JP2000074554A - Wall structure in refrigerator and freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall structure of a refrigerator and freezer in which an inner side of a honeycomb plate seal closed with a resin film is set into a vacuum layer and at the same time, there is provided a damaged state indicating member for sensing a damaged state of the resin film. SOLUTION: A wall structure in this refrigerator and freezer is comprised of a wall 1 forming a refrigerating and freezing chamber 2 and a thermal insulating panel 3 arranged at the wall 1. The thermal insulating panel 3 comprises a honeycomb plate 4 having its inner side as a vacuum layer 7; felt members 5 fixed at both surfaces of the honeycomb plate 4; a damaged state indicating member 10 composed of material immersed in the felt members 5 and reacted with water to show alkaline state and powder mixed with azoltmin; and a resin film 6 arranged at the surfaces of the felt members 5 to seal the vacuum layer 7 and at same time having a vent hole which can be opened or closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall in a refrigeration freezer provided with a heat shield panel detachably fixed to a wall constituting a refrigeration freezer applied as an installation type or a vehicle-mounted refrigeration freezer. Regarding body structure.

[0002]

2. Description of the Related Art In general, a diesel engine using fuel such as light oil is used as a cogeneration system or an engine for a vehicle, and there are many systems in which a generator is attached to the engine. By the way, a refrigerator is provided on a cargo bed of a vehicle, a device for lowering the temperature in the refrigerator compartment by a refrigerator, and transporting the food in a refrigerator is currently generally used.

The present inventor has proposed a heat and sound insulation chamber which forms a chamber from a double-walled structure having a vacuum layer inside, and reduces the surface area of the chamber as much as possible to achieve effective heat and sound insulation. Developed and filed earlier (for example,
No. 94, Japanese Patent Application No. 10-39868). The heat and sound insulation chamber has a vacuum chamber formed by forming a chamber formed into a shape having a flat surface in a part of a cylindrical body having a cross section of a circular shape and a substantially circular shape. Consisting of a double-walled structure. The double-walled structure is composed of a pair of frames that are spaced apart from each other to form a hollow part, a front panel fixed to them, and a contact part between the frame and the entire periphery of the front panel. And a sealing member for sealing the inside of the hollow portion to a vacuum state.

[0004]

However, in the conventional refrigerated freezer, the heat insulating material does not have sufficient performance, and at present, the wall thickness of the heat insulating material constituting the wall of the refrigerated freezer is large. In addition to the large size and heavy weight, large refrigeration units must be operated all the time.

Incidentally, a double-walled structure having a vacuum layer (for example, a thermos) can effectively block heat. This is because, in the structure, the transfer of heat is interrupted by the vacuum layer by evacuating the hollow portion having the double wall.

[0006]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a heat shield panel which can be easily attached to and detached from a wall constituting a refrigerated freezer compartment, and the heat shield panel is evacuated. Formed in layers to maintain the degree of vacuum inside the heat shield panel, easily detect the broken state of the resin film and easily replace it with a new heat shield panel according to the broken state of the resin film on the heat shield panel It is an object of the present invention to provide a wall structure in a chilled freezer.

The present invention comprises a wall constituting a refrigerated freezer compartment and a heat shield panel disposed on the side of the wall of the refrigerated freezer compartment, wherein the heat shield panel has a honeycomb shape having a vacuum layer inside. Plate, felt material fixed on both sides of the honeycomb-shaped plate, damage indicator material made of powder mixed with azoritmin and a material impregnated in the felt material and reacting with water and becoming alkaline, and the surface of the felt material The present invention relates to a wall structure in a freezer, which is made of a resin film which is disposed at a position and which has an air vent hole capable of sealing the vacuum layer and having a sealable air vent.

[0008] The damage indicating material is applied to the felt material on the side of the refrigerator compartment. The material which becomes alkaline by reacting with the water impregnated in the felt material is caustic soda. The honeycomb plate is made of a porous material formed of a lightweight plastic material. Further, the resin film is a sealing film formed of nylon, vinyl chloride, or polyethylene.

