Composite filter element and water purifier

Abstract

The invention discloses a composite filter element and a water purifier, the water purifier comprises the composite filter element, the composite filter element comprises a first filter assembly, the first filter assembly comprises a filter element cover, an upper end cover, a filter element and an inner cylinder, and the upper end cover is connected with the filter element cover; the filter element is connected to the upper end cover and comprises a front filter element and a rear filter element; the inner cylinder is used for separating the front filter element from the rear filter element; wherein one of the front filter element and the rear filter element is the front filter element, and the other one of the front filter element and the rear filter element is the rear filter element. According to the technical scheme, the front filter element and the rear filter element are integrally arranged, the front filter element and the rear filter element are arranged up and down, and the front filter element and the rear filter element are separated through the inner cylinder, so that the space occupied by the front filter element and the rear filter element in the first filter assembly is reduced; the miniaturization arrangement of the composite filter element and the water purifier is facilitated.

Description

Technical Field

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

[0002] In order to improve the quality of drinking water, common water purifiers generally use multi-stage filtration to reduce impurities in raw water.

[0003] Existing water purifiers are generally provided with a pre-filter element and a post-filter element, and the pre-filter element and the post-filter element are respectively arranged in two filter bottles, resulting in a large volume of the filter module in the water purifier, which occupies a large space and is not conducive to the miniaturization demand of the filter module in the water purifier. Summary of the invention

[0004] The main purpose of the present invention is to provide a composite filter element, aiming to reduce the space occupied by the front filter element and the rear filter element.

[0005] To achieve the above object, the composite filter element proposed in the present invention includes a first filter component, wherein the first filter component includes:

[0006] Filter cover;

[0007] An upper end cover, the upper end cover is connected to the filter element cover;

[0008] A filter element, the filter element comprising a pre-filter element and a post-filter element, the upper end of the pre-filter element being connected to the upper end cover;

[0009] The inner cylinder is used to separate the pre-filter element from the post-filter element, and the inner cylinder is connected to the lower end of the pre-filter element.

[0010] In one embodiment, the pre-filter element and the post-filter element are coaxially arranged.

[0011] In one embodiment, the length of the pre-filter element is greater than the length of the post-filter element.

[0012] In one embodiment, the inner cylinder includes a partition plate and a cylinder body connected to each other, the partition plate is used to separate the front filter element and the rear filter element, the cylinder body extends from the partition plate toward the rear filter element, and the rear filter element is located in the cylinder body.

[0013] In one embodiment, the filter element cover is provided with a pre-filter element water inlet, a pre-filter element water outlet and a post-filter element water outlet, the cylinder body is provided with a post-filter element water inlet, the pre-filter element is hollow, a first water passage is formed in the middle of the pre-filter element, water flowing in from the pre-filter element water inlet is filtered by the pre-filter element and then flows out from the pre-filter element water outlet through the first water passage, and the first filter assembly further includes:

[0014] A water outlet pipe, wherein the water outlet pipe is located in the first water passage, one end of the water outlet pipe is connected to the filter element cover, and one end of the water outlet pipe is connected to the inner cylinder. Water flowing in from the water inlet of the rear filter element is filtered by the rear filter element and then flows out from the water outlet of the rear filter element through the water outlet pipe.

[0015] In one embodiment, the filter element cover is provided with a first slot corresponding to the water outlet pipe, one end of the water outlet pipe is inserted into the first slot, and the first slot is connected to the water outlet of the post-filter element.

[0016] In one embodiment, the partition plate is provided with a protrusion toward the pre-filter element, the protrusion is provided with a second slot corresponding to the water outlet pipe, the other end of the water outlet pipe is inserted into the second slot, the post-filter element is hollow, the middle part of the post-filter element has a second water passage, and the second slot is connected to the second water passage.

[0017] In one embodiment, the inner cylinder further includes a first limiting portion extending from the partition plate toward the filter element cover, the first limiting portion is arranged around the outer circumference of the pre-filter element, and the first limiting portion is used to limit one end of the pre-filter element close to the inner cylinder.

[0018] In one embodiment, the upper end cover includes a second limiting portion extending toward the pre-filter element, the second limiting portion is arranged around the outer circumference of the pre-filter element, and the second limiting portion is used to limit one end of the pre-filter element close to the upper end cover.

[0019] In one embodiment, the partition plate is provided with a second protrusion toward the post-filter element, a groove is provided in the middle of the second protrusion, and the groove is connected to the second slot.

