A prefilter stack and prefilter

Abstract

The utility model discloses a kind of prefilter laminations and prefilter, prefilter laminations include several filter sheets, filter sheet all includes filter sheet body and first filter layer, filter sheet body is annular structure, filter sheet body includes first filter side, first filter side is located in filter sheet body in the side on its axial direction, all filter sheets are sequentially stacked in the axial direction of filter sheet body;First filter layer is annular convex structure projecting from the surface of first filter side, first filter layer includes the first inner side surface towards filter sheet body axis, the first outer side surface away from filter sheet body axis and is in wave shape structure, and the first water channel of several firsts extending from first outer side surface to first inner side surface, first convex strip projecting from the surface of first filter side is formed between adjacent first water channel, first water channel is used for liquid flow circulation;By increasing the contact area of first outer side surface and raw water, the flow of filter per unit time is improved, and user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to a pre-filter stack and a pre-filter. Background Technology

[0002] The city's water supply pipelines are old and long. Rust, silt and other impurities in the pipelines can cause water-using equipment to malfunction. Therefore, it is necessary to install filtration devices on the water-using equipment.

[0003] A pre-filter is the first coarse filtration device for the whole house's water supply. It can filter out sediment, rust, and large particles from tap water. It prevents the large amount of sediment and impurities generated in urban and residential water supply networks from causing harm to the human body, and also plays a positive pre-protective role in concealed pipes, faucets, plumbing, water heaters, boilers, central air conditioning, washing machines, dishwashers, coffee machines, and other water appliances (water purifiers, reverse osmosis systems, water softeners).

[0004] The limited space inside the filter bottle of the existing pre-filter restricts the number of discs that can be arranged, which limits the flow rate of the filter per unit time. This limitation becomes even more pronounced as the requirements for the filtration accuracy of discs continue to increase.

[0005] Therefore, how to improve the above-mentioned drawbacks, increase the flow rate of the filter per unit time, and enhance the user experience is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a pre-filter stack and a pre-filter that can increase the filtration area, thereby increasing the flow rate of the filter per unit time and improving the user experience.

[0007] To achieve the above objectives, this utility model provides a pre-filter stack, comprising a plurality of filter plates, each filter plate comprising:

[0008] The filter body has a ring structure and includes a first filtration side located on one side of the filter body along its own axial direction. All filter sheets are stacked sequentially along the axial direction of the filter body.

[0009] The first filter layer is an annular protrusion structure protruding from the first filter side surface. The first filter layer includes a first inner side facing the axis of the filter body, a first outer side facing away from the axis of the filter body and having a wavy structure, and a plurality of first water passage grooves extending from the first outer side to the first inner side. A first ridge protruding from the first filter side surface is formed between adjacent first water passage grooves. The first water passage grooves are used to allow liquid to flow between the first outer side and the first inner side.

[0010] In one possible implementation, the filter body further includes a second filter side parallel to and opposite to the first filter side. The filter also includes a second filter layer, which is an annular protrusion structure protruding from the surface of the second filter side. The second filter layer includes a second inner side facing the axis of the filter body, a second outer side facing away from the axis of the filter body and having a wavy structure, and a plurality of second water passage grooves extending from the second outer side to the second inner side. A second ridge protruding from the surface of the second filter side is formed between adjacent second water passage grooves. The second water passage grooves are used to allow liquid to flow between the second outer side and the second inner side.

[0011] In one possible implementation, the width of the first water passage gradually decreases along its own extending direction; and / or,

[0012] The width of the second water passage gradually decreases along its extension direction.

[0013] In one possible implementation, the first inner surface has a wavy structure; and / or,

[0014] The second inner surface has a wavy structure.

[0015] In one possible implementation, the first protrusion includes a first fixed end facing the axis of the filter body and a second fixed end facing away from the axis of the filter body, and the extension direction of the first protrusion is deflected by a first angle relative to the radial direction of the first fixed end.

[0016] The second protrusion includes a third fixed end facing the axis of the filter body and a fourth fixed end facing away from the axis of the filter body. The extension direction of the second protrusion is deflected by a second angle relative to the radial direction of the third fixed end.

