A pre-filter

Abstract

This application provides a pre-filter, relating to the field of water purification technology. The pre-filter includes a filter base, a filter bottle, a filter element, a flow guide, and a scraping ball. The filter bottle is connected to the filter base, and the annular gap between the filter element and the filter bottle forms an external flow channel. The flow guide is located between the filter bottle and the filter element, and includes at least one rotating flow channel that forms a vortex water flow. In this structure, the vortex water flow formed by the flow guide drives the scraping ball to perform irregular motion, which can fully cover the surface of the filter element, performing all-round cleaning of the filter element surface, avoiding cleaning blind spots, effectively improving cleaning uniformity and cleaning effect, greatly reducing the frequency of filter element cleaning or replacement, extending the service life of the filter element, and improving the user experience.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and more specifically, to a pre-filter. Background Technology

[0002] A pre-filter is the first coarse filtration device for the whole house's water system, used to filter visible solid impurities such as rust, sediment, algae, and colloids from tap water. The filter cartridge, as its core filtration component, is prone to clogging or reduced filtration efficiency due to impurities accumulated over long-term use, requiring frequent cleaning or replacement and impacting the user experience. Utility Model Content

[0003] In order to at least overcome the above-mentioned shortcomings in the prior art, the purpose of this application is to provide a pre-filter.

[0004] In a first aspect, embodiments of this application provide a pre-filter, the pre-filter comprising:

[0005] The filter holder includes a first port and a second port;

[0006] The filter bottle is connected to the filter base;

[0007] The filter element includes an inner flow channel communicating with the second port, and the annular gap between the filter element and the filter bottle forms an outer flow channel communicating with the first port;

[0008] A flow guide is provided between the filter bottle and the filter element, and the flow guide includes at least one rotating flow channel that forms a vortex water flow;

[0009] The scraping ball is located inside the outer flow channel.

[0010] In one possible implementation, the flow guiding section includes a plurality of arc-shaped flow guiding ridges disposed on the inner wall of the filter bottle, and any two adjacent flow guiding ridges form a rotating flow channel; wherein, the flow guiding ridges are integrally formed with the inner wall of the filter bottle.

[0011] In one possible implementation, the guide ridge extends from one end of the filter bottle to the other end in a twisted manner around an axis, the inner surface of the rotating flow channel is a smooth curved surface, and the outer surface of the filter bottle forms a raised curved surface corresponding to the rotating flow channel.

[0012] In one possible implementation, the flow guide is located on the side of the filter element near the filter base. The flow guide includes a connecting mounting member and flow guide blades. The mounting member is annular in shape. The flow guide blades are circumferentially distributed. Any two adjacent flow guide blades form a rotating flow channel. At least a portion of the rotating flow channel is located between the first port and the outer flow channel.

[0013] In one possible implementation, the flow guide further includes an annular plate located inside the mounting component, and the flow guide blades are fixed to the annular plate;

[0014] The mounting component is located at the end of the filter bottle, and the guide vane extends into the filter bottle. After the filter bottle is screwed into the filter base, the mounting component is clamped between the end face of the filter bottle and the filter base.

[0015] In one possible implementation, the pre-filter further includes a drain assembly, the filter bottle includes a drain port, and the drain assembly is connected to the drain port.

[0016] In one possible implementation, the filter element further includes a flexible diaphragm located at one end away from the filter base;

[0017] The filter bottle has several limiting ribs on the side near the drain outlet. The flexible diaphragm is held in place in the filter bottle by the limiting ribs, dividing the filter bottle into a filtration chamber for accommodating the filter element and a sand collection chamber connected to the drain outlet. A sand settling port is formed between two adjacent limiting ribs, connecting the filtration chamber and the sand collection chamber.

[0018] In one possible implementation, the sewage discharge assembly includes a sand collection pipe and a sewage discharge ball valve, with one end of the sand collection pipe connected to the sewage outlet and the other end connected to the sewage discharge ball valve.

[0019] In one possible implementation, the size of the scraping ball is smaller than the distance between the outer wall of the filter element and the inner wall of the filter bottle, and the size of the scraping ball is larger than the distance between the outer wall of the flexible diaphragm and the inner wall of the filter bottle.

[0020] In one possible implementation, the scrubbing ball includes a first scrubbing ball and a second scrubbing ball;

[0021] The density of the first scraping ball is greater than the density of the second scraping ball;

[0022] The size of the first scrubbing ball is smaller than the size of the second scrubbing ball.

