Patent ID: 10473381

Abstract:
A method and system for defrosting a refrigerant coil using at least one of resistive and electromagnetic heating. The method and system involves providing a refrigerant tube formed from an electrically conductive material, an upstream refrigerant conduit for supplying a refrigerant to the refrigerant tube, and a downstream refrigerant conduit for receiving the refrigerant from the refrigerant tube; determining at least one of a desired resistive heating and electromagnetic heating for defrosting the refrigerant tube; providing an electrical coupler, connectable between a standard line voltage from an external power source, the standard line voltage having an externally determined voltage value and an externally determined standard line frequency and the refrigerant tube; determining at least one parameter of the refrigerant tube; based on the at least one parameter of the refrigerant tube, determining a target frequency of a high-frequency alternating current to apply to the refrigerant tube to provide the at least one of the desired resistive heating and electromagnetic heating when the high-frequency alternating current is applied to the refrigerant tube, the target frequency being higher than the externally determined standard line frequency.