[0017] In one possible implementation, the first and second convex strips in the same filter sheet deflect in opposite directions.

[0018] In one possible implementation, both the first angle and the second angle are 40°-70°.

[0019] In one possible implementation, a filtration structure comprising a first filtration layer and a second filtration layer is formed between adjacent filter bodies, wherein the first and second water passages in the filtration structure are interleaved and connected to form a honeycomb filtration channel.

[0020] A pre-filter comprising a pre-filter stack as described in any of the above.

[0021] Compared to the aforementioned background technology, the pre-filter stack provided by this utility model includes a plurality of filter plates, each filter plate including a filter plate body and a first filter layer. The filter plate body has an annular structure and includes a first filter side located on one side of the filter plate body along its own axial direction. All filter plates are stacked sequentially along the axial direction of the filter plate body. The first filter layer is an annular protrusion structure protruding from the surface of the first filter side. The first filter layer includes a first inner side facing the axis of the filter plate body, a first outer side facing away from the axis of the filter plate body and having a wavy structure, and a plurality of first water passage grooves extending from the first outer side to the first inner side. A first ridge protruding from the surface of the first filter side is formed between adjacent first water passage grooves. The first water passage grooves are used to allow liquid to flow between the first outer side and the first inner side.

[0022] Specifically, the filter body has a ring-shaped structure. The first filter layer is located on the first filter side of the filter body, on its own axial side. By opening a first water passage groove between the first inner side facing the axis of the filter body and the first outer side facing away from the axis of the filter body in the first filter layer, the raw water located on the outer periphery of the first filter layer can enter the inner periphery of the first filter layer after being filtered by the first filter layer. The first outer side of the first filter layer has a wavy structure. Compared with the circular structure of the first outer side in the prior art, it can increase the contact area between the first outer side and the raw water without changing the filtration accuracy. This increases the contact area between the end of the first water passage groove on the first outer side and the raw water, thereby increasing the filtration area and improving the flow rate of the filter per unit time, thus enhancing the user experience. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the pre-filter stack provided in an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3 This is a schematic diagram of the structure of the first filter layer provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the filter sheet provided in an embodiment of the present utility model;

[0028] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the honeycomb filter channel provided in an embodiment of the present invention.

[0030] in:

[0031] 110-Filter body, 111-First filter side, 120-First filter layer, 123-First water passage groove, 124-First protrusion, 125-First fixed end, 126-Second fixed end. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0035] The purpose of this invention is to provide a pre-filter stack and a pre-filter that can increase the filtration area, thereby increasing the flow rate of the filter per unit time and improving the user experience.

[0036] Please see Figure 1 , Figure 2 and Figure 3To achieve the above objectives, this utility model provides a pre-filter stack, comprising a plurality of filter discs, each filter disc comprising a filter disc body 110 and a first filter layer 120. The filter disc body 110 has an annular structure and includes a first filter side 111 located on one side of the filter disc body 110 along its own axial direction. All filter discs are stacked sequentially along the axial direction of the filter disc body 110 for assembly onto the outer frame of the pre-filter. Specifically, a plurality of filter discs are sequentially fitted onto the outer periphery of the outer frame along the axial direction of the filter disc body 110 to form a pre-filter stack for filtering raw water. The outer frame is used for the installation and positioning of the filter discs. The outer frame and the pre-filter stack are assembled together inside the filter bottle of the pre-filter, and there is a first space between the filter discs and the filter bottle for accommodating the raw water entering the filter bottle through the inlet. After being filtered by the pre-filter stack, the raw water flows to the inner periphery of the filter disc body 110 and then flows out of the pre-filter through the outlet.

