A backwashing self-cleaning direct drinking water system

Abstract

The present invention provides a backwash self-cleaning direct drinking water system, which relates to the technical field of direct drinking water systems. The backwash self-cleaning direct drinking water system provided by the present invention comprises a first disinfector, a self-cleaning filter, a coarse and fine filter buffer assembly and a water storage tank which are sequentially arranged along the flow direction of the water body; the first disinfector is used to kill bacteria and microorganisms in the raw water; the self-cleaning filter has a backwash water inlet, a backwash water outlet, a water inlet for receiving the water flow after disinfection by the first disinfector, and a water outlet connected to the coarse and fine filter buffer assembly; the coarse and fine filter buffer assembly is used to perform coarse and fine filtration on the water body discharged from the water outlet and discharge it to the water storage tank. The backwash self-cleaning direct drinking water system provided by the present invention can increase the working cycle and service life of the self-cleaning filter, and reduce the cleaning difficulty and maintenance cost.

Description

Technical Field

[0001] The invention relates to the technical field of direct drinking water systems, and in particular to a backwashing self-cleaning direct drinking water system. Background Art

[0002] With the development of society and the advancement of science and technology, people have higher and higher requirements for the quality of life, among which the quality of drinking water is an important aspect. Therefore, various direct drinking water systems have emerged, which can provide people with safe and healthy drinking water. In these direct drinking water systems, the filter element is a key part, which is responsible for filtering out impurities and harmful substances in the water. However, during the use of the filter element, due to its microporous structure, it is easy to be blocked by impurities, and it needs to be cleaned regularly to ensure its filtering effect.

[0003] Existing direct drinking water systems usually use a pre-filter device to perform preliminary filtration on the water source, and then perform fine filtration through a filter element. In order to keep the filter element clean, there are already some solutions in the prior art, such as regularly replacing the filter element, or removing impurities on the filter element by manual cleaning.

[0004] Although the prior art has provided some solutions, there are still some problems and shortcomings. First, the existing disinfection and sterilization device is usually set at the rear end of the filter element, that is, after the fine filtration. Although this can ensure the safety of water quality, it cannot effectively prevent bacteria and microorganisms from adhering and multiplying on the surface of the filter element, thereby forming a biofilm and reducing the filtering effect and service life of the filter element. Secondly, the method of regularly replacing the filter element or manually cleaning the filter element not only increases the maintenance cost, but also brings inconvenience to users. Summary of the invention

[0005] The object of the present invention is to provide a backwash self-cleaning direct drinking water system, which can increase the working cycle and service life of the self-cleaning filter and reduce the cleaning difficulty and maintenance cost.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a backwashing self-cleaning direct drinking water system, comprising a first disinfector, a self-cleaning filter, a coarse and fine filtering buffer assembly and a water storage tank, which are sequentially arranged along the flow direction of the water body;

[0008] The first sterilizer is used to kill bacteria and microorganisms in the raw water;

[0009] The self-cleaning filter has a backwash water inlet, a backwash water outlet, a water inlet for receiving the water flow disinfected by the first disinfector, and a water outlet connected to the coarse and fine filter buffer assembly;

[0010] The coarse and fine filtering buffer component is used for coarse filtering and fine filtering of the water discharged from the water outlet and discharges it to the water storage tank.

[0011] Further, the self-cleaning filter comprises a housing, a filter body, a diaphragm and a stirring mechanism;

[0012] The filter body and the diaphragm are both located in the shell, the diaphragm divides the shell into a filter cavity located at the top and a water outlet cavity located at the bottom, and the filter body is located in the filter cavity;

[0013] The housing has the water inlet, the water outlet and the backwash water outlet, the water inlet and the backwash water outlet are both connected to the filter chamber, and the water outlet is connected to the water outlet chamber;

[0014] The stirring mechanism is installed on the shell and extends into the filter cavity. The stirring mechanism includes the backwash water inlet, water distribution holes for flushing the filter body, and blades for stirring the filter body from bottom to top.

[0015] Furthermore, a filter screen is provided at the outlet of the water distribution hole, and the filter screen is used to prevent the filter body from entering the water distribution hole.

[0016] Furthermore, the stirring mechanism also includes a driving assembly and a rotating shaft;

[0017] The rotating shaft extends into the housing and is rotatably connected to the housing, the blades are connected to the rotating shaft and a first backwash water inlet channel is formed between the rotating shaft, the top end of the rotating shaft has the backwash water inlet communicated with the first backwash water inlet channel, and the lower surface of the blades has a plurality of water distribution holes communicated with the first backwash water inlet channel;

[0018] The driving assembly is connected to the rotating shaft to drive the rotating shaft to rotate.

