CN218674421U

CN218674421U - Air sampler

Info

Publication number: CN218674421U
Application number: CN202222870525.3U
Authority: CN
Inventors: 庞艳; 程满满; 徐永来
Original assignee: SHENZHEN AMAE CO Ltd
Current assignee: SHENZHEN AMAE CO Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-21
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses an air sampler, include: the collecting pipe, the collecting head, the air duct and the air suction host machine; the collecting pipe is of a conical tubular structure with an opening at one end, and sampling liquid is arranged in the collecting pipe; two ends of the air duct are respectively communicated with one end of the collecting head and the air suction main machine; the other end of the collecting head is detachably connected with the open end of the collecting pipe, the joint of the collecting head and the collecting pipe is sealed, and an air inlet for air to enter is formed in the collecting head; the air flow inhaled by the air suction main machine ranges from 50L/min to 350L/min and from 400L/min to 1000L/min. The utility model has the advantages of wide range suction air flow range and simple operation.

Description

Air sampler

Technical Field

The utility model relates to a particulate matter sampling technical field especially relates to an air sampler.

Background

There are a large number of particulate matter in the ambient air, such as bioaerosol (bacteria, viruses, fungi, etc.) particles and PM2.5 particles, among others. Studies have shown that many health problems are associated with air pollutants, especially with exposure to bioaerosols. The generation, diffusion and transmission of bioaerosols are likely to cause outbreaks of large-scale infectious diseases such as SARS, H1N1, ebola, african swine fever, etc. The method can efficiently and quickly collect the microbial particles in the air, and is an important link for researching bioaerosol. With the development of rapid detection technologies, such as PCR, nucleic acid loop-mediated isothermal amplification technology, and enzyme-linked immunosorbent assay, rapid sampling equipment is urgently needed to sample bioaerosol and identify bioaerosol by matching with rapid detection equipment. At present, the air flow rate of a sampler based on the cyclone centrifugal principle is generally 200L/min to 400L/min, the range of the air flow rate is narrow, and the operation is complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air sampler with wide range intake air mass flow scope, easy operation.

In order to achieve the above object, the utility model discloses an air sampler, include: the collecting pipe, the collecting head, the air duct and the air suction host machine; the collecting pipe is of a conical tubular structure with one open end, and sampling liquid is arranged in the collecting pipe; two ends of the air duct are respectively communicated with one end of the collecting head and the air suction main machine; the other end of the collecting head is detachably connected with the open end of the collecting pipe, the joint of the collecting head and the collecting pipe is sealed, and an air inlet for air to enter is formed in the collecting head; the air flow inhaled by the air suction main machine ranges from 50L/min to 350L/min and from 400L/min to 1000L/min.

Preferably, an air inlet channel is arranged in the collecting head, the air inlet channel is communicated with an air inlet, the air inlet is arc-shaped, and the air inlet channel is spiral.

Preferably, the air suction host comprises a shell and an air pump, wherein an air guide port is formed in the shell, and the air guide pipe is communicated with the air guide port; the air pump is arranged in the shell.

Preferably, the air suction host further comprises an orifice flowmeter, and the orifice flowmeter is respectively communicated with the air guide port and the air guide tube.

Preferably, the upper part of the orifice flowmeter is detachably connected with the air duct, and the joint of the orifice flowmeter and the air duct is sealed; the lower part of the orifice flowmeter is communicated with the air guide port; the middle part of the orifice flowmeter is externally connected and communicated with two branch pipes from top to bottom respectively, and the branch pipes are connected with a differential pressure sensor; a pore plate is also arranged in the middle of the orifice flowmeter and is positioned between the two branch pipes; a filter screen is arranged above the pore plate and above the branch pipe.

The beneficial effects of the utility model are that: when air sampling is carried out, the air suction host machine is used for pumping out air in the collecting pipe, negative pressure is formed in the collecting pipe, air doped with particles enters sampling liquid of the collecting pipe from the air inlet, the particles are dissolved in the sampling liquid, gas is separated from the particles, and the separated gas flows into the air suction host machine through the air guide pipe and is discharged, so that the operation is simple; the air flow inhaled by the air suction main machine ranges from 50L/min to 350L/min and from 400L/min to 1000L/min, and the air suction main machine has a wide range of inhaled air flow.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an air sampler.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, an air sampler includes: a collecting pipe 100, a collecting head 200, an air duct 210 and an air suction host 300; the collection tube 100 is a conical tubular structure with an opening at one end, and a sampling liquid is arranged in the collection tube; two ends of the air duct 210 are respectively communicated with one end of the collecting head 200 and the air suction main machine 300; the other end of the collecting head 200 is detachably connected with the open end of the collecting pipe 100, the joint of the collecting head and the collecting pipe is sealed, and an air inlet 210 for air to enter is arranged on the collecting head 200; the air flow rate sucked by the suction main machine 300 ranges from 50L/min to 350L/min and from 400L/min to 1000L/min. When air sampling is carried out, the air suction host 300 is used for pumping out air in the collection tube 100, negative pressure is formed in the collection tube 100, air doped with particles enters sampling liquid of the collection tube 100 from the air inlet 210, the particles are dissolved in the sampling liquid, gas is separated from the particles, and the separated gas flows into the air suction host 300 through the air guide tube 210 and is discharged, so that the operation is simple; the air flow rate inhaled by the inhalation main unit 300 ranges from 50L/min to 350L/min, 400L/min to 1000L/min, which has a wide range of inhalation air flow rate. As shown in fig. 1, arrows indicate a route pattern of the air flow. The other end of collection head 200 and the open end detachable connection of collection pipe 100, both junctions are sealed, can adopt the helicitic texture to connect, and set up the sealing washer in the junction, play the sealed effect that prevents gas leakage, collection head 200 and the detachable connection of collection pipe 100, can supply new sampling liquid very conveniently, perhaps dismantle collection pipe 100 and get off and take the inspection, also can disinfect collection head 200 very conveniently, avoid the cross contamination of adjacent twice sampling. The range of the air flow rate sucked by the suction main unit 300 is mainly determined by the power of the suction main unit 300. The collection tube 100 can be made of transparent rigid plastic, which is convenient for the inspector to visually observe the residual amount of the sampling liquid in the collection tube 100 and the process of mixing the gas and the sampling liquid during sampling.

