Pre-filter with shunting waterway

Abstract

The utility model provides a pre-filter with a shunting waterway. The pre-filter comprises a filter shell and a filter element positioned in the filter shell, a first water inlet and a first water outlet are respectively formed in two ends of the filter shell; a second water inlet and a second water outlet are formed in the two ends of the filter element respectively, and the second water inlet and the second water outlet are correspondingly connected with the first water inlet and the first water outlet respectively; a third water inlet communicated with the second water inlet and a third water outlet communicated with the second water outlet are formed in the side wall of the filter element; a shunting water path is formed between the side wall of the filter element and the inner wall of the filter shell, and the third water inlet and the third water outlet are both communicated with the shunting water path. According to the utility model, the problems that the filter material is released too much and consumed too quickly in unit time can be solved, and meanwhile, the problems that the water resistance is increased and the water flow is reduced after the filter element is filled with the filter material can be solved.

Description

Technical Field

[0001] The utility model relates to a filter, in particular to a pre-filter with a diverter waterway. Background Art

[0002] With the upgrading of consumption and demand, people's requirements for the quality of life are constantly increasing, and the requirements for the environment of the whole house are also getting higher and higher. Most families will choose to install water purifiers when decorating new houses. Most industrial equipment will also choose filters to pre-treat water. It can be seen that users' requirements for bathing water quality are gradually increasing.

[0003] Installing a filter at the water inlet of a gas water heater to pre-treat the water is a common method for treating bathing water quality, and the technology of filter materials, filter media, structure, etc. has gradually matured. There are many types of filters currently used in water heaters, and some filter structures have the following defects: first, the filter media is released too much per unit time and the filter media is consumed too quickly; second, the water resistance increases and the water flow decreases after the filter element is filled with filter media.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a pre-filter with a diverter waterway, which can solve the problem of excessive filter material release and rapid filter material consumption per unit time, and can also solve the problem of increased water resistance and reduced water flow after the filter element is filled with filter material.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pre-filter with a diverting waterway comprises a filter housing and a filter element located in the filter housing;

[0008] The filter housing is provided with a first water inlet and a first water outlet at both ends thereof;

[0009] A second water inlet and a second water outlet are respectively provided at both ends of the filter element, and the second water inlet and the second water outlet are respectively connected to the first water inlet and the first water outlet accordingly; the side wall of the filter element is provided with a third water inlet connected to the second water inlet and a third water outlet connected to the second water outlet; a diversion waterway is formed between the side wall of the filter element and the inner wall of the filter housing, and the third water inlet and the third water outlet are both connected to the diversion waterway.

[0010] According to one embodiment of the utility model, a connecting pipe is provided in the first water inlet, a regular polygonal positioning plate is provided on the outer periphery of the middle part of the connecting pipe, and external threads are provided at both ends of the connecting pipe;

[0011] A raised positioning ring is provided on the inner wall of the first water inlet, which divides the first water inlet into a first cavity, a second cavity and a third cavity from the outside to the inside; the positioning plate is located in the first cavity, and the shape of the first cavity corresponds to the shape of the positioning plate, one end of the connecting pipe passes through the second cavity and the third cavity, and is sleeved with a positioning nut; the end face of the positioning nut abuts against the positioning ring.

[0012] According to an embodiment of the utility model, the positioning nut is cylindrical and is located in the third cavity, and the shape of the third cavity corresponds to the shape of the positioning nut; a rotation operation hole is provided on the inner side of the top of the positioning nut.

[0013] According to an embodiment of the present utility model, the rotation operation hole is a regular polygon.

[0014] According to an embodiment of the utility model, the second cavity is provided with a first sealing ring, and the first sealing ring is sleeved between the connecting pipe and the positioning ring.

[0015] According to an embodiment of the utility model, a filter screen is provided in the second water inlet, and the filter screen is located outside the third water inlet.

[0016] According to one embodiment of the utility model, the filter element includes a filter element housing, a filter material mounting hole plate is provided in the filter element housing, and the filter material mounting hole plate is arranged on the inner side of the second water inlet; filter material is filled between the filter material mounting hole plate and the filter element housing; the third water inlet is located on the outer side of the filter material mounting hole plate.

