Water pre-storable toilet

Abstract

A water pre-storable toilet includes a drain valve located between an injection duct and a water tank, and a float connected to the drain valve is further provided in the water tank. The float is configured to apply an upward pulling force to the drain valve at least when a water level of the water tank reaches a maximum. The float is also configured in such a way that when the float applies the upward pulling force to the drain valve, a buoyancy of the float may not overcome a water pressure caused by the water in the water tank to the drain valve, a weight of the drain valve itself, and a negative pressure formed when the pre-stored water in the injection duct reaches the highest water level regardless of water level of a water in the water tank and thus can't open the drain valve.

What is claimed is: 
     
         1 . A water pre-storable toilet with a drain valve between an injection duct and a water tank, wherein a float connected to the drain valve is further provided in the water tank of the water pre-storable toilet, the float is configured to apply an upward pulling force to the drain valve at least when a water level of the water tank reaches a highest water level, the float is also configured in such a way that when the float applies the upward pulling force to the drain valve, a buoyancy of the float may not overcome a water pressure caused by the water in the water tank to the drain valve, a weight of the drain valve itself, and a negative pressure formed when a pre-stored water in the injection duct reaches the highest water level regardless of a water level of the water in the water tank, thus can't open the drain valve; a specific formula of the negative pressure formed when the pre-stored water in the injection duct reaches the highest water level is as follows:
   P max =ρ water gh max S
   wherein h max  is a difference between the highest water level of the pre-storage water and a water level of a trap water seal, and S is a pressure bearing area of the drain valve.   
     
     
         2 . The water pre-storable toilet as claimed in  claim 1 , wherein the float is further configured in such a way that when the float applies the upward pulling force to the drain valve, the buoyancy of the float may not overcome the water pressure caused by the water in the water tank to the drain valve, the weight of the drain valve itself, and the negative pressure formed when a toilet bowl is filled with water and the pre-stored water in the injection duct reaches the highest water level regardless of a water level of the water in the water tank, thus can't open the drain valve; and a specific formula of the negative pressure formed when the toilet bowl is filled with water and the pre-stored water in the injection duct reaches the highest water level is as follows:
     P   min =ρ water   gh   min   S ( h   min >0)
   wherein h min  is a difference between the highest water level of the pre-stored water and a position of an upper surface of an outer edge of the toilet bowl.   
     
     
         3 . The water pre-storable toilet as claimed in  claim 1  wherein the float is further configured in such a way that when the float applies the upward pulling force on the drain valve, there is at least a first water level in the water tank and under the first water level, the buoyancy of the float overcomes the water pressure caused by the water in the water tank to the drain valve and the weight of the drain valve itself and thus opens the drain valve, and the first water level is lower than or equal to the highest water level of the water tank. 
     
     
         4 . The water pre-storable toilet as claimed in  claim 2 , wherein the float is further configured in such a way that when the float applies the upward pulling force on the drain valve, there is at least a first water level in the water tank and under the first water level, the buoyancy of the float overcomes the water pressure caused by the water in the water tank to the drain valve and the weight of the drain valve itself and thus opens the drain valve, and the first water level is lower than or equal to the highest water level of the water tank. 
     
     
         5 . The water pre-storable toilet as claimed in  claim 1 , wherein the float is connected to the drain valve through a drawstring, and when the drawstring is straightened, the float applies the upward pulling force to the drain valve, and the drawstring is also configured to be straightened at least when the water level of the water tank reaches the highest water level. 
     
     
         6 . The water pre-storable toilet as claimed in  claim 1 , wherein the water pre-storable toilet is further provided with an intake pipe in the water tank, one end of the intake pipe is connected to the injection duct, the other end is extending out of the highest water level of the water tank, and an intake valve is provided on the intake pipe for realizing or cutting off the connection between the intake pipe and atmosphere. 
     
