Filter element structure for water purifier and water purifier

Abstract

The utility model relates to a filter element structure for a water purifier and the water purifier. The filter element structure comprises a filter bottle, one end of the filter membrane faces the bottle cap; the fixed pipe is inserted in the center of the filter membrane, a first through hole is formed in the peripheral wall of the fixed pipe, and the first end of the fixed pipe is open and faces the pure water outlet; the movable pipe can be axially and movably inserted into the fixed pipe, a second through hole is formed in the peripheral wall of the movable pipe, and the movable pipe can move to a first position where the second through hole and the first through hole are correspondingly communicated or a second position where the second through hole and the first through hole are staggered; a third through hole for water to enter is formed in the fixed pipe, the movable pipe can move to the first position under the action of the pressure of water flow entering from the third through hole, and the elastic piece enables the movable pipe to always keep the trend of moving to the second position. The spring is controlled to be compressed through tap water, the movable pipe moves to the first position, the tap water pressure is large, working reliability is high, and when water is not produced, the elastic piece does not need to be compressed.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, and in particular to a filter element structure used for a water purifier and a water purifier. Background Art

[0002] Existing water purification equipment mainly relies on membrane filter elements to filter raw water. When the water purification equipment is in standby mode, raw water, wastewater and pure water will coexist in the membrane filter element. The TDS concentration of raw water and wastewater is much higher than that of pure water. If the water purification equipment is in standby mode for a long time, this will cause the ions in the raw water and wastewater to diffuse into the pure water, which will cause the TDS concentration of the first cup of pure water to be relatively high when the water purification equipment is turned on to take pure water next time, affecting the water quality. At the same time, due to the pressure relief on the wastewater side of the filtration unit, the first cup of water comes out slowly.

[0003] In response to the above problems, the Chinese utility model patent with patent number CN202022705033.X (publication number CN214087841U) discloses "an RO filter element and water purifier to prevent the TDS value of the first cup of water from being too high", which includes a filter bottle, a filter bottle cover and an RO membrane, and the RO membrane is placed in the filter bottle; a first central tube is provided inside the RO membrane, a plurality of first through holes are provided on the first central tube, a second central tube is provided in the first central tube, the upper ends of the first central tube and the second central tube are closed ends, and a spring is provided between the two; a plurality of second through holes are provided on the second central tube, and there are two states of connection and mutual displacement between the first through holes and the second through holes. The utility model sets a coaxial second central tube in the first central tube, and the two can move relative to each other, and the through holes on them can be connected or dislocated from each other. When connected, water can be produced normally, and when dislocated from each other, water with a high TDS value on one side of the RO membrane raw water can be prevented from penetrating into the pure water inside the second central tube when standing, which plays a role in preventing the TDS value of pure water from increasing and ensuring the normal water quality of the first cup of water.

[0004] Although this patent can solve the problem of high TDS concentration in the first cup of water, its working process is: when the faucet is closed, water is continued to be produced for several seconds, the pressure in the second central tube increases, and the second central tube moves toward the spring side under the action of water pressure. The first through hole on the first central tube and the second through hole on the second central tube are staggered with each other. After the water path between the pure water in the second central tube and the RO membrane is cut off, water production is stopped.

[0005] That is, when the water outlet faucet is closed, water needs to continue to be produced and the pressure needs to be maintained. In addition, the water pressure of the water production is low, and the spring must be kept in a compressed state when not working, so the reliability is relatively poor. Utility Model Content

[0006] The first technical problem to be solved by the utility model is to provide a filter element structure for a water purifier which can reliably prevent ions in raw water and waste water from diffusing into pure water in a standby state in view of the current status of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide a water purifier using the above filter element structure in view of the current status of the prior art.

[0008] The utility model solves the above-mentioned first technical problem by adopting the following technical solution: a filter element structure for a water purifier, comprising:

[0009] The filter bottle comprises a bottle body with an open end and a bottle cap arranged on the open end of the bottle body, wherein the bottle cap is provided with a raw water inlet, a waste water outlet and a pure water outlet;

[0010] A filter membrane is arranged in the bottle body, with one end of the filter membrane facing the bottle cap;

[0011] A fixed tube is inserted in the central part of the filter membrane, a first through hole is provided on the peripheral wall of the fixed tube, and a first end of the fixed tube is open and faces the pure water outlet;

[0012] A movable tube is inserted into the fixed tube so as to be axially movable, a second through hole is provided on the peripheral wall of the movable tube, and the movable tube can be moved to a first position where the second through hole is correspondingly connected to the first through hole or to a second position where the second through hole is staggered from the first through hole;

[0013] It is characterized in that the fixed tube is provided with a third through hole for water to enter, and the movable tube can move to the first position under the action of the water flow pressure entering from the third through hole, and the filter element structure also includes an elastic member acting on the movable tube, and the elastic member enables the movable tube to always maintain the tendency to move to the second position.