[0017] According to one embodiment of the utility model, the filter element housing comprises an upper filter element shell and a lower filter element shell, and a concave-convex snap-fit ​​structure is provided on the connecting surface between the upper filter element shell and the lower filter element shell.

[0018] According to an embodiment of the present utility model, the filter housing includes an upper filter shell and a lower filter shell, which are connected by threads.

[0019] According to one embodiment of the utility model, a second sealing ring is provided between the connecting surfaces of the filter upper shell and the filter lower shell.

[0020] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0021] 1) The pre-filter with a diverting waterway provided in the embodiment of the utility model can extend the service life of the filter material in the filter element because the diverting waterway will divert a part of the water, so that not all the incoming water is filtered through the filter element. The diverting waterway can slow down the scouring of the filter element filter material by the water flow, thereby slowing down the consumption of the filter material and extending the service life of the filter element. The pre-filter with a diverting waterway provided in the embodiment of the utility model can solve the problems of excessive release of filter material and too fast consumption of filter material per unit time. In addition, since the water in the diverting waterway is not filtered through the filter material, the water resistance of the entire filter can be reduced, and the water flow rate of the entire filter can be increased, thereby solving the problem of increased water resistance and reduced water flow rate after the filter element of the existing filter is filled with filter material.

[0022] 2) The pre-filter with a diverter waterway provided in the embodiment of the utility model, when installing the connecting pipe, since the first cavity of the first water inlet of the filter housing corresponds to the shape of the positioning plate of the connecting pipe, the positioning plate will not rotate at will after being installed in the first cavity of the first water inlet of the filter housing, and no special tools are required to fix the connecting pipe during the process of tightening the thread of the positioning nut and the connecting pipe, which facilitates the installation and disassembly of the connecting pipe. In addition, in this embodiment, the positioning nut and the connecting pipe are matched with external threads, which can increase the flow cross-sectional area and thus increase the water flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0024] Figure 1 A schematic diagram of the structure of a pre-filter with a diverter waterway provided in an embodiment of the utility model;

[0025] Figure 2 A cross-sectional schematic diagram of a pre-filter with a diverting waterway provided in an embodiment of the utility model;

[0026] Figure 3 A top view of a pre-filter with a diverter waterway provided in an embodiment of the utility model;

[0027] Figure 4 A bottom view of a pre-filter with a diverter waterway provided in an embodiment of the utility model;

[0028] Figure 5 An exploded schematic diagram of a pre-filter with a diverting waterway provided in an embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the principle of a pre-filter with a diverter waterway provided in an embodiment of the utility model;

[0030] Figure 7 A schematic structural diagram of a filter housing of a pre-filter with a diverting waterway provided in an embodiment of the utility model;

[0031] Figure 8 A schematic cross-sectional view of a filter housing of a pre-filter with a diverting waterway provided in an embodiment of the utility model;

[0032] Fig. 9 A schematic diagram of the structure of a filter element of a pre-filter with a diverting waterway provided in an embodiment of the utility model;

[0033] Fig.10 A schematic cross-sectional view of a filter element of a pre-filter with a diverter waterway provided in an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] 1. Filter housing; 11. First water inlet; 110. Positioning ring; 111. First cavity; 112. Second cavity; 113. Third cavity; 12. First water outlet; 13. Filter upper housing; 14. Filter lower housing; 2. Filter element; 21. Second water inlet; 22. Second water outlet; 23. Third water inlet; 24. Third water outlet; 25. Filter screen; 26. Filter element housing; 261. Filter element upper housing; 262. Filter element lower housing; 27. Filter material mounting orifice plate; 28. Filter material; 3. Diversion waterway; 4. Connecting pipe; 41. Positioning plate; 42. Positioning nut; 5. First sealing ring; 6. Second sealing ring. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0037] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] like Figure 1-Figure 5 As shown, an embodiment of the utility model provides a pre-filter with a diverter waterway, comprising a filter housing 1 and a filter element 2 located in the filter housing 1 .

