Centrifugal pump with automatic control of motor start and stop

Abstract

The utility model belongs to centrifugal pump technical field, concretely relates to a centrifugal pump of automatic control motor start -stop. In view of the deficiency that the existing centrifugal pump cannot automatically start -stop according to whether water is used, the utility model uses the following technical scheme: a centrifugal pump of automatic control motor start -stop, the centrifugal pump of automatic control motor start -stop includes: pump body, including pump cavity, water inlet and water outlet, impeller, is located in the pump cavity, motor, drives impeller rotation, controller, controls motor start -stop, inductive switch, is located at the water outlet, is linked with the controller, wherein, the controller controls motor start -stop according to the signal from inductive switch, wherein, inductive switch detects water flow, when there is positive water flow in the water outlet, inductive switch sends the start signal to the controller, when there is no positive water flow in the water outlet, inductive switch sends the stop signal to the controller. The utility model has the beneficial effects that: according to whether the positive water flow of water outlet has, automatically controls motor start -stop.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, specifically relating to a centrifugal pump with automatic motor start-stop control. Background Technology

[0002] In applications such as household water supply pressurization, water heater pressurization, smart toilet pressurization, and geothermal circulation, centrifugal pumps are used multiple times to supply water and need to automatically start and stop based on water usage. However, existing centrifugal pumps cannot automatically start and stop based on water usage. Summary of the Invention

[0003] This invention addresses the shortcomings of existing centrifugal pumps that cannot automatically start and stop based on whether water is being used. It provides a centrifugal pump with automatic motor control, which can automatically start when the user uses water and automatically stop working when the user does not use water.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a centrifugal pump with automatic motor start-stop control, the centrifugal pump comprising:

[0005] Pump body, including pump chamber, inlet and outlet;

[0006] The impeller is located inside the pump chamber;

[0007] The motor drives the impeller to rotate;

[0008] The controller controls the start and stop of the motor;

[0009] A motion-activated switch is located at the water outlet and is connected to the controller;

[0010] The controller controls the motor to start and stop based on signals from the inductive switch.

[0011] The inductive switch detects water flow. When there is positive water flow at the outlet, the inductive switch sends a start signal to the controller. When there is no positive water flow at the outlet, the inductive switch sends a stop signal to the controller.

[0012] As an improvement, the inductive switch includes a magnetic induction element and a magnetic force element. The magnetic force element moves back and forth between a start position that sends a start signal and a stop position that sends a stop signal. A positive water flow causes the magnetic force element to move toward the start position.

[0013] As an improvement, the magnetic element oscillates back and forth; the inductive switch also includes a spring element that moves the magnetic element to a stop position.

[0014] As an improvement, the water outlet includes a water outlet portion and a switch mounting portion perpendicular to the water outlet portion. The inductive switch also includes a swing mounting base and a swing plate. The swing mounting base is located in the switch mounting portion. The swing plate includes an intermediate connecting portion connected to the swing mounting base, a magnetic mounting portion above the intermediate connecting portion, and a spring mounting base below the intermediate connecting portion. The magnetic element is fixed on the magnetic mounting portion of the swing plate.

[0015] As an improvement, the inductive switch also includes a base located in the water outlet section of the water outlet, and a swing mounting base is fixedly connected to the base; a seat limiting part is formed in the water outlet section of the water outlet.

[0016] As an improvement, a positioning structure is formed between the base and the swing mount, the positioning structure including a positioning pin and a positioning hole; and / or

[0017] The shape of the hole in the base is adapted to the shape of the magnetic switch mounting part of the swing plate, and a swing limiting part is formed in the base to prevent the swing plate from rotating in the direction of water inlet.

[0018] As an improvement, the elastic element is a compression spring, with one end fixed to the swing plate and the other end fixed to the swing mounting base.

[0019] As an improvement, the inductive switch also includes a switch base and a switch cover, with the magnetic induction element located in the switch cavity formed by the switch base and the switch cover, and the switch base and the water outlet are sealed together.

[0020] As an improvement, glue is poured into the switching cavity and the magnetic induction element is sealed.

