Air mixture regulating process for vehicle air conditioning unit

摘要

The regulating process involves supplying fresh air or circulating air to the air conditioning unit. The specific enthalpy of the fresh air and of the circulating and/or mixed air is set. After comparison of these enthalpy, the supply of fresh and circulating air is so arranged that the mixed air has a specific enthalpy. The lowest specific enthalpy difference may be set on a cooling heat exchanger. To find the specific enthalpy, the temperature and relative humidity of the air are measured.