Pre-filter and water system

Abstract

The utility model discloses a prefilter and water consuming system relates to prefilter technical field, wherein prefilter includes along the first direction distributed filter flask and valve head, filter flask has the water filtration cavity, the valve head has with the water inlet and water outlet that is communicated with the water filtration cavity, and the water outlet is communicated with the water filtration cavity. The filter bottle and the valve head are fixedly connected through a structure on the outer side, the filter bottle is provided with a first positioning structure, the valve head is provided with a second positioning structure, and the first positioning structure and the second positioning structure are in positioning fit in the first direction. According to the technical scheme, the assembling reliability of the valve head and the filter bottle can be improved.

Description

Technical Field

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

[0002] The existing pre-filter usually includes a valve head and a filter bottle that are separately arranged. During the production process of the pre-filter, the valve head and the filter bottle need to be reliably assembled to ensure the working performance of the pre-filter. Utility Model Content

[0003] The main purpose of the utility model is to provide a pre-filter and a water use system, aiming to improve the assembly reliability of a valve head and a filter bottle.

[0004] To achieve the above-mentioned purpose, the pre-filter proposed in the utility model includes a filter bottle and a valve head distributed along a first direction, the filter bottle has a water filter chamber, the valve head has a water inlet and a water outlet connected to the water filter chamber, the filter bottle and the valve head are fixedly connected by an external structure, the filter bottle is provided with a first positioning structure, and the valve head is provided with a second positioning structure, and the first positioning structure and the second positioning structure are positioned and matched in a direction intersecting with the first direction.

[0005] In one embodiment, a first flange is provided on the outer side of the opening of the water filter cavity, and a second flange is provided on the outer side of the valve head. The first flange and the second flange abut against each other along the first direction and are fixedly connected.

[0006] In one embodiment, the first flange ring is arranged around the cavity opening of the water filter cavity, and / or the second flange ring is arranged around the valve head.

[0007] In one embodiment, the first positioning structure includes a positioning protrusion protruding from the first flange, the positioning protrusion protruding toward the valve head, and the second positioning structure includes a positioning surface provided on the second flange, and the side surface of the positioning protrusion abuts against the positioning surface.

[0008] In one embodiment, the second positioning structure is configured as the outer edge of the second flange, the positioning surface is configured as the outer side surface of the second flange, and the positioning protrusion is located on the outer periphery of the second flange.

[0009] In one embodiment, a plurality of positioning protrusions are spaced apart along the circumferential direction of the filter bottle, an avoidance gap is formed between at least two adjacent positioning protrusions, and the butt joint between the first flange and the second flange is connected to the avoidance gap.

[0010] In one embodiment, the first flange ring is arranged around the cavity opening of the water filter cavity, and the second flange ring is arranged around the valve head. The outer peripheral contours of the first flange and the second flange are polygonal or quasi-polygonal, and the positioning protrusion is arranged corresponding to a corner of the first flange.

[0011] In one embodiment, the first flange is mounted to the second flange by fasteners.

[0012] In one embodiment, the first flange is provided with a first through hole, the second flange is provided with a second through hole, and the first through hole is connected to the second through hole by the fastener.

[0013] In one embodiment, the valve head includes a metal outer shell portion and a plastic lining portion connected to each other, the water inlet and the water outlet are formed on the plastic lining portion, and / or the second flange is provided on the metal outer shell portion.

[0014] The utility model also provides a water use system, comprising the aforementioned pre-filter.

[0015] The technical solution of the present utility model, through the mutual cooperation of the first positioning structure and the second positioning structure, can ensure that the filter bottle and the valve head are well aligned and connected to each other during assembly, and facilitates subsequent fastener connection or welding of the outer structures of the two. Secondly, through the positioning and cooperation of the first positioning structure and the second positioning structure in a direction intersecting with the first direction, the assembly reliability of the valve head and the filter bottle can be improved, and the problem of relative displacement of the valve head and the filter bottle along the direction intersecting with the first direction can be avoided, thereby better ensuring the working performance of the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic structural diagram of an embodiment of a pre-filter provided by the present utility model;

[0018] Figure 2 for Figure 1 a top view of the illustrated embodiment;

[0019] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0020] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the middle valve head;

[0022] Figure 6 for Figure 1 A structural schematic diagram of the middle filter bottle;

[0023] Figure 7 for Figure 1 Another structural diagram of the middle filter bottle.

