Filtering device and water purifier

Abstract

The present application relates to a kind of filtering device and water purifier, filtering device filtering device includes filter cylinder, center tube, RO membrane assembly and carbon rod filter core.Filtering cylinder is equipped with water inlet and outlet end cover and sealing end cover at both ends;Center tube is arranged in the inside of filter cylinder, and RO membrane assembly is arranged between center tube and filter cylinder;Center tube side wall is provided with through-hole;Water inlet and outlet end cover is equipped with water inlet and water outlet.Carbon rod filter core is plug-inly arranged in the inside of center tube, and its inside water outlet passage is communicated with water outlet;Carbon rod filter core one end is coaxially connected plug-in piece, plug-in piece is located between sealing end cover and filter cylinder, and outside wall is convexly provided with limit block;Filter cylinder is equipped with limit cover towards sealing end cover one end, and the hole wall of the avoidance hole of limit cover is provided with gap and limit portion communicated with gap.The limit block of the present application is rotated carbon rod filter core after passing through gap, so that limit block is rotated into limit portion, limit carbon rod filter core axial movement, realize carbon rod filter core quick replacement, reduce use cost.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and in particular to a filtration device and a water purifier. Background Technology

[0002] Under-sink water purifiers are multi-stage, series-connected deep purification systems with reverse osmosis membranes at their core. Existing filtration systems typically include PP cotton filters, activated carbon filters, RO reverse osmosis membrane filters, and post-activated carbon filters, with each stage functioning independently and complementing each other. However, existing carbon rod filters are generally fixed inside the filtration system and cannot be disassembled or replaced. After a period of use, the filtration efficiency of the carbon rod filter decreases, requiring users to replace the entire filtration system, leading to increased operating costs. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a filtration device and a water purifier to solve the problem that existing carbon rod filter cartridges cannot be replaced individually.

[0004] To achieve the above objectives, a first aspect of the present invention provides a filtration device, comprising a filter cylinder, a central tube, and a carbon rod filter element; the filter cylinder is provided with an inlet / outlet end cap and a sealing end cap at its two ends; the central tube is disposed at the center of the filter cylinder, and an RO membrane assembly is disposed between the central tube and the filter cylinder, the side wall of the central tube having a through hole communicating with the RO membrane assembly; the inlet / outlet end cap has an inlet and an outlet, the inlet communicating with the RO membrane assembly; one end of the carbon rod filter element passes through the central tube and is detachably disposed inside the central tube, the interior of the carbon rod filter element having an outlet channel communicating with the outlet, the central tube... The inside of the pipe is connected to the water outlet channel via the carbon rod filter element; a plug-in component is coaxially provided at the other end of the carbon rod filter element, the plug-in component is located between the sealing end cap and the filter cylinder, and the outer side wall of the plug-in component protrudes to form a limiting block; a limiting cap is provided at one end of the filter cylinder facing the sealing end cap, the limiting cap is provided with a clearance hole for the carbon rod filter element and the plug-in component to pass through, the hole wall of the clearance hole is recessed radially outward to form a notch for the limiting block to pass through, the notch is recessed circumferentially to form a limiting part, after the limiting block passes through the notch, the limiting block is driven into the limiting part by rotating the carbon rod filter element to restrict the axial movement of the carbon rod filter element.

[0005] Therefore, in the filtration device according to the present invention, the carbon rod filter element is detachably installed inside the central tube, and axially locked by the engagement of the insertion / removal component with the notch and limiting part on the limiting cover. This makes the carbon rod filter element an independent replaceable unit, eliminating the need to replace the entire filtration device and reducing operating and maintenance costs. When the carbon rod filter element reaches the end of its service life, simply rotate the carbon rod filter element to rotate the limiting block on the insertion / removal component out of the limiting part and back to the notch position, and the insertion / removal component along with the carbon rod filter element can be pulled out of the central tube axially, completing the disassembly. When installing a new carbon rod filter element, insert the carbon rod filter element into the central tube, let the limiting block pass through the notch, and then rotate the carbon rod filter element in the opposite direction. The limiting block screws into the limiting part, thus restricting the axial movement of the carbon rod filter element and restoring the installation state. The entire replacement process only requires rotation and insertion / removal operations, without the need to disassemble the filter cylinder, RO membrane assembly, inlet / outlet end caps, or sealing end caps. The operation is simple and quick, effectively reducing maintenance time and avoiding the waste caused by replacing the entire filtration device due to carbon rod filter element failure.

