A water flow switch

Abstract

The application relates to a water flow switch which comprises a switch piece, a base with an inner cavity and a shell detachably connected to the base, a water passing channel is arranged in the shell and is communicated at two ends, the switch piece comprises a sealing ring, a baffle, a swing rod, a rotating shaft and two permanent magnets, the two ends of the swing rod are fixed on the baffle and the rotating shaft respectively, the rotating shaft is rotationally connected to the shell, a fan-shaped slot for the swing rod to move is arranged in the shell, a sealing slot for the sealing ring to be installed is arranged in the shell, the swing rod is arranged in the sealing ring, the sealing ring is used for isolating the water passing channel and the inner cavity, one of the permanent magnets is arranged on the rotating shaft and is movably connected to the inner cavity, the other permanent magnet is arranged on the base and is close to the water inlet side, and the two permanent magnets repel each other. The rotating shaft is arranged close to the water inlet side, so that the rotating angle of the swing rod is larger, and the flow of the water flow switch is larger.

Description

Technical Field

[0001] This application relates to the field of flow switches, and more particularly to a flow switch. Background Technology

[0002] A flow switch is a sensor device used in electric water heaters, solar water heaters, air conditioners, and other water systems for processes such as water circulation control, inlet and outlet water control, water heating control, water pump on / off control, solenoid valve on / off control, or water outlet power-off and power-on control. When a certain flow rate is reached, it converts the water flow into a switch-type electrical signal.

[0003] Chinese patent application CN1270280A discloses a centrifugal pump device. The device includes a flow switch disposed within a flow channel for conveying fluid within the pump casing. The flow switch essentially consists of an electromagnetic switch and a pivotally mounted rod with two arms. One arm of the rod extends into the flow channel, and the other arm is equipped with a permanent magnet. The permanent magnet is connected to the switch device via non-contact excitation. The opening mechanism is housed in a junction box mounted on the device's outer casing. The rod is housed in a switch housing, which is tubular and hermetically sealed to the outside. Located near the junction box, the switch housing is magnetically energized, allowing a reed contact within the junction box to be controlled by the permanent magnet within the switch housing.

[0004] The above-mentioned technical solutions have the following drawbacks: the flow rate of the flow switch is limited. To increase the flow rate of the flow switch, the flow switch can only be made larger proportionally. However, the flow switch with a larger size cannot be adapted to certain installation scenarios. Summary of the Invention

[0005] In order to increase the flow rate of a flow switch with the same volume, this application provides a flow switch.

[0006] The water flow switch provided in this application adopts the following technical solution:

[0007] A water flow switch includes a switching component, a base with an inner cavity, and a housing detachably connected to the base. The housing has a water passage with two connected ends, one for water inlet and one for water outlet. The switching component includes a sealing ring, a baffle plate, a rocker arm, a rotating shaft, and two permanent magnets. The two ends of the rocker arm are fixed to the baffle plate and the rotating shaft, respectively. The rotating shaft is rotatably connected to the housing. The housing has a fan-shaped groove for the rocker arm to move. The baffle plate is movably connected within the water passage. The housing has a sealing ring for mounting the sealing ring. The groove has a through hole on the sealing ring, and the swing rod passes through the through hole. The sealing ring is used to isolate the water passage and the inner cavity. One permanent magnet is set on the rotating shaft and movably connected to the inner cavity, and the other permanent magnet is set on the base and close to the water inlet. The two permanent magnets repel each other. When there is no water flow in the water passage, the baffle completely blocks the water inlet. When there is water flow in the water passage, the baffle flips towards the water outlet to connect the water inlet and the water outlet. The rotating shaft is located at the center of the water passage and close to the water inlet.

[0008] By adopting the above technical solution and setting the rotating shaft closer to the water inlet, the swing arm can rotate at a larger angle when it rotates to the two extreme positions of the flow switch being fully closed and fully open. The opening angle after the baffle flips will also be larger, thereby increasing the flow rate of the flow switch. At the same time, the larger opening angle can reduce the drop of water in the pipe, allowing the water to pass through the flow switch faster.

