Water dispenser system with backflow pressure relief function

Abstract

The invention discloses a water dispenser system with backflow and pressure relief functions, which comprises a filter unit, a booster pump, a reverse osmosis membrane group and a drinking device which are communicated in sequence, a three-way backflow valve is arranged on a water path where the booster pump is communicated with the filter unit, and a water flow switch valve is arranged at the water production end of the reverse osmosis membrane group. The water inlet end of the water flow switch valve is provided with a return pipe communicated with the three-way return valve, and the water outlet end of the water flow switch valve is intersected with the water inlet end of the drinking water equipment; water at the water production end is conveyed to the three-way return valve through the return pipe, so that the water production end of the reverse osmosis membrane group is decompressed to avoid frequent starting of the water flow switch valve, and then the water is conveyed to the reverse osmosis membrane group through the booster pump. When the water consumption of the water using end is small, repeated power-on and power-off of the water flow switch valve can be avoided, potential safety hazards of the water dispenser system are reduced, meanwhile, pressure relief can be achieved at the water producing end, and normal use and the filtering effect of the reverse osmosis membrane set function are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of water dispenser systems, and in particular to a water dispenser system with a reflux pressure relief function. Background Art

[0002] The water dispenser system is mainly composed of a shell, an internal water system and a control panel. The control panel controls the operation of various valves, pumps, heating modules, etc. in the water system according to the instructions issued by the customer, thereby meeting the user's water needs. In some water dispenser systems with higher requirements, a reverse osmosis membrane group is also provided to further improve the quality of drinking water. The high-pressure switch in the water dispenser system controls the power on and off of the system by sensing the water pressure changes at the water production end of the reverse osmosis membrane. The water production of the same model of reverse osmosis membrane group is certain. When the water consumption at the water end is small, the water production end of the reverse osmosis membrane group produces pressure buildup, causing the water pressure to rise. When the water pressure reaches the set value of the high-pressure switch, the high-pressure switch stops. After the water pressure drops, the high-pressure switch starts, which causes the high-pressure switch to start and stop repeatedly, posing a safety hazard to the water dispenser system. At the same time, the repeated start and stop of the high-pressure switch causes the system to be repeatedly powered on and off, which will also cause damage to other components. The pressure buildup at the water production end also causes the function of the reverse osmosis membrane group to be damaged, resulting in poor filtration effect in the later stage. Summary of the invention

[0003] The purpose of the present invention is to provide a water dispenser system with a backflow pressure relief function. When the water consumption at the water use end is small, the water flow switch can be prevented from being frequently powered on and off, thereby reducing the safety hazards of the water dispenser system. At the same time, after the water pressure at the water production end of the reverse osmosis membrane group rises, the water production end can be pressure relieved to ensure the normal use of the reverse osmosis membrane group function and the filtering effect.

[0004] In order to solve the above technical problems, the present invention adopts the following solutions:

[0005] A drinking fountain system with a reflux pressure relief function comprises a filter unit, a booster pump, a reverse osmosis membrane group and a drinking water device which are connected in sequence, a three-way reflux valve is arranged on the water channel connecting the booster pump and the filter unit, a water production end of the reverse osmosis membrane group is provided with a water flow switch valve, a water inlet end of the water flow switch valve is provided with a reflux pipe connected to the three-way reflux valve, a water outlet end of the water flow switch intersects with a water inlet end of the drinking water device, when the water production end of the reverse osmosis membrane group is pressurized to a pressure greater than the water pressure at the water outlet end of the three-way reflux valve, water at the water production end is transported to the three-way reflux valve via the reflux pipe to release pressure at the water production end of the reverse osmosis membrane group to avoid frequent activation of the water flow switch valve, and then transported to the reverse osmosis membrane group by the booster pump.

[0006] Due to the adoption of the above technical solution, in the existing water dispenser system, the original high-pressure switch is replaced with a water flow switch valve, and a return pipe is connected to the water inlet end of the water flow switch valve or the water production end of the reverse osmosis membrane group. The return pipe is connected to the three-way return valve, and the three-way return valve is located in the water path where the filtration unit is connected to the booster pump. The original high-pressure switch is installed at the water production end of the reverse osmosis membrane group. When the water consumption is small, the water production end is pressurized to the set pressure value, and the high-pressure switch is closed. After the rear end uses water, the high-pressure switch is started again, which causes the high-pressure switch to be repeatedly started and stopped, thereby causing the water dispenser system to be repeatedly powered on and off, which can easily cause safety hazards to the system. This solution adds a three-way reflux valve and replaces the high-pressure switch with a water flow switch valve. A reflux pipe is added to the three-way reflux valve at the water production end of the reverse osmosis membrane group. When the water consumption is small, the reverse osmosis membrane group continues to produce water, and pressure buildup occurs at the water production end of the reverse osmosis membrane group until the water pressure at the water outlet end is greater than the water pressure at the water outlet end of the three-way reflux valve. The water at the water inlet end of the water flow switch valve is transported to the three-way reflux valve through the reflux pipe and then transported back to the reverse osmosis membrane group by the booster pump for continued filtration, thereby reducing the water pressure at the water production end of the reverse osmosis membrane group, making the reverse osmosis membrane group less likely to be damaged, ensuring the normal use of the reverse osmosis membrane group and the filtration effect, eliminating the pressure buildup phenomenon, and avoiding repeated starts and stops at the water flow switch valve.

[0007] Optionally, the drinking water equipment includes a water dispenser and a heating module. The water inlet ends of the heating module and the water dispenser are connected to the water outlet end of the water flow switch valve. The water outlet end of the heating module is provided with a hot water faucet, and the water outlet end of the water flow switch valve is also provided with a normal temperature faucet.