[0006] In one embodiment, the outer peripheral wall of the carbon rod filter element is sealed to the opening of the central tube by a sealing element; the insertion / removal component includes an insertion / removal post and an insertion / removal handle, the limiting block is disposed on the insertion / removal post, the insertion / removal post is coaxially disposed with the carbon rod filter element, and the insertion / removal handle is rotatably disposed at the end of the insertion / removal post away from the carbon rod filter element. Thus, the sealing element prevents water from bypassing the opening of the central tube, ensuring that all water flows through the carbon rod filter element for filtration; the rotatable insertion / removal handle facilitates gripping and rotation by the user, improving replacement convenience.

[0007] In one implementation, the plug-in handle is a plate-shaped structure or a U-shaped structure. Thus, the plate-shaped structure can mate with the clearance groove, and the U-shaped structure facilitates finger insertion and operation, adapting to different structural spaces.

[0008] In one embodiment, two notches are symmetrically arranged on the wall of the clearance hole, and two limiting blocks are symmetrically arranged on the outer peripheral wall of the insertion / removal component, with two corresponding limiting portions. This symmetrical arrangement ensures that the insertion / removal component experiences uniform force during rotational locking, preventing deflection and making axial limiting more reliable.

[0009] In one embodiment, the end face of the sealing end cap is recessed to form a relief groove. The relief groove has a through hole for the carbon filter element and the insert to pass through. A handle is rotatably disposed in the relief groove, one end of which is rotatably mounted on the relief groove, and the other end is movably engaged with the sealing end cap. The handle abuts against and presses against the insert. Thus, the handle can be used to press the insert firmly, preventing the limiting block from dislodging from the limiting part due to water pressure fluctuations or vibration, thereby improving connection reliability.

[0010] In one embodiment, the plug-in handle abuts against the clearance groove, the plug-in handle is perpendicular to the plug-in post, and the lifting handle abuts and presses against the plug-in handle. This structure makes the lifting handle more stable, prevents the plug-in handle from wobbling, and improves the overall structural compactness.

[0011] In one implementation, the plug-in post is detachably connected to one end of the carbon filter element. Therefore, the plug-in post can be reused when replacing the carbon filter element, reducing consumable costs.

[0012] In one implementation, the inlet and outlet caps are also provided with a wastewater outlet, which is connected to the RO membrane module. This allows the concentrated water produced by the RO membrane filtration to be discharged promptly, preventing its accumulation and extending the service life of the RO membrane module.

[0013] In one implementation, the central tube is coaxially arranged with the filter cylinder. This creates a uniform annular flow channel in the RO membrane assembly, resulting in more even water flow distribution and higher filtration efficiency.

[0014] A second aspect of the present invention provides a water purifier comprising the filtration device described in any of the preceding claims. This water purifier possesses all the beneficial effects of the aforementioned filtration devices, particularly the carbon rod filter element, which allows for quick disassembly and assembly, convenient maintenance, and low operating costs.

[0015] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of the filtration device according to an embodiment of the present invention; Figure 2 This is a second schematic diagram of the structure of the filtration device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the filter device according to an embodiment of the present invention after the handle is opened; Figure 4 This is a schematic diagram of the carbon rod filter element being pulled out of the filtration device according to an embodiment of the present invention; Figure 5 This is one of the cross-sectional schematic diagrams of the filtration device according to an embodiment of the present invention; Figure 6 This is a second cross-sectional schematic diagram of the filtration device according to an embodiment of the present invention; Figure 7 for Figure 6 An enlarged schematic diagram of part A shown; Figure 8 This is one of the schematic diagrams showing the connection between the insert / removal component and the limiting cover of the carbon rod filter element according to an embodiment of the present invention; Figure 9This is the second schematic diagram showing the connection between the insert / removal component and the limiting cover of the carbon rod filter element in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 10. Filter cylinder; 11. Limiting cover; 12. Clearance hole; 13. Notch; 14. Limiting part; 20. Central tube; 21. Through hole; 30. RO membrane module; 40. Carbon rod filter element; 41. Water outlet channel; 42. Insert / remove part; 43. Limiting block; 44. Insert / remove column; 45. Insert / remove handle; 50. Inlet / outlet end caps; 51. Water inlet; 52. Water outlet; 53. Wastewater outlet; 60. Sealing end cap; 61. Clearance groove; 62. Handle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0020] In related technologies, under-sink water purifiers are multi-stage series deep purification systems with reverse osmosis membranes at their core. Existing filtration devices typically include PP cotton filters, activated carbon filters, RO reverse osmosis membrane filters, and post-activated carbon filters, with each filter having independent functions and complementary mechanisms. However, existing carbon rod filters are generally fixed inside the filtration device and cannot be disassembled or replaced. After a period of use, the filtration efficiency of the carbon rod filter decreases, requiring users to replace the entire filtration device, leading to increased operating costs.

