Self priming pump

The utility model discloses a gas self priming pump, including the pump body and motor, the lower half of pump body front end sets up the overhead tank, is provided with diversion channels between exhalant canal to the overhead tank, first one in pump body rear end is provided with two mounting holes, flow sensor and pressure switch are installed respectively to two mounting holes, formed the accommodation space between first one of pump body rear end and the motor casing, set up the circuit control system in the accommodation space, cover box covers circuit control system and flow sensor, pressure switch dew partial structure outside, and the top of top, left end, right -hand member, rear end and the pump body of cover box, motor casing's left end, motor casing's right -hand member, motor casing's rear end phase -match, be equipped with control panel assembly and display screen on the cover box. The utility model discloses a self priming pump, the required main control circuit module of whole self priming pu