Pre-filter and water system

Abstract

The utility model discloses a pre-filter and a water system, and relates to the technical field of water purification equipment, the pre-filter comprises a shell, an outer framework and an impeller body; the shell is provided with a water inlet, a water outlet and a water filtering cavity communicated with the water inlet and the water outlet, and a filtering assembly is arranged in the water filtering cavity; the outer framework is rotatably arranged in the water filtering cavity and arranged outside the filtering assembly in a sleeving manner, the outer framework is provided with a water flow driving part, the water flow driving part is provided with a driving surface, and the driving surface is arranged at an included angle relative to the circumferential direction of the outer framework, so that the driving surface can drive the outer framework to rotate after being impacted by water flow; the impeller body is arranged in the water filtering cavity and is in transmission connection with the outer framework. According to the technical scheme, the outer framework is driven to rotate through the water flow driving piece and the impeller body, impurity attachment is reduced, and the filtering effect is improved.

Description

Technical Field

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

[0002] Conventional prefilters include a housing and a filter assembly disposed within the housing. During use, water flows from the water inlet into the filter chamber, is filtered by the filter assembly, and then flows to the water outlet. However, impurities easily accumulate within the filter chamber, particularly on the surface of the filter assembly. Over time, these impurities can clog the filter assembly and reduce its filtering effectiveness. Utility Model Content

[0003] The main purpose of the utility model is to provide a pre-filter and water use system, which aims to drive the outer skeleton to rotate through the water flow driving member and the impeller body, thereby reducing the adhesion of impurities and improving the filtering effect.

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

[0005] The housing is provided with a water inlet, a water outlet and a water filter cavity communicating with the water inlet and the water outlet, wherein a filter assembly is provided in the water filter cavity;

[0006] an exoskeleton rotatably disposed within the water filter cavity and sleeved onto the filter assembly, the exoskeleton being provided with a water flow driving member having a driving surface, the driving surface being arranged at an angle relative to the circumference of the exoskeleton such that the driving surface can drive the exoskeleton to rotate after being impacted by the water flow; and

[0007] The impeller body is arranged in the water filtering chamber, and the impeller body is transmission-connected to the outer frame.

[0008] In one embodiment, the water flow driving component and the impeller body are respectively arranged at two axial ends of the outer frame.

[0009] In one embodiment, the water flow driving component is disposed at an end of the outer frame close to the water inlet, and the impeller body is disposed at an end of the outer frame away from the water inlet.

[0010] In one embodiment, the shell is further provided with a sewage outlet connected to the water filter chamber, the sewage outlet is connected to the water filter chamber, and is located at an end of the impeller body away from the outer frame.

[0011] In one embodiment, the pre-filter further includes a mounting seat, which is disposed in the water filter chamber and located between the exoskeleton and the sewage outlet. An impeller chamber is disposed in the mounting seat, and the impeller body is rotatably disposed in the impeller chamber.

[0012] In one embodiment, a first avoidance opening is provided on a side of the mounting seat facing the outer frame, the impeller body includes an impeller shaft, and a clamping portion is provided on a side of the outer frame facing the mounting seat, and the impeller shaft passes through the first avoidance opening and is clamped to the clamping portion.

[0013] In one embodiment, the clamping portion is configured as a plurality of first protrusions distributed in a circumferential manner, and a plurality of second protrusions are provided at one end of the impeller shaft close to the outer skeleton. The plurality of second protrusions are distributed along the circumference of the impeller shaft, and one first protrusion is clamped between two adjacent second protrusions.

[0014] In one embodiment, the pre-filter also includes a reversing structure, the impeller body includes a hollow impeller shaft, the reversing structure includes a reversing bottom shell and a reversing member, the reversing bottom shell is arranged on the side of the mounting seat away from the outer skeleton, and the reversing member passes through the impeller shaft from the reversing bottom shell and can rotate relative to the impeller body.

[0015] In one embodiment, a third avoidance opening is provided on the side of the mounting seat facing the reversing bottom shell, the reversing member is passed through the third avoidance opening, and a supporting boss is provided on the periphery of the third avoidance opening along the axial direction of the reversing member toward the impeller shaft, the outer diameter of the supporting boss is smaller than the outer diameter of the impeller shaft, and the supporting boss abuts against the end of the impeller shaft.

[0016] In one embodiment, a snap-in groove is recessed on one side of the exoskeleton facing the mounting seat, the impeller body includes an impeller shaft, and at least one flat position is provided circumferentially of the impeller shaft. The impeller shaft is inserted into the snap-in groove, and the flat position is adapted to abut against the side groove wall of the snap-in groove.

[0017] In one embodiment, the impeller body includes an impeller shaft. In the impeller cavity, a cavity wall of the mounting seat away from the outer skeleton is provided with a limiting groove, and one end of the impeller shaft away from the outer skeleton is rotatably inserted into the limiting groove.

[0018] In one embodiment, the mounting seat is further provided with a ball, which is arranged at the bottom of the limiting groove and is in rolling contact with the impeller shaft.

[0019] In one embodiment, a clearance groove is recessed on the side of the mounting seat facing the outer frame around the first avoidance opening, and the clamping portion is protruded on the side of the outer frame facing the mounting seat and is accommodated in the clearance groove on the outer periphery of the impeller shaft.

[0020] In one embodiment, a sealing ring is provided on the outer periphery of the mounting seat, the sealing ring is in sealing contact between the mounting seat and the inner wall of the housing, and the impeller chamber is located on a side of the sealing ring close to the outer frame.

[0021] In one embodiment, the outer frame includes side frames enclosed along the circumferential direction, and the water flow driving member is clamped to the end of the side frame close to the water inlet.

[0022] In one embodiment, the water flow driving member includes a hanging portion, which is hung on the end of the side frame and is clamped with the side frame.

[0023] In one embodiment, an avoidance groove is provided at the end of the side frame, and the hanging portion includes a first wall body and a second wall body that are opposite to each other along the radial direction of the side frame, the first wall body and the second wall body are connected at one end close to the water inlet, and the side frame is adapted to be inserted between the first wall body and the second wall body; and / or, the first wall body is adapted to be clamped in the avoidance groove.

[0024] In one embodiment, a groove wall of the avoidance groove is provided with a locking protrusion, the first wall body is provided with a buckle opening, and the locking protrusion is locked in the buckle opening.

[0025] In one embodiment, surfaces on different sides of the first wall are correspondingly arranged flush with the outer peripheral wall and / or end wall of the side frame.

[0026] In one embodiment, the water flow driving component further includes a driving body connected to the hanging portion, the driving body is hung on the inner side of the side frame, the hanging portion is engaged with the outer side of the side frame, and the driving surface is formed on the driving body.

[0027] In one embodiment, the driving surface is parallel to the axial direction of the exoskeleton and perpendicular to the circumferential direction of the exoskeleton.

[0028] In one embodiment, the exoskeleton includes a side frame enclosed along the circumferential direction, and the water flow driving component includes a driving body arranged in a conformal manner with the inner circumferential wall of the side frame. The driving body extends in an arc shape along the circumference of the side frame and has a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffle.

[0029] In one embodiment, the pre-filter further comprises a water distributor, which is arranged closer to the water inlet than the water flow driving component, and has a plurality of guide blades distributed circumferentially on the water distributor and inclined relative to the axial direction.

