Pre-filter and water system

Abstract

The utility model discloses a prefilter and a water consuming system, the prefilter comprises a shell, the shell is provided with a water filtering cavity, a water inlet and a water outlet, the shell is provided with a waterproof ring between the water inlet and the water outlet, the water inlet is communicated with the outer peripheral side of the waterproof ring, and the water outlet is communicated with the inner peripheral side of the waterproof ring; the filtering assembly is opposite to the waterproof ring, a water distributor is arranged at one end, close to the waterproof ring, of the filtering assembly, and the water distributor is provided with a water passing space; the reversing piece is movably inserted into the filtering assembly and the water separation ring, so that the pre-filter is switched between a filtering mode and a flushing mode, and the reversing piece can be maintained at a position corresponding to the filtering mode under the action of the elastic piece; in the filtering mode, the water inlet is communicated with the water passing space and is separated from the communicating part; and in the flushing mode, the water inlet is communicated with the communicating part, and the water inlet and the water passing space are separated by the blocking part. According to the technical scheme provided by the utility model, the filtering effect of the filtering assembly can be ensured, and the service life of the pre-filter is prolonged.

Description

Technical Field

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

[0002] As people's living standards continue to improve, their demands for daily water use are also increasing. Due to long-term disrepair and aging of tap water pipes, large particles harmful to the human body, such as silt, rust, and bloodworms, are present in the water, seriously affecting residents' water safety. Therefore, a pre-filter, equipped with a filter assembly and other components, is required to filter out large particles before the tap water is consumed. However, while the pre-filter is filtering the water, impurities may accumulate in the filter chamber, especially on the surface of the filter assembly. Over time, these impurities may 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 a water use system, aiming to ensure the filtering effect of the filter component and to increase the service life of the pre-filter.

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

[0005] The shell has a water filter cavity, and a water inlet and a water outlet connected to the water filter cavity. The shell is provided with a water isolation ring between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolation ring, and the water outlet is connected to the inner peripheral side of the water isolation ring;

[0006] A filter assembly is disposed in the water filter cavity and is arranged opposite to the water isolation ring. The filter assembly includes a water distributor. The water distributor is disposed at one end of the filter assembly close to the water isolation ring. The water distributor forms a water flow space communicating with the water filter cavity; and

[0007] A reversing member is provided in a hollow shape, and is movably inserted into the filter assembly and the water-isolating ring to switch the pre-filter between a filtering mode and a flushing mode. The reversing member includes a connecting portion and a blocking portion. The reversing member is connected to an elastic member. Under the action of the elastic member, the reversing member can be maintained in a position corresponding to the filtering mode;

[0008] In the filtering mode, on the adjacent side of the water distributor and the water isolation ring, the water inlet is connected to the water flow space, and the water inlet is separated from the inner circumference of the reversing member;

[0009] In the flushing mode, on the adjacent side of the water distributor and the water isolation ring, the water inlet is connected to the inner circumference of the reversing member through the connecting portion, and the blocking portion separates the water inlet from the water flow space.

[0010] In one embodiment, two ends of the elastic member are respectively connected to the reversing member and the filter assembly.

[0011] In one embodiment, the elastic member is installed between the reversing member and the water distributor.

[0012] In one embodiment, the barrier portion includes an annular main body extending axially along the reversing member, and a barrier skirt arranged on the outer periphery of the annular main body, the barrier skirt covers the water flow space in the flushing mode, and one end of the elastic member is located on the inner side of the annular main body.

[0013] In one embodiment, a first guide portion is provided on the inner side of the annular main body, and the elastic member is sleeved on the first guide portion.

[0014] In one embodiment, a water flow portion is further provided on the inner periphery of the annular main body, and the water flow portion is provided with a first connecting hole. In the filtering mode, the first connecting hole is connected to the inner periphery of the filter assembly, and the elastic member is arranged between the water flow portion and the annular main body.

[0015] In one embodiment, the water distributor is provided with a mounting ring groove connected to the inner circumference of the filter assembly, the water flow space is arranged on the outer circumferential side of the mounting ring groove, the reversing member is slidably inserted into the mounting ring groove, and one end of the elastic member is inserted into the mounting ring groove.

[0016] In one embodiment, a second guide portion is provided on the inner side of the mounting ring groove, and the elastic member is sleeved on the second guide portion.

[0017] In one embodiment, a water flow portion is further provided on the inner periphery of the annular main body, and in the filtering mode, the water flow portion is in communication with the inner periphery of the filtering assembly;

[0018] A blocking portion protruding inward is provided at the bottom of the mounting ring groove. In the flushing state, the blocking portion blocks the communication between the water flow portion and the inner periphery of the filter assembly.

[0019] In one embodiment, one end of the elastic member is sleeved on the water passing portion, and the other end is sleeved on the blocking portion.

[0020] In one embodiment, the elastic member is installed between the blocking portion and the water distributor.

[0021] In one embodiment, a hollow pipe section is provided on the side of the blocking portion away from the connecting portion, the hollow pipe section is inserted into the inner circumference of the filter assembly, and a second connecting hole is provided on the peripheral wall of the hollow pipe section, one end of the elastic member is connected to the hollow pipe section, and the other end is connected to the filter assembly.

[0022] In one embodiment, the elastic member is configured as a spring.

[0023] In one embodiment, the water isolation ring and the water distributor together form a water flow structure, and the water flow structure is connected to the water inlet;

[0024] On the adjacent side of the water distributor and the water isolation ring, in the filtering mode, the water flow structure is separated from the connecting portion, and in the flushing mode, the water flow structure is connected to the connecting portion.

