JP7421924B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator equipped with a heat insulating box.

Generally, a refrigerator is provided with an insulating box covering the outer periphery of a storage space in order to insulate the refrigerator from the surroundings. The heat insulating box body is composed of an outer box, an inner box, and a heat insulating material filled between these. As the heat insulating material, for example, a foamable heat insulating material such as a hard foamed urethane heat insulating material is used.

In addition to the heat insulating material, inside the heat insulating box, there are also electrical wiring that connects various electronic components such as a control board, a switch, and a motor disposed inside the refrigerator. Such electrical wiring exists so as to be embedded in the heat insulating material.

For example, Patent Document 1 discloses a refrigerator in which electrical lead wires 22 extending from an electrical unit 21 arranged on a top surface 20 of the refrigerator main body are wired along the back surface of an inner box 3 of the refrigerator main body. In this refrigerator, the electrical lead wire 22 is fixed to the back surface of the inner box via a plurality of spacer members 23 made of a heat insulating material, and a foam insulation material is used between the electrical lead wire 22 between the spacer members 23 and the inner box. 4 is filled and foamed to intervene.

Japanese Patent Application Publication No. 2016-44907

In conventional refrigerators, such as the refrigerator in Patent Document 1, the wiring passing through the heat insulating box is arranged on the inner box side.

By the way, when injecting the foamed heat insulating material into the heat insulating box, the liquid heat insulating material is injected through an opening (filling port) formed in the outer box. The liquid foam heat insulating material injected into the heat insulating box first starts foaming from below and expands upward. For example, when injecting liquid heat insulating material from the back of the heat insulating box with its opening facing downward, the back of the heat insulating box is filled with foam last. At this time, if a wire is run between the outer box and the inner box on the back of the heat insulating box, the wire may hinder the formation of the foamed heat insulating material when the heat insulating material is foamed. In particular, if the wiring extends between the outer box and the inner box, it is likely to become an obstacle during foaming. As a result, there is a possibility that there are voids or the like that are not filled with the foamed heat insulating material in the heat insulating box, and the heat insulating performance may deteriorate. That is, the fluidity of the heat insulating material is inhibited by the wiring.

Therefore, an object of the present invention is to provide a refrigerator that can further improve the heat insulation performance of the heat insulation box.

A refrigerator according to one aspect of the present invention includes an insulating box body having an outer box and an inner box, a vacuum insulating material disposed on the outer box side in the insulating box body, and upper and lower parts of the insulating box body. an electrical unit disposed in one of the above, a machine room disposed in the other of the upper and lower parts of the insulating box and housing electric components, and an electrical unit in the insulating box. and at least one wiring connecting the electric component and the electric component. In this refrigerator, the wiring is arranged on the outer periphery of the vacuum insulation material in the outer box.

According to the refrigerator according to one aspect of the present invention, the wiring connecting the electrical unit and the electric parts arranged in the machine room is arranged on the outer periphery of the vacuum insulation material in the outer box, so that the insulation box body The generation of voids in the heat insulating layer can be suppressed, and the heat insulating performance of the heat insulating box can be further improved.

FIG. 1 is a side sectional view showing the internal configuration of a refrigerator according to an embodiment of the present invention. FIG. 2 is a perspective view showing the external appearance of the refrigerator shown in FIG. 1 on the back side. FIG. 2 is a schematic cross-sectional view showing the internal configuration of the heat insulating box of the refrigerator shown in FIG. 1. FIG. FIG. 2 is a plan view showing the configuration of the back portion inside the heat insulating box of the refrigerator according to the first embodiment. In this figure, illustration of wiring is omitted. FIG. 2 is a plan view showing the configuration of the back portion inside the heat insulating box of the refrigerator according to the first embodiment. FIG. 2 is a schematic cross-sectional view showing the internal configuration of the heat insulating box of the refrigerator shown in FIG. 1. FIG. FIG. 2 is a schematic cross-sectional view showing the configuration of wiring arranged inside the heat insulating box of the refrigerator shown in FIG. 1. FIG. It is a top view which shows the structure of the back part inside the heat insulation box of the refrigerator concerning 2nd Embodiment. It is a cross-sectional schematic diagram which shows the internal structure of the heat insulation box of the refrigerator concerning 2nd Embodiment. It is a cross-sectional schematic diagram which shows the internal structure of the heat insulation box of the refrigerator concerning 2nd Embodiment. It is a cross-sectional schematic diagram which shows the internal structure of the heat insulation box of the refrigerator concerning 3rd Embodiment.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. In the following description, the same parts are given the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

<First embodiment>
(Overall configuration of refrigerator)
First, the overall configuration of the refrigerator 1 according to the present embodiment will be explained. FIG. 1 is a side sectional view showing the overall configuration of a refrigerator 1 according to the present embodiment. FIG. 2 shows the configuration of the back side of the refrigerator 1.

