To accurately determine the start and termination times of a defrosting operation to secure the reliability of a device, to improve the efficiency of the defrosting operation and the efficiency of a system, and to reduce cost by providing a low-cost optical frost formation detecting means.
The refrigerating air conditioner includes: a compressor 1; a condenser 2; an expansion valve 4 and an evaporator 5. The refrigerating air conditioner further includes: the frost formation detecting means 71 including a light emitting element formed of an LED, and a light receiving element formed of an LED; a frost density detecting means 72 including a light emitting element formed of an LED, and a light receiving element formed of an LED; a defrosting heating means 8; and a control means 13 determining the start and termination of the defrosting operation based on the output of the frost formation detecting means 71 and controlling the defrosting heating means 8 based on the output of the frost density detecting means 72. The control means 13 converts the output of the frost density detecting means 72 into voltage or light intensity, determines the frost density from the voltage or light intensity, and controls the capacity of the defrosting heating means 8 according to the frost density.
| JPS5795555 | COOLER |
| JPH0652142 | [Title of Invention] Air Conditioner |
MIYAMOTO MORIYA
SUGIMOTO TAKESHI
HORIUCHI KATSUNORI
YAMASHITA KOJI
KAMIYAMA TOMOTSUGU
MORIKAWA AKIRA
| JPH10253204A | 1998-09-25 | |||
| JP2005049022A | 2005-02-24 | |||
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| JPH10253204A | 1998-09-25 | |||
| JP2005049022A | 2005-02-24 |
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Takanashi Norio
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Murata Kensei
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