Flow regulating valve and closestool

Abstract

The flow regulating valve comprises a valve body, a valve element and a driving mechanism, the valve element is movably connected into the valve body and can move relative to a first water outlet channel on the valve body so as to change the water outlet flow of the flow regulating valve, the driving mechanism comprises a motor and a speed regulating part, the motor is connected with the valve element, and the speed regulating part is connected with the valve element. The motor can control the valve element to move relative to the valve body, the speed adjusting piece is connected with the motor and can adjust the movement speed of the valve element, and when the flow adjusting valve is closed, the driving mechanism drives the valve element to move at a low speed, so that the water outlet flow is gradually decreased, and impact of water on the flow adjusting valve and the net pipe is reduced; therefore, the service life of the flow regulating valve and the service life of the net pipe are prolonged, and large noise generated when the valve element is controlled to move is avoided. The motor can further control the movement position of the valve element, when the water pressure in the net pipe is large, the cross section area of the water passing channel is reduced to reduce the water inlet flow, so that noise generated when water enters the water tank is small, and when the water pressure in the net pipe is small, the cross section area of the water passing channel is increased to increase the water inlet flow, so that the water inlet speed is guaranteed. And the water demand of the closestool is ensured.

Description

Technical Field

[0001] The utility model relates to the field of bathroom equipment, mainly to a flow regulating valve and a toilet. Background Art

[0002] In the existing water inlet valve of the toilet, a solenoid valve is usually used as the water inlet valve to control the on and off of the water inlet. However, when the water inlet valve of the existing toilet is closed, water hammer is easily formed, which leads to high noise and has a great impact on the service life of the pipeline. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a flow regulating valve and a toilet to solve the problem that the existing water inlet valve is prone to water hammer when cutting off the water inlet.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A flow regulating valve comprises a valve body, a valve core and a driving mechanism, wherein the valve body is provided with an inner cavity, a water inlet and a first water outlet channel, wherein the water inlet and the first water outlet channel are both connected to the inner cavity; the valve core is movably connected in the inner cavity and can move relative to the first water outlet channel to change the water outlet flow rate at the first water outlet channel; the driving mechanism comprises a motor and a speed regulating member, wherein the motor is connected to the valve core and can control the movement of the valve core relative to the valve body, and the speed regulating member is connected to the motor and can slow down the movement speed of the valve core so that when the flow regulating valve is closed, the water outlet flow rate gradually decreases.

[0006] In some embodiments of the present application, the speed regulator is a pulse controller, and the pulse controller can output a pulse frequency to the motor to control the rotation speed of the motor.

[0007] In some embodiments of the present application, the speed regulating component is a frequency converter, which is electrically connected to the motor and can change the power frequency of the motor to slow down the rotation speed of the motor; and / or the speed regulating component is a reducer, which is connected to the motor and the valve core and can slow down the rotation speed output by the motor.

[0008] In some embodiments of the present application, the driving mechanism includes a transmission structure, which connects the motor and the valve core. When the shaft of the motor rotates, it can drive the valve core to move linearly so that the valve core moves closer to or away from the first water outlet channel.

[0009] In some solutions of the present application, the transmission structure includes an eccentric rotating member and a push rod, the eccentric rotating member is arranged on the rotating shaft of the motor, and the push rod is connected to the valve core and the eccentric rotating member.

[0010] In some schemes of the present application, the transmission structure also includes a lever and a first elastic member, one end of the lever is rotatably connected to the valve body, and the other end is connected to the eccentric rotating member, and the push rod abuts against the middle part of the lever; the first elastic member connects the valve body and the valve core, and the elastic force of the first elastic member can push the push rod to abut against the lever.

[0011] In some solutions of the present application, the transmission structure includes a gear and a rack, the gear is arranged on the rotating shaft of the motor, and the rack is fixed on the valve core and meshes with the gear.

[0012] In some schemes of the present application, the valve body is also provided with an air port, which is connected to at least one of the inner cavity and the first water outlet channel; the flow regulating valve also includes an anti-siphon valve, which is arranged on the air port to control the opening and closing of the air port.

