A domestic filter

Abstract

The utility model provides a kind of domestic filter, including filter body, preferably, filter body side end is connected with four-way valve, four-way valve includes water inlet one, direct current water outlet, filter water outlet and backflush inlet, four-way valve middle is provided with valve core, filter body includes water inlet two and water outlet two, water outlet two side end is also provided with backflush water outlet, backflush inlet and backflush water outlet between are provided with backflush water pipe, valve core is rotationally arranged in four-way valve, for water inlet one and direct current water outlet, filter water outlet or backflush inlet are communicated, by setting four-way valve and the valve core with specific flow channel structure and guide valve piece, flexible switching of filtering, straight-through and backflush cleaning function is realized, effectively improve the use convenience and maintenance efficiency of domestic filter.

Description

Technical Field

[0001] This utility model relates to filters, and more particularly to a household filter. Background Technology

[0002] Currently, Chinese patent CN218025529U discloses a household pre-filter that is easy to disassemble and clean. It includes an installation body with a water inlet at one end and a water outlet at the other. A water distributor is located in the middle of the installation body, with its lower end passing through the installation body and connected to a mesh frame. A filter membrane is fixedly connected to the outer periphery of the mesh frame. An annular locking position is formed in the middle of the lower end of the installation body, and a cover is located inside the annular locking position. A latch is fixedly connected to one side of the cover, and a ring buckle is rotatably connected to the annular locking position at the latch position. The cover is located outside the filter membrane. A through hole one is formed on the side of the cover opening near the water inlet of the installation body, and a second through hole is formed on the side of the water distributor near the water outlet.

[0003] The aforementioned patent still has shortcomings. After dirt accumulates, the filter element can only be cleaned by disassembly and cleaning, which is cumbersome and can easily damage the seals. After long-term use, there may be a risk of water leakage. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a household filter with a backwashing function.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a household filter, including a filter body, preferably, a four-way valve is connected to the side end of the filter body, the four-way valve includes a water inlet, a direct water outlet, a filter outlet and a backwash inlet, a valve core is provided in the middle of the four-way valve, the filter body includes a second water inlet and a second water outlet, a backwash outlet is also provided on the side end of the second water outlet, a backwash water pipe is provided between the backwash inlet and the backwash outlet, and the valve core is rotatably disposed in the four-way valve for connecting the first water inlet with the direct water outlet, the filter outlet or the backwash inlet.

[0006] Preferably, the valve core has a flow channel one and a flow channel two inside, the flow channel one and the flow channel two are connected and a one-way valve is provided. When the flow channel one is connected to the water inlet one and the backwash water inlet, the flow channel two is connected to the filter water outlet and the direct flow water outlet.

[0007] Preferably, a guide valve is also provided in the flow channel. When the inlet and the direct outlet are connected by a one-way valve, the guide valve is used to prevent water from entering the backwash inlet.

[0008] Preferably, the valve core includes a core body and a cover plate, the core body has a fixing hole, and the cover plate is fixed to the core body through the fixing hole.

[0009] Preferably, the filter body includes a mounting base, a filter cover, and a filter element. The filter element is fixed inside the mounting base, the filter cover is threadedly fixed to the mounting base, and a sealing ring is provided between the filter cover and the mounting base.

[0010] Preferably, the filter cover is further provided with a pressure indicating component, which is used to detect the liquid pressure inside the filter cover.

