Photoelectric pipeline liquid level sensor capable of preventing water drop residues
By setting the reflective surface on the prism structure of the photoelectric pipeline liquid level sensor and setting a water-repellent groove on the inner wall of the pipeline, the problem of false alarms caused by residual water droplets in the pipeline is solved, and the equipment is high reliability and stability are achieved.
Patent Information
- Application Number
- CN202421819596.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In existing pipeline-type liquid level sensors, residual water droplets often exist in the pipeline. If the water droplets fall in the identification area, it will cause false alarms and thus cause equipment failure.
A photoelectric pipeline liquid level sensor is designed to prevent water droplets from remaining. By setting the first reflective surface and the second reflective surface on the prism structure, and setting a hydrophobic groove on both sides of the inner wall of the pipeline structure, the residual water droplets are adsorbed and derived by the capillary action of the hydrophobic groove.
It effectively solves the problem of residual water droplets on the reflective surface of the prism structure, avoids false alarms caused by residual water droplets, and improves the reliability and stability of the equipment.
Smart Images
Figure CN222800117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid level sensors, in particular to a photoelectric pipeline liquid level sensor capable of preventing water droplets from remaining. Background Art
[0002] Photoelectric pipe level sensor is a sensor that detects whether there is water in the pipe. It is widely used in equipment that transmits liquid through water pipes, such as sweeping robots, floor scrubbers, and water dispensers. However, in the pipe level sensors currently on the market, there are often residual water droplets in the pipes. If the residual water droplets fall into the recognition area, a false alarm will occur, causing the equipment using the pipe level sensor to malfunction. Utility Model Content
[0003] The purpose of the utility model is to provide a photoelectric pipeline liquid level sensor that prevents water droplets from remaining in response to the existing technical status. If water droplets remain on the first reflecting surface and / or the second reflecting surface provided on the prism structure, they will be quickly adsorbed by the hydrophobic groove and guided out of the pipeline structure, thereby solving the problem of water droplets remaining on the reflecting surface provided on the prism structure.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A photoelectric pipeline liquid level sensor for preventing water drop residue comprises a shell structure, a pipeline structure, a light emitting device and a light receiving device;
[0006] The shell structure is provided with an installation cavity, and the light emitting device and the light receiving device are both fixedly arranged in the installation cavity of the shell structure;
[0007] The pipeline structure and the shell structure are integrally formed with a light-transmitting material, a prism structure integrally formed with the pipeline structure is provided in the pipeline structure, a first reflection surface and a second reflection surface are provided on the prism structure, the first reflection surface provided on the prism structure is used to reflect the outgoing light beam of the light emitting device to the second reflection surface provided on the prism structure, and the second reflection surface provided on the prism structure is used to reflect the light reflected by the first reflection surface provided on the prism structure to the light receiving device;
[0008] At least one hydrophobic groove is respectively arranged on the inner wall of the pipeline structure at the left and right sides of the prism structure, and the hydrophobic groove extends from one end of the pipeline structure to the other end thereof.
[0009] Furthermore, the first reflecting surface on the prism structure faces the water flow direction of the pipeline structure, and the second reflecting surface on the prism structure does not face the water flow direction of the pipeline structure, or the first reflecting surface on the prism structure does not face the water flow direction of the pipeline structure, and the second reflecting surface on the prism structure faces the water flow direction of the pipeline structure.
[0010] Furthermore, the light emitting device is an infrared light emitting device, and the light receiving device is an infrared light receiving device.
[0011] Furthermore, the shell structure and the pipeline structure are both made of PC transparent material.
[0012] Furthermore, the optical emitting device and the optical receiving device are both fixedly arranged on a PCBA board, and the PCBA board is fixedly arranged in the mounting inner cavity of the shell structure.
[0013] Furthermore, the PCBA board is connected with an electronic harness extending from the installation cavity to the outside of the installation cavity.
[0014] Furthermore, the light emitting direction of the light emitting device and the light incident direction of the light receiving device are both perpendicular to the inner wall of the installation cavity corresponding thereto, and the angle between the outgoing light beam of the light emitting device and the first reflecting surface and the second reflecting surface provided on the prism structure are both 45 degrees.
[0015] Furthermore, a plurality of reinforcing structures are provided between the outer wall of the pipeline structure and the outer wall of the shell structure, and each reinforcing structure is integrally formed with the pipeline structure and the shell structure.
