Air sampler

Abstract

The utility model discloses an air sampler which comprises a supporting mechanism, an air exhaust mechanism, a sampling piece, a collecting piece and a sealing piece, wherein the air exhaust mechanism is fixedly arranged on the top surface of the supporting mechanism; a first air inlet is formed in the air exhaust mechanism, and the sealing piece is arranged between the sampling piece and the first air inlet; the sampling piece is of a hollow thin-wall structure with an opening in the top and sequentially comprises a first cylindrical part, a first conical part, a second cylindrical part, a second conical part and a third cylindrical part which are integrally formed and connected from top to bottom; the side wall of the first cylindrical part extends outwards to form a second air inlet, a top opening of the first cylindrical part forms a first air outlet, the first air outlet is correspondingly connected with the first air inlet, a bottom outlet of the third cylindrical part forms a second air outlet, and the collecting piece is connected to the second air outlet; through the reasonable structural design of the sampling piece, the spiral speed of air in the sampling piece is increased, so that the sampling rate of the sampler is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to air sampling technical field especially relates to an air sampler. BACKGROUND

[0002] In the closed space, the monitoring of air quality is very important. For example, large shopping malls, cinemas, hospitals and breeding farms and other closed environments with high density of people or animals. The concentration of microorganisms in the environment has a great impact on the health of people or animals, and we need certain means to monitor the content of microorganisms in the environment and take timely and reasonable measures to ensure the life and health safety of people or animals.

[0003] For example, in the breeding farm, the detection of air microorganisms such as African swine fever virus, blue ear virus and streptococcus suis in the breeding farm is a very important and necessary work process. The detection of air microorganisms can determine whether there are pathogenic microorganisms in the air that cause animal diseases, and then take killing measures to avoid the infection of pathogenic microorganisms in the breeding farm to cause economic losses to the breeding farm.

[0004] However, the existing air sampler has a low sampling rate of microorganisms in the air, which reduces the accuracy of microorganism detection and even gets unreliable and wrong experimental detection results. Therefore, it is necessary to design an air sampler with high sampling rate. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an air sampler to solve the problems in the prior art, that is, to provide an air sampler with high sampling rate to ensure the accuracy of air microorganism detection results.

[0006] Therefore, the utility model adopts the following technical scheme:

[0007] An air sampler comprises a supporting mechanism, an air extraction mechanism, a sampling piece, a collecting piece and a sealing piece. The air extraction mechanism is fixedly arranged on the top surface of the supporting mechanism. The air extraction mechanism is provided with a first air inlet, and the first air inlet is in communication with the sampling piece. The sampling piece is movably connected to the first air inlet. The sealing piece is arranged between the sampling piece and the first air inlet. The sampling piece is a hollow thin-walled structure with an open top. The sampling piece comprises a first cylindrical part, a first conical part, a second cylindrical part, a second conical part and a third cylindrical part which are integrally connected in sequence from top to bottom. The side wall of the first cylindrical part extends outward to form a second air inlet. The top opening of the first cylindrical part forms a first air outlet. The first air outlet is connected to the first air inlet. The bottom outlet of the third cylindrical part forms a second air outlet. The second air outlet is connected to the collecting piece.

[0008] Preferably, the support mechanism top surface is fixedly provided with a mounting plate, the mounting plate is provided with a through hole, the sealing element is arranged above the through hole, the sealing element is annular, the outer ring radius of the sealing element is greater than the through hole radius, the through hole radius is greater than the inner ring radius of the sealing element, and the sealing element is arranged with the through hole as a common center; the air extraction mechanism is fixedly arranged on the mounting plate, the first air inlet of the air extraction mechanism is tightly connected with the through hole through the sealing element, and the air inlet of the air extraction mechanism is communicated with the through hole in correspondence.

[0009] Preferably, the top inner wall of the first cylindrical part extends to the center direction to form a circular ring, and the inner diameter of the circular ring extends axially to form a thin-walled fourth cylindrical part.

[0010] Preferably, the mounting plate is provided with a handle.

[0011] Preferably, the sealing element is made of flexible material.

[0012] Preferably, the air extraction device further comprises a power supply module and an external control unit.

[0013] Preferably, the air extraction mechanism is one of a turbine fan, a centrifugal fan, an axial flow fan and a screw type fan.

