A diaphragm type distribution valve

Abstract

The present invention relates to a diaphragm type distribution valve, comprising a shell, wherein the shell is provided with a raw water inlet, a pure water outlet, a pure water inlet and a pressure reducing outlet, a pressure reducing chamber for connecting the raw water inlet and the pressure reducing outlet, a pressure reducing valve assembly, a negative pressure chamber and a water outlet chamber, a reflux port, a first valve port for connecting the negative pressure chamber and the water outlet chamber, a negative pressure valve assembly, and a water overflow diaphragm in the water outlet chamber. By adopting the above scheme, it is possible to achieve pressurized reflux of pure water, the pressure of the pressurized reflux is lower than the pressure of the disconnection action of the pressure switch of the water purifier. In the process of pumping water, the water output can be guaranteed, and the excess pure water flows back to the water inlet end of the water purifier. When pumping water stops, the pure water pressure is used to close the reflux and stop the water purifier, and the reflux amount can be automatically adjusted to meet the use of water purifiers with different pure water fluxes.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply, in particular to a diaphragm type distribution valve. Background Art

[0002] The heating water supply system of a general tankless quick-heating pipeline machine includes a tankless quick-heating pipeline machine and a large-flow tankless pure water machine. The pure water flow rate of the large-flow tankless pure water machine is usually greater than 1L / min. Due to power limitations, the boiling water flow rate of the quick-heating pipeline machine is usually 350-400ml / min when discharging hot water. The shutdown action of the pure water machine is controlled by a pressure switch. Since the water supply is greater than the demand, the excess pure water has nowhere to overflow. Once the pressure at the water outlet of the pure water machine is higher than the pressure at which the pressure switch of the pure water machine disconnects, the pure water machine will be shut down. As the quick-heating pipeline machine continues to pump water, the pressure at the water outlet of the pure water machine is lower than the pressure at which the pressure switch of the pure water machine disconnects, and the pure water machine starts working again. This will cause the pure water machine to not work normally (frequent startup and shutdown).

[0003] Therefore, it is necessary to design a distribution valve, which can be used to connect the tankless fast-heating pipeline machine and the large-flow barrelless water purifier. During the water pumping process of the pipeline machine, the water purifier will supply water to the pipeline machine, and the excess pure water will flow back to the water inlet end of the water purifier. When the pipeline machine stops pumping water, the pure water pressure is used to close the reflux and stop the water purifier. Moreover, when water purifiers with different pure water fluxes are used with the same pipeline machine, the reflux volume can be automatically adjusted to avoid frequent startup and shutdown. Summary of the Invention

[0004] The present invention overcomes the shortcomings of the existing technology and provides a diaphragm distribution valve, which can maintain pressurized reflux of pure water. The pressure of the pressurized reflux is lower than the pressure at which the pressure switch of the pure water machine disconnects. During the water pumping process, the water output can be guaranteed, and the excess pure water flows back to the water inlet end of the pure water machine. When the water pumping stops, the pure water pressure is used to close the reflux and stop the pure water machine from working. The reflux volume can also be automatically adjusted to meet the use of pure water machines with different pure water fluxes.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a diaphragm type distributing valve, including a shell, the shell is provided with a raw water inlet connected to the tap water, a pure water outlet connected to the pipeline machine, a pure water inlet connected to the water outlet end of the pure water machine and a pressure reducing outlet connected to the water inlet end of the pure water machine, a pressure reducing chamber for connecting the raw water inlet and the pressure reducing outlet is provided in the shell, and also includes a pressure reducing valve assembly, the pressure reducing valve assembly is normally open to conduct the raw water inlet and the pressure reducing chamber, the pressure reducing valve assembly can gradually reduce or cut off the water supply from the raw water inlet to the pressure reducing chamber, a negative pressure chamber connected to the pure water outlet and a water outlet chamber connected to the pure water inlet are provided in the shell, a reflux port for connecting the water outlet chamber and the pressure reducing chamber is provided in the shell, a one-way valve assembly for limiting the flow of tap water from the pressure reducing chamber to the water outlet chamber is provided at the reflux port, a first valve port for connecting the negative pressure chamber and the water outlet chamber is provided in the shell, and also includes a negative pressure valve assembly, a negative pressure valve The component is normally closed to close the first valve port. When the pure water outlet absorbs water under negative pressure, the negative pressure valve component opens the first valve port. The shell is provided with an overflow diaphragm in the water outlet chamber, and the overflow diaphragm can separate the water outlet chamber into a first water outlet chamber and a second water outlet chamber. The first water outlet chamber is connected to the first valve port, and the second water outlet chamber is connected to the reflux port and the pure water inlet respectively. A first water hole is provided on the overflow diaphragm for connecting the first water outlet chamber and the second water outlet chamber. When there is no negative pressure absorption of water at the pure water outlet, the overflow diaphragm blocks the reflux port; when the pure water outlet absorbs water under negative pressure, the pressure in the first water outlet chamber decreases, and the overflow diaphragm telescopes and moves away from the reflux port under the action of water pressure, opening the reflux port; when the water inlet flow rate of the pure water inlet increases, the overflow diaphragm moves away from the reflux port under the action of pressure, the opening of the reflux port increases, and the reflux amount increases; when the water inlet flow rate of the pure water inlet decreases, the overflow diaphragm approaches the reflux port under the action of pressure, the opening of the reflux port decreases, and the reflux amount decreases.

