CN220376402U - Composite filter element of water purifying equipment - Google Patents

Abstract

The utility model discloses a composite filter element of water purifying equipment, which comprises: the top end of the filter flask is provided with a filter flask cover; the central tube is arranged in the filter flask; the first filter assembly comprises a rear filter element which is detachably arranged in the central tube; and a second filter assembly, wherein an installation space is formed between the inner wall of the filter flask and the outer wall of the central tube, and the second filter assembly is arranged in the installation space. According to the technical scheme, the integral disassembly of the first filter assembly is independent of the second filter assembly, the rear filter element can be replaced independently of the second filter assembly, the service life of the reverse osmosis filter element in the second filter assembly can be further fully utilized, and the integral use cost of the composite filter element is reduced.

Description

Composite filter element of water purifying equipment

Technical Field

The utility model relates to the field of water purifying equipment, in particular to a composite filter element of water purifying equipment.

Background

The water purifying equipment is used in producing clean water and is used in drinking, chemical, medical, cultivation, planting, food, beverage, etc.

In the existing water purifying equipment, a filter element is commonly used for filtering water, and in order to reduce the whole volume of the water purifying equipment, filter elements with different functions are integrated and combined into a whole, and the used composite filter element is generally a 3-level or 4-level filter element; the composite filter element generally comprises a front filter element for filtering large particles such as floccules, a reverse osmosis filter element for reducing the concentration of salt ions in water and filtering microorganisms, and a rear filter element for improving the taste of purified water.

The service life of the reverse osmosis filter element is often longer than that of the front filter element and the rear filter element, and when the front filter element or the rear filter element reaches the service life and needs to be replaced, the reverse osmosis filter element can be replaced along with the front filter element or the rear filter element or the three parts simultaneously due to the integrated composite integration of the filter elements, so that the service life of the reverse osmosis filter element is wasted.

Disclosure of Invention

The utility model mainly aims to provide a composite filter element of water purifying equipment, and aims to replace a rear filter element only when the service life of the rear filter element is up to the service life.

In order to achieve the above object, the present utility model provides a composite filter element of a water purifying apparatus, comprising:

a filter flask;

the central tube is arranged in the filter flask;

the first filter assembly comprises a rear filter element which is detachably arranged in the central tube;

and a second filter assembly, wherein an installation space is formed between the inner wall of the filter flask and the outer wall of the central tube, and the second filter assembly is arranged in the installation space.

Optionally/in an embodiment, the filter flask top is provided with the filter flask lid, the second water inlet has been seted up on the filter flask lid, first filter component includes the filter flask lid, the filter flask is covered and is seted up the second and go out water and cross the mouth, set up on the filter flask lid and supply the joint groove of filter flask lid embedding, set up a plurality of first water holes on the center tube, rivers are through the second water inlet gets into in the filter flask, again through the second filter component filters the back and passes through first water hole and get into in the rear-mounted filter core, then through second water outlet discharges.

Optionally/in an embodiment, the first filter assembly further includes a partition member, the post-filter element is disposed in the partition member, a plurality of second water passing holes are formed in the partition member, and the partition member is connected with the filter element cover.

Alternatively/in an embodiment, the first water passing holes are in one-to-one correspondence with the second water passing holes.

Optionally/in an embodiment, a water outlet pipe is provided on the top end of the partition, and two ends of the water outlet pipe are respectively communicated with the partition and the second water outlet through hole.

Alternatively/in an embodiment, the bottom end of the partition is an opening of the partition, and a lower end cover is disposed on the bottom end of the partition, and the lower end cover is used for limiting the post-filter element.

Optionally/in an embodiment, a limiting protrusion is formed on the lower end cover towards the inner protrusion of the partition, and the limiting protrusion and the inner wall of the partition jointly limit the rear filter element.

Optionally/in an embodiment, the filter element cover is provided with a plurality of water gaps, the water gaps include the second water outlet, the filter element cover is provided with a plurality of water channels, one of the water channels is communicated with the second water inlet, and the water gaps are communicated with the water channels in a one-to-one correspondence.

Alternatively/in an embodiment, the longitudinal cross-sectional area of the water channel is smaller than the longitudinal cross-sectional area of the water gap.

