A magnetic filter assembly for a flushing device

Abstract

This utility model relates to the field of flushing device technology, and more particularly to a magnetic filter assembly for a flushing device. It includes a filter body, a filter section installed within the filter body via a detachable structure, and a permanent magnet encapsulated within the filter body. A Hall sensor is installed near the water inlet of the flushing device's main unit. The Hall sensor is electrically connected to the flushing device's control circuit board. The filter body has an opening communicating with the water inlet of the flushing device's main unit. An mounting collar is provided around the filter body, allowing it to rotate around the water inlet axis. When the filter body rotates, the Hall sensor detects changes in the magnetic field near the permanent magnet and sends a signal to the control circuit board. The control circuit board then adjusts the driving force of the flushing device's pump or valve. This utility model integrates the power adjustment mechanism into the filter screen, eliminating the need for additional openings or mechanical knobs in the main unit, improving waterproof reliability. Continuous magnetic field changes are obtained by rotating the filter screen, and the linear Hall sensor enables precise power control.

Description

Technical Field

[0001] This utility model relates to the field of flushing device technology, and in particular to a magnetic filter assembly for flushing devices. Background Technology

[0002] Existing portable flushers typically have a simple filter at the water inlet to trap impurities; when adjusting the water pump power or valve opening is required, control components such as buttons, multi-position dials, or slider potentiometers are usually installed on the main unit. This type of solution has the following problems:

[0003] 1. The main unit has a complex structure and many openings, which affects its reliability and waterproofness;

[0004] 2. The speed control mechanism is strongly coupled to the main unit, making it difficult to reuse it across different configuration models;

[0005] 3. Each user's perception of water pressure varies greatly. Traditional multi-level operation is complicated to operate. At the same time, portable flushers need to be used in an IPX7 environment. The main unit needs to be rinsed and cleaned almost every time it is used. At this time, waterproofing and stepless pressure regulation become very important.

[0006] Therefore, there is an urgent need for a universal solution that can filter power without altering the appearance and structure of the host unit and achieve stepless power regulation. Utility Model Content

[0007] To overcome the problem that existing flushers cannot achieve stepless power adjustment without changing the appearance and structure of the main unit.

[0008] The technical solution of this utility model is as follows: a magnetic filter assembly for a flushing device, comprising a filter body, a filter section installed in the filter body via a detachable structure, and a permanent magnet encapsulated in the filter body. The main body of the flushing device is equipped with a Hall sensor near the water inlet. The Hall sensor is electrically connected to the control circuit board of the flushing device. The filter body is provided with an opening communicating with the water inlet of the main body of the flushing device. An mounting collar is provided around the filter body. The filter body can rotate around the axis of the water inlet. When the filter body rotates (the position of the permanent magnet relative to the Hall sensor changes with the rotation of the filter body, so that the main body of the flushing device can read different magnetic field strengths), the Hall sensor is used to detect the change in magnetic field near the permanent magnet and send a signal to the control circuit board. The control circuit board is used to regulate the driving amount of the water pump or valve of the flushing device.

[0009] Preferably, the mounting ring has a washer inside, and a snap-fit ​​connector is integrally fixedly connected to the mounting ring. The mounting ring is fastened to the main unit's water inlet via the snap-fit ​​connector. A rotating table is mounted on the filter body, and the filter body is rotatably connected to the mounting ring via the rotating table.

[0010] Preferably, the filter body includes a filter cavity, an mounting cavity and a lever mounted on the filter cavity. The lever protrudes outward on the outer edge of the filter cavity. A permanent magnet is mounted inside the filter cavity. A pointer is provided on the lever. The pointer is used for manual identification of the rotation position and does not participate in the electronic control function.

[0011] Preferably, the mounting cavity includes an eccentric mounting cavity fixedly connected to one eccentric side of the filter cavity, the eccentric mounting cavity is disposed on one side of the lever, the permanent magnet includes a strip-shaped neodymium iron boron magnet, the strip-shaped neodymium iron boron magnet is encapsulated in the eccentric mounting cavity, and the Hall sensor is located on the rotation path of the strip-shaped neodymium iron boron magnet.

