CN113739490A

CN113739490A - Refrigerator with a door

Info

Publication number: CN113739490A
Application number: CN202110571702.5A
Authority: CN
Inventors: 和田悟; 阿部慎一; 中田惠美子; 河野卓也
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2020-05-28
Filing date: 2021-05-25
Publication date: 2021-12-03
Also published as: JP2021188806A

Abstract

The refrigerator includes a heat-insulating box body and a machine room disposed below the heat-insulating box body. A compressor is disposed in the machine room. In the machine room, a substrate unit is disposed beside the compressor. The control board is housed in an electrical box (housing member). The back surface of the electric box and the surface of the electric box opposite to the compressor are covered with a heat conductive plate (a good heat conductive member).

Description

Refrigerator with a door

Technical Field

An aspect of the present invention relates to a refrigerator having a machine room.

Background

In order to insulate heat from the surroundings, a refrigerator is provided with a heat insulation box so as to cover the outer periphery of a storage space. A machine chamber is provided below the rear surface side of the heat insulating box, and a compressor and the like constituting a refrigeration cycle are disposed in the machine chamber.

The refrigerator includes a control board for controlling an electronic component such as a compressor.

As shown in, for example, japanese patent application laid-open No. 10-148463, the control board can be disposed in the machine room. In the refrigerator disclosed in japanese unexamined patent publication No. 10-148463, an electric component housing box for housing a control board is supported by a reinforcing plate and is disposed in a machine room. Thus, the heat generated by the control substrate does not affect the interior of the refrigerator.

Disclosure of Invention

However, in the structure disclosed in japanese patent application laid-open No. 10-148463, although the heat generated in the control board can be prevented from affecting the inside of the refrigerator, it is difficult to release the heat generated in the control board, and there is a possibility that the heat accumulates in the electric component storage box or the machine room.

Accordingly, an object of the present invention is to provide a refrigerator capable of easily dissipating heat generated in a control board in a machine room.

An aspect of the present invention relates to a refrigerator including: a heat insulation box body; a machine room provided below the heat insulating box body; a compressor disposed in the machine chamber; a control substrate disposed beside the compressor; and a housing member that houses the control substrate. The back surface of the housing member and the surface of the housing member facing the compressor are covered with a member having good thermal conductivity.

According to an aspect of the present invention, a refrigerator capable of easily dissipating heat generated by a control board in a machine chamber can be provided.

Drawings

Fig. 1 is a plan view illustrating a configuration of a back surface portion of a refrigerator according to a first embodiment of the present invention.

Fig. 2 is a schematic sectional view showing an internal configuration of the refrigerator shown in fig. 1.

Fig. 3 is a plan view showing a state where the heat conduction plate of the base plate unit is removed in the refrigerator shown in fig. 1.

Fig. 4 is a perspective view showing a state where the heat conduction plate of the base plate unit is removed from the refrigerator shown in fig. 1.

Fig. 5 is a sectional view showing an internal configuration of a machine chamber of the refrigerator shown in fig. 1.

Fig. 6 is a plan view schematically showing an arrangement region of the substrate unit in the machine room of the refrigerator shown in fig. 1.

Fig. 7 is a perspective view showing an electrical box of a base plate unit mounted on a refrigerator according to a first embodiment.

Fig. 8 is a plan view schematically showing an arrangement region of a substrate unit in a machine chamber of a refrigerator according to a modification of the first embodiment.

Fig. 9 is a plan view illustrating a configuration of a back surface portion of a refrigerator according to a second embodiment of the present invention.

Fig. 10 is a perspective view showing a state in which the heat conduction plate of the base plate unit is removed in the refrigerator shown in fig. 9.

Fig. 11 is a sectional view showing an internal configuration of a machine chamber of the refrigerator shown in fig. 9.

Fig. 12 is a perspective view showing an electrical box of a base plate unit mounted on a refrigerator according to a second embodiment.

Fig. 13 is a plan view schematically showing an arrangement region of a substrate unit in a machine room of a refrigerator according to a third embodiment.

Fig. 14 is a plan view schematically showing an arrangement region of a substrate unit in a machine room of a refrigerator according to a fourth embodiment.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same members are given the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

< first embodiment >

(integral constitution of refrigerator)

First, the overall configuration of the refrigerator 1 according to the first embodiment is explained. Fig. 1 shows the configuration of the back side of the refrigerator 1. Fig. 2 shows an internal structure of the refrigerator 1. In fig. 2, the components in the machine chamber 30 other than the compressor 31 are not shown.

As shown in fig. 2, refrigerator 1 includes first refrigerating room 11 in an upper stage, freezing room 12 in a middle stage, second refrigerating room 13 in a lower stage, and the like. A refrigerating chamber door 11a is provided in the first refrigerating chamber 11. A freezing chamber door 12a is provided in the freezing chamber 12. A refrigerating chamber door 13a is provided in the second refrigerating chamber 13.

