Composite filter element of water purification equipment

Abstract

The invention discloses a composite filter element of water purification equipment. The composite filter element comprises a filter bottle; the central pipe is arranged in the filter bottle; the first filtering assembly is detachably arranged in the central pipe; a mounting space is formed between the inner wall of the filter bottle and the outer wall of the central pipe, and the second filter assembly is arranged in the mounting space; the first filter assembly comprises a front filter element, a separator and a rear filter element, the separator is connected to the bottom end of the front filter element, the rear filter element is arranged in the separator, and the separator separates the front filter element from the rear filter element. According to the technical scheme, the front filter element and the rear filter element are integrated, so that the front filter element and the rear filter element are integrally detachable compared with the composite filter element, and then replacement of the front filter element and the rear filter element is completed.

Description

Technical Field

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

[0002] Water purification equipment refers to equipment used to produce clean water, which is often used in daily drinking, chemical industry, medical treatment, breeding, planting, food, beverage and other fields.

[0003] In existing water purification equipment, filter elements are often used to filter water, and in order to reduce the overall volume of the water purification equipment, filter elements with different functions are integrated into one, and the composite filter element used is generally a 3-stage or 4-stage filter element; the composite filter element generally includes a pre-filter element for filtering large particles such as flocs, a reverse osmosis filter element for reducing the salt ion concentration in the water and filtering microorganisms, and a post-filter element for improving the taste of purified water.

[0004] The service life of a reverse osmosis filter element is often longer than that of a pre-filter element and a post-filter element. When the pre-filter element or the post-filter element reaches the end of its service life and needs to be replaced, since the filter element has been integrated and composited, the reverse osmosis filter element will be replaced along with the pre-filter element or the post-filter element or all three at the same time, thus wasting the service life of the reverse osmosis filter element. Summary of the invention

[0005] The main purpose of the present invention is to provide a composite filter element for a water purification device, so that only the post-filter element can be replaced when the post-filter element reaches the end of its service life.

[0006] To achieve the above-mentioned purpose, the composite filter element of the water purification equipment proposed by the present invention comprises:

[0007] Filter bottle;

[0008] A central tube, the central tube being disposed in the filter bottle;

[0009] a first filter assembly, the first filter assembly being detachably disposed in the central tube;

[0010] A second filter assembly, wherein an installation space is formed between the inner wall of the filter bottle and the outer wall of the central tube, and the second filter assembly is disposed in the installation space;

[0011] Wherein, the first filter assembly includes a pre-filter element, a partition and a post-filter element, the partition is connected to the bottom end of the pre-filter element, the post-filter element is arranged in the partition, and the partition separates the pre-filter element and the post-filter element.

[0012] Optionally / in one embodiment, the partition includes a partition plate and a cylinder, the bottom end of the pre-filter element is connected to one side of the partition plate, the top end of the cylinder is connected to the other side of the partition plate, and the post-filter element is arranged in the cylinder.

[0013] Optionally / in one embodiment, an upper end cover is connected to the top of the pre-filter element, a filter element cover is connected to the upper end cover, and a filter element handle is provided on the filter element cover.

[0014] Optionally / in one embodiment, a filter bottle cover is sealingly connected to the filter bottle, a filter bottle handle is provided on the filter bottle cover, and a snap-in groove for the filter element cover to be embedded is opened on the filter bottle cover.

[0015] Optionally / in one embodiment, the filter element cover is provided with a plurality of water inlets, the filter bottle cover is provided with a plurality of water channels, and the water inlets are connected to the water channels in a one-to-one correspondence.

[0016] Optionally / in one embodiment, the longitudinal cross-sectional area of ​​the water channel is smaller than the longitudinal cross-sectional area of ​​the water outlet.

[0017] Optionally / in one embodiment, a flexible abutment is provided on the water inlet, and the flexible abutment abuts against the top cover of the filter bottle.

[0018] Optionally / in one embodiment, a water outlet pipe is provided on the partition plate, and the water outlet pipe passes through the pre-filter element and is connected to one of the plurality of water outlets.

[0019] Optionally / in one embodiment, the water outlet pipe is sealed and connected to the filter element cover, and a first welding piece is provided on the top end of the water outlet pipe, and the first welding piece is fixedly connected to the filter element cover.

[0020] Optionally / in one embodiment, the reverse osmosis component includes a reverse osmosis filter element, a reverse osmosis top cover and a reverse osmosis bottom cover, the reverse osmosis filter element is arranged between the inner wall of the filter bottle and the outer cylinder, the reverse osmosis top cover is arranged on the top of the reverse osmosis filter element, and the reverse osmosis bottom cover is arranged on the bottom of the reverse osmosis filter element.

[0021] Optionally / in one embodiment, the reverse osmosis top cover is provided with a through opening for the outer cylinder to extend out.

[0022] Optionally / in one embodiment, a plurality of first water holes are provided on the central tube, and a plurality of second water holes are provided on the cylinder body.

[0023] Optionally / in one embodiment, the upper end cover is sealed to the filter element cover, and the reverse osmosis top cover is sealed to the filter bottle cover.

[0024] Optionally / in one embodiment, the water outlet includes a first water inlet, a first water outlet and a second water outlet, the first water inlet is used to introduce water into the pre-filter element, the first water outlet is used to discharge water filtered by the pre-filter element, and the second water outlet is connected to the water outlet pipe.

[0025] Optionally / in one embodiment, the filter bottle cover is provided with a first water inlet, a second water inlet, a first water outlet, a second water outlet and a waste water outlet;

[0026] Among them, the first water inlet is communicated with the first water inlet through a water channel, the first water outlet is communicated with the first water outlet through a water channel, the second water outlet is communicated with the second water outlet through a water channel, and the second water inlet and the wastewater outlet are respectively communicated with the installation space through a water channel.

[0027] The technical solution of the present invention integrates the pre-filter element and the post-filter element so that the pre-filter element and the post-filter element can be independent of the reverse osmosis filter element, thereby making the pre-filter element and the post-filter element detachable as a whole compared to the composite filter element, thereby completing the replacement of the pre-filter element and the post-filter element, making full use of the service life of the reverse osmosis filter element and reducing the overall use cost of the composite filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a schematic diagram of the overall structure of the composite filter element of the water purification device of the present invention;

[0030] Figure 2 An exploded view of the overall structure of the composite filter element of the water purification device of the present invention;

[0031] Figure 3 for Figure 2 A magnified view of part A;

[0032] Figure 4 It is the overall structural schematic diagram of the filter bottle cover;

[0033] Figure 5 It is an exploded view of the overall structure of the second filter assembly;

[0034] Figure 6 It is a cross-sectional schematic diagram of a composite filter element of a water purification device of the present invention;

[0035] Figure 7 for Figure 6 A magnified view of part B;

[0036] Figure 8 for Figure 6Enlarged view of part C;

[0037] Fig. 9 It is a cross-sectional schematic diagram of the first filter assembly of the present invention;

[0038] Fig.10 for Fig. 9 A magnified view of part D in the middle;

[0039] Fig.11 for Fig. 9 Enlarged view of part E in the middle;

[0040] Fig.12 A schematic diagram of the matching relationship between the filter element cover and the filter bottle cover of the present invention;

[0041] Fig.13 It is a structural explosion diagram of the filter element cover and the filter bottle cover of the present invention;

[0042] Fig.14 It is a structural explosion diagram of the filter element cover and the filter bottle cover from another perspective of the present invention;

[0043] Fig.15 It is a schematic diagram of the overall flow path of the composite filter element of the water purification equipment of the present invention.

