JP2020076542A - refrigerator - Google Patents

Abstract

To provide a refrigerator where a large capacity refrigerator may be cooled by a small amount of refrigerant, and thus it is possible to improve maintenance of a refrigerant circuit and to prevent condensation on an outer wall of a housing.SOLUTION: A refrigerator 100 includes a housing 10, and a cooling cycle 20 to cool an inner space of the housing 10. The housing 10 includes a main body 11, and a detachable part 12 that houses components of the cooling cycle 20 and is detachably attached to the main body 11. The main body 11 and the detachable part 12 have respective opposed surfaces X1 opposed to each other. At least one of the main body 11 and the detachable part 12 is provided with a heat transfer member to guide heat toward the outside of the refrigerator with respect the opposed surfaces X1.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a refrigerator.

  As a conventional refrigerator, as shown in Patent Document 1, a refrigerant circuit such as a compressor or an evaporator is arranged in an integrated manner so that a large-capacity refrigerator can be cooled with a small amount of refrigerant. It has been known.

  In such a configuration, if a part of the housing is made detachable and the refrigerant circuit is integrated in the removable portion, the refrigerant circuit can be attached and detached all at once, so that the maintainability can be improved.

  However, even though the heat insulating material is enclosed inside the housing, if a part of the housing is made removable as described above, the heat insulating material cannot be provided at the boundary portion, and the cool air inside the refrigerator cannot be provided. Is transmitted to the outside of the refrigerator through the boundary portion, and dew condensation occurs on the outer wall of the housing.

  As a means for preventing this dew condensation, it is conceivable to provide a heater inside the housing, but in this case, not only the heater cost is required, but also the installation location of the heater is structurally and manufacturingly restricted. Becomes

JP-A-8-247618

  Therefore, the present invention has an object to cool a large-capacity refrigerator with a small amount of refrigerant, improve the maintainability of the refrigerant circuit, and prevent condensation on the outer wall of the housing. is there.

  That is, a refrigerator according to the present invention is a refrigerator that includes a housing and a refrigeration cycle that cools an internal space of the housing, the housing including a main body and components of the refrigeration cycle. At least one of the main body and the detachable part has a detachable part that is housed and detachable with respect to the main body, and each of the main body and the detachable part has a facing surface facing each other. Further, a heat transfer member for guiding heat to the outside of the facing surface is provided.

In the refrigerator configured in this way, since the components of the refrigeration cycle are housed in the detachable parts, it is possible to cool a large-capacity refrigerator with a small amount of refrigerant, and improve the maintainability of the refrigerant circuit. You can
In addition, since at least one of the main body and the detachable parts is provided with the heat transfer member that guides heat to the outside of the facing surface, it is possible to suppress the occurrence of dew condensation on the outer wall of the housing.

It is preferable that each of the main body and the removable part has an outer wall and an inner wall, and the heat transfer member is provided between the outer wall and the inner wall of at least one of the main body and the removable part. ..
In this case, since the heat transfer member is arranged inside at least one of the main body and the detachable part, the appearance is not impaired.

It is preferable that the heat transfer member is provided over an inner surface of the outer wall of at least one of the main body and the detachable part and a back surface of the facing surface.
By thus providing the heat transfer member not only on the inner surface of the outer wall but also on the back surface of the facing surface, the heat transfer member can also have a function as a reinforcing member.

It is preferable that the heat transfer member is provided along the width direction of the removable part.
With such a configuration, it is possible to suppress the occurrence of dew condensation in the width direction of the main body.

  In order to suppress the production cost while suppressing the generation of dew condensation by the heat transfer member, the portion provided in the inner surface of the outer wall of the heat transfer member and extending in the predetermined direction has a length of 1 mm along the extending direction. It is preferably 200 mm or less.

The longer the portion of the heat transfer member provided on the back surface of the facing surface is, the more the function as a structural reinforcing member can be exerted. On the other hand, if the portion is too long, the cold air inside the cold storage will face the facing surface. Condensation is likely to occur because it is easily transmitted to the outside.
That is, there is a trade-off relationship between the improvement in mechanical strength and the suppression of dew condensation, and in view of this, the portion provided on the back surface of the facing surface of the heat transfer member is the outer wall on the back surface from the outer wall. It is preferably half or less of the length to the inner wall.
With such a configuration, it is possible to improve mechanical strength while suppressing dew condensation by the heat transfer member.

  Specific examples of the heat transfer member include a metal foil tape, a metal piece, and a carbon graphite sheet.

  In order to suppress the production cost while suppressing the generation of dew condensation by the heat transfer member, it is preferable that the thickness of the heat transfer member is 10 μm or more and 3 mm or less.

  As a specific embodiment of the heat conductive member, it is preferable that the heat conductivity of the heat transfer member is equal to or higher than the heat conductivity of a member forming the housing or a member forming the refrigeration cycle.

