As a key component of new energy vehicles, electric air conditioning system has made great progress with the technological progress of new energy vehicle industry.
At present, cool and heat (non heat-pump) A/C system heated by PTC is highest proportion and widely used. This scheme is simple and reliable, but the biggest disadvantage of PTC heating is low thermal efficiency. The energy consumption of the A/C system costs about 25-30% of the total energy consumption of the whole electric vehicle, and the low energy efficiency of the A/C system has an adverse impact on the mileage.
More and more car industries are now using PTC assisted heat-pump A/C systems. Due to the use of heat-pump technology, the energy efficiency of heating has been improved. However, in the environment where the temperature is lower than - 5 ℃ , due to the increase of specific volume of refrigerant, the decrease of refrigerant flow rate, the increase of compression ratio of compressor, the increase of shell temperature and the rapid reduction of heating capacity, PTC assisted heating must be used to meet the comfort requirements.
To solve not only the problem of insufficient heating capacity, but also the problem of high temperature of compressor shell in low temperature working environment, the heat-pump A/C system with Enhanced Vapor Injection Compressor emerge as the times require.
Typical Application Case - 3D of heat-pump system
We R&D Enthalpy-enhancing Heat-pump System independently.After years of verification, we have achieved batch customers in OEM industry, according to customers' responses, the use of results are excellent.We are applying invention patents for Enhanced Vapor Injection Compressor & 4 Way Valve.
To operate the system with R134a refrigerant under working condition(Evap. Temp. -15℃ , Before Valve 35℃ , Superheat 10℃),it is the working condition according to the national standard of“low temperature heat pump working condition” . The Enthalpy-enhancing A/C System is providing 3 times more heat than PTC heater, COP reached 3.0. Mileage range of the pure electric vehicle was increased by 16.7% under the environment of -20~-25.
We supply whole Enthalpy-enhancing Heat-pump System, include Enhanced Vapor Injection Compressor, 4 way valve,and a multifunctional integrator that integrates functions such as flash dryer, accumulator, filter, expansion valve, etc.
Integrated design of 4 way valve and compressor
Typica l Applicatio n Case - Coo li ng Mode
Typica l Applicatio n Case - Heati ng Mode