[0044] Description of Figure Numbers:

[0045]

[0046]

[0047] 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

[0048] 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.

[0049] 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.

[0050] 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.

[0051] The present invention proposes a composite filter element for a water purification device, by setting a central tube 340 in a filter bottle 100, installing a second filter component 300 between the filter bottle 100 and the central tube 340, and then detachably installing the first filter component 200 in the central tube 340, so that the overall disassembly of the first filter component 200 is independent of the second filter component 300, and then only the post-filter element 222 can be replaced when the service life of the post-filter element 222 reaches the end of its service life, and the service life of the reverse osmosis filter element 310 in the second filter component 300 can be fully utilized, thereby reducing the overall use cost of the composite filter element.

[0052] The composite filter element proposed in the present invention includes a filter bottle 100, a first filter component 200, a second filter component 300 and a central tube 340; wherein, the filter bottle 100 is directly installed in the water purification equipment or is arranged outside the water purification equipment and connected to the water purification equipment, and the central tube 340 is arranged in the filter bottle 100, so that an installation space is formed between the inner wall of the filter bottle 100 and the outer wall of the central tube 340, and the second filter component 300 is arranged in the installation space of the filter bottle 100; the second filter component 300 will filter the 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 component 200 is detachably installed in the central tube 340, and will filter out impurities contained in the water and / or improve the taste of the water.

[0053] It should be noted that, in the present embodiment, the first filter component 200 includes a post-filter element 222, that is, the purpose of the first filter component 200 includes filtering the purified water filtered by the second filter component 300 to improve the drinking taste of the purified water.

[0054] Specifically, the central tube 340 is coaxially arranged in the filter bottle 100, and a filter bottle cap 410 is arranged on the top of the filter bottle 100. The second filter assembly 300 includes a reverse osmosis filter element 310, and the reverse osmosis filter element 310 is arranged in the installation space formed between the inner wall of the filter bottle 100 and the outer wall of the central tube 340. In order to fix the reverse osmosis filter element 310 in the filter bottle 100, the second filter assembly 300 also includes a reverse osmosis top cover 320 and a reverse osmosis bottom cover 330. The reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 are respectively arranged on the top and bottom of the reverse osmosis filter element 310, and the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 are both provided with a reverse osmosis filter element 310 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; and the filter bottle cover 410 is used to provide a seal for the filter bottle 100, thereby ensuring the normal operation of the reverse osmosis filter element 310.

[0055] The first filter assembly 200 is disposed in the central tube 340; specifically, the central tube 340 is used to provide a storage space for the first filter assembly 200, and the central tube 340 will block the direct contact between the first filter assembly 200 and the reverse osmosis filter element 310, thereby blocking the direct impact of the water flow on the first filter assembly 200, and ensuring the overall service life of the first filter assembly 200. Accordingly, when filtering water, the water flow will flow from the inner wall of the filter bottle 100 to the outer wall of the central tube 340, so that the water flow will flow through the reverse osmosis filter element 310, thereby reducing the concentration of solutes such as salt ions in the water.

[0056] It should be noted that a wastewater outlet 415 is provided on the filter bottle cover 410, and the wastewater 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 fitted with the central tube 340, so that after the water flow enters the reverse osmosis filter element 310, only a part of the water will pass through the reverse osmosis filter element 310 under the action of pressure, and the remaining part of the water flow cannot completely pass through the reverse osmosis filter element 310 but passes through the reverse osmosis top cover 320 and then is discharged from the filter bottle 100 through the wastewater outlet 415; reverse osmosis filtration separates solutes in water based on the different rates at which solutes such as salt ions and water molecules pass through the reverse osmosis filter membrane, so that the water that does not pass through the reverse osmosis filter element 310 and enters the wastewater outlet 415 will take away most of the impurity solutes such as salt ions, thereby ensuring the overall filtering effect of the second filter component 300.

[0057] 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 to the filter element cover 210, and the filter bottle cover 410 is provided with a clamping groove 418 for the filter element cover 210 to be embedded, and the setting of the clamping groove 418 enables the first filter assembly 200 as a whole to be directly inserted into the central tube 340 or directly removed from the central tube 340. Thus, it is convenient to disassemble the first filter assembly 200; the filter bottle cover 410 is provided with a second water inlet 413, the filter element cover 210 is provided with a second water outlet 213, and the central tube 340 is provided with a plurality of first water holes 340a, and the water flows into the filter bottle 100 through the second water inlet 413, and then enters the post filter element 222 through the first water holes 340a after being filtered by the second filter assembly 300, and then is discharged through the second water outlet 213.

[0058] In order to match the detachability of the first filter assembly 200 , a through hole 321 is provided on the reverse osmosis top cover 320 for the central tube 340 to extend out, so that the first filter assembly 200 can be directly taken out of the central tube 340 when the first filter assembly 200 is disassembled.

[0059] It should be noted in the present embodiment that the first filter assembly 200 further includes an upper end cover 250 and a lower end cover 260, the rear filter element 222 is arranged in the central tube 340, the upper end cover 250 is connected to the top end of the rear filter element 222, and the lower end cover 260 is arranged on the bottom end of the rear filter element 222; and the filter element cover 210 is connected to the upper end cover 250, and a filter element handle 270 is arranged on the filter element cover 210; therefore, when the first filter assembly 200 needs to be replaced, the user can lift the filter element handle 270 and bring up the filter element cover 210, and the filter element cover 210 will bring up the upper end cover 250, the rear filter element 222 and the lower end cover 260, thereby lifting the first filter assembly 200 as a whole; thereby completing the replacement of the first filter assembly 200.

[0060] In other embodiments, the first filter component 200 may be additionally provided with a pre-filter element 221 to filter impurities such as particulate matter and flocs contained in the water flow before the water flows through the second filter component 300; specifically, the pre-filter element 221 can be arranged between the upper end cover 250 and the rear filter element 222, the pre-filter element 221 can also be arranged between the lower end cover 260 and the rear filter element 222, the pre-filter element 221 can also be arranged in parallel with the rear filter element 222 between the upper end cover 250 and the lower end cover 260, or the rear filter element 222 can be replaced as a whole with the pre-filter element 221.