[0030] In one embodiment, the outer frame is provided with a plurality of the water flow driving members, and the plurality of the water flow driving members are distributed at intervals along the circumference of the outer frame.

[0031] The present invention also provides a water use system, which includes the pre-filter as described above.

[0032] The technical solution of the present invention is to sleeve the exoskeleton on the filter assembly, and the exoskeleton is provided with a water flow driving member and is also connected to the impeller body in a transmission manner, wherein the exoskeleton and the impeller body can be rotatably arranged in the shell, so as to realize the synchronous rotation of the exoskeleton and the impeller body. Under the impetus of the water flow, the impeller body rotates in the water filter chamber, thereby pulling the exoskeleton to rotate. At the same time, a driving surface is provided on the water flow driving member, and the driving surface is opposite to or inclined to the flow direction of the water flow in the water filter chamber, and can also be inclined relative to the circumference of the exoskeleton. When the driving surface is driven by the water flow, the water flow driving member can rotate on the exoskeleton The circumference of the frame generates a driving force on the exoskeleton, which in turn causes the exoskeleton to rotate around its axis, that is, around the axial direction of the filter component, so that the kinetic energy of the water flow can be converted into kinetic energy of the exoskeleton rotation through the driving surface. In this way, the water flow driving member and the impeller body can both rotate in the water flow to pull the exoskeleton to rotate, achieving mutual promotion of rotation, ensuring the rotation stability and efficiency of the exoskeleton, so as to fully disturb the water flow in the water filter chamber, avoid impurities from depositing and adhering to the filter component, the exoskeleton and the side walls of the water filter chamber, reduce the possibility of clogging of the filter component, and thus ensure the filtering effect of the filter component. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 A schematic structural diagram of an embodiment of a pre-filter provided by the present utility model;

[0035] Figure 2 for Figure 1 Schematic diagram of the structure of the cooperation between the inner and outer skeleton and the impeller assembly;

[0036] Figure 3 for Figure 2 Schematic diagram of the structure of the meso-exoskeleton;

[0037] Figure 4 for Figure 2 Schematic diagram of the structure of the middle impeller assembly;

[0038] Figure 5 for Figure 2 Schematic diagram of the structure of the middle impeller body and the bottom wall of the mounting base;

[0039] Figure 6 for Figure 2 A schematic structural diagram of the bottom wall of the middle mounting seat;

[0040] Figure 7 for Figure 1 Cross-sectional view of the impeller assembly and reversing structure;

[0041] Figure 8 A partial cross-sectional view of another embodiment of the pre-filter provided by the present invention;

[0042] Figure 9 for Figure 8 A partial enlarged view of point A in the middle;

[0043] Figure 10 for Figure 8 Schematic diagram of the structure of the middle impeller assembly;

[0044] Figure 11 for Figure 1 A schematic diagram of the structure of the middle and outer skeleton lacking some water flow drive components;

[0045] Figure 12 for Figure 11 A partial enlarged view of point B in the middle;

[0046] Figure 13 for Figure 11 Schematic diagram of the structure of the coordination between the inner and outer skeletons and the water distributor;

[0047] Figure 14 for Figure 11 Schematic diagram of the structure of the water flow drive component;

[0048] Figure 15 for Figure 1 A schematic structural diagram of the water flow driving component from another perspective;

[0049] Figure 16 for Figure 1 A partial enlarged view of point C in the middle.

[0050] Description of Figure Numbers:

[0051] 100, housing;

[0052] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet;

[0053] 20, valve head; 201, water inlet; 202, water outlet;

[0054] 30. Filter component;

[0055] 40. Impeller assembly;

[0056] 410, mounting seat; 401, impeller chamber; 421, first avoidance opening; 422, sealing ring; 423, third avoidance opening; 430, supporting boss; 432, clearance groove; 433, limiting groove; 434, ball bearing;

[0057] 440, impeller body; 441, impeller shaft; 442, blades; 443, second protrusion; 446, flat position;

[0058] 50. Exoskeleton; 502. Water flow driving member; 503. Connecting portion; 504. First wall; 505. Second wall; 506. Buckle; 507. Driving body; 508. Water baffle; 509. Driving surface;

[0059] 512, side frame; 513, clamping portion; 514, first protrusion; 515, second avoidance opening; 516, avoidance groove; 517, clamping protrusion; 518, clamping groove; 519, guide slope;

[0060] 60. Water distributor; 601. Guide vane;

[0061] 70. Reversing structure; 710. Reversing bottom shell; 720. Reversing member; 730. Suction cup.

[0062] 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

[0063] 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.

[0064] 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.

[0065] 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.

[0066] In the prior art, the housing of the pre-filter usually includes a valve head and a filter bottle. The valve head is provided with a water inlet and a water outlet. The valve head and the filter bottle enclose a water filter chamber. A filter assembly is provided in the water filter chamber. A cylindrical exoskeleton is formed between the filter assembly and the wall of the water filter chamber. The exoskeleton guides the flow of water to ensure the filtration efficiency of water during the filtration process. At the same time, it also ensures that the flushing effect of the water filter chamber, especially the filter assembly, is improved during the flushing process. However, during the flushing process, although the exoskeleton increases the flow convergence of the water flow, the impact effect of the water flow on the components in the water filter chamber, especially the filter assembly, is low, so that impurities attached to the exoskeleton, the filter assembly, and the wall of the water filter chamber are not thoroughly cleaned. Over time, there are too many stubborn impurities in the water filter chamber, which easily cause the filter assembly to be blocked, thereby reducing the filtering effect.

[0067] Before introducing the technical solution of the present invention, the water filtering process of the pre-filter is first introduced. During the use of the pre-filter, if Figure 1 As shown, tap water first enters the water filter chamber 101 of the housing 100 from the water inlet 201, and is filtered by the filter assembly 30 in the water filter chamber 101. Then, under the action of pressure, the filtered tap water flows out from the water outlet 202 to the water-using equipment. After a period of use, a certain amount of impurities are inevitably deposited in the filter assembly 30 and the water filter chamber 101. At this time, the water outlet 202 can be closed, and the sewage outlet 102 of the housing 100 can be opened to guide the tap water entering from the water inlet 201 to flush the filter assembly 30, the exoskeleton 50 and the water filter chamber 101 to improve the filtering capacity of the filter assembly 30. Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to discharge the large particles previously intercepted, thereby increasing the service life of the pre-filter.

[0068] Pre-filters are used in water systems. For example, whole-house water purification systems typically feature a pre-filter, which filters large particles from tap water. This not only ensures water safety for residents but also extends the lifespan of appliances, prevents clogged household water pipes, and improves residents' health. A pre-filter is the first coarse filtration device in a whole-house water purification system. It is a physical filtration device that primarily intercepts large particles larger than 40 microns, ensuring back-end water safety.

[0069] The utility model provides a pre-filter.

[0070] Please refer to Figure 1 and Figure 2 In one embodiment of the present invention, the pre-filter comprises:

[0071] The housing 100 is provided with a water inlet 201, a water outlet 202 and a water filter chamber 101 communicating with the water inlet 201 and the water outlet 202. The water filter chamber 101 is provided with a filter assembly 30.