[0006] By adopting the above solution, the setting of the pressure reducing valve assembly can make the water pressure at the water inlet end of the water purifier lower than the shutdown pressure of the water purifier, making the pure water return smoother.

[0007] 1. When there is water pressure in the second water outlet chamber and no negative pressure in the negative pressure chamber, the negative pressure valve assembly closes the first valve port, and water flows through the first water hole to balance the pressure in the second water outlet chamber and the first water outlet chamber. The pressure area of ​​the overflow diaphragm close to the first water outlet chamber is larger than the pressure area of ​​the overflow diaphragm close to the second water outlet chamber. The overflow diaphragm blocks the reflux port, and the water purifier is in standby mode. Due to the presence of the one-way valve assembly, tap water cannot enter the second water outlet chamber.

[0008] 2. When negative pressure appears in the negative pressure chamber (external pipeline machine pumps water), the negative pressure valve assembly opens the first valve port, and the water in the first water outlet chamber flows out through the first valve port, the pressure is reduced, and the pressure in the second water outlet chamber is greater than the pressure in the first water outlet chamber. Under the action of pressure, the overflow diaphragm moves away from the reflux port, opening the reflux port. At this time, the pressure in the second water outlet chamber is reduced, and the pure water machine starts water production. Pure water flows into the first water outlet chamber through the first water hole and flows out from the pure water outlet through the first valve port; when the pure water supply is greater than the pumping capacity of the pipeline machine, the excess water flows back to the pressure reducing chamber through the reflux port, and is mixed with tap water and then sucked away from the pressure reducing outlet by the pure water machine. During reflux, the water pressure in the second water outlet chamber is lower than the pressure at which the pressure switch of the pure water machine disconnects, and the pure water machine will not shut down.

[0009] 3. When the pipeline pump pumps more water, the opening of the negative pressure valve assembly to the first valve port becomes larger, and the pressure in the first water outlet chamber is lower than that in the second water outlet chamber. Since the first water hole has a certain resistance, the overflow diaphragm moves away from the return port. At this time, although the opening of the return port increases, the pressure relief outlet has a certain pressure, and the pure water refluxes less or even does not reflux;

[0010] Fourth, when the pipeline machine pumps less water, the opening of the negative pressure valve assembly to the first valve port becomes smaller, the pressure in the first water outlet chamber rises, and the overflow diaphragm automatically moves toward the return port. At this time, the return port is still open, and excess water can flow back to the pressure reducing chamber through the return port.

[0011] 5. When the external pipeline machine stops pumping water, there is no negative pressure in the negative pressure chamber, the negative pressure valve assembly closes the first valve port, the pressure in the first water outlet chamber increases, the overflow diaphragm automatically moves toward the direction of the return port, and closes the return port. The pressure in the second water outlet chamber continues to rise to the pressure at which the water purifier pressure switch disconnects, and the water purifier stops working;

[0012] 6. When water purifiers with different pure water fluxes are used in conjunction with the same pipeline machine, since the water output of the pipeline machine is constant, when a water purifier with a large pure water flux is used, the water flow rate of the pure water inlet increases, the overflow diaphragm moves away from the reflux port under the action of pressure, the opening of the reflux port increases, and the reflux volume increases; when a water purifier with a small pure water flux is used, the water flow rate of the pure water inlet decreases, the overflow diaphragm moves close to the reflux port under the action of pressure, the opening of the reflux port decreases, and the reflux volume decreases, and the reflux volume can be automatically adjusted;

[0013] 7. When the water pump of a single pipeline machine is pumping water, the opening of the return port is sufficient to allow excess pure water to flow back. The water pressure in the second water outlet chamber is lower than the pressure at which the pressure switch of the water purifier disconnects, and the water purifier will not shut down.

[0014] It can maintain pressurized reflux of pure water, and the pressure of the pressurized reflux is lower than the pressure at which the pressure switch of the water purifier disconnects. During the water pumping process, the water output can be guaranteed, and the excess pure water flows back to the water inlet end of the water purifier. When the water pumping stops, the pure water pressure is used to close the reflux and stop the water purifier. It can also automatically adjust the reflux volume to meet the use of water purifiers with different pure water fluxes.

[0015] A further configuration of the present invention is: it also includes a rectifying component that can adjust the water flow rate of the first water hole, the rectifying component includes a rectifying column, the rectifying column is fixedly arranged in the water outlet chamber, the end of the rectifying column is inserted into the first water hole, and the outer wall of the rectifying column and the inner wall of the first water hole form a first water channel. As the negative pressure water absorption flow of the pure water outlet increases, the pressure difference between the first water outlet chamber and the second water outlet chamber becomes larger, the overflow diaphragm gradually moves away from the return port, the water flow rate of the first water hole gradually increases, and the water output increases.

[0016] By adopting the above scheme, the diameter of the first water hole determines the amount of water flowing through it. When the overflow diaphragm gradually moves away from the return port, the rectifying column gradually leaves the first water hole, and the diameter of the first water hole gradually increases, thereby gradually increasing the water flow through the first water hole; when the overflow diaphragm gradually approaches the return port, the rectifying column gradually inserts into the first water hole, and the diameter of the first water hole gradually decreases, thereby gradually decreasing the water flow through the first water hole. During the process of pumping water by the pipeline machine, the water output will be automatically adjusted according to the pumping amount.

