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Heatful System-Heat Pump
It is known lhat heat pump unit`s capacity reduces when ambient temperature drops. Especially at ambient temperature below -7°C, some heat pump units even less than 50% of its rated capacity (at ambient temperature +7 °C). By using the latest EVi technology, heatFUL unit can always provide your house with stable heating output, to minimize your energy consumption in cold winter. Moreover, with its DC inverter technology, compressor can adjust its working speed according to heating demands automatically, to optimize the efficiency of the whole system all over the year.
Introduction of EVI technology
The vapor injected-scroll compressor can help customer increasing the heating capacity and heating COP value with smaller size of the compressor for low ambient application.
Working principle of EVI system
The injection system has 2 additional parts which is injection heat exchanger and electronic expansion valve(EEV2)
1) Injection Heat Exchanger is used to provide additional subcooling which helps increasing heating capacity of the system.
2) Electronic Expansion Valve (EEV2) is used to control the amount of evaporated refrigerant that flows to the compressor. Even though, this injection would need more input power of the compressor, but the heating capacity would increase even higher enough to make input power cost nothing. Consequently, the total efficiency of the injection system is still increasing.
State 1: Suction Pressure
State 2: Discharge Pressure
State 3: Subcooled refrigerant leaving the condenser.
State 4: Subcooled refrigerant leaving the injection heat exchanger of main circuit
State 5: Refrigerant from the injection heat exchanger is expanded by EEV1.
State 6: Refrigerant from the condenser is expanded by EEV2.
State 7: Saturated vapor inject to compressor.
