Mixing valve

Abstract

In the present invention a mixing valve is provided, comprising a valve seat provided with first and second fluid conduits and a mixed fluid conduit and including a first plug-fit portion and a first mounting portion, and a valve core defining first and second stop surfaces. The valve core comprises a valve housing provided with a second plug-fit portion configured to be mated with the first plug-fit portion, a valve shaft disposed within the valve housing and provided with a valve plate comprising a first regulating aperture and a second regulating aperture, a stop member mounted on the valve shaft, the valve core defining an initial position in which the stop member engages with the first stop surface and a final position in which the stop member engages with the second stop surface, and a valve module. The mixing valve further comprises a pressing cover provided with a second mounting portion to be detachably mounted to the first mounting portion, wherein the valve core is tightly pressed between the pressing cover and the valve seat. In the present invention a valve core and a mixing valve assembly comprising such valve core are also provided.

What is claimed is: 
     
         1 . A mixing valve for mixing first and second fluids, comprising:
 a valve seat provided with a first fluid conduit, a second fluid conduit and at least one mixed fluid conduit, and comprising a first plug-fit portion and a first mounting portion;   a valve core defining a first stop surface and a second stop surface, and comprising:
 a valve housing provided at a bottom thereof with a second plug-fit portion configured to be mated with the first plug-fit portion and provided at a top thereof with a housing hole; 
 a valve shaft rotatably received in the valve housing, with a top portion of the valve shaft extending out from the housing hole, and a bottom portion of the valve shaft provided with a valve plate including a first regulating aperture and a second regulating aperture, wherein the first regulating aperture is configured to selectively communicate with the first fluid conduit and the second regulating aperture is configured to selectively communicate with the second fluid conduit; 
 a stop member mounted on the portion of the valve shaft extending out from the housing hole, wherein the valve core defines an initial position in which the stop member engages with the first stop surface and a final position in which the stop member engages with the second stop surface; and 
 a valve module arranged between the regulating apertures on one hand and the first and second fluid conduits on the other hand; and 
   a pressing cover provided at a bottom thereof with a second mounting portion configured to be detachably mounted to the first mounting portion and provided at a top thereof with a cover hole through which the valve core passes, wherein the valve core is tightly pressed between the pressing cover and the valve seat.   
     
     
         2 . The mixing valve according to the  claim 1 , wherein the valve housing has an adjusting seat integral with the valve housing and forming the first stop surface. 
     
     
         3 . The mixing valve according to the  claim 2 , wherein the valve core further comprises an adjusting ring fitted onto the adjusting seat and forming the second stop surface. 
     
     
         4 . The mixing valve according to the  claim 1 , wherein the valve plate comprises a first layer and a second layer spaced from each other by a distance, wherein formed between the first and second layers is a mixing chamber in fluid communication with the mixed fluid conduit. 
     
     
         5 . The mixing valve according to the  claim 1 , wherein the valve module is provided at a top thereof with sealing gaskets sealingly connected to the first and second regulating apertures, respectively, wherein the sealing gaskets are made of ceramic or rubber. 
     
     
         6 . The mixing valve according to the  claim 1 , wherein the valve module comprises a first check valve sealingly connected to the first fluid conduit and a second check valve sealingly connected to the second fluid conduit, and further comprises a pressure balancing valve subassembly for balancing the pressures of the first and second fluids within the valve module. 
     
     
         7 . The mixing valve according to the  claim 3 , wherein an inner spline is provided at inside of the adjusting ring and an outer spline is provided at outside of the adjusting seat, and the adjusting ring is configured to be fitted onto the adjusting seat in variable angles by means of mating of the inner spline with the outer spline so as to adjust the final position. 
     
     
         8 . A valve core for mixing valve, comprising:
 a first stop surface and a second stop surface;   a valve housing having a housing hole at a top thereof;   a valve shaft rotatably received in the valve housing, with a top portion of the valve shaft extending out from the housing hole, and a bottom portion of the valve shaft provided with a valve plate including a first regulating aperture and second regulating aperture; and   a stop member, wherein the valve core defines an initial position in which the stop member engages with the first stop surface and a final position in which the stop member engages with the second stop surface, wherein the stop member is adjustably mounted to the portion of the valve shaft extending out from the housing hole so as to selectively protrude at either the first side or the second side of the valve shaft.   
     