[0024] Description of Figure Numbers:

[0025] 10. Filter bottle; 101. Water filter chamber; 102. First positioning structure; 103. Avoidance gap; 11. First flange; 111. First through hole; 12. Positioning protrusion;

[0026] 20. Valve head; 201. Water inlet; 202. Water outlet; 203. Second positioning structure; 21. Second flange; 211. Positioning surface; 212. Second through hole; 22. Metal outer shell; 23. Plastic lining;

[0027] 30. Fastener; 31. Bolt; 32. Nut.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to discharge the large particles that were previously intercepted, thereby increasing the service life of the pre-filter.

[0034] See also Figures 1 to 3 In one embodiment of the present invention, the pre-filter includes a filter bottle 10 and a valve head 20 connected to the filter bottle 10, the filter bottle 10 has a water filter chamber 101, the valve head 20 has a water inlet 201 and a water outlet 202 connected to the water filter chamber 101, the water inlet 201 is connected to the water supply end, and the water outlet 202 is connected to the water use end.

[0035] It should be noted that the water supply end can be a tap, a water tower or well water, and the water use end can be a faucet, a shower or a drinking water outlet. This application does not make specific restrictions on this.

[0036] Furthermore, the pre-filter also includes a filtration structure 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, the filtration structure removes large particles as it flows through the water filter chamber 101. The filtered water then flows out of the pre-filter through the water outlet 202 and toward the water consumption end. This process achieves a coarse filtration of the raw water.

[0037] On the one hand, the valve head 20 of existing pre-filters is typically made of copper alloy. Based on this, the valve head 20 and the filter bottle 10 are primarily connected by threads. For example, the valve head 20 is provided with a protruding externally threaded tube, and the mouth of the filter bottle 10 is provided with corresponding internal threads for the externally threaded tube to be threaded. This connection method requires the use of specific fixtures for production and requires checking whether the valve head 20 and the filter bottle 10 are screwed into place. It also has strict control requirements on the rotational torque. This makes this connection method more complex to manufacture, and the protruding externally threaded tube on the valve head 20 leads to higher material costs.

[0038] Therefore, in order to solve the above-mentioned problem, in the embodiment of the present invention, the filter bottle 10 and the valve head 20 are optionally fixedly connected by an external structure. It should be noted that the filter bottle 10 and the valve head 20 are fixedly connected by an external structure, which means that the filter bottle 10 and the valve head 20 are not installed by the insertion of a partial structure. It can be understood that the existing filter bottle 10 and the valve head 20 are connected by threads. For example, the valve head 20 is provided with an external threaded tube, and the inner side of the bottle mouth of the filter bottle 10 is provided with an internal thread for the external threaded tube to be screwed. The external threaded tube is then rotated and extended into the bottle mouth of the filter bottle. In other words, the installation is achieved by the insertion of a partial structure, that is, the installation is achieved by inserting the external threaded tube into the filter bottle.

[0039] In this way, the outer structures of the filter bottle 10 and the valve head 20 are used for installation instead of the threaded connection method, which can not only reduce the production difficulty of the pre-filter, but also reduce the inspection requirements of its assembly results and reduce the material cost of the valve head 20.

[0040] On the other hand, during the production of the pre-filter, the valve head and filter bottle need to be reliably assembled to ensure the working performance of the pre-filter. Figures 4 to 7 Furthermore, the filter bottle 10 and the valve head 20 are distributed along a first direction, the filter bottle 10 is provided with a first positioning structure 102, and the valve head 20 is provided with a second positioning structure 203. The first positioning structure 102 and the second positioning structure 203 are positioned and matched in a direction intersecting with the first direction.

