Refrigerator

Abstract

Provided is a refrigerator in which heat generated from an electric component having a high heat generation property is less likely to be transferred to other electric components. The refrigerator (1) is provided with a heat insulation box body (50) and a machine room (30) arranged below the heat insulation box body (50). The bottom surface of the machine chamber (30) is formed by a bottom plate (61). A compressor (30) is disposed on the bottom plate (61). A power supply unit (20) is disposed in the machine chamber (30). The power supply unit (20) has a main electric component and a high heat-generating electric component having a higher heat-generating property than the main electric component. The high-heat-generating electrical component is disposed on the base plate (61).

Description

Technical Field

[0001] The present invention relates to a refrigerator having a machine room. Background Art

[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 is provided below the back side of the heat-insulating box, and a compressor and the like constituting a refrigeration cycle are arranged in the machine room.

[0003] Furthermore, the refrigerator includes a power supply unit for controlling components such as a compressor, etc. The power supply unit includes a wiring board, various electrical components, and the like.

[0004] Since these electrical components have heat generation properties, the power supply unit equipped with the electrical components is often arranged in a machine room located outside the heat-insulating box. For example, Japanese Patent Application Laid-Open No. 2021-76305 discloses a refrigerator in which a power system substrate 91 is arranged in a machine room 39 . Summary of the invention

[0005] Among the various electrical components mounted on the wiring substrate, there are components such as reactors for EMC countermeasures that have higher heat generation than other electrical components. In the refrigerator disclosed in Japanese Patent Publication No. 2021-76305, a reactor 93 is arranged in the shell body 81 that accommodates the power system substrate 91. However, in such a structure, the heat generated in the reactor is difficult to release to the outside, and there is a possibility that the heat is retained in the shell body.

[0006] Therefore, an object of the present invention is to provide a refrigerator that can prevent heat generated from an electrical component with high heat generation (high heat generation electrical component) from being transferred to other electrical components.

[0007] A refrigerator according to one aspect of the present invention includes: an insulating box body; a machine room disposed below the insulating box body; a base plate forming the bottom surface of the machine room; a compressor disposed on the base plate; and a power supply unit disposed in the machine room, the power supply unit having: main electrical components; and high-heat-generating electrical components having a higher heat-generating property than the main electrical components, the high-heat-generating electrical components being disposed on the base plate. Beneficial Effects

[0008] According to the refrigerator of one aspect of the present invention, it is possible to prevent heat generated from a high-heat-generating electrical component disposed in a machine room from being transferred to other electrical components in the machine room. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective view showing the structure of the back side of the refrigerator according to one embodiment. Figure 2 Yes means Figure 1 A three-dimensional diagram of the structure inside the mechanical room of the refrigerator shown. Figure 3 Yes means Figure 2 A three-dimensional view of the internal structure of the main container and the auxiliary container shown. Figure 4 Yes means Figure 1 Schematic diagram of the circuit configuration in a power supply unit included in the refrigerator shown. Figure 5 Yes means Figure 2 A perspective view showing the internal structure of a sub-containment body included in the machine room shown. Figure 6 Yes means Figure 2 A perspective view showing the internal structure of a sub-containment body included in the machine room shown. Figure 7 Yes means Figure 2 A perspective view showing the internal structure of a sub-containment body included in the machine room shown. Figure 8 It means forming Figure 2 A perspective view of the floor of the bottom surface of the machinery room is shown. Fig. 9 It is a schematic diagram showing the structure of the outlet portion of the wiring from the auxiliary housing. Fig.10 It is a schematic diagram showing the structure of a sub-accommodation body according to a first modified example. Fig.11 It is a schematic diagram showing the structure of a sub-accommodation body according to a second modified example. Fig.12 It is a schematic diagram showing the structure of a sub-accommodation body according to a third modified example. Fig.13 It is a schematic diagram showing the structure of a sub-accommodation body according to a fourth modified example. Fig.14 It is a perspective view showing the internal structure of a sub-storage body provided in the refrigerator according to the second embodiment. Fig.15 It means that the configuration has Fig.14 A three-dimensional view of a portion of the bottom plate of the secondary receiving body shown. Fig.16 Yes means Fig.14 The cross-sectional view of the auxiliary storage body shown in the left-right direction. Fig.17 It is a diagram showing a modification example of the second embodiment. Fig.18 It is a perspective view showing the internal structure of a sub-storage body provided in the refrigerator according to the third embodiment. Fig.19 Yes means the configuration has Fig.18A three-dimensional view of a portion of the bottom plate of the secondary receiving body shown. Fig. 20 It means in Fig.18 The schematic cross-sectional view of the structure in which the reactor is mounted on the bottom plate in the secondary containment body shown. Fig.21 It is a perspective view showing the interior of a sub-storage body provided in a refrigerator according to a fourth embodiment. Fig. 22 Yes means the configuration has Fig.21 A three-dimensional view of a portion of the bottom plate of the secondary receiving body shown. Fig.23 Yes means Fig.21 A cross-sectional view showing a cross section of the auxiliary storage body in the front-rear direction. DETAILED DESCRIPTION

