Carrier Corporation

Ruello Rubino

Olivier Josserand

Fengcheng Sun

Futao Zhao

Stevo Mijanovic

Lishan Wang

Eric Royet

Fabienne Peyaud

JeanPhilippe Goux

Marwan Chamoun

Olawale Adetona

Robert Bitmead

Mark Carnes

Andrea Spinaci

A heat pump system includes a refrigerant circuit, at least one compressor, an evaporator, and a controller programmed to defrost the evaporator in a defrost mode, wherein in the defrost mode the controller is programmed to monitor the evaporator to detect frost creation thereon, and reduce the speed of the at least one compressor and/or reduce the number of some, but not all operating compressors of the at least one compressor, if frost creation is detected on the evaporator. In some embodiments, the controller is programmed to defrost the evaporator in a second defrost mode. In the second defrost mode the controller is programmed to monitor the evaporator to detect frost creation thereon, turn off the at least one compressor when frost is detected on the evaporator, and operate a fan to force ambient air over the evaporator to defrost the evaporator.

Systems and methods for free and positive defrost

A refrigerant vapor compression system and a method of controlling the system are adapted for controlling the distribution of cooling capacity between two or more temperature controlled zones.

Control of multiple zone refrigerant vapor compression systems

Growing community of inventors

St. Didier de Formans, France

Ruello Rubino