JPH10253246A - Heat insulating box and its manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a smooth and excellent filling of foamed heat insulating material to be carried out by a method wherein there are provided an outer box and an inner box, vacuum heat insulating material fixed to a surface of the outer box facing against the inner box, foamed heat insulating material is filled between both boxes at site through foam generating system and the inner box is formed with an air vent hole for filling the foamed heat insulating material. SOLUTION: When a heat insulating box 6 of a refrigerator is to be assembled, at first, each of vacuum heat insulating materials 73 is adhered to each of positions at the inner surface of an outer box 2, then an inner box 3 is assembled into the outer box 2, covered to a jig in the foamed material below the box 6 and then a jig outside the foamed material is covered from an outside part of the outer box 2. Under this state, raw liquid of polyurethane is fed through urethane feeding ports 75, 75, filled between both boxes 2, 3 and as the raw liquid is grown, air between both boxes 2 and 3 is discharged through air drain holes 76... of the outer box 2 and then the air is discharged through air drain holes 77... formed at the inner box 3 below vacuum heat insulating material 73. With such an arrangement as above, irrespective of the fact that the vacuum heat insulating material 73 is fixed, it becomes possible to perform an air vent opeartion and then both foaming and filling of uniform density are realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated box body in which a vacuum heat insulating material is attached to an inner box side of an outer box, and a foamed insulating material is filled between the outer box and the inner box by an in-situ foaming method. The present invention relates to a manufacturing apparatus.

[0002]

2. Description of the Related Art Conventionally, this kind of household refrigerator is constituted by a heat insulating box body in which a foam heat insulating material such as polyurethane foam is filled between a steel sheet outer box and a hard resin inner box by an in-situ foaming method. By partitioning the inside of the heat insulation box (inside the refrigerator), a freezing room cooled to a freezing temperature such as -20 ° C, a refrigerated room maintained at a refrigerated temperature such as + 5 ° C, and drying of vegetables and the like can be performed. Vegetable room for storing foods you dislike is formed.

[0003] In particular, in recent years, refrigerators have been developed in which a refrigerator compartment and a vegetable compartment, where food is frequently delivered, are arranged above, and a freezer compartment for long-term storage is arranged at the bottom of the refrigerator. .

In recent years, it has become necessary to reduce the wall thickness of the heat-insulating box in order to reduce the installation space of the refrigerator or to prevent the expansion of the refrigerator while expanding the effective volume in the refrigerator. For example, JP-B-61-17263 (B32B5 / 18) and JP-B-63-35911 (F25D23 / 06), or JP-B-2-544.
No. 79 (F16L59 / 06) has come to use a vacuum heat insulating material.

[0005] This vacuum heat insulating material is provided in a bag formed by welding the periphery of a film (gas barrier film) having a multilayer laminate structure for preventing gas (such as air) from permeating, into a fine powder of silica, pearlite, etc., and a glass. After inserting a heat insulating material made of fiber or open-cell foamed polyurethane, the gas in the bag is evacuated and sealed in a vacuum state.

According to such a vacuum heat insulating material, 0.005 to
Since a thermal conductivity of 0.010 Kcal / mh ° C. is achieved, the wall thickness of the heat insulating box can be reduced by mounting it on the inner surface of the outer box (surface on the inner box side) around the freezing room where low temperature is required. In addition, it is possible to effectively reduce heat that enters the freezer compartment from outside the outer box.

[0007]

By the way, when manufacturing the heat insulating box of the refrigerator, first, the inner box is assembled into the outer box to which the vacuum heat insulating material is attached in advance, and then the front opening is turned down. The jig is placed on the inner foam jig, and the outer jig is addressed from the outside. In this state, the polyurethane undiluted solution is injected from an inlet formed in the left and right of the back plate of the outer box, for example, in the vertical direction, and is filled by reaction growth (foaming) / solidification between the two boxes. In the process of growth at this time, the air between the two boxes must be released outside the two boxes.

Conventionally, air vent holes for this purpose are generally formed at appropriate places on the back plate of the outer box, which is the final stage of foaming, but are provided on the inner surface of the back box of the outer box, which is behind the freezer compartment. If the vacuum heat insulating material is attached, air can not be released when the foam heat insulating material is filled, and there is a problem that an unfilled portion or a portion having a low density and insufficient strength occurs at this portion.

The present invention has been made to solve the above-mentioned conventional technical problem. Even when a vacuum heat insulating material is attached to the inner surface of an outer box, the foam heat insulating material can be smoothly and satisfactorily filled. And a device for manufacturing the same.

