Multistage filtering table type water purifier

Abstract

The invention discloses a multi-stage filtering table type water purifier, which comprises a machine room and a filter element, a detachable side baffle is arranged on one side of the machine room, and the multi-stage filtering table type water purifier further comprises a connecting seat, a water inlet pipe and a water outlet pipe, the connector is hinged to the connecting base, the connector has a first vertically-arranged state and a second state that the lower end of the connector obliquely swings out towards the outer side direction after the side baffle is detached in the rotating stroke, in the first state of the connector, the filter element is connected to the lower end of the connector and is limited in the machine room under the pressing force, and in the second state of the connector, the filter element is connected to the lower end of the connector and is limited in the machine room under the pressing force. And the filter element is movably and detachably connected with the connector. By arranging the rotatable and movable connector, the filter element can be conveniently dismounted and mounted, and in the first state of the connector, when the filter element is mounted at the lower end of the connector, pressing force is kept, so that on one hand, the filter element can be kept limited in the machine room, and on the other hand, tight connection between the connector and the filter element can be ensured; a traditional mode of plugging a soft cushion is replaced, and the sealing performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purifiers, and particularly to a multi-stage filtration tabletop water purifier. Background Art

[0002] A water purifier, also known as a water purification device or water quality purifier, is a water treatment device that deeply filters and purifies water quality according to the usage requirements of water. The water treatment method of the water purifier is usually filtration, which is divided into multiple stages of filtration to ensure the removal of various harmful impurities in water. Therefore, the technical core of the water purifier is the filter membrane in the filter element device, mainly including ultrafiltration membranes, RO reverse osmosis membranes, nanofiltration membranes, etc.

[0003] Patent document CN208389480U discloses a water purifier on January 18, 2019, which solves the problem that the water purification filtration device and the pure water heating device in the current water purifiers are separately arranged. The key points of its technical solution are a water purifier, including a water purification filtration device, a pure water heating device and a water purification housing. The water purification filtration device includes a raw water tank, a multi-stage filter element assembly and a water delivery pump. The pure water heating device includes a pure water tank, a rapid heater and a water extraction pump. The water purification housing has an installation inner cavity and an installation base on one side of the installation inner cavity. An installation bracket for installing the pure water tank is provided in the installation inner cavity. The outer side wall of the pure water tank has an installation groove for installing the rapid heater. The water delivery pump and the water extraction pump are arranged in the installation inner cavity and below the pure water tank. The multi-stage filter element assembly is installed in the installation inner cavity and on one side of the installation bracket close to the installation base. The raw water tank is installed on the installation base, and the structure of the water purifier is compact.

[0004] In the prior art such as the above patent, the filter element has a service life and needs to be replaced regularly. The filter element is usually installed on the connector provided on the water purifier. The connector will use a rotating method to facilitate the installation of the filter element. However, after the filter element is installed and aligned, its bottom will be suspended. The traditional fixing method will then insert soft pads such as foam and sponge at this bottom. However, this method is not only inconvenient, but also under the long-term hanging use of the filter element, it is easy to affect the connection sealing performance. Therefore, there is an urgent need for a multi-stage filtration tabletop water purifier to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-stage filtration tabletop water purifier to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A multi-stage filtration tabletop water purifier, comprising a machine chamber and a filter element installed inside the machine chamber. A detachable side baffle is provided on one side of the machine chamber, and further comprising: a connecting seat, which is elastically and movably connected inside the machine chamber; a connecting head, which is hinged on the connecting seat and has a first state arranged vertically and a second state in which the lower end tilts outwards in the direction of the outside after the side baffle is disassembled during the rotation stroke. In the first state of the connecting head, the filter element is connected to the lower end of the connecting head and is limited in the machine chamber under a pressing force. In the second state of the connecting head, the filter element is movably and detachably connected to the connecting head.

