Pre-filter and water system

Abstract

The utility model discloses a pre-filter and a water consumption system, and relates to the technical field of filters. Wherein the pre-filter comprises a valve head, a filter bottle, a filter assembly, an outer framework and an impeller assembly, the outer framework is rotatably arranged outside the filter assembly in a sleeving manner, and the impeller assembly comprises a mounting seat fixedly mounted in the water filtering cavity and an impeller body rotatably mounted on the mounting seat; the impeller body and the outer framework are coaxially connected and fixed in the circumferential direction, and the mounting base comprises a first water inlet formed in one axial side, a second water inlet formed in the circumferential side and a water outlet formed in the other axial side. The technical scheme provided by the utility model has the technical effects that the filtering effect of the filtering assembly is ensured, and the service life of the pre-filter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a pre-filter and a water use system. Background Art

[0002] As people's living standards continue to improve, their demands for daily water use are also increasing. Due to long-term disrepair and aging of tap water pipes, the water contains a large amount of large particles harmful to the human body, such as mud, rust, and bloodworms, which seriously affect the health of residents. Therefore, a pre-filter is provided, which is equipped with a filter assembly and other components to filter out large particles before the tap water is used. However, while the pre-filter is filtering the water, impurities will adhere to the water filter cavity, especially the surface of the filter assembly. Over time, this will clog the filter assembly and reduce the filtering effect of the filter assembly. Utility Model Content

[0003] The main purpose of the utility model is to provide a pre-filter and a water use system, aiming to ensure the filtering effect of the filter component and to increase the service life of the pre-filter.

[0004] To achieve the above-mentioned purpose, the pre-filter proposed by the present invention comprises:

[0005] A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet communicating with the water filter cavity, and a sewage outlet is provided on a side of the filter bottle away from the valve head;

[0006] A filter assembly is arranged in the water filter cavity;

[0007] An outer frame is provided in the water filter cavity and is rotatably sleeved outside the filter assembly;

[0008] The impeller assembly includes a mounting seat fixedly mounted in the water filter chamber and an impeller body rotatably mounted on the mounting seat. The impeller body and the exoskeleton are coaxially connected and fixed in the circumferential direction. The mounting seat includes a first water inlet arranged on one axial side, a second water inlet arranged on the circumferential side, and a drain outlet arranged on the other axial side. The first water inlet and the second water inlet are both connected to the drain outlet.

[0009] In one embodiment, the filter assembly includes a filter module, the filter module includes a support frame and a filter element, the support frame has a first water flow side located on one axial side and a second water flow side surrounding it in the circumferential direction, and the filter element is arranged on the second water flow side.

[0010] In one embodiment, the filter element is a straight cylindrical structure.

[0011] In one embodiment, the support frame is in a straight cylindrical structure, one side of the support frame is open and the other side is closed, and the first water flow side is located on the open side of the support frame.

[0012] In one embodiment, the filter assembly is fixed to the filter bottle in the circumferential direction, and the exoskeleton is rotatably connected to the filter assembly.

[0013] In one embodiment, the exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located on a side away from the valve head, the chassis is provided with a bottom cover on a side close to the filter assembly, the filter assembly includes a supporting frame, the supporting frame is rotatably connected to one side of the chassis, and the impeller body is connected to the other side of the chassis.

[0014] In one embodiment, a connecting groove is formed on the chassis, and a connecting protrusion is protruded from the supporting frame. The connecting protrusion is rotatably inserted into the connecting groove.

[0015] In one embodiment, the impeller body includes an impeller shaft, one end of the impeller shaft is provided with a flat portion, the chassis is correspondingly provided with a snap-fit ​​groove, and the flat portion is adapted to snap-fit ​​into the snap-fit ​​groove.

[0016] In one embodiment, the exoskeleton is formed with a siphon flow channel, and the exoskeleton includes a side frame and a chassis, the side frame is provided with a siphon hole connected to the siphon flow channel, and the chassis is provided with a first discharge port connected to the siphon flow channel, and the first discharge port is connected to at least one of the first water inlet and the second water inlet.

[0017] In one embodiment, the chassis is further provided with a second discharge port extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton and the mounting seat, the water retaining structure being arranged around the first discharge port, the second discharge port being located on the outer periphery of the water retaining structure, the first water inlet being connected to the first discharge port, and the second water inlet being connected to the second discharge port.

[0018] In one embodiment, the exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located on a side away from the valve head, the chassis is provided with a bottom cover on a side close to the filter assembly, the siphon flow channel includes a side wall flow channel and a bottom flow channel connected to the side wall flow channel, the side wall flow channel is arranged corresponding to the side frame, and the bottom flow channel is formed by the chassis and the bottom cover structure.

[0019] In one embodiment, the impeller body includes an impeller shaft, a limiting groove is provided in the mounting seat, a ball is installed in the limiting groove, and the impeller body is rotatably inserted in the limiting groove and rolls against the ball.

[0020] In one embodiment, the valve head and the filter bottle are connected by fasteners.

[0021] In one embodiment, a first flange is protruded from the outer periphery of the filter bottle, and a second flange is protruded from the outer periphery of the valve head. The first flange and the second flange abut against each other and are connected by fasteners.

[0022] In one embodiment, a water flow driving component is provided on the end side of the exoskeleton close to the water inlet, and the water flow driving component has a driving surface, which is arranged at an angle relative to the circumference of the exoskeleton, so that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow.

[0023] In one embodiment, the water flow driving member is snap-connected to the outer frame.

[0024] In one embodiment, the water flow driving component includes a hanging portion and a driving body connected to the hanging portion, the hanging portion is hung on the end of the exoskeleton and is clamped with the outer side of the exoskeleton, the driving body is hung on the inner side of the exoskeleton, and the driving surface is formed on the driving body.

[0025] In one embodiment, the driving body extends in an arc shape along the circumference of the outer frame, and is provided with a plurality of water baffles spaced apart from each other, and the driving surface is formed on the water baffles.

[0026] The utility model also provides a water use system, comprising the aforementioned pre-filter.

