Full-automatic maintenance-free water purification constant-pressure water supply system

Abstract

The invention discloses a full-automatic maintenance-free water purification constant-pressure water supply system, and relates to the technical field of constant-pressure water supply, the full-automatic maintenance-free water purification constant-pressure water supply system comprises a pressure tower, an ultraviolet sterilizer, an ultrafiltration water purifier, a Venturi jet pipe, an auxiliary pressure tank and a system control box, the upper end of the ultrafiltration water purifier is connected with a water inlet of the ultraviolet sterilizer through a water pipe, a water outlet of the ultraviolet sterilizer is connected with a water inlet of the pressure tower through a water pipe, and a water outlet of the pressure tower is connected with a water outlet pipe; a backwash pipe is arranged at one end, close to the pressure tower, of the water outlet pipe, and the other end of the backwash pipe is connected with the water outlet end of the ultraviolet sterilizer. The starting frequency of the water pump is reduced through the automatic exhausting and air supplementing function. The water-gas mixed liquid of the Venturi jet pipe is used for forward flushing the water purification filter element. Purified clean water is used for reversely flushing the filter element, pollutants clamped in micropores of the filter element are reversely flushed out, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of constant pressure water supply, and in particular relates to a full-automatic maintenance-free water purification constant pressure water supply system. Background Art

[0002] The purified water constant pressure supply system is an integrated water supply device that combines water purification with constant water pressure control. It purifies water through processes such as filtration, adsorption, and membrane separation, and utilizes technologies such as variable frequency speed regulation and air pressure stabilization to maintain stable outlet water pressure, ensuring that users receive drinking water that meets water quality standards and maintains constant water pressure. Its core functions include: water purification: removing suspended matter, colloids, microorganisms, heavy metals, and organic pollutants from water to meet the "National Drinking Water Quality Standard" (GB 5749-2022); constant pressure control: automatically adjusting the pump speed or starting and stopping the pump when the water flow rate changes, keeping outlet water pressure fluctuations within ±0.05MPa.

[0003] Traditional constant pressure water supply system:

[0004] 1. The disadvantage of high-level water tank is insufficient pressure, which becomes more obvious as the water supply goes up.

[0005] 2. Ordinary pressure tank water supply has the following disadvantages: small air compression ratio, small energy storage effect, high water pump start-up frequency, no energy saving, and the pressure tank is too large. Because the air is slightly dissolved in the water, it is exhausted as the water usage time increases, until the energy storage and pressure stabilization function is lost.

[0006] 3. Variable frequency constant pressure water pump. Although it can save energy, the water inlet needs to have no negative pressure, the maintenance cost is high, the inverter is easily damaged by lightning, the maintenance personnel must be highly professional, the inverter is difficult to match, and if groundwater is used, a set of pumping equipment is also required.

[0007] 4. Although the performance of diaphragm pressure tanks and airbag pressure tanks is better than that of ordinary pressure tanks, the production cost is high and the diaphragm airbag is prone to aging and damage.

[0008] Based on this, the present application designs a fully automatic, maintenance-free, water purification and constant pressure water supply system that can automatically detect the degree of pollution and perform forward and reverse flushing and sewage discharge. Summary of the Invention

[0009] The present invention provides a fully automatic maintenance-free water purification constant pressure water supply system, the water supply equipment of which uses only one water pump as the power source. The constant pressure energy storage effect is better than that of a diaphragm airbag pressure tank, and the production cost is low. The energy-saving effect is similar to that of a variable frequency constant pressure water pump. Under low-flow water supply conditions, it is even better than a variable frequency constant pressure pump. The pressure tank has a large compression ratio and can automatically restore air leaked due to power outages to maintain a normal compression ratio.