[0072] The exoskeleton 50 is rotatably disposed within the water filter chamber 101 and sleeved around the filter assembly 30. The exoskeleton 50 is provided with a water flow driving member 502. The water flow driving member 502 has a driving surface 509. The driving surface 509 is arranged at an angle relative to the circumference of the exoskeleton 50, so that the driving surface 509 can drive the exoskeleton 50 to rotate after being impacted by the water flow; and

[0073] The impeller body 440 is disposed in the water filter chamber 101 , and the impeller body 440 is transmission-connected to the outer frame 50 .

[0074] The technical solution of the present invention is to sleeve the exoskeleton 50 on the filter assembly 30, and the exoskeleton 50 is provided with a water flow driving member 502, and is also connected to the impeller body 440, wherein the exoskeleton 50 and the impeller body 440 are both rotatably arranged in the shell 100, so as to realize the synchronous rotation of the exoskeleton 50 and the impeller body 440. Under the impetus of the water flow, the impeller body 440 rotates in the water filter chamber 101, thereby pulling the exoskeleton 50 to rotate. At the same time, a driving surface 509 is provided on the water flow driving member 502, and the driving surface 509 is relative to or inclined relative to the flow direction of the water flow in the water filter chamber 101, and can also be inclined relative to the circumference of the exoskeleton 50. When the driving surface 509 is driven by the water flow, the water flow driving member 502 can generate a driving force on the exoskeleton 50 in the circumferential direction of the exoskeleton 50, thereby prompting the exoskeleton 50 to rotate around its axis, that is, around the axial direction of the filter component 30, so that the kinetic energy of the water flow can be converted into the kinetic energy of the rotation of the exoskeleton 50 through the driving surface 509. In this way, the water flow driving component 502 and the impeller body 440 can both rotate in the water flow to pull the exoskeleton 50 to rotate, achieving mutual promotion of rotation, ensuring the rotational stability and rotational efficiency of the exoskeleton 50, so as to fully disturb the water flow in the water filter chamber 101, avoid impurities from being deposited and attached to the filter component 30, the exoskeleton 50 and the side walls of the water filter chamber 101, reduce the possibility of clogging of the filter component 30, and thus ensure the filtering effect of the filter component 30.

[0075] It should be noted that the side of the exoskeleton 50 facing the filter assembly 30 is also equipped with bristles. During the rotation of the exoskeleton 50, the bristles scrub the surface of the filter assembly 30, improving the cleanliness and cleaning efficiency of the rinse. At the same time, it also prevents the accumulation of impurities on the surface of the filter assembly 30, which may affect the filtration effect. Specifically, the extension direction and length of the bristles are adapted to the distribution of the filter screen on the filter assembly 30 and the maximum distance between the exoskeleton 50 and the filter assembly 30, which not only avoids interference with the filtration of the filter assembly 30 but also ensures the filtration effect.

[0076] In addition, the pre-filter has a filtering mode for normal use and a cleaning mode for occasional use. In the filtering mode, only the water inlet 201 and the water outlet 202 are connected to the pre-filter, so that the filter component 30 pre-filters the water. In the cleaning mode, water flows into the water filter chamber 101 from one of the water inlet 201 and the water outlet 202. Generally speaking, it flows into the water inlet 201 and flows out of the water filter chamber 101 from the sewage outlet 102. During this process, the water flow can impact the impeller body 440, causing the impeller body 440 to rotate, thereby pulling the exoskeleton 50 to rotate, so as to flush impurities on the filter component 30, avoid clogging of the filter component 30, and improve the filtering effect; regardless of whether it is filtering mode or cleaning mode, the water flow in the water filter chamber 101 can impact the driving surface 509. Under the guidance of the driving surface 509, the circumference of the exoskeleton 50 is pushed, thereby realizing the rotation of the exoskeleton 50 itself, so as to avoid impurities adhering to the filter component 30, avoid clogging of the filter component 30, and improve the filtering effect. The directional indications such as upper, lower, and top in this solution refer to the general use status of the pre-filter, i.e. Figure 11 For reference, similarly, for the axial, circumferential and radial directions referred to in this solution, Figure 11 The outer skeleton 50 in the cylindrical shape is used as a reference, wherein the upper and lower directions are parallel to the axial direction. If the specific posture changes, the directional indication will also change accordingly.

[0077] In one embodiment, please refer to Figure 2 The water flow drive member 502 and the impeller body 440 are located at opposite axial ends of the exoskeleton 50. It will be appreciated that when the pre-filter is in filtering or flushing mode, the drive surface 509 on the water flow drive member 502 can pull the exoskeleton 50 to rotate, and the impeller body 440 also rotates synchronously, creating a rotational balance at both axial ends of the exoskeleton 50, preventing eccentric rotation of the exoskeleton 50 and ensuring rotational stability of the exoskeleton 50. This, in turn, allows for uniform cleaning of impurities from the surface of the filter assembly 30 along the axial direction of the filter assembly 30. In particular, during the flushing process, the impeller body 440 and the water flow drive member 502 are both impacted by the water flow, providing rotational driving force at both ends of the exoskeleton 50, effectively improving the rotational efficiency of the exoskeleton 50. This prevents impurities from adhering to the filter assembly 30 or flushing them from the surface of the filter assembly 30, thereby ensuring the filtration effectiveness of the pre-filter. Of course, in other embodiments, the water flow drive member 502 or the impeller assembly 40 can also be located in the middle of the exoskeleton 50.

[0078] Further, in this embodiment, please continue to refer to Figure 2The water drive element 502 is disposed at the end of the exoskeleton 50 near the water inlet 201, and the impeller body 440 is disposed at the end of the exoskeleton 50 away from the water inlet 201. Water first flows from the water inlet 201 to the exoskeleton 50, then flows within the water filter chamber 101 to the end of the exoskeleton 50 away from the water inlet 201, and then flows through the filter assembly 30 mounted on the exoskeleton 50 to the water outlet 202. During this process, the water first pushes the drive surface 509, which in turn causes the exoskeleton 50 to rotate, thereby agitating the water flow and preventing impurities from settling and adhering to the filter assembly 30. Without loss of generality, a sewage outlet 102 is opened at the lower part of the shell 100, and the impeller body 440 is located between the exoskeleton 50 and the sewage outlet 102. In the flushing mode, the water flow still flows from the water inlet 201 to the exoskeleton 50 first, and then flows to the end of the exoskeleton 50 connected to the impeller body 440, and flows out from the sewage outlet 102 after driving the impeller body 440 to rotate. In this process, the driving surface 509 of the water flow driving member 502 drives the exoskeleton 50 to rotate on the side close to the water inlet 201, and the impeller body 440 drives the exoskeleton 50 to rotate on the side away from the water inlet 201, thereby improving the rotation efficiency of the exoskeleton 50 in the flushing mode and ensuring the flushing effect. The water flow drive member 502 is disposed on the exoskeleton 50, and the exoskeleton 50 can be close to the water inlet 201, so that the driving surface 509 can obtain a water flow impact with greater kinetic energy. The impeller body 440 is disposed away from the water inlet 201, and can rely on the axial flow of the water flow to convert it into circumferential rotation of the exoskeleton 50, thereby ensuring the rotation efficiency of the exoskeleton 50 and improving the compactness of the pre-filter. Of course, in other embodiments, the water flow drive member 502 can also be disposed at the end of the exoskeleton 50 away from the water inlet 201, and the impeller body 440 can be disposed at the end of the exoskeleton 50 close to the water inlet 201.

