Air conditioning unit and three -phase ferroelectric phase preface detection device thereof

The utility model discloses an air conditioning unit and three -phase ferroelectric phase preface detection device thereof, wherein, three -phase ferroelectric phase preface detection device include:three -phase detection circuitry, three -phase detection circuitry include a detecting element, the 2nd detecting element and the 3rd detecting element, controllable switch circuit and control chip, control chip's control output links to each other with the control end of controllable switch circuit, wherein, when control chip exports a control signal with control controllable switch circuit conduction through the control output, detects the phase sequence of three -phase electricity through three -phase detection circuitry, when control chip breaks off with control controllable switch circuitthrough the 2nd control signal of control output, three -phase detection circuitry stop work. From this, can break off three -phase detection circuitry when need not carrying out phase sequence detection, reduce air condition