JPS6235029B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerator in which a cool storage body is attached to a cooler.

In this type of refrigerator, a regenerator consisting of a regenerator sealed in a container that solidifies and melts at a predetermined temperature is attached to the cooler for heat transfer.The regenerator solidifies during the day when the compressor is operated, and at night it generates noise. In order to prevent this from occurring, the operation of the compressor is stopped and the inside of the refrigerator is cooled by the cool storage agent in a solidified state. By the way, it is desirable for the cold storage agent sealed in such a cold storage body to have a solidification temperature in the range of -5 to -15°C from the perspective of cooling capacity, etc., and from the conventional viewpoint of cost and safety, for example, It is common to use an aqueous potassium chloride solution. However, this potassium chloride aqueous solution has a coagulation temperature of -
The temperature is 11℃, and solidification will not begin at all unless the cooler is cooled to this temperature. Therefore, for example, in the summer when the temperature is high and the compressor is operated frequently and the operating time is long, it is necessary to use sufficient refrigerant. Even if the regenerator can be cooled and solidified, the problem is that the regenerator cannot be cooled sufficiently in winter when the compressor is operated less frequently and the operating time per operation is short, making it impossible to solidify the regenerator. It was hot. If the cold storage agent does not solidify in this way, the cold storage agent will not be able to maintain a low temperature for a long time during the night when the compressor is not operated for a long time, resulting in insufficient cooling inside the refrigerator. Additionally, in order to prevent this, if the compressor is operated frequently during the day to completely solidify the refrigerant, the inside of the refrigerator will become supercooled in the winter, causing the stored items to freeze. occurs.

Therefore, the purpose of the present invention is to
To provide a refrigerator capable of solidifying a cold storage body without freezing stored items even in winter, and capable of surely cooling at night.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a refrigerator body with a refrigerating compartment 2 formed inside, 3 a box-shaped cooler, for example, arranged above the inside of the refrigerating compartment 2, and 4 a water tray arranged below this cooler 3, which collects the water. Left and right sides of saucer 4 and refrigerator compartment 2
A cold air passage (not shown) is formed between the inner surface of the tube and the inner surface of the tube. Reference numeral 5 denotes a cold storage body attached to the cooler 3, which consists of two types of cold storage bodies 5a and 5b having different solidification temperatures, which are stacked in a flat box-shaped container 6 with a thin plastic sheet 7 interposed therebetween. A regenerator 5a with a high solidification temperature is disposed on the lower side that is in thermal conductive contact with the cooler 3, and a regenerator 5b with a low coagulation temperature is disposed above it. In this embodiment, water (solidification temperature: 0°C) is used as the cold storage body 5a on the high solidification temperature side, and potassium chloride aqueous solution (solidification temperature -11°C) is used as the cold storage body 5b on the low solidification temperature side. A curing agent is added.

In the above configuration, a compressor (not shown)
When you start the cooling operation, the cooler 3 is cooled and the inside of the refrigerator compartment 2 reaches the refrigeration temperature (for example, about 3°C).
At the same time, the cool storage body 5 is maintained by the cooler 3.
is cooled and solidified. At night, the operation of the compressor is automatically stopped using, for example, a timer device (not shown) to prevent the generation of noise. While the compressor is out of operation,
Since the cool storage body 5 in a solidified state gradually melts and maintains a low temperature for a long period of time, the inside of the refrigerator compartment 2 is maintained at the refrigeration temperature.

Now, when the outside temperature is high, for example in the summer, the internal temperature of the refrigerator compartment 2 has a strong tendency to rise, so the compressor is operated frequently. For this reason, the cool storage body 5 is sufficiently cooled, so first the cooler 3
Since the cold storage body 5a on the high solidification temperature side that is in contact with the cold storage body 5a is solidified, and heat is further removed through the cold storage body 5a, the temperature of the cold storage body 5b on the low solidification temperature side is subsequently lowered and solidified. By the way, in the case of this type of regenerator, there is a situation in which the thermal conductivity of the solid phase is better than that of the gelled liquid phase. Therefore, in this embodiment, the regenerator 5 with a high solidification temperature
Since the cold storage body 5b, which has a low solidification temperature, is placed on the top side, it has already solidified and has a relatively good thermal conductivity. Since heat is removed through the solid phase cold storage body 5a, the cold storage body 5b can be efficiently cooled. Also, when the cool storage body 5 solidified in this manner gradually melts to cool the inside of the refrigerator compartment 2, the upper cold storage body 5b first melts to form the solid phase cold storage body 5a with good thermal conductivity. Since heat is absorbed through the cooler 3, the inside of the refrigerator 2 can be efficiently cooled.

Also. For example, when the outside temperature is low, such as in winter, the frequency of operation of the compressor is low, so it may not be possible to cool the cold storage body 5 to a temperature low enough to solidify the cold storage body 5b on the low freezing temperature side. be. However, there is a cooling capacity that can cool the cold storage body 5a on the high freezing temperature side made of water,
Moreover, since the cold storage body 5a is placed on the cooler 3 side,
Only the cold storage body 5a can be reliably solidified. and,
The cool storage body 5b solidified in this manner maintains a low temperature (solidification temperature) for a long period of time as it gradually melts when the compressor is stopped, thereby cooling the inside of the refrigerator compartment 2. In addition, since only the cold storage body 5b solidifies in this way when the outside temperature is relatively low,
There is little heat leakage between the refrigerator compartment 2 and the outside of the refrigerator, so even if only the cold storage body 5b is solidified, the inside of the refrigerator compartment 2 can be cooled for a sufficiently long time.

As described above, in the present invention, the cold storage body attached to the cooler is composed of two types of cold storage bodies having different solidification temperatures, and both cold storage bodies are arranged in the order of high solidification temperature side and low solidification temperature side with respect to the cooler. The feature is that they are installed one above the other, and as a result, even in the winter when the frequency of compressor operation decreases, at least only the regenerator on the high freezing temperature side can be reliably solidified. Cooling can be carried out over a long period of time during the night when the compressor is not operating, and since the regenerator with a high solidification temperature, which solidifies first, is attached to the cooler, both regenerators can be efficiently cooled by the cooler. In addition, it is possible to provide a refrigerator that can efficiently cool the inside of the refrigerator via the cooler using the cold storage body when the compressor is stopped.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being an overall front view and FIG. 2 being an enlarged longitudinal cross-sectional view of a cool storage body. In the figure, 2 is a cold storage room, 3 is a cooler, 5 is a cold storage body,
5a is a cold storage body on the high solidification temperature side, and 5b is a cold storage body on the low solidification temperature side.

Claims (1)

[Claims] 1. In a cooler that cools a cold storage body attached to a cooler during cooling operation and cools the inside of the refrigerator when the cooling operation is stopped, the cold storage body is made of two types of cold storage bodies that have different solidification temperatures. A refrigerator characterized in that both the cold storage bodies are attached to the cooler in the order of a high solidification temperature side and a low solidification temperature side.