[0025] In one embodiment, the water separator and the water distributor are formed separately, and the water flow structure is the gap between the water separator and the water distributor;

[0026] In the filtering mode, the baffle is located at least between the water isolation ring and the water distributor, so that the water inlet is connected to the water flow space;

[0027] In the flushing mode, the connecting portion is at least partially located between the water isolation ring and the water distributor, so that the connecting portion is connected to the water inlet, and the blocking portion blocks the water flow space.

[0028] In one embodiment, the reversing member is axially movable relative to the housing, and the communicating portion and the blocking portion are distributed along the axial direction.

[0029] The utility model also provides a water use system, comprising the pre-filter as described above.

[0030] The technical solution of the present invention is to set a water filter chamber and a water inlet and a water outlet connected to the water filter chamber on the shell, and the shell is provided with a water isolation ring between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolation ring, and the water outlet is connected to the inner peripheral side of the water isolation ring; the filter assembly is arranged in the water filter chamber and is arranged opposite to the water isolation ring; the water distributor is arranged at one end of the filter assembly close to the water isolation ring, and forms a water flow space connected to the water filter chamber; the reversing member is hollow, including a connecting part and a blocking part, the reversing member is movably inserted in the filter assembly and the water isolation ring, so that the pre-filter can switch between the filtering mode and the flushing mode, and the reversing member is connected to an elastic member, and under the action of the elastic member, the reversing member can maintain a position corresponding to the filtering mode.

[0031] In filtering mode, the water inlet is connected to the water flow space, and the circumferential porous structure of the connecting portion is blocked. This allows raw water entering through the water inlet to flow directly through the water flow space to the filter assembly for filtration, flowing radially from the outside to the inside of the filter assembly, thereby filtering the raw water. Then, under the action of water pressure, it flows upward and flows out of the water outlet through the inner periphery of the reversing member. In flushing mode, the water inlet is connected to the inner periphery of the reversing member through the connecting portion, and the baffle separates the water inlet from the water flow space. This allows raw water entering through the water inlet to enter the inner periphery of the reversing member through the circumferential porous structure of the connecting portion, then flow to the filter assembly to flush the filter assembly, and finally be discharged through the sewage outlet.

[0032] Thus, through the movement of the reversing member relative to the filter assembly, the water distributor, and the water isolation ring, the connectivity between the different structures is changed, thereby changing the flow direction of the raw water entering the water inlet and changing the water flow path within the water filter chamber, thereby enabling the pre-filter to switch between the filtering mode and the flushing mode, achieving self-flushing of the internal filtering assembly of the pre-filter, and thereby enabling the pre-filter to regularly clean the filtering assembly, thereby ensuring the filtering effect of the filtering assembly and thereby improving the service life of the pre-filter. Furthermore, by providing an elastic member within the water filter chamber, the elastic member is connected to the reversing member, so that the reversing member is maintained in a position corresponding to the filtering mode, thereby achieving self-reset of the pre-filter to the filtering mode, facilitating the switching of the pre-filter between the filtering mode and the flushing mode. 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 cross-sectional view of an embodiment of a pre-filter provided by the present invention in filtering mode;

[0035] Figure 2 for Figure 1 A cross-sectional view of the middle pre-filter after the lower portion is disconnected;

[0036] Figure 3 for Figure 1 Cross-sectional view of the pre-filter in flushing mode;

[0037] Figure 4 for Figure 3 A cross-sectional view of the middle pre-filter after the lower portion is disconnected;

[0038] Figure 5 for Figure 1 A schematic structural diagram of a commutator at one angle;

[0039] Figure 6 for Figure 1 A schematic structural diagram of the commutator from another angle.

[0040] Description of Figure Numbers:

[0041] 10. Filter bottle; 101. Water filter chamber; 102. Sewage outlet;

[0042] 20. Valve head; 201. Water inlet; 202. Water outlet; 203. Water isolation ring; 22. Metal shell; 23. Plastic lining;

[0043] 30. Filter component;

[0044] 60. Water distributor; 601. Water flow space; 602. Mounting ring groove; 604. Blocking portion; 605. Second guide portion;

[0045] 720, reversing member; 721, connecting portion; 722, blocking portion; 7221, annular main body; 7222, blocking skirt; 7224, water passing portion; 7225, first connecting hole; 7226, first guide portion; 723, hollow pipe section; 7231, second connecting hole; 730, suction cup; 740, elastic member.

[0046] 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

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The present invention proposes a pre-filter, the internal components of which can realize the switching of the internal flow channel, so that the filter assembly 30 inside can be cleaned regularly to discharge the large particulate matter previously intercepted, thereby eliminating the need for manual disassembly and cleaning of the pre-filter, thereby increasing the service life of the pre-filter.

[0051] Water systems, such as whole-house water purification systems, typically feature a pre-filter to filter out large particles from tap water. This not only ensures water safety but also extends the life of appliances, prevents clogged household water pipes, and improves residents' health. The pre-filter is the first coarse filtration device in a whole-house water purification system. It is a physical filter that primarily intercepts large particles larger than 40 microns, ensuring back-end water safety.

[0052] See also Figure 1 and Figure 3 In one embodiment of the present invention, the pre-filter includes a shell, the shell has a water filter chamber 101, and a water inlet 201 and a water outlet 202 connected to the water filter chamber 101, and the shell is provided with a water isolation ring 203 between the water inlet 201 and the water outlet 202, the water inlet 201 is connected to the outer peripheral side of the water isolation ring 203, and the water outlet 202 is connected to the inner peripheral side of the water isolation ring 203.

