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 front filter element is arranged in the central pipe, the front filter element is hollow to form a first water outlet cavity, and a first water passing gap is formed between the front filter element and the central pipe; a mounting space is formed between the inner wall of the filter bottle and the outer wall of the central pipe, the reverse osmosis filter element is arranged in the mounting space, and a second water passing gap is formed between the reverse osmosis filter element and the filter bottle; the bottom end of the front filter element is connected with a separator, the rear filter element is arranged in the separator, the separator is communicated with a water outlet pipe, a plurality of first water passing holes are formed in the central pipe, and a plurality of second water passing holes are formed in the separator; according to the technical scheme, a novel flow path of the composite filter element is provided.

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] In order to fully utilize the service life of the reverse osmosis filter element, the pre-filter element and the post-filter element need to be removable compared to the reverse osmosis filter element, so a new composite filter element flow path needs to be designed. Summary of the invention

[0005] The main purpose of the present invention is to provide a composite filter element for water purification equipment, aiming to provide a flow path of the composite filter element with a detachable front filter element and a detachable rear filter element.

[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 pre-filter element, wherein the pre-filter element is detachably disposed in the central tube, the pre-filter element is hollow to form a first water outlet cavity, and a first water-passing gap is formed between the pre-filter element and the central tube;

[0010] A reverse osmosis filter element, wherein an installation space is formed between the inner wall of the filter bottle and the outer wall of the central tube, the reverse osmosis filter element is arranged in the installation space, and a second water-passing gap is formed between the reverse osmosis filter element and the filter bottle;

[0011] The rear filter element, the bottom end of the front filter element is fixedly connected with a partition, the rear filter element is arranged in the partition, the partition is connected with a water outlet pipe, the central pipe is provided with a plurality of first water holes, and the partition is provided with a plurality of second water holes.

[0012] Optionally / in one embodiment, raw water enters the first water flow gap after entering the filter bottle, is filtered by the pre-filter element, and is discharged from the filter bottle through the first water outlet cavity to form first clean water. The first clean water is pressurized by the water purification equipment and enters the second water flow gap in the filter bottle again, is filtered by the reverse osmosis filter element to form second clean water. The second clean water enters the partition through the first water flow hole and the second water flow hole. The post-filter element filters the second clean water entering the partition, and then discharges the filter bottle through the water outlet pipe.

[0013] Optionally / in one embodiment, the partition comprises a partition plate and a barrel, the front filter element is arranged on the top surface of the partition plate, the barrel body is arranged on the bottom surface of the partition plate, and the rear filter element is arranged in the barrel body.

[0014] Optionally / in one embodiment, the water outlet pipe is arranged on the partition plate, and the water outlet pipe passes through the first water outlet cavity and then discharges water through the top of the filter bottle.

[0015] Optionally / in one embodiment, a limiting tube is formed on the bottom surface of the partition plate and protrudes into the cylinder body. The limiting tube is used to limit the post-filter element, and the limiting tube is connected to the water outlet pipe.

[0016] Optionally / in one embodiment, a lower end cover is provided at the bottom of the partition, and an embedding portion protruding into the barrel body is provided on the outer periphery of the lower end cover, and the lower end cover is embedded in the barrel body and is used to fix the post-filter element.

[0017] Optionally / in one embodiment, the lower end cover protrudes into the cylinder body to form a limiting protrusion, and the limiting protrusion and the embedded portion jointly limit the post-filter element.

[0018] Optionally / in one embodiment, a sealing groove is provided on the top of the barrel, and a plurality of sealing strips are arranged in the sealing groove.

[0019] Optionally / in one embodiment, it is characterized in that a filter bottle cover is provided on the filter bottle, the filter bottle cover is used to seal the filter bottle, and 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 wastewater outlet;

[0020] Among them, the first water inlet is connected to the first water flow gap, the second water inlet is connected to the second water flow gap, the first water outlet is connected to the first water outlet cavity, and the second water outlet is connected to the water outlet pipe.