[0012] Preferably, the mounting cavity further includes an annular mounting cavity concentrically fixed to the filter cavity, the annular mounting cavity being disposed on the opposite side of the lever, the permanent magnet further includes a multi-pole annular magnet, the multi-pole annular magnet being encapsulated in the annular mounting cavity, and the Hall sensor being located on the rotation path of the multi-pole annular magnet.

[0013] Preferably, the filter section is a metal mesh or a microporous array plate.

[0014] Preferably, the filter body is made of silicone rubber, and the detachable structure includes an interlocking groove formed in the filter body, and the filter part is squeezed and fitted into the interlocking groove.

[0015] Preferably, the detachable structure includes a pressing groove formed in the filter body, an annular pressing block that is interference-fitted into the pressing groove, and a number of recessed handles arranged in a circumferential array on the inner wall of the pressing block, and the filter part is pressed into the pressing groove by the pressing block.

[0016] Preferably, a limiting structure is installed on the mounting collar, and the limiting structure and the rotation path of the lever are on the same horizontal plane, with the rotation angle of the lever being 0° to 180°.

[0017] Preferably, a ratchet ring is provided on the outer wall of the filter body, and a pawl is installed on the mounting collar at the same horizontal plane as the ratchet ring. One end of the pawl is movably connected to the mounting collar, and a torsion spring is provided at the movable connection. The other end of the pawl is attached to the ratchet ring for reverse limiting.

[0018] The beneficial effects of this utility model are:

[0019] 1. The power adjustment mechanism is integrated into the filter screen, eliminating the need for additional openings or mechanical knobs in the main unit, thus improving waterproof reliability. Continuous magnetic field changes can be obtained by rotating the filter screen, and linear Hall effect sensors enable precise power control.

[0020] 2. The same host unit can be equipped with either a magnetic filter with a "throttle" function or a non-magnetic filter, reducing platform-based design and inventory pressure;

[0021] 3. The filter screen has the functions of filtration, sealing, indication and control. It has fewer parts, is easy to assemble and has low cost.

[0022] 4. The raised pointer provides a comfortable grip, and the scale is intuitive;

[0023] 5. The ratchet locking structure on the filter screen effectively prevents accidental reverse activation;

[0024] 6. The interference fit formed by the snap-fit ​​connector provides a stable feel;

[0025] 7. This filter assembly does not require any changes to the main unit structure. The main unit of the flushing device only needs to reserve the position of the Hall sensor for universal use, making it highly adaptable. Attached Figure Description

[0026] Figure 1 The diagram shown is a three-dimensional structural diagram of the magnetic filter assembly for a flushing device according to the present invention, in an exploded state.

[0027] Figure 2 The diagram shown is a three-dimensional structural schematic of the overall assembly state of the magnetic filter assembly for a flushing device according to this utility model.

[0028] Figure 3 The diagram shown is another three-dimensional structural schematic of the overall assembly state of the magnetic filter assembly for a flushing device according to this utility model.

[0029] Figure 4 The diagram shown is a top view of the magnetic filter assembly for a flushing device according to this utility model.

[0030] Figure 5 The diagram shown is a bottom view of the magnetic filter assembly for a flushing device according to this utility model.

[0031] Figure 6 The diagram shown is a bottom view of another embodiment of the magnetic filter assembly for a flushing device according to the present invention.

[0032] Figure 7 The diagram shown is a schematic diagram of the first structure of the magnetic filter assembly for a flushing device according to this utility model.

[0033] Figure 8 The diagram shown is a schematic diagram of the second structure of the magnetic filter assembly for a flushing device according to this utility model.

[0034] Figure 9 The diagram shown is a side view of the filter body of the magnetic filter assembly for a flushing device according to one embodiment of the present invention.

[0035] Figure 10 The diagram shown is a top view of the filter body of the magnetic filter assembly for a flushing device according to the present invention.

[0036] Figure 11The diagram shown is a side view of the filter body of the magnetic filter assembly for a flushing device according to Embodiment 2 of this utility model.