[0007] Preferably, a movable groove is provided on the inner wall of the machine chamber, a slider is arranged in the movable groove in a lifting and movable manner, an elastic member is arranged at the upper end of the slider, and the connecting seat is connected to the slider.

[0008] Preferably, a protruding portion that movably penetrates the inner wall of the machine chamber is provided on the slider, and the protruding portion is connected to the connecting seat through a fastening member.

[0009] Preferably, a groove for inserting the filter element is provided at the lower end of the connecting head, an annular groove is provided on the inner wall of the groove, an elastic sealing ring is arranged in the annular groove, a sealing groove matching the elastic sealing ring is provided at the upper end of the filter element, and a clamping assembly is arranged on the side wall of the connecting head. The clamping assembly controls the inner diameter of the elastic sealing ring to decrease when the connecting head is in the second state.

[0010] Preferably, the clamping assembly includes a clamping member movably arranged inside the connecting head. There is a break point on the elastic sealing ring, and extrusion portions that are wedge-shapedly matched with the clamping member are arranged on the outer sides of both ends formed at the break point. An abutting portion that slidably penetrates the outer side wall of the connecting head is arranged at one end of the clamping member away from the elastic sealing ring.

[0011] Preferably, a bushing is arranged on the connecting seat, and a shaft tube rotatably connected to the bushing is arranged on the connecting head.

[0012] Preferably, a conduit is inserted into the shaft tube, and each conduit is arranged in a filter pipeline.

[0013] Preferably, a hollow groove for the conduit to pass through is arranged inside the machine chamber, an extrusion member is movably arranged on one side of the hollow groove, the extrusion member and the slider are linked through a linkage assembly. When the slider is at the lowest position of the movable stroke in the movable groove, the extrusion member remains inserted into the hollow groove to press the conduit.

[0014] Preferably, the linkage assembly includes a sliding member fixedly connected to the extrusion member. A sliding groove matching the sliding member is arranged inside the machine chamber. A ramp body is fixedly arranged on the sliding member, and a pressing block wedge-shapedly matched with the ramp body is fixedly arranged at the lower end of the slider.

[0015] Preferably, the pipe wall of the conduit is elastically arranged.

[0016] In the above technical solution, the beneficial effects of the present invention are as follows: The multi-stage filtration tabletop water purifier is provided with a rotatable and movable connector, and the connector can be switched between a first state and a second state, thereby facilitating the disassembly and installation of the filter element. Moreover, when the filter element is installed at the lower end of the connector in the first state of the connector, it is kept under a pressing force. Thus, on the one hand, the filter element can be limited in the machine compartment, and on the other hand, the tight connection between the connector and the filter element can be ensured, replacing the traditional method of stuffing soft pads and improving the sealing performance.

[0017] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0018] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a complete disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0020] Figure 1 Schematic diagram of the overall structure after the side baffle is opened provided by an embodiment of the present invention; Figure 2 Schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 3 Front view sectional structure schematic diagram of the connector in the first state provided by an embodiment of the present invention; Figure 4 Provided by an embodiment of the present invention Figure 3 Enlarged structure schematic diagram of part A; Figure 5 Front view sectional structure schematic diagram of the connector in the second state provided by an embodiment of the present invention; Figure 6 Top view sectional structure schematic diagram of the groove provided by an embodiment of the present invention; Figure 7 Provided by an embodiment of the present invention Figure 6 Enlarged structure schematic diagram of part B; Figure 8 Top view sectional structure schematic diagram of the extrusion member provided by an embodiment of the present invention; Figure 9 Schematic diagram of the internal structure of the machine compartment provided by an embodiment of the present invention; Figure 10 Schematic diagram of the clamping assembly structure provided by the embodiment of the present invention.