[0011] Preferably, the pressure indicating assembly includes a piston, an indicating post, a retaining ring, and a spring. The top of the filter cover has a sliding hole, the piston is slidably disposed in the sliding hole, the indicating post is disposed on the top of the piston, the retaining ring is fixed to the top of the sliding hole, the indicating post passes through the retaining ring and protrudes from the top of the filter cover, and the spring is disposed between the piston and the retaining ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting a four-way valve and a valve core with a specific flow channel structure and guide valve plate, the filtration, straight-through and backwash cleaning functions can be flexibly switched, which effectively improves the ease of use and maintenance efficiency of household filters; 2. The filter body adopts a separate design of mounting base, filter cover and filter element. Combined with threaded fit and sealing ring structure, it is convenient to replace and clean the filter element, and ensures the sealing during the filtration process to prevent liquid leakage. 3. The introduction of the pressure indicator component allows users to intuitively understand the internal liquid pressure of the filter and promptly judge the working status of the filter, providing a strong guarantee for the normal operation of the filter. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a cross-sectional schematic diagram of an embodiment; Figure 3 Partial cross-section of the embodiment Figure 1 ; Figure 4 This is a partial illustration of an embodiment. Figure 2 ; Figure 5 This is a partial illustration of an embodiment. Figure 3 ; Figure 6 This is a schematic diagram of the core structure; Figure 7 This is a schematic diagram of the pressure indicator component.

[0014] Reference numerals in the attached diagram: 1. Filter body; 2. Four-way valve; 3. Inlet 1; 4. Straight outlet; 5. Filter outlet; 6. Backwash inlet; 7. Valve core; 8. Inlet 2; 9. Outlet 2; 10. Backwash outlet; 11. Backwash pipe; 12. Flow channel 1; 13. Flow channel 2; 14. Check valve; 15. Guide valve plate; 16. Core; 17. Fixing hole; 18. Cover plate; 19. Mounting base; 20. Filter cover; 21. Filter element; 22. Sealing ring; 23. Pressure indicating assembly; 24. Piston; 25. Indicator column; 26. Fixing ring; 27. Spring. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0016] A type of household filter, such as Figures 1-7 As shown, the filter includes a filter body 1, and a four-way valve 2 is connected to the side of the filter body 1. The four-way valve 2 includes an inlet 3, a direct outlet 4, a filter outlet 5, and a backwash inlet 6. A valve core 7 is provided in the middle of the four-way valve 2. The filter body 1 includes an inlet 8 and an outlet 9. A backwash outlet 10 is also provided on the side of the outlet 9. A backwash pipe 11 is provided between the backwash inlet 6 and the backwash outlet 10. The valve core 7 is rotatably installed in the four-way valve 2 to connect the inlet 3 with the direct outlet 4, the filter outlet 5, or the backwash inlet 6.

[0017] The valve core 7 has a first flow channel 12 and a second flow channel 13 on its inner side. The first flow channel 12 and the second flow channel 13 are connected and a one-way valve 14 is provided. Under normal circumstances, such as Figure 4 As shown, one end of flow channel 13 is connected to inlet 3, and the other end is blocked. Water enters flow channel 12 from check valve 14 and flows from the outlet of flow channel 12 to direct outlet 4. When a filter is needed, the valve core 7 is rotated, as shown. Figure 5 As shown, flow channel 12 is connected to inlet 3 and filter outlet 5. The flow direction of check valve 14 is that flow channel 2 13 enters flow channel 12. Therefore, the liquid in flow channel 12 cannot enter flow channel 2 13 through check valve 14. When backflushing is required, such as... Figure 3 As shown, flow channel 12 connects inlet 3 and backwash inlet 6. Water enters outlet 9 of filter from backwash pipe 11 and flows back through filter body 1. At this time, flow channel 13 connects filter outlet 5 and direct outlet 4, and sewage flows out of direct outlet 4.

[0018] A guide valve plate 15 is also provided in the flow channel 12. When the inlet 3 and the direct outlet 4 are connected through the one-way valve 14, the guide valve plate 15 is used to prevent water from entering the backwash inlet 6.

[0019] The valve core 7 includes a core body 16 and a cover plate 18. The core body 16 has a fixing hole 17, and the cover plate 18 is fixed to the core body 16 through the fixing hole 17. The combination of the core body 16 and the cover plate 18 makes the processing of the valve core 7 more convenient. A sealing plate can be set between the cover plate 18 and the core body 16 to ensure sealing.

