FROST SENSOR FOR REGRIGERATION APPARATUS AND A REFRIGERATION APPARATUS HAVING THE SAME

摘要

An apparatus for regulating frost buildup in a refrigeration apparatus. A photocell and lamp are mounted to function within an open housing having essentially non-reflective interior wall surfaces. The housing is located adjacent the refrigeration apparatus permitting cold air to circulate therethrough and allow frost buildup on such surfaces. As front forms thereon, illuminance intensity of the lamp light within the housing increases due to the light scattering characteristics of the frost causing the photocell to function to initiate the defrost cycle.