CN212091708U - Filter equipment and filtration system - Google Patents

Abstract

The utility model discloses a filter equipment and filtration system, wherein filter equipment has included shell, filter core, valve and water storage device, forms pure water cavity between shell and the filter core, and the valve is installed between pure water cavity and center tube to switch on when the water pressure of center tube side is greater than the water pressure of pure water cavity side, water storage device and pure water delivery port intercommunication are in order to receive the pure water, and send the pure water of storage to pure water cavity when the valve switches on. Adopt the filter equipment and the filtration system of above-mentioned structure, carry out the recoil to the filter core through water storage device, can effectively reduce the TDS value of the first cup of water after filter equipment or the long-time stop work of filtration system, and because water storage device directly flows back to the pure water chamber through the pure water delivery port, need not externally to add pipeline and relevant ooff valve, overall structure is simple, and manufacturing cost is lower.

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: a water inlet, a pure water outlet and a concentrated water outlet. 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.

In addition, generally set up the water tank in the pure water side among the prior art to insert raw water inlet pipe with the water tank, when water purification device stopped, start the pressure pump and deliver to the water inlet side of filter core once more through raw water inlet pipe with the pure water of storing in the water tank, utilize the pure water to wash inside the filter core. This kind of structure need add a plurality of pipelines and valve, has increased purifier's structural complexity.

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:

a filtering device comprises a shell and a filter element fixedly connected in the shell, wherein the top end of the shell is provided with a raw water inlet, a pure water outlet and a concentrated water outlet, the filter element comprises a central tube communicated with the pure water outlet, one end of the filter element is communicated with the raw water inlet to allow raw water to enter, and the other end of the filter element is communicated with the concentrated water outlet to allow concentrated water to be discharged; a pure water cavity communicated with the raw water inlet or the concentrated water outlet is formed in the space between the shell and the filter element; the pure water cavity is isolated from the top end of the filter element; in addition, the water purifier also comprises a valve which is arranged between the pure water cavity and the central pipe and is conducted when the water pressure at the side of the central pipe is greater than the water pressure at the side of the pure water cavity; and the water storage device is communicated with the pure water outlet to receive the pure water and send the stored pure water to the pure water cavity when the valve is switched on.

Further, the water storage device is an air bag water tank which is provided with an air cavity and an elastic film for sealing the air cavity; when the filtering device operates, pure water enters the air bag water tank 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 the stored pure water through the elastic film to enable the pure water to enter the filter element.

Further, the water storage device comprises a water tank and a first pressure pump, the water tank is used for receiving the pure water flowing out of the pure water outlet, and the first pressure pump is used for pumping the pure water in the water tank to the pure water cavity.

Further, the device also comprises a water inlet pipe; 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 pure water cavity; the water inlet pipe is sleeved in the central pipe, and pure water generated by the filter element flows to the pure water outlet after entering a gap between the central pipe and the water inlet pipe.

Furthermore, 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.

Furthermore, a first protruding annular part is arranged at the top end of the inner side of the shell, and the top end of the central tube is in sealing fit with the inward side wall of the first annular part and is communicated with the pure water outlet; the first sealing element is fixedly connected to the top of the filter element to isolate the top end of the filter element from 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 first sealing element is in sealing fit with the inward side wall of the second annular part and is matched with the outward side wall of the first annular part to form a water path communicated with the concentrated water outlet.

Furthermore, a third protruding annular part is arranged at the top end of the inner side of the shell, and the top end of the water inlet pipe is in sealing fit 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 protruding fourth annular part which is concentric with the third annular part and is positioned outside the third annular part, and the top end of the central tube is in sealing fit with the inward side wall of the fourth annular part and is matched with the outward side wall of the third annular part to form a water path communicated with the pure water outlet.

The filter element is fixedly connected with the top of the filter element so as to isolate the top end of the filter element from the raw water inlet; the top end of the inner side of the shell is provided with a fifth annular part which is concentric with the fourth annular part and is positioned outside the fourth annular part, and the second sealing element is in sealing fit with the inward side wall of the fifth annular part and is matched with the outward side wall of the fourth annular part to form a water path communicated with the concentrated water outlet.

