Evaporator units use a large amount of electrical energy. Their function is to deliver the cold air, produced by the compressor, into the refrigerated space. Coolant, from the compressor, circulates through a series of pipes in the evaporator. Giant fans push warm air across those pipes, cooling it down, and then blowing the cooled air into the refrigerated space. However, if the compressor is off and the fans remain on, the fans are simply blowing room temperature air around the refrigerated space, delivering no cooling and wasting electricity.
Freeaire®’s Cooler Controller™ saves a tremendous amount of energy by shutting the evaporator fans off. The Cooler Controller™ monitors the temperature and intelligently controls the evaporator fans so that they run when required to bring the temperature down and shuts them off at all other times. Generally, evaporator fans can be safely shut off around 50% of the time, a huge savings.
Some commercial refrigeration systems still use mechanical timeclocks to control electric heat or air defrost cycles, using electricity to defrost evaporator fins at set intervals for predetermined lengths of time. The Cooler Controller™ intelligently monitors the need for defrost and ends a defrost cycle when the job is done, using less energy.
Freeaire® also uses smaller, highly efficient circulation fans to ensure proper air circulation in each refrigerated space when the evaporator fans are not on.