Pre-filter and water system

Abstract

The utility model discloses a pre-filter and a water consuming system, and relates to the technical field of water purifying equipment, the pre-filter comprises a filter bottle, an outer framework and an impeller assembly; the filter bottle is provided with a water filtering cavity and a drain outlet communicated with the water filtering cavity, and a filtering assembly is arranged in the water filtering cavity; the outer framework is rotatably arranged in the water filtering cavity and is arranged outside the filtering assembly in a sleeving manner; the impeller assembly comprises a mounting seat and an impeller body, the mounting seat is arranged in the water filtering cavity and located between the outer framework and the sewage draining exit, an impeller cavity is formed in the mounting seat, and the impeller body is rotatably arranged in the impeller cavity and connected with the outer framework in a clamped mode; and the water filtering cavity is communicated with the drain outlet through the impeller cavity. According to the technical scheme, the impeller body drives the outer framework to rotate, water flow is stirred, the flushing efficiency is improved, and the filtering effect is guaranteed.

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] The conventional pre-filter includes a filter bottle and a filter assembly disposed within the filter bottle. During the filtration process, water flows from the water inlet into the filter chamber, is filtered by the filter assembly, and flows to the water outlet. During the flushing process, water flows from the water inlet into the filter chamber, flushes the filter assembly, and flows out of the sewage outlet. However, when flushing the pre-filter, the water chamber, especially the surface of the filter assembly, is not flushed sufficiently, allowing impurities to stubbornly adhere to the filter assembly, causing clogging of the filter assembly and reducing 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 water use system, which aims to drive the outer skeleton to rotate through the impeller body, stir the water flow, improve the flushing efficiency, and ensure the filtering effect.

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

[0005] A filter bottle, wherein the filter bottle is provided with a water filter cavity and a sewage outlet connected to the water filter cavity, and a filter assembly is provided in the water filter cavity;

[0006] An outer frame is rotatably disposed in the water filter cavity and sleeved outside the filter assembly; and

[0007] An impeller assembly, comprising a mounting seat and an impeller body, wherein the mounting seat is disposed in the water filter cavity and is located between the exoskeleton and the sewage outlet, an impeller cavity is defined within the mounting seat, and the impeller body is rotatably disposed in the impeller cavity and is engaged with the exoskeleton;

[0008] Wherein, the water filter chamber is connected to the sewage outlet through the impeller chamber.

[0009] In one embodiment, a first avoidance opening is provided on the side of the mounting seat facing the outer skeleton, the impeller body includes an impeller shaft, and a clamping portion is provided on the side of the outer skeleton facing the mounting seat, and the impeller shaft is clamped with the clamping portion through the first avoidance opening.

[0010] 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.

[0011] In one embodiment, the second protrusion extends out of the first avoidance opening.

[0012] In one embodiment, in the axial direction away from the outer skeleton, two side walls of the first protrusion that are oppositely distributed along the circumference of the impeller body extend in an opposite manner and are inclined.

[0013] 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.

[0014] In one embodiment, the outer frame is provided with a second avoidance opening, the reversing member is passed through the second avoidance opening, the outer frame is provided with a clamping portion clamped to the impeller shaft, and the clamping portion is arranged around the periphery of the second avoidance opening.

[0015] In one embodiment, the impeller shaft includes a main section and a connecting section along the axial direction, the inner diameter of the main section is smaller than the inner diameter of the connecting section, the inner periphery of the main section slides against the reversing member, and the outer periphery of the main section is connected to multiple blades.

[0016] 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.

[0017] In one embodiment, the mounting seat includes a plurality of the supporting bosses, and the plurality of the supporting bosses are evenly distributed around the periphery of the third avoidance opening.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] In one embodiment, the mounting seat is provided with a first avoidance opening on a side facing the exoskeleton, the impeller body includes an impeller shaft passing through the first avoidance opening, and in the impeller cavity, the mounting seat is provided with a limiting protrusion ring protruding inward along the periphery of the first avoidance opening, and the limiting protrusion is arranged around the outer periphery of the impeller shaft so that the blades of the impeller body are spaced axially from the cavity wall of the impeller cavity.

[0022] 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.

[0023] 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 filter bottle, and the impeller chamber is located on a side of the sealing ring close to the outer frame.

[0024] The present invention also provides a water use system, which includes the pre-filter as described above.

