Cryogenic refrigeration control method, cryogenic refrigeration control device and air conditioner

Abstract

The invention relates to a cryogenic refrigeration control method, a cryogenic refrigeration control device and an air conditioner. The cryogenic refrigeration control method includes the steps of detecting the inlet temperature T0 of an indoor heat exchanger of the air conditioner in the cryogenic refrigeration mode; judging whether T0 is greater than the first preset temperature and smaller than or equal to the second preset temperature; and confirming that the air conditioner is operated in the cryogenic refrigeration mode when T0 is greater than the first preset temperature and smaller than or equal to the second preset temperature. According to the cryogenic refrigeration control method, the cryogenic refrigeration control device and the air conditioner, the inlet temperature T0 of the indoor heat exchanger of the air conditioner is detected in the cryogenic refrigeration mode, users can confirm that the air conditioner is operated in the cryogenic refrigeration mode when T0 is greater than the first preset temperature and smaller than or equal to the second preset temperature, and therefore the cryogenic refrigeration output capacity of the air conditioner can be accurately controlled, and the requirements of the users for cryogenic refrigeration can be met.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a low-temperature refrigeration control method, a low-temperature refrigeration control device and an air conditioner. Background technique [0002] Traditional household air conditioners do not have precise control over low-temperature cooling, and some even have no cooling capacity when working at low temperatures. In addition, under normal circumstances, the inverter compressor can operate in a relatively large frequency range, but at ultra-low outdoor ambient temperatures, due to the better heat exchange effect of the outdoor side heat exchanger of the air conditioner, the refrigerant will enter the outdoor side for exchange. The temperature of the heater quickly approaches the ambient temperature, and the pressure drops sharply, which leads to a decrease in the amount of refrigerant entering the indoor side, and the temperature of the refrigerant entering the indoor...

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Problems solved by technology

[0002] Traditional household air conditioners do not have precise control of low-temperature refrigeration, and some even have no cooling capacity when working at low temperature

In addition, under normal circumstances, the inverter compressor can operate in a relatively large frequency range, but at ultra-low outdoor ambient temperatures, due to the better heat exchange effect of the outdoor side heat exchanger of the air conditioner, the refrigerant will enter the outdoor side for exchange. The temperature of the heater quickly approaches the ambient temperature, and the pressure drops sharply, which leads to a decrease in the amount of refrigerant entering the indoor side, and the temperature of the refrigerant entering the indoor side may be lower than the outdoor ambient temperature, so it is easy to cause frosting on the heat exchanger and freeze, further affecting cooling capacity

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