[0010] The present invention is realized by the following technical scheme: a fully automatic maintenance-free water purification constant pressure water supply system, including a pressure tower, an ultraviolet sterilizer, an ultrafiltration water purifier, a venturi jet tube, a secondary pressure tank and a system control box,

[0011] One end of the ultrafiltration water purifier is connected to a water inlet pipe, the upper end of the ultrafiltration water purifier is connected to the water inlet of the ultraviolet sterilizer through a water pipe, the water outlet of the ultraviolet sterilizer is connected to the water inlet of the pressure tower through a water pipe, the water outlet of the pressure tower is connected to a water outlet pipe, and a valve is provided on the water outlet pipe; a backflush pipe is provided at one end of the water outlet pipe close to the pressure tower, and the other end of the backflush pipe is connected to the water outlet end of the ultraviolet sterilizer;

[0012] The lower end of the ultrafiltration water purifier is also provided with a sewage pipe, and the sewage pipe is provided with a sewage electronic valve;

[0013] An air supply pipe is provided on the upper part of the side wall of the pressure tower, the end of the air supply pipe is connected to a tee, the lower end of the tee is provided with an automatic air supply valve, and the upper end of the tee is provided with a pressure controller; an exhaust pipe is provided in the middle part of the side wall of the pressure tower, and an automatic exhaust valve is provided on the exhaust pipe;

[0014] The venturi jet tube and the auxiliary pressure tank are both connected to the water inlet pipe, the venturi jet tube is close to one end of the ultrafiltration water purifier, and the venturi jet tube is provided with an automatic air supply valve 2, the auxiliary pressure tank is close to the water inlet end, and the auxiliary pressure tank is provided with an automatic air supply valve 3;

[0015] An outlet pipe is provided at one end of the water inlet pipe close to the ultrafiltration water purifier, and two ports are provided at the other end of the outlet pipe, which are respectively connected to the first electric contact pressure gauge and the second electric contact pressure gauge;

[0016] The system control box is electrically connected to the pressure controller, the ultraviolet sterilizer, the sewage electronic valve, the first electric contact pressure gauge, and the second electric contact pressure gauge, and controls their operations.

[0017] Preferably, the water inlet end of the water inlet pipe is connected to a submersible electric pump, a float protection switch is provided on the outer wall of the submersible electric pump, and the submersible electric pump and the float protection switch are both electrically connected to a system control box. The float protection switch protects the submersible electric pump when the well is short of water.

[0018] Preferably, the water inlet end of the water inlet pipe is connected to a tap water pipe.

[0019] Preferably, the pressure controller is connected to the tee of the air supply pipe via a pressure buffer rod; the first and second electric contact pressure gauges are also connected to the outlet pipe via pressure buffer rods. The pressure buffer rods can reduce the impact of pressure fluctuations on the instruments.

[0020] Preferably, the water inlet pipe is provided with a one-way check valve 1 between the venturi jet pipe and the auxiliary pressure tank, the water outlet pipe of the ultraviolet sterilizer is provided with a one-way check valve 2 near the water inlet end of the pressure tower, and the backflush pipe is provided with a one-way check valve 3.

[0021] Preferably, the water inlet pipe is located between the auxiliary pressure tank and the water inlet end and is provided with a buffer valve.

[0022] Preferably, the interior of the ultrafiltration water purifier is provided with a PP membrane, an activated carbon membrane (702), and an RO membrane in order from bottom to top. The PP membrane is made of PP cotton and mainly filters sediment; the activated carbon membrane is used to filter larger pollutants and adsorb chlorine in water; and the RO membrane is used to filter ions, small molecular organic matter, and microbial impurities in water.

[0023] A water guide plate is provided on the inner wall of the ultrafiltration water purifier, and the water guide plate is arranged in a spiral shape to increase the flow speed of water.

[0024] Preferably, it further comprises a mounting frame, and the purified water constant pressure water supply system is mounted on the mounting frame.

[0025] Preferably, the mounting frame is a rectangular frame formed by interconnecting a plurality of vertical tubes, horizontal tubes and longitudinal tubes, and the vertical tubes, horizontal tubes and longitudinal tubes are all square stainless steel tubes.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The present invention utilizes the automatic exhaust and air replenishment function to reduce the starting frequency of the water pump.

[0028] 2. The present invention utilizes the water-gas mixture of the venturi jet tube to flush the water purification filter element in a positive direction.

