JP7227196B2 - refrigerator - Google Patents

Description

Embodiments of the present invention relate to refrigerators.

2. Description of the Related Art Conventionally, a heat-insulating box body used in household refrigerators is formed by foaming and filling a space formed between an outer box made of steel plate and an inner box made of synthetic resin with a foamed heat insulating material made of urethane foam. Formed ones are common. Such a heat-insulating box body has a storage chamber with an open front inside the inner box, and the storage chamber is surrounded by heat-insulating walls at various parts. At the back of the storage compartment, there is provided an air duct in which a refrigeration cycle cooler and a ventilation fan are arranged for supplying cool air to the storage compartment.

By the way, in the refrigeration cycle, heat is exchanged between a capillary tube and a suction pipe, which are pipes connected to the refrigerant inlet side and the refrigerant outlet side of the cooler, and the heat of the capillary tube accelerates the vaporization of the refrigerant in the suction pipe. It is known to try to increase efficiency and thus reduce power usage. For this reason, in the refrigerator, the capillary tube and the suction pipe pass through the inner box and lead out to the outside of the inner box. For example, they are arranged in a U shape in order to ensure sufficient depth. A drain hose, which is a pipe for discharging defrost water from the cooler, is also led out of the inner box through the inner box, and is arranged so as to point to the defrost water evaporating plate in the lower part of the heat insulating box body.

On the other hand, in a refrigerator, a foamed heat insulating material is filled between the outer box and the inner box to form a heat insulating wall. However, as mentioned above, if there are pipes outside the inner box, it is necessary to ensure the thickness of the foam insulation so that the pipes are completely buried in the foam insulation, and the insulation of the insulation wall There is a limit to the thinning of .

JP 2007-78264 A

Therefore, a refrigerator is provided in which the thickness of the heat insulating material in the heat insulating wall can be reduced without being affected by linear members such as pipes.

The refrigerator of this embodiment includes an outer box and an inner box arranged in the outer box, and a heat insulating box body having a storage chamber inside, and the heat insulating box body is a heat insulating material that is vacuum-insulated. The foam insulation has a panel and a foam insulation material, and the foam insulation material is filled between the corner portion of the inner box and the corner portion of the outer box, and the thickness of the foam insulation increases at the corner portion. A tubular member is embedded in the material portion, and as the tubular member, a plurality of tubular members each having a different function are integrated, and a single tubular member has a thickness at the corner portion. embedded in the portion of the foamed heat insulating material with increased heat insulation, and in which the plurality of tubular members are integrated, among the plurality of tubular members having different functions, the tubular members having the same function are arranged to face each other, and there is no other tubular member between the tubular members that perform the same function, and the tubular members that perform the same function are separated from each other Characterized by

FIG. 2 is an enlarged cross-sectional view along line AA of FIG. 2 showing the first embodiment; Vertical side view showing a schematic configuration of the entire refrigerator Configuration diagram of refrigeration cycle Perspective view showing the disassembled outer case Perspective view of the inner box seen from the back FIG. 1 equivalent view showing the second embodiment Diagram showing how adhesive is applied to a vacuum insulation panel FIG. 5 equivalent view showing the third embodiment FIG. 1 equivalent view showing the fourth embodiment Diagram equivalent to Fig. 5 FIG. 2 equivalent view showing the fifth embodiment Diagram equivalent to Fig. 5 FIG. 5 equivalent view showing the sixth embodiment Layout configuration diagram of a pipe body showing the seventh embodiment

A plurality of embodiments will be described below with reference to the drawings. In each embodiment, substantially the same components are denoted by the same reference numerals, and descriptions thereof are omitted.

(First embodiment)
A first embodiment will be described below with reference to FIGS. 1 to 5. FIG.
As shown in FIGS. 1 and 2, the heat insulating box 1 has a heat insulating material between (the space between) an outer box 2 made of steel and an inner box 3 made of synthetic resin, although the details will be described later. A plurality of storage chambers are provided inside. Specifically, as shown in FIG. 2, in the heat insulating box 1, a refrigerating compartment 4 and a vegetable compartment 5 are provided in order from the top, and below them are an ice making compartment 6 and a small freezing compartment (not shown). are arranged side by side, and a freezer compartment 7 is provided below them. An automatic ice-making device 8 is provided in the ice-making chamber 6 .

The refrigerating compartment 4 and the vegetable compartment 5 are both storage compartments in a refrigerating temperature zone (for example, a plus temperature zone of 1 to 4° C.), and are separated vertically by a partition wall 9 made of synthetic resin. there is A front opening of the refrigerating compartment 4 is provided with a hinge-openable heat insulating door 4a, and a front opening of the vegetable compartment 5 is provided with a pull-out heat insulating door 5a. A lower case 10 constituting a storage container is connected to the rear surface of the heat insulating door 5a. An upper case 11 smaller than the lower case 10 is provided above the lower case 10 . A chilled compartment 12 is provided at the bottom of the refrigerator compartment 4 (above the partition wall 9). A chilled case 13 is provided in the chilled room 12 so that it can be put in and taken out.

The ice making compartment 6, the small freezing compartment, and the freezing compartment 7 are all storage compartments in a freezing temperature range (for example, a negative temperature range of -10 to -20°C). A heat-insulating partition wall 14 vertically separates the freezer compartment. A drawer-type heat insulating door 6a is provided at the front opening of the ice making chamber 6, and an ice storage container 15 is connected to the rear portion of the heat insulating door 6a. Although not shown, the front opening of the small freezer compartment is also provided with a drawer-type heat insulating door to which a storage container is connected. A front opening of the freezer compartment 7 is also provided with a drawer-type heat insulating door 7a to which a lower storage container 7b and an upper storage container 7c are connected.

