JPS6454165A - Controller for air blast amount of air conditioner - Google Patents

Abstract

PURPOSE:To carry out the control of a constant air amount by installing a sensor detecting an air blast amount, a damper-motor, the motor of an air blower, and a changeover means changing connection from low speed one to high speed one. CONSTITUTION:A control part 10 is composed of a changeover means (sequence circuit 8) increasing the capacity of an air blower 5 by changing the connection of an air blower-motor 4 from low speed connection to high speed one, and the control means 12 of a microcomputer, etc., controlling the opening and closing of a damper 6, the changeover of the circuit 8, and the operation of a damper-motor 9, etc., in order to maintain the air blast amount at a set air amount. On the basis of the air blast amount detected by a sensor 7 the motor 9 is operated with means 12 and the control of the air blast amount is carried out by a damper 6, and also according to the full opening of the damper 6 the circuit 8 is operated to increase the capacity of the blower 5 in changing the connection of the motor from low speed connection to high speed one. Further, the damper 6 is controlled in opening and closing and the air blast amount can be kept at a set air amount.