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Application filedfiledCritical
Priority to JP7196176ApriorityCriticalpatent/JPS52154141A/ja
Publication of JPS52154141ApublicationCriticalpatent/JPS52154141A/ja
Publication of JPS5526393B2publicationCriticalpatent/JPS5526393B2/ja
F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
F25B2700/00—Sensing or detecting of parameters; Sensors therefor
F25B2700/11—Sensor to detect if defrost is necessary
F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor
