Water flow control structure, integrated flushing valve and closestool flushing system

Abstract

The water flow control structure comprises a valve body, a valve cover and a first switching mechanism, the valve body is provided with a first water passing part and a second water passing part, a first valve cavity is defined by the valve cover and the valve body, and the first switching mechanism comprises a first diaphragm assembly and a first control part. The first diaphragm assembly divides the first valve cavity into a first water flow cavity and a first back pressure cavity, the first water flow cavity communicates with the first water passing part, the valve deck is provided with a first pressure relief cavity, a first pressure relief hole is formed between the first pressure relief cavity and the first back pressure cavity, and the first control part controls the first pressure relief hole to be opened or closed. The first diaphragm assembly controls whether the first water flow cavity is communicated with the second water passing part or not according to the water pressure change of the first backpressure cavity; and the first pressure relief cavity is communicated with the second water passing part through a linear pressure relief water channel. According to the utility model, the use of two steel balls can be reduced, the assembly cost is reduced, and the reliability after assembly is improved.

Description

Technical Field

[0001] The utility model relates to the field of sanitary ware, in particular to a water flow control structure and an integrated flushing valve and a toilet flushing system. Background Art

[0002] At present, the flushing method of smart toilets generally adopts low-tank flushing or tankless flushing with tap water. Low-tank flushing has poor flushing effect due to the low water level in the water tank, so water pumps are generally used for pressurization. The water pump pressurizes the water in the water tank and then sends it to the distribution valve, which controls the brush ring water channel and the jet water channel of the toilet. Tankless flushing with tap water generally connects the water channel to the flushing valve, and two solenoid valves control the brush ring water channel and the jet water channel respectively, and directly uses tap water for flushing.

[0003] However, the low-tank flushing method consumes a lot of power from the water pump, and the water pump cannot work when the power is off, rendering the toilet unusable; the non-tank flushing method uses two solenoid valves to control the water circuit, which is more expensive.

[0004] In order to solve the above problems, a hybrid integrated valve has appeared in the prior art, which can be used for low water tank flushing to solve the problem that the water pump cannot work when the power is off and the toilet cannot be flushed. It can also be used for non-water tank flushing. It uses a stepper motor to provide driving force. Compared with the prior art that uses a solenoid valve to control the water circuit, the cost is lower. Figure 1 ' As shown in the figure, the first water passing part of the hybrid integrated valve adopts a diaphragm assembly 3' to control whether water enters or not. The diaphragm assembly 3' divides the valve cavity composed of the valve body 1' and the valve cover 2' into a water flow cavity 11' and a back pressure cavity 12'. The water flow cavity 11' is connected to the first water passing part arranged on the valve body 1, and the water flow cavity 11' is connected to the back pressure cavity 12' through a small hole arranged on the diaphragm assembly 3'; the valve cover 2' is provided with a pressure relief cavity 22', and a pressure relief hole 21' is provided between the pressure relief cavity 22' and the back pressure cavity 12'. The pressure relief hole 21' is controlled to open and close by a control component 4', so that the diaphragm assembly 3' controls whether the water flow cavity 11' is connected to the water passing part 13' arranged on the valve body according to the water pressure change of the back pressure cavity 12'. The pressure relief chamber 22' is connected to the water passing part 13' through a pressure relief water channel, and the pressure relief water channel is composed of an L-shaped water channel 23' provided on the valve cover 2' and another L-shaped water channel 14' provided on the valve body 1'. Since the two sides of each L-shaped water channel are formed by core pulling during the injection molding process, it is necessary to block the port on one side with a steel ball 5'. This requires two steel balls 5' to be assembled on the pressure relief water channel, which increases the assembly process and is more costly. In addition, if the steel ball 5' is not crimped well, there is a risk of falling off, resulting in poor product reliability. Utility Model Content

