Refrigeration – Automatic control – Of external fluid or means
Patent
1998-06-08
2000-05-02
Bennett, Henry
Refrigeration
Automatic control
Of external fluid or means
62156, 62181, 62DIG17, F25B 3904
Patent
active
060558199
ABSTRACT:
A method for preventing an evaporator of an air conditioner from freezing comprises the steps of (1) detecting an outdoor temperature, (2) determining whether or not the outdoor temperature is 20.degree. C., (3) determining whether or not the outdoor temperature is in a first temperature range, (4) determining whether or not the outdoor temperature is in a second temperature range, (5) varying an R.P.M. of the motor assembly based on the outdoor temperature detected in steps (3) and (4), (6) detecting a surface temperature of a condenser and determining whether or not the surface temperature of the condenser is in a third temperature range, (7) repeating steps (1) through (6) if the surface temperature of the condenser is higher than the third temperature range, and (8) rotating the motor assembly at a low speed if the surface temperature of the condensor is lower than the third temperature range. The apparatus is the advantageous in that the apparatus constantly maintains the internal pressure of the evaporator by varing the R.P.M. of the motor assembly according to the outdoor temperature and surface temperature of the condenser so that the internal pressure of the evaporator is constantly maintained, thereby preventing the evaporator of the air-conditioning system from freezing.
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Japanese Abstract, vol. 17, No. 206, (M-1400), Apr. 1993.
Bennett Henry
Daewoo Electrics Co., Ltd.
Norman Marc
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