  More specifically, it is preferable that the heat conductivity of the heat transfer member is 100 times or more the heat conductivity of the heat insulating material sealed inside the housing.

It is preferable that a fastening member that fastens the main body and the detachable part to each other is provided inside the facing surface.
With such a configuration, the fastening member cannot be seen from the outside of the refrigerator and the appearance is not spoiled, and dew condensation on the fastening member can be prevented.

  According to the present invention having such a configuration, it is possible to cool a large-capacity refrigerator with a small amount of refrigerant, and further improve the maintainability of the refrigerant circuit, while making it difficult for dew condensation to occur on the surface of the housing. You can

The schematic diagram which shows the external appearance of the refrigerator in this embodiment. The schematic diagram which shows the internal structure of the refrigerator in this embodiment. The schematic diagram which shows the state which the attachment / detachment parts of the same embodiment were removed from the main body. The schematic diagram which shows the internal structure of the attachment / detachment parts of the same embodiment. The schematic diagram which shows the heat transfer member of the same embodiment. The test result which compared this invention and the conventional structure. The schematic diagram which shows the heat transfer member in other embodiment. The schematic diagram which shows the fastening member in other embodiment. The schematic diagram which shows the fastening member in other embodiment.

  An embodiment of the refrigerator according to the present invention will be described below.

  As shown in FIGS. 1 and 2, the refrigerator 100 of the present embodiment includes a housing 10 having a refrigerating room S1 and a freezing room S2, and a refrigerating cycle 20 for cooling these rooms. It should be noted that it is not always necessary to have both the refrigerating room S1 and the freezing room S2, and it is also possible to have only one of these.

  As shown in FIG. 1, the housing 10 has a pair of side plates 10a, a bottom plate 10b, a top plate 10c, and a rear plate 10d, and a pair of opening doors D are provided in the opening formed in the front surface. It is a thing. As shown in FIG. 2, the side plate 10a, the bottom plate 10b, the top plate 10c, and the rear plate 10d are composed of an outer wall 10x, an inner wall 10y, and a heat insulating material Z such as urethane enclosed between them.

  As shown in FIGS. 2 and 3, the housing 10 of the present embodiment includes a main body 11 and a detachable part 12 that is detachably attached to the main body 11. Then, by putting the components of the refrigeration cycle 20 in the detachable parts 12, the refrigeration cycle 20 can be detached from the main body 11 together with the detachable parts 12.

  The main body 11 is provided with a refrigerating room S1 and a freezing room S2 whose set temperatures are different from each other, and is further provided with a duct P through which cooling air for cooling the refrigerating room S1 and the freezing room S2 flows.

  Here, the duct P is provided on the rear side of the refrigerating room S1 and the freezing room S2, and a cold air supply port Pa for supplying cooling air is formed at a location corresponding to each room of the duct P.

  The removable part 12 is removable from the main body 11 to the rear side, for example, and accommodates the refrigeration cycle 20 that generates the cooling air described above.

  As shown in FIG. 2, the attachment / detachment part 12 guides the cooling air cooled by the refrigeration cycle 20 to the duct P described above and introduces the cooling air that has passed through the refrigerating chamber S1 and the freezing chamber S2. , Forms part of the circulation path of the cooling air.

  Specifically, as shown in FIG. 4, the detachable parts 12 are formed with cold air outlets Q corresponding to the refrigerating compartment S1 and the freezing compartment S2, respectively.

  As shown in FIGS. 2 and 3, the attachment / detachment part 12 is formed by separating a part of the housing 10 from the main body 11. Here, a part of the lower rear part of the housing 10 is cut out. Is. With such a configuration, the attachment / detachment part 12 and the main body 11 are formed with facing surfaces X1 facing each other. As shown in FIG. 4, these facing surfaces X1 are here inclined surfaces that are inclined downward toward the front, and are joined via a seal member SL made of, for example, rubber or the like.

  More specifically, the detachable part 12 is provided with a storage space S3 inside the storage and a storage space S4 outside the storage here. At least the evaporator 21 which comprises the refrigeration cycle 20 is accommodated in the accommodation space S3 inside the refrigerator, and here, the refrigerator 21 evaporator 21a and the freezer evaporator 21b are accommodated. On the other hand, at least the compressor 22 and the condenser 23 that configure the refrigeration cycle 20 are housed in the housing space S4 outside the refrigerator. A blower fan 24 is further accommodated in the accommodation space S4 outside the cabinet, and a control box 25 is attached to the outer surface of the detachable part 12.

  In the refrigerator 100 of the present embodiment, as shown in FIG. 5, at least one of the main body 11 and the detachable parts 12 is provided with a heat transfer member 30 that guides heat to the outside of the pair of facing surfaces X1. ..