[0053] The shell is usually formed in two parts, so the shell includes a filter bottle 10 and a valve head 20 connected to the filter bottle 10. The water filter chamber 101 is at least provided in the filter bottle 10. The water inlet 201, the water outlet 202 and the water isolation ring 203 are all provided in the valve head 20. The water isolation ring 203 is located on the inner side of the valve head 20. The water inlet 201 is connected to the outer peripheral side of the water isolation ring 203, and the water outlet 202 is connected to the inner peripheral side of the water isolation ring 203, thereby separating the water inlet 201 and the water outlet 202, which is convenient for controlling the connection between the water inlet 201 and the water outlet 202.

[0054] The water inlet 201 is connected to the water supply end of the water supply system, and the water outlet 202 is connected to the water consumption end of the water supply system, thereby filtering the raw water flowing from the water supply end to the water consumption end. It should be noted that the water supply end can be a tap, water tower, or well water, and the water consumption end can be a faucet, shower, or drinking water outlet, which is not specifically limited in this application.

[0055] The valve head 20 and filter bottle 10 are primarily connected by a threaded connection. For example, the valve head 20 is provided with an externally threaded tube, and the mouth of the filter bottle 10 is provided with corresponding internal threads for threading the externally threaded tube. To reduce the production difficulty of the prefilter, lower the requirements for assembly testing, and lower the material cost of the valve head 20, in this embodiment, the filter bottle 10 and valve head 20 are fastened together using fasteners.

[0056] The valve head 20 comprises a connected metal outer shell and a plastic inner lining 23. The water inlet 201, water outlet 202, and water isolation ring 203 are all formed in the plastic inner lining 23. This ensures that water flowing through the pre-filter directly contacts the plastic inner lining 23 rather than the metal outer shell, preventing water contamination by metal elements precipitated from the metal outer shell while also enhancing the pre-filter's aesthetics and housing strength. Furthermore, the water isolation ring 203 can be integrally injection-molded into the plastic inner lining 23, facilitating its molding. In other embodiments, the valve head 20 can also be configured directly as a metal component.

[0057] The material of the metal shell part and the plastic lining part 23 is not specifically limited in this application. For example, the material of the metal shell part can be a copper alloy, such as brass, and the material of the plastic lining part 23 can be PP (polypropylene) or PVC (polyvinyl chloride).

[0058] The pre-filter also includes a filter assembly 30 disposed within the water filter chamber 101. After raw water (e.g., tap water or well water) flows from an external water source into the water inlet 201, it can flow through the filter assembly 30 for filtration. The filter assembly 30 can intercept large particles of impurities in the water and remove some precipitated impurities, rust, sand, mud, bacteria, and other particulate impurities generated in the pipeline. This provides better protection for water purifiers, washing machines, showers, high-end faucets, downstream pipelines, etc., reducing the risk of damage to these devices due to impurity blockage. The form and structure of the filter assembly 30 are not limited, and the filter assembly 30 can be a stainless steel filter or a PP cotton filter.

[0059] The filter assembly 30 is arranged opposite to the water-isolating ring 203. The pre-filter is usually a "T"-shaped structure. The left and right ends of the upper "horizontal" position are the water inlet 201 and the water outlet 202 respectively. The water-isolating ring 203 is arranged toward the lower "vertical", and the lower "vertical" is used to install the filter assembly 30. Its lowermost end (the end away from the water inlet 201) usually has a sewage outlet 102, and the sewage valve is used to control its opening and closing.

[0060] The filter assembly 30 also includes a water distributor 60, which is located at one end of the filter assembly 30 near the water isolation ring 203. The water distributor 60 defines a water flow space 601 that communicates with the water filter chamber 101. Raw water can flow through the water flow space 601 to the filter assembly 30, allowing the filter assembly 30 to filter the raw water. The water flow space 601 has a spiral flow path within it. Raw water entering the water flow space 601 from the water inlet 201 forms a swirling flow after passing through the water distributor 60. This improves the uniformity of the raw water flow to the filter assembly 30 and increases the flow rate of the raw water. In this embodiment, the water distributor 60 is fixedly attached to the wall of the water filter chamber 101, and the filter portion of the filter assembly 30 is fixedly connected to the side of the water distributor 60 facing away from the water isolation ring 203, thereby facilitating the fixed installation of the filter assembly 30. The filter portion of the filter assembly 30 can be fixed to the water distributor 60 via a snap-fit ​​structure or can be directly integrally formed with the water distributor 60.

[0061] The reversing member 720 can be movably inserted into the filter assembly 30, the water distributor 60 and the water isolating ring 203. The water isolating ring 203 and the filter assembly 30 are arranged along the axial direction of the water filter chamber 101, and the filter assembly 30 has a hollow structure passing through its axial direction for the reversing member 720 to pass through, so that the reversing member 720 can slide in the water filter chamber 101 to change the connectivity between different components in the water filter chamber 101, thereby changing the direction of water flow to switch different working modes of the pre-filter.

[0062] In this embodiment, please refer to Figures 1 to 4 A reversing member 720 is further provided in the water filter chamber 101. The reversing member 720 is hollow and movably inserted into the filter assembly 30 and the water isolation ring 203, so that the pre-filter can be switched between the filtering mode and the flushing mode. The reversing member 720 includes a connecting portion 721 and a blocking portion 722. The reversing member 720 is connected to an elastic member 740. Under the action of the elastic member 740, the reversing member 720 can be maintained in a position corresponding to the filtering mode.

[0063] In the filtering mode, the water inlet 201 is connected to the water space 601 on the adjacent side of the water distributor 60 and the water isolation ring 203, and the water inlet 201 is separated from the inner circumference of the reversing member 720;

[0064] In flushing mode, on the adjacent side of the water distributor 60 and the water isolation ring 203 , the water inlet 201 is connected to the inner circumference of the reversing member 720 through the connecting portion 721 , and the blocking portion 722 separates the water inlet 201 from the water flow space 601 .