[0079] In one embodiment, please refer to Figure 1 The housing 100 is further provided with a sewage outlet 102 connected to the water filter chamber 101. The sewage outlet 102 is connected to the water filter chamber 101 and is located at the end of the impeller body 440 away from the outer frame 50. It can be understood that by providing the sewage outlet 102 at the end of the impeller body 440 axially away from the outer frame 50, separate sewage discharge in the flushing mode is achieved to ensure the cleanliness of each component in the water filter chamber 101. Among them, water flows from the water flow driving member 502 to the outer frame 50, and then flows from the outer frame 50 to the impeller body 440, and then flows from the impeller body 440 toward the sewage outlet 102. The flow of water simultaneously drives the water flow driving member 502 and the impeller body 440 to rotate, thereby improving the rotation efficiency of the outer frame 50 to ensure the flushing effect.

[0080] Further, in this embodiment, please refer to Figure 2 and Figure 4The pre-filter also includes a mounting seat 410, which is disposed in the water filter chamber 101 and is located between the exoskeleton 50 and the sewage outlet 102. An impeller chamber 401 is disposed within the mounting seat 410, and an impeller body 440 is rotatably disposed in the impeller chamber 401. The mounting seat 410 positions the impeller body 440 within the impeller chamber 401 and provides support for the impeller body 440. Furthermore, the impeller body 440 provides support for the exoskeleton 50 through the impeller body 440, thereby ensuring the stability of the exoskeleton 50 and the impeller body 440 within the water filter chamber 101. Furthermore, the mounting seat 410 can guide water flow from the water filter chamber 101 to the impeller chamber 401, thereby driving the impeller body 440 to rotate. The water then flows out of the impeller chamber 401 toward the sewage outlet 102, achieving a water diversion effect. This allows the impeller body 440 to be effectively driven by the water flow, thereby ensuring the rotational stability of the exoskeleton 50.

[0081] In one embodiment, please refer to Figures 2 to 4 A first avoidance opening 421 is provided on the side of the mounting seat 410 facing the outer frame 50, the impeller body 440 includes an impeller shaft 441, and a clamping portion 513 is provided on the side of the outer frame 50 facing the mounting seat 410, and the impeller shaft 441 is clamped with the clamping portion 513 through the first avoidance opening 421. The impeller shaft 441 is connected to the clamping part 513 at the position of the first avoidance port 421. The impeller shaft 441 can be extended from the first avoidance port 421 and clamped to the clamping part 513, or the clamping part 513 can be extended into the impeller chamber 401 through the first avoidance port 421 and clamped to the impeller shaft 441. In this way, the impeller shaft 441 is connected to the clamping part 513 by clamping, so as to realize the clamping connection between the impeller body 440 and the exoskeleton 50, which not only facilitates the connection operation between the impeller body 440 and the exoskeleton 50, but also ensures the connection stability between the impeller body 440 and the exoskeleton 50, so that the impeller body 440 can pull the exoskeleton 50 to rotate stably, thereby ensuring the reliability of flushing and cleaning the filter component 30. Without loss of generality, after the impeller shaft 441 and the clamping portion 513 are engaged, they are relatively fixed in the circumferential direction, allowing the impeller body 440 and the exoskeleton 50 to rotate coaxially and synchronously. Of course, after the impeller shaft 441 and the clamping portion 513 are engaged, the two can also be fixed in the axial direction to prevent the clamping relationship between the exoskeleton 50 and the impeller body 440 from failing during flushing. The impeller shaft 441 can be formed separately and then assembled to form the impeller body 440, or it can be integrally formed with the impeller body 440. In other embodiments, the exoskeleton 50 and the impeller body 440 can also be bonded, melted, etc.

[0082] Further, in this embodiment, please refer to Figures 2 to 4The clamping portion 513 is configured as a plurality of first protrusions 514 distributed in a circumferential manner. A plurality of second protrusions 443 are provided at one end of the impeller shaft 441 close to the outer frame 50. The plurality of second protrusions 443 are distributed along the circumference of the impeller shaft 441, and a first protrusion 514 is clamped between two adjacent second protrusions 443. It can be understood that the plurality of first protrusions 514 or the plurality of second protrusions 443 are each arranged in a ring shape, and the groove between two adjacent second protrusions 443 is adapted to fit a first protrusion 514, and the groove between two adjacent first protrusions 514 is adapted to fit a second protrusion 443. In this way, the clamping stability of the first protrusion 514 and the second protrusion 443 is ensured. At the same time, during the rotation of the impeller shaft 441, the force between the first protrusion 514 and the second protrusion 443 is stable, and the transmission between the impeller body 440 and the outer frame 50 can be timely and efficiently carried out, thereby ensuring cleaning efficiency. In addition, multiple first protrusions 514 and multiple second protrusions 443 are clamped together. When the connection between some of the first protrusions 514 and the second protrusions 443 fails, the connection between the other first protrusions 514 and the second protrusions 443 can still ensure the clamping stability between the impeller body 440 and the outer skeleton 50.

[0083] In one embodiment, please refer to Figure 7The pre-filter also includes a reversing structure 70, the impeller body 440 includes a hollow impeller shaft 441, the reversing structure 70 includes a reversing bottom shell 710 and a reversing member 720, the reversing bottom shell 710 is arranged on the side of the mounting seat 410 away from the outer frame 50, and the reversing member 720 passes through the impeller shaft 441 from the reversing bottom shell 710 and can rotate relative to the impeller body 440. It should be noted that the reversing structure 70 is used to control the switching of the pre-filter between the flushing mode and the filtering mode. The reversing member 720 has a reversing shaft passing through the impeller shaft 441 and a suction cup 730 in the cavity enclosed by the reversing chassis and the mounting seat 410, wherein the suction cup 730 is intercepted between the impeller chamber 401 and the sewage outlet 102. The suction cup 730 can be opened by pushing the reversing shaft from the side of the exoskeleton 50 to connect the impeller chamber 401 and the sewage outlet 102, or the sewage discharge component at the sewage outlet 102 can be opened to conduct the sewage outlet 102 outward, thereby promoting the flow of water toward the sewage outlet 102 to flush the interception of the impeller chamber 401 by the suction cup 730, realize flushing and sewage discharge, and promote water flow to drive the impeller body 440 and the exoskeleton 50 to rotate, thereby improving the flushing effect. In this way, the impeller shaft 441 is configured as a hollow cylinder for the reversing member 720 to pass through, which simplifies the reversing structure 70 and improves the compactness of the pre-filter. In addition, the reversing bottom shell 710 protects the suction cup 730, ensuring the smoothness of the suction cup 730 interception and conduction switching, while also providing support for the mounting seat 410 and the exoskeleton 50, thereby providing space for the suction cup 730 to move. Of course, in other modes, the impeller shaft 441 can also be designed as a solid shaft. The switching between the flushing mode and the filtering mode can be achieved by setting a negative pressure chamber at the sewage outlet 102, controlling the conduction relationship between the negative pressure chamber and the impeller chamber 401, and realizing the guidance of flushing and sewage discharge.

