JPH074807A - Cold accumulator of refrigerator - Google Patents

Abstract

PURPOSE: To keep the temperature in a refrigerator at a constant level while reducing power consumption by forming a porous substance containing a phase change substance on the inner wall of a cabinet or coating the inner and outer side faces thereof with the phase change substance while cross-linking with a fibrous substance for preventing the phase change substance from flowing out thereby accumulating chill in the refrigerator. CONSTITUTION: The gap between the inner and outer walls 10a, 20 of the cabinet in a refrigerator is filled with a heat insulating material 30 wherein the inner wall 10a is formed in layer structure having an enclosed space while containing a phase change substance 40. Alternatively, the gap between the inner and outer walls 10b, 20 of the cabinet is filled with the heat insulating material 30 wherein the inner wall 10b is formed in lattice structure having an enclosed space while containing the phase change substance 40. Alternatively, the gap between the inner and outer walls 10c, 20 of the cabinet is filled with the heat insulating material 30 wherein the inner wall 10c is formed into tunnel shape having an enclosed space while containing the phase change substance 40. The phase change substance 40 is also applicable to the inner wall of an inner compartment and the door of the refrigerator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator (or a cold storage), and in particular, a phase change substance having a cold storage effect is inserted or applied in the wall of the refrigerator to store cold air when the refrigerator is operated. If the refrigerator does not operate due to a power outage, etc., the temperature inside the refrigerator can be maintained properly by preventing it from cooling, and also the temperature inside the refrigerator can be maintained properly when the doors are opened and closed frequently. Turn on the refrigerator,
The present invention relates to a cool storage device for a refrigerator that has a long off cycle and reduces power consumption.

[0002]

2. Description of the Related Art Generally, a refrigerator is used for storing various foods in a frozen or refrigerated state and keeping them fresh for a long time.

In such a refrigerator, an evaporator of a refrigeration cycle is installed in a food storage space so that direct heat exchange is performed, and an evaporator is installed on a passage isolated from the food storage space. In addition, there is an indirect cooling method in which cold air that has undergone heat exchange through an evaporator is circulated to a food storage space by using the wind force of a cooling fan to cool food and drink.

In such a refrigerator, a freezer compartment and a refrigerating compartment are generally vertically separated. As shown in FIG. 1, in front of the freezer compartment and the refrigerator compartment, there are provided a freezer compartment door 1 and a refrigerator compartment door 2 which are rotated around one side, respectively.
The freezer compartment door 1 or the refrigerating compartment door 2 can be opened and closed when the food is stored or withdrawn.

As shown in FIG. 2, conventionally, an inner wall 10 and an outer wall 2 of a cabinet forming a freezing room and a refrigerating room of the above refrigerator are used.
A polyurethane heat insulating material 30 is filled between 0 and 0 to prevent cold air loss in the refrigerating room and the freezing room.

[0006]

By the way, in the conventional refrigerator having the structure filled with the heat insulating material 30 as described above, the heat insulating material 30 simply prevents heat from permeating from the outside, and the cold air inside is discharged to the outside. It only had the function of preventing it from being transferred and causing heat loss. In other words, the refrigerator cabinet is ABS (Acrylonitrile).
It has a structure in which a heat insulating material is filled between the inner wall 10 and the outer wall 20 of a refrigerator made of Butadiene Styrene material, and cold air cannot store cold and has only a cold insulation function.

Therefore, when the refrigerator operates, when the temperature of the refrigerating room and the freezing room falls below an appropriate temperature, the refrigerator must be turned on and off automatically to operate.
The power consumption by that was large.

Not only that, if the door of the refrigerating room or the freezing room is frequently opened and closed, the cold air is discharged to the outside as the door is opened and closed, and the cold air is lost, and the refrigerator is not driven at the time of power failure. There was a problem that the temperature of the food increased and the freshness of foods and drinks stored was lowered.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a phase change substance having a cold storage effect is contained in the inner wall of a cabinet in a refrigerator, or It is applied to store cold when the refrigerator is driven, and to prevent cold when the refrigerator is not operated due to a power failure or the inside temperature rises by opening and closing the door.

Thus, the temperature inside the refrigerator is not only kept constant, but also the refrigerator is turned on and off for a long time, thereby providing a cool storage device for the refrigerator with reduced power consumption. There is.

[0011]

[Means for Solving the Problems] The above object is to contain or apply a phase change substance, which is stored or cooled as the temperature changes with reference to a predetermined temperature, on the inner wall of a cabinet in a refrigerator so that the internal temperature of the refrigerator is predetermined. When the temperature is lower than the temperature, the phase change material stores the cold, and when the temperature is higher than the predetermined temperature, it is achieved by a cold storage device of the refrigerator that performs cold protection to keep the internal temperature at the predetermined temperature.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In order to achieve the above object, the present invention is configured such that the inner wall of a refrigerator cabinet forming a space for storing food is formed into a tunnel type or a layered structure, and a clathrate lattice having a lattice structure, and cools or cools as the temperature changes with reference to a predetermined temperature. The interior wall of the cabinet is made to contain a phase change material for cooling.