[0021] Explanation of reference numerals: 1. Machine compartment; 2. Filter element; 3. Side baffle; 4. Connecting seat; 5. Connecting head; 6. Movable groove; 7. Slide block; 8. Elastic member; 9. Protruding portion; 10. Groove; 11. Concave annular groove; 12. Elastic sealing ring; 13. Sealing groove; 14. Clamping member; 15. Extrusion portion; 16. Abutting portion; 17. Sleeve; 18. Shaft tube; 19. Conduit; 20. Hollow groove; 21. Extrusion member; 22. Sliding member; 23. Sliding groove; 24. Ramp body; 25. Pressing block; 26. Fastener. Specific embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0023] Please refer to Figure 1-10 , A multi-stage filtration tabletop water purifier provided by the embodiment of the present invention includes a machine compartment 1 and a filter element 2 installed inside the machine compartment 1. A detachable side baffle 3 is provided on one side of the machine compartment 1. It further includes: a connecting seat 4, which is elastically and movably connected inside the machine compartment 1; a connecting head 5, which is hinged to the connecting seat 4 and has a first state vertically arranged and a second state in which the lower end tilts outwards in the direction away from the side baffle 3 during the rotation stroke. In the first state of the connecting head 5, the filter element 2 is connected to the lower end of the connecting head 5 and is subjected to a pressing force to be limited in the machine compartment 1. In the second state of the connecting head 5, the filter element 2 is movably and detachably connected to the connecting head 5.

[0024] Specifically, a water tank seat is provided on one side of the machine compartment 1 opposite to the side baffle 3, and a water tank is installed on the water tank seat; on the other side of the machine compartment 1, a water outlet head and a water receiving table are provided, and the water receiving table is arranged directly below the water outlet head; after the side baffle 3 is disassembled, one side of the machine compartment 1 is open, and the inside of the machine compartment 1 is exposed for the installation, disassembly or maintenance of the filter element 2; preferably, there are three filter elements 2, which are divided into: RO filter element, that is, a filter element using a reverse osmosis membrane, which can remove almost all pollutants such as heavy metals, bacteria, viruses, and inorganic substances in water and is the core purification unit of the water purification system; T33 filter element, which is a post-activated carbon, mainly optimizing the taste of water, adsorbing residual odor and chlorine, and inhibiting the growth of bacteria; PPC filter element, which is a composite filter element, usually including the combined functions of PP cotton and activated carbon, used to filter large particulate impurities and adsorb pollutants such as chlorine, abnormal color, and organic substances; the three filter elements are arranged in sequence in the filter pipeline according to the usage requirements; the inner wall of the machine compartment 1 is set as a curved surface that fits the shape of the filter element 2. The connecting seat 4 is connected inside the machine compartment 1, and the moving direction is set as a lifting movement; the connecting head 5 is used to install and connect the filter element 2, and a water flow channel is arranged inside, and is docked with the inlet and outlet on the filter element 2; the rotating shaft of the connecting head 5 is arranged on its side, and its rotating direction is to rotate and swing in the direction of the lower end approaching or moving away from the connecting seat 4. Then, after the side baffle 3 is disassembled, the lower end of the connecting head 5 can swing and switch its orientation to the inside and outside of the machine compartment 1; in the first state of the connecting head 5, that is, the connecting head 5 is vertically arranged, and the filter element 2 connected to the connecting head 5 is also vertically and completely received in the machine compartment 1. At the same time, under the height setting of the filter element 2, the connecting head 5 drives the connecting seat 4 to rise a certain height to generate an elastic force, so that the connecting head 5 exerts a downward pressing force on the filter element 2; in the second state of the connecting head 5, that is, the lower end of the connecting head 5 swings towards the outside of the machine compartment 1. At this time, the lower end of the filter element 2 connected to the connecting head 5 is completely moved out of the machine compartment 1; when switching between the first state and the second state of the connecting head 5, when the filter element 2 is connected to the connecting head 5, the lower end of the filter element 2 swings in and out of the inside of the machine compartment 1. In the actual use of this technical solution, when replacing the filter element 2, first open the side baffle 3, and then pull the lower end of the filter element 2 outward forcefully towards the outside of the machine compartment 1 to make the connecting head 5 swing and passively drive the connecting seat 4 to move upward. During this process, the connecting head 5 switches from the first state to the second state. After the lower end of the filter element 2 moves out of the machine compartment 1, it can be easily removed downward, and the connecting seat 4 automatically moves downward under the elastic force; then replace the new filter element 2 and insert the connecting head 5, and then while pushing the filter element 2 upward to make the connecting seat 4 move upward, and while pushing the lower end of the filter element 2 towards the inside of the machine compartment 1. Thus, the connecting head 5 switches back from the second state to the first state, and the filter element 2 is kept under the pressing force at the lower end of the connecting head 5. In this way, on the one hand, the filter element 2 can be limited in the machine compartment 1, and on the other hand, the tight connection between the connecting head 5 and the filter element 2 can be ensured, replacing the traditional way of stuffing soft pads and improving the sealing performance.

