CN211936398U - Filter equipment and filtration system - Google Patents

Abstract

The utility model discloses a filtering device and a filtering system, wherein the filtering device comprises a shell, a filter element, a raw water passing path, a pure water passing path and a concentrated water passing path, the raw water passing path comprises a raw water inlet arranged on the shell, the pure water passing path comprises a central tube arranged in the filter element and a pure water outlet arranged on the shell, the concentrated water passing path comprises a concentrated water outlet arranged on the shell, the bottom end of the filter element is communicated with the raw water passing path for raw water to enter, and the top end of the filter element is communicated with the concentrated water passing path for concentrated water to discharge; in addition, the water storage component is also included; the water storage part is communicated with the raw water passing channel, stores raw water when the filtering device runs, and pushes the stored raw water to enter the filter element through the bottom end of the filter element to be washed when the filtering device stops. Adopt the filter equipment and the filtration system of above-mentioned structure, deposit water recoil filter core through the water storage part, can effectively reduce the TDS value of first cup of water, extension filter core life.

Description

Filter equipment and filtration system

Technical Field

The utility model relates to a filter core technical field, concretely relates to filter equipment and filtration system.

Background

The main component of the reverse osmosis water purification device is a reverse osmosis membrane filter element which generally has three water channel inlets and outlets: the water inlet, the pure water delivery port and the dense water delivery port, its structure generally includes core, filter core shell and center tube, and the core forms around the center tube winding, and the filter core shell sets up at the core lateral wall, makes the raw water can only get into from filter core one end, and the dense water can only flow from the filter core other end, and the center tube wall is equipped with a plurality of water holes of crossing simultaneously for receive the pure water. Through pressurizing water inlet one side, make municipal administration running water get into in the filter core through the water inlet, filter the running water through reverse osmosis membrane again to discharge the pure water that obtains filtering to storage water tank or tap through the pure water delivery port, various heavy metal ions, impurity and harmful substance that can't pierce through reverse osmosis membrane etc. gather in dense water side, and discharge through dense water delivery port.

When reverse osmosis water purification installation shut down, the booster pump stop work of setting in the side of intaking, this moment, the thick water side at the reverse osmosis filter core leaves the partial thick water that has not discharged, partial pure water also has been retained to the pure water side simultaneously, under the effect of the osmotic pressure that causes by aquatic ion concentration difference, the salt ion of thick water side can permeate to the pure water side, after shutting down for a long time, the ion concentration that the pure water surveyed can rise to higher state, thereby lead to membrane pure water TDS (Total dissolved solids) value higher, finally lead to the TDS value of the first cup of water that flows out by the tap after the start-up again too high, be unfavorable for the human body to drink.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect or the problem that exist among the background art, provide a filter equipment and filtration system, it can reduce the TDS value of shutting down the back pure water side, solves the too high problem of the first cup of water TDS value of reverse osmosis purifier.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the first technical scheme is as follows: a filtering device comprises a shell, a filter element, a raw water passing path, a pure water passing path and a concentrated water passing path, wherein the raw water passing path comprises a raw water inlet arranged on the shell, the pure water passing path comprises a central pipe arranged in the filter element and a pure water outlet arranged on the shell, the concentrated water passing path comprises a concentrated water outlet arranged on the shell, the bottom end of the filter element is communicated with the raw water passing path for raw water to enter, and the top end of the filter element is communicated with the concentrated water passing path for concentrated water to discharge; in addition, the water storage component is also included; the water storage part is communicated with the raw water passing channel, stores raw water when the filtering device runs, and pushes the stored raw water to enter the filter element through the bottom end of the filter element to be washed when the filtering device stops.

The second technical scheme based on the first technical scheme is as follows: the water storage part is a raw water cavity formed by the space between the shell and the filter element, is communicated with the bottom end of the filter element and is isolated from the top end of the filter element, and the air inside the water storage part applies pressure to raw water entering the raw water cavity.