[0020] In one embodiment, an opening is provided on a side of the cylinder away from the pre-filter element, and the first filter assembly also includes a lower end cover, which is connected to the inner cylinder, one end of the post-filter element is connected to the partition plate, and the lower end cover is used to receive the other end of the post-filter element.

[0021] In one embodiment, the composite filter element further comprises a filter bottle, and the first filter assembly is detachably installed in the filter bottle.

[0022] The present invention also proposes a water purifier, which includes a composite filter element, the composite filter element includes a first filter component, the first filter component includes a filter element cover, an upper end cover, a filter element and an inner cylinder; the upper end cover is connected to the filter element cover; the filter element includes a pre-filter element and a post-filter element, the upper end of the pre-filter element is connected to the upper end cover; the inner cylinder is used to separate the pre-filter element from the post-filter element, and the inner cylinder is connected to the lower end of the pre-filter element.

[0023] The technical solution of the present invention adopts an integrated setting of the pre-filter element and the post-filter element, and arranges the pre-filter element and the post-filter element up and down, and separates the pre-filter element and the post-filter element by an inner cylinder, thereby reducing the space occupied by the pre-filter element and the post-filter element in the first filter component, which is beneficial to the miniaturization of the composite filter element and the water purifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 It is a schematic diagram of the structure of the composite filter element of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the composite filter element in a cross-sectional perspective;

[0027] Figure 3 is a schematic structural diagram of a first filter assembly;

[0028] Figure 4 is an exploded view of the first filter component;

[0029] Figure 5 is a schematic structural diagram of the first filter assembly in a cross-sectional perspective;

[0030] Figure 6 for Figure 3 The enlarged view of point A in the middle;

[0031] Figure 7 for Figure 5 The enlarged view of point B in the middle;

[0032] Figure 8 for Figure 5 Enlarged view of point C in the middle;

[0033] Fig. 9 It is a schematic diagram of the structure of the filter element cover, the upper end cover, the front filter element, the rear filter element, the inner cylinder and the lower end cover in a cross-sectional view;

[0034] Fig.10 an exploded view of the second filter assembly;

[0035] Fig.11 An exploded view of the filter cover assembly;

[0036] Fig.12 It is a schematic diagram of the structure of the filter element cover and the filter element handle.

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] 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

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In order to improve the quality of drinking water, common water purifiers generally use multi-stage filtration to reduce impurities in raw water.

[0045] Existing water purifiers are generally provided with a pre-filter element and a post-filter element, and the pre-filter element and the post-filter element are respectively arranged in two filter bottles, resulting in a large volume of the filter module in the water purifier, which occupies a large space and is not conducive to the miniaturization demand of the filter module in the water purifier.

[0046] In view of this, the present invention proposes a composite filter element 10 for installation in a water purification device to filter raw water (ie, tap water) passing therethrough so that the water quality meets the needs of the user before being used by the user.

[0047] See also Figures 1 to 12 The composite filter element 10 proposed in the present invention includes a filter bottle 100, a first filter component 200, a second filter component 300, and a filter cover component 400; a receiving chamber 110 is formed inside the filter bottle 100, the first filter component 200 and the second filter component 300 are arranged in the receiving chamber 110, and the first filter component 200 is located inside the second filter component 300, or the second filter component 300 is located inside the first filter component 200. It should be noted that the first filter component 200 and the second filter component 300 are respectively arranged in two independent chambers in the filter bottle 100. The filter bottle 100 is arranged in a barrel shape, and its upper end is open, and the filter cover component 400 covers the open end. The filter cover component 400 is provided with at least one water inlet end and at least one water outlet end, and the at least one water inlet end and the at least one water outlet end are both connected to the receiving chamber 110.

[0048] Specifically, the filter bottle 100 is used to be installed in a water purification device, and the second filter component 300 and the first filter component 200 are both arranged in the accommodating cavity 110 of the filter bottle 100; the first filter component 200 will filter out impurities contained in the water and / or improve the taste of the water, and the second filter component 300 will filter out various salt ions and other solutes in the water, thereby reducing the concentration of various salt ions and other solutes in the water and reducing the TDS value of the raw water.

