JP6918721B2 - Insulated box - Google Patents

Description

Embodiments of the present invention relate to a heat insulating box.

Conventionally, the heat insulating box body used for a refrigerator for home use is a steel plate outer box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate, and a left side plate, a right side plate, a top plate and a bottom plate of the outer box. And the space formed between the left side plate, the right side plate, the top plate, the bottom plate, and the inner box made of synthetic resin having the back plate corresponding to the back plate is filled with foamed heat insulating material made of urethane foam. What is formed is common. Such a heat insulating box has a storage chamber having an open front inside the inner box, and the storage chamber is surrounded by a heat insulating wall. In recent years, we have also proposed a vacuum insulation panel that is used as part of the heat insulating material of the heat insulating wall, and a vacuum heat insulating pal and a foamed heat insulating material are used together to reduce the amount of foamed heat insulating material used. Has been done.

In the heat insulating box body having such a configuration, the flange portion formed in the front opening of the outer box is engaged with the flange formed in the front opening of the inner box, and the front opening is aligned with the lower side. In such a state, the undiluted solution of the foamed heat insulating material is injected between the outer box and the inner box from the back plate side of the outer box to fill the foam. At the time of this foaming, the undiluted solution of the foamed heat insulating material injected between the outer box and the inner box expands due to foaming after being received by the flange portion of the front opening, and the left and right side plate portions and the top plate between the two. The part is raised, and finally, it turns 90 degrees and flows to the back plate part. In this case, if the foaming pressure of the foamed heat insulating material is not sufficient, an unfilled portion of the foamed heat insulating material is generated in the back plate portion. Despite trying to reduce the amount of foamed heat insulating material used in combination with the panel, there was a problem that the amount of foamed heat insulating material used increased.

Japanese Unexamined Patent Publication No. 2011-58657

Therefore, a heat insulating box body capable of reducing the amount of the foamed heat insulating material used when the foamed heat insulating material and the vacuum heat insulating panel are used in combination is provided.

The heat insulating box body of the embodiment is arranged in an outer box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate, and the left side plate, the right side plate, the top plate, the bottom plate and the outer box of the outer box. Between the inner box having the left side plate, the right side plate, the top plate, the bottom plate and the back plate corresponding to the back plate, the vacuum insulation panel arranged between the inner box and the outer box, and the inner box and the outer box. Corresponds to the inner box of the vacuum insulation panel in the back insulation wall composed of the vacuum insulation panel arranged between the back plate of the inner box and the back plate of the outer box. The area without foam insulation on the back surface corresponding to the front surface and the outer box corresponds to the front surface and the outer box corresponding to the inner box of the vacuum insulation panel in the side insulation wall composed of the vacuum insulation panel and the foam insulation material. It is characterized by being larger than the area without foam insulation on the back surface.

An enlarged cross-sectional view taken along the line AA of FIG. 2 showing the first embodiment. Longitudinal side view showing the schematic configuration of the entire refrigerator Configuration diagram of refrigeration cycle Perspective view showing the outer box disassembled Perspective view of the inner box seen from the back FIG. 1 corresponding diagram showing a second embodiment The figure which shows the state which the adhesive is applied to the vacuum insulation panel FIG. 5 equivalent diagram showing a third embodiment FIG. 1 corresponding diagram showing a fourth embodiment Figure 5 equivalent FIG. 2 equivalent diagram showing a fifth embodiment Figure 5 equivalent FIG. 5 equivalent diagram showing a sixth embodiment Arrangement configuration diagram of a pipe body showing a seventh embodiment

Hereinafter, a plurality of embodiments applied to the refrigerator will be described with reference to the drawings. In each embodiment, substantially the same components are designated by the same reference numerals, and the description thereof will be omitted.
(First Embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 5.

As shown in FIGS. 1 and 2, the heat insulating box body 1 has a heat insulating material between the outer box 2 made of steel plate and the inner box 3 made of synthetic resin, although the details will be described later. There are multiple storage rooms inside. Specifically, as shown in FIG. 2, a refrigerating room 4 and a vegetable room 5 are provided in the heat insulating box 1 in this order from the top, and an ice making room 6 and a small freezing room 6 (not shown) are provided below the refrigerating room 4 and the vegetable room 5. Are provided side by side, and a freezer 7 is provided below them. An automatic ice making device 8 is provided in the ice making chamber 6.

