Filtering mechanism and water purifying equipment

Abstract

The utility model belongs to the technical field of water treatment, and discloses a filtering mechanism and water purification equipment. The filtering mechanism comprises a filtering bottle and a filtering assembly; a water inlet, a purified water outlet and a flushing wastewater outlet are formed in the filtering bottle; the filter element assembly is arranged in the filter bottle, the filter element assembly comprises at least two filter elements which are connected in series, the filter elements and the filter bottle are matched to form a single-stage filter flow channel, each filter element comprises a filter water inlet surface, and the single-stage filter flow channel comprises a first flow channel located on the upstream of the filter water inlet surface and a second flow channel located on the downstream of the filter water inlet surface; the adjacent single-stage filtering flow channels are communicated to form a filtering main flow channel, and the filtering main flow channel is communicated with the water inlet and the purified water outlet; a first flow channel in the at least one single-stage filtering flow channel is communicated with the flushing wastewater outlet so as to flush the corresponding filtering water inlet surface. At least two filter elements are arranged in the same filter bottle, so that the number of parts can be reduced; filtering and flushing share a flow channel, and a water path structure in the filtering mechanism can be simplified, so that the cost is reduced, and the size of the whole machine is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field especially relates to a filter mechanism and water purification equipment. BACKGROUND

[0002] In the existing water purification equipment, the scheme of multi-filter element composite filtration mostly adopts double-cylinder or multi-cylinder scheme, different cylinders are installed with different filter elements, which leads to complex structure, many parts, not only improves cost, but also is not conducive to reducing the size of the whole machine. And the filter elements of some kinds need to be flushed regularly, and the flushing structure of the double-cylinder or multi-cylinder scheme is complex, which further increases the cost and the size of the whole machine. SUMMARY

[0003] The utility model discloses a filter mechanism and water purification equipment can solve the problem that the structure of multi-filter element composite filtration is complex and is not conducive to reducing the size of the whole machine.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] A filter mechanism comprises:

[0006] A filter bottle is provided with a water inlet, a purified water outlet and a flushing waste water outlet;

[0007] A filter element assembly is arranged in the filter bottle, the filter element assembly comprises at least two filter elements arranged in series, the filter element cooperates with the filter bottle to form a single-stage filter flow channel, the filter element comprises a filter water inlet surface, the single-stage filter flow channel comprises a first flow channel located upstream of the filter water inlet surface and a second flow channel located downstream of the filter water inlet surface, adjacent single-stage filter flow channels are communicated to form a total filter flow channel, and the total filter flow channel communicates the water inlet and the purified water outlet.

[0008] The first flow channel in at least one of the single-stage filter flow channels is communicated with the flushing waste water outlet to flush the corresponding filter water inlet surface.

[0009] As an optional scheme of the above filter mechanism, at least one of all the filter elements is an ultrafiltration membrane filter element, the ultrafiltration membrane filter element comprises a hollow ultrafiltration membrane wire group, the second flow channel is formed in the interior of the hollow ultrafiltration membrane wire group, the first flow channel is formed between the hollow ultrafiltration membrane wire group and the inner wall of the filter bottle, and the outer wall of the hollow ultrafiltration membrane wire group forms the filter water inlet surface.

[0010] As an optional scheme of the above filter mechanism, the ultrafiltration membrane filter element further comprises a first end cover, the first end cover is connected with the filter bottle, the first end cover is provided with a filter outlet, and the filter outlet is communicated with the purified water outlet.

[0011] The tube nozzles of the hollow ultrafiltration membrane filament groups are communicated with the filtration outlet.

[0012] As an alternative to the above filtration mechanism, the ultrafiltration membrane filter core further comprises a center tube, one axial end of the center tube is closed, the other axial end of the center tube is communicated with the filter core adjacent thereto, and a through hole is arranged on the outer wall of the center tube;

[0013] The ultrafiltration membrane filter core comprises at least two groups of the hollow ultrafiltration membrane filament groups, and the at least two groups of the hollow ultrafiltration membrane filament groups are arranged around the center tube.