[0005] The utility model aims at the technical problems existing in the prior art and provides a water flow control structure, an integrated flushing valve and a toilet flushing system.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a water flow control structure, including a valve body, a valve cover and a first switching mechanism, the valve body is provided with a first water flow portion and a second water flow portion, the valve cover is connected to the valve body, and the two surround a first valve cavity, the first switching mechanism includes a first diaphragm assembly and a first control component, the first diaphragm assembly is arranged in the first valve cavity, and the first valve cavity is divided into a first water flow cavity and a first back pressure cavity, the first water flow cavity is connected to the first water flow portion, and the first water flow cavity is connected to the first back pressure cavity through a small hole arranged on the first diaphragm assembly; the valve cover is provided with a first pressure relief cavity, a first pressure relief hole is arranged between the first pressure relief cavity and the first back pressure cavity, the first control component controls whether the first pressure relief hole is opened or not, so that the first diaphragm assembly controls whether the first water flow cavity is connected to the second water flow portion according to the water pressure change of the first back pressure cavity; the first pressure relief cavity and the second water flow portion are connected through a linear pressure relief waterway.

[0007] Furthermore, the pressure relief water channel includes an inclined water channel arranged on the valve cover and a water flow hole arranged on the valve body and connected to the second water flow part, one end of the inclined water channel is connected to the first pressure relief chamber, and the other end of the inclined water channel is connected to the water flow hole.

[0008] Furthermore, the first pressure relief hole is located on the side of the first back pressure chamber and also includes a water-blocking cover, which is located in the first back pressure chamber and extends upward, and the water-blocking cover separates the first back pressure chamber into a first water channel and a second water channel, the first water channel and the second water channel are connected through the water gap between the upper end of the water-blocking cover and the valve cover and / or the valve body, and the second water channel is connected to the first pressure relief hole.

[0009] Furthermore, the water-blocking cover is connected to the valve cover.

[0010] Furthermore, the first diaphragm assembly includes a water inlet diaphragm, a first support plate and a first spring. The water inlet diaphragm is mounted on the first support plate, and the edges of the water inlet diaphragm are pressed against the valve body by the valve cover. The first support plate is provided with a first small hole. The first spring is located in the first back pressure cavity and presses against the first support plate, and one end of the first spring passes through the first small hole to prevent the first small hole from being blocked.

[0011] The utility model further provides an integrated flushing valve, including a water circuit switching module, which includes a first water outlet, a second water outlet and a second switching mechanism, and also includes a water flow control structure as described in the utility model above, wherein the first water flow portion is a water inlet, the second water flow portion is a water flow channel, and the second switching mechanism controls the water flow channel to be connected to the first water outlet or the second water outlet.

[0012] Furthermore, the water path switching module also includes a second valve chamber, the second switching mechanism includes a second switching component and a second control component for connecting the second switching component, the second switching component is arranged in the second valve chamber, and controls the water passage to be connected with the first water outlet or the second water outlet; it also includes a driving module, the driving module is located between the first control component and the second control component, and the driving module controls whether the first control component and the second control component are in action; the driving module includes a stepper motor and a switching rotor, the stepper motor is installed on the valve cover, the switching rotor is installed on the output shaft of the stepper motor, and the switching rotor is provided with a first driving part and a second driving part, the switching rotor has a first working state in which the first control component is pushed by its first driving part, and a second working state in which the first control component is first pushed by the first driving part and then the second control component is pushed by the second driving part.

[0013] Furthermore, the second switching component is a second diaphragm assembly, which divides the second valve chamber into a second water flow chamber and a second back pressure chamber. The second water flow chamber is connected to the water outlet end of the water passage, and the second water flow chamber is connected to the second back pressure chamber through a second small hole provided on the second diaphragm assembly. The second back pressure chamber is provided with a second pressure relief hole. The second control component controls whether the second pressure relief hole is opened or not, so that the second diaphragm assembly controls the second water flow chamber to be connected to the first water outlet or the second water outlet according to the water pressure change in the second back pressure chamber; the valve cover is provided with a second pressure relief chamber connected to the second pressure relief hole, the second control component is installed in the second pressure relief chamber, and the valve cover is also provided with a pressure relief port connected to the second pressure relief chamber.

