阅读说明：本技术 一种双极性电容式液位开关 (Bipolar capacitance type liquid level switch ) 是由 罗伟杰 颜天宝 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种双极性电容式液位开关,包括外壳、PCB电路系统组件和环氧树脂填层,所述外壳包括外壳固定片、外壳螺纹道、螺纹限位片、分叉检测道和防挂液斜面,所述PCB电路系统组件设于外壳内,包括电容极脚、外接导线和容极触片,所述环氧树脂填层填充于PCB电路系统组件顶部。本发明通过所述容极触片一端与电容极脚连接,另一端与分叉检测道内壁相触、通过所述防挂液斜面从上到下向内倾斜,且直径逐渐变大和通过所述分叉检测道于外壳底端呈现镜像设置,且两者间开有一液位测量道等,为用户提供了一种检测准确和能应用于多种容器场景的双极性电容式液位开关。(The invention discloses a bipolar capacitance type liquid level switch which comprises a shell, a PCB circuit system component and an epoxy resin filling layer, wherein the shell comprises a shell fixing piece, a shell thread channel, a thread limiting piece, a bifurcation detection channel and a liquid hanging prevention inclined plane, the PCB circuit system component is arranged in the shell and comprises a capacitance pole foot, an external lead and a capacitance pole contact piece, and the epoxy resin filling layer is filled at the top of the PCB circuit system component. According to the invention, one end of the capacitance electrode contact piece is connected with the capacitance electrode pin, the other end of the capacitance electrode contact piece is contacted with the inner wall of the forked detection channel, the liquid-hanging-preventing inclined plane inclines inwards from top to bottom, the diameter of the liquid-hanging-preventing inclined plane gradually increases, the forked detection channel is arranged at the bottom end of the shell in a mirror image mode, a liquid level measurement channel is arranged between the liquid level detection channel and the forked detection channel, and the like, so that the bipolar capacitance type liquid level switch which is accurate in detection and can be applied to various container scenes is provided for users.)

1. A bipolar capacitive liquid level switch, comprising:

the shell comprises a shell fixing piece, a shell thread channel, a thread limiting piece, a bifurcation detection channel and an anti-liquid-hanging inclined plane, wherein the bifurcation detection channel is respectively arranged at the left side and the right side of the bottom end in the shell;

the PCB circuit system assembly is arranged in the shell and comprises capacitor pole pins, external leads and capacitor pole contact pieces, wherein the capacitor pole pins are respectively arranged in the forked detection channels, the capacitor pole contact pieces are respectively arranged on the inner sides of the capacitor pole pins in a mirror image mode, and the external leads extend to the outer ends of the capacitor pole pins;

and the epoxy resin filling layer is filled on the top of the PCB circuit system component.

2. The bipolar capacitive liquid level switch according to claim 1, wherein the branch detection channel is arranged in a mirror image manner at the bottom end of the housing, and a liquid level measurement channel is arranged between the branch detection channel and the housing.

3. The bipolar capacitive liquid level switch according to claim 1, wherein the liquid hanging prevention slope is inclined inward from top to bottom and gradually becomes larger in diameter.

4. The bipolar capacitive liquid level switch as claimed in claim 1, wherein the capacitor contact is a resilient tab inclined outward from top to bottom.

5. The bipolar capacitive liquid level switch according to claim 1, wherein one end of the capacitance contact piece is connected to the capacitance pin, and the other end of the capacitance contact piece is in contact with the inner wall of the branched detection channel.

Technical Field

The invention relates to the technical field of liquid level switches, in particular to a bipolar capacitance type liquid level switch.

Background

The conventional capacitance type liquid level switch is a single-electrode type sensing switch which adopts a capacitance electrode arranged on the side wall of a container and is used for monitoring the height of liquid level in a tank. The capacitance values generated by the capacitance electrodes are different under the two conditions that the liquid level is higher or lower than the probe electrode, and signals are sent to the system in real time, so that the purpose of controlling the water level is finally achieved.

Different liquids have different degrees of viscosity, for example, although the liquid level of detergent and the like drops below a detection point, the phenomenon of capacitance pole misjudgment and inaccurate detection are easily caused due to the existence of the wall hanging phenomenon of liquid residue.

Disclosure of Invention

The invention aims to provide a bipolar capacitance type liquid level switch which is accurate in detection and can be applied to various container scenes.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a bipolar capacitive liquid level switch comprising:

the shell comprises a shell fixing piece, a shell thread channel, a thread limiting piece, a bifurcation detection channel and an anti-liquid-hanging inclined plane, wherein the bifurcation detection channel is respectively arranged at the left side and the right side of the bottom end in the shell;

the PCB circuit system assembly is arranged in the shell and comprises capacitor pole pins, external leads and capacitor pole contact pieces, wherein the capacitor pole pins are respectively arranged in the forked detection channels, the capacitor pole contact pieces are respectively arranged on the inner sides of the capacitor pole pins in a mirror image mode, and the external leads extend to the outer ends of the capacitor pole pins;

and the epoxy resin filling layer is filled on the top of the PCB circuit system component.

Furthermore, the bifurcation detection channel is arranged at the bottom end of the shell in a mirror image mode, and a liquid level measurement channel is arranged between the bifurcation detection channel and the shell.

Further, the liquid-hanging prevention inclined plane inclines inwards from top to bottom, and the diameter of the liquid-hanging prevention inclined plane is gradually increased.