[0049] The second filter assembly 300 includes a reverse osmosis filter element 310, a central tube 340, a reverse osmosis top cover 320 and a reverse osmosis bottom cover 330. The reverse osmosis filter element 310 is sleeved on the outer wall of the central tube 340, and the reverse osmosis filter element 310 is arranged between the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330. The upper end and the lower end of the reverse osmosis filter element 310 are fixed by the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330. Furthermore, the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 are also provided with a reverse osmosis filter element groove for the end of the reverse osmosis filter element 310 to be embedded; thus, the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 jointly fix the reverse osmosis filter element 310 in the filter bottle 100.

[0050] The filter cover assembly 400 includes a filter bottle cover 410 , a filter bottle handle 420 and a decorative cover 430 . The filter bottle handle 420 is rotatably connected to the filter bottle cover 410 , and the decorative cover 430 covers the filter bottle cover 410 .

[0051] In the embodiment of the present invention, Figures 1 to 9As shown, the first filter assembly 200 includes a filter element cover 210, an upper end cover 250, a filter element 220 and an inner cylinder 280; the upper end cover 250 is connected to the filter element cover 210; the filter element 220 includes a pre-filter element 221 and a post-filter element 222, and the upper end of the pre-filter element 221 is connected to the upper end cover 250; the inner cylinder 280 is used to separate the pre-filter element 221 from the post-filter element 222, and the inner cylinder 280 is connected to the lower end of the pre-filter element 221.

[0052] Specifically, the composite filter element 10 includes a first filter assembly 200, and the composite filter element 10 is integrated and arranged in the filter bottle 100. Correspondingly, the first filter assembly 200 is also integrated and arranged. In this embodiment, the filter element 220 includes at least a pre-filter element and a post-filter element. In addition, the composite filter element 10 may also include a reverse osmosis filter element 310.

[0053] It should be noted that the first filter assembly 200 includes a filter element cover 210. Considering that the life of the pre-filter element 221 is short, the filter element 220 needs to be replaced after a certain period of time. Therefore, the filter element cover 210 is provided with a filter element handle 270 that rotates with it. The entire first filter assembly 200 is lifted out of the cylinder 282 by the filter element handle 270, so that the first filter assembly 200 is easy to replace. Considering that the service life of the reverse osmosis filter element 310 is much longer than the service life of the pre-filter element 221, in order to avoid the reverse osmosis filter element 310 from being replaced before the service life is reached, only the first filter assembly 200 can be replaced when replacing, and the second filter assembly 300 is not replaced, which reduces the replacement cost and makes full use of the reverse osmosis filter element 310 in the second filter assembly 300.

[0054] Furthermore, the upper end cover 250 is connected to the filter element cover 210. In this embodiment, the upper end cover 250 and the filter element cover 210 are sealed. Of course, the upper end cover 250 and the filter element cover 210 can be glued or welded, which is not specifically limited here. The filter element 220 includes a pre-filter element 221 and a post-filter element 222. The upper end cover 250 is connected to the pre-filter element 221, and the upper end cover 250 is used to fix the pre-filter element 221.

[0055] The inner cylinder 280 is sealed and connected to the central tube 340 outside the first filter assembly 200, and the inner cylinder 280 is located between the pre-filter element 221 and the post-filter element 222. The central tube 340 is divided into two mutually unconnected first filter chamber and second filter chamber. In this embodiment, the first filter chamber is enclosed by the filter element cover 210, the upper end cover 250, the central tube 340 and the inner cylinder 280, and the second filter chamber is enclosed by the inner cylinder 280 and the central tube 340. The pre-filter element 221 is located in the first filter chamber, and the post-filter element 222 is located in the second filter chamber.

[0056] One end of the pre-filter element 221 is connected to the upper end cover 250, and the other end of the pre-filter element 221 is connected to the inner cylinder 280. The pre-filter element 221 and the post-filter element 222 are integrated into one by fixing the inner cylinder 280 and the pre-filter element 221.

[0057] Considering that when the water purifier starts to start, the interior of the pre-filter element 221 will be filled with water, and the pre-filter element 221 will move up and down due to the influence of gravity or buoyancy, and the pre-filter element 221 may also be deformed due to the pressure, which may have an adverse effect on the filtering effect of the pre-filter element 221. In view of this, one end of the pre-filter element 221 is connected to the upper end cover 250, and the other end of the pre-filter element 221 is connected to the inner cylinder 280 to fix the relative position of the pre-filter element 221. Among them, the connection method of the pre-filter element 221 and the upper end cover 250 in this embodiment is adhesive bonding, and the connection method of the pre-filter element 221 and the inner cylinder 280 is also adhesive bonding.

