refrigerator

Abstract

To provide a refrigerator in which an amount of heat intruding into the refrigerator through a front radiation pipe is reduced at a high level.SOLUTION: In a refrigerator where a refrigerating chamber is arranged upward and a freezing chamber and a vegetable chamber are arranged below and a front radiation pipe 305 is arranged to the front surface opening part of each of the chambers, the front radiation pipe 305 is structured so that the upstream side and the downstream side of a refrigerant flow in a freezing cycle are arranged together via the same side surface wall. Thereby, an amount of heat intruding into the refrigerator through the front radiation pipe 305 is efficiently reduced to improve cooling effect and achieve energy saving.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a refrigerator that prevents condensation at an opening of a main body of the refrigerator and reduces heat penetration into the refrigerator interior through heat radiation. [Background technology]

[0002] Patent Document 1 discloses a piping configuration of a refrigerator that prevents condensation at the opening of the refrigerator body while reducing heat penetration into the interior. The piping of this refrigerator is configured such that front heat dissipation pipe 503 is disposed at the front opening of refrigerator 500 other than the refrigerator compartment, and side heat dissipation pipes 502 disposed on the side walls of the refrigerator body are disposed at positions close to the front opening on both the left and right side walls. By piping in this manner, since front heat dissipation pipe 503 is not present at the front opening of the refrigerator compartment, the amount of heat penetrating into the refrigerator compartment can be reduced, and since the temperature inside the refrigerator compartment is in the plus temperature range, condensation can be prevented with a small heat source from side heat dissipation pipe 502 disposed close to the front opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-077615 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a refrigerator in which the amount of heat entering the refrigerator from a front heat dissipation pipe is reduced to an even greater extent. [Means for solving the problem]

[0005] The refrigerator according to the present disclosure is partitioned by an outer box, an inner box forming a storage compartment, and a heat-insulating partition wall, with a refrigerator compartment arranged at the top and a freezer compartment and a vegetable compartment arranged at the bottom, and a front heat dissipation pipe arranged at a front opening of the freezer compartment, the front heat dissipation pipe is arranged via the same side wall on both the upstream side and the downstream side of the refrigerant flow in the refrigeration cycle, and the front heat dissipation pipe is arranged in a front opening other than the front opening opposite to the same side wall through which the front heat dissipation pipe is arranged on both the upstream side and the downstream side. The side heat dissipation pipe disposed on the side wall of the other side different from the side on which the front heat dissipation pipe is disposed is disposed forward of the side heat dissipation pipe disposed on the side wall of the side on which the front heat dissipation pipe is disposed. It is configured as follows. Effect of the Invention

[0006] In the refrigerator disclosed herein, both the upstream and downstream sides of the refrigerant flow of the front heat dissipation pipe in the refrigeration cycle are arranged via the same side wall, so that heat entering the freezer compartment from the front heat dissipation pipe arranged in the front opening only comes from the front heat dissipation pipe arranged on one side wall surface, efficiently reducing the amount of heat entering the freezer compartment, improving the cooling effect and further saving energy. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing an appearance of a refrigerator according to a first embodiment. [Diagram 2] FIG. 1 is a vertical cross-sectional view of a storage unit according to a first embodiment. [Diagram 3] Refrigeration cycle diagram of the refrigerator in embodiment 1 [Figure 4] Cooling system piping diagram of a refrigerator in embodiment 1 [Figure 5A] Cross-sectional plan view along line AA in Figure 4 [Figure 5B] Cross-sectional plan view along line BB in Figure 4 [Figure 5C] Cross-sectional plan view along line CC in Figure 4 [Figure 5D] Cross-sectional plan view along line DD in Figure 4 [Figure 6] A cooling system piping diagram showing a conventional refrigerator DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (The knowledge and other information that formed the basis of this disclosure) At the time when the inventors came up with the present disclosure, there was a refrigerator described in Patent Document 1. This refrigerator can reduce the amount of heat entering the refrigerator compartment and at the same time prevent condensation from adhering to the front opening of the refrigerator compartment, but the piping specifications of the above Patent Document 1 have a double piping configuration in which front heat dissipation pipe 503 and side heat dissipation pipe 502 are located close to each other near the opening of the freezer compartment, and this increases the amount of heat entering the freezer compartment, resulting in a decrease in cooling efficiency.