[0021] Optionally / in one embodiment, the first water inlet, the second water inlet, the first water outlet, the second water outlet and the wastewater outlet are arranged in parallel on the filter bottle cover.

[0022] Optionally / in one embodiment, an upper end cover is provided on the top of the pre-filter element, a filter element cover is provided on the upper end cover, the filter element cover is sealed and connected to the upper end cover, a first water inlet, a first water outlet and a second water outlet are provided on the filter element cover, the first water inlet is respectively connected with the first water inlet and the first water gap, the first water outlet is respectively connected with the first water outlet and the first water outlet cavity, and the second water outlet is respectively connected with the second water outlet and the water outlet pipe.

[0023] Optionally / in one embodiment, both ends of the water outlet pipe are respectively connected to the filter element cover and the partition.

[0024] Optionally / in one embodiment, a filter element handle is provided on the filter element cover, and a filter bottle handle is provided on the filter bottle cover.

[0025] The technical solution of the present invention forms a new flow path of the composite filter element by arranging a first water flow gap, a first water outlet chamber, a second water flow gap, a first water flow hole, a second water flow hole and a water outlet pipe, thereby meeting the requirement that the pre-filter element and the post-filter element are detachable compared to the reverse osmosis filter element, thereby 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

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the overall structure of the composite filter element of the water purification device of the present invention;

[0028] Figure 2 An exploded view of the overall structure of the composite filter element of the water purification device of the present invention;

[0029] Figure 3 for Figure 2 A magnified view of part A;

[0030] Figure 4 It is the overall structural schematic diagram of the filter bottle cover;

[0031] Figure 5It is an exploded view of the overall structure of the second filter assembly;

[0032] Figure 6 It is a cross-sectional schematic diagram of a composite filter element of a water purification device of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of part B;

[0034] Figure 8 for Figure 6 Enlarged view of part C;

[0035] Fig. 9 It is a schematic diagram of the overall flow path of the composite filter element of the water purification equipment of the present invention.

[0036] Description of Figure Numbers:

[0037] Label name Label name 100 Filter bottle 300 Second filter element 200 First filter component 310 Reverse Osmosis Filter 210 Filter cover 320 Reverse osmosis cover 211 First water inlet 321 Port 212 First water outlet 330 Reverse osmosis bottom cover 213 The second water outlet 340 Center tube 221 Pre-filter 340a The first water hole 222 Post filter 350 Reverse osmosis filter tank 230 Outlet pipe 410 Filter bottle cap 250 Upper cover 411 First water inlet 260 Lower end cover 412 First water outlet 261 Limiting protrusion 413 Second water inlet 270 Filter handle 414 Second water outlet 280 Separators 415 Wastewater outlet 280a The second water hole 418 Card slot 281 Divider 420 Filter bottle handle 281a Limiting ring 500 Flexible contact piece 282 Body 610 The first water gap 283 Limiting tube 620 The second water gap 284 Seal groove 710 First filter chamber 285 Sealing ring 720 Second filter chamber

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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 pre-filter element 221 and / or the post-filter element 222 need to be replaced when the service life of the pre-filter element 221 and / or the post-filter element 222 reaches the end of the service life, and further, 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.

[0043] 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.

[0044] 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.

[0045] The first filter assembly 200 is arranged in the central tube 340; specifically, the central tube 340 is used to provide a storage space for the first filter assembly 200; the central tube 340 will separate the second filter assembly 300 from the first filter assembly 200, so that the two complement each other; 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.

[0046] It should be noted that a reverse osmosis wastewater cavity is provided 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 fits tightly 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 reverse osmosis wastewater cavity; 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 reverse osmosis wastewater 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.