[0019] Furthermore, the farther away from the axis of the rotating shaft the blade is in the radial direction of the rotating shaft, the sparser the distribution of the water distribution holes becomes.

[0020] Further, the water distribution hole comprises a first water distribution hole arranged close to the rotating shaft, a second water distribution hole arranged away from the rotating shaft, and a third water distribution hole located between the first water distribution hole and the second water distribution hole;

[0021] The first water distribution hole is arranged toward the rotating shaft, the second water distribution hole is arranged toward the housing, and the third water distribution hole is arranged in a direction parallel to the axial direction of the rotating shaft.

[0022] Furthermore, the coarse and fine filtration cache assembly includes an activated carbon filter, a first disc membrane filter, an intermediate water tank and a reverse osmosis membrane filter arranged in sequence along the water flow direction, and the water outlet of the reverse osmosis membrane filter is connected to the first water inlet of the water storage tank.

[0023] Furthermore, it also includes a circulating water pipeline and a second disc membrane filter arranged on the circulating water pipeline, and the water outlet of the second disc membrane filter is connected to the second water inlet of the water storage tank.

[0024] Furthermore, it also includes a second disinfector, a nutrient mineralization filter element and an activated carbon filter which are arranged in sequence along the flow direction of the water body, and the second disinfector is used to kill bacteria and microorganisms in the water body discharged from the water storage tank.

[0025] Furthermore, at least one of the activated carbon filter, the disc membrane filter, the reverse osmosis membrane filter, the nutrient mineralization filter element and the activated carbon filter is provided with a water flow sensor at its water outlet, and at least one of the water outlet is provided with a pressure sensor, and the water flow sensor and the pressure sensor are used to be connected to a central processing unit.

[0026] The backwashing self-cleaning direct drinking water system provided by the present invention can produce the following beneficial effects:

[0027] In the backwashing self-cleaning direct drinking water system provided by the present invention, raw water can enter the first disinfector first, which can kill bacteria and microorganisms in the raw water. The sterilized water enters the self-cleaning filter, is filtered by the self-cleaning filter, and then enters the coarse and fine filtration buffer component for coarse filtration and fine filtration to fully remove harmful substances in the water. The filtered water enters the water storage tank for storage. In addition, since the self-cleaning filter has a backwashing water inlet and a backwashing water outlet, the self-cleaning filter can be cleaned regularly with backwashing water to ensure the filtering effect of the self-cleaning filter.

[0028] Compared with the prior art, the backwash self-cleaning direct drinking water system provided by the present invention is provided with a first disinfector upstream of the self-cleaning filter. The first disinfector can kill bacteria, algae and microorganisms in the raw water in advance to avoid the formation of biofilm in the self-cleaning filter, thereby improving the working cycle and service life of the self-cleaning filter and reducing the cleaning difficulty and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a backwashing self-cleaning direct drinking water system provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of a self-cleaning filter provided by an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of a blade provided by an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of a reverse osmosis component provided by an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the three-dimensional structure of a reverse osmosis membrane provided in an embodiment of the present invention.

[0035] Icons: 1-first disinfector; 2-self-cleaning filter; 21-housing; 211-water inlet; 212-water outlet; 213-backwash water outlet; 22-filter body; 23-diaphragm; 24-blade; 241-water distribution hole; 2411-first water distribution hole; 2412-second water distribution hole; 2413-third water distribution hole; 25-rotating shaft; 251-backwash water inlet; 26-first backwash water inlet channel; 3-coarse and fine filter cache assembly; 31-first activated carbon filter ; 32-first disc membrane filter; 321-gasket; 3211-protrusion; 322-reverse osmosis membrane; 3221-first through hole; 3222-second through hole; 323-clean water discharge channel; 324-second backwash water inlet channel; 325-backwash water outlet channel; 33-intermediate water tank; 34-reverse osmosis membrane filter; 4-water storage tank; 5-circulating water pipeline; 6-second disc membrane filter; 7-second disinfector; 8-nutrient mineralization filter element; 9-second activated carbon filter. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0040] This embodiment provides a backwash self-cleaning drinking water system. Figure 1 As shown, it includes a first disinfector 1, a self-cleaning filter 2, a coarse and fine filter buffer component 3 and a water storage tank 4 which are arranged in sequence along the flow direction of the water body;

[0041] The first sterilizer 1 is used to kill bacteria and microorganisms in the raw water;

[0042] The self-cleaning filter 2 has a backwash water inlet 251, a backwash water outlet 213, a water inlet 211 for receiving the water flow disinfected by the first disinfector 1, and a water outlet 212 connected to the coarse and fine filter buffer assembly 3;

[0043] The coarse and fine filtering buffer component 3 is used to perform coarse filtering and fine filtering on the water discharged from the water outlet 212 and discharge the water to the water storage tank 4 .

