CN112933989A - Back flush filter core and water purifier waterway system thereof - Google Patents
Back flush filter core and water purifier waterway system thereof Download PDFInfo
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- CN112933989A CN112933989A CN202110154045.4A CN202110154045A CN112933989A CN 112933989 A CN112933989 A CN 112933989A CN 202110154045 A CN202110154045 A CN 202110154045A CN 112933989 A CN112933989 A CN 112933989A
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- filter element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/06—Tubular membrane modules
- B01D63/062—Tubular membrane modules with membranes on a surface of a support tube
- B01D63/065—Tubular membrane modules with membranes on a surface of a support tube on the outer surface thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a backwashing filter element and a water purifier waterway system thereof.A wastewater channel is formed by the outer wall of an RO membrane and the inner wall of a shell; the edge of the upper cover extends downwards to form a sealing part; a gap is reserved between the bottom surface of the upper cover and the top of the RO membrane, and the sealing part is tightly attached to the side wall of the top of the RO membrane; the middle part of the upper cover is provided with a central hole, and the top of the RO membrane is communicated with the water inlet through the central hole; the central tube penetrates through the central hole and is connected with the water outlet; the upper cover is provided with a waste water hole, one end of the waste water hole is communicated to the outer wall of the sealing part, the other end of the waste water hole is communicated to the top surface of the upper cover, and the waste water channel is communicated with the waste water port through the waste water hole; the air bag assembly is arranged at the bottom of the RO membrane filter core; the air bag component is provided with a back washing interface which is connected with the lower end of the central pipe; the air bag assembly is used for storing pressure and releasing the pressure when the RO membrane filter element is standby. This application can carry out the backwash to the RO membrane when the back flush filter core standby to the TDS value of first section play water when reducing the water intaking of next time.
Description
Technical Field
The invention relates to the technical field of filtering equipment, in particular to a backwashing filter element and a waterway system of a water purifier thereof.
Background
At present, with the development of society, people pay more and more attention to health problems, and as tap water contains a lot of substances which are not beneficial to health, more and more people can set water purifying equipment at home to filter the tap water; most of the existing water purifying equipment adopts an RO (reverse osmosis) membrane filter element for filtration, but in the standby process of the water purifying equipment, because tap water, waste water and pure water exist in the RO membrane filter element at the same time, wherein the raw water and the waste water are both in front of a membrane of the RO membrane filter element, the pure water is behind the membrane of the RO membrane filter element, and the Total Dissolved Solids (TDS) value in the tap water and the waste water is far higher than the TDS value of the pure water, when the water purifying equipment is in a standby state for a long time, ions in the tap water and the waste water can be gradually diffused into the pure water, so that the TDS value of the pure water is increased; when starting the water purification unit next time, the TDS value of its anterior segment play water can be than higher, influences user's health, consequently, how to reduce the TDS value of the first segment play water after RO membrane purifier awaits the opportune moment for a long time and become the problem that needs to solve.
Disclosure of Invention
The invention aims to provide a backwashing filter element and a waterway system of a water purifier thereof, so as to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a backwashing filter element comprises a shell, an RO membrane filter element, an upper cover, an air bag assembly and a bottom cover; the RO membrane filter element, the upper cover and the air bag assembly are all arranged in the shell, and the bottom cover is arranged at the bottom of the shell;
the top of the shell is provided with a water inlet, a water outlet and a wastewater port, and the bottom of the shell is of an open structure;
the RO membrane filter element comprises an RO membrane and a central tube, the RO membrane is wrapped outside the central tube, and the side wall of the central tube is provided with a plurality of pure water holes; the outer wall of the RO membrane and the inner wall of the shell form a wastewater channel;
the edge of the upper cover extends downwards to form a sealing part; the upper cover is arranged at the top of the RO membrane filter element, a gap is reserved between the bottom surface of the upper cover and the top of the RO membrane, and the sealing part is tightly attached to the side wall of the top of the RO membrane; the middle part of the upper cover is provided with a central hole, and the top of the RO membrane is communicated with the water inlet through the central hole; the central pipe penetrates through the central hole and is connected with the water outlet; the upper cover is provided with a waste water hole, one end of the waste water hole is communicated to the outer wall of the sealing part, the other end of the waste water hole is communicated to the top surface of the upper cover, and the waste water channel is communicated with the waste water port through the waste water hole;
the air bag assembly is arranged at the bottom of the RO membrane filter element; the air bag assembly is provided with a back washing interface, and the back washing interface is connected with the lower end of the central pipe; the air bag assembly is used for storing pressure and releasing the pressure when the RO membrane filter element is standby;
the bottom cover is arranged at the bottom of the shell to close the shell.