The heat shield panel is detachably fixed to the wall body.

[0010] In the wall structure of the refrigerated freezer, the heat shield panel is configured as an internal door incorporated in the wall inside the door of the refrigerated freezer. Therefore, when loading / unloading the luggage to / from the refrigerated freezer, the internal door can effectively prevent the escape of cool air in the refrigerated freezer or the intrusion of heat from the outside.

The damage indicator is applied to the felt material on the side of the refrigerator compartment.

The felt material covers the entire outer surface of the honeycomb plate except for the air vent holes.
The resin film covers the entire outer surface of the felt material except for the air vent holes. Further, the air vent hole is sealed with a sealing stopper capable of maintaining the vacuum layer in the honeycomb-shaped plate body. Therefore, even if any part of the resin film covering the entire surface of the honeycomb plate and the felt material is damaged, the phenomenon can be immediately recognized by the action of the damage indicating material.

[0013] The wall structure in the refrigerated freezer is applied to an installation type refrigerated freezer installed at a predetermined place or a refrigerated freezer mounted on a refrigerated freezer.

[0014] Since the wall structure in the refrigerator is configured as described above, the honeycomb plate or felt material reduces the thermal conductivity to maintain the cold air in the refrigerator compartment, and also to maintain the honeycomb structure. By forming a vacuum layer in the plate-like body, an extremely strong degree of heat insulation can be secured. Further, for example, when the resin-made film sealing the honeycomb-shaped plate body is damaged by a load or an external force and damaged, and the degree of vacuum in the honeycomb-shaped plate body is destroyed and the heat shielding function is reduced, Since the moisture penetrates into the felt material from the damaged portion of the resin film and reacts with water such as caustic soda as the damage indicating material, the alkaline material discolors azolithamine to blue. Of the vacuum degree can be recognized. Therefore, at that time,
By simply replacing the damaged heat shield panel with a new heat shield panel, the function of the wall structure can be regenerated and the degree of heat shield in the refrigerator compartment can be improved again.

Further, as described above, the wall structure of the refrigerator-freezer has a structure in which the heat shield plate is formed in a vacuum structure, and the honeycomb plate itself is capable of passing a fluid, and air is sucked from the inside. Thus, the inside of the wall itself can be easily evacuated. In addition, the discoloration of the felt material can be seen by using transparent polyethylene, polyvinylidene chloride, and other materials for the resin film, so that the degree of vacuum inside the wall can be immediately recognized, and the airtightness inside the wall can be reduced. It can immediately recognize whether or not it is maintained, and if the heat shield panel is damaged, the degree of heat insulation can be secured by replacing only the damaged heat shield panel with a new heat shield panel. In addition, the wall structure in this refrigerated freezer is maintained reliably by the vacuum layer, so there is no need to increase the size of the refrigerator, and the vacuum pump is operated to vacuum the inside of the wall to reduce the heat insulation. Improving the cost can reduce the cost. Further, the size of the heat shield panel may be adjusted to an appropriate size according to the size of the vehicle or the like, and an optimal refrigerated freezer can be manufactured.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wall structure in a refrigerator according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing an embodiment of a refrigerated freezer having a wall structure according to the present invention, FIG. 2 is a front view showing the inside of the refrigerated freezer of FIG. 1, and FIG. 3 is a wall structure of the refrigerated freezer of FIG. FIG. 4 is a partially cutaway perspective view of a heat shield panel incorporated in the refrigerated freezer of FIG. 1, and FIG. 5 is a cross sectional view showing the heat shield panel incorporated in the refrigerated freezer of FIG.