[0044] In the above-mentioned backwash self-cleaning direct drinking water system, Figure 1As shown, the raw water can enter the first sterilizer 1 first, and the first sterilizer 1 can kill bacteria and microorganisms in the raw water. The sterilized water enters the self-cleaning filter 2, is filtered by the self-cleaning filter 2, and then enters the coarse and fine filtration buffer component 3 for coarse filtration and fine filtration to fully remove harmful substances in the water. The filtered water enters the water storage tank 4 for storage. In addition, since the self-cleaning filter 2 has a backwash water inlet 251 and a backwash water outlet 213, the self-cleaning filter 2 can be cleaned regularly by backwashing water to ensure the filtering effect of the self-cleaning filter 2.

[0045] Compared with the prior art, the backwash self-cleaning direct drinking water system provided in this embodiment can not only remove suspended matter, colloids, organic matter and tiny impurities in the raw water to ensure the purity of the water quality, but also has a first disinfector 1 arranged upstream of the self-cleaning filter. The first disinfector 1 can kill bacteria, algae and microorganisms in the raw water in advance to prevent them from attaching and multiplying on the filter body 22 in the self-cleaning filter 2, thereby improving the working cycle and service life of the self-cleaning filter and reducing the cleaning difficulty and maintenance cost.

[0046] The self-cleaning filter 2 is specifically described below:

[0047] In an optional embodiment, if Figure 2 As shown, the self-cleaning filter 2 comprises a housing 21, a filter body 22, a diaphragm 23 and a stirring mechanism, wherein:

[0048] The diaphragm 23 is located in the housing 21, and the diaphragm 23 divides the housing 21 into a filter chamber located at the top and a water outlet chamber located at the bottom. The filter body 22 is located in the filter chamber and can filter the water entering the housing 21;

[0049] The housing 21 has a water inlet 211, a water outlet 212 and a backwash water outlet 213. The water inlet 211 and the backwash water outlet 213 are both connected to the filter chamber, and the water outlet 212 is connected to the water outlet chamber. The diaphragm 23 can separate the filter body 22 from the water outlet 212 to prevent the filter body 22 from entering the water outlet 212.

[0050] The stirring mechanism is installed on the housing 21 and extends into the filter chamber. The stirring mechanism includes a backwash water inlet 251, a water distribution hole 241 for flushing the filter body 22, and a blade 24 for stirring the filter body 22 from bottom to top.

[0051] During use, water enters the filter chamber through the water inlet 211 and is filtered through the filter body 22 in the filter chamber, then enters the water outlet chamber through the diaphragm 23, and is finally discharged from the water outlet 212; after long-term use, the water inlet 211 and the water outlet 212 can be closed, and then backwash water is passed into the backwash water inlet 251, and the backwash water is discharged through the water distribution holes 241 on the stirring mechanism to flush the filter body 22. At the same time, the blades 24 in the stirring mechanism stir the filter body 22 from bottom to top, thereby improving the flushing effect of the filter body 22.

[0052] The self-cleaning filter 2 stirs and flushes the filter body 22 through the stirring mechanism, so that physical friction is generated between the filter bodies 22, so as to achieve deep cleaning and regeneration of the filter body 22, ensure the cleanliness of the filter element, and improve the cleaning cleanliness. Therefore, the above method can not only effectively prevent bacteria and microorganisms from adhering and multiplying on the surface of the filter body 22, thereby forming a biofilm and reducing the filtering effect and service life of the self-cleaning filter 2, but also can clean the impurities accumulated on the outside of the filter body 22 through automatic flushing and self-cleaning without using chemical cleaning agents, thereby improving the working cycle and service life of the filter material.

[0053] In an optional embodiment, a filter screen is provided at the outlet of the water distribution hole 241 , and the filter screen is used to prevent the filter body 22 from entering the water distribution hole 241 .

[0054] Of course, when the diameter of the water distribution hole 241 is small enough, the filter screen may not be provided at the outlet of the water distribution hole 241 .