[0061] It should be noted that when there is a pre-filter element 221, the water flow will first flow through the pre-filter element 221, and then enter the post-filter element 222 after being filtered by the second filter component 300. Therefore, the flow path can be set according to the specific settings of the pre-filter element 221 and the post-filter element 222.

[0062] It should be further explained 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 cover 250; a plurality of second water holes 280a are provided on the partition 280, and when the water flows through the reverse osmosis filter element 310, it can enter the partition 280 through the first water hole 340a and the second water hole 280a, and then the water flows through the post filter element 222 and is filtered; when the water flows through the reverse osmosis filter element 310, the water flows through the first water hole 340a and the second water hole 280a, and then the water flows through the post filter element 222 and is filtered; Before the filter element 310, that is, after the water flow is filtered by the pre-filter element 221, it will be pressurized by the booster pump to increase the water pressure to pass through the reverse osmosis filter element 310. The water flow still has a high pressure after passing through the reverse osmosis filter element 310. The central tube 340 will block part of the water pressure, but the post-filter element 222 may still be damaged due to excessive water pressure. Therefore, the setting of the partition 280 will further reduce the impact of the water flow on the post-filter element 222, thereby further improving the structural stability and service life of the post-filter element 222.

[0063] The partition 280 includes a partition plate 281 and a barrel 282. The bottom end of the pre-filter element 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 hole 280a is opened on the barrel 282. The post-filter element 222 is installed in the barrel 282.

[0064] Correspondingly, the first water hole 340a corresponds to the second water hole 280a one by one, so that the water flow can pass through the tube wall of the central tube 340 and the barrel 282 of the partition 280 more smoothly and enter the partition 280; when the water flow is filtered by the post-filter element 222, a water outlet pipe 230 is provided on the top of the partition 280, and the two ends of the water outlet pipe 230 are respectively connected to the partition 280 and the second water outlet port 213, so that the water flow can be discharged from the second water outlet port 213 through the water outlet pipe 230 after being filtered by the partition 280.

[0065] It should be noted that the bottom end of the partition 280 is the opening of the partition 280, and the lower end cover 260 is arranged on the bottom end of the partition 280, so that the lower end cover 260 can limit the position of the post-filter element 222; and when installing, the post-filter element 222 can be placed in the partition 280 first, and then the partition 280 can be closed by the lower end cover 260; specifically, the lower end cover 260 protrudes toward the inside of the partition 280 to form a limiting portion 410b1, and the limiting portion 410b1 and the inner wall of the partition 280 jointly limit the post-filter element 222. Limiting; the top of the partition 280 also protrudes into the cylinder to form a limiting tube 283, the limiting tube 283 is connected to the water outlet pipe 230, and the limiting tube 283 and the inner wall of the partition 280 jointly limit the rear filter element 222, so that the limiting portion 410b1, the limiting tube 283 and the inner wall of the partition 280 will jointly limit the rear filter element 222, reducing the movable range of the rear filter element 222, thereby improving the structural strength of the rear filter element 222, and reducing the possibility of the rear filter element 222 being damaged by the impact of water flow.

[0066] It should also be noted that the water outlet pipe 230 is used to discharge the filtered water in the post-filter element 222. When the first filter assembly 200 is in use, the water outlet pipe 230 passes through the first filter chamber 710. The filter element cover 210 is provided with a first slot 240a corresponding to the water outlet pipe 230. One end of the water outlet pipe 230 is inserted into the first slot 240a, and the first slot 240a is connected to the second water outlet port 213. The caliber of the first slot 240a is substantially consistent with the outer diameter of the water outlet pipe 230, so that the first slot 240a can better limit the water outlet pipe 230. Considering that the water outlet pipe 230 should be separated from the first water passage, a first sealing ring is provided between the water outlet pipe 230 and the first slot 240a, and the water outlet pipe 230 is separated from the external waterway by the first sealing ring to prevent the water outlet pipe 230 from leaking or seeping. The partition 280 is provided with a second slot 287a corresponding to the water outlet pipe 230. The diameter of the second slot 287a is substantially consistent with the outer diameter of the water outlet pipe 230, so that the second slot 287a can better limit the water outlet pipe 230. Considering that water exchange should not occur between the water outlet pipe 230 and the first filter chamber 710, a second sealing ring 287b is provided between the water outlet pipe 230 and the second slot 287a, and the water channel of the water outlet pipe 230 and the first filter chamber 710 is separated by the second sealing ring 287b to avoid water exchange. After being filtered by the post-filter element 222, water flows out from the second water outlet 213 through the water outlet pipe 230.

[0067] In addition, the number of the first sealing rings in this embodiment is two, but it is not limited to this embodiment. The number of the first sealing rings can be one, three, or more. The number of the second sealing rings 287b in this embodiment is two, but it is not limited to this embodiment. The number of the second sealing rings 287b can be one, three, or more.

[0068] The technical solution of the present invention adopts a sealing connection between the filter element cover 210 and the upper end cover 250, and a first sealing ring is provided between the water outlet pipe 230 and the groove wall of the first slot 240a, and a second sealing ring 287b is provided between the water outlet pipe 230 and the groove wall of the second slot 287a, so as to seal the internal water path of the water outlet pipe 230 and the external water path of the water outlet pipe 230. Under the premise of satisfying the miniaturization of the composite filter element, the water paths between the pre-filter element 221 and the post-filter element 222 are prevented from leaking water to each other, thereby ensuring the purity of the filtered water.

[0069] It should be noted that a first annular groove 240c is formed on the groove wall of the first insertion slot 240a, and the first sealing ring is disposed in the first annular groove 240c.

[0070] Considering that the first sealing ring has a certain thickness, in order to ensure good sealing of the water outlet pipe 230, the distance between the water outlet pipe 230 and the groove wall of the first slot 240a is very close. In view of this, it is difficult to directly arrange the first sealing ring between the water outlet pipe 230 and the first slot 240a. In this embodiment, a first annular groove 240c is provided on the groove wall of the first slot 240a, and the first sealing ring is arranged in the first annular groove 240c. In this embodiment, part of the first sealing ring is located in the first annular groove 240c, and another part of the first sealing ring extends out of the first annular groove 240c and abuts against the water outlet pipe 230. In this arrangement, the outer periphery of the water outlet pipe 230 can be better sealed.

[0071] Furthermore, in one embodiment, the first annular groove 240c passes through the lower end surface of the filter element cover 210, and the first annular groove 240c has a first notch 240d on the side facing the post filter element 222, and a first welding piece 231 is also sleeved on the water outlet pipe 230, the first welding piece 231 is connected to the filter element cover 210, and the first welding piece 231 blocks the first notch 240d.

