Flash evaporation super-cooling air-admission electric automobile waste heat recovery heat pump type integrated thermal management system

Abstract

The invention provides a flash evaporation super-cooling air-admission electric automobile waste heat recovery heat pump type integrated thermal management system. The system comprises an electric compressor, a four-way reversing valve, a vehicle interior air-conditioning heat exchanger, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a vehicle exterior air-conditioning heat exchanger, a driving motor waste heat recovery heat exchanger, a driving motor heat exchanger, a motor water pump, a flash evaporation super-cooling air-admission device, a first solenoid valve, a second solenoid valve, a third solenoid valve, a multi-inlet gas-liquid separator and a thermal management controller. By employing the integrated thermal management system, integrated thermal management on a vehicle power system and the vehicle interior thermal environment is carried out; waste heat of a driving motor of an electric automobile and a power battery system is recovered; flash evaporation super-cooling air-admission automatic control is realized; the energy efficiency of the system is improved; the load of the vehicle exterior heat exchanger during a heating process is reduced; the thermal safety of a driving motor system and the power battery system is guaranteed; and damage to the driving motor system and the power battery system is prevented. The integrated thermal management system is low in cost, is high-efficient and energy-saving, has reliable performance, and is convenient to maintain.

Description

technical field [0001] The invention relates to an electric vehicle technology, in particular to an electric vehicle waste heat recovery heat pump type comprehensive heat management system for flash supercooling and supplementing air. Background technique [0002] Electric vehicles have become the focus and focus of global development. At present, electric vehicles generally use electric heater PTC to heat in winter, but its efficiency is low, which seriously affects the mileage of electric vehicles on a single charge, causing the mileage of vehicles in winter to be 30% shorter than that in summer. Therefore, the air source heat pump system technology has received great attention at home and abroad. [0003] After searching the literature of the prior art, it is found that when the existing air source heat pump technology is applied to electric vehicles, the waste heat of the drive motor cannot be recovered and utilized; the frosting problem of the external heat exchanger c...

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it is found that when the existing air source heat pump technology is applied to electric vehicles, the waste heat of the drive motor cannot be recovered and utilized; the frosting problem of the external heat exchanger cannot be solved under the heating operation in winter. It is also impossible to defrost and defog during heating operation; the system structure is complex

Therefore, the existing air source heat pump technology cannot meet the application requirements of electric vehicles

Other heat pump systems that recover waste heat from motors cannot meet the different requirements of the system for the charging amount of working fluid in heating and cooling operations.

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