Refrigeration unit, defrosting control method and device

Abstract

The invention provides a refrigerating unit, defrosting control method and device, wherein the refrigerating unit comprises: an air supply infrared sensor group located on the air supply side of the evaporator; a windward infrared sensor group located on the windward side of the evaporator The center line infrared sensor group is located on the center line of the evaporator; the controller is used to transmit signals according to whether the air supply infrared sensor group, the windward infrared sensor group and the center line infrared sensor group can normally transmit signals , to defrost control the evaporator. The above method solves the problem of low unit reliability caused by inaccurate defrosting control, and achieves the technical effect of precisely controlling the defrosting time point and improving the reliability of the unit.

Description

technical field [0001] The invention relates to the technical field of equipment control, in particular to a refrigeration unit, a defrosting control method and a device. Background technique [0002] The finned coil heat exchanger of the air cooler for refrigeration is used as an evaporator in the cold storage. Due to the low evaporation temperature, the temperature on the surface of the coil will be relatively low. When the coil is lower than 0°C, when the air in the cold storage is driven by the fan and contacts the coil, the moisture contained in the air will precipitate and adhere to the surface of the coil to form a frost layer. With the excessive thickening of the frost layer, the performance of the unit will decrease and the working conditions will deteriorate. Therefore, defrosting is an unavoidable problem for air coolers (that is, air coolers) used in cold storage. [0003] On the issue of defrosting, when to enter defrosting and when to exit defrosting requires...

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Problems solved by technology

[0003] On the issue of defrosting, when to enter defrosting and when to exit defrosting requires precise control. If the defrosting is clean and the defrosting has not been exited, then it is easy to cause the heat of defrosting to enter the indoor environment and cause the internal temperature to rise , reduced energy efficiency

If the frost is too thick and the unit still does not enter the defrosting, it will lead to poor operating conditions of the unit and damage the reliability of the unit

[0004] In view of the above problems, no effective solution has been proposed

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