[0027] In the technical solution of the present invention, the pre-filter has a flushing mode, which can regularly clean impurities attached to the filter assembly. Under the disturbance of the exoskeleton and the impeller assembly, the flushed sewage can well carry away the impurities and discharge them out of the sewage outlet. In addition, the water flow path and flow rate entering the mounting seat can be increased through the first water inlet and the second water inlet, which can form a more complex flow pattern in the impeller cavity, providing sufficient power for the rotation of the impeller body. The exoskeleton and the impeller body can also move synchronously at a faster speed, thereby ensuring the disturbance of the water flow in the water filter cavity to avoid the sedimentation of impurities, thereby ensuring the flushing effect of the pre-filter, thereby ensuring the filtering effect of the filter assembly and increasing the service life of the pre-filter. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0029] Figure 1 A schematic diagram of the external structure of an embodiment of a pre-filter provided by the utility model;

[0030] Figure 2 This is a schematic diagram of the external structure of an embodiment of a valve head of a pre-filter provided by the present utility model;

[0031] Figure 3 A schematic cross-sectional view of an embodiment of a pre-filter provided by the present invention;

[0032] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0033] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0034] Figure 6 This is a schematic diagram of the assembly structure of the filter assembly and the outer frame of the pre-filter provided by the utility model in one embodiment;

[0035] Figure 7 A schematic structural diagram of an embodiment of a filter assembly of a pre-filter provided by the present invention;

[0036] Figure 8 This is a structural diagram of an exoskeleton of a pre-filter provided by the present invention from a first perspective;

[0037] Figure 9 This is a structural schematic diagram of an embodiment of the exoskeleton of the pre-filter provided by the present invention from another perspective;

[0038] Figure 10 This is a structural schematic diagram of an embodiment of an impeller assembly of a pre-filter provided by the present utility model;

[0039] Figure 11 for Figure 10 A structural diagram of the impeller assembly from another perspective;

[0040] Figure 12 for Figure 10 A schematic structural diagram of an impeller body in an impeller assembly according to an embodiment of the present invention.

[0041] Description of Figure Numbers:

[0042] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet; 110. First flange;

[0043] 20. Valve head; 201. Water inlet; 202. Water outlet; 203. Water isolation ring; 210. Second flange;

[0044] 30. Filter assembly; 301. First water flow side; 302. Second water flow side;

[0045] 310, filter module; 311, support frame; 312, filter element; 313, connecting protrusion;

[0046] 320, water distributor; 321, first water flow space; 322, second water flow space; 323, guide vane;

[0047] 40. Impeller assembly; 410. Mounting seat; 412. Limiting groove; 413. Ball;

[0048] 402, first water inlet; 403, second water inlet; 404, drain outlet; 424, water retaining ring;

[0049] 440, impeller body; 441, impeller shaft; 442, impeller blades; 443, flat position;

[0050] 50, exoskeleton; 501, siphon flow channel; 501a, side wall flow channel; 501b, bottom flow channel; 503, first discharge port; 504, second discharge port;

[0051] 511, chassis; 512, side frame; 514, water retaining ring; 517, snap-fit ​​groove; 518, connecting groove;

[0052] 520, bottom cover; 530, siphon component; 531, siphon hole;

[0053] 540, water flow driving member; 541, connecting portion; 542, driving body; 543, water baffle; 544, driving surface;

[0054] 1001. Fasteners.

[0055] 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

[0056] 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 embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0057] 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 in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0058] 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 for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. 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 mutually 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.

[0059] Water systems, such as whole-house water purification systems, typically feature a pre-filter to remove large particles from tap water. This not only ensures water safety but also extends the life of appliances, prevents clogged household water pipes, and improves residents' health. The pre-filter is the first coarse filtration device in a whole-house water purification system and is a physical filtration device used to protect back-end water safety.

[0060] The utility model proposes a pre-filter, which has a filtering mode and a flushing mode. In the filtering mode, the pre-filter can filter large particulate matter before the water end. In the flushing mode, the pre-filter can clean the filter components inside it to discharge the large particulate matter previously intercepted, thereby eliminating the need for manual disassembly and cleaning of the pre-filter, thereby increasing the service life of the pre-filter.

[0061] See also Figures 1 to 3In one embodiment of the present invention, the pre-filter includes a valve head 20 and a filter bottle 10, the filter bottle 10 is formed with a water filter chamber 101, the valve head 20 is provided with a water inlet 201 and a water outlet 202 connected to the water filter chamber 101, and the filter bottle 10 is provided with a sewage outlet 102 on the side away from the valve head 20.

[0062] The water inlet 201 is connected to the water supply end of the water supply system, and the water outlet 202 is connected to the water consumption end of the water supply system, thereby filtering the raw water flowing from the water supply end to the water consumption end. It should be noted that the water supply end can be a tap, water tower, or well water, and the water consumption end can be a faucet, shower, or drinking water outlet, which is not specifically limited in this application.

[0063] The valve head 20 and the filter bottle 10 can be connected by a threaded connection. For example, the valve head 20 may be provided with an externally threaded tube, and the mouth of the filter bottle 10 may be provided with corresponding internal threads for threading the externally threaded tube. To reduce the difficulty of pre-filter production and the requirements for assembly test results, as well as to reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by a fastener 1001.

[0064] Specifically, if Figure 1 As shown, a first flange 110 is protruding from the outer periphery of the filter bottle 10, and a second flange 220 is protruding from the outer periphery of the valve head 20. The first flange 110 and the second flange 220 abut against each other and are connected by a fastener 1001. It is understood that both the first flange 110 and the second flange 220 are provided with through-holes for the fastener 1001 to pass through. The fastener 1001 can be a bolt, which, through the threaded engagement between the bolt and the through-hole, achieves locking of the first flange 110 and the second flange 220. The fastener 1001 can also be a bolt and nut assembly, where the bolt passes through the through-hole and is locked to the nut. The fastener 1001 can also be a pin and a pin assembly, where the pin passes through the through-hole and the pin is passed through the pin, achieving locking of the first flange 110 and the second flange 220.