Furthermore, a supporting strip is arranged at the bottom end of the inner side of the shell; the support bar pushes against the filter element to form a space for raw water to enter the filter element from the bottom end of the filter element.

The utility model also provides a filtering system, which comprises the filtering device as described in any one of the above items;

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 second 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.

From the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. set up water storage device and valve, during the pure water that utilizes water storage device to send the pure water of storing into the pure water chamber through center tube and valve, dilute the ion concentration of raw water or dense water in the pure water chamber to reduce the TDS concentration of the first cup of water after the long-time stop work of filter equipment, it need not to add external pipeline and relevant ooff valve, simple structure, and the cost of manufacture is lower.

2. The air in the air bag water tank compressed air chamber when the water storage is in order to carry out the energy storage to when filter equipment stop operation produced pressure variation and leads to the valve to switch on, resume the pure water discharge to the filter core of original volumetric effort with the storage through the air.

3. The water tank and the first pressure pump can play the effect of active drainage, and pure water stored in the water tank can be pumped into the pure water cavity under the action of the first pressure pump so as to enter the filter element from the water inlet side of the filter element for flushing.

4. Set up the inlet tube for guide raw water to the filter core bottom, make the raw water from the filter core bottom get into among the filter core, improve the velocity of flow, extension filter core life.

5. Set up first spacing arch, the spacing arch of second, support through the top of the two and realize the fixed of inlet tube in the center tube.

6. Set up the sealed wall for the pure water crosses the isolated in water route and the raw water crosses the water route when realizing that the inlet tube is fixed within the center tube.

7. The first annular part and the fourth annular part are arranged and used for communicating the central pipe with the pure water outlet and ensuring the sealing performance when the filtering device is assembled.

8. The second annular part and the fifth annular part are arranged, and the first sealing element or the second sealing element can be communicated with the concentrated water outlet and the sealing performance is guaranteed when the filtering device is assembled.

9. The third annular part is arranged for communicating the water inlet pipe with the raw water outlet and ensuring the sealing performance when the filtering device is assembled.

10. Set up the support bar, support the filter core bottom at the filter core assembly among the shell after the support bar to make the filter core bottom have enough space can supply among the raw water entering filter core.

11. The filtering system is internally provided with an electromagnetic valve for controlling the on-off of a raw water inlet pipeline, the second 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 on-off and water outlet of a pure water outlet pipeline, 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 filter flask part of a filtering device 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 structural diagram of an embodiment 2 of a filter flask part of a filter device provided by the present invention;

FIG. 5 is a schematic structural view of portion D of FIG. 4;

fig. 6 is a schematic structural diagram of a filtering system 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; 112. a first annular portion; 122. a second annular portion; 111. a third annular portion; 121. a fourth annular portion; 131. a fifth annular portion; 21. A filter material; 22. a central tube; 221. a through hole; 222. a first limit protrusion; 223. a sealing wall; 30. a water inlet pipe; 31. a valve; 32. a second limit bulge; 41. a second seal member; 411. a first clad sheet; 412. a first connection portion; 413. a second connecting portion; 42. a first seal member; 421. a second sheathing panel; 422. a third connecting portion; 423. a fourth connecting portion; 50. a pure water chamber; 71. a second pressure pump; 72. a pure water outlet pipe; 73. a water storage device; 74. and (5) a filter flask.

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. 6, fig. 6 shows a schematic structural diagram of an embodiment of a filtering system provided by the present invention, wherein the present invention includes an embodiment of a filtering apparatus, a raw water inlet pipeline, a pure water outlet pipeline, a concentrated water outlet pipeline, and a solenoid valve, a second pressure pump 71, a water tap, and a flushing valve, wherein the pure water outlet pipeline includes a pure water outlet pipe 72, the filtering apparatus includes a filter flask 74 and a water storage device 73, the filter flask 74 can adopt the contents of embodiment 1 or embodiment 2 described below, and the water storage device can adopt the contents of embodiment 1, embodiment 2, or embodiment 3 described below.

One end of a 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 second pressure pump 71 are arranged at the middle position of the raw water inlet pipeline, the electromagnetic valve controls the on-off of the raw water inlet pipeline, and the second pressure pump 71 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 adjusting the water flow of the concentrated water outlet pipeline.