[0014] In order to enable the moving tube to move under the action of the inlet water pressure, the second end of the moving tube is located downstream of the third through hole along the flow direction of water after entering the third through hole, so that the water flow will impact the moving tube and drive the moving tube to move.

[0015] In the above solution, the second end of the fixing tube abuts against the end wall of the bottle body, and the third through hole is provided on the side wall of the fixing tube adjacent to the second end.

[0016] In order to limit the moving stroke of the movable tube, a baffle is provided on the inner side wall of the fixed tube adjacent to the first end, and a water outlet is provided on the baffle. When the first end of the movable tube abuts against the baffle, the movable tube is in the first position.

[0017] In order to facilitate the arrangement of the elastic member, a step surface is provided on the outer wall surface of the moving tube adjacent to the first end. The elastic member is a spring, one end of which abuts against the step surface and the other end abuts against the baffle.

[0018] In order to prevent the raw water and the pure water from mixing, a sealing ring is provided between a position adjacent to the second end of the movable tube and a position adjacent to the second end of the fixed tube to prevent water leakage between the movable tube and the fixed tube.

[0019] In order to improve the water production efficiency, there are a plurality of first through holes which are spaced apart along the axial direction of the fixed pipe, and there are a plurality of second through holes which are spaced apart along the circumferential direction of the movable pipe.

[0020] In order to facilitate the connection or blocking of the first through hole and the second through hole, the distance between two adjacent first through holes is the same as the distance between two adjacent second through holes, and the diameter of the second through hole is larger than that of the first through hole.

[0021] In order to position the filter membrane, a positioning seat is provided on the bottle cap, the end of the filter membrane is inserted into the positioning seat, and the first end of the fixing tube passes through the positioning seat.

[0022] The technical solution adopted by the utility model to solve the above second technical problem is: a water purifier, characterized in that it includes the above filter element structure.

[0023] Compared with the prior art, the utility model has the following advantages: the movable tube of the utility model can be moved to the first position under the action of the water flow pressure entering from the third through hole, and the movable tube can always maintain the trend of moving to the second position under the action of the elastic member, that is, the utility model controls the compression of the spring through tap water, so that the movable tube moves to the first position, the tap water pressure is high, the working reliability is high, and when water is not produced, the elastic member does not need to be compressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the filter element according to an embodiment of the utility model;

[0025] Figure 2 for Figure 1 (the moving tube is in a first position);

[0026] Figure 3 for Figure 1 Schematic diagram of the structure of the mobile tube in FIG.

[0027] Figure 4 for Figure 1 A schematic diagram of the structure of the fixed pipe in FIG.

[0028] Figure 5 for Figure 1 (the moving tube is in the second position). DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 5 As shown, the filter element structure of this preferred embodiment is used in a water purifier, and the filter element structure includes a filter bottle 5, a filter membrane 1, a fixed tube 2, a movable tube 3 and an elastic member 4.

[0031] The filter bottle 5 comprises a bottle body 51 with an open end and a bottle cap 52 covering the open end of the bottle body 51. The open end of the bottle body 51 is provided with a plug post 511, and the bottle cap 52 is provided with a slot 521 in which the plug post 511 can be inserted. The bottle cap 52 is provided with a raw water inlet 53, a waste water outlet 54 and a pure water outlet 55. The filter membrane 1 is arranged in the bottle body 51, and one end of the filter membrane 1 faces the bottle cap 52. The bottle cap 52 is provided with a positioning seat 56 for positioning the filter membrane 1, and the end of the filter membrane 1 is inserted in the positioning seat 56, and the first end of the fixing tube 2 passes through the positioning seat 56.

[0032] These are existing technologies and will not be described in detail here.

[0033] The fixed tube 2 is inserted in the central part of the filter membrane 1 . A first through hole 21 is provided on the peripheral wall of the fixed tube 2 . The first end of the fixed tube 2 is open and faces the pure water outlet 55 .

[0034] The movable tube 3 can be axially movably inserted into the fixed tube 2. A second through hole 31 is provided on the peripheral wall of the movable tube 3. The movable tube 3 can move to a first position where the second through hole 31 is correspondingly connected to the first through hole 21 or a second position where the second through hole 31 is staggered from the first through hole 21.

[0035] The fixed pipe 2 is provided with a third through hole 22 for water to enter. Along the flow direction of water after entering the third through hole 22, the second end of the movable pipe 3 is located downstream of the third through hole 22. In this way, the water flow will impact the movable pipe 3, driving the movable pipe 3 to move, so that the movable pipe 3 can move to the first position under the action of the water flow pressure entering from the third through hole 22. Figure 2 shown.

[0036] In this embodiment, the second end of the fixing tube 2 abuts against the end wall of the bottle body 51 , and the third through hole 22 is provided on the side wall of the fixing tube 2 adjacent to the second end.