[0008] Optionally, a water inlet pipe is connected to the water inlet end of the filter unit, a water inlet solenoid valve is provided between the filter unit and the three-way reflux valve, and a drainage solenoid valve is provided at the concentrated water end of the reverse osmosis membrane group.

[0009] Optionally, the three-way return valve includes a first valve body and a pressure relief valve seat connected to the first valve body, a first sealing ring is pressed between the pressure relief valve seat and the first valve body, the first valve body is provided with a first water inlet connected to a water inlet solenoid valve, and a first water outlet connected to a boosting pump, the pressure relief valve seat is provided with a pressure relief port connected to a return pipe, and a water sealing ring and a pressure relief component for controlling the sealing or conduction of the water channel at the water sealing ring are formed on the water channel connecting the pressure relief port and the first water outlet.

[0010] Optionally, the pressure relief assembly includes a first head and a spring located between the pressure relief valve seat and the first valve body, one end of the spring acts on the outer wall of the first valve body, and the other end acts on the first head and presses the first head against a water sealing ring, forming a first water hole connected to the pressure relief port on the inner wall of the pressure relief valve seat, and a second water hole is provided on the side wall of the first valve body, and the water path between the second water hole and the first water outlet is in a normally open state. When the water pressure at the pressure relief port is greater than the water pressure at the first water outlet, the pressure relief assembly controls the water path at the water sealing ring to be connected, otherwise it is sealed.

[0011] Optionally, a base is provided at the bottom of the first valve body, a second sealing ring is pressed between the base and the first valve body, a first water passage chamber connected to the first water inlet is formed between the base and the first valve body, a second water passage chamber connected to the first water outlet and the second water hole is provided in the first valve body, and a flow control component located inside the first valve body is provided on the water path connecting the first water passage chamber and the second water passage chamber.

[0012] Optionally, the flow control component includes a first control rod and a first return spring. The first control rod is slidably disposed in the first valve body. A first valve cover is provided on the top of the first valve body. A first air hole connected to the atmosphere is provided on the side of the first valve cover. A first large air cavity connected to the first air hole is formed between the first control rod and the valve cover. One end of the first return spring acts on the first valve cover, and the other end acts on the first control rod. A third sealing ring is circumferentially embedded in the upper end of the first control rod. A flow limiting groove extending downward and not passing through the first control rod is provided on the side wall of the first control rod. The first control rod constitutes a flow control component for adjusting the amount of water between the first water inlet and the first water outlet under the joint action of the air pressure in the first large air cavity, the pressure in the second water cavity and the first return spring.

[0013] Optionally, the water flow switch valve includes a second valve body and a second valve cover, the upper end of the second valve body is connected to the lower end of the second valve cover, the upper end of the second valve cover is provided with a second water outlet and a third water outlet respectively connected to the normal temperature faucet and the heating module, the lower end of the second valve body is provided with a second water inlet connected to the water production end of the reverse osmosis membrane group, a Hall element is provided on the side of the second valve body, and a control component for controlling the power on or off of the Hall element is provided on the water path connecting the second water inlet and the second water outlet.

[0014] Optionally, the control assembly includes a second control rod, a second return spring, a second head and a magnet ring. The second valve cover is provided with a second air hole connected to the atmosphere on the side surface. A second air cavity connected to the second air hole is formed between the second valve body and the second valve cover. A third water passage cavity connected to the second water inlet is provided inside the second valve body. A stepped connecting column is provided at the lower end of the second control rod. The connecting column is located in the third water passage cavity. The second head is connected to the bottom end of the connecting column. The magnet ring is pressed tightly between the second head and the bottom end of the second control rod. A fourth sealing ring is circumferentially embedded in the second head. A water passage groove is provided on the side wall of the third water passage cavity. A fourth water passage cavity connected to the second water outlet is provided inside the second control rod. A third water hole connected to the water passage groove and the water channel of the fourth water passage cavity is provided at the lower end of the side wall of the second control rod. There is a fifth sealing ring, a pressure plate is circumferentially provided on the upper end of the second control rod, a pressure-sensitive diaphragm is pressed between the second valve cover and the second valve body, a pressure-sensitive chamber is formed between the pressure-sensitive diaphragm and the second valve cover, a fourth water hole is provided on the side wall of the upper end of the second control rod for connecting the pressure-sensitive chamber with the water path of the fourth water passage chamber, a fifth water hole is provided on the second valve cover for connecting the pressure-sensitive chamber with the third water outlet, the upper end of the second control rod is fixedly connected to the middle part of the pressure-sensitive diaphragm, a locking ring for pressing the middle part of the pressure-sensitive diaphragm is provided on the second control rod, a locking sleeve is pressed on the fifth sealing ring, one end of the second return spring acts on the locking sleeve, and the other end acts on the second control rod, the magnet ring approaches or moves away from the Hall element under the joint action of the water pressure in the pressure-sensitive chamber, the air pressure in the second atmospheric chamber and the second return spring, the Hall element is powered off when the magnet ring approaches, and powered on when the magnet ring moves away.