[0058] Specifically, considering the design of the flow path, the water entering the water inlet 213 of the post-filter element comes from the water filtered by the reverse osmosis filter element 310. The water entering the reverse osmosis filter element 310 is pressurized by a pressure pump and enters the reverse osmosis filtration assembly 300. It passes through the reverse osmosis filter element 310 near the bottom of the filter bottle 100 and then enters the second filter chamber for filtration. In view of this, the post-filter element 222 is arranged on the lower side of the pre-filter element 221.

[0059] Specifically, in this embodiment, the pre-filter element 221 and the post-filter element 222 can be arranged in a cylindrical shape. Of course, the pre-filter element 221 and the post-filter element 222 can also be arranged in a semi-cylindrical shape, which means that the cylinder is cut into half of the original shape along the radial direction of the cylinder. In this embodiment, the pre-filter element 221 is located on the upper side of the post-filter element 222. Of course, the pre-filter element 221 can also be arranged on the lower side of the post-filter element 222. In addition, the pre-filter element 221 and the post-filter element 222 can also be arranged inside and outside, that is, the pre-filter element 221 is located inside the post-filter element 222 or the post-filter element 222 is located inside the pre-filter element 221. When the pre-filter element 221 and the post-filter element 222 are arranged in a semi-cylindrical shape, the pre-filter element 221 and the post-filter element 222 can be roughly assembled into a complete cylinder, separated by the inner cylinder 280 in the middle. The above are all optional embodiments of the pre-filter element 221 and the post-filter element 222 .

[0060] The pre-filter element 221 is generally the first water purification step of the water purifier, used to filter out larger particles or floating objects in the water, and the post-filter element 222 is generally the last water purification step of the water purifier, used to adjust the taste of the purified water.

[0061] The technical solution of the present invention adopts an integrated setting of the pre-filter element 221 and the post-filter element 222, and arranges the pre-filter element 221 and the post-filter element 222 up and down, and separates the pre-filter element 221 and the post-filter element 222 by the inner cylinder 280, thereby reducing the space occupied by the pre-filter element 221 and the post-filter element 222 in the first filter component, which is beneficial to the miniaturization of the composite filter element 10 and the water purifier.

[0062] In one embodiment, see Figure 5 The front filter element 221 and the rear filter element 222 are coaxially arranged.

[0063] It should be noted that the coaxial arrangement of the pre-filter element 221 and the post-filter element 222 can further reduce the axial space occupied by the filter element 220. Moreover, the coaxial arrangement of the pre-filter element 221 and the post-filter element 222 can also make installation easier and facilitate internal flow path arrangement.

[0064] In one embodiment, see Figure 5 , the length of the front filter element 221 is greater than the length of the rear filter element 222.

[0065] When filtering through the reverse osmosis filter element 310, part of the waste water is discharged. In view of this, the water passing through the pre-filter element 221 is more than the water passing through the post-filter element 222. The length of the post-filter element 222 is set to be smaller than the length of the pre-filter element 221, further reducing the volume of the composite filter element 10.

[0066] Furthermore, the upper end cover 250 has a first connection surface 252 glued to the pre-filter element 221, and a plurality of first convex ribs 252a are arranged on the first connection surface 252, and the end of the first convex rib 252a close to the pre-filter element 221 is sharp, so that the first convex rib 252a is inserted into the pre-filter element 221, and the pre-filter element 221 is further fixed. Similarly, the inner cylinder 280 has a second connection surface 281c glued to the pre-filter element 221, and a plurality of second convex ribs 281c1 are arranged on the second connection surface 281c, and the end of the second convex rib 281c1 close to the pre-filter element 221 is sharp, so that the second convex rib 281c1 is inserted into the pre-filter element 221, and the pre-filter element 221 is further fixed.

[0067] In one embodiment, see Figure 4 and Figure 5 The inner cylinder 280 includes a partition plate 281 and a cylinder body 282 connected to each other. The partition plate 281 is used to separate the front filter element 221 and the rear filter element 222. The cylinder body 282 extends from the partition plate 281 toward the rear filter element 222. The rear filter element 222 is located in the cylinder body 282.

[0068] It should be noted that the inner cylinder 280 includes a connected partition plate 281 and a cylinder body 282, and the partition plate 281 and the cylinder body 282 can be welded together or melted into one. The rear filter element 222 is completely placed in the cylinder body 282, which can further protect the rear filter element 222 and prevent the rear filter element 222 from being squeezed and deformed by excessive water pressure.