[0065] The valve head 20 comprises a connected metal outer shell and a plastic inner lining, with the water inlet 201 and water outlet 202 both formed in the plastic inner lining. The second flange 220 is formed on the metal outer shell. This ensures that water flowing through the pre-filter directly contacts the plastic inner lining, rather than the metal outer shell. This prevents water contamination by metallic elements precipitated from the metal outer shell, while also enhancing the pre-filter's aesthetics and housing strength. In other embodiments, the valve head 20 can also be configured directly as a metal component.

[0066] The materials of the metal shell and the plastic lining are not specifically limited in this application. For example, the material of the metal shell can be a copper alloy, such as brass, and the material of the plastic lining can be (polypropylene) or (polyvinyl chloride).

[0067] The pre-filter also includes a filter assembly 30 disposed within the water filter chamber 101. After raw water (e.g., tap water or well water) flows from an external water source into the water inlet 201, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria, and other particulate impurities generated in the pipeline. This provides better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to impurity blockage. The form and structure of the filter assembly 30 are not limited. The filter assembly 30 can be configured with a stainless steel filter mesh or a cotton filter mesh to filter impurities.

[0068] The pre-filter is usually a "T"-shaped structure. The upper "horizontal" position corresponds to the valve head 20, and the left and right ends are the water inlet 201 and the water outlet 202 respectively. The main body of the lower "vertical" is the filter bottle 10, and the sewage outlet 102 is located on the lower side of the filter bottle 10. The filter assembly 30 is arranged at the lower "vertical".

[0069] In one embodiment, please refer to Figure 3 and Figure 4 、 Figure 6 and Figure 7 The filter assembly 30 includes a filter module 310, which includes a support frame 311 and a filter element 312. The support frame 311 has a first water flow side 301 located on one side in the axial direction and a second water flow side 302 surrounding the support frame 311 in the circumferential direction. The filter element 312 is provided on the second water flow side 302. It can be understood that when water flows through the filter module 310, it will flow into one of the first water flow side 301 and the second water flow side 302, and then flow out from the other of the first water flow side 301 and the second water flow side 302. That is, the water will pass through the filter element 312 and thus be filtered by the filter element 312. Impurities are intercepted by the filter element 312, and the filtered water will flow to the user's water end through the water outlet 202. Without loss of generality, when the pre-filter is in filtering mode, the water inlet 201, the second water pass side 302, the first water pass side 301, and the water outlet 202 are sequentially arranged along the upstream and downstream directions. That is, the raw water entering from the water inlet 201 will first pass through the second water pass side 302 and flow into the inner periphery of the filter module 310, thereby being filtered by the filter element 312, and then flow out of the filter module 310 from the first water pass side 301 and flow to the water outlet 202.

[0070] Specifically, the filter element 312 is a straight cylindrical structure, and the support frame 311 is a corresponding straight cylindrical structure. One side of the support frame 311 is open and the other side is closed, with the first water-passing side 301 located on the open side of the support frame 311. This simplifies the structure of the support frame 311 and filter element 312, facilitating the processing and forming of the filter element 312 and the support bracket, as well as facilitating the installation of the filter assembly 30 within the water filter chamber 101. Furthermore, the support frame 311 and filter element 312 are both circumferentially continuous structures, ensuring structural strength and improving the filter assembly 30's ability to resist water flow impact, thereby ensuring the service life of the filter assembly 30. Of course, the filter element 312 and support frame 311 may also have other structural forms, such as a conical structure.

[0071] Optionally, the support frame 311 is made of plastic. First, plastic is less expensive than other materials such as metal, which helps reduce the manufacturing cost of the filter module 310. Second, plastic has good corrosion resistance to various chemical substances and can be used for a long time in various corrosive environments, reducing damage to the filter module 310 and the frequency of replacement due to corrosion. Third, the low density of plastic reduces the overall weight of the support frame 311, making it easier to install, transport, and maintain. Fourth, because plastic has good processing properties, it can be made into filter frames of various shapes and sizes through various processes such as injection molding and extrusion, facilitating the processing and shaping of the support frame 311. Of course, the present invention is not limited to this. In other embodiments, the support frame 311 can also be made of metal.

[0072] Optionally, the filter element 312 is made of metal. Metal is durable and stable, which can extend the service life of the filter element 312, thereby effectively filtering water for a long time and reducing replacement frequency and cost. Of course, the present invention is not limited to this. In other embodiments, the filter element 312 can also be made of plastic.

[0073] In this embodiment, the filter element 312 is configured as a metal filter. The metal filter has a sturdy structure and can withstand certain pressure and impact, ensuring safety during use. Furthermore, the metal filter can be customized according to user needs, such as customizing equipment of non-standard dimensions, to meet the needs of different support frames 311. Furthermore, the metal filter can be flushed and easily cleaned. Of course, the present invention is not limited to this. In other embodiments, the filter element 312 can also be configured as a filter membrane.

[0074] Optionally, the filter element 312 and the support frame 311 are integrally injection molded. It should be noted that the filter element 312 is metal, while the support frame 311 is made of plastic. During the production process, the filter element 312 is first installed in a mold, and then the support frame 311 is formed through an injection molding process. In this way, the filter element 312 is welded to the surface of the plastic support frame 311 by the high temperature within the mold, thus allowing the filter element 312 and the support frame 311 to be integrally injection molded. Directly joining the filter element 312 to the plastic support frame 311 during the injection molding process avoids secondary processing steps such as heat smelting, welding, and riveting, thereby shortening assembly time and reducing production costs. Furthermore, embedding the filter element 312 within the support frame 311 can improve the installation strength of the filter element 312, enabling it to withstand greater loads and impacts. Of course, the present invention is not limited to this embodiment. In other embodiments, the filter element 312 and the support frame 311 can also be formed separately and then connected by bonding or welding.

[0075] In one embodiment, please refer to Figure 3 and Figure 4 、 Figure 6 and Figure 7 The pre-filter also includes a water distributor 320, which is provided with a first water flow space 321 and a second water flow space 322 arranged around the first water flow space 321. One axial side of the water distributor 320 is connected to the valve head 20, and the other axial side is connected to the filter module 310, so that the first water flow side 301 is connected to the water outlet 202 through the first water flow space 321, and the second water flow side 302 is connected to the water inlet 201 through the second water flow space 322. The second water flow space 322 is provided with a guide blade 323 that is inclined relative to the axial direction.

