Air detection device with multi-layer filtering structure

Abstract

The utility model discloses an air detection device with a multilayer filter structure, which comprises the multilayer filter structure, an air detection gun body, a display, a switch and an air detection sensor, after the switch is pressed down, a fan at a muzzle is started to suck air, and after the air is purified by a pretreatment layer and a filter layer in a grading manner, the clean air enters the detection sensor; and detection data is displayed on a display in real time. According to the device, interferents such as large-particle impurities and microorganisms can be accurately intercepted through a multi-layer filtering structure, it is ensured that air entering the sensor only contains target detection components, and the data accuracy is greatly improved; the fan accelerates airflow circulation, and the detection period is shortened; the design of the gun body facilitates handheld operation and adapts to multiple scenes such as an indoor scene and a workshop scene, the filter layer is assembled in a modularized mode, loss parts can be replaced independently, disassembly and cleaning are convenient, the situation that follow-up detection is affected by impurity residues can be effectively avoided, the maintenance cost is reduced, and the dual value of efficient detection and convenient use is achieved.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection testing, specifically an air testing device with a multi-layer filtration structure. Background Technology

[0002] With industrial development and widespread indoor decoration, the types of pollutants in the air, such as particulate matter and VOCs, are becoming increasingly complex. Accurate air quality monitoring has become crucial for protecting human health and environmental safety. Air quality monitoring devices, as core tools for rapidly monitoring pollutant components, directly impact air quality assessments through their detection accuracy and efficiency. This is especially true in environments with stringent air cleanliness requirements, such as hospitals, laboratories, and newly renovated residences. These devices must effectively eliminate interference factors and provide reliable data support, thus placing higher demands on the rationality and functionality of their filtration structures.

[0003] The traditional air quality monitoring devices commonly used in the market today have many shortcomings: traditional devices mostly use single-layer filters or simple stacked structures, which cannot intercept pollutants of different particle sizes in stages. This can easily lead to large particles clogging precision filter media or tiny pollutants interfering with sensors, causing deviations in detection data; most filters are fixedly installed, requiring the entire device to be disassembled for cleaning or replacement, which is cumbersome and can easily damage internal components; some devices lack directional airflow design, resulting in low filtration efficiency in natural air intake mode, and uneven airflow distribution can easily create detection blind spots, making it difficult to meet the needs of rapid detection in complex environments. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an air detection device with a multi-layer filtration structure. The design is as follows: Upon activation, the device enters operation: a fan at the nozzle starts first, generating directional suction to draw outside air into the nozzle. The air first flows through a coarse filter layer located at the nozzle, where a honeycomb pre-filter performs initial treatment, intercepting large particles such as hair and paper scraps. The pre-filtered air then enters a pretreatment layer, passing sequentially through a corrugated metal mesh and electrostatic electret cotton. The corrugated metal mesh further filters medium-sized impurities, while the electrostatic electret cotton uses electrostatic adsorption to capture fine fibers and dust, completing the second stage of purification. The pre-treated air continues to flow under the fan's influence, entering a precision filter layer. An activated carbon filter adsorbs gaseous pollutants such as VOCs, while a HEPA filter deeply filters PM2.5, bacteria, and other fine particles, ultimately resulting in clean air. Clean air is fed into the air detection sensor at the bottom of the gun body. The sensor analyzes and detects the target detection components in the air. After the detection is completed, the air is discharged from the exhaust port on the side of the sensor. At the same time, the sensor transmits the detection data to the display on the outer surface of the gun head, displaying the detection results in real time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air detection device with a multi-layer filtration structure, comprising a gun body, wherein the gun body is a hollow cylindrical structure, an air detection sensor is mounted at the bottom, the inner wall of the top of the gun body is provided with an internal thread, and a gun head is connected by the thread, a display is embedded on the outer surface of the gun head, a switch is provided below the display, and a multi-layer filtration structure is integrated inside the gun head.

[0006] The multi-layer filtration structure includes a coarse filter layer located at the nozzle of the device. The inner walls of the coarse filter layer at both ends have grooves, and slide rails are connected to these grooves via sliding pairs. The slide rails are fixedly connected to a honeycomb primary filter screen. A fan is installed inside the coarse filter layer along the nozzle axis. A pretreatment layer is located behind the fan. The inner walls of the pretreatment layer also have grooves, and slide rails are slidably connected within these grooves. The slide rails are welded to the upper and lower ends of a corrugated metal mesh and electrostatic electret cotton, respectively. The corrugated metal mesh and electrostatic electret cotton are arranged in an alternating pattern inside the pretreatment layer. A precision filter layer is fixedly installed at the threaded connection to the inner wall of the downward-bending portion of the nozzle.

[0007] Furthermore, the precision filter layer uses a HEPA filter with an antibacterial coating sprayed onto its surface.

[0008] Furthermore, the top left and right sides of the coarse filter layer and the pretreatment layer are provided with sliding grooves, and the top left and right sides of the gun head are provided with sliding rails. The sliding groove at the top of the coarse filter layer extends to the sliding rail of the honeycomb primary filter.