[0039] like Figure 2 , Figure 7 , Figure 8 As shown, the filter housing 1 has a first water inlet 11 and a first water outlet 12 at both ends. The first water inlet 11 is used to receive tap water, and the first water outlet 12 is used to deliver filtered tap water to a water heater or other water-using device. Figure 2 , Fig. 9 , Fig.10 As shown, the filter element 2 is provided with a second water inlet 21 and a second water outlet 22 at both ends, and the second water inlet 21 and the second water outlet 22 are respectively connected to the first water inlet 11 and the first water outlet 12. The side wall of the filter element 2 is provided with a third water inlet 23 connected to the second water inlet 21 and a third water outlet 24 connected to the second water outlet 22. A diverter waterway 3 is formed between the side wall of the filter element 2 and the inner wall of the filter housing 1, and the third water inlet 23 and the third water outlet 24 are both connected to the diverter waterway 3.

[0040] like Figure 6As shown, the direction of water flow is as shown by the arrow. Unfiltered water passes through the first water inlet 11, the second water inlet 21, the inside of the filter element 2, the second water outlet 22, and the first water outlet 12 in sequence to form a mainstream waterway. After the water passes through the mainstream waterway, the filter element 2 is used to filter the water. At the same time, after the water enters the second water inlet 21, it also flows into the diverter waterway 3 from the third water inlet 23, and flows into the second water outlet 22 from the third water outlet 24, and merges into the mainstream waterway. Since the diverter waterway 3 will divert part of the water, not all incoming water is filtered through the filter element 2, thereby extending the service life of the filter material in the filter element 2. The diverter waterway 3 can slow down the scouring of the filter material in the filter element 2 by the water flow, thereby slowing down the consumption of the filter material and extending the service life of the filter element 2. The pre-filter with a diverter waterway provided in the embodiment of the utility model can solve the problem of excessive release of filter material and excessive consumption of filter material per unit time. In addition, since the water in the diverting waterway 3 is not filtered by the filter material, the water resistance of the entire filter can be reduced, the water flow of the entire filter can be increased, and the problem of increased water resistance and reduced water flow caused by filling the filter material in the existing filter element can be solved.

[0041] The existing filter has a small inlet cross-section at the water inlet end and is inconvenient to install (an inner fastener needs to be embedded in another outer fastener, resulting in a small inlet cross-section, and the embedding process requires the use of tools to fix the outer fastener, resulting in inconvenient operation). In order to solve the above problems, Figure 5 As shown, in one embodiment of the utility model, a connecting pipe 4 is provided in the first water inlet 11, and a positioning plate 41 in the shape of a regular polygon is provided on the outer periphery of the middle part of the connecting pipe 4, such as a regular triangle, square, regular pentagon, regular hexagon, etc. Both ends of the connecting pipe 4 are provided with external threads, wherein the external threads at the outer end are used to connect the water inlet pipe of the tap water. Figure 2 , Figure 7 , Figure 8As shown, a raised positioning ring 110 is provided on the inner wall of the first water inlet 11, and the first water inlet 11 is divided into a first cavity 111, a second cavity 112 and a third cavity 113 from outside to inside. The positioning plate 41 is located in the first cavity 111, and the shape of the first cavity 111 corresponds to the shape of the positioning plate, and the positioning plate 41 abuts against the positioning ring 110, and the positioning ring 110 limits the movement of the connecting pipe 4 in the direction of the third cavity 113 through the positioning plate 41. One end of the connecting pipe 4 passes through the second cavity 112 and the third cavity 113 in sequence, and is sleeved with a positioning nut 42. The positioning nut 42 is threadedly connected to one end of the connecting pipe 4, and the end face of the positioning nut 42 abuts against the positioning ring 110, and the positioning ring 110 limits the direction and movement of the connecting pipe 4 in the first cavity 111 through the positioning nut 42. The connection pipe 4 can be fixed in the first water inlet 11 by the positioning plate 41 and the positioning nut 42 respectively abutting against the two sides of the positioning ring 110. One end of the connection pipe 4 is located in the third cavity 113 for connecting the positioning nut 42, and the other end of the connection pipe 4 is located outside the first cavity 111 for connecting the tap water inlet pipe.