[0076] The axial sides of the water distributor 320 are respectively connected to the filter module 310 and the valve head 20. In the flushing mode and filtering mode of the pre-filter, the first water flow space 321 and the second water flow space 322 of the water distributor 320 will maintain communication with the above-mentioned corresponding structures, that is, the pre-filter is a positive flushing filter. In the flushing mode and filtering mode, the flow path of water flowing into the filter assembly 30 does not change.

[0077] In the filtering mode, the water inlet 201 and the water outlet 202 are opened, and the sewage outlet 102 is closed. After the water entering the water inlet 201 passes through the first water flow space 321 and enters the water filter chamber 101, it will flow from the outer periphery of the filter component 30 through the second water flow port of the filter component 30 and enter the inner periphery of the filter component 30, thereby being filtered by the filter element 312. Impurities are intercepted by the filter element 312, and the filtered water will flow to the water outlet 202 through the second water flow space 322.

[0078] In the flushing mode, the water inlet 201 and the sewage outlet 102 are opened, and the water outlet 202 is closed. The water entering the water inlet 201 still enters the water filter chamber 101 through the first water flow space 321. After the water flow flushes the surface of the filter element 312, the sewage will be discharged through the sewage outlet 102, thereby discharging the impurities previously intercepted, which can reduce the adhesion of impurities on the filter element 312, thereby ensuring the filtering effect of the filter assembly 30 and improving the service life of the pre-filter.

[0079] Among them, the guide blades 323 arranged in the second water flow space 322 enable the water flow entering the water filter chamber 101 to form a vortex, so as to disturb the water flow and avoid the deposition of impurities. Especially in the flushing mode, the impurities can be better entrained in the water flow, thereby facilitating the discharge of impurities from the sewage outlet 102 along with the water flow.

[0080] Further, please also refer to Figure 3 and Figure 4 , the valve head 20 is provided with a water-isolating ring 203 between the water inlet 201 and the water outlet 202, the water inlet 201 is connected to the outer peripheral side of the water-isolating ring 203, the water outlet 202 is connected to the inner peripheral side of the water-isolating ring 203, and the water distributor 320 and the water-isolating ring 203 are plugged in and sealed. Specifically, the water distributor 320 is inserted into the inner side of the water-isolating ring 203, and a sealing ring is sleeved on the outer periphery of the water distributor 320, and the outer peripheral side of the sealing ring abuts against the inner peripheral side of the water-isolating ring 203, thereby achieving a sealed fit between the two. In this way, the water distributor 320 and the water-isolating ring 203 can be stably connected, and the connection between the two will not leak. The raw water that has not been filtered by the filter element 312 and the clean water filtered by the filter element 312 will not leak into each other, which is beneficial to ensuring the filtering effect of the pre-filter.

[0081] In one embodiment, see Figures 3 to 6 The pre-filter also includes an exoskeleton 50, which is rotatably mounted on the outside of the filter assembly 30. In this way, the exoskeleton 50 can be rotated to disturb the water flow in the water filter chamber 101, thereby preventing impurities from being deposited and adhering to the filter assembly 30, the exoskeleton 50, and the side walls of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, and thus ensuring the filtering effect of the filter assembly 30. In this embodiment, the exoskeleton 50 includes a side frame 512 and a chassis 511. The chassis 511 is connected to the side frame 512 and is located on the side away from the valve head 20. It has strong structural stability and high rotation stability. Of course, in other embodiments, the exoskeleton 50 may only include the side frame 512 structure.

[0082] In one embodiment, see Figure 8The side frame 512 is provided with a water flow driving member 540. The water flow driving member 540 has a driving surface 544. The driving surface 544 is arranged at an angle relative to the circumference of the exoskeleton 50, so that when the driving surface 544 is impacted by the water flow, it can drive the exoskeleton 50 to rotate. In this way, when the driving surface 544 is driven by the water flow, the water flow driving member 540 can generate a driving force on the exoskeleton 50 in the circumferential direction of the exoskeleton 50, thereby causing the exoskeleton 50 to rotate about its axis, that is, about the axial direction of the filter assembly 30. The kinetic energy of the water flow can be converted into kinetic energy for the rotation of the exoskeleton 50 through the driving surface 544, thereby achieving the rotation of the exoskeleton 50, thereby disturbing the water flow in the water filter chamber 101, preventing impurities from being deposited and adhering to the filter assembly 30, the exoskeleton 50, and the sidewalls of the water filter chamber 101, reducing the possibility of clogging of the filter assembly 30, and thus improving the filtering effect of the filter assembly 30. Furthermore, the water flow can form a swirl after passing through the water distributor 320, thereby providing a greater driving force through the driving surface 544. In other words, the water distributor 320 and the water flow driving member 540 cooperate to provide a certain rotational driving force to the exoskeleton 50. The impeller body 440 itself rotates under the impact of the water flow and drives the exoskeleton 50, which can also provide a certain rotational driving force to the exoskeleton 50. These two rotational driving forces are arranged in the same direction.

[0083] In one embodiment, the water flow drive member 540 is snap-fitted to the end of the side frame 512. The water flow drive member 540 is snap-fitted to the end of the side frame 512, enabling separate molding of the side frame 512 and the water flow drive member 540, thereby improving molding efficiency and convenience. The snap-fit ​​connection between the side frame 512 and the water flow drive member 540 facilitates operation and allows the water flow drive member 540 to remain stable at the end of the side frame 512, thereby improving production efficiency. Of course, in other embodiments, the water flow drive member 540 may be screwed, fused, or integrally molded to the side frame 512, or the water flow drive member 540 may be snap-fitted to the axial center of the side frame 512.

