Patent Publication Number: US-2022220716-A1

Title: Water outlet box of pressure-type flushing system and toilet using the water outlet box

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to the field of sanitary ware, in particular to a water outlet box of a pressure-type flushing system and a toilet using the water outlet box. 
     A toilet generally includes two parts, a seat body and a water tank, wherein the water tank is installed with a flushing system therein to flush the toilet. The commonly used flushing system uses the principle of gravity, that is, converting water&#39;s gravitational potential energy into water&#39;s kinetic energy to flush the toilet. However, this flushing system requires a large amount of water, and the water tank must be raised to a certain height, otherwise the flushing effect cannot be achieved. 
     At present, there is a pressure-type flushing system on the market. By setting a pressure water tank, the pressure energy accumulated by the compressed gas in the pressure water tank is used to make the water in the pressure water tank generate a strong flushing force when released, so as to achieve the effect of flushing the toilet. Since this pressure-type flushing system uses pressure energy for flushing, the ideal flushing effect can be achieved with a small amount of water, which is energy-saving and environmentally friendly. The functional devices of the pressure-type flushing system, such as drain valve, drain valve control component, solenoid valve, and pressure stabilizing valve, all achieve corresponding functions by draining, and the discharged water cannot flow into the ceramic installed with the pressure flushing system; otherwise, it will cause water flow to accumulate in the ceramic and affect the use effect of the functional devices. Therefore, water must be discharged to the flushing pipe of the toilet, resulting in a complicated communication structure of the existing toilet flushing pipes. 
     BRIEF SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a water outlet box of a pressure-type flushing system and a toilet using the water outlet box, so as to achieve the pressure relief or water discharge of the functional devices of the pressure-type flushing system, thereby simplifying the communication structure of the toilet flushing pipes. 
     To attain the above objective, the solutions of the present invention are as follows: 
     A water outlet box of a pressure-type flushing system, wherein it comprises a water outlet box main body and a first one-way valve assembly. The water outlet box main body is formed with a water-passing cavity, a water inlet, at least one water outlet and a vent, with the water inlet, the water outlet and the vent all being in communication with the water-passing cavity. The first one-way valve assembly is provided relative to the water inlet to open or block the water inlet. When the pressure-type flushing system finishes flushing, the first one-way valve assembly blocks the water inlet. The vent is provided at a top part of the water-passing cavity and is open to atmosphere. The water outlet box main body is provided with several water inlet pipes in communication with functional devices of the pressure-type flushing system. The water inlet pipes are in communication with the water-passing cavity to realize pressure relief or water discharge of the functional devices. 
     The water-passing cavity is divided into a first cavity and a second cavity. The second cavity is located above the first cavity, and a communication hole is provided between the first cavity and the second cavity. The water inlet and the water outlet are both in communication with the first cavity, wherein the water inlet is provided relative to the communication hole. The vent is provided at a top part of the second cavity, and the water inlet pipes are in communication with the second cavity. The first one-way valve assembly is provided relative to the communication hole to open or block the communication hole. When the pressure-type flushing system starts flushing, the first one-way valve assembly blocks the communication hole. 
     The water outlet box of the pressure-type flushing system further comprises a water outlet pipe which is in communication with the water outlet. The water outlet pipe is provided with a second one-way valve assembly. The second one-way valve assembly blocks the water outlet when water flow in the water outlet pipe flows to the water-passing cavity. 
     The water outlet box main body is provided with a discharge pipe, and two ends of the discharge pipe are in communication with the water outlet pipe and the second cavity respectively. 