[0015] Optionally, a water sealing component for controlling the opening and closing of the water path by the water pressure in the fourth water flow chamber is provided at the second water outlet, the water sealing component includes a plug, a third return spring and a water sealing convex ring, a sixth water hole connected to the fourth water flow chamber is provided in the middle of the water sealing convex ring, one end of the third return spring acts on the inner wall of the second valve cover, and the other end acts on the plug and presses the plug onto the water sealing convex ring, and the plug controls the connection or blocking of the water path at the water sealing convex ring under the joint action of the water pressure in the fourth water flow chamber and the elastic force of the third return spring

[0016] The present invention has the beneficial effects:

[0017] 1. In the present invention, in the existing water dispenser system, the original high-pressure switch is replaced with a water flow switch valve, and a return pipe is connected to the water inlet end of the water flow switch valve or the water production end of the reverse osmosis membrane group. The return pipe is connected to the three-way return valve, and the three-way return valve is located on the water path where the filtration unit is connected to the booster pump. The original high-pressure switch is installed at the water production end of the reverse osmosis membrane group. When the water consumption is small, the water production end is pressurized to a set pressure value, and the high-pressure switch is closed. After the rear end uses water, the high-pressure switch is started again, which causes the high-pressure switch to be repeatedly started and stopped, thereby causing the water dispenser system to be repeatedly powered on and off, which is easy to cause safety hazards to the system. This solution adds a three-way reflux valve and replaces the high-pressure switch with a water flow switch valve. A reflux pipe is added to the three-way reflux valve at the water production end of the reverse osmosis membrane group. When the water consumption is small, the reverse osmosis membrane group continues to produce water, and pressure buildup occurs at the water production end of the reverse osmosis membrane group until the water pressure at the water outlet end is greater than the water pressure at the water outlet end of the three-way reflux valve. The water at the water inlet end of the water flow switch valve is transported to the three-way reflux valve through the reflux pipe and then transported back to the reverse osmosis membrane group by the booster pump for continued filtration, thereby reducing the water pressure at the water production end of the reverse osmosis membrane group, making the reverse osmosis membrane group less likely to be damaged, ensuring the normal use of the reverse osmosis membrane group and the filtration effect, eliminating the pressure buildup phenomenon, and avoiding repeated starts and stops at the water flow switch valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a three-way reflux valve;

[0020] Figure 3 This is a schematic diagram of the structure of the water flow switch.

[0021] 1-2-1 water inlet, 1-3-1 water passage cavity, 1-4-2 valve body, 1-5-1 sealing ring, 2-6-2 water hole, 3-1 spring, 4-1 sealing ring, 5-1 sealing ring, 6-2 water hole, 7-3-2 air hole, 8-4-3 return spring, 9-1-2 control rod, 10-2-2 valve cover, 11-3-1 water outlet, 12-4-1 pressure-sensitive cavity, 13-3-1 water outlet, 14-4-1 pressure-sensitive diaphragm, 15-5-1 sealing ring, 16-6-2 water passage cavity, 17-7-2 air hole, 18-3-1 sealing ring, 19-7-1 water passage cavity, 20-8-1 Hall element, 21-4-2 sealing ring, 22-5-1 sealing ring, 23-6-2 water hole, 24-7-1 spring, 25-4-2 sealing ring, 26-6-2 water hole, 27-7-1 spring, 28-4-2 sealing ring, 29-5-1 sealing ring, 30-6-2 water hole, 31-5-1 pressure-relief valve seat, 32-5-1 pressure-relief cavity, 33-5-1 air hole, 34-3 A valve cover, 35-a first return spring, 36-a first air cavity, 37-a third sealing ring, 38-a second water cavity, 39-a water production end, 40-a first water outlet, 41-a flow limiting groove, 42-a first water cavity, 43-a first control rod, 44-a base, 45-a second sealing ring, 46-a hot water tap, 47-a normal temperature water tap, 48-a water dispenser, 49-a fifth water hole, 50-a water inlet pipe, 51-a filter unit, 52-a water inlet solenoid valve, 53-a three-way reflux valve, 54-a booster pump, 55-a reverse osmosis membrane group, 56-a drain solenoid valve, 57-a water flow switch valve, 58-a fourth water hole, 59-a three-way joint, 60-a heating module, 61-a reflux pipe, 62-a mounting cavity, 63-a locking ring, 64-a water sealing convex ring, 65-a plug, 66-a sixth water hole, 67-a third return spring, 68-a convex plate. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1

[0026] A drinking fountain system with a reflux pressure relief function comprises a filter unit 51, a booster pump 54, a reverse osmosis membrane group 55 and a drinking water device which are connected in sequence, wherein a three-way reflux valve 53 is arranged on the water path connecting the booster pump 54 and the filter unit 51, a water production end 39 of the reverse osmosis membrane group 55 is provided with a water flow switch valve 57, a water inlet end of the water flow switch valve 57 is provided with a reflux pipe 61 connected to the three-way reflux valve 53, a water outlet end of the water flow switch intersects with a water inlet end of the drinking water device, when the water production end 39 of the reverse osmosis membrane group 55 is pressurized to a pressure greater than the water pressure at the water outlet end of the three-way reflux valve 53, water at the water production end 39 is transported to the three-way reflux valve 53 via the reflux pipe 61 to relieve the pressure at the water production end 39 of the reverse osmosis membrane group 55 to avoid frequent activation of the water flow switch valve 57, and then transported to the reverse osmosis membrane group 55 by the booster pump 54.

