Water supply valve cartridge

Abstract

A water supply valve cartridge in which a flow rate control rotary disk has a reduced size, so that surface friction between the flow rate control rotary disk and a flow rate control fixed disk is minimized, thus improving manipulation efficiency of the water supply valve while opening or closing the valve, and which does not sensitively respond to flatness allowance due to the reduced size of the rotary disk, thus executing stable opening and closing operation. The flow rate control fixed disk ( 140 ) has water discharge holes ( 142 ). The flow rate control rotary disk ( 150 ) has a diameter to cover only the area around the water discharge holes ( 142 ), with a pair of flow rate control grooves ( 151 ) formed on the rotary disk ( 150 ) to open only the water discharge holes ( 142 ) during rotation.

1 - 14 . (canceled) 
     
     
         15 . A water supply valve cartridge, comprising: first and second fixed disks and first and second rotary disks that are rotated by operation of a temperature control unit and a flow rate control unit respectively, wherein the first rotary disk opens or closes hot and/or cold water inlet holes formed in the first fixed disk using a temperature control hole formed in the first rotary disk, wherein the second fixed disk includes a pair of water passage holes formed therein which is opened or closed by the second rotary disk using a pair of flow rate control holes formed in the second rotary disk, thus adjusting flow rate of cold water, hot water or mix of cold and hot water, wherein the pair of water passage holes directly communicate with a water discharge hole formed in the first rotary disk, and wherein a guide hole is formed in the first rotary disk so as to communicate the water discharge hole and the temperature control hole each other. 
     
     
         16 . The cartridge of  claim 15 , wherein the pair of water passage holes is symmetrically formed with respect to a center of the second fixed disk. 
     
     
         17 . The cartridge of  claim 15 , wherein the pair of flow rate control holes is symmetrically formed with respect to a center of the second rotary disk. 
     
     
         18 . The cartridge of  claim 15 , wherein the second rotary disk for adjusting the flow rate of cold water or hot water or mix of hot and cold water has a diameter to cover only an area corresponding to the water passage holes of the second fixed disk. 
     
     
         19 . The cartridge of  claim 18 , wherein the diameter of the second rotary disk is substantially half of a diameter of the second fixed disk. 
     
     
         20 . The cartridge of  claim 15 , wherein the first fixed disk which separately introduces cold water and hot water into the valve cartridge is partially inserted into a cartridge base block. 
     
     
         21 . The cartridge of  claim 15 , wherein the pair of flow rate control holes corresponds to the pair of water passage holes of the second fixed disk, and wherein the second rotary disk includes an annular seat having a longer axis and a shorter axis and formed on one end thereof to receive therein one end of the flow rate control unit. 
     
     
         22 . The cartridge of  claim 21 , wherein a water discharge passage is formed through a central axis of the flow rate control unit, with a boss formed on the flow rate control unit to be inserted in the annular seat of the second rotary disk. 
     
     
         23 . The cartridge of  claim 15 , wherein the flow rate control unit is coupled via fitting to one end of the second rotary disk in which the pair of flow rate control holes is formed. 
     
     
         24 . The cartridge of  claim 15 , wherein the flow rate control unit includes a stopper formed on an intermediate portion of an outer circumferential surface of the flow rate control unit to rotate within 90 degrees relative to a guide groove formed on an end of a stop bushing. 
     
     
         25 . The cartridge of  claim 15 , wherein the temperature control unit is concentrically fitted over the flow rate control unit, with a stop bushing being fitted into a cartridge housing and separating the temperature control unit from the flow rate control unit, and the first rotary disk being fitted into the temperature control unit. 
     
     
         26 . The cartridge of  claim 15 , further comprising a stop bushing, wherein the stop bushing comprises: a first locking protrusion formed on an outer circumferential surface of the stop bushing to engage with a stop protrusion formed on an inner circumferential surface of a cartridge housing, thus being prevented from rotating relative to the cartridge housing; a second locking protrusion formed on the end engaging a first locking recession of the second fixed disk; and a guide groove formed on an end of the stop bushing opposed to the locking protrusions and guiding a stopper of the flow rate control unit.