[0037] A baffle 23 is provided on the inner wall of the fixed tube 2 adjacent to the first end, and a water outlet 24 is provided on the baffle 23. When the first end of the movable tube 3 is in contact with the baffle 23, the movable tube 3 is in the first position, the elastic member 4 is in a compressed state, and the baffle 23 limits the moving stroke of the movable tube 3.

[0038] The elastic member 4 acts on the moving tube 3, and the elastic member 4 makes the moving tube 3 always keep the tendency to move to the second position. In the state of no water production, no water flow acts on the moving tube 3, and the moving tube 3 is in the second position under the action of the elastic member 4. Figure 5 shown.

[0039] A step surface 32 is provided on the outer wall surface of the moving tube 3 adjacent to the first end. The elastic member 4 is a spring, one end of which abuts against the step surface 32 and the other end of which abuts against the baffle 23 .

[0040] A sealing ring 33 is provided between a position adjacent to the second end of the movable pipe 3 and a position adjacent to the second end of the fixed pipe 2 to prevent water leakage between the movable pipe 3 and the fixed pipe 2, thereby preventing the raw water and the pure water from mixing.

[0041] In this embodiment, there are a plurality of first through holes 21 and they are spaced apart along the axial direction of the fixed tube 2, and there are a plurality of second through holes 31 and they are spaced apart along the circumferential direction of the movable tube 3. In order to facilitate the connection or blocking between the first through holes 21 and the second through holes 31, the spacing between two adjacent first through holes 21 is the same as the spacing between two adjacent second through holes 31, and the diameter of the second through holes 31 is slightly larger than the diameter of the first through holes 21.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0043] The "fluid communication" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A filter element structure for a water purifier, comprising: The filter bottle (5) comprises a bottle body (51) with an open end and a bottle cap (52) arranged on the open end of the bottle body (51), wherein the bottle cap (52) is provided with a raw water inlet (53), a waste water outlet (54) and a pure water outlet (55); A filter membrane (1) is disposed in the bottle body (51), with one end of the filter membrane (1) facing the bottle cap (52); A fixed tube (2) is inserted into the central part of the filter membrane (1), a first through hole (21) is provided on the peripheral wall of the fixed tube (2), and a first end of the fixed tube (2) is open and faces the pure water outlet (55); A movable tube (3) is inserted into the fixed tube (2) in an axially movable manner, a second through hole (31) is provided on the peripheral wall of the movable tube (3), and the movable tube (3) can be moved to a first position where the second through hole (31) is correspondingly connected to the first through hole (21) or a second position where the second through hole (31) is staggered from the first through hole (21); It is characterized in that The fixed pipe (2) is provided with a third through hole (22) for water to enter, and the movable pipe (3) can be moved to the first position under the action of the water flow pressure entering from the third through hole (22), and the filter element structure also includes an elastic member (4) acting on the movable pipe (3), and the elastic member (4) enables the movable pipe (3) to always maintain the tendency to move to the second position.

2. The filter element structure according to claim 1, Features: Along the flow direction of water after entering the third through hole (22), the second end of the moving pipe (3) is located downstream of the third through hole (22).

3. The filter element structure according to claim 2, Features: The second end of the fixing tube (2) abuts against the end wall of the bottle body (51), and the third through hole (22) is provided on the side wall of the fixing tube (2) adjacent to the second end.

4. The filter element structure according to claim 1, Features: A baffle (23) is provided on the inner side wall of the fixed tube (2) adjacent to the first end, and a water outlet (24) is provided on the baffle (23). When the first end of the movable tube (3) abuts against the baffle (23), the movable tube (3) is in a first position.

5. The filter element structure according to claim 4, Features: A step surface (32) is provided on the outer wall surface of the moving tube (3) adjacent to the first end; the elastic member (4) is a spring, one end of which abuts against the step surface (32) and the other end of which abuts against the baffle (23).

6. The filter element structure according to any one of claims 1 to 5, Features: A sealing ring (33) is provided between a position adjacent to the second end of the movable tube (3) and a position adjacent to the second end of the fixed tube (2).

7. The filter element structure according to any one of claims 1 to 5, Features: There are a plurality of first through holes (21) which are arranged at intervals along the axial direction of the fixed tube (2), and there are a plurality of second through holes (31) which are arranged at intervals along the circumferential direction of the movable tube (3).

8. The filter element structure according to claim 7, Features: The spacing between two adjacent first through holes (21) is the same as the spacing between two adjacent second through holes (31), and the diameter of the second through holes (31) is larger than the diameter of the first through holes (21).

9. The filter element structure according to any one of claims 1 to 5, Features: The bottle cap (52) is provided with a positioning seat (56), the end of the filter membrane (1) is inserted into the positioning seat (56), and the first end of the fixing tube (2) passes through the positioning seat (56).

10. A water purifier, It is characterized in that The invention comprises the filter element structure as described in any one of claims 1 to 9.

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