[0021] As an improvement, the magnetic component is a magnet or a magnetic steel; the magnetic induction component is a Hall element.

[0022] This invention relates to a centrifugal pump with automatic motor start / stop control. An inductive switch is installed at the outlet. The inductive switch detects water flow. When there is positive water flow at the outlet, the inductive switch sends a start signal to the controller. When there is no positive water flow at the outlet, the inductive switch sends a stop signal to the controller. When water is used, positive water flow is generated at the outlet, and the inductive switch sends a start signal to the controller, which then commands the motor to start. When water is not used, there is no positive water flow at the outlet, and the inductive switch sends a stop signal to the controller, which then commands the motor to stop, thus achieving automatic motor start / stop. Positive water flow refers to the water flowing out of the outlet. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the centrifugal pump according to Embodiment 1 of this utility model.

[0024] Figure 2 This is a cross-sectional view of the centrifugal pump according to Embodiment 1 of this utility model.

[0025] Figure 3This is a schematic diagram of the outlet structure of the centrifugal pump according to Embodiment 1 of this utility model.

[0026] Figure 4 This is a schematic diagram of the induction switch of the centrifugal pump according to Embodiment 1 of this utility model.

[0027] Figure 5 This is a cross-sectional view of the induction switch of the centrifugal pump according to Embodiment 1 of this utility model.

[0028] Figure 6 This is an exploded view of the induction switch of the centrifugal pump according to Embodiment 1 of this utility model.

[0029] Figure 7 This is a schematic diagram of the base structure of the induction switch of the centrifugal pump according to Embodiment 1 of this utility model.

[0030] Figure 8 This is a cross-sectional view of some parts of the induction switch of the centrifugal pump according to Embodiment 1 of this utility model.

[0031] In the diagram, 1 represents the water outlet;

[0032] 11. Water outlet; 111. Seat limiting part;

[0033] 12. Switch mounting section;

[0034] 2. Induction switch;

[0035] 21. Base; 211. Swing limiting part; 212. Positioning hole;

[0036] 22. Swing mounting base; 221. Locating pin;

[0037] 23. Swing plate; 231. Intermediate connecting part; 232. Magnetic mounting part; 233. Elastic mounting base;

[0038] 24. Magnetic components;

[0039] 25. Elastic components;

[0040] 26. Switch socket;

[0041] 27. Opening and closing cover;

[0042] 28. Magnetic induction element;

[0043] 29. Sealing ring. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0045] See Figures 1 to 8 An embodiment of the present invention provides a centrifugal pump with automatic motor start-stop control, the centrifugal pump with automatic motor start-stop control comprising:

[0046] Pump body, including pump chamber, inlet and outlet;

[0047] The impeller is located inside the pump chamber;

[0048] The motor drives the impeller to rotate;

[0049] The controller controls the start and stop of the motor;

[0050] A motion-activated switch is located at the water outlet and is connected to the controller;

[0051] The controller controls the motor to start and stop based on signals from the inductive switch.

[0052] The inductive switch detects water flow. When there is positive water flow at the outlet, the inductive switch sends a start signal to the controller. When there is no positive water flow at the outlet, the inductive switch sends a stop signal to the controller.

[0053] This invention relates to an automatic control centrifugal pump for starting and stopping the motor. An inductive switch is installed at the outlet. The inductive switch detects water flow. When there is positive water flow at the outlet, the inductive switch sends a start signal to the controller. When there is no positive water flow at the outlet, the inductive switch sends a stop signal to the controller. When water is used, a positive water flow is generated at the outlet, and the inductive switch sends a start signal to the controller, which then instructs the motor to start. When water is not used, there is no positive water flow at the outlet, and the inductive switch sends a stop signal to the controller, which then instructs the motor to stop, thus achieving automatic start and stop of the motor.

