Filter element and water purification system

Abstract

The present invention proposes a filter element and a water purification system including the filter element. The filter element includes a filter element body, a water circuit switching valve and an automatic flushing valve. The filter element body is provided with a water inlet, a water outlet and a sewage outlet; the water circuit switching valve is provided with a first flow channel and a second flow channel. The water circuit switching valve has a filtering position and a flushing position. When the water circuit switching valve is in the filtering position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel connects the external water outlet and the water outlet of the filter element body; when the water circuit switching valve is in the flushing position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel blocks the external water outlet and / or the water outlet of the filter element body; the automatic flushing valve is connected to the sewage outlet, and the automatic flushing valve is opened and closed at a fixed time. In this way, the present invention realizes the automatic flushing of the filter element to solve the problem of impurities accumulated in the filter element when in use in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and in particular to a filter element and a water purification system. Background Art

[0002] In the prior art, in filter elements, especially filter elements with ultrafiltration filter bodies, impurities in the water accumulate in the membrane fibers of the ultrafiltration filter bodies during the water purification process, thereby affecting the water purification effect and the service life of the filter element. That is, the filter elements in the prior art have the problem of easy accumulation of impurities inside. Summary of the invention

[0003] The present invention provides a filter element and a water purification system using the filter element, aiming to solve the problem of easy accumulation of impurities inside the filter element in the prior art.

[0004] In order to solve the above problems, the present invention proposes a filter element. Specifically, the filter element includes a filter element body, a water circuit switching valve and an automatic flushing valve. The filter element body is provided with a water inlet, a water outlet and a sewage outlet; the water circuit switching valve is provided with a first flow channel and a second flow channel. The water circuit switching valve has a filtering position and a flushing position. When the water circuit switching valve is in the filtering position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel connects the external water outlet and the water outlet of the filter element body; when the water circuit switching valve is in the flushing position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel blocks the external water outlet and / or the water outlet of the filter element body; the automatic flushing valve is connected to the sewage outlet, and the automatic flushing valve is opened and closed regularly.

[0005] In one embodiment, the water path switching valve also includes a third flow channel, and the water path switching valve also has a water stop position. When the water path switching valve is in the water stop position, the first flow channel blocks the external water inlet and / or the water inlet of the filter element body, the second flow channel blocks the external water outlet and / or the water outlet of the filter element body, and the third flow channel connects the external water inlet and the external water outlet.

[0006] In one embodiment, the filter element body includes a shell and a filter body assembly, the filter body assembly is arranged inside the shell, the filter body assembly includes an upper end cover and a filter body, the water inlet and water outlet of the filter element body are arranged on the upper end cover, the shell is provided with a through hole avoiding the upper end cover, and the edge of the upper end cover is sealed and connected to the shell.

[0007] In one embodiment, the filter body assembly also includes a lower end cover, a center tube is formed inside the filter body, the upper end of the center tube is connected to the water outlet of the filter element body, the lower end cover is connected to the lower end of the filter body, and the lower end cover is provided with a sealing portion for sealing the lower end of the center tube. In addition to the sealing portion, the lower end cover is also provided with at least one through hole connected to the sewage outlet.

[0008] In one embodiment, the filter body includes a first filter body and a second filter body, and the center tube includes a first center tube arranged in the first filter body and a second center tube arranged in the second filter body, the lower end of the first center tube and the upper end of the second center tube are connected, the upper end of the first center tube is connected to the upper section cover, the lower end of the second center tube is connected to the lower end cover, and the side wall of the second center tube is provided with a through hole.

[0009] In one embodiment, the filter body assembly also includes a cylindrical connecting piece and a sleeve, the first filter body and the second filter body are connected by the cylindrical connecting piece, the upper end cover is covered on the opening of the cylindrical connecting piece, the first filter body is arranged inside the cylindrical connecting piece, and a connecting hole for connecting the first center tube and the second center tube is arranged at the bottom of the cylindrical connecting piece. In addition to the connecting hole, a through hole for water flow is arranged at the bottom of the cylindrical connecting piece, the upper and lower ends of the sleeve are respectively connected to the cylindrical connecting piece and the lower end cover, and the second filter body is arranged inside the sleeve.