[0009] In addition, the front heat dissipation pipe 503 of the partition wall under the refrigerator compartment is configured to bridge the left side and the right side, so one or three heat dissipation pipes (turned twice inside the partition wall) are arranged inside the partition wall between the refrigerator compartment and the freezer compartment. When there is one heat dissipation pipe inside the partition wall, the temperature of the front opening of the partition wall cannot be secured and condensation may occur, and when there are three heat dissipation pipes inside the partition wall, the amount of heat entering the refrigerator compartment above the partition wall and the freezer compartment below the partition wall increases, reducing the cooling effect of the refrigerator. In other words, there is still room for improvement in terms of reducing the amount of heat entering the freezer compartment and the refrigerator compartment while preventing condensation from adhering to the front opening of the refrigerator compartment. The inventors found such a problem and came to configure the subject of the present disclosure in order to solve the problem.

[0010] Therefore, the present disclosure provides a refrigerator in which a portion of the front heat dissipation pipe arranged near the opening is eliminated, thereby more significantly reducing the amount of heat entering through the opening.

[0011] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or duplicate explanation of substantially the same configuration may be omitted. This is to avoid the following explanation becoming more redundant than necessary and to facilitate understanding by those skilled in the art.

[0012] It should be noted that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0013] [1-1. Configuration] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 5D.

[0014] Fig. 1 is a perspective view showing the exterior of refrigerator 100, and Fig. 2 is a vertical cross-sectional view of refrigerator 100. Refrigerator 100 is composed of outer box 111 made of metal (e.g., iron plate), inner box 112 made of hard resin (e.g., ABS), vacuum insulation material 115 attached to outer box 111, and foam insulation material 117 (e.g., hard urethane) filled between outer box 111 and inner box 112.

[0015] Refrigerator 100 has multiple storage compartments, including a refrigerator compartment 200, a switchable compartment 201, an ice-making compartment 202, a freezer compartment 203, and a vegetable compartment 204, and these compartments are opened and closed by doors 101, 102, 103, 104, and 105, respectively.

[0016] The refrigerator compartment 200 is set to a refrigeration temperature zone where the stored items do not freeze, for refrigerated storage. The vegetable compartment 204 is set to a temperature zone slightly higher than the refrigerator compartment 200, which is suitable for storing vegetables. The freezer compartment 203 is set to a freezing temperature zone for frozen storage. The temperature zone of the switchable compartment 201 can be switched to a desired temperature zone from among multiple temperature zones by the user.

[0017] Moreover, refrigerator 100 includes a first machine room 205 located at the top of refrigerator 100, a second machine room 207 located at the bottom of refrigerator 100, and a cooling room 208 located at the rear of refrigerator 100. Cooling room 208 houses a cooler 209 that generates cold air, a defrosting heater that removes frost adhering to cooler 209, and the like.

[0018] The first machine chamber 205 houses a compressor 206, an outer condenser (described later), etc. The second machine chamber 207 houses a defrosting tray (not shown), a defrosting fan (not shown), etc.

[0019] Fig. 3 is a diagram of the refrigeration cycle of this refrigerator. Refrigerator 100 incorporates refrigeration cycle 300 shown in Fig. 3. Refrigeration cycle 300 includes compressor 206, outer condenser 301 disposed in the machine room, back heat radiation pipe 302 disposed in the back wall, side heat radiation pipe 303 disposed in the side wall, bottom heat radiation pipe 304 disposed in the bottom wall, front heat radiation pipe 305 disposed in the front opening, second back heat radiation pipe 308, capillary tube 306, and cooler 209, which are connected in a ring shape.

[0020] Figure 4 is a piping diagram of the cooling system of this refrigerator.

[0021] The front heat dissipation pipe 305 is connected to the bottom heat dissipation pipe 304 in the second machine compartment 207, and extends to the front opening at the front, passing through the lower part of the left side wall 114. Then, it passes through the flange on the left side of the lowest vegetable compartment 204, turns inside the partition wall 210 (see FIG. 2, the same below) between the vegetable compartment 204 and the freezer compartment 203 located at the top, passes through the left side of the freezer compartment 203, turns inside the partition wall 210 between the freezer compartment 203 and the ice making compartment 202 and the switchable compartment 201 located at the top, returns to the left side of the front opening, passes through the left side of the ice making compartment 202, turns inside the partition wall 210 that separates the upper refrigerator compartment 200 from the top, and passes through the left side wall 114 to be led into the second machine compartment 207.