[0021] In view of this, the present invention provides a filtration device and a water purifier. According to the filtration device and water purifier of the present invention, after the limiting block 43 passes through the notch 13, it rotates the carbon rod filter element 40, causing the limiting block 43 to screw into the limiting part 14, restricting the axial movement of the carbon rod filter element 40, thereby enabling rapid replacement of the carbon rod filter element 40 and reducing usage costs.

[0022] Please see Figures 1 to 9The first aspect of the present invention provides a filtration device, including a filter cylinder 10, a central tube 20, an RO membrane assembly 30, a carbon rod filter element 40, a plug-in component 42, a limiting cover 11, a sealing end cover 60, and an inlet / outlet end cover 50.

[0023] Specifically, the filter housing 10 is a cylindrical shell open at both ends, with a central tube 20 disposed at its center, coaxially arranged with the filter housing 10. An annular space is formed between the central tube 20 and the filter housing 10, within which the RO membrane module 30 is disposed. A through hole 21 is formed through the side wall of the central tube 20, connecting the interior of the central tube 20 to the permeate side of the RO membrane module 30. The RO membrane module 30 can be a spiral wound membrane element or a hollow fiber membrane element, with its inlet side connected to the inlet 51 on the inlet / outlet end cap 50, and its concentrate side connected to the wastewater outlet 53. The inlet / outlet end cap 50 is located at one end of the filter housing 10, and a sealing end cap 60 is located at the other end of the filter housing 10. The inlet and outlet end caps 50 are provided with an inlet 51, an outlet 52 and a wastewater outlet 53. The inlet 51 is connected to the inlet side of the RO membrane module 30, the wastewater outlet 53 is connected to the concentrate side of the RO membrane module 30, and the outlet 52 is connected to the inside of the central tube 20 for discharging pure water filtered by the carbon rod filter element 40.

[0024] The carbon rod filter element 40 is a columnar filter element with an axially extending outlet channel 41 inside. The carbon rod filter element 40 has a first end and a second end. The first end is inserted into the central tube 20 near the sealing end cap 60 and can be pulled out axially, achieving a pluggable connection. A sealing element, such as one or more O-rings, is provided between the outer peripheral wall of the carbon rod filter element 40 and the opening of the central tube 20 to prevent water in the central tube 20 from flowing directly out through the gap between the carbon rod filter element 40 and the central tube 20, ensuring that water in the central tube 20 can only permeate into the outlet channel 41 through the side wall of the carbon rod filter element 40. The internal outlet channel 41 of the carbon rod filter element 40 communicates with the outlet 52 on the inlet / outlet end cap 50.

[0025] Furthermore, a plug-in component 42 is coaxially connected to the second end of the carbon rod filter element 40. This plug-in component 42 includes a plug-in post 44 and a plug-in handle 45. The plug-in post 44 is coaxially arranged with the carbon rod filter element 40, and one end of the plug-in post 44 is detachably connected to the second end of the carbon rod filter element 40. This detachable connection can be achieved through threaded connection, snap-fit ​​connection, bolt connection, or plug-in connection. The other end of the plug-in post 44 is provided with the plug-in handle 45, which is rotatably connected to the plug-in post 44, allowing the handle to rotate between a retracted state and an operational state. The plug-in handle 45 can be a plate-like structure or a U-shaped structure. Additionally, a limiting block 43 protrudes from the outer wall of the plug-in post 44. One or more limiting blocks 43 can be provided, preferably two symmetrically arranged. The limiting block 43 protrudes radially outward along the plug-in post 44, and its width matches the notch 13 on the limiting cover 11.