[0014] As an alternative to the above filtration mechanism, the ultrafiltration membrane filter core further comprises a membrane filament head, the membrane filament head is connected with the first end cover, and a communication cavity is formed between the membrane filament head and the first end cover, the hollow ultrafiltration membrane filament group is in a U shape, and the two end tube nozzles of the hollow ultrafiltration membrane filament group are arranged in the membrane filament head and communicated with the communication cavity.

[0015] As an alternative to the above filtration mechanism, the first end cover is arranged in a spaced manner with the inner wall of the filter bottle to form a first water passing gap, and the first water passing gap is communicated with the flushing wastewater outlet and the first flow channel.

[0016] As an alternative to the above filtration mechanism, the at least two filter cores are arranged along the axial direction of the filter bottle.

[0017] And / or, the water inlet is arranged at one axial end of the filter bottle, and the purified water outlet and the flushing wastewater outlet are arranged at the other axial end of the filter bottle.

[0018] As an alternative to the above filtration mechanism, among all the filter cores, at least one filter core comprises:

[0019] An annular filter body, an outer circumferential surface or an inner circumferential surface of the filter body forms the filtration water inlet surface, one of the first flow channel and the second flow channel is formed between the outer circumferential surface of the filter body and the inner wall of the filter bottle, and the other of the first flow channel and the second flow channel is formed inside the filter body;

[0020] A second end cover is connected with the filter body and seals one axial end of the filter body, and a second water passing gap is formed between the second end cover and the inner wall of the filter bottle.

[0021] A third end cover is connected with the other axial end of the filter body, the third end cover is sealingly matched with the filter bottle, and a communication port communicated with the inside of the filter body is arranged on the third end cover.

[0022] As an alternative to the above filtering mechanism, the filtering body comprises, from inside to outside, an inner ring filter cotton layer, an activated carbon layer and an outer ring filter cotton layer.

[0023] A water purification device comprising the above filtering mechanism.

[0024] The present application has the following beneficial effects:

[0025] In the filtering mechanism, at least two filter cartridges are arranged in the same filter bottle, a single-barrel multi-filter-cartridge composite filtering structure is realized, the number of parts can be reduced, the flow channel for filtering and flushing is shared, the waterway structure in the filtering mechanism can be simplified, the cost can be reduced, and the overall size can be reduced.

[0026] The water purification device comprises the above filtering mechanism, has a simple structure, and is beneficial to reducing the cost and size. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the filtering mechanism provided by the present application;

[0028] Figure 2 is a sectional view of the filtering mechanism provided by the present application;

[0029] Figure 3 is a waterway schematic view of the filtering mechanism provided by the present application during filtering;

[0030] Figure 4 is a waterway schematic view of the filtering mechanism provided by the present application during flushing.

[0031] In the drawings:

[0032] 10, filter bottle; 11, bottle body; 12, inlet end cover; 121, water inlet; 13, outlet end cover; 131, purified water outlet; 132, flushing waste water outlet; 20, filtering assembly; 21, first filter cartridge; 211, filtering body; 212, second end cover; 213, third end cover; 214, second sealing member; 22, second filter cartridge; 221, hollow ultrafiltration membrane filament group; 222, first end cover; 2221, spacing plate; 223, membrane filament sealing head; 224, center tube; 2241, through hole; 225, first sealing member; 31, first flow channel at the head end; 32, first flow channel at the tail end. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0034] In the description of the utility model, unless another definite provision and limitation, the term "link", "connection", "fix" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but is through the contact between other features between them.And, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.

[0036] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or position relationship is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] The embodiment provides a kind of water purification equipment, including filter mechanism, filter mechanism includes water inlet 121 and clean water outlet 131, raw water is entered into filter mechanism by water inlet 121, and the clean water obtained after filtration flows out by clean water outlet 131, for use.Wherein, water purification equipment can be water purifier, for example, pipeline type ultrafiltration water purifier, can also be direct drinking machine, tea bar machine with water purification function etc.

