Filtering structure capable of detecting service life of filter

Abstract

A filter structure capable of detecting service life of a filter relates to the technical field of filters. The device comprises a frame body; the filter is arranged in the frame body and is used for filtering airflow circulating in the frame body; the service life detection device is arranged on the air outlet side of the filter, is used for judging the service life of the filter and comprises a reference temperature detection module, an air speed temperature detection module and an MCU processing module; the MCU processing module is connected with the reference temperature detection module and the wind speed temperature detection module so as to obtain the first temperature detected by the reference temperature detection module and the second temperature detected by the wind speed temperature detection module, and the service life of the filter is judged through the first temperature and the second temperature. The technical scheme has the advantages that the service life of the filter can be detected, the filtering effect is ensured, the structure is simple, and detection is accurate and effective.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a filter structure that can detect the lifespan of a filter. Background Technology

[0002] Traditional filters primarily function to adsorb fine dust. Various dust particles and other substances in the air are gradually adsorbed onto the filter, so its lifespan is directly related to its dust holding capacity. However, current filter replacement is mainly based on fixed cycles, using a timer-based system to remind users to replace the filter when the usage time is up, without considering the specific condition of the filter. This fails to accurately reflect the filter's efficiency. For example, a filter might be replaced in a good environment and still usable, leading to waste; or it might be replaced in a poor environment, where the filter has lost its filtering function and may even cause secondary pollution, thus failing to be replaced in a timely manner. Utility Model Content

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a filter structure that can detect the filter life, which has the advantages of being able to detect the filter life, ensuring the filtration effect, having a simple structure, and being accurate and effective in detection.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a filter structure capable of detecting filter lifespan, comprising:

[0005] Frame;

[0006] A filter is installed inside the frame to filter the airflow flowing inside the frame;

[0007] A lifespan detection device, installed on the air outlet side of the filter, is used to determine the lifespan of the filter. It includes: a reference temperature detection module, an air velocity and temperature detection module, and an MCU processing module.

[0008] The reference temperature detection module includes a first thermistor with a large resistance value, the temperature of which is the same as the airflow temperature; the wind speed temperature detection module includes a second thermistor carrying a constant current, the second thermistor heating up under the action of the constant current, making the temperature of the second thermistor greater than the airflow temperature, and the airflow passing through the second thermistor also carrying away the heat on the surface of the second thermistor, affecting the temperature of the second thermistor and thus changing the resistance value of the second thermistor;

[0009] The MCU processing module is connected to the reference temperature detection module and the wind speed and temperature detection module respectively to obtain the first temperature detected by the reference temperature detection module and the second temperature detected by the wind speed and temperature detection module, and to determine the service life of the filter by the first temperature and the second temperature.

[0010] The present invention further includes, in that the wind speed and temperature detection module, a second power supply, a constant current source circuit, and a second thermistor.

[0011] The constant current source circuit is connected in series with the second thermistor in the second power supply.

[0012] In a further embodiment of this invention, the MCU processing module detects the voltage between the constant current source circuit and the second thermistor, analyzes the resistance value and temperature of the second thermistor, and obtains the second temperature.

[0013] The present invention further provides that the reference temperature detection module includes: a first power supply, a protection resistor, and a first thermistor;

[0014] The protective resistor circuit is connected in series with the first thermistor in the first power supply.

[0015] In a further embodiment of this invention, the MCU processing module detects the voltage between the protective resistor and the first thermistor, analyzes the resistance value and temperature of the first thermistor, and obtains the second temperature.

[0016] The present invention further provides that the first thermistor and the second thermistor are spaced apart to avoid the heating of the second thermistor affecting the first thermistor.

[0017] The present invention further includes a life detection device comprising a display module, wherein the display module is signal-connected to the MCU processing module to display or indicate the lifespan of the filter.

[0018] The present invention further includes: a light guide strip and an LED light;

[0019] The light guide strip is made of light guide material, spans the inner side of the frame, and is located on the air outlet side of the filter;

[0020] A photocatalyst is provided on the filter;

[0021] The LED light is mounted on the frame and abuts against the end of the light guide strip to guide the light emitted by the LED light into the interior of the light guide strip, and then illuminates the filter through the light guide strip, so that the photocatalyst on the filter can fully react and disinfect the airflow passing through the filter.