A refrigerating cycle 16 (see FIG. 3) for cooling each storage compartment is incorporated in the heat insulating box 1 . Although details will be described later, the refrigerating cycle 16 includes a refrigerating cooler 17 for cooling storage compartments in the refrigerating temperature zone (refrigerating compartment 4, vegetable compartment 5), and storage compartments in the freezing temperature zone (ice making compartment 6, small It comprises a freezer compartment and a freezer cooler 18 for cooling the freezer compartment 7). As shown in FIG. 2 , a machine room 19 is provided on the rear side of the lower end portion of the heat insulating box 1 . In this machine room 19, there are a compressor 20 and a condenser 21 (see FIG. 3) which constitute the refrigerating cycle 16, a cooling fan (not shown) for cooling them, a defrosted water evaporating plate 35 to be described later, and the like. are arranged.

At the back of the storage compartments (refrigerating room 4, vegetable compartment 5) of the refrigerating temperature range of the heat insulating box 1, a refrigerating cooler 17 is provided. A cold air supply duct 30 for supplying cold air to the inside of the chamber 5), a refrigerating side blower fan 31 for circulating the cold air, and the like are arranged as follows. That is, the rear heat insulating wall of the heat insulating box 1 is provided with a cold storage side cooler chamber 32 which is located behind the lowest chilled chamber 12 of the cold storage chamber 4 and also serves as an air duct. A suction port 37 facing the inside of the vegetable compartment 5 from above is provided at the lower front side of the refrigerator-side cooler compartment 32 . The refrigerating cooler 17 is arranged in the refrigerating-side cooler chamber 32 .

A refrigerator-side water receiving portion 33 for receiving defrosted water from the refrigerator-side cooler 17 is provided in the lower rear portion of the refrigerator-side cooler chamber 32 . The refrigerator-side water receiver 33 communicates with a defrost water evaporating plate 35 provided in the machine room 19 via a refrigerator-side drain hose 34, which is a drainage pipe arranged as described later. As a result, the defrosted water received by the refrigerator-side water receiving portion 33 is led to the defrost-water evaporation tray 35 through the refrigerator-side drainage hose 34 and evaporated in the defrost-water evaporation tray 35. ing.

A refrigerating-side blower fan 31 and a blower duct 36 are provided behind the chilled chamber 12 . The air duct 36 has a lower end communicating with the rear upper portion of the refrigerator-side cooler chamber 32, and an upper end of the cold air supply duct 30 provided so as to extend upward with a constant width on the back heat insulating wall of the refrigerator chamber 4. connected to the department. The cool air supply duct 30 is provided with a plurality of cool air supply ports 30 a that open inside the refrigerator compartment 4 . Although not particularly shown in the drawing, communication holes are formed in both left and right corners of the rear part of the partition wall 9 forming the bottom plate of the refrigerating chamber 4 . One of the communication ports communicates the refrigerator compartment 4 with the vegetable compartment 5 below it, and the other communicates the refrigerator compartment 4 with the front side of the refrigerator-side cooler compartment 32 .

In this configuration, when the refrigerator-side blower fan 31 is driven, as indicated by the arrow in FIG. Air is blown out to the air duct 36 side. The air blown out toward the blower duct 36 passes through the cool air supply duct 30 and is blown out into the refrigerator compartment 4 from the plurality of cool air supply ports 30a. A part of the air blown into the refrigerator compartment 4 is also supplied into the vegetable compartment 5 through the communication port, and finally sucked into the ventilation duct 36 via the refrigerator-side cooler compartment 32 by the refrigerator-side blower fan 31 . A cycle of being In this process, the air passing through the refrigerating-side cooler chamber 32 is cooled by the refrigerating cooler 17 to become cold air, and the cold air is supplied to the refrigerating chamber 4 and the vegetable chamber 5, thereby 5 is cooled to a temperature in the refrigeration temperature zone.

A freezing-side cooler chamber 38 that also serves as a blower duct is provided in the inner part of the freezing temperature zone storage chamber (the ice making chamber 6, the small freezing chamber, and the freezing chamber 7) of the heat insulating box 1. A freezing cooler 18, a defrosting heater (not shown), and the like are arranged below the freezing cooler chamber 38 . A freezing-side blower fan 39 is arranged above the freezing-side cooler chamber 38 . A cold air outlet 38a is provided in the middle of the front surface of the freezer-side cooler chamber 38, and a return port 38b is provided in the lower end.

A freezing-side water receiver 40 is provided below the freezing cooler 18 to receive defrosted water during defrosting of the freezing cooler 18 . This freezer-side water receiving portion 40 is communicated with a defrost water evaporating dish 35 provided in the machine room 19 via a freezer-side drain hose 41 passing through the bottom heat insulating wall of the heat insulating box 1 . As a result, the defrosted water received by the freezing-side water receiving portion 40 is also guided to the defrosting-water evaporating plate 35 through the freezing-side drain hose 41 and evaporated in the defrosting-water evaporating plate 35. ing.

In this configuration, when the freezing side blower fan 39 is driven, the cold air generated by the freezing cooler 18 is supplied from the cold air outlet 38a into the ice making compartment 6, the small freezer compartment, and the freezer compartment 7. , and returned into the freezer-side cooler chamber 38 from the return port 38b. As a result, the ice making compartment 6, the small freezer compartment and the freezer compartment 7 are cooled.