[0013] In some schemes of the present application, the air port includes a first mounting port and a second mounting port, the first mounting port connecting the outer surface of the valve body with the first water outlet channel, and the second mounting port connecting the outer surface of the valve body with the inner cavity; the anti-siphon valve includes a first anti-siphon valve and a second anti-siphon valve, the first anti-siphon valve is installed on the first mounting port, and the second anti-siphon valve is installed on the second mounting port; the valve body is also provided with a second water outlet channel, the second water outlet channel is connected to the inner cavity, and the second water outlet channel is used to be connected to an external spray gun.

[0014] A toilet comprises a water tank, a water inlet pipe and a flow regulating valve, wherein the water tank is used to store cleaning water; the water inlet pipe is connected with the water tank and an external water source; and the flow regulating valve is connected to the water inlet pipe.

[0015] Beneficial effect: The flow regulating valve of the present application includes a valve body, a valve core and a driving mechanism. The valve core is movably connected in the valve body and can move relative to the first water outlet channel on the valve body to change the water outlet flow of the flow regulating valve. The driving mechanism includes a motor and a speed regulating member. The motor is connected to the valve core and can control the movement of the valve core relative to the valve body. The speed regulating member is connected to the motor and can adjust the movement speed of the valve core. When the flow regulating valve is closed, the driving mechanism drives the valve core to move at a slower speed, so that the water outlet flow of the flow regulating valve gradually decreases, thereby reducing the impact of water on the flow regulating valve and the network pipe, extending the service life of the flow regulating valve and the network pipe, and avoiding the generation of large noise when controlling the movement of the valve core. The motor can also control the movement position of the valve core. When the water pressure in the network pipe is large, the cross-sectional area of ​​the water passage is reduced to reduce the water inlet flow, so that the noise generated when the water tank is filled with water is small. When the water pressure in the network pipe is small, the cross-sectional area of ​​the water passage is increased to increase the water inlet flow, so as to ensure the water inlet speed and the water demand of the toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a flow control valve from one perspective.

[0017] Figure 2 It is a structural schematic diagram of the flow control valve from another perspective.

[0018] Figure 3 This is a structural diagram of the flow control valve from another perspective.

[0019] Figure 4 It is a cross-sectional schematic diagram of a flow control valve in a three-dimensional state in one embodiment.

[0020] Figure 5 yes Figure 4 A local enlarged schematic diagram at point A.

[0021] Figure 6 It is a main view schematic diagram of the flow control valve.

[0022] Figure 7 It is a left view schematic diagram of the flow control valve.

[0023] Main component symbols: 1-valve body; 11-inner cavity; 12-water inlet; 13-first water outlet channel; 14-first installation port; 15-second installation port; 16-second water outlet channel; 17-main body; 174-first protrusion; 175-second protrusion; 18-first end cover; 181-first groove; 19-second end cover; 191-second groove; 2-valve core; 3-driving mechanism; 31-motor; 32-transmission structure; 321 -eccentric rotating member; 322-push rod; 323-lever; 324-first elastic member; 33-speed regulating member; 4-water passage; 5-first anti-siphon valve; 51-first limiting member; 52-first valve cover; 53-first blocking member; 6-second anti-siphon valve; 61-second limiting member; 62-second valve cover; 621-third groove; 63-second blocking member; 64-second elastic member; 71-first limiting block; 72-second limiting block. DETAILED DESCRIPTION

[0024] The utility model provides a flow regulating valve and a toilet. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0025] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The toilet of the present application includes a water tank, a water inlet pipe and a flow regulating valve. The water tank is used to store cleaning water. The water inlet pipe connects the water tank and an external water source. The flow regulating valve is connected to the water inlet pipe. The flow regulating valve can control the on-off of the water inlet pipe and the water flow rate entering the water tank, so that the water inlet noise of the water tank is not affected by the water pressure of the water source, thereby reducing the water inlet noise and avoiding affecting the user's rest.

