Four-way distribution valve and toilet flushing system

Abstract

The present invention discloses a four-way distribution valve and a toilet flushing system, which includes a valve body assembly and a switching component. The valve body assembly is provided with a first water inlet cavity, a second water inlet cavity, a first communication cavity, a first water outlet cavity, a second water outlet cavity, a second communication cavity and a movable water stop component. The first communication cavity is in communication with the second communication cavity. There is a first communication port between the first communication cavity and the first water inlet cavity, and a second communication port between the first communication cavity and the second water inlet cavity. The movable water stop component is movably arranged in the first communication cavity, and when water enters the first water inlet cavity, it is pushed by the water pressure to close the second communication port; when water enters the second water inlet cavity, it is pushed by the water pressure to close the first communication port. The switching component is arranged in the valve body assembly and controls the communication between the second communication cavity and the first water outlet cavity or the communication between the second communication cavity and the second water outlet cavity. Therefore, the free switching between the water inlet of the water pump and the water inlet of the tap water can be realized, two-way water inlet and two-way water outlet can be achieved, and the requirement for the motor torque for the water outlet switching is low.

Description

Technical Field

[0001] The present invention relates to the field of distribution valves, and particularly to a four-way distribution valve and a toilet flushing system. Background Art

[0002] As an important component for water path distribution, the distribution valve has received extensive attention in the sanitary ware field. Among them, in the field of toilets, for the inlet water path distribution, most distribution valves are one-inlet-two-outlet types. They mainly use single inlet water to achieve the water outlet for the rim flushing and the jet flushing. It is easy to have a situation where the inlet water path is difficult to meet the water supply requirements for the rim flushing and the jet flushing. Therefore, tap water inlet or pump-pressurized water inlet can be used to achieve the rim flushing and the jet flushing to solve this problem. The pump-pressurized water can only achieve water inlet when the water pump is powered on. When the water pump is powered off, the tap water pipeline can be switched to provide water inlet; or when the tap water pipeline is short of water, the pump-pressurized water can be used to provide water inlet to meet the water inlet requirements in different scenarios. Therefore, there is an urgent need for a two-inlet-two-outlet distribution valve to achieve the inlet water path distribution of tap water or pump-pressurized water and the outlet water path distribution of rim flushing or jet flushing.

[0003] Most of the existing distribution valves are one-inlet-two-outlet types. For the outlet water path distribution, the main implementation method is to use a stepping motor to control the rotation of the switching piece to achieve the switching of the two water outlets, which cannot meet the requirements of two-inlet-two-outlet. Moreover, the switching piece bears the water pressure, and the switching force is relatively large, which requires a high torque for the stepping motor. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies existing in the prior art and provide a four-way distribution valve and a toilet flushing system.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A four-way distribution valve includes a valve body assembly and a switching component. The valve body assembly is provided with a first inlet cavity, a second inlet cavity, a first communication cavity, a first outlet cavity, a second outlet cavity, a second communication cavity, and a movable water stop component. The first inlet cavity is provided with a first water inlet, the second inlet cavity is provided with a second water inlet, the first outlet cavity is provided with a first water outlet, the second outlet cavity is provided with a second water outlet. The first communication cavity is in communication with the second communication cavity. There is a first communication port between the first communication cavity and the first inlet cavity, and a second communication port between the first communication cavity and the second inlet cavity. The movable water stop component is movably arranged in the first communication cavity, and when the first inlet cavity is filled with water, it is pushed by the water pressure to close the second communication port; when the second inlet cavity is filled with water, it is pushed by the water pressure to close the first communication port; the switching component is arranged in the valve body assembly and controls the second communication cavity to communicate with the first outlet cavity or the second communication cavity to communicate with the second outlet cavity.

[0007] Preferably, the first communication cavity is an annular columnar space arranged outside the second water inlet cavity, and the movable water stop member includes a water stop valve plate sleeved on the outer wall of the second water inlet cavity and limited to move between the first communication port and the second communication port.

