Hall liquid level sensor
By placing the float in the floating chamber of the Hall level sensor and detecting the liquid level changes with magnets and Hall components, the problem that the float of the existing Hall level sensor is easily blocked is solved, achieving stable and precise liquid level detection.
Patent Information
- Application Number
- CN202421818147.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The floats of existing Hall level sensors are easily blocked by debris, causing the sensor to not work properly.
A Hall liquid level sensor is designed, in which the float is placed in a floating chamber inside the outer cylinder. The float floats only after the liquid enters the floating chamber through the liquid inlet port, and a magnet is installed on the float. The Hall element detects the change in the position of the magnet and controls the output of different voltage signals of the PCB board.
The problem of external impurities blocking the float float is avoided, ensuring that the sensor can work normally, and the precision detection of liquid level height is achieved through the cooperation of magnets and Hall elements.
Smart Images
Figure CN222926265U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of liquid level sensors, and particularly relates to a Hall liquid level sensor. Background Art
[0002] A liquid level sensor is a sensor used to detect the height of a liquid, and can be applied in multiple equipment fields such as water purifiers, water heaters, coffee machines, dishwashers, water tanks, etc. Among them, the float of the existing liquid level sensor is sleeved outside the rod. When the liquid rises, the float rises relative to the rod, so that the Hall element can detect the position change of the magnet to realize liquid level monitoring. The disadvantage of this traditional structure Hall liquid level sensor is that if the float is exposed and blocked by sundries, it cannot float normally, resulting in the sensor being unable to work properly. Content of the Utility Model
[0003] Aiming at the above defects existing in the prior art, the technical problem to be solved by the utility model is to provide a Hall liquid level sensor with a stable and precise structure. The specific technical solutions are as follows:
[0004] A Hall liquid level sensor includes an outer cylinder, a float, a magnet, a Hall element and a control PCB board. A floating chamber is arranged inside the outer cylinder, and the outer cylinder is provided with a liquid inlet communicating with the floating chamber. The float is placed in the floating chamber. When the liquid enters the floating chamber from the liquid inlet, the float will float up. A magnet is installed on the float, and the control PCB board is installed above the outer cylinder. The Hall element is installed at the bottom of the control PCB board. When the Hall element detects the real-time change of the magnet position, the control PCB board will output signals with different voltage values to the outside.
[0005] As a preferred solution of the utility model, a convex column is arranged above the outer cylinder, and the control PCB board is installed inside the convex column.
[0006] As a preferred solution of the utility model, a pressing piece is installed inside the convex column, and the pressing piece presses the control PCB board.
[0007] As a preferred solution of the utility model, the control PCB board is provided with output terminals.
[0008] As a preferred solution of the utility model, the liquid inlet is divided into a low liquid inlet and a high liquid inlet, and the height from the high liquid inlet to the bottom of the outer cylinder is greater than the height from the low liquid inlet to the bottom of the outer cylinder.
[0009] As a preferred solution of the utility model, the Hall element faces the magnet directly.
[0010] As a preferred solution of the utility model, a cylinder cover is installed at the bottom of the outer cylinder. The cylinder cover is provided with an elastic buckle, and the outer cylinder is provided with a notch matched with the elastic buckle.