[0010]

The heat insulating box of the present invention includes an outer box, an inner box, and a vacuum heat insulating material attached to a surface of the outer box on the inner box side. The material is filled by an in-situ foaming method, and an inner box is provided with an air vent hole for filling a foamed heat insulating material.

According to the present invention, there is provided an outer box, an inner box, and a vacuum heat insulating material attached to a surface of the outer box on the side of the inner box. In the heat-insulating box body formed as described above, since the air vent hole for filling the foam heat-insulating material is formed in the inner box, the vacuum heat-insulating material is attached to the inner-box-side surface of the outer box. Air can be removed during the reactive growth of the foamed insulation material through the air vent holes, effectively eliminating the unfilled and low-density parts of the foamed insulation material and achieving uniform density foam filling. Is what you can do.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing an insulated box.
An inner foaming jig which comes into contact with the inner box when filling the foamed heat insulating material is provided. The inner foaming jig is formed with an air vent passage communicating with the air vent hole at a position corresponding to the air vent hole of the inner box. Is what it is.

According to the second aspect of the present invention, there is provided an inner foaming jig which comes into contact with the inner box when the foamed heat insulating material is filled, and the inner foaming jig is provided at a position corresponding to an air vent hole of the inner box. Since the air vent passage communicating with the air vent hole is formed, the exhaust from the air vent hole formed in the inner box is smoothly performed, and the filling of the foamed heat insulating material can be performed more uniformly and favorably. .

[0014]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a refrigerator 1 as an embodiment to which the present invention is applied, FIG. 2 is a front view of the refrigerator 1 without a door, FIG. 3 is a longitudinal side view of the refrigerator 1, and FIG. 5 is another longitudinal side view of the refrigerator 1, FIG. 6 is a sectional view taken along line AA of FIG. 5, FIG. 7 is a sectional view taken along line BB of FIG.
FIG. 8 is a sectional view taken along line CC of FIG. 6, and FIG. 9 is a perspective exploded perspective view of the refrigerator 1.

The refrigerator 1 of the present invention comprises a heat-insulating box 6 formed by filling a foamed polyurethane heat-insulating material 4 between an outer box 2 made of a steel plate opening forward and an inner box 3 made of a hard resin by an in-situ foaming method. The interior of the heat-insulating box 6 is vertically partitioned by a partition plate 7 provided at a substantially central portion,
The upper part of the partition plate 7 is a refrigerating room 8 maintained at a refrigerating temperature (about + 5 ° C.).

The lower part of the partition plate 7 is further vertically divided by a heat insulating partition wall 9 having a substantially L-shaped cross section and containing a vacuum heat insulating material. The space between the heat insulating partition wall 9 and the partition plate 7 is used for drying vegetables and the like. A vegetable compartment 17 for storing disliked food, and a freezer compartment 18 in which the lower part of the heat insulating partition wall 9 is cooled to a freezing temperature (about −20 ° C.).
And

The refrigerator compartment 8 has a plurality of upper and lower shelves 21.
・ The ice temperature (0 ° C to -3
(° C.) is formed. Also,
The front opening of the refrigerator compartment 8 is closed by a pivotable door 23 so as to be openable and closable.

Further, the refrigerator compartment duct 2 is provided at the back of the refrigerator compartment 8.
4 are formed vertically, and on the left and right sides thereof, a plurality of refrigerator air outlets 26 communicating with the upper end of the refrigerator compartment 24 and the refrigerator 8 are formed vertically. Further, an ice greenhouse cold air discharge port 25 is formed inside the ice greenhouse 22, and a cold storage room cool air return port 27 is formed at the back and bottom (partition plate 7).

A vegetable compartment cool air discharge port 31 communicating with the refrigerator compartment cool air return port 27 is formed at the upper back of the vegetable compartment 17, and a vegetable compartment cool air return port 32 is further formed at the upper right back side. . The front opening of the vegetable compartment 17 is openably and closably closed by a drawer-type door 33, and the door 33
A vegetable container 34 having an opening on the upper surface is attached to the back surface of the container, and the vegetable container 34 is disposed in the vegetable compartment 17 to store vegetables.

A cooling chamber 37 is defined at the back of the freezing chamber 18 by a partition plate 36, and extends from the back of the freezing chamber 18 to the back of the heat insulating partition wall 9.
In the cooling chamber 37, a cooler 38 constituting a cooling device is installed vertically, and a blower 39 is installed in the cooling chamber 37 above the cooler 38. Incidentally, 41
Denotes a defrost heater of the cooler 38.

