PURPOSE: To shorten the running time and consequent running power loss of the compressor by a method wherein the outlet temperature of an evaporater and the blowing- off temperature of a blowoff port are respectively detected and a compressor is controlled by starting and stopping when the difference between the blowing-off temperature and the outlet temperature reaches the set value.
CONSTITUTION: A first and a second temperature sensors 19 and 20 for detecting air temperatures are provided between the evaporator 13 and a damper 16 and within the blowoff port 18 of a duct 14 in the vehicular cooling equipment. The outputs of the respective sensors 19 and 20 are inputted to a controller 21. The controller 21 compares the temperature Te detected by the sensor 19 with a second set temperature T2 (for example 3°C). When the temperature Te attains the temperature T2, the controller 21 outputs an OFF signal to an electromagnetic clutch interposed between the compressor 4 and a driven pulley 6. Furthermore, when the temperature Te attains a first set temperature (for example 6°C), the controller 21 outputs an ON signal to the electromagnetic clutch. In addition, when the difference between the temperature Tf is detected by the sensor 20 and the temperature Te is also detected as equal to a set temperature difference (for example 6°C), the controller 21 outputs an OFF signal to the electromagnetic clutch.
HASEGAWA ATSUSHI
KOBAYASHI HISAO
