Two-stage heat pump system with vapor-injected scroll compressor using R410A as a refrigerant - ScienceDirect
Evi Heat Pump, DC Inverter Heat Pump - Arctic Heat Pumps
Performance Comparison of the Vapor-Injection Cycle in Terms of Branching Points of the Injection Stream | Semantic Scholar
Performance improvement of vapor-injection heat pump system by employing PVT collector/evaporator for residential heating in cold climate region - ScienceDirect