     
         9 . The valve core according to the  claim 8 , wherein arranged within the valve shaft is a through hole transversely extending through the valve shaft, and the stop member is configured as a pin adapted to be mounted in the through hole. 
     
     
         10 . The valve core according to the  claim 9 , wherein the pin has an outer threaded portion and the through hole has an inner threaded portion configured to be mated with the outer threaded portion. 
     
     
         11 . The valve core according to  claim 8 , wherein the valve housing has an adjusting seat integral with the valve housing and forming the first stop surface. 
     
     
         12 . The valve core according to the  claim 11 , wherein the valve core further comprises an adjusting ring fitted onto the adjusting seat and forming the second stop surface. 
     
     
         13 . A mixing valve assembly comprising the valve core according to  claim 8 , and further comprising:
 a valve seat provided with a first fluid conduit, a second fluid conduit and at least one mixed fluid conduit;   a pressing cover, the valve core being tightly pressed between the pressing cover and the valve seat; and   a handle configured to be connected to the valve shaft;   wherein the mixing valve assembly has a first installing configuration in which the stop member protrudes at the first side of the valve shaft and the handle is connected in a first orientation relative to the valve shaft, and a second installing configuration in which the stop member protrudes at the second side of the valve shaft and the handle is connected in a second orientation relative to the valve shaft.   
     
     
         14 . The mixing valve assembly according to the  claim 13 , wherein the top portion of the valve shaft has two truncated planes parallel to each other, and the handle comprises a receiving bore for receiving the top portion of the valve shaft, wherein the receiving bore includes on an inner wall thereof two corresponding truncated planes parallel to each other, such that the first orientation is offset from the second orientation by an angle of 180°. 
     
     
         15 . The valve core according to  claim 9 , wherein the valve housing has an adjusting seat integral with the valve housing and forming the first stop surface. 
     
     
         16 . The valve core according to  claim 10 , wherein the valve housing has an adjusting seat integral with the valve housing and forming the first stop surface. 
     
     
         17 . A mixing valve assembly comprising the valve core according to  claim 9 , and further comprising:
 a valve seat provided with a first fluid conduit, a second fluid conduit and at least one mixed fluid conduit;   a pressing cover, the valve core being tightly pressed between the pressing cover and the valve seat; and   a handle configured to be connected to the valve shaft;   wherein the mixing valve assembly has a first installing configuration in which the stop member protrudes at the first side of the valve shaft and the handle is connected in a first orientation relative to the valve shaft, and a second installing configuration in which the stop member protrudes at the second side of the valve shaft and the handle is connected in a second orientation relative to the valve shaft.   
     
     
         18 . A mixing valve assembly comprising the valve core according to  claim 10 , and further comprising:
 a valve seat provided with a first fluid conduit, a second fluid conduit and at least one mixed fluid conduit;   a pressing cover, the valve core being tightly pressed between the pressing cover and the valve seat; and   a handle configured to be connected to the valve shaft;   wherein the mixing valve assembly has a first installing configuration in which the stop member protrudes at the first side of the valve shaft and the handle is connected in a first orientation relative to the valve shaft, and a second installing configuration in which the stop member protrudes at the second side of the valve shaft and the handle is connected in a second orientation relative to the valve shaft.   
     
     
         19 . A mixing valve assembly comprising the valve core according to  claim 11 , and further comprising:
 a valve seat provided with a first fluid conduit, a second fluid conduit and at least one mixed fluid conduit;   a pressing cover, the valve core being tightly pressed between the pressing cover and the valve seat; and   a handle configured to be connected to the valve shaft;   wherein the mixing valve assembly has a first installing configuration in which the stop member protrudes at the first side of the valve shaft and the handle is connected in a first orientation relative to the valve shaft, and a second installing configuration in which the stop member protrudes at the second side of the valve shaft and the handle is connected in a second orientation relative to the valve shaft.   
     
     
         20 . A mixing valve assembly comprising the valve core according to  claim 12 , and further comprising:
 a valve seat provided with a first fluid conduit, a second fluid conduit and at least one mixed fluid conduit;   a pressing cover, the valve core being tightly pressed between the pressing cover and the valve seat; and   a handle configured to be connected to the valve shaft;   wherein the mixing valve assembly has a first installing configuration in which the stop member protrudes at the first side of the valve shaft and the handle is connected in a first orientation relative to the valve shaft, and a second installing configuration in which the stop member protrudes at the second side of the valve shaft and the handle is connected in a second orientation relative to the valve shaft.