A one-way valve to stop the inverse flow of refrigerant in the
injection pipe can increase the injection mass flow rate and
enhance the injection performance. Because the application
of the one-way valve will increase the pressure drop of the
injection loop, a low pressure drop configuration of the oneway
valve is preferred.
At the same time, a one-way valve, which can control the
opening time, will make the control of the injection location
and period possible, which will largely enhance the adaptability
of injection system under variable conditions.