[0014] Compared with the prior art, the air extraction device has the following beneficial effects:

[0015] When the air extraction device works, negative pressure is extracted in the sampling element, and the external air sample enters the first cylindrical part in the sampling element from the second air inlet under the action of the negative pressure. After the air enters the first cylindrical part, a spiral air flow is formed. When the air flow reaches the first conical part with gradually decreasing inner wall radius, the air flow rate increases. Then the air flow further spirally enters the second cylindrical part at high speed. With the air extraction mechanism continuously extracting negative pressure in the sampling element, the spiral air flow gradually spirally moves downward to maintain the air pressure balance in the sampling element. When the air further enters the second conical part with gradually decreasing outer wall radius, the air flow rate increases, the centrifugal force gradually increases, and the bacteria particles in the air are thrown to the inner wall of the second conical part under the action of the centrifugal force and fall into the collecting element under the action of gravity. At this time, the microorganisms in the air are collected into the collecting element, and the remaining air is gradually discharged from the fourth cylindrical part upward under the suction force of the negative pressure after reaching the collecting element; through the reasonable structural design of the sampling element, the spiral speed of the air in the sampling element is improved, thereby increasing the sampling rate of the sampler. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 The air sampler structure schematic view provided by the present application is shown in the figure.

[0018] Figure 2 The exploded view of Figure 1

[0019] Figure 3 The sampling member structure schematic view is shown in the figure.

[0020] Figure 4 The sampling member sectional view is shown in the figure.

[0021] Figure 5 The air suction mechanism structure schematic view is shown in the figure.

[0022] Figure 6 The sampling member structure schematic view provided by the second embodiment is shown in the figure.

[0023] Figure 7 The air sampler structure schematic view provided by the present application is shown in the figure.

[0024] Figure 8 The structure block diagram of the third embodiment is shown in the figure.

[0025] Figure 9 The structure block diagram of the fourth embodiment is shown in the figure.

[0026] Among them:

[0027] 1 is a supporting mechanism, 101 is a mounting plate, 102 is a through hole, and 103 is a handle.

[0028] 2 is an air suction mechanism, and 201 is a first air inlet.

[0029] 3 is a sampling member, 301 is a first cylindrical part, 302 is a first conical part, 303 is a second cylindrical part, 304 is a second conical part, 305 is a third cylindrical part, 306 is a second air inlet, 307 is a first air outlet, 308 is a second air outlet, 309 is an extension part, 310 is a rotating buckle, 311 is a rotating buckle groove, and 312 is a fourth cylindrical part.

[0030] 4 is a collecting member.

[0031] 5 is a sealing member.

[0032] 6 is a power supply module.

[0033] ​7 is an external control unit. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] The utility model aims at providing an air sampler to solve the problems in the prior art, that is, to provide an air sampler with high sampling rate.

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, easy to understand, the utility model will be further described in detail in connection with the drawings and specific embodiments.

[0037] Embodiment one

[0038] Please refer to Figures 1 to 5 An air sampler comprises a supporting mechanism 1, an air extraction mechanism 2, a sampling piece 3, a collecting piece 4 and a sealing piece 5. The air extraction mechanism 1 is fixedly arranged on the top surface of the supporting mechanism 1. The air extraction mechanism 2 is provided with a first air inlet 201, the first air inlet 201 is communicated with the sampling piece 3, the sampling piece 3 is movably connected with the first air inlet 201, and the sealing piece 5 is arranged between the sampling piece 3 and the first air inlet 201. The sampling piece 3 is a hollow thin-walled structure with an open top, and comprises a first cylindrical part 301, a first conical part 302, a second cylindrical part 303, a second conical part 304 and a third cylindrical part 305 which are connected in an integrated manner from top to bottom. The bottom outer wall radius of the first cylindrical part 301 gradually decreases to form the first conical part 302, the bottom outer wall radius of the first conical part 302 remains unchanged to form the second cylindrical part 303, the bottom outer wall radius of the second cylindrical part 303 gradually decreases to form the second conical part 304, the bottom outer wall radius of the second conical part 304 remains unchanged to form the third cylindrical part 305, the side wall of the first cylindrical part 301 extends outward to form a second air inlet 306, the top opening of the first cylindrical part 301 forms a first air outlet 307, the first air outlet 307 is connected with the first air inlet 201, the bottom outlet of the third cylindrical part 305 forms a second air outlet 308, the collecting piece is connected at the second air outlet 308, the sampling liquid is pre-stored in the collecting piece 3, and the air outlet of the air extraction mechanism 2 is communicated with the outside.