Next, the configuration of the refrigerating cycle 16 will be described in detail. As shown in FIG. 3, the refrigerating cycle 16 includes a compressor 20, a condenser 21, a dryer 22, a three-way valve 23, capillary tubes 24 and 25, and coolers 17 and 18 in the order of refrigerant flow. It is configured by being connected in a ring. A condenser 21 and a dryer 22 are connected in order to the high-pressure discharge port of the compressor 20 via a connection pipe 26 . A three-way valve 23 is connected to the discharge side of the dryer 22 . The three-way valve 23 has one inlet to which the dryer 22 is connected and two outlets. To one of the two outlets of the three-way valve 23, a refrigerating-side capillary tube 24 and a refrigerating cooler 17, which are connecting pipes, are connected in order. This refrigerating cooler 17 is connected to the compressor 20 via a refrigerating side suction pipe 27 which is a connecting pipe.

Of the two outlets of the three-way valve 23, the other outlet is connected in order to the freezing side capillary tube 25 and the freezing cooler 18, which are connecting pipes. The refrigerating cooler 18 is connected to the compressor 20 via a refrigerating side suction pipe 28 which is a connecting pipe. A check valve 29 is provided between the freezing cooler 18 and the compressor 20 to prevent the refrigerant from the refrigerating cooler 17 from flowing back to the freezing cooler 18 side.

Next, a specific configuration of the heat insulation box 1 will be described with reference to FIGS. 1, 3 to 5 as well.
The outer case 2 made of steel plate has a left side plate 50, a right side plate 51, a top plate 52, a bottom plate 53 and a back plate 54, and has an open front surface. The left side plate 50, the right side plate 51, and the top plate 52 are formed by bending one long steel plate into a substantially U shape. A stepped portion 53 a for forming the machine chamber 19 is formed by bending the bottom plate 53 . In addition, the left side plate 50 and the right side plate 51 are formed with inwardly protruding flange portions 50a and 51a (see FIG. 1) at the front ends thereof, and forward flange portions 50b and 51b at the rear end portions thereof. (see FIG. 1) are formed. Further, at both left and right ends of the back plate 54, flange portions 54a and 54b (see FIG. 1) are formed to be inserted into and engaged with the flange portions 50b and 51b of the left side plate 50 and the right side plate 51, respectively. Injection holes 55 (see FIG. 4) are formed in the central portions of the left and right sides of the back plate 54, respectively.

The inner box 3 made of synthetic resin is integrally molded by a vacuum forming machine, and includes a left side plate 56 and a right side plate 56 corresponding to the left side plate 50, right side plate 51, top plate 52, bottom plate 53 and back plate 54 of the outer case 2. It has a plate 57, a top plate 58, a bottom plate 59 and a back plate 60, and has an open front surface. The bottom plate 59 is formed with a stepped portion 59a corresponding to the stepped portion 53a of the bottom plate 53 of the outer casing 2 for forming the machine chamber 19 . The front ends of the left side plate 56 and the right side plate 57 are formed with flange portions 56a and 57a that are inserted into and engaged with the flange portions 50a and 51a of the left side plate 50 and the right side plate 51 of the outer case 2, respectively. In addition, at the corners formed by the back plate 60 and the left side plate 56, the right side plate 57 and the top plate 58, which are connected to the back plate 60, there is a housing plate that protrudes inward from the inner box 3 beyond the corners. Chamfered portions 61, 62 and 63 (see FIGS. 1, 2 and 4) are formed as recesses. On both left and right sides of the back plate 60 of the inner box 3, the base ends are located at the chamfered portions 61 or 62, and the inner box is connected between the left side plates 50 and 56 or between the right side plates 51 and 57. 3 are formed with a plurality of recesses 64 protruding inwardly. A gas vent hole 64a (see FIG. 1) is formed at the tip of each recess 64. As shown in FIG.

5, the refrigerating-side capillary tube 24 and the refrigerating-side suction pipe 27 of the refrigerating cycle 16 are guided from the back plate 60 side of the inner box 3 to the chamfered portion 62 side, and then out of the chamfered portion 62. , and integrated with each other by, for example, brazing so as to be heat exchangeable to form a pipe body 65 (see FIGS. 1 and 2). Further, the pie body 65 rises along the outer surface of the chamfered portion 62 of the inner box 3, further along the outer surface of the chamfered portion 63 toward the left side plate 56, and makes a U-turn on the left side plate 56 side. It is arranged so as to descend along the outer surface of the chamfered portion 62 after being oriented in the direction of the right side plate 57 .

Here, the refrigeration-side capillary tube 24 and the refrigeration-side suction pipe 27 of the refrigerating cycle 16 are integrated so as to be capable of exchanging heat. This is to improve the operating efficiency of the refrigerating cycle 16 and reduce the power consumption. In this embodiment, the freezing-side capillary tube 25 and the freezing-side suction pipe 28 are also arranged in the same manner, but the illustration thereof is omitted here. 5, the refrigerating side drain hose 34 of the refrigerating side water receiving portion 33 is extended from the back plate 60 side in the inner box 3 to the chamfered portion 62 side, and extends to the outside of the chamfered portion 62. Further, it is arranged so as to descend along the outer surface of the chamfered portion 62 .