The wall structure in the refrigerated freezer according to the present invention is applied, for example, as an installation-type refrigerated freezer installed at a predetermined location, or as a refrigerated freezer mounted on a vehicle. The wall structure in the refrigerated freezer mainly includes a wall 1 constituting a refrigerated freezer 2 and a heat shield panel 3 disposed on the side of the wall 1 on the refrigerated freezer 2 side. The heat shield panel 3 is impregnated into the honeycomb-shaped plate 4, the inside of which is a vacuum layer 7, the felt material 5 fixed on both surfaces of the honeycomb-shaped plate 4, and the felt material 5, and reacts with water to become alkaline. A transparent or translucent transparent indicator which is disposed on the surface of the fracture indicator 10 and the felt 5 which is made of a powder mixed with the material and azolithmin, and which has a sealed air vent 8 which seals the vacuum layer 7 and has a sealable air vent 8. It is composed of a resin film 6.

The damage indicating material 10 is applied to the felt material 5 on the side of the refrigerator compartment 2. The material which becomes alkaline by reacting with the water impregnated in the felt material 5 of the heat shield panel 3 is caustic soda. The azolithamine constituting the damage indicator 10 is dark red, is soluble in an aqueous solution of alkali hydroxide or the like, changes color to red at pH 5 or lower, changes color to blue at pH 8 or higher, and does not change color at pH 5 to pH 8. It is a base indicator, ie litmus. Therefore, the resin film 6
The caustic soda dissolves in water due to the breakage of water and infiltration into the felt material 5, and changes color as alkali hydroxide.

The honeycomb plate 4 is made of a lightweight plastic material. The honeycomb plate is made of a porous material formed of a lightweight plastic material. Further, the resin film is a sealing film formed of nylon, vinyl chloride, or polyethylene.

The heat shield panel 3 is fixed to the wall 1 so that it can be attached and detached. It is fixed to. The attachment 11 can be made of an adhesive tape or the like that can seal the gap between the heat shield panels 3. Further, the heat shield panel 3 can be fixed to the wall 1 by pasting or the like. In addition, heat shield panel 3
Can be configured as an internal door 12 that is openably and closably incorporated into the wall 1 with a hinge 14 or the like inside the door 13 of the refrigerated freezer. Therefore, when the door 13 is opened, the inner door 1
2 serves as a heat shield wall, and the inside of the refrigeration compartment 2 is kept cool.

The wall structure of the refrigerator is such that the honeycomb plate 4 is sealed with a resin film 6 and the vacuum layer 7 is sealed.
, An extremely good heat shield layer can be formed. In addition, a vacuum pump can be provided to suck air from the inside of the honeycomb-shaped plate member 4 in order to make the inside of the honeycomb-shaped plate member 4 into a vacuum state. When the inside of the honeycomb plate 4 is evacuated, air is evacuated from a vent hole 8 provided in the resin film 6 by a vacuum pump, and then the vent hole 8 is sealed with a sealing stopper 15. Honeycomb plate 4
The degree of vacuum inside can be set to an appropriate degree of vacuum by, for example, detecting with a pressure sensor or the like. Since the honeycomb-shaped plate 4 is formed on the appropriate vacuum layer 7, the inside of the refrigeration compartment 2 can be shielded most efficiently, and the heat received from the outside into the refrigeration compartment 2 can be most efficiently received. Can be shut off.

Further, an engine equipped with a turbocharger, an energy recovery device, and the like can convert heat energy of exhaust gas into electric energy, so that a vehicle equipped with such an engine system can secure sufficient electric power. If a refrigerator equipped with this wall structure is mounted on a vehicle equipped with such an engine, electric power recovered from the thermal energy of exhaust gas can be used to cool the refrigerator inside the refrigerator compartment,
If used to drive a vacuum pump that evacuates the honeycomb-shaped plate, for example, the refrigerated freezer can be cooled with only the power of the vehicle without using external power, and the heat is effectively shielded Can be very effective.

