Water machine anti-freezing control method and system, and air conditioning device

Abstract

The present invention discloses a water machine anti-freezing control method. The method comprises: obtaining the current heat exchanger usage state in the operation mode and the running mode; when the running mode is in the cooling mode or the cooling-heating water mode, and when the coating water temperature of the air conditioning heat exchanger is lower than a preset lowest value, controlling the air conditioning heat exchanger to perform automatic reset protection for limited times; when the heat exchanger is not used in the running mode, controlling the water pump of the heat exchanger into the running state and going on for a preset time, if the water inlet temperature is lower the lowest value, controlling the stopping of the machine and controlling to enter the running mode corresponding to the heat exchanger to improve the water inlet temperature of the heat exchanger. The water machine anti-freezing control method can perform different anti-freezing protection aiming at different running modes to ensure that the system can stably operate in each mode so as to improve the stability and the reliability. The present invention further discloses an air conditioning device of the water machine anti-freezing control system and comprising the same.

Description

Technical field [0001] The invention relates to the technical field of air conditioning control, and more specifically, to a method and system for antifreeze control of a water machine. In addition, the present invention also relates to an air conditioner including the above-mentioned water machine antifreeze control system. Background technique [0002] Air-conditioning products can be divided into air coolers and water chillers according to their use side. Among them, since the use side is water, the water chiller will freeze when the water temperature is lower than 0℃. The density of ice is lower than that of water. When it becomes ice, the volume will increase, which will freeze and crack the water-side heat exchanger of the air conditioner and its connecting water pipe. Therefore, the water chiller must consider the issue of antifreeze. [0003] For some special machines, such as a full heat recovery type chiller, since it has two water-side heat exchangers, it is necessary t...

AI Technical Summary

Problems solved by technology

There are more operating modes than conventional machines. In some modes, one of the heat exchangers is not used. The unused heat exchangers also need to be protected against freezing. Simple methods cannot ensure that the machine will not be cracked by freezing

Images