Water dispenser system with backflow pressure relief function

Abstract

The utility model discloses a water dispenser system with backflow pressure relief function, 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 a 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 group function are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water machine systems, and particularly relates to a drinking water machine system with a reflux pressure relief function. Background Art

[0002] A drinking water machine system mainly consists of a housing, an internal water circuit system and a control board. The control board controls the work of various valves, pumps, heating modules, etc. in the water circuit system according to the instructions issued by customers, so as to meet the water use needs of users. In some drinking water machine systems with higher requirements, a reverse osmosis membrane module is also provided to further improve the quality of drinking water. The high-pressure switch in the drinking water machine system controls the on-off of the system by sensing the water pressure change at the water production end of the reverse osmosis membrane. The water production volume of the reverse osmosis membrane module of the same model is certain. When the water consumption at the water use end is small, the water production end of the reverse osmosis membrane module generates pressure buildup, causing the water pressure to rise. When it reaches the set value of the high-pressure switch, the high-pressure switch stops. After the water pressure drops, the high-pressure switch starts. This causes the high-pressure switch to start and stop repeatedly, bringing potential safety hazards to the drinking water machine 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 damage other components. The pressure buildup at the water production end also causes the function of the reverse osmosis membrane module to be damaged, and the later filtration effect is not good. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a drinking water machine system with a reflux pressure relief function, which can avoid the frequent on-off of the water flow switch when the water consumption at the water use end is small, reduce the potential safety hazards of the drinking water machine system, and at the same time, after the water pressure at the water production end of the reverse osmosis membrane module rises, it can relieve the pressure at the water production end to ensure the normal use of the function of the reverse osmosis membrane module and the filtration effect.

[0004] To solve the above technical problems, the utility model adopts the following scheme:

[0005] A drinking water machine system with a reflux pressure relief function includes a filtration unit, a booster pump, a reverse osmosis membrane module, and a drinking water device that are connected in sequence. A three-way reflux valve is provided on the water path where the booster pump is connected to the filtration unit. A water flow switch valve is provided at the water production end of the reverse osmosis membrane module. A reflux pipe connected to the three-way reflux valve is provided at the water inlet end of the water flow switch valve. The water outlet end of the water flow switch intersects with the water inlet end of the drinking water device. When the water production end of the reverse osmosis membrane module is under pressure buildup until the water pressure is greater than the water pressure at the water outlet end of the three-way reflux valve, the water at the water production end is transported to the three-way reflux valve through the reflux pipe to relieve the pressure at the water production end of the reverse osmosis membrane module to avoid the frequent start of the water flow switch valve, and then is transported to the reverse osmosis membrane module 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. At the same time, 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 module. The return pipe is connected to a 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 module. When the water consumption is small, when the water production end is pressurized to the set pressure value, the high-pressure switch closes. After the water is used at the back end, the high-pressure switch starts again. This leads to the repeated start and stop of the high-pressure switch, resulting in the repeated power on and off of the water dispenser system, which is likely to cause potential safety hazards to the system. In this solution, a three-way return valve is added and the high-pressure switch is replaced with a water flow switch valve. A return pipe is added from the water production end of the reverse osmosis membrane module to the three-way return valve. When the water consumption is small, the reverse osmosis membrane module continues to produce water, and a pressure build-up phenomenon occurs at the water production end of the reverse osmosis membrane module. Until the water pressure at the water outlet end is greater than the water pressure at the water outlet end of the three-way return valve, the water at the water inlet end of the water flow switch valve is transported to the three-way return valve through the return pipe, and then transported back to the reverse osmosis membrane module by the booster pump for continuous filtration. Thereby reducing the water pressure at the water production end of the reverse osmosis membrane module, making the reverse osmosis membrane module not easily damaged, ensuring the normal use of the function of the reverse osmosis membrane module and the filtration effect, and eliminating the pressure build-up phenomenon, avoiding the repeated start and stop at the water flow switch valve.