     
         7 . The water pre-storable toilet as claimed in  claim 6 , wherein the water pre-storable toilet is further provided with a housing in the water tank; the housing is sealingly connected to the injection duct, and a water inlet is provided on a wall of the housing; the drain valve is slidably connected to an inner wall of the housing, one end of the inlet pipe passes through the drain valve and is sealedly and fixedly connected to the drain valve, and the other end is extending out of the highest water level of the water tank and is provided with the intake valve for realizing or cutting off the connection between the intake pipe and atmosphere; the float is fixed on the intake pipe; wherein when the intake valve is opened, the float drives the drain valve to move upwards, and the water inlet is connected to the injection duct. 
     
     
         8 . The water pre-storable toilet as claimed in  claim 6 , wherein the intake valve comprises a weight and a pulling member; the weight and the pulling member are connected; one end of the intake pipe extending out of the highest water level of the water tank is provided with an opening; wherein when the pulling member is pulled, the weight leaves the opening, and the intake pipe is connected to the atmosphere, and when the pulling member is released, the weight falls to block the opening, and the connection between the intake pipe and the atmosphere is cut off. 
     
     
         9 . The water pre-storable toilet as claimed in  claim 7 , wherein the intake valve comprises a weight and a pulling member; the weight and the pulling member are connected; one end of the intake pipe extending out of the highest water level of the water tank is provided with an opening; wherein when the pulling member is pulled, the weight leaves the opening, and the intake pipe is connected to the atmosphere, and when the pulling member is released, the weight falls to block the opening, and the connection between the intake pipe and the atmosphere is cut off. 
     
     
         10 . The water pre-storable toilet as claimed in  claim 6 , wherein the intake valve comprises a cylinder, an upper cover, a plug, a pulling member, and a spring; an opening is provided between the cylinder and the intake pipe; the pulling member is connected to the plug, the upper cover is fixed to the cylinder and a through-hole is provided thereon for the pulling member or the plug to pass through; the spring is provided between the plug and the upper cover; wherein when the pulling member is pulled, the plug leaves the opening, and the intake pipe is connected to the atmosphere, and when the pulling member is released, the spring is reset and drives the plug to block the opening, and the connection between the intake pipe and the atmosphere is cut off. 
     
     
         11 . The water pre-storable toilet as claimed in  claim 7 , wherein the intake valve comprises a cylinder, an upper cover, a plug, a pulling member, and a spring; an opening is provided between the cylinder and the intake pipe; the pulling member is connected to the plug, the upper cover is fixed to the cylinder and a through-hole is provided thereon for the pulling member or the plug to pass through; the spring is provided between the plug and the upper cover; wherein when the pulling member is pulled, the plug leaves the opening, and the intake pipe is connected to the atmosphere, and when the pulling member is released, the spring is reset and drives the plug to block the opening, and the connection between the intake pipe and the atmosphere is cut off. 
     
     
         12 . The water pre-storable toilet as claimed in  claim 6 , wherein the intake valve comprises a pressing member, a spring, a plug, and a cover; the pressing member comprises a pressing portion and a connecting portion, the cover is fixed to the intake pipe and a via is provided thereon, and the connecting portion passes through the via and is fixedly connected to the plug located in the intake pipe; the spring is provided between the pressing portion and the cover; wherein when the pressing member is pressed, the plug leaves the via, and the intake pipe is connected to the atmosphere, and when the pulling member is released, the spring is reset and drives the plug to block the via, and the connection between the intake pipe and the atmosphere is cut off. 
     
     
         13 . The water pre-storable toilet as claimed in  claim 7 , wherein the intake valve comprises a pressing member, a spring, a plug, and a cover; the pressing member comprises a pressing portion and a connecting portion, the cover is fixed to the intake pipe and a via is provided thereon, and the connecting portion passes through the via and is fixedly connected to the plug located in the intake pipe; the spring is provided between the pressing portion and the cover; wherein when the pressing member is pressed, the plug leaves the via, and the intake pipe is connected to the atmosphere, and when the pulling member is released, the spring is reset and drives the plug to block the via, and the connection between the intake pipe and the atmosphere is cut off.