[0065] Specifically, the water-isolating ring 203 and the filter assembly 30 (water distributor 60) are arranged along the axial direction of the water filter chamber 101, and the filter assembly 30 has a hollow structure passing through it along its axial direction for the reversing member 720 to pass through (that is, the water distributor 60 is also configured as a hollow structure), and enables the reversing member 720 to move in the water filter chamber 101 to change the connectivity between different components in the water filter chamber 101, thereby changing the direction of water flow, so that the pre-filter can switch between filtering mode and flushing mode.

[0066] The reversing member 720 is hollow, with one end inserted into the water-isolating ring, thereby connecting its inner circumference to the water outlet 202. The reversing member 720 includes a connecting portion 721 and a blocking portion 722. Both the connecting portion 721 and the blocking portion 722 are hollow. The peripheral wall of the connecting portion 721 has a hole-like structure that connects to the inner side of the reversing member 720. The hole-like structure can communicate with the water inlet 201, and the blocking portion 722 can block the water flow space 601.

[0067] In the filtering mode, the water inlet 201 is connected to the water space 601, and the circumferential porous structure of the connecting part 721 is blocked, so that the filtering flow path between the water inlet 201 and the water filter chamber 101 is connected, and the flushing flow path between the water inlet 201 and the inner circumference of the reversing member 720 is blocked, so that after the raw water enters the water inlet 201, it can directly flow through the water space 601 to the filter assembly 30 for filtration, and flow from outside to inside along the radial direction of the filter assembly 30, thereby filtering the raw water, and then under the action of water pressure, it flows upward and flows out of the water outlet 202 through the inner circumference of the reversing member 720. In the flushing mode, the water inlet 201 is connected to the inner circumference of the reversing member 720 through the connecting portion 721, and the blocking portion 722 separates the water inlet 201 and the water flow space 601, thereby isolating the filtration flow path between the water inlet 201 and the water filter chamber 101, and the flushing flow path between the water inlet 201 and the inner circumference of the reversing member 720 is conducted, so that after the raw water enters from the water inlet 201, it enters the inner circumference of the reversing member 720 through the circumferential porous structure of the connecting portion 721, and then flows to the filter assembly 30 to flush the filter assembly 30, and finally is discharged from the sewage outlet 102.

[0068] Therefore, in this solution, by arranging a water-isolating ring 203 and a filter assembly 30 (water distributor 60) in the water filter chamber 101, and by the movement of the reversing member 720 relative to the filter assembly 30 (water distributor 60) and the water-isolating ring 203, the connectivity between different structures is changed, thereby changing the flow direction of the raw water entering the water inlet 201 and the water flow path in the water filter chamber 101, thereby enabling the pre-filter to switch between the filtering mode and the flushing mode, and realizing the self-flushing of the internal filter assembly 30 of the pre-filter, thereby eliminating the need for manual disassembly and cleaning, facilitating the cleaning of the pre-filter, and thereby increasing the service life of the pre-filter.

[0069] In the filtering mode, the reversing member 720 is in the first position, and in the flushing mode, the reversing member 720 is in the second position. In this embodiment, the reversing member 720 is provided with an elastic member 740, which can maintain the reversing member 720 in the position corresponding to the filtering mode, that is, keep the pre-filter in the first position.

[0070] The connecting portion 721 and the blocking portion 722 are integrally formed, facilitating assembly of the switching member 720 while ensuring its overall strength. This also prevents any installation gap between the connecting portion 721 and the blocking portion 722, which could lead to unexpected water seepage and disrupted water flow. The connecting portion 721 and the blocking portion 722 are axially aligned, with their axes coinciding. This facilitates machining of the switching member 720 and reduces the space required for movement.

[0071] Furthermore, the water isolation ring 203 and the water distributor 60 together form a water flow structure, which is connected to the water inlet 201;

[0072] On the adjacent side of the water distributor 60 and the water isolation ring 203 , in the filtering mode, the water flow structure is isolated from the connecting portion 721 , and in the flushing mode, the water flow structure is connected to the connecting portion 721 .

[0073] Specifically, on the adjacent sides of the water distributor 60 and the water isolation ring 203, the water isolation ring 203 and the water distributor 60 control the connection and disconnection between the water inlet 201 and the connecting portion 721 by controlling the connection and disconnection between the water flow structure and the connecting portion 721. Therefore, the reversing member 720 can move relative to the water flow structure to control the connection and disconnection between the water flow structure and the connecting portion 721. In the embodiment of the present utility model, the water isolation ring 203 and the water distributor 60 are formed separately, and the water flow structure is the gap between the water isolation ring 203 and the water distributor 60;

[0074] In the filtering mode, the baffle 722 is at least located between the water isolation ring 203 and the water distributor 60 , so that the water inlet 201 is connected to the water space 601 ;

[0075] In the flushing mode, the communication portion 721 is at least partially located between the water isolation ring 203 and the water distributor 60 , so that the communication portion 721 is connected to the water inlet, and the blocking portion 722 blocks the water flow space 601 .

[0076] Specifically, the water flow structure is configured as a gap between the water isolation ring 203 and the water distributor 60. At this time, the first position and the second position are set along the axial direction of the reversing member 720, that is, the reversing member 720 switches between the filtering mode and the flushing mode by moving up and down. If the first position is above the second position, the reversing member 720 slides upward to the first position, so that the pre-filter is in the filtering mode (refer to Figure 1 and Figure 2 ), so that the hole structure of the connecting portion 721 is inserted into the water isolation ring 203, so that the connecting portion 721 is blocked, and the corresponding blocking portion 722 also moves upward, so that the blocking portion 722 is separated from the water distributor 60, so as to release the blocking of the water flow space 601, so that the water flow space 601 is connected to the water inlet 201; the pre-filter is switched from the filtering mode to the flushing mode, and the reversing member 720 slides downward (away from the water isolation ring 203) to the second position (refer to Figure 3 and Figure 4 ), the porous structure of the connecting portion 721 is exposed from the edge of the water isolation ring 203, thereby connecting the connecting portion 721 to the water inlet 201. At the same time, the blocking portion 722 moves downward to block the water flow space 601 of the water distributor 60. At this time, if the elastic member 740 is disposed between the reversing member 720 and the water isolation ring 203, the elastic member 740 can be configured as a tension spring; if it is disposed between the reversing member 720 and the filter assembly 30, the elastic member 740 can be configured as a compression spring.