As shown in FIG. 1, the refrigerator 1 includes a plurality of storage compartments such as a refrigerator compartment 11, an ice making compartment 12, a small freezer compartment 13, and a freezing compartment 14. The refrigerator compartment 11 is provided with a refrigerator compartment door 11a. Other storage rooms also have doors at their openings.

In this embodiment, the surface on which the door is provided is the front surface (front surface) of the refrigerator. Then, each surface of the refrigerator 1 is defined as a top surface, a side surface, a back surface, and a bottom surface based on the position that exists when the refrigerator 1 is installed in a normal state with the front surface as a reference.

The refrigerator 1 is provided with a heat insulating box 50 as a heat insulating structure for insulating each storage space from the surroundings. The heat insulating box 50 is provided so as to cover the outer periphery of the refrigerator 1. The heat insulating box body 50 mainly includes an outer box 51, an inner box 52, a heat insulating layer (foamed heat insulating material) 53, a vacuum heat insulating material (VIP) 54, etc. (see FIG. 3).

In this specification, the outer surfaces of the heat insulating box 50 are respectively referred to as a top surface portion 51a, a bottom surface portion 51b, a back surface portion 51c, and a side surface portion 51d, in conjunction with the names of each surface of the refrigerator 1.

A refrigeration cycle is provided inside the refrigerator 1. The refrigeration cycle includes a cooler (evaporator) (not shown), a compressor 31, a condenser 23, and an expander (not shown) as main components. These constituent members are connected via refrigerant pipes (refrigerant channels) through which refrigerant flows. Among the refrigerant pipes, a flow path from the condenser 23 to the expander constitutes a heat radiation pipe 25 and a dew prevention pipe (not shown). The expander is composed of, for example, a capillary tube.

The cooler is arranged in a cooling chamber provided on the back side of the refrigerator 1. Further, the compressor 31, the condenser 23, and the expander are arranged in a machine room 30 provided on the bottom rear side of the refrigerator 1.

The heat radiation pipe 25 extends to the back surface 51c of the heat insulating box 50. Details of how to arrange the heat dissipation pipe 25 will be described later. The refrigerant warmed by the compressor 31 flows through the heat radiation pipe 25 and the dew prevention pipe. Therefore, the relatively high temperature refrigerant flows through the heat radiation pipe 25, thereby radiating heat and being cooled. Therefore, the heat radiation pipe 25 can also be used to suppress condensation on the back surface portion 51c of the heat insulating box 50. The dew-proof pipe is arranged, for example, at the frontage of the heat insulating box 50, and suppresses dew condensation at the frontage.

Further, inside the refrigerator 1, a control section is provided. This control section controls the operation of the refrigeration cycle. That is, when the control unit drives the compressor 31, the operation of the refrigeration cycle is started, and the refrigerant flows within the cycle. The high-temperature, high-pressure refrigerant compressed by the compressor 31 is condensed in the condenser 23 while dissipating heat. Next, the high temperature refrigerant is depressurized in an expander and sent to a cooler serving as an evaporator. The refrigerant flowing into the cooler expands and becomes low temperature, exchanges heat with the cold air flowing in the cooling chamber, evaporates while absorbing heat, becomes a low-temperature gas refrigerant, and is sent to the compressor 31. In this way, the refrigerant circulates to operate the refrigeration cycle, and the airflow that exchanges heat with the cooler generates cold air.

In this embodiment, the control unit is realized as an external electrical unit 35, an internal electrical unit (not shown), and the like.

The external electrical equipment unit 35 is arranged on the upper surface portion 51a of the heat insulating box 50. The external electrical unit 35 is composed of a control board and controls each component. The external electrical unit 35 is connected to each component such as the compressor 31 disposed outside the heat insulating box 50 by wiring (also called a harness) 40 or the like. Further, the external electrical unit 35 is connected to the internal electrical unit by wiring (not shown).

The internal electrical unit is arranged, for example, on the back side of the refrigerator compartment 11. That is, the internal electrical unit is arranged on the inner box 52 side of the heat insulating box 50. The internal electrical equipment unit is, for example, each component (cooling fan, various switches, sensors, etc.) disposed inside the heat insulating box 50, or a circuit board on which these components are integrated.

Various types of wiring are arranged inside the heat insulating box 50. Various types of wiring are connected to electrical components such as the compressor 31, an external electrical unit 35, an internal electrical unit, a power supply unit (not shown), and the like.

In this embodiment, among these various types of wiring, the wiring extending from the top surface portion 51a to the bottom surface portion 51b of the heat insulating box 50 is collectively referred to as wiring 40. The wiring 40 is embedded within the heat insulating layer 53 of the heat insulating box 50. The wiring 40 connects the external electrical unit 35 and each component. Specifically, the wiring 40 electrically connects the external electrical unit 35 and each electric component in the machine room 30 (for example, the compressor 31, etc.). The wiring 40 is also called machine room wiring. Note that, as will be described later, the wiring 40 includes, for example, a first wiring 45 that is a low-voltage wiring and a second wiring 46 that is a high-voltage wiring.