[0010] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals are used for the same components. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

[0011] <First Embodiment> (Overall structure of refrigerator) First, the overall structure of the refrigerator 1 according to the first embodiment will be described. Figure 1 The structure of the back side of the refrigerator 1 is shown. In this embodiment, the surface provided with a door (not shown) is referred to as the front side or front surface of the refrigerator. And, based on the front surface as a reference, the surfaces of the refrigerator 1 are set as the top surface, the side surface, the back surface, and the bottom surface based on the position when the refrigerator 1 is set in a normal state.

[0012] In the refrigerator 1, as a heat insulating structure for insulating each storage space from the surrounding, a heat insulating box 50 is provided. The outer peripheral surface of the heat insulating box 50 is mainly composed of an upper surface 50a, a side surface 50b, a back surface 50c, and a bottom surface 50d. A machine room 30 is provided on the back side below the heat insulating box 50. The machine room 30 is located outside the heat insulating box 50. A compressor 31 and other heat generating components are arranged in the machine room 30.

[0013] (Structure of the machinery room) Next, a more detailed structure of the machine room 30 provided at the lower rear surface side of the heat insulating box body 50 will be described.

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

[0015] The machine room 30 mainly includes a compressor 31, a power supply unit 20, and an evaporation tray (not shown). The compressor 31 is located slightly to the right of the machine room 30 when viewed from the back (left when viewed from the front). Figure 1 Although not shown in the figure, the evaporation dish is arranged above the compressor 31.

[0016] The power supply unit 20 is arranged next to the compressor 31. Figure 1 In the illustrated example, the power supply unit 20 is arranged on the left side of the compressor 31 (on the right side of the compressor 31 when viewed from the front).

[0017] In addition, the compressor 31 and the power supply unit 20 may also be connected to Figure 1 The example shown is configured in reverse left and right.

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

[0019] Figure 2 The structure inside the machine room 30 is shown. Figure 2 The state of the machine room 30 provided in the refrigerator 1 as viewed from the back side is shown. Figure 3 The internal structures of the main container 25 and the auxiliary container 40 are shown.

[0020] As described above, the compressor 31 is arranged slightly to the right in the machine room 30 when viewed from the back. In addition, the main container 25 of the power supply unit 20 is arranged near the left end (right end when viewed from the front) in the machine room 30 when viewed from the back. The auxiliary container 40 of the power supply unit 20 is arranged between the compressor 31 and the main container 25. The auxiliary container 40 is arranged on the bottom plate 61.

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

[0022] Figure 3 Indicates the state after the second shell part 26b of the housing shell 26 is removed. The housing shell 26 contains the main wiring substrate 21 and various electrical components. As electrical components, for example, ICs (specifically, AC / DC converter circuits 22, etc.), capacitors, drive elements, coils, etc. can be listed, but are not limited to these. Various electrical components can be mounted on the main wiring substrate 21 or arranged at any position in the main housing body 25. Various electrical components (for example, the main wiring substrate 21, AC / DC converter circuit 22, etc.) contained in the main housing body 25 are called main electrical components.

[0023] The secondary containment body 40 includes a reactor 41, a metal cover 42, a resin member 43, and the like. The metal cover 42 is formed of a conductive metal material. The resin member 43 is formed of a non-conductive resin material. The metal cover 42 is a conductive shell covering the reactor 41. The resin member 43 is arranged on the bottom plate 61 and carries the reactor 41. That is, the resin member 43 serves as a base for holding the reactor 41.

[0024] At least one reactor 41 is arranged in the metal cover 42 of the secondary containment body 40. The reactor 41 has a higher heat generation than other electrical components arranged in the main containment body 25. Therefore, the reactor 41 can also be called a high heat generation electrical component. In addition, as a high heat generation electrical component other than the reactor 41, for example, an intelligent power module or the like, which drives the compressor 31, can be cited.

[0025] Figure 4 The circuit configuration in the power supply unit 20 is schematically shown. The power supply unit 20 is connected to a power plug 81 via a harness (wiring) 82. Electric 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] Specifically, if Figure 4 As shown, the harness 82 connects the power plug 81 and the main wiring substrate 21 via the connector 83. In addition, the harness 84 connects the reactor 41 and the main wiring substrate 21 via the connector 85.