[0022] That is, front heat dissipation pipe 305 at the front opening is disposed below partition wall 210 under refrigerator compartment 200 at the front openings of switchable compartment 201, ice-making compartment 202, freezer compartment 203 and vegetable compartment 204. This front heat dissipation pipe 305 is disposed via the same side wall on both upstream side a and downstream side b of the refrigerant flow in the refrigeration cycle, and is not routed to one of the left and right side walls (right side wall 113 in this embodiment).

[0023] In other words, the front heat dissipation pipe 305 of the front opening is arranged on the left side flanges of the switchable compartment 201, ice-making compartment 202, freezer compartment 203 and vegetable compartment 204 below the partition wall 210 under the refrigerator compartment 200, but is not arranged on the right side flanges.

[0024] The front heat dissipation pipe 305 is connected to a second back heat dissipation pipe 308 (see FIG. 3, not shown in FIG. 4) in the second machine room 207. The second back heat dissipation pipe 308 is disposed on the rear wall and connected to a dryer (not shown) in the first machine room 205, and constitutes a cooling system connected to the compressor 206 via a capillary tube 306 and a cooler 209.

[0025] On the other hand, the side heat dissipation pipe 303 is connected to the back heat dissipation pipe 302 in the second machine room 207, then passes through the lower side wall, is arranged inside the side wall, and is arranged inside the top wall of the refrigerator 100, thereby bridging to the opposite side wall. Then, it is arranged inside the opposite side wall, and is connected to the bottom heat dissipation pipe 304 from the lower side wall in the second machine room 207.

[0026] In other words, side heat dissipation pipe 303 is arranged on right side wall 113 and left side wall 114 of outer box 111, and the upstream portion of side heat dissipation pipe 303 is arranged closer to the front opening side than the center in the depth direction of right side wall 113, and downstream piping is formed toward the rear so as to flow the refrigerant in the height direction of refrigerator 100.

[0027] Then, the piping passes through the top wall, is disposed on the left side wall 114, and is formed so that the refrigerant flows in the height direction of the refrigerator 100 from the rear in the depth direction toward the front opening side.

[0028] Here, the side heat dissipation pipe 303 arranged on the right side wall 113 where the front heat dissipation pipe 305 is not arranged has an opening side arrangement part 307 arranged near the front opening of the freezer compartment 203, and the opening side arrangement part 307 is arranged further forward than the side heat dissipation pipe 303a arranged on the side wall (left side wall 114) on the side where the front heat dissipation pipe 305 is arranged. As a result, only the opening side arrangement part 307 of the side heat dissipation pipe 303 is located near the right openings of the freezer compartment 203 and the switchable compartment 201, and only the front heat dissipation pipe 305 is located near the left openings.

[0029] The piping of the side heat dissipation pipe 303a connecting from the opening side installation portion 307 to the refrigerator compartment 200 side is disposed at a position shifted rearward from the front opening, similar to the side heat dissipation pipe 303 disposed on the left side wall 114.

[0030] Side heat dissipation pipe 303 and front heat dissipation pipe 305 disposed on left side wall 114 are disposed so as not to cross or come close to each other, thereby preventing heat exchange between the heat dissipation pipes.

[0031] FIG. 5A is a cross-sectional plan view taken along line AA in FIG.

[0032] No front heat radiation pipe 305 is provided at the front opening on the left side of the refrigerator compartment 200.

[0033] The side heat dissipation pipe 303 on the left side wall 114 is fixed to the left side wall 114 with aluminum tape or the like and is disposed in a groove of the vacuum insulation material 115 attached to the left side wall 114, shifted rearward from the front opening.

[0034] FIG. 5B is a cross-sectional plan view taken along line BB in FIG.

[0035] No front heat radiation pipe 305 is provided at the front opening on the right side of the refrigerator compartment 200.

[0036] The side heat dissipation pipe 303 (303a) of the right side wall 113 is fixed to the right side wall 113 with aluminum tape or the like, as on the left side, and is arranged in a groove of the vacuum insulation material 115 attached to the right side wall 113, shifted rearward from the front opening.

[0037] FIG. 5C is a cross-sectional plan view taken along line CC in FIG.

