Refrigerator

Abstract

To provide a refrigerator that can control heat emitted from electrical components having high heat generating property from being less likely to propagate to other electrical components.SOLUTION: A refrigerator 1 includes: a heat insulation box body 50; and a machine room 30 installed downward the heat insulation box body 50. The machine room 30 has a bottom surface that is formed of a bottom plate 61. A compressor 30 is disposed on the bottom plate 61. A power supply unit 20 is disposed in the machine room 30. The power supply unit 20 includes: a main electrical component; and a high heat generating electrical component having a heat generating property that is higher than that of the main electrical component. The high heat generating electrical component is disposed on the bottom plate 61.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a refrigerator having a machine compartment. [Background technology]

[0002] In order to insulate the refrigerator from the surroundings, a heat-insulating box is provided to cover the outer periphery of the storage space. A machine room in which a compressor and other components of the refrigeration cycle are disposed is provided below the rear side of the heat-insulating box.

[0003] The refrigerator also includes a power supply unit for controlling components such as a compressor. The power supply unit includes a wiring board and various electrical components. Since these electrical components generate heat, the power supply unit including the electrical components is often disposed in a machine room located outside the heat-insulating box. For example, Patent Document 1 discloses a refrigerator in which a power system board 91 is disposed in a machine room 39. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-76305 Summary of the Invention [Problem to be solved by the invention]

[0005] Among various electrical components mounted on a wiring board, there are some that generate more heat than other electrical components, such as a reactor for EMC measures. In the refrigerator disclosed in Patent Document 1, a reactor 93 is disposed in a case body 81 that houses a power system board 91. However, in such a configuration, heat generated in the reactor is difficult to be released to the outside, and the heat may be trapped in the case body.

[0006] Therefore, an object of the present invention is to provide a refrigerator that can prevent heat generated from a highly heat-generating electrical component (high heat-generating electrical component) from being transferred to other electrical components. [Means for solving the problem]

[0007] A refrigerator according to one aspect of the present invention includes an insulating box, a machine room provided below the insulating box, a bottom plate forming a bottom surface of the machine room, a compressor arranged on the bottom plate, and a power supply unit arranged in the machine room. The power supply unit has a main electrical component and a high heat generating electrical component that generates more heat than the main electrical component, and the high heat generating electrical component is arranged on the bottom plate. Effect of the Invention

[0008] According to the refrigerator according to one aspect of the present invention, heat generated from a highly heat-generating electrical component arranged in the machinery compartment can be made less likely to be transmitted to other electrical components in the machinery compartment. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view showing the configuration of the rear side of a refrigerator according to one embodiment. [Diagram 2] FIG. 2 is a perspective view showing a configuration inside a machine compartment of the refrigerator shown in FIG. [Diagram 3] 3 is a perspective view showing the internal configuration of a main housing and a sub-housing shown in FIG. 2. [Figure 4] FIG. 2 is a schematic diagram showing a circuit configuration in a power supply unit provided in the refrigerator shown in FIG. [Diagram 5] 3 is a perspective view showing an internal configuration of a sub-accommodation body provided in the machine chamber shown in FIG. 2. [Figure 6] 3 is a perspective view showing an internal configuration of a sub-accommodation body provided in the machine chamber shown in FIG. 2. [Figure 7] 3 is a perspective view showing an internal configuration of a sub-accommodation body provided in the machine chamber shown in FIG. 2. [Figure 8]3 is a perspective view showing a bottom plate forming the bottom surface of the machine chamber shown in FIG. 2. [Figure 9] 13 is a schematic diagram showing the configuration of the exit portion of the wiring from the sub-housing; FIG. [Figure 10] FIG. 13 is a schematic diagram showing a configuration of a sub-container according to a first modified example. [Figure 11] FIG. 13 is a schematic diagram showing a configuration of a sub-container according to a second modified example. [Figure 12] FIG. 13 is a schematic diagram showing a configuration of a sub-container according to a third modified example. [Figure 13] FIG. 13 is a schematic diagram showing a configuration of a sub-container according to a fourth modified example. [Figure 14] FIG. 11 is a perspective view showing an internal configuration of a sub-container provided in a refrigerator according to a second embodiment. [Figure 15] 15 is a perspective view showing a portion of the bottom plate on which the sub-container shown in FIG. 14 is disposed. [Figure 16] 15 is a cross-sectional view showing the cross-sectional configuration of the sub-container shown in FIG. 14 in the left-right direction. [Figure 17] FIG. 13 is a diagram illustrating a modified example of the second embodiment. [Figure 18] FIG. 11 is a perspective view showing an internal configuration of a sub-container provided in a refrigerator according to a third embodiment. [Figure 19] 19 is a perspective view showing a portion of the bottom plate on which the sub-container shown in FIG. 18 is disposed. [Figure 20] 19 is a schematic cross-sectional view showing a configuration for attaching a reactor to a bottom plate in the sub-container shown in FIG. 18. [Figure 21] FIG. 11 is a perspective view showing the inside of a sub-container provided in a refrigerator according to a fourth embodiment. [Figure 22] 22 is a perspective view showing a portion of the bottom plate on which the sub-container shown in FIG. 21 is disposed. [Diagram 23] 22 is a cross-sectional view showing the cross-sectional configuration of the sub-container shown in FIG. 21 in the front-rear direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[0011] <First embodiment> (Overall configuration of refrigerator) First, the overall configuration of refrigerator 1 according to the first embodiment will be described. Fig. 1 shows the configuration of the rear side of refrigerator 1. In this embodiment, the surface on which a door (not shown) is provided is called the front or front surface of the refrigerator. Then, based on the front surface as a reference, the respective surfaces of refrigerator 1 are defined as the top surface, side surface, rear surface, and bottom surface, based on the positions where refrigerator 1 would exist if installed in a normal state.