[0054] Example 1

[0055] See Figures 1 to 8 According to Embodiment 1 of this utility model, an automatically controlled centrifugal pump for starting and stopping the motor includes:

[0056] The pump body includes a pump chamber, an inlet, and an outlet 1;

[0057] The impeller is located inside the pump chamber;

[0058] The motor drives the impeller to rotate;

[0059] The controller controls the start and stop of the motor;

[0060] Induction switch 2 is located at water outlet 1 and is connected to the controller;

[0061] The controller controls the motor to start and stop based on the signal from the inductive switch 2;

[0062] The induction switch 2 detects the water flow. When there is positive water flow in the outlet 1, the induction switch 2 sends a start signal to the controller. When there is no positive water flow in the outlet 1, the induction switch 2 sends a stop signal to the controller.

[0063] In this embodiment, the induction switch 2 includes a magnetic induction element 28 and a magnetic element 24. The magnetic element 24 moves back and forth between the start position where a start signal is issued and the stop position where a stop signal is issued. The positive water flow causes the magnetic element 24 to move toward the start position.

[0064] In this embodiment, the magnetic element 24 swings back and forth; the inductive switch 2 also includes an elastic element 25 that moves the magnetic element 24 to a stop position.

[0065] In this embodiment, the water outlet 1 includes a water outlet portion 11 and a switch mounting portion 12 perpendicular to the water outlet portion 11. The inductive switch 2 also includes a swing mounting base 22 and a swing plate 23. The swing mounting base 22 is located in the switch mounting portion 12. The swing plate 23 includes an intermediate connecting portion 231 connected to the swing mounting base 22, a magnetic mounting portion 232 above the intermediate connecting portion 231, and an elastic mounting base 233 below the intermediate connecting portion 231. A magnetic element 24 is fixed on the magnetic mounting portion 232 of the swing plate 23. The magnetic mounting portion 232 of the swing plate 23 has a mounting groove, and the magnetic element 24 is located in the mounting groove. Both ends of the intermediate connecting portion 231 of the swing plate 23 are inserted into the swing mounting base 22, and the intermediate connecting portion 231 of the swing plate 23 is rotatably connected to the swing mounting base 22.

[0066] In this embodiment, the angle between the magnetic mounting portion 232 and the elastic mounting base 233 of the swing plate 23 is greater than 90° and less than 180°. The swing angle of the swing plate 23 is approximately 45-60°.

[0067] In this embodiment, the inductive switch 2 also includes a base 21 located in the water outlet portion 11 of the water outlet 1, and a swing mounting base 22 is fixedly connected to the base 21; a seat limiting portion 111 is formed in the water outlet portion 11 of the water outlet 1.

[0068] In this embodiment, the shape of the hole in the base 21 is adapted to the shape of the magnetic switch mounting part 12 of the swing plate 23.

[0069] In this embodiment, a swing limiting part 211 is formed in the base 21, which prevents the swing plate 23 from rotating in the water inlet direction. The two extreme positions of the swing plate 23 are respectively limited by the swing limiting part 211 of the base 21 and the inner sidewall of the swing mounting seat 22. The part of the swing limiting part 211 facing the water outlet is lower than the part away from the water outlet, and the swing limiting part 211 is inclined. When there is no forward water flow, the swing plate 23 and the swing mounting seat 22 have a certain anti-backflow function.

[0070] In this embodiment, a positioning structure is formed between the base 21 and the swing mounting base 22. The positioning structure includes positioning pins 221 and positioning holes 212. The positioning pins 221 are formed on the swing mounting base 22, and the base 21 has positioning holes 212. There are two positioning pins 221 and two positioning holes 212.

[0071] In this embodiment, the base 21 is in the shape of a round tube, and the outer diameter of the base 21 is adapted to the inner diameter of the water outlet 11 of the water outlet 1.

[0072] In this embodiment, the base 21 has a groove adapted to the swing mounting base 22, and the bottom wall of the groove has a positioning hole 212 on the abutment plane. The swing mounting base 22 includes an upper cylindrical part and a lower insertion part. The upper cylindrical part has a bottom wall and forms the magnetic mounting part 232 of the swing plate 23 and the swing hole diameter of the magnetic member 24. The lower insertion part includes two parallel ears. The bottom wall of the upper cylindrical part has a through groove for mounting the middle connecting part 231 of the swing plate 23.