[0009] Furthermore, the air detection sensor and the left and right sides of the bottom of the gun body are both provided with exhaust ports.

[0010] Furthermore, the honeycomb primary filter is injection molded from food-grade PP material, and its interior has a regular hexagonal honeycomb pore structure with honeycomb channels running through the airflow direction; the honeycomb primary filter is detachably slidably connected to the coarse filter layer via a slide rail.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0012] 1. Precise and efficient filtration ensures reliable test data. The multi-layered filtration structure achieves precise interception of pollutants through tiered processing: the honeycomb primary filter first blocks large particles; the pretreatment layer uses a combination of corrugated metal mesh and electrostatic electret cotton to filter medium-sized pollutants; and the precision filtration layer deeply purifies fine particles and gaseous pollutants, forming a progressively improving purification system. This tiered filtration method thoroughly eliminates different types of interfering substances, ensuring that the air entering the detection sensor contains only the target components, significantly reducing data deviations caused by impurities and providing accurate data support for air quality testing.

[0013] 2. Convenient and flexible operation and maintenance enhance the practical value of the device. Each filter layer adopts a detachable connection design with slide rails and grooves. Cleaning or replacement does not require disassembling the entire device; simply pulling out the corresponding component simplifies the maintenance process. The threaded connection structure between the gun body and the gun head facilitates overall disassembly and inspection, reducing maintenance difficulty. Simultaneously, the fan-driven directional airflow design accelerates air circulation, and combined with the handheld structure of the gun body, the device can adapt to the rapid testing needs of various scenarios such as indoors and workshops. This improves testing efficiency while extending the device's service life, balancing practicality and economy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an air detection device with a multi-layer filtration structure according to the present invention.

[0015] Figure 2 This is a schematic diagram of the coarse filter layer structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the pretreatment layer structure of this utility model.

[0017] In the diagram: 1. Gun body; 2. Air detection sensor; 3. Gun head; 4. Display; 5. Switch; 6. Multi-layer filter structure; 601. Coarse filter layer; 602. Honeycomb primary filter; 603. Fan; 604. Pre-treatment layer; 605. Corrugated metal mesh; 606. Electrostatic electret cotton; 607. Precision filter layer; 7. Exhaust port; 8. Sealing ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 This embodiment of an air detection device with a multi-layer filtration structure includes a gun body 1, which is a hollow cylindrical structure. An air detection sensor 2 is mounted at the bottom. The inner wall of the top of the gun body 1 is provided with an internal thread, which connects to a gun head 3. A display 4 is embedded on the outer surface of the gun head 3, and a switch 5 is provided below the display 4. The gun head 3 integrates a multi-layer filtration structure 6.

[0020] The multi-layer filtration structure 6 includes a coarse filter layer 601 located at the nozzle of the device. The inner walls of the upper and lower ends of the coarse filter layer 601 are provided with grooves, and slide rails are connected to the grooves via sliding pairs. The slide rails are fixedly connected to a honeycomb primary filter screen 602. A fan 603 is installed inside the coarse filter layer 601 along the axis of the nozzle 3. A pretreatment layer 604 is located behind the fan 603. The upper and lower inner walls of the pretreatment layer 604 are also provided with grooves, and slide rails are slidably connected within the grooves. The slide rails are welded to the upper and lower ends of a corrugated metal mesh 605 and an electrostatic electret cotton 606, respectively. The corrugated metal mesh 605 and the electrostatic electret cotton 606 are arranged in an alternating pattern inside the pretreatment layer 604. A precision filter layer 607 is fixedly installed on the threaded inner wall of the downward-bending portion of the nozzle 3.

[0021] The honeycomb primary filter 602 and the coarse filter layer 601 are detachably slidably connected by slide rails and grooves. It is made of food-grade PP material and injection molded into a regular hexagonal honeycomb pore structure with channels running through the airflow direction. This structure can not only reduce wind resistance by increasing the ventilation cross-sectional area to reduce the energy consumption of the fan 603, but also efficiently capture large particulate impurities such as hair, fibers, and paper scraps by using the grid interception principle. At the same time, the three-dimensional support of the honeycomb structure can prevent the filter from deforming due to airflow impact. As the first barrier of pretreatment, it reduces the burden on the subsequent filter layers. The modular design makes it easy to disassemble and clean, which is in line with the easy maintenance characteristics of the device.

[0022] The top left and right sides of the coarse filter layer 601 and the pretreatment layer 604 are provided with sliding grooves, and the top left and right sides of the gun head 3 are provided with sliding rails. The sliding groove at the top of the coarse filter layer 601 extends to the sliding rail of the honeycomb primary filter 602. This structural design makes the connection between the coarse filter layer 601, the pretreatment layer 604 and the gun head 3 more stable, and at the same time facilitates the installation and disassembly of each layer, providing convenience for maintenance operations.

[0023] The precision filter layer 607 uses a HEPA filter with an antibacterial coating on its surface. This structure effectively filters fine particles while inhibiting the growth and reproduction of bacteria and viruses on the filter, avoiding secondary pollution and ensuring the cleanliness of the filtered air.