[0038] To improve the filtering effect, for example, Figure 1 And Figure 2As shown, the filtering mechanism comprises a filter bottle 10 and a filter assembly 20 arranged in the filter bottle 10, the filter bottle 10 is provided with a water inlet 121 and a purified water outlet 131; the filter assembly 20 comprises at least two filter cartridges arranged in series, each filter cartridge cooperates with the filter bottle 10 to form a single-stage filtering flow channel, the head and tail of adjacent single-stage filtering flow channels are communicated to form a total filtering flow channel, and the total filtering flow channel is communicated with the water inlet 121 and the purified water outlet 131. After the water enters the filter bottle 10 from the water inlet 121, the filter assembly 20 can realize at least two-stage filtering, and then flows out from the purified water outlet 131, thereby improving the health and quality of filtered drinking water.

[0039] In order to ensure the filtering effect, the filtering mechanism also comprises a flushing function, and the water entering the filter bottle 10 from the water inlet 121 can flush at least part of the filter cartridges to achieve the purpose of cleaning the filter cartridges, thereby ensuring the filtering effect.

[0040] In order to simplify the structure of the filtering mechanism, as shown, Figure 2 the filter bottle 10 is also provided with a flushing waste water outlet 132, each filter cartridge comprises a filtering water inlet surface, the single-stage filtering flow channel comprises a first flow channel located upstream of the filtering water inlet surface and a second flow channel located downstream of the filtering water inlet surface; and the first flow channel in at least one single-stage filtering flow channel is communicated with the flushing waste water outlet 132. When the purified water outlet 131 is opened and the flushing waste water outlet 132 is closed, as shown, Figure 3 the water entering the filter bottle 10 from the water inlet 121 will be filtered in turn through the single-stage filtering flow channel of each filter cartridge, and the filtered water flows out from the purified water outlet 131; when the purified water outlet 131 is closed and the flushing waste water outlet 132 is opened, as shown, Figure 4 the filtered water cannot be discharged through the purified water outlet 131, and under the action of water pressure, the water will pass through the first flow channel communicated with the flushing waste water outlet 132 and then be discharged through the flushing waste water outlet 132, and in this process, the filtering water inlet surface located in the first flow channel will be flushed, the impurities intercepted on the filtering water inlet surface during the filtering process can be loosened by flushing, and then discharged with the flushing water flow, thereby realizing the self-cleaning function of part of the filter cartridges to ensure the filtering effect.

[0041] In the filtering mechanism, at least two filter cartridges are arranged in the same filter bottle 10, a single-cylinder multi-filter-cartridge composite filtering structure is realized, the number of parts can be reduced; the filtering and flushing share the flow channel, the waterway structure in the filtering mechanism can be simplified, thereby reducing the cost and the size of the whole machine.

[0042] In some embodiments, the filter assembly 20 comprises two filter cartridges, i.e. a first filter cartridge 21 and a second filter cartridge 22, the two filter cartridges are connected in series to realize two-stage filtering, the water is first filtered by the first filter cartridge 21 once, and then filtered by the second filter cartridge 22 twice, the number of filter cartridges is controlled to control the cost and the size of the filtering mechanism while ensuring the filtering effect.

[0043] In other embodiments, the number of filter cartridges can also be three, four or more, and the specific number can be set according to actual needs.

[0044] In some embodiments, among all the filter cartridges, at least one filter cartridge is an ultrafiltration membrane filter cartridge, which includes a hollow ultrafiltration membrane filament group 221. The inside of the hollow ultrafiltration membrane filament group 221 is hollow to form a second flow channel. The first flow channel is formed between the hollow ultrafiltration membrane filament group 221 and the inner wall of the filter bottle 10. The outer wall of the hollow ultrafiltration membrane filament group 221 forms a filtering water inlet surface. When the filtering mechanism is working, the water entering the first flow channel first passes through the filtering water inlet surface formed by the outer wall of the hollow ultrafiltration membrane filament group 221 under the action of water pressure, thereby entering the second flow channel formed inside the hollow ultrafiltration membrane filament group 221 to realize filtration. The impurities at the filtration site will adhere to the outer wall of the hollow ultrafiltration membrane filament group 221 or be located in the first flow channel. The filtered water flows along the space inside the hollow ultrafiltration membrane filament group 221, thereby entering the next filter cartridge or entering the clean water outlet 131.