[0012] The refrigerator 1 is provided with an insulated box 50 as an insulating structure for insulating each storage space from the surroundings. The outer peripheral surface of the insulated box 50 is mainly composed of a top surface portion 50a, a side surface portion 50b, a back surface portion 50c, and a bottom surface portion 50d. A machine room 30 is provided on the lower back side of the insulated box 50. The machine room 30 is located outside the insulated box 50. Heat-generating members such as a compressor 31 are arranged in the machine room 30.

[0013] (Machine room configuration) Next, a more detailed configuration of the machine room 30 provided below the rear side of the heat-insulating box 50 will be described.

[0014] The wall surface of the machine room 30 is mainly formed by a partition plate 63, a bottom plate 61, and a side wall. The partition plate 63 forms the bottom surface portion 50d of the heat-insulating box body 50. The partition plate 63 has a ceiling portion and a rising portion 63b as areas for dividing the machine room 30. The ceiling portion forms the upper surface (ceiling) of the machine room 30. The rising portion 63b forms the front surface of the machine room 30. The side surface of the machine room 30 is formed by the side surface portion 50b of the heat-insulating box body 50. The bottom surface of the machine room 30 is formed by the bottom plate 61. The bottom plate 61 is formed of a heat-transferring and conductive material such as metal.

[0015] In the machine room 30, mainly, a compressor 31, a power supply unit 20, an evaporation dish (not shown), and the like are arranged. The compressor 31 is arranged slightly to the right side in the machine room 30 when viewed from the rear (left side when viewed from the front). Although not shown in FIG. 1, the evaporation dish is arranged above the compressor 31.

[0016] The power supply unit 20 is disposed beside the compressor 31. In the example shown in Fig. 1, the power supply unit 20 is disposed to the left of the compressor 31 (to the right of the compressor 31 when viewed from the front).

[0017] The compressor 31 and the power supply unit 20 may be arranged in a left-right reversed manner compared to the example shown in FIG.

[0018] The power supply unit 20 includes a power supply section and a control section for controlling various electric components in the refrigerator 1, such as the compressor 31. The power supply unit 20 includes a main housing 25 and a sub-housing 40.

[0019] Fig. 2 shows the internal configuration of the machine room 30. Fig. 2 shows the state of the machine room 30 provided in the refrigerator 1 as viewed from the rear side. Fig. 3 shows the internal configuration of the main storage body 25 and the sub storage body 40.

[0020] As described above, the compressor 31 is disposed slightly to the right in the machine chamber 30 when viewed from the rear. The main housing 25 of the power supply unit 20 is disposed near the end on the left side in the machine chamber 30 when viewed from the rear (the right side when viewed from the front). The sub-housing 40 of the power supply unit 20 is disposed between the compressor 31 and the main housing 25. The sub-housing 40 is disposed on the bottom plate 61.

[0021] The main housing 25 has a housing case 26, and the main wiring board 21 and various electrical components housed in the housing case 26. The housing case 26 forms an exterior part of the main housing 25. The housing case 26 mainly has a first case member 26a and a second case member 26b.

[0022] 3 shows a state in which the second case member 26b of the housing case 26 has been removed. The housing case 26 houses the main wiring board 21 and various electrical components. Examples of electrical components include, but are not limited to, ICs (specifically, the AC / DC converter circuit 22), capacitors, driving elements, and coils. The various electrical components may be mounted on the main wiring board 21, or may be disposed at any position within the main housing 25. The various electrical components housed in the main housing 25 (for example, the main wiring board 21, the AC / DC converter circuit 22, etc.) are referred to as main electrical components.

[0023] The sub-container 40 includes a reactor 41, a metal cover 42, and a resin part 43. The metal cover 42 is made of a conductive metal material. The resin part 43 is made of a non-conductive resin material. The metal cover 42 is a conductive case that covers the reactor 41. The resin part 43 is disposed on a bottom plate 61, and the reactor 41 is placed thereon. That is, the resin part 43 serves as a base for holding the reactor 41.

[0024] At least one reactor 41 is disposed inside the metal cover 42 of the sub-housing 40. The reactor 41 has a higher heat generation property compared to other electrical components disposed inside the main housing 25. Therefore, the reactor 41 can also be called a high heat generation electrical component. Note that, examples of high heat generation electrical components other than the reactor 41 include elements that drive the compressor 31, such as an intelligent power module.

