Heat pump water heater outdoor unit and heat pump water heater

摘要

It can be prevented with providing outdoor unit (100) and the Teat pump boiler of Teat pump boiler, even if in natural water water supply capacity in low ambient temperature. The outdoor unit of Teat pump boiler, whereinCompressor (3), water heat exchanger (2), the first expansion valve (7), air heat exchanger (1) and pipeline, including the refrigerant air heat exchanger and compressor between water heat exchanger and the first expansion valve provided between inner heat exchanger (9) and for carrying out heat exchange between refrigerant between water heat exchanger and the first expansion valve, the first inner heat exchanger at point and the first expansion valve between injection circuit (13) branch and enters the refrigerant of compressor to inject and pass through the second expansion valve (8); Heat exchange is carried out between the refrigerant of second inner heat exchanger (10), in the injection circuit of the first inner heat exchanger and the first expansion valve and the refrigerant expansion valve and compressor that flow between second.