[0084] Specifically, in this embodiment, the side frames 512 are provided with a plurality of water flow drive members 540, which are spaced apart along the circumference of the exoskeleton 50. It will be appreciated that the plurality of water flow drive members 540 are spaced apart at the ends of the side frames 512 around the circumference of the exoskeleton 50. This allows the plurality of drive surfaces 544 distributed circumferentially around the exoskeleton 50 to be evenly distributed, thereby balancing the circumferential driving force exerted on the exoskeleton 50, allowing the exoskeleton 50 to rotate at a uniform speed and ensuring a cleaning effect on the filter assembly 30. Without loss of generality, in this embodiment, the water flow drive members 540 are provided with a plurality of drive surfaces 544, which are evenly distributed along the circumference of the exoskeleton 50 on the water flow drive members 540. The plurality of water flow drive members 540 are evenly distributed circumferentially around the side frames 512, thereby ensuring that the drive surfaces 544 are evenly distributed circumferentially around the side frames 512, thereby ensuring the rotational stability of the exoskeleton 50. Of course, in other embodiments, the plurality of water flow driving members 540 may also be distributed along the axial direction of the side frame 512 to balance the rotational stability of the exoskeleton 50 in the axial direction.

[0085] Regarding the connection between the water flow drive member 540 and the side frame 512, in this embodiment, the water flow drive member 540 includes a hooking portion 541, which is hooked to the end of the side frame 512 and is hooked to the side frame 512. It can be understood that the water flow drive member 540 is hooked axially from the end of the side frame 512 toward the side frame 512, which facilitates the connection operation and is stable. After the hooking portion 541 is hooked to the side frame 512, the water flow drive member 540 is hooked to the side frame 512. Here, the hooking portion 541 can be hooked to the side frame 512, or other parts of the water flow drive member 540 can be hooked to the side frame 512. In this way, the hooking connection provides a positioning reference for the connection between the water flow drive member 540 and the side frame 512, simplifying the connection between the water flow drive member 540 and the side frame 512. In addition, after the hooking portion 541 is hooked to the side wall, it forms a radial limit for the water flow driving member 540, preventing the water flow driving member 540 from moving radially relative to the side frame 512. Of course, in other embodiments, the water flow driving member 540 can also be connected to the side wall by inserting or by using a knob.

[0086] The water flow drive member 540 also includes a drive body 542 connected to a hooking portion 541. The drive body 542 is mounted on the inner side of the side frame 512. The hooking portion 541 engages with the outer side of the side frame 512, and a drive surface 544 is formed on the drive body 542. Without loss of generality, the gap between the exoskeleton 50 and the housing is relatively small, while the gap between the exoskeleton 50 and the filter assembly 30 is relatively large to ensure efficient filtration of water through the filter assembly 30. Thus, the drive body 542 with the drive surface 544 is disposed on the inner side of the side frame 512 to prevent the tension between the sidewall of the water filter chamber 101 and the water flow from affecting the impact force of the water flow on the drive surface 544, thereby ensuring the rotational stability and reliability of the exoskeleton 50. Furthermore, since the drive surface 544 is disposed within the drive body 542, the drive body 542 inevitably maintains good flatness around the side frame 512. Positioning the drive body 542 inside the side frame 512 ensures the flatness of the outer side of the exoskeleton 50, prevents the housing from interfering with the rotation of the exoskeleton 50, and ensures that the drive surface 544 receives sufficient water flow impact. Simultaneously, the attachment portion 541 is secured to the outer side of the side frame 512, with the drive body 542 positioned inside the side frame 512. This balances the forces acting on the water flow drive member 540 in the inward and outward directions of the side frame 512, thereby ensuring a stable connection between the water flow drive member 540 and the side frame 512. Of course, in other embodiments, if the gap between the side frame 512 and the wall of the water filter chamber 101 is large, the drive body 542 may also be positioned outside the side frame 512.

[0087] In one embodiment, the driving surface 544 is parallel to the axial direction of the exoskeleton 50. It is understood that the driving surfaces 544 are distributed circumferentially around the side frame 512, similar to the arrangement of the guide vanes 323 in the water distributor 320. The guide vanes 323 guide the water flow, directing the water flow to impact the driving surface 544. Alternatively, a diversion structure can be provided on the channel wall between the water inlet 201 and the water drive member 540 to direct the water flow in a vortex-like manner along the axial direction of the filter assembly 30, thereby directly impacting the driving surface 544 parallel to the axial direction of the exoskeleton 50. This allows the water drive member 540 to obtain a greater water flow impact force, thereby increasing the rotational speed or efficiency of the exoskeleton 50, preventing impurities from adhering to the filter assembly 30, ensuring the cleanliness of the filter assembly 30, and improving the filtration efficiency of the filter assembly 30. Of course, in other embodiments, the driving surface 544 can also be inclined relative to the axial direction of the exoskeleton 50, or radially relative to the side frame 512.

[0088] In one embodiment, the driving body 542 extends in an arc shape along the circumference of the side frame 512 and is provided with a plurality of water baffles 543 spaced apart at intervals. The driving surface 544 is formed on the water baffles 543. Without loss of generality, the water baffles 543 protrude from the driving body 542, and the driving surface 544 is formed on the sidewall of the water baffle 543 along the circumference of the side frame 512, so that the driving surface 544 has a certain radial dimension, ensuring that the driving surface 544 is stably impacted by the water flow. At the same time, the driving body 542 extends in an arc shape along the inner circumference of the side frame 512, and the plurality of water baffles 543 are spaced apart in the extension direction of the driving body 542, so as to evenly distribute the driving force along the circumference of the side frame 512 and ensure the stability of the rotation of the exoskeleton 50. Furthermore, the drive body 542 is conformally arranged on the inner circumferential wall of the side frame 512, and the two fit closely together. When the drive body 542 is subjected to force, the inner wall of the side frame 512 can provide sufficient stable support for the drive body 542, thereby effectively pulling the side frame 512 to rotate, avoiding shaking between the water flow drive member 540 and the side frame 512, which would cause energy waste, ensuring the rotation efficiency of the exoskeleton 50, and improving the cleaning effect of the filter assembly 30. Of course, in other embodiments, the drive body 542 can also be provided with a recessed drive groove, with the side groove wall of the drive groove configured as the drive surface 544.