[0047] In this embodiment, the first filter assembly 200 includes a pre-filter element 221 and a post-filter element 222. The top of the pre-filter element 221 is connected with a filter element cover 210. The filter bottle cover 410 is provided with a filter element cover 210 slot for inserting the filter element cover 210. The arrangement of the filter element cover 210 slot 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. This facilitates the disassembly of the first filter assembly 200. The filter bottle cover 410 is provided with a reverse osmosis water inlet cavity, 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. Water flows into the filter bottle 100 through the reverse osmosis water inlet cavity, 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.

[0048] Accordingly, 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.

[0049] 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 front filter element 221 and the rear filter element 222 are arranged in the central tube 340, the upper end cover 250 is connected to the top end of the front filter element 221, 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.

[0050] It should be noted that the first filter component 200 may include only the pre-filter element 221, only the post-filter element 222, or both the pre-filter element 221 and the post-filter element 222; specifically, the pre-filter element 221 may be disposed between the upper end cover 250 and the post-filter element 222, the pre-filter element 221 may also be disposed between the lower end cover 260 and the post-filter element 222, the pre-filter element 221 may also be disposed in parallel with the post-filter element 222 between the upper end cover 250 and the lower end cover 260, or the post-filter element 222 may be replaced as a whole with the pre-filter element 221, the specific positions of the pre-filter element 221 and the post-filter element 222 may be designed according to actual usage requirements, and this is not limited in this embodiment.

[0051] However, it needs to be further explained that when there is only a pre-filter element 221, the upper end cover 250 and the lower end cover 260 are directly arranged at the top and bottom ends of the pre-filter element 221; when there is only a post-filter element 222, the upper end cover 250 and the lower end cover 260 are directly arranged at the top and bottom ends of the post-filter element 222.

[0052] When the front filter element 221 and the rear filter element 222 exist at the same time, the front filter element 221 is placed on top and the rear filter element 222 is placed on the bottom. The front filter element 221 is hollow, and a separator 280 is connected to the bottom of the front filter element 221. The rear filter element 222 is arranged in the separator 280. A water outlet pipe 230 for discharging pure water is provided at the top of the separator 280. The separator 280 is connected to the upper end cover 250 through the water outlet pipe 230. A plurality of second water holes 280a are provided on the separator 280. When the water is filtered by the reverse osmosis filter element 310, it can pass through the first water hole 340a and the second water hole 280a. After entering the partition 280, the water will flow through the post-filter element 222 and be filtered. Before the water flows through the reverse osmosis filter element 310, that is, after the water flows through 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. After passing through the reverse osmosis filter element 310, the water still has a high pressure, and the central tube 340 will block part of the water pressure. However, 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, and further improve the structural stability and service life of the post-filter element 222.

[0053] 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 during installation, 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 protrusion 261, and the limiting protrusion 261 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 protrusion 261, 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.

[0054] 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, and the second water outlet 213 is connected to the water outlet pipe 230; the filter bottle cover 410 is provided with a plurality of water channels, two of which are respectively connected to the reverse osmosis water inlet chamber and the reverse osmosis waste water chamber, 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 flexible resistance member 500 is also provided on the water inlet, and the flexible resistance member 500 will conflict with the filter bottle cover 410; specifically, since the first filter component 200 is relative to the filter bottle 100 is detachable as a whole, and the water channel 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, because the flexible resistance member 500 is needed 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 groove of the filter element cover 210, the flexible resistance member 500 will be deformed, and the deformation of the flexible resistance member 500 can match the height difference between the water channel and the water inlet, and the flexible resistance member 500 can also provide a seal between the water inlet and the water channel when deformed.

[0055] 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) through the pre-filter 221 and export water filtered by the pre-filter 221, and 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 reverse osmosis water inlet chamber and the reverse osmosis water outlet chamber to form an overall flow path.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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;

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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 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.

[0067] 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. The second water outlet 213 is connected to the second water outlet 414 and the water outlet pipe 230 respectively.

[0068] 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.