A third technical solution based on the first technical solution: the water storage component comprises a first air bag water tank which is positioned outside the shell and communicated with the raw water inlet, and the first air bag water tank is provided with an air cavity and an elastic film for sealing the air cavity; raw water enters the first air bag water tank when the filtering device operates and extrudes air in the air cavity through the elastic film to store energy, and compressed air expands when the filtering device stops and extrudes stored raw water through the elastic film to enable the raw water to reach the bottom end of the filter element through the raw water passing water path.

A fourth technical solution based on the third technical solution: the water storage part also comprises a water storage cavity, the water storage cavity is formed by the space between the shell and the filter element, and the water storage cavity is communicated with the bottom end of the filter element and is isolated from the top end of the filter element.

A fifth technical means based on any one of the second to fourth technical means: the top end of the water inlet pipe is communicated with the raw water inlet, and the bottom end of the water inlet pipe is communicated with the raw water cavity; the water inlet pipe is sleeved in the central pipe, and pure water generated after being filtered by the filter element flows to the pure water outlet after entering a gap between the central pipe and the water inlet pipe.

A sixth technical solution based on the fifth technical solution: a first limiting bulge is arranged at a position, close to the bottom end, of the inner wall of the central pipe, and a second limiting bulge matched with the first limiting bulge is arranged at a corresponding position on the outer wall of the water inlet pipe; the second limiting bulge is used for abutting against the first limiting bulge to fix the water inlet pipe; the first limiting bulge extends towards the bottom end of the central tube to form a sealing wall, and the outer wall of the water inlet tube is in sealing fit with the sealing wall when the water inlet tube is fixed on the central tube.

A seventh technical solution based on the fifth technical solution: the top end of the inner side of the shell is provided with a first protruding annular part, and the top end of the water inlet pipe is hermetically matched with the inward side wall of the first annular part and is communicated with the raw water inlet; the top end of the inner side of the shell is provided with a second annular part which is concentric with the first annular part and protrudes out of the first annular part, and the top end of the central tube is hermetically matched with the inward side wall of the second annular part and matched with the outward side wall of the first annular part to form a water path communicated with the pure water outlet.

An eighth technical means based on the seventh technical means: the top end of the inner side of the shell is provided with a third annular part which is concentric with the second annular part and is positioned outside the second annular part, and the sealing element is in sealing fit with the inward side wall of the third annular part and is matched with the outward side wall of the second annular part to form a water path communicated with the concentrated water outlet.

A ninth technical solution based on the eighth technical solution: also includes a seal; the sealing element comprises an annular cladding plate, and two side edges of the cladding plate respectively extend along vertical directions which are deviated from each other to form a first connecting part and a second connecting part; the first connecting portion along circumference with the filter core rigid coupling, the second connecting portion with the third annular portion lateral wall sealing fit inwards and with the second annular portion lateral wall cooperation outwards form with the water route of dense water delivery port intercommunication.

A tenth technical solution based on the fifth technical solution: the bottom end of the inner side of the shell is provided with a support bar which supports the filter element so as to enable the water inlet pipe to be communicated with the original water cavity.

The utility model provides an eleventh technical scheme, it includes as first to tenth any technical scheme a filter equipment: in addition, the method further comprises the following steps:

the raw water inlet pipeline is communicated with the raw water inlet and is provided with an electromagnetic valve and a pressure pump;

one end of the pure water outlet pipeline is communicated with the pure water outlet, and the other end of the pure water outlet pipeline is communicated with a water outlet faucet;

and the concentrated water outlet pipeline is communicated with the concentrated water outlet and is provided with a flushing valve.

As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the filter element is provided with a water storage part, raw water is stored when the filter device runs, and the raw water is discharged by using air pressure when the filter device stops, so that the raw water can still flow when the filter device stops, the inside of the filter element is washed, the TDS value of water in the filter element in a shutdown state is reduced, and the problem of overhigh TDS value of first cup of water caused by osmotic pressure after long-time shutdown is solved; in addition, the water storage component is directly communicated with the raw water passing channel, the structural complexity of the filtering device can be reduced, and a corresponding valve or a corresponding pipeline does not need to be additionally arranged, so that the manufacturing cost of the filtering device can be reduced.