[0045] Since the water flow direction of the hollow ultrafiltration membrane filament group 221 is from outside to inside, the outer wall of the hollow ultrafiltration membrane filament group 221 is easy to adhere to the filtered impurities. By connecting the first flow channel with the flushing waste water outlet 132, when the clean water outlet 131 is closed and the flushing waste water outlet 132 is opened, water will flush the outer surface of the hollow ultrafiltration membrane filament group 221 to achieve the purpose of cleaning impurities and ensure the filtering effect and filtering efficiency of the hollow ultrafiltration membrane filament group 221.

[0046] In some embodiments, the ultrafiltration membrane filter cartridge is the filter cartridge located at the end of the filtering assembly 20, that is, the ultrafiltration membrane filter cartridge is the second filter cartridge 22, and the pipe opening of the hollow ultrafiltration membrane filament group 221 is directly connected with the clean water outlet 131. The surface of the hollow ultrafiltration membrane filament group 221 has a microporous structure and can filter impurities with a smaller diameter. As the filter cartridge at the end of the filtering assembly 20, it is beneficial to improve the filtering effect of the filtering mechanism.

[0047] In some embodiments, the ultrafiltration membrane filter cartridge further includes a first end cover 222 connected with the filter bottle 10. The first end cover 222 is provided with a filtering outlet. The pipe opening of the hollow ultrafiltration membrane filament group 221 is connected with the filtering outlet, and the filtering outlet is connected with the clean water outlet 131 on the filter bottle 10. By arranging the first end cover 222, the hollow ultrafiltration membrane filament group 221 can be conveniently fixed, and the stability of the ultrafiltration membrane filter cartridge is improved.

[0048] In order to improve the filtered water output and water output speed, in some embodiments, the hollow ultrafiltration membrane filament group 221 can be provided with at least two groups. The pipe openings of the hollow ultrafiltration membrane filament groups 221 in each group can be connected with the clean water outlet 131 to increase the filtering area and improve the filtered water output and water output speed.

[0049] In some embodiments, the hollow ultrafiltration membrane wire groups 221 are in a U shape, both ends of the hollow ultrafiltration membrane wire groups 221 are towards the first end cover 222, and can communicate with the filtration outlet on the first end cover 222, so as to reduce the flow path of water in the hollow ultrafiltration membrane wire groups 221 and accelerate the flow rate of filtered water.

[0050] In some embodiments, the ultrafiltration membrane filter core further comprises a membrane wire head 223 connected with the first end cover 222, and a communication cavity is formed between the two. Both ends of the hollow ultrafiltration membrane wire groups 221 are arranged in the membrane wire head 223 and communicate with the communication cavity. By connecting the plurality of hollow ultrafiltration membrane wire groups 221 and the filtration outlet through the communication cavity, the structure can be simplified, the flow rate of water in each group of hollow ultrafiltration membrane wire groups 221 can be uniformed, and the stability of the filtered water can be improved.

[0051] In order to ensure the formation of the communication cavity, in some embodiments, the first end cover 222 comprises a first cover plate, a first annular side plate, and a spacing plate 2221. The first annular side plate is arranged around the circumference of the first cover plate and is connected with the first cover plate. The first cover plate and the first annular side plate form a groove, and the membrane wire head 223 is arranged in the groove. The side of the first cover plate facing the membrane wire head 223 is connected with the spacing plate 2221, and the spacing plate 2221 abuts against the membrane wire head 223 to ensure that the membrane wire head 223 is spaced apart from the first cover plate, so that the first cover plate, the first annular side plate, and the membrane wire head 223 form the communication cavity.

