An air sampler for indoor environmental monitoring

Abstract

This utility model belongs to the field of indoor environmental testing, specifically an air sampler for indoor environmental testing, including a negative pressure tube. A drive motor is installed at the top of the negative pressure tube, and the output end of the drive motor passes through the top of the negative pressure tube and is fixedly connected to a negative pressure impeller. A vent hole and a fixing hole are opened at the top of the negative pressure tube, and a gas storage tank is connected to the surface of the fixing hole. An arc-shaped groove is opened on one side of the top of the negative pressure tube, and a circular frame is slidably connected inside the arc-shaped groove. Through the structural design of the negative pressure tube, drive motor, and negative pressure impeller, efficient negative pressure sampling of indoor air is achieved, and the gas can be stably delivered to the gas storage tank. This solves the problem of dust and impurities affecting the accuracy of gas detection in traditional sampling processes. The combination of the arc-shaped groove, circular frame, and filter screen effectively filters dust and impurities in the inhaled air, improving the purity of the gas sample and the reliability of the detection data.

Description

Technical Field

[0001] This utility model relates to the field of indoor environmental testing, specifically an air sampler for indoor environmental testing. Background Technology

[0002] Indoor environmental testing refers to the process of monitoring and evaluating parameters such as indoor air quality, temperature, humidity, and light intensity. This testing aims to ensure that the indoor environment meets health, comfort, and safety standards to protect the health and comfort of residents, staff, and other people engaged in indoor activities. Air quality testing is one of the core components of indoor environmental testing. Air quality testing includes monitoring and evaluating the concentration of various pollutants in the air (such as formaldehyde, volatile organic compounds, nitrogen oxides, and particulate matter), as well as assessing indoor ventilation. This type of testing requires the use of indoor environmental air samplers.

[0003] In the prior art, such as in the patent announcement number CN223192643U, an air sampler for indoor environmental testing is disclosed. It includes a fixed platform, a hydraulic rod fixedly connected to the side wall of the fixed platform, a slide table fixedly connected to the output end of the hydraulic rod, a slide rail fixedly connected to the side wall of the fixed platform, the slide table slidably connected to the side wall of the slide rail, an inclined plate fixedly connected to the side wall of the fixed platform, a support platform fixedly connected to one side wall of the slide table, a connecting column rotatably connected inside the support platform, a connecting plate fixedly connected to the bottom of the connecting column, a pulley rotatably connected inside the connecting plate, and a sampling head fixedly connected to the top of the connecting column. While the aforementioned patent achieves the movement and rotation of the sampling head through the cooperation of structures such as slide rails, support platforms, and inclined plates, thereby expanding the sampling range of the sampling head and making the sampling structure more diverse, resulting in more accurate indoor air quality detection and assessment, the indoor environmental air detection requires gas collection and sampling. During the collection process, dust and various impurities in the indoor gas are also collected, and the presence of these impurities affects the accuracy of the overall gas detection data. Therefore, to address the above problems, an air sampler for indoor environmental detection is proposed. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, indoor air quality testing requires gas collection and sampling. During the collection process, dust and various impurities in the indoor air are also collected. The presence of these impurities affects the accuracy of the overall gas detection data. This invention proposes an air sampler for indoor environmental testing.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: An air sampler for indoor environmental testing, comprising a negative pressure tube; a drive motor is provided at the top of the negative pressure tube, the output end of the drive motor passes through the top of the negative pressure tube and is fixedly connected to a negative pressure impeller, a vent hole and a fixing hole are provided at the top of the negative pressure tube, an air storage tank is connected to the surface of the fixing hole, an arc-shaped groove is provided on one side of the top of the negative pressure tube, a circular frame is slidably connected inside the arc-shaped groove, a filter screen is provided inside the circular frame; an arc-shaped plate is provided on the bottom edge of the surface of the arc-shaped groove, an elastic scraper is provided on the edge of the surface of the arc-shaped plate, an arc-shaped receiving box is provided on the side of the negative pressure tube and below the arc-shaped plate, and a leakage groove is provided on the surface of the arc-shaped plate.

[0006] Preferably, the bottom end of the negative pressure pipe is provided with a tapered tube, and the tapered tube is narrow at the top and wide at the bottom.

[0007] Preferably, one end of the gas storage tank is connected to a delivery pipe, and a shut-off valve is provided on the surface of the delivery pipe.

