The device (10) has an air dryer (12) provided with a ladder-shaped air dryer housing (14). A multiloop protective valve (16) is provided with a valve shell (18). The air dryer housing and a valve housing are connected with each other. The air dryer housing comprises a protruding part that partially overlaps the valve housing. A drying filter core is installed on an air dryer shell. The air dryer housing is connected with a side of a containing part, which contains the valve shell.