[0014] The utility model further provides a toilet flushing system, including the integrated flushing valve as described in the utility model above, the water inlet is connected to a normal pressure water source, the first water outlet is connected to a wash ring water path of a toilet body, and the second water outlet is connected to a jet water path of the toilet.

[0015] Furthermore, it also includes a water tank, a water pump and a distribution valve, the water inlet end of the water pump is connected to the water tank, and the water outlet end of the water pump is connected to the jet water path of the toilet.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The first pressure relief chamber and the second water passing part are connected through a linear pressure relief water channel, so that the pressure relief water channel can be directly formed by core pulling during injection molding, and there is no need to use steel balls to block the port. Therefore, the utility model can reduce the use of two steel balls and two steel ball pressing processes, which is conducive to reducing assembly costs and improving reliability after assembly.

[0018] 2. The pressure relief water channel includes an inclined water channel arranged on the valve cover and a water hole arranged on the valve body. The inclined water channel can be used to avoid the first valve cavity and make the overall structure more compact.

[0019] 3. The setting of the water-blocking cover makes the water path of the first back pressure chamber turn upward and then flow to the first pressure relief hole, which is conducive to the discharge of air inside the first back pressure chamber when the first pressure relief hole is opened, thereby making the first diaphragm assembly more stable when opened and closed, and avoiding abnormal noise.

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the water flow control structure, integrated flushing valve and toilet flushing system of the utility model are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 ' is a cross-sectional view of a hybrid integrated valve in the prior art;

[0022] Figure 1 It is an exploded schematic diagram of the utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 3 It is a cross-sectional view of the valve body of the utility model;

[0025] Figure 4 This is an exploded schematic diagram of the first water passing part of the utility model (the valve body and valve cover are partially shown);

[0026] Figure 5 is a cross-sectional view of the first control component of the utility model;

[0027] Figure 6 It is an exploded schematic diagram of the switching part of the utility model (the valve body and valve cover are partial);

[0028] Figure 7 It is an exploded schematic diagram of the driving part of the utility model (the valve cover is a partial embodiment);

[0029] Figure 8 It is a structural schematic diagram of the driving part of the utility model (the valve cover is a partial embodiment);

[0030] Fig. 9 It is a structural schematic diagram of the utility model in a closed state of the first switching mechanism (partial cross-section);

[0031] Fig.10 It is a structural schematic diagram of the utility model in the open state of the first switching mechanism (partial cross-section);

[0032] Fig.11 It is a schematic diagram of water inlet of the water passage of the utility model;

[0033] Fig.12 It is a structural schematic diagram of the utility model in the water outlet state at the first water outlet (partial cross-section);

[0034] Fig.13 It is a structural schematic diagram of the utility model in the water outlet state at the second water outlet (partial cross-section);

[0035] In the figure, 1, valve body, 11, water inlet, 12, water passage, 13, first water outlet, 14, second water outlet, 15, first valve chamber, 151, first water flow chamber, 152, first back pressure chamber, 1521, first water path, 1522, second water path, 153, first connecting port, 16, second valve chamber, 161, second water flow chamber, 162, second back pressure chamber, 163, second connecting port, 164, third connecting port, 17, water replenishment port, 18, opening, 19, water passage hole, 2, valve cover, 21, first pressure relief hole, 22, first pressure relief chamber, 23, inclined water channel, 24, second pressure relief hole, 25, second pressure relief chamber, 26, pressure relief port, 3, first diaphragm assembly, 31, water inlet diaphragm, 32, The first support plate, 33, the first spring, 4, the first control component, 41, the shell, 42, the guide rod, 43, the sealing pad, 44, the piston head, 45, the return spring, 46, the gasket, 47, the first sealing ring, 48, the second sealing ring, 49, the first rocker arm, 5, the second diaphragm assembly, 51, the switching diaphragm, 52, the second support plate, 53, the sliding rod, 54, the sealing pad, 6, the second control component, 69, the second rocker arm, 7, the driving module, 71, the stepping motor, 72, the switching rotor, 721, the first driving part, 722, the second driving part, 723, the operating part, 73, the motor shield, 74, the waterproof ring, 8, the water-proof cover, 9, the anti-siphon float, 10, the upper end cover, 101, the atmospheric port. DETAILED DESCRIPTION

