Magnetic induction water flow sensing control device

Abstract

The utility model provides a magnetic induction water flow sensing control device which comprises a switch body, a switch adjusting mechanism and a reed switch assembly, a front-back through containing cavity is formed in the switch body, the switch adjusting mechanism is arranged in the containing cavity, a magnetic core which moves along with the water flow is arranged on the switch adjusting mechanism, and the reed switch assembly is arranged in the containing cavity. A PCB is fixed outside the switch body, the reed switch assembly is fixed on the PCB and is used for sensing the displacement of the magnetic core, the reed switch assembly comprises a first reed switch and a second reed switch which are arranged side by side left and right and extend front and back, the front end point of the first reed switch is marked as a first end point, and the front end point of the second reed switch is marked as a second end point. And the first end point and the second end point are staggered front and back. The utility model can solve the problem that the magnetic control effect disappears when the magnetic core passes through the end point of one end of the reed switch, and has strong reliability and good control effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic induction switch technical field, specifically, relate to a kind of magnetic induction water flow sensing control device. BACKGROUND

[0002] Water flow switch is an important sensing device applied in electric water heater, solar water heater, air conditioner and other water systems, for water circulation control, water inlet and outlet control, water heating control, water pump switch control, electromagnetic valve on-off control or water power-off, water power-on control process, traditional water flow switch is usually composed of switch body, switch adjusting mechanism and dry reed, the switch body is internally provided with cavity, and inlet and outlet are respectively arranged at both ends, the switch adjusting mechanism includes the magnetic core that displacement is generated with water flow size, the PCB board is fixed outside the switch body, and the dry reed is installed on the PCB board.

[0003] The working principle of traditional water flow switch is that when water flow in pipeline enters inlet, magnetic core generates displacement under the action of water flow, approaches dry reed, and drives magnetic source to generate magnetic control effect to make sensor output guide signal, realizes subsequent control operation of equipment, when water flow disappears, magnetic core is reset under the action of reset spring thrust, and sensor output disconnects signal, stops system work.

[0004] However, traditional water flow switch has two significant defects, which limits its performance, first, when magnetic core approaches or moves away from dry reed, it needs to pass the end point of one end of dry reed, at this time, magnetic control effect will suddenly disappear, leading to system failure, affecting switch reliability, second, the existing water flow switch usually sets water flow passage in the middle of internal cavity, is formed by cavity wall inward shrinkage, and piston plug is arranged at the rear end of flow channel hole, and magnetic core is fixed on the plug, in order to make plug not affect water flow channel, the aperture of flow channel hole is usually small, leading to that the thrust of water flow to move magnetic core is small, when magnetic core fails to approach near the middle of dry reed, magnetic induction effect is poor, which affects the performance of magnetic induction switch, so that switch cannot realize reliable control. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming at least one defect in prior art, providing a kind of magnetic induction water flow sensing control device that can solve the problem of magnetic control effect disappearance when magnetic core passes the end point of one end of dry reed, strong reliability and good control effect.

[0006] In order to solve the above problems, the utility model provides a kind of magnetic induction water flow sensing control device, including switch body, switch adjusting mechanism and reed tube assembly, the inside of switch body is equipped with the cavity that penetrates from front to back, switch adjusting mechanism is arranged in cavity, magnetic core is equipped on switch adjusting mechanism and generates displacement with water flow size, the outside of switch body is fixed with PCB board, reed tube assembly is fixed on PCB board and is used to induct the displacement of magnetic core, reed tube assembly includes first reed tube and second reed tube, and first reed tube and second reed tube are arranged side by side and extend from front to back, the front end point of first reed tube is marked as first end point, and the front end point of second reed tube is marked as second end point, first end point and second end point are arranged staggered from front to back.