[0089] In one embodiment, please refer to Figure 3 and Figure 5 The pre-filter also includes an impeller assembly 40, which includes a mounting seat 410 fixedly mounted in the water filter chamber 101 and an impeller body 440 rotatably mounted on the mounting seat 410, the impeller body 440 and the exoskeleton 50 are coaxially connected and fixed in the circumferential direction, the mounting seat 410 includes a first water inlet 402 provided on one axial side, a second water inlet 403 provided on the circumferential side, and a drain outlet 404 provided on the other axial side, the first water inlet 402 and the second water inlet 403 are both connected to the drain outlet 404. It can be understood that the mounting seat 410 is arranged in the water filter chamber 101, and the first water inlet 402, the second water inlet 403 and the drain outlet 404 can all be connected to the water filter chamber 101. The drain outlet 404 will be located on the side close to the sewage outlet 102, and can serve as the downstream of the first water inlet 402 and the second water inlet 403. The water flow from the water inlet 201 into the water filter chamber 101 can flow through the impeller assembly 40 in sequence through the first water inlet 402, the second water inlet 403 and the drain outlet 404, and finally flow to the sewage outlet 102.

[0090] Without loss of generality, the mounting seat 410 is provided with a sealing ring on the outer sleeve and is sealed to the inner circumferential wall of the filter bottle 10 through the sealing ring. The first water inlet 402 and the second water inlet 403 are located on one axial side of the sealing ring and are on the side close to the water inlet 201. The drain outlet 404 is located on the other axial side of the sealing ring and is on the side close to the sewage outlet 102. In this way, the water inlet side and the water outlet side of the mounting seat 410 are separated from each other on the outside by the sealing ring, so that the first water inlet 402 and the second water inlet 403 can only be connected through the internal space of the mounting seat 410. That is, when the water flows through the mounting seat 410, it will enter the internal space of the mounting seat 410, driving the impeller body 440 to rotate.

[0091] Therefore, when the exoskeleton 50 is equipped with a water flow driving member 540, on the one hand, the exoskeleton 50 can be driven by the vortex generated by the water distributor 320 under the action of the water flow driving member 540, and rotate. The rotation of the exoskeleton 50 can also drive the impeller body 440 to rotate. The impeller body 440 can thereby disturb the water flow entering the internal space of the mounting seat 410, thereby preventing impurities from being deposited in the internal space of the mounting seat 410. On the other hand, after the water flow enters the internal space of the mounting seat 410, it acts on the blades of the impeller body 440, which can provide a driving force for the rotation of the impeller body 440, thereby in turn driving the rotation of the exoskeleton 50. In this way, the rotation of the exoskeleton 50 and the impeller body 440 can promote each other, thereby ensuring the disturbance of the water flow inside the water filter chamber 101, so as to avoid the deposition of impurities to the greatest extent, thereby ensuring the flushing effect of the pre-filter. Of course, when only the impeller assembly 40 is provided, the impeller body 440 drives the outer skeleton 50 to rotate, which is also beneficial to avoid the deposition of impurities, thereby ensuring the flushing effect of the pre-filter.

[0092] Without loss of generality, see Figure 12 The impeller body 440 includes an impeller shaft 441 and a plurality of impeller blades 442 obliquely arranged on the impeller shaft 441. The water flow from the first water inlet 402 and the second water inlet 403 can cause the impeller blades 442 to drive the impeller shaft 441 to rotate. Specifically, one side of the impeller blade 442 is curved into an arc surface, with one portion of the arc surface facing the first water inlet 402 and the other portion facing the second water inlet 403. In this way, the impeller blade 442 can be acted upon by the water flow from the second side water inlet 403 and the first top water inlet 402 to drive the impeller shaft 441 to rotate. In this way, the water flow path and flow rate entering the mounting seat 410 are increased through the first water inlet 402 and the second water inlet 403. The provision of multiple water inlets can form a more complex flow pattern in the impeller chamber, providing sufficient power for the rotation of the impeller body 440.

[0093] Furthermore, if Figure 5As shown, the impeller body 440 includes an impeller shaft 441. A limiting groove 412 is provided in the mounting seat 410. A ball 413 is installed in the limiting groove 412. The impeller body 440 is rotatably inserted in the limiting groove 412 and rolls against the ball 413. It can be understood that the ball 413 can rotate and roll freely in the limiting groove 412. During the rotation of the impeller body 440, rolling friction occurs between the ball 413 and the impeller shaft 441, reducing the friction force on the impeller shaft 441, thereby improving the smoothness and efficiency of the rotation of the impeller body 440, thereby ensuring the stirring effect of the impeller body 440 on the water flow. At the same time, the setting of the ball 413 also reduces the length of the protrusion of the impeller shaft 441 inserted into the limiting groove 412, improves the bending resistance of the protrusion, ensures that the impeller shaft 441 can withstand the impact force of the water flow, and thus improves the rotation stability of the impeller body 440.

[0094] In one embodiment, the exoskeleton 50 is formed with a siphon channel 501, a siphon hole 531 communicating with the siphon channel 501, and a first discharge port 503. The first discharge port 503 is connected to at least one of the first water inlet 402 and the second water inlet 403. Thus, in flushing mode, when impurities and particulate matter intercepted by the filter assembly 30 are dislodged by the water flow, they are drawn into the siphon hole 531 and the siphon channel 501 by the siphon effect, and more efficiently flow through the first discharge port 503 toward the impeller assembly 40, ultimately being discharged to the sewage outlet 102. In other words, in flushing mode, impurities and particulate matter intercepted by the filter assembly 30 can be more quickly and effectively directed to the sewage outlet 102, where they are ultimately discharged, thereby enhancing the flushing effect on the water filter chamber 101, particularly the filter assembly 30.

[0095] Specifically, see Figure 5 The siphon flow channel 501 includes a connected side wall flow channel 501a and a bottom flow channel 501b. The side wall flow channel 501a is set corresponding to the side frame 512, and the bottom flow channel 501b is set corresponding to the bottom plate 511 to provide a siphon hole 531. There are multiple siphon holes 531 distributed at intervals along the extension direction of the side wall flow channel 501a. The first discharge port 503 is located at the end of the bottom flow channel 501b, that is, at the end away from the side wall flow channel 501a.