[0036] In the present invention, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance.

[0037] In addition, in the description of the present invention, unless otherwise specified, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Fig. 9 , Fig.10 As shown, a water flow control structure of the utility model includes a valve body 1, a valve cover 2 and a first switching mechanism, the valve body 1 is provided with a first water passing portion and a second water passing portion, the valve cover 2 is connected to the valve body 1, and the two surround a first valve chamber 15, the first switching mechanism includes a first diaphragm assembly 3 and a first control component 4, the first diaphragm assembly 3 is arranged in the first valve chamber 15, and the first valve chamber 15 is divided into a first water flow chamber 151 and a first back pressure chamber 152, the first water flow chamber 151 is connected to the first water passing portion, and the first water flow chamber 151 is connected to the first back pressure chamber 152 through a first small hole arranged on the first diaphragm assembly 3; the valve cover 2 is provided with a first pressure relief chamber 22, a first pressure relief hole 21 is arranged between the first pressure relief chamber 22 and the first back pressure chamber 152, the first control component 4 controls whether the first pressure relief hole 21 is opened or not, so that the first diaphragm assembly 3 controls whether the first water flow chamber 151 is connected to the second water passing portion according to the water pressure change of the first back pressure chamber 152. Specifically, a first communication port 153 is provided between the first water flow cavity 151 and the water inlet end of the water passage 12 , and the first diaphragm assembly 3 controls whether the first communication port 153 is opened or not.

[0039] The first pressure relief chamber 22 is connected to the second water passage portion through a linear pressure relief water channel. Fig. 9 As shown, the pressure relief water channel includes an inclined water channel 23 provided on the valve cover 2 and a water through hole 19 provided on the valve body 1 and connected to the water through channel 12. One end of the inclined water channel 23 leads to the first pressure relief chamber 22, and the other end of the inclined water channel 23 is connected to the water through hole 19. In this way, the utility model can reduce the use of two steel balls and two steel ball pressing processes, which is conducive to reducing assembly costs, improving product reliability, and making the overall structure more compact.

[0040] like Fig. 9As shown, the first pressure relief hole 21 is located on the side of the first back pressure chamber 152. The utility model also includes a water-blocking cover 8, which is located in the first back pressure chamber 152 and extends upward. The water-blocking cover 8 divides the first back pressure chamber 152 into a first waterway 1521 and a second waterway 1522. The first waterway 1521 and the second waterway 1522 are connected through the water gap between the upper end of the water-blocking cover 8 and the valve cover 2 and / or the valve body 1, and the second waterway 1522 is connected to the first pressure relief hole 21. When the pressure is released, the water in the first back pressure chamber 152 goes up along the first waterway 1521, turns downward into the second waterway 1522 at the upper end of the water-blocking cover 8 through the water gap between it and the valve cover 2, and flows to the first pressure relief hole 21 along the second waterway 1522. In this way, when the first pressure relief hole 21 is opened, the air at the top of the first back pressure chamber 152 can be discharged, so that the first diaphragm assembly 3 is more stable when opened and closed, and abnormal noise is avoided. Specifically, the isolation cover 8 is screwed to the valve cover 2.