[0029] 3. The present invention utilizes purified clean water to reversely flush the filter element, thereby flushing out pollutants stuck in the micropores of the filter element, thereby increasing the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of a fully automatic maintenance-free water purification constant pressure water supply system;

[0031] Figure 2 It is a three-dimensional diagram of a fully automatic maintenance-free water purification constant pressure water supply system;

[0032] Figure 3 This is a rear perspective view of a fully automatic maintenance-free water purification and constant pressure water supply system;

[0033] Figure 4 This is the right side view of a fully automatic maintenance-free water purification constant pressure water supply system;

[0034] Figure 5This is the left view of a fully automatic maintenance-free water purification constant pressure water supply system;

[0035] Figure 6 This is a structural diagram of a mounting frame in a fully automatic, maintenance-free, water purification, and constant-pressure water supply system;

[0036] Figure 7 This is a structural diagram of an ultrafiltration water purifier in a fully automatic maintenance-free water purification and constant pressure water supply system;

[0037] Figure 8 This is a water supply flow chart for a fully automatic maintenance-free water purification constant pressure water supply system;

[0038] Figure 9 This is a flow chart of automatic air supply and exhaust for a fully automatic maintenance-free water purification constant pressure water supply system;

[0039] Figure 10 This is a forward flushing and sewage discharge flow chart of a fully automatic maintenance-free constant pressure water supply system;

[0040] Figure 11 This is a reverse flushing and sewage discharge flow chart of a fully automatic maintenance-free constant pressure water supply system;

[0041] Figure 12 This is a constant pressure control flow chart for a fully automatic maintenance-free water purification constant pressure water supply system;

[0042] Figure 13 This is a flow chart for water shortage protection control of a fully automatic maintenance-free water purification and constant pressure water supply system;

[0043] Figure 14 This is a flow chart for eliminating the water hammer effect of a fully automatic, maintenance-free, purified water constant pressure water supply system.

[0044] Numbers in the figure: 1. Pressure tower; 2. Automatic air supply valve 1; 3. Pressure buffer rod; 4. Pressure controller; 5. Automatic exhaust valve; 6. Ultraviolet sterilizer; 7. Ultrafiltration water purifier; 8. Electronic sewage valve; 9. One-way check valve 1; 10. Electric contact pressure gauge 1; 11. Electric contact pressure gauge 2; 12. Automatic air supply valve 2; 13. Auxiliary pressure tank; 14. Venturi jet tube; 15. Valve; 16. Submersible electric pump; 17. Float Protection switch; 18. System control box; 19. Buffer valve; 20. One-way check valve 2; 21. One-way check valve 3; 22. Automatic air supply valve 3; 23. Water inlet pipe; 24. Water outlet pipe; 25. Backwash pipe; 26. Drain pipe; 27. Outlet pipe; 28. Mounting frame; 281. Vertical pipe; 282. Horizontal pipe; 283. Vertical pipe; 701. PP membrane; 702. Activated carbon membrane; 703. RO membrane; 704. Water guide plate. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] Example 1

[0047] See also Figures 1-14 , a fully automatic maintenance-free water purification constant pressure water supply system, comprising a pressure tower 1, an ultraviolet sterilizer 6, an ultrafiltration water purifier 7, a venturi jet tube 14, an auxiliary pressure tank 13, a submersible electric pump 16 and a system control box 18;

[0048] The pressure tower 1 plays the role of stabilizing pressure and storing energy. When the submersible electric pump 16 stops working, water is maintained to be supplied to the pipeline. When the submersible electric pump 16 is working, if the water flow rate is less than the water supply flow rate of the submersible electric pump 16, the excess water is temporarily stored in the tower to reduce the system's loss of electric energy, that is, it plays the role of energy storage.

[0049] One end of the ultrafiltration water purifier 7 is connected to the water inlet pipe 23, and the upper end of the ultrafiltration water purifier 7 is connected to the water inlet of the ultraviolet sterilizer 6 through a water pipe. The ultrafiltration water purifier 7 is used to filter out mud, algae, organic impurities, colloids, and large molecular bacteria with an accuracy of more than 0.01 microns to ensure clean water quality.