Thus, as shown in FIGS. 1, 2 and 4, the inner surfaces of the left side plate 50 and the right side plate 51 of the outer box 2 are provided with double-sided adhesive tape or an adhesive such as hot-melt, respectively. The back surfaces of the panels 66 and 67 are adhered, and the outer surfaces of the top plate 58 and the bottom plate 59 of the inner box 3 are attached to the surfaces of the vacuum insulation panels 68 and 69 as heat insulating materials by double-sided adhesive tape or adhesive such as hot melt. A back surface of a vacuum insulation panel 70 as a heat insulating material is adhered to the inner surface of the back plate 54 of the outer box 2 with an adhesive such as double-sided adhesive tape or hot melt. Then, as shown in FIG. 1, the inner case 3 is placed inside the outer case 2, and the flange portions 56a and 57a of the left side plate 56 and the right side plate 57 of the inner case 3 are attached to the left side plate 50 and the right side plate of the outer case 2. As shown in FIG. The bottom plate 53 is attached to the left side plate 50 and the right side plate 51 of the outer case 2, and the back plate 54 is attached to the left side plate 50, the right side plate 51 and the top plate of the outer case 2. 62 and the bottom plate 53 , and the surface of the vacuum insulation panel 70 is pressed against the outer surface of the back plate 60 of the inner box 3 .

After that, as shown in FIG. 4, the front openings of the outer box 2 and the inner box 3 are placed downward, and a foaming jig is fitted in the inner box 3, and the back of the outer box 2 is pressed. An undiluted solution of foamed heat insulating material made of urethane foam is injected from the injection hole 55 of the plate 54 . The undiluted foam insulation material injected between the outer box 2 and the inner box 3 through the injection hole 55 was received by the flanges 50a, 51a and 56a, 57a of the front openings of the outer box 2 and the inner box 3. After that, it is expanded by foaming and rises between the left side plates 50 and 56, between the right side plates 51 and 57, and between the top plates 52 and 58 of the outer box 2 and the inner box 3, and is filled with the foamed heat insulating material 71 as a heat insulating material. is configured.

In the heat insulating box 1 using both the vacuum heat insulating panels 66 or 70 and the foam heat insulating material 71 as the heat insulating material, as shown in FIG. The right side plates 51 and 57, the vacuum heat insulation panel 67 and the foam heat insulating material 71b constitute the right side heat insulation wall, and as shown in FIG. The foam insulation 71c constitutes a top insulation wall, the bottom plates 53, 59, the vacuum insulation panel 69 and the foam insulation 71d constitute a bottom insulation wall, and as shown in FIGS. , 60 and vacuum insulation panel 70 constitute the back insulation wall. In this case, in the heat insulating box 1, the vacuum heat insulating panels 66 to 70 are set to have substantially the same thickness, and the foam heat insulating materials 71a to 71d are set to have substantially the same thickness. The thickness dimension of the heat insulating materials 71a to 71d is set equal to or smaller than, for example, substantially equal to, the thickness dimension of the vacuum insulation panels 66 to 70. As shown in FIG.

In addition, in the heat insulating box 1, as shown in FIG. , and the chamfered portion 61 of the inner box 3 is filled with a foamed heat insulating material 71e having a thickness dimension larger than that of the foamed heat insulating materials 71a to 71d. The space formed by the rear surface of the vacuum insulation panel 67, the right side of the plate vacuum insulation panel 70, and the chamfered portion 62 of the inner box 3 has a thickness larger than that of the foam insulation 71a to 71d. It is filled with a foamed heat insulating material 71f. As shown in FIG. 2, the corner portion formed by the top plate 52 and the back plate 54 of the outer box 2, the rear surface portion of the vacuum heat insulating panel 68, the upper surface portion of the vacuum heat insulating panel 70, and the chamfered portion 63 of the inner box 3. is filled with a foam heat insulating material 71g having a thickness dimension larger than that of the foam heat insulating materials 71a to 71d. , and the stepped portions 53a and 59a are filled with a foamed heat insulating material 71h having a thickness larger than that of the foamed heat insulating materials 71a to 71d. Between the vacuum insulation panel 70 whose back surface is adhered to the inner surface of the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3 pressed against it, there is a gap between the left side plates 50 and 56 or the right side plate 51 . , 57 flows into the plurality of recesses 64 to fill the plurality of recesses 64 with the foam heat insulating material 71i (see FIG. 1). is adhered to the outer surface (back surface) of the back plate 60 of the .

In the above case, in the heat insulating box 1, the left side heat insulating wall composed of the left side plates 50 and 56, the vacuum heat insulating panel 66 and the foam heat insulating material 71a, and the right side plates 51 and 57, the vacuum heat insulating panel 67 and the foam heat insulating material 71b a right side heat insulating wall consisting of the top plates 52 and 58, the vacuum heat insulating panel 68 and the foam heat insulating material 71c, and a bottom heat insulating wall consisting of the bottom plates 53 and 59, the vacuum heat insulating panel 69 and the foam heat insulating material 71d. constitutes a side heat insulating wall other than the back heat insulating wall composed of the back plates 54 and 60 and the vacuum heat insulating panel 70. As shown in FIG. In the left and right heat insulating walls, foamed heat insulating materials 71a and 71b are present between the inner box 3 and the surfaces of the corresponding vacuum heat insulating panels 66 and 67, and the top heat insulating wall and bottom heat insulating wall are provided. At the walls there is foam insulation 71c and 71d between the outer box 2 and the back of the corresponding vacuum insulation panels 68 and 69, while at the back wall the inner box 3 and the corresponding vacuum insulation panels are present. 70 are in contact with each other, and there is only a partial adhesion foamed heat insulating material 71i between them. Therefore, in the back insulation wall, the area without foam insulation on the surface corresponding to the inner box 3 of the vacuum insulation panel 70 and the back surface corresponding to the outer box 2 is the left side insulation wall and the right side insulation wall, which are the other side insulation walls. It is set to be wider than that of the wall, top insulation wall and bottom insulation wall. In other words, the amount of foam insulation used in the back insulation wall is greater than the amount of foam insulation used in the other side insulation walls, namely, the left side insulation wall, the right side insulation wall, the top insulation wall, and the bottom insulation wall. It is remarkably small.