As described above, the refrigerator 1 according to the present embodiment is divided into the upper stage part, the middle stage part, and the lower stage part, and each storage space is provided. A partition 59 is provided between the storage spaces. However, the arrangement position of each storage space is not limited to this.

In the present embodiment, the surface provided with the door is referred to as a front surface or a front surface of the refrigerator. The respective surfaces of the refrigerator 1 are an upper surface, a side surface, a rear surface, and a bottom surface based on positions where the refrigerator 1 is installed in a normal state with the front surface as a reference.

A refrigeration cycle 40 is provided inside the refrigerator 1. The refrigeration cycle 40 is configured by connecting a compressor 31, a condenser (not shown), an expander (not shown), and a cooler (evaporator) 32 via refrigerant pipes (refrigerant flow passages) through which a refrigerant flows.

As shown in fig. 2, the compressor 31 is disposed in the machine chamber 30 provided on the rear surface side of the bottom of the refrigerator 1. The cooler 32 is disposed in a cooling chamber 35 provided on the rear surface side of the refrigerator 1. The cooling chamber 35 is provided with a cooling fan 33 and the like in addition to the cooler 32. The cooling fan 33 is provided to circulate air between the cooling chamber 35 and each storage space.

In addition, a control unit is provided inside the refrigerator 1. The control unit is disposed on a control board 21 described later, for example. The control unit controls the operation of the refrigeration cycle 40. That is, the control unit starts the operation of the refrigeration cycle by driving the compressor 31, and the refrigerant flows through the cycle.

Specifically, the high-temperature and high-pressure refrigerant compressed by the compressor 31 is condensed while being radiated by the condenser. The high-pressure refrigerant is expanded by the expander to have a low temperature and a low pressure, and is sent to the cooler 32 as an evaporator. The refrigerant flowing into the cooler 32 exchanges heat with the cold air flowing through the cooling chamber 35, absorbs heat and evaporates, and is a low-temperature gas refrigerant, which is sent to the compressor 31. In this way, the refrigerant cycle operates the refrigeration cycle, and cool air is generated by the airflow that exchanges heat with the cooler 32.

(construction of Heat insulation Box)

In the refrigerator 1, a heat insulating box 50 is provided as a heat insulating structure for insulating each storage space from the surroundings. The heat insulating box 50 is provided so as to cover the outer periphery of the refrigerator 1. As shown in fig. 2, the heat-insulating box 50 mainly includes an outer box 61, an inner box 62, a vacuum heat-insulating material 51, and a foamed heat-insulating material 56.

The outer box 61 forms the outer peripheral surface of the heat insulating box 50. The outer box 61 is mainly composed of an upper surface portion 50a, a side surface portion 50b, a back surface portion 50c, and a bottom surface portion 50 d. The inner case 62 forms the inner peripheral surface of the heat insulating case 50. Further, the inner box 62 forms inner walls of storage spaces (e.g., the first refrigerating chamber 11, the freezing chamber 12, the second refrigerating chamber 13) and a rear wall of the cooling chamber 35.

A space for disposing the machine chamber 30 is formed on the rear surface side below the heat insulating box 50. That is, the machine chamber 30 is disposed outside the heat insulation box 50. This is because the temperature in the machine room 30 rises due to the operation of the compressor 31.

The vacuum insulation material 51 and the foamed insulation material 56 are provided in the space between the outer box 61 and the inner box 62. The vacuum heat insulating material 51 is a sheet-like or plate-like heat insulating material. The vacuum heat insulating material 51 is disposed on, for example, a side surface, an upper surface, a bottom surface, a back surface, and the like of the refrigerator 1. The foamed heat insulating material 56 may be formed of, for example, foamed polyurethane (also referred to as rigid polyurethane foam).

(construction of machine room interior)

Next, a more detailed structure of the machine chamber 30 provided below the rear surface side of the heat-insulating box 50 will be described with reference to fig. 1 and the like. Fig. 1 shows a back portion of a refrigerator 1. Fig. 3 and 4 show a state in which the heat conduction plate 25 is removed from the substrate unit 20 in the machine chamber 30 in the refrigerator 1 shown in fig. 1. Fig. 5 is a cross-sectional view of the refrigerator 1 showing the configuration in the machine chamber 30. Fig. 5 is a sectional view of the structure of the portion a-a shown in fig. 1.

The rear surface portion 50c of the heat insulating box 50 is mainly constituted by the back plate of the outer box 61. The machine chamber 30 is located below the back surface portion 50 c. The machine chamber 30 is mainly partitioned by a bottom plate 63 forming a bottom surface portion 50d of the heat insulating box 50. As shown in fig. 2 and the like, the rear portion of the bottom plate 63 rises upward. The rearmost side of the bottom plate 63 has a substantially flat shape in the horizontal direction, and this portion forms a ceiling 63a of the machine chamber 30.

