Anti-siphon structure for tankless rpessure flushing toilet

Abstract

An anti-siphon structure for a tankless pressure flushing toilet, that comprises: a main body, on which is disposed a water passage channel, the main body is connected to a water output end of a water supply pipe; a movable valve core set, disposed in the main body, to open or close water flowing through the water passage channel; a first check valve, connected to a water output end of the main body, a water output end of the first check valve is connected to a pressure water tank of a toilet seat; and a vacuum breaker, disposed at a side of a front end of the movable valve core set, and is connected to the water passage channel. A second check valve is disposed at the water input end of the main body.

What is claimed is: 
     
         1 . An anti-siphon structure for a tankless pressure flushing toilet, comprising:
 a main body, on which is disposed a water passage channel, the main body is connected to a water output end of a water supply pipe;   a movable valve core set, disposed in the main body, to open or close water flowing through the water passage channel;   a first check valve, connected to a water output end of the main body, a water output end of the first check valve is connected to a pressure water tank of a toilet; and   a vacuum breaker, disposed at a side of a front end of the movable valve core set, and is connected to the water passage channel.   
     
     
         2 . The anti-siphon structure for a tankless pressure flushing toilet as claimed in  claim 1 , wherein the movable valve core set includes a mandrel disposed in the main body, one end of the mandrel is disposed a connection ring, a spring is disposed between one end of the connection ring and the main body, and a tight seal ring is disposed on the other end of the connection ring, to open and close water flowing through the water passage channel. 
     
     
         3 . The anti-siphon structure for a tankless pressure flushing toilet as claimed in  claim 2 , wherein an end cover is disposed at one end of the main body located at a water input end of a water input channel, the spring is disposed between the end cover and the connection ring, the tight seal ring is disposed around an outer rim of the connection ring, and a water stop pad is lock tightly to the connection ring through a bolt. 
     
     
         4 . The anti-siphon structure for a tankless pressure flushing toilet as claimed in  claim 3 , wherein a water output end of the first check valve is connected to a water passage tube, a water output end of the water passage tube is connected to a pressure water tank, and an open ring and a nut is disposed between a water passage section and the pressure water tank. 
     
     
         5 . The anti-siphon structure for a tankless pressure flushing toilet as claimed in  claim 4 , further comprising: a second check valve, disposed at a water input end of the main body to prevent water from flowing backward.