[0028] See also Figure 1-Figure 4 as well as Figure 6 The flow regulating valve includes a valve body 1, a valve core 2 and a driving mechanism 3. The valve core 2 is movably connected in the valve body 1, and a water passage 4 is formed between the valve core 2 and the valve body 1. The driving mechanism 3 includes a motor 31, which is connected to the valve core 2, and the motor 31 can control the movement of the valve core 2 relative to the valve body 1 to change the size of the water passage 4, that is, change the water flow rate of the flow regulating valve. The water flow rate of the flow regulating valve is also the water flow rate from the water inlet pipe into the water tank. When the valve core 2 moves relative to the valve body 1, it can change the size of the water passage 4, and then change the flow rate through the flow regulating valve. When the cross-sectional area of ​​the water passage 4 becomes 0, that is, the flow regulating valve is in a completely closed state, the water source is disconnected from the water tank, that is, the water from the water source cannot enter the water tank.

[0029] In the present application, the driving mechanism 3 also includes a speed regulating member 33, which is connected to the motor 31, and the speed regulating member 33 can slow down the movement speed of the valve core 2, so that when the flow control valve is closed, the water flow rate changes in a gradually decreasing state, that is, the valve core 2 moves at a slower speed, so that the impact of water on the flow control valve and the network pipe is smaller, thereby extending the service life of the flow control valve and the network pipe, and because the impact of water on the flow control valve and the network pipe is smaller, it is avoided that a large noise is generated when controlling the movement of the valve core 2. Among them, the gradually decreasing state can be that the water flow rate of the flow control valve is proportional to or inversely proportional to the time.

[0030] For example, by controlling the driving mechanism 3, the process of switching the flow control valve from a fully open state to a fully closed state requires a relatively long time, such as 0.3-5 seconds, that is, the valve core 2 moves at a speed of 0.4cm / s-6.6cm / s. Compared with the existing electromagnetic water inlet valve, which switches to a fully closed state instantly, the present application can slow down the movement speed of the valve core 2, thereby avoiding the formation of water hammer and noise. For example, when the process of switching the flow control valve from a fully open state to a fully closed state takes 3 seconds, the movement speed of the valve core is quite slow, which hardly causes water hammer and generates no noise.

[0031] The existing electromagnetically controlled water inlet valve has only two states: "open" and "closed", resulting in a fixed flow rate of water into the water tank. If the pipe network pressure is high, the water flow rate will be large, and the noise generated will also increase, which will affect sleep late at night.

[0032] The motor 31 of the present application can also control the movement position of the valve core 2, and when the motor 31 drives the valve core 2 to move relative to the valve body 1, the water passage 4 has a closed state, a fully open state, and a semi-open state between the closed state and the fully open state, and the position of the valve core when the water passage 4 is in the semi-open state can be controlled, and then the relative position between the valve core 2 and the valve body 1 can be controlled according to the needs of the user, that is, the size of the water passage 4 can be changed. Specifically, when the water pressure in the network pipe is relatively high, the cross-sectional area of ​​the water passage 4 is reduced to reduce the water inlet flow rate, so as to reduce the noise generated when the water tank is filled with water; when the water pressure in the network pipe is relatively low, the cross-sectional area of ​​the water passage 4 is increased to increase the water inlet flow rate, so as to ensure the water inlet speed, and then ensure the water demand of the toilet.

[0033] In one embodiment, the motor 31 includes an angle detector, which detects the rotation angle of the motor 31 shaft through the angle detector to obtain the position of the valve core 2, and then the size of the water passage 4. In other embodiments, a displacement sensor is provided in the valve body 1, and the displacement distance of the valve core 2 is detected by the displacement sensor to obtain the size of the water passage 4.

[0034] Furthermore, a pressure detector is provided at the water inlet end of the flow control valve, and the pressure detector detects the water pressure inside the water inlet network pipe. The pressure detector is connected to the motor 31 by electrical signals, and the motor 31 can control the movement of the valve core 2 according to the water pressure inside the water inlet network pipe detected by the pressure detector, so that the flow control valve ensures the water inlet amount of the water tank, and keeps the water inlet noise in a small range to avoid affecting the user's rest. The water inlet network pipe refers to the water inlet pipe between the flow control valve and the water source.

