A low-temperature refrigeration control method, a low-temperature refrigeration control device, and an air conditioner

Abstract

The invention relates to a low-temperature refrigeration control method, a low-temperature refrigeration control device, and an air conditioner. The low-temperature refrigeration control method includes: in the low-temperature refrigeration mode, detecting the inlet temperature T0 of the indoor side heat exchanger of the air conditioner; judging whether T0 is greater than the first The preset temperature is less than or equal to the second preset temperature; when the judgment result is that T0 is greater than the first preset temperature and less than or equal to the second preset temperature, it is determined that the air conditioner enters the low-temperature cooling mode. The low-temperature refrigeration control method provided by the present invention, the low-temperature refrigeration control device and the air conditioner detect the inlet temperature T0 of the heat exchanger on the indoor side of the air conditioner in the low-temperature refrigeration mode, and judge that when T0 is greater than the first preset temperature, And when the temperature is less than or equal to the second preset temperature, it is determined that the air conditioner enters the low-temperature refrigeration mode to operate, so that the low-temperature refrigeration output capacity of the air conditioner can be accurately controlled to ensure the user's demand for low-temperature refrigeration.

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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