[0038] A front heat radiation pipe 305 on the left side of the freezer compartment 203 is fixed to a flange portion 116 of the outer box 111, so that the distance between the heat radiation pipe and the inside of the freezer compartment 203 is made as large as possible.

[0039] FIG. 5D is a cross-sectional plan view taken along line DD in FIG.

[0040] The side heat dissipation pipe 303 has an opening side installation portion 307 arranged near the front opening of the freezer compartment 203, and the opening side installation portion 307 is arranged further forward than the side heat dissipation pipe 303 (see Figure 5C) arranged on the left side wall 114.

[0041] Furthermore, the opening side installation portion 307 is arranged forward of the front end portion of the vacuum insulation material 115 attached to the right side wall 113 .

[0042] Also, the opening side installation part 307 is fixed to the flange part 116 of the outer box 111, like the front heat radiation pipe 305 on the left side of the freezer compartment 203, to make the distance between the heat radiation pipe and the inside of the freezer as large as possible.

[0043] [1-2. Operation] The effects of the refrigerator configured as above will be described. In this refrigerator, both upstream side a and downstream side b of the refrigerant flow in the refrigeration cycle of front heat radiation pipe 305 are arranged on left side wall 114, i.e., on the same side wall, so that the amount of heat entering each room such as freezer compartment 203 and switchable compartment 201 from front heat radiation pipe 305 can be reduced compared to a conventional refrigerator in which upstream side a and downstream side b are arranged separately on the left and right side walls and in a double piping state with the side heat radiation pipe.

[0044] That is, according to the configuration of the present embodiment in which both the upstream side a and downstream side b of the front heat radiation pipe 305 are arranged on the same side wall, the front heat radiation pipe 305 arranged on one side wall of the refrigerator (right side wall 113 in the present embodiment) is eliminated, so that heat intrusion from the front heat radiation pipe 305 arranged on the front opening into the freezer compartment 203 and the switchable compartment 201 occurs only from the front heat radiation pipe 305 arranged on one side wall surface (left side wall 114 in the present embodiment), and the amount of heat intrusion into the freezer compartment 203 and the like is greatly reduced more than ever before. And, in the present embodiment, the left side wall 114 on which the upstream side a and downstream side b of the front heat radiation pipe 305 are arranged also has the side heat radiation pipe 303 located rearward of the downstream side b of the front heat radiation pipe 305, so that the heat intrusion from the side heat radiation pipe 303 can be reduced to a negligible level.

[0045] In addition, the left side wall 114 on which the front heat dissipation pipe 305 is provided has a vacuum insulation material 115 provided between the outer box 111 and the inner box 112, and the vacuum insulation material 115 is arranged on the inside of the cabinet for at least a part of the front heat dissipation pipe 305 passing through the left side wall 114. Therefore, the vacuum insulation material 115 can reduce the heat entering from the front heat dissipation pipe 305 arranged on both the upstream side a and the downstream side b of the side wall.

[0046] Moreover, since front heat dissipation pipe 305 at the front opening is disposed below partition wall 210 below refrigerator compartment 200, it is possible to reduce the amount of heat entering the refrigerator from front heat dissipation pipe 305 disposed in partition wall 210, that is, from the front lower opening of refrigerator compartment 200 into refrigerator compartment 200. Moreover, in this embodiment, since there are two front heat dissipation pipes 305 disposed in partition wall 210 instead of one or three as in the conventional case, it is possible to reduce the amount of heat entering refrigerator compartment 200 while ensuring the dew condensation prevention effect on the front portion of partition wall 210 below refrigerator compartment 200.

[0047] In addition, condensation prevention at the front opening on the left side wall 114 side of the freezer compartment 203 and the switching compartment 201 is performed by a front heat dissipation pipe 305, and condensation prevention at the front opening on the right side wall 113 side is performed by electrically conductive heat from a side heat dissipation pipe 303 arranged on the right side wall 113.

[0048] At this time, the side heat dissipation pipe 303 arranged on the right side wall 113, i.e., the side heat dissipation pipe 303 arranged on the other side (right side wall 113) different from the side (left side wall 114) on which the front heat dissipation pipe 305 is arranged, has an opening-side arrangement part 307, which is arranged forward of the side heat dissipation pipe 303 on the side on which the front heat dissipation pipe 305 is arranged, so that the rate at which heat dissipated from the opening-side arrangement part 307, which is upstream of the refrigerant flow, is transferred through the side wall of the outer box 111 and reaches the front opening is significantly improved. Therefore, condensation on the front opening of the freezer compartment 203, the switching compartment 201, etc. can be reliably prevented.