[0010] In one embodiment, the upper end cover, the lower end cover, and the bottom of the tubular connecting member are all provided with connecting holes, and the remaining parts except the connecting holes are all hollow structures.

[0011] In one embodiment, the first filter body is a non-woven filter body or a sponge filter body, and the second filter body is an ultrafiltration filter body.

[0012] In one embodiment, the shell includes a shell body and a shell cover, the shell cover is covered on the opening of the shell body, the filter body assembly is arranged inside the shell body, the shell cover and the shell body are detachably connected, and the shell cover is provided with a through hole to avoid the upper end cover.

[0013] The present invention also provides a water purification system, which includes the filter element.

[0014] Specifically, the present invention proposes a filter element and a water purification system. Specifically, the filter element includes a filter element body, a water circuit switching valve and an automatic flushing valve. The filter element body is provided with a water inlet, a water outlet and a sewage outlet; the water circuit switching valve is provided with a first flow channel and a second flow channel. The water circuit switching valve has a filtering position and a flushing position. When the water circuit switching valve is in the filtering position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel connects the external water outlet and the water outlet of the filter element body; when the water circuit switching valve is in the flushing position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel blocks the external water outlet and / or the water outlet of the filter element body; the automatic flushing valve is connected to the sewage outlet, and the automatic flushing valve is opened and closed at a fixed time. In this way, the present invention realizes the automatic flushing of the filter element to solve the problem of impurities accumulated in the filter element during use in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the filter element of the present invention;

[0017] Figure 2 for Figure 1 Flow path diagram when the water path switching valve of the middle filter element is in the filtering position;

[0018] Figure 3 for Figure 1 Flow diagram when the water path switching valve of the middle filter element is in the flushing position;

[0019] Figure 4 for Figure 1 Flow path diagram when the water path switching valve of the middle filter element is in the water stop position;

[0020] Figure 5 for Figure 1 Exploded view of the middle filter element.

[0021] Description of Figure Numbers:

[0022]

[0023]

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] See also Figures 1 to 3The present invention proposes a filter element 100. The filter element 100 includes a filter element body 10, a water circuit switching valve 20 and an automatic flushing valve 30. The filter element body 10 is provided with a water inlet, a water outlet and a sewage outlet; the water circuit switching valve 20 is provided with a first flow channel and a second flow channel. The water circuit switching valve 20 has a filtering position and a flushing position. When the water circuit switching valve 20 is in the filtering position, the first flow channel connects the external water inlet and the water inlet of the filter element body 10, and the second flow channel connects the external water outlet and the water outlet of the filter element body 10; when the water circuit switching valve 20 is in the flushing position, the first flow channel connects the external water inlet and the water inlet of the filter element body 10, and the second flow channel blocks the external water outlet and / or the water outlet of the filter element body 10; the automatic flushing valve 30 is connected to the sewage outlet, and the automatic flushing valve 30 is opened and closed regularly. Specifically, when the filter element 100 is working normally, the automatic flushing valve 30 opens after a certain period of time to flush the filter element 100. At this time, the water path switching valve 20 is in the filtering position. After the water flow from the external water inlet flows into the water inlet of the filter element body 10 from the first flow channel, when the automatic flushing valve 30 is in the closed state, the water flow is filtered through the inside of the filter element body 10 by the external water pressure and then flows out from the water outlet of the filter element body 10. When the automatic flushing valve 30 is in the closed state, the water flow flowing in from the external water inlet flushes the filter element body 10, passes through the sewage outlet, and flows out from the opened automatic flushing valve 30. However, since some water may still remain in the filter element body 10, or flows out from the water outlet of the filter element body 10, the flushing effect of the automatic flushing valve 30 is not sufficient. Therefore, in order to fully flush the filter element body 10, we adjust the water circuit switching valve 20 to the flushing position. At this time, since the second flow channel is closed, when the automatic flushing valve 30 is opened, the water flowing in from the external water inlet all flows into the automatic flushing valve 30 from the sewage outlet, so that the filter element body 10 can be fully flushed. In this way, the filter element 100 has multiple working modes. The first is to use the filter element 100 normally and perform conventional flushing on the filter element body 10. At this time, the water circuit switching valve 20 is in the filtering position. The second is that when there are a lot of impurities accumulated on the filter element body 10, sufficient flushing is required. At this time, the water circuit switching valve 20 is in the flushing position.

