JPH06261833A - Heating cabinet - Google Patents

Abstract

PURPOSE:To improve the thermal insulation performance and strength of adiabatic walls by providing this heating cabinet with outside surface materials, inside surface materials and middle surface materials and providing the cabinet with high-temp. resistant heat insulating materials packed between the middle surface materials and the inside surface materials and foamed heat insulating materials packed by an on-site foaming system between the middle surface materials and the outside surface materials. CONSTITUTION:An adiabatic box body 2 is provided with the outside surface materials 11 made of steel sheets, the inside surface materials 12 made of the steel sheets at prescribed spaced intervals on the inner side thereof and the middle surface materials 13 made of the steel sheets therebetween. Glass wool 14 as the high-temp. resistant heat insulating material is packed between the inside surface materials 12 and the middle surface materials 13 and foamed polyurethane 15 as the foamed heat insulating material of the on-site foaming system is packed between the middle surface materials 13 and the outside surface materials 11. A door is constituted in the same manner. The glass wool 14 has a high heat resistant temp. and is, therefore, not deformed and deteriorated even if the inside surface materials attain a high temp. The thermal insulation performance is thus greatly improved by this glass wool coupled with the foamed polyurethane 15 having a low thermal conductivity. Particularly, the foamed polyurethane 15 between the middle surface materials 13 and the outside surface materials 11 is adhered to these materials and, therefore, the strength is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cabinet for heating foods or the like at a predetermined high temperature by heating a storage chamber surrounded by a heat insulating wall.

[0002]

2. Description of the Related Art Conventionally, this type of refrigerator has a storage chamber formed in a heat-insulating box constituted by heat-insulating walls, and the storage chamber is heated by warm air from a heater or the like, for example, + 70 ° C. to +90.
It is configured to keep food or the like at a predetermined high temperature such as ° C. By the way, as the heat insulating material of the heat insulating wall, conventionally, for example, a foamed heat insulating material such as foamed polyurethane as shown in Japanese Utility Model Publication No. 46-12764 has been generally used. It is as low as + 60 ° C., and there is a problem that deformation and deterioration occur at the high temperature as described above.

Therefore, as a heat insulating material for a heat insulating wall in this kind of storage, for example, a conventional Japanese Utility Model Publication No. 44-27814 is used.
A high temperature resistant heat insulating material such as glass wool as disclosed in Japanese Unexamined Patent Application Publication No. 2004-242242 is used. This glass wool has a high heat resistance temperature, and therefore, even if the temperature in the storage chamber reaches the high temperature as described above, no inconvenience such as deformation occurs.

[0004]

However, since the high temperature resistant heat insulating material such as glass wool has a higher thermal conductivity than the foamed heat insulating material, the amount of heat radiated from the storage chamber to the outside is large, There are problems that the outer surface of the heat insulating box becomes hot and the power consumption of the heater increases. Therefore, if it is attempted to secure the same heat insulating performance as that of the foamed heat insulating material, then there arises a problem that the thickness of the heat insulating wall is expanded, and thereby the storage chamber volume is reduced. Further, since the heat insulating material such as glass wool does not have an action of adhering to the face material forming the heat insulating wall like the foam heat insulating material such as polyurethane foam, the strength of the heat insulating wall is significantly higher than that of the foam heat insulating material. There was also a problem of decline.

The present invention has been made to solve the above-mentioned conventional technical problems, and an object thereof is to improve the heat insulating performance and strength of the heat insulating wall of the refrigerator.

[0006]

A refrigerator 1 according to the present invention heats an inside of a storage chamber 16 surrounded by a heat insulating wall, which is a heat insulating wall (heat insulating box body 2, doors 3, 4). Is the outer surface material 11,
11A and inner surface members 12 and 12A facing the storage chamber 16,
Middle surface materials 13, 13A arranged between the inner surface materials 12, 12A and the outer surface materials 11, 11A, and the middle surface materials 13, 13A
A high temperature resistant heat insulating material (glass wool) 14 filled between A and the inner surface materials 12, 12A, and a foamed heat insulating material (in-situ foaming method) filled between the middle surface material 13, 13A and the outer surface materials 11, 11A. Polyurethane foam 15).