[0041] In this way, the mutual cooperation between the first positioning structure 102 and the second positioning structure 203 ensures that the filter bottle 10 and the valve head 20 are properly aligned and connected during assembly, and facilitates subsequent fastener connection or welding of the outer structures of the two. Furthermore, the positioning and cooperation between the first positioning structure 102 and the second positioning structure 203 in a direction intersecting the first direction can improve the assembly reliability of the valve head 20 and the filter bottle 10, avoid relative displacement between the valve head 20 and the filter bottle 10 in a direction intersecting the first direction, and better ensure the performance of the pre-filter. Of course, in other embodiments, the first positioning structure 102 and the second positioning structure 203 may not be provided.

[0042] See also Figures 4 to 6 Furthermore, a first flange 11 is provided on the outer side of the opening of the water filter chamber 101, and a second flange 21 is provided on the outer side of the valve head 20. The first flange 11 and the second flange 21 abut against each other and are fixedly connected along a first direction. That is, in this embodiment, the first flange 11 is the outer structure of the filter bottle 10, and the second flange 21 is the outer structure of the valve head 20. Therefore, the aforementioned fixed connection between the filter bottle 10 and the valve head 20 via the outer structure refers to the fixed connection between the first flange 11 and the second flange 21 in this embodiment. In this way, the first flange 11 and the second flange 21 can increase the contact area between the filter bottle 10 and the valve head 20, thereby improving the structural stability and airtightness of the pre-filter. Of course, in other embodiments, other positions may also abut against each other to achieve a fixed connection between the filter bottle 10 and the valve head 20 through the outer structure. For example, in an embodiment where the first flange 11 and the second flange 21 are not provided, the connecting pipe mouth of the valve head 20 and the bottle mouth edge of the filter bottle 10 abut against each other, or are buckled with each other through a snap-fit ​​structure.

[0043] See also Figure 5 and Figure 6 To further enhance the structural stability and airtightness of the pre-filter, the first flange 11 is optionally disposed around the opening of the water filter chamber 101, while the second flange 21 is disposed around the valve head 20. In this manner, the annular first flange 11 and second flange 21 cooperate to increase the contact area between the valve head 20 and the filter bottle 10, thereby enhancing the structural stability and airtightness of the pre-filter. Of course, in other embodiments, only the first flange 11 may be disposed around the opening of the water filter chamber 101, or only the second flange 21 may be disposed around the valve head 20.

[0044] Optionally, the first positioning structure 102 includes a positioning protrusion 12 provided on the first flange 11, the positioning protrusion 12 protruding toward the valve head 20, and the second positioning structure 203 includes a positioning surface 211 provided on the second flange 21, with the side surface of the positioning protrusion 12 abutting against the positioning surface 211. In this manner, providing the positioning protrusion 12 on the filter bottle 10 helps reduce the material cost of the valve head 20 and facilitates the manufacture of the valve head 20. Of course, in other embodiments, the positioning protrusion 12 may be provided on the valve head 20, or both the valve head 20 and the filter bottle 10 may be provided with the positioning protrusion 12.

[0045] Optionally, the second positioning structure 203 is configured as the outer edge of the second flange 21, the positioning surface 211 is configured as the outer side surface of the second flange 21, and the positioning protrusion 12 is located on the outer periphery of the second flange 21. This structure is simple and facilitates the manufacture of the valve head 20, while effectively positioning the outer side surface of the second flange 21 via the positioning protrusion 12. Of course, in other embodiments, the second positioning structure 203 can also be configured as a positioning hole provided in the second flange 21, the positioning surface 211 is configured as the wall surface of the positioning hole, and the positioning protrusion 12 can be adapted to be inserted into the positioning hole.

[0046] See also Figure 1 and Figure 6 Optionally, a plurality of positioning protrusions 12 are provided at intervals along the circumferential direction of the filter bottle 10, and an avoidance notch 103 is formed between at least two adjacent positioning protrusions 12, and the butt joint between the first flange 11 and the second flange 21 is connected to the avoidance notch 103. In this way, by providing the avoidance notch 103 connected to the butt joint, it is convenient to disassemble the valve head 20 during later maintenance. For example, a crowbar or a flat-blade screwdriver can be passed through the avoidance notch 103 and inserted into the butt joint, and then a lever force can be applied to pry and disassemble the valve head 20. Optionally, the bottom surface of the avoidance notch 103 is flush with the end surface of the first flange 11 facing the second flange 21, which is more conducive to the insertion of tools (such as a crowbar). Of course, in other embodiments, the avoidance notch 103 may not be provided.