[0072] Specifically, when the first annular groove 240c is formed on the groove wall of the first insertion slot 240a, if the lower end surface of the filter element cover 210 is not penetrated, and the first annular groove 240c is directly formed on the first groove wall, this opening method has a relatively high process difficulty and high cost, so the first annular groove 240c is made to penetrate the lower end surface of the filter element cover 210, and the first annular groove 240c forms a first notch 240d on the side facing the post filter element 222. After the first notch 240d is formed, the first sealing ring is easy to fall off from the first notch 240d, so the first welding piece 231 is also sleeved on the water outlet pipe 230, and the first welding piece 231 is connected to the filter element cover 210, and the first welding piece 231 blocks the first notch 240d to prevent the first sealing ring from falling off from the first notch 240d. The connection method between the first welding piece 231 and the filter element cover 210 can be welding, gluing, or the first welding piece 231 and the filter element cover 210 can be integrally formed in a molten state. The connection method between the first welding piece 231 and the filter element cover 210 is not specifically limited herein.

[0073] Optionally, the first welding sheet 231 is welded to the filter element cover 210. There are many ways to connect the first welding sheet 231 to the filter element cover 210. In this embodiment, the first welding sheet 231 is fixed to the filter element cover 210 by welding. This fixing method has better sealing performance and will not affect its connection strength due to waterway erosion compared to gluing. Therefore, welding is selected for fixing. It should be noted that the first welding sheet 231 and the filter element cover 210 are both made of plastic. In view of this, the specific welding method here is ultrasonic welding, that is, the welding sheet and the filter element cover 210 are welded together by an ultrasonic instrument.

[0074] It should be noted that the upper end cover 250 is sealed and connected to the filter element cover 210, and the upper end cover 250 can move upward and downward relative to the filter element cover 210; the upper end cover 250 is fixedly connected to the filter element, a through hole is opened in the middle of the upper end cover 250, the water outlet pipe 230 extends into the through hole, and the upper end cover 250 is provided with a step portion 250a facing the filter element cover 210; the first welding piece 231 is arranged corresponding to the step portion 250a, and there is a movable space between the first welding piece 231 and the step portion 250a, and the first welding piece 231 is located on the lower side of the step portion 250a, so that when the step portion 250a moves with the upper end cover 250, the first welding piece 231 can limit the step portion 250a.

[0075] It should be noted that when water is continuously injected from the water inlet, the water inside the pre-filter element 221 will become more and more, and then the pulling force of the lower part of the pre-filter element 221 on the upper part of the pre-filter element 221 will become greater and greater. Considering that the upper end cover 250 is movably connected with the filter element cover 210 and the upper end cover 250 is fixedly connected with the filter element, the pre-filter element 221 will drive the upper end cover 250 to move downward. In order to prevent the upper end cover 250 from falling off the filter element cover 210, a step portion 250a is provided on the filter element cover 210, and a first welding piece 231 is provided on the water outlet pipe 230. The first welding piece 231 is fixedly connected with the filter element cover 210 and is located below the step portion 250a, so that when the step portion 250a drops to a certain extent, the step portion 250a will abut the first welding piece 231.

[0076] When the chamber containing the filter element is completely filled with water, the filter element will float upward because of its light material. At this time, the step portion 250a is separated from the first welding sheet 231, and the filter element drives the upper end cover 250 to move upward relative to the filter element cover 210. In view of this, the upper end cover 250 and the filter element can move in this activity space.

[0077] The technical solution of the present invention adopts the method of flexibly connecting the upper end cover 250 with the filter element cover 210 and fixedly connecting the upper end cover 250 with the pre-filter element 221, so that the upper end cover 250 and the filter element can move relative to the filter element cover 210; and a first welding plate 231 is provided for limiting the step portion 250a on the filter element cover 210, and a movable space is provided between the step portion 250a and the first welding plate 231, so that when the lower part of the filter element is subjected to tension, it can slide downward as a whole, thereby preventing it from being deformed or torn due to excessive tension.

[0078] In one embodiment, the first welding sheet 231 includes a welding portion 231 a and a receiving portion 231 b connected to each other, the welding portion 231 a is connected to the water outlet pipe 230 , and the receiving portion 231 b extends to the outside of the outer periphery of the water outlet pipe 230 .

[0079] Specifically, further, the first welding sheet 231 includes a welding portion 231a and a receiving portion 231b connected to each other. In this embodiment, the welding portion 231a and the receiving portion 231b are integrally formed. Of course, it is not limited to this embodiment. The welding portion 231a and the receiving portion 231b can be connected by welding or by gluing. The welding portion 231a is at least connected to the end face of the bottom end of the water outlet pipe 230. The connection method of the welding portion 231a and the water outlet pipe 230 can be welding, gluing, or integrally formed in a molten state, which is not specifically limited here. It is considered that the receiving portion 231b is used to limit the step portion 250a. The receiving portion 231b at least extends to the outside of the outer periphery of the water outlet pipe 230. The receiving portion 231b is set in this way to limit the step portion 250a. A gap is left between the receiving parts 231 b so that water can flow through the first welding sheet 231 , so that the pre-filter element 221 can be balanced when filled with water.

[0080] Based on the above description, the partition 280 includes a connected partition plate 281 and a cylinder, and the partition plate 281 and the cylinder can be connected by welding or melted into one. The cylinder is used to protect the structure of the post filter element 222 to prevent the post filter element 222 from being deformed by water pressure. Considering that the thickness of the partition plate 281 is relatively thin, it is difficult to form a deeper second slot 287a for limiting the outlet pipe 230. In view of this, the partition plate 281 is provided with a protrusion 286 toward the front filter element 221, and the second slot 287a is opened on the protrusion 286.

[0081] It should be noted that a second annular groove 287c is formed on the groove wall of the second insertion slot 287a, and the second sealing ring 287b is disposed in the second annular groove 287c.

[0082] Considering that the second sealing ring 287b has a certain thickness, in order to ensure good sealing of the water outlet pipe 230, the distance between the water outlet pipe 230 and the groove wall of the second slot 287a is very close. In view of this, it is difficult to directly arrange the second sealing ring 287b between the water outlet pipe 230 and the second slot 287a. In this embodiment, a second annular groove 287c is provided on the groove wall of the second slot 287a, and the second sealing ring 287b is arranged in the second annular groove 287c. In this embodiment, part of the second sealing ring 287b is located in the second annular groove 287c, and another part of the second sealing ring 287b extends out of the second annular groove 287c and abuts against the water outlet pipe 230. In this arrangement, the outer periphery of the water outlet pipe 230 can be well sealed.

[0083] Furthermore, the second annular groove 287c passes through the upper end surface of the raised portion 286, and the second annular groove 287c has a second notch 287d on the side facing the upper end cover 250. A second welding plate 232 is also sleeved on the bottom end of the water outlet pipe 230, and the second welding plate 232 is connected to the raised portion 286, and the second welding plate 232 blocks the second notch 287d.