[0025] The technical solution of the present invention is to set an impeller assembly between the exoskeleton and the sewage outlet, and the mounting seat of the impeller assembly is connected to the filter bottle in the water filter chamber, and an impeller chamber is opened. The impeller body is rotatably set in the impeller chamber and is engaged with the exoskeleton to achieve support for the exoskeleton and synchronous rotation of the two. In this way, during the flushing process of the pre-filter, water flows toward the sewage outlet, passes through the filtered water chamber and the impeller chamber in turn, and under the push of the water flow, the impeller body rotates in the impeller chamber, thereby pulling the exoskeleton to rotate, thereby disturbing the water flow in the water filter chamber, increasing the water flow's flushing ability on the filter assembly, the exoskeleton, the water filter chamber wall and other parts, so that impurities are separated from the filter assembly, the exoskeleton and the water filter chamber wall and other parts, and then the water is discharged through the sewage outlet, thereby taking out the impurities in the water filter chamber, avoiding impurities from being deposited and adhering to the filter assembly, the exoskeleton and the outer wall of the water filter chamber, reducing the possibility of clogging of the filter assembly, thereby ensuring the filtering effect of the filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the 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.

[0027] Figure 1 A cross-sectional view of an embodiment of a pre-filter provided by the present utility model;

[0028] Figure 2 for Figure 1 Schematic diagram of the coordination of the inner and outer skeletons, impeller assembly and reversing structure;

[0029] Figure 3 for Figure 2 Schematic diagram of the structure of the meso-exoskeleton;

[0030] Figure 4 for Figure 2 Schematic diagram of the structure of the middle impeller assembly;

[0031] Figure 5 for Figure 2 Schematic diagram of the structure of the middle impeller body and the bottom wall of the mounting base;

[0032] Figure 6 for Figure 2 A schematic structural diagram of the bottom wall of the middle mounting seat;

[0033] Figure 7 for Figure 1 Cross-sectional view of the impeller assembly and reversing structure;

[0034] Figure 8 for Figure 7 A partial enlarged view of point A in the middle;

[0035] Figure 9 A partial cross-sectional view of another embodiment of the pre-filter provided by the present invention;

[0036] Figure 10 for Figure 9 A partial enlarged view of point B in the middle;

[0037] Figure 11 for Figure 9 Schematic diagram of the structure of the impeller assembly.

[0038] Description of Figure Numbers:

[0039] 100, housing;

[0040] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet;

[0041] 20, valve head; 201, water inlet; 202, water outlet;

[0042] 30. Filter component;

[0043] 40. Impeller assembly;

[0044] 410, mounting seat; 401, impeller chamber; 421, first avoidance opening; 422, sealing ring; 423, third avoidance opening; 430, supporting boss; 431, limiting protrusion; 432, give way groove; 433, limiting groove; 434, ball bearing;

[0045] 440, impeller body; 441, impeller shaft; 442, blades; 443, second protrusion; 444, main section; 445, connecting section; 446, flat part;

[0046] 50, outer frame; 513, snap-fit ​​portion; 514, first protrusion; 515, second avoidance opening; 518, snap-fit ​​groove;

[0047] 70. Reversing structure; 710. Reversing bottom shell; 720. Reversing member; 730. Suction cup.

[0048] 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

[0049] 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 any creative work are within the scope of protection of the present invention.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] The utility model provides a pre-filter.

[0056] Please refer to Figure 1 、 Figure 2 and Figure 8 In one embodiment of the present invention, the pre-filter comprises:

[0057] The filter bottle 10 is provided with a water filter chamber 101 and a sewage outlet 102 connected to the water filter chamber 101. The water filter chamber 101 is provided with a filter assembly 30;

[0058] The outer frame 50 is rotatably disposed in the water filter chamber 101 and sleeved on the outside of the filter assembly 30; and

[0059] The impeller assembly 40 includes a mounting seat 410 and an impeller body 440. The mounting seat 410 is disposed in the water filter chamber 101 and is located between the outer frame 50 and the sewage outlet 102. The mounting seat 410 defines an impeller chamber 401. The impeller body 440 is rotatably disposed in the impeller chamber 401 and is engaged with the outer frame 50.

[0060] The water filter chamber 101 is connected to the sewage outlet 102 through the impeller chamber 401 .

