Pressure reducing valve
A pressure reducing valve applied to products such as a water purifier, a bidet, a boiler, an instant water heater, and so on is provided. The pressure reducing valve has advantages of being capable of increasing productivity and reducing manufacturing cost of products by omitting a diaphragm, a metal poppet valve, and other parts which are essential in the conventional art. In addition, it is possible to prevent leakage of fluid from a peripheral connection part of the pressure reducing valve, and damage of the connection part due to high-pressure operation of the pressure reducing valve, thereby extending the lifespan of products.
1. A pressure reducing valve comprising:
a valve main body having a water inlet port, a water outlet port, and a pressure chamber disposed adjacent to the water outlet port;
a poppet valve having an inner flow path installed in the valve main body to connect the water inlet port and the water outlet port, and moving to adjust an introduction flow rate of fluid through the water inlet port;
a pressure/flow rate control member disposed at an outer periphery of the poppet valve, and expanding and contracting depending on movement of the poppet valve;
a solenoid engaged with the exterior of the water outlet port of the valve main body, and controlling opening/closing of the water outlet port; and
a movement control member installed at one end of the valve main body and controlling a movement range of the poppet valve depending on opening of the water inlet port.
2. The pressure reducing valve according to claim 1 , wherein the movement control member is a stopper disposed adjacent to the water outlet port in the pressure chamber.
3. The pressure reducing valve according to claim 1 , wherein the water inlet port has a diameter equal to or smaller than that of the water outlet port.
4. The pressure reducing valve according to claim 1 , wherein the water outlet port has a cross-sectional area within a predetermined range with respect to the inner flow path.
5. The pressure reducing valve according to claim 1 , wherein the poppet valve disposed in the pressure chamber has an engraved semi-circular shape at its one surface to rapidly react to transmitted pressure.
6. The pressure reducing valve according to claim 1 , wherein the pressure/flow rate control member is disposed in a spring chamber sealed by O-rings provided around both ends of the poppet valves.
7. The pressure reducing valve according to claim 6 , wherein the pressure/flow rate control member is a coil spring.
8. The pressure reducing valve according to claim 6 , wherein the spring chamber further comprises a vacuum release member for preventing decrease of mobility of the poppet valve due to a vacuum state.
9. The pressure reducing valve according to claim 8 , wherein the vacuum release member is a first communication hole formed in the valve main body positioned in the spring chamber.
10. The pressure reducing valve according to claim 8 , wherein the vacuum release member is a second communication hole formed in one end of the poppet valve for communication between the spring chamber and the pressure chamber.