[0055] In an optional embodiment, the stirring mechanism further comprises a driving assembly and a rotating shaft 25, wherein:

[0056] like Figure 2 As shown, the rotating shaft 25 extends into the outer shell 21 and is rotatably connected to the outer shell 21, the blades 24 are connected to the rotating shaft 25 and a first backwash water inlet channel 26 is formed between the rotating shaft 25, the top of the rotating shaft 25 has a backwash water inlet 251 connected to the first backwash water inlet channel 26, and the backwash water can enter the backwash water inlet 251 after being pressurized. The lower surface of the blade 24 has a plurality of water distribution holes 241 connected to the first backwash water inlet channel 26; the driving component is connected to the rotating shaft 25 to drive the rotating shaft 25 to rotate.

[0057] When in use, the driving assembly drives the rotating shaft 25 to rotate, and the rotating shaft 25 drives the blades 24 to rotate. The blades 24 stir the filter body 22 from bottom to top. The surface that lifts and stirs the filter body 22 is the upper surface of the blades 24. Since the water distribution holes 241 are arranged on the lower surface of the blades 24, during the stirring process, the filter body 22 is not easy to cause impact to the water distribution holes 241, and it is not easy to enter the water distribution holes 241. The water outlet resistance of the water distribution holes 241 is smaller, which can effectively produce a flushing effect on the filter body. Under the flushing of backwash water and the mutual friction between the filter bodies 22, the substances attached to the surface of the filter body 22 can be effectively removed, and finally the backwash water is discharged from the backwash water outlet 213.

[0058] In an optional embodiment, the first backwash water inlet channel 26 includes a main channel and multiple first branch channels, the top of the main channel is a backwash water inlet 251, and the multiple first branch channels are all connected to the main channel for discharging the backwash water in the main channel to each blade 24 one by one. Each branch channel can be connected to multiple second branch channels, and the end of the second branch channel away from the first branch channel is a water distribution hole 241 to achieve the spraying of the backwash water in the first branch channel.

[0059] In an optional embodiment, multiple layers of blades 24 may be provided in the filter chamber. Depending on the height of the housing 21, a layer of blades 24 may be provided every 20-30 cm. Figure 3 As shown, each layer of blades 24 includes 3-5 blades 24, and each blade 24 is evenly spaced around the rotating shaft 25. The blades 24 are bent to form a smooth and continuous curved surface, and one end is welded to the rotating shaft 25 vertically installed in the center of the filter chamber. The height of the bent blades 24 is 5-8 cm.

[0060] Specifically, two adjacent layers of blades 24 may be staggered along the axial direction of the rotating shaft 25 .

[0061] Of course, if Figure 2 As shown, a blade 24 may also be provided in the filter cavity. The blade 24 extends spirally around the axis of the rotating shaft 25 . The above blade may also be provided in plurality. The plurality of blades 24 are distributed at intervals along the circumference of the rotating shaft 25 .

[0062] The rotating shaft 25 and the blades 24 can both be made of food-grade stainless steel, and the thickness of the blades 24 is 5-8 mm.

[0063] In an optional embodiment, the water distribution holes 241 on the blade 24 are distributed more sparsely as they are farther away from the axis of the rotating shaft 25 in the radial direction of the rotating shaft 25 .

[0064] The closer the filter body is to the rotating shaft 25 in the filter chamber, the weaker the stirring effect of the blades 24 is, which can easily cause this part of the filter body 22 to produce greater resistance to the backwash water due to insufficient stirring, and thus cause this part of the filter body 22 to be unable to effectively remove the surface attachments. In the above arrangement, the water distribution holes close to the rotating shaft 25 are distributed more densely, so that the water distribution holes 241 can have a better flushing effect on the filter body 22 close to the rotating shaft 25, and avoid incomplete flushing of the filter body 22 at the center as much as possible, thereby affecting the filtering effect of the self-cleaning filter 2.

[0065] In an optional embodiment, if Figure 2 As shown, the water distribution hole 241 includes a first water distribution hole 2411 arranged close to the rotating shaft 25, a second water distribution hole 2412 arranged away from the rotating shaft 25, and a third water distribution hole 2413 located between the first water distribution hole 2411 and the second water distribution hole 2412; the first water distribution hole 2411 is arranged toward the rotating shaft 25, the second water distribution hole 2412 is arranged toward the outer shell 21, and the third water distribution hole 2413 is arranged in a direction parallel to the axial direction of the rotating shaft 25.

[0066] In the above embodiment, since the first water distribution hole 2411 is arranged toward the rotating shaft 25, the filter body 22 around the rotating shaft 25 can be flushed more specifically, effectively avoiding the formation of a dead zone near the rotating shaft 25 that cannot be flushed. In addition, the second water distribution hole 2412 can flush the filter body 22 close to the housing 21, and the third water distribution hole 2413 can flush the filter body 22 below. The three water distribution holes cooperate with each other to effectively ensure the flushing effect of the water distribution hole 241, thereby extending the service life of the self-cleaning filter 2.