[0037] The first filter layer 120 is an annular protrusion structure protruding from the surface of the first filter side 111. The first filter layer 120 includes a first inner side facing the axis of the filter body 110, a first outer side facing away from the axis of the filter body 110 and having a wavy structure, and a plurality of first water passage grooves 123 extending from the first outer side to the first inner side. A first ridge 124 protruding from the surface of the first filter side 111 is formed between adjacent first water passage grooves 123. That is, a first water passage groove 123 can also be formed between adjacent first ridges 124. The first water passage grooves 123 and the first ridges 124 are alternately arranged. The first ridges 124 separate adjacent first water passage grooves 123 to avoid the cross-section of the first water passage groove 123 being too large, thereby ensuring the filtration effect of the first filter layer 120. The first water passage grooves 123 are used to allow liquid to flow between the first outer side and the first inner side. The minimum cross-section and the cross-sectional variation law of the first water passage groove 123 can refer to the prior art.

[0038] It should be noted that the wavy structure of the first outer surface means that the first outer surface exhibits a continuous and regular alternation of peaks and troughs, or that the overall shape of the first outer surface approximates the outer contour of an involute gear. The first outer surface has a certain regular curved profile, and can also be viewed as an inwardly folded cylindrical surface, which has a larger surface area than a cylindrical surface with a uniform height and diameter.

[0039] The filter body 110 has an annular structure. The first filter layer 120 is disposed on the first filter side 111 located on the axial side of the filter body 110. By forming a first water passage groove 123 between the first inner side facing the axis of the filter body 110 and the first outer side facing away from the axis of the filter body 110 in the first filter layer 120, the raw water located on the outer periphery of the first filter layer 120 can be filtered by the first filter layer 120 and then enter the inner periphery of the first filter layer 120. The first outer side of the first filter layer 120 has a wavy structure. Compared with the circular structure of the first outer side in the prior art, it can increase the contact area between the first outer side and the raw water without changing the filtration accuracy. This increases the contact area between the first water passage groove 123 located on the first outer side and the raw water, thereby increasing the filtration area and improving the flow rate of the filter per unit time, thus improving the user experience. In addition, the increase in filtration area within the same time effectively reduces the surface clogging rate, thereby increasing the working time of the pre-filter stack.

[0040] In one possible implementation, the filter body 110 further includes a second filter side parallel to and opposite to the first filter side 111. The filter also includes a second filter layer, which is an annular protrusion structure protruding from the surface of the second filter side. The second filter layer includes a second inner side facing the axis of the filter body 110, a second outer side facing away from the axis of the filter body 110 and having a wavy structure, and a plurality of second water passage grooves extending from the second outer side to the second inner side. A second ridge protruding from the surface of the second filter side is formed between adjacent second water passage grooves. The second water passage grooves are used to allow liquid to flow between the second outer side and the second inner side.

[0041] The second water passage groove and the second protruding strip are alternately arranged. The second protruding strip separates adjacent second water passage grooves to avoid an excessively large cross-section, thereby ensuring the filtration effect of the second filter layer. Both the second outer surface and the first outer surface have a wavy structure. The second outer surface can also increase the contact area between the second outer surface and the raw water without changing the filtration accuracy, thus increasing the contact area between the end of the second water passage groove on the second outer surface and the raw water. This increases the filtration area, thereby increasing the flow rate of the filter per unit time and improving the user experience.

[0042] A first filter layer 120 is provided on the first filtration side 111 of the filter body 110, and a second filter layer is provided on the second filtration side of the filter body 110. Raw water can flow from the outside of the first filter layer 120 and the second filter layer to the inside for filtration. Compared with the filter body 110 only having the first filter layer 120 or the second filter layer, the filtration area is doubled, which significantly increases the processing flow rate per unit time, reduces the retention of raw water in the filter bottle, and improves the overall filtration efficiency. At the same time, the first filter layer 120 and the second filter layer on both sides of the filter body 110 disperse the impurity deposition pressure, reduce the risk of unilateral blockage of the filter body 110, and extend the maintenance cycle.

[0043] In one possible implementation, the width of the first water passage 123 gradually decreases along its extension direction; and / or, the width of the second water passage gradually decreases along its extension direction. The extension direction of the first water passage 123 is consistent with the flow direction of the raw water flowing through it during filtration, and the extension direction of the second water passage is consistent with the flow direction of the raw water flowing through it during filtration. When the cross-sectional area of ​​the water passage decreases, the flow velocity increases. The gradually decreasing structure causes the raw water velocity to gradually increase, which helps to improve filtration efficiency and reduces particle deposition on the surface of the water passage, thereby delaying clogging. Furthermore, the flow direction of the raw water in the water passage during filtration is opposite to the flow direction of the fluid (which can be raw water) in the water passage during filter layer cleaning. That is, during filter layer cleaning (backwashing state), the first and second water passages are gradually expanding structures along the fluid flow direction, utilizing fluid deceleration and diffusion to achieve efficient reverse cleaning.