[0023] Based on any of the above aspects, the pre-filter provided in this application includes a filter base, a filter bottle, a filter element, a flow guide, and a scraping ball. The filter bottle is connected to the filter base, and the annular gap between the filter element and the filter bottle forms an outer flow channel, with the scraping ball located within the outer flow channel. The flow guide is disposed between the filter bottle and the filter element, and includes at least one rotating flow channel that forms a vortex water flow. In this structure, the vortex water flow formed by the flow guide drives the scraping ball to perform irregular motion, which can fully cover the surface of the filter element, performing all-round cleaning of the filter element surface, avoiding cleaning blind spots, effectively improving cleaning uniformity and cleaning effect, greatly reducing the frequency of filter element cleaning or replacement, extending the service life of the filter element, and improving the user experience. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of the pre-filter structure of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the pre-filter in this application;

[0027] Figure 3 This is an exploded view of the pre-filter structure of this application;

[0028] Figure 4 This is a cross-sectional view of a filter bottle according to another embodiment of this application;

[0029] Figure 5 This is a perspective view of a filter bottle according to another embodiment of this application;

[0030] Figure 6 This is a perspective view of the airflow guide section of this application;

[0031] Figure 7 This is a cross-sectional view of the filter bottle of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] It should be noted that, where there is no conflict, different features in the embodiments of this application can be combined with each other.

[0038] Please refer to Figure 1-3 This application provides a pre-filter 10, which includes a filter base 110, a filter bottle 120, a filter element 130, a flow guide 140, and a scraping ball 150.

[0039] The filter base 110 includes a first port 110A and a second port 110B. The filter bottle 120 is connected to the filter base 110. For example, the filter bottle 120 and the filter base 110 can be screwed together by mating threads, and an elastic sealing ring 160 ensures the sealing of the filter bottle 120 at the point where the port of the filter bottle 120 meets the filter base 110. The filter element 130 is coaxially disposed inside the filter bottle 120. The filter element 130 includes an inner flow channel L1 communicating with the second port 110B, and an annular gap between the filter element 130 and the filter bottle 120 forms an outer flow channel L2 communicating with the first port 110A. In the direction away from the filter base 110, the gap between the inner wall of the filter bottle 120 and the surface of the filter element 130 gradually decreases, making the outer flow channel L2 have a tapered structure along the stated direction. To further improve sealing reliability, an independent elastic sealing ring can be provided at the end of the filter element 130 near the filter base 110.

[0040] Specifically, the first port 110A can be connected to the inlet pipe to receive the tap water to be treated, and the second port 110B can be connected to the outlet to output filtered clean water. The tap water to be treated enters the outer flow channel L2 through the first port 110A, where the filter element 130 filters the tap water, isolating impurities in the tap water within the outer flow channel L2. The filtered water then flows out through the inner flow channel L1 from the second port 110B.

[0041] A flow guide 140 is disposed between the filter bottle 120 and the filter element 130. The flow guide 140 includes at least one rotating channel that forms a vortex water flow. When the water flows through the rotating channel, a continuous and stable vortex water flow is formed around the filter element 130. The scraping ball 150 is located in the outer flow channel L2. The scraping ball 150 generates irregular revolution, rotation, and collision motions under the action of the vortex water flow, continuously rubbing and scraping impurities on the surface of the filter element 130, providing a full-coverage cleaning of the filter element 130, and achieving a more thorough self-cleaning effect. The material of the scraping ball 150 includes, but is not limited to, plastic, rubber, etc.

[0042] In the above structure, the vortex water flow formed by the guide section 140 drives the scraping ball 150 to move irregularly, which can fully cover the surface of the filter element 130, clean the surface of the filter element 130 in all directions, avoid cleaning blind spots, effectively improve cleaning uniformity and cleaning effect, greatly reduce the frequency of cleaning or replacement of the filter element 130, extend the service life of the filter element 130, and improve the user experience.

[0043] In other implementations, please refer to Figure 4 and Figure 5The flow guiding section 140 includes a plurality of arc-shaped flow guiding ridges disposed on the inner wall of the filter bottle 120, and any two adjacent flow guiding ridges form a rotating flow channel L3. Specifically, the flow guiding ridges extend from one end of the filter bottle 120 to the other end in a twisted manner around the axis, and the inner surface of the rotating flow channel L3 is a smooth curved surface. The flow guiding ridges can be separately disposed from the filter bottle or integrally disposed with the filter bottle; preferably, the flow guiding ridges and the filter bottle are integrally disposed. In addition, the outer surface of the filter bottle 120 can form a raised curved surface 141 corresponding to the rotating flow channel L3, which enhances the appearance of the product and strengthens visual memorability.