[0042] like Figure 2 As shown, the pre-filter with a diverting waterway provided in this embodiment, when installing the connecting pipe 4, since the first cavity 111 of the first water inlet 11 of the filter housing 1 corresponds to the shape of the positioning plate 41 of the connecting pipe 4, the positioning plate 41 will not rotate at will after being installed in the first cavity 111 of the first water inlet 11 of the filter housing 1, and no special tools are required to fix the connecting pipe during the process of tightening the thread of the positioning nut 42 and the connecting pipe 4, which facilitates the installation and disassembly of the connecting pipe 4. In addition, in this embodiment, the positioning nut 42 and the connecting pipe 4 are matched with external threads, which can increase the flow cross-sectional area and thus increase the water flow rate.

[0043] Specifically, the positioning nut 42 is cylindrical and is located in the third cavity 113, and the shape of the third cavity 113 corresponds to the shape of the positioning nut 42 to reduce the gap between the positioning nut 42 and the third cavity 113. Since the outer periphery of the positioning nut 42 is circular and the gap between it and the inner wall of the third cavity 113 is very small, it is impossible to use a tool such as a wrench to rotate the positioning nut 42. In this embodiment, a rotation operation hole is provided on the inner side of the top of the positioning nut 42, so that a tool such as a hexagonal wrench can be inserted into the rotation operation hole to rotate the positioning nut 42. The rotation operation hole can be a regular polygon, such as an equilateral triangle, a square, a regular pentagon, a regular hexagon, etc.

[0044] In order to seal the connection pipe 4 and the first water inlet 11, Figure 2As shown, the second cavity 112 is provided with a first sealing ring 5, and the first sealing ring 5 is sleeved between the connecting pipe 4 and the positioning ring 110. The first sealing ring 5 can be made of nitrile rubber, but it is not excluded that it can be made of other rubber materials.

[0045] In one embodiment of the present invention, Fig. 9 , Fig.10 As shown, a filter screen 25 is provided in the second water inlet 21 of the filter element 2, and the filter screen 25 is located outside the third water inlet 23, and performs preliminary filtration on the tap water entering the second water inlet 21 of the filter element 2. The filter screen 25 can be a 100-mesh filter screen, which can filter out large-size sediment, impurities, etc. In this embodiment, the filter screen 25 can be made of stainless steel of SUS304 grade or above, but it is not excluded that it can be made of other engineering plastic materials.

[0046] In one embodiment of the present invention, Figure 2 , Fig. 9 , Fig.10 As shown, the filter element 2 includes a filter element housing 26, a filter material mounting orifice plate 27 is provided in the filter element housing 26, the filter material mounting orifice plate 27 is arranged on the inner side of the second water inlet 21, and a filter material 28 for purifying water is filled between the filter material mounting orifice plate 27 and the filter element housing 26. The third water inlet 23 is located on the outer side of the filter material mounting orifice plate 27. After filtering by the filter material 28, the water entering the filter element 2 can be finely filtered to filter out impurities and harmful substances with smaller particle sizes. In this embodiment, the filter material 28 can be a scale inhibitor containing active groups (MSAP, FOF, etc.) or a physical scale inhibitor (copper-based catalyst alloy, KDF, etc.). The preferred scale inhibitors in this embodiment are MSAP and copper-based catalyst alloy. After adding the scale inhibitor, the water quality after heating has a low degree of precipitation of scale such as calcium carbonate, and it is not easy to form soap scum attached to the surface of the skin.

