Take automatic valve that drains of heating device

The utility model relates to a take automatic valve that drains of heating device, including valve body, end cover, diaphragm and heating device, the diaphragm is located the water storage intracavity and divide into water storage chamber and time water storage chamber with the water storage chamber, the upper surface and the bellied upward valve port A of water storage chamber switching of control that forms between the terminal surface down of annular of diaphragm, form the valve port B of control drainage hole switching between the lower surface of diaphragm and the upper hole port surface of wash port, compressed air and the pressure control valve mouth A of aqueous water and valve port B's the switching of coming through air tank among the vapour vehicle driving process, and survey the switching that outside temperature controlled heating device through temperature sensor, effectively prevent under the lower condition of cold area temperature, the aqueous water of water storage intracavity build -ups ice