Medical refrigeration container hot gas defrosting system for temperature and humidity control

Abstract

The invention discloses a medical refrigeration container hot gas defrosting system for temperature and humidity control, and belongs to the technical field of refrigeration plants. The medical refrigeration container hot gas defrosting system for temperature and humidity control is simple and reliable, and temperature and humidity in a refrigeration container meet standard requirements in the overall process. The medical refrigeration container hot gas defrosting system for temperature and humidity control comprises a compressor, the air exhaust end of the compressor is connected with a condenser through an air exhaust pipe, a drying filter is connected to the tail end of the condenser, the output end of the drying filter is connected with a refrigeration capillary pipe, the other end of the refrigeration capillary pipe is connected into an inlet of an evaporator, a liquid storage tank is arranged at an outlet of the evaporator, and the other end of the liquid storage tank is connected with the air inlet end of the compressor through an air inlet pipe; an electromagnetic valve is connected to the air exhaust pipe at the air exhaust end of the compressor and is connected with the condenser in parallel, a defrosting capillary pipe is connected to an outlet of the electromagnetic valve, and the defrosting capillary pipe and the refrigeration capillary pipe are connected in parallel to be connected into the inlet of the evaporator.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to a hot air defrosting system for a medical refrigerator with temperature and humidity control. Background technique [0002] Defrost plays a non-negligible role in refrigeration equipment such as refrigerators, air conditioners, and cold storage. In refrigeration systems, when the surface temperature of the evaporator is lower than the triple point temperature of water vapor in the surrounding environment, the water vapor in the air will evaporate. In order not to affect the normal operation of the refrigeration system, the frost layer on the surface of the evaporator must be melted and removed. In refrigeration equipment, defrosting measures are essential. There are two main disadvantages of evaporator frosting to the refrigeration system: one is that as the thickness of frosting increases, the heat transfer resistance will continue to increase and cau...

AI Technical Summary

Problems solved by technology

In refrigeration equipment, defrosting measures are essential. There are two main disadvantages of evaporator frosting to the refrigeration system: one is that as the thickness of frosting increases, the heat transfer resistance will continue to increase and cause The heat transfer performance of the heat exchanger is reduced. On the other hand, after the heat exchanger is frosted, the air supply volume is affected by the reduction of the fin spacing.

After the two form a vicious circle, the operating conditions of the entire refrigeration system will deteriorate and the refrigeration performance will decline.

[0003] There are generally two types of problems in the medical refrigerators currently on the market with dual-parameter control of temperature and relative humidity: one is that there is no defrosting function, and this kind of medical refrigerators may cause frosting or condensation on the evaporator if they run for a long time under harsh conditions. Second, it has a defrosting function, but most of the defrosting methods are defrosting with the compressor stopped or electric heating defrosting. The problems with these two defrosting methods are: The temperature and relative humidity in the box will exceed the range required by the standard

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