[0027] like Figure 4 As shown in the circuit diagram of FIG. 8 , the reactor 41 is arranged between the power plug 81 and the AC / DC converter circuit 22 arranged on the main wiring substrate 21. By providing such a reactor 41, it is possible to suppress the noise generated in the main wiring substrate 21 from intruding into the indoor power supply system through the power plug 81.

[0028] (Constitution of the secondary container) Next, a more detailed structure of the sub-housing body 40 included in the power supply unit 20 will be described.

[0029] Figures 5 to 7 FIG. 4 shows the internal structure of the auxiliary housing 40 in the machine room 30. Figure 5 , the reactor 41 included in the auxiliary housing 40 is shown removed, and the main housing 25 is omitted. Figure 6 Indicates from Figure 5 The state shown is a state where the compressor 31 is removed. Figure 7 Indicates from Figure 5 The state shown is a state where the resin member 43 is removed. Figure 8 The structure of the bottom plate 61 alone is shown in FIG.

[0030] The upper surface of the bottom plate 61 forms the bottom surface of the machine room 30. Figure 8 As shown, the upper surface of the bottom plate 61 is not a flat surface, but a concave-convex surface having a partially raised portion. 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 section. In addition, the hill-shaped portion 61b may also include a portion formed by raising the lowermost surface 61a by multiple layers.

[0031] The compressor 31 and the auxiliary containment body 40 are fixedly arranged on the hill-shaped portion 61b. In the present embodiment, the auxiliary containment body 40 is arranged in a manner that straddles the hill-shaped portion 61b on the front side and the hill-shaped portion 61b on the rear side. Moreover, below the auxiliary containment body 40, the lowest surface 61a is located between the hill-shaped portion 61b on the front side and the hill-shaped portion 61b on the rear side. Thus, a space is partially formed below the auxiliary containment body 40. In addition, if the above-mentioned space is formed, the area between the hill-shaped portions 61b may not be the lowest surface. In addition, when the above-mentioned space is formed on the resin component 43 described later, the concave and convex surface of the bottom plate 61 may not be provided.

[0032] The engaging portion 66 engaging with the auxiliary housing body 40 is provided at the position where the auxiliary housing body 40 is arranged in the hill-shaped portion 61b. The engaging portion 66 is formed by cutting a portion of the bottom plate 61 and bending the cut portion. In this embodiment, two engaging portions 66 are provided on the front side of the bottom plate 61.

[0033] The front side of the auxiliary housing body 40 is attached to the bottom plate 61 via the engaging portion 66. In addition, the rear side of the auxiliary housing body 40 is fixed to the rear vertical wall 61c of the bottom plate 61. In this embodiment, the resin member 43 of the auxiliary housing body 40 is fixed to the bottom plate 61 (see Figure 6 ).

[0034] The resin member 43 can be formed of, for example, an electrically insulating material such as plastic or rubber.

[0035] In this embodiment, the resin member 43 is formed by molding hard plastic into a predetermined shape. The resin member 43 includes a reactor placement portion 71, screw fixing portions 72, 72 for fixing the reactor, a screw fixing portion 73 for fixing the metal cover 42, a rear extension portion 74, and front protrusions 75, 75, etc. (see Figure 7 ).

[0036] The reactor 41 is arranged on the reactor arrangement portion 71 in the resin member 43 (see Figure 3 ). When the reactor 41 is arranged on the reactor arrangement portion 71, the core of the coil (not shown) contained in the reactor 41 extends in the front-to-back direction. Moreover, the screw fixing portions 72, 72 are respectively located at both ends of the reactor arrangement portion 71 in the front-to-back direction.

[0037] Ribs 41a extending in the front-to-back direction are provided on both sides of the iron core of the reactor 41. The ribs 41a are a part of the outer frame that covers and protects the iron core and fixes the reactor 41 body. Holes for inserting screws 46 for fixing the reactor are formed near each end of the ribs 41a in the front-to-back direction (see FIG. Figure 5 ). With the main body of the reactor 41 disposed between the two screw fixing portions 72, 72, the holes of the rib 41a are disposed on the screw fixing portions 72. In this state, the reactor 41 is fixed to the resin member 43 by inserting the screws 46 into the screw fixing portions 72.

[0038] The reactor arrangement portion 71 is formed with lattice-shaped ribs. That is, the reactor 41 is arranged on the lattice-shaped ribs. Thus, a space is partially formed below the reactor 41. According to such a configuration, when the compressor 31 is in operation, the possibility of the vibration transmitted from the compressor 31 to the bottom plate 61 being transmitted to the reactor 41 can be reduced.