[0008] Preferably, the switching assembly includes a first water stop diaphragm, a second water stop diaphragm and a sliding rod. The first water stop diaphragm is sleeved on one end of the sliding rod, and the second water stop diaphragm is sleeved on the other end of the sliding rod. There is a third communication port between the second communication cavity and the first water outlet cavity, and a fourth communication port between the second communication cavity and the second water outlet cavity. The first water stop diaphragm divides the second communication cavity into a water passing cavity and a back pressure cavity. The first water stop diaphragm is provided with a small hole communicating the water passing cavity and the back pressure cavity. The back pressure cavity is provided with a pressure relief port. When the pressure relief port is opened, the sliding rod is pushed by the water pressure in the water passing cavity to move towards one end, and the second water stop diaphragm closes the fourth communication port. At the same time, the first water stop diaphragm opens the third communication port; when the pressure relief port is closed, the sliding rod is pushed by the back pressure of the back pressure cavity to move towards the other end, and the first water stop diaphragm closes the third communication port. At the same time, the second water stop diaphragm opens the fourth communication port.

[0009] Preferably, the water passing cavity includes a first cavity and a second cavity. The third communication port is arranged between the first cavity and the first water outlet cavity, and the fourth communication port is arranged between the first cavity and the second cavity. The second cavity is communicated with the second water outlet cavity. The sliding rod slidably penetrates through the first cavity, and a part of it is hermetically penetrated out of the first cavity and enters the second cavity. The second water stop diaphragm is arranged in the second cavity.

[0010] Preferably, the switching assembly further includes a driving mechanism, and the driving mechanism controls the opening or closing of the pressure relief port.

[0011] Preferably, the driving module includes a switching pull rod and a pressure relief port opening and closing assembly. By moving the switching pull rod to a first state or a second state, the pressure relief port opening and closing assembly is driven to open or close the pressure relief port.

[0012] Preferably, the driving module further includes a motor and a switching rotor. The switching rotor is driven by the motor. The switching rotor drives the switching pull rod to move, and the switching rotor is provided with a first driving part for moving the switching pull rod to the first state and a second driving part for moving the switching pull rod to the second state.

[0013] Preferably, the valve body assembly is further provided with an air port communicating with the second water inlet cavity, and the air port is controlled to open and close by an anti-siphon float arranged in the second water inlet cavity.

[0014] Preferably, the anti-siphon float is arranged on the communication path between the second water inlet chamber and the first communication chamber, and is pushed by the water inlet pressure in the second water inlet chamber to close the air port.

[0015] A toilet flushing system includes a pump pressure water inlet pipe, a tap water inlet pipe, a spray pipe, a brush ring pipe and the above four-way distribution valve. The first water inlet is connected to the pump pressure water inlet pipe, the second water inlet is connected to the tap water inlet pipe, the first water outlet is connected to the spray pipe, and the second water outlet is connected to the brush ring pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) An adaptive switching device is provided to realize the free switching between the water inlet of the water pump and the tap water inlet, and two-way water inlet and two-way water outlet can be realized;

[0018] (2) The water outlet adopts the principle of a back pressure diaphragm to realize switching. The switching switch mainly controls the opening and closing of the pressure relief port. The force required for the actuator to open the valve is not affected by the water pressure, and the requirement for the motor torque is low.

[0019] (3) An anti-siphon device is provided at the top of the valve to prevent water from flowing back and polluting the tap water source. Description of the Drawings

[0020] Figure 1 It is a perspective view of the four-way distribution valve according to the first embodiment of the present application;

[0021] Figure 2 It is a schematic diagram of the valve body assembly of the four-way distribution valve according to the first embodiment of the present application;

[0022] Figure 3 It is an exploded view of the valve body assembly of the four-way distribution valve according to the first embodiment of the present application;

[0023] Figure 4 It is a schematic diagram of the switching assembly of the four-way distribution valve according to the first embodiment of the present application;