[0027] In this embodiment, Figure 1As shown, in the existing water dispenser 48 system, the original high-pressure switch is replaced with a water flow switch valve 57, and a three-way joint 59 is connected to the water inlet end of the water flow switch valve 57 or the water production end 39 of the reverse osmosis membrane group 55. One port of the three-way joint 59 is connected to the return pipe 61, and the other port is connected to the water flow switch valve 57. The return pipe 61 is connected to the three-way return valve 53. The three-way return valve 53 is located on the water path connected to the filter unit 51 and the booster pump 54. The original high-pressure switch is installed at the water production end 39 of the reverse osmosis membrane group 55. When the water consumption is small, the water production end 39 is pressed to the set pressure value, and the high-pressure switch is closed. After the rear end uses water, the high-pressure switch is started again, which causes the high-pressure switch to be repeatedly started and stopped, thereby causing the water dispenser 48 system to be repeatedly powered on and off, which is easy to cause safety hazards to the system. In this solution, a three-way reflux valve 53 is added and the high-pressure switch is replaced with a water flow switch valve 57. A reflux pipe 61 is added to the water production end 39 of the reverse osmosis membrane group 55 to the three-way reflux valve 53. When the water consumption is small, the reverse osmosis membrane group 55 continues to produce water, and a pressure build-up phenomenon occurs at the water production end 39 of the reverse osmosis membrane group 55 until the water pressure at the water outlet end is greater than the water pressure at the water outlet end of the three-way reflux valve 53. The water at the water inlet end of the water flow switch valve 57 is transported to the three-way reflux valve 53 through the reflux pipe 61, and then transported back to the reverse osmosis membrane group 55 by the booster pump 54 for continued filtration, thereby reducing the water pressure at the water production end 39 of the reverse osmosis membrane group 55, making the reverse osmosis membrane group 55 not easily damaged, ensuring the normal use of the reverse osmosis membrane group 55 and the filtering effect, eliminating the pressure build-up phenomenon, and avoiding repeated start and stop at the water flow switch valve 57.

[0028] Furthermore, the drinking water equipment includes a water dispenser 48 and a heating module 60. The water inlet ends of the heating module 60 and the water dispenser 48 are connected to the water outlet end of the water flow switch valve 57. The water outlet end of the heating module 60 is provided with a hot water faucet 46, and the water outlet end of the water flow switch valve 57 is also provided with a normal temperature water faucet 47.

[0029] Specifically, there are two water outlets at the water outlet end of the water flow switch valve 57, one of which is connected to the three-way joint 59, and the other is connected to the normal temperature water faucet 47. One port of the three-way joint 59 is connected to the heating membrane group 60, and the other port is connected to the water dispenser 48. After the purified water from the water flow switch 57 is transported to the heating module 60 through the three-way joint 59, it is heated and output from the hot water faucet 46, and the user can use hot water. When the purified water is transported to the normal temperature water faucet 47 by the three-way joint 59, the user can use the normal temperature purified water by turning on the normal temperature faucet 47. When the purified water is transported to the water dispenser 48 by the three-way joint 59, the user can drink directly from the water dispenser 48.

[0030] Furthermore, the water inlet end of the filter unit 51 is connected to a water inlet pipe 50 , a water inlet solenoid valve 52 is provided between the filter unit 51 and the three-way reflux valve 53 , and a water discharge solenoid valve 56 is provided at the concentrated water end of the reverse osmosis membrane group 55 .

[0031] Specifically, the water inlet solenoid valve 52 is used to automatically control the flow of water entering the three-way return valve 53 , and the water discharge solenoid valve 56 is used to automatically control the flow of concentrated water produced by the reverse osmosis membrane group 55 .

[0032] Example 2

[0033] Furthermore, the three-way return valve 53 includes a first valve body 23 and a pressure relief valve seat 31 connected to the first valve body 23, a first sealing ring 25 is pressed between the pressure relief valve seat 31 and the first valve body 23, the first valve body 23 is provided with a first water inlet 24 connected to the water inlet solenoid valve 52, and a first water outlet 40 connected to the boosting pump 54, the pressure relief valve seat 31 is provided with a pressure relief port 32 connected to the return pipe 61, and the water path connecting the pressure relief port 32 and the first water outlet 40 is formed with a water sealing ring 29 and a pressure relief component that controls the sealing or conduction of the water path at the water sealing ring 29.

[0034] In this embodiment, Figure 2 As shown, the three-way reflux valve 53 includes a first valve body 23 and a pressure relief valve seat 31. The pressure relief valve seat 31 is arranged on the side wall of the first valve body 23. The circumferential sleeve of the pressure relief valve seat 31 is provided with a first sealing ring 25. The first sealing ring 25 is pressed between the pressure relief valve seat 31 and the side wall of the first valve body 23 protruding outward to avoid water leakage; the first water inlet 24 is connected to the water outlet end of the water inlet solenoid valve 52, the first water outlet 40 is connected to the water inlet end of the booster pump 54, the pressure relief port 32 on the pressure relief valve seat 31 is connected to the reflux pipe 61, the pressure at both ends of the reflux pipe 61 is the same, the pressure at the inlet end of the reflux pipe 61 is the same as the pressure at the outlet end of the water flow switch valve 57, when the water consumption is small, the system is powered on and operates normally, the reverse osmosis membrane group 55 continues to produce water, and the water produced by the reverse osmosis membrane group 55 The water at the water production end 39 of the reverse osmosis membrane group 55 will be transported to the water outlet end of the water flow switch valve 57, causing the water pressure at the water outlet end to increase until the water pressure at the water outlet end (pressure relief port 32) is greater than the water pressure at the first water outlet 40. The pressure relief component opens the water path between the pressure relief port 32 and the first water outlet 40, and the water at the water outlet end of the water flow switch valve 57 is transported to the first water outlet 40 of the three-way reflux valve 53 through the reflux pipe 61, and then transported back to the reverse osmosis membrane group 55 by the booster pump 54 for continued filtration, thereby reducing the water pressure at the water production end 39 of the reverse osmosis membrane group 55, reducing the occurrence of pressure build-up, and avoiding frequent start-stop of the water flow switch valve 57. At the same time, after the pressure is released, the reverse osmosis membrane group 55 is not easily damaged, ensuring the normal use of the reverse osmosis membrane group 55 and the filtering effect.