[0047] It should be noted that the butt joint does not specifically refer to a gap with a non-zero gap value reserved in the design stage, but may include a gap designed to be zero gap. In the embodiment of the present utility model, a plurality refers to a number greater than or equal to 2.

[0048] The first flange 11 is arranged around the circumference of the opening of the water filter chamber 101, and the second flange 21 is arranged around the circumference of the valve head 20. The outer contours of the first flange 11 and the second flange 21 are polygonal or quasi-polygonal. A positioning protrusion 12 is arranged corresponding to a corner of the first flange 11. For example, Figure 2As shown in the figure, the outer contours of the first flange 11 and the second flange 21 are both roughly square in shape, so they have four corresponding corners. Four positioning protrusions 12 are provided corresponding to these four corners, and they correspond one to one with the four corners. In this way, the multiple corners of the second flange 21 are all positioned with the corresponding positioning protrusions 12 for positioning, which can not only improve the positioning reliability of the valve head 20 and the filter bottle 10, but also form multiple avoidance gaps 103 for selection, thereby facilitating the operation of prying the valve head 20. Of course, in other embodiments, the positioning protrusions 12 can also extend along the outer contour of the first flange 11 and be connected end to end.

[0049] Optionally, the cross-sectional height of the positioning protrusion 12 ranges from 1 mm to 2 mm, for example, 1.5 mm or 1.8 mm; the cross-sectional width of the positioning protrusion 12 ranges from 1 mm to 2 mm, for example, 1.5 mm or 1.8 mm. That is, the cross-sectional height of the positioning protrusion 12 ranges from 1 mm to 2 mm, for example, 1.5 mm or 1.8 mm. In other words, the cross-sectional height of the positioning protrusion 12 ranges from 1 mm to 2 mm, and the cross-sectional width of the positioning protrusion 12 ranges from 1 mm to 2 mm.

[0050] To further facilitate the production of prefilters, see Figure 1 Optionally, the filter bottle 10 and the valve head 20 are mounted and fixed using fasteners 30. In this way, after the filter bottle 10 and the valve head 20 are docked, they are relatively fixed via fasteners 30, which not only facilitates the production and assembly of the pre-filter, but also facilitates the subsequent disassembly and maintenance of the product. Of course, in other embodiments, the filter bottle 10 and the valve head 20 can also be fixed by welding or bonding.

[0051] Optionally, the first flange 11 is mounted on the second flange 21 via a fastener 30. This provides a simple structure and facilitates assembly and fixation of the fastener 30. Of course, in other embodiments, the fastener 30 may be located at other locations on the filter bottle 10 and the valve head 20.

[0052] See also Figure 5 and Figure 6 Optionally, the first flange 11 is provided with a first through hole 111, the second flange 21 is provided with a second through hole 212, and the first through hole 111 is connected to the second through hole 212 by a fastener 30. In this way, the structure is simple and the production of the valve head 20 and the filter bottle 10 is convenient.

[0053] See also Figure 1 Optionally, the fastener 30 includes a bolt 31 and a nut 32. The nut 32 is mounted on the filter bottle 10. The bolt 31 passes through the second through-hole 212 and the first through-hole 111 and is then connected to the nut 32. This facilitates installation and removal of the pre-filter. Of course, in other embodiments, the fastener 30 may also be a rivet or snap fastener.

[0054] See also Figure 3 and Figure 4 The valve head 20 includes a metal outer shell 22 and a plastic lining 23 connected to each other, and the water inlet 201 and the water outlet 202 are formed on the plastic lining 23. That is, the valve head 20 includes an outer metal outer shell 22 and an inner plastic lining 23. Tap water first enters the plastic lining 23 from the water inlet 201, then enters the filter bottle 10 for filtration, and then flows out from the water outlet 202. In this way, the water flowing through the pre-filter directly contacts the plastic lining 23 rather than the metal outer shell 22, which can avoid the problem of water being contaminated by metal elements precipitated from the metal outer shell 22, and can also make the pre-filter have good aesthetics and shell strength. Of course, in other embodiments, the valve head 20 can also be made only of metal or plastic material.