[0024] Figure 5 It is an exploded view of the switching assembly of the four-way distribution valve according to the first embodiment of the present application;

[0025] Figure 6 It is a schematic diagram of water inlet in the first water inlet chamber of the four-way distribution valve according to the first embodiment of the present application Figure 1 ;

[0026] Figure 7 It is a schematic diagram of water inlet in the first water inlet chamber of the four-way distribution valve according to the first embodiment of the present application Figure 2 ;

[0027] Figure 8 Schematic diagram of water inlet in the first water inlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 3 ;

[0028] Figure 9 Schematic diagram of water inlet in the second water inlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 1 ;

[0029] Figure 10 Schematic diagram of water inlet in the second water inlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 2 ;

[0030] Figure 11 Schematic diagram of water outlet in the second water outlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 1 ;

[0031] Figure 12 Schematic diagram of water outlet in the second water outlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 2 ;

[0032] Figure 13 Schematic diagram of the switching of the switching component of the four-way distribution valve in Embodiment 1 of the present application;

[0033] Figure 14 Schematic diagram of water outlet in the first water outlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 1 ;

[0034] Figure 15 Schematic diagram of water outlet in the first water outlet cavity of the four-way distribution valve in Embodiment 1 of the present application Figure 2 ;

[0035] Figure 16 Stereogram of the four-way distribution valve in Embodiment 2 of the present application;

[0036] Figure 17 Schematic diagram of the valve body assembly of the four-way distribution valve in Embodiment 2 of the present application

[0037] Figure 18 Exploded view of the valve body assembly of the four-way distribution valve in Embodiment 2 of the present application

[0038] Figure 19 Schematic diagram of water inlet in the first water inlet cavity of the four-way distribution valve in Embodiment 2 of the present application Figure 1 ;

[0039] Figure 20 Schematic diagram of water inlet in the first water inlet cavity of the four-way distribution valve in Embodiment 2 of the present application Figure 2 ;

[0040] Figure 21Schematic diagram of water inlet in the first water inlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 3 ;

[0041] Figure 22 Schematic diagram of water inlet in the second water inlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 1 ;

[0042] Figure 23 Schematic diagram of water inlet in the second water inlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 2 ;

[0043] Figure 24 Schematic diagram of water inlet in the second water inlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 3 ;

[0044] Figure 25 Schematic diagram of water outlet in the second water outlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 1 ;

[0045] Figure 26 Schematic diagram of water outlet in the second water outlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 2 ;

[0046] Figure 27 Schematic diagram of the switching of the switching component of the four-way distribution valve in the second embodiment of the present application;

[0047] Figure 28 Schematic diagram of water inlet in the first water outlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 1 ;

[0048] Figure 29 Schematic diagram of water inlet in the first water outlet cavity of the four-way distribution valve in the second embodiment of the present application Figure 2 ;

[0049] Reference numerals: 100, valve body assembly; 200, switching component; 300, movable water stop component; 101, first water inlet cavity; 102, second water inlet cavity; 103, first communication cavity; 104, first communication port; 105, second communication port; 106, first water outlet cavity; 107, second water outlet cavity; 108, second communication cavity; 109, third communication port; 110, fourth communication port; 111, connecting pipe; 301, water stop valve disc; 201, first water stop diaphragm; 202, second water stop diaphragm; 203, slide bar; 204, water passing cavity; 205, back pressure cavity; 206, pressure relief port; 207, small hole; 208, sealing ring; 209, first cavity; 210, second cavity; 211, motor; 212, switching rotor; 213, switching pull rod; 214, fixed bracket; 215, transmission rod; 216, connecting block; 217, plug; 218, return spring; 219, anti-siphon float; 220, air port; 221, anti-siphon cover. Detailed implementation manners

[0050] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. The drawings of the present invention are only schematic for easier understanding of the present invention, and the specific proportions can be adjusted according to design requirements. The up-down relationship of the relative components and the definition of the front / back in the described figures should be understood by those skilled in the art as referring to the relative positions of the components. Therefore, they can all be flipped to present the same components, and this should all fall within the scope disclosed in this specification.