[0022] The present invention is further provided that the light guide strip is provided in multiple sets, and the multiple sets of light guide strips are arranged parallel to each other and spaced apart;

[0023] The first thermistor and the second thermistor are disposed between the light guide strip.

[0024] The present invention further provides that the first thermistor and the second thermistor are respectively disposed on the left and right sides of the middle part of the light guide strip.

[0025] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0026] The MCU processing module is connected to both the reference temperature detection module and the wind speed and temperature detection module to obtain the first temperature detected by the reference temperature detection module and the second temperature detected by the wind speed and temperature detection module. The lifespan of the filter is determined by analyzing the changes in wind speed attenuation across the range of the first and second temperatures, thereby assessing the filter's lifespan. The thermistor-based electronic components offer high stability, accurate detection, and a simple, low-cost structure. Attached Figure Description

[0027] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0030] Figure 3 This is an exploded view of the structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of this utility model;

[0032] Figure 5 This is an exploded view of the structure of this utility model from another perspective;

[0033] Figure 6 This is a schematic diagram of the life detection device of this utility model;

[0034] Figure 7 This is a structural schematic diagram of the life detection device of this utility model from another perspective.

[0035] Explanation of reference numerals in the attached drawings: 100, frame; 200, filter; 300, lifespan detection device; 310, reference temperature detection module; 320, wind speed and temperature detection module; 330, MCU processing module; 311, first thermistor; 321, second thermistor; 312, constant current source circuit; 322, second thermistor; 322, protection resistor; 400, light guide strip; 500, LED light. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0038] This embodiment relates to a filter structure capable of detecting filter lifespan, such as... Figure 1-7 As shown, it includes: a frame 100, a filter 200, and a life detection device 300.

[0039] The filter 200 is located inside the frame 100 and is used to filter the airflow flowing inside the frame 100. The lifespan detection device 300 is located on the air outlet side of the filter 200 and is used to determine the lifespan of the filter 200. Specifically, the lifespan detection device 300 includes: a reference temperature detection module 310, a wind speed and temperature detection module 320, and an MCU processing module 330.

[0040] The reference temperature detection module 310 is used to detect the temperature of the airflow on the outlet side of the filter 200. The reference temperature detection module 310 includes a first thermistor 311 with a large resistance. The large resistance of the first thermistor 311 results in a smaller current flowing through it, preventing it from generating much heat. This keeps the temperature of the first thermistor 311 close to the airflow temperature, which is designated as the first temperature. The wind speed and temperature detection module 320 is used to detect the temperature and wind speed of the airflow on the outlet side of the filter 200. The wind speed and temperature detection module 320 includes a second thermistor 321 carrying a constant current. The second thermistor 321 heats up under the constant current, causing its temperature to be higher than the airflow temperature. The airflow passing through the second thermistor 321 also carries away heat from its surface, affecting its temperature. The faster the airflow speed, the more heat is carried away, and the greater the impact on the temperature of the second thermistor 321. The temperature of the second thermistor 321 is designated as the second temperature. The MCU processing module 330 is connected to the reference temperature detection module 310 and the wind speed and temperature detection module 320 respectively to obtain the first temperature detected by the reference temperature detection module 310 and the second temperature detected by the wind speed and temperature detection module 320. The lifespan of the filter 200 is determined by analyzing the range of changes between the first and second temperatures, specifically by analyzing the wind speed attenuation changes of the filter 200, thereby determining the lifespan of the filter 200. The thermistor-based electronic component offers high stability, accurate detection, simple structure, and low cost.