[0084] In one embodiment, please refer to Figure 6 and Figure 7A third avoidance opening 515 is provided on the side of the mounting seat 410 facing the reversing bottom shell 710, and the reversing member is passed through the third avoidance opening 515. A supporting boss 430 is provided on the periphery of the third avoidance opening 515 along the axial direction of the reversing member 720 toward the impeller shaft 441. The outer diameter of the supporting boss 430 is smaller than the outer diameter of the impeller shaft 441, and the supporting boss 430 abuts against the end of the impeller shaft 441. 4. The cam 440 is provided with a plurality of support members 441 and 442, and the support members 442 are provided with a plurality of support members 443 and 4444. The support members 443 are provided with a plurality of support members 443 and 4444 of the impeller cavity 401. The support members 443 are provided with a plurality of support members 443 and 4444 of the impeller cavity 401. The support members 443 are provided with a plurality of support members 443 and 4444 of the impeller cavity 401. The support members 433 and 434 are provided with a plurality of support members 443 and 4444 of the impeller cavity 401. The support members 433 and 4344 of the impeller cavity 401 are provided with a plurality of support members 443 and 4444 of the impeller cavity 401. In addition, the support boss 430 abuts against the impeller shaft 441 and does not interfere with the blades 442 , thereby avoiding resistance to the blades 442 during the rotation of the impeller body 440 , thereby ensuring smooth rotation of the impeller body 440 .

[0085] In another embodiment, please refer to Figures 8 to 10 The outer frame 50 has a recessed engaging groove 518 on one side facing the mounting seat 410. The impeller body 440 includes an impeller shaft 441. The impeller shaft 441 has at least one flattened portion 446 arranged circumferentially. The impeller shaft 441 is inserted into the engaging groove 518, and the flattened portion 446 fits against the side groove wall of the engaging groove 518. It can be understood that, with reference to the description of the engaging portion 513 provided on the outer frame 50, the engaging groove is formed in the engaging portion 513. The engaging portion 513 has an axial recessed engaging groove 518. The engaging groove 518 is fitted or interference-fitted with the end of the impeller shaft 441. Flattened portions 446 are arranged circumferentially between the engaging groove 518 and the impeller shaft 441. During the rotation of the impeller body 440, the flattened portion 446 can prevent the two from sliding against each other, thereby pulling the outer frame 50 to rotate. In addition, the impeller shaft 441 and the engaging groove 518 have an axially inserted portion, which reduces the distance between the outer skeleton 50 and the blades 442 and improves the efficiency of power transmission.

[0086] Specifically, in this embodiment, please refer to Figures 8 to 10On the side of the mounting base 410 facing the exoskeleton 50, the mounting base 410 has a recessed clearance groove 432 surrounding the first relief opening 421. The clamping portion 513 is protruding from the side of the exoskeleton 50 facing the mounting base 410 and is received in the recessed clearance groove 432 on the outer periphery of the impeller shaft 441. It will be appreciated that the recessed clearance groove 432 is recessed from the side of the mounting base 410 facing the exoskeleton 50 toward the impeller chamber 401 and accommodates the clamping portion 513. This further reduces the distance between the exoskeleton 50 and the mounting base 410, thereby improving the compactness of the pre-filter and reducing the distance between the exoskeleton 50 and the blades 442, thereby improving power transmission efficiency. Of course, the diameter of the first relief opening 421 can also allow the impeller shaft 441 and the clamping portion 513 to rotate, allowing the clamping portion 513 to be partially inserted into the impeller chamber 401.

[0087] In one embodiment, please refer to Figures 8 to 10 The impeller body 440 includes an impeller shaft 441. Within the impeller cavity 401, a retaining groove 433 is recessed on the cavity wall of the mounting seat 410 away from the outer frame 50. The end of the impeller shaft 441 away from the outer frame 50 is rotatably inserted into the retaining groove 433. Referring to the above description of the clamping portion 513 and the first avoidance opening 421, the end of the impeller shaft 441 away from the outer frame 50 is the end of the impeller shaft 441 away from the clamping portion 513, and the cavity wall of the impeller cavity 401 away from the outer frame 50 is the cavity wall of the impeller cavity 401 opposite to the first avoidance opening 421. The end of the impeller shaft 441 is axially rotatably inserted into the retaining groove 433. The retaining groove 433 cooperates with the clamping groove 518 to respectively retain the two ends of the impeller shaft 441, thereby preventing the impeller body 440 from rotating eccentrically and ensuring the stability of the impeller body 440 pulling the outer frame 50 to rotate. Without loss of generality, the end of the impeller shaft 441 inserted into the limiting groove 433 is smaller than the maximum diameter of the impeller shaft 441, and appears as a convex column protruding from the end of the impeller shaft 441. In this way, the impeller shaft 441 has a step surface on the side of the cavity wall where the limiting groove 433 is located, which abuts against the cavity wall. It not only has good stability in circumferential rotation, but also can limit the impeller body 440 in the axial direction to avoid axial vibration of the impeller body 440.

[0088] Further, in this embodiment, please refer to Figures 8 to 10The mounting base 410 is further provided with a ball bearing 434, which is disposed at the bottom of the retaining groove 433 and in rolling contact with the impeller shaft 441. It should be noted that the ball bearing 434 can freely rotate and roll within the retaining groove 433. During the rotation of the impeller body 440, rolling friction occurs between the ball bearing 434 and the impeller shaft 441, reducing the friction experienced by the impeller shaft 441, thereby improving the smoothness and efficiency of the rotation of the impeller body 440. Furthermore, the provision of the ball bearing 434 also reduces the length of the protrusion of the impeller shaft 441 inserted into the retaining groove 433, increasing the protrusion's bending resistance, ensuring that the impeller shaft 441 can withstand the impact of water flow, thereby improving the rotational stability of the impeller body 440. Of course, in other embodiments, the surface where the impeller shaft 441 and the retaining groove 433 contact each other can also be configured to be relatively smooth, so as to provide rotational support through sliding friction.

[0089] In one embodiment, please refer to Figure 2 、 Figure 7 and Figure 8 A sealing ring 422 is provided on the outer periphery of the mounting seat 410, and the sealing ring 422 is in sealing contact between the mounting seat 410 and the inner wall of the filter bottle 10. The impeller chamber 401 is located on the side of the sealing ring 422 close to the outer frame 50. It should be noted that the impeller chamber 401 has a certain extension posture in the axial direction. Taking the outer frame 50 and the impeller assembly 40 as an example of being distributed up and down, the orientation is explained. On the side of the impeller chamber 401 close to the sewage outlet 102, that is, at the lower part of the mounting seat 410, the sealing ring 422 is arranged around the outer periphery of the mounting seat 410 so that the impeller chamber 401 is relatively located above the sealing ring 422. In this way, there are more optional conductive positions between the impeller chamber 401 and the water filter chamber 101, ensuring the connectivity between the water filter chamber 101 and the impeller chamber 401, and improving the efficiency of flushing and drainage. In addition, the sealing ring 422 is located at the bottom, supported by the bottom, and the gravity of the mounting base 410 presses the sealing ring 422 between the water filter chamber 101, thereby ensuring the sealing between the mounting base 410 and the water filter chamber 101. This ensures that during flushing and drainage, water can only flow from the impeller chamber 401 to the sewage outlet 102, thereby ensuring that the water wheel body can obtain greater power and improve cleaning efficiency. Of course, in other embodiments, the sealing ring 422 can also be located on the side of the impeller chamber 401 close to the outer frame 50.