[0039] In the embodiment, in order to facilitate installation and dismounting and cleaning of the sampling element 3 after sampling is completed, the sampling element 3 and the supporting mechanism 1 are connected by rotating buckling, and the collecting element 4 is connected with the second air outlet 308 by screwing; in the embodiment, the second air inlet 308 is connected with the first air outlet 201 and the second air outlet 308, the first air outlet is arranged at the top of the sampling element, and the second air outlet is arranged at the bottom of the sampling element, and the top of the sampling element is connected with the first air inlet of the air extraction mechanism;

[0040] The air sampling principle of the embodiment is as follows: the second air inlet 308 is tangent to the inner wall of the first cylindrical part 301, external air enters the first cylindrical part 301 tangentially from the second air inlet 308, after entering the first cylindrical part 301, the air encounters the inner wall of the first cylindrical part 301 and turns, and the air repeatedly turns around the inner wall of the first cylindrical part 301, forming a spiral air flow, when the air flow reaches the first conical part 302, the air flow rate increases due to the gradually reduced radius of the inner wall of the first conical part 302, and the air amount entering the sampling element 3 is increased in the same sampling time, so that more air samples can enter the sampling element 3, in this process, the spiral motion of the air flow generates centrifugal force, the first conical part 302 ensures the initial high-speed centrifugal force in the sampling element 3, then the air flow further spirally and fast adheres to the wall of the second cylindrical part 303, and as the air extraction mechanism 2 continuously extracts negative pressure in the sampling element 3, the air flow continuously spirally adheres to the wall and moves downward to maintain the air pressure balance in the sampling element 3, when the air flow enters the second conical part with a gradually reduced outer wall radius, the air flow rate increases, and the centrifugal force gradually increases, and the bacteria particles in the air are thrown to the inner wall of the second conical part 304 under the action of the gradually increased centrifugal force, the bacteria particles fall into the collecting element 4 under the action of gravity and enter the sampling liquid, and the air flow is gradually extracted upward from the first cylindrical part 301 under the negative pressure suction provided by the air extraction mechanism 2 after reaching the collecting element 4, so as to maintain the air pressure balance inside and outside the sampling element 3; the sealing element 5 ensures the sealing between the air extraction mechanism 2 and the sampling element 3, and the sealing between the air extraction mechanism 2 and the sampling element 3 ensures that strong negative pressure is generated in the sampling element when the air extraction mechanism 2 extracts air in the sampling element 3, so as to ensure that external air enters the inside of the sampling element 3 under the action of the strong negative pressure. Therefore, the supporting mechanism 1, the air extraction mechanism 2, the sampling element 3, the collecting element 4 and the sealing element 5 can be used to collect bacteria in the air, the air flow rate entering the sampling element 3 is increased, the air amount entering the sampling element 3 is increased in a short sampling time, and thus the sampling rate of the sampling element is improved.

[0041] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 4The top surface of the supporting mechanism 1 is fixedly provided with a mounting plate 101, the mounting plate 101 is provided with a through hole 102, the sealing element 5 is arranged above the through hole 102, the sealing element 5 is annular, the outer ring radius of the sealing element 5 is greater than the radius of the through hole 102, the radius of the through hole 102 is greater than the inner ring radius of the sealing element 5, and the sealing element 5 is arranged with the through hole 102 and has the same center. The air extraction mechanism 2 is fixedly arranged on the mounting plate 101, the first air inlet 201 of the air extraction mechanism 2 is tightly connected with the through hole 102 through the sealing element 5, and the first air inlet 201 of the air extraction mechanism 2 is in communication with the through hole 102 in correspondence. In this way, only one sealing element 5 is needed, the sealing between the air inlet of the air extraction mechanism 2, the mounting plate 101 and the top surface of the sampling element 3 is realized, the structure is simplified, and when the air extraction mechanism 2 extracts negative pressure from the sampling element 3, strong negative pressure is generated in the sampling element 3, so that the external air sample smoothly enters the sampling element 3.

[0042] In the embodiment, in order to simplify the structure and facilitate installation, the first cylindrical part 301 is further provided with an extension part 309, the extension part 309 is provided with a rotating buckle 310, and the through hole 102 below the mounting plate 101 is fixedly provided with a corresponding rotating buckle slot 311. The sampling element 3 is docked with the rotating buckle slot 311 below the through hole 102 on the mounting plate 101 through the rotating buckle 310.