[0017] 1. The amount of water flowing through the negative pressure chamber is determined by the pump of the pipeline machine. The more water is pumped, the wider the opening of the negative pressure valve assembly to the first valve port becomes. Under the action of pressure, the overflow diaphragm moves away from the return port, and the diameter of the first water hole becomes larger, thereby increasing the water flow rate of the first water hole, and the overflow diaphragm reaches a balanced state. At this time, although the opening of the return port increases, the pressure relief outlet has a certain pressure, and the pure water reflux is small or even non-existent.

[0018] Second, when the water pump of the pipeline machine pumps less water, the opening of the negative pressure valve assembly to the first valve port becomes smaller, the pressure in the first water outlet chamber rises, the overflow diaphragm automatically moves closer to the return port, the diameter of the first water hole becomes smaller, thereby reducing the water flow rate of the first water hole, the overflow diaphragm reaches a balanced state, and the return port is still in the open state at this time, and the excess water flows back to the pressure reducing chamber through the return port;

[0019] 3. The pure water outlet is connected to multiple pipeline machines. When the water pumps of multiple pipeline machines are pumping water, as the opening of the first valve port increases, the overflow diaphragm automatically expands and contracts in the direction away from the return port, and the diameter of the first water hole gradually increases, thereby increasing the water flow rate of the first water hole. The opening of the return port increases, and the pressure after the pressure reducing valve assembly is reduced exists. The pressure of the second water outlet chamber drops, and the backflow automatically reduces or even stops, thereby meeting the operating conditions of one to multiple pipeline machines.

[0020] A further configuration of the present invention is that an overflow skeleton is fixedly connected to the overflow diaphragm, the overflow skeleton is located on the side of the overflow diaphragm away from the return port, and a convex column is extended toward the side of the overflow diaphragm by the overflow skeleton, the convex column penetrates the overflow diaphragm, and the first water hole is opened on the convex column, and the aperture of the first water hole gradually increases from the end away from the rectifying column to the end close to the rectifying column.

[0021] By adopting the above solution, the overflow diaphragm is snap-fitted with the overflow frame. Since the aperture of the first water hole gradually increases from the end away from the rectifying column to the end close to the rectifying column, when the overflow diaphragm is telescopically moved in the direction away from the return port, the first water passage is enlarged, the amount of water passing through is increased, the structure is simple, and the design is reasonable.

[0022] A further configuration of the present invention is that: the housing is fixedly provided with a rectifier plate at the second water outlet chamber, the rectifier column is fixed or integrally provided on the rectifier plate, and the rectifier plate is provided with a second water hole for water to flow through.

[0023] By adopting the above solution, a plurality of first water holes can be provided on the overflow membrane, and a plurality of rectifying columns are provided on the corresponding rectifying plates. The rectifying plates will not affect the flow of water, and the structure is simple and the design is reasonable.

[0024] A further arrangement of the present invention is that the negative pressure valve assembly includes a first valve plug, a first elastic member and an air pressure diaphragm, the first valve plug is located on the side of the first valve port close to the water outlet chamber, the first elastic member drives the first valve plug to seal the first valve port, the air pressure diaphragm is installed in the negative pressure chamber, the air pressure diaphragm separates the negative pressure chamber into a first negative pressure chamber and a second negative pressure chamber, the first negative pressure chamber is connected to the external air, and the second negative pressure chamber is connected to the pure water outlet, the air pressure diaphragm can extend and retract in the direction close to the first valve port and drive the first valve plug to move through the upper top structure, thereby opening the first valve port to realize direct connection between the second negative pressure chamber and the first water outlet chamber, the air pressure diaphragm drives the movement distance of the first valve plug to change according to the change of the external negative pressure water absorption flow, thereby controlling the water output.

[0025] By adopting the above scheme, when the pure water outlet is acted upon by the water pump of the pipeline machine, the second negative pressure chamber generates negative pressure, and the first negative pressure chamber is at atmospheric pressure. Therefore, the air pressure diaphragm will expand and contract and move toward the direction close to the first valve port. At this time, the first valve plug can be pushed open by the upper top structure, thereby opening the first valve port. At this time, the second negative pressure chamber and the first water outlet chamber are directly connected to realize water outlet, and the air pressure diaphragm drives the movement distance of the first valve plug to change according to the change of the external negative pressure water absorption flow rate, thereby controlling the water output; when the water pump of the pipeline machine stops working, the air pressure diaphragm will expand and contract and reset in the direction away from the first valve port, and the first valve plug will block the first valve port under the drive of the first elastic member, and the flow rate is determined by the flux of the external water pump.

[0026] A further arrangement of the present invention is that: the upper push structure includes a push pin, which is arranged on the air pressure diaphragm, and the end of the push pin can extend into the first valve port, and a second water passage for water to flow through is arranged between the end of the push pin and the inner wall of the first valve port, and the push pin can push the first valve plug away from the first valve port as the air pressure diaphragm moves, thereby opening the first valve port, and a first movable chamber for the first valve plug to move is provided in the outer shell, and a first spring seat is fixedly provided at an end of the first movable chamber away from the first valve port, and a third water passage hole is provided on the first spring seat, and the first elastic member is a first spring, which is placed in the first movable chamber, and one end of the first spring is abutted against the first spring seat, and the other end of the first spring is abutted against the first valve plug.