[0039] In addition, the iron core of the reactor 41 can be separated from the bottom plate 61 by a predetermined distance. As a result, the AC magnetic flux generated in the iron core can be prevented from being transmitted to the bottom plate 61 by mutual induction. Therefore, the generation of eddy current on the bottom plate 61 can be prevented, and the loss of the reactor 41 can be reduced. In order to enhance the effect of reducing the mutual induction, a magnetic material such as a ferrite material can also be arranged in the space below the reactor 41.

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

[0041] The rear extension 74 is provided at the rear end of the resin member 43. When the front protrusion 75 is engaged with the engagement portion 66 of the bottom plate 61, the rear end surface of the rear extension 74 is close to the rear vertical wall 61c of the bottom plate 61. In this state, the screw 45a for fixing the resin member is inserted from the rear vertical wall 61c, and the resin member 43 is fixed to the bottom plate 61 (see Figure 3 ).

[0042] In addition, when the rear end side of the resin member 43 is fixed to the bottom plate 61 by the screw 45a, the front protrusion 75 of the resin member 43 is inserted into the engaging portion 66 formed by bending the cutout portion of the bottom plate 61. That is, the front protrusion 75 of the resin member 43 is not firmly fixed to the engaging portion 66 of the bottom plate 61, but has a certain degree of "play".

[0043] According to this structure, it is possible to prevent stress changes generated from the bottom plate 61 due to the operation of the compressor 31, the impact during the transportation or installation of the refrigerator 1, etc. from being directly transmitted to the resin member 43. That is, the engagement portion between the front protrusion 75 of the resin member 43 and the engagement portion 66 of the bottom plate 61 is a stress absorbing mechanism that absorbs the stress changes generated from the bottom plate 61.

[0044] The metal cover 42 is arranged on the resin member 43 so as to cover the reactor 41 arranged on the resin member 43. In this state, the screws 45b are inserted into the screw fixing parts 73 of the resin member 43 from the openings formed in the metal cover 42. Thus, the metal cover 42 is fixed to the resin member 43.

[0045] Fig. 9 The structure of the wiring (wiring harness 84) connected to the reactor 41 is shown. The wiring harness 84 extending from the reactor 41 to the main wiring substrate 21 is led out to the outside of the auxiliary housing 40 from the opening 42H formed on the side of the metal cover 42. A sealant 86 is wound around the outer periphery of the wiring harness 84 located at the opening 42H. By providing such a sealant 86 on the wiring harness 84, it is possible to prevent liquid such as water from intruding into the interior of the auxiliary housing 40 from the opening 42H.

[0046] (Variation Example) Next, a modification of the auxiliary housing body 40 of the first embodiment will be described.

[0047] Fig.10 The structure of the auxiliary container 40 of the first modified example is shown in FIG. Fig.10 In the auxiliary housing 40 shown in FIG. 1 , the reactor 41 is disposed on the resin member 43 in a state in which the vertical direction is reversed from that in the first embodiment. Fig.10In the embodiment, the rib 41a is located on the lower surface side of the reactor 41. In the first modification, the screw fixing portion for fixing the reactor is provided on the same surface as the reactor placement portion 71.

[0048] exist Fig.10 In the illustrated structure, the rear extension portion 42a is provided on the metal cover 42. The rear extension portion 42a of the metal cover 42 is provided so as to cover the rear extension portion 74 of the resin member 43. Furthermore, the rear end surface of the rear extension portion 42a of the metal cover 42 is in a state close to the rear vertical wall 61c of the bottom plate 61. In this state, the screw 45a for fixing the resin member is inserted from the rear vertical wall 61c, and the metal cover 42 and the resin member 43 are fixed to the bottom plate 61.

[0049] As described above, a portion of the conductive metal cover 42 (i.e., the rear extension 42a) contacts the rear longitudinal wall 61c of the bottom plate 61 which is also conductive, so that the metal cover 42 is at ground potential. As a result, the metal cover 42 is grounded, and thus the electromagnetic waves generated from the reactor 41 disposed in the metal cover 42 can be cut off. Therefore, the influence of the electromagnetic waves on the main wiring substrate 21 and the electrical components in the main housing 25 can be suppressed. In addition, such a configuration can also be applied to the auxiliary housing 40 of the first embodiment.

[0050] Fig.11 4 shows the structure of the secondary container 40 of the second modified example. In the second modified example, a flat resin plate is used as the resin member 43. This makes it easier to mold the resin member 43. The reactor 41 is fixed to the upper surface of the resin member 43 by screws 46A. In addition, the resin member 43 is fixed to the bottom plate 61 by screws 46B. As an example, Fig.11 As shown, the screws 46B are inserted from the lower surface of the bottom plate 61 .