[0084] When the second annular groove 287c is formed on the groove wall of the second insertion slot 287a, if the upper end surface of the protrusion 286 is not penetrated, and the second annular groove 287c is directly formed on the second groove wall, this opening method has a relatively high process difficulty and high cost, so the second annular groove 287c is made to penetrate the upper end surface of the protrusion 286, and the second annular groove 287c forms a second notch 287d on the side facing the upper end cover 250. After the second notch 287d is formed, the second sealing ring 287b is easy to fall off from the second notch 287d. In view of this, the first filter assembly 200 further includes a second welding sheet 232, and the second welding sheet 232 is connected to the filter element cover 210. The second welding sheet 232 is used to block the second notch 287d to prevent the second sealing ring 287b from falling off from the second notch 287d. The second welding piece 232 and the raised portion 286 may be connected by welding, gluing, or integrally formed in a molten state. The connection method between the second welding piece 232 and the raised portion 286 is not specifically limited herein.

[0085] Optionally, the second welding piece 232 is welded to the raised portion 286. There are many ways to connect the second welding piece 232 to the raised portion 286. In this embodiment, the second welding piece 232 and the raised portion 286 are fixed by welding. This fixing method has better sealing performance and will not affect its connection strength due to waterway erosion compared to gluing. Therefore, welding is selected for fixing. It should be noted that the second welding piece 232 and the separator 280 are both made of plastic. In view of this, the specific welding method here is ultrasonic welding, that is, the second welding piece 232 and the filter element cover 210 are welded together by an ultrasonic instrument.

[0086] Based on the above description, the filter element cover 210 is also provided with a plurality of water inlets, including a second water outlet 213; the filter bottle cover 410 is provided with a plurality of water channels, two of which are respectively connected to the second water inlet 413 and the wastewater outlet 415, and the water inlets correspond to the water channels one by one, that is, the number of water channels is greater than or equal to the number of water inlets; and the longitudinal cross-sectional area of ​​the water channel is smaller than the longitudinal cross-sectional area of ​​the water inlet, so that a certain height difference is allowed between the water inlet and the water channel when the first filter component 200 is disassembled or installed; a sealing ring 285 is also provided on the water inlet, and the sealing ring 285 will conflict with the filter bottle cover 410; specifically, since the first filter component 200 can be integrally movable relative to the filter bottle 100, Disassembly, and the water path between the filter bottle cover 410 and the filter element cover 210 needs to be connected, so it is necessary to open a water inlet and a water channel to facilitate the integration of the composite filter element as a whole; and there is a certain range of movement between the filter bottle cover 410 and the filter element cover 210, so a sealing ring 285 is required to provide a seal between the water inlet and the water channel, and the longitudinal cross-sectional area of ​​the water channel is continuously smaller than the water inlet, so that when the filter element cover 210 moves within a certain range, the water inlet and the water channel can still correspond, and when the filter element cover 210 is embedded in the clamping groove 418, the sealing ring 285 will be deformed, the deformation of the sealing ring 285 can match the height difference between the water channel and the water inlet, and the sealing ring 285 can also provide a seal between the water inlet and the water channel when deformed.

[0087] The multiple water outlets include a first water inlet 211, a first water outlet 212 and a second water outlet 213. The first water inlet 211 and the first water outlet 212 respectively introduce raw water (water to be filtered) into the pre-filter 221 and export water filtered by the pre-filter 221. The second water outlet 213 exports water filtered by the post-filter 222, that is, exports purified water. Among the multiple water channels, there is one that is connected to the first water inlet 211, the first water outlet 212, the second water outlet 213, the second water inlet 413 and the reverse osmosis water outlet cavity to form an overall flow path.

[0088] It should be noted that the first filter component 200 provided in this embodiment may include a pre-filter element 221 or may not include the pre-filter element 221; when the pre-filter element 221 is included, the pre-filter element 221 is hollow, and the outlet pipe 230 passes through the pre-filter element 221 and is connected to the second water outlet 213, and a sealing groove 284 is opened on the outer peripheral wall of the top end of the partition 280, and a plurality of sealing rings 285 are arranged in the sealing groove 284 to isolate the water path between the pre-filter element 221 and the post-filter element 222; and when the pre-filter element 221 is not included, the pre-filter element 221 can be directly removed, that is, this embodiment can contain the installation position of the pre-filter element 221.

[0089] Based on the above description, if the pre-filter element 221 is installed, the bottom end of the pre-filter element 221 is arranged on the top end of the partition 280, and the top end of the pre-filter element 221 is connected to the upper end cover 250; specifically, a limiting ring 281a for limiting the pre-filter element 221 is arranged on the top end of the partition 280, and a mounting groove for installing the pre-filter element 221 is formed on the upper end cover 250, and the cooperation of the limiting ring 281a and the mounting groove will limit the pre-filter element 221. The pre-filter element 221 is in the hollow position, and the outlet pipe 230 will pass through the pre-filter element 221; if the pre-filter element 221 is not set, the pre-filter element 221 can be directly removed, or the length of the partition 280 and the post-filter element 222 can be extended so that the partition 280 is connected to the upper end cover 250; the above is only an example, and the installation relationship and matching relationship between the pre-filter element 221 and the post-filter element 222 in the first filter component 200 can be changed according to actual usage requirements.

[0090] It should be noted that when the pre-filter element 221 and the post-filter element 222 are installed at the same time, the partition 280 will separate the pre-filter element 221 and the post-filter element 222 in the central tube 340 to ensure that the water paths of the two are not mixed; specifically, the raw water will enter from the first water inlet 211, be filtered by the pre-filter element 221, pass through the hollow part of the pre-filter element 221, and then be discharged from the first water outlet 212 to form the first purified water, and the first purified water will then enter the filter bottle 100 through the second water inlet 413. The water filtered by the second filter component 300 is the second purified water, which then passes through the first water hole 340a, i.e., the second water hole 280a, into the partition 280, and then is filtered by the post-filter element 222 to form pure water, which then passes through the hollow part of the post-filter element 222, and then through the limiting tube 283 and the water outlet pipe 230 to the second water outlet 213 and is discharged from the filter bottle 100; the pure water discharged from the filter bottle 100 is provided for users.

[0091] When only the pre-filter 221 is installed, the raw water will also be filtered through the pre-filter 221 to form the first clean water, and then the first clean water will be filtered through the second filter assembly 300 to form the second clean water, and the second clean water will directly enter the partition 280 and then be discharged through the outlet pipe 230 and the second outlet port 213; or the pre-filter 221 is installed as a whole in the central tube 340, the installation position of the post-filter 222 is cancelled, and an additional second clean water outlet is opened to discharge the second clean water.