2. There is the air in former water cavity, and because its and filter core bottom intercommunication, so the former water can be followed the bottom in former water cavity and got into former water cavity to the air that the extrusion originally existed, when filter equipment stopped, dense water delivery port pressure release makes the pressure imbalance in the former water cavity, and the air volume expansion of compressed, thereby will occupy among the raw water extrusion to the filter core in the space.

3. The gasbag water tank can extrude the pure water of storage automatically to in the water route is crossed to the raw water from the raw water when pressure is out of balance to when filter equipment stopped, wash the filter core.

4. The water storage cavity is arranged, under the condition that air exists in the water storage cavity, the water storage cavity can play the same role as the original water cavity, and on the basis, the water storage cavity is communicated with the air bag water tank, so that the drainage capacity can be prevented from being reduced after the air in the water storage cavity escapes; in addition, if air does not exist in the water storage cavity, the air storage cavity is communicated with the air bag water tank, so that raw water can be extruded into the filter element to be flushed by the action of the air bag water tank.

5. The water inlet pipe is arranged, so that raw water enters from the bottom of the filter element, the arrangement of pipelines in the filter device is convenient, and the service life of the filter element can be prolonged; the water inlet pipe is fixedly connected in the central pipe, so that the assembly is convenient, and the size of the filtering device can be reduced.

6. Set up first spacing arch at the center tube inner wall, the inlet tube outer wall sets up the spacing arch of second, supports the position of spacing fixed inlet tube through the top.

7. The first annular part is arranged, so that the water inlet pipe can be communicated with the water inlet when the filtering device is assembled, and the sealing property is ensured; the second annular part is arranged and used for communicating the central pipe with the pure water outlet and ensuring the sealing property when the filtering device is assembled; the third annular part is arranged for communicating the sealing element with the concentrated water outlet and ensuring the sealing property when the filtering device is assembled.

8. The first connecting part of the sealing element is fixedly connected with the filter element shell along the circumferential direction, the first connecting part and the cladding plate together surround the top end face of the filter element, and the second connecting part is in sealing fit with the third annular part to isolate the concentrated water outlet end of the filter element from the raw water cavity, so that concentrated water can only flow out from the concentrated water outlet.

9. Set up the support bar for the filter core assembles to form the space that supplies inlet tube and former water cavity intercommunication between filter core bottom and the inboard bottom of shell when among the shell.

10. The filter system is internally provided with an electromagnetic valve for controlling the on-off of a raw water inlet pipeline, the pressure pump is used for applying pressure to raw water to enable the raw water to enter the filter element for filtering, the water outlet tap is used for controlling the opening and closing of a pure water outlet pipeline and water outlet, and the flushing valve is used for adjusting the water flow of a concentrated water outlet pipeline.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment 1 of a filtering apparatus provided by the present invention;

FIG. 2 is a schematic structural view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of portion B of FIG. 1;

FIG. 4 is a schematic view of the filter cartridge, the inlet tube and the sealing member of FIG. 1;

FIG. 5 is a schematic structural view of the housing of FIG. 1;

fig. 6 is a schematic structural diagram of embodiment 2 of a filtering apparatus provided by the present invention;

fig. 7 is a schematic structural diagram of embodiment 3 of a filtering apparatus according to the present invention.

Description of the main reference numerals:

10. a housing; 11. a raw water inlet; 12. a pure water outlet; 13. a concentrated water outlet; 14. a supporting strip; 15. a first annular portion; 16. a second annular portion; 17. a third annular portion; 21. a filter material; 22. a central tube; 221. a first limit protrusion; 2211. a sealing wall; 222. a through hole; 23. a seal member; 231. a cladding sheet; 232. a first connection portion; 233. a second connecting portion; 24. a filter element housing; 30. a water inlet pipe; 31. a second limit bulge; 40. a raw water cavity; 41. an air bag water tank; 42. a water storage cavity.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are preferred embodiments of the invention and should not be considered as excluding other embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

In the claims, the specification and the drawings, unless otherwise expressly limited, the terms "first," "second," or "third," etc. are used for distinguishing between different elements and not for describing a particular sequence.