[0037] Figure 12 The diagram shown is a top view of the filter body of the magnetic filter assembly for a flushing device according to Embodiment 2 of this utility model.

[0038] Figure 13 The diagram shown is a schematic representation of the filter section of the magnetic filter assembly for a flushing device according to Embodiment 1 of this utility model.

[0039] Figure 14 The diagram shown is a schematic representation of the filter section of the magnetic filter assembly for a flushing device according to Embodiment 2 of this utility model.

[0040] Figure 15 The diagram shown is a schematic representation of the detachable structure of the magnetic filter assembly for a flushing device according to the present invention.

[0041] Figure 16 The diagram shown is a schematic representation of the detachable structure of the magnetic filter assembly for a flushing device according to Embodiment 2 of this utility model.

[0042] Figure 17 The diagram shows the voltage change curve of the magnetic filter assembly for a flushing device of this invention when it rotates.

[0043] Explanation of reference numerals in the attached drawings: 1. Filter body; 2. Filter section; 3. Permanent magnet; 4. Hall sensor; 5. Mounting collar; 6. Washer; 7. Snap connector; 9. Pointer; 10. Limiting structure; 11. Claw; 12. Ratchet ring; 101. Filter chamber; 102. Eccentric mounting chamber; 103. Annular mounting chamber; 104. Rotary table; 105. Paddle; 201. Metal mesh; 202. Microporous array plate; 301. Strip neodymium iron boron magnet; 302. Multi-pole annular magnet; 801. Fitting groove; 802. Pressing groove; 803. Pressing block; 804. Handle. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] Please see Figures 1-12This utility model provides an embodiment: a magnetic filter assembly for a flushing device, comprising a filter body 1, a filter section 2 detachably mounted within the filter body 1, and a permanent magnet 3 encapsulated within the filter body 1. A Hall sensor 4 is installed near the water inlet of the flushing device, and the Hall sensor 4 is electrically connected to the control circuit board of the flushing device. The filter body 1 has an opening communicating with the water inlet of the flushing device. An mounting ring 5 is provided around the periphery of the filter body 1. The filter body 1 can rotate around the axis of the water inlet. When the filter body 1 rotates, the Hall sensor 4 detects the change in the magnetic field near the permanent magnet 3 and sends a signal to the control circuit board. The control circuit board is used to regulate the driving amount of the flushing device's water pump or valve. It is worth noting that the flushing device can be equipped with different types of filters (ordinary filters or the magnetic filter in this technical solution) at the factory or later to form different grades of models suitable for different market demands, without changing the main unit mold structure.

[0046] Please see Figures 1-6 The mounting ring 5 is equipped with a washer 6 (the washer 6 firstly provides an interference fit between the mounting ring 5 and the filter body 1, which improves installation stability, and also provides a seal to prevent water seepage). The mounting ring 5 is integrally fixed with a snap-fit ​​connector. The mounting ring 5 is fastened to the main unit inlet by the snap-fit ​​connector 7. The filter body 1 is equipped with a rotating table 104. The filter body 1 is rotatably connected to the mounting ring 5 through the rotating table 104 (in actual use, the snap-fit ​​connector 7 can be a damping rib or a micro-interference fit structure. A circumferential limiting step and a stop notch can also be set on the mounting ring 5 so that the mounting ring 5 will not loosen when the filter body 1 is rotated).

[0047] The filter body 1 includes a filter chamber 101, a mounting cavity and a lever 105 mounted on the filter chamber 101. The lever 105 protrudes outward on the outer edge of the filter chamber 101. The permanent magnet 3 is installed inside the filter chamber 101. A pointer 9 is provided on the lever 105. The pointer 9 is actually a scale line / marker. In addition, a reference mark is provided on the main housing to indicate the power position.

[0048] In practical applications, the mounting cavity can also be detachably connected. When the mounting cavity and permanent magnet 3 are removed, the filtration and sealing structure remains unchanged, serving as a universal filter for fixed-power models. It can also function normally even without the Hall sensor 4 installed on the main unit, enabling flexible configuration across the product line.

