JP3408101B2 - refrigerator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a heat insulating box provided with a vacuum heat insulating material between an outer box and an inner box, and a rear portion of a bottom wall of the heat insulating box rises. And a refrigerator having a machine room on the outside. 2. Description of the Related Art Conventionally, a refrigerator of this type is constituted by an insulating box body in which a heat insulating material such as foamed polyurethane is filled between a steel sheet outer box and a hard resin inner box by a foaming method in place. By dividing the inside of the heat insulation box (inside the storage),-
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 a vegetable room for storing foods such as vegetables that do not want to be dried are defined. . [0003] In particular, in recent years, refrigerators have been developed in which a refrigerator compartment and a vegetable compartment where foods are 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 core 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, if it is arranged on the inner surface of the outer box around the freezing room where low temperature is required, even if the wall thickness of the heat insulating box is thin, the freezing from outside the outer box can be achieved. It is possible to effectively reduce the heat that enters the room. [0007] In particular, the bottom wall of the heat-insulating box constituting this type of refrigerator has a shape in which the rear portion rises stepwise, and a machine room for installing equipment such as a compressor is formed outside the rising portion. Have been. Then, since the compressor and the like generate heat during operation, the temperature in the machine room becomes higher than that in other portions. Therefore, if a vacuum heat insulating material is attached also to the bottom wall of the heat insulating box, it is expected that the heat in the machine room, which tends to enter the freezer compartment from the bottom of the heat insulating box, can be effectively reduced. [0009] However, since the conventional vacuum heat insulating material has a flat plate shape, if the vacuum heat insulating material is to be disposed in the bottom wall of the heat insulating box, the shape of the bottom wall is not sufficient. A plurality of plate-shaped vacuum heat insulating materials are arranged side by side along. On the other hand, since the vacuum heat insulating material is composed of the above-described gas barrier film and the core material sealed therein, the peripheral portion is only the gas barrier film having a high thermal conductivity. Therefore, when a plurality of vacuum heat insulating materials are arranged side by side along the bottom wall, a problem that the amount of heat entering along the peripheral edge portion and invading becomes large, that is, a problem of a heat bridge occurs. The present invention has been made to solve the above-mentioned conventional technical problem, and eliminates the influence of a heat bridge of a vacuum heat insulating material and effectively reduces heat intrusion from the bottom of the heat insulating box. It is intended to provide a refrigerator that can be used. A refrigerator according to the present invention comprises a heat insulating box provided with a vacuum heat insulating material between an outer box and an inner box. A machine room is formed outside the wall, and the vacuum heat insulating material has a shape along the shape of the bottom wall of the heat insulating box and is disposed inside the bottom wall. According to the present invention, the vacuum heat insulating material is arranged in the bottom wall of the heat insulating box so as to follow the shape of the bottom wall of the heat insulating box, so that the flat vacuum heat insulating material is formed along the bottom wall of the heat insulating box. Compared to the case where a plurality of sheets are arranged side by side, the adverse effect of the so-called heat bridge, in which heat is transmitted to the peripheral portion of the vacuum heat insulating material, is reduced, and heat intrusion from the machine room outside the bottom wall of the heat insulating box body where the temperature becomes high is effectively reduced. It can be reduced. Thus, the wall thickness of the heat insulating box can be reduced to further reduce the installation space for the refrigerator, increase the effective volume, or further reduce the power consumption of the cooling device. Become like In particular, the number of vacuum insulation materials attached is reduced, so that the assembly workability is also improved. Further, in the refrigerator according to the present invention, the vacuum heat insulating material is formed by vacuum-sealing a core material in a gas barrier film, and a core material corresponding to an inner bending line at a bent portion of the vacuum heat insulating material is provided. A concave groove extending in the bending line direction is formed. According to this invention, the vacuum heat insulating material in addition to the above is constituted by a vacuum seal the core material in the gas barrier film, and a core material corresponding to the inner bend line of bending portions of the vacuum heat insulating material Has formed a groove extending in the bending line direction, so that the gas barrier film is pulled into the groove in the process of evacuation. As a result, a force is applied to the core material in a direction to close the opening of the groove, so that the core material is bent along the bending line where the groove extends. Therefore, the vacuum heat insulating material can be formed very easily along the bottom wall of the heat insulating box. Next, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a front view of the refrigerator 1 of the present invention, FIG. 2 is a front view of the refrigerator 1 without a door, FIG. 3 is a longitudinal side view of the refrigerator 1, FIG. 4 is a rear view of the refrigerator 1, and FIG. 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. 6, FIG. 8 is a sectional view taken along line CC of FIG. 6, and FIG. FIG. The refrigerator 1 of the embodiment comprises a heat-insulating box 6 formed by filling a foamed polyurethane heat-insulating material 4 by an in-situ foaming method between an outer box 2 made of a steel plate opening forward and an inner box 3 made of a hard resin. 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, and 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 21 has a plurality of shelves 21 and
・ 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 in the upper rear portion of the vegetable compartment 17, and a vegetable compartment cool air return port 32 is formed in the upper right rear portion. . 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 which constitutes a cooling device is provided vertically behind the freezing chamber 18, and a blower 3 is provided in the cooling chamber 37 above the cooler 38.