[0025] 4 shows a schematic diagram of a circuit configuration within the power supply unit 20. The power supply unit 20 is connected to a power plug 81 via a harness (wiring) 82. Power is supplied to the power supply unit 20 via the power plug 81. The reactor 41 is connected to the main wiring board 21 via a harness (wiring) 84.

[0026] 4, the harness 82 connects the power plug 81 and the main wiring board 21 via a connector 83. In addition, the harness 84 connects the reactor 41 and the main wiring board 21 via a connector 85.

[0027] 4, the reactor 41 is disposed between the power plug 81 and the AC / DC converter circuit 22 disposed on the main wiring board 21. By providing such a reactor 41, it is possible to prevent noise generated within the main wiring board 21 from passing through the power plug 81 and entering the indoor power system.

[0028] (Configuration of sub-container) Next, a more detailed configuration of the sub-accommodation body 40 included in the power supply unit 20 will be described.

[0029] Figures 5 to 7 show the internal configuration of the sub-housing 40 in the machine room 30. Figure 5 shows a state in which the reactor 41 included in the sub-housing 40 has been removed, and the main housing 25 is not shown. Figure 6 shows a state in which the compressor 31 has been removed from the state shown in Figure 5. Figure 7 shows a state in which the resin part 43 has been removed from the state shown in Figure 6. Figure 8 shows the configuration of the bottom plate 61 alone.

[0030] The upper surface of the bottom plate 61 forms the bottom surface of the machine room 30. As shown in Fig. 8, the upper surface of the bottom plate 61 is not a flat surface but has an uneven surface having partially raised portions. For example, the upper surface of the bottom plate 61 includes a lowermost surface 61a and a hill-shaped portion 61b formed by raising the lowermost surface 61a by one step. Note that the hill-shaped portion 61b may include a portion formed by raising the lowermost surface 61a by multiple steps.

[0031] The compressor 31 and the sub-housing 40 are fixed and disposed on the hill-shaped portion 61b. In this embodiment, the sub-housing 40 is disposed so as to bridge the front hill-shaped portion 61b and the rear hill-shaped portion 61b. The bottom surface 61a is located between the front hill-shaped portion 61b and the rear hill-shaped portion 61b below the sub-housing 40. This partially forms a space below the sub-housing 40. Note that, as long as the above-mentioned space is formed, the bottom surface does not have to be between the hill-shaped portions 61b. In addition, when the above-mentioned space is formed in the resin part 43 described later, the bottom plate 61 does not have to have an uneven surface.

[0032] An engagement portion 66 that engages with the sub-container 40 is provided at the position of the hill-shaped portion 61b where the sub-container 40 is arranged. The engagement portion 66 is formed by making a cut in a part of the bottom plate 61 and bending the cut portion. In this embodiment, two engagement portions 66 are provided on the front side of the bottom plate 61.

[0033] The front side of the sub-housing body 40 is attached to the bottom plate 61 via an engagement portion 66. The rear side of the sub-housing body 40 is fixed to a rear vertical wall 61c of the bottom plate 61. In this embodiment, the resin part 43 of the sub-housing body 40 is fixed to the bottom plate 61 (see FIG. 6).

[0034] The resin part 43 can be made of, for example, an electrically insulating material such as plastic or a rubber-based material.

[0035] In this embodiment, the resin part 43 is formed by molding hard plastic into a predetermined shape. The resin part 43 has a reactor mounting portion 71, screw fastening portions 72 for fastening the reactor, screw fastening portions 73 for fastening the metal cover 42, a rear protrusion 74, and front protrusions 75 (see FIG. 7).

[0036] The reactor 41 is placed on a reactor mounting portion 71 in the resin part 43 (see FIG. 3). With the reactor 41 placed on the reactor mounting portion 71, a core (iron core) of a coil (not shown) included in the reactor 41 extends in the front-rear direction. Screw fastening portions 72 are located at both ends of the reactor mounting portion 71 in the front-rear direction.

[0037] Ribs 41a extending in the front-rear direction are provided on both sides of the core of the reactor 41. The ribs 41a cover and protect the core, and are part of an outer frame that fixes the main body of the reactor 41. Holes for inserting screws 46 for fixing the reactor are formed near each end of the rib 41a in the front-rear direction (see FIG. 5). With the main body of the reactor 41 placed between the two screw fastening portions 72, each hole of the rib 41a is placed on the screw fastening portion 72. In this state, the screws 46 are inserted into the screw fastening portions 72, whereby the reactor 41 is fixed onto the resin part 43.

[0038] The reactor mounting portion 71 has lattice-shaped ribs formed thereon. That is, the reactor 41 is mounted on the lattice-shaped ribs. As a result, a space is partially formed below the reactor 41. With this configuration, it is possible to reduce the possibility that vibration transmitted from the compressor 31 to the bottom plate 61 during operation of the compressor 31 is transmitted to the reactor 41.