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

[0008] Optionally, a water inlet pipe is connected to the water inlet end of the filtration unit. An inlet solenoid valve is provided between the filtration unit and the three-way return valve, and a drain solenoid valve is provided at the concentrated water end of the reverse osmosis membrane module.

[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 the inlet solenoid valve and a first water outlet connected to the booster pump. The pressure relief valve seat is provided with a pressure relief port connected to the return pipe. A water sealing collar is formed on the water path where the pressure relief port is connected to the first water outlet, and a pressure relief component for controlling the sealing or conduction of the water path at the water sealing collar is provided.

[0010] Optionally, the pressure relief component includes a first sealing 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 sealing head and presses the first sealing head against the water sealing collar. A first water hole connected to the pressure relief port is provided on the inner wall of the pressure relief valve seat forming the water sealing collar. 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 component controls the water path at the water sealing collar 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 cavity communicating with the first water inlet is formed between the base and the first valve body. A second water passage cavity communicating with the first water outlet and the second water hole is provided inside the first valve body. A flow control assembly located inside the first valve body is provided on the water path where the first water passage cavity communicates with the second water passage cavity.

[0012] Optionally, the flow control assembly includes a first control rod and a first return spring. The first control rod is slidably arranged inside the first valve body. A first valve cover is provided at the top of the first valve body. A first air hole communicating with the atmosphere is provided on the side of the first valve cover. A first atmosphere cavity communicating with 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 at the upper end of the first control rod. A current-limiting groove extending downward and not penetrating the first control rod is provided on the side wall of the first control rod. The first control rod constitutes a flow control assembly for adjusting the water volume between the first water inlet and the first water outlet under the combined action of the air pressure in the first atmosphere cavity, the pressure in the second water passage 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. A second water outlet and a third water outlet respectively communicating with a normal temperature faucet and a heating module are provided at the upper end of the second valve cover. A second water inlet connected to the water production end of the reverse osmosis membrane module is provided at the lower end of the second valve body. A Hall element is provided on the side of the second valve body. A control assembly for controlling the Hall element to be powered on or off is provided on the water path where the second water inlet communicates with the second water outlet.

[0014] Optionally, the control component includes a second control rod, a second return spring, a second sealing head and a magnet ring. A second air hole communicating with the atmosphere is provided on the side of the second valve cover. A second atmosphere cavity communicating with the second air hole is formed between the second valve body and the second valve cover. A third water passage cavity communicating with 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 sealing head is connected to the bottom end of the connecting column. The magnet ring is pressed between the second sealing head and the bottom end of the second control rod. A fourth sealing ring is circumferentially embedded in the second sealing head. A water passing groove is provided on the side wall of the third water passage cavity. A fourth water passage cavity communicating with the second water outlet is provided inside the second control rod. A third water hole for connecting the water passing groove and the fourth water passage cavity is provided at the lower end of the side wall of the second control rod. A fifth sealing ring is provided circumferentially on the second control rod. A pressing plate is provided circumferentially at 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 cavity is formed between the pressure-sensitive diaphragm and the second valve cover. A fourth water hole for connecting the pressure-sensitive cavity and the fourth water passage cavity is provided on the side wall at the upper end of the second control rod. A fifth water hole for connecting the pressure-sensitive cavity and the third water outlet is provided on the second valve cover. The upper end of the second control rod is fixedly connected to the middle of the pressure-sensitive diaphragm. A locking ring for pressing the middle 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 combined action of the water pressure in the pressure-sensitive cavity, the air pressure in the second atmosphere cavity and the second return spring. When the magnet ring approaches, the Hall element is powered off, and when it moves away, the Hall element is powered on.

[0015] Optionally, a water sealing component for controlling the on-off of the water passage by the water pressure in the fourth water passage cavity 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 communicating with the fourth water passage cavity 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 on the water sealing convex ring. The plug controls the on-off of the water passage at the water sealing convex ring under the combined action of the water pressure in the fourth water passage cavity and the elastic force of the third return spring.

