Heat-accumulating-type heat pump system for vehicle

Abstract

The invention discloses a heat-accumulating-type heat pump system for a vehicle. The heat-accumulating-type heat pump system comprises three subsystems: a refrigerant circulation system, a secondary circuit circulation system and a heat accumulating circulation system; the secondary circuit system comprises a second circulation pump, a first heat exchanger, a sixth heat exchanger, a temperature air door and a kettle; the second circulation pump, the first heat exchanger, the sixth heat exchanger and the kettle are sequentially connected through a pipeline to form a cycle; and the sixth heat exchanger and the temperature air door are located in an air handling unit. The secondary circuit system is adopted, thus the heating capacity of the heat pump system can be excavated better, meanwhile, the pressure of the high-pressure side of the refrigerant circulation system is lowered, the ratio of the high pressure to the low pressure of the system is also decreased, and the operating environment of a compressor is improved, especially when the compressor continuously works under a heat pump mode for a long time.

Description

technical field [0001] The invention belongs to the technical field of automobiles, in particular, it relates to a kind of vehicle heat storage which uses heat storage technology for new energy vehicles under specific conditions, rationally utilizes waste heat resources, and uses waste heat for passenger car heating through a refrigerant circulation system type heat pump system. Background technique [0002] At present, under low ambient temperature, due to the absence of high-temperature heat sources, new energy vehicles mainly use PTC electric heating for heating. Although electric heating can meet the heating demand, it consumes battery power and greatly sacrifices battery life. This is bound to It is contrary to the current policy requirements, and also contrary to the basic functional needs of market customers. Therefore, how to improve the heating capacity and heating efficiency of new energy vehicles, taking into account the cooling and dehumidification capacity, wit...

AI Technical Summary

Problems solved by technology

[0004] First, when new energy vehicles use heat pumps for heating, the refrigerant flow paths in the cooling and heating cycle systems are different, and there will be more control mechanisms, pipelines, and refrigerant charging volumes, making the control more complicated and increasing equipment and cost

[0005] Second, when new energy vehicles use heat pumps for heating, the heating capacity is insufficient at low ambient temperatures to meet the comfort requirements of the passenger compartment

[0006] Third, when new energy vehicles use heat pumps for heating, the outdoor heat exchanger is prone to frosting. When the refrigerant circulation system operates in the defrosting mode, the liquefied water droplets from the surface of the heat exchanger blow to the fan blades, and the dynamic balance of the fan blades fails. The noise becomes louder, especially when the car is running at high speed, which will reduce the service life of the fan

[0007] Fourth, when new energy vehicles only use PTC electric heating for continuous heating, the power consumption is relatively large, resulting in a significant reduction in vehicle endurance

[0008] Fifth, when the new energy vehicle adopts PTC electric heating, the contact part between the PTC electric heater and the air-conditioning box is heated intensively. After the plastic melts, the hot air blown out of the car has a certain plastic smell, which affects the user experience, and continues to High temperature will melt through the air conditioner box, causing air leakage and heat leakage

[0009] Sixth, when the speed of the vehicle changes, the residual heat of the motor, controller, and charger is unstable, making it difficult to use the residual heat in real time

Images