[0035] In one embodiment, the speed regulator 33 is a pulse controller, which can output a pulse frequency to the motor 31 to control the speed of the motor 31. For example, the motor 31 is connected to a pulse generator, the motor 31 is a stepping motor, and the pulse generator controls the motor to work through pulses. The pulse controller can change the pulse frequency transmitted from the pulse generator to the motor 31 to change the speed of the motor 31. For another example, the pulse controller is a pulse encoder, and the speed of the motor 31 can be controlled by inputting a pulse frequency program into the pulse encoder. That is to say, in this embodiment, the pulse controller is equivalent to a control chip for controlling the operation of the motor 31.

[0036] In one embodiment, the speed regulating member 33 is a reducer, which connects the motor 31 and the valve core 2. When the motor 31 drives the valve core 2 to move, the power of the motor 31 is transmitted through the reducer, so that the valve core 2 moves at a slower speed, thereby avoiding water hammer when closing the flow regulating valve.

[0037] In one embodiment, if Figure 2As shown, the speed regulating member 33 is a frequency converter, which is electrically connected to the motor 31. The frequency converter controls the power frequency of the motor 31, thereby changing the rotation speed of the motor 31, so that the valve core 2 moves at a slower speed to avoid water hammer when closing the flow regulating valve.

[0038] In one embodiment, the speed regulating member 33 includes a reducer and a frequency converter, the reducer is connected to the motor 31 and the valve core 2, the frequency converter is electrically connected to the motor 31, the speed of the motor 31 is controlled by the frequency converter, and the speed of the motor 31 is further slowed down by the reducer, so that the valve core 2 moves at a slower speed to avoid water hammer when closing the flow regulating valve.

[0039] Specifically, the valve body 1 is provided with an inner cavity 11, a water inlet 12 and a first water outlet channel 13. The water inlet 12 and the first water outlet channel 13 are both connected to the inner cavity 11. The diameter of the first water outlet channel 13 is smaller than the diameter of the inner cavity 11. The diameter of the valve core 2 is equal to or greater than the diameter of the first water outlet channel 13. The valve core 2 is installed in the inner cavity 11. There is a gap between the circumferential outer surface of the valve core 2 and the inner wall surface of the inner cavity 11, so that water can pass through the circumferential outer surface of the valve core 2. When there is a distance between the valve core 2 and the first water outlet channel 13, water entering the inner cavity 11 from the water inlet 12 can enter the first water outlet channel 13 through the gap.

[0040] The valve core 2 can move toward or away from the first water outlet channel 13 to change the distance between the valve core 2 and the first water outlet channel 13, thereby changing the water outlet flow of the flow control valve. The valve core 2 can move to a position to block the first water outlet channel 13, thereby changing the cross-sectional area of ​​the water passage 4 to 0, that is, closing the flow control valve to control the on-off of the water inlet pipe, thereby eliminating the need to set up an additional water inlet valve.

[0041] In one embodiment, the driving mechanism 3 includes a transmission structure 32, which connects the motor 31 and the valve core 2, and the transmission structure 32 changes the angle variable of the motor 31 into the linear movement variable of the valve core 2, thereby driving the valve core 2 to move linearly. In other embodiments, the movement of the valve core 2 can also be a rotational movement, and the size of the water passage 4 can be changed by the rotational movement. This application takes the movement of the valve core 2 as a linear movement as an embodiment to further describe the structure of the flow control valve of the present application.

[0042] See also Figure 2 , Figure 6 and Figure 7In one embodiment, the transmission structure 32 includes an eccentric rotating member 321 and a push rod 322. The eccentric rotating member 321 is a cam or an eccentric wheel. The eccentric rotating member 321 is arranged on the rotating shaft of the motor 31. The push rod 322 is connected to the valve core 2 and the eccentric rotating member 321. When the motor 31 drives the eccentric rotating member 321 to rotate, the push rod 322 is pushed to move, and the push rod 322 drives the valve core 2 to move, so as to realize the opening and closing of the valve core 2 and the movement between the open state and the closed state.

[0043] In one embodiment, the push rod 322 abuts against the eccentric rotating member 321, so that the push rod 322 and the eccentric rotating member 321 form a cam structure; or the push rod 322 is rotationally connected to the valve core 2 and the eccentric rotating member 321, so that the eccentric rotating member 321, the push rod 322 and the valve core 2 form a crank structure.

