Introduction Regarding Evi Heat Pump

What is Evi Heat Pump?

EVI stands for “Enhanced Vapor Injection” and is a technology used on our cold climate heat pumps to achieve higher performance at lower temperatures. An EVI heat pump uses a 3rd smaller internal plate heat exchanger called an “Economizer” within the refrigeration cycle.

Advantage of Evi Air Water Heat Pump VS Originally Heat Pump

The EVI technology ensures the optimum performance of the unit when running at ambient temperature as low as -35℃, which helps to offer the users with comfortable house heating and stable hot water supply all year round.

Difference Between Evi Low Temperature Heat Pump and Ordinary Heat Pump

1. Different working ambient air temperature:

EVI low temperature heat pump is equipped with full inverter  EVI air-jet enthalpy compressor, which still has strong heating capacity in cold temperature at -25 ℃ or even -35 centigrade.  It can be operated in a wide range from -35 ° C to 43 ° C. Whether it is heating at low temperature or cooling at high temperature, it can meet your needs. Ordinary heat pumps can meet the refrigeration needs, but in winter heating is often stretched and cannot be effectively met.

2. Rapid defrosting technology

In addition to having a “cold heart”, evi heat pump  is also good  heating solution for its low ambient air temperature area such as in Nordic Europe. Evi Heat pump can have the rapid defrost technology than ordinary heat pump. Ordinary heat pump in around 0 ℃ ambient air temperature , the defrost cycle generally takes 5-10 minutes, and the evi heat pump  heat pump can complete the defrost in only 2-3 minutes. The ordinary unit can continuously heat for 45 minutes, and the evi heat pump can last for more than 60-80 minutes. Heating capacity of evi heat pump  is increased by more than 35% compared with ordinary units.

3. More Energy Saving

A comparison is made through the following performance curve: It can be seen from the figure that when the water temperature is set to 35 ° C, when the ambient temperature is lower than -5 ° C, the energy efficiency ratio is greatly reduced for ordinary heat pump , and when the ambient air temperature is lower than -10 ° C, the energy efficiency of ordinary heat pump is greatly reduced, only 1.1. The evi heat pump unit can still reach an energy efficiency ratio of about 2.0 at -25 ° C, and the energy efficiency ratio of 7 ° C at ambient temperature can even reach 4.0.