[0007]

According to the storage cabinet 1 of the present invention, the inner surface materials 12 and 12A and the middle surface materials 13 and 13A of the heat insulating wall (heat insulating box 2, doors 3 and 4) facing the storage chamber 16 at a high temperature. A high temperature resistant heat insulating material (glass wool) 14 is filled between
Since a foamed heat insulating material (foamed polyurethane) 15 is filled between the outer surface material 11 and 11A and the outer surface material 11 and 11A, all of the high temperature resistance is provided between the inner surface material 12 and 12A of the heat insulating wall and the outer surface material 11 and 11A. The heat insulating performance of the heat insulating walls (the heat insulating box 2, the doors 3 and 4) can be significantly improved as compared with the case where the heat insulating material is filled. Therefore, the thickness of the heat insulation wall is reduced to reduce the storage room 1
The volume of 6 can be expanded, and the outer surface material 11,
It is also prevented that 11A becomes hot.

Further, the inner surface materials 12, 12A and the middle surface material 13,
Due to the heat insulating effect of the high temperature resistant heat insulating material (glass wool) 14 filled with 13A, the temperature of the middle surface materials 13 and 13A decreases to the heat resistant temperature of the foam heat insulating material (polyurethane foam) 15. 13, 13A and outer surface material 11, 1
Inconveniences such as deformation of the foamed heat insulating material (foamed polyurethane) 15 with 1A do not occur. Especially, the inner surface materials 13, 13
A foam insulation material (polyurethane foam) 15 is filled between A and the outer surface materials 11 and 11A by an in-situ foaming method, and is adhered to them. Therefore, compared with the case where only the conventional high temperature resistant insulation material is used. The strength of the heat insulating wall (heat insulating box 2, doors 3, 4) is also improved. Furthermore, high temperature resistant insulation (glass wool) 1
4 and the foam heat insulating material (foam polyurethane) 15 have the intermediate surface materials 13 and 13A interposed therebetween, so that the high temperature resistance due to the pressure when the foam heat insulating material (foam polyurethane) 15 is filled by in-situ foaming. The heat insulating material (glass wool) 14 is also prevented from being crushed, whereby the heat insulating performance of the high temperature resistant heat insulating material (glass wool) 14 is secured, and the heat insulating wall (heat insulating box body 2, doors 3, 4) is secured. It becomes possible to maintain a uniform thickness.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a vertical side view of a refrigerator 1 according to an embodiment of the present invention, FIG. 2 is a perspective view of the refrigerator 1, and FIG. 3 is a perspective view of the refrigerator 1 with doors 3 and 4 opened. . The warm storage 1 of the embodiment is used for storing, for example, a dish cooked in a kitchen of a hotel and transporting it to a banquet hall while keeping it warm, and is a heat insulating box body that opens forward as a heat insulating wall. 2, two upper and lower heat insulating doors 3 and 4 as heat insulating walls that openably and closably close the front opening of the heat insulating box 2, and moving wheels 6 attached to the bottom surface of the heat insulating box 2. Has been done.

A thermometer 7 is attached to the upper end of the front surface of the heat insulating box 2, and a control panel 8 is provided to the lower end of the front surface. As shown in the enlarged cross-sectional views of FIGS. 1 and 4, the heat insulating box body 2 includes a box-shaped outer surface member 11 made of a steel plate having a front opening,
The outer surface material 11 is housed at a predetermined interval inside,
A box-shaped steel plate inner surface member 12 having a front opening, and a steel plate middle surface member 13 disposed between the inner and outer surface members 12, 11.
Glass wool 14 as a high temperature resistant heat insulating material filled between the inner surface material 12 and the middle surface material 13, the middle surface material 13 and the outer surface material 1
1 and a foamed polyurethane 15 as a foamed heat insulating material that is filled by the in-situ foaming method.

A storage chamber 16 surrounded by the inner surface material 12 of the heat-insulating box 2 is formed. In the storage chamber 16, a plurality of stages for mounting the lunch box by shelf rails 17 on both sides. The shelves 18 of ... are erected. Storage room 16
A duct plate 19 extending vertically is provided between the inner surface member 12 and the shelf 18 at a space between the inner surface member 12 and the shelf 18, and a warm air passage 21 is formed inside the duct plate 19. It Further, the duct plate 19 is provided with a plurality of discharge ports 22 ... Located at the rear of the space on each shelf 18.