Furthermore, the electrode holding contact piece is an elastic piece which is inclined outwards from top to bottom.

Furthermore, hold utmost point contact one end and be connected with electric capacity utmost point foot, the other end touches with branching detection way inner wall mutually.

The invention has the beneficial effects that:

according to the invention, one end of the capacitance electrode contact piece is connected with the capacitance electrode pin, the other end of the capacitance electrode contact piece is contacted with the inner wall of the forked detection channel, the liquid-hanging-preventing inclined plane inclines inwards from top to bottom, the diameter of the liquid-hanging-preventing inclined plane gradually increases, the forked detection channel is arranged at the bottom end of the shell in a mirror image mode, a liquid level measurement channel is arranged between the liquid level detection channel and the forked detection channel, and the like, so that the bipolar capacitance type liquid level switch which is accurate in detection and can be applied to various container scenes is provided for users.

Drawings

FIG. 1 is one of the usage state diagrams of the present invention;

FIG. 2 is a second state diagram of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic structural view of the present invention;

fig. 5 is a sectional view of the housing of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

According to the description of fig. 1-5:

a bipolar capacitive liquid level switch comprising:

the shell 1 comprises a shell fixing piece 11, a shell thread channel 12, a thread limiting piece 13, a bifurcation detection channel 14 and an anti-liquid-hanging inclined plane 15, wherein the bifurcation detection channel 14 is respectively arranged at the left side and the right side of the bottom end in the shell 1, the shell thread channel 12 and the shell fixing piece 11 are arranged at the top of the shell 1 from top to bottom, the thread limiting piece 13 is connected to the outside of the shell thread channel 12, and the anti-liquid-hanging inclined plane 15 is respectively arranged at the front end and the rear end of the shell 1;

the PCB circuit system component 2 is arranged in the shell 1 and comprises capacitor pole pins 21, external leads 22 and capacitor pole contact pieces 23, wherein the capacitor pole pins 21 are respectively arranged in the forked detection channels 14, the capacitor pole contact pieces 23 are respectively arranged on the inner sides of the capacitor pole pins 21 in a mirror image mode, and the external leads 22 extend to the outer ends of the capacitor pole pins 21;

and the epoxy resin filling layer 3 is filled on the top of the PCB circuit system component 2.

Because the branch detection channel 14 is arranged at the bottom end of the housing 1 in a mirror image manner, and a liquid level measuring channel 141 is arranged between the branch detection channel and the housing, therefore, when the user uses the present invention, by installing the present invention in the liquid container, the liquid in the container will be filled at any position of the vertical height of the liquid level measuring channel 141 or because the liquid level is not higher than the liquid level in the liquid level measuring channel 141, when the liquid level is filled in the liquid level measuring channel 141, the output signal of the switch is changed, so that the judgment of the liquid level height by the system is realized, and because the shell 1 of the invention has fixed size, even if the residual liquid is hung on the wall on the shell 1 due to the application of the viscous liquid, as long as the liquid level drops to the gap between the liquid level measuring channels 141 of the shell, the system can distinguish so as to realize accurate judgment, because the liquid level measuring channel 141 is hollow, even if the residual liquid is hung on the wall and detected, no medium is arranged at the hollow part, and the conduction fails.

Because the liquid hanging prevention inclined plane 15 is inclined inwards from top to bottom and the diameter of the inclined plane is gradually increased, when a user uses the liquid hanging prevention device, liquid remained at the outer end of the shell 1 can drop downwards along the inclined plane through the arrangement of the inclined plane, and the liquid hanging phenomenon is avoided.

Because the electrode holding contact sheet 23 is an elastic sheet which inclines outwards from top to bottom, one end of the electrode holding contact sheet 23 is connected with the capacitor electrode pin 21, and the other end of the electrode holding contact sheet 23 is contacted with the inner wall of the forked detection channel 14, when a user uses the invention, in order to ensure that the position of the electrode holding contact sheet 23 in the PCB circuit system component 2 is tightly attached to the inner wall of the forked detection channel 14 and reduce unnecessary signal errors, the electrode holding contact sheet 23 is designed into an elastic sheet which inclines outwards from top to bottom, when the PCB circuit system component 2 enters the forked detection channel 14, the electrode holding contact sheet is firstly deformed outwards, after the PCB circuit system component 2 enters a required position, because of losing the entering power, the electrode holding contact sheet respectively rebounds inwards, thereby ensuring that the electrode holding contact sheet and the inner wall of the forked detection channel 14 are rubbed and contacted, thereby increasing the stability of signals, when the forked detection channel 14 is filled with liquid and emptied by the liquid, whether the liquid level covers the detection point of the electrode holding contact sheet 23 is judged by the difference of the mirror image corresponding to the electrode holding contact sheet 23, thereby judging the liquid level height of the container.

When a user uses the liquid level detection device, the shell fixing piece 11 is firstly contacted with the inner wall of the top of the liquid container, then is connected into the shell thread channel 12 through the thread limiting piece 13, and then is contacted with the top wall of the top of the liquid container, so that the liquid level detection device is tightly connected with the liquid container, and then the liquid level height is judged through the induction of the liquid level.

When a user uses the invention, the use of the epoxy resin filling layer 3 can not only protect the PCB circuit system component 2 from being damaged, but also prevent external water and the like from entering the invention to cause element damage.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.