[0016] The beneficial effects of the present utility model are:

[0017] 1. In the present utility model, in the existing water dispenser system, the original high-pressure switch is replaced with a water flow switch valve. At the same time, 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 module. The return pipe is connected to a 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 module. When the water consumption is small, when the water production end is pressurized to the set pressure value, the high-pressure switch closes. After water is used at the back end, the high-pressure switch starts again. This causes the high-pressure switch to start and stop repeatedly, resulting in the repeated power-on and power-off of the water dispenser system, which is likely to cause safety hazards to the system. This solution adds a three-way return valve and replaces the high-pressure switch with a water flow switch valve. A return pipe is added from the water production end of the reverse osmosis membrane module to the three-way return valve. When the water consumption is small, the reverse osmosis membrane module continues to produce water, and a pressurization phenomenon occurs at the water production end of the reverse osmosis membrane module. Until the water pressure at the water outlet end is greater than the water pressure at the water outlet end of the three-way return valve, the water at the water inlet end of the water flow switch valve is transported to the three-way return valve through the return pipe, and then transported back to the reverse osmosis membrane module by the booster pump for continuous filtration. Thereby reducing the water pressure at the water production end of the reverse osmosis membrane module, making the reverse osmosis membrane module not easily damaged, ensuring the normal use of the function of the reverse osmosis membrane module and the filtration effect, and eliminating the pressurization phenomenon, avoiding repeated start and stop at the water flow switch valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the present utility model;

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

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

[0021] Reference numerals: 01 - Second water inlet, 02 - Third water passing cavity, 03 - Second valve body, 04 - Second end cap, 05 - Water passing groove, 06 - Magnet ring, 07 - Third water hole, 08 - Second air hole, 09 - Second return spring, 10 - Second control rod, 11 - Second valve cover, 12 - Second water outlet, 13 - Pressure sensing cavity, 14 - Third water outlet, 15 - Pressure sensing diaphragm, 16 - Fourth water passing cavity, 17 - Second atmosphere cavity, 18 - Locking sleeve, 19 - Fifth sealing ring, 20 - Hall element, 21 - Connecting column, 22 - Fourth sealing ring, 23 - First valve body, 24 - First water inlet, 25 - First sealing ring, 26 - Second water hole, 27 - Spring, 28 - First end cap, 29 - Water sealing collar, 30 - First water hole, 31 - Pressure relief valve seat, 32 - Pressure relief port, 33 - First air hole, 34 - First valve cover, 35 - First return spring, 36 - First atmosphere cavity, 37 - Third sealing ring, 38 - Second water passing cavity, 39 - Water production end, 40 - First water outlet, 41 - Flow limiting groove, 42 - First water passing cavity, 43 - First control rod, 44 - Base, 45 - Second sealing ring, 46 - Hot water faucet, 47 - Normal temperature water faucet, 48 - Water dispenser, 49 - Fifth water hole, 50 - Water inlet pipe, 51 - Filter unit, 52 - Water inlet solenoid valve, 53 - Three - way return valve, 54 - Booster pump, 55 - Reverse osmosis membrane module, 56 - Drain solenoid valve, 57 - Water flow switch valve, 58 - Fourth water hole, 59 - Three - way joint, 60 - Heating module, 61 - Return pipe, 62 - Installation cavity, 63 - Locking ring, 64 - Water sealing convex ring, 65 - Plug, 66 - Sixth water hole, 67 - Third return spring, 68 - Convex plate. Detailed implementation manners

[0022] The following combines the embodiments and the attached drawings to further elaborate on the present utility model in detail. However, the implementation manners of the present utility model are not limited thereto.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the attached drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "provided with", "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] A water dispenser system with a reflux pressure relief function, comprising a filtration unit 51, a booster pump 54, a reverse osmosis membrane module 55, and a drinking water device that are connected in sequence. It is characterized in that a three-way reflux valve 53 is provided on the water path where the booster pump 54 is connected to the filtration unit 51, a water flow switch valve 57 is provided at the water production end 39 of the reverse osmosis membrane module 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 converges 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 module 55 builds up to be 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 to relieve the pressure at the water production end 39 of the reverse osmosis membrane module 55 to avoid frequent startup of the water flow switch valve 57, and then is transported to the reverse osmosis membrane module 55 by the booster pump 54.