[0050] The water outlet of the ultraviolet sterilizer 6 is connected to the water inlet of the pressure tower 1 through a water pipe. The ultraviolet sterilizer 6 is used to disinfect and sterilize the purified water to ensure water safety. The water outlet of the pressure tower 1 is connected to the water outlet pipe 24, and the water outlet pipe 24 is provided with a valve 15. The end of the water outlet pipe 24 close to the pressure tower 1 is provided with a backflush pipe 25, and the other end of the backflush pipe 25 is connected to the water outlet of the ultraviolet sterilizer 6.

[0051] The lower end of the ultrafiltration water purifier 7 is also provided with a sewage pipe 26, and the sewage pipe 26 is provided with a sewage electronic valve 8, which cooperates with the control circuit to flush and discharge sewage from the water purifier;

[0052] An air supply pipe is provided on the upper part of the side wall of the pressure tower 1, the end of the air supply pipe is connected to a tee, the lower port of the tee is provided with an automatic air supply valve 2, and the upper port of the tee is provided with a pressure controller 4; the function of the automatic air supply valve 2 is to prevent the pressure tower 1 from being sucked and deformed in the event of a power outage when the pressure tower 1 is installed at a high place, and it can be omitted when installed on the ground.

[0053] An exhaust pipe is provided in the middle of the side wall of the pressure tower 1, and an automatic exhaust valve 5 is provided on the exhaust pipe; after multiple air replenishments by the automatic air replenishment system, more and more air will be discharged in the pressure tower 1. If part of the air is not discharged in time, the air will be discharged from the faucet and other water outlets, affecting the water experience. When the water level is lower than point A, the air will be discharged from the exhaust valve 5. When it is higher than point A, the exhaust valve 5 will not exhaust or drain water.

[0054] The venturi jet tube 14 and the auxiliary pressure tank 13 are both connected to the water inlet pipe 23. The venturi jet tube 14 is close to one end of the ultrafiltration water purifier 7, and the venturi jet tube 14 is provided with an automatic air supply valve 2 12. The auxiliary pressure tank 13 is close to the water inlet end, and the auxiliary pressure tank 13 is provided with an automatic air supply valve 3 22.

[0055] The venturi jet tube 14 and the automatic air supply valve 12 supply air to the pressure tower 1 to make up for the air loss in the pressure tower 1, so as to reduce the starting frequency of the submersible electric pump 16 and increase the reliability and stability of the water supply system. When the sewage system is working, the pressure difference between the inlet and outlet ends of the venturi increases to generate negative pressure in the air chamber part, and the water-gas mixture generated by the venturi jet tube 14 performs a deep positive flush on the water purifier.

[0056] The auxiliary pressure tank 13 contains a certain amount of pressurized gas. When the submersible pump 16 stops working, this pressure does not disappear immediately, but will have a certain offsetting effect on the pressure at point B, thereby eliminating the water hammer impact of the water pressure at point B on the one-way check valve, preventing damage to the check valve and increasing system reliability.

[0057] An outlet pipe 27 is provided at one end of the water inlet pipe 23 close to the ultrafiltration water purifier 7, and two ports are provided at the other end of the outlet pipe 27, which are respectively connected to electric contact pressure gauge 10 and electric contact pressure gauge 2 11, for detecting the degree of contamination of the ultrafiltration water purifier 7, cooperating with the control box circuit to save the contamination signal and control the solenoid valve 8 to discharge sewage.

[0058] The system control box 18 is electrically connected to the pressure controller 4, the ultraviolet sterilizer 6, the sewage electronic valve 8, the electric contact pressure gauge 1 10, and the electric contact pressure gauge 2 11, respectively, to accurately control the constant pressure, purification, forward and reverse flushing and sewage discharge, and water shortage protection of the entire system.

[0059] The water inlet end of the water inlet pipe 23 is connected to a submersible electric pump 16. A float protection switch 17 is provided on the outer wall of the submersible electric pump 16. The submersible electric pump 16 and the float protection switch 17 are both electrically connected to a system control box 18. The float protection switch 17 protects the submersible electric pump 16 when the well is short of water.