[0035] Furthermore, the pressure relief assembly includes a first head 28 and a spring 27 located between the pressure relief valve seat 31 and the first valve body 23. One end of the spring 27 acts on the outer wall of the first valve body 23, and the other end acts on the first head 28 and presses the first head 28 against the water sealing ring 29. The inner wall of the pressure relief valve seat 31 forming the water sealing ring 29 is provided with a first water hole 30 connected to the pressure relief port 32, and a second water hole 26 is provided on the side wall of the first valve body 23. The water path between the second water hole 26 and the first water outlet 40 is in a normally open state. When the water pressure at the pressure relief port 32 is greater than the water pressure at the first water outlet 40, the pressure relief assembly controls the water path at the water sealing ring 29 to be connected, otherwise it is sealed.

[0036] The specific working principle of the pressure relief component: an installation cavity 62 is formed between the pressure relief valve seat 31 and the first valve body 23, and a pressure relief component is arranged in the installation cavity 62. The pressure relief component includes a first head 28 and a spring 27. The right end of the spring 27 acts on the side wall of the first valve body 23, and the left end acts on the right side of the first head 28 and presses the first head 28 against the water sealing ring 29 to seal the water path there. The water sealing ring 29 is composed of the inner wall of the pressure relief valve seat 31, and a first water hole 30 is opened on the inner wall of the water sealing ring 29, and a second water hole 26 is opened on the side wall of the first valve body 23. The first water hole 30 connects the water path between the pressure relief port 32 and the installation cavity 62, and the second water hole 26 connects the water path between the installation cavity 62 and the first water outlet 40. When the water pressure in the pressure relief port 32 is greater than the water pressure in the first water outlet 40, the pressure relief port 32 is filled with a liquid. When the water pressure acts on the first head 28 and overcomes the elastic force of the spring 27 and the water pressure at the first water outlet 40, the first head 28 moves to the left (in the direction of the second water hole 26), and the first head 28 is separated from the water sealing ring 29, and then the first water hole 30 is connected with the installation cavity 62, and the reflux water at the pressure relief port 32 enters the first water outlet 40 through the first water hole 30, the installation cavity 62, and the second water hole 26, and the booster pump 54 then pumps the water entering the first water outlet 40 back to the reverse osmosis membrane group 55 for continued filtration, so that the water pressure at the water production end 39 of the reverse osmosis membrane group 55 is reduced, and the pressure relief function is realized; when the water pressure at the pressure relief port 32 is reduced to a level that is not enough to overcome the elastic force of the spring 27 and the water pressure of the first water outlet 40, the spring 27 is reset so that the first head 28 is pressed again to seal the water path at the water sealing ring 29, waiting for the next pressure relief.

[0037] Example 3

[0038] Furthermore, a base 44 is provided at the bottom of the first valve body 23, a second sealing ring 45 is pressed between the base 44 and the first valve body 23, a first water passage chamber 42 connected to the first water inlet 24 is formed between the base 44 and the first valve body 23, a second water passage chamber 38 connected to the first water outlet 40 and the second water hole 26 is provided in the first valve body 23, and a flow control component located inside the first valve body 23 is provided on the water path connecting the first water passage chamber 42 and the second water passage chamber 38.

[0039] In this embodiment, Figure 2 As shown, an adaptable base 44 is installed at the bottom of the first valve body 23, and a second sealing ring 45 is circumferentially sleeved on the base 44 for sealing the installation gap between the base 44 and the first valve body 23 to avoid water leakage. A first water passage chamber 42 is formed between the base 44 and the first valve body 23, and a second water passage chamber 38 connected to the first water outlet 40 is formed inside the first valve body 23. The flow control component can adjust the water flow between the first water passage chamber 42 and the second water passage chamber 38. When the pressure relief return water volume is large, the flow control component can control the water volume entering the first water outlet 40 to decrease, and vice versa, control the water volume entering the first water outlet 40 to increase, thereby ensuring the normal water volume of the system.

[0040] Furthermore, the flow control component includes a first control rod 43 and a first return spring 35. The first control rod 43 is slidably arranged in the first valve body 23. A first valve cover 34 is provided on the top of the first valve body 23. A first air hole 33 connected to the atmosphere is provided on the side of the first valve cover 34. A first air cavity 36 connected to the first air hole 33 is formed between the first control rod 43 and the valve cover. One end of the first return spring 35 acts on the first valve cover 34, and the other end acts on the first control rod 43. A third sealing ring 37 is circumferentially embedded in the upper end of the first control rod 43. A flow limiting groove 41 extending downward and not penetrating the first control rod 43 is provided on the side wall of the first control rod 43. The first control rod 43 forms a flow control component for adjusting the water volume between the first water inlet 24 and the first water outlet 40 under the joint action of the air pressure in the first air cavity 36, the pressure in the second water passage cavity 38, and the first return spring 35.

