A filter screen life sensor

Abstract

The utility model discloses a filter screen life sensor, including the regular polygonal prism, the regular polygonal prism outer wall is evenly distributed with a plurality of through groove, and the regular polygonal prism lower surface fixedly connected with connecting column, and the connecting column is connected with fastener on screw thread, and the connecting column is provided with through -hole, and the through -hole is connected in the through groove, and the through -hole is provided with the installation slot in, is provided with the circuit board in the installation slot, and the circuit board top fixedly connected with sensor module, the utility model discloses through adding a plurality of through groove on the regular polygonal prism, constitutes the protection type detection cavity and the flow guide structure, and the interference of airflow turbulence to sensor module is effectively reduced, and the temperature compensation of pressure data is carried out to the data processing unit through temperature compensation subunit, and the influence that environmental temperature measures pressure is corrected, solves the problem of pressure measurement value drift, improves the calculation accuracy, and the filter screen life percentage is directly calculated through life calculation subunit, so that the monitoring result is more intuitive, and the user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a filter life sensor. Background Technology

[0002] In the operation of air purification equipment, fresh air systems, and industrial dust removal devices, the filter, as a core filtration component, directly affects the purification efficiency and energy consumption due to its degree of clogging. To ensure continuous and stable operation, real-time monitoring of filter life is necessary. Existing monitoring devices generally employ differential pressure monitoring, which is based on the correlation between filter clogging and changes in air pressure: when the filter is brand new, air flows easily through it, resulting in a small pressure difference across the filter; as pollutants gradually accumulate on the filter surface, the filter's permeability decreases, airflow resistance increases, and the pressure difference across the filter rises accordingly. By preset a differential pressure threshold, a filter replacement reminder can be triggered, thus achieving the lifespan monitoring function. However, this monitoring device has the following drawbacks: 1. The output signal of the pressure sensor is easily affected by the ambient temperature. When the ambient temperature fluctuates, the sensitivity and zero point of the sensor will drift, causing the collected pressure value to deviate from the true value, thus causing errors in the calculation results; 2. In the duct system, the start and stop of the fan and sudden changes in wind speed will generate airflow turbulence, causing the signal collected by the pressure sensor to fluctuate at high frequencies. These irregular turbulent noises will mask the true pressure difference change trend caused by filter blockage, causing the monitoring data to be falsely high or low, thus seriously affecting the accuracy of lifespan determination; 3. Existing monitoring devices usually only output the raw differential pressure electrical signal, which cannot intuitively display the filter lifespan, resulting in a poor user experience. Utility Model Content

[0003] The purpose of this invention is to provide a filter life sensor to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a filter life sensor, comprising a regular polygonal prism, wherein multiple through grooves are evenly distributed on the outer wall of the regular polygonal prism, a connecting post is fixedly connected to the lower surface of the regular polygonal prism, a fastener is threadedly connected to the connecting post, a through hole is opened on the connecting post and is conductively connected to the through groove, an installation groove is opened in the through hole, a circuit board is arranged in the installation groove, a sensor module is fixedly connected to the top of the circuit board, a sealing ring is provided at the top of the sensor module, and a locking sleeve is provided at the bottom of the circuit board and is fixedly connected to the installation groove.

[0005] Preferably, the connecting post has an external thread, the fastener has an internal thread, and the internal thread is threaded onto the external thread.

[0006] Preferably, the sensor module includes a temperature sensor unit and a pressure sensor unit.

[0007] Preferably, the circuit board is electrically connected to an electrostatic discharge protection module, a power conversion module, a main control module, and an interface module, and the main control module is electrically connected to the electrostatic discharge protection module, the power conversion module, the interface module, and the sensor module, respectively, and the power conversion module is electrically connected to the electrostatic discharge protection module.

[0008] Preferably, the main control module includes a data processing unit, an original filter identification unit, and a calibration unit.

[0009] Preferably, the data processing unit includes a temperature compensation subunit and a lifetime calculation subunit.

