerator according to claim 3, wherein the spacer is compressed between the vacuum insulation material and the outer box side panel.
The refrigerator according to claim 1, wherein in the depth direction of the heat insulation box, the vacuum heat insulation material extends from one end of the inner box side panel to the other of the inner box side panel One end.
The refrigerator according to claim 1, wherein in the space formed between the inner box side panel and the outer box side panel, the vacuum insulation material contacts the inner box side panel, The foam insulation material is filled between the vacuum insulation material and the connection pipe.
The refrigerator according to claim 7, wherein a side heat dissipation tube is arranged inside the outer box side panel, and the side heat dissipation tube is connected to one end of the connecting tube and attached to the outer box side panel The inner surface.
The refrigerator according to claim 1, wherein the side of the vacuum insulation material intersects the connecting pipe.
The refrigerator according to claim 9, characterized in that, in the depth direction of the heat insulation box, a part of the side of the vacuum heat insulation material is an inclined side, and the connecting pipe is along the heat insulation box The body extends in the depth direction.