[0044] In this embodiment, please refer to Figure 6 The flow guide 140 can be independently located on the side of the filter element 130 near the filter base 110. Specifically, the flow guide 140 may include connected flow guide vanes 142 and mounting members 143. The shape of the mounting member 143 can be located on the outer or inner side of the flow guide vanes 142, and its shape includes, but is not limited to, annular. The flow guide vanes 142 are circumferentially distributed, and any two adjacent flow guide vanes 142 can form a rotating flow channel L3, forming a continuous and stable vortex water flow around the filter element 130, enhancing the driving capability of the scraping ball 150.

[0045] Furthermore, to improve structural strength and stability, the flow guiding section 140 may also include an annular plate 144 located inside the mounting member 143, with the flow guiding blades 142 fixedly connected to the annular plate 144. Preferably, the flow guiding blades 142 and the annular plate 144 are integrally formed. The annular plate 144 and the mounting member 143 are coaxially arranged, and multiple flow guiding blades 142 are evenly spaced. The mounting member 143 is located at the end of the filter bottle 120, with the flow guiding blades 142 partially extending into the filter bottle 120. After the filter bottle 120 is screwed onto the filter base 110, the mounting member 143 is clamped between the end face of the filter bottle 120 and the filter base 110.

[0046] See Figure 1-3 The pre-filter 10 also includes a drain assembly 170, and the filter bottle 120 includes a drain port 123B. The drain assembly 170 is in close contact with the drain port 123B in a detachable or non-detachable manner. Under normal operating conditions, the drain assembly 170 remains closed to prevent pressure loss, while under self-cleaning conditions, the drain assembly 170 can be quickly opened to discharge accumulated impurities.

[0047] See Figure 7The end of the filter element 130 away from the filter base 110 is also covered with a flexible diaphragm 131, forming a one-way open internal flow channel L1. Several limiting ribs 121 are provided on the side of the filter bottle 120 near the drain port 123B. The sealing edge of the flexible diaphragm 131 cooperates with the limiting ribs 121 to hold the filter element 130 within the filter bottle 120, dividing the filter bottle 120 from top to bottom into a filtration chamber 122 for housing the filter element 130 and a sand collection chamber 123 communicating with the drain port 123B. The outer edge of the flexible diaphragm 131 extends radially outward to form a sealing edge, holding the filter element 130 within the filtration chamber 122. The material of the flexible diaphragm 131 includes, but is not limited to, silicone. Between two adjacent limiting ribs 121, a sand settling port 123A is formed, connecting the filter chamber 122 and the sand collection chamber 123. This allows the impurities stripped off by the scraping ball 150 to settle into the sand collection chamber 123 through the sand settling port 123 under the combined action of centrifugal force and gravity, preventing impurities from re-attaching to the surface of the filter element 130, further reducing the frequency of cleaning and replacing the filter element 130, and extending the service life of the filter element 130.

[0048] refer to Figure 2-3 The sewage discharge assembly 170 may include a sand collection pipe 171 and a sewage discharge ball valve 172. One end of the sand collection pipe 171 is threadedly connected to the sewage discharge port 123B, and the other end is connected to the sewage discharge ball valve 172. The sand collection pipe 171 is used to increase the sand collection space, further reducing the frequency of cleaning and replacement of the filter element 130. In self-cleaning mode, the sewage discharge ball valve 172 can be quickly opened to discharge impurities in the sand collection chamber 123 and the sand collection pipe 171. It is understood that the sand collection pipe 171 is only one possible implementation of the solution provided in this application. In actual applications, it can be replaced by other sand collection structures such as sand collection boxes and sand collection bottles. This application does not specifically limit this.

[0049] To prevent the scraping ball 150 from falling into the sand collection chamber 123 through the sand settling port 123A and being discharged, the size of the scraping ball 150 is larger than the maximum distance between the outer wall of the flexible diaphragm 131 and the inner wall of the filter bottle 120. Simultaneously, to allow the scraping ball 150 to move randomly within the outer flow channel L2, ensuring the effective scraping of the filter element 130 by the scraping ball 150, the size of the scraping ball 150 is smaller than the minimum distance between the outer wall of the filter element 130 and the inner wall of the filter bottle 120.

[0050] It should be noted that the shape of the scrubbing ball 150 can be spherical, ellipsoidal, etc., and the aforementioned "size" is related to the specific shape of the scrubbing ball 150. For example, if the shape of the scrubbing ball 150 is spherical, the aforementioned "size" refers to its diameter; if the shape of the scrubbing ball 150 is ellipsoidal, the aforementioned "size" refers to its minor axis.