[0049] Furthermore, since the opening side arrangement portion 307 of the side heat dissipation pipe 303 takes over the role of preventing condensation, one of the left or right sides of the front heat dissipation pipe 305, which previously played a role in preventing condensation (the right side in this embodiment), can be eliminated as described above, thereby reducing the material cost of the front heat dissipation pipe 305.

[0050] Although the heat entering the interior of the refrigerator can be reduced by significantly reducing the number of heat dissipation pipes, the amount of heat dissipated from condensers such as heat dissipation pipes in the cooling system decreases, which may result in a deterioration of system efficiency. However, by improving the heat dissipation capacity of outer condenser 301 placed in the machine room, it is possible to reduce heat entering the refrigerator while maintaining system efficiency.

[0051] [1-3. Effects, etc.] As described above, in the present embodiment, front heat dissipation pipe 305 arranged at the front opening of the refrigerator is arranged on the same side wall on both the upstream and downstream sides of the refrigerant flow in the refrigeration cycle, so that the amount of heat entering the freezing temperature zone of freezer compartment 203 or the like from front heat dissipation pipe 305 arranged at the front opening can be efficiently reduced, and the cooling effect can be improved to achieve energy saving.

[0052] In addition, vacuum insulation material 115 is provided between outer box 111 and inner box 112 on the left side wall 114, and the vacuum insulation material 115 is arranged on the inside of the cabinet for at least a part of the front heat dissipation pipe 305 passing through the left side wall 114, so that heat entering from the front heat dissipation pipe 305 arranged in the side wall can also be reduced.

[0053] Furthermore, since the front heat dissipation pipe 305 at the front opening is disposed below the partition wall 210 below the refrigerator compartment 200, the amount of heat entering the refrigerator compartment from the front heat dissipation pipe 305 disposed on the partition wall 210 can also be reduced.

[0054] In addition, the side heat dissipation pipe 303 has an opening side arrangement portion 307 on the other side different from the side on which the front heat dissipation pipe 305 is arranged, and this opening side arrangement portion 307 is arranged forward of the side heat dissipation pipe 303 arranged on the left side wall 114 on which the front heat dissipation pipe 305 is arranged, so that the heat radiated from the upstream side heat dissipation pipe 303 is efficiently transferred to the front opening of the freezer compartment 203, effectively preventing condensation at the front opening.

[0055] Furthermore, the opening side installation portion 307 of the side heat dissipation pipe 303 is arranged forward of the front end portion of the vacuum insulation material 115 attached to the right side wall 113, and there is no contact between the heat dissipation pipe and the metal layer of the outer casing material of the vacuum insulation material 115. This makes it possible to prevent condensation while suppressing heat bridging into the interior of the freezer compartment 203, etc., and also reduces the intrusion of heat into the interior of the compartment due to heat bridging.

[0056] Also, since the opening side installation part 307 of the side heat dissipation pipe 303 is fixed to the flange part 116 of the outer box 111 like the left front heat dissipation pipe 305, it is possible to make the distance between the heat dissipation pipe and the inside of the refrigerator as far as possible, and it is possible to suppress the transfer of heat from the side heat dissipation pipe 303 to the inside of the refrigerator including the freezer compartment 203 as well as the refrigerator compartment 200, the switchable compartment 201, the vegetable compartment 204, etc. via the outer box 111, the inner box 112, and the foam insulation material. Moreover, since it can be reliably fixed to the outer box 111, it is possible to provide a refrigerator with reduced variation in installation.

[0057] Furthermore, since the front heat dissipation pipe 305 is arranged on the same left side of the left and right sides of the front opening of each chamber, the installation work in the process of assembling the front heat dissipation pipe 305 to the outer box 111 is easy to perform, and bending or damage to the front heat dissipation pipe 305 during the process of bending the outer box 111 can be reduced.

[0058] (Other embodiments) As described above, the first embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. In addition, it is also possible to combine the components described in the first embodiment to create new embodiments.