[0008] Preferably, the top of the negative pressure pipe has a vent hole on one side of the drive motor and a fixing hole on the other side of the drive motor.

[0009] Preferably, the elastic scraper provided at the edge of the arc-shaped plate surface is in contact with the filter screen surface.

[0010] Preferably, the groove is formed on the surface of the arc-shaped plate and located on one side of the elastic scraper.

[0011] The advantages of this utility model are: 1. This utility model achieves efficient negative pressure sampling of indoor air through the structural design of negative pressure tube, drive motor and negative pressure impeller. It can stably deliver gas to the gas storage tank and solve the problem of dust and impurities affecting the accuracy of gas detection in the traditional sampling process. Through the cooperation of arc groove, circular frame and filter screen, it achieves effective filtration of dust and impurities in the inhaled air, improves the purity of gas sample and the reliability of detection data. 2. This utility model, through the structural design of an arc-shaped plate, an elastic scraper, a trough, and an arc-shaped receiving box, realizes the function of automatically scraping off the attached dust during the disassembly of the filter screen. The dust falls into the receiving box through the trough, thereby completing rapid cleaning and maintenance and improving the efficiency and stability of the sampler's continuous operation. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the negative pressure pipe structure of this utility model; Figure 3 This is a schematic diagram of the gas storage tank structure of this utility model; Figure 4 This is a schematic diagram of the circular frame and arc-shaped receiving box structure of this utility model.

[0014] In the diagram: 1. Negative pressure pipe; 2. Drive motor; 3. Negative pressure impeller; 4. Vent hole; 5. Fixing hole; 6. Air tank; 7. Arc-shaped groove; 8. Circular frame; 9. Filter screen; 10. Arc-shaped plate; 11. Elastic scraper; 12. Arc-shaped receiving box; 13. Slot; 14. Conical pipe; 15. Conveying pipe; 16. Shut-off valve. Detailed Implementation

[0015] 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 scope of protection of the present utility model.

[0016] Please see Figures 1-4 As shown, an air sampler for indoor environmental monitoring includes a negative pressure tube 1; a drive motor 2 is installed at the top of the negative pressure tube 1, the output end of the drive motor 2 passes through the top of the negative pressure tube 1 and is fixedly connected to a negative pressure impeller 3, a vent hole 4 and a fixing hole 5 are opened at the top of the negative pressure tube 1, an air storage tank 6 is connected to the surface of the fixing hole 5, an arc-shaped groove 7 is opened on one side of the top of the negative pressure tube 1, a circular frame 8 is slidably connected inside the arc-shaped groove 7, a filter screen 9 is installed inside the circular frame 8, an arc-shaped plate 10 is installed on the bottom edge of the surface of the arc-shaped groove 7, an elastic scraper 11 is installed on the edge of the surface of the arc-shaped plate 10, an arc-shaped receiving box 12 is installed on the side of the negative pressure tube 1 and below the arc-shaped plate 10, and a leakage groove 13 is opened on the surface of the arc-shaped plate 10. During operation, the drive motor 2 drives the negative pressure impeller 3 to rotate at high speed, creating a negative pressure in the negative pressure pipe 1, drawing in outside air. The drawn-in air first passes through the filter screen 9 for filtration, trapping dust and other impurities, while the clean air enters the gas storage tank 6 through the fixing hole 5. When the filter screen 9 needs cleaning, the circular frame 8 is slid out along the arc-shaped groove 7. During this process, the surface of the filter screen 9 scrapes against the elastic scraper 11, and the scraped-off dust falls through the trough 13 into the arc-shaped receiving box 12 below, thus achieving rapid cleaning and maintenance. Through the structure of the negative pressure impeller 3 and the filter screen 9, efficient sampling and preliminary filtration are achieved, ensuring the purity of the gas sample. Through the cooperation of the elastic scraper 11, the trough 13, and the arc-shaped receiving box 12, the cleaning of the filter screen 9 is automatically completed during disassembly and maintenance, improving maintenance efficiency and maintaining the continuous working capability of the sampler.

[0017] Furthermore, a tapered tube 14 is provided at the bottom end of the negative pressure tube 1, and the tapered tube 14 is narrow at the top and wide at the bottom; During operation, the wide opening of the conical tube 14 is set downward, which increases the air intake area and makes sampling more efficient. The structural design of the conical tube 14 expands the sampling inlet and increases the amount of air sampled per unit time, thereby improving the sampling efficiency.

