Patent ID: 8424324

Claim:
A pulse electrothermal defrost evaporator system comprising: a plurality of refrigerant tubes ( 108 , 202 , 803 ) formed from an electrically conductive metal; a first manifold ( 104 , 204 ) for distributing refrigerant into the plurality of refrigerant tubes ( 108 , 202 , 803 ), the plurality of refrigerant tubes connected in parallel for refrigerant flow; a second manifold ( 106 , 206 ) for receiving refrigerant from the plurality of refrigerant tubes; and a controller ( 150 ) for detecting ice accumulation on the refrigerant tubes and for electrically connecting the refrigerant tubes to a source of electrical power to deice the refrigerant tubes when ice is detected on the refrigerant tubes; wherein a plurality of the refrigerant tubes are electrically coupled together in series.