1 1 BMW x5 has several heating and cooling valves.

One. The warm air water valve is the warm air switch of the automobile heater. The working principle of the automobile heater is that the radiator in the heater is connected with the circulating water of the engine through the inlet and outlet pipes, and the water valve is a switch: the water valve is opened, the waterway is connected, the circulating water of the engine enters the radiator, and the fan blows heat into the cab. There is a stem in the center of the valve body. The part of the valve stem that extends out of the valve body is curved. The end of the bending part is sleeved with a connecting rod of a really hollow corrugated pipe assembly. The valve stem rotates with the change of vacuum degree of vacuum shoe.