As will be described later, the wiring 40 is disposed inside the heat insulating box 50 so as to extend along the back surface 51c (ie, on the outer box 51 side) of the heat insulating box 50. Details of the method of arranging the wiring 40 will be described later.

(Explanation of insulation box)
Next, a more specific configuration of the heat insulating box 50 will be described with reference to FIGS. 1 to 3 and the like. FIG. 3 shows the internal configuration of a portion of the heat insulating box 50. As shown in FIG. This figure is a diagram showing a cross-sectional configuration at a position corresponding to the BB line portion (near the injection port 58) of the outer box 51 of the heat insulating box 50 shown in FIG.

The outer box 51 forms the outer peripheral surface of the heat insulating box body 50. The outer box 51 also partially forms the outer shape of the refrigerator 1. The inner box 52 forms the inner peripheral surface of the heat insulating box body 50. Moreover, the inner box 52 partitions each storage space (for example, the refrigerator compartment 11). The inner box 52 is also called a food liner.

A space for arranging the machine room 30 is formed on the back side of the bottom surface of the heat insulating box 50. That is, the machine room 30 is arranged outside the heat insulating box 50. This is because the temperature inside the machine room 30 increases when the compressor 31 and the condenser 23 operate.

The heat insulating layer 53 is mainly composed of foamed heat insulating material. Specifically, the heat insulating layer 53 can be formed of hard urethane foam (also referred to as hard urethane foam). Rigid urethane foam is a uniform resin foam obtained by mixing two main raw materials with a catalyst, a blowing agent, a foaming agent, etc., and causing a foaming reaction and a resin-forming reaction at the same time.

As shown in FIG. 2, the back surface 51c of the outer box 51 is provided with an injection port 58 for injecting a hard urethane foam material (insulating material). In this embodiment, two injection ports 58 are provided on the left side of the back surface portion 51c, and two injection ports 58 are provided on the right side of the back surface portion 51c, for a total of four injection ports 58. However, the number of injection ports 58 is not limited to this.

Further, the inside of the heat insulating box 50 includes a vacuum heat insulating material 54 in addition to a heat insulating layer 53 made of a foamed heat insulating material. The vacuum insulation material 54 is formed by covering a core material with microscopic voids such as glass wool or silica powder with an outer cover material (bag-like body, such as a laminate film) having gas barrier properties, and sealing the inside of the outer cover material under reduced pressure. be done. Vacuum heat insulating materials can achieve high heat insulation effects by keeping their internal space at a high vacuum and minimizing the amount of heat transmitted through the gas phase. The vacuum heat insulating material 54 is, for example, a flat member having a rectangular plane.

As shown in FIG. 3 and the like, the vacuum heat insulating material 54 is arranged on the outer box 51 side of the heat insulating box body 50. That is, on the back side of the heat insulating box 50, the vacuum heat insulating material 54 is attached to the inner surface of the back side 51c of the outer box 51. Further, on the side surface of the heat insulating box 50, the vacuum heat insulating material 54 is attached to the inner surface of the side surface 51d of the outer box 51.

Further, as shown in FIG. 3, on the back surface portion 51c of the heat insulating box 50, the wiring 40 and the heat radiation pipe 25 are arranged. The wiring 40 and the heat radiation pipe 25 are arranged along the outer periphery of the vacuum heat insulating material 54. The wiring 40 and the heat radiation pipe 25 are fixed with adhesive tape 62.

(Wiring arrangement method)
Next, a method of arranging the wiring 40 (specifically, the first wiring 45, which is a low-voltage wiring, and the second wiring 46, which is a high-voltage wiring) on the back surface 51c of the heat-insulating box 50 will be explained. . 4 and 5 are plan views showing the configuration of the back surface portion 51c of the outer box 51 that constitutes the heat insulating box body 50. 4 and 5 show the inside of the back surface portion 51c (the side on which the heat insulating layer 53 is formed). Note that FIG. 4 shows a state before the wiring 40 is arranged. FIG. 6 shows the internal configuration of a portion of the heat insulating box 50. As shown in FIG. This figure is a diagram showing a cross-sectional configuration at a position corresponding to the line AA of the outer box 51 of the heat insulating box 50 shown in FIG. 5 (the position where the injection port 58 is formed).

As shown in FIG. 4, one heat dissipation pipe 25 is arranged on the back surface portion 51c of the outer box 51. The heat radiation pipe 25 provided on the back surface portion 51c is arranged so as to surround the outer periphery of the vacuum heat insulating material 54. The end portions on both sides of the heat dissipation pipe 25 protrude toward the machine room 30 from the lower end of the back surface portion 51c.

