How does the EVI heat pump unit achieve better performance in cold weather?

Answer: Kolant EVI (Enhanced Vapor Injection) heat pumps realize outstanding low-temperature performance via optimized refrigeration cycle and special structural upgrades.

 

First, it adopts an EVI enhanced vapor injection compressor with an economizer. Different from ordinary single-stage compression, it injects intermediate low-temperature refrigerant vapor into the compressor’s compression chamber. This achieves a quasi two-stage compression effect, effectively reducing the compression ratio and avoiding compressor overheating and power attenuation in frigid conditions.

 

Second, the vapor injection technology increases the overall enthalpy of the system. It supplements heating capacity, greatly weakening the performance drop that conventional heat pumps suffer in cold weather. The unit can maintain stable and strong heating output even at -25°C to -30°C.

 

In addition, it is equipped with low-temperature resistant core components, enhanced cold-resistant lubrication system and optimized heat exchange structure. These designs ensure smooth refrigerant circulation and reliable unit operation under extreme low ambient temperature.

 

With the above improvements, EVI heat pumps keep a high COP and stable heating efficiency in cold climates, perfectly solving the poor cold resistance of regular heat pumps.