Patent ID: 6672086
Filing Date: 2004-01-06
Classification: F25B,F25D

Abstract:
A cooler for cooling articles and maintaining frost on the articles, the cooler comprising:an insulated cabinet defining a product zone for holding the articles to be cooled; a cooling coil constructed and arranged for receiving coolant therethrough to remove heat from the product zone in the cabinet; a fan for circulating air over the cooling coil and through the product zone in the cabinet; a water vapor source in fluid communication with the product zone for delivering water vapor to the product zone for condensing on the articles; a controller to control flow of coolant through the cooling coil, operation of the fan, and operation of the water vapor source to deliver water vapor into the product zone for condensing on the articles as frost, the controller being configured to automatically conduct a defrost of the cooling coil, in which the cooling coil temperature increases to melt any frost thereon, and to restart cooling of the cooling coil by flow of coolant therethrough after defrost, the controller delaying operation of the fan after restarting the cooling of the cooling coil following defrost until the cooling coil has reached a temperature so that circulation of air from the cooling coil though the product zone will not melt frost on the articles.