JPS6454166A - Controller for air blast amount of air conditioner - Google Patents

Abstract

PURPOSE:To maintain an air blast amount at a set air amount by installing a sensor detecting the air blast amount and a control means controlling increasingly and decreasingly the revolving speed of an air blower in regulating a damper in the open direction in order to maintain the air blast amount at the set air amount. CONSTITUTION:In a condition where an air blast amount detected by a sensor 7 is equal to a set air one, a damper 6 is controlled in the open direction and in response to the increase in the air blast amount by the opened amount of a damper 6, control lowering the operation frequency of a blowermotor 4 is carried out; thereby, the air blast amount is maintained at the set one by the control in the open direction with the suppression of power loss. When the damper is fully opened as long as the air blast amount is maintained at the set one, the operation of an air blower is maintained in the operation frequency at that time. Then, when the air blast amount is less than the set one in the operation condition with this fixed frequency, the operation frequency of the blower 5 is increased and after the air blast amount is equal to the set one by the said operation, the operation of the blower 5 is carried out again at the fixed frequency with the condition of full opening of the damper 6.