[0007] Compared with prior art, the utility model has beneficial effects that: the utility model is designed as two reed tubes arranged side by side, and the front end points of the two reed tubes are staggered from front to back, so that when the magnetic core passes the end point of any one of the reed tubes, although the magnetic control effect disappears at the end point of the reed tube, the magnetic core has not passed the end point of the other reed tube, and the magnetic control effect still exists between the magnetic core and the reed tube assembly, so that the magnetic control effect is avoided to disappear completely, and the reliability of the switch is improved. At the same time, the magnetic core can always be kept near the middle of the reed tube, the magnetic induction effect is better, and the control effect is better.

[0008] As an improvement, the front end opening of the cavity is the water inlet, the rear end opening of the cavity is the water outlet, a threaded groove is formed in the front end cavity wall of the cavity, an annular pressing block is threadedly connected in the threaded groove, the rear end cavity wall of the cavity extends inward to form an annular step, the switch adjusting mechanism comprises a water inlet end valve core, a water outlet end valve core and a telescopic adjusting assembly for arranging a magnetic core, the water inlet end valve core and the water outlet end valve core are tightly fixed between the annular pressing block and the annular step from front to back, the water inlet end valve core is an annular structure with a sealed rear end, a middle water inlet passage is arranged in the middle part of the water inlet end valve core and communicates with the water inlet, a circumferential water inlet passage is arranged between the water inlet end valve core and the cavity wall of the cavity, water inlet end flow channels are circumferentially and spacedly arranged on the circumferential wall of the water inlet end valve core and communicate with the middle water inlet passage and the circumferential water inlet passage, the water outlet end valve core is an annular structure with a sealed front end, a middle water outlet passage is arranged in the middle part of the water outlet end valve core and communicates with the water outlet, a circumferential water outlet passage is arranged between the water outlet end valve core and the cavity wall of the cavity, water outlet end flow channels are circumferentially and spacedly arranged on the circumferential wall of the water outlet end valve core and communicate with the middle water outlet passage and the circumferential water outlet passage, the circumferential water inlet passage and the circumferential water outlet passage are communicated, the rear end of the water outlet end valve core extends to the side of the cavity wall to form an annular seat, the annular seat is placed on the annular step, the telescopic adjusting assembly comprises a push block and a spring which are sequentially abutted between the rear end face of the water inlet end valve core and the front end of the annular seat from front to back, the two ends of the magnetic core are abutted between the push block and the spring, the push block moves forward and backward in the circumferential water outlet passage and is sealed on both sides between the outer circumferential wall of the water outlet end valve core and the cavity wall of the cavity, and is used for controlling the opening size of the water outlet end flow channels. After the structure is applied, water flows from the circumferential side of the water inlet end valve core to the circumferential side of the water outlet end valve core and pushes the magnetic core to move forward and backward on the circumferential side of the water outlet end valve core, the larger the aperture of the cavity, the larger the water flow channel can be designed, thereby, the large flow of water flow is ensured, at the same time, due to the arrangement of the annular push block in the structure, the larger the aperture of the cavity, the greater the water flow push and pull of the annular push block, which makes the magnetic core more easily close to the middle part of the reed tube, in addition, the water inlet end valve core blocks the water outlet end valve core from the water inlet side, which can avoid that the ultraviolet rays entering the cavity from the water inlet irradiate on the water outlet end valve core, thereby protecting the water outlet end valve core, the telescopic adjusting assembly and the magnetic core installed on the water outlet end valve core, and avoiding the telescopic adjusting assembly structure from losing function due to the structure aging of the water outlet end valve core.

[0009] As an improvement, an annular groove recessed to the outside is formed in the cavity wall, a sealing ring is embedded in the annular groove, the annular groove is communicated with the threaded groove, a folded edge is formed on the outside of the front end of the water inlet end valve core and tightly fixed between the sealing ring and the annular pressing block. After the structure is applied, a double sealing structure is formed between the water inlet end valve core and the cavity, the first double sealing is formed by the tightness between the water inlet end valve core and the annular pressing block, the second double sealing is formed by the tightness between the sealing ring and the annular groove, the double sealing structure effectively prevents the water flow from leaking between the water inlet end valve core and the cavity, improves the sealing performance of the water flow switch and makes it more reliable.