[0047] Furthermore, if Fig. 9 , Fig.10 As shown, the filter cartridge housing 26 includes a filter cartridge upper shell 261 and a filter cartridge lower shell 262, and the connection surface between the filter cartridge upper shell 261 and the filter cartridge lower shell 262 is provided with a concave-convex snap-fit ​​structure. For example, a protrusion is provided on the bottom side of the filter cartridge upper shell 261, and a corresponding depression is provided on the top side of the filter cartridge lower shell 262. Through the concave-convex snap-fit ​​structure, the filter cartridge upper shell 261 and the filter cartridge lower shell 262 can be quickly disassembled to facilitate the replacement of the internal filter material 28. In this embodiment, the second water inlet 21 is provided on the filter cartridge lower shell 262; the second water outlet 22 is provided on the filter cartridge upper shell 261. In this embodiment, the filter cartridge upper shell 261 and the filter cartridge lower shell 262 can be made of PP plus 30% GF, but it is not excluded that other plastics, alloys and other materials can be used for manufacturing.

[0048] In one embodiment of the present invention, Figure 7 , Figure 8 As shown, the filter housing 1 includes a filter upper shell 13 and a filter lower shell 14, which are connected by threads. Through the threaded connection, the filter upper shell 13 and the filter lower shell 14 can be quickly disassembled to facilitate the replacement of the internal filter element 2, and the connection stability between the filter upper shell 13 and the filter lower shell 14 can be guaranteed. Further, a second sealing ring 6 is provided between the connecting surface of the filter upper shell 13 and the filter lower shell 14 to prevent water from seeping out from the connection between the two, and solve the problem of water leakage caused by insufficient sealing performance or insufficient pressure bearing capacity of the existing filter housing. The second sealing ring 6 can be made of nitrile rubber, but it is not excluded that other rubber materials can be used for manufacturing. In the present embodiment, the first water inlet 11 is arranged at the bottom of the filter lower shell 14, and the first water outlet 12 is arranged at the top of the filter upper shell 13. In this embodiment, the filter housing 1 can be made of PA66+GF30 or transparent PC material, but it does not exclude the possibility of manufacturing it with other metal materials; the filter upper shell 13, the connecting pipe 4, and the positioning nut 42 can be made of copper material and nickel plating process, but it does not exclude the possibility of manufacturing it with other plastics, alloys and other materials.

[0049] When installing the pre-filter with a diverter waterway provided by the embodiment of the utility model, first, the first sealing ring 5 is inserted into the top of the positioning plate 41 of the connecting pipe 4, and the positioning plate 41 is inserted into the first cavity 111 of the first water inlet 11 of the filter lower shell 14; the positioning nut 42 is placed in the filter housing 1, and the positioning nut 42 is tightened with the upper end of the connecting pipe 4 using a hexagonal tool; because the shape of the first cavity 111 corresponds to the positioning plate 41, the connecting pipe 4 is matched with the filter housing 1, and during the process of tightening the positioning nut 42, the position of the connecting pipe 4 will not move or rotate at will, and the positioning nut 42 can be tightened with the upper end of the connecting pipe 4 and the connecting pipe 4 can be fixed to the lower end of the filter housing 1 without using other tools. The filter element upper shell 261 and the filter element lower shell 262 are clamped together by the protrusion of the filter element upper shell 261 and the recess of the filter element lower shell 262. After assembly, the filter element 2 is placed in the filter housing 1; finally, the two second sealing rings 6 are inserted into the filter lower shell 14, and the filter upper shell 13 and the filter lower shell 14 are tightened, and the filter installation is completed.

[0050] like Figure 6As shown, after the water flows into the first water inlet 11 of the filter housing 1, it enters the second water inlet 21 of the filter element 2 through the filter screen 25 set at the bottom of the filter element 2. At this time, the water flow is divided into two paths, one is the mainstream waterway, which directly enters the inner cavity of the filter element 2 through the small holes of the filter material mounting orifice plate 27 of the filter element 2 to release the filter material 28, and then flows out through the second water outlet 22 of the filter element housing 26, and finally flows out from the first water outlet 12 of the filter housing 1; the second path is the diversion waterway 3, which enters the channel of the diversion waterway 3 through the third water inlet 23 set at the bottom of the filter element housing 26, and then merges into the second water outlet 22 of the filter element housing 26 through the third water outlet 24 opened above the filter element housing 26, and finally flows out from the first water outlet 12 of the filter housing 1 after merging with the water flow of the middle mainstream waterway.