[0009] Preferably, the swing arm is inclinedly mounted on the baffle plate, and the baffle plate is located on the side of the swing arm that is bent toward the water outlet end.

[0010] By adopting the above technical solution, the swing arm and the baffle are inclined together. With the same amount of swing arm rotation, the baffle can open to a larger angle, thereby increasing the flow rate of the water flow switch by increasing the flow channel.

[0011] Preferably, the outlet end is provided with a flared opening, which is gradually widened from the side near the inlet end to the side away from the inlet end.

[0012] By adopting the above technical solution, the flared opening can further increase the flow rate of the flow switch by increasing the size of the channel through which water flows.

[0013] Preferably, it also includes a driving component. The baffle includes a fixed plate and a movable plate. The fixed plate is fixed to the swing arm. The movable plate is slidably connected to the fixed plate at the end near the fixed plate away from the swing arm. The driving component drives the movable plate to slide. When the baffle is flipped to the water inlet end, the movable plate moves to the end of the fixed plate away from the swing arm and together with the fixed plate blocks the water inlet end. When the baffle is flipped towards the water outlet end to connect the water inlet end and the water outlet end, the movable plate gradually moves to face the fixed plate.

[0014] By adopting the above technical solution, when the baffle plate flips towards the outlet end to connect the inlet and outlet ends, the moving plate moves towards the fixed plate, which reduces the area of ​​the baffle plate blocking the water flow and allows the baffle plate to rotate at a larger angle, thereby further increasing the flow rate of the flow switch.

[0015] Preferably, the driving component includes a pull rope, a first spring, a first gear, a second gear, and a winding roller. The first spring is disposed on a movable plate and a fixed plate and drives the movable plate to always move toward the side away from the swing arm to a state that can block the water inlet. The first gear is coaxially fixedly connected to the rotating shaft. The second gear is rotatably connected to the inner cavity along an axis parallel to the rotating shaft. The first gear is meshed with the second gear. The winding roller is coaxially fixedly connected to the second gear. One end of the pull rope is fixed to the movable plate, and the other end of the pull rope passes through the fixed plate and the swing arm in sequence, finally extending out from the rotating shaft and winding onto the winding roller.

[0016] By adopting the above technical solution, when the water flow impacts the baffle and drives the baffle to flip, the rotating shaft rotates and drives the winding roller to rotate in the opposite direction to the rotating shaft through the meshing of the first gear and the second gear. The winding roller can wind up the pull rope, thereby overcoming the elastic force of the first spring and pulling the moving plate towards the swing arm side.

[0017] Preferably, a fixing ring is fitted on the swing arm. The fixing ring is located on the side of the sealing ring near the water passage. The diameter of the fixing ring is larger than the diameter of the through hole when the sealing ring is not under force. The fixing ring is positioned close to the sealing ring.

[0018] By adopting the above technical solution, the fixed ring can play the role of positioning the sealing ring. At the same time, when the rocker arm is rotated, the fixed ring can abut against the sealing ring. The fixed ring can be regarded as part of the rocker arm, which can increase the contact area between the rocker arm and the sealing ring, and make the sealing ring seal the rocker arm better.

[0019] Preferably, a cylindrical groove is formed on the side of the sealing ring facing the water passage, and the cylindrical groove is coaxially arranged with the through hole. An annular groove is formed on the side of the sealing ring facing the inner cavity, and the annular groove is coaxially arranged with the cylindrical groove. The annular groove is located close to the cylindrical groove and surrounds the cylindrical groove.

[0020] By adopting the above technical solution, and by opening cylindrical grooves and annular grooves, the part of the sealing ring near the through hole is made to be the center. By reducing the thickness of the center part of the sealing ring, the deformability of the sealing ring is improved, so that the sealing ring can better wrap the rocker arm and improve the sealing performance of the sealing ring.