[0059] For example, in this embodiment, the front heat dissipation pipe 305 is arranged on the left side of the front opening, and the opening side arrangement portion 307 of the side heat dissipation pipe 303 is arranged on the right side, but they may be arranged on the opposite sides, and the same effect can be obtained.

[0060] In addition, in this embodiment, the opening side arrangement portion 307 of the side heat dissipation pipe 303 is provided at the front opening of the freezer compartment 203 and the vegetable compartment 204, but this may be the case only for the freezer compartment 203, and the side heat dissipation pipe 303 on the front opening side of the vegetable compartment 204 may be arranged at a position shifted rearward from the front opening, as in the refrigerator compartment 200.

[0061] Further, the machine room in the present embodiment is configured by being divided into first machine room 205 and second machine room 207, but an integrated machine room may be provided at the bottom of the refrigerator, and compressor 206, outer condenser 301, a defrosting tray, a defrosting fan, etc. may be accommodated in this machine room.

[0062] Further, the refrigeration cycle shown in FIG. 3 is not limited to this order, and the order in which the heat radiation pipes are arranged on the wall surface of the refrigerator may be different.

[0063] As described above, the technology disclosed herein can be modified, substituted, added, omitted, and the like in various ways within the scope of the claims or their equivalents. [Industrial Applicability]

[0064] INDUSTRIAL APPLICABILITY As described above, the refrigerator according to the present disclosure can effectively reduce heat entering through the front opening at a high level, and can be applied to freezing application products such as household and commercial refrigerators and coolers that require high energy efficiency. [Explanation of symbols]

[0065] 100 Refrigerator 111 Outer box 112 Inner box 113 Right side wall 114 Left side wall 115 Vacuum insulation material 116 Flange part 200 Refrigerator 203 Freezer 204 Vegetable Room 210 Partition Wall 303, 303a Side heat dissipation pipe 305 Front heat dissipation pipe 307 Opening side installation part

Claims

1. a refrigerator defined by an outer box, an inner box which forms a storage compartment, and a heat-sealed partition wall, with a refrigerator compartment at the top and a freezer compartment and a vegetable compartment at the bottom, and a front heat dissipation pipe disposed in a front opening of the freezer compartment, the front heat dissipation pipe is disposed via the same side wall on both the upstream and downstream sides of a refrigerant flow in a refrigeration cycle, the front heat dissipation pipe is disposed in a front opening other than the front opening opposite the same side wall through which the front heat dissipation pipe is disposed on both the upstream and downstream sides, and the refrigerator is provided with a side heat dissipation pipe disposed in the side wall, and the side heat dissipation pipe disposed in the side wall on the other side different from the side on which the front heat dissipation pipe is disposed is disposed forward of the side heat dissipation pipe disposed in the side wall on the side on which the front heat dissipation pipe is disposed.

2. The refrigerator, freezer, and vegetable compartments are arranged in this order from the top.

2. The refrigerator according to claim 1, wherein the front heat radiation pipe is disposed at a position at a predetermined height from the bottom surface of the vegetable compartment.

3. 3. The refrigerator according to claim 1, wherein the upstream side of the refrigerant flow in the refrigeration cycle of the front heat dissipation pipe is disposed closer to the front opening on the same side wall than the downstream side of the refrigerant flow in the refrigeration cycle of the front heat dissipation pipe.

4. 4. The refrigerator according to claim 3, wherein the downstream side of the front heat dissipation pipe extends horizontally from the front opening to the rear side and is led to a machine compartment through the same side wall.

5. The refrigerator according to any one of claims 1 to 4, characterized in that a vacuum insulation material is provided between the outer box and the inner box of the side wall, and the vacuum insulation material is arranged on the inside of the refrigerator with respect to at least a portion of the front heat dissipation pipe passing through the side wall.

6. 6. The refrigerator according to claim 1, wherein the front heat radiation pipe at the front opening is disposed below a partition wall below the refrigerator compartment.

7. A vacuum insulation material is provided between the outer box and the inner box of the side wall, The refrigerator according to any one of claims 1 to 6, characterized in that the side heat dissipation pipe arranged in the side wall of the other side other than the side on which the front heat dissipation pipe is arranged is arranged forward of the front end of the vacuum insulation material.

8. A refrigerator as described in any one of claims 1 to 7, characterized in that the outer box has a flange portion, and the side heat dissipation pipe is fixed to the flange portion.

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