Pressure balancing mixing valve and water valve including the same

Abstract

A water valve includes a valve body, a stationary sleeve, and a movable sleeve. The stationary sleeve is received in the valve body, and the movable sleeve is slidably disposed in the stationary sleeve. A partition plate is formed in the movable sleeve to partition the movable sleeve into a cold water cavity and a hot water cavity at two ends respectively. An external wall of the movable sleeve is formed with an annular groove positionally corresponding to the partition plate. When the partition plate is pushed under different pressure of cold water and hot water, the movable sleeve is moved to regulate flow ratio of cold water and hot water. Besides, water is received in the annular groove and the gap between the stationary sleeve and the movable sleeve for cushion and lubrication. Thus, the movable sleeve is easier to move for regulation.

What is claimed is: 
     
         1 . A pressure balancing mixing valve, adapted for being installed in a valve body, the valve body being defined with a receiving room having a first end and a second end, a cold water inlet and a hot water inlet arranged spacedly being located at the first end, a cold water outlet and a hot water outlet arranged spacedly being formed at the second end, the valve body having at least one first side wall and at least one second side wall at two sides of the receiving room, the pressure balancing mixing valve including:
 a stationary sleeve, being a hollow tube and being located in the receiving room, having a first cavity facing the first side wall and a second cavity facing the second side wall, the stationary sleeve being formed with a cold water hole and a hot water hole, the cold water hole corresponding to and communicating with the cold water inlet, the hot water hole corresponding to and communicating with the hot water inlet, the first cavity communicating with the hot water outlet, the second cavity communicating with the cold water outlet;   a movable sleeve, disposed in the stationary sleeve, the movable sleeve having a cold water end and a hot water end, a cold water cavity being formed at the cold water end, a hot water cavity being formed at the hot water end, a sliding direction being defined from the cold water end to the hot water end, the movable sleeve being slidable in the stationary sleeve along the sliding direction, a partition plate being formed in the movable sleeve to separate the cold water cavity and the hot water cavity apart, the movable sleeve being formed with a cold water slot and a hot water slot, the cold water slot communicating between the cold water hole and the cold water cavity, the hot water slot communicating between the hot water hole and the hot water cavity, overlapping area of the cold water slot and the cold water hole being reduced, and overlapping area of the hot water slot and the hot water hole being enlarged when the movable sleeve is moved toward the first side wall, an overlapping area of the cold water slot and the cold water hole being enlarged, and the overlapping area of the hot water slot and the hot water hole being reduced when the movable sleeve is moved toward the first side wall;   wherein an external wall of the movable sleeve is formed with at least one annular groove, the annular groove positionally corresponds to the partition plate, the annular groove surrounds the movable sleeve about an axis defined by the sliding direction, a gap is formed between the movable sleeve and the stationary sleeve, water is able to enter the annular groove via the gap to make the movable sleeve float.   
     
     
         2 . The pressure balancing mixing valve of  claim 1 , wherein a width of the annular groove is defined along the sliding direction, a depth of the annular groove is defined along a radial direction of the movable sleeve, the width and the depth of the annular groove are substantially equal. 
     
     
         3 . The pressure balancing mixing valve of  claim 1 , wherein the movable sleeve further includes two elastic elements, one of the elastic element is located in the hot water cavity and abuts against the partition plate and the first side wall with two opposite ends respectively, the other elastic element is located in the cold water cavity and abuts against the partition plate and the second side wall with two opposite ends respectively. 
     
     
         4 . A water valve including the pressure balancing mixing valve of  claim 1 , further including the valve body, the valve body being defined with the receiving room having the first end and the second end, the cold water inlet and the hot water inlet arranged spacedly being formed at the first end, the cold water outlet and the hot water outlet arranged spacedly being formed at the second end, the valve body having at least one said first side wall and at least one said second side wall at two sides of the receiving room. 
     
     
         5 . The water valve of  claim 4 , wherein a width of the annular groove is defined along the sliding direction, a depth of the annular groove is defined along a radial direction of the movable sleeve, the width and the depth of the annular groove are substantially equal. 
     
     
         6 . The water valve of  claim 4 , wherein the movable sleeve further includes two elastic elements, one of the elastic element is located in the hot water cavity and abuts against the partition plate and the first side wall with two opposite ends respectively, the other elastic element is located in the cold water cavity and abuts against the partition plate and the second side wall with two opposite ends respectively.