In the claims, the specification and the drawings, unless otherwise expressly limited, to the extent that directional terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise" and the like are used, the positional or orientational relationships illustrated in the drawings are based on the positional and orientational relationships illustrated in the drawings and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention in any way.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the term "fixedly connected" or "fixedly connected" is used, which is to be understood broadly, that is, any connection mode without displacement relation or relative rotation relation between the two, that is, including non-detachably fixed connection, integrated connection and fixed connection through other devices or elements.

In the claims, the specification and the drawings, the terms "including", "comprising" and variations thereof, if used, are intended to be inclusive and not limiting.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of embodiment 1 of a filtering apparatus provided by the present invention, which includes a housing 10, a filter element, a sealing member 23, and a water inlet pipe 30.

As shown in fig. 5, the cover is a bottom end portion of the housing 10, the housing is the other portion of the housing 10 except the cover, the housing is used for accommodating the filter element, the water inlet pipe 30 and the sealing member 23, and the cover is used for being fixedly connected with the housing to form the complete housing 10. The cover is fixedly connected to the lower end of the housing by welding, screwing, etc. after the filter element, the sealing member 23 and the water inlet pipe 30 are assembled into the housing. The entire housing 10 may be cylindrical or prismatic.

The upper end of the shell 10 is provided with a raw water inlet 11, a pure water outlet 12 and a concentrated water outlet 13, which are arranged in a concentric annular through groove structure, and a connecting structure for connecting and fixing is arranged in each through groove structure, of course, the shapes of the raw water inlet 11, the pure water outlet 12 and the concentrated water outlet 13 can be matched with the overall shape of the shell 10 to form a circular ring shape or a square frame shape, and also can be not matched with the overall shape of the shell 10, and only the functions of water inlet and outlet and matching with an external device are needed. As shown in fig. 1, the center is a raw water inlet 11, the raw water inlet 11 is a pure water outlet 12 outward, and the pure water outlet 12 is a concentrated water outlet 13 outward. The raw water inlet 11 is communicated with an external water inlet pipeline and receives inlet water under the action of a pressurizing device, and the inlet water can be municipal tap water.

The top end of the inner side of the housing 10 is provided with a first annular portion 15, a second annular portion 16 and a third annular portion 17, which are arranged in a concentric annular convex structure, and as shown in fig. 1, the side wall of the first annular portion 15 surrounds and forms a cylindrical groove structure, the top surface of the first annular portion is communicated with the raw water inlet 11, the side wall of the second annular portion 16 is matched with the side wall of the first annular portion 15 to form an annular groove structure, the top surface of the second annular portion is communicated with the pure water outlet 12, the side wall of the third annular portion 17 is matched with the side wall of the second annular portion 16 to form an annular groove structure, and the top surface of the third annular portion is communicated with the concentrated. Similarly, the shape of the first, second and third annular portions 15, 16, 17 may or may not match the overall shape of the housing 10. In particular, the base ends of the first annular portion 15, the second annular portion 16 and the third annular portion 17 are in a plane.

As shown in fig. 4, the filter element includes a filter material 21, a central tube 22 and a filter element shell 24, wherein the filter material 21 can be formed by winding a reverse osmosis membrane, a water-proof net, a screen mesh, etc. together with the central tube 22 as a center, and the filter element shell 24 is disposed on the outer side wall of the filter material 21, so that only the top end and the bottom end of the filter material are exposed out of the filter material. In addition, the filter material 21 may be a material that can filter metal ions in water, such as a nanofiltration membrane.

The central tube 22 is arranged in the center of the filter material 21, the wall of the central tube is provided with a plurality of through holes 222, and the pure water formed after the inlet water passes through the filter material enters the central tube 22 through the through holes 222. As shown in fig. 2, the upper end of the central tube 22 is communicated with the pure water outlet 12, in this embodiment, the upper end of the central tube 22 is inserted into an annular groove formed by the first annular portion 15 and the second annular portion 16, the outer sidewall of the upper end of the central tube 22 matches with the inward sidewall of the second annular portion 16 to form a plug-in relationship, a sealing ring is further sleeved on the outer sidewall of the upper end of the central tube 22 to form a sealing fit with the inward sidewall of the second annular portion 16, and the wall thickness of the central tube 22 is smaller than the width of the annular groove formed by the first annular portion 15 and the second annular portion 16, so that after the central tube 22 is inserted into the annular groove, a gap for allowing the water to flow through is formed between the inner sidewall of the central tube 22 and the outward sidewall of the first annular portion 15, and since the top surface of the annular groove formed by the second annular portion 16 is communicated with the pure water outlet, the central tube 22 can communicate with the pure water outlet 12.