[0051] To improve the scraping effect of the scraping balls 150, scraping balls 150 with different density distributions can be used depending on the specific situation. For example, the scraping balls 150 include a first scraping ball and a second scraping ball, with the density of the first scraping ball being greater than that of the second scraping ball. The first scraping ball scrapes the lower part of the filter element 130, while the second scraping ball scrapes the upper part of the filter element 130, reducing the scraping blind zone. For example, the first scraping ball can be a solid ball, and the second scraping ball can be a hollow ball. Furthermore, since the width of the outer flow channel L2 gradually decreases in the direction away from the filter seat 110, the risk of the scraping balls 150 getting stuck or clogged also increases. To reduce the risk of the first scraping ball getting stuck, the size of the first scraping ball can be smaller than that of the second scraping ball.

[0052] In summary, this application provides a pre-filter, including a filter base, a filter bottle, a filter element, a flow guide, and a scraping ball. The filter bottle is connected to the filter base, and the annular gap between the filter element and the filter bottle forms an external flow channel, within which the scraping ball is located. The flow guide is positioned between the filter bottle and the filter element, and includes at least one rotating flow channel that forms a vortex water flow. In this structure, the vortex water flow formed by the flow guide drives the scraping ball to perform irregular motion, comprehensively covering the surface of the filter element and cleaning it from all angles. This avoids blind spots, effectively improves cleaning uniformity and cleaning effect, significantly reduces the frequency of filter element cleaning or replacement, extends the filter element's service life, and enhances the user experience.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pre-filter, characterized in that, include: The filter holder includes a first port and a second port; The filter bottle is connected to the filter base; The filter element includes an inner flow channel communicating with the second port, and the annular gap between the filter element and the filter bottle forms an outer flow channel communicating with the first port; A flow guide is provided between the filter bottle and the filter element, and the flow guide includes at least one rotating flow channel that forms a vortex water flow; The scraping ball is located inside the outer flow channel.

2. The pre-filter according to claim 1, characterized in that, The flow guiding section includes a plurality of arc-shaped flow guiding ridges disposed on the inner wall of the filter bottle, and any two adjacent flow guiding ridges form a rotating flow channel; wherein, the flow guiding ridges are integrally formed with the inner wall of the filter bottle.

3. The pre-filter according to claim 2, characterized in that, The guide ridge extends from one end of the filter bottle to the other end in a twisted manner around the axis. The inner surface of the rotating flow channel is a smooth curved surface, and the outer surface of the filter bottle forms a raised curved surface corresponding to the rotating flow channel.

4. The pre-filter according to claim 1, characterized in that, The flow guide is located on the side of the filter element near the filter base. The flow guide includes a connecting mounting component and flow guide blades. The mounting component is annular in shape. The flow guide blades are circumferentially distributed. Any two adjacent flow guide blades form a rotating flow channel. At least a portion of the rotating flow channel is located between the first port and the outer flow channel.

5. The pre-filter according to claim 4, characterized in that, The flow guide section also includes an annular plate located inside the mounting component, and the flow guide blades are fixed to the annular plate; The mounting component is located at the end of the filter bottle, and the guide vane extends into the filter bottle. After the filter bottle is screwed into the filter base, the mounting component is clamped between the end face of the filter bottle and the filter base.

6. The pre-filter according to claim 1, characterized in that, The pre-filter also includes a drain assembly, and the filter bottle includes a drain port, with the drain assembly connected to the drain port.

7. The pre-filter according to claim 6, characterized in that, The filter element also includes a flexible diaphragm, which is located at the end away from the filter base; The filter bottle has several limiting ribs on the side near the drain outlet. The flexible diaphragm is held in place in the filter bottle by the limiting ribs, dividing the filter bottle into a filtration chamber for accommodating the filter element and a sand collection chamber connected to the drain outlet. A sand settling port is formed between two adjacent limiting ribs, connecting the filtration chamber and the sand collection chamber.

8. The pre-filter according to claim 7, characterized in that, The sewage discharge assembly includes a sand collection pipe and a sewage discharge ball valve. One end of the sand collection pipe is connected to the sewage discharge port, and the other end is connected to the sewage discharge ball valve.

9. The pre-filter according to claim 7, characterized in that, The size of the scraping ball is smaller than the distance between the outer wall of the filter element and the inner wall of the filter bottle, and the size of the scraping ball is larger than the distance between the outer wall of the flexible diaphragm and the inner wall of the filter bottle.

10. The pre-filter according to claim 9, characterized in that, The scraping ball includes a first scraping ball and a second scraping ball; The density of the first scraping ball is greater than the density of the second scraping ball; The size of the first scrubbing ball is smaller than the size of the second scrubbing ball.

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