[0051] Embodiment 1

[0052] Reference Figure 1-15, embodiments of the present application provide a four-way distribution valve, which includes a valve body assembly 100 and a switching component 200. The valve body assembly 100 is provided with a first water inlet chamber 101, a second water inlet chamber 102, a first communication chamber 103, a first water outlet chamber 106, a second water outlet chamber 107, a second communication chamber 108, and a movable water stop member 300. The first water inlet chamber 101 is provided with a first water inlet, the second water inlet chamber 102 is provided with a second water inlet, the first water outlet chamber 106 is provided with a first water outlet, and the second water outlet chamber 107 is provided with a second water outlet. The first water inlet chamber 101 is connected to the first communication chamber 103, and there is a first communication port 104 between the first communication chamber 103 and the first water inlet chamber 101. The second water inlet chamber 102 is connected to the first communication chamber 103, and there is a second communication port 105 between the first communication chamber 103 and the second water inlet chamber 102. The movable water stop member 300 is movably disposed in the first communication chamber 103, and when water enters the first water inlet chamber 101, it is pushed by water pressure to close the second communication port 105; when water enters the second water inlet chamber 102, it is pushed by water pressure to close the first communication port 104. By means of the movable water stop member 300 disposed in the first communication chamber 103, the conduction of the first water inlet path between the first water inlet chamber 101 and the first communication chamber 103 or the conduction of the second water inlet path between the second water inlet chamber 102 and the first communication chamber 103 is switched. The first communication chamber 103 is communicated with the second communication chamber 108, the first water outlet chamber 106 is connected to the second communication chamber 108, and the second water outlet chamber 107 is connected to the second communication chamber 108. The switching component 200 is disposed in the valve body assembly 100 and controls the communication between the second communication chamber 108 and the first water outlet chamber 106 or the communication between the second communication chamber 108 and the second water outlet chamber 107. By means of the switching component 200, the conduction of the first water outlet path between the first water outlet chamber 106 and the second communication chamber 108 or the conduction of the second water outlet path between the second water outlet chamber 107 and the second communication chamber 108 is switched.

[0053] In a specific embodiment, referring to Figure 6-10 , the first communication chamber 103 is an annular columnar space disposed outside the second water inlet chamber 102. The movable water stop member 300 includes a water stop valve piece 301 sleeved on the outer wall of the second water inlet chamber 102 and limited to move between the first communication port 104 and the second communication port 105. Preferably, the water stop valve piece 301 is a one-way water stop valve piece. In one of the embodiments, a connecting pipe 111 is hermetically fixed in the valve body assembly 100 to form the second water inlet chamber 102 with the valve body assembly 100. Two limiting convex edges are provided on the outer wall of the connecting pipe 111. The water stop valve piece 301 is sleeved on the outer wall of the connecting pipe 111 and is limited to move between the two limiting convex edges. Specifically, in the initial state, under the action of the gravity of the water stop valve piece 301, the water stop valve piece 301 is at the first communication port 104, so that the second water inlet chamber 102 is communicated with the first communication chamber 103, and the first water inlet chamber 101 is cut off from the first communication chamber 103; referring toFigure 6-8 When the first water inlet cavity 101 is filled with water, the water pressure pushes the water stop valve piece 301 to move from the first communication port 104 to the second communication port 105 and block the second communication port 105, so that the first water inlet cavity 101 is communicated with the first communication cavity 103, and the second water inlet cavity 102 is cut off from the first communication cavity 103; refer to Figure 9-10 When the second water inlet cavity 102 is filled with water, the water pressure pushes the water stop valve piece 301 to abut against the first communication port 104 and block the first communication port 104, so that the second water inlet cavity 102 is communicated with the first communication cavity 103, and the first water inlet cavity 101 is cut off from the first communication cavity 103. Therefore, the water entering the first water inlet cavity 101 can be prevented from entering the second water inlet cavity 102, or the water entering the second water inlet cavity 102 can be prevented from entering the first water inlet cavity 101. In this application, the free switching between the first water inlet cavity 101 and the second water inlet cavity 102 is realized by the water pressure push of different water inlet waterways. The water entering the first water inlet cavity 101 or the second water inlet cavity 102 enters the first communication cavity 103, and the first communication cavity 103 is communicated with the second communication cavity 108. Therefore, it also enters the second communication cavity 108 immediately. In the second communication cavity 108, the switching assembly 200 is used to realize the switching of the communication with the first water outlet cavity 106 or the second water outlet cavity 107 and the water outlet.