[0025] Compared with the prior art, a multi-stage filtration tabletop water purifier proposed in an embodiment of the present invention is provided with a rotatable and movable connector 5, and the connector 5 can be switched between a first state and a second state, thereby facilitating the disassembly and installation of the filter element 2. Moreover, when the filter element 2 is installed at the lower end of the connector 5 in the first state of the connector 5, it is kept under a pressing force. Thus, on the one hand, the filter element 2 can be kept limited in the machine chamber 1, and on the other hand, the tight connection between the connector 5 and the filter element 2 can be ensured, replacing the traditional method of stuffing soft pads and improving the sealing performance.

[0026] As a preferred technical solution of this embodiment, an activity groove 6 is provided on the inner wall of the machine chamber 1, a slider 7 is arranged to move up and down in the activity groove 6, an elastic member 8 is arranged at the upper end of the slider 7, and the connecting seat 4 is connected to the slider 7. Specifically, the activity groove 6 is opened in the entity of the inner wall of the machine chamber 1, and this inner wall is arranged opposite to one side of the machine chamber 1 controlled to be opened by the side baffle 3; the elastic member 8 can preferably be a spring. The setting of the elastic member 8 keeps pushing the slider 7 downward, so that the slider 7 remains at the lowest position of the lifting stroke under the condition of no external force; when the slider 7 is at the lowest position and the connector 5 is in the first state, the distance between the lower end of the connector 5 and the inner bottom surface of the machine chamber 1 is set to be less than the extending length of the filter element 2 installed on the connector 5, thereby meeting the requirement of the pressing force received by the filter element 2 after installation.

[0027] As a preferred technical solution of this embodiment, the slider 7 is provided with a convex portion 9 that penetrates through the inner wall of the machine chamber 1 movably, and the convex portion 9 is connected to the connecting seat 4 through a fastener 26. Specifically, the convex portion 9 extends vertically, preferably two, symmetrically arranged, with screw holes opened thereon, and the connecting seat 4 is provided with connecting holes corresponding to the screw holes for passing through the fastener 26, and then the fastener 26 is threadedly connected and fastened to the screw holes to realize the installation connection between the connecting seat 4 and the slider 7; the connector 5 does not block the connecting holes at any angle.

[0028] In the prior art, the connection between the connector 5 and the filter element 2 needs to be sealed. In the traditional method, a rubber sealing ring is arranged at the connection position of the two. However, during the installation process of the filter element 2, the sealing ring increases the installation resistance, and in the long-term practical use, the repeated extrusion and friction of the sealing ring will reduce the sealing effect. For this reason, the following embodiments are proposed to solve this problem.