Preferably, the airbag module includes an airbag housing, a lower cover, and an airbag;
the inside of the air bag shell is provided with a pressure storage cavity, the top of the air bag shell is provided with the back flush interface, the top surface of the air bag shell is provided with a plurality of second support ribs, and the top surfaces of the second support ribs are abutted against the bottom surface of the RO membrane;
the air bag is arranged in the pressure storage cavity;
the lower cover is arranged at the bottom of the air bag shell to seal the air bag shell.
Preferably, a reverse osmosis check valve is arranged inside the reverse washing interface, a mounting ring is arranged in the reverse washing interface, a reverse washing hole is formed in the top of the mounting ring, and the reverse osmosis check valve is arranged in the mounting ring; the reverse osmosis check valve comprises a valve body, a valve core and a spring, wherein a guide ring and a connecting strip are arranged at the lower part of the valve body, and the outer wall of the guide ring is connected with the inner wall of the valve body through the connecting strip; the valve core comprises a water stop part and a sliding rod part, the upper end of the sliding rod part is connected with the bottom surface of the water stop part, and the sliding rod part is connected with the inner part of the guide ring in a sliding manner; the spring is sleeved on the outer side of the sliding rod part, the top of the spring abuts against the bottom surface of the water stop part, and the bottom of the spring abuts against the top surface of the connecting strip; the top of the valve body is provided with a limiting convex ring, and the side wall of the limiting convex ring is provided with a plurality of water seepage holes; the side wall of the water stop part is an inclined surface facing the limit convex ring; the spring is used for applying force to the bottom surface of the water stopping part so as to enable the water stopping part to be tightly abutted to the bottom of the limiting convex ring.
Preferably, the top surface of the lower cover is provided with a limiting ring, and the lower cover is provided with an annular groove outside the limiting ring; the lower part of the air bag shell is provided with a pressing step; the bottom edge of the air bag extends outwards; the bottom edge of the air bag surrounds the outer side of the limiting ring, the bottom of the air bag shell is inserted into the annular groove, and the pressing step presses the bottom edge of the air bag to the top surface of the lower cover.
Preferably, the device also comprises a rear carbon rod, a carbon rod upper cover and a carbon rod lower cover; the rear carbon rod is arranged in the central tube, and the rear carbon rod is hollow; the upper carbon rod cover is arranged at the upper end of the rear carbon rod, and the lower carbon rod cover is arranged at the lower end of the rear carbon rod and seals the lower end of the rear carbon rod; the carbon rod upper cover is characterized in that a water outlet connector is arranged in the middle of the carbon rod upper cover, a sealing ring is arranged between the outer wall of the water outlet connector and the inner wall of the upper portion of the central pipe, and the water outlet connector is communicated with the water outlet.
Preferably, the top of the back flush interface is provided with a third support rib, and the top of the third support rib abuts against the bottom surface of the carbon rod lower cover.
Preferably, the water outlet is provided with a check valve, and the waste water hole is provided with a check valve.
Preferably, the middle part of the lower cover is provided with an air tap, and the air tap is used for inflating the air bag.
Preferably, the top of the air bag shell is provided with a positioning ring, the outer wall of the positioning ring is provided with a plurality of positioning lugs, the positioning lugs are abutted against the inner wall of the shell, and the outer wall of the bottom of the RO membrane is inserted into the positioning ring.
A water purifier waterway system comprises a preposed filter element, a water inlet valve, a supercharging device, a waste water valve, a check valve, a high-pressure switch, a water outlet device and the backwashing filter element;
the water inlet end of the water inlet valve is connected with the water outlet end of the pre-filter element, the water inlet end of the supercharging device is connected with the water outlet end of the water inlet valve, the water inlet is connected with the water outlet end of the supercharging device, the water outlet is connected with the water inlet end of the check valve, the water outlet end of the check valve is connected with the water inlet end of the water outlet device, and the high-pressure switch is arranged between the check valve and the water outlet device; the waste water valve is connected with the waste water port.