[0096] The side wall flow channel 501a can be formed by the side frame 512 itself; it can also be a part formed separately with the side wall flow channel 501a. In this embodiment, the siphon member 530 and the side frame 512 that constitute the side wall flow channel 501a together form the side wall flow channel 501a. The number of siphon members 530 corresponds to the number of siphon flow channels 501, and the siphon holes 531 are set on the siphon member 530.

[0097] Reference Figure 4There are various ways to secure the siphon member 530 to the side frame 512. For example, the siphon member 530 can be locked to the side frame 512. This is inconvenient during installation or maintenance. In this embodiment, to facilitate and secure installation, the siphon member 530 and the side frame 512 can be assembled and snapped together using slides and rails. This allows the siphon member 530 to be more easily inserted and secured to the side frame 512, while also facilitating removal and improving operational convenience.

[0098] In one embodiment, see Figure 8 The exoskeleton 50 further includes a bottom cover 520, which, when combined with the chassis 511, forms the bottom flow channel 501b. Thus, the bottom flow channel 501b is formed by assembling the separately formed bottom cover 520 and chassis 511, which facilitates the processing and forming of the bottom flow channel 501b, improves production convenience, and ensures the yield rate of the finished product. Of course, in other embodiments, the bottom flow channel 501b may be formed using a separate part and then installed in the slot of the chassis 511.

[0099] Specifically, multiple siphon channels 501 are provided at intervals along the circumference of the exoskeleton 50. A number of first discharge ports 503 are provided corresponding to the number of siphon channels 501, and the first discharge ports 503 are connected to a bottom channel 501b. To ensure effective drainage, each bottom channel 501b has a corresponding first discharge port 503. To simplify installation and facilitate connection between the bottom cover 520 and the chassis 511, the bottom cover 520 is integrally formed with multiple covering portions, each of which encloses the chassis 511 to form a bottom channel 501b. By designing multiple covering portions connected to the chassis 511, each covering portion encloses the chassis 511 to form a bottom channel 501b, making the connection between the bottom cover 520 and the chassis 511 more convenient and accurate.

[0100] Each siphon channel 501 is provided with an independent first discharge port 503. To ensure smooth drainage, the first discharge ports 503 are all tilted in the same direction from the upper surface of the chassis 511 toward the lower surface. The tilted first discharge port 503 can guide the water to flow out more smoothly, reducing the stagnation and vortex phenomenon of water in the bottom channel 501b. This helps to prevent impurities from accumulating in the bottom channel 501b and keep the pre-filter clean and operating efficiently. The first discharge port 503 is tilted axially clockwise or counterclockwise. The tilted first discharge port 503 also has a certain anti-backflow function and can also form a vortex in the drainage. The efficient bottom channel 501b and first discharge port 503 design enable the pre-filter to discharge impurities and sewage faster, improving the filtering effect and the overall performance of the system. In order to avoid water outlet interference, the first discharge port 503 is located at the end of the bottom channel 501b.

[0101] Reference Figure 5The bottom plate 511 is further provided with a second discharge port 504 extending axially therethrough. In the filter flushing mode, the sewage cleaned from the filter assembly 30 can be drawn into the siphon channel and discharged toward the sewage outlet 102 through the first discharge port 503. Furthermore, the sewage can be discharged toward the sewage outlet 102 through the second discharge port 504. This helps to speed up the water flow and improve sewage discharge efficiency.

[0102] The chassis 511 can be provided with a plurality of second drain ports 504. These second drain ports 504 can be evenly distributed or arranged in a targeted manner as needed to maximize drainage efficiency. Specifically, a plurality of second drain ports 504 are provided, and the second drain ports 504 are arranged between two adjacent siphon channels 501 and closer to the outer periphery of the chassis 511 relative to the first drain ports 503. The second drain ports 504 are arranged in a position symmetrical to the first drain ports 503 to ensure that the entire exoskeleton 50 is evenly impacted by the water flow and the water flow passes through, which helps to disperse the drainage pressure, improve the drainage efficiency, and ensure the structural strength of the exoskeleton 50.

[0103] In one embodiment, please refer to Figure 9 and Figure 10 A water retaining structure is formed on the opposite sides of the exoskeleton 50 and the mounting seat 410 , and the water retaining structure is arranged around the first discharge port 503 . The second discharge port 504 is located on the periphery of the water retaining structure to communicate with the second water inlet 403 .

[0104] Specifically, a water retaining ring 514 is provided at the bottom of the exoskeleton 50, and a water retaining ring 424 is provided at the mounting base 410. The water retaining ring 514 and the water retaining ring 424 cooperate to form a water retaining structure. The siphon flow channel 501 and the first water inlet 402 are connected at the inner periphery of the water retaining structure, and the water filter cavity 101 at the outer periphery of the filter assembly 30 is connected to the second water inlet 403 at the outer periphery of the water retaining structure through the second discharge port 504. Furthermore, the mounting base 410 is provided with second water inlets 403 on both opposite sides. When draining, water in the filter bottle 10 other than the siphon flow channel 501 can enter from these two second water inlets 403. Four first water inlets 402 inclined in the same direction are designed on the top of the mounting base 410. The water flowing out of the siphon flow channel 501 enters the inner cavity of the mounting base 410 through the first water inlet 402. In this way, the water inlet paths of the two water inlets of the impeller assembly 40 can be separated by the water retaining structure without interfering with each other, and can prevent excessive water flow from other positions from entering the first water inlet 402 at the top of the mounting seat 410, thereby ensuring the adsorption capacity of the siphon channel 501.