[0027] In this embodiment, as Figure 1As shown in the figure, in the existing water dispenser 48 system, the original high-pressure switch is replaced with a water flow switch valve 57. At the same time, a tee 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 module 55. One port of the tee joint 59 is connected to a return pipe 61, and the other port is connected to the water flow switch valve 57. The return pipe 61 is connected to a three-way return valve 53. The three-way return valve 53 is located on the water path where the filtration unit 51 is connected to the booster pump 54. The original high-pressure switch is installed at the water production end 39 of the reverse osmosis membrane module 55. When the water consumption is small, when the water production end 39 is pressurized to the set pressure value, the high-pressure switch closes. After the water is used at the back end, the high-pressure switch starts again. This causes the high-pressure switch to start and stop repeatedly, resulting in the repeated power on and off of the water dispenser 48 system, which is likely to cause potential safety hazards to the system. In this solution, a three-way return valve 53 is added and the high-pressure switch is replaced with a water flow switch valve 57. A return pipe 61 is added from the water production end 39 of the reverse osmosis membrane module 55 to the three-way return valve 53. When the water consumption is small, the reverse osmosis membrane module 55 continues to produce water, and the water production end 39 of the reverse osmosis membrane module 55 has a pressurized phenomenon. Until the water pressure at the water outlet end is greater than the water pressure at the water outlet end of the three-way return valve 53, the water at the water inlet end of the water flow switch valve 57 is transported to the three-way return valve 53 through the return pipe 61, and then transported back to the reverse osmosis membrane module 55 by the booster pump 54 for continuous filtration. Thus, the water pressure at the water production end 39 of the reverse osmosis membrane module 55 is reduced, making the reverse osmosis membrane module 55 not easily damaged, ensuring the normal use of the function of the reverse osmosis membrane module 55 and the filtration effect. The elimination of the pressurized phenomenon avoids the repeated start and stop at the water flow switch valve 57.

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

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

[0030] Further, a water inlet pipe 50 is connected to the water inlet end of the filtration unit 51. An inlet electromagnetic valve 52 is provided between the filtration unit 51 and the three-way return valve 53. A drain electromagnetic valve 56 is provided at the concentrated water end of the reverse osmosis membrane module 55.

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

[0032] Embodiment 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 inlet solenoid valve 52 and a first water outlet 40 connected to the booster pump 54. The pressure relief valve seat 31 is provided with a pressure relief port 32 connected to the return pipe 61. A water sealing collar 29 is formed on the water path where the pressure relief port 32 is connected to the first water outlet 40, and a pressure relief component for controlling the sealing or conduction of the water path at the water sealing collar 29 is provided.