[0073] In this embodiment, the elastic element 25 is a compression spring, with one end fixed to the swing plate 23 and the other end fixed to the swing mounting base 22. Spring grooves are provided on both the elastic mounting part of the swing plate 23 and the swing mounting base 22, and the two ends of the compression spring are respectively located in the two spring grooves.

[0074] In this embodiment, the inductive switch 2 further includes a switch base 26 and a switch cover 27. The magnetic induction element 28 is located in the switch cavity formed by the switch base 26 and the switch cover 27. The switch base 26 and the water outlet 1 are sealed together. The switch base 26 and the switch cover 27 are tightly fitted together. In other embodiments, the switch base 26 and the switch cover 27 can also be fixed by means of threaded connection, adhesive bonding, etc.

[0075] In this embodiment, glue is poured into the switch cavity and the magnetic induction element 28 is sealed.

[0076] In this embodiment, the magnetic element 24 is a magnet or a magnetic steel; the magnetic induction element 28 is a Hall element. Specifically, the magnetic induction element 28 is a unipolar Hall switch.

[0077] In this embodiment, the centrifugal pump can have multiple modes, such as automatic mode and manual mode. In automatic mode, the motor starts when there is positive water flow at the outlet 1 and stops when there is no positive water flow. In manual mode, the controller does not control the motor according to the signal from the magnetic induction element 28, but controls it according to other signals such as a separate start button or stop button.

[0078] In this embodiment, the assembly process of the inductive switch 2 and the water outlet 1 is roughly as follows: First, the swing mounting base 22, the swing plate 23, the magnetic component 24 and the elastic component 25 are assembled together. The switch base 26, the magnetic induction component 28 and the lead wire are integrated by potting glue. Then, the base 21 is inserted into the water outlet 11 from the water outlet end of the water outlet 1 and reaches the seat limit part 111. The swing mounting base 22 is inserted into the switch mounting part 12 of the water outlet 1, and the swing mounting base 22 and the base 21 are assembled together by the positioning hole 212 and the positioning pin 221. Then, the switch base 26 is fixed to the switch mounting part 12 of the water outlet 1 by screws. Finally, the switch cover 27 is installed on the switch base 26.

[0079] In this embodiment, the working principle of automatic motor start-stop is as follows: When the valve connecting to outlet 1 is opened, due to the pressure difference, a positive water flow will be generated in outlet 1. The positive water flow overcomes the force of the elastic element 25, causing the elastic mounting part of the swing plate 23 to rotate upward. The magnetic element 24 on the swing plate 23 moves from the stop position to the start position. The magnetic induction element 28 senses the position change of the magnetic element 24 and sends a start signal to the controller. The controller instructs the motor to work to supply water. When the valve connecting to outlet 1 is closed, the positive water flow in outlet 1 disappears. The elastic element 25 causes the elastic mounting part of the swing plate 23 to rotate downward. The magnetic element 24 on the swing plate 23 moves from the start position to the stop position. The magnetic induction element 28 senses the position change of the magnetic element 24 and sends a stop signal to the controller. After receiving the stop signal, the controller instructs the motor to stop, terminating the water supply.