[0051] Fig.12 The structure of the auxiliary containment body 40 of the third variant is shown. As in the second variant, in the third variant, a flat resin plate is used as the resin component 43. In addition, in the third variant, the resin component 43 is arranged on the hill-shaped portion 61b. The hill-shaped portion 61b is raised one section higher than the lowest surface 61a of the bottom plate 61, and there is a space S below the hill-shaped portion 61b. Therefore, when the reactor 41 and the resin component 43 are fixed to the bottom plate 61, the screw 46C is driven in from the upper side, and even when the front end of the screw passes through the bottom plate 61, the front end of the screw can be kept in the space S. Therefore, when the refrigerator 1 is set on the ground, it is possible to prevent the front end of the screw from hitting the ground.

[0052] Fig.13FIG. 4 shows the structure of the secondary container 40 of the fourth modification. In the fourth modification, as a member for arranging the reactor 41, an elastic member 143 such as rubber is used instead of the resin member 43. Fig.13 As shown in FIG. 1 , an elastic member 143 is disposed on the bottom plate 61, and a reactor 41 is disposed on the elastic member 143. The reactor 41 and the resin member 43 are fixed to the bottom plate 61 by screws 46D. Fig.13 In the example shown, the screw 46D is inserted from the bottom side of the bottom plate 61, and the screw support 48 is attached to the front end of the screw 46D protruding toward the reactor 41. The elastic member 143 functions as a stress absorbing mechanism for absorbing stress fluctuations generated from the bottom plate 61.

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

[0054] (Summary of the First Embodiment) As described above, the refrigerator 1 of this embodiment includes a heat-insulating box body 50 and a machine room 30 provided below the heat-insulating box body 50. A compressor 31 is disposed in the machine room 30. In addition, in the machine room 30, a power supply unit 20 is disposed next to the compressor 31. The compressor 31 is disposed on a bottom plate 61 forming a bottom portion of the machine room 30.

[0055] The power supply unit 20 includes main electrical components (eg, the main wiring board 21 , the AC / DC converter circuit 22 , etc.) and high heat generating electrical components (eg, the reactor 41 ) having a higher heat generating capacity than the main electrical components.

[0056] Specifically, the power supply unit 20 is composed of a main housing 25 that houses a main wiring substrate 21 and various electrical components, and a sub-housing 40 that houses a reactor 41, which is a high-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 having a higher heat generation than other electrical components in a sub-container 40 which is different from the main container 25 that houses the main wiring substrate 21 and other electrical components, the heat generated by the reactor 41 can be difficult to be transferred to the components in the main container 25.

[0058] In addition, by arranging the auxiliary container 40 on the bottom plate 61, the installation and removal operations of the auxiliary container 40 can be easily performed. As described above, the reactor 41 is a component for suppressing the noise generated in the main wiring substrate 21 from intruding into the indoor power supply system through the power plug 81, and the specifications required are often changed depending on the country and region of use. In the structure of this embodiment, since the reactor 41 is housed in the auxiliary container 40 different from the main container 25 that houses the main wiring substrate 21 and is placed on the bottom plate 61, even if the size, weight, etc. of the reactor 41 are changed, it will not affect the main container 25. Therefore, the main container 25 can be shared, and productivity is improved.

[0059] Furthermore, in the configuration of the present embodiment, by arranging the reactor 41 on the resin member 43, the resin member 43 can absorb the vibration of the compressor 31 transmitted to the bottom plate 61. Therefore, it is possible to avoid the stress from the bottom plate 61 caused by vibration, impact, etc. being directly transmitted to the reactor 41. Thus, the reactor 41 can be protected. In addition, the magnetic coupling between the reactor 41 and the bottom plate 61 can be reduced, and the electrical loss of the reactor 41 can be reduced.

[0060] <Second Embodiment> Next, a second embodiment of the present invention is described. In the second embodiment, the structure of the auxiliary housing of the power supply unit is different from that of the first embodiment. Other structures can be the same as those of the first embodiment. Therefore, in the second embodiment, the description will be centered on the points that are different from the first embodiment.

[0061] Fig.14 FIG. 2 shows the internal structure of the auxiliary container 240 of the second embodiment. The auxiliary container 240 includes a reactor 41 and a metal cover 42. Fig.14 In the figure, the metal cover 42 is omitted. As for the metal cover 42, the same structure as the first embodiment can be applied.

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

[0063] Fig.15 The structure of a part of the bottom plate 61 is shown. Fig.15 The figure shows the area around the hill-shaped portion 261b on the bottom plate 61 where the reactor 41 is placed. The upper surface of the bottom plate 61 includes the lowermost surface 61a and the 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 layers. The reactor 41 is arranged on the hill-shaped portion 261b.