[0105] In one embodiment, please refer to Figures 3 to 5The filter assembly 30 is circumferentially fixed to the filter bottle 10, and the exoskeleton 50 is rotatably connected to the filter assembly 30. In this way, a connection and cooperation relationship exists between the filter assembly 30 and the exoskeleton 50, which is conducive to ensuring the rotational stability of the exoskeleton 50. It can be understood that the filter assembly 30 and the impeller assembly 40 will be located on opposite sides of the chassis 511. Without loss of generality, the support skeleton 311 is rotatably connected to one side of the chassis 511, and the impeller body 440 is connected to the other side. Specifically, the chassis 511 is formed with a connecting groove 518, and the support skeleton 311 is provided with a connecting protrusion 313, and the connecting protrusion 313 is rotatably inserted into the connecting groove 518. One end of the impeller shaft 441 is provided with a flat position 443, and the chassis 511 is correspondingly provided with a snap-in groove 517, and the flat position 443 is adapted to snap-in into the snap-in groove 517. In this way, the support frame 311 and the bottom cover 520 can be rotatably connected, and the impeller body 440 and the outer frame 50 can be driven together. When the bottom cover 520 is installed on the chassis 511, the bottom cover 520 is provided with an escape groove corresponding to the chassis 511, so that the connecting groove 518 can be exposed for the connection of the connecting protrusion 313.

[0106] The present invention also provides a water system including a prefilter. The specific structure of the prefilter is similar to that of the above-described embodiments. Since the present water system utilizes all of the technical solutions of all of the above-described embodiments, it at least possesses all of the beneficial effects of the technical solutions of the above-described embodiments, and therefore will not be further detailed here. The water system includes at least the relevant components from the prefilter to the water supply terminal. For example, the water system may include household appliances such as a water heater, a dishwasher, and a water dispenser, as well as accessories such as water pipes for household water supply.

[0107] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: A valve head and a filter bottle, wherein the filter bottle is formed with a water filter cavity, the valve head is provided with a water inlet and a water outlet communicating with the water filter cavity, and a sewage outlet is provided on a side of the filter bottle away from the valve head; A filter assembly is arranged in the water filter cavity; An outer frame is provided in the water filter cavity and is rotatably sleeved outside the filter assembly; The impeller assembly includes a mounting seat fixedly mounted in the water filter chamber and an impeller body rotatably mounted on the mounting seat. The impeller body and the exoskeleton are coaxially connected and fixed in the circumferential direction. The mounting seat includes a first water inlet arranged on one axial side, a second water inlet arranged on the circumferential side, and a drain outlet arranged on the other axial side. The first water inlet and the second water inlet are both connected to the drain outlet.

2. The prefilter according to claim 1, wherein The filter assembly includes a filter module, which includes a support frame and a filter element. The support frame has a first water flow side located on one axial side and a second water flow side surrounding it in the circumferential direction. The filter element is arranged on the second water flow side.

3. The prefilter according to claim 2, wherein: The filter element is a straight cylindrical structure.

4. The prefilter according to claim 3, characterized in that The support frame is in a straight cylindrical structure, one side of the support frame is open and the other side is closed, and the first water-passing side is located on the open side of the support frame.

5. The prefilter according to claim 1, wherein: The filter assembly is fixed to the filter bottle in the circumferential direction, and the exoskeleton is rotatably connected to the filter assembly.

6. The prefilter according to claim 5, characterized in that The exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located on a side away from the valve head, the chassis is provided with a bottom cover on a side close to the filter assembly, the filter assembly includes a supporting frame, the supporting frame is rotatably connected to one side of the chassis, and the impeller body is connected to the other side of the chassis.

7. The prefilter according to claim 6, wherein: The chassis is formed with a connecting groove, and the supporting frame is convexly provided with a connecting protrusion, and the connecting protrusion is rotatably inserted into the connecting groove.

8. The pre-filter according to claim 7, characterized in that The impeller body includes an impeller shaft, one end of the impeller shaft is provided with a flat portion, the chassis is correspondingly provided with a clamping groove, and the flat portion is adapted to be clamped in the clamping groove.

9. The prefilter according to claim 1, wherein: The exoskeleton forms a siphon flow channel, and the exoskeleton includes a side frame and a chassis. The side frame is provided with a siphon hole connected to the siphon flow channel, and the chassis is provided with a first discharge port connected to the siphon flow channel. The first discharge port is connected to at least one of the first water inlet and the second water inlet.

10. The pre-filter according to claim 9, characterized in that The chassis is also provided with a second discharge port extending axially therethrough, and a water retaining structure is formed on opposite sides of the exoskeleton and the mounting seat. The water retaining structure is arranged around the first discharge port, and the second discharge port is located on the outer periphery of the water retaining structure. The first water inlet is connected to the first discharge port, and the second water inlet is connected to the second discharge port.

11. The prefilter according to claim 9, wherein The exoskeleton includes a side frame and a chassis, the chassis is connected to the side frame and is located on a side away from the valve head, the chassis is provided with a bottom cover on a side cover close to the filter assembly, the siphon flow channel includes a side wall flow channel and a bottom flow channel connected to the side wall flow channel, the side wall flow channel is arranged corresponding to the side frame, and the bottom flow channel is formed by the chassis and the bottom cover structure.

12. The pre-filter according to claim 1, wherein The impeller body includes an impeller shaft. A limiting groove is provided in the mounting seat. A ball is installed in the limiting groove. The impeller body is rotatably inserted in the limiting groove and rolls against the ball.

13. The pre-filter according to claim 1, wherein: The valve head and the filter bottle are connected by fasteners.

14. The pre-filter according to claim 13, wherein: A first flange is convexly provided on the outer periphery of the filter bottle, and a second flange is convexly provided on the outer periphery of the valve head. The first flange and the second flange are in abutment with each other and are connected by fasteners.

15. The pre-filter according to claim 1, wherein A water flow driving member is provided on the end side of the exoskeleton close to the water inlet. The water flow driving member has a driving surface. The driving surface is set at an angle relative to the circumference of the exoskeleton, so that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow.

16. The pre-filter according to claim 15, characterized in that The water flow driving component is clamped to the outer frame.

17. The pre-filter according to claim 15, wherein: The water flow driving component includes a hanging part and a driving body connected to the hanging part. The hanging part is hung on the end of the outer frame and is clamped with the outer side of the outer frame. The driving body is hung on the inner side of the outer frame, and the driving surface is formed on the driving body.

18. The pre-filter according to claim 17, wherein: The driving body extends in an arc shape along the circumference of the outer frame and is provided with a plurality of water baffles distributed at intervals. The driving surface is formed on the water baffles.

19. A water system, characterized in that: The pre-filter comprises the pre-filter according to any one of claims 1 to 18.

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