In addition, in the back surface portion 51c, a cover 59 is provided at the injection port 58 for the heat insulating material so as to cover the opening. At the position where the injection port 58 is formed in the back surface portion 51c, the heat radiation pipe 25 is arranged between the side end of the vacuum heat insulating material 54 and the cover 59 (see FIG. 6).

A wiring exit 36 is provided at the upper end of the back surface 51c of the outer box 51, which serves as an exit for the wiring 40 passing inside the heat insulating box 50. In this embodiment, two wiring exits 36 are provided. The wiring 40 extending from the wiring outlet 36 to the outside of the heat insulating box 50 is connected to wiring or terminals on the external electrical unit 35 side.

Note that a part of the heat dissipation pipe 25 passing above the vacuum heat insulating material 54 is bent so as to approach the wiring outlet 36. A part of the heat dissipation pipe 25 (the part indicated by the broken line in FIG. 4) is covered and fixed with an adhesive tape 61 made of a material with high thermal conductivity such as aluminum. By arranging the heat radiation pipe 25 near the wiring outlet 36 communicating with the outside air, dew condensation near the wiring outlet 36 can be suppressed. Also. Since the adhesive tape 61 has high thermal conductivity, heat generated in the heat radiation pipe 25 is transferred to the adhesive tape 61. Thereby, the effect of suppressing dew condensation at the upper end portion of the back surface portion 51c can be enhanced.

As shown in FIG. 4, the wiring 40 is attached after the heat dissipation pipe 25 is disposed on the back surface 51c of the outer box 51 so as to surround the outer periphery of both left and right sides and the upper side of the vacuum heat insulating material 54. FIG. 5 shows the back side 51c of the outer box 51 with the wiring 40 arranged thereon. As shown in FIG. 5, most of the wiring 40 is arranged along the heat dissipation pipe 25 on the back surface portion 51c.

Here, a configuration example in which the wiring 40 is divided into a first wiring for low voltage (low voltage system wiring) 45 and a second wiring for high voltage (high voltage system wiring) 46 will be described.

As shown in FIG. 5, the wiring 40 passing through the back surface 51c of the outer box 51 within the heat insulating box 50 is composed of two types, a first wiring 45 and a second wiring 46.

The first wiring 45 is wiring used to transmit electrical signals to the external electrical unit 35 and various devices arranged in the machine room 30 (for example, a machine room fan, a refrigerant switching valve, etc.). In other words, the first wiring 45 is a wiring for supplying low voltage (eg, DC voltage of about 10 to 20 V) electricity.

As shown in FIG. 5, one end (upper end) of the first wiring 45 extends from the right wiring outlet 36 to the outside electrical unit 35 side. Further, the other end (lower end) of the first wiring 45 indicated by arrow A is branched and connected to various devices arranged in the machine room 30 (for example, a machine room fan, a refrigerant switching valve, etc.). Connected.

The second wiring 46 electrically connects the external electrical unit 35 and each electric component in the machine room 30 (for example, the compressor 31, etc.). The second wiring 46 is wiring mainly used for driving the main power supply and each electric component such as the compressor 31 and the inverter. In other words, the second wiring 46 is a wiring for supplying high voltage (for example, AC voltage of 100 V or more) electricity.

As shown in FIG. 5, one end (upper end) of the second wiring 46 extends from the left wiring outlet 36 to the external electrical unit 35 side. Further, the other end (lower end) of the second wiring 46 indicated by arrow B is connected to an electric component such as a compressor 31 arranged in the machine room 30.

As described above, in this embodiment, the wiring 40 is divided into the first wiring 45 and the second wiring 46 depending on the type of electrical signal to be transmitted. As shown in FIG. 5, the first wiring 45 and the second wiring 46 are arranged separately on the right side and the left side of the vacuum heat insulating material 54. That is, the first wiring 45, which is a low-voltage wiring, is arranged along one side of the vacuum insulation material 54 (the right side in the example shown in FIG. 5), and is a high-voltage wiring. A certain second wiring 46 is arranged along the other side (the left side in the example shown in FIG. 5) opposite to the one side of the vacuum heat insulating material 54. In this way, the first wiring 45 and the second wiring 46 are arranged on the back surface 51c of the outer box 51 while being spaced apart from each other. Thereby, the generation of noise that may occur between the first wiring 45 and the second wiring 46 can be reduced. Note that the first wiring 45 and the second wiring 46 may be arranged horizontally inverted.