[0041] The specific working principle of the flow control component is as follows: the first control rod 43 is T-shaped, and the first return spring 35 acts on the first valve cover 34 and the first control rod 43 at both ends, and a flow limiting groove 41 is provided on the side wall of the first control rod 43. When a large amount of water enters the second water passage chamber 38 from the second water hole 26, the water pressure in the second water passage chamber 38 increases and acts on the first control rod 43. The water pressure in the second water passage chamber 38 overcomes the elastic force of the first return spring 35 and the air pressure in the first air chamber 36, so that the first control rod 43 moves up, and the water passing area of ​​the flow limiting groove 41 and the first water passage chamber 42 is reduced, thereby The amount of water entering the second water passage chamber 38 from the first water passage chamber 42 is reduced. When the amount of water entering the second water passage chamber 38 from the second water passage hole is reduced, or the water in the second water passage chamber 38 is sucked away by the booster pump 54, the water pressure in the second water passage chamber 38 is reduced, and cannot overcome the elastic force of the first return spring 35 and the air pressure in the first air chamber 36. The first return spring 35 is reset and the first control rod 43 is set downward, so that the first control rod 43 moves downward, and the water flow area of ​​the flow limiting groove 41 and the first water passage chamber 42 is increased, thereby increasing the amount of water entering the second water passage chamber 38 from the first water passage chamber 42 to ensure the water supply of the entire system.

[0042] Example 4

[0043] Furthermore, the water flow switch valve 57 includes a second valve body 03 and a second valve cover 11. The upper end of the second valve body 03 is connected to the lower end of the second valve cover 11. The upper end of the second valve cover 11 is provided with a second water outlet 12 and a third water outlet 14 which are respectively connected to the normal temperature faucet 47 and the heating module 60. The lower end of the second valve body 03 is provided with a second water inlet 01 which is connected to the water production end 39 of the reverse osmosis membrane group 55. A Hall element 20 is provided on the side of the second valve body 03. A control component for controlling the power on or off of the Hall element 20 is provided on the water path connecting the second water inlet 01 and the second water outlet 12.

[0044] In this embodiment, Figure 3 As shown, when the water consumption is small, the water production end of the reverse osmosis membrane group 55 continues to produce water and produces a pressure-blocking phenomenon. The control component controls the Hall element 20 to be energized, and then the entire system is in an energized working state. The water production amount of the reverse osmosis membrane group 55 is certain, then the water production end 39 will produce a pressure-blocking phenomenon at the second water inlet 01 of the water flow switch valve 57. When the pressure value is greater than the pressure value at the water outlet end of the return pipe 61, the clean water of the water production end 39 will be transported to the three-way return valve 53 through the return pipe 61 to reduce the pressure at the water production end 39, avoiding repeated start and stop of the water flow switch valve 57. When the water consumption stops, the control component controls the Hall element 20 to cut off the power to the water flow switch valve 57, and then the entire system is powered off and stops working, and the reverse osmosis membrane group 55 no longer produces water.

[0045] Furthermore, the control assembly includes a second control rod 10, a second return spring 09, a second end cap 04 and a magnet ring 06. A second air hole 08 connected to the atmosphere is provided on the side of the second valve cover 11. A second air cavity 17 connected to the second air hole 08 is formed between the second valve body 03 and the second valve cover 11. A third water passage cavity 02 connected to the second water inlet 01 is provided inside the second valve body 03. A stepped connecting column 21 is provided at the lower end of the second control rod 10. The connecting column 21 is located in the third water passage cavity. 02, the second end cap 04 is connected to the bottom end of the connecting column 21, the magnet ring 06 is pressed between the second end cap 04 and the bottom end of the second control rod 10, the second end cap 04 is circumferentially embedded with a fourth sealing ring 22, the side wall of the third water chamber 02 is provided with a water groove 05, the inside of the second control rod 10 is provided with a fourth water chamber 16 connected to the second water outlet 12, the lower end of the side wall of the second control rod 10 is provided with a third water hole 07 connected to the water channel of the water groove 05 and the fourth water chamber 16, and the second control rod 10 is circumferentially provided with a fifth The sealing ring 19, a pressure plate is provided on the circumferential direction of the upper end of the second control rod 10, a pressure-sensitive diaphragm 15 is pressed between the second valve cover 11 and the second valve body 03, a pressure-sensitive cavity 13 is formed between the pressure-sensitive diaphragm 15 and the second valve cover 11, a fourth water hole 58 is provided on the side wall of the upper end of the second control rod 10 to connect the pressure-sensitive cavity 13 with the fourth water passage cavity 16, a fifth water hole 49 is provided on the second valve cover 11 to connect the pressure-sensitive cavity 13 with the third water outlet 14, the upper end of the second control rod 10 is fixedly connected to the middle of the pressure-sensitive diaphragm 15, and the second The control rod 10 is provided with a locking ring 63 for pressing the middle part of the pressure-sensitive diaphragm 15, and the fifth sealing ring 19 is pressed with a locking sleeve 18. One end of the second return spring 09 acts on the locking sleeve 18, and the other end acts on the circumferential convex plate 68 of the second control rod 10. The magnet ring 06 approaches or moves away from the Hall element 20 under the joint action of the water pressure in the pressure-sensitive chamber 13, the air pressure in the second atmospheric chamber 17, and the second return spring 09. When the magnet ring 06 approaches, the Hall element 20 is powered off, and when it moves away, the Hall element 20 is powered on.