The front opening of the freezer compartment 18 is closed by two drawer-type doors 42, 43 which are openable and closable, and containers 44, 46 having upper surfaces respectively opened on the back surfaces of the doors 42, 43. Attached, this container 44,
Reference numerals 46 are arranged above and below the freezer compartment 18 to store frozen food, ice cream, and the like.

The partition plate 36, the cooler 38 and the blower 3
A cooling air distribution duct 47 is formed between the cylinders 9, and freezing room cold air discharge ports 48, 49 communicating with the duct 47 and the freezing room 18 are formed in the partition plate 36 at the upper back of the containers 44, 46. Open correspondingly. In addition, a freezer compartment cool air return port 51 communicating with a lower portion of the cooling compartment 37 is formed behind the container 46.

At the upper part of the duct 47, a cool air distribution port 52 is formed on the side of the blower 39.
2 communicates with the lower end of the refrigerator compartment duct 24. In addition, beside the cooler 38, a cold air return duct 53 is provided in the refrigerator compartment / vegetable compartment.
The upper end of which is formed in the vegetable compartment cool air return port 3
The lower end thereof communicates with the inside of the cooling chamber 37 through a cold air return port 54 for opening the refrigerator compartment / vegetable compartment opened at the lower part of the cooling compartment 37. In FIG. 2, the heat insulating partition wall 9 and the partition plate 36 are removed.

On the other hand, the bottom wall 6A of the heat-insulating box 6 is formed such that the rear portion rises in a stepped manner, and a machine room 56 is formed outside the rear portion of the bottom wall 6A. This machine room 56
Inside, a compressor 57, an evaporating dish condenser 58, and a main condenser 59 constituting a cooling device are installed. In addition, since the bottom wall 6A has such a shape, the bottom of the freezing compartment 18 also has a shape in which the rear rises, so that the rear surface of the lower container 46 is located forward of the rear surface of the upper container 44. Becomes The cooler 38 is located above the raised bottom wall 6A.

On the other hand, a high-temperature refrigerant pipe 61 is alternately provided (attached) to the inner surface of the outer box 2 in a heat-exchange manner, and a high-temperature refrigerant pipe 62 is also provided on the inner surface of the outer box 2 located at the periphery of the opening of the heat insulating box 6. Have been. The discharge side of the compressor 57 is connected to the evaporating dish condenser 58, and the outlet of the evaporating dish condenser 58 is connected to the main condenser 59. The outlet of the main condenser 59 is connected to the high-temperature refrigerant pipe 61,
Is connected to a high-temperature refrigerant pipe 62 around the opening. The high-temperature refrigerant pipe 62 is connected to the cooler 38 via a capillary tube (not shown), and the outlet of the cooler 38 is connected to the suction side of the compressor 57.

With this configuration, when the compressor 57 is operated,
A high-temperature and high-pressure gas refrigerant is discharged from the compressor 57, flows into the evaporating dish condenser 58 and the main condenser 59 in order, releases heat, and is condensed. The refrigerant flowing out of the main condenser 59 flows into the high-temperature refrigerant pipe 61 to further radiate heat, and then flows into the high-temperature refrigerant pipe 62 to heat the periphery of the opening. Thereby, dew condensation on the periphery of the opening is eliminated.

The refrigerant flowing out of the high-temperature refrigerant pipe 62 is decompressed by the capillary tube, enters the cooler 38 and evaporates. At this time, heat is taken from the surroundings, and the air in the cooling chamber 37 is cooled. The refrigerant exiting the cooler 38 is again supplied to the compressor 5
It is sucked into 7.

As described above, the cool air cooled by the cooler 38 is sucked by the operation of the upper blower 39 and is blown out to the front distribution duct 47. The cool air blown out to the distribution duct 47 flows from the cool room discharge ports 48 and 49 to the freezer room 18.
Is discharged into each of the containers 44 and 46 and cooled to a freezing temperature of about −20 ° C. The cool air in the freezer compartment 18 returns from the freezer cool air return port 51 into the cooling compartment 37 on the suction side of the cooler 38.