[0018] Furthermore, one end of the gas storage tank 6 is connected to a delivery pipe 15, and a shut-off valve 16 is provided on the surface of the delivery pipe 15. During operation, after the sampled gas is stored in the gas storage tank 6, the gas sample can be transported to the analysis equipment through the delivery pipe 15 by opening the shut-off valve 16. The structure of the delivery pipe 15 and the shut-off valve 16 facilitates the controlled delivery and sampling of the stored gas sample, improving the convenience and practicality of operation.

[0019] Furthermore, a vent hole 4 is provided on the top of the negative pressure pipe 1 on one side of the drive motor 2, and a fixing hole 5 is provided on the other side of the drive motor 2. During operation, the vent 4 is used to maintain the internal air pressure balance of the negative pressure pipe 1, while the fixed hole 5 is used to introduce the filtered clean air into the air storage tank 6. The separate design of the vent 4 and the fixed hole 5 optimizes the airflow path, ensuring the stable formation of negative pressure and the effective delivery of clean gas.

[0020] Furthermore, the elastic scraper 11 disposed at the edge of the surface of the arc plate 10 contacts the surface of the filter screen 9; During operation, the elastic scraper 11 is made of a material with a certain degree of elasticity, so that it can closely adhere to the surface of the filter screen 9 as it slides over it.

[0021] Furthermore, the groove 13 is formed on the surface of the arc plate 10 and located on one side of the elastic scraper 11; During operation, the scraped dust moves along the surface of the arc-shaped plate 10 and falls from the trough 13 located on one side of the elastic scraper 11. The trough 13 provides a directional discharge channel for the scraped dust, allowing it to fall accurately into the arc-shaped receiving box 12, thus avoiding secondary pollution.

[0022] Working principle: The drive motor 2 starts and drives the negative pressure impeller 3 to rotate, forming a negative pressure in the negative pressure pipe 1. Outside air is drawn in through the conical pipe 14. Dust and impurities in the air are intercepted by the filter screen 9, and clean air enters the gas storage tank 6 through the fixed hole 5 for storage. When cleaning is required, the circular frame 8 is slid out so that the filter screen 9 is scraped off by the elastic scraper 11. The scraped dust falls into the arc-shaped receiving box 12 through the trough 13 to complete the cleaning. Finally, the stored gas sample can be output through the delivery pipe 15 by opening the shut-off valve 16.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air sampler for indoor environment detection, characterized by: Includes a negative pressure pipe (1); a drive motor (2) is provided at the top of the negative pressure pipe (1), the output end of the drive motor (2) passes through the top of the negative pressure pipe (1) and is fixedly connected to a negative pressure impeller (3), a vent hole (4) and a fixing hole (5) are provided at the top of the negative pressure pipe (1), a gas storage tank (6) is connected to the surface of the fixing hole (5), an arc groove (7) is provided on one side of the top of the negative pressure pipe (1), a circular frame (8) is slidably connected inside the arc groove (7), and a filter screen (9) is provided inside the circular frame (8); An arc plate (10) is provided on the bottom edge of the arc groove (7), an elastic scraper (11) is provided on the edge of the arc plate (10), an arc receiving box (12) is provided on the side of the negative pressure pipe (1) and below the arc plate (10), and a trough (13) is provided on the surface of the arc plate (10).

2. The air sampler for indoor environment detection according to claim 1, characterized in that: The bottom end of the negative pressure pipe (1) is provided with a tapered pipe (14), and the tapered pipe (14) is narrow at the top and wide at the bottom.

3. The air sampler for indoor environment detection according to claim 1, characterized in that: One end of the gas storage tank (6) is connected to a delivery pipe (15), and a shut-off valve (16) is provided on the surface of the delivery pipe (15).

4. The air sampler for indoor environment detection according to claim 1, characterized in that: The top of the negative pressure pipe (1) has a vent hole (4) on one side of the drive motor (2) and a fixing hole (5) on the other side of the drive motor (2).

5. The air sampler for indoor environment detection according to claim 1, characterized in that: The elastic scraper (11) provided on the edge of the surface of the arc plate (10) contacts the surface of the filter screen (9).

6. The air sampler for indoor environment detection according to claim 1, characterized in that: The groove (13) is formed on the surface of the arc plate (10) and located on one side of the elastic scraper (11).

Images