[0041] In this embodiment, the wind speed and temperature detection module 320 includes: a second power supply, a constant current source circuit 312, and a second thermistor 321; the constant current source circuit 312 and the second thermistor 321 are connected in series in the second power supply to ensure that the second thermistor 321 always maintains a constant current. As a preferred solution, the MCU processing module 330 detects the voltage between the constant current source circuit 312 and the second thermistor 321, analyzes the resistance value and temperature of the second thermistor 321, and obtains the second temperature. Specifically, the resistance value of the second thermistor 321 is calculated using the current value of the constant current source circuit 312, the voltage between the constant current source circuit 312 and the second thermistor 321, and the voltage of the second power supply. The temperature of the second thermistor 321, i.e., the second temperature, is then calculated based on the temperature-resistance curve of the second thermistor 321, achieving good detection results that are simple and stable.

[0042] In this embodiment, the reference temperature detection module 310 includes: a first power supply, a protection resistor 322, and a first thermistor 311; the protection resistor 322 circuit and the first thermistor 311 are connected in series in the first power supply. As a preferred embodiment, the MCU processing module 330 detects the voltage between the protection resistor 322 and the first thermistor 311, analyzes the resistance value and temperature of the first thermistor 311, and obtains the second temperature. Specifically, the resistance value of the first thermistor 311 is calculated using the resistance value of the protection resistor 322, the voltage between the protection resistor 322 and the first thermistor 311, and the voltage of the first power supply. The temperature of the first thermistor 311, i.e., the first temperature, is then calculated based on the temperature-resistance curve of the first thermistor 311, achieving good detection results that are simple and stable.

[0043] As a preferred embodiment, the first thermistor 311 and the second thermistor 321 are spaced apart to avoid the heating of the second thermistor 321 affecting the first thermistor 311, thus ensuring the detection stability and accuracy of the life detection device 300. In this embodiment, the first power supply and the second power supply are the same power supply, and the reference temperature detection module 310 and the wind speed and temperature detection module 320 are connected in parallel.

[0044] As a preferred embodiment, the lifespan detection device 300 also includes a display module, which is connected to the MCU processing module 330 to display or indicate the lifespan of the filter 200, allowing users to intuitively understand the lifespan of the filter 200. The display module can be a vehicle infotainment system, mobile phone, display screen, or indicator light, etc., for greater user convenience.

[0045] In this embodiment, it also includes: a light guide strip 400 and an LED light 500; wherein, the light guide strip 400 is made of light guide material, is arranged across the inner side of the frame 100, and is located on the air outlet side of the filter 200; a photocatalyst is provided on the surface of the filter 200, and the photocatalyst is applied to the filter 200 by spraying or other means. LED lights 500 are mounted on the frame 100 and abut against the end of the light guide strip 400, allowing the light emitted by the LED lights 500 to be directly guided into the light guide strip 400. Since the light guide strip 400 is made of light-guiding material, the light from the LED lights 500 is conducted throughout the light guide strip 400, illuminating the filter 200 from all angles. This increases the illumination range, allowing the photocatalyst on the filter 200 to fully catalyze the reaction, generating strong oxidizing substances (such as hydroxyl radicals and oxygen) on the surface of the filter 200. These substances effectively decompose the cell walls of bacteria in the air and coagulate proteins, thus thoroughly killing bacteria. They also effectively remove formaldehyde, VOCs, allergens, mites, etc., achieving disinfection and sterilization of the air passing through the filter 200. Simultaneously, the filter 200 maintains its high-efficiency dust and particle filtration effect, achieving a dual effect of filtration and disinfection.

[0046] In this embodiment, multiple sets of light guide strips 400 are arranged parallel to each other and spaced apart to allow airflow to pass smoothly. Each set of light guide strips 400 is equipped with an LED light 5004. The multiple sets of light guide strips 400 illuminate the filter 200, allowing the photocatalyst on the filter 200 to react fully and achieve a good disinfection effect. The first thermistor 311 and the second thermistor 321 are arranged between the multiple sets of light guide strips 400 to prevent the light guide strips 400 from affecting the airflow temperature and wind speed passing through the first thermistor 311 and the second thermistor 321, thus affecting the stability and accuracy of the life detection device 300 and ensuring a good detection effect. As a preferred embodiment, the first thermistor 311 and the second thermistor 321 are respectively disposed on the left and right sides of the middle part of the light guide strip 400. This ensures that the heating of the second thermistor 321 does not affect the first thermistor 311, while making the airflow temperature passing through the first thermistor 311 and the second thermistor 321 as consistent as possible, thus guaranteeing good detection results.

