CN214437971U

CN214437971U - Reverse osmosis filter element with backwashing function, composite filter element and water purifier

Info

Publication number: CN214437971U
Application number: CN202023352606.1U
Authority: CN
Inventors: 罗庭剑; 陈恩华; 徐威
Original assignee: Guangdong Shuihudun Health Technology Co Ltd
Current assignee: Guangdong Shuihudun Health Technology Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-22
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a reverse osmosis filter core, composite filter element and purifier with back flush function, when the purifier begins to work, raw water enters the primary filter cavity of composite filter core and forms the water purification after primary filter core filters, pure water and dense water are separated out through reverse osmosis filter core filtration, be equipped with pure water play water cavity in the reverse osmosis filter core, pure water fills pure water play water cavity and goes into the pressure water storage cavity of reverse pressure power device to bulldoze the back flush piece, the purifier stops intaking when stopping working, the back flush piece resets under the effect of elasticity and pushes out the pure water in pressure water storage cavity to form the back flush rivers, the back flush rivers flow and let in the dense water separation water route to the reverse osmosis filter core and wash, thoroughly drain the dense water, prevent the dense water from remaining in the reverse osmosis filter core, compared with the prior art, the utility model discloses a purifier realizes the back flush function through the pure water in the reverse osmosis filter core, need not to add other equipment in addition and receive water from the outside and wash, save water and cost greatly reduced.

Description

Reverse osmosis filter element with backwashing function, composite filter element and water purifier

Technical Field

The utility model belongs to the technical field of the water purification technique and specifically relates to adopt composite filter element's purifier.

Background

The water purifier is a water purifying device which purifies water by adopting a multi-stage filter element, removes impurities and certain element substances in water by physical methods such as filtration, adsorption, reverse osmosis and the like, particularly, a reverse osmosis membrane in the filter element can intercept organic pollutants and inorganic ions in the water and filter out direct-drinking pure water.

When crossing the pure water of crossing, reverse osmosis membrane still can appear the higher dense water of salt content, and when the purifier stop work, dense water can remain in the reverse osmosis filter element, and long-time dense water can permeate to reverse osmosis membrane's pure water side, leads to the pure water TDS value of staying in the water purifier to rise by a wide margin, and the easy scale deposit of long-time remaining dense water influences the reverse osmosis membrane life-span. In order to solve the problem, the conventional washing and pure water backflow washing schemes waste more water, and the scheme implementation cost is high.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a composite filter element with a reverse osmosis filter element with a back washing function and a water purifier.

The utility model provides a technical scheme that its technical problem adopted is:

a reverse osmosis filter element with a back flushing function comprises a central cylinder, a reverse osmosis membrane sleeved on the central cylinder, and an upper end cover and a lower end cover which are positioned at two ends, wherein the upper end cover is provided with a concentrated water outlet nozzle, the lower end cover is provided with a water inlet flow passage, a plurality of water through holes are distributed on the side wall of the central cylinder, a pure water outlet cavity is arranged in the central cylinder, and pure water filtered by the reverse osmosis membrane is introduced into the pure water outlet cavity through the water through holes; the pure water outlet cavity is internally provided with a backflushing pressure device, the backflushing pressure device comprises a pressure water storage cavity and a backflushing piece which elastically moves in the pressure water storage cavity, the pressure water storage cavity is communicated with the pure water outlet cavity, the pure water is introduced into the pressure water storage cavity to push and press the backflushing piece, the reverse osmosis membrane stops separating out the pure water, the backflushing piece reversely pushes out the pure water in the pressure water storage cavity into the pure water outlet cavity through elastic reset, backflushing water flows back and is introduced into a concentrated water separation water path of the reverse osmosis membrane.

The recoil pressure device further comprises a barrel with an open end, the pressure water storage cavity is an inner cavity of the barrel, and the recoil part is attached to the side wall of the barrel in a sealing mode.

And a spring is arranged between the recoil piece and the bottom wall of the cylinder body to realize the elastic movement of the recoil piece in the pressure water storage cavity.