[0039] In addition, the core of the reactor 41 and the bottom plate 61 can be separated by a predetermined distance. This makes it possible to suppress the AC magnetic flux generated in the core from being transmitted to the bottom plate 61 due to mutual induction. Therefore, it is possible to suppress the generation of eddy currents in the bottom plate 61, and to reduce losses in the reactor 41. In order to enhance the effect of reducing the mutual induction effect, a magnetic material such as ferrite may be placed in the space below the reactor 41.

[0040] Two front protrusions 75 are provided on the front end portion of the resin part 43. Each front protrusion 75 has a shape that protrudes forward, and is inserted into each engagement portion 66 of the bottom plate 61, respectively.

[0041] The rear overhang 74 is provided at the rear end of the resin part 43. With the front projection 75 engaged with the engagement portion 66 of the bottom plate 61, the rear end face of the rear overhang 74 is in close proximity to the rear vertical wall 61c of the bottom plate 61. In this state, the screw 45a for fixing the resin part is inserted from the rear vertical wall 61c, and the resin part 43 is fixed to the bottom plate 61 (see FIG. 3).

[0042] With the rear end side of the resin part 43 fixed to the bottom plate 61 by the screw 45a, the front protrusion 75 of the resin part 43 is inserted into the engagement part 66 formed by bending the cut-out part of the bottom plate 61. In other words, the front protrusion 75 of the resin part 43 is not firmly fixed to the engagement part 66 of the bottom plate 61, but has a certain degree of "play".

[0043] This configuration makes it possible to prevent stress fluctuations generated from bottom plate 61 due to the operation of compressor 31 or shocks during transportation or installation of refrigerator 1 from being directly transmitted to resin part 43. In other words, the engagement portion between front protrusion 75 of resin part 43 and engagement part 66 of bottom plate 61 serves as a stress absorbing mechanism that absorbs stress fluctuations generated from bottom plate 61.

[0044] The metal cover 42 is placed on the resin part 43 so as to cover the reactor 41 placed on the resin part 43. In this state, the screw 45b is inserted into the screw fastening portion 73 of the resin part 43 from the opening formed in the metal cover 42. As a result, the metal cover 42 is fixed to the resin part 43.

[0045] 9 shows the configuration around the wiring (harness 84) connected to the reactor 41. The harness 84 extending from the reactor 41 to the main wiring board 21 is pulled out to the outside of the sub-housing 40 from an opening 42H formed in a side surface of the metal cover 42. A sealer 86 is wrapped around the outer periphery of the harness 84 located in this opening 42H. Providing such a sealer 86 on the harness 84 makes it possible to prevent liquids such as water from entering the inside of the sub-housing 40 through the opening 42H.

[0046] (Modification) Next, a modification of the sub-container 40 according to the first embodiment will be described.

[0047] Fig. 10 shows the configuration of the sub-container 40 according to the first modification. In the sub-container 40 shown in Fig. 10, the reactor 41 is placed on the resin part 43 in a state upside down compared to the first embodiment. That is, in Fig. 10, the rib 41a is located on the lower surface side of the reactor 41. In the first modification, the screw fastening portion for fixing the reactor is provided on the same surface as the reactor mounting portion 71.

[0048] 10, the metal cover 42 is provided with a rear overhang 42a. The rear overhang 42a of the metal cover 42 is provided so as to cover the rear overhang 74 of the resin part 43. The rear end surface of the rear overhang 42a of the metal cover 42 is in close proximity to the rear vertical wall 61c of the bottom plate 61. In this state, the screw 45a for fixing the resin part is inserted from the rear vertical wall 61c, and the metal cover 42 and the resin part 43 are fixed to the bottom plate 61.

[0049] As described above, a part of the conductive metal cover 42 (i.e., the rear overhanging portion 42a) comes into contact with the rear vertical wall 61c of the bottom plate 61, which is also conductive, so that the metal cover 42 is at ground potential. This puts the metal cover 42 in an earthed state, so that it is possible to block electromagnetic waves generated from the reactor 41 disposed inside the metal cover 42. This makes it possible to suppress the influence of electromagnetic waves on the main wiring board 21 and electrical components inside the main housing 25. This configuration can also be applied to the sub-housing 40 of the first embodiment.

[0050] FIG. 11 shows the configuration of the sub-container 40 according to the second modified example. In the second modified example, a flat resin plate is used as the resin part 43. This makes it easier to mold the resin part 43. The reactor 41 is fixed onto the upper surface of the resin part 43 by a screw 46A. The resin part 43 is fixed to the bottom plate 61 by a screw 46B. In one example, as shown in FIG. 11, the screw 46B is inserted from the lower surface of the bottom plate 61.

[0051] FIG. 12 shows a configuration of the sub-container 40 according to the third modified example. As in the second modified example, in the third modified example, a flat resin plate is used as the resin part 43. In addition, in the third modified example, the resin part 43 is disposed on the hill-shaped part 61b. The hill-shaped part 61b is raised one step above the lowermost surface 61a of the bottom plate 61, and a space S exists below the hill-shaped part 61b. Therefore, when the reactor 41 and the resin part 43 are fixed to the bottom plate 61, even if the screw 46C is driven from above and the tip of the screw penetrates the bottom plate 61, the tip of the screw can be kept within the space S. Therefore, when the refrigerator 1 is installed on the floor surface, the tip of the screw can be prevented from hitting the floor surface.