     The water outlet box body is divided into an upper shell and a lower shell, and the upper shell and the lower shell cooperate with each other in a sealed manner. The second cavity is formed in the upper shell, and the first cavity is formed in the lower shell. 
     The first one-way valve assembly includes a valve sheet and sealing rubber pads. Two sides of the valve sheet are each provided with one of the sealing rubber pads. 
     The water outlet box of the pressure-type flushing system further comprises a third one-way valve assembly. The third one-way valve assembly is provided relative to the vent to open or block the vent. When the pressure-type flushing system finishes flushing, the third one-way valve assembly opens the air vent. 
     The third one-way valve assembly comprises a movable member and a sealing ring. The movable member is movably installed in the vent, and the sealing ring is sleeved on an outer periphery of the movable member and movably blocks the vent along with movement of the movable member. An upper end of the movable member is formed with a hook which is movably hooked on an upper peripheral edge of the vent to prevent the movable member from downwardly disengaging from the vent by gravity. 
     The functional devices of the pressure-type flushing system comprise at least one of a drain valve, a drain valve control component, a solenoid valve and a pressure stabilizing valve of the pressure-type flushing system. 
     A toilet comprises a pressure-type flushing system, a flushing pipe, and a water outlet box of the aforementioned pressure-type flushing system. The water inlet of the water outlet box main body is in communication with a water outlet end of the pressure-type flushing system, and the water outlet of the water outlet box main body is in communication with the flushing pipe. 
     Beneficial Effects 
     After adopting the above structure, the present invention connects the functional devices of the pressure-type flushing system to the water-passing cavity, which can realize the pressure relief or water discharge of the functional devices and ensure the pressure balance inside the pressure-type flushing system, so that the functional devices does not need to be directly connected to the flushing pipe of the toilet, thereby simplifying the communication structure of the toilet. By arranging the first one-way valve assembly in the water-passing cavity to movably block the water inlet, the anti-siphoning function of the water outlet box main body can be realized; and by setting the vent to connect to the atmosphere, it can be ensured that the pressure inside the water-passing cavity is consistent with the atmosphere, and no negative pressure will be generated, thereby preventing the water flow from the water outlet from being sucked backwards. The present invention is provided independent of the pressure water tank setting of the pressure-type flushing system, and it can be installed according to the required height, which further improves the anti-siphoning effect. 
     In addition, when the number of water outlets is multiple, the present invention can realize the function of water flow diversion and supply water to different pipes of the toilet. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is the first perspective view of the embodiment of the present invention. 
         FIG. 2  is the second perspective view of the embodiment of the present invention. 
         FIG. 3  is a front view of the embodiment of the present invention. 
         FIG. 4  is a top view of the embodiment of the present invention. 
         FIG. 5  is a side view of the embodiment of the present invention. 
         FIG. 6  is a cross-sectional view along the A-A direction in the assembled state of  FIG. 3 . 
         FIG. 7  is a schematic view of the water flow of the present invention when the pressure-type flushing system is in the state of water storage (section A-A in  FIG. 3 ). 
         FIG. 8  is a schematic view of the water flow of the water outlet pipe when the pressure-type flushing system is in the state of water storage (section B-B in  FIG. 4 ). 
         FIG. 9  is a schematic view of the water flow of the present invention when the pressure-type flushing system is in the drain state (section A-A in  FIG. 3 ). 
         FIG. 10  is a schematic view of the water flow of the water outlet pipe when the pressure-type flushing system is in the drain state (section B-B in  FIG. 4 ). 
         FIG. 11  is a schematic view of the structure of the toilet of the present invention. 
     