The refrigerating room 4 and the vegetable room 5 are both storage rooms in a refrigerating temperature zone (for example, a plus temperature zone of 1 to 4 ° C.), and are partitioned above and below by a partition wall 9 made of synthetic resin. There is. A hinge-opening / closing type heat insulating door 4a is provided at the front opening of the refrigerator compartment 4, and a drawer type heat insulating door 5a is provided at the front opening of the vegetable room 5. A lower case 10 constituting a storage container is connected to the back surface of the heat insulating door 5a. An upper case 11 smaller than the lower case 10 is provided on the upper part of the lower case 10. A chilled chamber 12 is provided at the lowermost part (upper part of the partition wall 9) in the refrigerating chamber 4. A chilled case 13 is provided in the chilled chamber 12 so that it can be taken in and out.

The ice making chamber 6, the small freezing chamber, and the freezing chamber 7 are all storage chambers in a freezing temperature zone (for example, a negative temperature zone of -10 to -20 ° C.), and the vegetable chamber 5, the ice making chamber 6, and the small freezing chamber 6 and the small freezing chamber 6. It is partitioned vertically from the freezing chamber by a heat insulating partition wall 14. 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 back surface of the heat insulating door 6a. Although not shown, the front opening of the small freezer is also provided with a drawer-type heat insulating door to which a storage container is connected. The front opening of the freezing chamber 7 is also provided with a drawer-type heat insulating door 7a to which the lower storage container 7b and the upper storage container 7c are connected.

A refrigeration cycle 16 (see FIG. 3) for cooling each storage chamber is incorporated in the heat insulating box 1. Although the details will be described later, the refrigerating cycle 16 includes a refrigerating cooler 17 for cooling the storage chambers in the refrigerating temperature zone (refrigerating chamber 4, vegetable compartment 5) and a storage chamber in the refrigerating temperature zone (ice making chamber 6, small). It is configured to include a freezing chamber and a refrigerating cooler 18 for cooling the freezing chamber 7). As shown in FIG. 2, a machine room 19 is provided on the back side of the lower end portion of the heat insulating box 1. In the machine room 19, a compressor 20 and a condenser 21 (see FIG. 3) constituting the refrigeration cycle 16, a cooling fan (not shown) for cooling them, a defrosting water evaporating dish 35 described later, and the like are installed. It is arranged.

In the back of the storage room (refrigerating room 4, vegetable room 5) in the refrigerating temperature zone of the heat insulating box 1, a refrigerating cooler 17 and the cold air generated by the refrigerating cooler 17 are stored in the refrigerating room 4 (and vegetables). A cold air supply duct 30 for supplying into the chamber 5), a refrigerating side blower fan 31 for circulating the cold air, and the like are arranged as follows. That is, the back heat insulating wall of the heat insulating box 1 is provided with a refrigerating side cooler room 32 that also serves as a blower duct, located behind the chilled room 12 at the lowermost stage of the refrigerating room 4. A suction port 37 facing from above is provided in the vegetable compartment 5 at the lower portion on the front side of the refrigerator compartment 32 on the refrigerating side. The refrigerating cooler 17 is arranged in the refrigerating side cooler chamber 32.

A refrigerating side water receiving portion 33 that receives defrosted water from the refrigerating cooler 17 is provided in the lower portion on the rear side of the refrigerating side cooler chamber 32. The refrigerating side water receiving portion 33 is communicated with a defrosting water evaporating dish 35 provided in the machine room 19 via a refrigerating side drain hose 34 which is a drainage pipe arranged as described later. As a result, the defrosted water received by the refrigerating side water receiving unit 33 is guided to the defrosting water evaporating dish 35 through the refrigerating side drain hose 34 and evaporates in the defrosting water evaporating dish 35. ing.

Behind the chilled chamber 12, a refrigerating side blower fan 31 is provided, and a blower duct 36 is provided. The lower end of the air blowing duct 36 communicates with the rear upper part of the refrigerator compartment 32 on the refrigerating side, and the upper end of the air duct 36 extends the lower end of the cold air supply duct 30 so as to extend upward with a certain width from the back heat insulating wall of the refrigerating chamber 4. It is communicated to the department. The cold air supply duct 30 is provided with a plurality of cold air supply ports 30a that open in the refrigerating chamber 4. Although not particularly shown in the drawing, communication ports are formed at both left and right corners of the rear portion of the partition wall 9 constituting the bottom plate of the refrigerating chamber 4. One of the communication ports communicates the refrigerating chamber 4 with the vegetable compartment 5 below the refrigerating chamber 4, and the other communicates the refrigerating chamber 4 with the front side of the refrigerating side cooler chamber 32.