[0044] In one embodiment, the transmission structure 32 further includes a lever 323, one end of which is rotatably connected to the valve body 1, and the other end is connected to the eccentric rotating member 321, and the push rod 322 is connected to the lever 323. When the motor 31 drives the eccentric rotating member 321 to rotate, the eccentric rotating member 321 pushes the lever 323 to swing, so that the lever 323 can push the push rod 322 to move, thereby realizing the movement of the valve core 2 to the open state, the closed state, and between the open state and the closed state.

[0045] In one embodiment, the lever 323 is connected to the valve body 1 through a rotating shaft, and the push rod 322 is connected to the middle of the lever 323, so that the distance between the connection point between the push rod 322 and the lever 323 and the rotating shaft is smaller than the distance between the connection point between the eccentric rotating member 321 and the lever 323 and the rotating shaft, thereby making the movement amplitude of the push rod 322 smaller than the movement stroke of the eccentric rotating member 321, that is, it has a deceleration effect on the valve core 2. Moreover, from the principle of the lever, it can be known that the transmission structure 32 of this embodiment can also reduce the power demand of the motor 31 and reduce energy consumption.

[0046] In one embodiment, the lever 323 is in contact with the push rod 322. When the eccentric rotating member 321 rotates forward, the lever 323 swings, thereby pushing the push rod 322 to move, so that the valve core 2 moves in a direction away from the first water outlet channel 13, thereby increasing the water passage 4. The transmission structure 32 further includes a first elastic member 324, which is connected between the valve body 1 and the valve core 2, and the elastic force of the first elastic member 324 can push the push rod 322 to contact the lever 323. When the eccentric rotating member 321 rotates in the reverse direction, the lever 323 no longer pushes the push rod 322, and the valve core 2 pushes the valve core 2 and the push rod 322 to reset under the elastic force of the first elastic member 324. That is to say, when the eccentric rotating member 321 rotates forward, the lever 323 pushes the valve core 2 to move, and the direction of movement of the valve core 2 is the direction of opening the flow regulating valve. At this time, the first elastic member 324 undergoes elastic deformation and stores elastic potential energy. When the eccentric rotating member 321 rotates reversely, the first elastic member 324 releases the elastic potential energy to drive the valve core 2 and the push rod 322 to move.

[0047] exist Figure 6 In the embodiment shown, when the first elastic member 324 pushes the valve core 2 to reset, the direction of the movement of the valve core 2 is the direction of closing the flow regulating valve. Therefore, when the motor 31 fails, the valve core 2 is pushed by the first elastic member 324 to close the flow regulating valve, thereby preventing the water tank from continuously entering the water tank and causing water to overflow from the water tank. Moreover, the lever 323 and the push rod 322 are in contact with each other, so when the motor 31 is replaced, the connection point between the lever 323 and the push rod 322 does not need to be disassembled, making replacement convenient.

[0048] In one embodiment, a first limit block 71 is provided on the rotating shaft of the eccentric rotating member 321 or the motor 31, and the first limit block 71 protrudes from the outer surface of the rotating shaft of the eccentric rotating member 321 or the motor 31, and the first limit block 71 follows the rotating shaft of the eccentric rotating member 321 or the motor 31. A second limit block 72 is provided on the valve body 1, and the second limit block 72 protrudes from the surface of the valve body 1. When the rotating shaft of the motor 31 rotates, the first limit block 71 can abut against the second limit block 72 to limit the rotation angle of the rotating shaft of the eccentric rotating member 321 or the motor 31, so that the motor 31 will not drive the valve core 2 to move to a position where it collides with the valve body 1, causing damage to the valve body 1 or the valve core 2.

[0049] In one embodiment, the distance that the valve core 2 moves in the inner cavity 11 is greater than or equal to the lift of the transmission structure 32. Therefore, even if the angle detector fails and causes the rotation angle of the motor 31 to be incorrect, the eccentric rotating member 321 will not push the valve core 2 to hit the valve body 1, thereby protecting the valve body 1 and the valve core 2, making it safer and reducing maintenance costs.

