Ambient air sampling device

Abstract

The utility model relates to an ambient air sampling device, which comprises a movable base, an air inlet, an air outlet, an air inlet and an air outlet, and is characterized in that the movable base is constructed to at least carry a particle sampler; the bracket is vertically arranged on the movable base and is provided with an adjustable height; the sampling frame is arranged at the top end of the bracket; the sampling frame comprises a pore plate and a carrying disc; the pore plate is used for carrying a planktonic bacteria sampler; the carrying disc is fixed on a supporting piece extending upwards from the pore plate and is used for carrying a settling bacteria culture dish. The ambient air sampling device disclosed by the utility model can integrate three instruments and equipment for monitoring three air evaluation indexes of suspended particles, settling bacteria and floating bacteria, so that the three instruments and equipment can be uniformly and conveniently moved and arranged; compared with the prior art of respectively moving and arranging three sets of independent instruments and equipment, the hardware structure and the arrangement operation are simplified, and the air sampling and monitoring efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ambient air monitoring, and more particularly to an ambient air sampling device for collecting samples from ambient air to monitor air quality. Background Art

[0002] Industries such as biopharmaceuticals and food processing and manufacturing need to maintain a clean production environment during the product production process to prevent their products from being contaminated. To this end, it is necessary to set up certain clean areas and conduct very strict environmental monitoring and control in these areas. Among them, monitoring of ambient air quality is particularly important and is a key link in ensuring the quality, safety and effectiveness of products such as medicines.

[0003] Common indicators used to evaluate air quality or cleanliness include suspended particulate matter, settling bacteria, and airborne bacteria. Suspended particulate matter is generally measured using the counting concentration method, primarily using a particle sampler such as a light scattering particle counter or laser particle counter. The particle sampler is continuously moved and placed at multiple designated locations for measurement, enabling on-site readings. The final evaluation result is then calculated based on the average of the points and a 95% confidence interval. Airborne bacteria are also commonly measured using the counting concentration method, primarily using an airborne bacteria sampler. This sampler is also placed at various designated locations and uses an impaction method to aspirate and collect a defined volume of air. Airborne bacteria are trapped on a culture medium by impaction, and the total number of colonies is calculated after several days of incubation. Settling bacteria are measured using the natural sedimentation method, where a culture dish is placed at a designated location for several hours, allowing the airborne bacteria to settle naturally due to gravity. The total number of colonies is then calculated after several days of incubation.

[0004] It can be seen that in the existing technology of environmental air sampling and monitoring, different instruments and equipment are used to monitor the three air evaluation indicators of suspended particles, settling bacteria and planktonic bacteria, and it is often necessary to move and arrange three sets of instruments and equipment separately for multiple different points, resulting in a complex overall hardware structure and cumbersome and inconvenient operation, which makes the efficiency of air sampling and monitoring low. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the above problems and / or other defects in the prior art.

[0006] To achieve the above-mentioned objectives, the utility model provides an ambient air sampling device, which includes: a movable base, which is configured to carry at least a particle sampler; a bracket erected on the movable base and having an adjustable height; and a sampling rack arranged at the top end of the bracket, the sampling rack including a perforated plate for carrying the planktonic bacteria sampler and a loading tray fixed on a support member extending upward from the perforated plate and for carrying a sedimentation bacteria culture dish.

[0007] According to an embodiment of the present invention, the bracket includes a first column and a second column which are nested with each other and can be telescopic relative to each other.

[0008] According to one embodiment of the present invention, the second column is a tubular column mounted on the outer circumference of the first column and includes a pipe mouth with a shrinkable diameter. The bracket also includes a locking nut that cooperates with the pipe mouth to adjust the degree of shrinkage of the pipe mouth.

[0009] According to an embodiment of the present invention, the support member is an annular circumferential wall extending upward along the periphery of the orifice plate, and the loading tray is fixed on the radial outer side of the annular circumferential wall.

[0010] According to an embodiment of the present invention, the sampling rack further comprises a collar fixed on the radially outer surface of the annular circumferential wall to hold the sampling head of the particle sampler.