[0064] exist Fig.15 In FIG. 1 , two arrows are shown along the front-rear direction of the refrigerator 1. Fig.15 In the figure, Z1 corresponds to the front direction, and Z2 corresponds to the rear direction. An insertion portion 266 is formed on the front side of the hill-shaped portion 261b. In addition, a threaded hole 267 is formed on the rear side of the hill-shaped portion 61b. A plurality of grooves 268 are formed between the insertion portion 266 and the threaded hole 267 on the hill-shaped portion 261b.

[0065] The front end of the rib 41a of the reactor 41 is inserted into the insertion portion 266. The screw 46 for fixing the reactor is inserted into the threaded hole 267. When the reactor 41 is mounted on 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 arranging the reactor 41 on the hill-shaped portion 261b having the above-mentioned structure, a space S is provided below the reactor 41 (see Fig.16 ). Thus, it is possible to prevent stress changes generated from the bottom plate 61 due to the operation of the compressor 31 from being directly transmitted to the reactor 41 side. That is, in this embodiment, the hill-shaped portion 261b becomes a stress absorbing mechanism for absorbing stress changes generated from the bottom plate 61. In addition, since the plurality of grooves 268 are arranged along Fig.15 The Z1-Z2 direction is formed, thereby reinforcing the insertion portion 266 and the threaded hole 267. Therefore, even if Fig.15 When stress is applied in the Z1-Z2 direction, the positional relationship between the insertion portion 266 and the threaded hole 267 is also suppressed from changing. Thus, similar to the engagement portion 66 in the first embodiment, together with the stress absorbing mechanism generated by providing a "play" in the insertion portion 266, stress on the reactor 41 is suppressed.

[0067] In addition, when the reactor 41 is disposed on the hill-shaped portion 261b, the core of the reactor 41 extends in the front-to-back direction (Z direction). Furthermore, the slot 268 extends in the front-to-back direction (Z direction) along the extension direction of the coil. Since the AC magnetic flux generated on the core is generated Fig.15 The Z1-Z2 direction of the magnets causes a change in magnetic flux based on mutual induction in the same direction on the bottom plate 61. Fig.15 In the present embodiment, however, a plurality of slots 268 are formed directly below the core of the reactor 41, and these slots 268 are formed along the above-mentioned Z1-Z2 direction. Therefore, in the direction perpendicular to the direction in which the eddy current is generated, i.e., the Z1-Z2 direction, the resistance increases by crossing these slots 268. Thus, the eddy current generated in the bottom plate 61 can be suppressed.

[0068] Fig.17 2 shows a modified example of the auxiliary housing body 240 of the second embodiment. Fig.17 The auxiliary container 240 shown in the figure has a reactor 41 disposed on the hill-shaped portion 261c. Fig.17 As shown, the upper surface of the hill-shaped portion 261c is inclined downward from the front toward the rear. When the reactor 41 is installed on the base plate 61, the reactor 41 is moved from the rear side of the base plate 61 to the front. By having an inclination like the hill-shaped portion 261c, it is easy to install the reactor 41 on the base plate 61. In addition, since the reactor 41 is inclined backward, when the reactor 41 is installed on the base plate 61, the reactor 41 is easy to approach the rear. Therefore, it is possible to more reliably set the "play" in the insertion portion 266.

[0069] As described above, in the present embodiment, the reactor 41 is directly arranged on the bottom plate 61 without using a resin member. Therefore, the number of components can be reduced.

[0070] <Third Embodiment> Next, a third embodiment of the present invention will be described. In the third embodiment, the structure of the auxiliary housing of the power supply unit is different from that of the second embodiment. Other structures can be the same as those of the second embodiment. Therefore, in the third embodiment, the description will be centered on the points that are different from the second embodiment.

[0071] Fig.18 The following is a diagram showing the internal structure of the auxiliary container 340 according to the third embodiment. The auxiliary container 340 includes a reactor 41, a metal cover 42, and the like. Fig.18 The metal cover 42 is omitted in the figure. As for the metal cover 42, the same structure as the first and second embodiments can be applied.

[0072] At least one reactor 41 is disposed in the metal cover 42 of the auxiliary housing 340. The reactor 41 has a higher heat generation than other electrical components disposed in the main housing 25. The reactor 41 is disposed on the bottom plate 61 of the machine room 30.

[0073] Fig.19 The structure of a part of the bottom plate 61 is shown. Fig.19 The figure shows the area around the hill-shaped portion 261b on the bottom plate 61 where the reactor 41 is placed. The upper surface of the bottom plate 61 includes the lowermost surface 61a and the 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 layers. The reactor 41 is arranged on the hill-shaped portion 261b.