[0043] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , the inner wall of the top of the first cylindrical part 301 extends to the center direction to form a circular ring, and the inner diameter of the circular ring extends axially to form a thin-walled fourth cylindrical part 312. In this way, the air sample entering the sampling element 3 from the second air inlet 308 is prevented from being extracted by the air extraction mechanism 2 from the first air inlet 201, so that the air sample cannot enter the sampling element 3; when the air extraction mechanism 2 is turned on, negative pressure is first extracted in the fourth cylindrical part 312, and then negative pressure is further extracted in the sampling element 3, so that the air extraction mechanism 2 can extract negative pressure in the sampling element 3, thereby forming a spiral airflow, so that external air can smoothly enter the inside of the sampling element 3, improving the sampling rate, and bacteria in the air are thrown to the second conical part 304 under the action of centrifugal force, and finally enter the collecting element 4 under the action of gravity.

[0044] In the embodiment, the inner diameter of the circular ring extends axially downward to form a thin-walled fourth cylindrical part 312.

[0045] In some embodiments, please refer to Figure 1 and Figure 2 , in order to facilitate carrying and operation, the mounting plate 101 is provided with a handle 103.

[0046] In some embodiments, please refer to Figure 2To ensure the airtightness between the suction mechanism and the sampling component, the sealing component 5 is made of a flexible material, such as silicone or rubber.

[0047] In some embodiments, please refer to Figure 7 To facilitate portability and control, the device also includes a power supply module 6 and an external control unit 7. In this embodiment, the external control unit 7 is a button and the power supply module 6 is a lithium battery, enabling the device to work independently without an external power source. The air sampler provided in this embodiment has no limitations on its application scenarios and is easy to carry.

[0048] In some embodiments, please refer to Figure 1 The extraction mechanism 2 is one of a turbine fan, centrifugal fan, axial fan, or screw fan. In order to simplify the structure, the preferred extraction mechanism in this embodiment is a turbine fan.

[0049] Example 2

[0050] This embodiment provides another air sampler, which has all the advantages described in Embodiment 1, and will not be repeated here.

[0051] Please refer to Figure 6 In this embodiment, the fourth cylindrical portion 312 is oriented differently from that in Embodiment 1. The inner diameter of the ring extends axially upward to form a thin-walled fourth cylindrical portion 312.

[0052] Example 3

[0053] This embodiment possesses all the advantages described in Embodiment 1, and will not be repeated here. Based on the air sampler provided in Embodiments 1 and 2, this embodiment adds an automatic cleaning device. After sampling, the cleaning of the sample can be completed automatically, simplifying the cleaning operation and eliminating the need for manual labor. Details are as follows; please refer to [the relevant documentation]. Figure 8 The first, second, and third peristaltic pumps are connected to the collection tube. The first peristaltic pump is connected to the disinfectant bottle, the second peristaltic pump is connected to the cleaning solution bottle, and the third peristaltic pump is connected to the sampling solution bottle. The disinfectant bottle contains sodium hypochlorite solution, the cleaning solution bottle contains purified water, and the sampling solution bottle contains sampling solution. In addition, the collection tube is also connected to the fourth peristaltic pump, which is connected to the storage bottle, which is a waste liquid bottle.

[0054] The steps for cleaning the sample after sampling are as follows:

[0055] 1. Turn on the first peristaltic pump to pump the disinfectant from the disinfectant bottle into the collection tube and then into the sampling device. Turn on the suction mechanism 2 to make the disinfectant vortex and oscillate on the inner wall of the sampling device to clean the inner wall of the sampling device. After cleaning, turn off the first peristaltic pump and the suction mechanism 2, turn on the fourth peristaltic pump to pump the cleaned disinfectant into the storage bottle, and turn off the fourth peristaltic pump.

[0056] 2. Turn on the second peristaltic pump, pump the purified water in the cleaning liquid bottle into the collection tube and then into the sampling member, make the liquid level of the purified water higher than that of the disinfectant in the previous step, turn on the air suction mechanism 2, make the purified water swirl and shake in the inner wall of the sampling member to clean the inner wall of the sampling member, after cleaning, turn off the second peristaltic pump and the air suction mechanism 2, turn on the fourth peristaltic pump, pump the cleaned purified water into the storage bottle, and turn off the fourth peristaltic pump.

[0057] 3. Turn on the third peristaltic pump, pump the sampling liquid in the sampling liquid bottle into the collection tube and then into the sampling member, turn on the air suction mechanism 2, make the sampling liquid swirl and shake in the inner wall of the sampling member to clean the inner wall of the sampling member, after cleaning, turn off the third peristaltic pump and the air suction mechanism 2, turn on the fourth peristaltic pump, pump the cleaned sampling liquid into the storage bottle, and turn off the fourth peristaltic pump.