[0020] The filter body 1 includes a mounting base 19, a filter cover 20, and a filter element 21. The filter element 21 is fixed inside the mounting base 19, and the filter cover 20 is threadedly fixed to the mounting base 19. A sealing ring 22 is also provided between the filter cover 20 and the mounting base 19. The sealing ring 22 ensures the sealing of the connection and prevents leakage during use. The separate structure design of the mounting base 19 and the filter cover 20 facilitates the disassembly, cleaning, or replacement of the filter element 21, extending the service life of the equipment.

[0021] The filter cover 20 is also equipped with a pressure indicator component 23, which is used to detect the liquid pressure inside the filter cover 20. The pressure indicator component 23 includes a piston 24, an indicator post 25, a retaining ring 26, and a spring 27. A sliding hole is opened at the top of the filter cover 20. The piston 24 is slidably disposed in the sliding hole. The indicator post 25 is disposed on the top of the piston 24. The retaining ring 26 is fixed to the top of the sliding hole. The indicator post 25 passes through the retaining ring 26 and protrudes from the top of the filter cover 20. The spring 27 is disposed between the piston 24 and the retaining ring 26. When a lot of impurities accumulate on the outside of the filter element 21, causing the water flow resistance to increase, the pressure difference between the inside and outside of the filter element 21 increases, pushing the piston 24 to move upward against the elastic force of the spring 27, causing the indicator post 25 to extend longer. By setting a scale on the indicator post 25, the degree of clogging of the filter element 21 can be intuitively reflected, making it easy for users to grasp the usage status of the filter element 21 in a timely manner and perform reverse cleaning or replacement, thereby effectively maintaining the filtration efficiency and extending the life of the filter element 21.

[0022] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A household filter, comprising a filter body (1), characterized in that: The filter body (1) is connected to a four-way valve (2) on its side. The four-way valve (2) includes an inlet (3), a direct outlet (4), a filter outlet (5), and a backwash inlet (6). A valve core (7) is provided in the middle of the four-way valve (2). The filter body (1) includes an inlet (8) and an outlet (9). A backwash outlet (10) is also provided on the side of the outlet (9). A backwash pipe (11) is provided between the backwash inlet (6) and the backwash outlet (10). The valve core (7) is rotatably installed in the four-way valve (2) to connect the inlet (3) with the direct outlet (4), the filter outlet (5), or the backwash inlet (6).

2. A household filter according to claim 1, characterized in that: The valve core (7) has a flow channel one (12) and a flow channel two (13) on its inner side. The flow channel one (12) and the flow channel two (13) are connected and a one-way valve (14) is provided. When the flow channel one (12) is connected to the water inlet one (3) and the backwash water inlet (6), the flow channel two (13) is connected to the filter water outlet (5) and the direct flow water outlet (4).

3. A household filter according to claim 2, characterized in that: The flow channel (12) is also provided with a guide valve plate (15). When the inlet (3) and the direct outlet (4) are connected through a one-way valve (14), the guide valve plate (15) is used to prevent water from entering the backwash inlet (6).

4. A household filter according to claim 1, characterized in that: The valve core (7) includes a core body (16) and a cover plate (18). The core body (16) has a fixing hole (17), and the cover plate (18) is fixed to the core body (16) through the fixing hole (17).

5. A household filter according to claim 1, characterized in that: The filter body (1) includes a mounting base (19), a filter cover (20) and a filter element (21). The filter element (21) is fixed inside the mounting base (19). The filter cover (20) is threadedly fixed to the mounting base (19). A sealing ring (22) is also provided between the filter cover (20) and the mounting base (19).

6. A household filter according to claim 5, characterized in that: The filter cover (20) is also provided with a pressure indicator component (23), which is used to detect the liquid pressure inside the filter cover (20).

7. A household filter according to claim 6, characterized in that: The pressure indicating assembly (23) includes a piston (24), an indicating post (25), a retaining ring (26), and a spring (27). The filter cover (20) has a sliding hole at the top. The piston (24) is slidably disposed in the sliding hole. The indicating post (25) is disposed on the top of the piston (24). The retaining ring (26) is fixed to the top of the sliding hole. The indicating post (25) passes through the retaining ring (26) and protrudes from the top of the filter cover (20). The spring (27) is disposed between the piston (24) and the retaining ring (26).

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