Mixed water control valve having a water pressure balance function to stabilize a water temperature

摘要

A mixed water control valve for a faucet includes a control unit, two mounting seats and a balance unit. The control unit includes a valve housing, a rotation plate and a control handle. The balance unit includes a fixed sleeve and a pressure regulating sleeve. The pressure regulating sleeve is movable in the fixed sleeve by a pressure differential between the two mounting seats to control the water flow rate of the cold and hot water of the two mounting seats and to regulate the water pressure automatically so as to provide a pressure balance and to stabilize the temperature of the mixed cold and hot water in the valve housing so that the mixed water flowing from the valve housing is kept at a constant temperature.

主权项

1. A mixed water control valve, comprising a control unit, two mounting seats and a balance unit,
the control unit including a valve housing; a rotation plate rotatably mounted in the valve housing and having a surface provided with two connecting holes; and a control handle rotatably mounted on the valve housing and connected with the rotation plate to drive and rotate the rotation plate relative to the valve housing; wherein the valve housing of the control unit has an open lower end provided with two fixing grooves partially extending around the open lower end and at least two separate stop flanges each extending over a predetermined portion of the fixing grooves; wherein an arc length of said fixing grooves is greater than a radial thickness of said open lower end, and said fixing grooves are located inside the valve housing; the two mounting seats being juxtaposed to and combined with each other; wherein each of the two mounting seats has a lower end provided with a water inlet hole, an upper end provided with a water outlet hole and a mediate portion provided with a valve chamber located between the water inlet hole and the water outlet hole; wherein the water outlet hole of each of the two mounting seats abuts the rotation plate of the control unit; the valve chambers of the two mounting seats are connected to each other; and the valve chamber of each of the two mounting seats has an open side provided with a connecting channel connected between the water inlet hole and the water outlet hole; wherein the open side defining the connecting channel of each of the two mounting seats is sealed by an end cap and a sealing ring that is located between the end cap and the valve chamber of each of the two mounting seats; and each of the two mounting seats has a periphery provided with a fixing piece inserted into the fixing groove of the valve housing and stopped by a respective one of the at least two stop flanges of the valve housing; the balance unit mounted in and surrounded by the two mounting seats; the balance unit including: a fixed sleeve secured in the valve chambers of the two mounting seats; a pressure regulating sleeve movably mounted in the fixed sleeve; and a plurality of O-rings mounted on the fixed sleeve and located between the fixed sleeve and the valve chamber of each of the two mounting seats; wherein the fixed sleeve of the balance unit is provided with two annular connecting grooves each connected between the water inlet hole and the connecting channel of a respective one of the two mounting seats; and the pressure regulating sleeve of the balance unit is provided with two connecting slots each movable to align or partially align with a respective one of the two connecting grooves of the fixed sleeve; wherein the pressure regulating sleeve of the balance unit has: an outer portion provided with a balance wall located between the two connecting slots to separate the two connecting slots; and two opposite ends each provided with a pressure stabilizing section, a periphery of which provided with a plurality of pressure stabilizing holes.