WO2007140713A1

WO2007140713A1 - a purification apparatus and applied system

Info

Publication number: WO2007140713A1
Application number: PCT/CN2007/001746
Authority: WO
Inventors: Keqing Yang
Original assignee: Keqing Yang
Priority date: 2006-06-01
Filing date: 2007-05-31
Publication date: 2007-12-13
Also published as: CN1868905A

Abstract

A water purification apparatus comprises a filter (9) and a sealed water tank (11) connecting with outlet of the filter. The water tank is sterile with a flexible diaphragm (3) disposed inside. The chamber is divided into an upper shell (1) disposed with an open communicating with the atmosphere and a lower shell (2) disposed with a water inlet and outlet (4) communicating with the pipe by the flexible diaphragm. An applied system of water purification apparatus comprises a water pretreatment assembly, a solenoid valve, a pressure pump, a filter and a sterile water tank.

Description

Water purification device and application system

ίTechnical field]

The present invention relates to a water treatment device, and more particularly to a water purification device that purifies water by a combination of a sterile water tank and a water filter to enable a user to obtain a sanitary, safe and direct drinking water, and an application system including the above water purification device. .

【Background technique】

In the prior art, the direct drinking water treatment system is directly connected with the municipal water pipe, and the water source is filtered and purified by reverse osmosis (or sodium filtration) to enter the water tank reserve to provide drinking water for the daily life of the people. However, the current use of this

The water tank generally adopts a pressure tank, and a pressure switch is arranged above the pressure tank, and the pressure water is controlled to enter and exit the pressure barrel through the pressure switch. However, the pressure barrel has the following disadvantages: First, the pressure barrel is generally made of elastic rubber material, the product after the finished product has an odor, the purified water is polluted twice, and the purified water needs to be purified again with activated carbon; second, elastic rubber Easy to aging and deformation, short life; Third, there must be a part of the cavity in the pressure tank, the effective volume is small; 笫4, because the pressure storage process of the pressure tank and the pressure of the new and old pressure tank are not constant, the working pressure of the whole filtration system The difference is not constant, the working condition is more complicated (affecting the wastewater ratio); Fifth, because the reverse osmosis membrane or the nanofiltration membrane is afraid of back pressure, it is easy to damage the reverse osmosis membrane or the nanofiltration membrane; sixth, using the pressure tank also makes The pressure difference between the reverse osmosis membrane or the nanofiltration membrane is reduced, which affects the filtration speed. Seventh, the pressure tank cannot completely eject the purified water, which affects both the effective volume and the long storage time of the water. Eighth, the pressure tank is a pressure vessel. , higher cost. Therefore, the prior art needs improvement.

[Summary of the Invention]

SUMMARY OF THE INVENTION The present invention is directed to providing a combination of a sterile water tank and a water filter to overcome the above-mentioned drawbacks of the pressure tank in view of the above-mentioned deficiencies in the water treatment system currently on the market.

The invention also provides the use of the above water purification device in an actual water treatment system.

In order to achieve the above object, the technical solution proposed by the present invention is:

A water purifying device comprising a water filter capable of purifying water and a water tank connected to the water outlet of the water filter, wherein: the water tank is a sterile water tank, which is a container with a flexible diaphragm inside. The flexible diaphragm divides the container into upper and lower casings, wherein the upper casing is provided with an opening communicating with the atmosphere, and the lower casing is opened Inlet and outlet connected to the waterway.

The flexible diaphragm is disposed in a middle portion of the sterile water tank, and divides the container into an air chamber and a water chamber, the cross section of the flexible diaphragm is the same as the cross-sectional shape and size of the inner and inner chamber walls, and the flexible diaphragm can Fully conforming to the inner cavity wall of the upper casing and the inner cavity wall of the lower casing;

The upper casing is provided with a contact type electric switch that can be in contact with the flexible film, and the contact type electric switch is a micro switch or a reed switch;

The water filter is a reverse osmosis water filter or a sodium water filter;

The pressure regulating valve is further provided on the water passage between the water inlet of the sterile water tank and the water outlet of the water filter, and the pressure resistance value of the sterile water tank is higher than the pressure value of the pressure limiting valve.

