| 摘要 |
PURPOSE:To improve amenity, by a method wherein correction is effected so that, when a bilevel mode is detected, a difference between a set temperature in a car room and a detecting temperature is increased, and control is made according to the correcting result. CONSTITUTION:With a control switch SW closed and an supply opening switching damper brought into a bilevel mode, an electromagnetic coil 112 of a relay 110 is excited, a normally closed switch 111 is opened, and a correction resistor 100 is released from short circuit. Thus, a detecting voltage generated at a detecting terminal (t) of a control circuit part Ea is increased to a value higher than a first partial pressure from a voltage dividing circuit 140. An actual temperature in a car room is falsely controlled to a value fairly lower than a desired temperature, a comparing circuit 150 outputs a comparing signal of a low level, and a comparing circuit 160 outputs a high level inversion signal. Thus, a drive circuit 170 is rotated forward, and a heating amount of a cooling air flow is increased. This constitution enables improvement of amenity. |