[0092] When only the post-filter element 222 is installed, the water entering the second filter assembly 300 still needs to be filtered by the pre-filter element 221 first; the post-filter element 222 can also be installed as a whole in the central tube 340, and the installation position of the pre-filter element 221 can be cancelled. If the installation position of the pre-filter element 221 is cancelled, the setting of the partition 280 can also be cancelled. After the setting of the partition 280 is cancelled, the setting of the water outlet pipe 230 can be cancelled, and the second water outlet 213 and the first water outlet 212 can be combined; and the second clean water filtered by the second filter assembly 300 still passes through the first water hole 340a or the first water hole 340a and the second water hole 280a and then is filtered through the post-filter element 222, and then discharged from the filter bottle 100.

[0093] In order to facilitate the user to replace the filter bottle 100 equipped with the reverse osmosis filter element 310 or the first filter component 200 including the pre-filter element 221 and / or the post-filter element 222 respectively, a filter bottle 100 handle is provided on the filter bottle cover 410, and a filter element handle 270 is provided on the first filter component 200; therefore, when the user needs to replace the filter bottle 100 or the first filter component 200 respectively, the first filter component 200 can be taken out of the filter bottle 100, and the filter bottle 100 can also be taken out of the water purification equipment, thereby facilitating the user to replace the reverse osmosis filter element 310 and the pre-filter element 221 and / or the post-filter element 222.

[0094] Specifically, the shape of the filter element handle 270 is similar to a U-shape, and adapter posts 270a are provided at both ends of the filter element handle 270, and adapter grooves 214 are opened on the opposite sides of the filter element cover 210, and the adapter posts 270a are rotatably connected in the adapter grooves 214; thus, the filter element handle 270 can be rotated up and down, so that the filter element handle 270 can be placed on the filter element cover 210 for storage when not in use, thereby reducing the overall space occupied by the filter element cover 210; it should be noted that in order to ensure the structural strength of the filter element handle 270, the filter element handle 270 can be manufactured using an integrated molding process.

[0095] The adapter groove 214 is a waist-shaped groove, that is, the two ends of the adapter groove 214 are arc-shaped, and the extension direction of the adapter groove 214 intersects with the height direction of the filter bottle 100; further, the length of the adapter groove 214 is greater than twice the diameter of the bottom surface of the adapter column 270a, and the extension direction of the adapter groove 214 is perpendicular to the axial direction of the composite filter element; further, the extension direction of the adapter groove 214 can be parallel to the horizontal plane; the setting of the adapter groove 214 allows the adapter column 270a to slide in the adapter groove 214, so that when the user places the first filter component 200 in the central tube 340, the filter element handle 270 can be rotated to be parallel to a certain cross-section of the filter element cover 210 and then slide to reduce the gap between the filter element handle 270 and the filter element cover 210 , thereby reducing the space occupied by the filter element handle 270; and when the first filter component 200 needs to be lifted out of the central tube 340, the filter element handle 270 can be slid first to increase the gap between the filter element handle 270 and the filter element cover 210, and then the filter element handle 270 can be rotated to a position suitable for the user to exert force to lift the first filter component 200; in summary, the rotating and slidable setting of the filter element handle 270 makes the space occupied by the filter element handle 270 when the first filter component 200 is installed in the central tube 340 smaller, which facilitates the overall integration and compounding of the filter element; and when the first filter component 200 needs to be lifted out of the central tube 340, the filter element handle 270 can facilitate the user to lift out the first filter component 200, thereby improving the convenience during use.

[0096] Specifically, in order to limit the rotation of the filter element handle 270 when it is stored, a limiting structure 410b is provided on the filter bottle cover 410. In this embodiment, the limiting structure 410b is specifically a limiting portion 410b1 protruding from the clamping groove 418, and a sliding portion 270b is provided on both ends of the filter element handle 270. The length direction of the sliding portion 270b is parallel to the length direction of the adapter groove 214, and the adapter column 270a is provided on the sliding portion 270b; in addition, a recessed portion 410b is formed on the sliding portion 270b to be parallel to the length direction of the adapter groove 214. The limit portion 410b1 is matched with the recessed portion 270b1, and the length of the limiting portion 410b1 is less than the length of the adapter groove 214; the limiting portion 410b1 will limit the rotation of the filter element handle 270 in the storage state, and the filter element handle 270 can release the restriction of its rotation state by the limiting portion 410b1 through sliding; the sliding portion 270b will cooperate with the filter element cover 210 to further limit the sliding direction of the filter element handle 270 and reduce the distance between the filter element handle 270 and the filter element cover 210, so that the filter element handle 270 is not easy to shake left and right.

[0097] Furthermore, two limiting portions 410b1 are symmetrically arranged on the filter bottle cover 410, and recessed portions 270b1 are arranged on both ends of the filter element handle 270; more specifically, the limiting portion 410b1 is an L-shaped plate 410b2, and the recessed portion 270b1 is an L-shaped groove 270b2. The L-shaped plate 410b2 as a whole is matched with the L-shaped groove 270b2, and the filter element handle 270 can release the matching between the L-shaped plate 410b2 and the L-shaped groove 270b2 by sliding; similarly, the filter element handle 270 can also make the L-shaped plate 410b2 and the L-shaped groove 270b2 match by sliding; one end of the L-shaped plate 410b2 extends toward the top of the clamping groove 418, so that when the L-shaped plate 410b2 and the L-shaped groove 270b2 are matched, the rotation of the filter element handle 270 will be limited.

[0098] It should be noted that the limiting portion 410b1 and the recessed portion 270b1 may adopt other shapes that can limit the filter element handle 270 from rotating upward in the storage state. This embodiment is only used as an example.

[0099] In order to facilitate the user to slide the filter cartridge handle 270 when it is in the storage state to release the rotation restriction, an arc-shaped groove 270c is formed on the top of the filter cartridge cover 210, and an arc-shaped notch 270d is opened on the side wall of the arc-shaped groove 270c close to the filter cartridge handle 270; the setting of the arc-shaped groove 270c and the arc-shaped notch 270d allows the user to insert his finger into the arc-shaped groove 270c, and then apply force to the filter cartridge handle 270 through the arc-shaped notch 270d, thereby facilitating the user to slide the filter cartridge handle 270 to release its rotation restriction, and further facilitating the user to take out the first filter component 200.

[0100] Correspondingly, in order to facilitate the user to lift the filter bottle 100 from the water purification equipment, a filter bottle 100 handle is provided on the filter bottle cover 410; the filter bottle 100 handle is rotatably connected to the filter bottle cover 410; specifically, connecting columns 420a are provided on both ends of the filter bottle 100 handle, and the filter bottle cover 410 is provided with a connecting groove 417 into which the connecting column 420a extends, and the connecting column 420a is rotatably connected in the connecting groove 417; the provision of the filter bottle 100 handle will facilitate the user to lift the filter bottle 100 from the water purification equipment, thereby facilitating the user to replace the reverse osmosis filter element 310.