[0021] Preferably, it also includes a second driving component and a push block. The push block is slidably connected to the housing along the direction perpendicular to the axis of the annular groove when the sealing ring is not deformed. The push block extends into the annular groove and is movably connected within the annular groove. The second driving component drives the push block to move. When the baffle plate flips towards the water outlet side to connect the water inlet and the water outlet, the push block moves towards the rocker arm side so that the circumferential inner wall of the through hole always abuts against the rocker arm.

[0022] By adopting the above technical solution, when the swing rod swings to its limit position towards the water outlet, a gap is likely to appear between the swing rod and the through hole of the sealing ring due to the large swing amplitude. The push block can apply force to the center of the sealing ring, so that the circumferential inner wall of the through hole abuts against the swing rod, thereby improving the sealing performance of the sealing ring.

[0023] Preferably, the second driving component includes a push rod, a second spring, a shaped block, a transmission belt, and a rotating rod. The push rod is fixed on the push block and is slidably connected to the housing along an axis perpendicular to the annular groove. The second spring is disposed on the push rod and drives the push block to not apply force to the sealing ring without external force. The rotating rod is rotatably connected to the base along an axis parallel to the rotating shaft. The transmission belt is wound around the rotating rod and the rotating shaft. The shaped block is fixedly sleeved on the rotating rod and is always in contact with the push rod.

[0024] By adopting the above technical solution, when the water flow impacts the baffle and drives the baffle to flip, the rotating shaft rotates and drives the rotating rod to rotate through the transmission belt. The rotating rod rotates and drives the irregular block to rotate. The irregular block abuts against the push rod and drives the push rod to push the center part to move towards the swing rod at the appropriate time.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] By setting the rotating shaft closer to the water inlet, the swing arm rotates at a greater angle when it reaches the two extreme positions of the flow switch being fully closed and fully open. The angle at which the baffle flips open is also greater, thereby increasing the flow rate of the flow switch.

[0027] By creating cylindrical and annular grooves, the part of the sealing ring closest to the through hole is made central. By reducing the thickness of the central part of the sealing ring, the deformability of the sealing ring is improved, allowing the sealing ring to better wrap the rocker arm and improve the sealing performance of the sealing ring. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the flow switch in the open state according to an embodiment of this application.

[0030] Figure 3 It is along Figure 1 A cross-sectional view along line AA in the middle.

[0031] Figure 4 This is a schematic diagram of the structure of driver component one and driver component two in the embodiments of this application.

[0032] Figure 5 This is a schematic diagram of the water flow switch in the off state according to an embodiment of this application.

[0033] Figure 6 It is along Figure 2 A cross-sectional view along the BB line.

[0034] Figure 7 yes Figure 6 Enlarged view of point C in the middle.

[0035] Figure 8 yes Figure 4 Enlarged view of point D in the middle.

[0036] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Assembly block; 12. Water passage; 121. Water inlet; 122. Water outlet; 123. Flared opening; 124. Movable groove; 13. Fixing block; 131. Slot; 14. Slot; 15. Fan-shaped groove; 16. Sealing groove; 162. Through hole; 163. Cylindrical groove; 164. Annular groove; 165. Center part; 17. First groove; 2. Base; 21. Inner cavity; 22. Locking block; 3. Switching element; 31. Sealing ring; 32. Baffle; 321. Fixing piece; 32 11. Slide groove; 3212. Extension groove; 322. Moving plate; 33. Swing rod; 331. Fixing ring; 34. Rotating shaft; 341. Insert block; 35. Permanent magnet; 36. Drive component one; 361. Connecting rod; 362. Pull rope; 363. First spring; 364. First gear; 365. Second gear; 366. Winding roller; 4. Push block; 41. Drive component two; 411. Push rod; 412. Second spring; 413. Irregular block; 414. Transmission belt; 4141. First block; 415. Rotating rod. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0038] This application discloses a water flow switch.