[0054] In a specific embodiment, the switching component 200 includes a first water stop diaphragm 201, a second water stop diaphragm 202 and a slide rod 203. The first water stop diaphragm 201 is sleeved on one end of the slide rod 203, and the second water stop diaphragm 202 is sleeved on the other end of the slide rod 203. There is a third communication port 109 between the second communication cavity 108 and the first water outlet cavity 106, and a fourth communication port 110 between the second communication cavity 108 and the second water outlet cavity 107. The slide rod 203 is limited to move within the second communication cavity 108, so that the first water stop diaphragm 201 blocks the third communication port 109 and the second water stop diaphragm 202 opens the fourth communication port 110, or the first water stop diaphragm 201 opens the third communication port 109 and the second water stop diaphragm 202 blocks the fourth communication port 110. The first water stop diaphragm 201 divides the second communication cavity 108 into a water passing cavity 204 and a back pressure cavity 205. A back pressure membrane is provided on the side of the first water stop diaphragm 201 close to the back pressure cavity 205. The back pressure membrane is in a horn shape and has a large surface area. A blocking portion is provided on the side close to the water passing cavity 204. The blocking portion is opposite to the third communication port 109, and the area of the blocking portion is slightly larger than the communication area of the third communication port 109. A pressure relief port 206 is provided in the back pressure cavity 205. A small hole 207 communicating the water passing cavity 204 and the back pressure cavity 205 is provided on the first water stop diaphragm 201. Moreover, the surface area of the first water stop diaphragm 201 on the side close to the back pressure cavity 205 is larger than the surface area on the side close to the water passing cavity 204, so that when the pressure relief port 206 is closed, the pressure receiving surface in the back pressure cavity 205 is larger than the pressure receiving surface in the water passing cavity 204. The pressure difference between the two sides of the first water stop diaphragm 201 is used to drive the slide rod 203 to move left and right, so as to realize the communication between the second communication cavity 108 and the first water outlet or the second water outlet respectively. The structure has good reliability and is more labor-saving in operation. In addition, a sealing ring 208 is sleeved outside the slide rod 203, so that when the slide rod 203 slides up and down to realize the water path switching, the one-way conduction between the second communication cavity 108 and the first water outlet or the second water outlet is realized, and the simultaneous conduction between the second communication cavity 108 and the first water outlet and the second water outlet is avoided. Reference Figure 13-15 , when the pressure relief port 206 is opened, the back pressure in the back pressure cavity 205 is relieved and the pressure drops. Since the aperture of the small hole 207 is small, the water inlet of the back pressure cavity 205 is relatively slow, and the water inlet of the water passing cavity 204 is fast. Therefore, at this time, the water inlet pressure of the water passing cavity 204 is greater than that of the back pressure cavity 205. Driven by the water pressure in the water passing cavity 204, the slide rod 203 moves towards one end, and the second water stop diaphragm 202 closes the fourth communication port 110, and at the same time the first water stop diaphragm 201 opens the third communication port 109. Reference Figure 11-12, when the pressure relief port 206 is closed, the water inlet in the water passing cavity 204 enters the back pressure cavity 205 through the small hole 207. Due to the large pressure receiving surface of the back pressure cavity 205, the back pressure in the back pressure cavity 205 pushes the sliding rod 203 to move towards the other end, and the first water stop diaphragm 201 closes the third communication port 109, while the second water stop diaphragm 202 opens the fourth communication port 110.