The bottom plate 63 has a top 63a and an upright portion 63c as regions for partitioning the machine chamber 30 (see fig. 2). The top 63a forms an upper surface (top) of the machine chamber 30. The rising portion 63c forms the front surface of the machine chamber 30. The side surface of the machine chamber 30 is formed by the side surface portion 50b of the outer box 61.

The compressor 31, the substrate unit 20, the evaporation pan 70, and the like are mainly disposed in the machine chamber 30. The compressor 31 is disposed slightly to the right (left when viewed from the front) in the machine chamber 30 when viewed from the rear. The substrate unit 20 is disposed beside the compressor 31. In the example shown in fig. 1, the substrate unit 20 is disposed on the left side of the compressor 31 (the right side of the compressor 31 when viewed from the front). However, in another example, the substrate unit 20 may be disposed on the right side of the compressor 31 (the left side of the compressor 31 when viewed from the front).

A control board 21 is disposed in the board unit 20. In the present embodiment, the control board 21 is disposed in a state of being inclined with respect to the left-right direction of the machine chamber 30 (see fig. 5). Specifically, the control board 21 is disposed along the inclined front surface portion 22c of the electrical box 22 as an exterior member of the board unit 20 (see fig. 6 and the like).

In the machine chamber 30, a space 30p is formed on the front side of the region where the substrate unit 20 is disposed. The space 30p is defined by a side surface of the machine chamber 30 (for example, the side surface portion 50b of the heat insulation box 50), a front surface of the machine chamber 30 (for example, the rising portion 63c of the bottom plate 63), an upper surface of the machine chamber 30 (for example, the ceiling portion 63a), a bottom surface of the machine chamber 30, and the inclined front surface portion 22c of the electrical box 22, and is a substantially closed space. In other words, the space 30p is isolated from the space on the side where the compressor 31 is disposed in the machine chamber 30.

A wire harness including various kinds of wiring is arranged in the space 30 p. The wire harness is connected to various electric components in the heat insulating box 50, various electric components in the machine room 30 such as the compressor 31, the control board 21, the power supply unit (not shown), and the like.

In the present embodiment, the space 30p is partitioned by the inclined front surface portion 22 c. Therefore, as shown in fig. 5, the space 30p gradually becomes narrower in width from the side surface of the machine chamber 30 (for example, the side surface portion 50b of the heat-insulating box 50) toward the center. By disposing the substrate unit 20 in the machine chamber 30 with the space 30p provided, a distance between the side surface of the refrigerator 1 and the substrate unit 20 can be secured. This makes it difficult for water to enter the electrical box 22 of the board unit 20 along the side surface of the refrigerator 1, and prevents water from adhering to the control board 21 even if the through-hole 22d for the wire harness is formed above the electrical box 22.

The evaporation pan 70 is disposed above the compressor 31. The condensed water (also referred to as drain) generated in the cooling chamber 35 is discharged to the evaporation pan 70. The condensed water generated in the cooling chamber 35 contains, for example, defrosting water generated when defrosting the cooler 32. By disposing the evaporation pan 70 above the compressor 31, the drain water stored in the evaporation pan 70 can be efficiently heated by the heat of the compressor 31, and the drain water can be evaporated in a shorter time.

(constitution of substrate Unit)

Next, the detailed structure of the substrate unit 20 will be described. Fig. 6 schematically shows the arrangement region of the substrate unit 20 in the robot chamber 30. Fig. 6 schematically shows the structure of the control board 21 disposed in the board unit 20. Fig. 7 shows the structure of the electrical box 22 as an exterior member of the substrate unit 20.

The board unit 20 has a control board 21, an electrical box (housing member) 22, and a heat conduction plate (good heat conductive member) 25 as main components.

The control board 21 includes various electronic components such as an electronic circuit and a coil. The control board 21 has a substantially flat plate shape. The control board 21 is disposed in an electrical box 22 formed of a resin material. Specifically, the control board 21 is disposed substantially parallel to the inclined front surface portion 22c of the electrical box 22 in the vicinity of the inclined front surface portion 22 c. Thus, the control board 21 is disposed in a state of being inclined with respect to the front-rear direction of the machine chamber 30. The control board 21 may be disposed in a state inclined with respect to the left-right direction of the machine chamber 30.

By disposing the control board 21 in an inclined state in this way, the area of the control board 21 can be increased. That is, the limited space in the machine room 30 can be effectively utilized.

The electronic components mounted on the control board 21 include a heat-generating component 23 having a higher heat-generating property and a non-heat-generating component 24 having a lower heat-generating property than the heat-generating component 23. Examples of the heat generating component 23 include a driving element such as an IPM (intelligent power module), a coil, and a reactor. Examples of the non-heat generating component 24 include an IC such as a control microcomputer, and a capacitor.