[0101] Specifically, since the filter bottle 100 is heavy, in order to improve the stability between the handle of the filter bottle 100 and the filter bottle cover 410 when the filter bottle 100 is lifted up and improve the user experience, a lug 420a1 is provided on the side wall of the portion of the connecting column 420a that extends into the connecting groove 417, and a lug 420a1 groove 417a is provided on the filter bottle cover 410 for the lug 420a1 to be inserted into. When the handle of the filter bottle 100 is rotated to lift the filter bottle 100, the lug 420a1 will be inserted into the lug 420a1 groove 417a, so that the cooperation of the lug 420a1 and the lug 420a1 groove 417a reduces the possibility of the filter bottle 100 shaking when it is lifted up, making it easier to use. The lifting process of the filter bottle 100 is more stable, which is convenient for the user to exert force, thereby improving the user experience; it should be noted that the lug 420a1 groove 417a is connected to the connecting groove 417, and when the handle of the filter bottle 100 is not subject to the gravity of the filter bottle 100, the lug 420a1 can rotate unimpeded in the connecting groove 417 and the lug 420a1 groove 417a within the rotatable range of the handle of the filter bottle 100; when the handle of the filter bottle 100 is subject to the gravity of the filter bottle 100, the lug 420a1 rotates until its length direction is parallel to the axial direction of the composite filter element and is inserted into the lug 420a1 groove 417a, thereby limiting the shaking of the filter bottle 100.

[0102] It should also be noted that in order to reduce the space occupied by the filter bottle 100 including the first filter component 200 as a whole in the water purification equipment, the filter element handle 270 and the filter bottle 100 handle are located on the same side of the filter bottle 100; more preferably, the filter bottle 100 handle and the filter element handle 270 are both U-shaped, semicircular or U-shaped symmetrical shapes to facilitate the rotation of the two; in addition, the symmetry axes of the two are parallel and both intersect with the axis of the composite filter element, and the size of the filter element handle 270 is smaller than the handle of the filter bottle 100, so that the filter element handle 270 and the filter bottle 100 handle can reduce the space occupied by the filter bottle 100 as a whole in the water purification equipment, and further improve the overall integration of the composite filter element.

[0103] In order to further reduce the space occupied by the filter element handle 270 and the filter bottle 100 handle while ensuring the structural strength of the two, the filter bottle 100 handle and the filter element handle 270 are both integrally formed; in addition, in order to further reduce the space occupied by the filter bottle 100 handle, the filter bottle 100 handle is configured as a strip; and a reinforcing rib 420b is integrally formed on the side of the filter bottle 100 handle away from the filter bottle 100, and the outer arc edge of the reinforcing rib 420b has a smooth transition with the filter bottle 100 handle. The reinforcing rib 420b increases the thickness of the filter bottle 100 handle and improves the structural strength of the filter bottle 100 handle. When the filter bottle 100 needs to be lifted out, the user can use the reinforcing rib 420b to apply force to the filter bottle 100 handle, thereby causing the filter bottle 100 handle to rotate.

[0104] It should be noted that when the pre-filter element 221 and the post-filter element 222 are installed at the same time, the partition 280 will separate the pre-filter element 221 and the post-filter element 222 in the central tube 340 to ensure that the water paths of the two are not mixed; specifically, the raw water will enter from the first water inlet 211, be filtered by the pre-filter element 221, pass through the hollow part of the pre-filter element 221, and then be discharged from the first water outlet 212 to form the first purified water, and the first purified water will then enter the filter bottle 100 through the reverse osmosis water inlet cavity. The second filter assembly 300 filters the water, which is the second purified water. The second purified water then passes through the first water hole 340a, i.e., the second water hole 280a, and enters the partition 280. The second purified water is then filtered by the post-filter element 222 to form pure water. The pure water then passes through the hollow portion of the post-filter element 222, and then through the limiting tube 283 and the outlet pipe 230 to the second outlet port 213 and is discharged from the filter bottle 100. The pure water discharged from the filter bottle 100 is provided to the user.

[0105] When only the pre-filter 221 is installed, the raw water will also be filtered through the pre-filter 221 to form the first clean water, and then the first clean water will be filtered through the second filter assembly 300 to form the second clean water, and the second clean water will directly enter the partition 280 and then be discharged through the outlet pipe 230 and the second outlet port 213; or the pre-filter 221 is installed as a whole in the central tube 340, the installation position of the post-filter 222 is cancelled, and an additional second clean water outlet is opened to discharge the second clean water.

[0106] When only the post-filter element 222 is installed, the water entering the second filter assembly 300 still needs to be filtered by the pre-filter element 221 first; the post-filter element 222 can also be installed as a whole in the central tube 340, and the installation position of the pre-filter element 221 can be cancelled. If the installation position of the pre-filter element 221 is cancelled, the setting of the partition 280 can also be cancelled. After the setting of the partition 280 is cancelled, the setting of the water outlet pipe 230 can be cancelled, and the second water outlet 213 and the first water outlet 212 can be combined; and the second clean water filtered by the second filter assembly 300 still passes through the first water hole 340a or the first water hole 340a and the second water hole 280a and then is filtered through the post-filter element 222, and then discharged from the filter bottle 100.

[0107] The water flow path arrangement of the composite filter element provided by the present invention is described below in combination with the above-mentioned components.

[0108] Taking the first filter assembly 200 including the pre-filter element 221 and the post-filter element 222 as an example, in this embodiment, the pre-filter element 221 is hollowed to form a first water outlet cavity, and a first water gap 610 is formed between the central tube 340 and the pre-filter element 221. After the water flows into the first water gap 610, it will flow through the pre-filter element 221 under its own pressure and enter the first water outlet cavity, and then the water flows out to form the first clean water, thereby completing the filtering process of the pre-filter element 221;

[0109] A second water gap 620 is formed between the reverse osmosis filter element 310 and the filter bottle 100. The first clean water filtered by the pre-filter element 221 will flow through the booster pump for boosting, thereby increasing the pressure of the water flow, and then the first clean water enters the second water gap 620; the water flow in the second water gap 620 will pass through the reverse osmosis filter element 310 under pressure, so that the reverse osmosis filter element 310 can filter out soluble impurities such as metal ions in the water; a reverse osmosis wastewater cavity is opened on the filter bottle cover 410, and the reverse osmosis wastewater cavity is communicated with the installation space between the filter bottle 100 and the central tube 340; the reverse osmosis filter element 310 and the central tube 340 are connected. The tube 340 fits tightly, so that after the water flows into the reverse osmosis filter element 310, only a part of the water will pass through the reverse osmosis filter element 310 under the action of pressure, while the remaining part of the water flow cannot completely pass through the reverse osmosis filter element 310 and passes through the reverse osmosis top cover 320 and then is discharged from the filter bottle 100 through the reverse osmosis waste water cavity; reverse osmosis filtration is based on the different rates at which solutes such as salt ions and water molecules pass through the reverse osmosis filter membrane to separate solutes in water, so that the water that does not pass through the reverse osmosis filter element 310 and enters the reverse osmosis waste water cavity will take away most of the impurity solutes such as salt ions, thereby ensuring the overall filtering effect of the second filter component 300.