The inlet pipe 30 is connected to the raw water inlet 11 and guides the inlet water from the raw water inlet 11 to a position below the bottom end of the filter element. Specifically, in the present embodiment, as shown in fig. 4, the water inlet pipe 30 is configured to be fixed in the central pipe 22, and a gap formed between an outer wall of the water inlet pipe 30 and an inner wall of the central pipe 22 forms a pure water outlet path communicating with the pure water outlet 12. As shown in fig. 3, a first limiting protrusion 221 is disposed on the inner wall of the central tube 22 near the lower end, the first limiting protrusion 221 is an annular protrusion structure formed by extending the inner wall surface of the central tube 22 inward, and further includes a sealing wall 2211 obtained by extending the free end downward, an annular second limiting protrusion 31 is disposed on the water inlet tube 30 near the lower end, the size of the second limiting protrusion 31 can be matched with the size of the first limiting protrusion 221, and after the lower end of the water inlet tube 30 passes through the first limiting protrusion 221, the second limiting protrusion 31 can abut against the upper edge of the first limiting protrusion 221, so as to fix the water inlet tube 30. Meanwhile, the position of the water inlet pipe 30 inserted into the sealing wall 2211 is sleeved with a sealing ring, and the size of the water inlet pipe 30 at the position is matched with the size of the sealing structure, so that a pure water outlet path forms a closed structure at the position, and the inlet water of the water inlet pipe 30 can flow to the bottom end of the filter element.

In addition, the through holes 222 may or may not be formed in the wall of the central tube 22 below the water inlet tube 30, and when the through holes 222 are formed, part of the pure water is mixed with the inlet water, thereby further reducing the TDS value of the water flow for washing the filter material 21.

As shown in fig. 2, the upper end of the water inlet pipe 30 is communicated with the raw water inlet 11, in this embodiment, the upper end of the water inlet pipe 30 is inserted into the cylindrical groove surrounded by the side wall of the first annular portion 15, the outer side wall of the upper end of the central pipe 30 matches with the inward side wall of the first annular portion 15 to form a plugging relationship, the outer side wall of the upper end of the water inlet pipe 30 is further sleeved with a sealing ring to form a sealing fit with the inward side wall of the first annular portion 15, and the water inlet pipe 30 can be communicated with the raw water inlet 11 due to the fact that the top surface of the cylindrical groove formed by the first annular portion 15 is communicated with the raw water inlet 11.

The sealing member 23 is constructed as shown in fig. 4, and includes a covering plate 231, a first connecting portion 232 and a second connecting portion 233. Specifically, the shape of the cladding plate 231 is the same as the cross section of the filter element, and may be a circular ring or a square frame structure, and a hole is formed in the middle of the cladding plate for the central tube 22 and the water inlet tube 30 to pass through. Cladding plate 231 has a side at the hole site, and the other side is formed at its outer edge, and first connecting portion 232 is formed by extending along the downward vertical direction along the side at the outer edge, and then is fixedly connected with filter element shell 24, thereby forming a cladding effect on the filter element top end face. The second connecting portion 233 is formed to extend in the upward vertical direction along the side at the hole site, and then is in sealing engagement with the third annular portion 17. Specifically, as shown in fig. 2, the second connecting portion 233 is inserted into an annular groove formed by the second annular portion 16 and the third annular portion, the outer side wall of the second connecting portion 233 matches in shape to the inwardly facing side wall of the third annular portion 17 in a mating relationship, the outer side wall of the second connecting portion 233 is further sleeved with a sealing ring to form a sealing fit with the inward side wall of the third annular portion 17, while the thickness of the second connecting portion 233 is smaller than the width of the annular groove formed by the second annular portion 16 and the third annular portion 17, after the second connection part 233 is inserted into the annular groove, a gap through which the water flows is formed between the inner sidewall of the second connection part 233 and the outward sidewall of the second annular part 16, meanwhile, the top surface of the annular groove formed by the third annular part 17 is communicated with the concentrated water outlet 13, so that the end surface of the top of the filter element can be communicated with the concentrated water outlet 13 without being mixed with inlet water.