[0074] exist Fig.19 In FIG. 1 , two arrows are shown along the front-rear direction of the refrigerator 1. Fig.19 In the embodiment, Z1 corresponds to the front direction and Z2 corresponds to the rear direction. Protrusions 366, 366 for fixing the reactor are provided near the ends of the front side and the rear side of the hill-shaped portion 261b. The protrusion 366 is formed by forming a cutout in a part of the bottom plate 61 and bending the cutout part. Between the two protrusions 366 on the hill-shaped portion 261b, a plurality of grooves 268 are formed similar to those in the second embodiment.

[0075] When the reactor 41 is mounted on the protrusion 261b, the holes formed at the front and rear ends of the rib 41a of the reactor 41 are inserted into the protrusions 366 on the protrusion 261b. Then, the metal spring members 367 are mounted on the protrusions 366 (see Fig. 20 ).

[0076] As described above, by attaching the reactor 41 to the hill-shaped portion 261b, the spring member 367 can absorb the stress from the bottom plate 61. Therefore, it is possible to prevent the stress variation generated from the bottom plate 61 due to the operation of the compressor 31, the impact during the transportation or installation of the refrigerator 1, etc. from being directly transmitted to the reactor 41 side. That is, in this embodiment, the protrusion 366 of the hill-shaped portion 261b and the spring member 367 serve as a stress absorbing mechanism that absorbs the stress variation generated from the bottom plate 61.

[0077] According to the configuration of the auxiliary housing body 340 of the present embodiment, the reactor 41 can be fixed to 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 structure of the auxiliary housing of the power supply unit is different from that of the third embodiment. Other structures can be the same as those of the third embodiment. Therefore, in the fourth embodiment, the description will be centered on the points that are different from the third embodiment.

[0079] Fig.21 2 shows the internal structure of the auxiliary container 440 of the fourth embodiment. The auxiliary container 440 includes a reactor 41, a metal cover 42, and the like. Fig.21 The metal cover 42 is omitted in the figure. As for the metal cover 42, the same structure as the first embodiment can be applied.

[0080] At least one reactor 41 is disposed in the metal cover 42 of the auxiliary housing 440. The reactor 41 has a higher heat generation than other electrical components disposed in the main housing 25. The reactor 41 is disposed on the bottom plate 61 of the machine room 30.

[0081] Fig. 22 The structure of a part of the bottom plate 61 is shown. Fig. 22 1 and 2 show the area around the bottom plate 61 where 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 auxiliary container 440 is arranged on the hill-shaped portion 61b. In the present embodiment, the auxiliary container 440 is arranged to bridge the hill-shaped portion 61b on the front side and the hill-shaped portion 61b on the rear side. Moreover, below the auxiliary container 440, the lowermost surface 61a is located between the hill-shaped portion 61b on the front side and the hill-shaped portion 61b on the rear side. Thus, a space S is partially formed below the auxiliary container 40 (see Fig.23 ).

[0083] exist Fig. 22 In FIG. 1 , two arrows are shown along the front-rear direction of the refrigerator 1. Fig.21 In the figure, Z1 corresponds to the front direction and Z2 corresponds to the rear direction. A protrusion 366 for fixing the reactor is provided on the hill-shaped portion 61b on the front side (Z1 side). A protrusion 366 for fixing the reactor is provided on the hill-shaped portion 61b on the rear side (Z2 side). The protrusion 366 is formed by forming a cutout in a part of the bottom plate 61 and bending the cutout part.

[0084] When attaching the reactor 41 to the protrusion 61b, the holes formed at the front-rear ends of the rib 41a of the reactor 41 are inserted into the protrusions 366 on the protrusion 61b. Then, the metal spring members 367 are attached to the protrusions 366.

[0085] As described above, by attaching the reactor 41 to the hill-shaped portion 61b, the spring member 367 can absorb the stress from the bottom plate 61. Therefore, it is possible to prevent the stress variation generated from the bottom plate 61 due to the operation of the compressor 31, the impact during the transportation or installation of the refrigerator 1, etc. from being directly transmitted to the reactor 41 side. That is, in this embodiment, the protrusion 366 of the hill-shaped portion 61b and the spring member 367 serve as a stress absorbing mechanism that absorbs the stress variation generated from the bottom plate 61.

[0086] In addition, a reinforcement groove is formed near each protrusion 366. In the present embodiment, a plurality of grooves 468 extending in the left-right direction are formed on the hill-shaped portion 61b on the front side (Z1 side) on the rear side (Z2 side) of the protrusion 366. Similarly, a plurality of grooves 468 extending in the left-right direction are formed on the hill-shaped portion 61b on the rear side (Z2 side) on the front side (Z1 side) of the protrusion 366.

