Heat storage defrosting system for cold storage air cooler and cold storage

Abstract

The invention relates to a heat storage defrosting system for a cold storage air cooler. The heat storage defrosting system comprises a refrigerating device, a heat storage device and a heat release device, wherein the refrigerating device comprises a compressor, a heat storage heat exchanger, a condenser, a throttling device and an evaporator which are sequentially arranged; the evaporator is connected into the compressor, and a refrigerating circulation loop is formed; the heat storage device comprises a heat storage tank, a heat storage pump, a heat storage heat exchanger and a heat storagevalve which are sequentially arranged; the heat storage valve is connected into the heat storage tank, and a heat storage circulation loop is formed; the heat release device comprises a heat storagetank, a heat release pump, a heat release heat exchanger and a heat release valve which are sequentially arranged; the heat release valve is connected into the heat storage tank, and a heat release circulation loop is formed; the refrigerating device and the heat storage device conduct heat exchange in the heat storage heat exchanger; and the refrigerating device and the heat release device conduct heat exchange through the evaporator and the heat release heat exchanger. The invention further relates to a cold storage. According to the heat storage defrosting system and the cold storage, energy consumption can be reduced, operation is more stable, temperature fluctuation in the cold storage is reduced, and the heat storage defrosting system and the cold storage belong to the technical field of refrigerating and quick freezing.

Description

technical field [0001] The invention relates to the technical field of refrigeration and quick-freezing, in particular to a heat storage defrosting system for a cold storage fan, and to a cold storage equipped with the heat storage defrosting system. Background technique [0002] In the field of fresh-keeping storage and quick-freezing of food, due to the low temperature and high humidity conditions, the surface of the air cooler is prone to frosting. The growth of the frost layer increases the heat transfer resistance and flow resistance between the evaporator and the low-temperature environment, making it difficult to maintain the required low-temperature environment, which affects the storage quality and freshness of food. In order to maintain the low-temperature working condition of the storage space, it is necessary to Periodic defrosting is performed on the surface of the evaporator to reduce heat transfer resistance and flow resistance. [0003] At present, most of t...

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Problems solved by technology

[0003] At present, most of the defrosting methods in the cold storage are hot ammonia defrosting, hot water defrosting, manual defrosting, etc., which may easily cause storage temperature fluctuations, affect the quality of food storage, and may cause corruption and deterioration of items in severe cases

In addition, after the defrosting is completed, the liquid droplets remaining on the fin surface freeze rapidly when the unit resumes cooling, forming a layer of dense ice layer on the fin surface (called fin surface re-icing phenomenon), which rapidly reduces the performance of the unit

During the defrosting process, the heat of defrosting mainly comes from the power consumption of the compressor, so the energy consumption of defrosting is relatively high, and the high and low pressure switching of the system causes thermal shock to all components of the system, which reduces the reliability and service life of the refrigeration system

[0004] If the relative humidity of the storage environment is high, the speed of frosting on the surface of the air cooler will increase accordingly, resulting in shortened defrosting intervals

Frequent temperature fluctuations will seriously affect the storage quality of food, resulting in increased defrosting power consumption

[0005] The existing defrosting structure has the problem of high energy consumption. In addition to the problem of high energy consumption, the existing cold storage also has problems such as large storage temperature fluctuations and low system reliability.

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