Optionally/in one embodiment, a flexible interference member is provided on the water gap, and the flexible interference member is in interference with the filter cap.

Optionally/in an embodiment, the second filter assembly includes a reverse osmosis filter element, a reverse osmosis top cover and a reverse osmosis bottom cover, the reverse osmosis filter element is disposed between the inner wall of the filter flask and the central tube, the reverse osmosis top cover is disposed on top of the reverse osmosis filter element and is in sealing connection with the filter flask cover, and the reverse osmosis bottom cover is disposed on bottom of the reverse osmosis filter element.

Alternatively/in an embodiment, the reverse osmosis top cover is provided with a through hole for the central tube to extend out.

Alternatively/in an embodiment, the reverse osmosis top cover and the reverse osmosis bottom cover are both provided with a reverse osmosis filter element groove for fixing the reverse osmosis filter element.

According to the technical scheme, the central tube is arranged in the filter flask, the second filter assembly is arranged between the filter flask and the central tube, and then the first filter assembly is detachably arranged in the central tube, so that the whole disassembly of the first filter assembly is independent of the second filter assembly, and when the front filter element and/or the rear filter element reach the service life and need to be replaced, the front filter element and/or the rear filter element can be replaced only independently of the second filter assembly, the service life of the reverse osmosis filter element in the second filter assembly can be fully utilized, and the whole use cost of the composite filter element is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a composite filter element of a water purification apparatus of the present utility model;

FIG. 2 is an exploded view of the overall structure of the composite filter element of the water purification apparatus of the present utility model;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic diagram of the overall structure of the filter cap;

FIG. 5 is an exploded view of the overall structure of the second filter assembly;

FIG. 6 is a schematic cross-sectional view of a composite filter element of the water purification apparatus of the present utility model;

FIG. 7 is an enlarged view of portion B of FIG. 6;

fig. 8 is an enlarged view of a portion C in fig. 6.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a composite filter element of water purifying equipment, which is characterized in that a central tube 340 is arranged in a filter flask 100, a second filter assembly 300 is arranged between the filter flask 100 and the central tube 340, and then a first filter assembly 200 is detachably arranged in the central tube 340, so that the whole disassembly of the first filter assembly 200 is independent of the second filter assembly 300, and further, when the service life of a rear filter element 222 is up to the service life, only the rear filter element 222 can be replaced, and the service life of a reverse osmosis filter element 310 in the second filter assembly 300 can be fully utilized, thereby reducing the whole use cost of the composite filter element.

The composite filter element provided by the utility model comprises a filter flask 100, a first filter assembly 200, a second filter assembly 300 and a central tube 340; wherein, the filter flask 100 is directly installed in the water purifying apparatus or is disposed outside the water purifying apparatus to be connected with the water purifying apparatus, the central tube 340 is disposed in the filter flask 100, so that an installation space is formed between the inner wall of the filter flask 100 and the outer wall of the central tube 340, and the second filter assembly 300 is disposed in the installation space of the filter flask 100; the second filter 300 filters solutes such as salt ions in the water, thereby reducing the concentration of the solutes such as salt ions in the water; the first filter assembly 200 is detachably installed in the central tube 340, and filters impurities contained in the water and/or improves the taste of the water.

It should be noted that, in the present embodiment, the first filter assembly 200 includes a post-filter 222, that is, the purpose of the first filter assembly 200 includes filtering the purified water filtered by the second filter assembly 300, so as to improve the drinking taste of the purified water.

Specifically, the central tube 340 is coaxially disposed in the filter flask 100, the top end of the filter flask 100 is provided with a filter flask cap 410, the second filter assembly 300 includes a reverse osmosis filter element 310, and the reverse osmosis filter element 310 is disposed in an installation space formed between the inner wall of the filter flask 100 and the outer wall of the central tube 340; in order to fix the reverse osmosis filter element 310 in the filter flask 100, the second filter assembly 300 further comprises a reverse osmosis top cover 320 and a reverse osmosis bottom cover 330, wherein the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 are respectively arranged at the top and the bottom of the reverse osmosis filter element 310, and the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 are respectively provided with a reverse osmosis filter element 310 groove for embedding the end part of the reverse osmosis filter element 310; thus, reverse osmosis top cap 320 and reverse osmosis bottom cap 330 cooperate to secure reverse osmosis cartridge 310 within filter flask 100; and bottle cap 410 is used to provide a seal for bottle 100 to ensure proper operation of reverse osmosis cartridge 310.