[0058] Example Four

[0059] This embodiment has all the advantages of Example Three, which will not be repeated here. This embodiment adds an automatic cleaning device to the air sampler provided in Example One and Example Two. Please refer to Figure 9 Unlike Example Three, the disinfectant bottle, the cleaning liquid bottle, and the sampling liquid bottle are connected to the switching valve, the switching valve is connected to the first peristaltic pump, the first peristaltic pump is connected to the collection tube; in addition, the collection tube is also connected to the second peristaltic pump, and the fourth peristaltic pump is connected to the storage bottle.

[0060] When the sampling is completed and the sampling member needs to be cleaned, the steps are as follows:

[0061] 1. Control the switching valve to be connected to the disinfectant bottle, turn on the first peristaltic pump, pump the disinfectant in the disinfectant bottle into the collection tube and then into the sampling member, turn on the air suction mechanism 2, make the disinfectant swirl and shake in the inner wall of the sampling member to clean the inner wall of the sampling member, after cleaning, turn off the first peristaltic pump and the air suction mechanism 2, turn on the second peristaltic pump, pump the cleaned disinfectant into the storage bottle, and turn off the second peristaltic pump.

[0062] 2. Control the switching valve to be connected to the cleaning liquid bottle, turn on the first peristaltic pump, pump the purified water in the cleaning liquid bottle into the collection tube and then into the sampling member, make the liquid level of the purified water higher than that of the disinfectant in the previous step, turn on the air suction mechanism 2, make the purified water swirl and shake in the inner wall of the sampling member to clean the inner wall of the sampling member, after cleaning, turn off the first peristaltic pump and the air suction mechanism 2, turn on the second peristaltic pump, pump the cleaned purified water into the storage bottle, and turn off the second peristaltic pump.

[0063] 3. Connect the control switching valve to the sampling liquid bottle, turn on the first peristaltic pump to pump the sampling liquid in the sampling liquid bottle into the collection tube and then into the sampling element, turn on the air extraction mechanism 2 to make the sampling liquid vortex and oscillate on the inner wall of the sampling element to clean the inner wall of the sampling element. After cleaning, turn off the first peristaltic pump and the air extraction mechanism 2, turn on the second peristaltic pump to pump the cleaned sampling liquid into the storage bottle, and turn off the second peristaltic pump.

[0064] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An air sampler characterized by: The application relates to a sampling device, which comprises a supporting mechanism, an air extraction mechanism, a sampling piece, a collecting piece and a sealing piece; the air extraction mechanism is fixedly arranged on the top surface of the supporting mechanism; a first air inlet is arranged on the air extraction mechanism and is communicated with the sampling piece; the sampling piece is movably connected with the first air inlet; the sealing piece is arranged between the sampling piece and the first air inlet; the sampling piece is a hollow thin-walled structure with an open top; the sampling piece comprises a first cylindrical part, a first conical part, a second cylindrical part, a second conical part and a third cylindrical part which are integrally connected in sequence from top to bottom; the side wall of the first cylindrical part extends outward to form a second air inlet; the top opening of the first cylindrical part forms a first air outlet which is connected with the first air inlet; the bottom outlet of the third cylindrical part forms a second air outlet which is connected with the collecting piece.

2. The air sampler of claim 1, wherein: A mounting plate is fixedly arranged on the top surface of the supporting mechanism; a through hole is arranged on the mounting plate; the sealing piece is arranged above the through hole; the sealing piece is annular; the outer ring radius of the sealing piece is larger than the radius of the through hole; the radius of the through hole is larger than the inner ring radius of the sealing piece; the sealing piece and the through hole are arranged at the same center; the air extraction mechanism is fixedly arranged on the mounting plate; the first air inlet of the air extraction mechanism is tightly connected with the through hole through the sealing piece; the air inlet of the air extraction mechanism is communicated with the through hole.

3. The air sampler of claim 2, wherein: The top inner wall of the first cylindrical part extends towards the center to form an annular ring; the inner diameter of the annular ring extends axially to form a thin-walled fourth cylindrical part.

4. The air sampler of claim 2, wherein: A handle is arranged on the mounting plate.

5. The air sampler of claim 1, wherein: The sealing piece is made of flexible material.

6. The air sampler of claim 1, wherein: A power supply module and an external control unit are further arranged.

7. The air sampler of claim 1, wherein: The air extraction mechanism is one of a turbo fan, a centrifugal fan, an axial flow fan and a screw fan.

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