[0067] Specifically, the injection time of the backwash water may be 5-15 minutes.

[0068] In an optional embodiment, the filter body may include activated carbon, and of course may also include other particulate matter with filtering effect.

[0069] In an optional embodiment, the driving assembly may include a motor and a transmission structure, and the transmission structure may transmit the power of the motor to the rotating shaft 25 to realize the rotation of the rotating shaft 25.

[0070] The transmission structure may include a gear transmission structure, a chain transmission structure or a belt transmission structure.

[0071] In a preferred embodiment, the transmission structure includes a gear transmission structure, a driven gear is fixedly connected to the rotating shaft 25, and a driving gear meshing with the driven gear is fixedly connected to the power output end of the motor. The motor drives the rotating shaft 25 to rotate through the transmission of the driving gear and the driven gear.

[0072] Under the control of the control system, the motor can rotate slowly with the injection of backwash water, with a speed of 2-10 revolutions per second.

[0073] In an optional embodiment, the coarse and fine filtration cache assembly 3 includes a first activated carbon filter 31, a first disc membrane filter 32, an intermediate water tank 33 and a reverse osmosis membrane filter 34 arranged in sequence along the flow direction of the water body, and the water outlet of the reverse osmosis membrane filter 34 is connected to the first water inlet of the water storage tank 4.

[0074] In the above embodiment, the first activated carbon filter 31 is a coarse filter, which is used to preliminarily remove suspended matter, colloids and organic matter in the water to protect the subsequent fine filtration device; the first disc membrane filter 32 and the reverse osmosis membrane filter 34 are fine filtration, which are used to further remove tiny impurities and soluble organic matter in the water to ensure the high quality of the output water.

[0075] Among them, the first disc membrane filter 32 has the advantages of high efficiency, precision, and corrosion resistance. It can effectively remove impurities such as suspended matter, colloids, and microorganisms in the water, ensure the safety and reliability of water quality, and can also effectively improve the filtration efficiency and increase the water purification rate.

[0076] In an optional embodiment, the first disc membrane filter 32 includes a housing and a reverse osmosis component disposed in the housing. Figure 4 As shown, the reverse osmosis component includes a gasket 321 and a reverse osmosis membrane 322, and the gasket 321 and the reverse osmosis membrane 322 are configured as multiple pieces, and the multiple gaskets 321 and the multiple reverse osmosis membranes 322 are alternately stacked; the reverse osmosis membrane 322 protrudes from the edge of the gasket 321 along its own radial direction, so that a gap is formed between the lower surface of the upper reverse osmosis membrane 322 and the upper surface of the lower reverse osmosis membrane 322; a clean water discharge channel 323 is formed between the middle parts of the multiple gaskets 321 and the middle parts of the multiple reverse osmosis membranes 322.

[0077] When in use, water discharged from the first activated carbon filter 31 enters the housing, is filtered through the upper and lower surfaces of each reverse osmosis membrane 322, and finally enters the clean water discharge channel 323 from the first through hole 3221 in the middle of the reverse osmosis membrane 322 and is discharged from the housing, thereby filtering the water body.

[0078] In the above embodiment, the purified water discharge channel 323 is directly formed between the middle of the plurality of gaskets 321 and the middle of the plurality of reverse osmosis membranes 322, and no additional discharge pipe body is required, so the structure is simpler and cost is saved.

[0079] After a long period of filtration, tiny impurities and soluble organic matter will adhere to the upper and lower surfaces of the reverse osmosis membrane 322, and the reverse osmosis membrane 322 needs to be backwashed regularly. Figure 4As shown, the upper surface of the gasket 321 is provided with a protrusion 3211, and the lower surface is provided with a groove. In the two adjacent gaskets 321, the protrusion 3211 in the lower gasket 321 extends into the groove in the upper gasket 321, so that the relative position of the two is limited, and a second backwash water inlet channel 324 is directly formed between the two, and there is no need to set up an additional backwash water inlet pipe. Each gasket 321 has a backwash water outlet channel 325 connected to the second backwash water inlet channel 324. The outlet of the backwash water outlet channel 325 is located on the outer peripheral surface of the gasket 321. The reverse osmosis membrane 322 in the two adjacent gaskets 321 is sleeved on the outside of the protrusion 3211 of the lower gasket 321, as shown in FIG. Figure 5 As shown, the reverse osmosis membrane 322 is provided with a second through hole 3222 for the protrusion 3211 to pass through.

