De-icing for low temperature refrigeration devices

Year	Description
2000	Invention patented by Allan D. Kelly and Paul Steinhoff on September 27th, 2000. Abstract: A de-icing system operable to facilitate the removal of ice from the door (18) and closure surface (22) of a low temperature refrigeration or ultra-low freezer device (10) and to thereby ensure proper operation of the device (10) and protect its contents. The de-icing system employs manually activated heaters (32) and a timing circuit (38) to thaw the ice. Because the de-icing system focuses heat only on specific, ice-sensitive areas, the temperature of the freezer's interior compartment (14) remains constant so that the contents need not be removed during the de-icing process. In use, an operator activates the de-icing system a few minutes prior to opening the freezer door (18). When the door (18) is opened, the melted or loosened ice can be removed with a soft cloth. If the operator forgets that the heaters have been activated, the timing circuit (38) automatically terminates the de-icing process and stops the heaters (32) before the freezer's interior storage temperature has been affected. Optional thermal fuses (42) provides a safety cut-off should the timing circuit (38) fail or the heaters (32) exceed a pre-established temperature.
Source: selected by the editor from original sources.

Invention: De-icing for low temperature refrigeration devices