[0044] In one possible implementation, the first inner surface has a wavy structure; and / or, the second inner surface has a wavy structure. That is, the shape of the first inner surface is similar to that of the first outer surface. By setting the first inner surface to have a regular curved profile or an inwardly folded cylindrical surface, the first inner surface has a larger surface area compared to a cylindrical surface with a uniform height and diameter. Without changing the filtration accuracy, the contact area between the first inner surface and the fluid can be increased, thereby increasing the surface area of ​​the first water passage trough 123 located at the end of the first inner surface for fluid outflow. This increases the outlet area of ​​the fluid filter, thereby increasing the flow rate of the filter per unit time, improving the user experience, and at the same time, shortening part of the length of the first water passage trough 123, further improving the filtration efficiency.

[0045] Similarly, the second inner surface has a similar shape to the second outer surface. By setting the second inner surface to a regular curved profile or an inwardly folded cylindrical surface, the second inner surface has a larger surface area compared to a cylindrical surface with a uniform height and diameter. Without changing the filtration accuracy, this increases the contact area between the second inner surface and the fluid, thereby increasing the surface area of ​​the end of the second water passage located on the second inner surface for fluid outflow. This increases the outlet area of ​​the fluid filter, thereby increasing the flow rate of the filter per unit time, improving the user experience, and at the same time, it can shorten part of the length of the second water passage, further improving the filtration efficiency.

[0046] It should be noted that there is no intersection between the first inner side and the first outer side, that is, the first inner side and the first outer side are spaced apart; there is no intersection between the second inner side and the second outer side, that is, the second inner side and the second outer side are spaced apart, in order to maintain a complete water passage layout.

[0047] Please see Figure 4 and Figure 5 In one possible implementation, the first protrusion 124 includes a first fixed end 125 facing the axis of the filter body 110 and a second fixed end 126 away from the axis of the filter body 110, the extension direction of the first protrusion 124 being deflected by a first angle relative to the radial direction of the first fixed end 125; the second protrusion includes a third fixed end facing the axis of the filter body 110 and a fourth fixed end away from the axis of the filter body 110, the extension direction of the second protrusion being deflected by a second angle relative to the radial direction of the third fixed end; the first protrusion 124 and the second protrusion in the same filter body... The deflection directions are opposite. For example, from the same viewing angle, the first protrusion 124 deflects clockwise and the second protrusion deflects counterclockwise. This eliminates the need to distinguish between the front and back during filter installation, meaning no orientation needs to be specified. For instance, from the same viewing angle, when the first protrusion 124 deflects clockwise and the second protrusion deflects counterclockwise, after reversing the first filter layer 120 and the second filter layer of the filter, from this viewing angle, the second protrusion appears to deflect clockwise and the first protrusion 124 appears to deflect counterclockwise, which is not significantly different from before the filter was reversed.

[0048] In one possible implementation, both the first angle and the second angle are 40°-70°, and both the first angle and the second angle are preferably 60°. That is, the angle between the first protrusion 124 and the radial direction of any point on the first protrusion 124 is 60°, and the angle between the second protrusion and the radial direction of any point on the second protrusion is 60°. The first angle and the second angle can be adjusted according to the actual situation, as long as the above purpose can be achieved.