The invention has the beneficial effects that: the air bag assembly is arranged in the backwashing filter element, so that the RO membrane can be backwashed by using high-pressure pure water in the air bag assembly when the backwashing filter element is standby, the problem that the TDS value of first-stage effluent is high when water is taken next time due to long-time standby is solved, the backwashing is not required to depend on an external water channel structure, and the compatibility is better; in addition, the air bag assembly is integrated in the backwashing filter element, so that the conventional water purifying equipment can be conveniently transformed to have a backwashing function, the popularization range is large, and the huge social and economic benefits are achieved. In addition, this application still sets up the back permeation check valve in the inside of back flush interface, consequently can play the guard action to the RO membrane filter core effectively, reduces the backpressure that bears when the back flush to the RO membrane filter core to the life of extension RO membrane is showing.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic diagram of the overall construction of one embodiment of a backwash filter cartridge of the present invention;
FIG. 2 is a schematic perspective view of a cover according to one embodiment of the present invention;
FIG. 3 is a schematic perspective view of an alternative perspective of the cover according to one embodiment of the present invention;
FIG. 4 is a schematic perspective view of an airbag housing according to one embodiment of the invention;
FIG. 5 is a schematic diagram of a reverse osmosis check valve according to one embodiment of the present invention;
FIG. 6 is a schematic view of a waterway system of a water purifier according to one embodiment of the present invention;
in the drawings: 1-shell, 11-water inlet, 12-water outlet, 121-check valve, 13-waste water inlet, 14-waste water channel, 2-RO membrane filter element, 21-RO membrane, 22-central tube, 3-upper cover, 32-sealing part, 33-central hole, 34-waste water hole, 35-one-way valve, 4-air bag component, 41-air bag shell, 411-back flushing interface, 4111-back flushing hole, 412-pressure storage cavity, 413-second support rib, 414-mounting ring, 415-pressing step, 416-third support rib, 417-positioning ring, 418-positioning lug, 42-lower cover, 421-limiting ring, 422-annular groove, 423-air nozzle, 43-air bag, 44-reverse osmosis check valve, 441-valve body, 4411-guide ring, 4412-connecting bar, 4413-limit convex ring, 4414-water seepage hole, 442-valve core, 4421-water stop part, 4422-slide bar part, 443-spring, 5-bottom cover, 6-rear carbon rod, 7-carbon rod upper cover, 71-water outlet joint, 8-carbon rod lower cover, 9-sealing ring, 10-back flushing filter element, 20-front filter element, 30-water inlet valve, 40-supercharging device, 50-waste water valve, 60-check valve, 70-high pressure switch and 80-water outlet device.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The backwashing filter element 10 comprises a shell 1, an RO membrane filter element 2, an upper cover 3, an air bag component 4 and a bottom cover 5; the RO membrane filter element 2, the upper cover 3 and the air bag assembly 4 are all arranged in the shell 1, and the bottom cover 5 is arranged at the bottom of the shell 1;
the top of the shell 1 is provided with a water inlet 11, a water outlet 12 and a waste water outlet 13, and the bottom of the shell 1 is of an open structure;
the RO membrane filter element 2 comprises an RO membrane 21 and a central tube 22, the RO membrane 21 is wrapped outside the central tube 22, and the side wall of the central tube 22 is provided with a plurality of pure water holes; the outer wall of the RO membrane 21 and the inner wall of the shell 1 form a waste water channel 14;
the edge of the upper cover 3 extends downwards to form a sealing part 32; the upper cover 3 is arranged on the top of the RO membrane filter element 2, a gap is reserved between the bottom surface of the upper cover 3 and the top of the RO membrane 21, and the sealing part 32 is tightly attached to the side wall of the top of the RO membrane 21; the middle part of the upper cover 3 is provided with a central hole 33, and the top of the RO membrane 21 is communicated with the water inlet 11 through the central hole 33; the central tube 22 passes through the central hole 33 and is connected with the water outlet 12; the upper cover 3 is provided with a waste water hole 34, one end of the waste water hole 34 is communicated to the outer wall of the sealing part 32, the other end is communicated to the top surface of the upper cover 3, and the waste water channel 14 is communicated with the waste water port 13 through the waste water hole 34;
the air bag assembly 4 is arranged at the bottom of the RO membrane filter element 2; the air bag assembly 4 is provided with a back washing interface 411, and the back washing interface 411 is connected with the lower end of the central pipe 22; the air bag assembly 4 is used for storing pressure and releasing the pressure when the RO membrane filter element 2 is standby;
the bottom cover 5 is disposed at the bottom of the housing 1 to close the housing 1.