The utility model discloses a filter core, including pure water play water cavity, barrel bottom, upper seal cover and barrel bottom, the pure water goes out the intracavity and is equipped with activated carbon filter core, activated carbon filter core is tubulose and its inside pure water play water flow way that forms, and activated carbon filter core upper end is equipped with sealed lid, is equipped with the pure water faucet that communicates pure water play water flow way on the sealed lid, the barrel bottom sets up at activated carbon filter core lower extreme as sealed lid down, by sealed lid and barrel bottom form activated carbon filter core's filter core support on.

The bottom wall of the central cylinder is provided with a cross-shaped prismatic table, an opening of the cylinder body is abutted against the cross-shaped prismatic table, and a water passing flow channel between the pressure water storage cavity and the pure water outlet cavity is formed by vacant positions of the cross-shaped prismatic table.

The water inlet flow passage is provided with a non-return device.

The non-return device comprises a T-shaped silica gel pad and a support erected at the inlet of the filter membrane water inlet channel, wherein the T-shaped silica gel pad comprises a silica gel pad positioned inside the inlet of the water inlet channel and a plug-in column inserted on the support.

The water outlet pipe is arranged in the central cylinder and penetrates out of the concentrated water outlet nozzle, the water outlet pipe is provided with a pure water channel and a concentrated water channel, the water outlet nozzle on the activated carbon filter element is in sealed insertion connection with the pure water channel, and the concentrated water outlet nozzle of the reverse osmosis membrane is communicated with the concentrated water channel.

The utility model provides a composite filter element, includes the casing, be equipped with raw water entry, pure water outlet, dense water export on the casing, and inject primary filter chamber and secondary filter chamber in it through the baffle, be equipped with water inlet and delivery port on the baffle, be equipped with primary filter core in the primary filter chamber, primary filter core is the tube-shape will primary filter chamber separates for raw water runner and water purification runner, primary filter core outside be raw water runner with raw water entry intercommunication, the inboard is water inlet and secondary filter chamber intercommunication on the water purification runner through the baffle, be equipped with foretell reverse osmosis filter core in the secondary filter chamber, the income water runner intercommunication secondary filter chamber of reverse osmosis filter core, dense water faucet is pegged graft with the delivery port is sealed.

A water purifier is provided with the composite filter element.

The utility model has the advantages that: when the water purifier starts to work, raw water enters the primary filter cavity of the composite filter element and is filtered by the primary filter element to form purified water, the purified water enters the secondary filter cavity, the purified water is filtered by the reverse osmosis filter element to separate out pure water and concentrated water, a pure water outlet cavity is arranged in the reverse osmosis filter element, the pure water fills the pure water outlet cavity and enters the pressure water storage cavity of the reverse pressure device to push and press the reverse flushing piece, when purifier stop work intake stop, the recoil piece resets under the effect of elasticity and releases the pure water in pressure water storage chamber and form the recoil rivers, and the recoil rivers backward flow lets in to the dense water of reverse osmosis filter core and washes in appearing the water route, thoroughly discharges away dense water, prevents that dense water from remaining in the reverse osmosis filter core, compares in prior art, the utility model discloses a purifier realizes the backwash function through the pure water of reverse osmosis filter core, need not to add other equipment in addition and washes from the outside water receiving, saves water and cost greatly reduced.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a composite filter element;

FIG. 2 is a schematic disassembled view of the composite filter element;

FIG. 3 is a cross-sectional view of a composite filter element;

FIG. 4 is a schematic diagram of a reverse osmosis cartridge;

FIG. 5 is a schematic structural view of a center cartridge;

FIG. 6 is a structural representation of the bottom of the central cartridge viewed from below;

fig. 7 is a disassembled schematic view of the recoil pressure device.

Detailed Description

Referring to fig. 1 to 2, a housing 1 of the composite filter element is provided with a raw water inlet 101, a pure water outlet 102, and a concentrated water outlet 103, the interior of the housing is partitioned by a partition 11 to define a primary filter chamber 12 and a secondary filter chamber 13, and the partition 11 is provided with a water inlet 111 and a water outlet 112.