According to the above water purifying device technical solution, the present invention also provides an application system including the above water purifying device, which comprises a water filter capable of purifying water and a water tank connected to the water outlet of the water filter, The water tank is a sterile water tank, and the water outlet is connected to the user end; the water inlet passage of the water filter is provided with a water pretreatment component, and the water pretreatment component inlet is connected with the municipal water network, and the water inlet is installed There is a water inlet solenoid valve, and the water pretreatment component outlet is connected to the water filter via a booster pump; the sterile water tank is provided with a switch electrically connected to the booster pump, and the water inlet solenoid valve and the booster pump are connected The pipeline is provided with a low-pressure switch; the water filter outlet is further connected with ^: a waste water outlet passage, and the passage is provided with a flush valve, a wastewater proportional device or a multifunctional waste water valve.

a P pressure valve is further disposed on the water passage between the water inlet of the sterile water tank and the water outlet of the water filter, and the pressure resistance value of the sterile water tank is higher than the pressure limit value of the pressure limiting valve;

An activated carbon water filter is further disposed between the sterile water tank and the user end;

The pipeline connecting the sterile water tank and the user end is provided with a transfer pump, or a combination of a transfer pump and a check valve, or a combination of a transfer pump, a check valve and a pressure switch, wherein the pressure switch is located The pressure value of the water outlet pipe of the water pump is smaller than the water pressure of the pump;

The water pretreatment component is connected with the municipal water network, and is further provided with a pressure limiting valve and a water container, wherein the pressure limiting value of the pressure limiting valve is smaller than the 7j pressure of the boosting pump; The water outlet is connected with the water pretreatment assembly; the waste water outlet channel connected to the water filter is connected to the water container, and is connected to the water passage between the waste water passage, the water container, or the water container and the water pretreatment assembly. There is one or more sanitary faucets, and a wastewater reuse valve is provided on the waste water outlet passage.

The invention has the following technical effects: 1) A water purifying device provided by the present invention, the flexible diaphragm in the sterile water tank can divide the container of the sterile water tank into an air chamber and a water chamber, so that the purified water does not enter the water chamber. Direct contact with the atmosphere, so there will be no secondary pollution. At the same time, the contact type electric switch on the sterile water tank can send an electric signal to the external control system when the water in the water tank is not full, and realize automatic water replenishment; The cross-section is the same as the cross-sectional shape and size of the upper and lower casings, and can completely conform to the inner cavity wall of the upper casing and the inner cavity wall of the lower casing. This structure is more reasonable and scientific, and can make the effective volume utilization rate of the container. Maximum and long service life of the flexible diaphragm, there is a thin plate between the flexible diaphragm on the sterile water tank and the contact type electric switch, which can improve the sensitivity of the contact type electric switch.

2) The water purifying device application system provided by the invention adopts a sterile water tank instead of the pressure tank, and selects a pressure limiting valve, a boosting pump, a conveying pump and the like in the system, which is required by the present invention compared with the prior art. With fewer components and equipment, lower cost, more scientific and more practical, it can store clean water in a sterile water tank without secondary pollution.

3) The present invention is provided between the water outlet of the reverse osmosis or sodium membrane module and the user end, and the activated carbon water filter can remove the odor in the water. Wenshan taste.

4) The pressure limiting valve provided on the system pipeline of the invention can also protect the safety of the system, and the system works under low water pressure, and the pressure limiting valve also solves the problem of wastewater back pressure.

5) The invention is provided with a user sanitary water end and a water container on the water inlet pipe of the system, wherein the water container is filled with a primary filter material, and the primary filtration before water purification is realized, and the filtered water can be used as a general It can also be used as a pretreatment of the water purification system, and it can also reduce the rate of change of the concentration of the wastewater flowing into the pipeline; so that the user can consume the wastewater through the user's sanitary water terminal during this period, and also for the subsequent drinking water. Filtering provides better conditions. In the present invention, since the waste water directly discharged from the original is reused in the water treatment system, the concentrated water can be recycled, so that the wastewater ratio can be greatly improved, and the scaling problem of the reverse osmosis filtration membrane can be solved. The entire system of the present invention has no wastewater discharge. The wastewater problem of the household reverse osmosis system has been completely solved, the user cost is reduced, and water resources are saved. Social benefits and resource benefits are enormous.

[Description of the Drawings]

Figure 1 is a cross-sectional view of a sterile water tank of the present invention;

2 is an application diagram of a water purifying device with a sterile water tank according to the present invention; Figure 3 is a first embodiment of the water purifying device application system of the present invention;

Figure 4 is a second embodiment of the water purifying device application system of the present invention;

Figure 5 is a third embodiment of the water purifying device application system of the present invention;

Figure 6 is a fourth embodiment of the water purifying device application system of the present invention;

Figure 7 is a fifth embodiment of the water purifying device application system of the present invention.