During water production, raw water or primary filtered water enters from the water inlet 11 and then enters the top of the RO membrane 21 from the central hole 33, and a space is reserved between the bottom surface of the upper cover 3 and the top of the RO membrane 21, so that the raw water or the primary filtered water can smoothly flow to the top of the RO membrane 21; the raw water or the primary filtered water entering the top of the RO membrane 21 flows into the RO membrane 21 for filtration, and the filtered water flows into the central tube 22 from pure water holes on the side wall of the central tube 22, then flows upwards along the central tube 22, and flows out from the water outlet 12; because the bottom of the central tube 22 is communicated with the air bag module 4 through the back flushing port 411, part of pure water in the central tube 22 flows into the air bag module 4; and the wastewater generated during the filtration flows out from the bottom of the RO membrane 21 and flows to the wastewater port 13 along the wastewater channel 14 and the wastewater hole 34; the sealing part 32 is closely attached to the top side wall of the RO membrane 21, and can separate the space at the top of the RO membrane 21 from the wastewater channel 14, so as to prevent wastewater in the wastewater channel 14 from flowing back to the top of the RO membrane 21; of course, in order to ensure the sealing property, a waterproof tape may be wound around the sealing portion 32 and the top sidewall of the RO membrane 21 for a plurality of turns to improve the sealing property; when the water outlet 12 is closed, because the water purification system does not reach the pressure threshold, raw water or primary filtered water is continuously introduced into the RO membrane filter element 2, the RO membrane filter element 2 continuously performs water production, and because the water outlet 12 is closed, pure water is stored in the air bag component 4, and the pressure in the air bag component 4 is gradually increased; after water purification system's pressure reached the pressure threshold value, water purification system gets into standby state, pure water in gasbag subassembly 4 this moment is because pressure is higher, and the pressure of water inlet 11 department is lower, therefore the pure water in the gasbag subassembly 4 begins the reverse flow, and carry out the backwash through the pure water pore pair RO membrane 21 of center tube 22, so that the waste water in the back flush filter core 10 is discharged from waste water outlet 13, avoid at the in-process of standby, the membrane front waste water that is located RO membrane 21 causes the pollution to the pure water behind the membrane through the osmosis, and then guarantee when next water intaking, the TDS value of first section play water keeps at lower level. The utility model provides a back flush filter core 10 need not to rely on outside water route structure to realize the back flush to RO membrane 21, it is compatible better, can reform transform current water purification system, because traditional water purification system need realize carrying out the back flush to RO membrane filter core 2, must reform transform the water route to water purification system, therefore the back flush function can only be applicable to new purifier, and a back flush filter core 10 of this application is integrated to RO membrane filter core 2 with gasbag subassembly 4 in, only need install the back flush filter core 10 of this application in current water purification system, can realize carrying out the function of back flush to RO membrane 21 at the in-process of standby, need not to reform transform the water route to water purification system, therefore it is very convenient to use, huge social economic value has.
Further, the airbag module 4 includes an airbag housing 41, a lower cover 42, and an airbag 43;
the inside of the air bag shell 41 is provided with a pressure storage cavity 412, the top of the air bag shell 41 is provided with the back flush interface 411, the top surface of the air bag shell 41 is provided with a plurality of second support ribs 413, and the top surfaces of the second support ribs 413 are abutted against the bottom surface of the RO membrane 21;
the bladder 43 is disposed within the pressure storage cavity 412;
the lower cover 42 is provided at the bottom of the airbag housing 41 to close the airbag housing 41.
The air bag 43 is arranged inside the air bag shell 41, the air bag 43 stores pressure by contraction and releases the pressure by expansion, when the pressure of pure water entering the air bag assembly 4 through the backwashing connector 411 is high, the air bag 43 is extruded, so that the air bag is gradually contracted, and the pressure is stored; when the backwashing filter element 10 enters a standby state and stops water production, the air bag 43 gradually expands to extrude pure water in the air bag assembly 4 to the central tube 22 so as to perform backwashing on the RO membrane 21; the second support ribs 413 serve to support the RO membrane 21 so that wastewater within the RO membrane 21 can flow out from the bottom of the RO membrane 21 to the wastewater channel 14.