[0080] The beneficial effects of the centrifugal pump with automatic motor start / stop control in Embodiment 1 of this utility model are as follows: An inductive switch 2 is installed at its outlet 1. The inductive switch 2 detects the water flow. When there is positive water flow at outlet 1, the inductive switch 2 sends a start signal to the controller. When there is no positive water flow at outlet 1, the inductive switch 2 sends a stop signal to the controller. When water is used, positive water flow is generated at outlet 1, and the inductive switch 2 sends a start signal to the controller, which then commands the motor to start. When water is not used, there is no positive water flow at outlet 1, and the inductive switch 2 sends a start signal to the controller. The device sends a stop signal, and the controller commands the motor to stop, thereby realizing the automatic start and stop of the motor; the induction switch 2 adopts a magnetic element 24 (magnet or magnet) and a magnetic induction element 28 (Hall switch). The magnetic induction element 28 is reliably sealed and operates reliably; a swing plate 23 is set, and the magnetic element 24 is fixed on the swing plate 23. The swing of the swing plate 23 realizes the reciprocating motion of the magnetic element 24 between the start position and the stop position; the start signal is triggered by the positive water flow pushing the swing plate 23; the stop signal is triggered by the elastic element 25 pushing the swing plate 23.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A centrifugal pump with automatic motor start / stop control, characterized in that: The centrifugal pump with automatic motor start / stop control includes: The pump body includes a pump chamber, an inlet and an outlet (1); The impeller is located inside the pump chamber; The motor drives the impeller to rotate; The controller controls the start and stop of the motor; A sensor switch (2) is located at the water outlet (1) and connected to the controller; The controller controls the motor to start and stop based on the signal from the inductive switch (2); The induction switch (2) detects the water flow. When there is positive water flow in the outlet (1), the induction switch (2) sends a start signal to the controller. When there is no positive water flow in the outlet (1), the induction switch (2) sends a stop signal to the controller.

2. A centrifugal pump with automatic motor start / stop control according to claim 1, characterized in that: The induction switch (2) includes a magnetic induction element (28) and a magnetic element (24). The magnetic element (24) moves back and forth between the start position where a start signal is issued and the stop position where a stop signal is issued. The positive water flow causes the magnetic element (24) to move toward the start position.

3. A centrifugal pump with automatic motor start / stop control according to claim 2, characterized in that: The magnetic element (24) swings back and forth; the inductive switch (2) also includes a spring element (25) that moves the magnetic element (24) to the stop position.

4. A centrifugal pump with automatic motor start / stop control according to claim 3, characterized in that: The outlet (1) includes an outlet section (11) and a switch mounting section (12) perpendicular to the outlet section (11). The inductive switch (2) also includes a swing mounting base (22) and a swing plate (23). The swing mounting base (22) is located in the switch mounting section (12). The swing plate (23) includes an intermediate connecting part (231) connected to the swing mounting base (22), a magnetic mounting part (232) above the intermediate connecting part (231), and an elastic mounting base (233) below the intermediate connecting part (231). The magnetic component (24) is fixed on the magnetic mounting part (232) of the swing plate (23).

5. A centrifugal pump with automatic motor start / stop control according to claim 4, characterized in that: The inductive switch (2) also includes a base (21) located in the water outlet (11) of the water outlet (1), and a swing mounting base (22) is fixedly connected to the base (21); a seat limiting part (111) is formed in the water outlet (1) of the water outlet (1).

6. A centrifugal pump with automatic motor start / stop control according to claim 5, characterized in that: A positioning structure is formed between the base (21) and the swing mounting base (22), the positioning structure including a positioning pin (221) and a positioning hole (212); and / or, The shape of the hole in the base (21) is adapted to the shape of the magnetic switch mounting part (12) of the swing plate (23), and a swing limiting part (211) is formed in the base (21). The swing limiting part (211) prevents the swing plate (23) from rotating in the direction of water inlet.

7. A centrifugal pump with automatic motor start / stop control according to claim 4, characterized in that: The elastic element (25) is a compression spring. One end of the compression spring is fixed on the swing plate (23), and the other end is fixed on the swing mounting base (22).

8. A centrifugal pump with automatic motor start / stop control according to claim 3, characterized in that: The inductive switch (2) also includes a switch base (26) and a switch cover (27). The magnetic induction element (28) is located in the switch cavity formed by the switch base (26) and the switch cover (27). The switch base (26) and the water outlet (1) are sealed together.

9. A centrifugal pump with automatic motor start / stop control according to claim 8, characterized in that: The switch cavity is filled with glue and the magnetic induction element (28) is sealed.

10. A centrifugal pump with automatic motor start / stop control according to claim 2, characterized in that: The magnetic component (24) is a magnet or a magnetic steel; the magnetic induction component (28) is a Hall element.

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