9 are installed. Reference numeral 41 denotes a defrost heater of the cooler 38. The front opening of the freezer compartment 18 is closed openably and closably by two upper and lower drawer-type doors 42 and 43, and containers 44 and 46 having upper surfaces respectively opened on the back surfaces of the doors 42 and 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 attached (attached) to the inner surface of the outer box 2, 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 63 (not shown), and the outlet of the cooler 38 is connected to the suction side of the compressor 57. In 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 distribution duct 47 on the front side. 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. After that, the cold air is discharged 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 cold air circulated in each of the chambers 8 and 22 flows into the cold room return port 27, enters the vegetable room 17 from the vegetable room cold 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 adhered 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. A vacuum heat insulating material 73 is also attached to the inner surface of the back plate 2 </ b> C of the outer box 2 corresponding to the back of the cooling room 37 behind the freezing room 18, and is embedded in the heat insulating material 4. Each of the vacuum heat insulating materials 71 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 two sides are brought into close contact with each other to bond the heat-welding layers to each other. Into a bag by welding, and in that state, a fine powder such as silica or perlite, and a core material made of glass fiber or open-cell foamed polyurethane insulation are inserted into the bag, and the bag is filled in a predetermined vacuum exhaust device. After evacuating the gas inside to a vacuum state, the remaining one side of the heat welding layer is mutually welded and sealed,
Being manufactured. 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. Further, since the vacuum heat insulating material 71 itself has such a shape, the core material constituting the vacuum heat insulating material 71 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 Also improves the assembly workability. Further, the vacuum heat insulating material 73 located behind the freezing compartment 18 has a rectangular flat plate shape as a whole. The core material includes a cooler 38 and a blower 3 as shown in FIG.
9 is larger than the rear projection area of the region including the region 9. Here, the core material does not exist at the peripheral portion of the vacuum heat insulating material, and only the gas barrier film is used. Therefore, 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, since the core material of the vacuum heat insulating material 73 has a size larger than the rear projection area of the area including the cooler 38 and the blower 39, it is not affected by the heat bridge. , -30 ° C. to −35 ° C., etc., can be effectively insulated behind the cooler 38 at the lowest temperature, and the cooling capacity and the like can be further improved. In particular, the wall thickness of the heat insulating box 6 is reduced as shown in FIGS. 3 and 5 due to the installation of a motor and the like behind the blower 39, but the vacuum heat insulating material 73 must be provided as described above. As a result, it is possible to prevent the insulation performance of the blower 39 from lowering. On the other hand, since the bottom wall 6A of the heat insulating box 6 has a stepped shape in which the rear portion rises as described above, the bottom plate 2B of the outer box 2 also has the stepped shape. In the present invention, the vacuum heat insulating material 72 located below the freezing compartment 18 also follows the shape of the bottom wall 6A as shown in FIGS.
The rear portion is formed in a stair-like shape that rises, and is attached to the inner surface (the surface on the heat insulating material 4 side) of the bottom plate 2B. This vacuum heat insulating material 72 is composed of two gas barrier films 81 each having a heat-welding layer made of, for example, polyethylene or polypropylene, and an aluminum layer and a surface protective layer laminated from the inside, like the other vacuum heat insulating materials 71 and 73. As shown in FIG. 10, the three sides are brought into close contact with each other and the heat-welding layers are welded to each other to form a bag. Similarly, in this state, fine powders of silica, pearlite, etc., and glass fibers or open-cell foamed polyurethane After inserting the core material 82 made of a heat insulating material and evacuating the gas inside the bag in a predetermined evacuation apparatus to make a vacuum state, the heat welding layers on the remaining one side are welded to each other and sealed. , Has been manufactured. At this time, the core member 82 at a position corresponding to the inner bending line (indicated by P1 and P2 in FIG. 13) of the bending portion of the step-shaped vacuum heat insulating material 72 has a direction corresponding to the bending lines P1 and P2. Crossover grooves 83 and 84 are formed. The concave grooves 83 and 84 have a shape that expands toward the opening.
The depth reaches approximately ／ of the core material 82. When the gas barrier film 81 is loaded into the vacuum exhaust device and evacuated, the gas barrier film 81 is pulled into the concave grooves 83 and 84 in the process. Due to the tension at this time, a force is applied to the core member 82 in a direction to close the openings of the concave grooves 83 and 84, so that the core member 82 follows the bending lines P1 and P2 where the concave grooves 83 and 84 extend. FIG.