In FIG. 3A, a heat insulating material 30 is filled between the cabinet inner wall 10a and the outer wall 20 of the refrigerator, and the cabinet inner wall 10a has a layered structure and has a closed space. Is formed. Furthermore, the inner wall 10a of the cabinet contains the phase change material 40.

FIG. 3B shows another embodiment of the present invention, in which a heat insulating material 30 is filled between the cabinet inner wall 10b and the outer wall 20 of the refrigerator, and the inner wall 10b has a lattice structure. And is formed to have a closed space. Therefore, the inner wall 10b can contain the phase change material 40.

FIG. 3C shows still another embodiment of the present invention, which is an inner wall 10C and an outer wall 20 of a refrigerator cabinet.
A heat insulating material 30 is filled between and, and the inner wall 10C is formed to have a tunnel-shaped closed space. Therefore, the inner wall 10C can contain the phase change material 40.

As in each of the above-described embodiments, in the refrigerator of the present invention, the inner walls 10a, 10b and 10c are made of a porous material so that the phase change material is contained therein. At this time, it is preferable to use a phase change substance having a melting point close to −18 ° C. in the freezing compartment and a phase change substance having a melting point close to 3 ° C. in the refrigerating compartment.

In this way, the phase-change substance provided in the freezer compartment stores cold when the temperature of the freezer compartment is lower than -18 ° C, and the phase-change substance provided in the refrigerator compartment is lower than 3 ° C. Sometimes it stores cold. Therefore, the inside wall 10 of the refrigerator in operation
When the cold air is stored in the phase change substance 40 contained in a, 10b, 10c, and the temperature inside the chamber rises due to a power outage or frequent opening and closing of the refrigerator or freezer door, the phase change substance 40 Cooling can be done to keep the inside temperature at an appropriate temperature for a considerable time.

On the other hand, the phase change material 40 is, as described above,
It goes without saying that not only the inner walls 10 of the freezer compartment and the refrigerator compartment can be made of a porous material so that the phase change material can be contained therein, but also the inner walls of the built-in compartment and the freezer compartment door can be applied as described above.

Further, the phase change substance may be cross-linked with the fibrous material so as not to flow down, and then adhered or applied to the inner or outer surface (between the inner side and the heat insulating material) of the inner wall 10. At this time, as the phase change material, it is desirable to use a eutectic salt that forms a eutectic mixture in which the salt is dissolved in water, in order to lower the melting point.

[0020]

As described above, according to the present invention, the inner wall of the cabinet of the refrigerator is formed by forming a porous material to contain the phase change material, or by cross-linking with a fiber so that the phase change material does not flow. By attaching or applying to the inside and outside surfaces of the inner wall, cool air in the refrigerator is stored, and even when the refrigerator is not operating due to a power outage, etc., the inside temperature can be maintained at an appropriate temperature state for a considerable time. Therefore, there is an effect of improving the reliability of the product. It is obvious that the present invention can be modified in various ways without departing from the scope of the present invention. In particular, the structure of the inner wall of the cabinet containing the phase change material can be modified in various ways such as a honeycomb shape.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing the configuration of a general refrigerator.

FIG. 2 is an enlarged sectional view of the cabinet structure in FIG.

3 (A) to 3 (C) are enlarged cross-sectional views showing an embodiment of a cold storage device for a refrigerator according to the present invention, showing a state in which a refrigerator cabinet inner wall has a structure capable of containing a phase change material. Is.

[Explanation of symbols]

 10 inner wall 20 outer wall 30 heat insulating material 40 phase change material

Claims (10)

[Claims] 1. A refrigerator formed by a cabinet in which a heat insulating material is filled between an inner wall and an outer wall, wherein the inner wall of the cabinet has a sealed space, and the sealed space of the inner wall of the cabinet. Is a cold storage device for a refrigerator that is filled with a phase change material that can store and prevent cold. 2. The refrigerator according to claim 1, wherein the inner wall of the cabinet has a layered structure and has a closed space. 3. The refrigerator according to claim 1, wherein the inner wall of the cabinet has a lattice structure and has a closed space. 4. The cool storage device for a refrigerator according to claim 1, wherein an inner wall of the cabinet has a tunnel structure and has a closed space. 5. The phase change material according to claim 1, wherein cold air is stored during operation of the refrigerator, and when the temperature inside the refrigerator rises, it is cooled to keep the temperature inside the refrigerator at an appropriate temperature for a considerable time. Regenerator for the refrigerator described. 6. A refrigerator comprising a cabinet in which a heat insulating material is filled between an inner wall and an outer wall of the refrigerator, wherein a phase change substance capable of cold storage and cold protection is applied to the inner wall of the cabinet. . 7. The cool storage device for a refrigerator according to claim 6, wherein the phase change material is applied to an inner surface of the inner wall of the cabinet. 8. The cool storage device for a refrigerator according to claim 6, wherein the phase change material is applied to an outer surface of the inner wall of the cabinet. 9. The cold storage device for a refrigerator according to claim 6, wherein the phase change material is crosslinked with a fibrous material. 10. The regenerator for a refrigerator according to claim 6, wherein the phase change substance is a eutectic salt obtained by dissolving a salt in water so that the melting point is lowered.