[0055] In a specific embodiment, the water passing cavity 204 includes a first cavity 209 and a second cavity 210. The third communication port 109 is provided between the first cavity 209 and the first water outlet cavity 106, the fourth communication port 110 is provided between the first cavity 209 and the second cavity 210, the second cavity 210 is communicated with the second water outlet cavity 107, the sliding rod 203 slidably penetrates through the first cavity 209, and a part of it is hermetically penetrated out of the first cavity 209 and enters the second cavity 210, and the second water stop diaphragm 202 is arranged in the second cavity 210.

[0056] Specifically, a fixing bracket is provided at one end of the sliding rod 203 for clamping the first water stop diaphragm 201. A thin water column is provided at a position of the fixing bracket corresponding to the small hole 207, and the thin water column penetrates through the small hole 207; one end of the sliding rod 203 passes through the third communication port 109, and the other end passes through the fourth communication port 110. The first water stop diaphragm 201 is located outside the third communication port 109, and the second water stop diaphragm 202 is located outside the fourth communication port 110.

[0057] Specifically, a sealing ring 208 is also sleeved on the sliding rod 203, and the sealing ring 208 is in sealing cooperation with the third communication port 109 when the sliding rod 203 passes through the third communication port 109. Further, the radial cross section of the sealing ring 208 is V-shaped.

[0058] In a specific embodiment, refer to Figure 4 , the switching component 200 further includes a driving mechanism, and the driving mechanism controls the opening or closing of the pressure relief port 206. Specifically, the driving module includes a motor 211, a switching rotor 212, a switching pull rod 213 and a pressure relief port 206 opening and closing component. The pressure relief port 206 is driven to open or close by moving the switching pull rod 213 to the first state or the second state. In one embodiment, the pressure relief port 206 opening and closing component includes a fixed bracket 214, a transmission rod 215, a connecting block 216, a plug 217 and a return spring 218. The switching pull rod 213 is hinged to one end of the transmission rod 215 for controlling the movement of the transmission rod 215; the fixed bracket 214 has an inner cavity, the other end of the transmission rod 215 is placed in the inner cavity and is connected to the plug 217 for opening and closing the pressure relief port 206 through the connecting block 216, and the return spring 218 is sleeved outside the connecting block 216 for resetting the plug 217. In other embodiments, other equivalent or similar mechanisms can also be used to realize the opening and closing of the pressure relief port 206. Refer to Figure 13, the switching rotor 212 is driven by the motor 211. The switching rotor 212 drives the switching pull rod 213 to move. The switching rotor 212 is provided with a first driving part for moving the switching pull rod 213 to the first state and a second driving part for moving the switching pull rod 213 to the second state. When the first driving part of the switching rotor 212 contacts the switching pull rod 213, the switching pull rod 213 is in the first state. At this time, the pressure relief port 206 is in the open state, realizing the opening of the first water stop diaphragm 201 to the third communication port 109, the blocking of the second water stop diaphragm 202 to the fourth communication port 110, closing the second water outlet channel, and the water inlet in the second communication cavity 108 flowing out from the first water outlet cavity 106; when the second driving part of the switching rotor 212 contacts the switching pull rod 213, the switching pull rod 213 is in the second state. At this time, the pressure relief port 206 is in the closed state, realizing the blocking of the first water stop diaphragm 201 to the third communication port 109, the opening of the second water stop diaphragm 202 to the fourth communication port 110, closing the first water outlet channel, and the water inlet in the second communication cavity 108 flowing out from the second water inlet cavity 102. In other embodiments, a mechanical switch or a solenoid valve switch can also be used in the driving module to realize the movement of the switching pull rod 213. The switching between the first water outlet channel and the second water outlet channel is mainly achieved by controlling the opening and closing of the pressure relief port 206. The force required for the actuating mechanism to open the pressure relief port 206 is not affected by the water pressure, and the torque requirement for the motor 211 is low.