It is bent stepwise as shown in FIG. Therefore, it is possible to extremely easily form the vacuum heat insulating material 72 along the bottom wall 6A of the heat insulating box 6. As described above, according to the present invention, the vacuum heat insulating material 72 is arranged inside the bottom wall 6A so as to conform to the shape of the bottom wall 6A of the heat insulating box 6, so that the bottom wall 6A of the heat insulating box 6 is formed. In comparison with the case where a plurality of flat vacuum heat insulating materials are arranged side by side, the adverse effect due to the so-called heat bridge in which heat is transmitted through the gas barrier film 81 around the vacuum heat insulating material 72 is reduced,
Heat intrusion from the machine room 56 where the temperature becomes high can be effectively reduced. Thus, the wall thickness of the heat-insulating box 6 can be reduced to further reduce the installation space of the refrigerator 1, or
The effective volume can be increased, or the power consumption of the cooling device can be further reduced. In particular, since only one vacuum heat insulating material 72 needs to be attached, operability in assembly is improved as compared with a case where a plurality of vacuum heat insulating materials are attached. On the other hand, as shown in FIG. 9, the high-temperature refrigerant pipe 61 is connected to the side plate 2A behind 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 manner 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 adhered 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 insulating materials 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, the back plate 2 of the outer box 2
Urethane injection ports 75, 75 are formed on the left and right sides of the central portion of the C, and the high-temperature refrigerant pipe 61 is attached so as to avoid this. After assembling the inner box 3 into the outer box 2, it is set in a predetermined foaming jig with the opening facing downward.
Next, a polyurethane undiluted solution is injected from the urethane injection ports 75, 75, and is filled between the two boxes 2, 3.
At this time, the thickness of the vacuum heat insulating materials 71, 71 is 15 m.
m, the thickness of the vacuum heat insulating material 73 is 20 mm, and the heat insulating thickness of the freezer compartment 18 (FIG. 8) of the heat insulating box 6 is 45 mm on the side wall and 40 mm to 50 mm on the back wall. On the other hand, the refrigerator compartment 8 of the heat insulating box 6 (FIG. 7)
The insulation thickness of the side wall is 33mm, the back wall is 30mm ~ 4mm
Since the thickness is set to 0 mm, 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 freezing compartment 18 and the refrigerating compartment 8. Therefore, the undiluted polyurethane solution that grows by reaction is also in both boxes 2,
The heat insulating material 4 turns substantially uniformly between the three, and the heat insulating material 4 is almost uniformly filled in each part of the heat insulating box 6. As described above in detail, according to the present invention, the vacuum heat insulating material is arranged in the bottom wall of the heat insulating box so as to conform to the shape of the bottom wall of the heat insulating box. Compared to the case of arranging a plurality of plate-shaped vacuum heat insulators in parallel with each other, the adverse effect of a so-called heat bridge through which heat is transmitted to the periphery of the vacuum heat insulator is reduced, and the temperature of the heat insulating box bottom wall outside increases. Heat intrusion from the machine room can be effectively reduced. Thus, the wall thickness of the heat insulating box can be reduced to further reduce the installation space for the refrigerator, increase the effective volume, or further reduce the power consumption of the cooling device. Become In particular, the number of vacuum insulation materials attached is reduced, so that the assembly workability is also improved. Further, according to the present invention, in addition to the above, the vacuum heat insulating material is formed by vacuum-sealing a core material in a gas barrier film, and further comprises a core corresponding to an inner bending line of a bent portion of the vacuum heat insulating material. Since a groove is formed in the material in the direction of the bending line, the gas barrier film is pulled into the groove during the evacuation process. As a result, a force is applied to the core material in the direction to close the opening of the groove, so that the core material is bent along the bending line where the groove extends. Therefore, the vacuum heat insulating material can be formed very easily along the bottom wall of the heat insulating box.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a refrigerator according to the present invention. FIG. 2 is a front view of the refrigerator of the present invention excluding a door. FIG. 3 is a vertical sectional side view of the refrigerator of the present invention. FIG. 4 is a rear view of the refrigerator of the present invention. FIG. 5 is another longitudinal side view of the refrigerator of the present invention. 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 the present invention. FIG. 10 is a perspective view illustrating a manufacturing procedure of the vacuum heat insulating material attached to the bottom wall of the heat insulating material. 11 is a perspective view of a core material of the vacuum heat insulating material of FIG. 12 is a side view of the vacuum heat insulating material of FIG. 10 in a state before evacuation. FIG. 13 is a longitudinal side view of the vacuum heat insulating material of FIG. 10 after evacuation. [Description of Signs] 1 Refrigerator 2 Outer box 3 Inner box 4 Polyurethane heat insulating material 6 Heat insulating box 6A Bottom wall 18 Freezer room 38 Cooler 56 Machine room 57 Compressor 72 Vacuum heat insulating material 81 Gas barrier film 82 Core materials 83, 84 concave groove

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Junichi Todo 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hidefumi Mogi 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (56) References JP-A-61-186775 (JP, A) JP-A-3-153996 (JP, A) JP-A-7-195385 (JP, A) JP-A-7-195 151297 (JP, A) JP-A-63-15074 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 23/06

Claims (1)

(57) [Claims] [Claim 1] A heat insulating box body provided with a vacuum heat insulating material between an outer box and an inner box, and a rear portion of a bottom wall of the heat insulating box rises,
In a refrigerator comprising a machine room outside the bottom wall, the vacuum heat insulating material includes a core material inside a gas barrier film.
Air-tight, and bend the vacuum insulation material
The core material corresponding to the inner bending line at the place
The vacuum heat insulating material has a shape along the bottom wall shape of the heat insulating box, and is disposed in the bottom wall.