[0039] Reference Figure 1 , Figure 2 This embodiment of a water flow switch includes a switch element 3, a base 2 with an inner cavity 21, and a housing 1 detachably connected to the base 2. The housing 1 is cylindrical, and a water passage 12 with two connected ends is provided inside the housing 1. The two ends of the water passage 12 are an inlet end 121 and an outlet end 122, respectively, located on both sides of the axis of the housing 1. One end of the housing 1 along its length is mounted on the base 2. Two locking blocks 22 are fixed to the end of the base 2 facing the housing 1. Two slots 14 matching the two locking blocks 22 are provided on the outer wall of the end of the housing 1 near the base 2. When the housing 1 is mounted on the base 2, the two locking blocks 22 are respectively engaged in the two slots 14.

[0040] Reference Figure 2 , Figure 3 The switch component 3 includes a sealing ring 31, a baffle 32, a rocker arm 33, a rotating shaft 34, and two permanent magnets 35. The two ends of the rocker arm 33 are fixed at the center positions of the baffle 32 and the rotating shaft 34 along their length, respectively. The axis of the rotating shaft 34 is perpendicular to the length of the rocker arm 33 and also perpendicular to the axis of the housing 1. (Refer to...) Figure 4 Two insert blocks 341 are coaxially fixed to the two end faces of the rotating shaft 34 along its length. Two fixing blocks 13 are fixed to the end face of the housing 1 facing the base 2. The two fixing blocks 13 are arranged facing each other, and slots 131 matching the insert blocks 341 are opened on the side faces of the two fixing blocks 13 respectively. The two insert blocks 341 correspond to the two slots 131 respectively. The insert blocks 341 extend into the corresponding slots 131 and are rotatably connected in the slots 131.

[0041] Reference Figure 5 , Figure 6 The housing 1 has a sector-shaped groove 15 for the swing rod 33 to move, and a movable groove 124 for the baffle 32 to move. Both the movable groove 124 and the sector-shaped groove 15 can communicate with the water passage 12. The baffle 32 is movably connected in the movable groove 124, and the swing rod 33 is movably connected in the sector-shaped groove 15. (Refer to...) Figure 6 , Figure 7The housing 1 also has a sealing groove 16 for installing the sealing ring 31. The sealing groove 16 is located between the sector groove 15 and the inner cavity 21 and connects the sector groove 15 and the inner cavity 21. The sealing ring 31 is located in the sealing groove 16. The sealing ring 31 is made of rubber or silicone material with good ductility. When no external force is applied to the sealing ring 31, the axial direction of the sealing ring 31 is parallel to the axial direction of the housing 1. A through hole 162 is coaxially opened on the sealing ring 31, and the rocker arm 33 passes through the through hole 162. The sealing ring 31 is used to isolate the water passage 12 and the inner cavity 21. The end of the swing rod 33 near the sealing ring 31 is columnar. A fixing ring 331 is coaxially fixed on the part of the swing rod 33 near the sealing ring 31. The fixing ring 331 is located on the side of the sealing ring 31 near the water passage 12. The diameter of the fixing ring 331 and the diameter of the columnar part of the swing rod 33 are both larger than the diameter of the through hole 162 when the sealing ring 31 is not under force. The fixing ring 331 is set close to the sealing ring 31.

[0042] Reference Figure 3 , Figure 6 One permanent magnet 35 is fixed to the rotating shaft 34 and movably connected to the inner cavity 21, while the other permanent magnet 35 is fixed to the base 2 and located on the side of the rotating shaft 34 away from the water outlet 122. The two permanent magnets 35 repel each other. When there is no water flow in the water passage 12, the baffle 32 rotates towards the water inlet 121 under the mutual repulsion of the two permanent magnets 35 until it abuts against the side of the movable groove 124 near the water inlet 121. At this time, the baffle 32 can completely block the water inlet 121, and at the same time, the swing rod 33 abuts against the side of the fan-shaped groove 15 near the water inlet 121. When water flows through the water passage 12, the water impacts the baffle 32. The baffle 32 overcomes the repulsive force of the two permanent magnets 35 and flips towards the water outlet 122, connecting the water inlet 121 and the water outlet 122. When the baffle 32 rotates to the point where the swing rod 33 abuts against the side of the fan-shaped groove 15 near the water outlet 122, the baffle 32 flips to its maximum extent. At this time, the projection of the housing 1 on the base 2 just covers the projection of the baffle 32 on the base 2.

