Filter core connecting and mounting structure and pure water machine thereof

Abstract

The present application relates to a filter core connecting and installing structure, which comprises a connecting seat and a rotating seat located in the cavity of the connecting seat and capable of rotating horizontally relative to the connecting seat, wherein the upper end of the cavity is capable of inserting the lower end of the filter core, the upper surface of the rotating seat is provided with a plurality of connecting columns which are equal in number to the interfaces of the filter core and capable of being inserted into the corresponding interfaces of the filter core, each connecting column is provided with an axial channel, and a plurality of radial channels which are equal in number to the interfaces of the filter core and connected with the axial channels on the corresponding connecting columns are also provided on the rotating seat, the connecting seat is provided with water flow channels corresponding to the radial channels, the inner end surface of each water flow channel is provided with a first sealing ring in contact with the peripheral surface of the rotating seat, and when the rotating seat rotates relative to the connecting seat, the radial channels on the rotating seat are connected with or dislocated from the corresponding water flow channels on the connecting seat. Meanwhile, a pure water machine with the filter core connecting and installing structure is also disclosed, so that the filter core of the pure water machine is easy to install and has good sealing performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pure water machines, in particular, to a pure water machine with a filter element connecting and mounting structure, and more particularly to a filter element connecting and mounting structure of a pure water machine. BACKGROUND

[0002] With the improvement of living standards, people's requirements for drinking water are also constantly improving. At present, in order to obtain sanitary and healthy drinking water, people have generally used pure water machines to filter impurities and microorganisms in tap water. Therefore, pure water machines have emerged as the times require.

[0003] Among many pure water machines, compact, small, and beautiful pure water machines have always been loved by people. For this reason, manufacturers have begun to develop high-composite and high-integrated composite filter elements, allowing users to obtain the above-mentioned small pure water machines without sacrificing product quality.

[0004] However, due to the high composite of the filter element, even the composite of the front and rear filter elements, the diameter and volume of such a composite filter element will be larger, and the number of water inlet and outlet ports of the filter element will also increase, and the number and size of the required sealing rings will also increase accordingly.

[0005] When the existing filter element is installed, the filter element is first placed in the filter element barrel, and then the filter element barrel is positioned on the filter element seat. The connection and sealing method of the filter element barrel and the filter element seat is not more than two: one is a joint outer circle radial seal, and one or two O-rings are required for each water inlet and outlet port. Then, the filter element barrel and the filter element are rotated, and are fixed by a locking buckle or directly inserted into an elastic locking buckle. The other is a face seal ring seal, and one sealing ring is used for each water inlet and outlet port. After rotating the filter element barrel and the filter element, the locking buckle is used for fixation. Obviously, when the first sealing method is used, the number of O-rings is large, the size is large, the friction is large during screwing, and the installation is difficult. When the second sealing method is used, the number of sealing rings is relatively small, and the size is small, but the locking force required for planar sealing is large, the friction generated during screwing is relatively small than the former, but the planar pressure capacity is poor and not easy to seal and pressure.

[0006] At present, people have also designed a rotating water-stopping filter element device, such as the structure disclosed in the document with the Chinese patent authorization announcement number CN210214839U. In the device, a rotating seat is added to the filter element barrel relative to its rotation. The relative positions of the filter element barrel, the filter element, and the central water collecting pipe do not change. The rotating seat rotates relative to the filter element barrel, so that each water passage is in a connected state or a blocked state. By using such a structure, the filter element can be disassembled without leaking water.

[0007] However, since the rotating seat in this document has an axial water passage, and the sealing ring (the sealing ring indicated by number 15 in the figure) is still an end face seal, it still has the defects of poor planar pressure bearing capacity and difficulty in sealing pressure.

[0008] Therefore, further improvements are needed. Summary of the Invention

[0009] The first technical problem to be solved by the present invention is to provide a filter element connection and installation structure that is easy to install and has good sealing performance, in light of the current state of the prior art.