[0069] In one embodiment, see Figure 5 and Figure 6 The filter element cover 210 is provided with a pre-filter element water inlet 211, a pre-filter element water outlet 212, and a post-filter element water outlet 213. The cylinder 282 is provided with a post-filter element water inlet 211. The pre-filter element 221 is hollow, and a first water passage 221a is formed in the middle of the pre-filter element 221. Water flowing in from the pre-filter element water inlet 211 is filtered by the pre-filter element 221 and flows out from the pre-filter element water outlet through the first water passage 221a. The first filter assembly 200 also includes:

[0070] A water outlet pipe 230 is located in the first water passage 221a, one end of the water outlet pipe 230 is connected to the filter element cover 210, and one end of the water outlet pipe 230 is connected to the inner cylinder 280. Water flowing in from the water inlet 211 of the post-filter element is filtered by the post-filter element 222 and then flows out from the water outlet 213 of the post-filter element through the water outlet pipe 230.

[0071] Specifically, in this embodiment, a pre-filter water inlet 211 and a pre-filter water outlet 212 are provided on the filter cover 210. Of course, the pre-filter water inlet 211 and the pre-filter water outlet 212 can also be provided on the cylinder 282, and the pre-filter water inlet 211 and the pre-filter water outlet 212 can also be provided on the upper end cover 250. A water gap is formed between the central cylinder and the pre-filter 221, and the water gap is connected with the pre-filter water inlet 211. Water flows into the first filter assembly 200 from the pre-filter water inlet 211, flows through the water gap into the pre-filter 221 for filtration, and the filtered water after being filtered by the pre-filter 221 flows out from the pre-filter water outlet 212 through the first water passage 221a.

[0072] The filter element cover 210 is also provided with a post filter element water outlet 213, and the cylinder 282 is provided with a post filter element water inlet 211 corresponding to the second filter chamber. Since the first filter assembly 200 is integrated, in order to simplify the external flow path, a water outlet pipe 230 is provided in the first water passage 221a. The water outlet pipe 230 is cylindrical, one end of the water outlet pipe 230 is connected to the filter element cover 210 and communicated with the post filter element water outlet 213, and the other end of the water outlet pipe 230 is connected to the inner cylinder 280 and communicated with the filtered water after passing through the post filter element 222. Water flows in from the post filter element water inlet 211 and flows out from the post filter element water outlet 213 through the water outlet pipe 230 after being filtered by the post filter element 222.

[0073] Optionally, see Figure 5 The filter element cover 210 is provided with a first slot 214 corresponding to the water outlet pipe 230 , one end of the water outlet pipe 230 is inserted into the first slot 214 , and the first slot 214 is connected to the post-filter element water outlet 213 .

[0074] According to the previous embodiment, one end of the water outlet pipe 230 is connected to the filter element cover 210. Further, the filter element cover 210 is provided with a first slot 214 corresponding to the water outlet pipe 230, one end of the water outlet pipe 230 is inserted into the first slot 214, and the first slot 214 is connected to the post-filter element water outlet 213. The diameter is substantially consistent with the outer diameter of the water outlet pipe 230, so that the first slot 214 can better limit the water outlet pipe 230. Considering that the water outlet pipe 230 should be separated from the first water passage 221a, a first sealing ring 510 is provided between the water outlet pipe 230 and the first slot 214, and the water outlet pipe 230 is separated from the first water passage 221a by the first sealing ring 510. It should be noted that in order to prevent the water outlet pipe 230 from being connected to the external water channel, a seal may be provided between the first slot 214 and the water outlet pipe 230 so that one end of the water outlet pipe 230 is sealed with the water channel outside the water outlet pipe 230 without interfering with each other, so that the filtered water flowing out of the water outlet pipe 230 does not contain impurities in other water channels.

[0075] Optionally, see Figure 8 The partition plate 281 is provided with a protrusion 281a toward the pre-filter element 221, and the protrusion 281a is provided with a second slot 281a1 corresponding to the water outlet pipe 230, and the other end of the water outlet pipe 230 is inserted into the second slot 281a1, the post-filter element 222 is hollow, and the middle part of the post-filter element 222 has a second water passage 222a, and the second slot 281a1 is connected to the second water passage 222a.