[0016] The beneficial effects of the utility model are:
[0017] The utility model provides a photoelectric pipeline liquid level sensor that prevents water droplets from remaining. Drain grooves are arranged on the inner wall of the pipeline structure on the left and right sides of the prism structure, and the capillary action of the drain grooves generates an adsorption force on the water droplets in the pipeline structure. According to the above design, if water droplets remain on the first reflection surface and / or the second reflection surface provided on the prism structure, they will be quickly adsorbed by the drain grooves and guided out of the pipeline structure, thereby solving the problem of water droplets remaining on the reflection surface provided on the prism structure, and thus avoiding false alarms caused by residual water droplets. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a three-dimensional diagram of a photoelectric pipeline liquid level sensor for preventing water droplets from remaining in the utility model;
[0019] Figure 2 This is a side view of a photoelectric pipeline liquid level sensor for preventing water droplets from remaining in the utility model;
[0020] Figure 3 It is an enlarged schematic diagram of the shell structure and the pipeline structure of a photoelectric pipeline liquid level sensor for preventing water droplets from remaining in the utility model;
[0021] Figure 4 The utility model is a cross-sectional view of a photoelectric pipeline liquid level sensor for preventing water droplets from remaining.
[0022] Marking instructions: 1. Shell structure, 2. Pipe structure, 201. Drain groove, 3. Electronic wiring harness, 4. Prism structure, 5. Light emitting device, 6. Light receiving device, 7. PCBA board. DETAILED DESCRIPTION
[0023] The utility model will be further described below in conjunction with the accompanying drawings.
[0024] See also Figures 1 to 4 As shown, a photoelectric pipeline liquid level sensor for preventing water drop residue includes a housing structure 1, a pipeline structure 2, a light emitting device 5, and a light receiving device 6.
[0025] The housing structure 1 is provided with an installation cavity, and the light emitting device 5 and the light receiving device 6 are both fixedly arranged in the installation cavity of the housing structure 1. Exemplarily, in this embodiment, the light emitting device 5 is an infrared light emitting device, and the light receiving device 6 is an infrared light receiving device.
[0026] In the above technical solution, specifically, the light emitting device 5 and the light receiving device 6 are both fixedly arranged on the PCBA board 7, the PCBA board 7 is fixedly arranged in the installation cavity of the shell structure 1, and the PCBA board 7 is connected with an electronic harness 3 extending from the installation cavity to the outside of the installation cavity.
[0027] The pipeline structure 2 and the shell structure 1 are integrally formed of a light-transmitting material. For example, in this embodiment, the shell structure 1 and the pipeline structure 2 are both made of PC transparent material.
[0028] In the above technical solution, it is preferred that a plurality of reinforcing structures are provided between the outer wall of the pipe structure 2 and the outer wall of the shell structure 1, and each reinforcing structure is integrally formed with the pipe structure 2 and the shell structure 1 to improve the structural strength of the pipe structure 2 and the shell structure 1 after integrally forming.
[0029] A prism structure 4 integrally formed with the pipeline structure 2 is provided in the pipeline structure 2, and a first reflection surface and a second reflection surface are provided on the prism structure 4. The first reflection surface provided on the prism structure 4 is used to reflect the outgoing light beam of the light emitting device 5 to the second reflection surface provided on the prism structure 4, and the second reflection surface provided on the prism structure 4 is used to reflect the light reflected by the first reflection surface provided on the prism structure 4 to the light receiving device 6. Exemplarily, in this embodiment, the light emitting direction of the light emitting device 5 and the light incident direction of the light receiving device 6 are both perpendicular to the inner wall of the installation cavity corresponding thereto, and the outgoing light beam of the light emitting device 5 and the first reflection surface and the second reflection surface provided on the prism structure 4 are both 45 degrees apart.
[0030] In the above technical solutions, for the structural design of the prism structure 4, the optional technical solutions are as follows:
[0031] As a first implementation scheme, the first reflection surface provided on the prism structure 4 faces the water flow direction of the pipe structure 2, and the second reflection surface provided on the prism structure 4 does not face the water flow direction of the pipe structure 2;
[0032] As a second implementation scheme, the first reflection surface provided on the prism structure 4 does not face the water flow direction of the pipe structure 2 , and the second reflection surface provided on the prism structure 4 faces the water flow direction of the pipe structure 2 .
