FOSHAN SUOHER ELECTRICAL APPLIANCE CO., LTD
EVI Low Temperature Air Source Heat Pump (16kW-20kW)
The EVI Heat Pump (Jet Enthalpy Boost) technology significantly enhances heating efficiency and system stability in low-temperature environments by optimizing compressor operation, with its core feature being high-efficiency heating in extreme cold. The low-temperature adaptation of EVI technology achieves 'single-stage compression with dual-stage efficiency enhancement' through intermediate gas injection, maintaining a COP value of 4.25 (i.e., 4.25 times thermal energy per kWh) even at-35°C, while conventional heat pumps may have a COP below 2.51 at-10°C.
The low-temperature heat pump achieves enhanced heating capacity, while the jet injection enthalpy boost reduces exhaust temperature by 10-15°C and increases refrigerant flow by 20%-30%, resulting in 15%-20% higher heating output23. For instance, during-34°C tests in Mohe, the EVI heat pump maintained 55°C outlet water temperature without any shutdown failures. The EVI heat pump features rapid defrosting with AI-powered smart defrosting technology that completes the process in just 40 seconds, effectively preventing heating interruptions caused by frequent shutdowns in conventional heat pumps.
The EVI Heat Pump delivers comprehensive energy efficiency and cost-effectiveness optimization. Its DC inverter technology, combined with EVI, dynamically adjusts power output based on load requirements, achieving over 30% overall energy efficiency improvement. It offers significant long-term cost advantages. For instance, a floor heating system (equipped with EVI technology) has a total cost of approximately 70,000 yuan over 10 years, saving 42% compared to air-source heat pumps, and requires no regular antifreeze fluid replacement. The air-source heat pump system ensures stable operation and comfort through dynamic thermal balance. Featuring electronic expansion valves for precise throttling and an enhanced overcooler, it maintains a stable outlet water temperature above 45°C even at-35°C. Operating across a wide temperature range from-35°C to 45°C, the system prevents direct airflow in the water circulation system, ensuring indoor temperature fluctuations remain within ±1°C.
EVI Heat Pump's jet-enhanced enthalpy technology delivers a breakthrough in low-temperature heating, featuring a single-stage compression system with' dual-stage efficiency enhancement' The Enhanced Vapor Injection (EVI) technology achieves 'dual-stage compression with a single compressor' by adding a return gas port in the compressor's intermediate chamber. Its operation involves three stages: 1) Primary compression: Low-temperature, low-pressure gaseous refrigerant enters the compressor's low-pressure chamber for initial compression; 2) Intermediate gas injection: Low-temperature gaseous refrigerant is injected through the intermediate return port, mixing with the primary compression gas to reduce temperature and increase mass flow; 3) Secondary compression: The mixed gas enters the high-pressure chamber for further compression, forming high-temperature, high-pressure gaseous refrigerant.
The EVI Heat Pump demonstrates enhanced low-temperature adaptability. When operating below-15℃, frost formation on the evaporator surface may occur, reducing heat absorption capacity and triggering compressor shutdown due to excessive exhaust temperature. The EVI technology employs intermediate gas injection to lower exhaust temperature by 10-15℃, preventing high-temperature shutdown, while increasing condenser refrigerant flow by 20%-30% to boost heating capacity by 15%-20%. Experimental data shows that the heating capacity of the EVI system decays 40% slower than that of the conventional system at-35℃. EVI Heat Pump's DC-AC Inverter Technology: The secret to energy efficiency lies in its dynamic load matching. The inverter logic delivers precise temperature control through on-demand output The system employs a full DC variable frequency compressor, integrated with real-time monitoring through intelligent sensors. It operates across a wide temperature range (-35°C to 45°C) for outdoor environments, while tracking the temperature difference between indoor set points and actual conditions, as well as water flow pressure and temperature. The EVI Heat Pump achieves energy efficiency through two modes: During partial load operation, it reduces frequency to 30Hz to decrease refrigerant circulation, boosting COP above 4.5; in extreme cold conditions, it operates at 120Hz to maintain stable outlet water temperature of 45°C at-35°C. Energy efficiency comparison: 30% more energy-efficient than fixed-frequency models.