【detailed description】

The present invention provides a water purification device with a sterile water tank. Figure 2 shows an application diagram of a water purification unit with a sterile water tank. As shown in FIG. 2, the structure of the present invention comprises a water filter 9 for purifying water and a water tank for purifying the water, wherein the water filter 9 is equipped with a reverse osmosis or sodium membrane module; The water is not contaminated twice, and in order to overcome the many defects caused by the existing pressure tank, the water tank adopts a sterile water tank 11 which can prevent secondary pollution. In order to protect the sterile water tank 11, a pressure limiting valve 12 may be disposed between the sterile water tank 11 and the reverse osmosis (R0) or sodium filter assembly, and the pressure limiting value of the pressure limiting valve 12 is smaller than that of the sterile water tank 11 The pressure value avoids the impact of excessive water pressure on the sterile water tank 11.

The specific structure of the sterile water tank is as shown in FIG. 1 , and includes a container including an upper casing 1 and a lower casing 2 , and a flexible diaphragm 3 between the upper casing 1 and the lower casing 2 . The upper casing 1, the lower casing 2, and the flexible diaphragm 3 are integrally pressed by the bolts 5, and the container is partitioned into two upper and lower cavities by the flexible diaphragm 3, wherein the upper casing 1 is provided with a vent hole 7 therein. Passing through the atmosphere, the water tank can always be in a normal pressure state, avoiding high pressure due to its sealing; the lower casing 2 and the flexible diaphragm 3 form a closed water container, in the lower casing 2 At the bottom, there is a nozzle 4 for allowing water to enter and exit. The purified water filtered by the water filter 9 can enter from the nozzle 4 and be filled into the inner cavity of the lower casing 2 to serve as a water container for the user to use.

As a preferred embodiment, on the above base, the sterile water tank 11 is designed such that the upper casing 1, the lower casing 2 and the flexible diaphragm 3 have the same cross-sectional shape and size, and the membrane wall of the flexible membrane 3 can be combined with The casing 1 and the lower casing 2 are completely fitted, so that the flexible diaphragm 3 can be filled with water to completely conform to the inside of the upper casing 1 when the container has water, so that each space of the aseptic water tank can be utilized. The effective volume of the upper casing 1 can be utilized to the utmost extent, and the overall size of the water tank can be reduced.

When the water enters and exits the sterile water tank through the nozzle 4, the flexible diaphragm 3 will rise and fall with the rise or fall of the liquid surface, and the flexible diaphragm 3 is most vulnerable to such frequent fluctuations, so its service life determines the sterile water tank. The service life. The cross-sectional shape and size of the upper casing 1, the lower casing 2 and the flexible diaphragm 3 are designed to be identical, and the rise and fall of the level of the sterile water tank is completed under normal pressure due to the presence of the vent hole 7. Therefore, the flexible diaphragm 3 rises and falls with the water, but has no wrinkles and is not affected by the force. Therefore, the life of the flexible diaphragm 3 is greatly prolonged, thereby prolonging the service life of the sterile water tank. However, in actual engineering production, the cross-sectional dimensions and heights of the upper casing 1, the lower casing 2, and the flexible diaphragm 3 are allowed to be slightly different in consideration of the wall thickness of the flexible diaphragm and other factors.

On the upper casing 1 of the sterile water tank 11, a contact type electric switch 6 is further provided, which is electrically connected with the water pump in the water supply system, and can send a signal to the external water supply system to control the water supply of the sterile water tank 11, the touch The connected electric switch 6 realizes automatic water supply of the water purifying device.

Wherein, the aseptic water tank of the present invention is provided with a micro switch or a reed switch on the top of the upper casing 1 , and a connection between the flexible diaphragm 3 and the contact type electric switch 6 is also added. The sheet 10 above the touch-type electric switch 6, the sheet 10 can be directly in contact with the flexible diaphragm 3, and the sensitivity of the touch-type electric switch 6 can be improved. The height of the inner cavity of the upper casing 1 should be slightly smaller than or equal to the height of the flexible diaphragm 3, so that the water can be filled up and then the flexible diaphragm 3 can be lifted to the maximum height to be in contact with the sheet 10 to be issued to the contact type electric switch 6. signal.