[0010] The second technical problem to be solved by the present invention is to provide a water purifier with the above-mentioned filter element connection and installation structure, so that the filter element of the water purifier is easy to install and has good sealing performance, in view of the current status of the prior art.

[0011] The technical solution adopted by the present invention to solve the first technical problem mentioned above is as follows: a filter element connection and installation structure, including a connecting seat with a cavity and a rotating seat located in the cavity of the connecting seat and capable of rotating horizontally relative to the connecting seat. The upper port of the cavity of the connecting seat can be used to insert the lower end of the filter element. The upper surface of the rotating seat is provided with a plurality of connecting posts, which are the same number as the interfaces of the filter element and can be inserted into the corresponding interfaces of the filter element. An axial channel is opened in each connecting post. The rotating seat is characterized in that: the rotating seat is also provided with a plurality of radial channels, which are the same number as the interfaces of the filter element and are connected to the axial channels on the corresponding connecting posts. The connecting seat is provided with water flow channels corresponding to each radial channel. The inner end face of each water flow channel is provided with a first sealing ring that contacts and fits with the circumferential surface of the rotating seat. When the rotating seat rotates relative to the connecting seat, the radial channels on the rotating seat are connected to or misaligned with the corresponding water flow channels on the connecting seat.

[0012] In the above scheme, a further improvement is made to each of the water flow channels, which consists of a radial water flow channel and an axial water flow channel. A core with a radial through-hole and a spring acting on one end of the core are installed in the radial water flow channel. The spring ensures that the core always tends to move radially inward and protrude outward from the radial water flow channel. The through-hole on the core becomes part of the water flow channel, and the first sealing ring is located on the inner end face of the core. This makes the installation of the filter element easier.

[0013] To facilitate processing and assembly, each of the radial water flow channels is also equipped with a plug that abuts against the other end of the spring.

[0014] To prevent leakage between the core and the radial water flow channel, it is preferable that a second sealing ring is installed on the contact surface between the core and the corresponding radial water flow channel.

[0015] In the above solutions, there are four connecting columns, and correspondingly, there are also four radial channels and four water flow channels to accommodate the installation of the composite filter element.

[0016] In the above solutions, in order to conveniently constrain the rotating seat within the connecting seat, it is preferable that the inner wall of the connecting seat is provided with an upper shoulder that abuts against the upper surface of the rotating seat, and the connecting seat is also detachably connected to a bottom cover located below the rotating seat that can constrain the rotating seat within the connecting seat.

[0017] In order to facilitate quick assembly with the filter element, a practical feature is that the inner wall of the cavity upper port of the connecting seat is also provided with a positioning rib extending circumferentially to engage with the locking buckle on the filter element.

[0018] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a pure water machine, including a filter element and a filter element connection and installation structure for installing the filter element, characterized in that: the filter element connection and installation structure adopts the above-mentioned filter element connection and installation structure.

[0019] Compared with existing technologies, this invention adds a radial channel to the rotating base and a corresponding water flow channel to the connecting base, allowing the first sealing ring to fit and seal with the circumferential surface of the rotating base. This sealing method of the outer circumferential surface of the radial channel absorbs the advantages of both radial sealing and end-face sealing in existing technologies, resulting in easy sealing, low friction during filter element installation, and easy installation. Especially when the first sealing ring is installed on the inner end face of the core, with the radial channel and the corresponding water flow channel in communication, both ends of the core are under water pressure, so the first sealing ring does not need to bear water pressure. Furthermore, the small diameter of the first sealing ring results in low pressure, making filter element replacement easy even without depressurization. Therefore, this invention achieves unexpected technical effects with a simple structure, resulting in a long service life and good sealing performance of the first sealing ring, while facilitating filter element replacement. This significantly improves the user experience of the water purifier, thus promoting the widespread adoption of this type of water purifier and making it more suitable for use in water purifiers with composite filter elements. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention with a filter element installed;

[0021] Figure 2 for Figure 1 A partial 3D schematic diagram of the resetting filter element;

[0022] Figure 3 for Figure 1 A cross-sectional view;

[0023] Figure 4 for Figure 1A 3D diagram of the interior after the filter element has been removed;

