JPS60129579A - Method and device for defrosting cooler - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a defrosting method and apparatus for a cooler provided with freezing and refrigeration means (C). [As shown in Figure 1, the defrosting method is as follows: A refrigeration cycle that circulates to the refrigerator 6 (in step 2, high-temperature, high-pressure gas is introduced between the solenoid valve 1 and the pressure reducing valve 2 as shown by the arrow), or (2) in a refrigeration cycle similar to the above, as shown by the arrow As shown in Figure 3, there are two ways to introduce high temperature and high pressure gas into the distributor 3C, but in both cases, until the gas reaches the cooler from the introduction part, C2 has several parts that have flow resistance due to its structure. It takes a long time to reach the target (because the bifurcated pipe 4 has a small diameter, it takes a long time to reach the target), and the cooling of the gas is large. The temperature of the gas drops significantly before it reaches the cooling coil section in the center of the tower, resulting in poor defrosting efficiency. This caused problems such as the stored frozen and refrigerated items being damaged and their quality deteriorating.

The purpose of the present invention is to eliminate the above-mentioned difficulties all at once by eliminating flow resistance and temperature drop between the high-temperature, high-pressure gas introduction section and the cooling coil section at the center of defrosting, thereby achieving extremely high defrosting efficiency. An excellent chiller that can contribute to freezing storage and maintaining the quality of refrigerated items by rapidly defrosting and allowing the chiller to return to cooling operation after a very short period of time. This invention attempts to provide a defrosting method and device, and the gist of the invention is to directly supply high-temperature, high-pressure gas, which constitutes one phase of the refrigerant used in the refrigeration cycle, to a plurality of cooling pipes constituting a cooling coil. A defrosting method for a cooler characterized by introducing a method for defrosting a cooler, an enclosing device that airtightly encloses all of the base portions of a plurality of cooling pipes constituting a cooling coil and communicates with the cooling pipes, and the enclosing device. (This is a defrosting device for a cooler characterized by comprising a gas pipe for introducing a high temperature surface pressure gas forming one phase of the refrigerant used in the two-refrigeration cycle, and a solenoid valve for opening and closing the gas pipe.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.The electromagnetic valve 1. The refrigeration cycle circulates through the pressure reducing valve 21, the distributor 3, and the distribution pipe 4, through the cooling coil 5, and then to the refrigerator 6. A hole 8 is drilled in the part of the cooling tube 6 that is airtightly contained in the insertion device 7 and penetrates through the inside of the insertion device 7, so that all the cooling tubes 6 and the enclosing device 7 are integrally communicated. A high-temperature, high-pressure gas forming one phase of the refrigerant used in the refrigeration cycle is introduced into the enclosure 7, and a gas pipe 9 is connected via a solenoid valve 10.

Next, based on the above embodiments, we will explain the operation and effect (to explain in two parts, during the cooling operation of the refrigerator 6, the cooling coil 5 and its surroundings gradually become frosted and the heat transfer effect of the cooler deteriorates, resulting in the cooling effect. It is necessary to defrost as appropriate as the temperature drops significantly.The defrosting timing is not shown in the figure, but it is detected manually or automatically (2), and when the defrosting operation signal is received, the liquid sending solenoid valve 1 is closed. Then, the solenoid valve 10 of the high-pressure gas pipe 9 is opened, and the high-temperature, high-pressure gas in the transient phase state of the refrigerant used in the refrigeration cycle is released into the enclosure 7.
directly into the cooling pipe 6 through the cooling pipe 6.
The temperature and pressure inside the cooling coil 5 increase rapidly, and heat is rapidly transferred evenly throughout the cooling coil 5, thereby effectively defrosting the coil.

As described above, the present invention allows the high-temperature, high-pressure gas in the transient phase state of the refrigerant used in the refrigeration cycle to be transferred directly to the cooling pipe without passing through a pressure reducing valve, distributor, or power distribution device that has flow resistance. Since the heat □ is introduced into the whole cooling pipe as a medium (-2 heat is rapidly transferred and frost is formed (2), the defrosting efficiency is extremely crystallized. Defrosting occurs quickly (2) and normal cooling operation can be restored as soon as possible! Therefore, the time it takes to warm up the cooler for defrosting is extremely short (= suppressed). Because of this, it is possible to maintain the quality of stored frozen and refrigerated items without spoiling them, and exhibits excellent performance both rationally and economically.

[Brief explanation of drawings]

FIG. 1 is a conventional configuration diagram, and FIG. 2 is a partially sectional configuration diagram of an embodiment of the present invention.

Claims (2)

[Claims] (1) A method of defrosting a cooler characterized by directly introducing high-temperature, high-pressure gas, which constitutes one phase of the refrigerant used in the refrigeration cycle, into a plurality of cooling pipes 6 constituting the cooling coil 5. (2) It airtightly encloses all the base parts of the plurality of cooling pipes 6 constituting the cooling coil 5 (an enclosure 7 that communicates with the double-chain cooling pipes, and A defrosting device for a cooler characterized by comprising a gas pipe 9 for introducing high-temperature, high-pressure gas forming one phase of the refrigerant used, and a solenoid valve 10 for opening and closing the gas pipe 9.