When using, the air in the sterile water tank 11 is first drained, and the sterile water tank 11 is sterilized, then the water pump on the water source is started, the sterile water tank 11 is filled with water, and the water is filtered and purified by the water filter 9 to be drinking. After the standard of water enters the sterile water tank 11, after the water enters the sterile water tank 11, the flexible diaphragm 3 floats under the buoyancy of water. When the water completely fills the water tank, the flexible diaphragm 3 touches the contact type electric switch 6, and the contact The electric switch 6 issues a control command to the water supply system, and the water supply system stops the water supply. If the end user 8 uses water, the water level of the sterile water tank 11 drops. At this time, the flexible diaphragm 3 is simultaneously lowered, and the contact of the contact type electric switch 6 is released, and the contact type electric switch 6 sends a water supply signal to the water supply system. The water source is supplied to the sterile water tank 11. When the water used by the user of the sterile water tank 11 is replenished, the flexible diaphragm 3 pushes up the contact type electric switch 6, and the contact type electric switch 6 sends a stop water supply signal to the water supply system. The work is completed.

The present invention provides its application examples in a water treatment system in accordance with the above-described water purifying apparatus, and the features of the respective embodiments are described below.

Embodiment 1:

As shown in FIG. 3, the embodiment includes a reverse osmosis or sodium membrane module and a sterile water tank, and the aseptic water tank is provided with a contact type electric switch, and the reverse osmosis or sodium membrane module can purify the water. The water filter of the water filter is connected to the water inlet of the sterile water tank, and the water outlet of the sterile water tank is connected to the user end, and the user opens the sanitary faucet. Clean, pure water is available. In this embodiment, an activated carbon water filter is further disposed on the water outlet passage of the sterile water tank to the user end to further remove odor in the water and adjust the mouthfeel of the water. A water pretreatment assembly is disposed on the water inlet passage of the reverse osmosis or sodium membrane module, and the water pretreatment assembly inlet is connected to the municipal water network. Because the reverse osmosis membrane is delicate, it is very sensitive to oxidants such as hypochlorite, chlorine and bacteria in water, and is easily damaged by oxidants in water. In order to prolong its service life, water quality can be pretreated first to remove mechanical impurities and adsorption in water. Bacteria in water and hypochlorite, chlorine, etc. The water pretreatment component can be pp cotton + activated carbon, or ultrafiltration membrane + activated carbon, or kdf filter + ultrafiltration membrane. If anti-oxidation reverse osmosis or sodium membrane is used, it can be pretreated without activated carbon. water. The water pretreatment component outlet is connected to the reverse osmosis or sodium membrane module via a water inlet solenoid valve and a booster pump. Since the water pressure of the municipal water network is sometimes not very stable, when the water pressure is low, the water may not pass through the reverse osmosis or sodium membrane module. Therefore, it is necessary to set a booster pump before the reverse osmosis or sodium membrane module. The contact type electric switch above the bacteria tank controls the opening and closing of the booster pump. In order to prevent the booster pump from working in the absence of water, a low-pressure switch is also provided in front of the booster pump. The low-pressure switch stops the booster pump when the line water pressure is low. In order to prevent the water from flowing away from the waste water pipeline when the booster pump is not working, a water inlet solenoid valve is arranged on the water path before the booster pump, and a choke valve can also be arranged at the water outlet end of the booster pump.

As shown in Fig. 3, since the reverse osmosis or sodium membrane module can only allow a part of pure water to pass through, and the surface is blocked by the dirt after a period of use, it needs to be cleaned frequently. Therefore, the embodiment is described above. The reverse osmosis or sodium filtration membrane outlet is connected to a waste water outlet passage, and the generated wastewater can be discharged from the side wall along the waste water pipeline. The channel is equipped with a 2-in-1 waste water valve, which can be composed of a combination of a wastewater proportionalizer and a flushing valve. The wastewater proportionaler is used to adjust the ratio between the wastewater and the purified water. The flushing valve is used to flush the reverse osmosis or sodium membrane module. Of course, a multi-function valve with dual functions of the wastewater proportionaler and the flushing valve can be used to prevent reverse osmosis or The sodium membrane module is clogged and extends its life. Embodiment 2:

As shown in FIG. 4, the embodiment is basically the same as the system of the first embodiment. The difference is that the pipeline is connected to the pipeline of the sterile water tank and the activated carbon water filter, and the pump, the pressure switch and the single pump are also provided. To the valve, the pump inlet is connected to the sterile tank outlet. This is because the sterile water tank is a normal pressure device, which can only deliver water to the faucet when it is above the user's water outlet; when it is located below the user's water outlet, the water cannot be directly discharged, so in this installation situation A water pump must be installed in the pipeline. When the user chooses the water When using a common faucet, it is also necessary to set a pressure switch on the water path between the water pump and the faucet. The pressure value of the pressure switch should be less than the output pressure value of the water pump. When the water head is open, the water pressure drops, and the pressure switch starts. Water pump; When the water head is closed, the water pressure rises and the pressure switch closes the water pump. In order to allow the pressure switch to work smoothly, a check valve is also provided on the water tank of the sterile water tank and the user end. The check valve can also be designed on the water pump or on the pressure switch (inlet).

In this embodiment, the booster pump and the transfer pump can also be realized by a double-head pump. Embodiment 3:

As shown in FIG. 5, this embodiment is basically the same as the system of the second embodiment, except that the present embodiment is provided with a pressure limiting valve between the reverse osmosis or sodium membrane module and the sterile water tank. The pressure limit value of the pressure valve is smaller than the pressure resistance value of the sterile water tank. This is because when the water inlet solenoid valve in the water supply system leaks or the contact electric switch of the control water pump fails, the water keeps entering the sterile water tank, and the flexible diaphragm in the sterile water tank is very thin when entering the sterile When the water pressure in the water tank is too high, it will have a large impact on the flexible diaphragm. In order to protect the sterile water tank and prolong the service life of the sterile water tank, the present embodiment is in a sterile water tank and reverse osmosis (or sodium filtration). Between the components, a limited pressure valve is also provided to limit the pressure of the water flowing into the sterile water tank and prevent the sterile water tank from rupturing.

The booster pump and the transfer pump of this embodiment can also be realized by a double-head pump. Embodiment 4:

As shown in FIG. 6, the embodiment is basically the same as the system of the third embodiment. The difference is that the user selects the electric switch type pure water faucet, which can directly control the opening and closing of the water pump, and thus leads to the sterile water tank. There is no need for check valve control or pressure switch on the outlet pipe of the user side. Embodiment 5:

As shown in FIG. 7, in this embodiment, a water container is disposed on a pipeline connecting the municipal water network and the water pretreatment component, and the water outlet is connected to the water pretreatment component and the other water outlet is connected. Sanitary faucet. The water container may be equipped with a primary filter material, such as ultrafiltration membrane, PP cotton, ceramic, kdf filter material, sand, activated carbon, medical stone, defluorinated filter material or any two or two of the above. More than one combination, as a primary water filter container. The water container has a function. First, the municipal ice source water can be initially filtered, as a general The use of sanitary water; second, pre-treatment of the water entering the water purification unit can provide better conditions for subsequent drinking water filtration; third, it can slow down the change of the concentration of the wastewater flowing into the pipeline (if the water container The volume of 20 liters, each time to create 4 liters of water, if no one uses the sanitary faucet during this period, the water shield in the system is concentrated from 24 liters to 20 liters, up 20%; if the volume of the water container is 4 liters, Every time you make 4 liters of water, if no sanitary faucet is used during this period, the impurities in the system will be concentrated from 8 liters to 4 liters, which will increase by 100%, so the larger the volume of the water container, the better.) Since the current municipal water quality is mostly in the form of secondary water supply, and because of the pipeline, the water quality of the final inflow user is correspondingly reduced. At the same time, since the wastewater is returned to the system, the concentration of the wastewater will continuously increase. Therefore, the water container is set up. The initial filtration can further improve the quality of the water entering the water purification device and prolong the service life of the subsequent water purification components.

As shown in FIG. 7, this embodiment is further connected between the outlet of the reverse osmosis or sodium membrane module and the water container, and has a waste water return line, and the line is equipped with a wastewater reuse valve, which is reverse osmosis or sodium. The wastewater discharged after filtration of the membrane module can be returned to the water container through the wastewater reuse valve. On the one hand, the wastewater can be returned to the water treatment system and re-filtered by the water treatment component, reverse osmosis or sodium membrane module to achieve the purpose of wastewater reuse; on the other hand, the wastewater can be discharged through the sanitary faucet and used as sanitary water. Wastewater finds use and saves energy. At the same time, it can also ensure that when the concentration of wastewater in the waterway system is getting higher and higher, the waste water is consumed by the sanitary faucet, which provides better conditions for subsequent drinking water filtration and avoids too much clogging of the pipeline.