Further, a reverse osmosis check valve 44 is arranged inside the back washing interface 411, a mounting ring 414 is arranged inside the back washing interface 411, a back washing hole 4111 is arranged at the top of the mounting ring 414, and the reverse osmosis check valve 44 is arranged inside the mounting ring 414; the reverse osmosis check valve 44 comprises a valve body 441, a valve core 442 and a spring 443, wherein the lower part of the valve body 441 is provided with a guide ring 4411 and a connecting strip 4412, and the outer wall of the guide ring 4411 is connected with the inner wall of the valve body 441 through the connecting strip 4412; the valve core 442 comprises a water stop portion 4421 and a slide rod portion 4422, wherein the upper end of the slide rod portion 4422 is connected with the bottom surface of the water stop portion 4421, and the slide rod portion 4422 is connected with the inside of the guide ring 4411 in a sliding manner; the spring 443 is sleeved outside the sliding rod portion 4422, the top of the spring 443 abuts against the bottom surface of the water stopping portion 4421, and the bottom of the spring 443 abuts against the top surface of the connecting bar 4412; the top of the valve body 441 is provided with a limit convex ring 4413, and the side wall of the limit convex ring 4413 is provided with a plurality of water seepage holes 4414; the side wall of the water stop part 4421 is an inclined surface facing the limit convex ring 4413; the spring 443 is used for applying force to the bottom surface of the water stopping portion 4421, so that the water stopping portion 4421 abuts against the bottom of the limiting convex ring 4413.
The reverse osmosis check valve 44 is arranged in the reverse washing interface 411, in the normal water making process of the water purification system, pure water filtered by the RO membrane filter element 2 flows into the air bag component 4 from the lower end of the central pipe 22, at the moment, the reverse osmosis check valve 44 is in forward conduction, and because the water pressure in the central pipe 22 is higher in the normal water making process, the water stopping part 4421 can be pushed to overcome the elasticity of the spring 443 and move downwards, so that the water stopping part 4421 is far away from the limiting convex ring 4413 to open the reverse washing interface 411, the reverse osmosis check valve 44 can realize large-flow conduction in the normal water making process, and further, a large amount of pure water can enter the air bag component 4 to realize pressure storage; in the standby process, the pure water stored in the air bag module 4 starts to flow to the central tube 22, at this time, the pure water in the air bag module 4 presses the water stop part 4421 against the limit convex ring 4413, at this time, the pure water in the air bag module 4 can only seep out from a gap between the water stop part 4421 and the permeation hole on the side wall of the limit convex ring 4413, and the water passing area is small, so that the water pressure and the flow rate of the pure water can be effectively reduced, and therefore, in the reverse flushing process, the pressure of the pure water entering the central tube 22 from the air bag module 4 is extremely low, the back pressure born by the RO membrane 21 can be reduced as much as possible, a good protection effect on the RO membrane 21 is achieved, the RO membrane filter element 2 can have a long service life in the long reverse flushing process, and the use cost of a user can.
Further, a limit ring 421 is arranged on the top surface of the lower cover 42, and an annular groove 422 is arranged outside the limit ring 421 on the lower cover 42; the lower part of the air bag shell 41 is provided with a pressing step 415; the bottom edge of the bladder 43 extends outwardly; the bottom edge of the air bag 43 surrounds the outer side of the limit ring 421, the bottom of the air bag housing 41 is inserted into the annular groove 422, and the pressing step 415 presses the bottom edge of the air bag 43 against the top surface of the lower cover 42.
The arrangement can press the edge of the air bag 43 through the air bag shell 41, so that the air bag 43 and the top surface of the lower cover 42 form a sealed space, and when the air bag is filled with air, the air bag is not easy to leak from the peripheral edge of the air bag 43. The limiting ring 421 can limit the edge of the airbag 43, prevent the edge of the airbag 43 from deforming inward due to pressure, and improve the air tightness.