[0059] An embodiment of the present application also provides a toilet flushing system, including a pump pressure water inlet pipe, a tap water inlet pipe, a jet pipe, a brush ring pipe, and the above four-way distribution valve. The pump pressure water inlet pipe can be connected to a water pump, the tap water inlet pipe is connected to a angle valve. The first water inlet is connected to the pump pressure water inlet pipe, the second water inlet is connected to the tap water inlet pipe, the first water outlet is connected to the jet pipe to realize jet water outlet, and the second water outlet is connected to the brush ring pipe to realize brush ring water outlet. The first water inlet and the second water inlet of the four-way distribution valve of the present application can be respectively connected to the pump pressure water inlet pipe and the tap water inlet pipe. When the toilet is in the powered-on state and the water pump connected to the pump pressure water inlet pipe is also in the open state, the pump pressure water inlet pipe can continuously supply water into the first water inlet cavity 101 to meet the water pressure requirements for jet water outlet or brush ring water outlet; when the toilet is in the powered-off state and the water pump is in the closed state, the water pressure in the pump pressure water inlet pipe is insufficient. At this time, the angle valve can be opened to allow the water inlet in the tap water inlet pipe to enter the second water inlet cavity 102, and the water inlet pressure of the tap water can meet the water pressure requirements for jet water outlet or brush ring water outlet.

[0060] Specifically, an anti-siphon valve is provided at the tap water inlet pipe or the connection between the tap water inlet pipe and the second water inlet to prevent sewage diversion and pollution of the tap water source when there is negative pressure at the front-end water source.

[0061] Embodiment Two

[0062] The difference between the second embodiment and the first embodiment of this application lies in that: an anti-siphon valve is also integrated on the valve body assembly 100. Refer to Figure 16-29 , in a specific embodiment, the valve body assembly 100 is further provided with an air port 220 communicating with the second water inlet chamber 102, and the opening and closing of the air port 220 is controlled by an anti-siphon float 219 disposed in the second water inlet chamber 102. Specifically, the anti-siphon float 219 is disposed on the communication path between the second water inlet chamber 102 and the first communication chamber 103, and is pushed by the water inlet pressure in the second water inlet chamber 102 to close the air port 220. In one embodiment, the air port 220 is disposed on an anti-siphon cover 221, and the anti-siphon cover 221 is installed above the second water inlet chamber 102. The anti-siphon float 219 is disposed at the top of the connecting pipe 111 and is limited to move between the top of the connecting pipe 111 and the air port 220. In the initial state, the anti-siphon float 219 is located at the top of the connecting pipe 111 under the action of gravity. At this time, the air port 220 is open, and the inside of the valve body assembly 100 is in communication with the air, which can prevent sewage diversion and pollution of the tap water source when there is negative pressure at the front-end water source. When water enters the second water inlet chamber 102, under the push of the water inlet pressure, the anti-siphon float 219 blocks the air port 220, and the channel to the air is closed. The water continues to flow into the first communication chamber 103 and pushes the water stop valve piece 301 to block the second communication port 105, and the water will not flow into the first water inlet chamber 101.

[0063] The rest is the same as that of the first embodiment and will not be described in detail here.

[0064] The above embodiments are only used to further illustrate the technical solutions of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention all fall within the protection scope of the technical solutions of the present invention.

Claims

1. A four-way distribution valve, characterized in that: It includes a valve body assembly and a switching component. The valve body assembly is provided with a first water inlet chamber, a second water inlet chamber, a first communication chamber, a first water outlet chamber, a second water outlet chamber, a second communication chamber and a movable water stop component. The first water inlet chamber is provided with a first water inlet, the second water inlet chamber is provided with a second water inlet, the first water outlet chamber is provided with a first water outlet. A connecting pipe is hermetically fixed in the valve body assembly to form the second water inlet chamber with the valve body assembly. The second water outlet chamber is provided with a second water outlet. The first communication chamber is communicated with the second communication chamber. There is a first communication port between the first communication chamber and the first water inlet chamber, and a second communication port between the first communication chamber and the second water inlet chamber. The movable water stop component is movably arranged in the first communication chamber and is pushed by water pressure to close the second communication port when the first water inlet chamber intakes water; when the second water inlet chamber intakes water, it is pushed by water pressure to close the first communication port. The movable water stop component includes a water stop valve piece sleeved on the outer wall of the connecting pipe and limited to move between the first communication port and the second communication port. The switching component is arranged in the valve body assembly and controls the communication between the second communication chamber and the first water outlet chamber or the communication between the second communication chamber and the second water outlet chamber.