[0090] In one embodiment, please continue to refer to Figure 11 、 Figure 12 and Figure 14The exoskeleton 50 includes circumferentially enclosed side frames 512, and the water flow drive member 502 is snap-fitted to the ends of the side frames 512. The water flow drive member 502 is snap-fitted to the ends of the side frames 512, enabling separate molding of the side frames 512 and the water flow drive member 502, thereby improving molding probability and convenience. The side frames 512 and the water flow drive member 502 are snap-fitted together, making the connection operation convenient. At the same time, the water flow drive member 502 can also be maintained stable at the ends of the side frames 512, thereby improving production efficiency. Of course, in other embodiments, the water flow drive member 502 can also be connected to the side frames 512 by screwing, melting, or integral molding, or the water flow drive member 502 can be snap-fitted to the axial center of the side frames 512.

[0091] Specifically, in this embodiment, please refer to Figure 11 、 Figure 12 and Figure 14 The exoskeleton 50 is provided with a plurality of water flow driving members 502, and the plurality of water flow driving members 502 are spaced apart along the circumference of the exoskeleton 50. It can be understood that the plurality of water flow driving members are spaced apart at the ends of the side frames 512 around the circumference of the exoskeleton 50. In this way, the plurality of driving surfaces 509 distributed circumferentially of the exoskeleton 50 tend to be uniform, thereby balancing the driving force exerted on the exoskeleton 50 in the circumferential direction, so that the exoskeleton 50 can rotate at a uniform speed, ensuring the cleaning effect on the filter assembly 30. Without loss of generality, in this embodiment, the water flow driving member 502 is provided with a plurality of driving surfaces 509, and the plurality of driving surfaces 509 are evenly distributed on the water flow driving member 502 along the circumference of the exoskeleton 50. The plurality of water flow driving members 502 are evenly distributed circumferentially on the side frames 512, thereby ensuring that the driving surfaces 509 are evenly distributed circumferentially on the side frames 512, so as to ensure the rotational stability of the exoskeleton 50. Of course, in other embodiments, the plurality of water flow driving members 502 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.

[0092] In one embodiment, please refer to Figure 1 and Figure 13 、 Figure 16The pre-filter also includes a water distributor 60. The water distributor 60 is arranged closer to the water inlet 201 than the water flow driving member 502. The water distributor 60 has a plurality of guide blades 601 distributed circumferentially and tilted relative to the axial direction. It can be understood that the water distributor 60 is between the water flow driving member 502 and the water inlet 201, and the water flow from the water inlet 201 must first pass through the water distributor 60 and then flow to the water flow driving member 502. The water distributor 60 has a plurality of guide blades 601 distributed circumferentially around the filter assembly 30. The guide blades 601 extend axially tilted relative to the filter assembly 30, and a relatively axially tilted flow channel is formed between two adjacent guide blades 601. There are a plurality of such flow channels in the circumferential direction of the filter assembly 30. In addition, the guide blades The inclination direction of the blade 601 is opposite to or inclined opposite to the driving surface 509. In this way, under the drainage action of the guide blade 601, the flow direction of the water flowing through the above-mentioned flow channel can impact the driving surface 509 vertically or nearly vertically, which not only ensures the size of the driving force for driving the exoskeleton 50 to rotate so that the exoskeleton 50 can rotate stably, but also, while ensuring that the driving surface 509 can drive the exoskeleton 50 to rotate in the circumferential direction of the side frame 512, the inclination degree of the driving surface 509 can also be flexibly adjusted to adapt to various water flow environments. It should be noted that, on the side of the water distributor 60 close to the water inlet 201, the water flow can fully cover the water distributor 60, so that any guide blade 601 can adjust the direction of the water flow, and the water distributor 60 is fixedly connected to the shell 100. Correspondingly, there is a gap between the water distributor 60 and the water drive member 502 to ensure that the water flow guided by the guide blade 601 can impact the corresponding drive surface 509. The water drive member 502, like the side frame 512, can rotate relative to the shell 100 in the water filter chamber 101. Specifically, the water distributor 60 causes the water flow to flow in a circumferential vortex along the axial direction of the filter assembly 30, and the drive surface 509 extends along the axial direction of the filter assembly 30, thereby generating a maximized circumferential driving force on the exoskeleton 50, thereby improving the rotation rate of the exoskeleton 50 and the effect of cleaning the filter assembly 30.

[0093] Regarding the connection between the water flow driving member 502 and the side frame 512, in this embodiment, please refer to Figure 11 、 Figure 12 and Figure 14The water flow driving member 502 includes a hooking portion 503, which is hooked to the end of the side frame 512 and is engaged with the side frame 512. It is understood that the water flow driving member 502 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 503 is hooked to the side frame 512, the water flow driving member 502 and the side frame 512 are engaged. Here, the hooking portion 503 can be engaged with the side frame 512, or other parts of the water flow driving member 502 can be engaged with the side frame 512. This hooking connection provides a positioning reference for the connection between the water flow driving member 502 and the side frame 512, simplifying the connection between the water flow driving member 502 and the side frame 512. In addition, after the hooking portion 503 is engaged with the side wall, it forms a radial limit for the water flow driving member 502, preventing the water flow driving member 502 from moving radially relative to the side frame 512. Of course, in other embodiments, the water flow driving member 502 can also be connected to the side wall by plugging, or by turning a knob.

[0094] Further, in this embodiment, please refer to Figure 11 、 Figure 12 and Figure 14 The end of the side frame 512 is provided with an avoidance groove 516, and the hanging portion 503 is hung in the avoidance groove 516. The hanging portion 503 is aligned with the avoidance groove 516, and the avoidance groove 516 provides a positioning reference for the hanging portion 503 to facilitate the connection between the water flow driving member 502 and the side wall. At the same time, during the rotation of the exoskeleton 50, the avoidance groove 516 can also limit the hanging portion 503 in the circumferential direction, preventing the water flow driving member 502 from sliding in the circumferential direction, so that the driving surface 509 can promptly and stably drive the exoskeleton 50 to rotate after being impacted by the water flow. Without loss of generality, the avoidance groove 516 can be formed on the outer wall of the side frame 512 and pass through the end of the side frame 512, or the avoidance groove 516 can be formed on the outer wall and end wall of the side frame 512, forming a virtual L-shape, or the avoidance groove 516 can be formed on the inner wall of the side frame 512 but not pass through the end of the side frame 512, and the hooking portion 503 can be provided with a locking protrusion corresponding to the avoidance groove 516, and the locking protrusion can be adapted to be locked in the avoidance groove 516. Of course, in other embodiments, a protrusion can also be provided on the end of the side frame 512, and the hooking portion 503 can be provided with a sliding groove, so that when the hooking portion 503 is hooked to the end of the side frame 512, the protrusion slides into the sliding groove.

