Cooling storage

Abstract

To provide a cooling storage capable of preventing a filling failure of a foamed heat insulating material.SOLUTION: A cooling storage 1 includes: a housing 52 having a cooling chamber; a back plate 51c facing a back side 52a of the housing 52; a foamed heat insulating material 53 filled between the housing 52 and the back plate 51c; and a plurality of wires 20 arranged to extend in a longitudinal direction between the housing 52 and the back plate 51c. The plurality of wires 20 include a first wire group 30 of the bundled wires and a second wire group 40 of the bundled wires. The first wire group 30 and the second wire group 40 are disposed to be separated from each other in a width direction W by a first bundling portion 31 and a second bundling portion 41 provided side by side along the width direction W.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a refrigerator.

Background Art

[0002] For example, Patent Document 1 aims to prevent poor filling of urethane heat insulating material in a harness assembly buried in the urethane heat insulating material of a refrigerating and freezing refrigerator (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As described above, poor filling of the foamed heat insulating material may occur due to the harness disposed in the foamed heat insulating material of the refrigerator. As a result, the heat insulating performance of the refrigerator may deteriorate.

[0005] One object of the present disclosure is to provide a refrigerator that can less likely cause poor filling of the foamed heat insulating material.

Means for Solving the Problems

[0006] A refrigerator according to an aspect of the present disclosure includes a housing having a cooling chamber, a rear plate facing the rear surface of the housing, a foamed heat insulating material filled between the housing and the rear plate, and a plurality of wirings arranged to extend vertically between the housing and the rear plate. The plurality of wirings include a wiring group including a first wiring group and a second wiring group that are each bundled, and have a first bundling portion that bundles the first wiring group and a second bundling portion that bundles the second wiring group. The first bundling portion and the second bundling portion are provided so as to be arranged side by side along the width direction, and the first wiring group and the second wiring group are arranged spaced apart in the width direction by the first bundling portion and the second bundling portion.

Advantages of the Invention

[0007] According to an aspect of the present disclosure, it is possible to provide a refrigerator that is less likely to cause filling defects in the foamed heat insulating material.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure 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 descriptions thereof will not be repeated.

[0010] (Overall configuration of the refrigerator) First, the overall configuration of the refrigerator 1 according to the present embodiment will be described. FIG. 1 is a side cross-sectional view showing the overall configuration of the refrigerator 1 according to the present embodiment. FIG. 2 shows the appearance of the refrigerator 1 viewed obliquely from the rear side. FIG. 2 shows a state in which a heat insulating material is being injected into the heat insulating box body 50.

[0011] The refrigerator 1 includes a heat insulating box body 50. The "heat insulating box body" refers to a box body having a wall portion containing a foam heat insulating material. Examples of the foam heat insulating material include rigid polyurethane foam (also referred to as rigid polyurethane foam). Rigid polyurethane foam is a uniform foam resin body obtained by mixing two main raw materials with a catalyst, a foaming agent, a foam forming agent, etc., and causing a foaming reaction and a resinification reaction to occur simultaneously.

[0012] The heat insulating box body 50 includes an outer box 51, a housing 52, a foam heat insulating material 53, and the like. The outer box 51 forms the outer peripheral surface of the heat insulating box body 50. The housing 52 forms the inner peripheral surface of the heat insulating box body 50. The housing 52 has a cooling chamber 10. The foam heat insulating material 53 is filled between the housing 52 and the outer box 51 (for example, the rear plate 51c).

[0013] The cooling chamber 10 is a room for cooling articles. The cooling chamber 10 is open toward the front. In the present embodiment, the housing 52 has a plurality of cooling chambers (for example, a refrigerating chamber 11, a vegetable chamber 12, a freezing chamber 13, etc.). Doors (for example, a refrigerating chamber door 11a, a vegetable chamber door 12a, and a freezing chamber door 13a) are provided at the opening in front of the cooling chamber 10.

[0014] In the present embodiment, the surface where the door is provided is referred to as the front or the front face of the refrigerator. And, based on the position that exists when the refrigerator 1 is installed in the normal state with the front face as a reference, each face of the refrigerator 1 is defined as the upper face, the side faces, the rear face, and the bottom face. Also, in the state where the refrigerator 1 is placed on the installation surface, the vertical direction of the refrigerator 1 is referred to as the vertical direction of the refrigerator 1 (or the heat insulation box body 50, etc.). Further, in the state where the refrigerator 1 is placed on the installation surface, the front-rear direction when the refrigerator 1 is viewed from the front is referred to as the front-rear direction of the refrigerator 1 (or the heat insulation box body 50, etc.).