[0024] Figure 5 for Figure 4 A cross-sectional view;

[0025] Figure 6 for Figure 5 A cross-sectional view along line AA (on state);

[0026] Figure 7 for Figure 6 A schematic diagram of the structure after the rotating seat rotates relative to the connecting seat (misaligned state);

[0027] Figure 8 for Figure 4 A three-dimensional diagram from another direction;

[0028] Figure 9 This is a three-dimensional schematic diagram of the rotating seat in the embodiment of the invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0031] The filter cartridge connection and installation structure of this invention is applied to a water purifier for installing filter cartridges. The filter cartridge can be a single filter cartridge as in the prior art, or it can be a composite filter cartridge. In this embodiment, the filter cartridge connection and installation structure will be described below using a composite filter cartridge as an example.

[0032] like Figures 1 to 3The diagram shows a composite filter element 10 inserted into the filter element connection and mounting structure 20. The top of the composite filter element has a handle 30 for user support. The lower end of the composite filter element 10 has a reduced diameter, forming a plug-in end 101, which can be inserted into the upper port of the connecting seat 1 described below. To secure it to the connecting seat 1, a locking buckle 102 is designed on the outer peripheral wall of the plug-in end 101. This locking buckle 102 is designed as a block extending circumferentially, but it can also be designed as other structures in the prior art. Since the locking buckle 102, the composite filter element 10, and the handle 30 are all prior art, they will not be described in detail here.

[0033] The filter element connection and installation structure 20 described above mainly includes a connecting seat 1 and a rotating seat 2. Please refer to [link / reference]. Figures 4 to 9 The connecting seat 1 has a cavity 11, which can be arranged to extend vertically through the connecting seat 1 or only through the upper surface of the connecting seat 1. In the figure, the cavity 11 is arranged in the former manner, and the lower port is covered by the bottom cover 3 described below. The upper port of the cavity 11 of the connecting seat 1 allows the insertion end 101 of the composite filter element 10 to be inserted, and corresponds to the locking buckle 102 on the reset filter element 10. A circumferentially extending positioning rib 12 is also provided on the inner wall of the upper port of the cavity of the connecting seat 1. The positioning rib 12 is designed in a horizontal L-shape, forming a sliding groove with the inner wall of the cavity 11 for the locking buckle 102 to mate with. When the lower end of the reset filter element 10 is inserted into the upper port of the cavity 11, it is pressed... Figure 4 Rotate the arrow direction by an angle to allow the locking buckle 102 on the composite filter element 10 to slide into the groove in the direction of the arrow, and allow the positioning rib 12 to engage with the locking buckle on the composite filter element 10 to prevent the composite filter element 10 from axially disengaging from the connecting seat 1. Therefore, the connection method is also the prior art, and will not be described in detail here.

[0034] The aforementioned rotating seat 2 is situated within the cavity 11 of the connecting seat 1 and can rotate horizontally relative to the connecting seat 1. The structure by which the rotating seat 2 is constrained to rotate within the connecting seat 1 can take various forms. In this embodiment, specifically, the inner wall of the connecting seat 1 is provided with an upper shoulder 13 that abuts against the upper surface of the rotating seat 2. A bottom cover 3 located below the rotating seat is also detachably connected to the connecting seat 1. This bottom cover 3 can be fixed to the bottom of the connecting seat 1 with screws. Please refer to [link to relevant documentation]. Figure 5 and Figure 8 Thus, when the rotating seat 2 is inserted into the cavity 11 of the connecting seat 1 from bottom to top, its upper surface abuts against the upper shoulder 13 to restrict the axial upward movement of the rotating seat 2. Then, the bottom cover 3 is used to cover the lower port of the cavity 11 of the connecting seat 1 to restrict the axial downward movement of the rotating seat 2. Obviously, in this embodiment, a simple structure is used to constrain the rotating seat 2 within the cavity 11 of the connecting seat 1, allowing it to rotate horizontally relative to the connecting seat 1 as needed.