[0041] See also Figure 1-Figure 13 As shown, an integrated flushing valve of the utility model includes a water circuit switching module, which includes a first water outlet 13, a second water outlet 14 and a second switching mechanism, and also includes a water flow control structure as described in the utility model above, wherein the first water flow portion is a water inlet 11, the second water flow portion is a water flow channel 12, and the second switching mechanism controls the water flow channel 12 to communicate with the first water outlet 13 or the second water outlet 14. In other embodiments, the first water flow portion is a water inlet, and the second water flow portion is a water outlet.

[0042] Furthermore, the water circuit switching module also includes a second valve chamber 16, the second switching mechanism includes a second switching component and a second control component for connecting the second switching component to the action, the second switching component is arranged in the second valve chamber, and controls the water passage 12 to be connected with the first water outlet 13 or the second water outlet 14.

[0043] In this embodiment, the water circuit switching module also includes a valve body and a valve cover, and the valve body of the water circuit switching module is integrally formed with the valve body 1 of the above-mentioned water flow control structure, and the valve cover of the water circuit switching module is integrally formed with the valve cover 2 of the above-mentioned water flow control structure, and the above-mentioned second valve cavity is formed by the valve body 1 and the valve cover 2.

[0044] The utility model further comprises a driving module 7, which is mounted on the valve cover 2 and is located between the first control component 4 and the second control component 6, and the driving module 7 controls whether the first control component 4 and the second control component 6 are in motion. Figure 7 , Figure 8As shown, the driving module 7 includes a stepper motor 71 and a switching rotor 72. The stepper motor 71 is installed on the valve cover 2. Specifically, the valve cover 2 is provided with a mounting cavity for the stepper motor 71. The stepper motor 71 is installed in the mounting cavity of the valve cover 2 by using a motor shield 73 and a waterproof ring 74. The switching rotor 72 is installed on the output shaft of the stepper motor 71, and the switching rotor 72 is provided with a first driving part 721 and a second driving part 722. The switching rotor 72 has a first working state in which the first control component 4 is pushed by the first driving part 721 and a second working state in which the first control component 4 is pushed by the first driving part 721 and the second control component 6 is pushed by the second driving part 722. The first driving part 721 and the second driving part 722 are provided at the same end edge of the switching rotor 72 and are distributed along the circumference of the switching rotor 72. The circumferential dimension of the first driving part 721 is greater than the circumferential dimension of the second driving part 722. Specifically, the first driving part 721 is arc-shaped and the second driving part 722 is block-shaped. The switching rotor 72 is also provided with an operating portion 723 suitable for manually rotating the switching rotor 72 .

[0045] like Figure 4 , Fig. 9 As shown, the first diaphragm assembly 3 includes a water inlet diaphragm 31, a first support plate 32 and a first spring 33. The water inlet diaphragm 31 is mounted on the first support plate 32, and the edges of the water inlet diaphragm 31 are pressed against the valve body 1 by the valve cover 2. The first support plate 32 is provided with a first small hole. The first spring 33 is located in the first back pressure cavity 152 and presses against the first support plate 32 along the arrangement direction of the first back pressure cavity 152 and the first water flow cavity 151. One end of the first spring 33 passes through the first small hole to prevent the first small hole from being blocked.

[0046] like Figure 5 As shown, the first control component 4 includes a housing 41, a guide rod 42, a gasket 46, a first sealing ring 47, a second sealing ring 48, a return spring 45, a piston head 44 and a sealing rubber pad 43. The housing 41 is installed in the first pressure relief chamber 22 of the valve cover 2, and the first sealing ring 47 is matched between the two. The guide rod 42 is inserted into the housing 41, and the second sealing ring 48 is matched between the two. One end of the guide rod 42 located in the housing 41 is press-fitted with the piston head 44 by interference, and the sealing rubber pad 43 is sleeved on the piston head 44, and opens and closes the first pressure relief hole 21 with the axial movement of the piston head 44. The return spring 45 is sleeved outside the guide rod 42 and is stretched between the piston head 44 and the gasket 46 sleeved on the guide rod 42. One end of the guide rod 42 located outside the housing 41 is movably connected with a first swing rod 49, which is roughly L-shaped and is used to receive the push of the above-mentioned first driving part 721.