[0050] In one embodiment, the transmission structure 32 includes a gear and a rack. The gear is set on the rotating shaft of the motor 31, and the rack is fixed on the valve core 2 and meshes with the gear. When the motor 31 drives the gear to rotate, the rack moves, thereby driving the valve core 2 to move, thereby changing the angle variable of the motor 31 into the linear movement variable of the valve core 2, thereby driving the valve core 2 to move linearly.

[0051] Among them, the linear speed of the gear and the moving speed of the rack, as the linear speed is equal to the angular speed multiplied by the radius, can be known that by reducing the diameter of the gear, that is, reducing the number of teeth of the gear, the moving speed of the rack and the valve core 2 can be reduced. Alternatively, the gear includes a driving wheel and a driven wheel, the driving wheel is arranged on the rotating shaft of the motor 31, the driven wheel is meshed with the driving wheel and the rack, the diameter of the driven wheel is larger than the diameter of the driving wheel, so that a speed reduction structure is formed between the driven wheel and the driving wheel to reduce the moving speed of the valve core 2.

[0052] An air port is also provided on the valve body, and the air port is connected to at least one of the inner cavity and the first water outlet channel. The flow regulating valve also includes an anti-siphon valve, and the anti-siphon valve is arranged on the air port to control the opening and closing of the air port. When negative pressure appears in the water inlet pipe, the anti-siphon valve opens to allow external air to enter the water inlet pipe, so that the internal and external pressures of the water inlet pipe are balanced, and the water inside the water tank is prevented from flowing back.

[0053] In one embodiment, see Figure 4 and Figure 5 The air port includes a first installation port 14, and the first installation port 14 connects the outer surface of the valve body 1 and the first water outlet channel 13. The first anti-siphon valve 5 is installed on the first installation port 14. When negative pressure appears in the water inlet pipe and the valve core 2 is in the open position, the first anti-siphon valve 5 opens, allowing external air to enter the water inlet pipe to balance the internal pressure of the water inlet pipe and prevent the water inside the water tank from flowing back into the water inlet pipe. When there is water in the water inlet pipe, the first anti-siphon valve 5 is closed to prevent the water in the water inlet pipe from flowing out from the first installation port 14. Among them, when the valve core 2 is in the closed position, the first anti-siphon valve 5 will also open automatically, so that the water in the pipeline between the flow regulating valve and the water tank can automatically flow into the water tank when the flow regulating valve is in the closed state.

[0054] The position of the first anti-siphon valve 5 is higher than the liquid level in the water tank, so that when the first anti-siphon valve 5 is in an open state, the water in the water tank will not flow back to the first anti-siphon valve 5 .

[0055] In one embodiment, the first anti-siphon valve 5 includes a first stopper 51, a first valve cover 52 and a first blocking member 53. The first stopper 51 and the first valve cover 52 are arranged at intervals on the first installation port 14, and the first valve cover 52 is provided with a first vent. The first blocking member 53 is slidably connected between the first stopper 51 and the first valve cover 52. When there is water in the first water outlet channel 13, the first blocking member 53 moves toward the first valve cover 52 under the pressure of the water and blocks the first vent, so that the water in the first water outlet channel 13 will not be discharged from the first vent, and the external air cannot enter the first water outlet channel 13 from the first vent. When there is no water in the first water outlet channel 13, the first blocking member 53 leaves the position of blocking the first vent under the action of its own gravity, so that the first vent is connected to the first water outlet channel 13, and the external air enters the first water outlet channel 13 from the first vent. The first blocking member 53 can automatically move to a position to block the first vent under the action of water pressure, without the need for a driving mechanism 3 , thus making the structure simple, and can be quickly opened when there is no water in the first water outlet channel 13 .

[0056] In the above, the first limiter 51 can be formed together with the valve body 1; or the first limiter 51 is the valve body of the first anti-siphon valve 5, and the first limiter 51 is fixed to the valve body 1 by screws or buckles.