[0047] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A filter structure for detecting filter lifespan, characterized in that, include: Frame (100); A filter (200) is provided inside the frame (100) for filtering the airflow flowing inside the frame (100); A lifespan detection device (300) is installed on the air outlet side of the filter (200) to determine the lifespan of the filter (200), and includes: a reference temperature detection module (310), a wind speed and temperature detection module (320), and an MCU processing module (330). The reference temperature detection module (310) includes: a first thermistor (311) with a large resistance value, the temperature of the first thermistor (311) being the same as the airflow temperature; the wind speed and temperature detection module (320) includes: a second thermistor (321) carrying a constant current, the second thermistor (321) heating up under the action of the constant current, causing the temperature of the second thermistor (321) to be greater than the airflow temperature, and the airflow passing through the second thermistor (321) also carrying away the heat on the surface of the second thermistor (321), affecting the temperature of the second thermistor (321) to change the resistance value of the second thermistor (321); The MCU processing module (330) is connected to the reference temperature detection module (310) and the wind speed temperature detection module (320) respectively, to obtain the first temperature detected by the reference temperature detection module (310) and the second temperature detected by the wind speed temperature detection module (320), and to determine the service life of the filter (200) by the first temperature and the second temperature.

2. The filter structure for detecting filter lifespan according to claim 1, characterized in that, The wind speed and temperature detection module (320) includes: a second power supply, a constant current source circuit (312), and a second thermistor (321); The constant current source circuit (312) and the second thermistor (321) are connected in series in the second power supply.

3. The filter structure for detecting filter lifespan according to claim 2, characterized in that, The MCU processing module (330) detects the voltage between the constant current source circuit (312) and the second thermistor (321), analyzes the resistance value and temperature of the second thermistor (321), and obtains the second temperature.

4. The filter structure for detecting filter lifespan according to claim 1, characterized in that, The reference temperature detection module (310) includes: a first power supply, a protection resistor (322), and a first thermistor (311); The protection resistor (322) circuit is connected in series with the first thermistor (311) in the first power supply.

5. The filter structure for detecting filter lifespan according to claim 4, characterized in that, The MCU processing module (330) detects the voltage between the protection resistor (322) and the first thermistor (311), analyzes the resistance value and temperature of the first thermistor (311), and obtains the second temperature.

6. The filter structure for detecting filter lifespan according to claim 1, characterized in that, The first thermistor (311) and the second thermistor (321) are spaced apart to avoid the heating of the second thermistor (321) affecting the first thermistor (311).

7. The filter structure for detecting filter lifespan according to claim 1, characterized in that, The life detection device (300) further includes a display module, which is signal-connected to the MCU processing module (330) to display or indicate the lifespan of the filter (200).

8. The filter structure for detecting filter lifespan according to claim 1, characterized in that, It also includes: a light guide strip (400) and an LED light (500); The light guide strip (400) is made of light guide material, spans the inner side of the frame (100), and is located on the air outlet side of the filter (200); A photocatalyst is provided on the filter (200); The LED light (500) is disposed on the frame (100) and abuts against the end of the light guide strip (400) to guide the light emitted by the LED light (500) into the interior of the light guide strip (400), and then illuminates the filter (200) through the light guide strip (400), so that the photocatalyst on the filter (200) reacts fully and disinfects the airflow passing through the filter (200).

9. The filter structure for detecting filter lifespan according to claim 8, characterized in that, The light guide strip (400) is provided in multiple sets, and the multiple sets of light guide strips (400) are arranged parallel to each other and spaced apart; The first thermistor (311) and the second thermistor (321) are disposed between the light guide strip (400).

10. The filter structure for detecting filter lifespan according to claim 9, characterized in that, The first thermistor (311) and the second thermistor (321) are respectively disposed on the left and right sides of the middle part of the light guide strip (400).

Images