Similarly, as shown in FIG. 4, the doors 3 and 4 also have a steel plate outer surface member 11A, and a steel plate inner surface member 12A connected inside the outer surface member 11A at a predetermined interval. Between the inner and outer surface materials 12A and 11A, a steel-made middle surface material 13A, the same glass wool 14 filled between the inner surface material 12A and the middle surface material 13A, and the middle surface material 13A and the outer surface material 11A. It is composed of the same polyurethane foam 15 as described above, which is filled by the in-situ foaming method.

On the other hand, a handle 23 for movement is formed in a concave shape on the side surface of the heat insulating box 2, and a machine room 24 is formed in the lower part of the heat insulating box 2 behind the control panel 8. An air blower 26 and an electric heater 27 for heating are arranged in the machine room 24, and a suction port 28 communicating with the inside of the storage chamber 16 and an air outlet 29 communicating with the warm air passage 21 are formed on the upper surface thereof. Has been done. A humidifying plate 31 is further arranged above the heater 27, and the upper surface of the humidifying water storage tank faces the storage chamber 16. The blower 26 and the heater 27 are configured to be operated or generate heat by being supplied with commercial power from the power plug 32.

The operation of the above configuration will be described below. In the kitchen mentioned above, the power plug 32 of the refrigerator 1 is connected to a commercial power source, and thereby the blower 26 and the heater 27 are supplied with power. When the blower 26 and the heater 27 of the warm storage 1 are energized, the heater 27 generates heat, and the warm air whose temperature has risen by the blower 26 is blown by the blower 26 as shown by the arrow in FIG.
9 is blown into the warm air passage 21. The warm air blown into the warm air passage 21 is discharged from each discharge port 22 into the storage chamber 16 and, after heating the inside, passes through the front end of the lowermost shelf 18 and is sucked into the machine chamber 24 from the suction port 28. become.

Although the inside of the storage chamber 16 is heated by such forced circulation of warm air, a control device (not shown) cuts off the power supply to the blower 26 and the heater 27 when the temperature inside the storage chamber 16 rises to, for example, + 82 ° C., and then becomes + 78 ° C. Since the power is controlled to be re-energized when the temperature drops to, the inside of the storage chamber 16 is maintained at a high temperature of + 80 ° C. on average. After that, the dishes cooked in the kitchen are stored on the shelves 18 of the storage room 16, the power plug 32 is unplugged to move the heating cabinet 1 to the banquet hall, and at the banquet hall, the power plug 32 is again turned to the commercial power source. And the heating operation is restarted. Then, according to the progress of the banquet, the food is served in good timing.

By operating the heater 27 and the blower 26 as described above, the temperature inside the storage chamber 16 is raised to + 80 ° C. on average, so that the stored food is kept warm without being cooled until it is served. Also, the heater 27 and the blower 26 are stopped during the movement, but it is a short time,
Moreover, since the temperature reduction of the storage chamber 26 is suppressed by the heat insulating effect of the heat insulating box 2, there is no problem. Also, heater 2
Since the humidifying plate 31 is also heated by the heat generated by 7, the humidifying water evaporates, so that the inside of the storage chamber 16 is humidified to a predetermined humidity. Therefore, it is possible to prevent the food from being dried while keeping it warm and to keep it warmer.

As described above, the average temperature inside the storage chamber 16 is + 80 ° C.
Since the inner surface materials 12 and 12A facing the storage chamber 16 are heated to a temperature of + 80 ° C. or higher, the inner surface materials 12 and 12A facing the storage chamber 16 are heated to + 80 ° C. or higher. However, the glass wool 14 filled between the inner surface materials 12 and 12A and the outer middle surface materials 13 and 13A is a high temperature resistant heat insulating material, and since the heat resistant temperature thereof is high, the temperature of the inner surface materials 12 and 12A is concerned. No deformation or deterioration occurs even at high temperatures. Then, the inner surface material 13, 13A and the outer surface material 11, 11A
Since a polyurethane foam 15 having a low thermal conductivity is filled between the inner surface member 12 and 12A and the outer surface member 11 and 1,
The heat insulating performance of the heat insulating box 2 and the doors 3 and 4 is remarkably improved as compared with the case where glass wool is filled between 1A. Therefore, the thickness of the heat insulating box 2 and the doors 3 and 4 can be reduced to increase the volume of the storage chamber 16. In addition, this also prevents the outer surface materials 11 and 11A from being abnormally heated, and the power consumption of the heater 27 is also reduced.