[0011] According to an embodiment of the present invention, the collar is fixed on the radially outer surface of the annular circumferential wall at a position radially opposite to the loading plate.

[0012] According to one embodiment of the present invention, the sampling rack further includes a storage base fixed at the top end of the bracket and a plurality of support rods extending upward from the periphery of the storage base and spaced apart from each other in the circumferential direction, each support rod being fixed at both ends to the orifice plate and the storage base to separate the orifice plate and the storage base by a predetermined height.

[0013] According to one embodiment of the present invention, the movable base is equipped with a plurality of silent rollers.

[0014] The ambient air sampling device of the present invention integrates three instruments and equipment used to monitor three air evaluation indicators: suspended particles, settling bacteria, and planktonic bacteria. This allows the three instruments and equipment to be conveniently moved and arranged in a unified manner. Compared to the original method of moving and arranging three independent sets of instruments and equipment, this simplifies the hardware structure and layout operations, and improves the efficiency of air sampling and monitoring. In addition, the ambient air sampling device of the present invention can conveniently adjust the sampling height, flexibly adapting to different process operation requirements and environmental conditions, bringing a brand new air sampling experience to operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limiting the present invention, wherein:

[0016] Figure 1 Schematic diagram of an ambient air sampling device according to one embodiment of the present invention.

[0017] Description of reference numerals:

[0018] 1. Mobile base; 11. Silent roller; 2. Bracket; 21. First column; 22. Second column; 23. Locking nut; 3. Sampling rack; 31. Orifice plate; 32. Support; 33. Loading tray; 34. Ring; 35. Storage base; 36. Support rod; 5. Particle sampler; 51. Sampling head; 52. Sampling tube; 6. Sedimentation bacteria culture dish. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented without some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be considered as elements or limitations of the claims unless expressly set forth in the claims.

[0020] Figure 1 The ambient air sampling device according to one embodiment of the present invention is schematically shown. The ambient air sampling device can be moved and arranged as a whole, and for this purpose it includes a movable base 1 for carrying and moving the entire device. In particular, Figure 1 As shown, the mobile base 1 is configured to carry a particle sampler 5 for collecting and measuring suspended particles in ambient air. This allows the sampler 5 to be conveniently moved to designated locations. This significantly reduces labor costs and improves efficiency compared to the prior art, where operators laboriously carry heavy particle samplers. Advantageously, the mobile base 1 can be equipped with multiple silent rollers 11 to enhance transport comfort.

[0021] In addition to the particle sampler, the mobile base 1 can also carry instruments and equipment for sampling and measuring airborne and settling bacteria in the ambient air. To this end, the mobile base 1 can be configured with a bracket 2 and a sampling rack 3 disposed at the top of the bracket 2 and supported by the bracket 2. The sampling rack 3 is configured to carry instruments and equipment for sampling and measuring airborne and settling bacteria in the ambient air.

[0022] More specifically, the sampling rack 3 may include a well plate 31 for carrying a planktonic bacteria sampler (not shown). Figure 1 As shown, the orifice plate 31 is made of, for example, stainless steel and may have a diameter of, for example, about 20 cm. A plurality of through holes are provided on the orifice plate 31 so that after the airborne bacteria sampler carried by the orifice plate 31 collects ambient air by suction and intercepts airborne bacteria in the air, the air leaving the airborne bacteria sampler can pass smoothly through the through holes on the orifice plate without being blocked by the orifice plate. In addition, a support member 32 may be provided on the orifice plate 31, the function of which is to support a carrier plate 33 for carrying a sedimentation bacteria culture dish 6. The carrier plate 33 may be fixed to the support member 32 by, for example, welding, and may be, for example, in the shape of a disc with a diameter of about 10 cm. In the illustrated embodiment, the support member 32 is in the form of an annular circumferential wall extending upward along the periphery of the orifice plate 31, and the carrier plate 33 is fixed on the radial outer surface of the annular circumferential wall. The support member 32 in the form of an annular circumferential wall has high strength and stability, and allows sufficient flexibility in the fixing position of the carrier plate 33. Of course, the configuration of the support member 32 is not limited thereto, but may be in any form that can fix or support the loading tray 33 . For example, the support member 32 may also be in the form of a simple support rod or a hollow frame.