The first filter assembly 200 is disposed in the center tube 340; specifically, the center tube 340 is configured to provide an accommodating space for the first filter assembly 200, and the center tube 340 will block the first filter assembly 200 from directly contacting the reverse osmosis filter element 310, thereby blocking the direct impact of the water flow on the first filter assembly 200, and guaranteeing the overall service life of the first filter assembly 200. Accordingly, when water is filtered, water flows from the inner wall of the filter flask 100 to the outer wall of the center tube 340, so that water flows through the reverse osmosis filter element 310, and the concentration of solutes such as salt ions in water is reduced.

The filter bottle cap 410 is provided with a waste water outlet 415, and the waste water outlet 415 is communicated with the installation space between the filter bottle 100 and the central tube 340; the reverse osmosis filter element 310 is tightly attached to the central tube 340, so that only a part of water passes through the reverse osmosis filter element 310 under the action of pressure after entering the reverse osmosis filter element 310, and the rest part of water cannot completely pass through the reverse osmosis filter element 310, passes through the reverse osmosis top cover 320 and then is discharged out of the filter flask 100 through the wastewater outlet 415; the reverse osmosis filtration is based on that solutes such as salt ions and water molecules pass through the reverse osmosis filter membrane at different rates so as to separate the solutes in the water, so that most of impurity solutes such as salt ions can be taken away by the water which does not pass through the reverse osmosis filter element 310 and enters the wastewater outlet 415, and the integral filtration effect of the second filter assembly 300 is further ensured.

In this embodiment, the first filter assembly 200 includes a post-filter element 222 and a filter element cover 210, the post-filter element 222 is connected with the filter element cover 210, the filter element cover 410 is provided with a clamping groove 418 for embedding the filter element cover 210, and the clamping groove 418 enables the whole first filter assembly 200 to be directly inserted into the central tube 340 or directly taken out from the central tube 340. Thereby facilitating removal of the first filter assembly 200; the filter bottle cap 410 is provided with a second water inlet 413, the filter core cap 210 is provided with a second water outlet 213, the central tube 340 is provided with a plurality of first water passing holes 340a, water enters the filter bottle 100 through the second water inlet 413, is filtered by the second filter assembly 300, enters the rear filter core 222 through the first water passing holes 340a, and is discharged through the second water outlet 213.

In order to match the detachable first filter assembly 200, the reverse osmosis top cover 320 is provided with a through hole 321 for the central tube 340 to extend, so that the first filter assembly 200 can be directly taken out of the central tube 340 when the first filter assembly 200 is detached.

It should be noted that, in this embodiment, the first filter assembly 200 further includes an upper end cover 250 and a lower end cover 260, the post-filter element 222 is disposed in the central tube 340, the upper end cover 250 is connected to the top end of the post-filter element 222, and the lower end cover 260 is disposed on the bottom end of the post-filter element 222; the filter element cover 210 is connected with the upper end cover 250, and a filter element handle 270 is arranged on the filter element cover 210; thus, when the first filter assembly 200 needs to be replaced, the user can lift the filter element handle 270 to lift the filter element cover 210, and the filter element cover 210 will lift the upper end cover 250, the rear filter element 222 and the lower end cover 260, so that the first filter assembly 200 is lifted as a whole; thereby completing the replacement of the first filter assembly 200.

In other embodiments, the first filter assembly 200 may be additionally provided with a pre-filter 221 to filter the impurities such as particles and flocs contained in the water flow before the water flow passes through the second filter assembly 300; specifically, the pre-filter element 221 may be disposed between the upper end cover 250 and the post-filter element 222, the pre-filter element 221 may be disposed between the lower end cover 260 and the post-filter element 222, the pre-filter element 221 may be disposed between the upper end cover 250 and the lower end cover 260 in parallel with the post-filter element 222, or the post-filter element 222 may be replaced by the pre-filter element 221.