[0029] In another embodiment proposed by the present invention, a groove 10 for inserting the filter element 2 is provided at the lower end of the connector 5. An annular groove 11 is provided on the inner wall of the groove 10, and an elastic sealing ring 12 is provided in the annular groove 11. A sealing groove 13 matching the elastic sealing ring 12 is provided at the upper end of the filter element 2. A clamping assembly is provided on the side wall of the connector 5. The clamping assembly controls the inner diameter of the elastic sealing ring 12 to decrease when the connector 5 is in the second state. Specifically, a protruding insertion part is provided at the upper end of the filter element 2, and the outer diameter of the insertion part matches the inner diameter of the groove 10; the inner diameter of the annular groove 11 is larger than the inner diameter of the groove 10; the inner diameter of the elastic sealing ring 12 can be adjusted, and the maximum value of the adjustment range matches the outer diameter of the insertion part; the sealing groove 13 is also annular. When the insertion part is correctly inserted into the groove 10, the sealing groove 13 is flush with the annular groove 11. The minimum value of the adjustable inner diameter range of the elastic sealing ring 12 matches the inner diameter of the sealing groove 13; the clamping assembly is trigger-type. When the connector 5 is in the second state, the inner diameter of the elastic sealing ring 12 is decreased to match the inner diameter of the sealing groove 13. When the connector 5 leaves the second state, the elastic sealing ring 12 expands its inner diameter under its own elasticity.

[0030] As a preferred technical solution of this embodiment, the clamping assembly includes a clamping member 14 movably disposed within a connector 5. An elastic sealing ring 12 is provided with a break point, and on both outer sides of the two ends formed at the break point, there are extrusion portions 15 that are in wedge-shaped cooperation with the clamping member 14. One end of the clamping member 14 away from the elastic sealing ring 12 is provided with an abutting portion 16 that slidably penetrates through the outer wall of the connector 5. Specifically, on the inner wall of the concave ring groove 11, there is a chute extending towards the outer side of the connector 5 and close to the direction of the connection base 4. The clamping member 14 is movably disposed within the chute. On the side of the clamping member 14 close to the elastic sealing ring 12, there is a V-shaped groove, and the end of the extrusion portion 15 is kept disposed within the V-shaped groove; the break point on the elastic sealing ring 12 enables the two ends of the break point to remain separated by its own elastic force under the condition of no external force, and the inner diameter of the elastic sealing ring 12 itself thus expands. When the clamping member 14 approaches the center of the elastic sealing ring 12 to squeeze the two extrusion portions 15, the two ends of the break point of the elastic sealing ring 12 approach each other, that is, the inner diameter of the elastic sealing ring 12 itself shrinks. And when the two ends of the break point of the elastic sealing ring 12 abut against each other, the inner diameter of the elastic sealing ring 12 is reduced to the minimum and matches the inner diameter of the sealing groove 13; in addition, when the inner diameter of the elastic sealing ring 12 is reduced to the minimum, its outer diameter is still greater than the inner diameter of the groove 10, thereby keeping itself in transition between the concave ring groove 11 and the sealing groove 13 to achieve the sealing effect of the partition; when the connector 5 is in the second state, the abutting portion 16 abuts against the outer wall of the connection base 4, thereby causing the clamping member 14 to approach the center of the elastic sealing ring 12. On the contrary, when the abutting portion 16 is not externally pushed, the elastic sealing ring 12 separates the two extrusion portions 15 by its own elastic force, and the extrusion portion 15 causes the clamping member 14 to move away from the center of the elastic sealing ring 12 through the wedge-shaped extrusion action, that is, the clamping member 14 drives the abutting portion 16 to extend more length outside the connector 5. In the use of this technical solution, when the connector 5 is in the second state, the elastic sealing ring 12 automatically maintains the state with the maximum inner diameter, and the abutting portion 16 extends the longest outside the outer wall of the connector 5. Then, the filter element 2 can be conveniently unplugged or plugged onto the connector 5. When the filter element 2 is plugged onto the connector 5, the connector 5 is switched from the second state to the first state, that is, the connector 5 drives the abutting portion 16 to approach the surface of the connection base 4. When the connector 5 approaches the first state, the abutting portion 16 abuts against the surface of the connection base 4, and the abutting portion 16 then passively pushes the clamping member 14 towards the center of the elastic sealing ring 12. At this time, the clamping member 14 forces the two extrusion portions 15 to approach each other to reduce the inner diameter of the elastic sealing ring 12. Thus, the sealing effect and the fixing effect of the elastic sealing ring 12 are achieved.