[0060] The pressure controller 4 is connected to the tee of the air supply pipe through the pressure buffer rod 3. The electric contact pressure gauge 10 and the electric contact pressure gauge 2 11 are also connected to the outlet pipe 27 through the pressure buffer rod 3. The pressure buffer rod 3 can reduce the impact of pressure fluctuations on the instrument.

[0061] The water inlet pipe 23, located between the Venturi jet tube 14 and the auxiliary pressure tank 13, is equipped with a one-way check valve 9. The outlet pipe of the UV sterilizer 6, near the water inlet of the pressure tower 1, is equipped with a two-way check valve 20. The backflush pipe 25 is equipped with a three-way check valve 21 to prevent the water in the pressure tower 1 from flowing back into the well when the submersible electric pump 16 stops working. A buffer valve 19 is installed between the auxiliary pressure tank 13 and the water inlet end of the water inlet pipe 23.

[0062] The interior of the ultrafiltration water purifier 7 is provided with a PP membrane 701, an activated carbon membrane 702, and an RO membrane 703 from bottom to top. The PP membrane 701 is made of PP cotton and mainly filters sediment; the activated carbon membrane 702 is used to filter larger pollutants and absorb chlorine in the water; the RO membrane 703 is used to filter ions, small molecular organic matter, and microbial impurities in the water;

[0063] Ultrafiltration water purifier 7 is equipped with a spiral-shaped water guide plate 704 on its inner wall to increase the flow rate of water. When water flows from the water inlet pipe into ultrafiltration water purifier 7, the water flow is guided by water guide plate 704 to form a rotating water column, thereby increasing the flow rate and avoiding the problem of reduced water flow rate in existing water purifiers after installing a filter membrane. During backwashing, water guide plate 704 can form a rotating water column to enhance the backwash effect.

[0064] It also includes a mounting frame 28, on which the purified water constant pressure supply system is installed; the mounting frame 28 is a rectangular frame formed by a plurality of vertical pipes 281, horizontal pipes 282 and longitudinal pipes 283 connected to each other, and the vertical pipes 281, horizontal pipes 282 and longitudinal pipes 283 are all square stainless steel pipes.

[0065] The working principle of this embodiment is as follows:

[0066] 1. When the water is used in a small flow continuous condition

[0067] If the water purification capacity exceeds the water consumption, and the electric contact pressure gauge 10 detects a set pressure value (slightly higher than normal water purification), the control box's related circuits store this signal. Wait until the pump stops and the pressure in pressure tower 1 drops to a value between the maximum and minimum pressures (this pressure value is set by the electric contact pressure gauge 10). The system control box 18 outputs a drain signal, causing the drain solenoid valve 8 to operate, and the drain system to reverse flush. The pressure in pressure tower 1 drops rapidly, and the submersible electric pump 16 starts, immediately switching the drain system to forward flushing until the set flushing time is reached.

[0068] 2. When the water flow is intermittent at a small flow rate, the sewage system works in the same way as 1.

[0069] 3. When water is used in intermittent conditions with large flow

[0070] If the water purification capacity exceeds the water consumption per unit time, the sewage system operates in the same manner as in step 1. If the water purification capacity is less than the water consumption per unit time, the submersible electric pump 16 will not stop operating. When the pressure signal value detected by the electric contact pressure gauge 2 11 is slightly higher than the pressure signal value stored by the electric contact pressure gauge 10 (this pressure value is set by the electric contact pressure gauge 2 11), the control circuit immediately activates the sewage solenoid valve 8, and the sewage system performs a forward flush until the set time.

[0071] 4. When the water flow is large and continuous

[0072] The water purification capacity of the ultrafiltration water purifier 7 is less than the water consumption, and the submersible electric pump 16 does not stop working. When the electric contact pressure gauge 2 11 detects a pressure signal value slightly higher than the pressure signal value stored in the electric contact pressure gauge 10 (this pressure value is set by the electric contact pressure gauge 2 11), the control circuit immediately starts the sewage solenoid valve 8, and the sewage system is forward flushed until the set time.