[0015] Inside the refrigerator 1, a refrigeration cycle is provided. The refrigeration cycle is configured by connecting a compressor 61, a condenser (not shown), an expander (not shown), and a cooler 72 via a refrigerant pipe (refrigerant flow path) through which the refrigerant flows.

[0016] Also, a control unit is provided inside the refrigerator 1. This control unit controls the operation of the refrigeration cycle. That is, by driving the compressor 61 by the control unit, the operation of the refrigeration cycle is started, and the refrigerant flows through the cycle.

[0017] In this way, while the refrigerant circulates and the refrigeration cycle operates, cold air is generated by the air flow that has exchanged heat with the cooler 72. In the present embodiment, the control unit is realized as a control unit 81 or the like.

[0018] As shown in FIG. 1, the cooler 72 is disposed in a rear space 75 provided on the rear side of the refrigerator 1. The rear space 75 is disposed, for example, between a storage space such as the vegetable compartment 12 and the heat insulation box body 50. Inside the rear space 75, in addition to the cooler 72, a cooling fan 73 is provided. The cooling fan 73 is provided to circulate air between the rear space 75 and each storage space.

[0019] As shown in FIG. 1, the compressor 61 is disposed in a machine room 60 provided on the back side of the bottom of the refrigerator 1. Further, a control unit 81 is disposed in the machine room 60. The control unit 81 is connected to each component disposed outside the heat insulation box body 50 such as the compressor 61. Further, the control unit 81 is also connected to each component (cooler 72, cooling fan 73, various switches, etc.) disposed inside the heat insulation box body 50. The control unit 81 is composed of a control board and controls each component.

[0020] And, a plurality of wirings 20 are further disposed inside the heat insulation box body 50. The wirings 20 are respectively connected between the control unit 81 and each component. At least a part of the plurality of wirings 20 is disposed so as to extend vertically between the housing 52 and the back plate 51c. Such a vertically extending wiring 20 is disposed so as to be embedded in the foamed heat insulating material 53.

[0021] (Configuration of the back portion of the outer box and the heat insulation box body) The outer box 51 has an upper surface plate 51a, side surface plates 51b, a back plate 51c, a bottom surface plate 50d, etc. (see FIG. 2). The upper surface plate 51a forms the upper surface portion of the heat insulation box body 50. The side surface plates 51b respectively form the side surface portions on both the left and right sides of the heat insulation box body 50. The back plate 51c forms the back portion of the heat insulation box body 50.

[0022] The back plate 51c faces the back portion of the housing 52. The side end portion of the back plate 51c has an inclined portion 55 that extends obliquely forward toward the outside (see FIG. 5). A foamed heat insulating material 53 is filled between the back plate 51c and the back surface 52a of the housing 52.

[0023] The back plate 51c is provided with at least one injection port 58 for injecting the material of the foam heat insulating material 53. In the present embodiment, a plurality of injection ports 58 are provided, for example, at both side end portions on the left and right sides of the back plate 51c. Specifically, two injection ports 58a are provided at the inclined portion 55 at the left end portion of the back plate 51c, and two injection ports 58b are provided at the inclined portion 55 at the right end portion, respectively.

[0024] (Method for manufacturing a heat insulating box body) The heat insulating box body 50 having the above-described configuration is manufactured, for example, as follows. First, a plurality of wirings 20 are fixed and attached to predetermined positions on the back surface 52a (the surface opposite to the surface on the cooling chamber side) of the housing 52 using an adhesive tape 25 or the like. Then, each plate of the outer box 51 is joined and fixed so as to cover the back surface of the housing 52, thereby forming the outer shape of the heat insulating box body 50.

[0025] Subsequently, a liquid foam heat insulating material is injected between the outer box 51 and the housing 52. Specifically, an injection nozzle 91 of an injection device for the heat insulating material is inserted into each injection port 58 of the back plate 51c (see FIG. 2). Then, the heat insulating material is discharged from the injection nozzle 91 into the heat insulating box body 50. The discharged heat insulating material foams in the space between the outer box 51 and the housing 52 and then cures. As a result, the inside of the heat insulating box body 50 is filled with the foam heat insulating material.

[0026] The foam heat insulating material 53 filled inside adheres each member (for example, the housing 52, the upper surface plate 51a, the side surface plate 51b, the back plate 51c, and the bottom plate 50d, etc.) constituting the exterior body of the heat insulating box body 50 to each other. Further, the wiring 20 is in a state of being embedded inside the foam heat insulating material (rigid foam urethane) 53.