[0031] In another embodiment proposed by the present invention, a bushing 17 is provided on the connection base 4, and a shaft tube 18 rotatably connected to the bushing 17 is provided on the connector 5. Specifically, both ends of the shaft tube 18 respectively correspond to the inlet and outlet ends of the internal water flow channel of the connector 5; the axis of the shaft tube 18 is arranged parallel to the connection base 4.

[0032] As a preferred technical solution of this embodiment, a conduit 19 is inserted into the shaft tube 18, and each conduit 19 is arranged in the filter pipeline. Specifically, the shaft sleeve 17 is sleeved outside the shaft tube 18 without affecting the connection between the shaft tube 18 and the conduit 19; the end of the conduit 19 is rotatably inserted into the shaft tube 18.

[0033] As a preferred technical solution of this embodiment, a hollow groove 20 for the conduit 19 to pass through is arranged in the machine chamber 1. A pressing member 21 is movably arranged on one side of the hollow groove 20. The pressing member 21 and the slider 7 are linked by a linkage assembly. When the slider 7 is at the lowest position of the moving stroke in the moving groove 6, the pressing member 21 remains extended into the hollow groove 20 to press the conduit 19. Specifically, the hollow groove 20 is arranged vertically, and its inner diameter matches the outer diameter of the conduit 19; a slot for the pressing member 21 to move is arranged on the inner wall of the hollow groove 20; the pressing member 21 is in a sheet shape; the pipe wall of the conduit 19 is elastically arranged, that is, the conduit 19 can be deformed and clamped by external pressure to stop conduction, and after the external pressure is released, the conduit 19 elastically restores the conduction ability; the linkage between the pressing member 21 and the slider 7 realizes that when the slider 7 is at the lowest position of the moving stroke in the moving groove 6, the pressing member 21 presses the conduit 19, that is, when the filter element 2 is not installed on the connector 5, the conduit 19 stops conduction. Thus, it can be avoided that during the replacement process of the filter element 2, the connector 5 leaks liquid and causes pollution.

[0034] As a preferred technical solution of this embodiment, the linkage assembly includes a sliding member 22 fixedly connected to the pressing member 21. A sliding groove 23 matching the sliding member 22 is arranged in the machine chamber 1. A ramp 24 is fixedly arranged on the sliding member 22. A pressing block 25 in wedge-shaped fit with the ramp 24 is fixedly arranged at the lower end of the slider 7. Specifically, usually two conduits 19 are respectively connected to both sides of the same connector 5, and a pair of corresponding pressing members 21 are arranged. The sliding member 22 can connect the pair of pressing members 21 together; the sliding member 22 slides horizontally in the sliding groove 23 and is perpendicular to the extending direction of the conduit 19; the inclined surface of the ramp 24 is arranged on the side away from the conduit 19. Thus, when the slider 7 drives the pressing block 25 to descend, under the wedge-shaped extrusion of the pressing block 25 and the ramp 24, the sliding member 22 drives the pressing member 21 to approach the conduit 19. In the actual use of this technical solution, when the filter element 2 is removed from the connector 5 and the connector 5 is not affected by external force, the connecting seat 4 automatically descends to the lowest position. Correspondingly, the slider 7 descends to the lowest position under the action of the elastic member 8. The slider 7 drives the pressing block 25 to descend, so that the pressing block 25 and the ramp 24 are wedge-shaped extruded and pushed, that is, the pressing block 25 drives the pressing member 21 to press the conduit 19 through the sliding member 22, realizing the open circuit and stop conduction of the conduit 19; after the filter element 2 is installed, the connecting seat 4 rises a certain height, so that the slider 7 drives the pressing block 25 to rise a certain height, and the pressing block 25 does not press the ramp 24, then the conduit 19 expands under its own elastic force to conduct again.