In order to prevent the water pressure of the municipal water network from being too high, the water purification system is compressed. In this embodiment, a pressure limiting valve is further disposed on the water inlet pipe, and the pressure limiting valve is placed between the water pipe and the water container. On the road, the water entering the entire water purification system can be pressed within the set water pressure value to ensure the safety of the entire system. More importantly, setting the pressure limit value of the pressure limiting valve to be less than the water pressure of the booster pump ensures that the water pressure of the wastewater (equal to or slightly lower than the outlet pressure of the booster pump) is greater than that of the water container. Water pressure, which solves the pressure problem for the wastewater to flow back into the system.

If the wastewater is directly discharged, a fixed proportion of the wastewater proportionalizer may be used. However, if the wastewater is reused in the system, the system water pressure change (the system water pressure fluctuates between 0 and the pressure limiting value of the pressure limiting valve). For the impact of ordinary wastewater proportionalizers, the use of wastewater reuse valves can solve this problem.

The above description is only a preferred embodiment of the present invention, and the description thereof is more specific and detailed, and is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

Rights request

A water purifying device comprising a water filter capable of purifying water and a water tank connected to the water outlet of the water filter, wherein: the water tank is a sterile water tank, and the inside is provided with a flexible diaphragm The flexible diaphragm divides the container into upper and lower casings, wherein the upper casing is provided with an opening communicating with the atmosphere, and the lower casing is provided with a water inlet and a water outlet communicating with the waterway.

2. A water purifying apparatus according to claim 1, wherein: said flexible diaphragm is disposed in a middle portion of the sterile water tank, and the container is divided into an air chamber and a water chamber, and the flexible diaphragm has a cross section and an upper portion. The cross-sectional shape and size of the inner wall of the lower casing are the same, and the flexible diaphragm can completely conform to the inner cavity wall of the upper casing and the inner cavity wall of the lower casing.

3. The water purifying device according to claim 1, wherein: the upper casing is provided with a contact type electric switch that can be in contact with the flexible film, and the contact type electric switch is micro-motion. Switch or reed switch.

A water purification device according to claim 1 or 2 or 3, wherein: said water filter is a reverse osmosis water filter or a sodium water filter.

A water purification device according to claim 1 or 2 or 3, wherein: a pressure limiting valve is further disposed on the water passage between the water inlet of the sterile water tank and the water outlet of the water filter. The pressure resistance value of the sterile water tank is higher than the pressure limit value of the pressure limiting valve.

6. An application system for a water purification device, comprising: a water filter capable of purifying water and a water tank connected to the water outlet of the water filter, wherein: the water tank is a sterile water tank, and the water outlet is connected a water pretreatment component is disposed on the water inlet passage of the water filter, the water inlet of the water pretreatment component is connected with the municipal water network, and the water inlet electromagnetic valve is installed thereon, and the water outlet of the 7j pretreatment component is pressurized The pump is connected to the water filter; the sterile water tank is provided with a switch electrically connected to the booster pump, and a low-pressure switch is arranged on the pipeline connecting the water inlet solenoid valve and the booster pump; the water filter outlet is further connected There is a waste water outlet passage, which is provided with a flushing valve, a wastewater proportionaling device or a multifunctional waste water valve.

7. The application system of a water purifying device according to claim 6, wherein: a pressure limiting valve is further disposed on the water passage between the water inlet of the sterile water tank and the water outlet of the water filter, The pressure resistance value of the sterile water tank is higher than the pressure limit value of the pressure limiting valve.

8. The application system of a water purifying device according to claim 6, wherein: the sterile water An activated carbon water filter is also arranged between the box and the user end.

The application system of a water purifying device according to claim 6, wherein: the pipeline connecting the sterile water tank and the user end is provided with a transfer pump, or a transfer pump and a check valve. The combination is, or a combination of a transfer pump, a check valve and a pressure switch, the pressure switch is located on the outlet pipe of the water pump, and the pressure sensitive value is smaller than the water delivery pressure of the transfer pump.

The application system of a water purifying device according to any one of claims 5-9, wherein: the pressure limiting value of the pressure valve is smaller than the water outlet pressure of the boosting pump; and the water outlet of the water container is The water pretreatment component is connected; the waste water outlet channel connected to the water filter is connected to the water container, and one or one water channel is connected between the waste water channel, the water container, or the water container and the water pretreatment component. Above the sanitary faucet, a wastewater reuse valve is arranged on the waste water outlet passage.