In this configuration, when the refrigerating side blower fan 31 is driven, as shown by the arrow in FIG. 2, the air in the vegetable compartment 5 is sucked into the refrigerating side cooler chamber 32 from the suction port 37 and sucked. The air is blown to the air duct 36 side. The air blown out to the air blowing duct 36 side passes through the cold air supply duct 30, and is blown into the refrigerating chamber 4 from the plurality of cold air supply ports 30a. A part of the air blown into the refrigerating chamber 4 is also supplied to the vegetable compartment 5 through the communication port, and finally sucked into the air duct 36 through the refrigerating side cooler chamber 32 by the refrigerating side blower fan 31. There is a cycle of being squeezed. 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 compartment 5 to supply the refrigerating chamber 4 and the vegetable compartment. 5 is cooled to a temperature in the refrigerating temperature range.

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

A freezing side water receiving portion 40 is provided below the freezing cooler 18 to receive the defrosted water at the time of defrosting the freezing cooler 18. The freezing side water receiving portion 40 is communicated with a defrosting water evaporating dish 35 provided in the machine room 19 via a freezing side drain hose 41 passing through a bottom insulating wall of the heat insulating box 1. As a result, the defrosted water received by the refrigerating side water receiving unit 40 is also guided to the defrosting water evaporating dish 35 through the refrigerating side drain hose 41 and evaporates in the defrosting water evaporating dish 35. ing.

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

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

Of the two outlets of the three-way valve 23, the refrigerating side capillary tube 25 and the refrigerating cooler 18, which are connecting pipes, are connected in order to the other outlet. The freezing cooler 18 is connected to the compressor 20 via a freezing side suction pipe 28 which is a connection pipe. A check valve 29 is provided between the refrigerating cooler 18 and the compressor 20 to prevent the refrigerant from the refrigerating cooler 17 from flowing back to the refrigerating cooler 18 side.
Next, the specific configuration of the heat insulating box 1 will be described with reference to FIGS. 1, 3 to 5.

The outer box 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 the front surface is open. 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 step portion 53a for forming the machine room 19 is bent and formed on the bottom plate 53. Further, in the left side plate 50 and the right side plate 51, flange portions 50a and 51a (see FIG. 1) protruding inward are formed at the front end portions, and flange portions 50b and 51b pointing forward are formed at the rear end portions. (See FIG. 1) is formed. Further, flange portions 54a and 54b (see FIG. 1) that are inserted and engaged with the flange portions 50b and 51b of the left side plate 50 and the right side plate 51 are formed at both left and right ends of the back plate 54. Injection holes 55 (see FIG. 4) are formed in the central portions of the left and right side portions of the back plate 54, respectively.

The inner box 3 made of synthetic resin is integrally molded by a vacuum forming machine, and the left side plate 50, the right side plate 51, the top plate 52, the bottom plate 53, and the left side plate 56 and the right side corresponding to the back plate 54 of the outer box 2 are formed. It has a plate 57, a top plate 58, a bottom plate 59, and a back plate 60, and the front surface is open. The bottom plate 59 is formed with a stepped portion 59a for forming the machine room 19 corresponding to the stepped portion 53a of the bottom plate 53 of the outer box 2. Flange portions 56a and 57a that are inserted and engaged with the flange portions 50a and 51a of the left side plate 50 and the right side plate 51 of the outer box 2 are formed at the front end portions of the left side plate 56 and the right side plate 57. Further, the corner portion formed by the back plate 60 and the left side plate 56, the right side plate 57, and the top plate 58 which are other plates connected to the back plate 60 is stored so as to project inward of the inner box 3 from the corner portion. Chamfered portions 61, 62 and 63 (see FIGS. 1, 2 and 4) are formed as recesses. Then, on the left and right sides of the back plate 60 of the inner box 3, the base end portions are located at the chamfered portions 61 or 62 and are connected between the left side plates 50 and 56 or between the right side plates 51 and 57. A plurality of recesses 64 protruding inward of 3 are formed. A gas vent hole 64a (see FIG. 1) is formed at the tip of each recess 64.

Then, 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 in the inner box 3 to the chamfering portion 62 side, and the outside of the chamfering portion 62. The pipe body 65 is formed by being led out to one side and being brazed to each other, for example, so as to be heat exchangeable (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 directs toward the left side plate 56 along the outer surface of the chamfered portion 63, and makes a U-turn on the left side plate 56 side. After facing the right side plate 57 direction, it is arranged so as to descend along the outer surface of the chamfered portion 62.

Here, the heat exchangeable integration of the refrigerating side capillary tube 24 and the refrigerating side suction pipe 27 of the refrigerating cycle 16 promotes the vaporization of the refrigerant in the refrigerating side suction pipe 27 by the heat of the refrigerating side capillary tube 24. This is to improve the operating efficiency of 16 of the refrigeration cycle and to reduce the amount of electric power used. In this embodiment, the refrigerating side capillary tube 25 and the refrigerating side suction pipe 28 are arranged in the same manner, but the illustration is omitted here. Further, as shown in FIG. 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. It is derived and further arranged so as to descend along the outer surface of the chamfered portion 62.

