In order to overcome problems happened in air-to-water chillers under low ambient temperauture, such as the rapid decrease of cooling capacity, a new type air-to-water chiller was presented, in which an additional capillary tube parallel to expansion valve as well as variable condenser fans is used.

Then the heat transfer model for V-type air-cooled condenser is established after modeling methods having been verified correct.

Study on suppressing electromagnetic disturbance of automobile condenser fan;

The technological performance, parameters and structure of air-cooling transformer are introduced with the key technology for improving the reliability and reducing dissipation.