[0023]

As described above, the wall structure in the refrigerator-freezer according to the present invention is constructed as described above. Therefore, when the resin film sealing the honeycomb-shaped plate is broken and the inner vacuum layer is broken, However, moisture enters the interior and the heat shield panel itself turns blue due to the action of the damage indicating material. Therefore, since the wall structure can recognize that the heat insulation degree of the heat insulation panel is reduced, it can be replaced with a new heat insulation panel and regenerated. Also, this wall structure
The vacuum layer in the honeycomb plate body can effectively block cold air from the refrigerator compartment to the outside, or can block absorbed energy such as heat energy from the outside into the refrigerator compartment,
It can be applied to stationary refrigeration freezers and refrigeration refrigeration vehicles mounted on vehicles, minimizing power consumption for driving the refrigerator, and greatly reducing running costs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a refrigerator-freezer having a wall structure according to the present invention.

FIG. 2 is a front view showing the inside of the refrigerator-freezer of FIG. 1;

FIG. 3 is a sectional view showing a part of the wall structure of the refrigerator-freezer in FIG. 1;

FIG. 4 is a partially cutaway perspective view of a heat shield panel incorporated in the refrigerator / freezer of FIG. 1;

FIG. 5 is a cross-sectional view showing a heat shield panel to be incorporated in the refrigerator of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall body 2 Refrigeration freezer room 3 Heat shield panel 4 Honeycomb-shaped plate body 5 Felt material 6 Resin film 7 Vacuum layer 8 Air vent hole 10 Breakage indication material 11 Fixture 12 Internal door 13 Door 15 Sealing stopper

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[Procedure amendment]

[Submission date] May 28, 1999 (1999.5.2
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

The present inventor has proposed a heat and sound insulation chamber which forms a chamber from a double-walled structure having a vacuum layer inside, and reduces the surface area of the chamber as much as possible to achieve effective heat and sound insulation. Developed and filed earlier (for example, Japanese Patent Application No. 10-1932)
No. 94, Japanese Patent Application No. 10-39868). The heat and sound insulation chamber has a vacuum chamber formed by forming a chamber formed into a shape having a flat surface in a part of a cylindrical body having a cross section of a circular shape and a substantially circular shape. Consisting of a double-walled structure. The double-walled structure is composed of a pair of frames that are spaced apart from each other to form a hollow part, a front panel fixed to them, and a contact part between the frame and the entire periphery of the front panel. And a sealing member for sealing the inside of the hollow portion to a vacuum state.

Claims (9)

[Claims] 1. A honeycomb-shaped plate body comprising a wall constituting a refrigeration freezing room and a heat shield panel disposed on the side of the wall of the refrigeration freezer, wherein the heat shield panel comprises a vacuum layer inside. Felt material fixed on both sides of the honeycomb plate,
A failure indicator made of a powder of azolithmin mixed with a material impregnated with the felt material and reacting with water to become alkaline, and an air vent hole disposed on the surface of the felt material and capable of sealing the vacuum layer and sealing. A wall structure in a refrigerated freezer, comprising a resin film that allows the color inside to be visually recognized, including: 2. The wall structure in the refrigerator according to claim 1, wherein the damage indicating material is applied to the felt material on the side of the refrigerator compartment. 3. The wall structure according to claim 2, wherein the material which reacts with the water impregnated in the felt material and becomes alkaline is caustic soda. 4. The wall structure according to claim 1, wherein said honeycomb-shaped plate is made of a porous material formed of a lightweight plastic material. 5. The wall structure according to claim 1, wherein the resin film is a sealing film formed of nylon, vinyl chloride, or polyethylene. 6. The wall structure according to claim 1, wherein said heat shield panel is fixed to said wall so as to be detachable. 7. The wall structure of the refrigerator according to claim 1, wherein the heat shield panel is configured as an internal door incorporated in the wall inside the door of the refrigerator. 8. The felt material covers the entire outer surface of the honeycomb-shaped plate except for the air vent hole, and the resin film entirely covers the outer surface of the felt material except for the air vent hole. The wall structure in the refrigerator according to claim 1, wherein the air vent hole is sealed with a hermetic plug capable of maintaining the vacuum layer in the honeycomb plate body. 9. The wall structure of a refrigerated freezer according to claim 1, wherein the wall structure is applied to an installation type refrigerated freezer installed at a predetermined place or a refrigerated freezer mounted on a refrigerated freezer.