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 vacuum-insulated as a heat insulating material by using an adhesive such as double-sided adhesive tape or hot melt. The back surfaces of the panels 66 and 67 are bonded, and the front surfaces of the vacuum heat insulating panels 68 and 69 as heat insulating materials are formed on the outer surfaces of the top plate 58 and the bottom plate 59 of the inner box 3 by an adhesive such as double-sided adhesive tape or hot melt, respectively. The back surface of the vacuum heat insulating panel 70 as a heat insulating material is bonded 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 box 3 is arranged in the outer box 2, and the flange portions 56a and 57a of the left side plate 56 and the right side plate 57 of the inner box 3 are placed on the left side plate 50 and the right side plate of the outer box 2. Insert and engage with the flange portions 50a and 51a of 51, attach the bottom plate 53 to the left side plate 50 and the right side plate 51 of the outer box 2, and further attach the back plate 54 to the left side plate 50, the right side plate 51, and the top plate of the outer box 2. Attached to 62 and the bottom plate 53, the surface of the vacuum heat insulating 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 on the lower side, and the foaming jig is fitted in the inner box 3, and the back of the outer box 2 is set. The undiluted solution of the foamed heat insulating material made of urethane foam is injected from the injection hole 55 of the plate 54. The undiluted solution of the foamed heat insulating material injected from the injection hole 55 between the outer box 2 and the inner box 3 was received by the flange portions 50a, 51a and 56a, 57a of the front openings of the outer box 2 and the inner box 3. After that, it expands by foaming and is filled by ascending between the left side plates 50 and 56 of the outer box 2 and the inner box 3, between the right side plates 51 and 57, and between the top plates 52 and 58, and the foamed heat insulating material 71 as a heat insulating material. Is configured.

In the heat insulating box 1 in which the vacuum heat insulating panels 66 to 70 and the foamed heat insulating material 71 are used in combination as the heat insulating material, as shown in FIG. 1, the left side plates 50 and 56, the vacuum heat insulating panel 66 and the foamed heat insulating material 71a are on the left side. The right side plates 51 and 57, the vacuum heat insulating panel 67 and the foamed heat insulating material 71b constitute the right side heat insulating wall, and as shown in FIG. 2, the top plates 52 and 58, the vacuum heat insulating panel 68 and The foamed heat insulating material 71c constitutes a top heat insulating wall, and the bottom plates 53 and 59, the vacuum heat insulating panel 69 and the foamed heat insulating material 71d form a bottom heat insulating wall, and as shown in FIGS. 1 and 2, the back plate 54 , 60 and the vacuum insulation panel 70 constitute a 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 dimension, and the foamed heat insulating materials 71a to 71d are set to have substantially the same thickness dimension, but the foaming thereof. The thickness dimensions of the heat insulating materials 71a to 71d are set to be equal to or less than the thickness dimensions of the vacuum heat insulating panels 66 to 70, for example, substantially the same.

Further, in the heat insulating box body 1, as shown in FIG. 1, a corner portion formed by the left side plate 50 and the back plate 54 of the outer box 2, a rear surface portion of the vacuum heat insulating panel 66, and a left side surface portion of the plate vacuum heat insulating panel 70. The space formed by the chamfered portion 61 of the inner box 3 is filled with the foamed heat insulating material 71e having a thickness larger than that of the foamed heat insulating materials 71a to 71d, and the corner portion formed by the right side plate 51 and the back plate 54. The space formed by the rear surface portion of the vacuum insulation panel 67, the right surface portion 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 materials 71a to 71d. The foamed heat insulating material 71f is filled. 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 The space portion formed by is filled with 71 g of a foamed heat insulating material having a thickness larger than that of the foamed heat insulating materials 71a to 71d, and a corner portion formed by the bottom plate 53 and the back plate 54 and a lower surface portion of the vacuum heat insulating panel 70. The space formed by the stepped portions 53a and 59a is filled with the foamed heat insulating material 71h having a thickness larger than that of the foamed heat insulating materials 71a to 71d. Then, between the vacuum heat insulating 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 which is pressed against the vacuum heat insulating panel 70, between the left side plates 50 and 56 or the right side plate 51. The foamed heat insulating material 71i is filled by the foamed heat insulating material rising between 57 and flowing into the plurality of recesses 64 (see FIG. 1), so that the surface of the vacuum heat insulating panel 70 is made of the inner box 3 by the foamed heat insulating material 71i. It is adhered to the outer surface (back surface) of the back plate 60 of.