[0043] Reference Figure 1 , Figure 2 The housing 1 includes two assembly blocks 11, which are symmetrically arranged. Each assembly block 11 can be considered as if the housing 1 has been cut in half along its axis. Two slots 131 are respectively formed on the two assembly blocks 11. Multiple positioning posts (not shown in the figure) are fixed on the side of one assembly block 11 facing the other assembly block 11. Multiple positioning slots (not shown in the figure) are formed on the other assembly block 11 to match the positioning posts. When the positioning posts are inserted into the positioning slots, the opposite sides of the two assembly blocks 11 fit tightly together. The assembly blocks 11 facilitate the installation of the switch component 3.

[0044] Reference Figure 3 , Figure 6 The rotating shaft 34 is located at the center of the water passage 12, near the inlet end 121. Analyzing the flow switch with the rotating shaft 34 horizontal, positioning the shaft 34 near the inlet end 121 increases the height difference between the end of the baffle 32 furthest from the rotating shaft 33 when the rocker arm 33 rotates to its two extreme positions of fully closed and fully open. This increases the distance between the end of the baffle 32 furthest from the rocker arm 33 and the end wall of the water passage 12 furthest from the rocker arm 33, thus increasing the flow rate of the flow switch. In summary, by increasing the rotation angle of the rocker arm 33, the opening angle of the baffle 32 is increased. Simultaneously, a larger opening angle reduces the drop in water flow within the pipe, allowing water to pass through the flow switch more quickly.

[0045] Reference Figure 3 , Figure 6 The swing rod 33 is inclinedly mounted on the baffle 32, which is located on the side of the swing rod 33 that bends towards the outlet end 122. The angle between the swing rod 33 and the baffle 32 is between 145° and 170°. Because the swing rod 33 and the baffle 32 are inclined, for the same amount of rotation of the swing rod 33, the baffle 32 can open to a larger angle, thereby increasing the flow rate of the flow switch by enlarging the flow channel.

[0046] Reference Figure 3 , Figure 6 The outlet 122 is provided with a flared opening 123, which gradually widens from the side near the inlet 121 to the side away from the inlet 121. The flared opening 123 increases the size of the channel through which water flows, thereby further increasing the maximum flow rate of the flow switch.

[0047] Reference Figure 3 , Figure 5 The baffle 32 includes a fixed plate 321 and a movable plate 322. The fixed plate 321 is fixed on the swing rod 33. A groove 3211 is provided on the side of the fixed plate 321 away from the water inlet end 121. The end of the groove 3211 away from the swing rod 33 extends through the fixed plate 321. The movable plate 322 is slidably connected to the groove 3211 along the length direction parallel to the swing rod 33. A drive member 36 is provided on the housing 1. The drive member 36 drives the movable plate 322 to slide. When the baffle plate 32 flips to the water inlet end 121, the movable plate 322 moves to the end of the fixed plate 321 away from the swing rod 33 and together with the fixed plate 321 blocks the water inlet end 121. When the baffle plate 32 flips towards the water outlet end 122 to connect the water inlet end 121 and the water outlet end 122, the movable plate 322 moves towards the swing rod 33 and into the slide groove 3211. When the baffle plate 32 flips towards the water outlet end 122 to the limit angle, the movable plate 322 is completely located in the slide groove 3211.

[0048] Reference Figure 3 , Figure 6 When the baffle 32 flips towards the outlet end 122 to connect the inlet end 121 and the outlet end 122, the movable plate 322 moves towards the fixed plate 321, making the area of ​​the baffle 32 blocking the water flow smaller. At the same time, because the space occupied by the baffle 32 is smaller, the baffle 32 and the swing rod 33 can rotate at a larger angle to further increase the maximum flow rate of the flow switch.