  Here, as shown in FIG. 5, for example, in the outer wall 10x of the rear plate 10d constituting the housing 10, the lower the temperature is, the closer to the outer side edge A of the facing surface X1. The higher the distance, that is, the higher the distance from the outer edge A of the refrigerator along the height direction of the housing 10, the higher the temperature becomes. That is, the outer side edge portion A of the facing surface X1 is a dew condensation fragile portion where dew condensation is likely to occur on the outer wall 10x.

  Therefore, in the present embodiment, the heat transfer member 30 is provided on the outer wall 10x of at least one of the main body 11 and the detachable part 12 along the direction away from the outer edge A of the facing surface X1. The heat on the high temperature side is transmitted to the outside edge A of the facing surface X1.

  More specifically, as shown in FIG. 5, the heat transfer member 30 is provided on the outer wall 10x of the rear plate 10d of the housing 10 along the height direction of the housing 10. Further, the heat transfer member 30 here is provided over the entire width direction of the removable part 12 along the width direction of the removable part 12 (direction in which the side plates 10a of the housing 10 face each other).

  The heat transfer member 30 is provided inside the main body 11, that is, between the main body 11, the outer wall 10x, and the inner wall 10y, and faces the first element 31 provided along the inner surface X2 of the outer wall 10x. The second element 32 is provided along the back surface X3 of the surface X1. That is, this heat transfer member is provided by bending from the inner surface X2 of the outer wall 10x to the back surface X3 of the facing surface X1. With this configuration, since the second element 32 functions as a reinforcing member, the heat transfer member 30 of this embodiment is also used as a reinforcing member.

The first element 31 is provided on the inner surface of the outer wall 10x and extends in a predetermined direction, and has a length L1 in the extending direction (the height direction of the housing 10 in this embodiment, that is, a high temperature on the outer wall 10x). Considering that the heat on the side is transferred to the outer side edge portion A of the facing surface X1, it is advantageous that the length dimension L1 is large, but this causes an increase in manufacturing cost.
Therefore, in the present embodiment, the dimension L1 of the first element 31 is set to 1 mm or more and 200 mm or less along the height direction of the housing 10 in order to suppress the manufacturing cost while ensuring the heat transfer property of the heat transfer member 30. ..

In view of the function as a reinforcing member, it is advantageous for the second element 32 to have a large length dimension L2, but then, the cool air in the refrigerator propagates through the second element 32 and the outer edge A of the facing surface X1. May be cooled.
Therefore, in the present embodiment, the dimension L2 of the second element 32 is set from the outer wall 10x on the back surface X3 of the facing surface X1 in order to exert the function as the reinforcing member without cooling the outer edge portion A of the facing surface X1. It is less than half the length to the inner wall 10y.

  In addition, the heat transfer member 30 of the present embodiment has a thickness of 10 μm or more and 3 mm or less in order to suppress the manufacturing cost while ensuring the heat transfer property.

  The thermal conductivity of the heat transfer member 30 is equal to or higher than the thermal conductivity of iron, stainless steel (for example, ABS: acrylonitrile butadiene stainless steel, etc.) forming the casing 10 and the refrigeration cycle 20, and is enclosed inside the casing 10. It is preferable that the thermal conductivity of the heat insulating material Z such as polyurethane is 100 times or more.

  Examples of such a heat transfer member 30 include those made of a good thermal conductor such as a metal foil tape, a metal piece, or a carbon graphite sheet. Here, a sheet member such as iron or aluminum is used.

  In the refrigerator 100 configured as described above, the refrigeration cycle 20 is housed in the removable part 12, so that the refrigerator 100 having a large capacity can be cooled with a small amount of refrigerant, and the maintainability of the refrigerant circuit is improved. be able to.

Moreover, since the heat transfer member 30 that guides heat to the outer side edge portion A of the facing surface X1 is provided on the outer wall 10x of the main body 11, it is possible to suppress the occurrence of dew condensation on the outer wall 10x of the housing 10. Becomes
The test result showing this is shown in FIG. In this test, the temperature of the outer side edge portion A of the facing surface X1 is measured, and the temperature difference between the surrounding portion B (specifically, two places) is measured, and these measured temperatures are measured by the conventional configuration and the present application. It is a comparison with the invention. As the heat transfer member 30, an aluminum tape having a thickness of 50 μm was used. The dew point temperature under this test condition is 23.2 ° C., and if it is lower than this, dew condensation occurs.

From the test results, in the conventional configuration, the temperature of the outer side edge portion A of the facing surface X1 was 22.3 ° C. and the difference from the surrounding portion B was 1.6 ° C. at the maximum, whereas the present invention of the present application. In the above configuration, the temperature of the outside edge portion A of the facing surface X1 was 23.4 ° C., and the difference from the surrounding portion B was 0.6 ° C. at maximum.
From this, according to the configuration of the present embodiment, it is possible to reduce the temperature difference from the surrounding portion B, increase the temperature of the outside edge portion A of the facing surface X1, and suppress the occurrence of dew condensation. I see what I can do.