In the above case, in the heat insulating box 1, from the left side heat insulating wall composed of the left side plates 50 and 56, the vacuum heat insulating panel 66 and the foamed heat insulating material 71a, and from the right side plates 51 and 57, the vacuum heat insulating panel 67 and the foamed heat insulating material 71b. Right side heat insulating wall, top heat insulating wall made of top plates 52, 58, vacuum heat insulating panel 68 and foam heat insulating material 71c, and bottom heat insulating wall made of bottom plates 53, 59, vacuum heat insulating panel 69 and foam heat insulating material 71d. Consists of a side heat insulating wall which is a 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. In the left heat insulating wall and the right heat insulating wall, foam heat insulating materials 71a and 71b exist between the inner box 3 and the corresponding surfaces of the vacuum heat insulating panels 66 and 67, and the top heat insulating wall and the bottom heat insulating wall and the bottom heat insulating wall are provided. On the wall, foam insulation 71c and 71d exist between the outer box 2 and the back surfaces of the corresponding vacuum insulation panels 68 and 69, whereas on the back insulation wall, the inner box 3 and the corresponding vacuum insulation panel The surfaces of 70 are in contact with each other, and only a partially adhesive foam insulating material 71i is present between them. Therefore, in the back heat insulating wall, the area of the vacuum heat insulating panel 70 on the front surface corresponding to the inner box 3 and the back surface corresponding to the outer box 2 without the foamed heat insulating material is the left side heat insulating wall and the right side heat insulating wall which are other side heat insulating walls. It is set to be wider than that of walls, top insulation walls and bottom insulation walls. 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: left insulation wall, right insulation wall, top insulation wall and bottom insulation wall. It is significantly less.

Further, in the above case, in the heat insulating box body 1, chamfered portions 62 and 63 are formed in the corner portion formed by the right side plate 57 and the back plate 60 of the inner box 3 and the corner portion formed by the top plate 58 and the back plate 60. A space is created outside the chamfered portions 62 and 63 by the amount that the chamfered portions 62 and 63 project inward of the inner box 4, and this becomes a storage recess, and the foamed heat insulating materials 71f and 71 g are also provided here. It is filled and its thickness is increased, and in this embodiment, as shown in FIGS. 1 and 2, the pipe body 65 is embedded in the portion of the foamed heat insulating material 71f and 71g, and FIG. As shown in the above, the refrigerating side drain hose 34 is embedded in the foamed heat insulating material 71f portion.

As described above, according to the first embodiment, the vacuum heat insulating 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 between the outer box 2 and the inner box 3. When the undiluted solution of the foamed heat insulating material was injected and filled with foam, the foamed heat insulating material was hardly inflowed and 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 was placed on the back. It is not necessary to inject a stock solution having a foaming ratio higher than that required to obtain a foaming pressure that flows between the plate 54 and the back plate 60, and the amount of the foamed heat insulating material used can be reduced.

Further, the back plate 60 of the inner box 3 is formed with a plurality of recesses 64 protruding inward, and the foamed heat insulating material is allowed to flow into these recesses 64 to fill the foamed heat insulating material 71i. The vacuum insulation panel 70 can be adhered to the back plate 60 of the inner box 3 using the insulation 71i as an adhesive, and therefore the insulation panel 70 can be attached to the back plate 60 of the inner box 3 before the foam filling of the foam insulation. It is not necessary to keep it glued to the box, which 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 (the width of the groove through which the foamed heat insulating material flows) is narrow, the foamed heat insulating material 71i can be sufficiently inflowed and filled. Can be done.

Then, chamfering portions 62 and 63 are formed in the corner portion formed by the right side plate 57 and the back plate 60 of the inner box 3 and the corner portion formed by the top plate 58 and the back plate 60, and are outside the chamfered portions 62 and 63. A storage recess is formed in the space, and the foamed heat insulating materials 71f and 71g are also filled therein to increase the thickness, and the pipe body 65, which is a pipe for connection, is formed in the increased foamed heat insulating materials 71f and 71g. Since the drainage hose 34 on the refrigerated side, which is a pipe for drainage, is buried in the foamed heat insulating material 71f portion, the outer surface side of the back plate 60, which is a portion close to the vacuum heat insulating panel 70 of the back plate 60, that is, the outside. It is no longer necessary to arrange the pipe body 65 and the cold storage side drain hose 34 between the back plate 54 of the box 2 and the back plate 60 of the inner box 3, and the back plate 54 of the outer box 2 and the back plate 60 of the inner box 3 are eliminated. A vacuum heat insulating panel 70 having a small thickness can be easily arranged between the two.