[0027] (Regarding the configuration of the wiring on the back surface portion of the heat insulating box body) Next, a more detailed configuration of the wiring 20 on the back surface of the heat insulation box body 50 will be described. FIG. 3 is a diagram showing the configuration of the wiring 20 arranged on the back surface of the heat insulation box body 50. FIG. 3 is an image of a part (specifically, the upper left part when viewed from the back) of the heat insulation box body 50 with the back plate 51c removed from the heat insulation box body 50 before filling with the foam heat insulation material, and each member is labeled with a reference numeral.

[0028] FIG. 4 is a schematic diagram for explaining the configuration of the wiring 20 arranged on the back surface of the heat insulation box body 50. FIG. 5 is a diagram showing the cross-sectional configuration of the heat insulation box body 50 at the position marked with the V-V line shown in FIG. 4. FIG. 6 is a schematic diagram showing the cross-sectional configuration of the first wiring group 30 and the second wiring group 40 arranged on the back surface of the heat insulation box body 50. Hereinafter, the vertical direction (also referred to as the longitudinal direction) of the heat insulation box body 50 is denoted as H, and the width direction (also referred to as the lateral direction) of the heat insulation box body 50 is denoted as W (see FIG. 4).

[0029] In the cooler 1, for example, a plurality of wirings 20 are provided to connect between the control unit 81 and each component respectively. Each wiring 20 has, for example, a core material having conductivity and a coating material formed of an insulating resin composition covering the core material.

[0030] On the back surface of the heat insulation box body 50, a plurality of wirings 20 extending in the vertical direction H are arranged. A part of the plurality of wirings 20 is arranged on the back surface of the heat insulation box body 50 as a wiring group in a state where a plurality of them are bundled. This wiring group includes a first wiring group 30 and a second wiring group 40. The first wiring group 30 is fixed to the back surface 52a of the housing 52 by an adhesive tape 25. Similarly, the second wiring group 40 is fixed to the back surface 52a of the housing 52 by an adhesive tape 25.

[0031] As shown in FIG. 6, the cross-sectional area of the first wiring group 30 is larger than that of the second wiring group 40. Here, the fact that the cross-sectional area of the first wiring group 30 is larger than that of the second wiring group 40 means, for example, that the total value of the cross-sectional areas of the wirings 20 constituting the first wiring group 30 is larger than the total value of the cross-sectional areas of the wirings 20 constituting the second wiring group 40. Alternatively, it means that the number of the wirings 20 constituting the first wiring group 30 is larger than the number of the wirings 20 constituting the second wiring group 40. Or, it means that the area of a virtual circle obtained by connecting the outer periphery of the cross-section of the aggregate portion of the wirings 20 (for example, the area of the circle (shown by a broken line) having a diameter L1 shown in FIG. 7) is larger for the first wiring group 30 than for the second wiring group 40.

[0032] Note that the cross-sectional areas of the wirings 20 constituting the first wiring group 30 may all be the same, or may be different individually. Similarly, the cross-sectional areas of the wirings 20 constituting the second wiring group 40 may all be the same, or may be different individually.

[0033] In one example, the first wiring group 30 with a larger cross-sectional area is composed of high-voltage wirings 20 (high-voltage system wirings), and the second wiring group 40 with a smaller cross-sectional area is composed of low-voltage wirings 20 (low-voltage system wirings). The high-voltage system wiring is a wiring for supplying electricity at a high voltage (for example, an alternating voltage of 100 V or more). The low-voltage system wiring is a wiring for supplying electricity at a low voltage (for example, a direct-current voltage of about 10 to 20 V).

[0034] The first wiring group 30 is bundled by a first bundling portion 31. The second wiring group 40 is bundled by a second bundling portion 41. The first bundling portion 31 and the second bundling portion 41 are formed of an insulating material having elasticity such as sponge or rubber, for example. The first bundling portion 31 and the second bundling portion 41 are formed, for example, by winding a thin-plate-shaped sponge having a certain thickness (for example, a thickness of about 1 to 5 cm) around the bundle of the wirings 20.

[0035] The thicknesses of the first bundling part 31 and the second bundling part 41 can be set as follows, for example. FIG. 7 shows the cross-sectional configuration of each wiring group 30 or 40 arranged in the heat insulation box body 50.