[0052] In order to ensure the sealing of the communication cavity, in some embodiments, a first sealing member 225 is arranged between the membrane wire head 223 and the first end cover 222. The first sealing member 225 is sleeved on the membrane wire head 223 and seals the gap between the first end cover 222 and the membrane wire head 223 in the circumferential direction, so as to prevent unfiltered water from entering the communication cavity through the gap between the first end cover 222 and the membrane wire head 223.

[0053] In some embodiments, the ultrafiltration membrane filter core further comprises a central pipe 224, one axial end of the central pipe 224 is closed, the other axial end of the central pipe 224 communicates with the filter core adjacent thereto, a through hole 2241 is arranged on the outer wall of the central pipe 224, and at least two groups of hollow ultrafiltration membrane wire groups 221 are arranged around the central pipe 224. By arranging the central pipe 224, the water filtered by the upstream filter core can flow directionally, so as to be better filtered by the hollow ultrafiltration membrane wire groups 221 and improve the filtering effect. By arranging at least two groups of hollow ultrafiltration membrane wire groups 221 around the central pipe 224, the water in the central pipe 224 can flow uniformly to the at least two groups of hollow ultrafiltration membrane wire groups 221, which is conducive to improving the filtering effect.

[0054] For example, one end of the central pipe 224 is connected with the membrane wire head 223, so as to improve the stability of the central pipe 224.

[0055] In some embodiments, the first end cover 222 is spaced apart from the inner wall of the filter bottle 10 to form a first water passing gap for the first flow channel of the ultrafiltration membrane filter element to communicate with the filter element adjacent thereto, the clean water outlet 131 or the water inlet 121.

[0056] In some embodiments, among all the filter elements, at least one filter element comprises an activated carbon filter element, which comprises an annular filter body 211, a second end cover 212 and a third end cover 213. The outer circumferential surface or the inner circumferential surface of the filter body 211 forms a filter water inlet surface, the outer circumferential surface of the filter body 211 forms one of the first flow channel and the second flow channel between the filter body 211 and the inner wall of the filter bottle 10, and the other of the first flow channel and the second flow channel is formed inside the filter body 211. The second end cover 212 is connected with the filter body 211 and seals one axial end of the filter body 211, and the second water passing gap is formed between the second end cover 212 and the inner wall of the filter bottle 10 to facilitate the water passing through the second water passing gap. The third end cover 213 is connected with the other axial end of the filter body 211, and the third end cover 213 is sealingly matched with the filter bottle 10 to block the water flow on both sides of the third end cover 213 along the axial direction of the filter bottle 10. The third end cover 213 is provided with a communication port communicating with the inside of the filter body 211.

[0057] In some embodiments, the outer circumferential surface of the filter body 211 forms the filter water inlet surface, the outer circumferential surface of the filter body 211 forms the first flow channel between the filter body 211 and the inner wall of the filter bottle 10, and the second flow channel is formed inside the filter body 211. The second water passing gap communicates the first flow channel and the filter element upstream thereof or the water inlet 121, and the communication port communicates the second flow channel and the filter element adjacent thereto or the clean water outlet 131.

[0058] In other embodiments, the inner circumferential surface of the filter body 211 forms the filter water inlet surface, the outer circumferential surface of the filter body 211 forms the second flow channel between the filter body 211 and the inner wall of the filter bottle 10, and the first flow channel is formed inside the filter body 211. The second water passing gap communicates the second flow channel and the filter element downstream thereof or the clean water outlet 131, and the communication port communicates the first flow channel and the filter element adjacent thereto or the water inlet 121.

[0059] In some embodiments, the filter body 211 comprises an inner ring filter cotton layer, an activated carbon layer and an outer ring filter cotton layer arranged in sequence from inside to outside. Through the inner ring filter cotton layer, the activated carbon layer and the outer ring filter cotton layer, the filtering effect of the filter body 211 on water can be improved, and the inner ring filter cotton layer and the outer ring filter cotton layer can fix the activated carbon on the basis of filtering, so as to avoid the activated carbon particles flowing with the filtered water, which is conducive to ensuring the reliability of the filtering mechanism.