[0052] FIG. 13 shows the configuration of the sub-container 40 according to the fourth modified example. In the fourth modified example, an elastic member 143 such as rubber is used as a part for arranging the reactor 41 instead of the resin part 43. As shown in FIG. 13, the elastic member 143 is arranged on the bottom plate 61, and the reactor 41 is arranged on the elastic member 143. The reactor 41 and the resin part 43 are fixed to the bottom plate 61 by a screw 46D. In the example shown in FIG. 13, the screw 46D is inserted from the lower surface side of the bottom plate 61, and a screw receiver 48 is attached to the tip of the screw 46D protruding toward the reactor 41 side. The elastic member 143 plays a role of a stress absorbing mechanism that absorbs stress fluctuations generated from the bottom plate 61.

[0053] In the above modification, it is preferable to partially form a space below the reactor 41. This can reduce magnetic coupling between the reactor 41 and the bottom plate 61. In addition, it can prevent stress on the bottom plate 61 from being applied to the reactor 41, particularly to the core portion.

[0054] (Summary of the first embodiment) As described above, the refrigerator 1 according to this embodiment includes the insulated box body 50 and the machine room 30 provided below the insulated box body 50. The compressor 31 is disposed in the machine room 30. The power supply unit 20 is disposed next to the compressor 31 in the machine room 30. The compressor 31 is disposed on the bottom plate 61 forming the bottom portion of the machine room 30.

[0055] The power supply unit 20 has main electrical components (e.g., a main wiring board 21, an AC / DC converter circuit 22, etc.) and high heat generating electrical components (e.g., a reactor 41) that generate more heat than the main electrical components. The high heat generating electrical components are disposed on a bottom plate 61.

[0056] Specifically, the power supply unit 20 is composed of a main housing 25 that houses the main wiring board 21 and various electrical components, and a sub-housing 40 that houses a reactor 41, which is a highly heat-generating electrical component. The sub-housing 40 that houses the reactor 41 is disposed on a bottom plate 61 between the compressor 31 and the main housing 25.

[0057] As described above, by housing the reactor 41, which generates more heat than the other electrical components, in the sub-housing 40 separate from the main housing 25 that houses the main wiring board 21 and the other electrical components, it is possible to make it difficult for the heat generated by the reactor 41 to be transmitted to the components in the main housing 25.

[0058] Moreover, by disposing the sub-housing 40 on the bottom plate 61, the work of attaching and detaching the sub-housing 40 can be easily performed. As described above, the reactor 41 is a component for suppressing the intrusion of noise generated in the main wiring board 21 into the indoor power system through the power plug 81, and the specifications required often change depending on the country or region in which it is used. In the configuration according to this embodiment, the reactor 41 is housed in a sub-housing 40 separate from the main housing 25 that houses the main wiring board 21, and is placed on the bottom plate 61, so that even if the size or weight of the reactor 41 is changed, it does not affect the main housing 25. Therefore, the main housing 25 can be shared, and productivity is improved.

[0059] Furthermore, in the configuration according to this embodiment, the reactor 41 is disposed on the resin part 43, so that the vibration of the compressor 31 transmitted to the bottom plate 61 can be absorbed by the resin part 43. Therefore, it is possible to prevent the stress from the bottom plate 61 due to vibration, impact, etc. from being directly transmitted to the reactor 41. This makes it possible to protect the reactor 41. In addition, it is possible to reduce the magnetic coupling between the reactor 41 and the bottom plate 61, and therefore the electrical loss of the reactor 41 can be reduced.

[0060] <Second embodiment> Next, a second embodiment of the present invention will be described. In the second embodiment, the configuration of the sub-accommodation of the power supply unit is different from that of the first embodiment. Other configurations can be applied similarly to those of the first embodiment. Therefore, in the second embodiment, the differences from the first embodiment will be mainly described.

[0061] Fig. 14 shows the internal configuration of the sub-container 240 according to the second embodiment. The sub-container 240 has a reactor 41, a metal cover 42, and the like. The metal cover 42 is not shown in Fig. 14. The metal cover 42 may have the same configuration as in the first embodiment.

[0062] At least one reactor 41 is disposed in the metal cover 42 of the sub-housing 240. The reactor 41 has a higher heat generation property compared to other electrical components disposed in the main housing 25. The reactor 41 is disposed on the bottom plate 61 of the machine chamber 30.

[0063] Fig. 15 shows the configuration of a portion of the bottom plate 61. Fig. 15 shows the area around a hill-shaped portion 261b on which the reactor 41 is placed in the bottom plate 61. The upper surface of the bottom plate 61 includes a lowermost surface 61a and a hill-shaped portion 261b formed by raising the lowermost surface 61a. The hill-shaped portion 261b includes a portion formed by raising the lowermost surface 61a in multiple steps. The reactor 41 is disposed on the hill-shaped portion 261b.