[0036] In FIG. 7, in each wiring group 30 or 40, the maximum diameter of the cross-section of the aggregate part of the wirings 20 is defined as L1, and the thickness of the bundling part 31 or 41 is defined as L2. In this case, it is preferable that L1≤L2. Thereby, the first wiring group 30 and the second wiring group 40 can be arranged to be separated from each other in the width direction W with a certain distance therebetween.

[0037] As shown in FIGS. 3 and 4, the first bundling part 31 and the second bundling part 41 are provided so as to be arranged along the width direction W orthogonal to the longitudinal direction H in which the wirings 20 extend. Here, the first bundling part 31 and the second bundling part 41 being provided so as to be arranged along the width direction W means that at least a part of the first bundling part 31 and the second bundling part 41 are provided so as to overlap in a side view. That is, as shown in FIG. 4, the first bundling part 31 and the second bundling part 41 may be arranged in a state where their positions in the longitudinal direction H are slightly offset.

[0038] Due to the first bundling part 31 and the second bundling part 41 arranged as described above, the first wiring group 30 and the second wiring group 40 are arranged to be separated from each other in the width direction W.

[0039] If the first wiring group 30 and the second wiring group 40 each extending in the longitudinal direction are arranged adjacent to each other in the width direction without bundling parts, for example, when the foamed heat insulation material is injected from the injection port 58, each wiring group may move together with the heat insulation material flowing in the heat insulation box body 50, and the first wiring group 30 and the second wiring group 40 may become an integral bundle.

[0040] In the present embodiment, the first bundling portion 31 and the second bundling portion 41 are arranged such that the first wiring group 30 and the second wiring group 40 are separated from each other in the width direction W, thereby avoiding the first wiring group 30 and the second wiring group 40 from being integrated into a bundled shape. As a result, it is possible to reduce the possibility that the foam heat insulating material becomes poorly filled due to the influence of the wiring arranged in the heat insulating box body 50.

[0041] Subsequently, the positional relationship between the injection port 58 provided in the rear plate 51c and each wiring group will be described with reference to FIGS. 3 to 5. In FIGS. 3 and 4, the injection port 58 provided in the rear plate 51c is indicated by a broken line. In FIG. 4, among the plurality of injection ports 58 provided in the rear plate 51c, the injection port 58 provided on the left side when viewed from the rear side is defined as the injection port 58a, and the injection port 58 provided on the right side when viewed from the rear side is defined as the injection port 58b.

[0042] First, as shown in FIG. 4, a configuration will be described by taking as an example the case where the first wiring group 30 and the second wiring group 40 are arranged closer to the left side than the center in the width direction W when the heat insulating box body 50 is viewed from the rear side. In the case of such a configuration, the first wiring group 30 having a larger cross-sectional area is arranged closer to the injection port 58a than the second wiring group 40 having a smaller cross-sectional area.

[0043] On the other hand, in the case of a configuration where the first wiring group 30 and the second wiring group 40 are arranged closer to the right side than the center in the width direction W when the heat insulating box body 50 is viewed from the rear side, the first wiring group 30 having a larger cross-sectional area is arranged closer to the injection port 58b than the second wiring group 40 having a smaller cross-sectional area.

[0044] Thus, when a plurality of injection ports 58 are provided in the rear plate 51c, the arrangement positions of the first wiring group 30 and the second wiring group 40 are determined in consideration of the distance between the injection port 58 existing closer to the arrangement positions of the first wiring group 30 and the second wiring group 40 and the first wiring group 30 or the second wiring group 40.

[0045] The liquid foam heat insulating material injected into the heat insulating box body 50 from the injection port 58 gradually hardens while expanding inside the heat insulating box body 50. That is, at a position closer to the injection port 58, the foam heat insulating material has a high temperature, low viscosity, and relatively high fluidity. Then, as time passes, the viscosity of the foam heat insulating material increases, and finally, it becomes a hardened foam heat insulating material.

[0046] According to the above configuration, since the first wiring group 30 with a larger cross-sectional area is arranged near the injection port 58, a foam heat insulating material in a state of higher fluidity can flow into the periphery of the first wiring group 30. When the foam heat insulating material flows into the periphery of the second wiring group 40 with a smaller cross-sectional area, its fluidity has slightly decreased, but since the cross-sectional area of the wiring group is relatively small, the possibility of becoming a barrier to the flow of the foam heat insulating material can be reduced. Therefore, the occurrence of filling defects of the foam heat insulating material in the heat insulating box body 50 can be further suppressed.