[0034] In this embodiment, as Figure 2 shown, the three-way return 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. A first sealing ring 25 is sleeved circumferentially on the pressure relief valve seat 31. The first sealing ring 25 is pressed between the pressure relief valve seat 31 and the outwardly protruding side wall of the first valve body 23, which can avoid water leakage; the first water inlet 24 is connected to the water outlet end of the 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 return pipe 61, the pressures at both ends of the return pipe 61 are the same, and the pressure at the inlet end of the return 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 normally powered on and operates, and the reverse osmosis membrane module 55 continues to produce water. A pressure buildup phenomenon occurs at the water production end 39 of the reverse osmosis membrane module 55. The water at the water production end 39 of the reverse osmosis membrane module 55 will be transported to the outlet end of the water flow switch valve 57, resulting in an increase in the water pressure at the outlet end. When the water pressure at the 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. The water at the outlet end of the water flow switch valve 57 is transported through the return pipe 61 to the position of the first water outlet 40 of the three-way return valve 53, and then transported back to the reverse osmosis membrane module 55 by the booster pump 54 for continuous filtration. Thereby, the water pressure at the water production end 39 of the reverse osmosis membrane module 55 is reduced, the generation of the pressure buildup phenomenon is reduced, the frequent start and stop of the water flow switch valve 57 are avoided, and at the same time, the reverse osmosis membrane module 55 is not easily damaged after pressure relief, ensuring the normal use of the function of the reverse osmosis membrane module 55 and the filtration effect.

[0035] Further, the pressure relief component 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 collar 29. A first water hole 30 communicating with the pressure relief port 32 is provided on the inner wall of the pressure relief valve seat 31 of the water sealing collar 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 normally open. 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 collar 29 to be connected, and vice versa for sealing.

[0036] 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. The pressure relief component is arranged in the installation cavity 62 and 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 tightly against the water sealing collar 29 to seal the water path at this place. The water sealing collar 29 is formed by the inner wall of the pressure relief valve seat 31. A first water hole 30 is opened on the inner wall forming the water sealing collar 29. 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 at the pressure relief port 32 is greater than the water pressure at the first water outlet 40, the water pressure in the pressure relief port 32 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 (the direction of the second water hole 26), the first head 28 is separated from the water sealing collar 29, and then the first water hole 30 is connected to the installation cavity 62. The return 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. The booster pump 54 then pumps the water entering the first water outlet 40 back to the reverse osmosis membrane module 55 for continuous filtration. In this way, the water pressure at the water production end 39 of the reverse osmosis membrane module 55 is reduced, and the pressure relief function is realized; when the water pressure at the pressure relief port 32 is reduced to be insufficient to overcome the elastic force of the spring 27 and the water pressure at the first water outlet 40, the spring 27 resets to make the first head 28 press and seal the water path at the water sealing collar 29 again, waiting for the next pressure relief.

[0037] Embodiment 3

[0038] Further, 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 passing cavity 42 communicating with the first water inlet 24 is formed between the base 44 and the first valve body 23. A second water passing cavity 38 communicating with 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 passing cavity 42 and the second water passing cavity 38.

[0039] In this embodiment, as Figure 2 shown, a suitable base 44 is installed at the bottom of the first valve body 23. A second sealing ring 45 is sleeved circumferentially on the base 44 to seal the installation gap between the base 44 and the first valve body 23, avoiding water leakage. A first water passage chamber 42 is formed between the base 44 and the first valve body 23. A second water passage chamber 38 communicating with the first water outlet 40 is formed inside the first valve body 23. The flow control assembly 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 assembly can control the water volume entering the first water outlet 40 to decrease. Conversely, it controls the water volume entering the first water outlet 40 to increase, ensuring the normal water volume of the system.

[0040] Further, the flow control assembly includes a first control rod 43 and a first return spring 35. The first control rod 43 is slidably arranged inside the first valve body 23. A first valve cover 34 is provided at the top of the first valve body 23. A first air hole 33 communicating with the atmosphere is provided on the side of the first valve cover 34. A first atmosphere chamber 36 communicating with 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 at 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 constitutes a flow control assembly for adjusting the water volume between the first water inlet 24 and the first water outlet 40 under the combined action of the air pressure in the first atmosphere chamber 36, the pressure in the second water passage chamber 38, and the first return spring 35.