[0064] In Fig. 15, a double-headed arrow is shown along the front-rear direction of refrigerator 1. In Fig. 15, Z1 corresponds to the front direction, and Z2 corresponds to the rear direction. An insertion portion 266 is formed on the front side of hill-shaped portion 261b. Also, screw holes 267 are formed on the rear side of hill-shaped portion 261b. A plurality of grooves 268 are formed between insertion portion 266 and screw holes 267 on hill-shaped portion 261b.

[0065] A front end of the rib 41a of the reactor 41 is inserted into the insertion portion 266. A screw 46 for fixing the reactor is inserted into the screw hole 267. When attaching the reactor 41 to the hill-shaped portion 261b, first, the front end of the rib 41a of the reactor 41 is inserted into the insertion portion 266, and then the rear end of the rib 41a is fixed with the screw 46.

[0066] By disposing the reactor 41 on the hill-shaped portion 261b having the above-mentioned configuration, a space S exists below the reactor 41 (see FIG. 16). This makes it possible to prevent stress fluctuations caused by the bottom plate 61 due to the operation of the compressor 31 from being directly transmitted to the reactor 41. That is, in this embodiment, the hill-shaped portion 261b serves as a stress absorption mechanism that absorbs stress fluctuations caused by the bottom plate 61. In addition, since the multiple grooves 268 are formed along the Z1-Z2 direction in FIG. 15, the area between the insertion portion 266 and the screw hole 267 is reinforced. Therefore, even if stress is applied in the Z1-Z2 direction in FIG. 15, the positional relationship between the insertion portion 266 and the screw hole 267 is suppressed from changing. This suppresses stress transmission to the reactor 41 together with the stress absorption mechanism by providing "play" in the insertion portion 266, similar to the engagement portion 66 in the first embodiment.

[0067] In addition, when the reactor 41 is placed on the hill-shaped portion 261b, the core of the reactor 41 extends in the front-rear direction (Z direction). The groove 268 extends in the front-rear direction (Z direction) along the extension direction of the coil. Since the AC magnetic flux generated in the core is generated in the Z1-Z2 direction in FIG. 15, a magnetic flux change due to mutual induction is also generated in the bottom plate 61 in the same direction. Therefore, an eddy current is generated in the bottom plate 61 in a direction perpendicular to the Z1-Z2 direction in FIG. 15. However, in this embodiment, a plurality of grooves 268 are formed directly below the core of the reactor 41, and these grooves 268 are formed along the above-mentioned Z1-Z2 direction. Therefore, in the direction perpendicular to the Z1-Z2 direction in which the eddy current is generated, these grooves 268 are crossed, and the electrical resistance increases. This makes it possible to suppress the eddy current generated in the bottom plate 61.

[0068] FIG. 17 shows a modified example of the sub-container 240 according to the second embodiment. In the sub-container 240 shown in FIG. 17, the reactor 41 is disposed on the hill-shaped portion 261c. As shown in FIG. 17, the hill-shaped portion 261c has an upper surface that is inclined downward from the front to the rear. When the reactor 41 is attached to the bottom plate 61, the reactor 41 is moved from the rear side of the bottom plate 61 to the front. The inclination of the hill-shaped portion 261c makes it easier to attach the reactor 41 to the bottom plate 61. In addition, since the reactor 41 is inclined backward, the reactor 41 is likely to move backward when the reactor 41 is attached to the bottom plate 61. Therefore, the "play" can be more reliably provided in the insertion portion 266.

[0069] As described above, in this embodiment, the reactor 41 is disposed directly on the bottom plate 61 without using any resin parts, so that the number of parts can be reduced.

[0070] <Third embodiment> Next, a third embodiment of the present invention will be described. In the third embodiment, the configuration of the sub-accommodation of the power supply unit is different from that of the second embodiment. The other configurations can be applied similarly to those of the second embodiment. Therefore, in the third embodiment, the differences from the second embodiment will be mainly described.

[0071] Fig. 18 shows the internal configuration of a sub-container 340 according to the third embodiment. The sub-container 340 has a reactor 41, a metal cover 42, and the like. The metal cover 42 is not shown in Fig. 18. For the metal cover 42, the same configuration as in the first and second embodiments can be applied.

[0072] At least one reactor 41 is disposed within the metal cover 42 of the sub-housing 340. The reactor 41 has a higher heat generation property compared to other electrical components disposed within the main housing 25. The reactor 41 is disposed on the bottom plate 61 of the machine chamber 30.

[0073] Fig. 19 shows the configuration of a portion of the bottom plate 61. Fig. 19 shows the area around the hill-shaped portion 261b of the bottom plate 61 on which the reactor 41 is placed. The upper surface of the bottom plate 61 includes a lowermost surface 61a and a hill-shaped portion 261b formed by raising the lowermost surface 61a. The hill-shaped portion 261b includes a portion formed by raising the lowermost surface 61a in multiple steps. The reactor 41 is disposed on the hill-shaped portion 261b.

[0074] In Fig. 19, a double-headed arrow is illustrated along the front-rear direction of the refrigerator 1. In Fig. 19, Z1 corresponds to the front direction, and Z2 corresponds to the rear direction. Protrusions 366·366 for fixing a reactor are provided near the ends on the front and rear sides of the hill-shaped portion 261b. The protrusions 366 are formed by making a cut in a part of the bottom plate 61 and bending the cut portion. A plurality of grooves 268 similar to those in the second embodiment are formed between the two protrusions 366 on the hill-shaped portion 261b.