Specifically, the contents of the filter flask 74 and the water storage device 73 will be described below.

In embodiment 1, the specific structure of the filter flask 74 is shown in fig. 1, and it includes a housing 10, a filter element, a second sealing member 41, a water inlet pipe 30 and a valve 31, wherein a pure water chamber 50 for storing raw water is formed between the housing 10 and the filter element.

The housing 10 includes a casing and a cover, the cover is a bottom end portion of the housing 10, the casing is the other portion of the housing 10 except the cover, the casing is used for accommodating the filter element, the second sealing member 41, the water inlet pipe 30 and the valve 31, and the cover is used for being fixedly connected with the casing to form the complete housing 10. The cover body is fixedly connected to the lower end of the housing by welding, screwing, or the like after the filter element, the second sealing member 41, the inlet pipe 30, and the valve 31 are assembled into the housing. Further, the overall shape of the housing 10 may be cylindrical or prismatic or other long cylindrical shape.

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 concentric annular through groove structures, and each through groove structure is provided with a connecting structure for connecting and fixing an external pipeline. The shape of the annular through groove structure formed by 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 can also be not matched with the circular ring shape or the square frame shape, and only the functions of water inlet and outlet and matching and communicating with an external pipeline are provided. 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 raw water under the action of a second pressure pump 71, and the raw water can be municipal tap water.

As shown in fig. 2, a third annular portion 111, a fourth annular portion 121 and a fifth annular portion 131 are disposed at the top of the inner side of the housing 10, and are arranged as concentric annular protrusion structures. Specifically, the side wall of the third annular portion 111 surrounds to form a cylindrical groove structure, the top surface of the cylindrical groove structure is communicated with the raw water inlet 11, the side wall of the fourth annular portion 121 is matched with the side wall of the third annular portion 111 to form an annular groove structure, the top surface of the annular groove structure is communicated with the pure water outlet 12, the side wall of the fifth annular portion 131 is matched with the side wall of the fourth annular portion 121 to form an annular groove structure, and the top surface of the annular groove structure is communicated with the concentrated water outlet 13. Likewise, the shapes of the third, fourth and fifth annular portions 111, 121 and 131 may or may not match the overall shape of the housing 10. In particular, the planes of the bottom ends of the third annular portion 111, the fourth annular portion 121 and the fifth annular portion 131 are consistent.

The filter element material comprises a filter material 21, a central tube 22 and a filter element shell 23, wherein the filter material 21 can be matched with a reverse osmosis membrane, a water-proof net, a screen mesh and the like, the central tube 22 is used as a circle center to be wound together, and the filter element shell 24 is arranged on the outer side wall of the filter material 21, so that only the top end and the bottom end of the filter element shell can be used for supplying water or feeding water. The filter material 21 may be a material capable of filtering metal ions in water, such as a nanofiltration membrane.

The central tube 22 is arranged in the center of the filter material 21, the tube wall of the central tube is provided with a plurality of through holes 221, and pure water formed after raw water passes through the filter material enters the central tube 22 through the through holes 221. 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 third annular portion 111 and the fourth annular portion 121 in a matching manner, the outer sidewall of the upper end of the central tube 22 is in a shape-matching insertion relationship with the inward sidewall of the fourth annular portion 121, a sealing ring is further sleeved on the outer sidewall of the upper end of the central tube 22 to form a sealing engagement with the inward sidewall of the fourth annular portion 121, and the wall thickness of the central tube 22 is smaller than the width of the annular groove formed by the third annular portion 111 and the fourth annular portion 121 in a matching manner, so that after the central tube 22 is inserted into the annular groove, a gap for flowing through the pure water is formed between the inner sidewall of the central tube 22 and the outward sidewall of the third annular portion 111, and because the top surface of the annular groove formed by the fourth annular portion 121 is communicated with the, the central tube 22 can communicate with the pure water outlet 12.

The valve 31 is a pressure valve that can be opened and closed by pressure change on both sides, for example, a valve of a piston structure, and is installed at the bottom end of the central tube 22, and when the water pressure in the central tube 22 is high, the piston moves downward to open the water path, so that the pure water in the water storage device 73 enters the pure water chamber 50 through the central tube 22, and when the water pressure in the pure water chamber 50 is high, the piston moves upward to close the water path.