[0061] The technical solution of the present invention is to set the impeller assembly 40 between the outer frame 50 and the sewage outlet 102, the mounting seat 410 of the impeller assembly 40 is connected to the filter bottle 10 in the water filter chamber 101, and an impeller chamber 401 is opened. The impeller body 440 is rotatably set in the impeller chamber 401 and is engaged with the outer frame 50 to achieve support for the outer frame 50 and synchronous rotation of the two. In this way, during the flushing process of the pre-filter, the water flows through the sewage outlet 102, passes through the filtered water chamber 101 and the impeller chamber 401 in turn, and under the push of the water flow, the impeller body 440 is rotated in the impeller chamber 401. 01 rotates, thereby pulling the exoskeleton 50 to rotate, thereby disturbing the water flow in the water filter chamber 101, increasing the water flow's flushing ability on the filter component 30, the exoskeleton 50, the wall of the water filter chamber 101 and other parts, so that impurities are separated from the filter component 30, the exoskeleton 50 and the wall of the water filter chamber 101 and other parts, and then the water flow is discharged through the sewage outlet 102, thereby taking out the impurities in the water filter chamber 101, avoiding the impurities from being deposited and attached to the filter component 30, the exoskeleton 50 and the outer wall of the water filter chamber 101, reducing the possibility of clogging of the filter component 30, thereby ensuring the filtering effect of the filter component 30.

[0062] 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. 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 to realize the pre-filtration of water by the filter component 30. 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. In this process, the water flow can impact the impeller body 440 in the impeller chamber 401, 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. Among them, the directional indications such as the upper part, the lower part, and the top part referred to in this scheme are the general use status of the pre-filter, that is, Figure 1 For reference, similarly, for the axial, circumferential and radial directions referred to in this solution, Figure 2 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.

[0063] In one embodiment, please refer to Figures 2 to 4A 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 clamped together, 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 clamped together, 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 formed integrally with the impeller body 440.

[0064] Further, in this embodiment, please refer to Figures 2 to 4 The 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.

[0065] Further, in this embodiment, please refer to Figure 3 and Figure 4The second protrusion 443 extends out of the first avoidance opening 421, that is, the second protrusion 443 is exposed outside the impeller cavity 401. When the impeller body 440 is connected to the exoskeleton 50, the first protrusion 514 and the second protrusion 443 are connected outside the impeller cavity 401, providing the technician with an operational vision of the connection, avoiding the impeller cavity 401 from blocking the connection between the impeller body 440 and the exoskeleton 50, and improving the operational convenience of the connection between the exoskeleton 50 and the impeller body 440.

[0066] In addition, please refer to the examples. Figure 3 and Figure 4 Regarding the snap-fitting form of the first protrusion 514 and the second protrusion 443 , in the axial direction away from the outer skeleton 50 , the two side walls of the first protrusion 514 , which are relatively distributed along the circumference of the impeller body 440 , extend in opposite directions and tilt. It should be noted that the first protrusion 514 and the second protrusion 443 extend toward each other in the axial direction of the impeller shaft 441, and the first protrusion 514 has two circumferential side walls distributed along the circumference of the impeller body 440. In the protruding direction of the first protrusion 514, the two relative circumferential side walls of the first protrusion 514 extend outwardly and tilted away from each other. Correspondingly, the second protrusion 443 also has two circumferential side walls distributed along the circumference of the impeller body 440. In the protruding direction of the second protrusion 443, the two relative circumferential side walls of the second protrusion 443 extend outwardly and tilted away from each other. When the first protrusion 514 can be clamped between two adjacent second protrusions 443, the first protrusion 514 and the second protrusion 443 have an axial limiting connection effect, that is, the first protrusion 514 and the second protrusion 443 are connected in a manner similar to a mortise and tenon joint. In this way, the first protrusion 514 and the second protrusion 443 are not only connected in a circumferential direction but also in an axial direction, thereby ensuring the connection stability between the outer skeleton 50 and the impeller body 440 .

[0067] 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.