[0047] In the present embodiment, the second switching component is a second diaphragm assembly 5, which divides the second valve chamber 16 into a second water flow chamber 161 and a second back pressure chamber 162. The second water flow chamber 161 is connected to the water channel 12, and the second water flow chamber 161 is connected to the second back pressure chamber 162 through a second small hole provided on the second diaphragm assembly 5. The second back pressure chamber 162 is provided with a second pressure relief hole 24. The second control component 6 controls whether the second pressure relief hole 24 is opened or not, so that the second diaphragm assembly 5 controls the second water flow chamber 161 to be connected to the first water outlet 13 or the second water outlet 14 according to the water pressure change of the second back pressure chamber 162; the valve cover 2 is provided with a second pressure relief chamber 25 connected to the second pressure relief hole 24, the second control component 6 is installed in the second pressure relief chamber 25, and the valve cover 2 is also provided with a pressure relief port 26 (such as Figure 8 As shown in Figure 6 , Fig.12 As shown, the second diaphragm assembly 5 includes a switching diaphragm 51, a second supporting plate 52, a sliding rod 53, a sealing gasket 54 and a second spring 55. The switching diaphragm 51 is sleeved on the second supporting plate 52, and the edges of the switching diaphragm 51 are pressed against the valve body 1 by the valve cover 2. The second supporting plate 52 is sleeved on one end of the sliding rod 53, and the sealing gasket 54 is sleeved on the other end of the sliding rod 53. The second supporting plate 52 is provided with a second small hole. The second spring 55 is located in the second back pressure chamber 162 and presses against the second supporting plate 52 along the arrangement direction of the second back pressure chamber 162 and the second water flow chamber 161. One end of the second spring 55 passes through the second small hole to prevent the second small hole from being blocked. A second communication port 163 is provided between the first water flow chamber 151 and the first water outlet 13, a third communication port 164 is provided between the first water flow chamber 151 and the second water outlet 14, the second communication port 163 and the third communication port 164 are coaxially arranged, the sliding rod 53 is passed through the second communication port 163 and the third communication port 164, the sealing gasket 54 controls whether the second communication port 163 is opened or not, and the switching diaphragm 51 controls whether the third communication port 164 is opened or not. The structure of the second control component 6 is consistent or substantially consistent with that of the first control component 4, and will not be described here. The second swing rod 69 of the second control component 6 is roughly L-shaped, and is used to receive the push of the above-mentioned second drive part 722.

[0048] In this embodiment, the second valve chamber 16 is provided with an air port 101 leading upward to the outside, and an anti-siphon float 9 is provided between the air port 101 and the water outlet end of the water passage 12. When the water outlet end of the water passage 12 discharges water, the anti-siphon float 9 is pushed upward by the water flow and closes the air port 101. When the water outlet end of the water passage 12 stops discharging water, the anti-siphon float 9 drops and opens the air port 101, thereby preventing siphoning from occurring inside the valve body 1 due to negative pressure. Specifically, as Figure 3As shown, the top of the valve body 1 is provided with an opening 18 leading to the second water flow chamber 161 of the second valve chamber 16, and the opening 18 is connected to the upper end cover 10, and the air port 101 is provided on the upper end cover 10. The valve body 1 is also provided with a water replenishment port 17 for replenishing water to the water tank, and the water replenishment port 17 is connected to the water inlet 11.

[0049] The utility model is an integrated flushing valve. When in use, its first water outlet 13 is connected to the brush ring water path of the toilet, and its second water outlet 14 is connected to the spray water path of the toilet. Its working principle is as follows:

[0050] In the standby state, the switching rotor 72 is in the initial position. At this time, the first swing rod 49 of the first water passing part and the second swing rod 69 of the switching part are both under force, and the flushing valve stops water.