In the above case, in the heat insulating box 1, chamfered portions 62 and 63 are formed at the corner formed by the right side plate 57 and the back plate 60 of the inner box 3 and the corner formed by the top plate 58 and the back plate 60. A space is formed outside the chamfered portions 62 and 63 by the amount that the chamfered portions 62 and 63 protrude inward of the inner box 4, and this serves as a storage recess. In this embodiment, as shown in FIGS. 1 and 2, a pipe body 65 is embedded in the increased portions of foamed heat insulating materials 71f and 71g. , the refrigerating side drain hose 34 is embedded in the foamed heat insulating material 71f.

As described above, according to the first embodiment, the corners formed by the back plate 60 of the inner case 3 and the left side plate 56, right side plate 57 and top plate 58 which are connected thereto have more space for the inner case 3 than the corners. Chamfered portions 61, 62 and 63 are formed as storage recesses protruding inward, and the outer side of the chamfered portions 62 and 63 as any of these is filled with foamed heat insulating materials 71f and 71g. As the thickness increases, a pipe body 65 as a connecting pipe is embedded in the increased portions of the foamed heat insulating material 71f and 71g, and a refrigerating side drain hose 34 as a draining pipe is connected to the foamed heat insulating material 71f portion. Therefore, it is not necessary to arrange the pipe body 65 and the refrigerating side drain hose 34 between the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3, and the back plate 54 of the outer box 2 and the inner A vacuum insulation panel 70 having a small thickness can be easily arranged between the back plate 60 of the box 3 and the back panel 60 of the box 3.例文帳に追加That is, on the outer surface side of the back plate 60, which is the portion of the back plate 60 of the inner box 3 that is close to the vacuum insulation panel 70, the pipe member 65 and the refrigerating side drain hose 34 do not exist.

A vacuum insulation panel 70 is arranged between the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3, and the undiluted solution of the foamed heat insulating material is injected between the outer box 2 and the inner box 3 to foam. When filling, the foamed heat insulating material is hardly filled between the vacuum heat insulating panel 70 and the back plate 60 of the inner box 3, so that the foamed heat insulating material is not filled between the back plate 54 and the back plate 60. It is not necessary to inject the undiluted solution having a foaming ratio higher than that required to obtain the foaming pressure that flows into the foamed heat insulating material.

In addition, since the back plate 60 of the inner box 3 is formed with a plurality of recesses 64 protruding inwardly, and the recesses 64 are filled with the foamed heat insulating material 71i by flowing the foamed heat insulating material into the recesses 64, the foamed heat insulating material 71i is filled with the foamed heat insulating material. The heat insulating material 71i can be used as an adhesive to bond the vacuum insulation panel 70 to the back plate 60 of the inner box 3, so that the insulation panel 70 is attached to the back plate 60 of the inner box 3 before foam filling with foam insulation. This eliminates the need to adhere to the body and simplifies the assembly work. In this case, since the gas vent hole 64a is formed at the tip of the recess 64, even if the width of the recess 64 (groove width through which the foam heat insulating material flows) is narrow, the foam heat insulating material 71i can be sufficiently flowed and filled. can be done.

(Second embodiment)
6 and 7 show a second embodiment, and the differences from the first embodiment will be explained below.

In this second embodiment, the back plate 60 of the inner box 3 does not have a plurality of recesses 64 (see FIG. 6). That is, in this second embodiment, the vacuum insulation panel 70 is adhered to the back plate 60 of the inner box 3 before filling with the foam insulation material.

Specifically, the vacuum insulation panel 70 is adhered to the inner surface of the back plate 54 of the outer box 2 with double-sided adhesive tape or an adhesive such as hot melt, and then the back plate 54 is placed so that the surface side of the vacuum insulation panel 70 faces upward. As shown in FIG. 7, a roll coater 72 applies hot melt as an adhesive to the surface of the vacuum insulation panel 70 (the upper surface in FIG. 7).

The roll coater 72 includes a coating roll 73 for applying hot melt in contact with the surface of the vacuum insulation panel 70, a backup roll 74 in contact with the outer surface (lower surface in FIG. 7) of the back plate 54, and the coating roll 73 with hot melt. A pick-up roll 75 to be supplied is rotatably supported by a support (not shown), and the back plate 54 is moved rightward in FIG. is applied. In this case, the height dimension (projection dimension) Lb of the flange portions 54a and 54b of the back plate 54 is the height dimension of the vacuum insulation panel 70 (the thickness dimension of the vacuum insulation panel 70 + the plate thickness dimension of the back plate 54) La It is set to be smaller (Lb<La) to prevent the flanges 54a and 54b from contacting and damaging the coating roll 73 when the back plate 54 is moved.