[0024] The air detection sensor 2 and the gun body 1 are both equipped with exhaust ports 7 on the left and right sides of the bottom. The dual exhaust port 7 design speeds up the exhaust speed of the air after detection, avoids the air from lingering in the device and affecting the detection efficiency, and makes the airflow circulation smoother.

[0025] A sealing ring 8 is provided at the threaded connection between the gun head 3 and the gun body 1, and the bending angle of the gun head 3 is 90°. The inner wall of the bending part is a smooth transition curved surface. The sealing ring 8 enhances the sealing of the connection and prevents unfiltered air from entering the device and affecting the test results. The 90° bending angle, combined with the inner wall design of the smooth transition curved surface, reduces the airflow resistance at the bending point and ensures smooth airflow.

[0026] In summary, this air detection device with a multi-layered filtration structure features an ingenious design, with each component working in concert to form a complete and efficient air detection system. The core filtration component consists of multiple layers: the honeycomb pre-filter and coarse filter layer are connected by a detachable sliding connection, ensuring both stability and ease of cleaning; the coarse filter layer, pretreatment layer, and nozzle are connected by sliding grooves and rails, facilitating easy assembly and disassembly; the precision filter layer uses a HEPA filter with an antibacterial coating; the air detection sensor and the bottom of the nozzle have dual exhaust ports to promptly expel detected air; a sealing ring is installed at the connection between the nozzle and the nozzle body to ensure a tight seal, and the nozzle employs a specific bending design to ensure smooth airflow.

[0027] This device boasts significant advantages. In terms of filtration efficiency, its multi-layered structure progressively filters out large particles, the pre-treatment layer filters medium-sized pollutants, and the precision filtration layer, combined with an antibacterial coating, filters out tiny particles and inhibits microbial growth, preventing secondary contamination and laying the foundation for accurate test data. Regarding operation and maintenance, the detachable structure simplifies installation and disassembly, allowing ordinary operators to clean or replace components, reducing maintenance difficulty and costs. In terms of testing efficiency, dual exhaust ports accelerate air expulsion, and the nozzle design reduces airflow resistance, improving overall testing efficiency. In summary, it can meet the air testing needs of various scenarios and has high practical value.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air detection device with a multi-layer filtering structure, comprising a gun body (1), characterized in that: The gun body (1) is a hollow cylindrical structure, with an air detection sensor (2) mounted at the bottom. The inner wall of the top of the gun body (1) is provided with an internal thread, which connects to the gun head (3). The outer surface of the gun head (3) is embedded with a display (4), and a switch (5) is provided below the display (4). The gun head (3) integrates a multi-layer filter structure (6). The multi-layer filtration structure (6) includes a coarse filter layer (601), which is located at the nozzle of the device. The inner walls of the upper and lower ends of the coarse filter layer (601) are provided with grooves. The grooves are connected to slide rails through sliding pairs. The slide rails are fixedly connected to honeycomb primary filter screens (602). A fan (603) is installed inside the coarse filter layer (601) along the axis of the nozzle (3). A pretreatment layer (604) is provided behind the fan (603). The upper and lower inner walls of the pretreatment layer (604) are also provided with grooves. The slide rails are slidably connected in the grooves. The slide rails are welded to the upper and lower ends of the corrugated metal mesh (605) and the electrostatic electret cotton (606), respectively. The corrugated metal mesh (605) and the electrostatic electret cotton (606) are arranged in an alternating pattern inside the pretreatment layer (604). A precision filter layer (607) is fixedly installed at the threaded connection inner wall of the downward bending part of the nozzle (3).

2. The air detection device with multi-layer filtering structure according to claim 1, characterized in that: The precision filter layer (607) uses a HEPA filter with an antibacterial coating on the surface, which can inhibit the growth and reproduction of bacteria and viruses on the filter and avoid secondary pollution.

3. The air detection device with multi-layer filtering structure according to claim 1, characterized in that: The top left and right sides of the coarse filter layer (601) and the pretreatment layer (604) are provided with sliding grooves, and the top left and right sides of the gun head (3) are provided with sliding rails. The sliding groove at the top of the coarse filter layer (601) extends to the sliding rail of the honeycomb primary filter (602).

4. The air detection device with multi-layer filtering structure according to claim 1, characterized in that: The air detection sensor (2) and the bottom left and right sides of the gun body (1) are both provided with exhaust ports (7).

5. The air detection device with multi-layer filtering structure according to claim 1, characterized in that: The honeycomb primary filter (602) is injection molded from food-grade PP material. Its interior has a regular hexagonal honeycomb pore structure, and the honeycomb channels are connected along the airflow direction. The honeycomb primary filter (602) is detachably slidably connected to the coarse filter layer (601) through a slide rail. When the filter needs to be cleaned or replaced, it can be pulled out along the slide rail.

6. The air detection device with multi-layer filtering structure according to claim 1, characterized in that: The threaded connection between the gun head (3) and the gun body (1) is provided with a sealing ring (8), and the bending angle of the gun head (3) is 90°, and the inner wall of the bending part is a smooth transition surface.

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