The R32 all-DC inverter EVI heat pump is a new generation of air source heat pump that integrates three core technologies: all-DC inverter, EVI vapor injection enthalpy enhancement, and R32 environmentally friendly refrigerant. It combines advantages such as ultra-low temperature forced heating, ultra-high energy efficiency, green environmental protection, and intelligent comfort.
Dual-cycle enthalpy enhancement for enhanced low-temperature heating
The EVI compressor features an internal vapor injection enthalpy enhancement circuit. The refrigerant circulation is divided into a main cycle and a make-up gas cycle. After absorbing heat in the evaporator, a portion of the low-temperature, low-pressure refrigerant enters the main cycle for compression, while the other portion undergoes secondary throttling and cooling in the make-up gas circuit before being injected into the compressor's intermediate-pressure chamber. There, it mixes and pressurizes with the main cycle refrigerant, significantly increasing the refrigerant circulation volume and enthalpy value, thus enhancing low-temperature heating capacity. Simply put, it "replenishes energy" to the compressor, allowing the refrigerant to absorb more heat in extremely cold environments, improving heating efficiency by over 40%.
Intelligent defrosting, uninterrupted operation
Equipped with an intelligent defrosting system using EVI technology, it monitors the evaporator's frost condition in real time and employs a **three-dimensional judgment of temperature + humidity + time** to accurately identify the frost status. During defrosting, the system does not stop or cool down, defrosting quickly in 3-5 minutes. The indoor temperature fluctuation during defrosting is ≤1℃, avoiding the problem of traditional heat pumps that "stop immediately during defrosting and cause a sudden drop in indoor temperature," making winter heating in northern regions more comfortable.
Low-temperature performance without degradation
more stable heating: Ordinary heat pumps experience a sharp drop in heating efficiency below -10℃ and are basically unable to operate at -15℃; while the R32 EVI heat pump has a heating efficiency degradation rate of ≤10% at -20℃ and can still maintain more than 80% of its rated heating capacity at -30℃, which can stably drive heating terminals such as underfloor heating and fan coil units to meet the whole-house heating needs in extremely cold regions.
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