[0073] Working principle of water purifier flushing and sewage discharge

[0074] The forward and reverse flushing process lasts a total of 30 seconds. During the reverse flush, the filter element membrane fibers expand due to the 0.3-0.4 MPa pressure between the inner and outer walls. This causes the membrane fibers to expand, enlarging the micropores in the membrane walls and making it easier to flush out contaminants trapped within them. The first 10 seconds of the entire flushing period are dedicated to pure reverse flushing, while the last 20 seconds are a combination of forward and reverse flushing. Due to the expansion of the membrane fibers, the sludge on the outer walls of the membrane fibers becomes loose, reducing its adhesion. During the forward flush, the high-pressure bubbles in the water-gas mixture rush into the pressureless, enclosed water purifier. The shock wave generated by the bursting bubbles has a strong scouring effect on the loosened sludge on the outer walls of the membrane fibers, significantly extending the service life of the filter element.

[0075] like Figure 8 As shown, the water supply process of the purified water constant pressure water supply system is: the submersible electric pump 16 pumps water, passes through the buffer valve 19 and the venturi jet tube 14, to the ultrafiltration water purifier 7, then to the ultraviolet sterilizer 6, and then passes through the one-way check valve 20, enters the pressure tower 1, and finally is discharged from the outlet pipe 24 through the valve 15.

[0076] like Figure 9 As shown, the automatic air supply and exhaust process of the water purification constant pressure water supply system is as follows: the air is supplied from the automatic air supply valve 3 22, passes through the auxiliary pressure tank 13, then passes through the buffer valve 19, the one-way check valve 1 9 and the Venturi jet tube 14, reaches the ultrafiltration water purifier 7, then to the ultraviolet sterilizer 6, then enters the pressure tower 1, and finally is discharged from the automatic exhaust valve 5.

[0077] like Figure 10As shown, the forward flushing and sewage discharge process of the purified water constant pressure water supply system is: the submersible electric pump 16 pumps water, passes through the buffer valve 19 and the Venturi jet tube 14, and the automatic air supply valve 12 is used to supply air at the same time, and the steam-water mixture enters the ultrafiltration water purifier 7 and is then discharged through the sewage electronic valve 8.

[0078] like Figure 11 As shown, the reverse flushing and sewage discharge process of the purified water constant pressure water supply system is: the water in the pressure tower 1 passes through the one-way check valve 3 21 to the ultraviolet sterilizer 6, then to the ultrafiltration water purifier 7, and finally discharged from the sewage electronic valve 8.

[0079] like Figure 12 As shown, the constant pressure control process of the purified water constant pressure water supply system is as follows: the pressure controller 4 detects a signal and transmits it to the system control box 18, which controls the submersible electric pump 16 to work.

[0080] like Figure 13 As shown, the water shortage protection control process of the water purification constant pressure water supply system is as follows: the float protection switch 17 detects the water shortage signal and transmits it to the system control box 18, and the system control box 18 controls the submersible electric pump 16 to work.

[0081] like Figure 14 As shown, the process of eliminating the water hammer effect of the purified water constant pressure water supply system is as follows: when the pump is stopped, the pressure in the auxiliary pressure tank 13 is transmitted along the pipeline toward the one-way check valve 9 and the submersible electric pump 16, which will have a certain offsetting effect on the pressure at point B, thereby eliminating the water hammer impact of the water pressure at point B on the one-way check valve 9, preventing damage to the check valve, and increasing the reliability of the system.

[0082] Example 2

[0083] A fully automatic maintenance-free water purification constant pressure water supply system, comprising a pressure tower 1, an ultraviolet sterilizer 6, an ultrafiltration water purifier 7, a venturi jet tube 14, an auxiliary pressure tank 13 and a system control box 18,

[0084] One end of the ultrafiltration water purifier 7 is connected to the water inlet pipe 23, the upper end of the ultrafiltration water purifier 7 is connected to the water inlet of the ultraviolet sterilizer 6 through a water pipe, the water outlet of the ultraviolet sterilizer 6 is connected to the water inlet of the pressure tower 1 through a water pipe, the water outlet of the pressure tower 1 is connected to the water outlet pipe 24, and the water outlet pipe 24 is provided with a valve 15; the end of the water outlet pipe 24 close to the pressure tower 1 is provided with a backflush pipe 25, and the other end of the backflush pipe 25 is connected to the water outlet end of the ultraviolet sterilizer 6;