[0075] When mounting the reactor 41 on the hill-shaped portion 261b, the projections 366 on the hill-shaped portion 261b are inserted into holes formed at each end of the rib 41a of the reactor 41 in the front-rear direction. Then, metal spring members 367 are attached to each projection 366 (see FIG. 20).

[0076] By mounting reactor 41 on hill-shaped portion 261b as described above, spring member 367 can absorb the stress from bottom plate 61. This makes it possible to prevent stress fluctuations generated from bottom plate 61 due to the operation of compressor 31 or shocks during transportation or installation of refrigerator 1 from being directly transmitted to reactor 41. That is, in this embodiment, protrusion 366 of hill-shaped portion 261b and spring member 367 serve as a stress absorption mechanism that absorbs stress fluctuations generated from bottom plate 61.

[0077] According to the configuration of the sub-container 340 of this embodiment, the reactor 41 can be fixed onto the bottom plate 61 without using screws.

[0078] <Fourth embodiment> Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, the configuration of the sub-accommodation of the power supply unit is different from that of the third embodiment. The other configurations can be applied similarly to those of the third embodiment. Therefore, in the fourth embodiment, the differences from the third embodiment will be mainly described.

[0079] Fig. 21 shows the internal configuration of a sub-container 440 according to the fourth embodiment. The sub-container 440 has a reactor 41, a metal cover 42, and the like. The metal cover 42 is not shown in Fig. 21. The metal cover 42 may have the same configuration as in the first embodiment.

[0080] At least one reactor 41 is disposed within the metal cover 42 of the sub-housing 440. The reactor 41 has a higher heat generation property compared to other electrical components disposed within the main housing 25. The reactor 41 is disposed on the bottom plate 61 of the machine chamber 30.

[0081] Fig. 22 shows the configuration of a portion of the bottom plate 61. Fig. 22 shows the peripheral area of ​​the bottom plate 61 on which the reactor 41 is placed. The upper surface of the bottom plate 61 includes a lowermost surface 61a and a hill-shaped portion 61b formed by raising the lowermost surface 61a.

[0082] The sub-container 440 is disposed on the hill-shaped portion 61b. In this embodiment, the sub-container 440 is disposed so as to bridge the front hill-shaped portion 61b and the rear hill-shaped portion 61b. The lowermost surface 61a is located below the sub-container 440, between the front hill-shaped portion 61b and the rear hill-shaped portion 61b. As a result, a space S is partially formed below the sub-container 40 (see FIG. 23).

[0083] In Fig. 22, a double-headed arrow is shown along the front-rear direction of the refrigerator 1. In Fig. 21, Z1 corresponds to the front direction, and Z2 corresponds to the rear direction. One protrusion 366 for fixing a reactor is provided on the hill-shaped portion 61b on the front side (Z1 side). One protrusion 366 for fixing a reactor is provided on the hill-shaped portion 61b on the rear side (Z2 side). The protrusion 366 is formed by making a cut in part of the bottom plate 61 and bending the cut portion.

[0084] When mounting the reactor 41 on the hill-shaped portion 61b, the projections 366 on the hill-shaped portion 61b are inserted into holes formed at each end of the rib 41a of the reactor 41 in the front-rear direction. Then, metal spring members 367 are attached to each projection 366.

[0085] By mounting reactor 41 on hill-shaped portion 61b as described above, spring member 367 can absorb the stress from bottom plate 61. This makes it possible to prevent stress fluctuations generated from bottom plate 61 due to the operation of compressor 31 or shocks during transportation or installation of refrigerator 1 from being directly transmitted to reactor 41. That is, in this embodiment, protrusion 366 of hill-shaped portion 61b and spring member 367 serve as a stress absorption mechanism that absorbs stress fluctuations generated from bottom plate 61.

[0086] It should be noted that reinforcing grooves are formed in the vicinity of each protrusion 366. In this embodiment, a plurality of grooves 468 extending in the left-right direction are formed on the front side (Z1 side) of the hill-shaped portion 61b on the front side (Z1 side) of the protrusion 366 on the rear side (Z2 side). Similarly, a plurality of grooves 468 extending in the left-right direction are formed on the front side (Z1 side) of the protrusion 366 on the rear side (Z2 side) of the hill-shaped portion 61b.

[0087] With this configuration, the reactor 41 is disposed on the hill-shaped portion 61b in which the groove 468 is provided (see FIG. 23). The area of ​​the bottom plate 61 in which the groove 468 is formed has a higher strength than the flat area of ​​the bottom plate 61. Therefore, even if the flat area of ​​the bottom plate 61 is deformed by vibration transmitted from the compressor 31 to the bottom plate 61, the area of ​​the bottom plate 61 in which the groove 468 is formed is unlikely to deform. Therefore, deformation of each protrusion 366 can be suppressed, and the reactor 41 can be disposed in a more stable state. The groove 468 may be formed to extend in the Z1-Z2 direction, not limited to the left-right direction.