Further, the device also comprises a rear carbon rod 6, a carbon rod upper cover 7 and a carbon rod lower cover 8; the rear carbon rod 6 is arranged inside the central tube 22, and the rear carbon rod 6 is hollow; the upper carbon rod cover 7 is arranged at the upper end of the rear carbon rod 6, and the lower carbon rod cover 8 is arranged at the lower end of the rear carbon rod 6 and seals the lower end of the rear carbon rod 6; a water outlet joint 71 is arranged in the middle of the carbon rod upper cover 7, a sealing ring 9 is arranged between the outer wall of the water outlet joint 71 and the inner wall of the upper part of the central pipe 22, and the water outlet joint 71 is communicated with the water outlet 12.
The post-positioned carbon rod 6 is arranged in the central tube 22, so that the space in the central tube 22 can be fully utilized to perform post-filtering on pure water, and the sealing ring 9 is arranged between the outer wall of the water outlet joint 71 of the carbon rod upper cover 7 and the inner wall of the central tube 22, so that the pure water in the central tube 22 can flow out of the water outlet 12 after being filtered by the post-positioned carbon rod 6, and the taste of the discharged water is ensured.
Further, a third supporting rib 416 is arranged at the top of the backwashing interface 411, and the top of the third supporting rib 416 abuts against the bottom surface of the carbon rod lower cover 8.
The third support ribs 416 may support the carbon rod lower cover 8, so as to prevent the carbon rod lower cover 8 from plugging the backwashing interfaces 411, so that pure water in the air bag module 4 cannot back flush the RO membrane 21. And the third support rib 416 can play an axial positioning effect on the rear carbon rod 6, so as to prevent the upper carbon rod cover 7 from loosening from the central tube 22 after the rear carbon rod 6 is impacted.
Further, the water outlet 12 is provided with a check valve 121, and the waste water hole 34 is provided with a check valve 35.
The water outlet 12 is provided with a check valve 121, when the backwashing filter element 10 is inserted into the water purifying equipment, the check valve 121 is matched with the water purifying equipment, so that the check valve 121 is opened, and the water outlet 12 is communicated with the water purifying equipment; when the backwashing filter element 10 is taken down from the water purifying equipment, the check valve 121 is closed at the moment, so that water in the backwashing filter element 10 cannot flow out from the water outlet 12; the waste hole 34 is provided with a one-way valve 35 to ensure that waste water can only flow out from the inside of the filter element in one way, so as to prevent the waste water from the outside from flowing back to the inside of the filter element.
Further, a gas nipple 423 is disposed at the middle of the lower cover 42, and the gas nipple 423 is used for inflating the air bag 43.
The air bag 43 can be conveniently inflated through the air nipple 423 to maintain the air pressure in the air bag 43 within a certain pressure range.
Further, a positioning ring 417 is arranged at the top of the airbag housing 41, a plurality of positioning protrusions 418 are arranged on the outer wall of the positioning ring 417, the positioning protrusions 418 are tightly abutted against the inner wall of the housing 1, and the outer wall of the bottom of the RO membrane 21 is inserted into the positioning ring 417.
The positioning ring 417 can play a role in radial positioning for the air bag housing 41 and the RO membrane filter cartridge 2, thereby avoiding the problem that the air bag module 4 and the RO membrane filter cartridge 2 shake when being impacted, and enabling the air bag module 4 and the RO membrane filter cartridge 2 to obtain a better positioning effect in the housing 1.
A water purifier waterway system comprises a preposed filter element 20, a water inlet valve 30, a supercharging device 40, a waste water valve 50, a check valve 60, a high-pressure switch 70, a water outlet device 80 and the backwashing filter element 10;
the water inlet end of the water inlet valve 30 is connected with the water outlet end of the pre-filter element 20, the water inlet end of the supercharging device 40 is connected with the water outlet end of the water inlet valve 30, the water inlet 11 is connected with the water outlet end of the supercharging device 40, the water outlet 12 is connected with the water inlet end of the check valve 60, the water outlet end of the check valve 60 is connected with the water inlet end of the water outlet device 80, and the high-pressure switch 70 is arranged between the check valve 60 and the water outlet device 80; the waste valve 50 is connected to the waste port 13.