[0068] Further, in this embodiment, please refer to Figure 3 The exoskeleton 50 is provided with a second avoidance opening 515, through which the reversing member 720 is inserted. The exoskeleton 50 is provided with a clamping portion 513 that is clamped to the impeller shaft 441, and the clamping portion 513 is arranged around the periphery of the second avoidance opening 515. Referring to the above-mentioned design of the reversing structure 70, the second avoidance opening 515 is used to avoid the reversing member 720, so that the user can drive the reversing member 720 from the end of the exoskeleton 50 away from the impeller assembly 40 to achieve switching between filtering and flushing. In addition, the clamping portion 513 is arranged around the periphery of the second avoidance opening 515 to avoid interference with the connection between the exoskeleton 50 and the impeller body 440, thereby realizing an integrated design of the reversing structure 70, the impeller assembly 40, and the exoskeleton 50, thereby improving the compactness of the pre-filter.

[0069] In one embodiment, please follow Figure 5 and Figure 8The impeller shaft 441 includes a main section 444 and a connecting section 445 along the axial direction. The inner diameter of the main section 444 is smaller than the inner diameter of the connecting section 445. The inner periphery of the main section 444 slides against the reversing member 720. The outer periphery of the main section 444 is connected to multiple blades 442. It can be understood that the impeller shaft 441 rotates around the reversing shaft of the reversing member 720, and the inner periphery of the main body section 444 is arranged to slide against the reversing member 720, so that the reversing shaft provides radial support for the rotating shaft of the impeller body 440, thereby preventing the impeller body 440 from swinging and affecting the rotation efficiency. In addition, the main body section 444 is externally connected with blades 442. When the water flow impacts the blades 442, the blades 442 transfer the force to the impeller shaft 441. With the support of the reversing shaft, the force transmission between the blades 442 and the impeller shaft 441, and the force transmission between the impeller shaft 441 and the reversing shaft are in the same radial direction, thereby avoiding axial deviation, thereby improving the rotation stability of the impeller body 440. In addition, the inner diameter of the main section 444 is smaller than the inner diameter of the connecting end, which reduces the contact area between the impeller shaft 441 and the reversing shaft, reduces the friction between the two, ensures the rotation efficiency of the impeller body 440, and improves the impact effect of the water flow on the filter assembly 30.

[0070] In one embodiment, please refer to Figure 7 and Figure 8 A third avoidance opening 423 is provided on the side of the mounting seat 410 facing the reversing bottom shell 710, and the reversing member 720 is passed through the third avoidance opening 423. A supporting boss 430 is provided on the periphery of the third avoidance opening 423 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 .

[0071] Specifically, in this embodiment, please refer to Figure 6 and Figure 8 , the mounting seat 410 includes a plurality of support bosses 430, and the plurality of support bosses 430 are evenly distributed around the circumference of the third avoidance opening 423. It can be understood that reducing the abutment area between the impeller shaft 441 and the support bosses 430 can reduce the friction resistance encountered by the impeller shaft 441 during rotation, thereby improving the smoothness of rotation of the impeller body 440. In this way, the plurality of support bosses 430 are evenly distributed around the circumference of the third avoidance opening 423, and two adjacent support bosses 430 are spaced apart, which reduces the friction between the impeller shaft 441 and the support bosses 430, and at the same time, ensures the stability of the support bosses 430 in supporting the impeller body 440. Of course, in other embodiments, the support bosses 430 can also be continuously arranged around the third avoidance opening 423, that is, arranged in a ring shape.

[0072] Similarly, referring to Figure 7 and Figure 8 In one embodiment, a first avoidance opening 421 is formed on the side of the mounting seat 410 facing the outer frame 50, and the impeller body 440 includes an impeller shaft 441 passing through the first avoidance opening 421. In the impeller cavity 401, the mounting seat 410 is provided with a limiting protrusion 431 protruding inward along the periphery of the first avoidance opening 421. The limiting protrusion 431 is arranged around the outer periphery of the impeller shaft 441 so that the blades 442 of the impeller body 440 are spaced apart from the cavity wall of the impeller cavity 401 in the axial direction. In accordance with the function of the aforementioned support boss 430, a limiting protrusion 431 is axially opposed to the impeller body 440 on the side of the impeller body 440 facing away from the support boss 430 and is disposed around the periphery of the first avoidance opening 421. This reduces the contact area between the impeller body 440 and the impeller cavity 401, reduces the friction between the impeller body 440 and the impeller cavity 401, and ensures the rotational stability of the impeller body 440. The impeller shaft 441 extends out of the first avoidance opening 421. Alternatively, the limiting protrusion 431 may be sleeved on the outermost periphery of the impeller shaft 441 and axially opposed to the root portion of the blade 442 connected to the impeller shaft 441.