[0011] Beneficial effects: The float is placed in the floating chamber, and the liquid will cause the float to float only after entering the floating chamber from the liquid inlet, which can prevent external impurities from blocking the floating of the float. Moreover, since a magnet is installed on the float, the magnet will move with the float. When the magnet approaches or moves away from the Hall element, the intensity of the magnetic field will change. When the Hall element detects the real-time change in the position of the magnet, the control PCB board will continuously output different voltage value signals to the outside, such as outputting different voltage value signals to the MCU micro-control unit of the electrical equipment, and the MCU micro-control unit will then control the corresponding mechanism to act so as to control the liquid level. Brief Description of the Drawings
[0012] Figure 1 is a perspective view of the present utility model;
[0013] Figure 2 is an exploded view of the present utility model;
[0014] Figure 3 is a structural sectional view of the present utility model. Detailed Embodiment
[0015] The following further describes the detailed embodiment of the present utility model in conjunction with the drawings:
[0016] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0017] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0018] Such as Figures 1 to 3As shown in the figure, a Hall liquid level sensor includes an outer cylinder body 1, a float 2, a magnet 3, a Hall element 4 and a control PCB board 5. A floating chamber 11 is provided inside the outer cylinder body 1. The outer cylinder body 1 is provided with a liquid inlet communicating with the floating chamber 11. The float 2 is placed inside the floating chamber 11. The inner diameter of the floating chamber 11 is slightly larger than the outer diameter of the float 2. In this way, the liquid entering the floating chamber 11 from the liquid inlet will cause the float 2 to float. A magnet 3 is installed on the float 2. The magnet 3 is installed on the float 2 in an embedded manner and the upper surface of the magnet 3 is exposed. The control PCB board 5 is installed above the outer cylinder body 1. The Hall element 4 is installed at the bottom of the control PCB board 5. When the Hall element 4 detects the real-time change of the position of the magnet 3, the control PCB board 5 will output signals with different voltage values to the outside. When the magnet approaches or moves away from the Hall element, the intensity of the magnetic field will change. The increase in the magnetic field intensity will cause more electrons to shift, thus increasing the Hall voltage. On the contrary, the decrease in the magnetic field intensity will reduce the Hall voltage.
[0019] Specifically, a convex column 6 is provided above the outer cylinder body 1. The control PCB board 5 is installed inside the convex column 6. A pressing part 7 is installed inside the convex column 6. The pressing part 7 can be used to press and limit the control PCB board 5. The control PCB board 5 is provided with an output terminal 8. The output terminal 8 can be connected to the body of the control PCB board 5 through an electric wire.
[0020] Specifically, the liquid inlet is divided into a low liquid inlet 12 and a high liquid inlet 13. The height from the high liquid inlet 12 to the bottom of the outer cylinder body is greater than the height from the low liquid inlet 13 to the bottom of the outer cylinder body. And the Hall element 4 is directly opposite to the magnet 3. In this way, the magnetic field change when the magnet 3 approaches can be accurately detected.
[0021] Specifically, a cylinder cover 14 is installed at the bottom of the outer cylinder body 1. The cylinder cover 14 is provided with an elastic buckle 15. The outer cylinder body 1 is provided with a notch 16 matching with the elastic buckle 15. The cylinder cover 14 is installed at the bottom of the outer cylinder body 1 by snapping the elastic buckle 15 into the notch 16.
[0022] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.
Claims
1. A Hall liquid level sensor, characterized in that: It includes an outer cylinder, a float, a magnet, a Hall element and a control PCB board. A floating chamber is arranged inside the outer cylinder. The outer cylinder is provided with a liquid inlet communicated with the floating chamber. The float is placed in the floating chamber. When the liquid enters the floating chamber from the liquid inlet, the float will float. The magnet is installed on the float. The control PCB board is installed above the outer cylinder. The Hall element is installed at the bottom of the control PCB board. When the Hall element detects the real-time change of the magnet position, the control PCB board will output signals of different voltage values to the outside.
2. A Hall liquid level sensor according to claim 1, characterized in that: A convex column is arranged above the outer cylinder, and a control PCB board is installed in the convex column.
3. A Hall liquid level sensor according to claim 2, characterized in that: A pressing piece is installed inside the convex column, and the pressing piece presses the control PCB board.
4. A Hall liquid level sensor according to claim 1 or 2, characterized in that: The control PCB board is provided with output terminals.
5. A Hall liquid level sensor according to claim 1, characterized in that: The liquid inlet is divided into a low liquid inlet and a high liquid inlet, and the height from the high liquid inlet to the bottom of the outer cylinder is greater than the height from the low liquid inlet to the bottom of the outer cylinder.
6. A Hall liquid level sensor according to claim 1, characterized in that: The Hall element is facing the magnet.
7. A Hall liquid level sensor according to claim 1, characterized in that: A cylinder cover is installed at the bottom of the outer cylinder body. The cylinder cover is provided with an elastic buckle, and the outer cylinder body is provided with a notch matched with the elastic buckle.