[0049] Example 1 based on permanent magnet 3: Please refer to Figures 9-10The mounting cavity includes an eccentric mounting cavity 102 fixedly connected to one eccentric side of the filter cavity 101. The eccentric mounting cavity 102 is located on one side of the lever 105. The permanent magnet 3 includes a strip neodymium iron boron magnet 301, which is encapsulated in the eccentric mounting cavity 102. The Hall sensor 4 is located on the rotation path of the strip neodymium iron boron magnet 301.

[0050] Example 2 based on permanent magnet 3: Please refer to Figures 11-12 Based on the first embodiment of the permanent magnet 3, the mounting cavity further includes an annular mounting cavity 103 concentrically fixed to the filter cavity 101. The annular mounting cavity 103 is located on the opposite side of the lever 105. The permanent magnet 3 also includes a multi-pole annular magnet 302, which is encapsulated within the annular mounting cavity 103. The Hall sensor 4 is located on the rotation path of the multi-pole annular magnet 302. To improve output linearity, an additional compensating magnet is embedded on the opposite side of the lever 105, or a multi-pole annular magnet 302 is used, making the relationship between rotation angle and magnetic field strength closer to linear.

[0051] Please see Figures 13-14 In one embodiment of the filter section 2, a metal mesh 201 is used. In another embodiment of the filter section 2, a microporous array plate 202 is used.

[0052] Please see Figure 15 Example 1 of the detachable structure: The filter body 1 is made of silicone rubber material (the filter body 1 is integrally molded using liquid silicone rubber LSR). The detachable structure includes an interlocking groove 801 opened in the filter body 1, and the filter part 2 is squeezed and interlocked in the interlocking groove 801.

[0053] Please see Figure 16 Embodiment 2 of the detachable structure: The detachable structure includes a pressing groove 802 opened in the filter body 1 and an annular pressing block 803 (interference fit with the filter body 1) inserted into the pressing groove 802. The inner wall of the pressing block 803 has a plurality of recessed handles 804 arranged in a circumferential array. The filter part 2 is pressed into the pressing groove 802 by the pressing block 803. The pressing block 803 prevents the filter part 2 from jumping when the pressure fluctuates. When disassembling, the pressing block 803 can be taken out by prying the handles 804 with your fingers.

[0054] Please see Figure 6 , Figure 9 and Figure 11A limiting structure 10 is installed on the mounting collar 5. The rotation path of the limiting structure 10 and the lever 105 is on the same horizontal plane, and the rotation angle of the lever 105 is 0° to 180°. A ratchet ring 12 is provided on the outer wall of the filter body 1. A pawl 11 is installed on the mounting collar 5, which is on the same horizontal plane as the ratchet ring 12. One end of the pawl 11 is movably connected to the mounting collar 5, and a torsion spring is provided at the movable connection. The other end of the pawl 11 is attached to the ratchet ring 12 for reverse limiting. In fact, the setting position of the limiting structure 10 can be determined as needed. It is used to limit the rotation angle of the lever 105. The structure of the ratchet ring 12 and the pawl 11 is a ratchet locking structure in the prior art, which restricts the reverse rotation of the filter body 1 in case of accident. The reverse rotation can be achieved by rotating the pawl 11 to separate it from the ratchet ring 12.

[0055] When installing this component, press it in along the direction of the main unit's water inlet. The snap-fit ​​connector 7 is installed with the main unit's water inlet in an interference fit. When the user rotates the lever 105, the polarity and distance of the permanent magnet 3 relative to the Hall sensor 4 at the bottom of the main unit change. The Hall sensor 4 outputs an analog voltage, and the control board adjusts the duty cycle of the main unit's water pump accordingly to achieve stepless power control.

[0056] Please see Figure 17 The horizontal axis represents the rotation angle, or stroke, from 0 to 180 degrees. The vertical axis represents the voltage change value of Hall sensor 4, from 0.4V to 1.2V. As can be seen from the figure, the rotation causes a very obvious voltage change. This voltage change can be used as a signal to drive the MCU to execute the corresponding output power, thereby realizing stepless speed regulation and controlling the output power of the water pump or host. This shows that this component has practical application prospects.