[0023] Optionally, a collar 34 may be fixed to the support member 32, which is configured to hold the generally funnel-shaped sampling head 51 of the particle sampler 5 through a through hole therein. For example, the collar 34 has an outer diameter of approximately 10 cm and an inner diameter of approximately 5 cm (i.e., the diameter of the through hole). The sampling head 51 is connected to the instrument body of the particle sampler 5, which is directly placed on the mobile base 1, via a sampling tube 52 (e.g., a hose approximately 100 cm long). In the prior art, the sampling head 51 and sampling tube 52 of the particle sampler 5 are generally held by being tied to separate support rods using specialized cable ties. This makes it difficult to maintain the sampling head in an upright position with the opening facing upward, and the sampling tube is easily deformed, resulting in a sluggish airflow. The collar 34 can reliably maintain the sampling head 51 in the desired position, while allowing the sampling tube 52 to dangle without deformation to ensure smooth airflow. In one embodiment, the collar 34 is also fixed on the radial outer surface of the annular support member 32 and is located radially opposite to the sample tray 33, so as to maintain balanced force and stability of the support member 32 and the entire sampling rack 3.

[0024] The orifice plate 31 can be directly or as Figure 1 As shown, it is indirectly fixed at the top end of the bracket 2. Specifically, as Figure 1 As shown, the sampling rack 3 may also include a storage base plate 35 fixed at the top of the bracket 2 and a plurality of support rods 36 extending upward from the periphery of the storage base plate 35. The two ends of each support rod 36 are respectively fixed to the orifice plate 31 and the storage base plate 35, whereby the orifice plate 31 is indirectly fixed to the top of the bracket 2 through the plurality of support rods 36 and the storage base plate 35. The support rods 36 are spaced apart from each other in the circumferential direction, and space the orifice plate 31 and the storage base plate 35 apart by a predetermined height. Thus, there is a space between the orifice plate 31 and the storage base plate 35 that can be reached from the circumferential gap between any two adjacent support rods 36, and the space can be used as a storage space, for example, for storing used or unused culture dishes for collecting and culturing settled bacteria or floating bacteria, or other objects or devices required for ambient air sampling. Thus, as Figure 1 As shown, the entire sampling rack 3 has a layered configuration. The upper layer (perforated plate 31) is used to hold the airborne bacteria sampler, while the lower layer (storage base 35) is used to store various items as needed. The entire sampling rack 3 can be, for example, approximately 30 cm in height, and the height between the upper and lower layers can be pre-set as needed.

[0025] In the present invention, the bracket 2 is erected on the mobile base 1 and is constructed to have an adjustable height, so that the height of the sampling rack 3 set on the top of the bracket 2 can also be adjusted. This means that the height of the orifice plate 31, the loading tray 33 and the collar 34 on the sampling rack 3 can also be adjusted, thereby making it possible to adjust the sampling height of planktonic bacteria, sedimentation bacteria and suspended particles. Generally speaking, the sampling point for ambient air monitoring should be set at a working height of 0.8 to 1.5 meters from the ground so as to more accurately reflect the contamination of microorganisms and particulate matter caused by the operator's operation. However, the operating height of some processes is higher or lower than the general operating height. For example, when material transfer is carried out, the operating height is often lower than 0.8m. The above-mentioned height adjustability of the bracket 2 and the sampling rack 3 can be flexibly adapted to different process operation requirements and environmental conditions.