As shown in fig. 5, a support bar 14 is disposed at the bottom end of the housing 10, and the bottom end of the filter element abuts against the support bar 14, so as to form a space between the bottom end surface of the filter element and the bottom of the housing 10, so that the water inlet pipe 30 can communicate with the bottom end surface of the filter element, and the inlet water can enter the filter material 21 through the bottom end surface of the filter element.

The filter device also comprises a water storage part, wherein the water storage part stores raw water when the filter device works, and presses the stored raw water to enable the raw water to enter the filter element when the filter device stops working. Specifically, in the present embodiment, a raw water chamber 40 is formed between the inner sidewall of the housing 10 and the filter element housing 24 of the filter element, and the raw water chamber 40 communicates with the bottom end of the filter element. The raw water chamber 40 is filled with air, and after raw water enters the raw water chamber 40 through the raw water inlet 11 and the water inlet pipe 30, the raw water extrudes the air originally existing in the raw water chamber, so that the air compresses the raw water in the raw water chamber 40, and when the water inlet is stopped, the air pressure in the raw water chamber 40 pushes the raw water to enter the filter element.

During assembly, the first connecting part 232 of the sealing element 23 is fixedly connected with the filter element shell 24 on the upper portion of the filter element, then the water inlet pipe 30 is inserted into the central pipe 22 to abut against the limiting part 221, then the filter element is integrally inserted into the shell upwards, the water inlet pipe 30, the central pipe 22 and the sealing element 23 are in splicing relation with the first annular part 15, the second annular part 16 and the third annular part 17 on the shell, and then the cover body is welded with the shell.

During the use, assemble filter equipment to the drainage system in, open into water pressure equipment back running water from inlet tube 30 inflow to be guided to among the space of filter core bottom, during part running water from the filter core bottom terminal surface gets into filtering material 21 from up at this moment and carries out the drainage, during part running water gets into the former water cavity 40 between shell 10 and the filter core shell 24, and the extrusion exists the air in former water cavity 40 originally, when pressure balance, the air is no longer extruded, stores the running water among the former water cavity 40 this moment. When shutting down, the pressure of dense water delivery port 13 department is little than the pressure of former water cavity 40 department, therefore the running water of former water cavity 40 department can be followed during filter core bottom terminal surface flows into filtering material 21 to wash filtering material 21, the TDS value of the water that makes within the filtering material 21 reduces, thereby has reduced the TDS value of the first cup of water filtration system after shutting down for a long time.

The present invention further provides an embodiment 2, which is different from the embodiment 1 in that the water storage component has a different structure, in the embodiment 2, the water storage component is an air bag water tank 41 disposed outside the housing 10 and communicated with the raw water inlet 11, specifically, as shown in fig. 6, the air bag water tank 41 includes a water tank housing, a cavity is formed inside the housing, the cavity has an opening, the opening is directly and fixedly connected with the raw water inlet 11 on the housing 10, so that the raw water can simultaneously enter the cavity inside the water tank housing when reaching the raw water inlet 11, meanwhile, an elastic membrane is disposed in the cavity, the elastic membrane divides the cavity into a closed air cavity and a water storage cavity communicated with the raw water inlet 11, the raw water enters the water storage cavity, and because the raw water end has a large pressure when the filtering device operates, the elastic membrane is forced to deform, the space of the air chamber is made small and the air in the air chamber is compressed. When filter equipment stopped, the pressure of former water end disappeared, and dense water delivery port 13 pressure release, the pressure that the air in the air chamber received reduces, consequently expands to original volume again, will deposit the bottom department that water the former water extrusion among the chamber to the filter core in this process to enter into and wash filtering material 21 among the filter core.