[0080] During backwashing, backwash water can enter each gasket 321 from the second backwash water inlet channel 324 and be discharged from the outer peripheral surface of the gasket 321 through the backwash water outlet channel 325. The discharged flushing water can flush the surface of the reverse osmosis membrane 322 on the upper and lower sides of the gasket 321, so that the upper and lower surfaces of each reverse osmosis membrane 322 can be directly flushed by the backwash water, and the backwashing effect is better, which can effectively remove tiny impurities and soluble organic matter on the surface of the reverse osmosis membrane 322 in a short time.

[0081] Due to the different filtering efficiencies of the first disc membrane filter 32 and the reverse osmosis membrane filter 34 and the need for regular backwashing of the upstream self-cleaning filter 2, an intermediate water tank 33 is provided between the first disc membrane filter 32 and the reverse osmosis membrane filter 34 in the above embodiment. The intermediate water tank 33 can buffer part of the water to ensure that the downstream reverse osmosis membrane filter 34 can operate smoothly and continuously.

[0082] Specifically, a water pump is provided between the intermediate water tank 33 and the reverse osmosis membrane filter 34 , and the water pump pressurizes the water and pumps the water into the reverse osmosis membrane filter 34 .

[0083] Since the permeation efficiency of the reverse osmosis membrane filter 34 is relatively low, the reverse osmosis membrane filter 34 may be configured in multiple numbers, and the multiple reverse osmosis membrane filters 34 are arranged in parallel to jointly process the water body.

[0084] In an optional embodiment, the backwash self-cleaning direct drinking water system also includes a circulating water pipeline 5 and a second disc membrane filter 6 arranged on the circulating water pipeline 5, and the water outlet of the second disc membrane filter 6 is connected to the second water inlet of the water storage tank 4. The second disc membrane filter 6 can filter the unused circulating water to remove tiny impurities and soluble organic matter in the water.

[0085] In an optional embodiment, the backwash self-cleaning direct drinking water system also includes a second disinfector 7, a nutrient mineralization filter element 8 and a second activated carbon filter 9 arranged in sequence along the water flow direction, and the second disinfector 7 is used to kill bacteria and microorganisms in the water discharged from the water tank 4.

[0086] In the above embodiment, the second sterilizer 7 can further sterilize the water discharged from the water storage tank 4 to ensure the absolute safety of the water quality and avoid health problems caused by water quality problems.

[0087] When in use, the water discharged from the water tank 4 is disinfected and sterilized by the second disinfector 7 and then enters the nutrient mineralization filter element 8 and the second activated carbon filter 9 in sequence, and finally can enter the user's pipe network.

[0088] In an optional implementation, a sterilizer may also be provided on the circulating water pipeline 5 , and the sterilizer sterilizes the return water in the circulating water pipeline 5 .

[0089] In an optional embodiment, at least one of the first activated carbon filter 31, the first disc membrane filter 32, the reverse osmosis membrane filter 34, the second disc membrane filter 6, the nutrient mineralization filter element 8 and the second activated carbon filter 9 is provided with a water flow sensor at its water outlet, and at least one of the above sensors is provided with a pressure sensor at its water outlet to detect whether the water output of each filter is within the range of normal use, thereby facilitating monitoring of the use status of the filter.

[0090] The water flow sensor and the pressure sensor are used to connect with the central processing unit, and the central processing unit controls the corresponding solenoid valve, pump, and stirring mechanism to operate according to the received information.

[0091] In an optional embodiment, the above-mentioned backwash self-cleaning direct drinking water system may also include a human-machine interface, which is used for system parameter settings, status display, alarm prompts, etc.

[0092] In a preferred embodiment, the water outlet of the self-cleaning filter 2 is provided with a water flow sensor and a pressure sensor, and the automatic flushing control receives the signals of the water flow sensor and the pressure sensor through the central controller to judge the blockage of the filter element. When the blockage of the self-cleaning filter 2 reaches the set value, the central controller starts the stirring mechanism to clean the filter body 22 through high-pressure water flow and physical stirring. After the cleaning is completed, the system automatically returns to the normal filtering state.

[0093] In an optional embodiment, a water quality sensor is provided downstream of the first sterilizer 1 and the second sterilizer 7, and the water quality sensor can detect the quality of the water after disinfection and sterilization at any time.

[0094] The first disinfector 1 and the second disinfector 7 can be controlled by the central controller according to the signal of the water quality sensor. The central controller can control the working time and intensity of the disinfection device according to the set disinfection program to ensure that the bacteria and microorganisms in the water are effectively killed.