[0010] As improvement, the switch body is externally provided with a mounting groove, the PCB board is fixed in the mounting groove, and a sealing cover is arranged at the opening of the mounting groove. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a whole structure schematic view of the utility model;

[0012] Figure 2 It is Figure 1 It is a sectional view along A-A line;

[0013] Figure 3 It is a partial structure schematic view of the utility model.

[0014] Mark explanation:

[0015] 1, switch body; 10, cavity; 100, threaded groove; 101, water inlet; 102, water outlet; 103, annular groove; 2, switch adjusting mechanism; 21, water inlet end valve core; 211, middle water inlet channel; 212, circumferential water inlet channel; 213, water inlet end flow channel; 214, folded edge; 22, water outlet end valve core; 221, middle water outlet channel; 222, circumferential water outlet channel; 223, water outlet end flow channel; 224, annular seat; 23, telescopic adjusting assembly; 231, push block; 232, spring; 3, dry reed tube assembly; 31, first dry reed tube; 310, first end point; 32, second dry reed tube; 320, second end point; 4, magnetic core; 5, PCB board; 6, annular pressing block; 7, annular step; 8, sealing ring; 9, mounting groove; 91, sealing cover. DETAILED DESCRIPTION

[0016] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings.

[0017] As Figures 1 to 3As shown, the magnetic induction water flow sensing control device, including switch body 1, switch adjusting mechanism 2 and reed tube assembly 3, the inside of switch body 1 is equipped with the cavity 10 that penetrates from front to back, switch adjusting mechanism 2 is arranged in cavity 10, switch adjusting mechanism 2 is equipped with the magnetic core 4 that generates displacement with water flow size, the outside of switch body 1 is fixed with PCB board 5, reed tube assembly 3 is fixed on PCB board 5 and is used for the displacement of magnetic core 4 is inducted, reed tube assembly 3 includes first reed tube 31 and second reed tube 32 that are arranged side by side and extend from front to back, the front end point of first reed tube 31 is recorded as first end point 310, the front end point of second reed tube 32 is recorded as second end point 320, first end point 310 and second end point 320 are staggered from front to back.

[0018] The utility model discloses a reed tube assembly 3 is designed as two reed tubes and is arranged side by side, and the front end point of two reed tubes is staggered from front to back, so that when the magnetic core 4 passes the end point of one end of any reed tube, although the magnetic control effect disappears at the end point of the reed tube, but since the magnetic core 4 does not pass the end point of one end of another reed tube, the magnetic control effect still exists between the magnetic core 4 and the whole reed tube assembly 3, so that the complete disappearance of the magnetic control effect is avoided, and the reliability of the switch is improved.