The electrical box 22 accommodates the control board 21 in the internal space 22S. In the present embodiment, as shown in fig. 7, the electrical box 22 has a prismatic outer shape of a right triangle. The outer shape of the electrical box 22 is mainly formed by an upper surface portion 22a, a bottom surface portion 22b, and an inclined front surface portion 22 c. In a state where the electrical box 22 is disposed in the machine chamber 30, the inclined front surface portion 22c is inclined with respect to the front-rear direction and the left-right direction of the machine chamber 30. The control board 21 is disposed along the inclined front surface portion 22 c.

A hole 22d for passing a wiring connected to the control board 21 is formed in an upper corner portion of the inclined front surface portion 22 c. The hole 22d for passing such wiring is preferably provided in an upper portion (a portion located above the center position in the vertical direction) of the inclined front surface portion 22 c.

A plurality of wires in the wire harness drawn out from the vicinity of the ceiling 63a of the machine chamber 30 into the machine chamber 30 are branched in the space 30p, and a part of the wires are arranged from the hole 22d into the electrical box 22 and connected to the control board 21. By providing the hole 22d in the upper portion of the inclined front surface portion 22c, the length of the wiring connected to the control board 21 can be shortened.

The rear surface portion and the side surface portion of the electrical box 22 (the surface facing the compressor 31) are opened. In a state where the control board 21 is disposed in the internal space 22S of the electrical box 22, the rear surface portion and the side surface portion of the electrical box 22 are covered with the heat conduction plate 25.

The electrical box 22 is formed of a material having low thermal conductivity (i.e., high thermal insulation) compared to metal. The electrical box 22 is made of a material having high electrical insulation. Examples of the material of the electrical box 22 include resin materials such as polypropylene, polyethylene, and silicone. The electrical box 22 is formed of a material having low thermal conductivity, and thus the electrical box 22 functions as a heat insulating member.

The heat transfer plate 25 is made of a material having higher heat conductivity (a material having good heat conductivity), such as metal. In the present embodiment, the heat transfer plate 25 can be formed by bending a substantially rectangular metal plate at substantially right angles. The heat transfer plate 25 is mainly constituted by a back surface portion 25a and a side surface portion 25 b.

The rear surface portion 25a covers the rear surface side of the internal space 22S of the electrical box 22. In a state where the substrate unit 20 is disposed in the machine chamber 30, the rear surface portion 25a of the heat conduction plate 25 is positioned on the rear surface side of the refrigerator 1 (see fig. 5).

The side surface portion 25b covers a side surface side of the internal space 22S of the electrical box 22 (a surface facing the compressor 31). In a state where the substrate unit 20 is disposed in the machine chamber 30, the side surface portion 25b of the heat conduction plate 25 is disposed at a position adjacent to the compressor 31 and the evaporation pan 70. That is, the side surface portion 25b is disposed between the compressor 31 and the control board 21.

Since the back surface side and the side surface side of the internal space 22S of the electrical box 22 are covered with the heat conductive plate 25 having good heat conductivity, the area of the heat conductive plate 25 facing the heat generating component 23 on the control board 21 is increased, and therefore, the heat generated by the control board 21 can be efficiently released to the outside of the internal space 22S.

The electrical box 22 on which the control board 21 is disposed is separated from the compressor 31 by the side surface 25b of the heat conduction plate 25. As described above, the side surface portion 25b having good thermal conductivity separates the control board 21 and the compressor 31, both of which have heat generating properties, and thus the side surface portion 25b serves as a heat radiating plate, and heat radiation of the control board 21 can be improved. The heat conduction plate 25 has a back surface portion 25a continuous with the side surface portion 25b, and promotes heat transfer between the side surface portion 25b and the back surface portion 25 a. Therefore, the heat of the compressor 31 transmitted to the side surface portion 25b close to the compressor 31 can be efficiently transmitted to the rear surface portion 25 a. The heat transferred to the back surface portion 25a is discharged to the outside of the refrigerator 1.

(arrangement of electronic parts on control substrate)

Next, a method for disposing various electronic components on the control board 21 will be described with reference to fig. 6. The electronic components mounted on the control board 21 include a plurality of heat generating components 23 and a plurality of non-heat generating components 24.

A mounting surface of the electronic component on the control board 21 is shown in a frame of an alternate long and short dash line in fig. 6. In fig. 6, in a state where the rectangular control board 21 is attached to the electrical box 22 in a plan view, the horizontal direction is X, and the vertical direction is Y. As shown in fig. 6, the heat generating components 23 having higher heat generation properties are arranged near the center portion (inside the dashed line) in the X direction on the control board 21. On the other hand, the non-heat generating components 24 having relatively low heat generation properties are arranged in the vicinity of both ends in the X direction on the control board 21.