[0026] Correspondingly, a limiting cover 11 is fixedly provided at the end of the filter cylinder 10 facing the sealing end cover 60. A clearance hole 12 is formed in the middle of the limiting cover 11, through which the carbon rod filter element 40 and the insert / pull-out member 42 pass. The wall of the clearance hole 12 is radially recessed outward to form a notch 13, which allows the limiting block 43 to pass axially. One end of the notch 13 continues to be recessed in the circumferential direction to form a limiting portion 14, which is a groove extending in the circumferential direction, and its axial width is adapted to the thickness of the limiting block 43. After the limiting block 43 passes through the notch 13, the insert / pull-out member 42 is rotated, and the limiting block 43 enters the limiting portion 14 from the notch 13. The groove wall of the limiting portion 14 limits the limiting block 43 axially, thereby preventing the insert / pull-out member 42 and the carbon rod filter element 40 from moving axially. Among them, two notches 13 and limiting parts 14 on the limiting cover 11 can be symmetrically arranged, corresponding one-to-one with the two limiting blocks 43 on the insertion and removal post 44.

[0027] Furthermore, the sealing end cap 60 is located at the end of the filter cylinder 10 away from the inlet / outlet end cap 50 and is fixedly connected to the filter cylinder 10. The outer end face of the sealing end cap 60 is recessed to form a relief groove 61. A through hole is provided in the relief groove 61, which is coaxially arranged with the relief hole 12 on the limiting cover 11, for the carbon rod filter element 40 and the insertion piece 42 to pass through. In addition, a handle 62 is provided in the relief groove 61. One end of the handle 62 is rotatably mounted on the groove wall of the relief groove 61 via a rotating shaft or torsion spring, and the other end is a movable end that can be snapped onto the sealing end cap 60. The inner side of the handle 62 can abut against and press the plug-in component 42. In one specific embodiment, the plug-in handle 45 abuts against the bottom of the relief groove 61 in the retracted state. The plug-in handle 45 is perpendicular to the plug-in post 44. When the handle 62 is closed, it abuts against and presses against the plug-in handle 45, thereby further fixing the plug-in component 42 in both the axial and circumferential directions. When it is necessary to replace the carbon rod filter element 40, the handle 62 can be opened to expose the plug-in handle 45 for operation.

[0028] The working process of the filtration device of the present invention is as follows: Tap water enters the filter cylinder 10 through the inlet 51 of the inlet / outlet end cap 50 and flows into the inlet side of the RO membrane module 30. The RO membrane module 30 performs reverse osmosis filtration on the water, removing impurities such as ions, heavy metals, and bacteria. The water filtered by the RO membrane module 30 enters the interior of the central tube 20 through the through hole 21 on the side wall of the central tube 20. Under pressure, the water in the central tube 20 flows towards the carbon rod filter element 40. Because a seal is provided between the carbon rod filter element 40 and the opening of the central tube 20, the water can only permeate from the side wall of the carbon rod filter element 40 into the outlet channel 41 inside the carbon rod filter element 40. The carbon rod filter element 40 performs deep filtration on the water flow, for example, further adsorbing residual chlorine and organic matter to improve the taste. Finally, the filtered water flows from the outlet channel 41 of the carbon rod filter element 40 to the outlet 52 of the inlet / outlet end cap 50 and is discharged from the outlet 52 for user use. The concentrated water produced by the RO membrane module 30 is discharged from the wastewater outlet 53.

[0029] The replacement process of the carbon rod filter element 40 of the present invention is as follows: When it is necessary to replace the carbon rod filter element 40, first open the handle 62 on the sealing end cover 60, so that the movable end of the handle 62 is disengaged from the sealing end cover 60, and rotate it to a position that does not obstruct operation. At this time, the insertion and removal handle 45 is exposed in the relief groove 61. Hold the insertion and removal handle 45 and apply rotational force. The insertion and removal handle 45 drives the insertion and removal column 44 and the carbon rod filter element 40 to rotate together, so that the limiting block 43 rotates out from the limiting part 14 and returns to the notch 13 position. At this time, the limiting block 43 and the notch 13 are aligned in the axial direction. Pull the insertion and removal handle 45 outward in the axial direction to pull the insertion and removal part 42 together with the carbon rod filter element 40 out of the central tube 20. Take a new carbon filter element 40 and insert it into the central tube 20. At the same time, align the limiting block 43 on the insertion post 44 with the notch 13 on the clearance hole 12 of the limiting cover 11. After pushing it into place, rotate the insertion handle 45 so that the limiting block 43 is screwed into the limiting part 14 from the notch 13. At this time, the carbon filter element 40 and the insertion part 42 are axially locked. Finally, close the handle 62 so that the movable end of the handle 62 is re-engaged on the sealing end cover 60 and abuts against and presses the insertion handle 45 to complete the replacement operation.

