Fixed Throttle Valve (Orifice)
- Inlet on the high pressure side
- Filter insert
- Internal diameter of the throttle valve
- O-ring
- Outlet on the low pressure side.
The task of the throttle valve is to:
- regulate the quality of refrigerant that flows through en route to the evaporator
- separate the high pressure side from the low pressure side.
Upstream of the throttle valve is the refrigerant in liquid form at high pressure.
The throttle valve ensures that the correct amount of refrigerant is released to the evaporator. The quantity of refrigerant must be sufficient that the final remains evaporate precisely before the evaporator outlet.
Too little refrigerant causes the refrigerant to evaporate quickly and the vapor to overheat. This results in reduced cooling capacity.
Too much refrigerant means that some of the refrigerant does not evaporate, but is heated up. This results in reduced cooling capacity. In addition there is the risk that some of the refrigerant in liquid form reaches the compressor. This may damage the compressor because liquid cannot be compressed.