Control method for defrosting without shutdown and refrigeration device

Abstract

The invention discloses a control method for defrosting without shutdown and a refrigeration device. The control method comprises the steps that a conventional refrigeration mode is executed, a refrigerant sequentially flows through at least two evaporators, and throttling is carried out through a throttling device before the refrigerant flows into the first evaporator; operation parameters of theconventional refrigeration mode are detected, and whether the operation parameters meet preset defrosting conditions or not is judged; and if yes, a defrosting refrigeration mode is executed, the refrigerant flows into the first evaporator from a bypass pipeline, and throttling is carried out through the throttling device before the refrigerant flows into the remaining evaporators. According to the control method for defrosting without shutdown and the refrigeration device, the high-temperature refrigerant which is not throttled is directly fed into the first evaporator, so that a frost layeron the surface of the refrigerant is melted, the refrigerant is throttled through the throttling device before flowing into the remaining evaporators, compensation refrigeration is carried out on circulating air, low-temperature air supply is maintained, and therefore the temperature in the refrigeration device is kept at a low temperature.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a non-stop defrosting control method and refrigeration equipment. Background technique [0002] At present, when defrosting refrigeration equipment such as air curtain cabinets on the market, whether it is intelligent defrosting that uses temperature as the entry condition of defrosting or interval defrosting that takes time as the entry condition of defrosting, it is necessary to close the liquid supply solenoid valve. , the system stops cooling, the fan continues to run, and only uses the frost layer temperature (0°C) to cool the circulating air. Due to the small heat transfer coefficient of the frost layer and the uncontrollable heat transfer temperature difference between it and the circulating air, the temperature of the air supply to the cabinet will rise uncontrollably, causing the temperature inside the cabinet to rise to about 11°C. At this time, the tem...

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Problems solved by technology

[0004] In order to solve the defect that the existing air curtain cabinet stops cooling during defrosting, causing the temperature in the cabinet to rise sharply, the present invention proposes a non-stop defrosting control method and refrigeration equipment, so that the refrigeration equipment does not need to stop refrigeration during defrosting, The evaporator can continue to cool the circulating air, and control the circulating air to always send air at a lower temperature to maintain a low temperature environment in the cabinet

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