[0027] By adopting the above solution, the ejector pin is placed on the air pressure diaphragm through the chassis. The ejector pin and the chassis are arranged as one body or separately. The chassis can be placed on the end surface of the air pressure diaphragm or fixedly connected to the air pressure diaphragm. The ejector pin corresponds to the center of the air pressure diaphragm. The air pressure diaphragm will telescope and move in the direction close to the first valve port, which can drive the ejector pin to move. The end of the ejector pin presses and pushes open the first valve plug, thereby opening the first valve port. At this time, water can flow through the second water passage to allow pure water to flow out of the outlet; the air pressure diaphragm will drive the ejector pin to move and reset in the direction away from the first valve port, and the first valve plug can move along the guide of the first movable cavity. The first spring is stably installed, and the first spring seat will not affect the flow of water. The structure is simple and the design is reasonable.

[0028] A further configuration of the present invention is: it also includes a return spring, which is placed at the first water outlet chamber, one end of the return spring is against the inner wall of the first water outlet chamber, and the other end of the return spring is against the overflow frame. The return spring can drive the overflow diaphragm to telescope and move toward the side close to the return port.

[0029] By adopting the above solution, the return spring plays the role of assisting the return of the overflow diaphragm, and the installation is stable and the design is reasonable.

[0030] A further configuration of the present invention is that the one-way valve assembly includes a second valve plug and a second spring, a second active chamber for connecting the reflux port and the pressure reducing chamber is provided in the outer shell, the second valve plug is movably provided in the second active chamber, the second spring drives the second valve plug to block the reflux port, a second spring seat is fixedly provided at the end of the second active chamber away from the reflux port, a fourth water hole is provided on the second spring seat, the second spring is placed in the second active chamber, one end of the second spring is abutted against the second spring seat, and the other end of the second spring is abutted against the second valve plug.

[0031] By adopting the above solution, the second spring can drive the second valve plug to block the reflux port, and the water flow can only flow from the second water outlet chamber to the pressure reducing chamber, and cannot flow from the pressure reducing chamber to the second water outlet chamber, thereby achieving one-way conduction and preventing tap water from mixing into pure water.

[0032] A further arrangement of the present invention is that the pressure reducing valve assembly includes a pressure reducing bracket, a third valve plug, a pressure reducing diaphragm and a third spring; the pressure reducing bracket is mounted on the outer shell through the pressure reducing diaphragm; the third valve plug is fixedly arranged on the pressure reducing bracket; the pressure reducing bracket is provided with a fifth water hole around the third valve plug; a second valve port for connecting the pressure reducing chamber and the raw water inlet is provided in the outer shell; the third spring can drive the pressure reducing bracket to move away from the second valve port; when the pressure in the pressure reducing chamber increases, the pressure reducing bracket can drive the third valve plug to move toward the second valve port, thereby gradually reducing or cutting off the water supply from the raw water inlet to the pressure reducing chamber.

[0033] By adopting the above scheme, since the pressure-reducing diaphragm can undergo elastic deformation, the raw water inlet and the reflux outlet converge together through the pressure-reducing chamber to supply water to the pressure-reducing outlet. When the water supply pressure is greater than the required water supply pressure of the pressure-reducing outlet, the pressure-reducing bracket drives the third valve plug to move toward the second valve port to gradually reduce the water supply from the raw water inlet to the pressure-reducing chamber until the water supply pressure is the same as the required water supply pressure of the pressure-reducing outlet.

[0034] A further configuration of the present invention is: an installation cavity for installing a third spring is provided in the shell, the installation cavity is communicated with the external air, one end of the third spring is abutted against the pressure reducing bracket, and the other end of the third spring is abutted against the inner wall of the installation cavity, a guide column is provided on the shell, the guide column is located in the installation cavity, the pressure reducing bracket slides around the guide column, and the pressure reducing bracket and the guide column are sealed together.

[0035] By adopting the above solution, the decompression bracket and the guide column are sealed and cooperated through the sealing ring, which not only plays a sealing role but also does not affect the movement of the decompression bracket. The structure is simple and the design is reasonable.

[0036] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1Schematic diagram of the overall structure of an embodiment of the present invention;

[0038] Figure 2 1 is a schematic diagram of a first cross-sectional structure of an embodiment of the present invention;

[0039] Figure 3 2 is a schematic diagram of a second cross-sectional structure of an embodiment of the present invention;

[0040] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0041] Figure 5 It is a structural diagram of the rectifier plate;

[0042] Figure 6 Schematic diagram of the structure of the first valve plug, the first spring and the first spring seat;

[0043] Figure 7 Schematic diagram of the structure of the second valve plug, the second spring and the first spring seat;

[0044] Figure 8 Schematic diagram of the closed state;

[0045] Figure 9 This is a schematic diagram of the pumping status of a single water pump;

[0046] Figure 10 This is a schematic diagram of the pumping status of two water pumps;

[0047] Figure 11 This is a schematic diagram of the pumping status of multiple water pumps;

[0048] Figure 12 Schematic diagram of the usage scenario of the distribution valve. DETAILED DESCRIPTION

