JPS57182516A - Cooling cycle controller for motor car - Google Patents

Abstract

PURPOSE:To enable to manage with a little driving force for the next compressor by making a capacity of the compressor small according as an engine or a power source switch of a freezing cycle is turned off, in a cooling cycle controller. CONSTITUTION:Operation of an air conditioner is stopped when an ignition switch 25 or a freezing cycle side power source switch 26 is opened. When the switch 26 is opened a transistor 164b is turned off, transistors 166, 167 and 171 are turned on, transistors 168-170 are turned off, a servomotor 17 is rotated in the reverse direction as it is electrified through transistor 171 and 167, a turning angle of a variable cylinder is reduced and a capacity is made smallest. Then, when the switch 25 is opened while the switch 26 is kept closed, an electric power source 277 of a time limit circuit 27 is electrified through a relay contact point 28a, a turning on condition of a transistor 276 and electrification to a relay 28 are kept continued. Thus, the transistors 166, 167 and 171 are turned on and the servomotor 17 is made to rotate in the reverse direction.