[0046] The specific working principle of the control component is as follows: when the water-using end connected to the second water outlet 12 stops using water, the plug 65 blocks the water path at the water-sealing convex ring 64, and the water pressure in the pressure-sensing chamber 13 acts on the pressure-sensing diaphragm 15. When the water pressure in the pressure-sensing chamber 13 overcomes the elastic force of the second return spring 09 and the air pressure in the second atmospheric chamber 17, the second control rod 10 moves downward and compresses the second return spring 09, and the magnet ring 06 moves downward and approaches the Hall element 20 to a set distance and then the power is cut off, and the entire system is powered off and shut down. When it moves away from the set distance, the Hall element 20 is energized, and the reverse osmosis membrane group 55 no longer produces water. When the third water outlet 14 starts to use water, the water pressure in the pressure-sensing chamber 13 drops insufficiently to overcome the elastic force of the second return spring 09, the internal air pressure of the second atmospheric chamber 17 and the water pressure in the third water chamber 02, and the second return spring 0 9 reset drives the second control rod 10 to move up, and the magnet ring 06 approaches the Hall element 20. When it approaches to the set distance, the Hall element 20 is energized, the whole system is energized and starts to operate, and the reverse osmosis membrane group 55 continues to produce water. Similarly, when the second water outlet 12 starts to use water, the water pressure at the plug 65 decreases, and the water pressure of the third water chamber 02 overcomes the elastic force of the third reset spring 67, and the plug 65 is separated from the water sealing convex ring 64. The water in the fourth water chamber 16 is transported to the second water outlet 12 by the sixth water hole 66. The second control rod 10 moves up, and the magnet ring 06 moves away from the Hall element 20. The Hall element 20 is in a energized state, and the whole system is energized and operates. The fourth water hole 58 and the fifth water hole 49 are in a normally connected state with the fourth water chamber 16, which can ensure that the heating module 60 is always supplied with water. If the water consumption of the second water outlet 12 and the third water outlet 14 is less, the water pressure in the pressure sensing chamber 13 is lower than the water pressure in the third water chamber 02, so that the pressure is accumulated at the second water inlet 01. Under the action of the water pressure in the third water chamber 02, the second control rod 10 will be in a position away from the Hall element, and the water switch valve 57 will be in an energized state until the water pressure at the second water outlet 12 is greater than the water pressure in the second water chamber 38 inside the three-way reflux valve 53. Then, the water at the second water outlet 12 is transported to the three-way reflux valve 53 by the reflux pipe 61, so that the water production end 39 of the reverse osmosis membrane group 55 is depressurized. Since the water flow switch valve 57 is in an energized state, the reverse osmosis membrane group 55 will continue to produce water, so that the water pressure in the third water chamber 02 is relatively stable, and the position of the second control rod 10 will not change significantly downward, and thus the water flow switch valve 57 will not be frequently started and stopped even under high pressure.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A water dispenser system with a reflux pressure relief function, comprising a filter unit (51), a booster pump (54), a reverse osmosis membrane group (55), and a water drinking device connected in sequence, characterized in that: A three-way reflux valve (53) is provided on the water path connecting the booster pump (54) and the filter unit (51); a water flow switch valve (57) is provided at the water production end (39) of the reverse osmosis membrane group (55); a reflux pipe (61) connected to the three-way reflux valve (53) is provided at the water inlet end of the water flow switch valve (57); the water outlet end of the water flow switch intersects with the water inlet end of the drinking water device; when the water pressure at the water production end (39) of the reverse osmosis membrane group (55) is greater than the water pressure at the water outlet end of the three-way reflux valve (53), the water at the water production end (39) is transported to the three-way reflux valve (53) through the reflux pipe (61) so that the water production end (39) of the reverse osmosis membrane group (55) is depressurized to avoid frequent activation of the water flow switch valve (57); and then the water is transported to the reverse osmosis membrane group (55) by the booster pump (54).

2. A water dispenser (48) system with reflux pressure relief function according to claim 1, characterized in that: The drinking water equipment comprises a water dispenser (48) and a heating module (60). The water inlet ends of the heating module (60) and the water dispenser (48) are connected to the water outlet end of a water flow switch valve (57). The water outlet end of the heating module (60) is provided with a hot water tap (46), and the water outlet end of the water flow switch valve (57) is also provided with a normal temperature water tap (47).

3. A water dispenser system with reflux pressure relief function according to claim 1, characterized in that: The water inlet end of the filter unit (51) is connected to a water inlet pipe (50), a water inlet solenoid valve (52) is provided between the filter unit (51) and the three-way reflux valve (53), and a water discharge solenoid valve (56) is provided at the concentrated water end of the reverse osmosis membrane group (55).

4. A water dispenser system with reflux pressure relief function according to claim 1, characterized in that: The three-way return valve (53) comprises a first valve body (23) and a pressure relief valve seat (31) connected to the first valve body (23); a first sealing ring (25) is pressed between the pressure relief valve seat (31) and the first valve body (23); the first valve body (23) is provided with a first water inlet (24) connected to a water inlet solenoid valve (52) and a first water outlet (40) connected to a booster pump (54); the pressure relief valve seat (31) is provided with a pressure relief port (32) connected to a return pipe (61); a water channel connecting the pressure relief port (32) and the first water outlet (40) is provided with a water sealing ring (29) and a pressure relief component for controlling the sealing or conduction of the water channel at the water sealing ring (29).

5. A water dispenser system with reflux pressure relief function according to claim 4, characterized in that: The pressure relief component comprises a first seal (28) and a spring (27) located between the pressure relief valve seat (31) and the first valve body (23); one end of the spring (27) acts on the outer wall of the first valve body (23); the other end of the spring (27) acts on the first seal (28) and presses the first seal (28) against the water sealing ring (29); a first water hole (30) connected to the pressure relief port (32) is provided on the inner wall of the pressure relief valve seat (31) forming the water sealing ring (29); a second water hole (26) is provided on the side wall of the first valve body (23); the water path between the second water hole (26) and the first water outlet (40) is in a normally open state; when the water pressure at the pressure relief port (32) is greater than the water pressure at the first water outlet (40), the pressure relief component controls the water path at the water sealing ring (29) to be connected; otherwise, the water path is sealed.