[0095] Specifically, in this embodiment, please refer to Figure 12 and Figure 14The hanging portion 503 includes a first wall body 504 and a second wall body 505 that are radially spaced relative to each other along the side frame 512. The first wall body 504 and the second wall body 505 are connected to one end close to the water inlet 201. The end of the side frame 512 is adapted to be inserted between the first wall body 504 and the second wall body 505, or the first wall body 504 is adapted to be clamped in the avoidance groove 516, or the end of the side frame 512 is adapted to be inserted between the first wall body 504 and the second wall body 505, and the first wall body 504 is also adapted to be clamped in the avoidance groove 516. It can be understood that the gap between the first wall body 504 and the second wall body 505 is circumferentially continuous so that the end of the side frame 512 is inserted between the first wall body 504 and the second wall body 505, wherein the first wall body 504 can be adapted to be inserted into the avoidance groove 516, and the second wall body 505 abuts against the inner side of the side frame 512, so that the side frame 512 is clamped between the first wall body 504 and the second wall body 505, or the first wall body 504 can be adapted to be snap-fitted into the avoidance groove 516, and the second wall body 505 does not abut against the inner side of the side frame 512. Furthermore, in the direction near the water inlet 201, the first wall 504 and the second wall 505 are connected. This connection is part of the first wall 504 and is adapted to be mounted in the avoidance groove 516 in the axial direction of the side frame 512. Accordingly, the avoidance groove 516 includes both a portion recessed on the outer periphery of the side frame 512 and a portion recessed at the end of the side frame 512, and the two portions are connected, that is, the avoidance groove 516 is L-shaped, and the first wall 504 is also L-shaped. In this way, the hanging portion 503 is stably connected to the end of the side frame 512, thereby ensuring the stability and convenience of the connection between the water flow driving member 502 and the side wall 512.

[0096] In one embodiment, please refer to Figure 12 and Figure 14 , surfaces on different sides of the first wall 504 are correspondingly flush with the outer peripheral wall and / or end wall of the side frame 512. It should be noted that the outer peripheral wall of the side frame 512 is a cylindrical circular side wall, and the end wall of the side frame 512 is an end face parallel to the cross section of the side frame 512. In this way, the first wall body 504 is perpendicular to the radial direction of the side frame 512 and parallel to the outer wall of the circumference of the side frame 512 and is arranged flush with the outer peripheral wall of the side frame 512, so that the outer periphery of the exoskeleton 50 at the connection between the water flow driving member 502 and the side frame 512 is flush, avoiding the interference of the rotation process of the exoskeleton 50 with the shell 100. Similarly, the outer wall of the first wall body 504 parallel to the cross section of the side frame 512 is arranged flush with the end wall of the side frame 512, so that the wall surface of the exoskeleton 50 facing the water distributor 60 or the water inlet 201 is flush, avoiding the interference of the rotation process of the exoskeleton 50 with the shell 100 or the water distributor 60, thereby ensuring the rotation stability of the exoskeleton 50 and the compactness of the pre-filter. Of course, in other embodiments, the outer wall of the first wall 504 may also be convex or concave relative to the outer peripheral wall or end wall of the side frame 512 .

[0097] Regarding the clamping structure of the water flow driving member 502 and the side frame 512, in this embodiment, please refer to Figure 11 and Figure 12 The groove wall of the avoidance groove 516 is provided with a latching protrusion 517, and the first wall body 504 is provided with a latching opening 506, and the latching protrusion 517 is latched in the latching opening 506. It is understood that the latching protrusion 517 can be provided on the groove bottom wall of the avoidance groove 516 or on the groove side wall of the avoidance groove 516, and the latching opening 506 is opened radially or circumferentially from the wall body. In this way, when the first wall body 504 is adapted to be installed in the avoidance groove 516, the latching protrusion 517 is also latched in the corresponding latching opening 506, so that the hanging portion 503 is latched to the side frame 512, realizing the latching connection between the water flow driving member 502 and the side frame 512, and ensuring the connection stability of the water flow driving member 502 and the side frame 512. Without loss of generality, a corner of the latching protrusion 517 is provided as a guide slope 519, which is provided near the water inlet 201. That is, during the hooking process of the hooking portion 503, the guide slope 519 can guide the first wall 504 to deform. After the latching protrusion 517 corresponds to the buckle opening 506, the first wall 504 elastically recovers and fits into the avoidance groove 516, thereby improving the ease of hooking the hooking portion 503 to the side wall. Alternatively, the corner of the latching protrusion 517 can remain square, and the guide slope 519 can be provided on the first wall 504, and on the side of the buckle opening 506 away from the water inlet 201, to guide the deformation of the first wall 504 and ensure smooth hooking of the latching protrusion 517 and the buckle opening 506. Of course, in other embodiments, a groove may be formed on the first wall 504, and the latch 517 may be locked in the groove, or the latch 517 may be set on the first wall 504, and the groove or buckle 506 may be set on the groove wall of the avoidance groove 516, or the latching structure between the water flow driving component 502 and the side frame 512 may be set at a position of the water flow driving component 502 other than the hanging part 503.

[0098] Further, in this embodiment, please refer to Figures 11 to 14The water flow driving member 502 further includes a driving body 507 connected to the attachment portion 503. The driving body 507 is mounted on the inner side of the side frame 512. The attachment portion 503 engages the outer side of the side frame 512, and a driving surface 509 is formed on the driving body 507. Without loss of generality, the gap between the exoskeleton 50 and the housing 100 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 driving body 507 with the driving surface 509 is positioned 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 driving surface 509, thereby ensuring the rotational stability and reliability of the exoskeleton 50. Furthermore, since the drive surface 509 is disposed on the drive body 507, the drive body 507 inevitably maintains good flatness around the circumference of the side frame 512. Positioning the drive body 507 inside the side frame 512 ensures the flatness of the outer side of the exoskeleton 50, prevents the housing 100 from interfering with the rotation of the exoskeleton 50, and ensures that the drive surface 509 receives sufficient water flow impact. Simultaneously, the attachment portion 503 is positioned outside the side frame 512, and the drive body 507 is positioned inside the side frame 512. This balances the forces acting on the water flow drive element 502 in the inward and outward directions of the side frame 512, thereby ensuring a stable connection between the water flow drive element 502 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 507 may also be positioned outside the side frame 512.

[0099] In one embodiment, please refer to Figures 11 to 14 , the driving surface 509 is parallel (parallel or quasi-parallel) to the axial direction of the outer frame 50. It can be understood that the driving surface 509 is distributed circumferentially on the side frame 512, and can refer to the above-mentioned arrangement of the water distributor 60, with the guiding effect of the guide vane 601 on the water flow, guiding the water flow to impact the driving surface 509, or, a drainage structure is set on the channel wall between the water inlet 201 and the water flow driving member 502, so that the water flow is diverted in a vortex shape along the axial direction of the filter assembly 30, and then can directly impact the driving surface 509 parallel to the axial direction of the outer frame 50, so that the water flow driving member 502 obtains a larger water flow impact force, improves the rotation speed or rotation efficiency of the outer frame 50, prevents impurities from adhering to the filter assembly 30, ensures the cleanliness of the filter assembly 30, and improves the filtration efficiency of the filter assembly 30 for the water flow. Of course, in other embodiments, the driving surface 509 can also be inclined relative to the axial direction of the outer frame 50, or, relative to the radial direction of the side frame 512.

[0100] In one embodiment, please refer to Figures 12 to 14The exoskeleton 50 includes a circumferentially enclosed side frame 512. The water flow drive member 502 includes a drive body 507 configured to conform to the inner circumferential wall of the side frame 512. The drive body 507 extends in an arc shape along the circumference of the side frame 512 and is provided with a plurality of water baffles 508 spaced apart at intervals. A drive surface 509 is formed on the water baffles 508. Without loss of generality, the water baffles 508 protrude from the drive body 507. The drive surface 509 is formed on the side wall of the water baffle 508 along the circumference of the side frame 512, so that the drive surface 509 has a certain radial dimension, ensuring that the drive surface 509 is stably impacted by the water flow. At the same time, the drive body 507 extends in an arc shape along the inner circumference of the side frame 512. The plurality of water baffles 508 are spaced apart in the extension direction of the drive body 507 to evenly distribute the driving force along the circumference of the side frame 512, thereby ensuring the stability of the rotation of the exoskeleton 500. Furthermore, the drive body 507 is conformally arranged on the inner circumferential wall of the side frame 512, and the two fit closely together. When the drive body 507 is subjected to force, the inner wall of the side frame 512 can provide sufficient stable support for the drive body 507, thereby effectively pulling the side frame 512 to rotate, avoiding shaking between the water flow driving member 502 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 507 can also be provided with a recessed drive groove, with the side groove wall of the drive groove configured as the drive surface 509.