[0088] Furthermore, by disposing the reactor 41 on the hill-shaped portion 61b having the above-mentioned configuration, a space S exists below the reactor 41 (see FIG. 23). This reduces the magnetic coupling between the reactor 41 and the bottom plate 61, and suppresses the generation of eddy currents in the reactor 41. Note that, as long as the above-mentioned space is formed, the space between the hill-shaped portions 61b does not have to be the lowest surface.

[0089] The lowermost surface 61a in this embodiment may be formed in advance to reinforce the bottom plate 61. According to the configuration of the sub-container 440 of this embodiment, the reactor 41 can be fixed onto the bottom plate 61 by utilizing the lowermost surface 61a with only slight modification of the bottom plate 61.

[0090] (summary) A refrigerator (e.g., refrigerator 1) according to one aspect of the present invention includes a heat-insulating box (e.g., heat-insulating box 50), a machine room (e.g., machine room 30) provided below the heat-insulating box, a bottom plate (e.g., bottom plate 61) forming the bottom surface of the machine room, a compressor (e.g., compressor 31) arranged on the bottom plate, and a power supply unit (e.g., power supply unit 20) arranged in the machine room. The power supply unit has main electrical components (e.g., main wiring board 21, AC / DC converter circuit 22, etc.) and high heat generating electrical components (e.g., reactor 41, etc.) that generate more heat than the main electrical components. The high heat generating electrical components are arranged on the bottom plate.

[0091] In the refrigerator (e.g., refrigerator 1) according to one aspect of the present invention described above, the bottom plate (e.g., bottom plate 61) has a lowermost surface (e.g., lowermost surface 61a) and a hill-shaped portion (e.g., hill-shaped portions 61b, 261b) formed by raising the lowermost surface, and the high heat-generating electrical component (e.g., reactor 41, etc.) may be disposed on the hill-shaped portion.

[0092] In the refrigerator (e.g., refrigerator 1) according to one aspect of the present invention described above, the highly heat-generating electrical component (e.g., reactor 41, etc.) may be disposed on a resin component (e.g., resin component 43) provided on the bottom plate (e.g., bottom plate 61).

[0093] In the refrigerator (for example, refrigerator 1) according to one aspect of the present invention described above, a space (for example, space S) may be provided below the high heat generating electrical component (for example, reactor 41, etc.).

[0094] In the refrigerator (e.g., refrigerator 1) according to one aspect of the present invention described above, a stress absorbing mechanism (e.g., an engagement portion between front protrusion 75 of resin part 43 and engagement portion 66 of bottom plate 61, elastic member 143, hill-shaped portion 261b, a combination of protrusion portion 366 and spring member 367, etc.) that absorbs stress fluctuations generated from the bottom plate (e.g., bottom plate 61) may be provided on the arrangement surface of the high heat-generating electrical component (e.g., reactor 41, etc.).

[0095] The refrigerator according to one aspect of the present invention (for example, refrigerator 1) may further include a conductive case (for example, metal cover 42) that covers the high heat generating electrical components (for example, reactor 41, etc.).

[0096] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. In addition, configurations obtained by combining the configurations of the different embodiments described in this specification are also included in the scope of the present invention. [Explanation of symbols]

[0097] 1: Refrigerator 20: Power supply unit 21: Main wiring board (main electrical components) 22: AC / DC converter circuit (main electrical components) 25: Main housing 30: Machine room 31: Compressor 40: Sub-container 41: Reactor (high heat generating electrical components) 42: Metal cover (conductive case) 43: Plastic parts 50: Insulated box 61:Bottom plate 61a: Bottom surface of the base plate 61b: Hill shaped part 66: Engagement part (stress absorption mechanism) 143: Elastic member (stress absorption mechanism) 240: Sub-container 261b: Hill-shaped section (stress absorption mechanism) 340: Sub-container 366: Protrusion (stress absorption mechanism) 367: Spring components (stress absorption mechanism) 440: Sub-container S: Space

Claims

1. A heat-insulating box; A machine room provided below the insulating box; A bottom plate forming a bottom surface of the machine room; A compressor disposed on the bottom plate; A power supply unit disposed in the machine room; Equipped with the power supply unit includes a main electrical component and a high heat generating electrical component that generates more heat than the main electrical component, The high heat generating electrical component is disposed on the bottom plate. refrigerator.

2. The bottom plate has a lowermost surface and a hill-shaped portion formed by raising the lowermost surface, The high heat generating electrical component is disposed on the hill-shaped portion.

2. The refrigerator according to claim 1.

3. The high heat generating electrical component is disposed on a resin component provided on the bottom plate.

2. The refrigerator according to claim 1.

4. A space is provided below the high heat generating electrical component.

2. The refrigerator according to claim 1.

5. a stress absorbing mechanism for absorbing stress fluctuations generated from the bottom plate is provided on the surface on which the high heat generating electrical components are disposed; 2. The refrigerator according to claim 1.

6. The device further includes a conductive case that covers the high heat generating electrical components. A refrigerator according to any one of claims 1 to 5.

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