[0087] With this configuration, the reactor 41 is disposed on the hill-shaped portion 61b provided with the groove 468 (see Fig.23). The area on the bottom plate 61 where 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 due to the vibration transmitted from the compressor 31 to the bottom plate 61, the area on the bottom plate 61 where the groove 468 is formed is not easily deformed. Therefore, it is possible to suppress the deformation of each protrusion 366 and configure the reactor 41 in a more stable state. In addition, the groove 468 is not limited to the left-right direction, and can also be formed to extend in the Z1-Z2 direction.

[0088] Furthermore, by arranging the reactor 41 on the hill-shaped portion 61b having the above-described structure, a space S is provided below the reactor 41 (see Fig.23 ). Thus, the magnetic coupling between the reactor 41 and the bottom plate 61 can be reduced, and the generation of eddy current in the reactor 41 can be suppressed. In addition, as long as the above-mentioned space is formed, the lowermost surface may not be between the hill-shaped portions 61b.

[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 auxiliary housing 440 in this embodiment, the reactor 41 can be fixed to the bottom plate 61 by slightly changing the bottom plate 61 by utilizing the lowermost surface 61a.

[0090] (Summarize) A refrigerator (e.g., refrigerator 1) according to one aspect of the present invention includes: an insulating box (e.g., insulating box 50); a machine room (e.g., machine room 30) disposed below the insulating box; a bottom plate (e.g., bottom plate 61) forming the bottom surface of the machine room; a compressor (e.g., compressor 31) disposed on the bottom plate; and a power supply unit (e.g., power supply unit 20) disposed in the machine room. The power supply unit has main electrical components (e.g., main wiring substrate 21, AC / DC converter circuit 22, etc.) and high heat generation electrical components (e.g., reactor 41, etc.) having a higher heat generation than the main electrical components. The high heat generation electrical components are disposed on the bottom plate.

[0091] In the refrigerator (for example, refrigerator 1) of one aspect of the present invention, the bottom plate (for example, bottom plate 61) may have a lowermost surface (for example, lowermost surface 61a) and a hill-shaped portion (for example, hill-shaped portion 61b, 261b) formed by raising the lowermost surface, and the high heat-generating electrical components (for example, reactor 41, etc.) may be arranged on the hill-shaped portion.

[0092] In the refrigerator (e.g., refrigerator 1) of one aspect of the present invention, the high-heat-generating electrical components (e.g., reactor 41, etc.) may be arranged on a resin component (e.g., resin component 43), and the resin component is arranged on the bottom plate (e.g., bottom plate 61).

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

[0094] In the refrigerator of one aspect of the present invention (for example, refrigerator 1), a stress absorption mechanism (for example, a combination of the front protrusion 75 of the resin component 43 and the engaging portion 66 of the bottom plate 61, the elastic component 143, the hill-shaped portion 261b, the protrusion 366 and the spring component 367, etc.) may be provided on the configuration surface of the high-heat-generating electrical component (for example, the reactor 41, etc.), and the stress absorption mechanism is used to absorb stress changes generated from the bottom plate (for example, the bottom plate 61).

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

[0096] The embodiments disclosed herein are illustrative and non-restrictive in all aspects. The scope of the present invention is not indicated by the description, but by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims. In addition, the configurations obtained by combining the configurations of the different embodiments described in this specification are also included in the scope of the present invention.

Claims

1. A refrigerator, characterized in that: It has: Insulated box; A machine room, which is arranged below the heat-insulating box body; a bottom plate forming the bottom surface of the machinery room; A compressor, which is arranged on the base plate; as well as A power supply unit is arranged in the machine room, The power supply unit has: Main electrical components; as well as High heat generation electric components, whose heat generation is higher than that of the main electric components, The high heat generating electrical components are arranged on the bottom plate.

2. The refrigerator according to claim 1, characterized in that: 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.

3. The refrigerator according to claim 1, characterized in that: The high heat generating electrical components are arranged on a resin component, and the resin component is provided on the bottom plate.

4. The refrigerator according to claim 1, characterized in that: A space is provided below the high heat generating electrical components.

5. The refrigerator according to claim 1, characterized in that: A stress absorbing mechanism is provided on the arrangement surface of the high heat generating electrical component, and the stress absorbing mechanism absorbs stress fluctuation generated from the bottom plate.

6. The refrigerator according to any one of claims 1 to 5, characterized in that: The refrigerator further includes a conductive shell, and the shell covers the high heat generating electrical components.

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