Novel defrosting system and control method thereof

Abstract

The invention discloses a novel defrosting system and a control method thereof. The novel defrosting system comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, an electronic expansion valve and an indoor heat exchanger, an air outlet and an air inlet of the compressor are connected through a second air return pipeline, and an electromagnetic valve device is arranged on the second air return pipeline. A novel defrosting method of an air conditioner includes the steps of (1) thin frost and thick frost detection and judgment, and (2) defrosting: when judgment is thin frost, adopting a thin frost removal mode, and when judgment is thick frost, adopting a thick frost removal mode. By the novel defrosting system and the control method thereof, the thin frost and the thick frost can be distinguished automatically, different defrosting modes are adopted for the thin and thick frost to allow indoor temperature to be more stable, defrosting effect is better, and waiting time of customers is shortened.

Description

technical field [0001] The invention belongs to the field of air conditioners, and in particular relates to a novel defrosting system and a control method thereof. Background technique [0002] In winter or when the ambient temperature is low or the humidity is high, since the evaporation temperature of the air conditioner is lower than the dew point of the air conditioner, it will condense into water on the outside condenser of the air conditioner, and the heat exchange efficiency of the heat exchanger will be affected by the low evaporation temperature. The evaporation temperature is lower, and when it reaches below zero, frost or even ice will form on the outside. The current heat pump air conditioner has a defrosting function, that is, it runs cooling to defrost during the heating operation. Through the cooling operation, the outer heat exchanger is a condenser, and its condensation temperature is greater than zero, and the frost will melt, thereby achieving defrosting. ...

AI Technical Summary

Problems solved by technology

But our existing defrosting method will stop the compressor, then switch the four-way valve to switch to cooling operation, and at the same time, the indoor fan will stop running, which will cause the indoor temperature to be unstable.

In addition, due to the defrosting procedure of some air conditioners, the defrosting will not be clean. In this case, it is easy to defrost frequently, and the indoor temperature changes greatly, which makes people feel uncomfortable.

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