[0101] The present invention also proposes a water use system, which includes the aforementioned pre-filter. The specific structure of the pre-filter refers to the above-mentioned embodiment. Since the present water use system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0102] Among them, the water use system at least includes relevant components from the pre-filter to the water use end. For example, the water use system may include household appliances such as water heaters, dishwashers, and water dispensers, and may also include accessories such as water pipes for domestic water use throughout the house.

[0103] 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: The housing is provided with a water inlet, a water outlet and a water filter cavity communicating with the water inlet and the water outlet, wherein a filter assembly is provided in the water filter cavity; An exoskeleton is rotatably disposed in the water filter cavity and sleeved outside the filter assembly. The exoskeleton is provided with a water flow driving member, and the water flow driving member has a driving surface. The driving surface 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. as well as The impeller body is arranged in the water filtering chamber, and the impeller body is transmission-connected to the outer frame.

2. The prefilter according to claim 1, wherein The water flow driving component and the impeller body are respectively arranged at two axial ends of the outer frame.

3. The prefilter according to claim 2, wherein: The water flow driving component is arranged at the end of the outer frame close to the water inlet, and the impeller body is arranged at an end of the outer frame away from the water inlet.

4. The prefilter according to claim 1, wherein The shell is further provided with a sewage outlet communicated with the water filter cavity, and the sewage outlet is located at one end of the impeller body away from the outer frame.

5. The pre-filter according to claim 4, characterized in that The pre-filter further comprises a mounting seat, which is arranged in the water filter cavity and located between the outer frame and the sewage outlet. An impeller cavity is arranged in the mounting seat, and the impeller body is rotatably arranged in the impeller cavity.

6. The prefilter according to claim 5, characterized in that The mounting seat is provided with a first avoidance opening on a side facing the outer frame, the impeller body includes an impeller shaft, the outer frame is provided with a clamping portion on a side facing the mounting seat, and the impeller shaft passes through the first avoidance opening and is clamped in the clamping portion.

7. The prefilter according to claim 6, wherein: The clamping portion is configured as a plurality of first protrusions distributed in a circumferential manner, and a plurality of second protrusions are provided at one end of the impeller shaft close to the outer skeleton. The plurality of second protrusions are distributed along the circumference of the impeller shaft, and one first protrusion is clamped between two adjacent second protrusions.

8. The pre-filter according to claim 6, wherein: On the side of the mounting seat facing the outer frame, the mounting seat is recessed with a clearance groove around the first avoidance opening, the clamping portion is protruded on the side of the outer frame facing the mounting seat, and is accommodated in the clearance groove on the outer periphery of the impeller shaft.

9. The prefilter according to claim 5, wherein: The pre-filter also includes a reversing structure, the impeller body includes a hollow impeller shaft, the reversing structure includes a reversing bottom shell and a reversing member, the reversing bottom shell is arranged on the side of the mounting seat away from the outer frame, the reversing member passes through the impeller shaft from the reversing bottom shell, and can rotate relative to the impeller body.

10. The pre-filter according to claim 9, characterized in that A third avoidance opening is provided on the side of the mounting seat facing the reversing bottom shell, the reversing member is passed through the third avoidance opening, and a supporting boss is provided on the periphery of the third avoidance opening along the axial direction of the reversing member toward the impeller shaft, the outer diameter of the supporting boss is smaller than the outer diameter of the impeller shaft, and the supporting boss abuts against the end of the impeller shaft.

11. The prefilter according to claim 5, wherein The outer frame is provided with a recessed snap-fit ​​groove on one side of the mounting seat. The impeller body includes an impeller shaft. The impeller shaft is provided with at least one flat position in the circumference. The impeller shaft is inserted into the snap-fit ​​groove. The flat position is adapted to abut against the side groove wall of the snap-fit ​​groove.

12. The pre-filter according to claim 5, characterized in that The impeller body includes an impeller shaft. In the impeller cavity, a cavity wall of the mounting seat away from the outer frame is provided with a limiting groove, and one end of the impeller shaft away from the outer frame is rotatably inserted into the limiting groove.

13. The pre-filter according to claim 12, wherein: The mounting seat is further provided with a ball, which is arranged at the bottom of the limiting groove and is in rolling contact with the impeller shaft.

14. The pre-filter according to claim 5, characterized in that A sealing ring is provided on the outer periphery of the mounting seat, and the sealing ring is in sealing contact between the mounting seat and the inner wall of the shell. The impeller chamber is located on a side of the sealing ring close to the outer frame.

15. The pre-filter according to claim 1, wherein The outer frame includes side frames enclosed along the circumferential direction, and the water flow driving member is clamped to the end of the side frame close to the water inlet.

16. The pre-filter according to claim 15, characterized in that The water flow driving member includes a hanging portion, which is hung on the end of the side frame and is clamped with the side frame.

17. The pre-filter according to claim 16, wherein: The end of the side frame is provided with an avoidance groove, and the hanging portion includes a first wall body and a second wall body spaced opposite to each other along the radial direction of the side frame, and the first wall body and the second wall body are connected at one end close to the water inlet; The end portion of the side frame is adapted to be inserted between the first wall body and the second wall body; and / or the first wall body is adapted to be clamped in the avoidance groove.

18. The pre-filter according to claim 17, wherein: The groove wall of the avoidance groove is provided with a locking protrusion, the first wall body is provided with a buckle opening, and the locking protrusion is locked in the buckle opening; And / or, surfaces on different sides of the first wall body are correspondingly arranged flush with the outer peripheral wall and / or end wall of the side frame.

19. The pre-filter according to claim 16, wherein: The water flow driving member further includes a driving body connected to the hanging portion, the driving body is hung on the inner side of the side frame, the hanging portion is engaged with the outer side of the side frame, and the driving surface is formed on the driving body.

20. The pre-filter according to claim 1, wherein The driving surface is parallel to the axial direction of the outer skeleton.

21. The pre-filter according to claim 20, characterized in that The exoskeleton includes side frames enclosed along the circumferential direction, and the water flow driving component includes a driving body arranged in a conformal manner with the inner circumferential wall of the side frame. The driving body extends in an arc shape along the circumference of the side frame and is provided with a plurality of water baffles distributed at intervals, and the driving surface is formed on the water baffles.

22. The prefilter according to any one of claims 1 to 21, characterized in that The pre-filter further comprises a water distributor, which is arranged closer to the water inlet than the water flow driving member, and has a plurality of guide blades distributed circumferentially and tilted relative to the axial direction. And / or, the exoskeleton is provided with a plurality of the water flow driving members, and the plurality of the water flow driving members are distributed at intervals along the circumference of the exoskeleton.

23. A water system, characterized in that: Comprising the pre-filter according to any one of claims 1 to 22.

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