The primary filter cavity 12 is internally provided with a primary filter element 2, the primary filter element 2 is in a cylindrical shape and divides the primary filter cavity into a raw water flow passage and a purified water flow passage, the raw water flow passage is arranged on the outer side of the primary filter element 2 and communicated with a raw water inlet 101, and the purified water flow passage is arranged on the inner side and communicated with the secondary filter cavity 13 through a water inlet 111 on the partition plate.

The secondary filter cavity 13 is internally provided with a reverse osmosis filter element 3, the reverse osmosis filter element 3 comprises a central cylinder 4, a reverse osmosis membrane 31 sleeved on the central cylinder 4, an upper end cover 32 and a lower end cover 33 which are positioned at two ends, the upper end cover 32 is provided with a concentrated water outlet nozzle 321, and the lower end cover 33 is provided with a water inlet flow passage 34 communicated with the secondary filter cavity 13. A concentrated water precipitation water path and a pure water precipitation water path are separated from the reverse osmosis filter element 3 through a reverse osmosis membrane 31, the concentrated water precipitation water path is communicated with a concentrated water outlet nozzle 321 to discharge concentrated water, and the concentrated water is communicated to a concentrated water outlet 103 through a water outlet 112 of the partition plate; the pure water precipitation waterway comprises a plurality of water through holes 41 distributed on the side wall of the central cylinder 4 and a pure water outlet cavity 5 inside the central cylinder 4, and the RO filter membrane of the reverse osmosis membrane 31 filters pure water and leads the pure water into the pure water outlet cavity 5 through the water through holes 41 and also leads the pure water to the pure water outlet 102 through the water outlet 112 of the partition plate.

The utility model discloses a composite filter element has the back flush function, and it washes to appear the water route to dense water, avoids dense water to remain in the composite filter element. The back flushing function is realized by a back flushing pressure device 6 arranged in the pure water outlet cavity 5. As shown in fig. 3 to 7, the backflushing pressure device 6 includes a pressure water storage cavity 61 and a backflushing member 62 elastically movable in the pressure water storage cavity 61 through a spring, the pressure water storage cavity 61 is communicated with the pure water outlet cavity 5, when the pure water outlet cavity 5 is filled with pure water, the pure water is introduced into the pressure water storage cavity 61 to push the backflushing member 62, when the reverse osmosis membrane 31 stops separating out the pure water, the backflushing member 62 reversely pushes out the pure water in the pressure water storage cavity 61 into the pure water outlet cavity 5 through elastic reset, a backflushing water flow is formed, the backflushing water flow is reversely introduced into a concentrated water separation water path of the reverse osmosis membrane 31 to be flushed, and the residual concentrated water is discharged out of the reverse osmosis membrane 31 through a concentrated water outlet nozzle 321; because the back washing function is realized through the pure water in the reverse osmosis filter element, the water is not needed to be washed from the outside, and the water is greatly saved.

The recoil pressure device 6 has the following specific structure: including having the open barrel 63 of one end, its inner chamber forms pressure water storage chamber 61, recoil spare 62 is the elastic floating body of sealed laminating barrel 63 lateral wall, is equipped with spring 64 between its and the barrel 63 diapire, realizes recoil spare 62 and is in elastic activity in the pressure water storage chamber 61 pushes up recoil spare 62 in pure water gets into pressure water storage chamber 61, leads to the spring 64 compression, and the recoil force that leans on spring 64 after stopping intaking promotes recoil spare 62, discharges the pure water from pressure water storage chamber 61.

