An air source heat pump system that recycles waste heat from compressors

Abstract

The invention relates to an air-source heat pump system for recycling waste heat of a compressor. Thermal storage media are arranged on the outer wall of the compressor and used for storing the waste heat of the compressor. Whether a fifth solenoid valve is turned on or turned off is judged according to the change of the temperature of the thermal storage media. When the temperature in the thermal storage media is low, the fifth solenoid valve is turned off, and the system operates in a traditional heating cycle mode. Therefore, the system can efficiently recycle the waste heat of the compressor, so that the compressor is cooled down well, and the service life of the refrigerating compressor is prolonged. When an outdoor heat exchanger frosts, the waste heat of the compressor can be used for defrosting. When the system needs to be defrosted, the heat stored in the thermal storage media arranged on the outer wall of a heating cavity of the compressor in a filling mode is used as a low-temperature heat source, evaporation and heat absorption are conducted in the thermal storage media, and the heat is compressed by the compressor and released in the outdoor heat exchanger for defrosting; consequently, energy consumed by a traditional air-source heat pump system in the defrosting process is reduced, and the efficiency and stability of an air-source heat pump in a low-temperature environment are improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to an air source heat pump system for recovering and utilizing waste heat of a compressor. Background technique [0002] The air source heat pump has the advantages of both cooling and heating, small footprint, energy saving, environmental protection, and convenience, and is favored by more and more people. As the core component of the heat pump system, the compressor plays a vital role in the operation of the system. During the actual working process of the compressor, due to the temperature rise of the gaseous refrigerant after being compressed, and the friction between the compression process and the cylinder wall, the temperature of the cylinder wall is relatively high, and heat is emitted to the outdoor environment. This part of heat has not been effectively and rationally utilized at present, resulting in a waste of energy. In addition, when the o...

AI Technical Summary

Problems solved by technology

When the air source heat pump is operating under frosting conditions, as the frost layer thickens, the heating performance of the heat pump system will become worse and worse, and the heating capacity will drop sharply as the outdoor temperature drops, especially in cold weather. In the northern region and the high-humidity and cold south, frequent compressor shutdown or low-voltage protection may affect the use of the phenomenon, seriously restricting the development of air source heat pumps

Images