Double resource composite heat pump unit

Abstract

The heat pump set includes compressor, four-way diversion valve, indoor heat exchanger, and outdoor composition type heat exchanger. The outdoor type heat exchanger is produced from finned coils and smooth pipe set in tandem. Through air pipes and valves, the outdoor type exchanger is connected to four-way diversion valve. Through liquid pipe and valves, the outdoor type exchanger is connected to indoor heat exchanger, which is different from the outdoor type exchanger in that hot water radiator is setup inside the outdoor composition type heat exchanger so as to form dual sources outdoor composition type heat exchanger. Through circulation pipes and pump, the hot water radiator is connected to solar collector. In summer, water spraying and wind cooled composition cooling mode is adopted in order to raise energy efficiency ratio of season. In winter, solar collector heats hot water radiator to raise temperature of air flowing along heat exchanger in order to save energy.

Description

technical field [0001] The invention relates to a dual-source composite heat pump unit for an indoor air-conditioning system, which is applicable to heat-pump cold and hot water units, unitary heat-pump air-conditioning units and household central air-conditioning units. Background technique [0002] The existing air-cooled heat pump unit is mainly composed of a compressor, a four-way steering valve, a vapor-liquid separator, a liquid receiver, indoor and outdoor heat exchangers and some valve parts connected by refrigerant gas and liquid pipelines. The outdoor heat exchanger is an air-cooled finned coil heat exchanger. Due to the high dry bulb temperature of the outdoor air in summer, the cooling effect becomes poor, so the condensation pressure in the air-cooled heat exchanger varies with the dry bulb temperature of the air. In winter, the outdoor air temperature is low and the humidity in the outdoor air is high, which will lead to serious frosting of the outdoor air-cool...

AI Technical Summary

Problems solved by technology

However, when the outdoor air temperature of this unit is low in winter, such as in the winter season in the area north of the Yangtze River Basin in my country, due to the low calorific value of the outdoor air, the heating effect of the unit will become worse as the temperature drops. The unit cannot work normally with the help of other heat sources. At present, electric auxiliary heating is usually used, but this heating method not only consumes a lot of energy, but also has a low seasonal energy efficiency ratio.

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