When the pre-filter 221 is present, the water flows through the pre-filter 221, and then enters the post-filter 222 after being filtered by the second filter assembly 300, so that the flow path may be set according to the specific arrangement of the pre-filter 221 and the post-filter 222.

It should be further noted that, in this embodiment, the first filter assembly 200 further includes a partition 280, the post-filter element 222 is disposed in the partition 280, and the partition 280 is connected to the upper end cap 250; the partition 280 is provided with a plurality of second water passing holes 280a, when water flow is filtered by the reverse osmosis filter element 310, the water flow can enter the partition 280 through the first water passing holes 340a and the second water passing holes 280a, and then the water flow can flow through the rear filter element 222 to be filtered; when the water flow is pressurized by the booster pump before flowing through the reverse osmosis filter element 310, that is, after the water flow is filtered by the pre-filter element 221, the water flow pressure is increased to pass through the reverse osmosis filter element 310, and the water flow still has higher pressure after passing through the reverse osmosis filter element 310, the central tube 340 can block a part of the water flow pressure, but the post-filter element 222 is still possibly damaged due to the too high water flow pressure, so that the impact of the water flow on the post-filter element 222 is further reduced by the partition 280, and the structural stability and the service life of the post-filter element 222 are further improved.

The partition 280 includes a partition plate 281 and a barrel 282, the bottom end of the pre-filter 221 is connected to one side of the partition plate 281, the barrel 282 is connected to the other side of the partition plate 281, the second water passing hole 280a is formed in the barrel 282, and the post-filter 222 is installed in the barrel 282.

Accordingly, the first water passing holes 340a and the second water passing holes 280a are in one-to-one correspondence, so that water can smoothly enter the separator 280 through the wall of the central tube 340 and the barrel 282 of the separator 280; when the water flows through the post-filter 222 and is filtered, the top end of the partition 280 is provided with a water outlet pipe 230, and two ends of the water outlet pipe 230 are respectively communicated with the partition 280 and the second water outlet port 213, so that the water flows through the partition 280 and can be discharged from the second water outlet port 213 through the water outlet pipe 230 after being filtered.

It should be noted that, the bottom end of the partition 280 is an opening of the partition 280, and the lower end cover 260 is disposed on the bottom end of the partition 280, so that the lower end cover 260 can limit the rear filter element 222; and during installation, the post-filter element 222 can be placed into the separator 280 first, and then the separator 280 is closed by the lower end cap 260; specifically, the lower end cover 260 protrudes toward the inside of the partition 280 to form a limiting protrusion 261, and the limiting protrusion 261 and the inner wall of the partition 280 together limit the rear filter element 222; the top of the partition 280 also protrudes into the barrel to form a limiting pipe 283, the limiting pipe 283 is communicated with the water outlet pipe 230, and the limiting pipe 283 and the inner wall of the partition 280 limit the rear filter element 222 together, so that the limiting protrusion 261, the limiting pipe 283 and the inner wall of the partition 280 limit the rear filter element 222 together, the movable range of the rear filter element 222 is reduced, the structural strength of the rear filter element 222 is improved, and the possibility that the rear filter element 222 is damaged due to water flow impact is reduced.

Based on the above description, the filter element cover 210 is further provided with a plurality of water gaps, and the plurality of water gaps include a second water outlet through hole 213; the filter bottle cap 410 is provided with a plurality of water channels, two of the water channels are respectively communicated with the second water inlet 413 and the wastewater outlet 415, and the water gaps are in one-to-one correspondence with the water channels, namely the number of the water channels is greater than or equal to the number of the water gaps; the longitudinal sectional area of the water channel is smaller than that of the water gap, so that a certain height difference is allowed to exist between the water gap and the water channel when the first filter assembly 200 is detached or installed; the water gap is also provided with a flexible abutting piece 500, and the flexible abutting piece 500 can abut against the filter bottle cap 410; specifically, since the first filter assembly 200 is detachable with respect to the filter flask 100, and the waterway between the filter flask cover 410 and the filter flask cover 210 needs to be communicated, a water gap and a waterway need to be opened, so that the integration of the composite filter element is facilitated; and there is certain movable range between filter flask lid 410 and filter core lid 210, therefore need flexible conflict piece 500 to provide sealedly between mouth of a river and the water course, and the longitudinal cross section area of water course is continuous to be less than the mouth of a river, when making filter core lid 210 activity in certain range, mouth of a river and water course still can correspond, and when filter core lid 210 imbeds in joint groove 418, flexible conflict piece 500 can produce deformation, and the deformation of flexible conflict piece 500 can cooperate the difference in height that exists between water course and the mouth of a river, and flexible conflict piece 500 also can provide sealedly between mouth of a river and the water course when deformation.