[0041] Specific working principle of the flow control assembly: The first control rod 43 is in a T shape. Both ends of the first return spring 35 act on the first valve cover 34 and the first control rod 43 respectively. A section of flow limiting groove 41 is provided on the side wall of the first control rod 43. When the water volume entering the second water passage chamber 38 from the second water hole 26 is large, the water pressure in the second water chamber 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 atmosphere chamber 36, causing the first control rod 43 to move upward. The water passing area between the flow limiting groove 41 and the first water passage chamber 42 decreases, and thus the water volume entering the second water passage chamber 38 from the first water passage chamber 42 decreases. When the water volume entering the second water passage chamber 38 from the second water hole decreases, or when 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 decreases and cannot overcome the elastic force of the first return spring 35 and the air pressure in the first atmosphere chamber 36. The first return spring 35 resets and presses the first control rod 43 downward, causing the first control rod 43 to move downward. The water passing area between the flow limiting groove 41 and the first water passage chamber 42 increases, and thus the water volume entering the second water passage chamber 38 from the first water passage chamber 42 increases to ensure the water supply volume 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 connected to the water production end 39 of the reverse osmosis membrane module 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 power-off of the Hall element 20 is provided on the water path where the second water inlet 01 is connected to the second water outlet 12.

[0044] In this embodiment, as Figure 3 shown, when the water consumption is small, the water production end of the reverse osmosis membrane module 55 continues to produce water and a pressure buildup phenomenon occurs. The control component controls the Hall element 20 to be powered on, and then the entire system is in the powered-on working state. The water production amount of the reverse osmosis membrane module 55 is certain, so a pressure buildup phenomenon will occur at the second water inlet 01 of the water flow switch valve 57 at the water production end 39. When the pressure value is greater than the pressure value at the water outlet end of the return pipe 61, the purified water at the water production end 39 will be transported into the three-way return valve 53 through the return pipe 61 to reduce the pressure at the water production end 39, avoiding the repeated start and stop of the water flow switch valve 57. When the water use stops, the control component controls the Hall element 20 to be powered off, causing the water flow switch valve 57 to be powered off, and then the entire system is powered off and stops working, and the reverse osmosis membrane module 55 also stops producing water.