The cold air blown out to the distribution duct 47 also flows into the refrigerator compartment duct 24 from the cool air distribution port 52 and rises there. Then, from each of the refrigerator compartment cold air discharge ports 26. It is discharged into the refrigeration room 8 and the ice temperature room 22. A not-shown damper that opens and closes at the temperature in the refrigerator compartment 8 is provided in the refrigerator compartment duct 24, whereby the refrigerator compartment 8 is maintained at a refrigerator temperature of about + 5 ° C. Is maintained at an ice temperature of about 0 ° C. to −3 ° C.

The cool air circulated in the chambers 8 and 22 flows into the cold room return port 27 and enters the vegetable room 17 from the vegetable room cool air discharge port 31 and the like, and keeps the inside of the vegetable room container 34 cool from the surroundings. Then, the cool air circulated in the vegetable room 17 flows into the cool room / vegetable room cool air return duct 53 from the vegetable room cool air return port 32, flows down there, and returns to the cool room / vegetable room cool air return port 54.
It returns to the cooling chamber 37 on the suction side of the cooler 38.

On the other hand, vacuum heat insulating materials 71, 71 are attached to the inner surfaces of the side plates 2A, 2A of the outer box 2 corresponding to both sides of the freezing room 18, and the bottom plate of the outer box 2 corresponding to the lower part of the freezing room 18. A vacuum heat insulating material 72 is also attached to the inner surface of 2B,
It is embedded in the heat insulating material 4. The vacuum heat insulating material 73 is also attached to the inner surface of the back plate 2C of the outer box 2 corresponding to the rear of the freezing room 18 behind the cooling room 37, and is buried in the heat insulating material 4.

Each of the vacuum heat insulating materials 71, 72 and 73 is formed by folding a gas barrier film in which a heat-welding layer made of, for example, polyethylene or polypropylene, an aluminum layer and a surface protective layer are laminated from the inside, and bringing two sides into close contact with each other. Are welded to each other to form a bag, and in that state, a fine powder such as silica or pearlite, and a core material made of glass fiber or open-cell foamed polyurethane heat insulating material are inserted, and a predetermined vacuum exhaust device is inserted. After the gas in the bag is evacuated to a vacuum state, the heat-welding layers on the other side are mutually welded and sealed.

Of these, the upper portions of the vacuum heat insulating materials 71, 71 located on both sides of the freezing compartment 18 are provided with the vegetable compartment 1 as shown in FIG.
7, the lower end edge 71A of the vacuum heat insulating material 71, 71 has an inclined shape in which the rear portion gradually rises at a predetermined angle from the front portion. Thereby, the lower end edge 71A of the vacuum heat insulating material 71 has a shape similar to the shape of the bottom wall 6A, and the vacuum heat insulating materials 71, 71 cover substantially the entire area from the front part to the rear part of the bottom of the freezing chamber 18 avoiding the machine room 56. Will come to cover.

Thus, regardless of the shape of the bottom wall 6A of the heat insulating box 6 formed by the machine room 56, the vacuum heat insulating materials 71, 71 are provided.
Is attached to the bottom of the heat insulation box 6 with a large area, and the heat insulation effect can be improved. In particular, the vacuum heat insulating materials 71 and 7 are provided almost all over the side of the freezing room 18 where heat insulation is most desired.
1 can be provided, so that the wall thickness of the heat insulating box 6 is reduced to further reduce the installation space of the refrigerator 1, or to increase the effective volume, or to further increase the power consumption of the cooling device. Can be reduced.

In order to form the vacuum heat insulating material 71, the core material constituting the vacuum heat insulating material 71 also has a tapered shape, so that the work of inserting the vacuum heat insulating material 71 into the gas barrier film becomes easy, and the vacuum heat insulating material 71 itself is formed. Assembly workability is also improved.
In this case, the heat-welded portion of the gas barrier film on the tip end side where the core material becomes thinner is left in a substantially triangular shape, and this surplus portion is cut off along the shape of the core material.

Further, the vacuum heat insulating material 72 located below the freezing compartment 18 is formed stepwise along the shape of the bottom wall 6A.

On the other hand, the vacuum heat insulating material 73 located behind the freezing compartment 18 has a rectangular shape as a whole. As shown in FIG. 6, the core material has a size larger than the rear projection area of the area including the cooler 38 and the blower 39.

Here, since the core material does not exist at the peripheral portion of the vacuum heat insulating material, and only the gas barrier film is provided, heat transfer at the peripheral portion of the vacuum heat insulating material increases, and the heat insulating performance deteriorates. (This is called a heat bridge.)