[0026] According to an exemplary simple configuration of the bracket 2, it may include a first column 21 and a second column 22 that are nested with each other and can be telescopic relative to each other. Figure 1In the illustrated embodiment, the second column 22 is a tubular column mounted on the outer circumference of the first column 21. The expansion and contraction of the first and second columns 21, 22 relative to each other can be achieved through a variety of configurations. For example, the second column 22 may include a nozzle with a retractable diameter (for example, this expansion can be achieved by constructing a plurality of circumferentially spaced protrusions at the nozzle). A locking nut 23 is mounted on the outer surface of the nozzle, and the degree of expansion and contraction of the nozzle can be adjusted by rotating the locking nut 23. When the locking nut 23 is loosened, the nozzle diameter is larger, creating a gap between the nozzle and the outer circumference of the first column 21, making it easier to adjust the expansion and contraction between the first and second columns. When the locking nut 23 is tightened, the nozzle diameter is contracted and pressed against the outer circumference of the first column 21, locking the first and second columns together. This configuration using the locking nut 23 allows for continuous and stepless adjustment of the expansion and contraction between the first and second columns. In another embodiment, a plurality of first through holes with different heights may be provided on one of the first and second columns 21 and 22, and a second through hole may be provided on the other, and the adjusted telescopic extent of the first and second columns relative to each other may be locked by a pin that passes through both the second through hole and a selected one of the first through holes.

[0027] As described above, the ambient air sampling device according to the present invention can integrate three instruments and equipment used to monitor three air evaluation indicators: suspended particles, settling bacteria, and planktonic bacteria. This allows the three instruments and equipment to be conveniently moved and arranged in a unified manner. Compared with the original method of moving and arranging three independent sets of instruments and equipment, the hardware structure and arrangement operation are simplified, and the efficiency of air sampling and monitoring is improved. In addition, the ambient air sampling device according to the present invention can conveniently adjust the sampling height and flexibly adapt to different process operation requirements and environmental conditions, bringing a new air sampling experience to the operator.

[0028] It will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Other embodiments of the present invention will be apparent to those skilled in the art from the practice of the present invention disclosed herein. This specification and the examples disclosed herein should be considered as illustrative only, and the true scope of the present invention is indicated by the appended claims and their equivalents.

Claims

1. An ambient air sampling device, characterized in that include: A mobile base (1) configured to carry at least a particle sampler (5); A bracket (2) erected on the movable base (1) and having an adjustable height; and A sampling rack (3) is arranged at the top end of the support (2), and the sampling rack includes a hole plate (31) for carrying a planktonic bacteria sampler and a loading tray (33) fixed on a support (32) extending upward from the hole plate and used for carrying a sedimentation bacteria culture dish (6).

2. The ambient air sampling device according to claim 1, characterized in that The bracket (2) comprises a first column (21) and a second column (22) which are nested with each other and can be telescoped relative to each other.

3. The ambient air sampling device according to claim 2, characterized in that The second column (22) is a tubular column mounted on the outer peripheral surface of the first column (21) and includes a pipe mouth with a shrinkable diameter. The bracket (2) also includes a locking nut (23) that cooperates with the pipe mouth to adjust the shrinkage degree of the pipe mouth.

4. The ambient air sampling device according to claim 1, characterized in that The support member (32) is an annular peripheral wall extending upward along the periphery of the orifice plate (31), and the loading plate (33) is fixed on the radial outer side of the annular peripheral wall.

5. The ambient air sampling device according to claim 4, characterized in that The sampling rack (3) also includes a collar (34) fixed on the radially outer side of the annular peripheral wall to hold a sampling head of the particle sampler (5).

6. The ambient air sampling device according to claim 5, characterized in that The collar (34) is fixed on the radially outer surface of the annular peripheral wall at a position radially opposite to the object carrier (33).

7. The ambient air sampling device according to any one of claims 1 to 6, characterized in that The sampling rack (3) further comprises a storage base plate (35) fixed at the top end of the bracket (2) and a plurality of support rods (36) extending upward from the periphery of the storage base plate and spaced apart from each other in the circumferential direction, each support rod being fixed at both ends to the orifice plate (31) and the storage base plate (35) respectively so as to space the orifice plate and the storage base plate apart by a predetermined height.

8. The ambient air sampling device according to any one of claims 1 to 6, characterized in that The movable base (1) is equipped with a plurality of silent rollers (11).

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