[0010] The filter life sensor provided by this utility model has the following advantages: By adding multiple through slots to a regular polygonal prism to form a protective detection cavity and a flow guiding structure, the interference of airflow turbulence on the sensor module is effectively reduced; the data processing unit performs temperature compensation on the pressure data through the temperature compensation subunit, corrects the influence of ambient temperature on pressure measurement, solves the problem of pressure measurement drift, and improves calculation accuracy; the filter life percentage is directly calculated through the life calculation subunit, making the monitoring results more intuitive and improving the user experience. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is an exploded view of the overall three-dimensional structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the overall front view sectional structure of this utility model;

[0014] Figure 3 This is a bottom view of the connecting column structure of this utility model;

[0015] Figure 4 This is a block diagram of the circuit board structure of this utility model;

[0016] Figure 5 This is a block diagram of the main control module of this utility model;

[0017] Figure 6 This is a block diagram of the sensor module structure of this utility model.

[0018] In the diagram: 1. Regular polygonal prism; 11. Through slot; 12. Connecting post; 13. External thread; 14. Through hole; 15. Mounting slot; 2. Circuit board; 21. Electrostatic discharge protection module; 22. Power conversion module; 23. Main control module; 231. Data processing unit; 2311. Temperature compensation subunit; 2312. Lifespan calculation subunit; 232. Original filter identification unit; 233. Calibration unit; 24. Interface module; 25. Sensor module; 251. Temperature sensor unit; 252. Pressure sensor unit; 3. Sealing ring; 4. Fastener; 41. Internal thread; 5. Locking sleeve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Please see the appendix Figure 1 - Appendix Figure 6This utility model provides an embodiment of a filter life sensor, comprising a regular polyprism 1, with multiple through grooves 11 evenly distributed on the outer wall of the regular polyprism 1. A connecting post 12 is fixedly connected to the lower surface of the regular polyprism 1, and a fastener 4 is threaded onto the connecting post 12. A through hole 14 is formed on the connecting post 12 and is conductively connected to the through groove 11. A mounting groove 15 is formed in the through hole 14, and a circuit board 2 is disposed in the mounting groove 15. A sensor module 25 is fixedly connected to the top of the circuit board 2, and a sealing ring 3 is provided at the top of the sensor module 25. A locking sleeve 5 is provided at the bottom of the circuit board 2 and is fixedly connected to the mounting groove 15. The regular polyprism 1 and the connecting post 12 are connected to the filter life sensor. The connecting post 12 is an integral structure. The through groove 11 and through hole 14 are detection ports. The mounting groove 15 is used to accommodate the circuit board 2 and the sensor module 25. The sensor module 25 is used to detect temperature and pressure. The sealing ring 3 is used to improve the sealing between the sensor module 25 and the mounting groove 15. The locking sleeve 5 is used to limit the movement of the circuit board 2 and the sensor module 25. The connecting post 12 has an external thread 13, and the fastener 4 has an internal thread 41. The internal thread 41 is threaded onto the external thread 13. The internal thread 41 and the external thread 13 cooperate to realize the threaded connection between the fastener 4 and the connecting post 12. The sensor module 25 includes a temperature sensor unit 251 and a pressure sensor. Unit 252 includes a temperature sensor unit 251 for detecting temperature and a pressure sensor unit 252 for detecting pressure. Circuit board 2 is electrically connected to an electrostatic discharge protection module 21, a power conversion module 22, a main control module 23, and an interface module 24. The main control module 23 is electrically connected to the electrostatic discharge protection module 21, the power conversion module 22, the interface module 24, and the sensor module 25. The power conversion module 22 is electrically connected to the electrostatic discharge protection module 21. The electrostatic discharge protection module 21 provides electrostatic discharge protection to prevent damage to the sensor module 25. The power conversion module 22 converts 5V to 3.3V. Module 23 is used for data processing, and interface module 24 is used for installing signal lines. The main control module 23 includes a data processing unit 231, an original factory filter identification unit 232, and a calibration unit 233. The data processing unit 231 is used to calculate the filter life, the original factory filter identification unit 232 is used to identify whether a newly installed filter is an original factory filter, and the calibration unit 233 is used to calibrate the initial test benchmark. The data processing unit 231 includes a temperature compensation subunit 2311 and a life calculation subunit 2312. The temperature compensation subunit 2311 is used to perform temperature compensation on the pressure, and the life calculation subunit 2312 calculates the filter life based on the linear mapping relationship between pressure, noise, and life.

