CONTROL OF HEATER, ESPECIALLY DEFROSTING HEATER FOR COOLING PLANT

PURPOSE: To limit the feed of the heat to minimize it required for a defrosting operation, by measuring the heater and room temps. at specified time intervals, and turning off the heater if the room temp. rises by comparing the measured values with preceding values. CONSTITUTION: A defrosting heater...

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Bibliographische Detailangaben
1. Verfasser:	FURIIDOHERUMU MAIAA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COLD ROOMS COMBINED HEATING AND REFRIGERATION SYSTEMS CONTROLLING COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS HEAT PUMP SYSTEMS HEATING ICE-BOXES LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING PHYSICS REFRIGERATION OR COOLING REFRIGERATORS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE: To limit the feed of the heat to minimize it required for a defrosting operation, by measuring the heater and room temps. at specified time intervals, and turning off the heater if the room temp. rises by comparing the measured values with preceding values. CONSTITUTION: A defrosting heater is kept turned on until rising near 0 deg.C from an on-time t1 . At time t2 , e.g. a temp. value of 0 deg.C measured by a temp. sensor is stored in an electronic device, and the heater is turned off. After 30 sec, the temp. of the temp. sensor in an evaporator is collated to compare temp. t3 with temp. t2 . If e.g. temp. t3 rise of 0.1 deg.C is measured, the heater is kept turned off. Thus, a remaining heat of the defrosting heater is utilized and it continues until e.g. a heater turn off temp. of 10 deg.C is reached.