[0095] In the above implementation, the automatic control system can realize automatic control of the entire direct drinking water system, including functions such as filter cleaning, disinfection and sterilization, and water quality monitoring, reduce manual intervention, and improve the operating efficiency and stability of the system. The automatic control system realizes real-time monitoring and automatic adjustment of the entire water treatment process, improves the intelligence level of the system, and reduces the complexity and errors of manual operation.

[0096] The above system is suitable for direct drinking water needs of different scales and scenarios such as households, office buildings, industrial parks, etc., and has broad application prospects and significant market value.

[0097] In summary, the backwashing self-cleaning direct drinking water system provided in the above embodiment has the following advantages:

[0098] 1. Pre-disinfection and sterilization: Adding a first disinfector 1 before the self-cleaning filter 2 can kill various bacteria, algae and microorganisms in the water, prevent them from adhering to and multiplying on the surface of the filter body 22, and ensure the safety of water quality.

[0099] 2. Prolong the service life of the self-cleaning filter 2: Through the combined use of the automatic flushing self-cleaning method and the first disinfector 1, the filter element clogging and the formation of biofilm can be effectively prevented, the service life of the filter element can be extended, and the frequency of maintenance and replacement of the filter element can be reduced.

[0100] 3. Automatic flushing and self-cleaning: The stirring mechanism is combined with backwashing to effectively clean the filter body 22, remove accumulated impurities, extend the service life of the filter body 22, and reduce maintenance costs. By setting the automatic flushing and self-cleaning mode, impurities adhering to the outside of the filter body 22 can be cleaned, avoiding the trouble of manual cleaning, reducing maintenance costs, and improving convenience.

[0101] 4. Save maintenance costs: Since the service life of the filter element is extended, the automatic flushing and disinfection device reduces the frequency of manual cleaning and replacement of the filter element, thereby reducing the maintenance cost of the system.

[0102] 5. High-efficiency filtration: Through water source pretreatment, coarse filtration and fine filtration multiple filtration mechanisms, it can efficiently remove suspended matter, colloids, organic matter and tiny impurities in the water to ensure pure water quality.

[0103] 6. Improve water quality safety: By setting up multiple disinfection and sterilization devices throughout the water treatment process, bacteria and microorganisms in the water can be effectively killed to prevent them from multiplying in the filter element and the water storage tank 4, thereby ensuring the safety of water quality.

[0104] 7. Material safety: The shaft 25 and the blades 24 are made of food-grade stainless steel to ensure that all parts in contact with water meet safety standards and avoid secondary pollution.

[0105] 8. Improve the automation of the system: Through the automatic control system, the entire direct drinking water system can be automatically controlled, including filter cleaning, disinfection and sterilization, and water quality monitoring, etc., to reduce manual intervention and improve the operating efficiency and stability of the system. The automatic control system realizes real-time monitoring and automatic adjustment of the entire water treatment process, improves the intelligence level of the system, and reduces the complexity and errors of manual operation.

[0106] 9. High reliability: Through practical application and testing, the system has demonstrated efficient and stable operation, good user feedback, safe and reliable water quality, and has good market prospects.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A backwash self-cleaning drinking water system, characterized in that: It comprises a first disinfector (1), a self-cleaning filter (2), a coarse and fine filter buffer component (3) and a water storage tank (4) which are arranged in sequence along the flow direction of the water body; The first sterilizer (1) is used to kill bacteria and microorganisms in raw water; The self-cleaning filter (2) has a backwash water inlet (251), a backwash water outlet (213), a water inlet (211) for receiving the water flow disinfected by the first disinfector (1), and a water outlet (212) connected to the coarse and fine filter buffer assembly (3); The coarse and fine filtering buffer component (3) is used to perform coarse filtering and fine filtering on the water discharged from the water outlet (212) and discharge the water to the water storage tank (4); The coarse and fine filtration buffer assembly (3) comprises a first activated carbon filter (31), a first disc membrane filter (32), an intermediate water tank (33) and a reverse osmosis membrane filter (34) which are arranged in sequence along the flow direction of the water body, and the water outlet of the reverse osmosis membrane filter (34) is connected to the first water inlet of the water storage tank (4); The first disc membrane filter (32) comprises a housing and a reverse osmosis component arranged in the housing, the reverse osmosis component comprising a gasket (321) and a reverse osmosis membrane (322), the gasket (321) and the reverse osmosis membrane (322) both being configured as a plurality of pieces, and the plurality of gaskets (321) and the plurality of reverse osmosis membranes (322) being alternately stacked; The reverse osmosis membrane (322) protrudes from the edge of the gasket (321) in its radial direction, so that a gap is formed between the lower surface of the upper reverse osmosis membrane (322) and the upper surface of the lower reverse osmosis membrane (322); A clean water discharge channel (323) is formed between the middle parts of the plurality of gaskets (321) and the middle parts of the plurality of reverse osmosis membranes (322); The gasket (321) has a protrusion (3211) on its upper surface and a groove on its lower surface, and in two adjacent layers of gaskets (321), the protrusion (3211) in the gasket (321) of the lower layer extends into the groove in the gasket (321) of the upper layer to form a second backwash water inlet channel (324); Each gasket (321) has a backwash water outlet channel (325) connected to the second backwash water inlet channel (324); the outlet of the backwash water outlet channel (325) is located on the outer peripheral surface of the gasket (321); and the reverse osmosis membranes (322) in two adjacent layers of gaskets (321) are sleeved on the outside of the protrusion (3211) of the lower gasket (321).