[0035] To achieve communication with the interfaces 103 in the composite filter element 10, the upper surface of the rotating base 2 is provided with multiple connecting posts 21, the same number as the interfaces 103 of the composite filter element 10, which can be inserted into the corresponding interfaces of the composite filter element 10. As shown in the figure, the composite filter element has four interfaces 103. Therefore, four connecting posts 21 extend from the upper surface of the rotating base 2. An axial channel 22 is formed within each connecting post 21. Simultaneously, the rotating base 2 also has four radial channels 23, the same number as the interfaces of the composite filter element, which communicate with the axial channels 22 on the corresponding connecting posts 21. The ports of each radial channel 23 are located on the circumference of the rotating base 2. Please refer to [reference needed]. Figure 9 Correspondingly, the connecting seat 1 has water flow channels 14 corresponding to each radial channel. In this embodiment, each water flow channel 14 consists of a radial water flow channel 141 and an axial water flow channel 142. Please refer to [link to relevant documentation]. Figure 3 and Figure 5 The upper end of the axial water flow channel 142 is connected to the radial water flow channel 141, and the lower end is used to connect to the internal water circuit of the water purifier so that the purified water filtered by the composite filter element and the generated heavy water flow out of the water purifier. Meanwhile, a core 4 with a radial through hole 41 and a spring 5 acting on one end of the core 4 are installed in each radial water flow channel 141. The other end of the spring 5 abuts against a plug 6, which is also positioned in the radial water flow channel 141. For easy positioning, the plug 6 is threaded into the outer port of the radial water flow channel 141. Rotating the plug 6 adjusts the preload of the spring 5. The preload of the spring ensures that the core 4 always tends to move radially inward and protrude from the inner port of the radial water flow channel 141. The through hole 41 on the core 4 becomes part of the water flow channel 14, and a first sealing ring 7 is provided on the inner end face of the core 4 to contact and cooperate with the outer circumferential surface of the rotating seat 2. When the connecting post 21 on the rotating seat 2 is inserted into the corresponding interface of the composite filter element 10, the rotating seat 2 rotates horizontally relative to the connecting seat 1 as the composite filter element 10 rotates. When the locking buckle 102 on the composite filter element 10 rotates to abut against the vertical part on the positioning rib 12, the radial channel 23 on the rotating seat 2 connects with the corresponding water flow channel 14 on the connecting seat 1 (see [link]). Figure 6 At this time, since both ends of the core 4 are under water pressure, the first sealing ring 7 does not need to bear water pressure. Furthermore, the diameter of the first sealing ring 7 is small, resulting in low pressure. Even without depressurization, rotating the composite filter element 10 and the rotating seat 2 is easy. When it is necessary to replace or maintain the composite filter element, simply rotate the composite filter element 10 and the rotating seat 2 in the opposite direction, causing the locking buckle 102 on the composite filter element 10 to completely disengage from the positioning rib 12. At this time, the radial channel 23 on the rotating seat 2 is misaligned with the corresponding water flow channel 14 on the connecting seat 1 (see [link to relevant documentation]). Figure 7In this state, the composite filter element 10 can be lifted upwards, detaching it from the connecting seat 1 and the rotating seat 2. Since each interface of the composite filter element 10 is equipped with a stop valve 40 (one-way valve), it has a built-in anti-drip structure, preventing water from falling out. Water in the axial channel 22 and radial channel 23 within the rotating seat 2 may flow into the gap between the rotating seat 2 and the connecting seat 1 in small amounts, but because the gap is very small, it will evaporate naturally. Water in the radial water flow channel 141, axial water flow channel 142, and the water path inside the water purifier is effectively prevented from leaking due to the sealing fit between the first sealing ring 7 and the peripheral wall of the rotating seat 2. Furthermore, during rotation, the low pressure and friction of each first sealing ring make rotating the composite filter element 10 and the rotating seat 2 easy and convenient.

