TWM464642U - Liquid level sensing device - Google Patents

Description

Liquid level sensing device

The present invention relates to an inductive device, and more particularly to a liquid level sensing device.

Referring to FIG. 1 , a conventional liquid level sensing device 1 includes a hollow tube 11 , a reed switch 12 housed in the hollow tube 11 , and a set disposed outside the hollow tube 11 and having a ring magnetic property. The floating ring 13 of the component 131, and the plurality of wires 14, wherein each of the reed switches 12 has a reed switch 121, and two pins that are passed through the reed switch 121 and are respectively connected to the wires 14.

When the liquid level sensing device 1 is actually used to detect the liquid level of a water tank 15, the floating ring 13 will be driven to rise or fall with the liquid level and respectively drive the reed switch 12 located above or below to be turned on, so that the liquid is turned on. The external system device (not shown) connected to the bit sensing device 1 can correspondingly generate a corresponding action.

However, the reed switches 12 are in a completely unprotected state, and the most prone problem is that the reed switch 121 is broken, the damage rate is high, and the accuracy is lowered. In addition, in today's products, miniaturization is sought. Under the concept of refinement, it is gradually unable to meet the needs of the times.

Therefore, the purpose of the present invention is to provide a liquid level detection. The accuracy is good, and the overall volume is small, and can be widely applied to liquid level sensing devices of various miniaturized devices.

Therefore, the liquid level sensing device of the present invention can generate a liquid level sensing signal and is connected to an external system device. The liquid level sensing device comprises a hollow tube disposed at intervals in the hollow tube and at different heights. a Hall element, a plurality of wires housed in the hollow tube and electrically connected to the Hall elements, and a floating ring that is floatably sleeved on the hollow tube.

Wherein, the hollow tube comprises an open end and a closed end opposite to the open end, the wires are passed through the open end of the hollow tube and connected to the external system device. The floating ring is sleeved on the hollow tube and is moved up and down with the liquid surface, and the floating ring comprises a magnetic element in the form of a block, whereby the magnetic element is coupled to the phase when the floating ring moves up and down with the liquid level The corresponding Hall elements generate magnetic induction, which in turn causes the Hall elements to generate the level sensing signal and transmit it to the external system device.

The effect of the novel is that when the floating ring moves up and down with the change of the liquid level, the magnetic element in the floating ring will generate magnetic induction with the corresponding Hall element, and the corresponding Hall element will further sense the liquid level. The signal is transmitted to the external system device, thereby not only improving the liquid level detection accuracy, but also having a small overall structure, and can be widely applied to various miniaturized devices.

2‧‧‧ Liquid level sensing device

3‧‧‧ hollow tube

31‧‧‧Open end

32‧‧‧closed end

33‧‧‧ tube body

34‧‧‧ Groove

4‧‧‧ Hall element

41‧‧‧Ontology

42‧‧‧ feet

5‧‧‧Wire

6‧‧‧ Floating ring

61‧‧‧Magnetic components

62‧‧‧Bumps

7‧‧‧ Cover

8‧‧‧Water tank

Other features and effects of the present invention will be apparent from the following description of the drawings, in which: 1 is a partial cross-sectional side view showing a conventional liquid level sensing device; FIG. 2 is an exploded perspective view showing a first preferred embodiment of the present liquid level sensing device; and FIG. 3 is a partial cross-sectional side view illustrating The liquid level sensing device of the first preferred embodiment is for detecting the condition of the liquid level of a water tank; FIG. 4 is an exploded perspective view showing the second preferred embodiment of the liquid level sensing device of the present invention; 5 is a partial cross-sectional side view illustrating the condition of the liquid level sensing device of the second preferred embodiment for detecting the liquid level of the water tank.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 2 and 3, a first preferred embodiment of the liquid level sensing device 2 of the present invention, the liquid level sensing device 2 can generate a liquid level sensing signal and is connected to an external system device (not shown). The liquid level sensing device 2 includes a hollow tube 3, two Hall elements 4 disposed at different heights in the hollow tube 3, and most of which are accommodated in the hollow tube 3 and respectively associated with the A wire 5 electrically connected to the component 4, a floating ring 6 floatingly sleeved on the hollow tube 3, and a cover 7 for covering the floating ring 6.