[0060] In some embodiments, a second sealing member 214 is arranged between the third end cover 213 and the filter bottle 10, and the second sealing member 214 is sleeved outside the third end cover 213 and deforms under pressure to seal the gap between the third end cover 213 and the filter bottle 10 in the circumferential direction to achieve the sealing effect.

[0061] Optionally, the first sealing member 225 and the second sealing member 214 can each be a sealing ring.

[0062] In some embodiments, the filter assembly 20 includes two filter cartridges, namely a first filter cartridge 21 and a second filter cartridge 22, and water is filtered once by the first filter cartridge 21 and filtered twice by the second filter cartridge 22. The first filter cartridge 21 is an activated carbon filter cartridge, and the second filter cartridge 22 is an ultrafiltration membrane filter cartridge. For convenience of introduction, the outer circumferential surface of the filtering main body 211 in the first filter cartridge 21 is a filtering water inlet surface, and a first flow channel formed between the outer circumferential surface of the filtering main body 211 and the inner wall of the filter bottle 10 is referred to as a first end first flow channel 31 in the following description, and the first end first flow channel 31 is communicated with the water inlet 121 through a second water passing gap; the inside of the filtering main body 211 forms a second flow channel, which is referred to as a first end second flow channel in the following description, and the first end second flow channel is communicated with the second filter cartridge 22 through a communication port.

[0063] For convenience of introduction, the first flow channel corresponding to the ultrafiltration membrane filter cartridge is referred to as a last end first flow channel 32, and the second flow channel formed in the hollow ultrafiltration membrane wire group 221 is referred to as a last end second flow channel. The last end first flow channel 32 is communicated with the flushing waste water outlet 132 through a first water passing gap, and the last end second flow channel is communicated with the clean water outlet 131.

[0064] By arranging the first water passing gap, the communication state of the last end first flow channel 32 and the flushing waste water outlet 132 can be ensured, and water in the last end first flow channel 32 can be prevented from directly flowing to the flushing waste water outlet 132, which is beneficial to increasing the flushing effect of the water in the last end first flow channel 32 on the surface of the ultrafiltration membrane filter cartridge, thereby improving the self-cleaning effect on the filter cartridge.

[0065] In some embodiments, the at least two filter cartridges are arranged in the axial direction of the filter bottle 10 to reasonably utilize the space in the filter bottle 10.

[0066] In some embodiments, the water inlet 121 is arranged at one end in the axial direction of the filter bottle 10, and the clean water outlet 131 and the flushing waste water outlet 132 are arranged at the other end in the axial direction of the filter bottle 10 to cooperate with the arrangement mode of the at least two filter cartridges and simplify the water path structure in the filter bottle 10.

[0067] In some embodiments, the filter bottle 10 comprises a bottle body 11, an inlet end cover 12 and an outlet end cover 13, both axial ends of the bottle body 11 are open, one end is connected with the inlet end cover 12, the inlet end cover 12 is provided with a water inlet 121, the other end is connected with the outlet end cover 13, the outlet end cover 13 is provided with a water outlet and a flushing waste water outlet 132.

[0068] In other embodiments, each filter core can be the ultrafiltration membrane filter core or the activated carbon filter core introduced above.

[0069] In other embodiments, the first flow channel formed by the filter core at the end communicates with the flushing waste water outlet 132, or the first flow channel formed by each filter core communicates with the flushing waste water outlet 132, or the first flow channel corresponding to any filter core other than the end communicates with the flushing waste water outlet 132.