Thus, in this second embodiment, the back plate 54 having the vacuum insulation panel 70 coated with hot melt as described above has flange portions 54a and 54b on the flanges of the left side plate 50 and the right side plate 51. When the vacuum insulation panel 70 is attached to the outer box 2 after being inserted into the portions 50b and 51b, the front side of the vacuum insulation panel 70 is pressed against the rear surface (outer surface) of the back plate 60 of the inner box 3 and adhered by hot-melt.

After that, the undiluted solution of the foam insulation material is injected between the outer box 2 and the inner box 3 to make it foam. Since the portions 56a and 57a are in an unstable state where the portions 56a and 57a are only inserted and engaged with the flange portions 50a and 51a, there is a risk that the inner box 3, which has weak mechanical strength, will be deformed. However, in this second embodiment, the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3 are integrated by a vacuum insulation panel 70 adhered to both, so that the strength of the inner box 3 is increased. Therefore, the inner box 3 is not deformed even if there is time until the foamed heat insulating material is foamed and filled.

By the way, as described above, when the back plate 54 is attached to the outer box 2 and the vacuum insulation panel 70 is adhered to the back plate 60 of the inner box 3, the inner box 3 is attached to the outer box 2 as described above. Since the flanges 56a and 57a of the front opening are in an unstable state where they are inserted and engaged with the flanges 50a and 51a, the vacuum insulation panel 70 is in the normal position on the back plate 60 of the inner box 3. Not sure if it will stick or not. If the inner box 3 is displaced from the normal position and the vacuum insulation panel 70 is adhered to the back plate 60 of the inner box 3 at a position displaced from the normal position, foaming will occur between the outer box 2 and the inner box 3. When a foaming jig is fitted in the inner box 3 to fill the foam by pouring the undiluted solution of the heat insulating material, the inner box 3 is forcibly moved to the regular position by this, so that the inner box 3 is forcibly moved to the normal position. Stress acts on the box 2 and the inner box 3, and as a result, the inner box 3, which has weak mechanical strength, may be wrinkled or distorted.

On the other hand, in the second embodiment, chamfered portions 61, 62 and 63 are formed at the corners formed by the back plate 60 of the inner case 3 and the left side plate 56, right side plate 57 and top plate 58 connected thereto. The chamfered portions 61, 62, 63 absorb the stress caused by the displacement of the bonding position of the vacuum insulation panel 70 as described above, thereby preventing the inner box 3 from being wrinkled or distorted. can be done. The chamfered portions 61, 62 and 63 of the inner box 3 are preferably linear, but may be slightly arcuate.

(Third embodiment)
FIG. 8 shows a third embodiment, and the differences from the first embodiment will be explained below. In the following description, FIG. 2 will also be referred to for convenience of description.

In this third embodiment, a plurality of recesses 64 are not formed in the back plate 60 of the inner box 3, as in the second embodiment. Instead, the back plate 60 of the inner box 3 is formed with a storage recess 76 which is positioned on the back side of the refrigerator-side cooler chamber 32 functioning as an air duct and protrudes inward of the inner box 3 . The storage recess 76 is formed so as to extend horizontally from the top and bottom center of the back plate 60 to the chamfered portion 62 . Further, the back plate 60 of the inner box 3 is formed with a storage recess 77 located on the rear side of the lower portion in the vicinity of the refrigerator-side cooler chamber 32 and protruding inward of the inner box 3 . This storage recess 77 is also formed so as to extend horizontally from the vertical center position of the back plate 60 to the position of the chamfered portion 62 .

The pipe body 65 is guided from the central position of the back plate 60 of the inner box 3 into the storage recess 76, guided along the storage recess 76 to the outer surface of the chamfered portion 62, and thereafter is guided to the chamfered portion 62. , guided toward the left side plate 56 along the outer surface of the chamfered portion 63, and further guided downward along the outer surface of the chamfered portion 61, thereby being arranged in a gate shape. be. The refrigerating side drain hose 34 is led out from the central position of the back plate 60 of the inner box 3 into the storage recess 77, is guided along the storage recess 77 to the outer surface of the chamfered portion 62, and is then chamfered. It is guided downward along the outer surface of the portion 62 .

After that, the vacuum insulation panel 70 is adhered to the back plate 60 of the inner box 3 in the same manner as in the second embodiment. Since it is housed within 77, the vacuum insulation panel 70 will not ride on the pipe body 65 and the refrigerating side drain hose 34 and float up. After that, the undiluted solution of the foamed heat insulating material is poured into the space between the outer box 2 and the inner box 3 to foam-fill the foamed heat insulating material. The pipe body 65 and the refrigerating side drain hose 34 are embedded in the foamed heat insulating material.

According to the third embodiment, there is a structural or technical reason that the pipe body 65 and the refrigerating side drain hose 34 must be led out of the inner box 3 from the central portion of the back plate 60 of the inner box 3. Even in such a case, the back plate 60 of the inner box 3 is formed with inwardly projecting storage recesses 76 and 77, and the pipe body 65 and the refrigerating side drain hose 34 are led out and stored in these storage recesses 76 and 77. Therefore, when the vacuum insulation panel 70 is adhered to the bottom plate of the inner box 3, it is possible to prevent the vacuum insulation panel 70 from being deformed by riding on the pipe body 65 and the refrigerating side drain hose 34 and floating up. It does not adversely affect the insulation performance of the insulation panel 70 . Moreover, since the pipe body 65 is disposed on all of the chamfered portions 61, 62 and 63 of the inner casing 3 to form a gate shape, the distance of the pipe body 65 can be sufficiently secured.