[0077] In other embodiments, the first position is below the second position. At this point, the reversing member 720 slides downward to the first position, placing the pre-filter in filtering mode. This allows the porous structure of the connecting portion 721 to be inserted into the water distributor 60, thereby blocking the connecting portion 721. When the pre-filter switches from filtering mode to flushing mode, the reversing member 720 slides upward to the second position, exposing the porous structure of the connecting portion 721 from the edge of the water distributor 60, thereby connecting the connecting portion 721 to the water inlet 201.

[0078] In other embodiments, the water passing structure can be configured as a through-hole. In one embodiment, the water isolating ring 203 and the water distributor 60 are integrally formed, and the water passing structure can be configured as a through-hole provided in the water isolating ring 203 and the water distributor 60; in another embodiment, the water isolating ring 203 and the water distributor 60 are separately formed, and the water isolating ring 203 and the water distributor 60 are abutted and assembled to form a through-hole.

[0079] And when the water-passing structure is configured as a through-hole, the first position and the second position can be set along the circumference of the reversing member 720, that is, the connection relationship between different structures is changed by rotating the reversing member 720 relative to the water distributor 60 and the water-blocking ring 203 to realize the switching between the filtering mode and the flushing mode. At this time, in the filtering mode, the through-hole (water-passing structure) and the porous structure are circumferentially misaligned. At this time, the elastic member 740 can be configured as a torsion spring; the first position and the second position can also be set along the axial direction of the reversing member 720, that is, the reversing member 720 realizes the switching between the filtering mode and the flushing mode by moving up and down. At this time, in the filtering mode, the through-hole and the porous structure are axially misaligned.

[0080] Among them, the driving force for driving the reversing member 720 to move up and down can be various, such as setting an elastic member 740 between the reversing member 720 and the filter assembly 30, and the elastic member 740 can make the reversing member 720 have a tendency to move upward; the lower end of the corresponding reversing member 720 is connected to a suction cup 730, and the sewage outlet 102 is provided below the water filter chamber 101. When the water inlet 201 and the sewage outlet 102 are opened, the water pressure can be used to give the suction cup 730 a driving force, so that the suction cup 730 overcomes the elastic member 7 40 moves downward due to the elastic potential energy; or the reversing member 720 is threadedly connected to the water-blocking ring 203 or the filter assembly 30, and the reversing member 720 is driven to rotate by the driving structure, thereby moving the reversing member 720 upward or downward; or a telescopic structure is provided in the filter chamber, which can directly push or pull the reversing member 720 to move, thereby driving the reversing member 720 to move upward or downward; at this time, a guide structure is required between the reversing member 720 and the filter assembly 30 and / or the water-blocking ring 203.

[0081] In summary, the technical solution of the present invention is to dispose a water-isolating ring 203, a filter assembly 30, and a water distributor 60 within the water filter chamber 101, and to change the connectivity between the different structures by the movement of the reversing member 720 relative to the filter assembly 30, the water distributor 60, and the water-isolating ring 203, thereby changing the flow direction of the raw water after entering the water inlet 201 and the flow path of the water within the water filter chamber 101, controlling the opening and closing of the filtration flow path and the flushing flow path, thereby switching the pre-filter between the filtration mode and the flushing mode, and achieving self-flushing of the internal filter assembly 30 of the pre-filter, thereby enabling the pre-filter to regularly clean the filter assembly, thereby ensuring the filtration effect of the filter assembly and thereby improving the service life of the pre-filter. Furthermore, by disposing an elastic member 740 within the water filter chamber 101, the elastic member 740 is connected to the reversing member 720, so that the reversing member 720 is maintained in a position corresponding to the filtration mode, thereby achieving self-reset of the pre-filter to the filtration mode, facilitating the switching of the pre-filter between the filtration mode and the flushing mode.

[0082] In an embodiment of the present invention, the ends of the elastic member 740 are respectively connected to the reversing member 720 and the filter assembly 30. Specifically, the elastic member 740 is disposed between the reversing member 720 and the filter assembly 30, such that one end of the elastic member 740 is connected to the reversing member 720 and the other end is connected to the filter assembly 30, thereby facilitating the installation of the elastic member 740. The other end of the elastic member 740 can be connected to the filter portion of the filter assembly 30 or to the water distributor 60.

[0083] The elastic member 740 can be configured as a spring, which not only facilitates the installation of the elastic member 740 but also reduces the interference of the elastic member 740 with the water flow inside the water filter chamber 101. In other embodiments, the elastic member 740 can also be configured as an elastic block or an elastic sleeve. In this case, the elastic member 740 is provided with an escape space for the water flow to pass through.

[0084] Further, refer to Figure 1 and Figure 4 The elastic member 740 is installed between the reversing member 720 and the water distributor 60. Specifically, because water needs to flow between the filtering portion of the filter assembly 30 and the reversing member 720, especially in the flushing mode, the reversing member 720 sprays water from the inner periphery of the filter assembly 30 to the outside thereof to flush the filter assembly 30. Therefore, the presence of the elastic member 740 may affect the impact strength of the water flow. Therefore, the elastic member 740 is provided between the reversing member 720 and the water distributor 60.