[0035] Only certain exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-stage filtering desktop water purifier, comprising a machine compartment (1) and a filter element (2) installed inside the machine compartment (1), a detachable side stop (3) being provided on one side of the machine compartment (1), characterized in that: Also includes: A connecting seat (4) which is elastically and movably connected in the machine compartment (1); The connecting head (5) is hinged on the connecting seat (4), and has a first state in which it is arranged vertically and a second state in which the lower end is tilted and swung outward after the side block (3) is disassembled during the rotation stroke. In the first state of the connecting head (5), the filter element (2) is connected to the lower end of the connecting head (5) and is subjected to a pressing force to be limited in position in the machine compartment (1). In the second state of the connecting head (5), the filter element (2) is movably and detachably connected to the connecting head (5).

2. The multi-stage filtering desktop water purifier according to claim 1, characterized in that: A movable groove (6) is provided on the inner wall of the machine chamber (1), a sliding block (7) is provided in the movable groove (6) for lifting and lowering movement, an elastic member (8) is provided at the upper end of the sliding block (7), and the connecting seat (4) is connected to the sliding block (7).

3. The multi-stage filtering desktop water purifier according to claim 2, characterized in that: The slider (7) is provided with a raised portion (9) that movably penetrates the inner wall of the cabin (1); the raised portion (9) is connected to the connecting seat (4) via a fastener (26).

4. The multi-stage filtering desktop water purifier according to claim 1, characterized in that: The lower end of the connector (5) is provided with a groove (10) for plugging the filter element (2), the inner wall of the groove (10) is provided with a concave ring groove (11), an elastic sealing ring (12) is provided in the concave ring groove (11), the upper end of the filter element (2) is provided with a sealing groove (13) matching the elastic sealing ring (12), and the side wall of the connector (5) is provided with a clamping assembly, which controls the elastic sealing ring (12) to reduce its inner diameter when the connector (5) is in the second state.

5. The multi-stage filtering desktop water purifier according to claim 4, characterized in that: The clamping assembly comprises a clamping member (14) movably arranged in the connecting head (5), the elastic sealing ring (12) is provided with a breakpoint, and the outer sides of the two ends formed at the breakpoint are provided with extrusion portions (15) that are wedge-matched with the clamping member (14), and the end of the clamping member (14) away from the elastic sealing ring (12) is provided with an abutment portion (16) that slides through the outer side wall of the connecting head (5).

6. The multi-stage filtering desktop water purifier according to claim 2, characterized in that: The connecting seat (4) is provided with a shaft sleeve (17), and the connecting head (5) is provided with a shaft tube (18) rotatably connected to the shaft sleeve (17).

7. The multi-stage filtering desktop water purifier according to claim 6, characterized in that: The shaft tube (18) is plugged with a conduit (19), and each conduit (19) is connected to a filter pipeline.

8. The multi-stage filtering tabletop water purifier according to claim 7, characterized in that: The cabin (1) is provided with a hollow groove (20) for the conduit (19) to pass through, and an extrusion piece (21) is movably provided on one side of the hollow groove (20). The extrusion piece (21) is linked with the slider (7) via a linkage assembly, and when the slider (7) is at the lowest position of the movable stroke in the movable groove (6), the extrusion piece (21) remains extended into the hollow groove (20) to compress the conduit (19).

9. The multi-stage filtering tabletop water purifier according to claim 8, characterized in that: The linkage assembly comprises a sliding member (22) fixedly connected to an extrusion member (21); a sliding groove (23) matching the sliding member (22) is provided in the machine compartment (1); a slope body (24) fixedly provided on the sliding member (22); and a pressing block (25) wedge-shapedly matched with the slope body (24) is fixedly provided at the lower end of the sliding block (7).

10. The multi-stage filtering tabletop water purifier according to claim 8, characterized in that: The tube wall of the conduit (19) is elastically configured.

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