Further, FIG. 7 schematically shows a cross-sectional configuration of the wiring 40. As shown in FIG. 7, the wiring 40 includes a plurality of single wirings 41. The single wire 41 includes a conductive core wire 42 and an insulating covering material 43 covering the core wire 42 . The covering material 43 can be made of, for example, polyvinyl chloride. The wiring 40 is formed by bundling a plurality of such single wirings 41. Further, as shown in FIG. 7, the outer periphery of the wiring 40 may be further covered with an insulating jacket material (insulator) 44. The outer covering material 44 can be formed of the same material as the covering material 43 (eg, polyvinyl chloride, etc.). In this way, the wiring 40 has a bundle formed of a plurality of single wirings 41 inside the insulating jacket material 44.

As described above, the wiring 40 is composed of a plurality of bundle-shaped single wirings 41 and the covering material 44 that covers them, and therefore has a relatively large diameter. By arranging such a relatively large-diameter wiring 40 along the edge of the vacuum insulation material 54, there is a possibility that the wiring 40 will interfere with filling the foam insulation material when forming the foam insulation material. can be reduced.

As shown in FIG. 5, each wiring 40 (first wiring 45 and second wiring 46) is fixed with an adhesive tape 62. In this embodiment, the wiring 40 and the heat radiation pipe 25 are arranged along the outer periphery of the vacuum heat insulating material 54. Therefore, as shown in FIG. 3, the adhesive tape 62 is arranged so that a part thereof rides on the vacuum insulation material 54, and the adhesive tape 62 is used to fix the wiring 40 and the heat dissipation pipe 25 together. There is.

When fixing the wiring 40 with the adhesive tape 62, it is preferable to arrange the wiring 40 so that it fits in the gap between the end of the vacuum heat insulating material 54 and the heat radiation pipe 25, as shown in FIG. This prevents the wiring 40 from climbing onto the plane of the vacuum heat insulating material 54. Therefore, when forming the foam heat insulating material, it is possible to reduce the possibility that the wiring 40 will inhibit the expansion of the foam heat insulating material. Further, when forming the foam insulation material, the foam insulation material injected from the injection port 58 flows in the direction shown by the broken line arrow in FIG. By fixing the wiring 40 with the adhesive tape 62, it is possible to suppress the displacement of the wiring 40 due to the flow of the foamed heat insulating material.

Further, as shown in FIG. 3, the wiring 40 may be arranged so as to ride on the heat dissipation pipe 25. Thereby, the wiring 40 can be warmed by the heat of the heat radiation pipe 25. Thereby, the effect of suppressing dew condensation at locations where the wiring 40 exits to the outside of the heat insulating box 50 such as the wiring exit 36 can be enhanced.

Further, it is preferable that some of the plurality of adhesive tapes 62 be arranged near the injection port 58, like the adhesive tape 62a shown in FIG. FIG. 6 shows a cross-sectional configuration of a location where the adhesive tape 62a is placed near the injection port 58. By arranging the adhesive tape 62a near the injection port 58 rather than at the position where the injection port 58 is formed, it is possible to prevent the opening/closing operation of the cover 59 covering the injection port 58 from being obstructed. As shown in FIG. 6, the cover 59 has a valve-like configuration that opens and closes inside the heat insulating box 50. As shown in FIG.

Moreover, at the formation position of the injection port 58, the injection port 58 and the end of the vacuum heat insulating material 54 are close to each other. Preferably, the wiring 40 is placed in a position where it does not block the opening of the injection port 58. Furthermore, since the flow rate of the foamed heat insulating material tends to be high in the vicinity of the injection port 58, the wiring 40 is likely to be displaced due to the flow of the foamed heat insulating material. Therefore, by arranging the adhesive tape 62a near the injection port 58, the positional shift of the wiring 40 can be suppressed.

(Summary of the first embodiment)
As described above, the refrigerator 1 according to the present embodiment includes the heat insulating box 50, the external electrical unit 35, and the machine room 30. The heat insulating box 50 has an outer box 51 and an inner box 52. Further, a heat insulating layer 53 is formed between the outer box 51 and the inner box 52. The heat insulating layer 53 is made of foamed heat insulating material. Further, a vacuum heat insulating material 54 is provided between the outer box 51 and the inner box 52. The external electrical equipment unit 35 is arranged above the heat insulating box 50 (that is, on the upper surface portion 51a of the outer box 51). The machine room 30 is arranged below the heat insulating box 50 (that is, on the side opposite to the side where the external electrical unit 35 is arranged, specifically, on the bottom surface 51b of the outer box 51), and is Contains parts. Note that the external electrical unit 35 and the compressor 31 may be arranged in upside-down positions relative to the present embodiment.

Furthermore, the refrigerator 1 has at least one wiring 40 that connects the external electrical unit 35 and the electric component within the heat insulating box 50. This wiring 40 is arranged along the outer periphery of a vacuum heat insulating material 54 arranged on the outer box 51 side, and is embedded in the heat insulating layer 53.