[0069] 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 pre-filter element, wherein the pre-filter element is detachably disposed in the central tube, the pre-filter element is hollow to form a first water outlet cavity, and a first water-passing gap is formed between the pre-filter element and the central tube; A reverse osmosis filter element, wherein an installation space is formed between the inner wall of the filter bottle and the outer wall of the central tube, the reverse osmosis filter element is arranged in the installation space, and a second water-passing gap is formed between the reverse osmosis filter element and the filter bottle; The rear filter element, the bottom end of the front filter element is fixedly connected with a partition, the rear filter element is arranged in the partition, the partition is connected with a water outlet pipe, the central pipe is provided with a plurality of first water holes, and the partition is provided with a plurality of second water holes.

2. The composite filter element of the water purification equipment according to claim 1, characterized in that: in, After the raw water enters the filter bottle, it enters the first water flow gap, is filtered by the pre-filter element, and is discharged from the filter bottle through the first water outlet cavity to form the first clean water. The first clean water is pressurized by the water purification equipment and enters the second water flow gap in the filter bottle again, is filtered by the reverse osmosis filter element, and forms the second clean water. The second clean water enters the partition through the first water flow hole and the second water flow hole. The post-filter element filters the second clean water entering the partition, and then discharges the filter bottle through the outlet pipe.

3. The composite filter element of the water purification equipment according to claim 2, characterized in that: The partition comprises a partition plate and a barrel body, the front filter element is arranged on the top surface of the partition plate, the barrel body is arranged on the bottom surface of the partition plate, and the rear filter element is arranged in the barrel body.

4. The composite filter element of the water purification equipment according to claim 3, characterized in that: The water outlet pipe is arranged on the partition plate, and the water outlet pipe passes through the first water outlet cavity and then drains water through the top of the filter bottle.

5. The composite filter element of the water purification equipment according to claim 4, characterized in that: A limiting tube is formed on the bottom surface of the partition plate and protrudes into the cylinder body. The limiting tube is used to limit the post-filter element, and the limiting tube is connected to the water outlet pipe.

6. The composite filter element of the water purification equipment according to claim 5, characterized in that: A lower end cover is arranged at the bottom of the partition, and an embedding portion protruding into the cylinder body is arranged on the outer periphery of the lower end cover. The lower end cover is embedded in the cylinder body and is used to fix the post-filter element.

7. The composite filter element of the water purification equipment according to claim 6, characterized in that: The lower end cover protrudes into the cylinder body to form a limiting protrusion, and the limiting protrusion and the embedded portion jointly limit the post-filter element.

8. The composite filter element of the water purification equipment according to claim 3, characterized in that: A sealing groove is provided on the top of the cylinder body, and a plurality of sealing strips are arranged in the sealing groove.

9. The composite filter element of the water purification equipment as claimed in any one of claims 2 to 8, characterized in that: The filter bottle is provided with a filter bottle cover, the filter bottle cover is used to seal the filter bottle, and 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 wastewater outlet (415); Among them, the first water inlet is connected to the first water flow gap, the second water inlet is connected to the second water flow gap, the first water outlet is connected to the first water outlet cavity, and the second water outlet is connected to the water outlet pipe.

10. The composite filter element of the water purification equipment according to claim 9, characterized in that: The first water inlet, the second water inlet, the first water outlet, the second water outlet and the wastewater outlet (415) are arranged in parallel on the filter bottle cover.

11. The composite filter element of the water purification equipment according to claim 10, characterized in that: An upper end cover is arranged on the top of the pre-filter element, and a filter element cover, a first water outlet and a second water outlet are arranged on the upper end cover, the first water inlet is respectively connected with the first water inlet and the first water gap, the first water outlet is respectively connected with the first water outlet and the first water outlet cavity, and the second water outlet is respectively connected with the second water outlet and the water outlet pipe.

12. The composite filter element of the water purification equipment according to claim 11, characterized in that: The two ends of the water outlet pipe are respectively connected to the filter element cover and the partition.

13. The composite filter element of the water purification equipment according to claim 11, characterized in that: The filter element cover is provided with a filter element handle, and the filter bottle cover is provided with a filter bottle handle.

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