[0029] See also Figure 4In one embodiment, the water circuit switching valve 20 further includes a third flow channel. The water circuit switching valve 20 also has a water stop position. When the water circuit switching valve 20 is in the water stop position, the first flow channel blocks the external water inlet and / or the water inlet of the filter element body 10, the second flow channel blocks the external water outlet and / or the water outlet of the filter element body 10, and the third flow channel connects the external water inlet and the external water outlet. When the water circuit switching valve 20 is in the water stop position, the water flow does not flow into the filter element body 10. With this arrangement, the filter element body 10 or the automatic flushing valve 30 can be replaced without affecting the overall water circuit, and water leakage will not occur.

[0030] See also Figures 2 to 4 In one embodiment, the filter element body 10 includes a housing 11 and a filter element assembly, the filter element assembly is arranged inside the housing 11, the filter element assembly includes an upper end cover 14 and a filter element 12, the water inlet and the water outlet of the filter element body 10 are arranged on the upper end cover 14, the housing 11 is provided with a through hole avoiding the upper end cover 14, and the edge of the upper end cover 14 is sealed and connected to the housing 11. In order to prevent leakage, we provide sealing members at each pipeline connection and at the connection between the edge of the upper end cover 14 and the inner wall of the housing 11. Optionally, the sealing member is a sealing ring 18. With such a configuration, we do not need to separately provide a water inlet and a water outlet on the housing 11, which simplifies the waterway structure and reduces the manufacturing difficulty and manufacturing cost of the filter element 100. Furthermore, the waterway switching valve 20 can be directly connected to the waterway inside the filter element body 10 through the upper end cover 14, which reduces the installation difficulty of the waterway switching valve 20 installed on the filter element body 10. Furthermore, a sealing ring 18 is also provided at the connection between the water channel switching valve 20 and the housing 11 to prevent water from leaking to the outside.

[0031] See also Figures 2 to 4 In one embodiment, the filter assembly further includes a lower end cover 15, a central tube 13 is formed inside the filter body 12, the upper end of the central tube 13 is connected to the water outlet of the filter element body 10, the lower end cover 15 is connected to the lower end of the filter body 12, and the lower end cover 15 is provided with a plugging portion for plugging the lower end of the central tube 13. In addition to the plugging portion, the lower end cover 15 is also provided with at least one through hole connected to the sewage outlet. In this way, when the waterway switching valve 20 is in the flushing mode, water flows in through the water inlet of the filter element body 10, flushes the filter body 12, flows out from the through hole of the lower end cover 15, and then flows out from the sewage outlet. Further, in order to ensure the sewage discharge effect, a gap should be provided between the lower end cover 15 and the bottom end of the shell 11, and the gap connects the through hole of the lower end cover 15 and the sewage outlet.

[0032] See also Figures 2 to 5 In one embodiment, the filter body 12 includes a first filter body 12a and a second filter body 12b, the central tube includes a first central tube 13a disposed in the first filter body 12a and a second central tube 13b disposed in the second filter body 12b, the lower end of the first central tube 13a is connected to the upper end of the second central tube 13b, the upper end of the first central tube 13a is connected to the upper section cover, the lower end of the second central tube 13b is connected to the lower end cover 15, and the side wall of the second central tube 13b is provided with a through hole. Optionally, the present invention proposes a filter element 100 with an automatic flushing function, and the filter material used in the filter element that often needs to be provided with an automatic flushing function is relatively expensive. Therefore, in the case of poor water quality, in order to ensure the life of the filter material that plays a major purification role. Specifically, the present invention proposes a filter element 100 with a composite structure, the water flow flowing in from the external water inlet is pre-treated by the first filter body 12a, and then flows into the second filter body 12b to purify the water. It is worth noting that when the waterway switching valve 20 is in the filtering position, what we ultimately need is the water flow that has been purified by the first filter body 12a and the second filter body 12b in sequence. In order to ensure that the water flow processed by the first filter body 12a does not directly flow out from the water outlet of the filter element body 10, the side wall of the first central tube 13a is not provided with a through hole, and the side wall of the second central tube 13b is provided with a through hole. After being filtered by the first filter body 12a and the second filter body 12b, the clean water flows into the second central tube 13b from the side wall of the second central tube 13b, and then passes through the first central tube 13a in sequence and flows into the external water outlet.

