Control method, device and automobile control unit for automobile air conditioning system and automobile

The invention provides a control method, device and automobile control unit for an automobile air conditioning system and an automobile. The control method comprises the following steps of detecting whether an automobile power-on signal is received; and when the automobile power-on signal is received, controlling the air conditioning system to be in an external cycle work mode. The control method, device and automobile control unit for the automobile air conditioning system and the automobile, provided by the embodiment of the invention can solve the problems that because in the prior art, a large exhaust valve is arranged for exhaust so as to improve the feel of people when closing doors, the manufacturing cost of the automobile is high, and the using properties of air conditioners are influenced, the door-closing speed and the door-closing on-ear feeling are reduced, the using comfort degree of users is increased, besides, the large exhaust valve is not needed, and the manufacturing cost of the automobile c