By disposing the electronic components on the control board 21 in this manner, the heat generating component 23 is disposed at a position farther from the surface of the control board 21 to the heat conductive plate 25. For example, in the example shown in the left diagram of fig. 6, if the distance from the surface of the control substrate 21 in the region where the heat-generating component 23 is arranged to the heat conductive plate 25 is set to L1, and the distance from the surface of the control substrate 21 in the region where the non-heat-generating component 24 is arranged to the heat conductive plate 25 is set to L2, L1> L2.

By arranging the electronic components (i.e., the heat generating component 23 and the non-heat generating component 24) on the control board 21 in the above-described manner, the heat generating component 23 can be arranged at a position further away from the heat conducting plate 25. This can enlarge the space near the heat generating component 23, and can suppress heat from accumulating near the heat generating component 23. Further, by making the distance between the non-heat-generating component 24 and the heat transfer plate 25 close, the space near the non-heat-generating component 24 is cooled by the heat transfer plate 25. This can suppress a temperature rise of the non-heat generating component 24.

(summary of the first embodiment)

As described above, the refrigerator 1 according to the present embodiment includes the heat-insulated box 50 and the machine chamber 30 disposed below the heat-insulated box 50. A compressor 31 is disposed in the machine chamber 30. An evaporation pan 70 is provided above the compressor 31. In the machine chamber 30, the substrate unit 20 is disposed beside the compressor 31 and the evaporation pan 70. The substrate unit 20 has a control substrate 21, an electrical box 22, and the like. The control board 21 is housed in an electrical box (housing member) 22. The rear surface of the electrical box 22 and the surface of the electrical box 22 facing the compressor 31 are covered with a heat conductive plate (a good heat conductive member) 25.

In this way, the back surface of the electrical box 22 and the surface of the electrical box 22 facing the compressor 31 are covered with the heat conductive plate 25 having good heat conductivity, and thus the heat generated in the control board 21 can be efficiently released to the outside of the internal space 22S.

The side surface 25b of the heat conductive plate 25 separates the electrical box 22, on which the control board 21 is disposed, from the compressor 31. As described above, the side surface portion 25b having good thermal conductivity separates the control board 21 and the compressor 31, both of which have heat generating properties, and thus the side surface portion 25b serves as a heat radiating plate, and heat radiation of the control board 21 can be improved. The heat conduction plate 25 has a back surface portion 25a continuous with the side surface portion 25b, and promotes heat transfer between the side surface portion 25b and the back surface portion 25 a. Therefore, the heat of the compressor 31 transmitted to the side surface portion 25b close to the compressor 31 can be efficiently transmitted to the rear surface portion 25 a.

As described above, according to the refrigerator 1 of the present embodiment, the heat generated by the control board 21 and the compressor 31 can be easily dissipated to the rear surface side of the refrigerator 1, and the temperature rise in the machine chamber 30 can be suppressed. Therefore, the temperature of the machine chamber 30 increases, and the possibility of a failure occurring in a component (for example, the control board 21 or the like) disposed in the machine chamber 30 can be reduced.

The control board 21 in the electric box 22 is disposed in a state inclined with respect to the front-rear direction (or the left-right direction) of the machine chamber 30. This makes it possible to effectively utilize the limited space in the machine chamber 30 when the control board 21 is disposed in the machine chamber 30. Therefore, the control board 21 having a larger area can be disposed in the machine chamber 30.

(modification example)

Fig. 8 shows a configuration of a modification example according to the first embodiment. Fig. 8 shows a configuration around the substrate unit 20A in the machine chamber 30 in the refrigerator 1 according to a modification. As in the first embodiment, a control board 21 is disposed in the board unit 20A. The control board 21 is disposed along the inclined front surface portion 22c of the electrical box 22 as an exterior member of the board unit 20.

Various electronic components such as an electronic circuit and a coil are mounted on the control board 21. The electronic components mounted on the control board 21 include a heat-generating component 23 having a higher heat-generating property and a non-heat-generating component 24 (not shown in fig. 8) having a lower heat-generating property than the heat-generating component 23. The board unit 20A has a second heat generating component 23A on the outside of the electrical box 22. Examples of the second heat generating component 23A include a reactor and the like. The second heat generating component 23A is disposed on the inclined front surface portion 22c of the electrical box 22. Thus, the second heat generating component 23A having a large amount of heat generation can be disposed in the space 30p, and the generation of heat in the internal space 22S can be suppressed.

< second embodiment >

Next, a second embodiment of the present invention will be described. In the second embodiment, the configuration of the substrate unit is different from that of the first embodiment. The same configuration as that of the first embodiment can be applied to the other configurations. Hereinafter, the second embodiment will be described mainly focusing on differences from the first embodiment.

Fig. 9 is a diagram showing the configuration of the back side of the refrigerator 1 according to the second embodiment. In the refrigerator 1, a heat insulating box 50 is provided as a heat insulating structure for insulating each storage space from the surroundings. The same configuration as that of the first embodiment can be applied to the heat insulation box 50.