[0049] Please see Figure 6In one possible implementation, a filter structure including a first filter layer 120 and a second filter layer is formed between adjacent filter bodies 110. The first water passage 123 and the second water passage in the filter structure are interlaced and connected to form a honeycomb filter channel. The first water passage 123 and the second water passage on both sides of the filter sheet are at a certain angle to the radial direction, and the first convex strip 124 forming the first water passage 123 and the second convex strip forming the second water passage are arranged in a cross pattern. This makes the water passages in the filter layers (one first filter layer 120 and one second filter layer, or two first filter layers 120, or two second filter layers) on the adjacent filter sheets in a cross-shaped contact, ensuring that the cross-sectional area of ​​the water passages meets the requirements of filtration accuracy. The interconnectivity between the cross-shaped water passages forms a honeycomb filter channel in the filter structure space, ensuring filtration efficiency. In addition, the adjacent filter sheets can be stacked randomly, that is, the projections of adjacent filter sheets in the direction of extension of the axis are consistent after rotating around their own axis by a preset angle, so as to simplify the installation process of the filter sheets and improve the assembly efficiency.

[0050] This application also provides a pre-filter, including the pre-filter stack as described above. The pre-filter also has all the beneficial effects of the pre-filter stack. The pre-filter also includes a filter bottle and an outer frame installed inside the filter bottle. The outer frame is used for the pre-filter stack, and there is a receiving space between the pre-filter stack and the filter bottle. After the pre-filter stack is installed, the pre-filter stack can be pressed together in the installation direction by a fastener to ensure that adjacent filter plates abut against each other to form a honeycomb filter channel for filtering raw water located in the receiving space.

[0051] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A pre-filter stack, characterized in that, It includes several filter elements, each of which comprises: The filter body (110) has a ring structure. The filter body (110) includes a first filter side (111). The first filter side (111) is located on one side of the filter body (110) in its own axial direction. All the filter sheets are stacked sequentially in the axial direction of the filter body (110). The first filter layer (120) is an annular protrusion structure protruding from the surface of the first filter side (111). The first filter layer (120) includes a first inner side facing the axis of the filter body (110), a first outer side facing away from the axis of the filter body (110) and having a wavy structure, and a plurality of first water passage grooves (123) extending from the first outer side to the first inner side. A first ridge (124) protruding from the surface of the first filter side (111) is formed between adjacent first water passage grooves (123). The first water passage grooves (123) are used to allow liquid to flow between the first outer side and the first inner side.

2. The pre-filter stack according to claim 1, characterized in that, The filter body (110) also includes a second filter side that is parallel to and opposite to the first filter side (111). The filter also includes a second filter layer. The second filter layer is an annular protrusion structure protruding from the surface of the second filter side. The second filter layer includes a second inner side facing the axis of the filter body (110), a second outer side facing away from the axis of the filter body (110) and having a wavy structure, and a plurality of second water passage grooves extending from the second outer side to the second inner side. A second ridge protruding from the surface of the second filter side is formed between adjacent second water passage grooves. The second water passage grooves are used to allow liquid to flow between the second outer side and the second inner side.

3. The pre-filter stack according to claim 2, characterized in that, The width of the first water passage (123) gradually decreases along its own extending direction; and / or, The width of the second water passage gradually decreases along its extension direction.

4. The pre-filter stack according to claim 2, characterized in that, The first inner surface has a wavy structure; and / or, The second inner surface has a wavy structure.

5. The pre-filter stack according to claim 2, characterized in that, The first protrusion (124) includes a first fixed end (125) facing the axis of the filter body (110) and a second fixed end (126) facing away from the axis of the filter body (110). The extension direction of the first protrusion (124) is deflected by a first angle relative to the radial direction of the first fixed end (125). The second protrusion includes a third fixed end facing the axis of the filter body (110) and a fourth fixed end facing away from the axis of the filter body (110), and the extension direction of the second protrusion is deflected by a second angle relative to the radial direction of the third fixed end.

6. The pre-filter stack according to claim 5, characterized in that, The first ridge (124) in the same filter sheet deflects in the opposite direction to the second ridge.

7. The pre-filter stack according to claim 5, characterized in that, Both the first angle and the second angle are 40°-70°.

8. The pre-filter stack according to claim 6, characterized in that, A filter structure comprising a first filter layer (120) and a second filter layer is formed between adjacent filter bodies (110), wherein the first water passage (123) and the second water passage in the filter structure are interleaved and connected to form a honeycomb filter channel.

9. A pre-filter, characterized in that, Includes the pre-filter stack as described in any one of claims 1-8.

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