Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1997-12-05
1999-08-03
Tanner, Harry B.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62155, 62156, F25D 2106
Patent
active
059310090
ABSTRACT:
A defrosting apparatus of an air conditioner and method thereof are provided to efficiently carry out a defrosting operation during the heating operation by comparing temperature of an outdoor heat-exchanger, an outdoor temperature and an operation time of a compressor to correctly discriminate whether the frost has accumulated at an outdoor unit, to thereby effectively carry out defrosting operation, the air conditioner having an outdoor heat-exchanger to heat-exchange the outdoor air and a compressor to compress a coolant for being heat-exchanged at the heat-exchanger, the apparatus comprising: a pipe temperature detecting unit to detect the outdoor temperature; an outdoor temperature detecting unit to detect the outdoor temperature during the heating operation via the operation of the compressor; a controlling unit to control the defrosting operation by discriminating the accumulation of the frost on the outdoor unit with consideration of the temperature of the outdoor heat-exchanger, the outdoor temperature detected by the outdoor temperature detecting unit and the time when the compressor is operated; a four way valve to change the flow of the coolant for carrying out defrosting operation according to the control of the controlling unit; and a compressor driving unit to drive the compressor to carry out the defrosting operation according to the control of the controlling unit.
REFERENCES:
patent: 5257506 (1993-11-01), DeWolf et al.
patent: 5440890 (1995-08-01), Bahel et al.
Samsung Electronics Co,. Ltd.
Tanner Harry B.
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