A machine chamber 30 is provided below the heat insulating box 50 on the rear side. The compressor 31, the substrate unit 120, the evaporation pan 70, and the like are mainly disposed in the machine chamber 30. The compressor 31 and the evaporating dish 70 may be configured in the same manner as in the first embodiment.

Fig. 10 shows a state in which the heat conduction plate 125 is removed from the substrate unit 120 in the machine chamber 30 in the refrigerator shown in fig. 9. Fig. 11 is a cross-sectional view of the refrigerator 1 showing the configuration in the machine chamber 30. FIG. 11 is a sectional view showing the structure of the B-B line shown in FIG. 9.

The control board 21 is disposed in the board unit 120. In the present embodiment, the control board 21 is disposed in a state of being inclined with respect to the left-right direction of the machine chamber 30 (see fig. 10, 11, and the like). Specifically, the control board 21 is disposed along the inclined front surface portion 122c of the electrical box 122 as an exterior member of the board unit 120 (see fig. 11 and the like).

In the machine chamber 30, a space 30p is formed on the front side of the region where the substrate unit 120 is disposed. The space 30p is defined by a side surface of the machine chamber 30 (for example, a side surface portion 50b of the heat insulation box 50), a front surface of the machine chamber 30 (for example, an upright portion 63c of the bottom plate 63), an upper surface of the machine chamber 30 (for example, a ceiling portion 63a), a bottom surface of the machine chamber 30, and an inclined front surface portion 122c of the electrical box 122, and is a substantially closed space.

The board unit 120 has, as main components, a control board 21, an electrical box (housing member) 122, and a heat conduction plate (good heat conductive member) 125.

The control board 21 is disposed substantially parallel to the inclined front surface portion 122c of the electrical box 122 in the vicinity of the inclined front surface portion 122c, as in the first embodiment. Thus, the control board 21 is disposed in a state of being inclined with respect to the front-rear direction of the machine chamber 30. The control board 21 may be disposed in a state inclined with respect to the left-right direction of the machine chamber 30.

As in the first embodiment, the electronic components mounted on the control board 21 include a heat-generating component 23 having a higher heat-generating property and a non-heat-generating component 24 having a lower heat-generating property than the heat-generating component 23. The method described in the first embodiment can be applied to the method of arranging the heat-generating components 23 and the non-heat-generating components 24 on the control board 21.

Fig. 12 shows a configuration of an electrical box 122 as an exterior member of the substrate unit 120. The electrical box 122 accommodates the control board 21 in an internal space 122S thereof. In the present embodiment, the electrical box 122 has a substantially parallelogram shape in a plan view (see fig. 11). The electrical box 122 is formed mainly by an upper surface portion 122a, a bottom surface portion 122b, an inclined front surface portion 122c, and a front surface portion 122 d. In a state where the electrical box 122 is disposed in the machine chamber 30, the inclined front surface portion 122c is inclined with respect to the front-rear direction and the left-right direction of the machine chamber 30. The control board 21 is disposed along the inclined front surface portion 122 c. Front portion 122d is located at the foremost side in machine room 30 and is arranged substantially parallel to the rear portion of machine room 30.

A hole 122e for passing a wiring connected to the control substrate 21 is formed at a corner portion of the inclined front surface portion 122c on the side closer to the upper front surface portion 122 d. It is preferable that the hole 122e for passing such wiring is provided in an upper portion (a portion located above the center position in the vertical direction) of the inclined front surface portion 122 c. By providing the hole 122e in the upper portion of the inclined front surface portion 122c, the length of the wiring connected to the control board 21 can be shortened.

The rear surface portion and the side surface portion of the electrical box 122 (the surface facing the compressor 31) are opened. In a state where the control board 21 is disposed in the internal space 122S of the electrical box 122, the rear surface portion and the side surface portion of the electrical box 122 are covered with the heat conduction plate 125.

As in the first embodiment, the electrical box 122 is formed of a material having low thermal conductivity (i.e., high thermal insulation) compared to metal. The electrical box 122 is formed of a material having high electrical insulation.

The heat transfer plate 125 is made of a material having higher heat conductivity (a material having good heat conductivity), such as metal. In the present embodiment, the heat conduction plate 125 can be formed by bending a substantially rectangular metal plate at an obtuse angle. The heat transfer plate 125 is mainly constituted by a back surface portion 125a and a side surface portion 125 b.

The rear surface portion 125a covers the rear surface side of the internal space 122S of the electrical box 122. In a state where the substrate unit 120 is disposed in the machine chamber 30, the rear surface portion 125a of the heat conduction plate 125 is positioned on the rear surface side of the refrigerator 1 (see fig. 11).