    
    
     DESCRIPTION OF THE NUMBERS IN THE FIGURES 
     
         
         
           
               1 : Water outlet box main body;  1 A: Upper shell;  1 B: Lower shell;  11 : Water-passing cavity;  111 : First cavity;  112 : Second cavity;  12 : Water inlet;  13 : Water outlet;  14 : Vent;  15 : Communication hole;  16 : Discharge Pipe;  17 : Overflow groove;  18 : Water blocking piece;  2 : First one-way valve assembly;  21 : Valve sheet;  22 : Sealing rubber pad;  3 : Water inlet pipe;  4 : Water outlet pipe;  5 : Second one-way valve assembly;  6 : Third one-way valve assembly;  61 : Movable member;  611 : Hook;  62 : Sealing ring 
           
         
       
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In order to further explain the technical solutions of the present invention, the following will describe the present invention in detail through specific embodiments. 
     As illustrated in  FIGS. 1 to 10 , the present invention is a water outlet box of a pressure-type flushing system, which comprises a water outlet box main body  1  and a first one-way valve assembly  2 . The water outlet box main body  1  is formed with a water-passing cavity  11 , a water inlet  12 , at least one water outlet  13  and a vent  14 , with the water inlet  12 , the water outlet  13  and the vent  14  all being in communication with the water-passing cavity  11 . The first one-way valve assembly  2  is provided relative to the water inlet  12  to open or block the water inlet  12 . When the pressure-type flushing system finishes flushing, the first one-way valve assembly  2  blocks the water inlet  12 . The vent  14  is provided at a top part of the water-passing cavity  11  and is open to atmosphere. When the toilet is blocked or the tap water supply stops, negative pressure is generated inside the pressure-type flushing system, and air from the atmosphere enters through the vent  14 . The first one-way valve assembly  2  blocks the water inlet  12  by air pressure to prevent siphoning. In addition, the air pressure in the water-passing cavity  11  is consistent with the atmosphere to prevent negative pressure from being generated, and backflow of water in the toilet is prevented. 
     The water outlet box main body  1  is provided with several water inlet pipes  3  in communication with the functional devices of the pressure-type flushing system, and the water inlet pipes  3  are in communication with the water-passing cavity  11  to realize the pressure relief or water discharge of the functional devices. The functional devices comprise at least one of a drain valve, a drain valve control component, a solenoid valve, and a pressure stabilizing valve, so as to realize the pressure stability inside the pressure-type flushing system and keep the water flow inside the system. 
     In order to prevent the inflow of the water inlet  12  and the discharged water of the functional devices from colliding with each other when the pressure-type flushing system is draining, and prevent the functions of the functional devices from being affected by the backflow of the discharged water, the water-passing cavity  11  of the present invention is divided into a first cavity  111  and a second cavity  112 . The second cavity  112  is located above the first cavity  111 , and a communication hole  15  is provided between the first cavity  111  and the second cavity  112 . The water inlet  12  and the water outlet  13  are both in communication with the first cavity  111 , wherein the water inlet  12  is provided relative to the communication hole  15 . The vent  14  is provided at a top part of the second cavity  112 , and the water inlet pipes  3  are in communication with the second cavity  112 . The first one-way valve assembly  2  is provided relative to the communication hole  15  to open or block the communication hole  15 . When the pressure-type flushing system starts flushing, the first one-way valve assembly  2  blocks the communication hole  15 . 
     The present invention further comprises a water outlet pipe  4  which is in communication with the water outlet  13 . The water outlet pipe  4  is provided with a second one-way valve assembly  5 , and the second one-way valve assembly  5  blocks the water outlet  13  when the water flow in the water outlet pipe  4  flows to the water-passing cavity  11 , thereby allowing the water flow of the water outlet pipe  4  to discharge only but disallowing backflow, thereby further improving the anti-siphoning effect of the present invention. 
     The water outlet box main body  1  is provided with a discharge pipe  16 , and two ends of the discharge pipe  16  are in communication with the water outlet pipe  4  and the second cavity  112  respectively, so as to realize the rapid discharge of water and air in the second cavity  112 , which eventually flows into the toilet for flushing. When the number of water outlets  13  is greater than one (i.e. the number of water outlet pipes  4  is greater than one; for example, when there are two water outlet pipes  4  as shown in  FIG. 11 , one being in communication with a rim flushing pipe  300  of the toilet and one being in communication with a main flushing pipe  200  of the toilet), the discharge pipe  16  is eventually in communication with the rim flushing pipe  300  of the toilet. 
     The water outlet box main body  1  is divided into an upper shell  1 A and a lower shell  1 B, and the upper shell  1 A and the lower shell  1 B cooperate with each other in a sealed manner. The second cavity  112  is formed in the upper shell  1 A, and the first cavity  111  is formed in the lower shell  1 B, so that the first cavity  111  and the second cavity  112  are formed when demolding the water outlet box main body  1  during manufacture. 
     The first one-way valve assembly  2  comprises a valve sheet  21  and sealing rubber pads  22 . Two sides of the valve sheet  21  are each provided with one of the sealing rubber pads  22 . The sealing rubber pads  22  on the two sides movably block the water inlet  12  and the communication hole  15  respectively. 