When the water taking device is started, the water inlet valve 30 and the supercharging device 40 are started, raw water enters from the water inlet end of the preposed filter element 20, and then primary filtered water flows out from the water outlet end of the preposed filter element 20; then the primary filtered water passes through the water inlet valve 30 and the supercharging device 40 in sequence and flows in from the water inlet 11 of the filter element, then the pure water flows out from the water outlet 12, and the waste water can flow out from the waste water port 13; then, the pure water flows out of the water taking device after passing through the check valve 60 and the high-voltage switch 70, so that water making is finished; after the water taking device is closed, because the pressure between the check valve 60 and the water taking device does not reach the pressure threshold value of the high-pressure switch 70, the water inlet valve 30 and the supercharging device 40 continue to be kept in the starting state, so that the waterway system of the water purifier can continue to make water, at the moment, because the water taking device is closed, the made pure water in the water can enter the air bag component 4, so that the pressure in the air bag component 4 is continuously increased, of course, the water pressure between the check valve 60 and the water taking device can also continuously rise, and when the pressure between the check valve 60 and the water taking device reaches the pressure threshold value of the high-pressure switch 70, the high-pressure switch 70 controls the water inlet valve 30 and the supercharging device 40 to; at this time, as the waterway system of the water purifier enters a standby state, and the high-pressure pure water in the air bag assembly 4 starts to reversely flow, the wastewater in the RO membrane 21 is discharged through the wastewater outlet 13, so as to avoid the problem that the TDS value of the first-stage effluent is high due to the residual wastewater in the RO membrane 21; since the high pressure switch 70 is located between the check valve 60 and the water intake device, the high pressure state can be continuously maintained during the standby process, so that the water intake valve 30 and the supercharging device 40 are closed; when the water intake device is turned on again, the high pressure switch 70 controls the water inlet valve 30 and the pressurizing device 40 to be started again because the high pressure switch 70 detects that the pressure of the waterway is reduced, and the water production is restarted.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Other embodiments of the invention will occur to those skilled in the art without the exercise of inventive faculty based on the explanations herein, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A backwash filter element is characterized in that: comprises a shell, an RO membrane filter element, an upper cover, an air bag component and a bottom cover; the RO membrane filter element, the upper cover and the air bag assembly are all arranged in the shell, and the bottom cover is arranged at the bottom of the shell;
the top of the shell is provided with a water inlet, a water outlet and a wastewater port, and the bottom of the shell is of an open structure;
the RO membrane filter element comprises an RO membrane and a central tube, the RO membrane is wrapped outside the central tube, and the side wall of the central tube is provided with a plurality of pure water holes; the outer wall of the RO membrane and the inner wall of the shell form a wastewater channel;
the edge of the upper cover extends downwards to form a sealing part; the upper cover is arranged at the top of the RO membrane filter element, a gap is reserved between the bottom surface of the upper cover and the top of the RO membrane, and the sealing part is tightly attached to the side wall of the top of the RO membrane; the middle part of the upper cover is provided with a central hole, and the top of the RO membrane is communicated with the water inlet through the central hole; the central pipe penetrates through the central hole and is connected with the water outlet; the upper cover is provided with a waste water hole, one end of the waste water hole is communicated to the outer wall of the sealing part, the other end of the waste water hole is communicated to the top surface of the upper cover, and the waste water channel is communicated with the waste water port through the waste water hole;
the air bag assembly is arranged at the bottom of the RO membrane filter element; the air bag assembly is provided with a back washing interface, and the back washing interface is connected with the lower end of the central pipe; the air bag assembly is used for storing pressure and releasing the pressure when the RO membrane filter element is standby;
the bottom cover is arranged at the bottom of the shell to close the shell.
2. The backwash filter element as defined in claim 1, wherein: the air bag assembly comprises an air bag shell, a lower cover and an air bag;
the inside of the air bag shell is provided with a pressure storage cavity, the top of the air bag shell is provided with the back flush interface, the top surface of the air bag shell is provided with a plurality of second support ribs, and the top surfaces of the second support ribs are abutted against the bottom surface of the RO membrane;
the air bag is arranged in the pressure storage cavity;
the lower cover is arranged at the bottom of the air bag shell to seal the air bag shell.
