AIR-CONDITIONING APPARATUS

摘要

An air-conditioning apparatus includes a refrigerant circuit formed by connecting pipes, a compressor including a compression chamber and an injection port through which refrigerant is introduced into the compression chamber, a first heat exchanger, a subcooling heat exchanger that includes a first flow passage and a second flow passage and exchanges heat between refrigerant flowing in the first flow passage and refrigerant flowing in the second flow passage to subcool the refrigerant flowing in the first flow passage, a first expansion device, a second heat exchanger, and an accumulator In addition, a first bypass pipe connects the second flow passage of the subcooling heat exchanger with a segment of the pipes, positioned on a refrigerant inflow side of the accumulator; an expansion device to adjust a flow rate of the refrigerant flowing in the first bypass pipe; a second bypass pipe that connects a segment of the pipes with the injection port, the segment being positioned between the first heat exchanger and the second heat exchanger; and an expansion device to adjust a flow rate of the refrigerant flowing in the second bypass pipe.

主权项

1. An air-conditioning apparatus including a refrigerant circuit formed by connecting, with pipes,
a compressor including a compression chamber and an injection port through which refrigerant is introduced into the compression chamber, the compressor being configured to compress refrigerant and discharge the compressed refrigerant, a first heat exchanger that exchanges heat with the refrigerant, a subcooling heat exchanger that includes a first flow passage and a second flow passage and exchanges heat between a portion of the refrigerant flowing in the first flow passage and another portion of the refrigerant flowing in the second flow passage to subcool the portion of refrigerant flowing in the first flow passage, a first expansion device to decompress the refrigerant, a second heat exchanger that exchanges heat with the refrigerant, and an accumulator connected to a suction side of the compressor and configured to store excess refrigerant, so that the refrigerant is circulated through the refrigerant circuit, the air-conditioning apparatus comprising: a first bypass pipe that connects the second flow passage of the subcooling heat exchanger with a segment of the pipes, the segment being positioned on a refrigerant inflow side of the accumulator; a second expansion device to adjust a flow rate of the refrigerant flowing in the first bypass pipe; a second bypass pipe that connects a segment of the pipes with the injection port, the segment being positioned between the first heat exchanger and the second heat exchanger; and a third expansion device to adjust a flow rate of the refrigerant flowing in the second bypass pipe.