On the other hand, as described above, the vacuum heat insulating material 73 is used.
If the size of the core material is larger than the rear projection area of the region including the cooler 38 and the blower 39, the temperature is the lowest such as -30 ° C to -35 ° C without being affected by the heat bridge. The heat behind the cooler 38 can be effectively insulated.

In particular, the wall thickness of the heat-insulating box 6 is reduced due to the installation of a motor and the like behind the blower 39. However, by installing the vacuum heat-insulating material 73, it is possible to prevent the heat-insulating performance from lowering. Become like

On the other hand, as shown in FIG. 9, the high-temperature refrigerant pipe 61 is provided on the left side plate 2A of the vacuum heat insulating material 71 on the left side.
The inner surface rises upward from below, bends forward in a crank shape, and then turns upward to extend rightward on the inner surface of the top plate 2D. Then, after turning downward, it is bent rearward in the shape of a crank, and descends on the inner surface of the side plate 2A behind the right vacuum insulating material 71.

The high-temperature refrigerant pipe 61 further rises from the inner surface of the back plate 2C on the side of the vacuum heat insulating material 73, bends in a meandering shape on the inner surface of the back plate 2C located above the vacuum heat insulating material 73, and then re-evacuates. The heat insulating material 73 has a shape that descends to the side.

As described above, since the high-temperature refrigerant pipe 61 is attached to the inner surface of the back plate 2C above the vacuum heat insulating material 73 attached behind the lower cooler 38 as shown in FIGS. Regardless of the presence of 71 or 73, the high-temperature refrigerant pipe 61
, The cooling capacity can be maintained by securing the heat radiation capacity (pipe length).

Next, the procedure for assembling the heat insulating box 6 of the refrigerator 1 as described above will be described. First, the vacuum heat insulators 71, 71, 72, 73 are respectively attached to the respective positions on the inner surface of the outer box 2, and the high-temperature refrigerant pipes 61, 62 are also attached to the inner surface of the outer box 2 at this time.

At this time, a substantially central left and right portion of the back plate 2C of the outer box 2 in the vertical direction (a portion located on the side of the vacuum heat insulating material 71).
As shown in FIG. 4 and FIG.
5 are formed, and a plurality of air vent holes 76 are formed at positions avoiding the vacuum heat insulating material 73.
The air vent holes 76 are closed with a nonwoven tape or the like through which air can flow from the inside. The high-temperature refrigerant pipe 61 is connected to the inlets 75 and 75 and the air vent holes 7.
It can be installed avoiding 6 ...

Further, at a position corresponding to the rear side of the cooler 38 of the inner box 3, that is, a position corresponding to the front of the vacuum heat insulating material 73, as shown in FIG.
Are formed, and the outer surface (the surface on the side of the outer box 2) of the air vent holes 77 is also closed with a nonwoven fabric tape or the like through which air can flow as described above.

On the other hand, of the inner foaming jig 78 and the outer foaming jig (not shown) used for filling the foamed heat insulating material, the air vent holes 77 of the inner box 3 of the inner foaming jig 78 are formed. As shown in FIGS. 11 and 12, a checkerboard-shaped air vent groove 79 is formed at a position where the air vent hole 77 can be covered, as shown in FIGS. Air vent hole 81 communicating with the outside of the foaming jig 78
・ ・ A plurality of holes are drilled. The air vent groove 79 and the air vent holes 81 constitute an air vent passage.

Next, when filling the foamed heat insulating material 4, the inner box 3 is incorporated into the outer box 2. At this time, the thickness of the vacuum heat insulators 71, 71 is 15 mm, the thickness of the vacuum heat insulator 73 is 20 mm, and the heat insulation thickness of the freezing compartment 18 of the heat insulation box 6 (FIG. 8) 45mm, 4 on the back wall
It is 0 mm to 50 mm. On the other hand, the heat insulation thickness of the refrigerator compartment 8 (FIG. 7) of the heat insulation box 6 is 33 mm on the side wall,
Since the thickness of the back wall is set to 30 mm to 40 mm, the thickness of the heat insulating material 4 obtained by subtracting the thickness of each vacuum heat insulating material 71 and 73 is substantially the same or similar between the freezing compartment 18 and the refrigerator compartment 8. Value.

In this state, as shown by the arrow in FIG. 11, the opening is placed on the lower side of the foam inner jig 78 with the opening facing downward, and a foam outer jig (not shown) is addressed from the outside of the outer box 2. In this state, the polyurethane stock solution is injected from the urethane inlets 75, 75 and filled between the two boxes 2, 3, and the stock solution once flows down to the lower end between the two boxes 2, 3, or while flowing down. The reaction is started and the two boxes 2 and 3 grow upward.

