Electronic expansion valve is used in Inverter air conditioning system to adjust flow of refrigerant automatically. 

Thus the air conditioner can always stay at the optimized working conditions with quick cooling, precise temperature control, low energy consumption, etc. 

This valve is reversible and can control the flow under either cooling or heating condition.

Electronic Expansion Valve (EXV) is mainly composed of valve body and coil. 

The controller in the air conditioning system can control the step motor of EXV to synchronize the turning of geartrain which convert the rotation of gears to a pull/push force and mover the valve pin axially which can change the flow area and flow of refrigerant accordingly.

Function: 

The controller sends pulse signal to the coil which controls the rotor synchronizing the turning of feed screw and nut, converting the rotation to movement of valve pin. 

Thus the flow area and flow of refrigerant will be changed accordingly. 

The stopper controls the stroke of valve pin within 0500P by slide rings.

EXV is composed of：

The EXV is driven by PM type step Motor(Claw pole permanent Motor) which consists of two relative separate parts: 

1)step motor coil.

2）multi pole rotor valve body. 

The coil is fixed onto the body through a clipper.

The main Characteristics: 

1)small size

2)light

3)The flow path is versatile to handle noise of refrigerant, high reliability and long life.