[0033] See also Figure 5In one embodiment, the filter assembly further includes a cylindrical connector 16 and a sleeve 17, the first filter 12a and the second filter 12b are connected through the cylindrical connector 16, the upper end cover 14 is covered at the opening of the cylindrical connector 16, the first filter 12a is arranged inside the cylindrical connector 16, the bottom of the cylindrical connector 16 is provided with a connecting hole for the first center tube 13a and the second center tube 13b to communicate, in addition to the connecting hole, the bottom of the cylindrical connector 16 is provided with a through hole for water flow to pass through, the upper and lower ends of the sleeve 17 are respectively connected to the cylindrical connector 16 and the lower end cover 15, and the second filter 12b is arranged inside the sleeve 17. Specifically, the cylindrical connector 16 and the sleeve 17 divide the inside of the housing 11 into two relatively independent filter spaces, thereby facilitating the installation of the first filter 12a and the second filter 12b. Furthermore, the sleeve 17 and the side wall of the cylindrical connector 16 also ensure that in the case of external pressure filtration, the water flow does not flow out from the side of the filter body 12, but flows downward or into the central tube. That is, the arrangement of the sleeve 17 and the cylindrical connector 16 further ensures the filtering effect.

[0034] See also Figure 5 In one embodiment, the upper end cover 14, the lower end cover 15, and the bottom of the cylindrical connecting member 16 are all provided with a communication hole, and the rest of the parts except the communication hole are hollow structures. In order to facilitate processing, the upper end cover 14 and the lower end cover 15 are similar structures that are easy to process. The setting of the hollow structure can make more water flow into the filter element body 10, thereby improving the filtering speed of the filter element 100.

[0035] In one embodiment, the first filter body 12a is a non-woven filter body or a sponge filter body, and the second filter body 12b is an ultrafiltration filter body. Among them, the first filter body 12a mainly plays the role of pre-pretreatment of water, and the second filter body 12b plays the main role of purifying water. Therefore, according to the different roles played by different filter bodies 12. We use different types of filter materials as filter bodies. Specifically, the sponge filter body or the non-woven filter body mainly plays the role of filtering large particle impurities in water. Ultrafiltration (UF) technology is a membrane separation technology between microfiltration and nanofiltration, with an average pore size of 3 to 100nm, and has the functions of purifying, separating, and concentrating solutions. Its interception mechanism mainly includes the screening effect and electrostatic effect of the membrane. The filter medium is an ultrafiltration membrane. Driven by the pressure difference on both sides, only low molecular weight solutes and water can pass through the ultrafiltration membrane, thereby achieving the purpose of purification, separation, and concentration. That is, the ultrafiltration filter body 12 plays the most important purification role in the filter element 100 of the present invention, affecting the final purification effect. The cost of ultrafiltration filter material is relatively high, and the membrane filaments of the ultrafiltration filter material accumulate impurities, thereby affecting the service life and filtering effect. When the automatic flushing valve 30 is opened, the water flow mainly flushes the membrane filaments of the ultrafiltration filter material to flush the impurities accumulated on the membrane filaments, thereby extending the service life of the filter element 100.

[0036] See also Figure 5 In one embodiment, the housing 11 includes a housing body 11b and a housing cover 11a, wherein the housing cover 11a is covered at the opening of the housing body 11b, the filter assembly is arranged inside the housing body 11b, the housing cover 11a and the housing body 11b are detachably connected, and the housing cover 11a is provided with a through hole avoiding the upper end cover 14. In this way, the filter body 12 inside the filter element 100 can be conveniently replaced. Or when other parts inside the housing 11 are damaged, it is convenient to perform maintenance.