[0085] The lower end of the ultrafiltration water purifier 7 is also provided with a sewage pipe 26, and the sewage pipe 26 is provided with a sewage electronic valve 8;

[0086] An air supply pipe is provided at the upper part of the side wall of the pressure tower 1, the end of which is connected to a tee, the lower end of which is provided with an automatic air supply valve 2, and the upper end of which is provided with a pressure controller 4; an exhaust pipe is provided at the middle part of the side wall of the pressure tower 1, and an automatic exhaust valve 5 is provided on the exhaust pipe;

[0087] The venturi jet tube 14 and the auxiliary pressure tank 13 are both connected to the water inlet pipe 23. The venturi jet tube 14 is close to one end of the ultrafiltration water purifier 7, and the venturi jet tube 14 is provided with an automatic air supply valve 2 12. The auxiliary pressure tank 13 is close to the water inlet end, and the auxiliary pressure tank 13 is provided with an automatic air supply valve 3 22.

[0088] An outlet pipe 27 is provided at one end of the water inlet pipe 23 close to the ultrafiltration water purifier 7, and two ports are provided at the other end of the outlet pipe 27, which are connected to the electric contact pressure gauge 10 and the electric contact pressure gauge 2 11 respectively;

[0089] The system control box 18 is electrically connected to the pressure controller 4, the ultraviolet sterilizer 6, the sewage electronic valve 8, the electric contact pressure gauge 1 10, and the electric contact pressure gauge 2 11, and controls their operations.

[0090] The water inlet end of the water inlet pipe 23 is connected to the tap water pipe.

[0091] The effectiveness of the present invention is:

[0092] The present invention utilizes automatic exhaust and air replenishment functions to reduce the frequency of water pump startup. The water-air mixture in the Venturi jet tube 14 is used to forward flush the water purification filter element. Purified water is then used to reversely flush the filter element, flushing out contaminants trapped in the filter element's micropores and extending the filter element's service life.

[0093] The constant pressure water supply of this application provides a good water experience. It is maintenance-free, worry-free and labor-saving. No noise or extremely low noise, and environmentally friendly. It has a water shortage fault protection function, which is safe and secure. The startup frequency is low, energy-saving and efficient. It automatically detects the degree of contamination of the water purifier filter element, uses the air resistance principle, and automatically flushes forward, and uses the purified clean water to automatically flush in reverse, which has a better flushing effect and effectively extends the life of the filter element. It is anti-freeze and not afraid of bad weather. The water purification accuracy is high, with an accuracy of 0.01 microns. It can be used in parallel with tap water. When the well water is short of water, it automatically switches to tap water. When the well water rises to a limited position, it automatically switches to well water without manual intervention. It occupies a small area and is flexible and convenient to install. It can be installed upstairs and downstairs, indoors and outdoors. Ultraviolet sterilization is safe and hygienic. When the well water contains a lot of sand, the sand removal function can be added. When the well water hardness is high, the softening function can be added.