[0033] At least one hydrophobic groove 201 is provided on the inner wall of the pipe structure 2 on the left and right sides of the prism structure 4, and the hydrophobic groove 201 extends from one end of the pipe structure 2 to the other end thereof. By way of example, in this embodiment, a hydrophobic groove 201 is provided on the inner wall of the pipe structure 2 on the left and right sides of the prism structure 4.
[0034] The working principle of the pipeline liquid level sensor is as follows:
[0035] When there is no water in the pipe structure 2, the outgoing light beam of the light emitting device 5 is reflected by the first reflection surface and the second reflection surface provided on the prism structure 4 and returns to the light receiving device 6, and then the light signal is converted into a voltage value output to determine that there is no water in the pipe structure 2;
[0036] When there is water in the pipe structure 2 , the outgoing light beam of the light emitting device 5 will be refracted at the first reflecting surface provided on the prism structure 4 , causing the light receiving device 6 to fail to receive the light signal. The light signal is subsequently converted into a voltage value output to determine that there is water in the pipe structure 2 .
[0037] In general, the utility model arranges the hydrophobic grooves 201 on the inner wall of the pipe structure 2 on the left and right sides of the prism structure 4, and generates an adsorption force on the water droplets in the pipe structure 2 based on the capillary action of the hydrophobic grooves 201. According to the above design, if the water droplets remain on the first reflection surface and / or the second reflection surface provided on the prism structure 4, they will be quickly adsorbed by the hydrophobic grooves 201 and guided out of the pipe structure 2, thereby solving the problem of residual water droplets on the reflection surface provided on the prism structure 4, and further avoiding false alarms caused by residual water droplets.
[0038] Of course, the above are only preferred implementations of the present utility model, and are not intended to limit the scope of use of the present utility model. Therefore, any equivalent changes made to the principles of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A photoelectric pipeline liquid level sensor for preventing water droplets from remaining, characterized in that: It includes a shell structure, a pipeline structure, a light emitting device and a light receiving device; The shell structure is provided with an installation cavity, and the light emitting device and the light receiving device are both fixedly arranged in the installation cavity of the shell structure; The pipeline structure and the shell structure are integrally formed with a light-transmitting material, a prism structure integrally formed with the pipeline structure is provided in the pipeline structure, a first reflection surface and a second reflection surface are provided on the prism structure, the first reflection surface provided on the prism structure is used to reflect the outgoing light beam of the light emitting device to the second reflection surface provided on the prism structure, and the second reflection surface provided on the prism structure is used to reflect the light reflected by the first reflection surface provided on the prism structure to the light receiving device; At least one hydrophobic groove is respectively arranged on the inner wall of the pipeline structure at the left and right sides of the prism structure, and the hydrophobic groove extends from one end of the pipeline structure to the other end thereof.
2. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 1, characterized in that: The first reflecting surface on the prism structure faces the water flow direction of the pipeline structure, and the second reflecting surface on the prism structure does not face the water flow direction of the pipeline structure, or the first reflecting surface on the prism structure does not face the water flow direction of the pipeline structure, and the second reflecting surface on the prism structure faces the water flow direction of the pipeline structure.
3. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 1, characterized in that: The light emitting device is an infrared light emitting device, and the light receiving device is an infrared light receiving device.
4. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 1, characterized in that: The shell structure and the pipeline structure are both made of PC transparent material.
5. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 1, characterized in that: The optical emitting device and the optical receiving device are both fixedly arranged on a PCBA board, and the PCBA board is fixedly arranged in the installation inner cavity of the shell structure.
6. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 5, characterized in that: The PCBA board is connected with an electronic harness extending from the installation inner cavity to the outside of the installation inner cavity.
7. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 1, characterized in that: The light emitting direction of the light emitting device and the light incident direction of the light receiving device are both perpendicular to the inner wall of the installation cavity corresponding thereto, and the angle between the outgoing light beam of the light emitting device and the first reflection surface and the second reflection surface provided on the prism structure is 45 degrees.
8. The photoelectric pipeline liquid level sensor for preventing water drop residue according to claim 1, characterized in that: A plurality of reinforcing structures are arranged between the outer wall of the pipeline structure and the outer wall of the shell structure, and each reinforcing structure is integrally formed with the pipeline structure and the shell structure.