[0049] Reference Figure 3 , Figure 8 The driving component 36 includes a connecting rod 361, a pull rope 362, a first spring 363, a first gear 364, a second gear 365, and a winding roller 366. The connecting rod 361 is fixedly connected to the end face of the moving plate near the swing rod 33. The end face of the slide groove 3211 near the swing rod 33 has an extension groove 3212. The connecting rod 361 is slidably connected in the extension groove 3212 along the sliding direction parallel to the moving plate 322. The first spring 363 is located in the extension groove 3212, and its two ends are fixed to the side of the extension groove 3212 facing the swing rod 33 and the side of the connecting rod 361 facing the swing rod 33, respectively. When there is no external force, the first spring 363 always drives the moving plate 322 to move away from the swing rod 33 until it can block the water inlet end 121.

[0050] Reference Figure 3 , Figure 8 The first gear 364 is coaxially fixedly connected to the rotating shaft 34, and the second gear 365 is rotatably connected to the inner cavity 21 along a direction parallel to the axis of the rotating shaft 34. The first gear 364 meshes with the second gear 365. The winding roller 366 is coaxially fixedly connected to the second gear 365. One end of the pull rope 362 is fixed to the end face of the connecting rod 361 away from the moving plate 322, and the other end of the pull rope 362 passes through the fixed plate 321 and the swing rod 33 in sequence, finally extending out from the rotating shaft 34 and winding onto the winding roller 366. (Refer to...) Figure 3 , Figure 5 To prevent the pull rope 362 from getting wet, the end of the connecting rod 361 away from the moving piece 322 is always located in the extension groove 3212, and the extension groove 3212 is never connected to the water passage 12.

[0051] Reference Figure 6 , Figure 8 When the water flow impacts the baffle 32 and drives the baffle 32 to flip, the rotating shaft 34 rotates and drives the winding roller 366 to rotate in the opposite direction to the rotating shaft 34 through the meshing of the first gear 364 and the second gear 365. The winding roller 366 can wind up the pull rope 362, thereby overcoming the elastic force of the first spring 363 and pulling the moving piece 322 towards the swing rod 33.

[0052] Reference Figure 6 , Figure 7 A cylindrical groove 163 is formed on the side of the sealing ring 31 facing the water passage 12, and an annular groove 164 is formed on the side of the sealing ring 31 facing the inner cavity 21. When the sealing ring 31 is not deformed under stress, the cylindrical groove 163, the through hole 162, and the annular groove 164 are coaxially arranged. The cylindrical groove 163 is directly connected to the through hole 162, and the annular groove 164 is set close to the cylindrical groove 163 and surrounds the cylindrical groove 163.

[0053] Reference Figure 6 , Figure 7 By opening a cylindrical groove 163 and an annular groove 164, the portion of the sealing ring 31 located in the annular groove 164 is the central part 165. By reducing the thickness of the central part 165 of the sealing ring 31, the deformability of the sealing ring 31 is improved, so that the sealing ring 31 can better wrap the rocker arm 33 and improve the sealing performance of the sealing ring 31.

[0054] Reference Figure 7 , Figure 8 A push block 4 is slidably connected to the housing 1 along a direction perpendicular to the axis of the housing 1. A second driving member 41 is provided on the housing 1, which drives the push block 4 to move. The cross-section of the push block 4 is arc-shaped and matches the annular groove 164. The push block 4 extends into the annular groove 164 and is movably connected within the annular groove 164. When the baffle 32 flips towards the water outlet 122 to connect the water inlet 121 and the water outlet 122, the push block 4 gradually moves towards the rocker arm 33 so that the circumferential inner wall of the through hole 162 always abuts against the rocker arm 33.

[0055] Reference Figure 7 , Figure 8 When the swing rod 33 swings to its limit position towards the outlet end 122, a gap is likely to appear between the swing rod 33 and the through hole 162 of the sealing ring 31 due to the large swing amplitude. The push block 4 can apply force to the center part 165 of the sealing ring 31, so that the circumferential inner wall of the through hole 162 abuts against the swing rod 33, thereby improving the sealing performance of the sealing ring 31.