[0076] According to the above embodiment, the inner cylinder 280 includes a partition plate 281. Considering that the thickness of the partition plate 281 is relatively thin, it is difficult to form a deeper slot for limiting the water outlet pipe 230. In view of this, the partition plate 281 is provided with a protrusion 281a toward the pre-filter element 221, and the protrusion 281a is provided with a second slot 281a1 corresponding to the water outlet pipe 230. The diameter of the second slot 281a1 is substantially consistent with the outer diameter of the water outlet pipe 230, so that the second slot 281a1 can better limit the water outlet pipe 230 after being inserted. Considering that the water outlet pipe 230 should be separated from the second water passage 222a, a second sealing ring 520 is provided between the water outlet pipe 230 and the second slot 281a1, and the water outlet pipe 230 is separated from the first water passage 221a by the second sealing ring 520. It should be noted that in order to prevent the water outlet pipe 230 from communicating with the external water channel, a seal may be provided between the second slot 281a1 and the water outlet pipe 230 so that one end of the water outlet pipe 230 is sealed with the water channel outside the water outlet pipe 230 without interfering with each other, so that the filtered water flowing out of the water outlet pipe 230 does not contain impurities in other water channels.

[0077] In one embodiment, see Figures 5 to 8 The inner cylinder 280 also includes a first limiting portion 283 extending from the partition plate 281 toward the filter element cover 210. The first limiting portion 283 is arranged around the outer periphery of the pre-filter element 221. The first limiting portion 283 is used to limit the pre-filter element 221 to one end close to the inner cylinder 280.

[0078] Specifically, the first limiting portion 283 is disposed around the outer circumference of the pre-filter element 221 to limit the end of the pre-filter element 221 close to the inner cylinder 280 to prevent the pre-filter element 221 from being squeezed outward and deformed due to excessive internal water pressure.

[0079] In one embodiment, see Figure 8 The upper end cover 250 includes a second limiting portion 251 extending toward the pre-filter element 221 , the second limiting portion 251 is arranged around the outer periphery of the pre-filter element 221 , and the second limiting portion 251 is used to limit the pre-filter element 221 to one end close to the upper end cover 250 .

[0080] According to the previous embodiment, in this embodiment, the second limiting portion 251 is arranged around the outer circumference of the pre-filter element 221, and is used to limit one end of the pre-filter element 221 close to the upper end cover 250. Therefore, the first limiting portion 283 and the second limiting portion 251 respectively limit the two ends of the pre-filter element 221, further preventing the pre-filter element 221 from being squeezed outward and deformed due to excessive internal water pressure. When the consumables are small, it has a good limiting function.

[0081] In one embodiment, see Figure 8The partition plate 281 is provided with a second protrusion 281a facing the post-filter element 222, and a groove is provided in the middle of the second protrusion 281a, and the groove is connected to the second slot 281a1.

[0082] In this embodiment, the partition plate 281 is also provided with a second protrusion 281a facing the post-filter element 222, and the second protrusion 281a is oriented in the opposite direction to the first protrusion 281a, and a groove is provided in the middle of the second protrusion 281a, and the groove is connected to the second slot 281a1 to keep the water outlet of the post-filter element 222 connected, wherein the second protrusion 281a is used to strengthen the structural strength of the inner tube 280, especially to strengthen the structural strength of the partition plate 281.

[0083] In one embodiment, see Figure 5 The cylinder 282 has an opening 282b on one side away from the pre-filter element 221. The first filter assembly 200 also includes a lower end cover 260, which is connected to the inner cylinder. One end of the post-filter element 222 is connected to the partition plate 281, and the lower end cover 260 is used to receive the other end of the post-filter element 222.

[0084] Specifically, an opening 282b is provided on one side of the cylinder 282 away from the pre-filter element 221, wherein the opening 282b is provided for installing the post-filter element 222 into the inner cylinder, and after the post-filter element 222 is installed into the inner cylinder, the lower end cover 260 is inserted into the inner cylinder from the opening 282b, and the lower end cover 260 is interference fit with the inner wall of the inner cylinder. One end of the post-filter element 222 is connected to the partition plate 281, and the connection method here is adhesive bonding, and the lower end cover 260 is used to receive the other end of the post-filter element 222, wherein the lower end cover 260 may be connected to the post-filter element 222, or may not be connected to the post-filter element 222.

[0085] In one embodiment, the composite filter element 10 further includes a filter bottle 100 , and the first filter assembly 200 is detachably installed in the filter bottle 100 .