(Fourth embodiment)
9 and 10 show a fourth embodiment, and the differences from the first embodiment will be explained below. In the following description, FIG. 2 will also be referred to for convenience of description. In this fourth embodiment, a plurality of recesses 64 are not formed in the back plate 60 of the inner box 3, as in the second embodiment.

As shown in FIG. 2, at the back of the freezer compartment 7, there is provided a freezer-side cooler chamber 38 also serving as a blower duct in which a freezer cooler 18 and a freezer-side blower fan 39 are arranged. As shown in 9, the left and right end portions of the freezer-side cooler chamber 38 are waste spaces (dead spaces) in which food cannot be stored. In this fourth embodiment, a back plate 60 of the inner box 3 is provided on the inner side of the inner box 3 in order to utilize the right dead space, which is one of the dead spaces on the right and left end sides of the freezer-side cooler chamber 38 . A storage recess 78 is formed to protrude outward.

The freezing-side capillary tube 25 and the freezing-side suction pipe 28 connected to the freezing cooler 18 are led out from the inner box 3 into the housing recess 78 and integrated with each other, for example, by brazing so as to be capable of exchanging heat. and form a pipe body 79 which is a pipe for connection. Further, as shown in FIG. 10, the pipe body 79 is arranged so as to be directed downward after being bent twice in a U shape within the housing recess 78 .

After that, similarly to the second embodiment, the vacuum insulation panel 70 is adhered to the back plate 60 of the inner box 3, and after that, the undiluted solution of the foam insulation material is injected between the outer box 2 and the inner box 3. After being foamed, as shown in FIG. 9, the storage recess 78 is also filled with the foamed heat insulating material 71f, and the pipe body 79 is embedded in the foamed heat insulating material 71f.

According to the fourth embodiment, the storage recesses 78 are formed so as to protrude into one of the dead spaces generated on the left and right end sides of the freezer-side cooler chamber 38 in the freezer compartment 7 . Since the pipe body 79 is housed and arranged in the housing recess 78, the dead space in the freezer compartment 7 can be skillfully used to arrange the pipe body 79.

In addition, a storage recess is formed so as to protrude into the other of the dead spaces generated on the left and right end sides of the freezer-side cooler chamber 38 in the freezer compartment 7, and a refrigerating cooling device is provided in this storage recess. The pipe body 65 (see FIG. 1) of the container 17 may be housed and arranged.

(Fifth embodiment)
11 and 12 show a fifth embodiment, and the differences from the first embodiment will be explained below. In this fifth embodiment, a plurality of recesses 64 are not formed in the back plate 60 of the inner box 3, as in the second embodiment.

In the fifth embodiment, unlike the first embodiment, the bottom plate 53 of the outer box 2 and the bottom plate 59 of the inner box 3 do not have the stepped portions 53a and 59a. A stepped portion 52a for forming the machine room 19 is formed on the top plate 52, and the top plate 58 of the inner box 3 is provided with a storage recess projecting inwardly of the inner box 3 corresponding to the stepped portion 52a of the top plate 52. A stepped portion 58a is formed. The pipe body 65 arranged so as to rise along the outer surface of the chamfered portion 62 of the inner box 3 is arranged so as to be guided toward the left side plate 56 by the horizontal portion of the outer surface of the stepped portion 58a. It makes a U-turn and is guided toward the right side plate 57 , makes a U-turn again and is guided toward the left side plate 56 , and is arranged near the left side plate 56 so as to face upward. That is, the pipe body 65 is arranged in a two-turn U-shape on the horizontal portion of the stepped portion 58a.

After that, similarly to the second embodiment, the vacuum insulation panel 70 is adhered to the back plate 60 of the inner box 3, and after that, the undiluted solution of the foam insulation material is injected between the outer box 2 and the inner box 3. 11, the gap between the stepped portion 52a of the top plate 52 and the stepped portion 58a of the top plate 58 is also filled with the foamed heat insulating material 71g. embedded in

In addition, in the machine room 19, a compressor 20, a condenser 21 (see FIG. 3), a cooling fan (not shown) for cooling them, and the like are arranged. Since the top plate 58 of the inner box 3 has a stepped portion 58a, the cold air supply duct 30 has an extended duct portion 30b along the stepped portion 58a, and the cold air supply port 30a is provided at the upper end thereof. there is

According to this fifth embodiment, in the case of a refrigerator in which the compressor 20 is arranged above the heat insulating box body 1, the outer casing 2 is formed to form the machine room 19 for arranging the compressor 20 and the like. Since stepped portions 52a and 58a are formed on the top plate 52 of the inner box 3 and the top plate 58 of the inner box 3, the pipe body 65 can be arranged and stored using the space portion that is inevitably formed between the stepped portions 52a and 58a. It is something to do.

(Sixth embodiment)
FIG. 13 shows a sixth embodiment, and the differences from the fifth embodiment will be explained below.

In the fifth embodiment, the pipe body 65 is arranged in a two-turn U-shape on the horizontal portion of the stepped portion 58a of the top plate 58 of the inner box 3, but in the sixth embodiment, , the pipe body 65 is arranged in a one-turn U-shape on the horizontal portion of the stepped portion 58a, and further, after being moved to a vertical portion of the stepped portion 58a and arranged in a two-turn U-shape, the pipe body 65 is directed upward. are arranged to

According to the sixth embodiment, the length (distance) of the pipe body 65 obtained by integrating the chiller-side capillary tube 24 and the chiller-side suction pipe 27 (see FIG. 3) so as to be able to exchange heat is equal to that of the fifth embodiment. , the heat exchange between the refrigerating-side capillary tube 24 and the refrigerating-side suction pipe 27 can be sufficiently performed, and further power saving can be achieved.