The hollow tube 3 includes an open end 31 and a closed end 32 opposite to the open end 31. And each Hall element 4 includes a setting The body 41 in the hollow tube and a plurality of pins 42 pierced by the body 41. In addition, one end of each wire 5 is electrically connected to the pin 42 of the corresponding Hall element 4, and the other end of the wire 5 is pierced by the open end 31 of the hollow tube 3 and is external to the outside. System devices (not shown) are connected. In addition, the floating ring 6 is floatably sleeved on the hollow tube 3, and the floating ring 6 includes a magnetic element 61 in the form of a block.

Referring to FIG. 3, when the liquid level sensing device 2 is actually used to detect the liquid level of a water tank 8, the liquid level sensing device 2 is placed in the water tank 8, and the floating ring 6 floats on the liquid surface. And the hollow tube 3 is supported by the floating ring 6 and can also face upward with the open end 31. As the liquid level rises, the floating ring 6 also rises. When the magnetic element 61 in the floating ring 6 approaches the corresponding Hall element 4, the magnetic element 61 and the corresponding Hall The body 41 of the component 4 generates magnetic induction, and the corresponding Hall element 4 further transmits the liquid level sensing signal to the external system device (not shown) via the wires 5 for the corresponding action.

The liquid level sensing device 2 of the present invention, by the above-mentioned structural design, can actually produce the following effects in actual use:

(1) High sensing accuracy:

Since the Hall element 4 itself has a firm structure and is resistant to vibration, the liquid level sensing device 2 can accurately detect the preset liquid level by the arrangement of the Hall elements 4, and further the liquid The bit sensing signal is transmitted to a connected external system device (not shown) for the corresponding action.

(2) Can be widely used in various miniaturized devices:

Since the Hall element 4 itself has the advantages of compact structure and small volume, it is disposed in the hollow tube 3 and then connected to the wires 5, thereby saving space and thus can be widely applied to various miniaturization devices.

Referring to Figures 4 and 5, a second preferred embodiment of the liquid level sensing device 2 of the present invention is substantially similar to the first preferred embodiment, except that the outer peripheral surface of the hollow tube 3 is formed to have a length. A groove 34 extending in the axial direction of the hollow tube 3, and the floating ring 6 further includes a projection 62 for engaging with the groove 34.

Therefore, in use, the groove 34 is engaged with the protrusion 62 to prevent the hollow tube 3 from rotating relative to the floating ring 6, thereby avoiding affecting the magnetic induction of the Hall element 4 and the magnetic element 61. The position makes the magnetic element 61 more magnetically sensitive to the magnetically induced surface of the body 41 of the corresponding Hall element 4.

Therefore, in addition to the same effect as the first preferred embodiment, the preferred embodiment can prevent the hollow tube 3 from being opposed to the floating ring 6 by the arrangement of the groove 34 and the protrusion 62. Rotating so that the magnetic element 61 can be accurately brought close to the magnetic sensing surface of the body 41 of the corresponding Hall element 4, whereby the preset liquid level can be detected more accurately.

In summary, the liquid level sensing device 2 of the present invention has the advantages of high accuracy, accurate detection of a preset liquid level, and small volume, and can be widely applied to various small and small sizes. In the device, it meets the needs of the times, so it can achieve the purpose of this new type.

However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the present invention to the present invention. The simple equivalent changes and modifications made in the scope of patent application and the contents of the patent specification are still within the scope of this new patent.

2‧‧‧ Liquid level sensing device

3‧‧‧ hollow tube

31‧‧‧Open end

32‧‧‧closed end

4‧‧‧ Hall element

41‧‧‧Ontology

42‧‧‧ feet

5‧‧‧Wire

6‧‧‧ Floating ring

61‧‧‧Magnetic components

7‧‧‧ Cover

8‧‧‧Water tank

Claims (3)

A liquid level sensing device capable of generating a liquid level sensing signal and connected to an external system device, the liquid level sensing device comprising: a hollow tube including an open end and a closed end opposite to the open end The two Hall elements are disposed in the hollow tube at different heights; a plurality of wires are received in the hollow tube and electrically connected to the Hall elements, respectively, and the wires are The open end of the empty tube is pierced and connected to the external system device; and a floating ring is floatably sleeved outside the hollow tube and is moved up and down with the liquid surface, the floating ring comprises a block-shaped magnetic element When the floating ring is moved up and down with the liquid level, the magnetic element generates magnetic induction with the corresponding Hall element, so that the Hall elements generate the liquid level sensing signal and transmit to the external system device. The liquid level sensing device of claim 1, wherein the outer peripheral surface of the hollow tube is formed with a groove extending along an axial direction of the hollow tube, the floating ring further comprising a groove for engaging with the groove Bumps. The liquid level sensing device of claim 2, further comprising a cover for covering the floating ring.