[0049] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0050] like Figures 1-12As shown, a diaphragm type distributing valve includes a shell 1, which is provided with a raw water inlet 11 connected to tap water, a pure water outlet 12 connected to a pipeline machine, a pure water inlet 13 connected to the water outlet of the pure water machine, and a pressure reducing outlet 14 connected to the water inlet of the pure water machine. A pressure reducing chamber 15 for connecting the raw water inlet 11 and the pressure reducing outlet 14 is provided in the shell 1, and also includes a pressure reducing valve assembly. The pressure reducing valve assembly is normally open to conduct the raw water inlet 11 and the pressure reducing chamber 15. The pressure reducing valve assembly can gradually reduce or cut off the water supply from the raw water inlet 11 to the pressure reducing chamber 15. The shell 1 is provided with a negative pressure chamber connected to the pure water outlet 12 and a water outlet chamber connected to the pure water inlet 13. The shell 1 is provided with a reflux port 18 for connecting the water outlet chamber and the decompression chamber 15. The shell 1 is provided with a one-way valve assembly at the reflux port 18 to limit the flow of tap water from the decompression chamber 15 to the water outlet chamber. The shell 1 is provided with a first valve port 19 for connecting the negative pressure chamber and the water outlet chamber, and also includes a negative pressure valve assembly. The negative pressure valve assembly is normally closed to close the first valve port 19. When the pure water outlet 12 absorbs water under negative pressure, the negative pressure valve assembly opens the first valve port 19. The shell 1 is in An overflow diaphragm 21 is provided in the water outlet cavity. The edge sealing portion of the overflow diaphragm 21 can adopt radial interference sealing or axial compression sealing. The overflow diaphragm 21 can separate the water outlet cavity into a first water outlet cavity 171 and a second water outlet cavity 172. The first water outlet cavity 171 is connected to the first valve port 19, and the second water outlet cavity 172 is connected to the return port 18 and the pure water inlet 13 respectively. A first water hole 2411 for connecting the first water outlet cavity 171 and the second water outlet cavity 172 is provided on the overflow diaphragm 21. When the pure water outlet 12 has no negative pressure to absorb water, the overflow diaphragm 21 blocks the reflux port 18; when the pure water outlet 12 absorbs water under negative pressure, the pressure of the first water outlet chamber 171 decreases, and the overflow diaphragm 21 moves away from the reflux port 18 under the action of water pressure, thereby opening the reflux port 18; when the water inlet flow rate of the pure water inlet 12 increases, the overflow diaphragm 21 moves away from the reflux port 18 under the action of pressure, the opening of the reflux port 18 increases, and the reflux amount increases; when the water inlet flow rate of the pure water inlet 12 decreases, the overflow diaphragm 21 moves close to the reflux port 18 under the action of pressure, the opening of the reflux port 18 decreases, and the reflux amount decreases.

[0051] In this embodiment, a rectifying component capable of adjusting the water flow rate of the first water hole 2411 is also included. The rectifying component includes a rectifying column 221. The rectifying column 221 is fixedly arranged in the water outlet cavity. The end of the rectifying column 221 is inserted into the first water hole 2411. The outer wall of the rectifying column 221 and the inner wall of the first water hole 2411 form a first water passage 2412. As the negative pressure water absorption flow of the pure water outlet 12 increases, the pressure difference between the first water outlet cavity 171 and the second water outlet cavity 172 increases, the overflow membrane 21 gradually moves away from the return port, and the water flow rate of the first water hole 2411 gradually increases, thereby increasing the water output.

[0052] In this embodiment, an overflow skeleton 24 is fixedly connected to the overflow diaphragm 21, and the fixing method can be snap-on or plug-in. The overflow skeleton 24 is located on the side of the overflow diaphragm 21 away from the return port 18. The overflow skeleton 24 is provided with a boss 241 extending toward the side of the overflow diaphragm 21. The boss 241 penetrates the overflow diaphragm 21, and a first water hole 2411 is opened on the boss 241. The aperture of the first water hole 2411 gradually increases from the end away from the rectifying column 221 to the end close to the rectifying column 221.

[0053] In this embodiment, the housing 1 is fixedly provided with a rectifying plate 22 at the second water outlet chamber 172. A rectifying column 221 is fixedly or integrally provided on the rectifying plate 22. The rectifying plate 22 is provided with a second water passage 222 through which water flows. Of course, multiple first water passages may be provided, with multiple rectifying columns provided on the rectifying plate corresponding thereto. Of course, the rectifying column 221 may also be directly fixed or integrally provided on the housing 1.

[0054] In this embodiment, the negative pressure valve assembly includes a first valve plug 31, a first elastic member and an air pressure diaphragm 33. The first valve plug 31 is located on the side of the first valve port 19 close to the water outlet chamber. The first elastic member drives the first valve plug 31 to block the first valve port 19. The air pressure diaphragm 33 is installed in the negative pressure chamber. The edge sealing part of the air pressure diaphragm 33 can adopt radial interference sealing or axial compression sealing. The air pressure diaphragm 33 divides the negative pressure chamber into a first negative pressure chamber 161 and a second negative pressure chamber 162. The first negative pressure chamber 161 is connected to the external air through the first air vent 101, and the second negative pressure chamber 162 is connected to the pure water outlet 12. The air pressure diaphragm 33 can telescope in the direction close to the first valve port 19 and drive the first valve plug 31 to move through the upper top structure, thereby opening the first valve port 19 to realize direct connection between the second negative pressure chamber 162 and the first water outlet chamber 171. The air pressure diaphragm 33 drives the movement distance of the first valve plug 31 to change according to the change of the external negative pressure water absorption flow, thereby controlling the water output.