[0057] In one embodiment, see Figure 4 and Figure 6 The air port includes a second installation port 15, which communicates with the outer surface of the valve body 1 and the inner cavity 11, and a second anti-siphon valve 6 is installed on the second installation port 15. When negative pressure appears in the water inlet pipe and the valve core 2 is in the closed position, the second anti-siphon valve 6 opens, allowing external air to enter the water inlet pipe through the second anti-siphon valve 6, so as to balance the internal pressure of the water inlet pipe and prevent the water in the water tank from being sucked back. When there is water in the water inlet pipe, the second anti-siphon valve 6 is closed to prevent the water in the water inlet pipe from flowing out from the second installation port 15.

[0058] In one embodiment, the second anti-siphon valve 6 includes a second limiter 61, a second valve cover 62, and a second blocking member 63. The second limiter 61 and the second valve cover 62 are arranged at intervals on the second mounting port 15. The second valve cover 62 is provided with a second air inlet. The second blocking member 63 is arranged between the second limiter 61 and the second valve cover 62, and the second blocking member 63 can block the second air inlet on the second valve cover 62. When negative pressure occurs in the water inlet pipe, the second blocking member 63 can automatically open the second air inlet, and external air can enter the water inlet pipe through the second air inlet, so that the pressure inside the water inlet pipe is balanced. When negative pressure exists inside the water inlet pipe, the second blocking member 63 can automatically block the second air inlet.

[0059] The second anti-siphon valve 6 also includes a second elastic member 64, which is disposed between the second limit member 61 and the second blocking member 63, and the elasticity of the second elastic member 64 can push the second blocking member 63 to block the second air inlet on the second valve cover 62. When negative pressure appears in the water inlet pipe, and the negative pressure is greater than the elastic force of the second elastic member 64, the second elastic member 64 is elastically deformed to cause the second blocking member 63 to automatically open the second air inlet, and external air can enter the water inlet pipe through the second air inlet, so that the pressure inside the water inlet pipe is balanced.

[0060] When the motor 31 fails, the valve core 2 closes the flow regulating valve under the action of the first elastic member 324, and although the first air vent is connected to the outside, the outside air cannot enter the inner cavity 11. The present application sets a second anti-siphon valve 6, so that when the motor 31 fails, external air can enter the water inlet pipe and balance the internal pressure of the water inlet pipe.

[0061] In the above, the second limiter 61 can be formed together with the valve body 1; or the second limiter 61 is the valve body of the second anti-siphon valve 6, and the second limiter 61 is fixed to the valve body 1 by screws or buckles.

[0062] See also Figure 6 In one embodiment, the valve body 1 includes a main body 17, a first end cover 18 and a second end cover 19. The first installation port 14 and the second installation port 15 are both arranged on the main body 17. The main body 17 is also provided with a first cavity, a second cavity and a through hole. The first cavity and the second cavity are coaxially arranged, and the first cavity and the second cavity are connected to each other through the through hole. The valve core 2 is slidably connected in the first cavity and can approach or move away from the through hole. The gap between the valve core 2 and the through hole forms a water passage 4. When the valve core 2 fits the edge of the through hole, the flow regulating valve is closed, that is, the cross-sectional area of ​​the water passage 4 is 0. The end of the first cavity and the second cavity that are away from each other is open. The first end cover 18 is fixed at the open end of the first cavity so that the first cavity forms a closed inner cavity 11. The second water outlet channel 16 is arranged on the first end cover 18. The second end cover 19 is fixed to the open portion of the second cavity so that the second cavity forms a closed cavity. The valve body 1 is also provided with a channel communicating with the second cavity, and the channel and the second cavity form a first water outlet channel 13 .

[0063] Among them, see Figure 3, one of the main body 17 and the first end cover 18 is provided with a first protrusion 174, and the other is provided with a first groove 181. When the first end cover 18 is installed on the main body 17, the first protrusion 174 is located in the first groove 181. Therefore, by setting the first protrusion 174 and the first groove 181, the first end cover 18 and the main body 17 can be quickly aligned when they are installed, thereby improving the installation efficiency. Similarly, one of the main body 17 and the second end cover 19 is provided with a second protrusion 175, and the other is provided with a second groove 191. When the second end cover 19 is installed on the main body 17, the second protrusion 175 is located in the second groove 191. Therefore, by setting the second protrusion 175 and the second groove 191, the second end cover 19 and the main body 17 can be quickly aligned when they are installed, thereby improving the installation efficiency.