3. The backwash filter element as defined in claim 2, wherein: a reverse osmosis check valve is arranged inside the reverse washing interface, a mounting ring is arranged in the reverse washing interface, a reverse washing hole is formed in the top of the mounting ring, and the reverse osmosis check valve is arranged in the mounting ring; the reverse osmosis check valve comprises a valve body, a valve core and a spring, wherein a guide ring and a connecting strip are arranged at the lower part of the valve body, and the outer wall of the guide ring is connected with the inner wall of the valve body through the connecting strip; the valve core comprises a water stop part and a sliding rod part, the upper end of the sliding rod part is connected with the bottom surface of the water stop part, and the sliding rod part is connected with the inner part of the guide ring in a sliding manner; the spring is sleeved on the outer side of the sliding rod part, the top of the spring abuts against the bottom surface of the water stop part, and the bottom of the spring abuts against the top surface of the connecting strip; the top of the valve body is provided with a limiting convex ring, and the side wall of the limiting convex ring is provided with a plurality of water seepage holes; the side wall of the water stop part is an inclined surface facing the limit convex ring; the spring is used for applying force to the bottom surface of the water stopping part so as to enable the water stopping part to be tightly abutted to the bottom of the limiting convex ring.
4. The backwash filter element as defined in claim 2, wherein: the top surface of the lower cover is provided with a limiting ring, and the lower cover is provided with an annular groove outside the limiting ring; the lower part of the air bag shell is provided with a pressing step; the bottom edge of the air bag extends outwards; the bottom edge of the air bag surrounds the outer side of the limiting ring, the bottom of the air bag shell is inserted into the annular groove, and the pressing step presses the bottom edge of the air bag to the top surface of the lower cover.
5. The backwash filter element as defined in claim 1, wherein: the device also comprises a rear carbon rod, a carbon rod upper cover and a carbon rod lower cover; the rear carbon rod is arranged in the central tube, and the rear carbon rod is hollow; the upper carbon rod cover is arranged at the upper end of the rear carbon rod, and the lower carbon rod cover is arranged at the lower end of the rear carbon rod and seals the lower end of the rear carbon rod; the carbon rod upper cover is characterized in that a water outlet connector is arranged in the middle of the carbon rod upper cover, a sealing ring is arranged between the outer wall of the water outlet connector and the inner wall of the upper portion of the central pipe, and the water outlet connector is communicated with the water outlet.
6. The backwash filter element as defined in claim 5, wherein: and the top of the back washing interface is provided with a third supporting rib, and the top of the third supporting rib is tightly propped against the bottom surface of the lower carbon rod cover.
7. The backwash filter element as defined in claim 1, wherein: the water outlet is provided with a check valve, and the waste water hole is provided with a one-way valve.
8. The backwash filter element as defined in claim 2, wherein: and the middle part of the lower cover is provided with an air tap which is used for inflating the air bag.
9. The backwash filter element as defined in claim 2, wherein: the top of the air bag shell is provided with a positioning ring, the outer wall of the positioning ring is provided with a plurality of positioning lugs, the positioning lugs are tightly propped against the inner wall of the shell, and the outer wall of the bottom of the RO membrane is inserted into the positioning ring.
10. A water purifier waterway system is characterized in that: comprising a pre-filter element, a water inlet valve, a pressure boosting device, a waste water valve, a check valve, a high-pressure switch, a water outlet device and a back-flushing filter element as claimed in any one of claims 1 to 9;
the water inlet end of the water inlet valve is connected with the water outlet end of the pre-filter element, the water inlet end of the supercharging device is connected with the water outlet end of the water inlet valve, the water inlet is connected with the water outlet end of the supercharging device, the water outlet is connected with the water inlet end of the check valve, the water outlet end of the check valve is connected with the water inlet end of the water outlet device, and the high-pressure switch is arranged between the check valve and the water outlet device; the waste water valve is connected with the waste water port.
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| CN202110154045.4A CN112933989B (en) | 2021-02-04 | 2021-02-04 | Back flush filter core and water purifier waterway system thereof |
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| CN202110154045.4A CN112933989B (en) | 2021-02-04 | 2021-02-04 | Back flush filter core and water purifier waterway system thereof |
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| CN112933989B CN112933989B (en) | 2023-03-24 |
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| CN114014453A (en) * | 2021-10-29 | 2022-02-08 | 佛山市顺德区盈沣泰环保科技有限公司 | Filter equipment who contains sealing washer that divides water |
| CN114409017A (en) * | 2022-01-06 | 2022-04-29 | 佛山市美的清湖净水设备有限公司 | Filter core and water purification system |
| CN114014453B (en) * | 2021-10-29 | 2024-04-30 | 佛山市顺德区盈沣泰环保科技有限公司 | Filter device with water diversion sealing ring |
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|---|---|
| CN112933989B (en) | 2023-03-24 |
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