(Seventh embodiment)
FIG. 14 shows a seventh embodiment, and the differences from the fifth embodiment will be explained below.

In the fifth embodiment, the pipe body 65 is arranged in a two-turn U-shape on the horizontal portion of the stepped portion 58a of the top plate 58 of the inner box 3 (see FIG. 12 for both). In the seventh embodiment, the pipe body 65 is spirally disposed on the horizontal portion of the stepped portion 58a, and then pulled out from the central portion thereof and directed upward. A plurality of spiral portions of the pipe body 65 may be arranged side by side on the horizontal portion of the stepped portion 58a, or may be provided on the vertical portion of the stepped portion 58a.

(Other embodiments)
In the first to third embodiments, the pipe body, which is a pipe in which the freezing-side capillary tube 25 and the freezing-side suction pipe 28 are integrated so as to be capable of exchanging heat, is placed on the bottom plate 59 of the inner box 3 as a storage concave portion 59a. It is good also as a structure which is stored and arrange|positioned in (the outer surface side).

In the first embodiment, the back plate 60 of the inner box 3 is formed with a storage recess that protrudes inward so as to be positioned between the upper end of the air duct 36 and the top plate 58. You may make it arrange|position the pipe body 65 to.

In the fifth embodiment, the back plate 60 of the inner box 3 is formed with an inwardly protruding storage recess positioned between the bottom plate 59 and the lower end of the freezing-side cooler chamber 38 serving as the air duct. Alternatively, a pipe body 79 (see FIG. 9) may be placed in this housing recess.

The fourth embodiment may be combined with the first to third embodiments.
The heat insulating walls of each part of the heat insulating box 1 may be composed only of the foam heat insulating material without using the vacuum heat insulating panel.

As described above, according to the refrigerator of the present embodiment, the outer case has a left side plate, a right side plate, a top plate, a bottom plate and a back plate, and the left side plate and the right side plate of the outer case are arranged in the outer case. , an inner box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate corresponding to the top plate, the bottom plate and the back plate; a heat insulating box body having a storage chamber inside, a refrigerating cycle cooler provided in the inner part of the storage room of the heat insulating box body for supplying cold air to the storage room, and and a blower duct in which a blower fan is arranged. There is no piping in the portion of the back plate of the inner box that is close to the heat insulating material, and the inner box is formed with an inwardly protruding storage recess, and the piping is arranged in this storage recess. As a result, the thickness of the heat insulating material in the back heat insulating wall can be reduced without being affected by the piping.

Although several embodiments have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

In the drawing, 1 is a heat insulating box, 2 is an outer box, 3 is an inner box, 4 is a refrigeration compartment (refrigeration temperature zone storage compartment), 5 is a vegetable compartment (refrigeration temperature zone storage compartment), 6 is an ice making compartment ( freezing temperature zone storage room), 7 freezing room (freezing temperature zone storage room), 16 refrigeration cycle, 17 refrigerating cooler, 18 freezing cooler, 19 machine room, 20 compressor, 24 is a capillary tube (pipe) on the chiller side, 25 is a capillary tube (pipe) on the freezer side, 27 is a suction pipe (pipe) on the chiller side, 28 is a suction pipe (pipe) on the freezer side, 30 is a cold air supply duct, and 31 is a chiller side. Blower fan, 32 refrigerator-side cooler chamber (air duct), 33 refrigerator-side water receiver, 34 refrigerator-side drainage hose (piping), 35 defrosting water evaporation plate, 36 ventilation duct, 38 freezer side Cooler chamber (air duct), 39 is a freezing side fan, 40 is a freezing side water receiving part, 41 is a freezing side drain hose (piping), 50 is a left side plate, 51 is a right side plate, 52 is a top plate, 52a is a 53 is the bottom plate, 53a is the stepped portion, 54 is the back plate, 56 is the left side plate, 57 is the right side plate, 58 is the top plate, 58a is the stepped portion (storage recess), 59 is the bottom plate, 59a is the stepped portion ( 60 is a back plate, 61 to 63 are chamfered portions (storage recesses), 64 is a recess, 65 is a pipe body (piping), 66 to 70 are vacuum insulation panels (heat insulation), 71 and 71a to 71i are A foamed heat insulating material (heat insulating material), 72 a roll coater, 76 to 78 storage recesses, and 79 a pipe body (piping).

Claims (1)

A heat insulating box body having an outer box and an inner box arranged in the outer box, and having a storage room inside,
The heat insulating box has a vacuum heat insulating panel and a foam heat insulating material as heat insulating materials,
The foam insulation is filled between the corner portion of the inner box and the corner portion of the outer box,
A tubular member is embedded in the portion of the foamed heat insulating material whose thickness is increased at the corner portion,
As the tubular member, a plurality of tubular members each having a different function are integrated, and a single tubular member is embedded in the portion of the foamed heat insulating material whose thickness is increased at the corner portion. and in the case where the plurality of tubular members are integrated, the tubular members having the same function among the plurality of tubular members having different functions are arranged to face each other, and the same 1. A refrigerator characterized in that no other tubular member is interposed between tubular members that perform the same function, and that the tubular members that perform the same function are separated from each other.

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