The utility model provides an embodiment 3 still, its difference with embodiment 2 lies in, and the water storage part still includes water storage chamber 42, and gasbag water tank 41 and water storage chamber 42 intercommunication. Specifically, as shown in fig. 7, the structure of the bladder water tank 41 is the same as that of embodiment 2, and the structure of the water storage chamber 42 is the same as that of the raw water chamber 40 in embodiment 1, but the water storage chamber 42 is vacuum. The opening of the air bag water tank 41 is communicated with the top of the water storage cavity 42, when the filtering device operates, raw water enters the water storage cavity 42 through the water inlet pipe 30 and then enters the water storage cavity of the air bag water tank 41, and the volume of the air cavity is compressed to be reduced; when the filter device stops operating, the pressure is unbalanced, and the air cavity recovers the original volume, so that the raw water in the water storage cavity and the water storage cavity 42 is extruded to enter the filter element.

The utility model also provides an embodiment 4, its difference with embodiment 3 lies in that originally there is air in the water storage chamber 42. Specifically, on the basis of embodiment 3, the water storage chamber 42 is filled with air, the air in the water storage chamber 42 is compressed when water enters, the space occupied by the air chamber of the airbag water tank 41 is also compressed, the air in the water storage chamber 42 recovers the original volume when water is discharged, the air in the air chamber also recovers the original volume, and the raw water stored in the water storage chamber 42 is extruded into the filter element. Compared with example 3, example 4 has a larger amount of raw water entering the filter element.

The utility model also provides a filtration system, it has used foretell embodiment 1, embodiment 2, embodiment 3 or embodiment 4's a filter equipment, particularly, this filtration system still includes: a raw water inlet pipeline which is communicated with the raw water inlet 11 and is provided with an electromagnetic valve and a pressure pump; one end of the pure water outlet pipeline is communicated with the pure water outlet 12, and the other end of the pure water outlet pipeline is communicated with a water outlet faucet; and the concentrated water outlet pipeline is communicated with the concentrated water outlet 13 and is provided with a flushing valve. One end of the raw water inlet pipeline is communicated with municipal tap water, the other end of the raw water inlet pipeline is communicated with a raw water inlet 11, an electromagnetic valve and a pressure pump are arranged at the middle position of the raw water inlet pipeline, the electromagnetic valve controls the connection and disconnection of the raw water inlet pipeline, and the pressure pump applies pressure to the raw water to enable the raw water to enter the filter element under larger pressure; one end of the pure water outlet pipeline is communicated with the pure water outlet 12, the other end of the pure water outlet pipeline is communicated with a water outlet tap, and the opening and closing of the pure water outlet pipeline can be controlled by controlling the water outlet tap; one end of the concentrated water outlet pipeline is communicated with the concentrated water outlet 13, the other end of the concentrated water outlet pipeline is communicated with the concentrated water tank or directly discharged to a sewer pipeline, and the flushing valve is used for controlling the on-off of the concentrated water outlet pipeline.

The utility model provides a filtering device and a filtering system, wherein, zero raw water enters the filter element from the bottom end of the filter element, and concentrated water is formed after filtering and is discharged from the top end of the filter element, so that the flow velocity of water flow in the filter element can be increased, and the service life of the filter element is prolonged; set up water storage component simultaneously, the raw water that utilizes atmospheric pressure to promote the storage gets into the filter core through the filter core bottom in order to wash to reduce the TDS value of the water among the filter core under the shut down state, and then reduce the too high problem of TDS value of the first cup of water that leads to because of osmotic pressure after the shut down of longer time.

The description of the above specification and examples is intended to illustrate the scope of the invention, but should not be construed as limiting the scope of the invention. Modifications, equivalents and other improvements which may be made to the embodiments of the invention or to some of the technical features thereof by a person of ordinary skill in the art through logical analysis, reasoning or limited experimentation in light of the above teachings of the invention or the above embodiments are intended to be included within the scope of the invention.

Claims (11)

1. A filter device comprises a shell, a filter element, a raw water passing path, a pure water passing path and a concentrated water passing path, wherein the raw water passing path comprises a raw water inlet arranged on the shell, the pure water passing path comprises a central pipe arranged in the filter element and a pure water outlet arranged on the shell, the concentrated water passing path comprises a concentrated water outlet arranged on the shell,

the bottom end of the filter element is communicated with a raw water passing channel so as to allow raw water to enter, and the top end of the filter element is communicated with a concentrated water passing channel so as to allow concentrated water to be discharged;

in addition, the water storage component is also included;

the water storage part is communicated with the raw water passing channel, stores raw water when the filtering device runs, and pushes the stored raw water to enter the filter element through the bottom end of the filter element to be washed when the filtering device stops.