Among the water gaps, a first water inlet through hole 211, a first water outlet through hole 212 and a second water outlet through hole 213 are included, wherein the first water inlet through hole 211 and the first water outlet through hole 212 are respectively used for leading in raw water (water to be filtered) for the front filter element 221 and leading out water filtered by the front filter element 221, and the second water outlet through hole 213 is used for leading out water filtered by the rear filter element 222, namely leading out purified water; and one of the water channels is communicated with the first water inlet port 211, the first water outlet port 212, the second water outlet port 213, the second water inlet 413 and the reverse osmosis water outlet cavity respectively so as to form an integral flow path.

It should be noted that, in the present embodiment, the first filter assembly 200 may include the pre-filter 221, or may not include the pre-filter 221; when the filter comprises the pre-filter element 221, the pre-filter element 221 is arranged in a hollow mode, the water outlet pipe 230 passes through the pre-filter element 221 and is connected with the second water outlet port 213, a sealing groove 284 is formed in the peripheral wall of the top end of the partition piece 280, and a plurality of sealing rings 285 are arranged in the sealing groove 284 to isolate waterway communication between the pre-filter element 221 and the post-filter element 222; when the pre-filter 221 is not included, the pre-filter 221 may be directly removed, i.e., the installation position of the pre-filter 221 may be included in the present embodiment.

Based on the above description, if the pre-cartridge 221 is installed, the bottom end of the pre-cartridge 221 is disposed on the top end of the partition 280, and the top end of the pre-cartridge 221 is connected with the upper end cap 250; specifically, a limiting ring 281a for limiting the pre-filter element 221 is disposed on the top end of the partition 280, a mounting groove for mounting the pre-filter element 221 is formed on the upper end cover 250, the pre-filter element 221 is limited by cooperation of the limiting ring 281a and the mounting groove, the pre-filter element 221 is hollow, and the water outlet pipe 230 passes through the pre-filter element 221; if the pre-filter element 221 is not provided, the pre-filter element 221 can be directly removed, and the lengths of the partition piece 280 and the post-filter element 222 can be extended, so that the partition piece 280 is connected with the upper end cover 250; the foregoing is merely illustrative, and the installation relationship and the matching relationship between the pre-filter 221 and the post-filter 222 in the first filter assembly 200 can be modified according to the actual use requirement.

When the pre-filter 221 and the post-filter 222 are installed at the same time, the partition 280 separates the pre-filter 221 and the post-filter 222 in the central tube 340 to ensure that waterways of the pre-filter 221 and the post-filter 222 are not confused; specifically, raw water enters from the first water inlet port 211, is filtered by the pre-filter element 221, is discharged through the first water outlet port 212 at the hollow part of the pre-filter element 221 to form first purified water, and enters into the filter flask 100 through the second water inlet 413 to be filtered by the second filter assembly 300; the water filtered by the second filtering assembly 300 is second purified water, the second purified water enters the partition 280 through the first water passing hole 340a, namely the second water passing hole 280a, and then the second purified water is filtered by the rear filter element 222 to form pure water, and the pure water passes through the hollow part of the rear filter element 222 and then is discharged out of the filter flask 100 through the limiting pipe 283 and the water outlet pipe 230 to the second water outlet port 213; the pure water discharged from the filter flask 100 is supplied to the user.