The side surface portion 125b covers a side surface side of the internal space 122S of the electric box 122 (a surface facing the compressor 31). The side surface portion 125b is disposed between the compressor 31 and the control board 21. In the present embodiment, the side surface portion 125b is inclined with respect to the front-rear direction and the left-right direction of the machine room 30. The side surface 125b is substantially parallel to the control board 21.

The rear surface side and the side surface side of the internal space 122S of the electrical box 122 are covered with the heat conductive plate 125 having good heat conductivity, and thus the heat generated in the control board 21 can be efficiently released to the outside of the internal space 122S.

In the present embodiment, the side surface portion 125b is inclined with respect to the front-rear direction and the left-right direction of the machine chamber 30, and therefore, can be separated from the compressor 31 particularly at the rear portion. Therefore, the heat generated from the compressor 31 can be dissipated not only in the side surface portion 125b, but also diffused to the outside of the refrigerator 1. In the present embodiment, the internal space 122S of the electrical box 122 is smaller than that of the first embodiment. Therefore, although the heat generation of the heat generating component 23 in the control board 21 is not large, it is preferably applied to a refrigerator (for example, a large-sized refrigerator having a high-efficiency inverter control circuit) in which the heat generation of the compressor 31 is large.

< third embodiment >

Next, a third embodiment of the present invention will be described. In the third embodiment, the configuration of the substrate unit is different from that of the first embodiment. The same configuration as that of the first embodiment can be applied to other configurations. Therefore, the third embodiment will be described mainly focusing on differences from the first embodiment.

Fig. 13 is a diagram showing the configuration of the periphery of the substrate unit 220 in the machine chamber 30 in the refrigerator 1 according to the third embodiment. As in the first embodiment, the control board 21 is disposed in the board unit 220. Various electronic components such as an electronic circuit and a coil are mounted on the control board 21. The electronic components mounted on the control board 21 include a heat-generating component 23 having a higher heat-generating property and a non-heat-generating component 24 (not shown in fig. 13) having a lower heat-generating property than the heat-generating component 23.

An electrical box 222 as an exterior member of the board unit 220 accommodates the control board 21 in an internal space 222S thereof. In the present embodiment, the electrical box 222 has a substantially rectangular parallelepiped outer shape. The electrical box 222 has a substantially rectangular shape in plan view, and is disposed so that the longitudinal direction of the rectangle is along the side surface of the refrigerator 1. The control board 21 is disposed along the surface of the electrical box 222 formed on the side surface portion 50b of the heat-insulating box 50. Electronic components such as the heat generating component 23 are disposed on the side of the control board 21 facing the compressor 31.

The rear surface portion and the side surface portion (the surface facing the compressor 31) of the electrical box 222 are opened. In a state where the control board 21 is disposed in the internal space 222S of the electrical box 222, the rear surface portion and the side surface portion of the electrical box 222 are covered with the heat conduction plate 225.

The heat transfer plate 225 is made of a material having higher heat conductivity (a material having good heat conductivity), such as metal. In the present embodiment, the heat conduction plate 225 can be formed by bending a substantially rectangular metal plate at substantially right angles. The heat transfer plate 225 is mainly constituted by a back surface portion 225a and a side surface portion 225 b.

The rear surface portion 225a covers the rear surface side of the internal space 222S of the electrical box 222. In a state where substrate unit 220 is disposed in machine chamber 30, rear surface portion 225a of heat conduction plate 225 is located on the rear surface side of refrigerator 1.

The side surface portion 225b covers a side surface side (a surface facing the compressor 31) of the internal space 222S of the electric box 222. The side surface portion 225b is disposed between the compressor 31 and the control board 21.

The rear surface side and the side surface side of the internal space 222S of the electrical box 222 are covered with the heat conductive plate 225 having good heat conductivity, and thus the heat generated in the control board 21 can be efficiently released to the outside of the internal space 222S.

The configuration of the present embodiment is useful when the area of the control board 21 is small. That is, the configuration of the present embodiment is preferably applied to a small-sized refrigerator or the like in which the capacity of the machine chamber 30 is small and the current flowing through the compressor is small.

< fourth embodiment >

Next, a fourth embodiment of the present invention will be explained. In the fourth embodiment, the configuration of the substrate unit is different from that of the first embodiment. The same configuration as that of the first embodiment can be applied to other configurations. Hereinafter, the fourth embodiment will be described mainly focusing on differences from the first embodiment.

Fig. 14 is a diagram showing the configuration of the periphery of the substrate unit 320 in the machine chamber 30 in the refrigerator 1 according to the fourth embodiment. As in the first embodiment, the control board 21 is disposed in the board unit 320. Electronic components such as a heat generating component 23 are mounted on the control board 21.

An electrical box 322 as an exterior member of the board unit 320 accommodates the control board 21 in an internal space 322S thereof. In the present embodiment, the electrical box 322 has a substantially rectangular parallelepiped outer shape. The electrical box 322 has a substantially rectangular shape in plan view, and is disposed so that the longitudinal direction of the rectangle is along the rear surface of the refrigerator 1. Control board 21 is disposed along a surface of electrical box 322 formed along rear surface portion 50c of heat insulation box 50. Electronic components such as the heat generating component 23 are disposed on the rear surface of the control board 21.