2. The filter apparatus of claim 1, wherein the water storage means is a raw water chamber defined by a space between the housing and the filter element, which communicates with a bottom end of the filter element and is isolated from a top end of the filter element, and air inside the raw water chamber applies pressure to raw water introduced into the raw water chamber.

3. The filtering apparatus as claimed in claim 1, wherein said water storage means comprises a bladder water tank located outside the housing and communicating with the raw water inlet, having an air chamber and an elastic membrane for sealing the air chamber; raw water enters the air bag water tank when the filtering device operates and extrudes air in the air cavity through the elastic film to store energy, and compressed air expands when the filtering device stops and extrudes stored raw water through the elastic film to enable the stored raw water to reach the bottom end of the filter element through the raw water passing water path.

4. A filter unit as claimed in claim 3 wherein the reservoir means further comprises a reservoir chamber defined by the space between the housing and the filter element and communicating with the lower end of the filter element and being isolated from the upper end of the filter element.

5. The filtration apparatus as claimed in any one of claims 2 to 4, further comprising a water inlet pipe having a top end communicating with the raw water inlet and a bottom end communicating with the raw water chamber; the water inlet pipe is sleeved in the central pipe, and pure water generated after being filtered by the filter element flows to the pure water outlet after entering a gap between the central pipe and the water inlet pipe.

6. The filter device according to claim 5, wherein the inner wall of the central tube is provided with a first limiting protrusion near the bottom end, and the outer wall of the water inlet tube is provided with a second limiting protrusion matching with the first limiting protrusion at a corresponding position; the second limiting bulge is used for abutting against the first limiting bulge to fix the water inlet pipe; the first limiting bulge extends towards the bottom end of the central tube to form a sealing wall, and the outer wall of the water inlet tube is in sealing fit with the sealing wall when the water inlet tube is fixed on the central tube.

7. The filtration apparatus as claimed in claim 5, wherein the top end of the inside of the housing is provided with a first annular portion protruding therefrom, and the top end of the water inlet pipe is in sealing engagement with the inwardly facing side wall of the first annular portion and is communicated with the raw water inlet; the top end of the inner side of the shell is provided with a second annular part which is concentric with the first annular part and protrudes out of the first annular part, and the top end of the central tube is hermetically matched with the inward side wall of the second annular part and matched with the outward side wall of the first annular part to form a water path communicated with the pure water outlet.

8. The filter apparatus of claim 7, further comprising a seal; the top end of the inner side of the shell is provided with a third annular part which is concentric with the second annular part and is positioned outside the second annular part, and the sealing element is in sealing fit with the inward side wall of the third annular part and is matched with the outward side wall of the second annular part to form a water path communicated with the concentrated water outlet.

9. A filter unit as claimed in claim 8, wherein the sealing element comprises an annular cladding plate, the cladding plate having two respective sides extending in vertical directions away from each other to form a first and second connection; the first connecting portion along circumference with the filter core rigid coupling, the second connecting portion with the third annular portion lateral wall sealing fit inwards and with the second annular portion lateral wall cooperation outwards form with the water route of dense water delivery port intercommunication.

10. The filtration apparatus as claimed in claim 5, wherein a support strip is provided at the bottom of the inside of the housing, the support strip abutting against the filter element to connect the inlet pipe to the raw water chamber.

11. A filtration system comprising a filtration device according to any one of claims 1 to 10;

in addition, the method further comprises the following steps:

the raw water inlet pipeline is communicated with the raw water inlet and is provided with an electromagnetic valve and a pressure pump;

one end of the pure water outlet pipeline is communicated with the pure water outlet, and the other end of the pure water outlet pipeline is communicated with a water outlet faucet;

and the concentrated water outlet pipeline is communicated with the concentrated water outlet and is provided with a flushing valve.

Images