Blowing machine switch and inside and outside gas circulating operation composite block

The utility model which relates to an air blower switch and an internal and external gas cycle operation combination block comprises an upper shell body(1) and a lower shell body(3) that is connected with the upper shell through a light-guide plate (2). The upper end of the upper shell body (1) is connected with a knob (4); the lower shell body (3) is arranged on a bottom plate (5). The air blower switch and an internal and external gas cycle operation combination block is characterized in that a rotating axis wheel (7) is arranged in the lower shell body (3) and a printing circuit board (6) is arranged between the rotating axis wheel (7) and the bottom plate (5), and only a knob is used for two functions of controlling the speed of the air blower and the internal and external gas circulation air door., and the rotating direction decides the switch of the air door and the gear decides the rotating speed of the air blower, and the operation is very convenient.