[0036] During the rotation of the rotating seat 2, the core 4 can move appropriately within the radial water flow channel 141 under the action of the spring 5. To prevent leakage between the core 4 and the radial water flow channel 141 during this movement, a second sealing ring 8 is installed on the contact surface between the core 4 and the corresponding radial water flow channel 141. In the figure, the second sealing ring 8 is installed on the outer circumferential surface of the core 4. Alternatively, it can be installed on the inner wall of the radial water flow channel 141 as needed. Similarly, to prevent leakage between the plug 6 and the radial water flow channel 141, a third sealing ring 9 is provided on the plug 6 to mate with the inner wall of the radial water flow channel 141.

[0037] In addition to the water flow channels involved in the above embodiments, the water flow channels can also be designed in a radially distributed form, omitting the core, spring, and plug, so that the outer port of the radial channel is directly connected to the internal water circuit of the water purifier, and the first sealing ring is directly installed on the inner end face of the water flow channel, so that it contacts and cooperates with the circumferential surface of the rotating seat. Although this implementation method has slightly increased friction when rotating the composite filter element compared to the structure where the first sealing ring is set on the core, it can still achieve the purpose of easy filter element installation and good sealing performance compared to the prior art. Therefore, such a solution is also within the protection scope of this invention.

Claims

1. A filter element connection and installation structure, comprising a connecting seat (1) having a cavity (11) and a rotating seat (2) situated in the cavity of the connecting seat and capable of horizontally rotating relative to the connecting seat, wherein the upper port of the cavity of the connecting seat (1) is capable of allowing the lower end of the filter element to be inserted, and the upper surface of the rotating seat (2) is provided with a plurality of connecting posts (21) having the same number as the number of interfaces of the filter element and capable of being inserted into the corresponding interfaces of the filter element, wherein an axial channel (22) is formed in each connecting post, and the rotating seat (2) is also provided with a plurality of radial channels (23) having the same number as the number of interfaces of the filter element and communicating with the axial channels on the corresponding connecting posts, and the connecting seat (1) is provided with water flow channels (14) corresponding to each radial channel, wherein the inner end face of each water flow channel is provided with a first sealing ring (7) that contacts and cooperates with the circumferential surface of the rotating seat (2), characterized in that: When the rotating seat (2) rotates relative to the connecting seat (1), the radial channel (23) on the rotating seat (2) is connected to or misaligned with the corresponding water flow channel on the connecting seat (1); and each of the water flow channels (14) is composed of a radial water flow channel (141) and an axial water flow channel (142). A core (4) with a radial through hole (41) and a spring (5) acting on the core are installed in the radial water flow channel (141). The spring enables the core to always have the tendency to move radially inward and be exposed at the inner port of the radial water flow channel. The through hole (41) on the core (4) becomes part of the water flow channel (14). The first sealing ring (7) is located on the inner end face of the core (4). Furthermore, each of the radial water flow channels (141) is also equipped with a plug (6) that abuts against the other end of the spring (5), and the plug (6) is threadedly connected to the outer port of the radial water flow channel (141).

2. The filter element connection and installation structure according to claim 1, characterized in that: A second sealing ring (8) is installed on the contact surface between the core (4) and the corresponding radial water flow channel (141).

3. The filter element connection and installation structure according to any one of claims 1 to 2, characterized in that: There are four connecting columns (21), and correspondingly, there are also four radial channels and four water flow channels (14).

4. The filter element connection and installation structure according to any one of claims 1 to 2, characterized in that: The inner wall of the connecting seat (1) is provided with an upper shoulder (13) that abuts against the upper surface of the rotating seat (2). The connecting seat (1) is also detachably connected with a bottom cover (3) located below the rotating seat (2) that can constrain the rotating seat (2) within the connecting seat (1).

5. The filter element connection and installation structure according to any one of claims 1 to 2, characterized in that: The inner wall of the cavity upper port of the connecting seat (1) is also provided with a positioning rib (12) extending circumferentially to cooperate with the locking buckle on the filter element.

6. A water purifier, comprising a filter element and a filter element connection and mounting structure for installing the filter element, characterized in that: The filter element connection and installation structure adopts the filter element connection and installation structure as described in any one of claims 1 to 5.

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