The rear surface portion and the side surface portion (the surface facing the compressor 31) of the electrical box 322 are opened. In a state where the control board 21 is disposed in the internal space 322S of the electrical box 322, the rear surface portion and the side surface portion of the electrical box 322 are covered with the heat conduction plate 325.

The heat transfer plate 325 is made of a material having higher heat conductivity (a material having good heat conductivity), such as metal. In the present embodiment, the heat transfer plate 325 can be formed by bending a substantially rectangular metal plate at substantially right angles. The heat transfer plate 325 is mainly constituted by a back surface portion 325a and a side surface portion 325 b.

Rear surface portion 325a covers the rear surface side of internal space 322S of electrical box 322. In a state where substrate unit 320 is disposed in machine chamber 30, rear surface 325a of heat conduction plate 325 is located on the rear surface side of refrigerator 1.

The side surface 325b covers the side surface of the internal space 322S of the electric box 322 (the surface facing the compressor 31). The side surface 325b is disposed between the compressor 31 and the control board 21.

The rear surface side and the side surface side of the internal space 322S of the electrical box 322 are covered with the heat conductive plate 325 having good heat conductivity, and thus the heat generated in the control board 21 can be efficiently released to the outside of the internal space 322S.

The configuration of the present embodiment is useful when the amount of heat generation of the heat generating components 23 and the like on the control board 21 is large.

(conclusion)

A refrigerator (for example, refrigerator 1) related to an aspect of the present invention includes: an insulated box (e.g., insulated box 50); a machine chamber (for example, a machine chamber 30) provided below the heat insulating box; a compressor (e.g., compressor 31) disposed in the machine room; a control board (for example, a control board 21) disposed beside the compressor; and a housing member (e.g., an

electrical box

22, 122, 222, 322) that houses the control substrate. The back surface of the housing member and the surface of the housing member facing the compressor are covered with a good heat conductive member (for example, heat

conductive plates

25, 125, 225, 325).

In the refrigerator (for example, refrigerator 1) according to the aspect of the present invention, the control board (for example, control board 21) may be disposed in a state of being inclined with respect to the front-rear direction of the machine chamber (for example, machine chamber 30).

In the refrigerator (for example, the refrigerator 1) according to the aspect of the present invention, at least one heat generating component (for example, the heat generating component 23) may be provided on the control board (for example, the control board 21), and the heat generating component may be disposed at a position farther from the surface of the control board to the member having good thermal conductivity (for example, the thermal conductive plates 25 and 125).

In the refrigerator (for example, refrigerator 1) according to the aspect of the present invention, a space (for example, space 30p) may be formed in the machine chamber (for example, machine chamber 30) on the front side of the storage member.

In the refrigerator (for example, the refrigerator 1) according to the aspect of the present invention, through holes (for example, the

holes

22d and 122e) of the wiring connected to the control board (for example, the control board 21) may be provided on the front side of the storage member (for example, the electrical boxes 22 and 122) and above the center position of the storage member in the vertical direction.

In the refrigerator (for example, the refrigerator 1) according to the aspect of the present invention, a heat generating component (for example, the second heat generating component 23A) connected to the control board (for example, the control board 21) may be disposed in a space on the front side of the storage component (for example, the electrical boxes 22 and 122).

It should be understood that the embodiments disclosed herein are illustrative in all respects, and not restrictive. The scope of the present invention is defined by the terms of the claims, is not defined by the description above, and includes all modifications equivalent in meaning and scope to the terms of the claims. In addition, configurations obtained by combining the configurations of the different embodiments described in the present specification are also included in the scope of the present invention.

Claims

1. A refrigerator, characterized by comprising:

a heat insulation box body;

a machine room provided below the heat insulating box body;

a compressor disposed in the machine chamber;

a control substrate disposed beside the compressor; and

a housing member that houses the control board,

the back surface of the housing member and the surface of the housing member facing the compressor are covered with a member having good thermal conductivity.

2. The refrigerator of claim 1,

the control board is disposed in a state of being inclined with respect to a front-rear direction of the machine chamber.

3. The refrigerator of claim 2,

at least one heating component is arranged on the control substrate,

the heat generating component is disposed at a position farther from the surface of the control board to the member having good thermal conductivity.

4. The refrigerator according to any one of claims 1 to 3,

the machine chamber has a space formed in front of the housing member.

5. The refrigerator of claim 4,

a through hole for wiring connected to the control board is provided in front of the housing member and above a central position of the housing member in the vertical direction.

6. The refrigerator according to claim 4 or 5,

a heat generating component connected to the control board is disposed in a space in front of the housing member.