[0056] Reference Figure 7 , Figure 8The second driving component 41 includes a push rod 411, a second spring 412, a shaped block 413, a transmission belt 414, and a rotating rod 415. One end of the push rod 411 is fixed to the push block 4 along its length, and the other end of the push rod 411 is located on the side of the push block 4 away from the swing rod 33 and is slidably connected to the housing 1 along a sliding direction parallel to the push block 4. A first groove 17 is provided on the housing 1. A first block 4141 is fixed on the push rod 411. The first groove 17 is slidably connected to the push rod 411 along a sliding direction parallel to the push rod 411. The second spring 412 is located in the first groove 17, and both ends of the second spring 412 are respectively fixedly connected to the side of the first block 4141 near the swing rod 33 and the end face of the first groove 17 near the swing rod 33. When no external force is applied, the push block 4 does not apply force to the sealing ring 31. The rotating rod 415 is rotatably connected to the base 2 along an axis parallel to the rotating shaft 34. The transmission belt 414 is wound around the rotating rod 415 and the rotating shaft 34. The irregular block 413 is fixedly sleeved on the rotating rod 415. The irregular block 413 always abuts against the end of the push rod 411 away from the push block 4.

[0057] Reference Figure 7 , Figure 8 When the water flow impacts the baffle 32 and drives the baffle 32 to flip, the rotating shaft 34 rotates and drives the rotating rod 415 to rotate via the transmission belt 414. The rotating rod 415 rotates and drives the irregular block to rotate. The irregular block abuts against the push rod 411 and drives the push rod 411 to push the center part 165 toward the swing rod 33 at the appropriate time, so that the push block 4 can apply force to the center part 165 of the sealing ring 31, so that the circumferential inner wall of the through hole 162 abuts against the swing rod 33, thereby improving the sealing performance of the sealing ring 31.

[0058] The implementation principle of a flow switch according to an embodiment of this application is as follows: When no water flows through the flow switch, the baffle 32 abuts against the side of the movable groove 124 near the water inlet 121 under the mutual repulsion of the two permanent magnets 35, completely blocking the water inlet 121. When water flows through the flow switch, the water flow impacts the baffle 32, and the baffle 32 overcomes the repulsive force of the two permanent magnets 35 and flips towards the water outlet 122, connecting the water inlet 121 and the water outlet 122. At the same time, through a series of linkages, the movable piece 322 retracts into the slide groove 3211, thereby further increasing the maximum flow rate of the flow switch.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water flow switch, comprising a switch element (3), a base (2) with an inner cavity (21), and a housing (1) detachably connected to the base (2), wherein a water passage (12) with two connected ends is provided in the housing (1), the two ends of the water passage (12) being an inlet end (121) and an outlet end (122), characterized in that: The switch (3) includes a sealing ring (31), a baffle (32), a rocker arm (33), a rotating shaft (34), and two permanent magnets (35). The two ends of the rocker arm (33) are fixed to the baffle (32) and the rotating shaft (34), respectively. The rotating shaft (34) is rotatably connected to the housing (1). The housing (1) has a fan-shaped groove (15) for the rocker arm (33) to move. The baffle (32) is movably connected within the water passage (12). The housing (1) has a sealing groove (16) for the sealing ring (31) to be installed. A through hole (162) is provided on the ring (31), and the swing rod (33) passes through the through hole (162). The sealing ring (31) is used to isolate the water passage (12) and the inner cavity (21). One permanent magnet (35) is set on the rotating shaft (34) and movably connected to the inner cavity (21). The other permanent magnet (35) is set on the base (2) and close to the water inlet (121). The two permanent magnets (35) repel each other. When there is no water flow in the water passage (12), the baffle (32) completely blocks the water inlet (121). When water flows through the water passage (12), the baffle (32) flips towards the outlet end (122) to connect the inlet end (121) and the outlet end (122). The rotating shaft (34) is located at the center of the water passage (12) near the inlet end (121). The system also includes a driving component (36). The baffle (32) includes a fixed plate (321) and a movable plate (322). The fixed plate (321) is fixed to the swing arm (33), and the movable plate (322) is closer to the fixed plate (321) and further away from the swing arm (33). The end is slidably connected to the fixed plate (321). The driving component (36) drives the moving plate (322) to slide. When the baffle (32) flips to the water inlet end (121), the moving plate (322) moves to the end of the fixed plate (321) away from the swing rod (33) and together with the fixed plate (321) blocks the water inlet end (121). When the baffle (32) flips towards the water outlet end (122) to connect the water inlet end (121) and the water outlet end (122), the moving plate (322) gradually moves to face the fixed plate (321).