(Second embodiment)
6 and 7 show a second embodiment, and the parts different from the first embodiment will be described below.
In this second embodiment, the back plate 60 of the inner box 3 is not formed with a plurality of recesses 64 (see FIG. 6). That is, in this second embodiment, the vacuum heat insulating panel 70 is adhered to the back plate 60 of the inner box 3 before foam filling of the foamed heat insulating material.

Specifically, the vacuum heat insulating panel 70 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, and then the back plate 54 is on the front side of the vacuum heat insulating panel 70. As shown in FIG. 7, a hot melt is applied as an adhesive to the surface (upper surface in FIG. 7) of the vacuum heat insulating panel 70 by a roll coater 72.

The roll coater 72 applies hot melt to the coating roll 73, which is in contact with the surface of the vacuum heat insulating panel 70 to apply hot melt, the backup roll 74, which is in contact with the outer surface (lower surface in FIG. 7) of the back plate 54, and the coating roll 73. The pickup roll 75 to be supplied is rotatably supported by a support (not shown), and the back plate 54 is moved to the right in FIG. 7 to hot melt the surface of the vacuum insulation panel 70. Is applied. In this case, the height dimension (protruding dimension) Lb of the flange portions 54a and 54b of the back plate 54 is the height dimension of the vacuum heat insulating panel 70 (thickness dimension of the vacuum heat insulating panel 70 + plate thickness dimension of the back plate 54) La. It is set to be smaller (Lb <La) so that when the back plate 54 is moved, the flange portions 54a and 54b are prevented from coming into contact with the coating roll 73 and being damaged.

Thus, in this second embodiment, the back plate 54 having the vacuum heat insulating panel 70 whose surface is coated with hot melt as described above has the flange portions 54a and 54b as 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 and engaged with the portions 50b and 51b, the front surface side of the vacuum heat insulating panel 70 is pressed against the back 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 foamed heat insulating material is injected between the outer box 2 and the inner box 3 to foam the foam. Until then, the inner box 3 has a flange of the front opening with respect to the outer box 2. Since the portions 56a and 57a are in an unstable state in which they are simply inserted and engaged with the flange portions 50a and 51a and attached to the flange portions 50a and 51a, the inner box 3 having a weak mechanical strength may 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 the vacuum heat insulating panel 70 adhered to both of them so that the strength of the inner box 3 is increased. Therefore, the inner box 3 is not deformed even if there is a 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 heat insulating 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 flange portions 56a and 57a of the front opening are in an unstable state in which they are simply inserted and engaged with the flange portions 50a and 51a, the vacuum insulation panel 70 is placed in the normal position of the back plate 60 of the inner box 3. It is uncertain whether it will be glued. Assuming that the inner box 3 is deviated from the normal position and the vacuum insulation panel 70 is adhered to a position deviated from the normal position of the back plate 60 of the inner box 3, foaming is performed between the outer box 2 and the inner box 3. When the foaming jig is fitted into the inner box 3 to inject the undiluted solution of the heat insulating material and fill it with foam, the inner box 3 is forcibly moved to the normal position by this, so that it is outside via the foamed heat insulating panel 70. Stress acts on the box 2 and the inner box 3, and as a result, the inner box 3 having a weak mechanical strength may be wrinkled or distorted.

On the other hand, in the second embodiment, the chamfered portions 61, 62 and 63 are provided at the corners formed by the back plate 60 of the inner box 3 and the left side plate 56, the right side plate 57 and the top plate 58 connected thereto. Since it is formed, the stress caused by the adhesive misalignment of the vacuum heat insulating panel 70 as described above is absorbed by the chamfered portions 61, 62, 63 to prevent 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 parts different from the first embodiment will be described below. In the following description, FIG. 2 will also be referred to for convenience of description.
In this third embodiment, as in the second embodiment, the back plate 60 of the inner box 3 is not formed with a plurality of recesses 64. Instead, the back plate 60 of the inner box 3 is formed with a storage recess 76 that is located on the back side of the refrigerating side cooler chamber 32 that functions as a ventilation duct and projects inward of the inner box 3. The storage recess 76 is formed so as to extend horizontally from the central position above and below the back plate 60 to the position of the chamfered portion 62. Further, the back plate 60 of the inner box 3 is formed with a storage recess 77 that is located on the back side of the lower portion near the refrigerating side cooler chamber 32 and projects inward of the inner box 3. The storage recess 77 is also formed so as to extend horizontally from the central position above and below the back plate 60 to the position of the chamfered portion 62.

