Economical heat pump system with waste heat recovery function

[0002] The electric vehicle industry is developing rapidly, but due to the characteristics of batteries and the diversity of electric vehicle application environments, it is currently difficult for electric vehicles to be widely used in severe cold areas and hot areas, or to run over long distances; traditional electric vehicle air conditioning systems generally use air conditioning refrigeration + Auxiliary PTC method is used to realize the cooling and heating of the passenger compartment. This system structure heating method has low energy efficiency and has a great impact on the cruising range of the vehicle. This heating method consumes 1KW of electric energy and can only generate 1KW of heat; Two types of heat pump heating and air-conditioning systems. The first type of air-conditioning system absorbs heat from the outside and releases it to the passenger compartment through the built-in condenser of the heat pump. However, the system is complicated because the cycle of the system determines that the external heat exchanger The last process cannot be used; the second type of heat pump air-conditioning system uses the waste heat recovery device to recover heat, but absorbs heat indirectly from the atmosphere, in which the heat from the outside air is sent to the radiator to the waste heat recovery device to the heat pump and finally sent to the passenger compartment; this This method uses two heat exchangers, the heat is exchanged twice, and the efficiency is low