2. A flow switch according to claim 1, characterized in that: The swing rod (33) is inclinedly mounted on the baffle (32), and the baffle (32) is located on the side of the swing rod (33) that is bent toward the water outlet (122).

3. A flow switch according to claim 1, characterized in that: The outlet end (122) is provided with a flared opening (123), which is gradually widened from the side near the inlet end (121) to the side away from the inlet end (121).

4. A flow switch according to claim 1, characterized in that: The driving component (36) includes a pull rope (362), a first spring (363), a first gear (364), a second gear (365), and a winding roller (366). The first spring (363) is disposed on a movable plate (322) and a fixed plate (321) and drives the movable plate (322) to always move toward the side away from the swing arm (33) to a state that can block the water inlet end (121). The first gear (364) is coaxially fixedly connected to the rotating shaft (34), and the second gear (365) is... 365) is rotatably connected to the inner cavity (21) along the axis parallel to the rotating shaft (34). The first gear (364) is meshed with the second gear (365). The winding roller (366) is coaxially fixedly connected to the second gear (365). One end of the pull rope (362) is fixed to the moving plate (322). The other end of the pull rope (362) passes through the fixed plate (321) and the swing rod (33) in sequence, and finally extends out from the rotating shaft (34) and winds around the winding roller (366).

5. A flow switch according to claim 1, characterized in that: A fixing ring (331) is fitted on the swing arm (33). The fixing ring (331) is located on the side of the sealing ring (31) near the water passage (12). The diameter of the fixing ring (331) is larger than the diameter of the through hole (162) of the sealing ring (31) when it is not under force. The fixing ring (331) is set close to the sealing ring (31).

6. A flow switch according to claim 1, characterized in that: The sealing ring (31) has a cylindrical groove (163) on one side facing the water passage (12), and the cylindrical groove (163) is coaxially arranged with the through hole (162). The sealing ring (31) has an annular groove (164) on one side facing the inner cavity (21), and the annular groove (164) is coaxially arranged with the cylindrical groove (163). The annular groove (164) is located close to the cylindrical groove (163) and surrounds the cylindrical groove (163).

7. A flow switch according to claim 6, characterized in that: It also includes a second driving component (41) and a push block (4). The push block (4) is slidably connected to the housing (1) along the direction perpendicular to the axis of the annular groove (164) when the sealing ring (31) is not deformed. The push block (4) extends into the annular groove (164) and is movably connected in the annular groove (164). The second driving component (41) drives the push block (4) to move. When the baffle (32) flips towards the water outlet (122) to connect the water inlet (121) and the water outlet (122), the push block (4) moves towards the rocker arm (33) so that the circumferential inner wall of the through hole (162) always abuts against the rocker arm (33).

8. A flow switch according to claim 7, characterized in that: The second driving component (41) includes a push rod (411), a second spring (412), a shaped block (413), a transmission belt (414), and a rotating rod (415). The push rod (411) is fixed on the push block (4). The push rod (411) is slidably connected to the housing (1) along the axis perpendicular to the annular groove (164). The second spring (412) is set on the push rod (411) and drives the push block (4) to not apply force to the sealing ring (31) without external force. The rotating rod (415) is rotatably connected to the base (2) along the axis parallel to the rotating shaft (34). The transmission belt (414) is wound around the rotating rod (415) and the rotating shaft (34). The shaped block (413) is fixedly sleeved on the rotating rod (415). The shaped block (413) always abuts against the push rod (411).

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