[0055] In this embodiment, the upper push structure includes a pin 34, which is arranged on the air pressure diaphragm. The pin 34 is placed on the air pressure diaphragm 33 through the chassis. The pin 34 and the chassis are integral or separate. The chassis can be placed on the end surface of the air pressure diaphragm 33, or can be fixedly connected to the air pressure diaphragm 33. The pin 34 corresponds to the center of the air pressure diaphragm 33, and the end of the pin 34 can extend into the first valve port 19. A second water passage 102 for water to flow through is provided between the end of the pin 34 and the inner wall of the first valve port 19. The pin 34 moves with the air pressure diaphragm 33 to push the first valve plug 31 away from the first valve port 19, thereby opening the first valve port 19.

[0056] In this embodiment, a first movable chamber 103 for the movement of the first valve plug 31 is provided in the housing 1. A first spring seat 35 is fixedly provided at the end of the first movable chamber 103 away from the first valve port 19. A third water passage hole 351 is provided on the first spring seat 35. The first elastic member is a first spring 32. The first spring 32 is placed in the first movable chamber 103. One end of the first spring 32 is abutted against the first spring seat 35, and the other end of the first spring 32 is abutted against the first valve plug 31.

[0057] In this embodiment, a return spring 23 is further included. The return spring 23 is positioned in the first water outlet chamber 171. One end of the return spring 23 abuts against the inner wall of the first water outlet chamber 171, and the other end of the return spring 23 abuts against the overflow frame 24. The return spring 23 can drive the overflow diaphragm 21 to telescopically move toward the side closer to the return port 18. Of course, the return spring can also be omitted. The overflow diaphragm is already in a deformed state during assembly, and the force of the overflow diaphragm's deformation and return can drive the overflow diaphragm to telescopically move toward the return port.

[0058] In this embodiment, the one-way valve assembly includes a second valve plug 41 and a second spring 42. A second active chamber 104 for connecting the reflux port 18 and the pressure reducing chamber 15 is provided in the housing 1. The second valve plug 41 is movably provided in the second active chamber 104. The second spring 42 drives the second valve plug 41 to block the reflux port 18. The second active chamber 104 is fixedly provided with a second spring seat 43 at one end away from the reflux port 18. A fourth water hole 431 is provided on the second spring seat 43. The second spring 42 is placed in the second active chamber 104. One end of the second spring 42 is abutted against the second spring seat 43, and the other end of the second spring 42 is abutted against the second valve plug 41.

[0059] In this embodiment, the pressure reducing valve assembly includes a pressure reducing bracket 51, a third valve plug 52, a pressure reducing diaphragm 53 and a third spring 54. The pressure reducing bracket 51 is installed on the housing 1 through the pressure reducing diaphragm 53. The edge sealing portion of the pressure reducing diaphragm 53 can adopt radial interference sealing or axial compression sealing. The third valve plug 52 is fixedly set on the pressure reducing bracket 51. The pressure reducing bracket 51 is provided with a fifth water hole 511 around the third valve plug 52. A second valve port 105 for connecting the pressure reducing chamber 15 and the raw water inlet 11 is provided in the housing 1. The third spring 54 can drive the pressure reducing bracket 51 to move away from the second valve port 105. When the pressure in the pressure reducing chamber 15 increases, the pressure reducing bracket 51 can drive the third valve plug 52 to move toward the second valve port 105, thereby gradually reducing or cutting off the water supply from the raw water inlet 11 to the pressure reducing chamber 15.

[0060] In this embodiment, an installation cavity 106 for installing the third spring 54 is provided in the housing 1, and the installation cavity 106 is connected to the external air through the second vent hole 107. One end of the third spring 54 is abutted on the pressure reducing bracket 51, and the other end of the third spring 54 is abutted on the inner wall of the installation cavity 106. A guide column 108 is provided on the housing 1, and the guide column 108 is located in the installation cavity 106. The pressure reducing bracket 51 slides outside the guide column 108, and the pressure reducing bracket 51 and the guide column 108 are sealed by the sealing ring 6.

[0061] Working principle:

[0062] 1. When there is water pressure in the second water outlet chamber 172 and no negative pressure in the second negative pressure chamber 162, the first valve plug 31 blocks the first valve port 19, and water flows through the first water hole 2411 to balance the pressure in the second water outlet chamber 172 and the first water outlet chamber 171. The pressure area of ​​the overflow diaphragm 21 close to the first water outlet chamber 171 is larger than the pressure area of ​​the overflow diaphragm 21 close to the second water outlet chamber 172. The overflow diaphragm 21 blocks the reflux port 18, and the water purifier is in standby mode. Due to the presence of the one-way valve assembly, tap water cannot enter the second water outlet chamber 172.

[0063] 2. When negative pressure appears in the second negative pressure chamber 162 (external pipeline machine pumps water), the air pressure diaphragm 21 will drive the ejector pin 34 to push open the first valve plug 31, and the water in the first water outlet chamber 171 will flow out through the first valve port 19, and the pressure will decrease. The pressure in the second water outlet chamber 172 will be greater than the pressure in the first water outlet chamber 171. Under the action of pressure, the overflow diaphragm 21 will move away from the return port 18, opening the return port 18. At this time, the pressure in the second water outlet chamber 172 will decrease, and the water purifier will start to make water. During operation, pure water flows into the first water outlet chamber 171 through the first water hole 2411, then flows into the second negative pressure chamber 162 through the first valve port 19, and flows out from the pure water outlet 12. When the pure water supply is greater than the water pumped by the pipeline machine, the excess water flows back to the decompression chamber 15 through the reflux port 18, mixes with the tap water, and is sucked away by the water purifier from the decompression outlet 14. During the reflux, the water pressure in the second water outlet chamber 172 is lower than the pressure at which the pressure switch of the water purifier disconnects, and the water purifier does not shut down.