The top and the raw water inlet 11 intercommunication of inlet tube 30, bottom and filter core bottom intercommunication, it is specific, in this embodiment, inlet tube 30 is set up to establish among the center tube 22, and the clearance between the outer wall of inlet tube 30 and the center tube 22 forms the pure water play water route that communicates with pure water delivery port 12, and the pure water that produces by the filter core gets into and flows to water storage device 73 through pure water delivery port 12 and pure water outlet pipe 72 behind this pure water play water route. As shown in fig. 3, a first limiting protrusion 222 is disposed on the inner wall of the central tube 22 near the lower end, the first limiting protrusion 222 is an annular protrusion structure formed by inward extension of the inner wall surface of the central tube 22, and further includes a structure extending upward along the vertical direction, the structure is prevented from forming the sealing wall 222 inward, a first limiting protrusion 51 is correspondingly disposed on the position of the water inlet tube 30 near the lower end, the shapes of the first limiting protrusion 222 and the second limiting protrusion 32 are matched, when the water inlet tube 30 is inserted into the central tube 22 downward, the second limiting protrusion 32 abuts against the first limiting protrusion 222 at the position near the bottom end of the central tube 22, so as to fix the water inlet tube 30. Meanwhile, a sealing ring is sleeved at a position of the water inlet pipe 30 corresponding to the sealing wall 222, and the size of the water inlet pipe 30 at the position is matched with the size of the sealing wall 222, so that the raw water is isolated from the pure water.

The bottom of inlet tube 30 flushes with the filter core bottom, and the bottom of center tube 22 is less than the filter core bottom, is equipped with the water course of crossing that communicates with inlet tube 30 on the position that is less than the filter core bottom on center tube 22, and its specific shape can be seen and the water route of vertical direction forms "T" shape structure jointly in inlet tube 30, and pure water in the center tube 22 flows through from this water course both sides.

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 third annular portion 111, the outer side wall of the upper end of the central pipe 22 matches with the inward side wall of the third annular portion 111 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 third annular portion 111, and the top surface of the cylindrical groove formed by the third annular portion 111 is communicated with the raw water inlet 11, so the water inlet pipe 30 can be communicated with the raw water inlet 11.

The filter core bottom communicates with raw water inlet 11 in order to collect the raw water, and the filter core top communicates with dense water delivery port 13 in order to discharge dense water, and in this embodiment, pure water chamber 50 communicates with raw water inlet 11, and pure water chamber 50 is isolated with the filter core top. Specifically, the clean water chamber 50 is isolated from the cartridge top by the second seal member 41.

The second sealing member 41 is fixedly connected to the top of the filter element to isolate the top of the filter element from the raw water inlet 11. Specifically, the second sealing member 41 is configured as shown in fig. 2, and includes a first covering plate 411, a first connecting portion 412 and a second connecting portion 413, the first covering plate 411 has a shape corresponding to the cross-section of the filter cartridge, and may be a circular ring or a square frame structure, and a hole is formed in the middle thereof for passing through the central tube 22 and the water inlet tube 30. The first cover plate 411 has one side at the hole site, the opposite edge of which forms the other side, the side at the outer edge of the second connecting portion 412 is formed along the downward vertical direction and then fixedly connected to the filter element housing 23, and the side at the hole site of the second connecting portion 413 is formed along the upward vertical direction and then is in sealing engagement with the fifth annular portion 131. The second connecting portion 413 is inserted into the annular groove formed by matching the fourth annular portion 121 and the fifth annular portion 131, the outer side wall of the second connecting portion 413 is matched with the inward side wall of the fifth annular portion 131 in shape to form a plug-in relation, and a sealing ring is further sleeved on the outer side wall of the second connecting portion 413 to form sealing matching with the inward side wall of the fifth annular portion 131, so that isolation of the top end of the filter element and the pure water cavity 50 is achieved. The thickness of the second connecting portion 413 is smaller than the width of the annular groove formed by the matching of the fourth annular portion 121 and the fifth annular portion 131, so that after the second connecting portion 413 is inserted into the annular groove, a gap through which water flows can be formed between the inner side wall of the second connecting portion 413 and the outward side wall of the fourth annular portion 121, and meanwhile, because the top surface of the annular groove formed by the fifth annular portion 131 is communicated with the concentrated water outlet 13, the top end surface of the filter element can be communicated with the concentrated water outlet 13 to discharge concentrated water.