[0045] Further, the control component 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 communicating with the atmosphere is provided on the side of the second valve cover 11. A second atmosphere chamber 17 communicating with the second air hole 08 is formed between the second valve body 03 and the second valve cover 11. A third water passing chamber 02 communicating with 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 passing chamber 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. A fourth sealing ring 22 is circumferentially embedded in the second end cap 04. A water passing groove 05 is provided on the side wall of the third water passing chamber 02. A fourth water passing chamber 16 communicating with the second water outlet 12 is provided inside the second control rod 10. A third water hole 07 connecting the water passing groove 05 and the fourth water passing chamber 16 is provided at the lower end of the side wall of the second control rod 10. A fifth sealing ring 19 is provided circumferentially on the second control rod 10. A pressing plate is provided circumferentially at 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 chamber 13 is formed between the pressure-sensitive diaphragm 15 and the second valve cover 11. A fourth water hole 58 connecting the pressure-sensitive chamber 13 and the fourth water passing chamber 16 is provided on the side wall at the upper end of the second control rod 10. A fifth water hole 49 connecting the pressure-sensitive chamber 13 and the third water outlet 14 is provided on the second valve cover 11. The upper end of the second control rod 10 is fixedly connected to the middle of the pressure-sensitive diaphragm 15. A locking ring 63 for pressing the middle 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 a convex plate 68 on the circumference of the second control rod 10. The magnet ring 06 approaches or moves away from the Hall element 20 under the combined action of the water pressure in the pressure-sensitive chamber 13, the air pressure in the second atmosphere 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] Specific working principle of the control component: When the water-using end connected to the second water outlet 12 stops using water, the waterway at the water-sealing convex ring 64 is blocked by the plug 65. When the water pressure in the pressure-sensing cavity 13 acts on the pressure-sensing diaphragm 15 and the water pressure in the pressure-sensing cavity 13 overcomes the elastic force of the second return spring 09 and the air pressure in the second air cavity 17, the second control rod 10 moves downward and compresses the second return spring 09. When the magnet ring 06 moves downward and approaches the Hall element 20 to a set distance, the power is cut off and the entire system shuts down. When it is far away from the set distance, the Hall element 20 is powered on and the reverse osmosis membrane module 55 also stops producing water. When the third water outlet 14 starts using water, when the water pressure in the pressure-sensing cavity 13 decreases and is not enough to overcome the elastic force of the second return spring 09, the internal air pressure of the second air cavity 17 and the water pressure in the third water passage cavity 02, the second return spring 09 resets and drives the second control rod 10 to move upward. The magnet ring 06 approaches the Hall element 20. When it approaches the set distance, the Hall element 20 is powered on and the entire system is powered on and starts to operate. The reverse osmosis membrane module 55 continues to produce water. Similarly, when the second water outlet 12 starts using water, the water pressure at the plug 65 decreases, and the water pressure in the third water passage cavity 02 overcomes the elastic force of the third return spring 67, and the plug 65 is separated from the water-sealing convex ring 64. The water in the fourth water passage cavity 16 is transported to the second water outlet 12 through the sixth water hole 66. The second control rod 10 moves upward, and the magnet ring 06 moves away from the Hall element 20. The Hall element 20 is in the powered-on state, and the entire system is powered on and operates. The fourth water hole 58 and the fifth water hole 49 are always in a communicating state with the fourth water passage cavity 16, which can ensure that the heating module 60 is always supplied with water. If the water consumption at the second water outlet 12 and the third water outlet 14 is small, the water pressure in the pressure-sensing cavity 13 is lower than the water pressure in the third water passage cavity 02, causing backpressure at the second water inlet 01. Under the action of the water pressure in the third water passage cavity 02, the second control rod 10 will be in a position far from the Hall element, and the water switch valve 57 will be in the powered-on state until the water pressure at the second water outlet 12 is greater than the water pressure in the second water passage cavity 38 inside the three-way return valve 53. The water at the second water outlet 12 is transported to the three-way return valve 53 through the return pipe 61, so as to relieve the pressure at the water production end 39 of the reverse osmosis membrane module 55. Since the water flow switch valve 57 is in the powered-on state, the reverse osmosis membrane module 55 will continue to produce water. In this way, the water pressure in the third water passage cavity 02 is relatively stable, and the position of the second control rod 10 will not change greatly downward. Therefore, the water flow switch valve 57 will not start and stop frequently even under high pressure.

[0047] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Based on the technical essence of the present invention, any simple modifications, equivalent replacements, and improvements made to the above embodiments within the spirit and principles of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A drinking water machine system with a reflux pressure relief function, comprising a filtration unit (51), a booster pump (54), a reverse osmosis membrane module (55), and a drinking water device that are connected in sequence, characterized in that, A three-way return valve (53) is provided on the water path where the booster pump (54) is connected to the filtration unit (51). A water flow switch valve (57) is provided at the water production end (39) of the reverse osmosis membrane module (55). A return pipe (61) connected to the three-way return 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 converges 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 module (55) is built up to be greater than the water pressure at the water outlet end of the three-way return valve (53), the water at the water production end (39) is transported through the return pipe (61) to the three-way return valve (53) to relieve the pressure at the water production end (39) of the reverse osmosis membrane module (55) to avoid frequent startup of the water flow switch valve (57), and then is transported to the reverse osmosis membrane module (55) by the booster pump (54).

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

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

4. A water dispenser system with a reflux pressure relief function according to claim 1, characterized in that, 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). A first water inlet (24) connected to the inlet electromagnetic valve (52) and a first water outlet (40) connected to the booster pump (54) are provided on the first valve body (23). A pressure relief port (32) connected to the return pipe (61) is provided on the pressure relief valve seat (31). A water sealing sleeve ring (29) and a pressure relief component for controlling the sealing or conduction of the water path at the water sealing sleeve ring (29) are formed on the water path where the pressure relief port (32) is connected to the first water outlet (40).