[0047] As shown in FIG. 5, the injection port 58 is provided in the inclined portion 55 of the rear plate 51c. And the first wiring group 30 with a larger cross-sectional area is located outside in the width direction W behind (the back side) of the housing 52 than the second wiring group 40 with a smaller cross-sectional area. Note that the entire opening of the injection port 58 may be provided in the inclined portion 55, or at least a part of the opening may be provided in the inclined portion 55.

[0048] According to the above configuration, when the injection nozzle 91 is inserted into the injection port 58 to discharge the foam heat insulating material, it is possible to avoid the foam heat insulating material with a faster flow rate directly hitting the second wiring group 40 with a smaller cross-sectional area. Therefore, it is possible to suppress the displacement of each wiring group by the foam heat insulating material flowing in the heat insulating box body 50.

[0049] As described above, the refrigerator 1 according to the present embodiment includes a housing 52 having a cooling chamber, a rear plate 51c facing the rear surface 52a of the housing 52, a foamed heat insulating material 53 filled between the housing 52 and the rear plate 51c, and a plurality of wirings 20 arranged to extend in the vertical direction H between the housing 52 and the rear plate 51c. The plurality of wirings 20 include a wiring group including a first wiring group 30 and a second wiring group 40 that are each bundled. The first wiring group 30 and the second wiring group 40 are spaced apart in the width direction W by a first bundling portion 31 and a second bundling portion 41 provided so as to be arranged along the width direction W orthogonal to the vertical direction H.

[0050] According to the above configuration, when the foamed heat insulating material injected from the injection port 58 flows while expanding inside the heat insulating box body 50, for example, each wiring group moves under the influence of the expansion force of the heat insulating material, and it is possible to avoid the first wiring group 30 and the second wiring group 40 from becoming an integral bundle. Therefore, it is possible to reduce the possibility that the heat insulating material does not sufficiently spread around the wiring due to the influence of the wiring arranged in the heat insulating box body 50 and the foamed heat insulating material becomes poorly filled.

[0051] In the above-described embodiment, a configuration in which the first wiring group 30 having a larger cross-sectional area is arranged closer to the injection port 58 than the second wiring group 40 having a smaller cross-sectional area has been described as an example. However, the configuration is not limited to this.

[0052] In another embodiment, as shown in FIG. 7, the second wiring group 40 having a smaller cross-sectional area may be arranged closer to the injection port 58 than the first wiring group 30 having a larger cross-sectional area. Also in such a configuration, the first wiring group 30 and the second wiring group 40 are spaced apart in the width direction W by the first bundling portion 31 provided in the first wiring group 30 and the second bundling portion 41 provided in the second wiring group 40. Thereby, it is possible to avoid the first wiring group 30 and the second wiring group 40 from becoming an integral bundle, and it is possible to reduce the possibility that the foamed heat insulating material 53 in the heat insulating box body 50 becomes poorly filled.

[0053] The embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present disclosure is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims be included. Also, configurations obtained by combining the configurations of different embodiments described in this specification with each other are also included in the scope of the present disclosure.

Explanation of Reference Numerals

[0054] 1: Refrigerator 10: Cooling chamber 20: Wiring 30: First wiring group 31: First bundling part 40: Second wiring group 41: Second bundling part 50: Heat insulation box body 51c: Rear plate 52: Housing 52a: Rear surface of the housing 53: Foamed heat insulation material 55: Inclined part 58: Injection port H: Vertical direction W: Width direction

Claims

1. A housing having a cooling chamber, A rear plate facing the rear surface of the housing, A foamed heat insulating material filled between the housing and the rear plate, A plurality of wirings arranged to extend in the vertical direction between the housing and the rear plate Comprising, The plurality of wirings each include a wiring group including a first wiring group and a second wiring group bundled together, A first bundling portion for bundling the first wiring group and a second bundling portion for bundling the second wiring group, The first bundling portion and the second bundling portion are provided to be arranged side by side along the width direction, By the first bundling portion and the second bundling portion, the first wiring group and the second wiring group are arranged spaced apart in the width direction, A refrigerator.

2. The rear plate is provided with an injection port for injecting the material of the foamed heat insulating material, The cross-sectional area of the first wiring group is larger than the cross-sectional area of the second wiring group, The first wiring group is arranged closer to the injection port than the second wiring group, The refrigerator according to Claim 1.

3. The side end portion of the rear plate has an inclined portion extending obliquely forward toward the outside, At least a part of the injection port is provided in the inclined portion, The first wiring group is located outside in the width direction behind the housing compared to the second wiring group, The refrigerator according to Claim 2.

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