Defrosting control method and system and air conditioner

Abstract

The invention provides a defrosting control method and system and an air conditioner. The defrosting control method comprises the steps that the air conditioner detects system parameters under the heating mode; if the system parameters achieve the preset defrosting condition, a stop valve is controlled to be closed, and an electric heating part works; the work duration of the electric heating part is recorded, the temperature of a heat storage device is detected, the temperature T0 of the heat storage device after the first preset duration and the temperature Ti of the heat storage device after the second preset duration are recorded, if the temperature difference of the heat storage device is larger than the preset temperature difference, the electric heating part is controlled to stop working, the stop valve is started, a four-way valve is reversed to enable the air conditioner to carry out defrosting under the refrigeration mode, or, ending is carried out; according to the defrosting control method, the air conditioner performs defrosting under the heating mode, the good defrosting effect and the good heating effect are ensured, use comfort of a user is improved, when the temperature rise of the heat storage device is high, and the heat storage material is not sufficient, the four-way valve is reversed to enable the air conditioner to carry out defrosting under the refrigeration mode, the good defrosting effect is ensured, and the use satisfaction of the user is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a defrosting control method, a defrosting control system and an air conditioner. Background technique [0002] The air conditioner in the related art usually uses the discharge temperature of the compressor to perform hot air defrosting. When defrosting starts, the four-way valve is reversed so that the outdoor heat exchanger releases heat, and the indoor heat exchanger absorbs heat, resulting in indoor ambient temperature. In this way, in a colder environment, the air conditioner runs a refrigeration cycle, which will cause the room temperature to be hot and cold, affecting the comfort of the user; When the upper part has been defrosted, it must wait until the lower part of the outdoor heat exchanger is completely defrosted to complete the defrosting and enter the normal heating operation state at the same time, so part of the heat is wasted and the defrosting process i...

AI Technical Summary

Problems solved by technology

[0002] The air conditioner in the related art usually uses the discharge temperature of the compressor to perform hot air defrosting. When defrosting starts, the four-way valve is reversed so that the outdoor heat exchanger releases heat, and the indoor heat exchanger absorbs heat, resulting in indoor ambient temperature. In this way, in a colder environment, the air conditioner runs a refrigeration cycle, which will cause the room temperature to be hot and cold, affecting the comfort of the user; When the upper part has been defrosted, it must wait until the lower part of the outdoor heat exchanger is completely defrosted to complete the defrosting and enter the normal heating operation state at the same time, so part of the heat is wasted and the defrosting process is prolonged. Reduced heating capacity and reduced overall heating effectiveness

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