6. A water dispenser system with reflux pressure relief function according to claim 5, characterized in that: A base (44) is provided at the bottom of the first valve body (23); a second sealing ring (45) is pressed between the base (44) and the first valve body (23); a first water passage chamber (42) connected to the first water inlet (24) is formed between the base (44) and the first valve body (23); a second water passage chamber (38) connected to the first water outlet (40) and the second water hole (26) is provided in the first valve body (23); a flow control component located inside the first valve body (23) is provided on the water path connecting the first water passage chamber (42) and the second water passage chamber (38).

7. A water dispenser system with reflux pressure relief function according to claim 6, characterized in that: The flow control assembly comprises a first control rod (43) and a first return spring (35). The first control rod (43) is slidably arranged in the first valve body (23). A first valve cover (34) is arranged on the top of the first valve body (23). A first air hole (33) connected to the atmosphere is arranged on the side of the first valve cover (34). A first air cavity (36) connected to the first air hole (33) is formed between the first control rod (43) and the valve cover. One end of the first return spring (35) acts on the first valve cover (34), and the other end acts on the first valve cover (34). The first control rod (43) is provided with a third sealing ring (37) embedded in the circumferential direction of the upper end of the first control rod (43). A flow limiting groove (41) extending downward and not penetrating the first control rod (43) is provided on the side wall of the first control rod (43). The first control rod (43) forms a flow control component for adjusting the amount of water between the first water inlet (24) and the first water outlet (40) under the joint action of the air pressure in the first air chamber (36), the pressure in the second water chamber (38) and the first return spring (35).

8. The water dispenser system with reflux pressure relief function according to claim 1, characterized in that: The water flow switch valve (57) comprises a second valve body (03) and a second valve cover (11); the upper end of the second valve body (03) is connected to the lower end of the second valve cover (11); the upper end of the second valve cover (11) is provided with a second water outlet (12) and a third water outlet (14) respectively connected to a normal temperature water faucet (47) and a heating module (60); the lower end of the second valve body (03) is provided with a second water inlet (01) connected to a water production end (39) of a reverse osmosis membrane group (55); a Hall element (20) is provided on the side of the second valve body (03); and a control component for controlling the Hall element (20) to be energized or de-energized is provided on the water path connecting the second water inlet (01) and the second water outlet (12).

9. A water dispenser system with reflux pressure relief function according to claim 8, characterized in that: The control assembly comprises a second control rod (10), a second return spring (09), a second sealing head (04) and a magnet ring (06); a second air hole (08) connected to the atmosphere is provided on the side of the second valve cover (11); a second air chamber (17) connected to the second air hole (08) is formed between the second valve body (03) and the second valve cover (11); a third water passage chamber (02) connected to the second water inlet (01) is provided inside the second valve body (03); a stepped connecting column (21) is provided at the lower end of the second control rod (10); the connecting column (21) is located in the third water passage chamber (02) The second sealing head (04) is connected to the bottom end of the connecting column (21), the magnet ring (06) is pressed between the second sealing head (04) and the bottom end of the second control rod (10), the second sealing head (04) is circumferentially embedded with a fourth sealing ring (22), the side wall of the third water passage chamber (02) is provided with a water passage groove (05), the inside of the second control rod (10) is provided with a fourth water passage chamber (16) connected to the second water outlet (12), the lower end of the side wall of the second control rod (10) is provided with a third water hole (07) connected to the water passage of the water passage groove (05) and the fourth water passage chamber (16), the second control rod (10) is circumferentially provided with a third A fifth sealing ring (19) is provided, a pressure plate is provided on the circumferential direction of the upper end of the second control rod (10), a pressure-sensitive diaphragm (15) is pressed between the second valve cover (11) and the second valve body (03), a pressure-sensitive cavity (13) is formed between the pressure-sensitive diaphragm (15) and the second valve cover (11), a fourth water hole (58) is provided on the side wall of the upper end of the second control rod (10) for connecting the pressure-sensitive cavity (13) and the fourth water passage cavity (16), a fifth water hole (49) is provided on the second valve cover (11) for connecting the pressure-sensitive cavity (13) and the third water outlet (14), the upper end of the second control rod (10) and the middle part of the pressure-sensitive diaphragm (15) are connected. The second control rod (10) is fixedly connected, a locking ring (63) for pressing the middle part of the pressure-sensitive diaphragm (15) is provided on the second control rod (10), a locking sleeve (18) is pressed on the fifth sealing ring (19), one end of the second return spring (09) acts on the locking sleeve (18), and the other end acts on the second control rod (10), the magnet ring (06) approaches or moves away from the Hall element (20) under the joint action of the water pressure of the pressure-sensitive chamber (13), the air pressure in the second air chamber (17), and the second return spring (09), when the magnet ring (06) approaches, the Hall element (20) is powered off, and when the magnet ring (06) moves away, the Hall element (20) is powered on.

10. A water dispenser (48) system with reflux pressure relief function according to claim 9, characterized in that: A water sealing component is provided at the second water outlet (12) for controlling the on / off of the water path through the water pressure of the fourth water chamber (16), the water sealing component comprising a plug (65), a third return spring (67) and a water sealing convex ring (64), a sixth water hole (66) connected to the fourth water chamber (16) being provided in the middle of the water sealing convex ring (64), one end of the third return spring (67) acting on the inner wall of the second valve cover (11), and the other end of the third return spring (67) acting on the plug (65) and pressing the plug (65) against the water sealing convex ring (64), the plug (65) controlling the on / off of the water path at the water sealing convex ring (64) under the combined action of the water pressure of the fourth water chamber (16) and the elastic force of the third return spring (67).

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