[0051] When the stepper motor 71 controls the switching rotor 72 to rotate 30±10°, the first swing rod 49 is pressurized, so that the first control component 4 opens the first pressure relief hole 21, and the water in the first back pressure chamber 152 flows to the water passage 12 through the first pressure relief hole 21, the first pressure relief chamber 22, and the inclined water channel 23 in sequence (the flow path of the pressure relief water is as shown in FIG. Fig. 9 , Fig.10 As shown by the dotted line in the figure, the first diaphragm assembly 3 opens the first communication port 153, and the normal pressure water flows to the water inlet channel through the water inlet 11, the first water flow cavity 151, and the first communication port 153, and flows to the first water outlet 13 through the second water flow cavity 161 and the opened second communication port 163, and finally flows out from the first water outlet 13, as shown in FIG. Fig.12 As shown, it is convenient to flush the toilet with the brush ring.

[0052] When the stepper motor 71 controls the switching rotor 72 to rotate 60±10°, the first swing rod 49 and the second swing rod 69 are both pressurized, the first diaphragm assembly 3 opens the first communication port 153, the switching diaphragm 51 opens the third communication port 164, and the sealing gasket 54 closes the second communication port 163, so that the inlet water flows out from the second water outlet 14. Fig.13 As shown, so as to facilitate jet flushing of the toilet.

[0053] The utility model provides a toilet flushing system, comprising the integrated flushing valve of the utility model, wherein the water inlet 11 is connected to a normal pressure water source, the first water outlet 13 is connected to a wash ring water path of a toilet body, and the second water outlet 14 is connected to a jet water path of the toilet.

[0054] The utility model also includes a water tank and a water pump, wherein the water inlet of the water pump is connected to the water tank, and the water outlet of the water pump is connected to the jet water path of the toilet. Specifically, the jet water path of the toilet includes a jet nozzle having two jet channels, wherein one jet channel is connected to the second water outlet 14, and the other jet channel is connected to the water outlet of the water pump.

[0055] The utility model provides a toilet flushing system. When there is electricity, the flushing valve of the utility model is connected to a normal pressure water source (i.e., a municipal tap water source) for water supply of the brush ring water path of the toilet, and the jet water path of the toilet is supplied with water by a water pump. When the water pump cannot work normally due to power failure or other factors, the flushing valve of the utility model is connected to a normal pressure water source for water supply of the brush ring water path and the jet water path of the toilet. Therefore, the flushing valve of the utility model can be applied to both toilets with water tanks and toilets without water tanks.

[0056] The utility model provides a water flow control structure, an integrated flushing valve and a toilet flushing system, and the uninvolved parts are the same as the prior art or can be implemented by using the prior art.

[0057] The above embodiments are only used to further illustrate a water flow control structure and an integrated flushing valve and a toilet flushing system of the utility model, but the utility model 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 utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A water flow control structure, comprising a valve body, a valve cover and a first switching mechanism, the valve body is provided with a first water passing portion and a second water passing portion, the valve cover is connected to the valve body, and the two surround a first valve cavity, the first switching mechanism comprises a first diaphragm assembly and a first control component, the first diaphragm assembly is arranged in the first valve cavity, and the first valve cavity is divided into a first water flow cavity and a first back pressure cavity, the first water flow cavity is connected to the first water passing portion, and the first water flow cavity is connected to the first back pressure cavity through a small hole arranged on the first diaphragm assembly; the valve cover is provided with a first pressure relief cavity, a first pressure relief hole is arranged between the first pressure relief cavity and the first back pressure cavity, the first control component controls whether the first pressure relief hole is opened or not, so that the first diaphragm assembly controls whether the first water flow cavity is connected to the second water passing portion or not according to the water pressure change in the first back pressure cavity; it is characterized in that: The first pressure relief chamber is connected to the second water passing portion through a linear pressure relief water channel; The pressure relief water channel includes an inclined water channel arranged on the valve cover and a water flow hole arranged on the valve body and connected to the second water flow part. One end of the inclined water channel is connected to the first pressure relief chamber, and the other end of the inclined water channel is connected to the water flow hole.