[0064] Third, the amount of water flowing into the second negative pressure chamber 162 is determined by the pipeline machine's water pump. As more water is pumped, the distance the ejector pin 34 moves increases, widening the opening of the first valve plug 31. The pressure in the first water outlet chamber 171 becomes lower than the pressure in the second water outlet chamber 172. Because the first water hole 2411 has a certain resistance, the overflow diaphragm 21 moves away from the return port 18, increasing the diameter of the first water hole 2411 and the pure water flow rate, automatically reaching equilibrium. At this point, although the return port 18 is widened, the pressure at the pressure-reducing outlet 14 remains constant, resulting in little or no pure water backflow.

[0065] Fourth, when the water pump of the pipeline machine pumps less water, the distance moved by the ejector pin 34 decreases, the opening of the first valve plug 31 decreases, the pressure in the first water outlet chamber 171 increases, and the overflow diaphragm 21 automatically moves toward the direction close to the return port 18. The diameter of the first water through hole 2411 becomes smaller, and the amount of pure water passing through the first water through hole 2411 decreases. The overflow diaphragm 21 reaches a balanced state. At this time, the return port 18 is still in the open state, and the excess water flows back to the decompression chamber 15 through the return port 18. The water pressure in the second water outlet chamber 172 is lower than the pressure at which the pressure switch of the water purifier is disconnected, and the water purifier will not shut down.

[0066] 5. When the external pipeline machine stops pumping water, the second negative pressure chamber 162 has no negative pressure. The first valve plug 31 closes the first valve port 19 under the action of the first spring 32, and the pressure in the first water outlet chamber 171 increases. The overflow diaphragm 21 automatically moves toward the return port 18 and closes the return port 18. The pressure in the second water outlet chamber 172 continues to rise to the pressure at which the water purifier pressure switch disconnects, and the water purifier stops working.

[0067] 6. When a single water pump is pumping water, the opening of the return port 18 is sufficient to allow excess pure water to flow back, and the water pressure in the second water outlet chamber 172 is lower than the pressure at which the pressure switch of the pure water machine disconnects, so the pure water machine will not shut down; when multiple water pumps are pumping water, the opening of the return port 18 increases, and the pressure after the pressure reducing valve assembly reduces the pressure exists. The pressure in the second water outlet chamber 172 drops, and the backflow automatically decreases or even stops; as the opening of the first valve port 19 increases, the overflow diaphragm 21 automatically expands and contracts in the direction away from the return port 18, and the diameter of the first water hole 2411 gradually increases, meeting the operating conditions of one-to-many pipeline machines.

[0068] The above embodiments are only preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A diaphragm distributing valve according to claim 1, wherein the housing is provided with a raw water inlet connected to the tap water, a pure water outlet connected to the pipeline machine, a pure water inlet connected to the water outlet end of the pure water machine and a reduced-pressure outlet connected to the water inlet end of the pure water machine, wherein the housing is provided with a pressure reducing chamber for connecting the raw water inlet and the reduced-pressure outlet, and further comprising a pressure reducing valve assembly, wherein the pressure reducing valve assembly is normally open to conduct the raw water inlet and the pressure reducing chamber, and the pressure reducing valve assembly can gradually reduce or cut off the water supply from the raw water inlet to the pressure reducing chamber, wherein the housing is provided with a negative pressure chamber connected to the pure water outlet and a water outlet chamber connected to the pure water inlet, a reflux port for communicating the water outlet chamber and the pressure reducing chamber, the housing is provided with a one-way valve assembly at the reflux port to restrict tap water from flowing from the pressure reducing chamber to the water outlet chamber, the housing is provided with a first valve port for communicating the negative pressure chamber and the water outlet chamber, and further comprising a negative pressure valve assembly, the negative pressure valve assembly is normally closed to close the first valve port, and when the pure water outlet negatively absorbs water, the negative pressure valve assembly opens the first valve port, and is characterized in that: The outer shell is provided with an overflow diaphragm in the water outlet chamber, and the overflow diaphragm can divide the water outlet chamber into a first water outlet chamber and a second water outlet chamber, the first water outlet chamber is connected to the first valve port, and the second water outlet chamber is connected to the reflux port and the pure water inlet respectively, and a first water hole is provided on the overflow diaphragm for connecting the first water outlet chamber and the second water outlet chamber. When the pure water outlet has no negative pressure to absorb water, the pressure area of ​​the overflow diaphragm close to the first water outlet chamber is greater than the pressure area of ​​the overflow diaphragm close to the second water outlet chamber, and the overflow diaphragm blocks the reflux port; when the pure water outlet absorbs water under negative pressure, the pressure in the first water outlet chamber decreases, and the overflow diaphragm moves in a direction away from the reflux port under the action of water pressure, thereby opening the reflux port; when the water inlet flow rate of the pure water inlet increases, the overflow diaphragm moves away from the reflux port under the action of pressure, the opening of the reflux port increases, and the reflux amount increases; when the water inlet flow rate of the pure water inlet decreases, the overflow diaphragm moves close to the reflux port under the action of pressure, the opening of the reflux port decreases, and the reflux amount decreases.