Then, the pipe body 65 is led out from the central position of the back plate 60 of the inner box 3 into the storage recess 76, and is guided along the inside of the storage recess 76 to the outer surface of the chamfered portion 62, and thereafter, the chamfered portion 62. Guided upward along the outer surface of the chamfered portion 63, guided in the direction of 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, and thus arranged in a gate shape. NS. Further, 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, and is guided along the inside of the storage recess 77 to the outer surface of the chamfered portion 62, and then chamfered. It is guided downward along the outer surface of the portion 62.

After that, the vacuum heat insulating panel 70 is adhered to the back plate 60 of the inner box 3 in the same manner as in the second embodiment, but the pipe body 65 which is a pipe and the refrigerating side drain hose 34 are the storage recess 76 and the storage recess 76. Since it is housed in the 77, the vacuum heat insulating panel 70 does not ride on the pipe body 65 and the refrigerating side drain hose 34 and float. After that, the undiluted solution of the foamed heat insulating material is injected between the outer box 2 and the inner box 3 to be foam-filled. The pipe body 65 and the refrigerating side drain hose 34 are embedded in the foam insulation material.

According to this third embodiment, there is a structural or technical reason that the pipe body 65 and the refrigerating side drain hose 34 have to be led out from the central portion of the back plate 60 of the inner box 3 to the outside of the inner box 3. Even in this case, the storage recesses 76 and 77 protruding inward are formed in the back plate 60 of the inner box 3, 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 heat insulating panel 70 is adhered to the bottom plate of the inner box 3, the vacuum heat insulating panel 70 can be prevented from being deformed by riding on the pipe body 65 and the refrigerating side drain hose 34 and floating. It does not adversely affect the insulation performance of the heat insulating panel 70.

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

As shown in FIG. 2, in the inner part of the freezing chamber 7, a freezing side cooler chamber 38 that also serves as a blower duct is provided in which a freezing cooler 18 and a freezing side blower fan 39 are arranged. As shown in 9, the left and right ends of the freezing side cooler chamber 38 are waste spaces (dead spaces) in which food cannot be stored. In this fourth embodiment, the inner box 3 is placed on the back plate 60 of the inner box 3 in order to utilize the dead space on the right side of the dead space on the left and right ends of the freezing side cooler chamber 38. A storage recess 78 protruding into the shape is formed.

Then, the refrigerating side capillary tube 25 and the refrigerating side suction pipe 28 connected to the refrigerating cooler 18 are led out from the inner box 3 into the storage recess 78, and are brazed to each other, for example, and integrated so as to be heat exchangeable. The pipe body 79, which is a pipe for connection, is formed. Further, as shown in FIG. 10, the pipe body 79 is arranged so as to be oriented downward after being bent twice in a U shape in the storage recess 78.

Then, as in the second embodiment, the vacuum heat insulating panel 70 is adhered to the back plate 60 of the inner box 3, and then the undiluted solution of the foamed heat insulating material is injected between the outer box 2 and the inner box 3. 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 this fourth embodiment, the storage recess 78 is formed so as to project into one of the dead spaces generated on the left and right ends of the freezing side cooler chamber 38 in the freezing chamber 7. Since the pipe body 79 is stored and arranged in the storage recess 78, the pipe body 79 can be arranged by skillfully utilizing the dead space in the freezing chamber 7.

(Fifth Embodiment)
11 and 12 show a fifth embodiment, and the parts different from the first embodiment will be described below. In the fifth embodiment, as in the second embodiment, the back plate 60 of the inner box 3 is not formed with a plurality of recesses 64.

In the fifth embodiment, unlike the first embodiment, the step portions 53a and 59a are not formed on the bottom plate 53 of the outer box 2 and the bottom plate 59 of the inner box 3, and instead, the outer box 2 is formed. A step 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 serves as a storage recess that protrudes inward of the inner box 3 corresponding to the step portion 52a of the top plate 52. The 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 in the horizontal portion of the outer surface of the stepped portion 58a in the direction of the left side plate 56, and further. It is U-turned and guided in the direction of the right side plate 57, is U-turned again and guided in the direction of the left side plate 56, and is arranged so as to face upward in the vicinity of the left side plate 56. That is, the pipe body 65 is arranged in a U shape for two turns in the horizontal portion of the step portion 58a.

Then, as in the second embodiment, the vacuum heat insulating panel 70 is adhered to the back plate 60 of the inner box 3, and then the undiluted solution of the foamed heat insulating material is injected between the outer box 2 and the inner box 3. As shown in FIG. 11, the foamed heat insulating material 71 g is also filled between the stepped portion 52a of the top plate 52 and the stepped portion 58a of the top plate 58, and the pipe body 65 is filled with the foamed heat insulating material 71 g. It will be buried in.

