Defrosting control method for variable-capacity compressor system

Abstract

The invention provides a defrosting control method for a variable-capacity compressor system. The variable-capacity compressor system comprises a variable-capacity compressor, a four-way valve, as well as a first control tube and a second control tube which are selectively connected with a variable-capacity control port of the variable-capacity compressor through a variable-capacity switchover valve. The method comprises the step of after detecting and knowing that the variable-capacity compressor system runs in a defrosting manner and first preset conditions are reached, controlling the variable-capacity switchover valve to connect the first control tube or the second control tube with the variable-capacity control port, so as to enable the variable-capacity compressor to work in a first defrosting mode with a plurality of working cylinders. According to the defrosting control method for the variable-capacity compressor system, which is provided by the invention, after the defrosting running is completed and the first preset conditions are reached, the variable-capacity switchover valve is controlled to introduce a high pressure, thus the variable-capacity compressor works in the first defrosting mode with the plurality of working cylinders, and then a refrigerant circulation quantity is increased, a defrosting speed is increased, and the great lowering of an indoor environment temperature due to a too long defrosting time is avoided.

Description

Technical field [0001] The invention relates to the field of air conditioning, and in particular to a defrosting control method for a variable capacity compressor system. Background technique [0002] The existing air conditioning system uses a four-way valve reversing method for defrosting. The disadvantage of this defrosting method is that during the defrosting process, the low-temperature refrigerant absorbs heat from the room through the internal machine evaporator. If the defrosting time is too long, it will This leads to a large decrease in the indoor environment temperature, which affects user comfort. Summary of the invention [0003] The invention aims to provide a defrosting control method for a variable capacity compressor system capable of increasing the defrosting speed. [0004] The present invention provides a defrosting control method for a variable capacity compressor system. The variable capacity compressor system includes a variable capacity compressor, a four-wa...

AI Technical Summary

Problems solved by technology

[0002] The existing air-conditioning system uses the four-way valve reversing method to defrost. The defect of this defrosting method is that during the defrosting process, the low-temperature refrigerant absorbs heat from the room through the internal evaporator. If the defrosting time is too long, the Lead to a large drop in indoor ambient temperature, affecting user comfort

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