[0085] In another embodiment of the present invention, a hollow tube section 723 is provided on the side of the baffle 722 away from the connecting portion 721. The hollow tube section 723 is inserted into the inner circumference of the filter assembly 30, and a second connecting hole 7231 is defined in the peripheral wall of the hollow tube section 723. An elastic member 740 is disposed between the hollow tube section 723 and the filter assembly 30, with one end of the elastic member 740 connected to the hollow tube section 723 and the other end connected to the filter assembly 30. Specifically, the hollow tube section 723 is provided on the side of the baffle 722 away from the connecting portion 721. The hollow tube section 723 is inserted into the inner circumference of the filter assembly 30, thereby directing the water flow within the diverter 720 toward the inner circumference of the filter assembly 30. The hollow tube section 723 extends axially along the filter assembly 30, and a gap is provided between the hollow tube section 723 and the inner circumference of the filter assembly 30 to facilitate movement of the diverter 720 relative to the filter assembly 30. A second communication hole 7231 is defined on the peripheral wall of the hollow tube section 723, which communicates with the inner circumference of the filter assembly 30. An elastic member 740 is disposed between the hollow tube section 723 and the filter assembly 30, with one end of the elastic member 740 connected to the hollow tube section 723 and the other end connected to the filter assembly 30. This facilitates installation of the elastic member 740, and the hollow tube section 723 also serves as a guide for the elastic member 740 to extend and retract.

[0086] In filter mode (see Figure 1), the raw water enters the water filter chamber 101 from the water inlet 201, flows through the water flow space 601 of the water distributor 60 to the filter assembly 30, and flows from the outside to the inside along the radial direction of the filter assembly 30, thereby filtering the raw water. After the filtered raw water enters the inner periphery of the filter assembly 30, part of it enters the hollow pipe section 723 through the second connecting hole 7231, and then flows upward to the water outlet 202 under the action of water pressure, and the other part flows upward from the gap between the hollow pipe section 723 and the inner periphery of the filter assembly 30, and then enters the inner periphery of the reversing member 720 through the first connecting hole 7225, and flows upward to the water outlet 202; in the flushing mode (refer to Figure 3 ), the raw water enters the water filter chamber 101 from the water inlet 201, enters the inner periphery of the reversing member 720 through the connecting portion 721, and continues to flow downward to the hollow pipe section 723, and then is sprayed toward the filter assembly 30 through the second connecting hole 7231. Then, the cleaning water flow is sprayed from the outside to the inside along the radial direction of the filter assembly 30 to carry away impurities on the filter assembly 30, thereby achieving the purpose of flushing the filter assembly 30, and then flows out from the sewage outlet 102.

[0087] See also Figures 1 to 6 In an embodiment of the present invention, the filter assembly 30 is disposed between the reversing member 720 and the water distributor 60 , which can facilitate the installation of the filter assembly 30 .

[0088] When the filter assembly 30 is arranged between the reversing member 720 and the water distributor 60, in an embodiment of the present utility model, the barrier portion 722 includes an annular main body 7221 extending axially along the reversing member 720, and a barrier skirt 7222 arranged on the outer periphery of the annular main body 7221. The barrier skirt 7222 covers the water space 601 in the flushing mode, and one end of the elastic member 740 is located on the inner side of the annular main body 7221.

[0089] Specifically, the baffle portion 722 includes an annular main body 7221 extending axially along the reversing member 720. The annular main body 7221 is axially connected to the connecting portion 721 and communicates with the inner circumference of the connecting portion 721. A baffle skirt 7222 is disposed around the outer circumference of the annular main body 7221. During flushing, the baffle skirt 7222 directly covers the water inlet side of the water flow space 601, thereby blocking the water flow space 601 and facilitating control of the flow path between the water inlet 201 and the water filter chamber 101. One end of the elastic member 740 is disposed on the inner side of the annular main body 7221, which helps ensure the stable installation of the elastic member 740, reduces the possibility of accidents with the elastic member 740, and further reduces the interference of the elastic member 740 with the water flow within the water filter chamber 101.

[0090] In other embodiments, the elastic member 740 may also be disposed outside the annular main portion 7221. In this case, the end of the elastic member 740 facing the communication portion 721 may be sleeved on the annular main portion 7221, thereby facilitating the annular main portion 7221 to guide the elastic member 740 in its expansion and contraction. In this case, the elastic member 740 may not be directly connected to the barrier skirt 7222. One end of the elastic member 740 may abut against the side of the barrier skirt 7222 facing the water distributor 60.

[0091] When the elastic member 740 is disposed on the inner side of the annular main body 7221, in the embodiment of the present invention, please refer to Figures 1 to 6 A first guide portion 7226 is provided on the inner side of the annular main body 7221, and one end of the elastic member 740 close to the connecting portion 721 is sleeved on the first guide portion 7226. Specifically, the first guide portion 7226 is provided on the inner side of the annular main body 7221, so that the outer side of the first guide portion 7226 and the inner side of the annular main body form a guide annular groove for the installation of the elastic member 740, thereby facilitating the expansion and contraction of the elastic member 740 and eliminating the need for an additional fixing structure to fix the elastic member 740. This not only facilitates the installation of the elastic member 740, but also ensures the installation stability of the elastic member 740.