2. The four-way distribution valve according to claim 1, characterized in that: The first communication chamber is an annular columnar space arranged outside the second water inlet chamber.

3. The four-way distribution valve according to claim 1, wherein: The switching component includes a first water stop diaphragm, a second water stop diaphragm and a sliding rod. The first water stop diaphragm is sleeved on one end of the sliding rod, and the second water stop diaphragm is sleeved on the other end of the sliding rod. There is a third communication port between the second communication chamber and the first water outlet chamber, and a fourth communication port between the second communication chamber and the second water outlet chamber. The first water stop diaphragm divides the second communication chamber into a water passing chamber and a back pressure chamber. The first water stop diaphragm is provided with small holes communicating the water passing chamber and the back pressure chamber. The back pressure chamber is provided with a pressure relief port. When the pressure relief port is opened, the sliding rod is pushed by the water pressure in the water passing chamber to move towards one end, and the second water stop diaphragm closes the fourth communication port. At the same time, the first water stop diaphragm opens the third communication port; when the pressure relief port is closed, the sliding rod is pushed by the back pressure of the back pressure chamber to move towards the other end, and the first water stop diaphragm closes the third communication port. At the same time, the second water stop diaphragm opens the fourth communication port.

4. The four-way distribution valve according to claim 3, wherein: The water passing chamber includes a first cavity and a second cavity. The third communication port is arranged between the first cavity and the first water outlet chamber, and the fourth communication port is arranged between the first cavity and the second cavity. The second cavity is communicated with the second water outlet chamber. The sliding rod slidably penetrates through the first cavity, and a part of it hermetically penetrates out of the first cavity and enters the second cavity. The second water stop diaphragm is arranged in the second cavity.

5. The four-way distribution valve according to claim 3, characterized in that: The switching component further includes a driving mechanism, and the driving mechanism controls the opening or closing of the pressure relief port.

6. The four-way distribution valve according to claim 5, characterized in that: The driving module includes a switching pull rod and a pressure relief port opening and closing component, and the movement of the switching pull rod to the first state or the second state is used to drive the pressure relief port opening and closing component to open or close the pressure relief port.

7. The four-way distribution valve according to claim 6, characterized in that: The driving module further includes a motor and a switching rotor. The switching rotor is driven by the motor, and the switching rotor drives the switching pull rod to move. Moreover, a first driving portion for moving the switching pull rod to the first state and a second driving portion for moving the switching pull rod to the second state are provided on the switching rotor.

8. The four-way distribution valve according to claim 1, wherein: The valve body assembly is further provided with an air port communicating with the second water inlet chamber, and the opening and closing of the air port are controlled by an anti-siphon float disposed in the second water inlet chamber.

9. The four-way distribution valve according to claim 8, characterized in that: The anti-siphon float is disposed on the communication path between the second water inlet chamber and the first communication chamber, and is pushed by the water inlet pressure in the second water inlet chamber to close the air port.

10. A toilet flushing system, characterized in that: It includes a pump pressure water inlet pipe, a tap water inlet pipe, a spray pipe, a brush ring pipe, and the four-way distribution valve according to any one of claims 1-9. The first water inlet is connected to the pump pressure water inlet pipe, the second water inlet is connected to the tap water inlet pipe, the first water outlet is connected to the spray pipe, and the second water outlet is connected to the brush ring pipe.

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