[0094] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0095] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic maintenance-free water purification constant pressure water supply system, characterized by: It includes a pressure tower (1), an ultraviolet sterilizer (6), an ultrafiltration water purifier (7), a venturi jet tube (14), a secondary pressure tank (13) and a system control box (18); One end of the ultrafiltration water purifier (7) is connected to a water inlet pipe (23), the upper end of the ultrafiltration water purifier (7) is connected to the water inlet of the ultraviolet sterilizer (6) through a water pipe, the water outlet of the ultraviolet sterilizer (6) is connected to the water inlet of the pressure tower (1) through a water pipe, the water outlet of the pressure tower (1) is connected to a water outlet pipe (24), and a valve (15) is provided on the water outlet pipe (24); a backwash pipe (25) is provided at one end of the water outlet pipe (24) close to the pressure tower (1), and the other end of the backwash pipe (25) is connected to the water outlet end of the ultraviolet sterilizer (6); The lower end of the ultrafiltration water purifier (7) is also provided with a sewage pipe (26), and the sewage pipe (26) is provided with a sewage electronic valve (8); An air supply pipe is provided on the upper portion of the side wall of the pressure tower (1), the end of the air supply pipe is connected to a tee, the lower end of the tee is provided with an automatic air supply valve (2), and the upper end of the tee is provided with a pressure controller (4); an exhaust pipe is provided in the middle portion of the side wall of the pressure tower (1), and an automatic exhaust valve (5) is provided on the exhaust pipe; The venturi jet tube (14) and the auxiliary pressure tank (13) are both connected to the water inlet pipe (23), the venturi jet tube (14) is close to one end of the ultrafiltration water purifier (7), and the venturi jet tube (14) is provided with an automatic air supply valve 2 (12), and the auxiliary pressure tank (13) is close to the water inlet end, and the auxiliary pressure tank (13) is provided with an automatic air supply valve 3 (22); An outlet pipe (27) is provided at one end of the water inlet pipe (23) close to the ultrafiltration water purifier (7), and two ports are provided at the other end of the outlet pipe (27), which are respectively connected to an electric contact pressure gauge 1 (10) and an electric contact pressure gauge 2 (11); The system control box (18) is electrically connected to the pressure controller (4), the ultraviolet sterilizer (6), the sewage discharge electronic valve (8), the electric contact pressure gauge 1 (10), and the electric contact pressure gauge 2 (11), and controls their operations.

2. A fully automatic maintenance-free water purification constant pressure water supply system according to claim 1, characterized in that: The water inlet end of the water inlet pipe (23) is connected to a submersible electric pump (16), a float protection switch (17) is provided on the outer wall of the submersible electric pump (16), and the submersible electric pump (16) and the float protection switch (17) are both electrically connected to a system control box (18).

3. A fully automatic maintenance-free water purification constant pressure water supply system according to claim 1, characterized in that: The water inlet end of the water inlet pipe (23) is connected to the tap water pipeline.

4. A fully automatic maintenance-free water purification constant pressure water supply system according to claim 2 or 3, characterized in that: The pressure controller (4) is connected to the tee of the air supply pipe via a pressure buffer rod (3); the electric contact pressure gauge 1 (10) and the electric contact pressure gauge 2 (11) are also connected to the outlet pipe (27) via the pressure buffer rod (3).

5. A fully automatic maintenance-free water purification constant pressure water supply system according to claim 4, characterized in that: The water inlet pipe (23) is provided with a one-way check valve (9) between the venturi jet pipe (14) and the auxiliary pressure tank (13); the water outlet pipe of the ultraviolet sterilizer (6) is provided with a one-way check valve (20) near the water inlet end of the pressure tower (1); and the backwash pipe (25) is provided with a one-way check valve (21).

6. A fully automatic maintenance-free water purification constant pressure water supply system according to claim 5, characterized in that: The water inlet pipe (23) is located between the auxiliary pressure tank (13) and the water inlet end is provided with a buffer valve (19).

7. The fully automatic maintenance-free water purification constant pressure water supply system according to claim 1, characterized in that: The interior of the ultrafiltration water purifier (7) is provided with a PP membrane (701), an activated carbon membrane (702), and an RO membrane (703) in order from bottom to top. The PP membrane (701) is made of PP cotton and mainly filters mud and sand; the activated carbon membrane (702) is used to filter larger pollutants and absorb chlorine in water; and the RO membrane (703) is used to filter ions, small molecular organic matter, and microbial impurities in water. A water guide plate (704) is provided on the inner wall of the ultrafiltration water purifier (7), and the water guide plate (704) is arranged in a spiral shape to increase the flow rate of water.

8. The fully automatic maintenance-free water purification constant pressure water supply system according to claim 1, characterized in that: It also includes a mounting frame (28), and the purified water constant pressure water supply system is installed on the mounting frame (28).

9. A fully automatic maintenance-free water purification constant pressure water supply system according to claim 8, characterized in that: The mounting frame (28) is a rectangular frame formed by interconnecting a plurality of vertical tubes (281), horizontal tubes (282) and longitudinal tubes (283), wherein the vertical tubes (281), horizontal tubes (282) and longitudinal tubes (283) are all square stainless steel tubes.

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