Means and techniques useful in detecting frost
AssigneeGeoscience Ltd.
InventorsCullen M. Sabin, Heinz F. Poppendiek
Life of this patent
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Abstract
In a heat pump system wherein an evaporator is located outdoors with a stream of air being blown through spaced fins of the evaporator and frost is formed on the fins thereby impairing the efficiency of the heat exchanger, heat flow sensing means is positioned on one or more of such fins and in heat conducting relation to such fins for the purpose of controlling defrost means such that when frost is formed the heat flow sensing means causes defrosting.
Claims6
In a heat exchange system wherein moisture in ambient cooling air produces frost on a heat exchanger through which refrigerent flows and impairs the transfer of heat from said exchanger, heat flow sensing means including a pair of temperature sensing means, each of said temperature sensing means being mounted externally of said heat exchanger in spatial relationship to each other and in heat conductive relationship to said exchanger to sensing the flow of heat from said exchanger and the impairment of said transfer and producing an output in accordance with said impairment, and means coupled to said sensing means and using said output for defrosting said exchanger.
Dependencies are inferred from the claim text.