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

According to the fifth embodiment, in the case of a refrigerator in which the compressor 20 is arranged on the upper part of the heat insulating box 1, the outer box 2 is formed to form a machine room 19 for arranging the compressor 20 and the like. Since the stepped portions 52a and 58a are formed on the top plate 52 and the top plate 58 of the inner box 3, the pipe body 65 is arranged and stored by utilizing the space portion inevitably formed between the stepped portions 52a and 58a. Is what you do.

(Sixth Embodiment)
FIG. 13 shows a sixth embodiment, and the parts different from the fifth embodiment will be described below.
In the fifth embodiment, the pipe body 65 is arranged in a U shape for two turns on the horizontal portion of the step portion 58a on the top plate 58 of the inner box 3, but in the sixth embodiment. , The pipe body 65 is arranged in a U-shape for one turn in the horizontal portion of the step portion 58a, further shifts to the vertical portion of the step portion 58a and is arranged in a U-shape for two turns, and then points upward. It is arranged to do.

According to the sixth embodiment, the length of the pipe body 65 formed by integrating the refrigerating side capillary tube 24 and the refrigerating side suction pipe 27 (see FIG. 3) in a heat exchangeable manner is larger than that of the fifth embodiment. Therefore, 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.

(7th Embodiment)
FIG. 14 shows a seventh embodiment, and the parts different from the fifth embodiment will be described below.
In the fifth embodiment, the pipe body 65 is arranged in a U-shape for two turns on the horizontal portion of the stepped portion 58a on the top plate 58 of the inner box 3 (see FIG. 12 for both). In the seventh embodiment, the pipe body 65 is spirally arranged in the horizontal portion of the step portion 58a, and then is pulled out from the central portion thereof and is directed upward. A plurality of spiral portions of the pipe body 65 may be provided so as to be juxtaposed with the horizontal portion of the step portion 58a, or may be provided also with the vertical portion of the step portion 58a.

(Other embodiments)
In the first to third embodiments, the pipe body, which is a pipe in which the refrigerating side capillary tube 25 and the refrigerating side suction pipe 28 are integrated so as to be heat exchangeable, is a stepped portion 59a as a storage recess of the bottom plate 59 of the inner box 3. It may be configured to be stored and arranged on (outer surface side).
The first to third embodiments may be combined with the fourth embodiment.
The first to seventh embodiments are cases where they are applied to a refrigerator, but can be applied to all those using a heat insulating box, for example, they may be applied in a showcase.

As described above, according to the heat insulating box body of the present embodiment, the outer box having the left side plate, the right side plate, the top plate, the bottom plate and the back plate, and the left side plate of the outer box arranged in the outer box. An inner box having a left side plate, a right side plate, a top plate, a bottom plate and a back plate corresponding to a right side plate, a top plate, a bottom plate and a back plate, and arranged between the back plate of the inner box and the back plate of the outer box. It is provided with a vacuum heat insulating panel that is formed to form a back heat insulating wall, and a foam heat insulating material that is filled between the inner box and the outer box to form a side heat insulating wall. Then, the area of the back heat insulating wall without the foamed heat insulating material on the front surface corresponding to the inner box and the back surface corresponding to the outer box of the vacuum heat insulating panel is set to be wider than that of the side heat insulating wall. ing. As a result, it is possible to reduce the amount of the foamed heat insulating material used in the heat insulating box body in which the foamed heat insulating material and the vacuum heat insulating panel are used in combination.

Although some 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 implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

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

Claims (2)

An outer box with a left side plate, a right side plate, a top plate, a bottom plate and a back plate,
An inner box arranged in the outer box and having a left side plate, a right side plate, a top plate, a bottom plate and a back plate corresponding to the left side plate, a right side plate, a top plate, a bottom plate and a back plate of the outer box, and
A vacuum insulation panel arranged between the inner box and the outer box and adhered to the inner box,
A foam insulating material filled between the inner box and the outer box is provided.
At the corner on the back side formed by the side plate and the back plate of the inner box, a refrigerant is provided so as to project inward of the inner box at a position facing the vacuum heat insulating panel, and a refrigerant connecting the parts inside the heat insulating box flows. A heat insulating box body in which a chamfered portion connected to a storage recess for storing a pipe is formed, and the pipe is arranged along the chamfered portion so as to be led out into the storage recess and communicate with the inside of the inner box. The heat insulating box body according to claim 1, wherein the pipe is arranged in a state of being in contact with the outer surface of the inner box.

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