2. The water flow control structure according to claim 1, characterized in that: The first pressure relief hole is located on the side of the first back pressure chamber and also includes a water-blocking cover, which is located in the first back pressure chamber and extends upward. The water-blocking cover divides the first back pressure chamber into an upward first water channel and a downward second water channel. The first water channel and the second water channel are connected through the water gap between the upper end of the water-blocking cover and the valve cover and / or the valve body, and the second water channel is connected to the first pressure relief hole.

3. The water flow control structure according to claim 2, characterized in that: The water-blocking cover is connected to the valve cover.

4. The water flow control structure according to claim 1, characterized in that: The first diaphragm assembly includes a water inlet diaphragm, a first support plate and a first spring. The water inlet diaphragm is mounted on the first support plate, and the edges of the water inlet diaphragm are pressed against the valve body by the valve cover. The first support plate is provided with a first small hole. The first spring is located in the first back pressure cavity and presses against the first support plate, and one end of the first spring passes through the first small hole to prevent the first small hole from being blocked.

5. An integrated flushing valve, comprising a waterway switching module, the waterway switching module comprising a first water outlet, a second water outlet and a second switching mechanism, characterized in that: It also includes a water flow control structure as described in any one of claims 1 to 4, wherein the first water flow portion is a water inlet, the second water flow portion is a water flow channel, and a second switching mechanism controls the water flow channel to be connected to the first water outlet or the second water outlet.

6. The integrated flushing valve according to claim 5, characterized in that: The water path switching module also includes a second valve cavity, the second switching mechanism includes a second switching component and a second control component for connecting the second switching component, the second switching component is arranged in the second valve cavity, and controls the water passage to be connected with the first water outlet or the second water outlet; it also includes a driving module, the driving module is located between the first control component and the second control component, and the driving module controls whether the first control component and the second control component are in action; the driving module includes a stepping motor and a switching rotor, the stepping motor is installed on the valve cover, the switching rotor is installed on the output shaft of the stepping motor, and the switching rotor is provided with a first driving part and a second driving part, the switching rotor has a first working state in which the first control component is pushed by its first driving part and a second working state in which the first control component is first pushed by the first driving part and then the second control component is pushed by the second driving part.

7. The integrated flushing valve according to claim 6, characterized in that: The second switching component is a second diaphragm assembly, which divides the second valve chamber into a second water flow chamber and a second back pressure chamber. The second water flow chamber is connected to the water outlet end of the water passage, and the second water flow chamber is connected to the second back pressure chamber through a second small hole arranged on the second diaphragm assembly. The second back pressure chamber is provided with a second pressure relief hole. The second control component controls whether the second pressure relief hole is opened or not, so that the second diaphragm assembly controls the second water flow chamber to be connected to the first water outlet or the second water outlet according to the water pressure change in the second back pressure chamber; the valve cover is provided with a second pressure relief chamber connected to the second pressure relief hole, the second control component is installed in the second pressure relief chamber, and the valve cover is also provided with a pressure relief port connected to the second pressure relief chamber.

8. A toilet flushing system, characterized in that: It comprises an integrated flushing valve as described in any one of claims 5-7, the water inlet is connected to a normal pressure water source, the first water outlet is connected to a wash ring water path of a toilet body, and the second water outlet is connected to a jet water path of the toilet.

9. The toilet flushing system according to claim 8, characterized in that: The utility model also comprises a water tank, a water pump and a distribution valve. The water inlet end of the water pump is connected to the water tank, and the water outlet end of the water pump is connected to the jet water path of the toilet.

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