Both boxes 2, 3 driven by this growth
The air in between is exhausted from the air vent holes 76 of the outer box 2 via a foaming outer jig (not shown), and at a portion located below the vacuum heat insulating material 73 (below the jig set). The air exits from the air vent holes 77 formed in the inner box 3 to the foaming jig 78 side, and is exhausted to the outside through the path of the air vent groove 79 and the air vent hole 81.

As described above, according to the present invention, since the air vent holes 77 are formed in the inner box 3, the inner box 3 side is formed despite the vacuum heat insulating material 73 being attached to the inner surface of the outer box 2. Of the foamed heat insulating material 4 during the reactive growth of the foamed heat insulating material 4 can be performed from the air vent holes 77.
This effectively eliminates the occurrence of unfilled portions and low-density portions, and makes it possible to achieve foam filling with uniform density.

The thickness of the heat insulating material 4 minus the thickness of the vacuum heat insulating materials 71 and 73 is substantially the same or similar between the freezer compartment 18 and the refrigerator compartment 8 as described above. Therefore, the polyurethane stock solution, which grows by reaction, can be evenly circulated between the two boxes 2 and 3 so that the heat insulating material 4 can be almost uniformly filled in each part of the heat insulating box 6. It becomes.

A rear plate (not shown) (not shown) of the cooler 38 is attached to the front of the air vent holes 77 of the inner box 3 after the heat insulating box 6 is completed, and is concealed. A cooler 38 will be attached.

[0054]

As described above in detail, according to the present invention, there are provided an outer box, an inner box, and a vacuum heat insulating material attached to the inner box side surface of the outer box, and a foam heat insulating material between the two boxes. In an insulated box body filled with a foam in-situ method, an air vent hole for filling the foamed heat insulating material is formed in the inner box, so that the vacuum heat insulating material is attached to the inner box side surface of the outer box. Nevertheless, it is possible to bleed air during the reactive growth of foam insulation from the air bleed hole on the inner box side, effectively eliminating the occurrence of unfilled parts and low-density parts of foam insulation, uniform This makes it possible to realize foam filling with a high density.

According to the second aspect of the present invention, there is provided an inner foaming jig which comes into contact with the inner box at the time of filling the foamed heat insulating material, and the inner foaming jig is provided at a position corresponding to the air vent hole of the inner box. Since the air vent passage communicating with the air vent hole is formed, the exhaust from the air vent hole formed in the inner box is smoothly performed, and the filling of the foamed heat insulating material can be performed more uniformly and favorably. .

[Brief description of the drawings]

FIG. 1 is a front view of a refrigerator according to an embodiment to which the present invention is applied.

FIG. 2 is a front view of the refrigerator of FIG. 1 excluding a door.

FIG. 3 is a vertical sectional side view of the refrigerator of FIG. 1;

FIG. 4 is a rear view of the refrigerator of FIG. 1;

FIG. 5 is another longitudinal side view of the refrigerator of FIG. 1;

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a sectional view taken along line CC of FIG. 6;

FIG. 9 is a perspective exploded perspective view of the refrigerator of FIG. 1;

FIG. 10 is an exploded perspective view of the heat insulating box of the present invention before filling with a foamed heat insulating material.

FIG. 11 is a view for explaining a foam insulation material filling operation of the heat insulation box of the present invention.

FIG. 12 is an enlarged perspective view of a main part of the inner foam jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Outer box 3 Inner box 4 Polyurethane insulation material 18 Freezer compartment 38 Cooler 73 Vacuum insulation material 75 Urethane inlet 77 Air vent hole 78 Foaming jig 79 Air vent groove 81 Air vent hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Junichi Todo 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hidefumi Mogi 2-chome Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. An outer box, an inner box, and a vacuum heat insulating material attached to a surface of the outer box on the inner box side, wherein a foam heat insulating material is filled between the two boxes by an in-situ foaming method. A heat insulating box, comprising: an inner box formed with an air vent hole for filling the foamed heat insulating material. 2. An inner foaming jig which comes into contact with the inner box when filling the foamed heat insulating material, and the inner foaming jig has an air vent communicating with the air vent at a position corresponding to the air vent of the inner box. The apparatus for manufacturing a heat insulating box according to claim 1, wherein a passage is formed.