2. A diaphragm type dispensing valve according to claim 1, characterized in that: It also includes a rectifying component that can adjust the water flow rate of the first water hole. The rectifying component includes a rectifying column. The rectifying column is fixedly arranged in the water outlet cavity. The end of the rectifying column is inserted into the first water hole. The outer wall of the rectifying column and the inner wall of the first water hole form a first water channel. As the negative pressure water absorption flow of the pure water outlet increases, the pressure difference between the first water outlet cavity and the second water outlet cavity becomes larger, the overflow diaphragm gradually moves away from the return port, the water flow rate of the first water hole gradually increases, and the water output increases.

3. A diaphragm type dispensing valve according to claim 2, characterized in that: An overflow frame is fixedly connected to the overflow diaphragm, and the overflow frame is located on the side of the overflow diaphragm away from the return port. A convex column is extended toward the side of the overflow diaphragm by the overflow frame, and the convex column penetrates the overflow diaphragm. The first water hole is opened on the convex column, and the aperture of the first water hole gradually increases from the end away from the rectifying column to the end close to the rectifying column.

4. A diaphragm type dispensing valve according to claim 2 or 3, characterized in that: The shell is fixedly provided with a rectifier plate at the second water outlet cavity, the rectifier column is fixed or integrally provided on the rectifier plate, and the rectifier plate is provided with a second water hole for water to flow through.

5. A diaphragm type dispensing valve according to claim 1, 2 or 3, characterized in that: The negative pressure valve assembly includes a first valve plug, a first elastic member and an air pressure diaphragm. The first valve plug is located on the side of the first valve port close to the water outlet chamber. The first elastic member drives the first valve plug to block the first valve port. The air pressure diaphragm is installed in the negative pressure chamber. The air pressure diaphragm separates the negative pressure chamber into a first negative pressure chamber and a second negative pressure chamber. The first negative pressure chamber is connected to the external air, and the second negative pressure chamber is connected to the pure water outlet. The air pressure diaphragm can extend and retract in the direction close to the first valve port and drive the first valve plug to move through the upper top structure, thereby opening the first valve port to realize direct connection between the second negative pressure chamber and the first water outlet chamber. The air pressure diaphragm drives the movement distance of the first valve plug to change according to the change of the external negative pressure water absorption flow, thereby controlling the water output.

6. The diaphragm type dispensing valve according to claim 5, characterized in that: The upper push structure includes a pin, which is arranged on the air pressure diaphragm. The end of the pin can be extended into the first valve port. A second water passage for water to flow through is provided between the end of the pin and the inner wall of the first valve port. The pin can push the first valve plug away from the first valve port as the air pressure diaphragm moves, thereby opening the first valve port. A first movable chamber for the first valve plug to move is provided in the outer shell. The first movable chamber is fixedly provided with a first spring seat at one end away from the first valve port. A third water passage hole is provided on the first spring seat. The first elastic member is a first spring. The first spring is placed in the first movable chamber. One end of the first spring is abutted against the first spring seat, and the other end of the first spring is abutted against the first valve plug.

7. The diaphragm type dispensing valve according to claim 3, characterized in that: It also includes a return spring, which is placed at the first water outlet chamber. One end of the return spring is against the inner wall of the first water outlet chamber, and the other end of the return spring is against the overflow frame. The return spring can drive the overflow diaphragm to telescope and move toward the side close to the return port.

8. A diaphragm type dispensing valve according to claim 1, 2 or 3, characterized in that: The one-way valve assembly includes a second valve plug and a second spring. A second movable chamber for connecting the reflux port and the decompression chamber is provided in the shell. The second valve plug is movably provided in the second movable chamber. The second spring drives the second valve plug to block the reflux port. A second spring seat is fixedly provided at the end of the second movable chamber away from the reflux port. A fourth water hole is provided on the second spring seat. The second spring is placed in the second movable chamber. One end of the second spring is abutted against the second spring seat, and the other end of the second spring is abutted against the second valve plug.

9. A diaphragm type dispensing valve according to claim 1, 2 or 3, characterized in that: The pressure reducing valve assembly includes a pressure reducing bracket, a third valve plug, a pressure reducing diaphragm and a third spring. The pressure reducing bracket is installed on the housing through the pressure reducing diaphragm. The third valve plug is fixedly arranged on the pressure reducing bracket. The pressure reducing bracket is provided with a fifth water hole around the third valve plug. A second valve port for connecting the pressure reducing chamber and the raw water inlet is provided in the housing. The third spring can drive the pressure reducing bracket to move away from the second valve port. When the pressure in the pressure reducing chamber increases, the pressure reducing bracket can drive the third valve plug to move toward the second valve port, thereby gradually reducing or cutting off the water supply from the raw water inlet to the pressure reducing chamber.

10. The diaphragm type dispensing valve according to claim 9, characterized in that: An installation cavity for installing a third spring is provided in the shell, and the installation cavity is communicated with the external air. One end of the third spring is abutted against the decompression bracket, and the other end of the third spring is abutted against the inner wall of the installation cavity. A guide column is provided on the shell, and the guide column is located in the installation cavity. The decompression bracket slides around the guide column, and the decompression bracket and the guide column are sealed together.

Images