According to the above configuration, the wiring 40 connecting the external electrical unit 35 disposed on the top surface 51a of the outer box 51 and the electric components such as the compressor 31 disposed on the bottom surface 51b is connected to the outer box 51. By arranging it on the 51 side, it is possible to reduce the number of wiring lines that may hinder the fluidity of the foamed heat insulating material. Thereby, it is possible to suppress the occurrence of unfilled portions of the heat insulating material that may occur during the process of forming the foamed heat insulating material, and to suppress the generation of voids (gaps) in the heat insulating layer 53.

In particular, regarding the wiring 40 that connects the external electrical unit 35 located at the top of the heat insulating box 50 and electric parts such as the compressor 31 in the machine room 30 located at the bottom of the heat insulating box 50, It is not necessarily necessary to arrange it on the inner box 52 side. Therefore, in this embodiment, the wiring 40 is arranged on the outer box 51 side. In the back surface portion 51c of the heat insulating box 50, the foamed heat insulating material flows and foams in order from the inner box 52 side, and then flows toward the outer box 51 side. Therefore, the possibility that the wiring 40 placed on the outer box 51 side will hinder the fluidity of the foamed insulation material, resulting in an unfilled portion of the insulation material, is lower than the possibility of the wiring 40 placed on the inner box 52 side. It will be quite low. Therefore, by changing the arrangement position of the wiring inside the insulation box 50 according to the purpose of the wiring, it is possible to minimize the decrease in fluidity of the foam insulation material due to the arrangement of the wiring inside the insulation layer 53. Can be done.

Furthermore, in the conventional configuration in which all the wiring is arranged on the inner box 52 side, the wiring 40 is once routed from the outer box 51 side to the inner box 52 side at the upper end of the insulating box 50. It was routed from the inner box 52 side to the outer box 51 side at the lower end. In this configuration, there is at least one location above and below where the wiring straddles the outer box 51 and the inner box 52.

On the other hand, in this embodiment, the wiring 40 does not span the outer box 51 and the inner box 52, and the only wiring connected to the inside of the refrigerator is at one location between the external electrical unit 35 and the inner box 52. It is possible to have a configuration that straddles the two. Since a highly thermally conductive metal such as a copper wire is usually used for the wiring, if the wiring spans the outer box 51 and the inner box 52 in many places, the insulation performance of the insulation box deteriorates. Furthermore, the cold heat inside the refrigerator is transmitted to the part where the wiring 40 exits to the outer box 51, and condensation is likely to occur. On the other hand, in this embodiment, the insulation performance of the insulation box 50 can be maintained by reducing the number of wires spanning the outer box 51 and the inner box 52.

In particular, the wiring 40 (second wiring 46 in the above example) for driving each electric component (for example, the compressor 31, etc.) in the machine room 30 often has a relatively thick core wire because a large current often flows through it. 42 is used. Since the core wire 42 is often made of a good heat conductive material such as copper, heat transfer through the wiring 40 is large. By not disposing this wiring near the inner box 52, it is possible to effectively suppress the deterioration of the heat insulation performance and dew condensation described above.

Further, in the refrigerator 1 according to the present embodiment, the wiring 40 is arranged on the outer periphery of the vacuum heat insulating material 54 arranged on the back surface 51c of the outer box 51. With such a configuration, it is possible to more effectively prevent the wiring from interfering with the flow of the foamed heat insulating material. Further, in this embodiment, since the wiring 40 is arranged using the dead space formed at the end of the thick vacuum insulation material 54, the insulation box 50 due to the arrangement of the wiring 40 is Increase in wall thickness can be suppressed.

<Second embodiment>
Next, a second embodiment of the present invention will be described. In the second embodiment, the arrangement position of the heat radiation pipe is different from the first embodiment. For other configurations, the same configuration as in the first embodiment can be applied. Therefore, in the second embodiment, a description will be given focusing on the configuration different from the first embodiment.

FIG. 8 is a plan view showing the configuration of the back surface portion 51c of the outer box 51 that constitutes the heat insulating box body 50 of the refrigerator 1 according to the second embodiment. As shown in FIG. 8, the wiring 40 and the heat radiation pipe 125 are arranged on the back surface 51c of the heat insulating box 50. 9 and 10 show the internal configuration of a portion of the heat insulating box 50. As shown in FIG. FIG. 9 is a diagram showing a cross-sectional configuration of the outer box 51 of the heat insulating box 50 shown in FIG. 8 at a position corresponding to the line AA (position where the injection port 58 is formed). FIG. 10 is a diagram showing a cross-sectional configuration of the outer box 51 of the heat-insulating box 50 shown in FIG. 8 at a position corresponding to the BB line portion (near the injection port 58).