[0037] The present invention also proposes a water purification system, which includes the filter element 100. Further, the filter element is installed in the water purification system. The water purification system also includes a pressurizing device, which is used to achieve external pressure filtration of the filter element. The water purification system also includes a wastewater receiving part connected to the sewage outlet.

[0038] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A filter element, characterized in that: include: The filter element body is provided with a water inlet, a water outlet and a sewage outlet; The filter element body comprises a shell and a filter body assembly, the filter body assembly is arranged inside the shell, the filter body assembly comprises a filter body, the filter body comprises a first filter body and a second filter body, a center tube is formed inside the filter body, the center tube comprises a first center tube arranged in the first filter body and a second center tube arranged in the second filter body, the lower end of the first center tube is connected to the upper end of the second center tube, and the side wall of the second center tube is provided with a through hole, so that water flows through the first filter body and the second filter body in sequence and then flows into the second center tube, and flows to the water outlet through the second center tube and the first center tube; A water channel switching valve is provided with a first flow channel and a second flow channel. The water channel switching valve has a filtering position and a flushing position. When the water channel switching valve is in the filtering position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel connects the external water outlet and the water outlet of the filter element body; when the water channel switching valve is in the flushing position, the first flow channel connects the external water inlet and the water inlet of the filter element body, and the second flow channel blocks the external water outlet and / or the water outlet of the filter element body; the water channel switching valve also includes a third flow channel, and the third flow channel is used to connect the external water inlet and the external water outlet; An automatic flushing valve is connected to the sewage outlet, and the automatic flushing valve is opened and closed at a fixed time.

2. The filter element according to claim 1, characterized in that: The water path switching valve also has a water stop position. When the water path switching valve is in the water stop position, the first flow channel blocks the external water inlet and / or the water inlet of the filter element body, the second flow channel blocks the external water outlet and / or the water outlet of the filter element body, and the third flow channel connects the external water inlet and the external water outlet.

3. The filter element according to claim 1, characterized in that: The filter assembly includes an upper end cover, the water inlet and the water outlet of the filter element body are arranged on the upper end cover, the shell is provided with a through hole avoiding the upper end cover, and the edge of the upper end cover is sealed and connected to the shell.

4. The filter element according to claim 3, characterized in that: The filter body assembly also includes a lower end cover, the upper end of the central tube is connected to the water outlet of the filter element body, the lower end cover is connected to the lower end of the filter body, and the lower end cover is provided with a sealing portion for sealing the lower end of the central tube. In addition to the sealing portion, the lower end cover is also provided with at least one through hole connected to the sewage outlet.

5. The filter element according to claim 4, characterized in that: The upper end of the first central tube is connected to the upper end cover, and the lower end of the second central tube is connected to the lower end cover.

6. The filter element according to claim 5, characterized in that The filter assembly also includes a cylindrical connector and a sleeve, the first filter body and the second filter body are connected via the cylindrical connector, the upper end cover is covered on the opening of the cylindrical connector, the first filter body is arranged inside the cylindrical connector, a connecting hole for connecting the first center tube and the second center tube is arranged at the bottom of the cylindrical connector, in addition to the connecting hole, a through hole for water flow is arranged at the bottom of the cylindrical connector, the upper and lower ends of the sleeve are respectively connected to the cylindrical connector and the lower end cover, and the second filter body is arranged inside the sleeve.

7. The filter element according to claim 6, characterized in that The upper end cover, the lower end cover and the bottom of the tubular connecting member are all provided with connecting holes, and the remaining parts except the connecting holes are all hollow structures.

8. The filter element according to claim 5, characterized in that The first filter body is a non-woven filter body or a sponge filter body, and the second filter body is an ultrafiltration filter body.

9. The filter element according to claim 3, characterized in that: The shell comprises a shell body and a shell cover, wherein the shell cover is covered on the opening of the shell body, the filter assembly is arranged inside the shell body, the shell cover and the shell body are detachably connected, and the shell cover is provided with a through hole avoiding the upper end cover.

10. A water purification system, characterized in that: The water purification system comprises the filter element according to any one of claims 1 to 9.

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