5. The water dispenser system with a reflux pressure relief function according to claim 4, wherein, The pressure relief component includes a first sealing 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 sealing head (28) and presses the first sealing head (28) against the water sealing sleeve 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 sleeve 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 sleeve ring (29) to be connected, otherwise it is sealed.

6. The water dispenser system with a 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 cavity (42) communicating with the first water inlet (24) is formed between the base (44) and the first valve body (23). A second water passage cavity (38) communicating with 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 where the first water passage cavity (42) communicates with the second water passage cavity (38).

7. The water dispenser system with a reflux pressure relief function according to claim 6, characterized in that, 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 at the top of the first valve body (23). A first air hole (33) communicating with the atmosphere is provided on the side of the first valve cover (34). A first atmosphere cavity (36) communicating with 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 at the upper end of the first control rod (43). A current 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 regulating the water volume between the first water inlet (24) and the first water outlet (40) under the combined action of the air pressure in the first atmosphere cavity (36), the pressure in the second water passage cavity (38), and the first return spring (35).

8. A water dispenser system with a reflux pressure relief function according to claim 1, characterized in that, 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). A second water outlet (12) and a third water outlet (14) respectively communicating with a normal temperature faucet (47) and a heating module (60) are provided at the upper end of the second valve cover (11). A second water inlet (01) connected to the water production end (39) of the reverse osmosis membrane module (55) is provided at the lower end of the second valve body (03). A Hall element (20) is provided on the side of the second valve body (03). A control component for controlling the Hall element (20) to be powered on or off is provided on the water path where the second water inlet (01) communicates with the second water outlet (12).

9. A water dispenser system with a reflux pressure relief function according to claim 8, characterized in that, The control component 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) communicating with the atmosphere is provided on the side of the second valve cover (11). A second atmosphere chamber (17) communicating with 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) communicating with 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 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). A fourth sealing ring (22) is circumferentially embedded in the second end cap (04). A water passing groove (05) is provided on the side wall of the third water passage chamber (02). A fourth water passage chamber (16) communicating with the second water outlet (12) is provided inside the second control rod (10). A third water hole (07) for connecting the water passing groove (05) and the fourth water passage chamber (16) is provided at the lower end of the side wall of the second control rod (10). A fifth sealing ring (19) is provided circumferentially on the second control rod (10). A pressing plate is provided circumferentially at 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 chamber (13) is formed between the pressure-sensitive diaphragm (15) and the second valve cover (11). A fourth water hole (58) for connecting the pressure-sensitive chamber (13) and the fourth water passage chamber (16) is provided on the side wall at the upper end of the second control rod (10). A fifth water hole (49) for connecting the pressure-sensitive chamber (13) and the third water outlet (14) is provided on the second valve cover (11). The upper end of the second control rod (10) is fixedly connected to the middle part of the pressure-sensitive diaphragm (15). 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 combined action of the water pressure in the pressure-sensitive chamber (13), the air pressure in the second atmosphere 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.

10. A water dispenser (48) system with a reflux pressure relief function according to claim 9, characterized in that, A water sealing component for controlling the on-off of the water path by the water pressure of the fourth water passing cavity (16) is provided at the second water outlet (12). The water sealing component includes a plug (65), a third return spring (67) and a water sealing convex ring (64). A sixth water hole (66) communicating with the fourth water passing cavity (16) is provided in the middle of the water sealing convex ring (64). One end of the third return spring (67) acts on the inner wall of the second valve cover (11), and the other end acts on the plug (65) and presses the plug (65) against the water sealing convex ring (64). The plug (65) controls the connection or blockage of the water path at the water sealing convex ring (64) under the combined action of the water pressure in the fourth water passing cavity (16) and the elastic force of the third return spring (67).

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