[0070] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A filtering mechanism, characterized by, The filter bottle (10) is provided with a water inlet (121), a purified water outlet (131) and a flushing waste water outlet (132); The filter core assembly is arranged in the filter bottle (10) and comprises at least two filter cores arranged in series. The filter core is matched with the filter bottle to form a single-stage filtering flow channel. The filter core comprises a filtering water inlet surface. The single-stage filtering flow channel comprises a first flow channel upstream of the filtering water inlet surface and a second flow channel downstream of the filtering water inlet surface. Adjacent single-stage filtering flow channels are communicated to form a total filtering flow channel. The total filtering flow channel is communicated with the water inlet (121) and the purified water outlet (131). The first flow channel in at least one of the single-stage filtering flow channels is communicated with the flushing waste water outlet (132) to flush the corresponding filtering water inlet surface. At least one of all the filter cores is an ultrafiltration membrane filter core. The ultrafiltration membrane filter core comprises a hollow ultrafiltration membrane wire group (221). The second flow channel is formed inside the hollow ultrafiltration membrane wire group (221). The first flow channel is formed between the hollow ultrafiltration membrane wire group (221) and the inner wall of the filter bottle (10). The outer wall of the hollow ultrafiltration membrane wire group (221) forms the filtering water inlet surface.

2. The filtering mechanism of claim 1, wherein, The ultrafiltration membrane filter core further comprises a first end cover (222) connected with the filter bottle (10). The first end cover (222) is provided with a filtering outlet communicated with the purified water outlet (131).

3. The filtering mechanism of claim 2, wherein, The tube opening of the hollow ultrafiltration membrane wire group (221) is communicated with the filtering outlet. The ultrafiltration membrane filter core further comprises a center tube (224). One axial end of the center tube (224) is closed. The other axial end of the center tube (224) is communicated with the adjacent filter core. The outer wall of the center tube (224) is provided with a through hole (2241).

4. The filtering mechanism of claim 3, wherein, The ultrafiltration membrane filter core comprises at least two groups of hollow ultrafiltration membrane wire groups (221). The at least two groups of hollow ultrafiltration membrane wire groups (221) are arranged around the center tube (224). The ultrafiltration membrane filter core further comprises a membrane wire sealing head (223) connected with the first end cover (222). The hollow ultrafiltration membrane wire group (221) is in a U shape. The tube openings at both ends of the hollow ultrafiltration membrane wire group (221) are arranged in the membrane wire sealing head (223) and communicated with the communication cavity.

5. The filtering mechanism of claim 3, wherein, The first end cover (222) is arranged in a spaced manner with the inner wall of the filter bottle (10) to form a first water passing gap. The first water passing gap is communicated with the flushing waste water outlet (132) and the first flow channel.

6. The filtering mechanism of claim 3, wherein, At least two filter cores are arranged in an axial direction of the filter bottle (10).

7. The filtering mechanism according to any one of claims 1-6, characterized in that, The water inlet (121) is arranged at one axial end of the filter bottle (10). The purified water outlet (131) and the flushing waste water outlet (132) are arranged at the other axial end of the filter bottle (10). At least one of all the filter cores comprises 8. The filtering mechanism according to any one of claims 1-6, characterized in that, ​ The annular filter body (211) has an outer circumferential surface or an inner circumferential surface forming the filter water inlet surface, and an outer circumferential surface of the filter body (211) and an inner wall of the filter bottle (10) form one of the first flow channel and the second flow channel, and the filter body (211) has the other of the first flow channel and the second flow channel formed inside the filter body (211); The second end cover (212) is connected with the filter body (211) and seals an axial end of the filter body (211), and a second water gap is formed between the second end cover (212) and the inner wall of the filter bottle (10); The third end cover (213) is connected with the other axial end of the filter body (211), and the third end cover (213) is in sealing cooperation with the filter bottle (10), and the third end cover (213) is provided with a communication port in communication with the inside of the filter body (211).

9. The filtering mechanism of claim 8, wherein, The filter body (211) comprises, from inside to outside, an inner ring filter cotton layer, an activated carbon layer, and an outer ring filter cotton layer.

10. A water purification apparatus characterized by comprising: The filter mechanism comprises the filter mechanism according to any one of claims 1-9.

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