Similarly to the first embodiment, the wiring 40 is arranged along the outer periphery of the vacuum heat insulating material 54. Note that, similarly to the first embodiment, the wiring 40 is composed of a first wiring for low voltage (low voltage wiring) 45 and a second wiring for high voltage (high voltage wiring) 46. There is. The first wiring 45 is arranged along one side of the vacuum insulation material 54 (in the example shown in FIG. 8, the right side), and the second wiring 46 is arranged along one side of the vacuum insulation material 54. They are arranged along the other side (in the example shown in FIG. 8, the left side) opposite to one side.

The heat radiation pipe 125 extends to the back surface portion 51c of the heat insulating box 50. In this embodiment, the heat dissipation pipe 125 is arranged only in the lower part of the back surface portion 51c.

As shown in FIG. 8, the wiring 40 and the heat radiation pipe 125 are fixed with adhesive tape 62. In this embodiment, the wiring 40 is arranged along the outer periphery of the vacuum heat insulating material 54. Further, in the lower left portion of the vacuum heat insulating material 54 where the heat radiation pipe 125 is arranged, the wiring 40 is arranged along the heat radiation pipe 125.

As shown in FIG. 10, the adhesive tape 62 is arranged so that a portion thereof rides on the vacuum heat insulating material 54. When fixing the wiring 40 with the adhesive tape 62, it is preferable to arrange the wiring 40 so as to fit in a gap between the ends of the vacuum heat insulating material 54. This prevents the wiring 40 from climbing onto the plane of the vacuum heat insulating material 54. Therefore, when forming the foam heat insulating material, it is possible to reduce the possibility that the wiring 40 will obstruct the expansion of the foam heat insulating material. Further, when forming the foamed heat insulating material, the foamed heat insulating material injected from the injection port 58 flows in the direction shown by the broken line arrow in FIG. By fixing the wiring 40 with the adhesive tape 62, it is possible to suppress the displacement of the wiring 40 due to the flow of the foamed heat insulating material.

Further, it is preferable that some of the plurality of adhesive tapes 62 be arranged near the injection port 58, like the adhesive tape 62a shown in FIG. FIG. 10 shows a cross-sectional configuration of a location where the adhesive tape 62a is placed near the injection port 58. By arranging the adhesive tape 62a near the injection port 58 rather than at the position where the injection port 58 is formed, it is possible to prevent the opening/closing operation of the cover 59 covering the injection port 58 from being obstructed.

Moreover, at the formation position of the injection port 58, the injection port 58 and the end of the vacuum heat insulating material 54 are close to each other. Preferably, the wiring 40 is placed in a position where it does not block the opening of the injection port 58. Furthermore, since the flow rate of the foamed heat insulating material tends to be high in the vicinity of the injection port 58, the wiring 40 is likely to be displaced due to the flow of the foamed heat insulating material. Therefore, by arranging the adhesive tape 62a near the injection port 58, the positional shift of the wiring 40 can be suppressed.

<Third embodiment>
Next, a third embodiment of the present invention will be described. In the third embodiment, a configuration example in which the configuration of the vacuum heat insulating material is different from the above embodiment will be described. For other configurations, the same configuration as in the first embodiment can be applied. Therefore, in the third embodiment, a description will be given focusing on the configuration different from the first embodiment.

FIG. 11 shows the internal configuration of a portion of the heat insulating box 50 of the refrigerator 1 according to this embodiment. A vacuum heat insulating material 254 is arranged on the back side of the heat insulating box 50. The vacuum heat insulating material 254 is attached to the inner surface of the back surface portion 51c of the outer box 51. In this embodiment, a vacuum insulation material 254 is provided that is wider than the vacuum insulation material 54 described in the first embodiment. Therefore, the side end portion 254a of the vacuum heat insulating material 254 reaches close to the ridgeline 51e at the boundary between the flat portion and the sloped portion of the back surface portion 151c of the outer box 51.

Further, as shown in FIG. 11, on the back surface portion 51c of the heat insulating box 50, the wiring 40 and the heat radiation pipe 25 are arranged. The wiring 40 and the heat radiation pipe 25 are arranged along the outer periphery of the vacuum heat insulating material 54. The wiring 40 and the heat radiation pipe 25 are fixed with adhesive tape 62.

In this embodiment, the heat radiation pipe 25 is arranged between the wiring 40 and the side end 254a of the vacuum heat insulating material 254. In this way, when the wider vacuum heat insulating material 254 is arranged on the back surface portion 51c, the wiring 40 may be arranged outside the heat dissipation pipe 25.

<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described. In the above-described embodiment, an example has been described in which the wiring 40 is composed of a low-voltage wiring and a high-voltage wiring. However, in one embodiment of the present invention, the wiring does not need to be divided into low voltage wiring and high voltage wiring. In this case, one wiring 40 may be arranged along either the left or right side edge of the vacuum heat insulating material 54.