[0064] In one embodiment, see Figure 2 The second protrusion 175 is provided on the main body 17, and the second groove 191 is provided on the second end cover 19. The second valve cover 62 is provided with a third groove 621. When the second valve cover 62 is installed on the main body 17, the second protrusion 175 is also located in the third groove 621, so that when the second valve cover 62 and the main body 17 are installed, they can be quickly aligned, thereby improving the installation efficiency.

[0065] In the above, the first elastic member 324 and the second elastic member 64 are preferably compression springs. In other embodiments, the first elastic member 324 and the second elastic member 64 may also be disc springs, silicone sleeves, etc.

[0066] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. Flow control valve, characterized in that: include: A valve body, wherein the valve body is provided with an inner cavity, a water inlet and a first water outlet channel, and the water inlet and the first water outlet channel are both connected to the inner cavity; a valve core, movably connected in the inner cavity and capable of moving relative to the first water outlet channel to change the water outlet flow rate at the first water outlet channel; The driving mechanism includes a motor and a speed regulating component, wherein the motor is connected to the valve core and can control the movement of the valve core relative to the valve body, and the speed regulating component is connected to the motor and can slow down the movement speed of the valve core, so that when the flow regulating valve is closed, the water flow rate gradually decreases.

2. The flow control valve according to claim 1, characterized in that: The speed regulating component is a pulse controller, which can output a pulse frequency to the motor to control the rotation speed of the motor.

3. The flow control valve according to claim 1, characterized in that: The speed regulating member is a frequency converter, which is electrically connected to the motor and can change the power frequency of the motor to slow down the rotation speed of the motor; and / or The speed regulating member is a reducer, which connects the motor and the valve core and can slow down the rotation speed output by the motor.

4. The flow control valve according to claim 1, characterized in that: The driving mechanism comprises a transmission structure, and the transmission structure connects the motor and the valve core. When the rotating shaft of the motor rotates, it can drive the valve core to move linearly, so that the valve core is close to or away from the first water outlet channel.

5. The flow control valve according to claim 4, characterized in that: The transmission structure comprises an eccentric rotating member and a push rod. The eccentric rotating member is arranged on the rotating shaft of the motor. The push rod is connected to the valve core and the eccentric rotating member.

6. The flow control valve according to claim 5, characterized in that: The transmission structure further comprises a lever and a first elastic member, one end of the lever is rotatably connected to the valve body, and the other end is connected to the eccentric rotating member, and the push rod abuts against the middle of the lever; The first elastic member connects the valve body and the valve core, and the elastic force of the first elastic member can push the push rod to abut against the lever.

7. The flow control valve according to claim 4, characterized in that: The transmission structure comprises a gear and a rack, wherein the gear is arranged on the rotating shaft of the motor, and the rack is fixed on the valve core and meshes with the gear.

8. The flow control valve according to claim 1, characterized in that: The valve body is also provided with an air port, and the air port is connected to at least one of the inner cavity and the first water outlet channel; The flow regulating valve further comprises an anti-siphon valve, and the anti-siphon valve is arranged on the air port to control the opening and closing of the air port.

9. The flow control valve according to claim 8, characterized in that: The air port includes a first installation port and a second installation port, the first installation port is connected to the outer surface of the valve body and the first water outlet channel, and the second installation port is connected to the outer surface of the valve body and the inner cavity; The anti-siphon valve comprises a first anti-siphon valve and a second anti-siphon valve, wherein the first anti-siphon valve is installed on the first installation port, and the second anti-siphon valve is installed on the second installation port; The valve body is also provided with a second water outlet channel, the second water outlet channel is communicated with the inner cavity, and the second water outlet channel is used to be connected to an external spray gun.

10. A toilet, characterized in that: include: A water tank for storing cleaning water; A water inlet pipe, connected to the water tank and an external water source; The flow regulating valve according to any one of claims 1 to 9, connected to the water inlet pipe.

Images