[0055] Optionally, the second flange 21 is provided on the metal shell portion 22. In this way, the second flange 21 can be ensured to have good structural strength and rigidity, thereby ensuring that the second flange 21 can stably abut against the first flange 11 and ensuring that the pre-filter has good airtightness.

[0056] Specifically, the metal shell 22 is sleeved within the plastic liner 23 and is used to connect to the filter bottle 10 of the prefilter. The second through-hole 212 is provided in the metal shell 22 and connected to the filter bottle 10 via fasteners, thereby enhancing the reliability of the connection between the valve head 20 and the filter bottle 10. The metal shell 22 does not require post-processing to form internal or external threads; it can be stably connected via fasteners after the valve head 20 is formed. Furthermore, alignment requirements between the metal shell 22 and the filter bottle 10 are relatively low, and precise torque control is not required during the connection process. The metal shell 22 and the filter bottle 10 can simply be connected via fasteners, thereby simplifying the production and assembly of the prefilter.

[0057] Specifically, the material of the metal shell part 22 and the plastic lining part 23 is not specifically limited in this application. For example, the material of the metal shell part 22 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 present invention also proposes a water use system, which includes the aforementioned pre-filter. The specific structure of the pre-filter refers to the above-mentioned embodiment. Since the present water use system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0059] Among them, the water use system at least includes relevant components from the pre-filter to the water use end. For example, the water use system may include household appliances such as water heaters, dishwashers, and water dispensers, and may also include accessories such as water pipes for domestic water use throughout the house.

[0060] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: The filter bottle and the valve head are distributed along a first direction, the filter bottle has a water filter cavity, the valve head has a water inlet and a water outlet connected to the water filter cavity, the filter bottle and the valve head are fixedly connected by an external structure, the filter bottle is provided with a first positioning structure, and the valve head is provided with a second positioning structure, and the first positioning structure and the second positioning structure are positioned and matched in a direction intersecting with the first direction.

2. The prefilter according to claim 1, wherein A first flange is provided on the outer side of the cavity opening of the water filter cavity, and a second flange is provided on the outer side of the valve head. The first flange and the second flange are abutted and fixedly connected along the first direction.

3. The prefilter according to claim 2, wherein: The first flange ring is arranged on the circumference of the cavity opening of the water filter cavity, and / or the second flange ring is arranged on the circumference of the valve head.

4. The prefilter according to claim 2, wherein: The first positioning structure includes a positioning protrusion protruding from the first flange, the positioning protrusion protruding toward the valve head, and the second positioning structure includes a positioning surface provided on the second flange, the side surface of the positioning protrusion abutting against the positioning surface.

5. The pre-filter according to claim 4, characterized in that The second positioning structure is configured as the outer edge of the second flange, the positioning surface is configured as the outer side surface of the second flange, and the positioning protrusion is located on the outer periphery of the second flange.

6. The prefilter according to claim 5, characterized in that A plurality of positioning protrusions are spaced apart along the circumferential direction of the filter bottle, an avoidance gap is formed between at least two adjacent positioning protrusions, and the butt joint between the first flange and the second flange is connected to the avoidance gap.

7. The prefilter according to claim 5 or 6, characterized in that: The first flange ring is arranged around the cavity opening of the water filter cavity, and the second flange ring is arranged around the valve head. The outer contours of the first flange and the second flange are polygonal or quasi-polygonal, and the positioning protrusion is arranged corresponding to a corner of the first flange.

8. The prefilter according to claim 2, wherein: The first flange is mounted on the second flange by fasteners.

9. The prefilter according to claim 8, characterized in that The first flange is provided with a first through hole, the second flange is provided with a second through hole, and the first through hole is connected to the second through hole by the fastener.

10. The prefilter according to claim 2, wherein: The valve head includes a metal outer shell and a plastic lining portion that are connected to each other, the water inlet and the water outlet are formed on the plastic lining portion, and / or the second flange is provided on the metal outer shell.

11. A water system, characterized in that: The method comprises the pre-filter according to any one of claims 1 to 10.

Images