The bottom end of the housing 10 is provided with a support bar 14, and the filter element is abutted with the support bar 14 after being installed in the housing, and here, the structure abutted with the support bar is the bottom end of the central tube 22, so that a certain space is formed between the bottom end of the central tube 22 and the pure water cavity 50 for the pure water to flow to the pure water cavity 50.

The water storage device 73 is a gasbag water tank in this embodiment, and includes a water tank housing, a cavity is formed inside the housing, the cavity has an opening, the opening is communicated with the pure water outlet 12 on the housing 10, so that pure water enters into the cavity when reaching the opening of the gasbag water tank 73, meanwhile, an elastic membrane is arranged in the cavity, the elastic membrane divides the cavity into a closed air cavity and a water storage cavity communicated with the pure water outlet 12, pure water enters into the water storage cavity, and because the pure water end has a larger pressure when the filtering device operates, the elastic membrane is forced to deform, so that the space of the air cavity becomes smaller, and air in the air cavity is compressed. When the filter device stops, the pressure of the pure water end is known effectively, the pressure of the concentrated water outlet 13 is relieved, the pressure of the air in the air cavity is reduced, and therefore the air is expanded to the original volume again, and the outlet of the pure water end is sealed, so that the air bag water tank 73 can extrude the pure water in the water storage cavity into the central pipe 22 in the process, and the pure water flows through the valve 31 to enter the filter element.

One end of the second pressure pump 71 is connected with municipal tap water, the municipal tap water enters the filter flask 74 through the raw water inlet 11 after being pressurized, the filter element in the filter flask 74 filters the raw water to form pure water and concentrated water, the pure water partially enters the water storage device 73 through the pure water outlet 12 and the pure water outlet pipe 72, and the concentrated water is discharged through the concentrated water outlet 13.

During assembly, the second sealing element 41 is fixedly connected with the filter element shell 23, the water inlet pipe 30 is inserted into the central pipe 22, the first limiting protrusion 222 and the second limiting protrusion 32 are matched to fix the water inlet pipe 30, the filter element is integrally inserted into the shell upwards, the water inlet pipe 30, the central pipe 22, the second sealing element 41, the third annular portion 111, the fourth annular portion 121 and the fifth annular portion 131 on the shell form a splicing relation, the cover body and the shell are welded to form the complete filter bottle 74, the raw water inlet 11 of the filter bottle 74 is communicated with the second pressure pump 71 through a pipeline, and the pure water outlet 12 of the filter bottle 74 is communicated with the water storage device 73 through the pure water outlet channel 72.

When the filter device is used, the filter device is assembled into a water filtering system, the second pressure pump 71 is started to enable tap water to flow in from the water inlet pipe 30, the tap water is guided into the space at the bottom end of the filter element and enters the filter material 21 through the bottom end of the filter element to filter water, the generated pure water enters the central pipe 22, then passes through the pure water outlet 12 and the pure water outlet water path 72, one part of the generated pure water is stored in the water storage device 73, and the other part of the generated pure water is discharged. When the pressure is balanced on both sides of the valve 31, the pure water chamber 50 is filled with raw water. When shutting down, dense water delivery port 13 department pressure release, valve 31 pressure imbalance is opened, the pure water of water storage device 73 extrusion storage, make during the pure water gets into center tube 22, during part pure water got into filtering material 21 through-hole 221 on the center tube 22 this moment, the part got into pure water chamber 50 through valve 31 in with the raw water mixture, it erodees it to get into filtering material 21 from the filter core bottom again, make the TDS value of the water within the filtering material 21 reduce, and then reduce the TDS value of first cup of water.

The present invention also provides embodiment 2, which has a specific structure as shown in fig. 4 and 5, and is different from embodiment 1 in that the filter flask 74 has a structure different from that of embodiment 1.

Specifically, the filter flask 74 in embodiment 2 includes a housing 10, a filter element, a first sealing member 42, and a valve 31, a pure water chamber 50 is formed between the housing 10 and the filter element, and the pure water chamber 50 is directly communicated with the raw water inlet 11 on the housing 10 and guides the raw water to the bottom end of the filter element.

