An air-conditioning system and anti-freezing method thereof

Abstract

The invention discloses an air conditioning system and an anti-freezing control method thereof. According to the system and the method, an external environment temperature, an internal environment temperature, an inner fan wind grade and an outer fan wind grade are detected, corresponding detection values are distributed in corresponding sections An, Bn, Cn and Dn, the An, the Bn, the Cn and the Dn are permutated and combined to obtain N kinds of results, En is used for representing each result value, and the En values correspond to a corresponding different first preset low-pressure value Px,a corresponding different first preset time value Tm, a corresponding different second preset low-pressure value Py and a corresponding different second preset time value Ta. The optimal Px value, Tmvalue, Py value and Ta value are confirmed after a lot of experiments, so that the condition that the system enters an anti-freezing condition and the condition that the system exits from the anti-freezing condition are confirmed, the good anti-freezing effect can be achieved, and the problem that the system carries out defrosting in the situation that frost does not exist can be avoided.

Description

technical field [0001] The invention relates to an air-conditioning system and its anti-freezing method, in particular to an air-conditioning system and its anti-freezing method in the refrigeration process. Background technique [0002] In the use of air conditioners, frosting of evaporators in cooling mode is a common problem. Most designers now install a temperature-sensing package on the evaporator, use the temperature-sensing package to collect the evaporator tube temperature, and use the evaporator tube temperature control system to enter or exit the anti-freezing mode. Although this method can also achieve the anti-freezing effect, it has the following disadvantages: 1) the anti-freezing cost of using the anti-freezing temperature sensing package is relatively high; 2) the anti-freezing temperature sensing package will affect its use because it works in an alternating cold and hot environment Life, and the temperature sensing package is prone to failure, and problems...

AI Technical Summary

Problems solved by technology

Avoid the problem of defrosting the whole machine due to the reliability of the temperature sensing package

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