[0086] Specifically, considering that the life of the pre-filter element 221 is short and needs to be replaced after a certain period of time, and the service life of the reverse osmosis filter element 310 is much longer than the service life of the pre-filter element, in order to avoid the reverse osmosis filter element 310 being replaced before its service life is reached, only the first filter component 200 can be replaced during replacement, and the second filter component 300 is not replaced, so that the first filter component 200 is detachably installed in the filter bottle 100. Such an arrangement reduces the cost of replacing the element and makes full use of the reverse osmosis filter element 310 in the second filter component 300.

[0087] The present invention also proposes a water purifier, which includes a composite filter element 10. The specific structure of the composite filter element 10 refers to the above embodiment. Since the water purifier adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0088] 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 composite filter element, characterized in that: The invention comprises a first filter assembly, wherein the first filter assembly comprises: Filter cover; An upper end cover, the upper end cover is connected to the filter element cover; A filter element, the filter element comprising a pre-filter element and a post-filter element, the upper end of the pre-filter element being connected to the upper end cover; The inner cylinder is used to separate the pre-filter element from the post-filter element, and the inner cylinder is connected to the lower end of the pre-filter element.

2. The composite filter element according to claim 1, characterized in that: The front filter element and the rear filter element are coaxially arranged.

3. The composite filter element according to claim 1, characterized in that: The length of the front filter element is greater than the length of the rear filter element.

4. The composite filter element according to claim 1, characterized in that: The inner cylinder comprises a partition plate and a cylinder body connected to each other, wherein the partition plate is used to separate the front filter element and the rear filter element, and the cylinder body is formed by extending from the partition plate toward the rear filter element, and the rear filter element is located in the cylinder body.

5. The composite filter element according to claim 4, characterized in that: The filter element cover is provided with a pre-filter element water inlet, a pre-filter element water outlet and a post-filter element water outlet, the cylinder body is provided with a post-filter element water inlet, the pre-filter element is hollow, a first water passage is formed in the middle of the pre-filter element, water flowing in from the pre-filter element water inlet is filtered by the pre-filter element and then flows out from the pre-filter element water outlet through the first water passage, and the first filter assembly further includes: A water outlet pipe, wherein the water outlet pipe is located in the first water passage, one end of the water outlet pipe is connected to the filter element cover, and one end of the water outlet pipe is connected to the inner cylinder. Water flowing in from the water inlet of the rear filter element is filtered by the rear filter element and then flows out from the water outlet of the rear filter element through the water outlet pipe.

6. The composite filter element according to claim 5, characterized in that: The filter element cover is provided with a first slot corresponding to the water outlet pipe, one end of the water outlet pipe is inserted into the first slot, and the first slot is connected to the water outlet of the post-filter element.

7. The composite filter element according to claim 6, characterized in that: The partition plate is provided with a protrusion toward the front filter element, and the protrusion is provided with a second slot corresponding to the water outlet pipe, and the other end of the water outlet pipe is inserted into the second slot. The rear filter element is hollow, and a second water passage is provided in the middle of the rear filter element, and the second slot is connected to the second water passage.

8. The composite filter element according to claim 4, characterized in that: The inner cylinder further comprises a first limiting portion extending from the partition plate toward the filter element cover, the first limiting portion being arranged around the outer circumference of the pre-filter element, and being used for limiting an end of the pre-filter element close to the inner cylinder.

9. The composite filter element according to claim 8, characterized in that: The upper end cover includes a second limiting portion extending toward the pre-filter element, the second limiting portion is arranged around the outer circumference of the pre-filter element, and the second limiting portion is used to limit an end of the pre-filter element close to the upper end cover.

10. The composite filter element according to claim 4, characterized in that: The partition plate is provided with a second protrusion toward the post-filter element, a groove is provided in the middle of the second protrusion, and the groove is connected to the second slot.

11. The composite filter element according to claim 4, characterized in that: The cylinder body has an opening on one side away from the front filter element. The first filter assembly also includes a lower end cover, which is connected to the inner cylinder. One end of the rear filter element is connected to the partition plate, and the lower end cover is used to receive the other end of the rear filter element.

12. The composite filter element according to claim 4, characterized in that: The composite filter element further comprises a filter bottle, in which the first filter assembly is detachably mounted.

13. A water purifier, characterized in that: Comprising the composite filter element as described in any one of claims 1 to 12.

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