2. The backwashing self-cleaning direct drinking water system according to claim 1 is characterized in that: The self-cleaning filter (2) comprises a housing (21), a filter body (22), a diaphragm (23) and a stirring mechanism; The diaphragm (23) is located in the housing (21), and the diaphragm (23) divides the housing (21) into a filter chamber located at the top and a water outlet chamber located at the bottom, and the filter body (22) is located in the filter chamber; The housing (21) comprises the water inlet (211), the water outlet (212) and the backwash water outlet (213); the water inlet (211) and the backwash water outlet (213) are both in communication with the filter chamber, and the water outlet (212) is in communication with the water outlet chamber; The stirring mechanism is mounted on the housing (21) and extends into the filter chamber, and comprises the backwash water inlet (251), a water distribution hole (241) for flushing the filter body (22), and a blade (24) for stirring the filter body (22) from bottom to top.

3. The backwashing self-cleaning direct drinking water system according to claim 2 is characterized in that: A filter screen is provided at the outlet of the water distribution hole (241), and the filter screen is used to prevent the filter body (22) from entering the water distribution hole (241).

4. The backwashing self-cleaning direct drinking water system according to claim 2 is characterized in that: The stirring mechanism also includes a driving assembly and a rotating shaft (25); The rotating shaft (25) extends into the housing (21) and is rotatably connected to the housing (21); the blade (24) is connected to the rotating shaft (25) and forms a first backwash water inlet channel (26) with the rotating shaft (25); the top end of the rotating shaft (25) has the backwash water inlet (251) connected to the first backwash water inlet channel (26); the lower surface of the blade (24) has a plurality of water distribution holes (241) connected to the first backwash water inlet channel (26); The driving assembly is connected to the rotating shaft (25) to drive the rotating shaft (25) to rotate.

5. The backwashing self-cleaning direct drinking water system according to claim 4 is characterized in that: The farther away from the axis of the rotating shaft (25) the blade (24) is in the radial direction of the rotating shaft (25), the sparser the distribution of the water distribution holes (241) becomes.

6. The backwashing self-cleaning direct drinking water system according to claim 4 is characterized in that: The water distribution holes (241) include a first water distribution hole (2411) arranged close to the rotating shaft (25), a second water distribution hole (2412) arranged away from the rotating shaft (25), and a third water distribution hole (2413) located between the first water distribution hole (2411) and the second water distribution hole (2412); The first water distribution hole (2411) is arranged toward the rotating shaft (25), the second water distribution hole (2412) is arranged toward the housing (21), and the third water distribution hole (2413) is arranged in a direction parallel to the axial direction of the rotating shaft (25).

7. The backwashing self-cleaning direct drinking water system according to claim 1 is characterized in that: It also comprises a circulating water pipeline (5) and a second disc membrane filter (6) arranged on the circulating water pipeline (5), wherein the water outlet of the second disc membrane filter (6) is connected to the second water inlet of the water storage tank (4).

8. The backwashing self-cleaning direct drinking water system according to claim 7 is characterized in that: It also includes a second disinfector (7), a nutrient mineralization filter element (8) and a second activated carbon filter (9) which are arranged in sequence along the flow direction of the water body, and the second disinfector (7) is used to kill bacteria and microorganisms in the water body discharged from the water storage tank (4).

9. The backwashing self-cleaning direct drinking water system according to claim 8, characterized in that: At least one of the first activated carbon filter (31), the first disc membrane filter (32), the reverse osmosis membrane filter (34), the second disc membrane filter (6), the nutrient mineralization filter element (8) and the second activated carbon filter (9) is provided with a water flow sensor at its water outlet, and at least one of the water outlet is provided with a pressure sensor, and the water flow sensor and the pressure sensor are used to be connected to a central processing unit.

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