Because the pure water separated out by the RO filter membrane has a peculiar smell and affects the taste of the water, the active carbon filter element 7 is arranged in the pure water outlet cavity 5, and the peculiar smell of the pure water is removed or greatly reduced by filtering the pure water again by the active carbon filter element 7, so that the taste of the water is improved. The activated carbon filter element 7 is tubular, a pure water outlet flow passage 71 is formed in the activated carbon filter element, and the activated carbon filter element is installed and butted by a filter element bracket; the cartridge holder generally comprises an upper and a lower sealing cap, which ensure that water will pass through the activated carbon filter material completely for filtration, and the upper sealing cap is provided with a water outlet through which pure water is discharged, while in this embodiment, the activated carbon cartridge 7 has an upper sealing cap 72, which is formed by the bottom of the cylinder 62 of the above-mentioned backwashing device 6, and which forms the cartridge holder together with the upper sealing cap 72. According to the structure design, the backwashing device 6 is positioned below the activated carbon filter element 7, and the self components are flexibly utilized to become a filter element support of the activated carbon filter element 7, so that the structure in the central cylinder 4 is more compact, the pressure water storage cavity 61 can be set to be larger, and larger backwashing water flow is obtained when the backwashing part 62 rebounds. When the backflushing pressure device 6 is arranged in this way, the opening of the cylinder body 61 faces the bottom wall of the central cylinder 4, in order to ensure that enough water passing channels are provided for pure water to enter the pressure water storage cavity 61, the bottom wall of the central cylinder 4 is provided with the cross-shaped prismoid 42, the opening of the cylinder body 63 abuts against the cross-shaped prismoid 42, and the empty position of the cross-shaped prismoid 42 forms the water passing channel between the pressure water storage cavity 61 and the pure water outlet cavity 5.

Furthermore, in order to ensure that the backflushing water flow is not dispersed and completely flush the concentrated water separation water path, the non-return device 8 is arranged at the water inlet flow channel 34 of the reverse osmosis filter element 3, when the backflushing water flow is discharged from the pure water outlet cavity, the non-return device 8 prevents the backflushing water flow from flowing through the water inlet flow channel 34 and discharging out of the active carbon filter element, and only the concentrated water separation water path can be flushed and discharged through the concentrated water outlet nozzle 321. The non-return device 8 comprises a T-shaped silica gel pad 81 and a support 82 erected at the inlet of the water inlet channel 34, the T-shaped silica gel pad 81 comprises a silica gel pad 811 and an insertion column 812, the support 82 is provided with an insertion hole, the T-shaped silica gel pad 81 is inserted into the support 82 through the insertion column 812, the silica gel pad 811 is located inside the inlet of the water inlet channel 34, and when backflushing water flows back, the backflushing water flows punch the silica gel pad 811 to enable the silica gel pad 811 to cling to the inner side of the inlet of the filter membrane water inlet channel 34 for plugging.

In addition, in order to facilitate the water outlet of the reverse osmosis filter element 3, a water outlet pipe 9 is provided, the water outlet pipe 9 is provided with a pure water channel 91 and a concentrated water channel 92 which are respectively communicated with the pure water outlet and the concentrated water outlet on the shell 1, one end of the water outlet pipe 9 is positioned in the central cylinder 4, the pure water channel 91 is in sealed insertion communication with the pure water outlet 721, the other end of the water outlet pipe passes through the concentrated water outlet 321, when the concentrated water outlet 321 and the water outlet pipe 9 of the reverse osmosis filter element 3 are in sealed insertion communication with the water outlet 112 of the partition plate 11, the side wall of the water outlet pipe 9 is provided with a through hole so that the concentrated water channel 92 is communicated with the concentrated water outlet 321. Through the structural arrangement of above-mentioned outlet pipe, can make reverse osmosis filter core 3 carry out the play water steadily.

The utility model discloses a composite filter element of the utility model is arranged in the water purifier; the construction of the water purifier is known to those of ordinary skill in the art and will not be described in detail herein. The utility model discloses a purifier sets up the utility model discloses a behind the combined filter core, when starting out water at every turn, the TDS value of pure water can both keep at a very low state, does not influence and drinks, and realizes need not to add other equipment parts, greatly reduced manufacturing cost.

Claims

1. A reverse osmosis filter element with a back flushing function comprises a central cylinder (4), a reverse osmosis membrane (31) sleeved on the central cylinder (4), an upper end cover (32) and a lower end cover (33) which are positioned at two ends, wherein the upper end cover (32) is provided with a concentrated water outlet nozzle (321), the lower end cover (33) is provided with a water inlet flow channel (34), a plurality of water through holes (41) are distributed in the side wall of the central cylinder (4), a pure water outlet cavity (5) is formed in the central cylinder (4), and pure water filtered by the reverse osmosis membrane (31) is introduced into the pure water outlet cavity (5) through the water through holes (41); the method is characterized in that: be equipped with recoil pressure device (6) in pure water play water cavity (5), recoil pressure device (6) include pressure water storage chamber (61) and at pressure water storage chamber (61) interior elastic activity's recoil piece (62), pressure water storage chamber (61) intercommunication pure water play water cavity (5), and the pure water lets in pressure water storage chamber (61) and bulldozes in recoil piece (62), reverse osmosis membrane (31) stop appearing the pure water, and recoil piece (62) are through elasticity reset with the pure water in pressure water storage chamber (61) anti-release to pure water play water cavity (5) and form the recoil rivers, and the recoil rivers backward flow lets in to the dense water of reverse osmosis membrane (31) and appear in the water route.