  Further, since the heat transfer member 30 is arranged inside the main body 11, the appearance is not impaired.

  Furthermore, since the heat transfer member 30 is provided not only on the inner surface X2 of the outer wall 10x of the main body 11 but also on the back surface X3 of the facing surface X1, the heat transfer member 30 can also have a function as a reinforcing member. it can.

  Moreover, since the heat transfer member 30 is provided along the width direction of the detachable part 12, it is possible to suppress the occurrence of dew condensation over a wide range in the width direction.

  The present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the heat transfer member 30 is provided on the main body 11, but it may be provided on the detachable part 12 as shown in FIG. 7A, or as shown in FIG. 7B. It may be provided on both the main body 11 and the detachable part 12. Although not shown, the heat transfer member 30 may be provided on the outer surface of the outer wall 10x.

As an aspect of attaching the detachable part 12 to the main body 11, as shown in FIG. 8, an aspect of fastening with a fastening member 40 such as a screw can be mentioned.
More specifically, the fastening member 40 is provided on the inside of the facing surface X1 and penetrates through the pair of facing surfaces X1.
With such a configuration, the fastening member 40 cannot be seen from the outside of the refrigerator and the appearance is not spoiled, and the occurrence of dew condensation on the fastening member 40 can be suppressed.

Further, as shown in FIG. 9, in the outer wall 10x of the bottom plate 10b forming the housing 10, the temperature is lower as it is closer to the outer side edge A of the facing surface X1 and is farther from the outer side edge A of the facing surface X1. That is, the higher the temperature is, the further away from the outside edge portion A along the depth direction of the housing 10.
Therefore, as shown in FIG. 9, as with the rear plate 10d, at least one of the main body 11 and the detachable part 12 of the bottom plate 10b may be provided with the heat transfer member 30 along at least the depth direction of the housing 10. good.

  Although the detachable part 12 of the above-described embodiment is formed by obliquely cutting the lower portion on the rear surface side of the casing 10, the notch is not limited to this, and for example, the lower portion on the rear surface side of the casing 10 may be stepped or stepped. It may be cut out in a curved shape. That is, the facing surface X1 formed between the detachable part 12 and the main body 11 is not limited to an inclined surface that inclines downward toward the front, but may be a stepped surface or a curved surface.

  Furthermore, the notch of the detachable part may be changed as appropriate, such as the upper rear surface side or the lower side surface side.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

100 ... Refrigerator 10 ... Housing 11 ... Main body 12 ... Attachment / detachment part X1 ... Opposing surface 20 ... Refrigeration cycle 30 ... Heat transfer member 31 ... First element 32 ... Second element A ... Outside edge of storage

Claims (11)

A refrigerator comprising a housing and a refrigeration cycle for cooling the interior space of the housing,
The housing is
The main body,
While accommodating the components of the refrigeration cycle, it is provided with a detachable part that is detachable from the main body,
Each of the main body and the removable part has a facing surface facing each other,
At least one of the main body and the detachable part is provided with a heat transfer member for guiding heat to the outside of the opposed surface of the refrigerator. Each of the main body and the detachable part has an outer wall and an inner wall,
The refrigerator according to claim 1, wherein the heat transfer member is provided between the outer wall and the inner wall of at least one of the main body and the removable part.   The refrigerator according to claim 2, wherein the heat transfer member is provided over an inner surface of the outer wall of at least one of the main body and the detachable part and a back surface of the facing surface.   The refrigerator according to claim 1, wherein the heat transfer member is provided along a width direction of the removable part.   The refrigerator according to claim 3, wherein a portion provided on the inner surface of the outer wall of the heat transfer member and extending in a predetermined direction is 1 mm or more and 200 mm or less along the extending direction.   6. The refrigerator according to claim 3, wherein a portion of the heat transfer member provided on the back surface of the facing surface is half or less of a length of the back surface from the outer wall to the inner wall.   The refrigerator according to any one of claims 1 to 6, wherein the heat transfer member is a metal foil tape, a metal piece, or a carbon graphite sheet.   The refrigerator according to claim 1, wherein the heat transfer member has a thickness of 10 μm or more and 3 mm or less.   9. The heat conductivity of the heat transfer member is equal to or higher than the heat conductivity of a member forming the housing or a member forming the refrigeration cycle. Refrigerator.   10. The heat conductivity of the heat transfer member is 100 times or more the heat conductivity of a heat insulating material sealed inside the housing, as claimed in any one of claims 1 to 9. refrigerator.   The refrigerator according to any one of claims 1 to 10, wherein a fastening member that fastens the main body and the detachable part is provided inside the facing surface of the refrigerator.