[0092] In another embodiment of the present invention, a water passage 7224 is further provided on the inner circumference of the annular main body 7221. The water passage 7224 is provided with a first communication hole 7225. In the filtering mode, the first communication hole 7225 communicates with the inner circumference of the filter assembly 30. The elastic member 740 is annularly disposed between the water passage 7224 and the annular main body 7221. Specifically, the water passage 7224 is configured as a first guide portion 7226. Thus, the water passage 7224 and the annular main body 7221 not only form a guide annular groove together with the annular main body 7221 to guide the elastic member 740, but also connect the inner circumference of the reversing member 720 with the inner circumference of the filter assembly 30, thereby further adjusting the flow characteristics of the water flow within the water filter chamber 101 and improving the flow effects of the filtering and flushing paths.

[0093] To facilitate the installation of the elastic member 740 and the water distributor 60, in the embodiment of the present utility model, the water distributor 60 is provided with a mounting annular groove 602 that communicates with the inner circumference of the filter assembly 30. The water flow space 601 is arranged around the outer circumference of the mounting annular groove 602. The annular main body 7221 is slidably inserted into the mounting annular groove 602, and one end of the elastic member 740 is inserted into the mounting annular groove 602. Specifically, the bottom of the mounting annular groove 602 is provided with a through hole (in the inner circumference of the mounting annular groove 602) that communicates with the interior of the filter assembly 30. The reversing member 720 is slidably inserted into the mounting annular groove 602, that is, the annular main body 7221 is slidably inserted into the mounting annular groove 602. On the one hand, the annular main body 7221 can guide the sliding of the reversing member 720 relative to the water distributor 60. On the other hand, the annular main body 7221 is inserted into the mounting annular groove 602, and together with the mounting annular groove 602, it forms a closed space, which helps to block the direct connection between the through hole at the bottom of the mounting annular groove 602 and the water inlet 201. Therefore, the interior of the filter assembly 30 can only communicate with the inner periphery of the reversing member 720 through the through hole, and then connect to the water outlet 202, reducing the possibility of the through hole connecting to the water inlet 201. The water flow space 601 is arranged around the outer periphery of the mounting annular groove 602, so that the water flow space 601 and the mounting annular groove 602 are separated. The mounting annular groove 602 is connected to the inner periphery of the filter assembly 30, and the water flow space 601 is connected to the outer periphery of the filter assembly 30.

[0094] When the elastic member 740 is inserted into the mounting ring groove 602, in the embodiment of the present utility model, please refer to Figures 1 to 6 A second guide portion 605 is provided on the inner side of the mounting annular groove 602, and the end of the elastic member 740 away from the connecting portion 721 is sleeved on the second guide portion 605. Specifically, the second guide portion 605 is provided on the inner side of the annular main body 7221, so that the outer side of the second guide portion 605 and the inner side of the mounting annular groove 602 form another guide annular groove for the installation of the elastic member 740, thereby facilitating the expansion and contraction of the elastic member 740 and eliminating the need for an additional fixing structure to fix the elastic member 740. This not only facilitates the installation of the elastic member 740, but also ensures the installation stability of the elastic member 740.

[0095] In another embodiment of the present invention, a water passage 7224 is further provided on the inner periphery of the annular main body 7221. In the filtering mode, the water passage 7224 is in communication with the inner periphery of the filter assembly 30.

[0096] The bottom of the mounting ring groove 602 is provided with an inwardly protruding blocking portion 604 . In the flushing state, the blocking portion 604 blocks the communication between the water flow portion 7224 and the inner periphery of the filter assembly 30 .

[0097] Specifically, the peripheral wall of the water-passing portion 7224 is often provided with a first connecting hole 7225, so that the inner periphery of the filter assembly 30 can be connected to the first connecting hole 7225 through the gap between the water-passing portion 7224 and the annular main body 7221, thereby facilitating the flow of filtered raw water into the inner periphery of the reversing member 720. In the filtering mode (refer to Figure 1 ), the water portion 7224 and the through hole gap at the bottom of the mounting ring groove 602 are set to connect the inner periphery of the filter assembly 30; in the flushing mode (refer to Figure 3 ), the edge of the through hole can abut against the lower edge of the first communicating hole 7225 to eliminate the gap between the water passing portion 7224 and the bottom of the mounting ring groove 602, thereby blocking the communication between the first communicating hole 7225 and the inner periphery of the filter assembly 30.

[0098] In flushing mode, the diverter 720 sprays water toward the inner periphery of the filter assembly 30 to flush the filter assembly 30, requiring sufficient water pressure. If the inner periphery of the diverter 720 were connected to the inner periphery of the filter assembly 30 through the first connecting hole 7225, this could cause the water flow to disperse, affecting the impact of the water flow on the filter assembly 30. Therefore, by blocking the connection between the first connecting hole 7225 and the inner periphery of the filter assembly 30, the inner periphery of the diverter 720 is directly connected to the inner periphery of the filter assembly 30 to ensure the impact force of the water flow. In filtering mode, the first connecting hole 7225 increases the water flow area of ​​the water flow portion 7224, thereby increasing the water flow rate from the inner periphery of the filter assembly 30.

[0099] The bottom of the mounting ring groove 602 is provided with an inwardly protruding blocking portion 604, which can abut against the lower edge of the first connecting hole 7225 in the flushing state to block the connection between the first connecting hole 7225 and the interior of the filter assembly 30, thereby sealing the first connecting hole 7225 in the flushing state. If the blocking portion 604 blocks the connection between the first connecting hole 7225 and the inner circumference of the filter assembly 30 by sealing the first connecting hole 7225, once a circumferential offset occurs between the water distributor 60 and the reversing member 720, the blocking portion 604 may not be smoothly inserted into the first connecting hole 7225, thereby causing the blocking portion 604 to fail. Therefore, the blocking portion 604 is arranged to abut the lower edge of the first connecting hole 7225, thereby eliminating the gap between the water flow portion 7224 and the blocking portion 604 to block the water flow, and the blocking portion 604 is arranged in an annular shape as a whole, and the end of the elastic member 740 away from the water flow portion 7224 is sleeved on the blocking portion 604, so that the blocking portion 604 can further serve as a guide for the extension and contraction of the elastic member 740.