[0019] As Figure 2As shown, the front end opening of the cavity 10 is the water inlet 101, the rear end opening of the cavity 10 is the water outlet 102, the front end cavity wall of the cavity 10 is provided with a threaded groove 100, the annular pressing block 6 is threadedly connected in the threaded groove 100, the rear end cavity wall of the cavity 10 extends inwardly to form an annular step 7, the switch adjusting mechanism 2 comprises a water inlet end valve core 21, a water outlet end valve core 22 and a telescopic adjusting assembly 23 for setting the magnetic core 4, the water inlet end valve core 21 and the water outlet end valve core 22 are tightly fixed from front to rear between the annular pressing block 6 and the annular step 7, the water inlet end valve core 21 is an annular structure with a rear end seal, the middle part of the water inlet end valve core 21 is provided with a middle water inlet passage 211 communicating with the water inlet 101, the water inlet end valve core 21 is provided with a circumferential water inlet passage 212 between the cavity wall of the cavity 10, the circumferential wall of the water inlet end valve core 21 is circumferentially and spacedly provided with water inlet end flow channels 213 communicating the middle water inlet passage 211 with the circumferential water inlet passage 212, the water outlet end valve core 22 is an annular structure with a front end seal, the middle part of the water outlet end valve core 22 is provided with a middle water outlet passage 221 communicating with the water outlet 102, the water outlet end valve core 22 is provided with a circumferential water outlet passage 222 between the cavity wall of the cavity 10, the circumferential wall of the water outlet end valve core 22 is circumferentially and spacedly provided with water outlet end flow channels 223 communicating the middle water outlet passage 221 with the circumferential water outlet passage 222, the circumferential water inlet passage 212 and the circumferential water outlet passage 222 are communicated, the rear end of the water outlet end valve core 22 extends to the cavity wall side of the cavity 10 to form an annular seat 224, the annular seat 224 is placed on the annular step 7, the telescopic adjusting assembly 23 comprises a push block 231 and a spring 232 which are abutted from front to rear between the rear end face of the water inlet end valve core 21 and the front end of the annular seat 224 in sequence, the two ends of the magnetic core 4 are abutted between the push block 231 and the spring 232, the push block 231 moves in the circumferential water outlet passage 222 and is sealed between the outer circumferential wall of the water outlet end valve core 22 and the cavity wall of the cavity 10 on both sides, and is used for controlling the opening size of the water outlet end flow channels 223. After the structure is applied, water flows from the circumferential side of the water inlet end valve core 21 to the circumferential side of the water outlet end valve core 22 and pushes the magnetic core 4 to move forward and backward on the circumferential side of the water outlet end valve core 22, the larger the aperture of the cavity 10 is, the larger the water flow channel can be designed, thereby, the large flow of water flow is ensured, at the same time, due to the setting of the annular push block 231 in the structure, the larger the aperture of the cavity 10 is, the larger the water flow push and pull of the annular push block 231 is, which makes the magnetic core 4 more easily close to the middle part region of the reed tube, in addition, the water inlet end valve core 21 blocks the water outlet end valve core 22 from the water inlet 101 side, which can avoid that the ultraviolet light entering the cavity 10 from the water inlet 101 side irradiates on the water outlet end valve core 22, and protects the water outlet end valve core 22, the telescopic adjusting assembly 23 and the magnetic core 4 and the like installed on the water outlet end valve core 22 from the structure aging of the water outlet end valve core 22 to cause the telescopic adjusting assembly 23 structure to lose function.

[0020] As Figure 2As shown, an annular groove 103 is recessed outward on the cavity wall of the cavity 10. A sealing ring 8 is embedded in the annular groove 103. The annular groove 103 communicates with the threaded groove 100. A flange 214 extends outward from the front end of the inlet valve core 21. The flange 214 is pressed and fixed between the sealing ring 8 and the annular pressure block 6. With this structure, a double sealing structure is formed between the inlet valve core 21 and the cavity 10. The first seal is formed by the compression between the inlet valve core 21 and the annular pressure block 6, and the second seal is formed by the compression between the sealing ring 8 and the annular groove 103. This double sealing structure effectively prevents water leakage between the inlet valve core 21 and the cavity 10, improves the sealing performance of the flow switch, and makes it more reliable.

[0021] like Figure 3 As shown, the switch body 1 has a mounting groove 9 on its exterior, and the PCB board 5 is fixed inside the mounting groove 9. A sealing cover 91 is provided at the opening of the mounting groove 9. This design achieves the fixation and protection of the PCB board 5 by setting a mounting groove 9 on the exterior of the switch body 1 and sealing the opening with the sealing cover 91. The sealing cover 91 effectively prevents short circuits of the PCB board 5 inside the mounting groove 9 and dust accumulation on the reed switch, thereby ensuring the stable operation of the circuit and preventing dust from affecting the magnetic performance of the reed switch, thus improving the reliability and service life of the flow switch.