Further, the inner surface materials 12, 12A and the middle surface material 13,
Due to the heat insulating effect of the glass wool 14 filled between the inner surface material 13 and 13A, the temperature of the inner surface material 13, 13A can be lowered to about + 60 ° C. Therefore, the inner surface material 13, 13A and the outer surface material 11, 1
The disadvantage that the polyurethane foam 15 between 1A and 1A is deformed or deteriorated is also prevented. In particular, the foamed polyurethane 15 filled between the inner surface material 13, 13A and the outer surface material 11, 11A
Since they are adhered to them, the strength of the heat insulating box 2 and the doors 3 and 4 can be improved as compared with the case where only glass wool is filled.

Further, since the inner surface materials 13 and 13A are interposed between the glass wool 14 and the polyurethane foam 15, the glass wool 14 may be crushed by the foaming pressure when the polyurethane foam 15 is foamed in situ. To be prevented. As a result, the heat insulation performance of the glass wool 14 is ensured and the thickness of the heat insulation box 2 and the doors 3 and 4 can be kept uniform.

In the embodiment, the description has been given by taking as an example the food storage warmer equipped with the wheels 6 and moved from the kitchen to the banquet hall. However, the invention is not limited to this and it can be used for all other purposes. The present invention is effective. For example, if a battery is installed in the warm storage 1 and the blower 26 and the heater 27 are configured to be operated by power supply from the battery, the bento can be stored in a bento manufacturing factory or the like, and can be directly used as a transport vehicle or the like. It is also possible to load and deliver to a destination such as a convenience store while keeping it warm.

In the embodiment, the inner and outer surface materials and the inner surface material form an integral heat insulating box, but the invention is not limited to this, and each surface material and the heat insulating material form a plurality of heat insulating walls and combine them. Therefore, a storage room may be formed inside.

[0022]

As described above in detail, according to the present invention, a high temperature resistant heat insulating material is filled between the inner surface material and the middle surface material of the heat insulating wall facing the storage room having a high temperature. Since the foam insulation material is filled between the face material and the outer surface material, the heat insulation of the heat insulation wall is better than that when all the high temperature resistant heat insulation material is filled between the inner surface material and the outer surface material of the heat insulation wall. The performance can be significantly improved. Therefore, it is possible to reduce the thickness of the heat insulating wall to increase the volume of the storage chamber, prevent the outer surface material from becoming hot, and contribute to energy saving.

Further, due to the heat insulating effect of the high temperature resistant heat insulating material filled between the inner surface material and the middle surface material, the temperature of the middle surface material decreases to the heat resistant temperature of the foamed heat insulating material, so that the middle surface material and the outer surface material. Inconvenience such as deformation of the foamed heat insulating material between the material does not occur.
In particular, a foam insulation material is filled between the middle surface material and the outer surface material by the in-situ foaming method and adheres to them. Strength is also improved. Further, since the middle surface material is interposed between the high temperature resistant heat insulating material and the foamed heat insulating material, it is possible to prevent the high temperature resistant heat insulating material from being crushed by the pressure when foaming the foamed heat insulating material on site. As a result, the heat insulating performance of the high temperature resistant heat insulating material can be ensured, and the heat insulating wall can have a uniform thickness.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a heating cabinet according to an embodiment of the present invention.

FIG. 2 is a perspective view of a heating cabinet according to the present invention.

FIG. 3 is a perspective view showing a state where a door of the heating cabinet of the present invention is opened.

FIG. 4 is an enlarged cross-sectional view of a heat insulating box and a door of the heating cabinet of the present invention.

[Explanation of symbols]

 1 Heat Storage 2 Insulation Box 3 Door 4 Door 11 (11A) Outer Surface Material 12 (12A) Inner Surface Material 13 (13A) Middle Surface Material 14 Glass Wool 15 Foamed Polyurethane 16 Storage Room 21 Warm Air Path 26 Blower 27 Electric Heater

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuyoshi Kawaguchi 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A warming cabinet for heating a storage chamber surrounded by a heat insulating wall, wherein the heat insulating wall has an outer surface material, an inner surface material facing the storage room, and a space between the inner surface material and the outer surface material. , A high temperature resistant heat insulating material filled between the inner surface material and the inner surface material, and a foam heat insulation filled between the inner surface material and the outer surface material by an in-situ foaming method. A refrigerating warehouse characterized by being provided with a material.