Air conditioner cooling unit and anti-freezing control method thereof

Abstract

The invention provides an air conditioner cooling unit and an anti-freezing control method thereof. The air-conditioner cooling unit comprises at least three temperature sensors. The anti-freezing control method comprises collecting the temperatures of the temperature sensors, and when all the temperature sensors break down, entering an anti-freezing mode; if at least one of the collected temperatures is lower than a first temperature threshold, entering the anti-freezing mode; when all the collected temperatures are higher than a second temperature threshold, exiting the anti-freezing mode. According to the air conditioner cooling unit, the water inlet, the water outlet and the inside of the shell tube of a shell-tube heat exchanger are provided with the temperature sensor, so that anti-freezing failure due to drifting or fault of certain temperature sensors can be avoided, effective anti-freezing effects on the shell-tube heat exchanger can be achieved, and the reliability of the shell-tube heat exchanger of the air conditioner cooling unit can be improved.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioner refrigeration unit and an antifreeze control method thereof. Background technique [0002] The heat exchangers of current air conditioner refrigerating units mostly use shell-and-tube heat exchangers, which may be frozen and cracked if the water in them is not discharged in time when the heat exchanger is operated in a low-temperature environment such as winter. In addition, if the heat exchange of the refrigerant is too large and the temperature of the chilled water is too low, it may also cause the shell-and-tube heat exchanger to rupture. [0003] At present, the shell-and-tube heat exchangers of general air conditioner refrigeration units only use one antifreeze temperature-sensing package for antifreeze detection, and the antifreeze temperature-sensing package is generally arranged in the shell tube of the shell-and-tube heat exchanger. The antifreeze cont...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the antifreeze control of the air conditioner refrigeration unit may fail, the present invention provides a new air conditioner refrigeration unit and its antifreeze control method. The air conditioner refrigeration unit is equipped with three temperature sensors to detect the temperature of the shell-and-tube heat exchanger. temperature, which can ensure accurate entry into the antifreeze mode, and avoid the problem that the temperature sensor temperature is inaccurate and the antifreeze control fails

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