Performance research of DC variable speed air-source heat pump with double conditions

Aiming at the energy consumption caused by compressor being started and stopped frequently under multiple conditions and the good conversion characteristics of compressor with DC variable speed control in different conditions, designs a DC variable speed control air-source heat pump to meet two different conditions: air conditioning and domestic hot water generation. The experimental results show that the two conditions can be switched over freely, different frequency operation of compressor can satisfy the load demand in the refrigeration, heating and hot water system under high temperature environmental conditions, and the operation of the unit is stable, high efficiency, energy saving.