[0051] Compared with existing products, the pre-filter with a diversion waterway provided in the embodiment of the utility model has a large water flow path and a small filter element volume. At the same time, it has a diversion effect to achieve the effect of slow release of the filter element. It can filter large-sized mud, impurities, etc., to achieve scale prevention and purification of bathing water, and the water quality is not easy to produce soap scum.

[0052] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pre-filter with a diverter waterway, characterized in that: It comprises a filter housing (1) and a filter element (2) located in the filter housing (1); The filter housing (1) is provided with a first water inlet (11) and a first water outlet (12) at both ends thereof; The filter element (2) is provided with a second water inlet (21) and a second water outlet (22) at both ends, and the second water inlet (21) and the second water outlet (22) are respectively connected to the first water inlet (11) and the first water outlet (12) correspondingly; the side wall of the filter element (2) is provided with a third water inlet (23) connected to the second water inlet (21) and a third water outlet (24) connected to the second water outlet (22); a diverting waterway (3) is formed between the side wall of the filter element (2) and the inner wall of the filter housing (1), and the third water inlet (23) and the third water outlet (24) are both connected to the diverting waterway (3).

2. The pre-filter with diverter waterway according to claim 1, characterized in that: A connecting pipe (4) is provided in the first water inlet (11), a regular polygonal positioning plate (41) is provided on the outer periphery of the middle part of the connecting pipe (4), and both ends of the connecting pipe (4) are provided with external threads; The inner wall of the first water inlet (11) is provided with a raised positioning ring (110), which divides the first water inlet (11) into a first cavity (111), a second cavity (112) and a third cavity (113) from the outside to the inside; the positioning plate (41) is located in the first cavity (111), and the shape of the first cavity (111) corresponds to the shape of the positioning plate (41); one end of the connecting pipe (4) passes through the second cavity (112) and the third cavity (113), and is sleeved with a positioning nut (42); the end face of the positioning nut (42) abuts against the positioning ring (110).

3. The pre-filter with diverter waterway according to claim 2, characterized in that: The positioning nut (42) is cylindrical and is located in the third cavity (113), and the shape of the third cavity (113) corresponds to the shape of the positioning nut (42); a rotation operation hole is provided on the inner side of the top of the positioning nut (42).

4. The pre-filter with diverter waterway according to claim 3, characterized in that: The rotation operation hole is in the shape of a regular polygon.

5. The pre-filter with diverter waterway according to claim 2, characterized in that: The second cavity (112) is provided with a first sealing ring (5), and the first sealing ring (5) is sleeved between the connecting pipe (4) and the positioning ring (110).

6. The pre-filter with diverter waterway according to any one of claims 1 to 5, characterized in that: A filter screen (25) is provided inside the second water inlet (21), and the filter screen (25) is located outside the third water inlet (23).

7. The pre-filter with diverter waterway according to claim 6, characterized in that: The filter element (2) comprises a filter element housing (26), a filter material mounting hole plate (27) is provided in the filter element housing (26), and the filter material mounting hole plate (27) is arranged on the inner side of the second water inlet (21); filter material (28) is filled between the filter material mounting hole plate (27) and the filter element housing; and the third water inlet (23) is located on the outer side of the filter material mounting hole plate (27).

8. The pre-filter with diverter waterway according to claim 7, characterized in that: The filter element housing (26) comprises a filter element upper shell (261) and a filter element lower shell (262), and a concave-convex buckle structure is provided on the connecting surface between the filter element upper shell (261) and the filter element lower shell (262).

9. The pre-filter with diverter waterway according to claim 8, characterized in that: The filter housing (1) comprises an upper filter housing (13) and a lower filter housing (14), which are connected via threads.

10. The pre-filter with diverter waterway according to claim 9, characterized in that: A second sealing ring (6) is provided between the connection surfaces of the filter upper shell (13) and the filter lower shell (14).

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