The raw water inlet 11 is disposed at the top of the housing 10, and the top of the housing 10 is further provided with a pure water outlet 12 and a concentrated water outlet 13, which are similar to those in embodiment 1, except that the raw water inlet 11 is disposed at the outermost side for communicating with the pure water chamber 50. In addition, in another embodiment, the pure water chamber 50 may also be communicated with the concentrated water outlet 13, and the positions of the raw water inlet 11 and the concentrated water outlet 13 are exchanged, and the water inlet and outlet directions of the filter element are reversed.

As shown in fig. 4, the inside top of the housing 10 is provided with a first annular portion 112 and a second annular portion 122 which are provided as concentric annular boss structures, similar to the structures of the third annular portion 111 and the fourth annular portion 121 in embodiment 1.

The filter element consists of a filter material 21, a central tube 22 and a filter element housing 23, which is similar in construction to the filter element of example 1, except that the upper end of the central tube 22 is in a form-fitting relationship with the inner side wall of the first annular portion 112.

The valve 31 is installed at the bottom end of the central tube 22, and is a pressure valve similar to that in embodiment 1, when the pressure in the central tube 22 is higher than the pressure in the pure water chamber 50, the valve 31 is opened, and pure water enters the pure water chamber 50.

The first sealing member 42 is fixedly connected to the top of the filter element to isolate the top of the filter element from the raw water inlet 11. Specifically, the first sealing member 42 includes a second cladding plate 421, a third connecting portion 422 and a fourth connecting portion 423, the shape of which is similar to that of the first sealing member 41, the third connecting portion 422 is fixedly connected to the filter element shell 23, the difference is that the outer wall of the fourth connecting portion 423 is matched with the inward side wall of the second annular portion 122 in shape to form a plugging relation, a sealing ring is further sleeved on the outer side wall of the fourth connecting portion 423 to form a sealing matching relation with the second annular portion 122, a gap through which water flows is formed between the fourth connecting portion 423 and the outward side wall of the first annular portion 112, and the concentrated water at the top end of the filter element is discharged through being communicated with the concentrated water outlet 13.

During assembly, the first sealing element 42 is fixedly connected with the filter element shell 23, the filter element is inserted into the shell, the central tube 22, the first sealing element 42 and the first annular part 112 and the second annular part 122 on the shell form a splicing relation, then the cover body and the shell are welded to form a complete filter bottle 74, the raw water inlet 11 of the filter bottle 74 is communicated with the second pressure pump 71 through a pipeline, and the pure water outlet 12 of the filter bottle 74 is communicated with the elastic water storage ornament 73 through the pure water outlet channel 72.

When the filter device is used, the filter device is assembled into a water filtering system, the second pressure pump 71 is started to enable tap water to flow into the filter flask 74 from the raw water inlet 11, raw water enters the filter material 21 from the bottom end of the filter element for filtering, generated pure water enters the central tube 22 and then flows through the pure water outlet 12 and the pure water outlet water channel 72, one part of the stored value water storage device 73 is discharged, and the other part of the stored value water storage device 73 is discharged. When the pressure is balanced on both sides of the valve 31, the pure water chamber 50 is filled with raw water. When shutting down, dense water delivery port 13 department pressure release, valve 31 pressure imbalance is opened, the pure water of water storage device 73 extrusion storage, make during the pure water gets into center tube 22, during part pure water got into filtering material 21 through-hole 221 on the center tube 22 this moment, the part got into pure water chamber 50 through valve 31 in with the raw water mixture, it erodees it to get into filtering material 21 from the filter core bottom again, make the TDS value of the water within the filtering material 21 reduce, and then reduce the TDS value of first cup of water.

The utility model provides an embodiment 3 still, its difference with embodiment 1 and embodiment 2 lies in, the water storage device 73's that adopts the structure is different, in embodiment 3, water storage device 73 includes water tank and first force pump, water tank and pure water outlet pipe 72 intercommunication for receive and store the pure water, first force pump is exerted pressure to the pure water in the water tank when filter equipment stops operating, make the pure water enter into the pure water chamber 50 among the filter flask 74 via pure water outlet pipe 72 by the water tank, wash out among the intake side entering filter core of follow filter core again.