[0021] Working principle: When using this utility model, the fastener 4, in conjunction with the connecting post 12, fixes the device to the equipment to be monitored, ensuring that the regular polygonal prism 1 is positioned within the test chamber. The temperature sensor unit 251 in the sensor module 25 collects temperature data within the test chamber, and the pressure sensor unit 252 collects pressure data. The data processing unit 231 uses the temperature compensation subunit 2311 to compensate for the pressure, and the lifespan calculation subunit 2312 calculates the filter lifespan based on the linear mapping relationship between pressure, noise, and lifespan. The through groove 11 and through hole 14 allow airflow in, the mounting groove 15 accommodates the circuit board 2 and sensor module 25, the sealing ring 3 improves the sealing between the sensor module 25 and the mounting groove 15, the internal thread 41 engages with the external thread 13 to achieve a threaded connection between the fastener 4 and the connecting post 12, the locking sleeve 5 limits the movement of the circuit board 2 and sensor module 25, and the electrostatic discharge protection module 21... The sensor module 25 is protected against electrostatic discharge. The power conversion module 22 converts 5V to 3.3V. The main control module 23 processes data. The original filter identification unit 232 can detect the initial characteristic value of a newly installed filter by pre-calibrating the wind pressure and noise characteristic range of the original filter. If the measured value exceeds the preset threshold, it is determined to be a non-original filter and an alarm signal is sent via serial port. The calibration unit 233 resets the initial detection benchmark according to the actual air duct conditions and provides a custom configuration interface for filter type and density parameters. It can match the clogging characteristic curves of different filter materials and expand the monitoring scenarios for multiple types of filter media. The interface module 24 is used to install signal lines to establish a data connection with an external monitoring system. The algorithm formulas for the temperature compensation subunit 2311 and the life calculation subunit 2312 are as follows: Let the remaining life percentage of the filter media be L, the detected pressure value be P, the noise value be N, and the temperature compensation coefficient be K. T K T Related to ambient temperature, used to correct pressure measurements. The initial calibrated pressure reference value is P0, and the noise reference value is N0. max This represents the pressure limit when the filter is completely clogged, in N. max The noise limit value corresponding to a completely clogged filter is given by the pressure-life conversion factor K, which was calibrated through numerous experiments. The algorithm formula for the temperature compensation subunit 2311 is as follows:

[0022] P′=P×K T

[0023] The algorithm formula for lifetime calculation subunit 2312 is as follows:

[0024]

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A filter life sensor, comprising a regular polygonal prism (1), characterized in that: The outer wall of the regular polyprism (1) is evenly distributed with multiple through grooves (11). A connecting post (12) is fixedly connected to the lower surface of the regular polyprism (1). A fastener (4) is threaded onto the connecting post (12). A through hole (14) is opened on the connecting post (12), and the through hole (14) is connected to the through groove (11). An installation groove (15) is opened in the through hole (14). A circuit board (2) is set in the installation groove (15). A sensor module (25) is fixedly connected to the top of the circuit board (2). A sealing ring (3) is set at the top of the sensor module (25). A locking sleeve (5) is set at the bottom of the circuit board (2), and the locking sleeve (5) is fixedly connected to the installation groove (15).

2. A filter life sensor according to claim 1, characterized in that: The connecting column (12) is provided with an external thread (13), and the fastener (4) is provided with an internal thread (41), and the internal thread (41) is threadedly connected to the external thread (13).

3. A filter life sensor according to claim 1, characterized in that: The sensor module (25) includes a temperature sensor unit (251) and a pressure sensor unit (252).

4. A filter life sensor according to claim 1, characterized in that: The circuit board (2) is electrically connected to an electrostatic discharge protection module (21), a power conversion module (22), a main control module (23), and an interface module (24). The main control module (23) is electrically connected to the electrostatic discharge protection module (21), the power conversion module (22), the interface module (24), and the sensor module (25), respectively. The power conversion module (22) is electrically connected to the electrostatic discharge protection module (21).

5. A filter life sensor according to claim 4, characterized in that: The main control module (23) includes a data processing unit (231), an original filter identification unit (232), and a calibration unit (233).

6. A filter life sensor according to claim 5, characterized in that: The data processing unit (231) includes a temperature compensation subunit (2311) and a lifetime calculation subunit (2312).

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