[0110] In addition, a first water through hole 340a is provided on the central tube 340, and a second water through hole 280a is provided on the partition 280. The second water through hole 280a is communicated with the first water through hole 340a. The first water through hole 340a is adjacent to the reverse osmosis filter element 310. The first purified water passing through the reverse osmosis filter element 310 will be formed into second purified water. The second purified water will enter the partition 280 through the first water through hole 340a and the second water through hole 280a.

[0111] The second purified water entering the partition 280 will flow through the post-filter element 222 under pressure. The post-filter element 222 is also hollow, and the cavity of the post-filter element 222 forms a second filter cavity 720. The second filter cavity 720 is connected to the limiting tube 283, so that the second purified water will enter the second filter cavity 720 after passing through the post-filter element 222, and then be discharged through the limiting tube 283 and the outlet pipe 230.

[0112] Specifically, the filter bottle cover 410 is provided with a first water inlet 411, a second water inlet 413, a first water outlet 412, a second water outlet 414 and a wastewater outlet 415; and the first water inlet 411, the second water inlet 413, the first water outlet 412, the second water outlet 414 and the wastewater outlet 415 are arranged in parallel on the filter bottle cover 410 and each is connected with the filter element cover 210 or the installation space through a water channel; wherein, the first water inlet 411 is connected with the first water flow gap 610, the second water inlet 413 is connected with the second water flow gap 620, the first water outlet 412 is connected with the first water outlet cavity, the second water outlet 414 is connected with the water outlet pipe 230, and the wastewater outlet 415 is connected with the installation space.

[0113] The filter element cover 210 includes a first water inlet 211, a first water outlet 212 and a second water outlet 213. The first water inlet 211 is connected to the first water inlet 411 and the first water gap 610 respectively, the first water outlet 212 is connected to the first water outlet 412 and the first water outlet cavity respectively, and the second water outlet 213 is connected to the second water outlet 414 and the water outlet channel respectively.

[0114] In actual use, raw water (unfiltered water, such as tap water) enters the first water inlet 211 through the first water inlet 411, is filtered by the pre-filter element 221, and then is discharged from the first water outlet 412 through the first water outlet 212 to form the first purified water; the first purified water is pressurized, and then enters the second water gap 620 through the second water inlet 413, and part of the first purified water is filtered by the reverse osmosis filter element 310 to form the second purified water, and the remaining part The first purified water is discharged from the filter element through the wastewater outlet 415; the second purified water enters the partition 280 through the first water hole 340a and the second water hole 280a. The post filter element 222 in the partition 280 will filter the second purified water to form pure water. The post filter element 222 is hollow. The pure water enters the hollow part of the post filter element 222 and then passes through the water outlet pipe 230 to the second water outlet 213, and then is discharged from the filter bottle 100 through the second water outlet 414.

[0115] 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 for water purification equipment, characterized in that: include: Filter bottle; A central tube, the central tube being disposed in the filter bottle; a first filter assembly, the first filter assembly being detachably disposed in the central tube; A second filter assembly, wherein an installation space is formed between the inner wall of the filter bottle and the outer wall of the central tube, and the second filter assembly is disposed in the installation space; Wherein, the first filter assembly includes a pre-filter element, a partition and a post-filter element, the partition is connected to the bottom end of the pre-filter element, the post-filter element is arranged in the partition, and the partition separates the pre-filter element and the post-filter element.

2. The composite filter element of the water purification equipment according to claim 1, characterized in that: The partition comprises a partition plate and a cylinder, the bottom end of the pre-filter is connected to one side of the partition plate, the top end of the cylinder is connected to the other side of the partition plate, and the post-filter is arranged in the cylinder.

3. The composite filter element of the water purification equipment according to claim 2, characterized in that: The top end of the pre-filter element is connected with an upper end cover, the upper end cover is connected with a filter element cover, and the filter element cover is provided with a filter element handle.

4. The composite filter element of the water purification equipment according to claim 3, characterized in that: The filter bottle is sealedly connected with a filter bottle cover, the filter bottle cover is provided with a filter bottle handle, and the filter bottle cover is provided with a clamping groove for the filter element cover to be embedded.

5. The composite filter element of the water purification equipment according to claim 4, characterized in that: The filter element cover is provided with a plurality of water inlets, the filter bottle cover is provided with a plurality of water channels, and the water inlets are connected to the water channels in a one-to-one correspondence.

6. The composite filter element of the water purification equipment according to claim 5, characterized in that: The longitudinal cross-sectional area of ​​the water channel is smaller than the longitudinal cross-sectional area of ​​the water outlet.

7. The composite filter element of the water purification equipment according to claim 6, characterized in that: A flexible abutment is provided on the water inlet, and the flexible abutment is in abutment with the top cover of the filter bottle.

8. The composite filter element of the water purification equipment according to claim 5, characterized in that: The partition plate is provided with a water outlet pipe, and the water outlet pipe passes through the pre-filter element and is connected with one of the plurality of water outlets.

9. The composite filter element of the water purification equipment according to claim 8, characterized in that: The water outlet pipe is sealed and connected to the filter element cover. A first welding piece is arranged on the top end of the water outlet pipe. The first welding piece is fixedly connected to the filter element cover.

10. The composite filter element of the water purification equipment according to claim 5, characterized in that: 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 arranged between the inner wall of the filter bottle and the outer cylinder, the reverse osmosis top cover is arranged on the top of the reverse osmosis filter element, and the reverse osmosis bottom cover is arranged on the bottom of the reverse osmosis filter element.

11. The composite filter element of the water purification equipment according to claim 10, characterized in that: The reverse osmosis top cover is provided with a through opening for the outer cylinder to extend out.

12. The composite filter element of the water purification equipment according to claim 10, characterized in that: The central tube is provided with a plurality of first water holes, and the cylinder body is provided with a plurality of second water holes.

13. The composite filter element of the water purification equipment according to claim 10, characterized in that: The upper end cover is sealed to the filter element cover, and the reverse osmosis top cover is sealed to the filter bottle cover.

14. The composite filter element of the water purification equipment according to claim 10, characterized in that: The water port includes a first water inlet, a first water outlet and a second water outlet. The first water inlet is used to introduce water into the pre-filter element, the first water outlet is used to discharge water filtered by the pre-filter element, and the second water outlet is connected to the water outlet pipe.

15. The composite filter element of the water purification equipment according to claim 14, characterized in that: The filter bottle cover is provided with a first water inlet, a second water inlet, a first water outlet, a second water outlet and a waste water outlet; Among them, the first water inlet is communicated with the first water inlet through a water channel, the first water outlet is communicated with the first water outlet through a water channel, the second water outlet is communicated with the second water outlet through a water channel, and the second water inlet and the wastewater outlet are respectively communicated with the installation space through a water channel.

Images