Note that the wiring 40 may be formed by bundling a plurality of single wirings 41, as described in the first embodiment. In another example, the wiring 40 may be formed of one single wiring 41.

(summary)
A refrigerator (for example, refrigerator 1) according to one aspect of the present invention includes a heat-insulating box body (for example, heat-insulating box body 50) having an outer box (for example, outer box 51) and an inner box (for example, inner box 52). , a vacuum insulation material (e.g., vacuum insulation material 54, 254) disposed on the outer box side in the insulation box body, and an electrical equipment disposed on either the upper or lower part of the insulation box body. unit (e.g. external electrical equipment unit 35) and a machine room (e.g. machine room 30) which is disposed in the other of the upper and lower parts of the heat insulating box and accommodates electric parts (e.g. compressor 31). ), and at least one wire (for example, wire 40) connecting the electrical unit and the electric component within the heat insulating box. The wiring is arranged on the outer periphery of the vacuum heat insulating material in the outer box.

In the refrigerator according to one aspect of the present invention (e.g., refrigerator 1), the outer periphery of the vacuum insulation material (e.g., vacuum insulation materials 54, 254) in the outer box (e.g., outer box 51) includes heat dissipation. A pipe (for example, heat radiation pipes 25, 125) may be provided, and the wiring (for example, wiring 40) may be arranged along the heat radiation pipe.

The refrigerator (for example, refrigerator 1) according to one aspect of the present invention described above has a plurality of wires (for example, single wire 41), and an insulator (for example, outer cover material 44) covering the plurality of wires. ) may further be provided.

The refrigerator (for example, refrigerator 1) according to one aspect of the present invention described above has a plurality of wirings (for example, wiring 40), and the plurality of wirings include low voltage wiring (for example, first wiring 45). and high voltage wiring (for example, second wiring 46). The low voltage wiring is arranged along one side of the vacuum insulation material (for example, the vacuum insulation materials 54, 254), and the high voltage wiring is arranged along one side of the vacuum insulation material. may be arranged along the other side opposite to the side.

The refrigerator (for example, refrigerator 1) according to one aspect of the present invention described above has the wiring (for example, wiring 40, first wiring 45, and second wiring 46) connected to the outer box (for example, outer box 51). It further includes a sealing member (for example, adhesive tape 62) for fixing, and a part of the sealing member may be arranged so as to ride on the vacuum insulation material (for example, vacuum insulation material 54, 254). good.

In the refrigerator (e.g., refrigerator 1) according to one aspect of the present invention described above, the back surface (e.g., back surface 51c) of the outer box (e.g., outer box 51) has an injection port (for example, the back surface 51c) through which a heat insulating material is injected. For example, an injection port 58) may be provided, and the sealing member (eg, adhesive tape 62a) may be placed near the injection port.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included. Furthermore, configurations obtained by combining configurations of different embodiments described in this specification are also included in the scope of the present invention.

1: Refrigerator 25: Heat radiation pipe 30: Machine room 31: Compressor (electric parts)
35: External electrical unit (electrical unit)
40: Wiring 44: Outer covering material (insulator)
45: First wiring (low voltage wiring)
46: Second wiring (high voltage wiring)
50: Insulating box body 51: Outer box 51c: Back part 52 (of the outer box): Inner box 53: Heat insulating layer 54: Vacuum insulation material 58: Inlet 62: Adhesive tape (sealing member)
125: Heat radiation pipe 254: Vacuum insulation material

Claims (5)

an insulating box body having an outer box and an inner box;
a vacuum heat insulating material disposed within the heat insulating box on the back side of the outer box ;
an electrical unit disposed at either the upper or lower part of the heat insulating box;
a machine room disposed in the other of the upper and lower parts of the heat insulating box body and housing electric components;
at least one wiring connecting the electrical unit and the electric component within the heat insulating box,
The back part and the side part of the outer box are separate members, and the back part is configured to be attached to the rear end part of the side part,
The wiring is arranged on the outer periphery of the vacuum insulation material in the outer box,
The wiring is connected to the electrical unit and the electric component outside the insulation box,
refrigerator. A heat radiation pipe is provided on the outer periphery of the vacuum insulation material in the outer box, and the wiring is arranged along the heat radiation pipe.
The refrigerator according to claim 1. Has multiple wiring,
further comprising an insulator covering the plurality of wirings,
The refrigerator according to claim 1 or 2. Has multiple wiring,
The plurality of wirings include low voltage wiring and high voltage wiring,
The low voltage wiring is arranged along one side of the vacuum insulation material,
The high voltage wiring is arranged along the other side opposite to the one side of the vacuum insulation material,
The refrigerator according to any one of claims 1 to 3. further comprising a sealing member for fixing the wiring to the outer box,
A portion of the sealing member is arranged so as to ride on the vacuum insulation material,
The refrigerator according to any one of claims 1 to 4.

Images