     The present invention further comprises a third one-way valve assembly  6 . The third one-way valve assembly  6  is provided relative to the vent  14  to open or block the vent  14 . When the pressure-type flushing system finishes flushing, the third one-way valve assembly  6  opens the vent  14 . The third one-way valve assembly  6  comprises a movable member  61  and a sealing ring  62 . The movable member  61  is movably installed in the vent  14  and the sealing ring  62  is sleeved on an outer periphery of the movable member  61  and movably blocks the vent  14  along with the movement of the movable member  61 . An upper end of the movable member  61  is formed with a hook  611  which is movably hooked on an upper peripheral edge of the vent  14  to prevent the movable member  61  from downwardly disengaging from the vent  14  by gravity, thereby ensuring the operation stability of the third one-way valve assembly  6 . 
     An overflow groove  17  is formed on a top part of the water outlet box main body  1 , and the vent  14  is in communication with the overflow groove  17 . The overflow groove  17  is used to temporarily store the water flowing out of the vent  14  to prevent the water from splashing from the vent  14 , thereby preventing the operation status of other functional devices of the pressure-type flushing system from being affected. A water blocking piece  18  is provided at an opening of the overflow groove  17 , and the water blocking piece  18  partially covers the opening of the overflow groove  17  to achieve ventilation and further prevent water splashing. 
     The water outlet box of the pressure-type flushing system can be installed on any toilet that needs to improve the anti-siphoning effect. 
     As illustrated in  FIGS. 7 and 8 , when the pressure-type flushing system is in the water storage state, the first one-way valve assembly  2  swings downward under the action of gravity and blocks the water inlet  12 , and the third one-way valve assembly  6  moves downward by gravity and opens the vent  14 . At this time, the first cavity  111  and the second cavity  112  are connected to the atmosphere, and a small amount of water inflow in the second cavity  112 , i.e. the water flow released from pressure by the drain valve, the opening valve, the solenoid valve and the pressure stabilizing valve, respectively flows into the first cavity  111  and the discharge pipe  16 , and is eventually discharged from the water outlet  13 . In addition, the second one-way valve assembly  5  swings downward under the action of gravity and counter-current water pressure, and eventually blocks the water outlet  13 . When the number of the water outlets  13  is greater than one, what is blocked is the water outlet  13  which is in communication with the main flushing pipe of the toilet. 
     As illustrated in  FIGS. 9 and 10 , when the pressure-type flushing system is in a draining state, the first one-way valve assembly  2  swings upward under the action of water pressure, and the water flow enters the first cavity  111  and is diverted to the second cavity  112  and the water outlet  13 . Only a small amount of water flows into the second cavity  112  because the first one-way valve assembly  2  will be lifted by the water flow to block the communication hole  15 . The water flow in the second cavity  112  lifts up the third one-way valve assembly  6  to block the vent  14  to prevent the water flow from splashing out of the water outlet box main body  1 . At this time, the second one-way valve assembly  5  is pushed open by the water flow to achieve drainage. 
     As illustrated in  FIGS. 6 and 11 , the water outlet box can be applied to a toilet, and the functional devices of the pressure-type flushing system  100  are connected to the water outlet box main body  1  to realize pressure relief or water discharge of the functional devices. The water inlet  12  of the water outlet box main body  1  is in communication with a water outlet end of the pressure-type flushing system  100 , and the water outlet  13  of the water outlet box main body  1  is in communication with a flushing pipe. In this embodiment, the flushing pipe of the toilet comprises a main flushing pipe  200  and a rim flushing pipe  300 , and the water outlet box can realize the diversion of the drainage of the pressure-type flushing system  100 . 
     With the above structure, the present invention connects the functional devices of the pressure-type flushing system to the water-passing cavity  11 , which can realize the pressure relief or water discharge of the functional devices and ensure the pressure balance inside the pressure-type flushing system, so that the functional devices do not need to be directly connected to the flushing pipe of the toilet, thereby simplifying the communication structure of the toilet. By arranging the first one-way valve assembly  2  in the water-passing cavity  11  to movably block the water inlet  12 , the anti-siphoning function of the water outlet box main body  1  can be realized; and by setting the vent  14  to connect to the atmosphere, it can be ensured that the pressure inside the water-passing cavity  11  is consistent with the atmosphere, and no negative pressure will be generated, thereby preventing the water flow from the water outlet  13  from being sucked backwards. The present invention is provided independent of the pressure water tank of the pressure-type flushing system, and it can be installed according to the required height, which further improves the anti-siphoning effect. 
     In addition, when the number of water outlets  13  is multiple, the present invention can realize the function of water flow diversion and supply water to different pipes of the toilet. 
     The above-mentioned embodiments and drawings do not limit the product form and style of the present invention, and any appropriate changes or modifications made by those of ordinary skill in the art should be regarded as not departing from the patent scope of the present invention.