[0022] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A magnetic induction water flow sensing and control device, comprising a switch body (1), a switch adjustment mechanism (2), and a reed switch assembly (3), wherein the switch body (1) has a through cavity (10) extending from front to back, the switch adjustment mechanism (2) is disposed within the cavity (10), the switch adjustment mechanism (2) is provided with a magnetic core (4) that displaces with the magnitude of the water flow, a PCB board (5) is fixed to the outside of the switch body (1), and the reed switch assembly (3) is fixed to the PCB board (5) and used to sense the displacement of the magnetic core (4), characterized in that: The dry reed assembly (3) comprises a first dry reed (31) and a second dry reed (32) arranged side by side and extending front to back, the front end of the first dry reed (31) is marked as a first end point (310), and the front end of the second dry reed (32) is marked as a second end point (320), the first end point (310) and the second end point (320) are arranged front to back.

2. The magnetic induction water flow sensing control device of claim 1, wherein: The front end opening of the cavity (10) is the water inlet (101), the rear end opening of the cavity (10) is the water outlet (102), the front end cavity wall of the cavity (10) is provided with a threaded groove (100), the threaded groove (100) is threadedly connected with an annular pressing block (6), the rear end cavity wall of the cavity (10) extends inward to form an annular step (7), the switch adjusting mechanism (2) comprises a water inlet end valve core (21), a water outlet end valve core (22) and a telescopic adjusting assembly (23) for arranging the magnetic core (4), the water inlet end valve core (21) and the water outlet end valve core (22) are tightly fixed between the annular pressing block (6) and the annular step (7) from front to back, the water inlet end valve core (21) is an annular structure with a rear end seal, the middle part of the water inlet end valve core (21) is provided with a middle water inlet channel (211) communicating with the water inlet (101), the water inlet end valve core (21) and the cavity wall of the cavity (10) are provided with a circumferential water inlet channel (212), the circumferential wall of the water inlet end valve core (21) is circumferentially spaced to be provided with a water inlet end flow channel (213) communicating the middle water inlet channel (211) and the circumferential water inlet channel (212), the water outlet end valve core (22) is an annular structure with a front end seal, the middle part of the water outlet end valve core (22) is provided with a middle water outlet channel (221) communicating with the water outlet (102), the water outlet end valve core (22) and the cavity wall of the cavity (10) are provided with a circumferential water outlet channel (222), the circumferential wall of the water outlet end valve core (22) is circumferentially spaced to be provided with a water outlet end flow channel (223) communicating the middle water outlet channel (221) and the circumferential water outlet channel (222), the circumferential water inlet channel (212) and the circumferential water outlet channel (222) are communicated, the rear end of the water outlet end valve core (22) extends to the cavity wall side of the cavity (10) to form an annular seat (224), the annular seat (224) is placed on the annular step (7), the telescopic adjusting assembly (23) comprises a push block (231) and a spring (232) abutting from front to back between the rear end face of the water inlet end valve core (21) and the front end of the annular seat (224), the two ends of the magnetic core (4) abut between the push block (231) and the spring (232), the push block (231) moves front to back in the circumferential water outlet channel (222) and is sealed on both sides between the outer circumferential wall of the water outlet end valve core (22) and the cavity wall of the cavity (10), and is used for controlling the opening size of the water outlet end flow channel (223).

3. The magnetic induction water flow sensing control device of claim 2, wherein: The cavity wall of the cavity (10) is provided with an outwardly recessed annular groove (103), a sealing ring (8) is inlaid in the annular groove (103), the annular groove (103) is communicated with the threaded groove (100), the front end of the water inlet end valve core (21) extends outward to form a folded edge (214), and the folded edge (214) is tightly fixed between the sealing ring (8) and the annular pressing block (6).

4. The magnetic induction water flow sensing control device of claim 1, wherein: An installation groove (9) is arranged outside the switch body (1), the PCB board (5) is fixed in the installation groove (9), and a sealing cover (91) is arranged at the opening of the installation groove (9).

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