2. A reverse osmosis filter cartridge according to claim 1 wherein: the recoil pressure device (6) further comprises a cylinder body (63) with one open end, the pressure water storage cavity (61) is an inner cavity of the cylinder body (63), and the recoil part (62) is attached to the side wall of the cylinder body (63) in a sealing mode.

3. A reverse osmosis filter cartridge according to claim 2 wherein: a spring (64) is arranged between the recoil piece (62) and the bottom wall of the cylinder body (63) to realize the elastic movement of the recoil piece (62) in the pressure water storage cavity (61).

4. A reverse osmosis filter cartridge according to claim 2 wherein: be equipped with active carbon filter core (7) in pure water play water cavity (5), active carbon filter core (7) are tubulose and its inside pure water play water flow way (71) that forms, and active carbon filter core (7) upper end is equipped with upper seal lid (72), is equipped with pure water faucet (721) that intercommunication pure water goes out water flow way (71) on upper seal lid (72), barrel (63) bottom sets up at active carbon filter core (7) lower extreme as lower sealing lid, by upper seal lid (72) and barrel (63) bottom form the filter core support of active carbon filter core (7).

5. A reverse osmosis filter cartridge according to claim 4 wherein: the bottom wall of the central cylinder (4) is provided with a cross-shaped terrace with edges (42), the opening of the cylinder body (63) is abutted against the cross-shaped terrace with edges (42), and a water passing channel between the pressure water storage cavity (61) and the pure water outlet cavity (5) is formed by the vacancy of the cross-shaped terrace with edges (42).

6. A reverse osmosis filter cartridge according to claim 4 wherein: the water inlet flow passage (34) is provided with a non-return device (8).

7. A reverse osmosis filter cartridge according to claim 6 wherein: contrary device (8) include T type silica gel pad (81) and erect support (82) of entering water runner (34) entrance at the filter membrane, T type silica gel pad (81) are including being located the inside silica gel pad (811) of entering water runner (34) entrance to and cartridge post (812) on support (82) of cartridge.

8. A reverse osmosis filter cartridge according to claim 6 wherein: the water purifier is characterized in that a water outlet pipe (9) penetrates out of a concentrated water outlet nozzle (321) in the central cylinder (4), the water outlet pipe (9) is provided with a pure water channel (91) and a concentrated water channel (92), the pure water outlet nozzle (721) on the activated carbon filter element (7) is in sealed insertion connection with the pure water channel (91), and the concentrated water outlet nozzle (321) of the reverse osmosis membrane (31) is communicated with the concentrated water channel (92).

9. The utility model provides a composite filter element, includes casing (1), be equipped with raw water inlet (101), pure water outlet (102), dense water export (103) on casing (1), and inject primary filter chamber (12) and secondary filter chamber (13) through baffle (11) in it, be equipped with water inlet (111) and delivery port (112) on baffle (11), be equipped with primary filter core (2) in primary filter chamber (12), primary filter core (2) are the tube-shape will primary filter chamber separates for raw water runner and water purification runner, primary filter core (2) outside be raw water runner with raw water inlet intercommunication, inboard water purification runner water inlet (111) and secondary filter chamber intercommunication on the baffle, its characterized in that: the reverse osmosis filter element of any one of the claims 1 to 8 is arranged in the secondary filter cavity (13), the water inlet channel (34) of the reverse osmosis filter element (3) is communicated with the secondary filter cavity (13), and the concentrated water outlet nozzle (321) is in sealed insertion connection with the water outlet (112).

10. A water purifier, which is characterized in that: the composite filter element of claim 9 is arranged in the water purifier.