[0100] Furthermore, one end of the elastic member 740 is sleeved on the water passing portion 7224, and the other end is sleeved on the blocking portion 604. Thus, both opposite ends of the elastic member 740 have guide structures, thereby improving the installation stability of the elastic member.

[0101] The present invention also provides a water system including a prefilter. The specific structure of the prefilter is similar to that of the above-described embodiments. Since the present water system utilizes all of the technical solutions of all of the above-described embodiments, it at least possesses all of the beneficial effects of the technical solutions of the above-described embodiments, and therefore will not be further detailed here. The water system includes at least the relevant components from the prefilter to the water supply terminal. For example, the water system may include household appliances such as a water heater, a dishwasher, and a water dispenser, as well as accessories such as water pipes for household water supply.

[0102] The above are merely exemplary embodiments of the present invention and are not intended to 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 applications 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 shell has a water filter cavity, and a water inlet and a water outlet connected to the water filter cavity. The shell is provided with a water isolation ring between the water inlet and the water outlet, the water inlet is connected to the outer peripheral side of the water isolation ring, and the water outlet is connected to the inner peripheral side of the water isolation ring; A filter assembly is provided in the water filter cavity and is arranged opposite to the water isolation ring. The filter assembly includes a water distributor, which is provided at one end of the filter assembly close to the water isolation ring and forms a water flow space communicating with the water filter cavity. as well as A reversing member is provided in a hollow shape, and is movably inserted into the filter assembly and the water-isolating ring to switch the pre-filter between a filtering mode and a flushing mode. The reversing member includes a connecting portion and a blocking portion. The reversing member is connected to an elastic member. Under the action of the elastic member, the reversing member can be maintained in a position corresponding to the filtering mode; In the filtering mode, on the adjacent side of the water distributor and the water isolation ring, the water inlet is connected to the water flow space, and the water inlet is separated from the inner circumference of the reversing member; In the flushing mode, on the adjacent side of the water distributor and the water isolation ring, the water inlet is connected to the inner circumference of the reversing member through the connecting portion, and the blocking portion separates the water inlet from the water flow space.

2. The prefilter according to claim 1, wherein Two ends of the elastic member are respectively connected to the reversing member and the filter assembly.

3. The prefilter according to claim 2, wherein: The elastic member is installed between the reversing member and the water distributor.

4. The prefilter according to claim 1, wherein The barrier portion includes an annular main body extending axially along the reversing member, and a barrier skirt arranged around the outer circumference of the annular main body. The barrier skirt covers the water flow space in the flushing mode, and one end of the elastic member is located on the inner side of the annular main body.

5. The pre-filter according to claim 4, characterized in that A first guide portion is provided on the inner side of the annular main body portion, and the elastic member is sleeved on the first guide portion.

6. The prefilter according to claim 4, characterized in that The inner periphery of the annular main body is further provided with a water passing portion, and the water passing portion is provided with a first connecting hole. In the filtering mode, the first connecting hole is connected to the inner periphery of the filter assembly, and the elastic member is arranged between the water passing portion and the annular main body.

7. The prefilter according to claim 1, wherein: The water distributor is provided with an installation ring groove communicating with the inner circumference of the filter assembly, the water flow space is arranged on the outer circumference of the installation ring groove, the reversing member is slidably inserted into the installation ring groove, and one end of the elastic member is inserted into the installation ring groove.

8. The pre-filter according to claim 7, characterized in that A second guide portion is provided on the inner side of the mounting ring groove, and the elastic member is sleeved on the second guide portion.

9. The prefilter according to claim 7, wherein: The inner periphery of the baffle is further provided with a water passage, and in the filtering mode, the water passage is connected to the inner periphery of the filtering assembly; A blocking portion protruding inward is provided at the bottom of the mounting ring groove. In the flushing state, the blocking portion blocks the communication between the water flow portion and the inner periphery of the filter assembly.

10. The pre-filter according to claim 9, characterized in that One end of the elastic member is sleeved on the water passing portion, and the other end is sleeved on the blocking portion.

11. The prefilter according to claim 2, wherein: The elastic member is installed between the blocking portion and the water distributor.

12. The pre-filter according to claim 2, characterized in that A hollow pipe section is provided on the side of the blocking portion away from the connecting portion, the hollow pipe section is inserted into the inner circumference of the filter assembly, and a second connecting hole is provided on the peripheral wall of the hollow pipe section. One end of the elastic member is connected to the hollow pipe section, and the other end is connected to the filter assembly.

13. The prefilter according to any one of claims 1 to 12, characterized in that The elastic member is configured as a spring.

14. The prefilter according to any one of claims 1 to 12, characterized in that The water isolation ring and the water distributor together form a water flow structure, and the water flow structure is connected to the water inlet; On the adjacent side of the water distributor and the water isolation ring, in the filtering mode, the water flow structure is separated from the connecting portion, and in the flushing mode, the water flow structure is connected to the connecting portion.

15. The pre-filter according to claim 14, characterized in that The water separator and the water distributor are formed separately, and the water flow structure is the gap between the water separator and the water distributor; In the filtering mode, the baffle is located at least between the water isolation ring and the water distributor, so that the water inlet is connected to the water flow space; In the flushing mode, the connecting portion is at least partially located between the water isolation ring and the water distributor, so that the connecting portion is connected to the water inlet, and the blocking portion blocks the water flow space.

16. The pre-filter according to any one of claims 1 to 12, characterized in that The reversing member is axially movable relative to the housing, and the communicating portion and the blocking portion are distributed along the axial direction.

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

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