When only the pre-filter element 221 is installed, the raw water is filtered by the pre-filter element 221 to form first purified water, and then the first purified water is filtered by the second filter assembly 300 to form second purified water, and the second purified water directly enters the partition piece 280 and is discharged through the water outlet pipe 230 and the second water outlet port 213; or the front filter element 221 is integrally arranged in the central tube 340, the installation position of the rear filter element 222 is canceled, and a second purified water outlet is additionally arranged for discharging second purified water.

When only the post-filter 222 is installed, the water entering the second filter 300 still needs to be filtered by the pre-filter 221; the central tube 340 may also be integrally provided with the post-filter element 222, the installation position of the pre-filter element 221 is canceled, the setting of the partition 280 may be canceled if the installation position of the pre-filter element 221 is canceled, the setting of the water outlet tube 230 may be canceled after the setting of the partition 280 is canceled, and the second water outlet through-hole 213 and the first water outlet through-hole 212 are combined; the second purified water filtered through the second filtering assembly 300 still passes through the first water passing hole 340a or the first water passing hole 340a and the second water passing hole 280a, and is filtered through the post-filter 222, and is discharged out of the filter flask 100.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (13)

1. A composite filter element of a water purification apparatus, comprising:

a filter flask;

the central tube is arranged in the filter flask;

the first filter assembly comprises a rear filter element which is detachably arranged in the central tube;

and a second filter assembly, wherein an installation space is formed between the inner wall of the filter flask and the outer wall of the central tube, and the second filter assembly is arranged in the installation space.

2. The composite filter element of water purification equipment according to claim 1, wherein a filter bottle cap is arranged at the top end of the filter bottle, a second water inlet is formed in the filter bottle cap, the first filter component comprises a filter element cap, a second water outlet through hole is formed in the filter element cap, a clamping groove for embedding the filter element cap is formed in the filter bottle cap, a plurality of first water through holes are formed in the central tube, water enters the filter bottle through the second water inlet, and then enters the rear filter element through the first water through holes after being filtered by the second filter component, and is discharged through the second water outlet through hole.

3. The composite filter element of claim 2, wherein the first filter element further comprises a separator, the post filter element is disposed in the separator, a plurality of second water passing holes are formed in the separator, and the separator is connected with the filter element cover.

4. A composite filter element of a water purification apparatus as recited in claim 3, wherein said first water passing holes are in one-to-one correspondence with said second water passing holes.

5. A composite filter element of a water purification apparatus according to claim 3, wherein a water outlet pipe is provided at the top end of the partition member, and both ends of the water outlet pipe are respectively communicated with the partition member and the second water outlet.

6. The composite filter element of claim 5, wherein the separator is barrel-shaped, the bottom end of the separator is an opening of the separator, and a lower end cover is arranged on the bottom end of the separator and is used for limiting the rear filter element.

7. The composite filter element of claim 6, wherein the lower end cap is provided with a limiting protrusion protruding toward the inside of the partition, and the limiting protrusion and the inner wall of the partition cooperate to limit the rear filter element.

8. The composite filter element of water purification equipment according to claim 2, wherein a plurality of water gaps are formed in the filter element cover, the water gaps comprise second water outlet ports, a plurality of water channels are formed in the filter element cover, one of the water channels is communicated with the second water inlet, and the water gaps are communicated with the water channels in a one-to-one correspondence.

9. The composite filter element of a water purification apparatus of claim 8, wherein a longitudinal cross-sectional area of the water channel is smaller than a longitudinal cross-sectional area of the water port.

10. The composite filter element of claim 9, wherein the water gap is provided with a flexible interference member, and the flexible interference member interferes with the filter cap.

11. The composite filter element of claim 5, wherein the second filter assembly comprises a reverse osmosis filter element disposed between the inner wall of the filter flask and the center tube, a reverse osmosis top cover disposed on top of the reverse osmosis filter element and in sealing connection with the filter flask cover, and a reverse osmosis bottom cover disposed on bottom of the reverse osmosis filter element.

12. The composite filter element of claim 11, wherein the reverse osmosis top cover is provided with a through hole from which the central tube extends.

13. The composite filter element of claim 11, wherein the reverse osmosis top cover and the reverse osmosis bottom cover are each provided with a reverse osmosis filter element groove for fixing the reverse osmosis filter element.