[0073] In another embodiment, please refer to Figures 9 to 11The 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 disposed circumferentially. The impeller shaft 441 is inserted into the engaging groove 518, and the flattened portion 446 fits against the side wall of the engaging groove 518. It is understood that, with reference to the description of the engaging portion 513 disposed on the outer frame 50, the engaging groove 518 is formed on the engaging portion 513. The engaging portion 513 is recessed axially with the engaging groove 518. The engaging groove 518 fits or has an interference fit with the end of the impeller shaft 441. Flattened portions 446 are disposed circumferentially between the engaging groove 518 and the impeller shaft 441. During the rotation of the impeller body 440, the flattened portions 446 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.

[0074] Specifically, in one embodiment, please refer to Figures 9 to 11 On 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.

[0075] In one embodiment, please refer to Figures 9 to 11The 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.

[0076] Further, in this embodiment, please refer to Figures 9 to 11 The 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.

[0077] In one embodiment, please refer to Figure 2 、 Figure 7 and Figure 9A 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.

[0078] 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.

[0079] 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.

[0080] 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 filter bottle, wherein the filter bottle is provided with a water filter cavity and a sewage outlet connected to the water filter cavity, and a filter assembly is provided in the water filter cavity; An outer frame is rotatably disposed in the water filter cavity and sleeved outside the filter assembly; as well as An impeller assembly, comprising a mounting seat and an impeller body, wherein the mounting seat is disposed in the water filter cavity and is located between the exoskeleton and the sewage outlet, an impeller cavity is defined within the mounting seat, and the impeller body is rotatably disposed in the impeller cavity and is engaged with the exoskeleton; Wherein, the water filter chamber is connected to the sewage outlet through the impeller chamber.

2. The prefilter according to claim 1, wherein The mounting seat is provided with a first avoidance opening on one side facing the outer frame, the impeller body includes an impeller shaft, the outer frame is provided with a clamping portion on one side facing the mounting seat, and the impeller shaft is clamped with the clamping portion through the first avoidance opening.

3. The prefilter according to claim 2, 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.

4. The prefilter according to claim 3, characterized in that The second protrusion extends out of the first avoidance opening.

5. The pre-filter according to claim 3, characterized in that: In the axial direction away from the outer skeleton, two side walls of the first protrusion that are oppositely distributed along the circumference of the impeller body extend in an opposite direction and are inclined.

6. The prefilter according to claim 2, 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.

7. The prefilter according to claim 1, 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.

8. The pre-filter according to claim 7, characterized in that The outer frame is provided with a second avoidance opening, the reversing member is passed through the second avoidance opening, the outer frame is provided with a clamping portion clamped to the impeller shaft, and the clamping portion is arranged around the periphery of the second avoidance opening.

9. The prefilter according to claim 7, wherein: The impeller shaft includes a main body section and a connecting section along the axial direction. The inner diameter of the main body section is smaller than that of the connecting section. The inner periphery of the main body section slides against the reversing member. The outer periphery of the main body section is connected to a plurality of blades.

10. The prefilter according to claim 7, wherein: 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 10, wherein: The mounting seat includes a plurality of support bosses, and the plurality of support bosses are evenly distributed around the periphery of the third avoidance opening.

12. The pre-filter according to claim 1, 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.

13. The pre-filter according to claim 1, wherein: 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.

14. The pre-filter according to claim 13, 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.

15. The pre-filter according to claim 1, wherein The mounting seat is provided with a first avoidance opening on one side facing the outer skeleton, and the impeller body includes an impeller shaft passing through the first avoidance opening. In the impeller cavity, the mounting seat is provided with a limiting protrusion ring protruding inward along the periphery of the first avoidance opening, and the limiting protrusion is arranged around the outer periphery of the impeller shaft so that the blades of the impeller body are spaced apart from the cavity wall of the impeller cavity in the axial direction.

16. The prefilter according to any one of claims 1 to 15, 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 filter bottle. The impeller chamber is located on a side of the sealing ring close to the outer frame.

17. A water system, characterized in that: Comprising the pre-filter according to any one of claims 1 to 16.

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