The utility model provides a pair of filtration system, it has adopted the filter equipment of foretell embodiment 1, embodiment 2 or embodiment 3.

The utility model provides a pair of filter equipment and filtration system, through setting up water storage device 73 and valve 31, the pure water that utilizes water storage device 73 to store sends into through center tube 22 and valve 31 among the pure water chamber 50, dilutes the ion concentration of the raw water in the pure water chamber 50 to reduce the TDS concentration of the first cup of water after the long-time stop work of filter equipment, it need not to add outside pipeline and relevant ooff valve, simple structure, and the cost of manufacture is lower.

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 (10)

1. A filter device comprises a shell and a filter element fixedly connected in the shell, wherein the top end of the shell is provided with a raw water inlet, a pure water outlet and a concentrated water outlet, the filter element comprises a central tube communicated with the pure water outlet,

one end of the filter element is communicated with a raw water inlet for raw water to enter, and the other end of the filter element is communicated with a concentrated water outlet for concentrated water to discharge;

a pure water cavity communicated with the raw water inlet or the concentrated water outlet is formed in the space between the shell and the filter element;

the pure water cavity is isolated from the top end of the filter element;

in addition, it also includes,

the valve is arranged between the pure water cavity and the central pipe and is conducted when the water pressure at the side of the central pipe is greater than the water pressure at the side of the pure water cavity;

and the water storage device is communicated with the pure water outlet to receive the pure water and send the stored pure water to the pure water cavity when the valve is switched on.

2. The filtration apparatus as claimed in claim 1, wherein the water storage means is a bladder water tank having an air chamber and an elastic membrane for sealing the air chamber; when the filtering device operates, pure water enters the air bag water tank 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 the stored pure water through the elastic film to enable the pure water to enter the filter element.

3. The filtration apparatus as claimed in claim 1, wherein said water storage means comprises a tank for receiving pure water from said pure water outlet and a first pressure pump for pumping pure water from said tank to said pure water chamber.

4. A filter device as claimed in claim 2 or 3, further comprising a water inlet pipe; 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 pure water cavity; the water inlet pipe is sleeved in the central pipe, and pure water generated by the filter element flows to the pure water outlet after entering a gap between the central pipe and the water inlet pipe.

5. The filter device according to claim 4, 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.

6. A filter unit as claimed in claim 2 or 3 wherein the housing is provided with a first annular projecting portion at the top of the inside thereof, the top end of the central tube being in sealing engagement with the inwardly facing side wall of the first annular portion and communicating with the outlet for purified water; the first sealing element is fixedly connected to the top of the filter element to isolate the top end of the filter element from 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 first sealing element is in sealing fit with the inward side wall of the second annular part and is matched with the outward side wall of the first annular part to form a water path communicated with the concentrated water outlet.

7. The filtration apparatus as claimed in claim 4, wherein the top of the inside of the housing is provided with a third annular portion protruding therefrom, and the top of the water inlet pipe is in sealing engagement with the inwardly facing side wall of the third annular portion and is communicated with the raw water inlet; the top end of the inner side of the shell is provided with a protruding fourth annular part which is concentric with the third annular part and is positioned outside the third annular part, and the top end of the central tube is in sealing fit with the inward side wall of the fourth annular part and is matched with the outward side wall of the third annular part to form a water path communicated with the pure water outlet.

8. The filtration apparatus as claimed in claim 7, further comprising a second sealing member fixedly attached to a top of the filter element for isolating a top end of the filter element from the raw water inlet; the top end of the inner side of the shell is provided with a fifth annular part which is concentric with the fourth annular part and is positioned outside the fourth annular part, and the second sealing element is in sealing fit with the inward side wall of the fifth annular part and is matched with the outward side wall of the fourth annular part to form a water path communicated with the concentrated water outlet.

9. A filter unit as claimed in claim 2 or 3, wherein the bottom of the inside of the housing is provided with support strips; the support bar pushes against the filter element to form a space for raw water to enter the filter element from the bottom end of the filter element.

10. A filtration system comprising a filtration device according to any one of claims 1 to 9;

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 second 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.

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