Claims

1. A magnetic filter assembly for a flushing device, characterized in that: The device includes a filter body (1), a filter section (2) installed in the filter body (1) by a detachable structure, and a permanent magnet (3) encapsulated in the filter body (1). The main unit of the flusher is equipped with a Hall sensor (4) near the water inlet. The Hall sensor (4) is electrically connected to the control circuit board of the flusher. The filter body (1) is provided with a port that communicates with the water inlet of the main unit of the flusher. The filter body (1) is provided with an installation collar (5) around its periphery. The filter body (1) can rotate around the axis of the water inlet. When the filter body (1) rotates, the position of the permanent magnet (3) relative to the Hall sensor (4) changes with the rotation of the filter body (1) so that the main unit of the flusher can read different magnetic field strengths.

2. The magnetic filter assembly for a flushing device according to claim 1, characterized in that: The mounting ring (5) is equipped with a washer (6), and a snap connector is integrally fixed on the mounting ring (5). The mounting ring (5) is snapped to the main unit inlet via the snap connector (7). A rotating table (104) is installed on the filter body (1), and the filter body (1) is rotatably connected to the mounting ring (5) via the rotating table (104).

3. A magnetic filter assembly for a flushing device according to claim 1, characterized in that: The filter body (1) includes a filter cavity (101) and a mounting cavity and a lever (105) installed on the filter cavity (101). The lever (105) protrudes outward on the outer edge of the filter cavity (101). The permanent magnet (3) is installed inside the filter cavity (101). A pointer (9) is provided on the lever (105). The pointer (9) is used for manual identification of the rotation position.

4. A magnetic filter assembly for a flushing device according to claim 1, characterized in that: The mounting cavity includes an eccentric mounting cavity (102) fixedly connected to the eccentric side of the filter cavity (101). The eccentric mounting cavity (102) is located on one side of the lever (105). The permanent magnet (3) includes a strip neodymium iron boron magnet (301). The strip neodymium iron boron magnet (301) is encapsulated in the eccentric mounting cavity (102). The Hall sensor (4) is located on the rotation path of the strip neodymium iron boron magnet (301).

5. A magnetic filter assembly for a flushing device according to claim 4, characterized in that: The mounting cavity also includes an annular mounting cavity (103) concentrically fixed on the filter cavity (101). The annular mounting cavity (103) is located on the opposite side of the lever (105). The permanent magnet (3) also includes a multi-pole annular magnet (302). The multi-pole annular magnet (302) is encapsulated in the annular mounting cavity (103). The Hall sensor (4) is located on the rotation path of the multi-pole annular magnet (302).

6. A magnetic filter assembly for a flushing device according to claim 1, characterized in that: The filter section (2) is a metal mesh (201) or a microporous array plate (202).

7. A magnetic filter assembly for a flushing device according to claim 1, characterized in that: The filter body (1) is made of silicone rubber. The detachable structure includes a fitting groove (801) opened in the filter body (1), and the filter part (2) is squeezed and fitted into the fitting groove (801).

8. A magnetic filter assembly for a flushing device according to claim 1, characterized in that: The detachable structure includes a pressing groove (802) opened in the filter body (1) and an annular pressing block (803) that is interference-fitted into the pressing groove (802). The inner wall of the pressing block (803) has a number of recessed handles (804) arranged in a circumferential array. The filter part (2) is pressed into the pressing groove (802) by the pressing block (803).

9. A magnetic filter assembly for a flushing device according to claim 3, characterized in that: A limiting structure (10) is installed on the mounting ring (5). The rotation path of the limiting structure (10) and the paddle (105) is on the same horizontal plane. The rotation angle of the paddle (105) is 0° to 180°.

10. A magnetic filter assembly for a flushing device according to claim 3, characterized in that: A ratchet ring (12) is provided on the outer wall of the filter body (1). A hook (11) is installed on the mounting collar (5) and is on the same horizontal plane as the ratchet ring (12). One end of the hook (11) is movably connected to the mounting collar (5), and a torsion spring is provided at the movable connection. The other end of the hook (11) is attached to the ratchet ring (12) for reverse limiting.

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