[0030] The insertion / removal post 44 is detachably connected to the carbon filter element 40. Therefore, when the carbon filter element 40 reaches the end of its service life, only the carbon filter element 40 can be replaced while the insertion / removal post 42 is retained, further reducing operating costs. Alternatively, the insertion / removal post 42 and the carbon filter element 40 can be replaced as a single unit.

[0031] A second aspect of the present invention provides a water purifier comprising the filtration device described in any of the preceding claims. This water purifier possesses all the beneficial effects of the aforementioned filtration devices, particularly the carbon rod filter element 40, which allows for quick disassembly and assembly, convenient maintenance, and low operating costs.

[0032] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the filtration device and water purifier. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A filtration device, characterized in that: The filter includes a filter cylinder, a central tube, and a carbon rod filter element. The filter cylinder has inlet and outlet caps and a sealing cap at both ends. The central tube is located at the center of the filter cylinder, and an RO membrane assembly is disposed between the central tube and the filter cylinder. The side wall of the central tube has a through hole connecting its interior to the RO membrane assembly. The inlet and outlet caps have an inlet and an outlet, with the inlet connected to the RO membrane assembly. One end of the carbon rod filter element passes through the central tube and is pluggably disposed inside the central tube. The interior of the carbon rod filter element is provided with a water outlet channel communicating with the water outlet. The interior of the central tube is connected to the water outlet channel via the carbon rod filter element. The other end of the carbon rod filter element is coaxially provided with a pluggable component. The pluggable component is located between the sealing end cap and the filter cylinder. The outer side wall of the pluggable component protrudes to form a limiting block. A limiting cover is provided at one end of the filter cylinder facing the sealing end cover. The limiting cover has a clearance hole for the carbon rod filter element and the insertion piece to pass through. The wall of the clearance hole is recessed radially outward to form a notch for the limiting block to pass through. The notch is recessed circumferentially to form a limiting part. After the limiting block passes through the notch, the limiting block is screwed into the limiting part by rotating the carbon rod filter element to restrict the axial movement of the carbon rod filter element.

2. The filtration device according to claim 1, characterized in that: The outer peripheral wall of the carbon rod filter element and the opening of the central tube are sealed together by a sealing element; the insertion and removal element includes an insertion and removal post and an insertion and removal handle, the limiting block is disposed on the insertion and removal post, the insertion and removal post is coaxially disposed with the carbon rod filter element, and the insertion and removal handle is rotatably disposed at the end of the insertion and removal post away from the carbon rod filter element.

3. The filtration device according to claim 2, characterized in that: The plug-in handle is a plate-shaped structure or a U-shaped structure.

4. The filtration device according to claim 1, characterized in that: Two notches are symmetrically arranged on the wall of the clearance hole, two limiting blocks are symmetrically arranged on the outer peripheral wall of the insertion and extraction member, and two limiting parts are correspondingly provided.

5. The filtration device according to claim 2, characterized in that: The end face of the sealing end cap is recessed to form a relief groove. The relief groove has a through hole for the carbon rod filter element and the plug-in component to pass through. A handle is rotatably provided in the relief groove. One end of the handle is rotatably provided on the relief groove, and the other end is movably engaged with the sealing end cap. The handle abuts against and presses against the plug-in component.

6. The filtration device according to claim 5, characterized in that: The plug-in handle abuts against the clearance groove, the plug-in handle is perpendicular to the plug-in post, and the handle abuts against and presses against the plug-in handle.

7. The filtration device according to claim 2, characterized in that: The plug-in post is detachably connected to one end of the carbon plate filter element.

8. The filtration device according to claim 1, characterized in that: The inlet and outlet caps are also provided with a wastewater outlet, which is connected to the RO membrane module.

9. The filtration device according to claim 1, characterized in that: The central tube is coaxially arranged with the filter cylinder.

10. A water purifier, characterized in that: Includes the filtration device according to any one of claims 1 to 9.

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