In one embodiment, the pick head 200 has an air inlet channel formed therein, the air inlet channel is in communication with an air inlet 210, the air inlet 210 is curved, and the air inlet channel is spiral. Because the collection tube 100 is a conical tubular structure with an opening at one end, the air inlet 210 is arc-shaped, and the air inlet channel is spiral, after the air suction main machine 300 works, air in the collection tube 100 is pumped out, negative pressure is formed in the collection tube 100, air doped with particulate matters enters the collection tube 100 from the air inlet 210 to form a rotational flow A (rotating airflow), most of the rotational flow A flows downwards spirally along the tube wall of the collection tube 100, the particulate matters in the rotational flow A generate centrifugal force in the rotating process, the particulate matters with the density higher than that of the gas are thrown to the tube wall, the collection liquid in the collection tube 100 rotates along with the rotational flow A, a rotational flow B (rotating liquid) is formed on the tube wall of the collection tube 100, the rotational flow B formed by the particulate matters in the rotational flow A colliding with the collection liquid is captured by the collection liquid, and the gas flows into the air suction main machine 300 through the gas guide tube 210 and is discharged.

In one embodiment, the inspiratory host 300 comprises a housing 320 and an air pump 310, wherein the housing 320 is provided with an air guide port, and the air guide tube 210 is arranged to communicate with the air guide port; the air pump 310 is disposed within the housing 320. The casing 320 is used for protecting the air pump 310, an air outlet is arranged on the casing 320, and the air pump 310 is used for sucking the air in the collection tube 100 and discharging the air from the air outlet.

In one embodiment, the inspiratory host 300 further comprises an orifice flow meter 400, wherein the orifice flow meter 400 is respectively communicated with the air guide port and the air guide tube 210. The air intake main unit 300 is further provided with an orifice flow meter 400, and the orifice flow meter 400 is used for measuring the flow rate of the air flowing into the air pump 310.

In one embodiment, the upper portion of the orifice flow meter 400 is removably connected to the airway tube 210, and the connection is sealed; the lower part of the orifice flowmeter 400 is communicated with the air guide port; two branch pipes 430 are respectively externally connected and communicated with the middle part of the orifice flowmeter 400 from top to bottom, and the branch pipes 430 are connected with a differential pressure sensor 440; an orifice plate 420 is also arranged in the middle of the orifice flowmeter 400, and the orifice plate 420 is positioned between two branch pipes 430; a filter screen 410 is arranged above the orifice plate 420, and the filter screen 410 is arranged above the branch pipe 430. The upper portion of orifice flowmeter 400 is connected with air duct 210 is detachable, and both junctions are sealed, can adopt the helicitic texture to connect, and set up the sealing washer in the junction, play sealed effect of preventing leaking gas. The orifice flowmeter 400, the air duct 210 and the collection tube 100 are detachably connected, so that the sampler can be conveniently disassembled and assembled, the collection head 200 and the air duct 210 can be conveniently sterilized, and the cross contamination of two adjacent samplings is avoided. An orifice plate 420 is further arranged in the middle of the orifice flowmeter 400, the orifice plate 420 is positioned between the two branch pipes 430, and a differential pressure sensor 440 is used for detecting the differential pressure between the upper part and the lower part of the orifice plate 420 and calculating to obtain a flow value. The filter screen 410 is disposed above the orifice plate 420 and is used for filtering the sucked air to prevent objects carried by the air from blocking the orifice plate 420 or being sucked into the air pump 310 to damage the air pump 310.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. An air sampler, comprising: the collecting pipe, the collecting head, the air duct and the air suction host machine;

the collecting pipe is of a conical tubular structure with an opening at one end, and sampling liquid is arranged in the collecting pipe;

two ends of the air duct are respectively communicated with one end of the collecting head and the air suction main machine; the other end of the collecting head is detachably connected with the open end of the collecting pipe, the joint of the collecting head and the collecting pipe is sealed, and an air inlet for air to enter is formed in the collecting head;

the air flow inhaled by the air suction main machine ranges from 50L/min to 350L/min and from 400L/min to 1000L/min.

2. An air sampler as recited in claim 1, wherein the pick head defines an air intake passage therein, the air intake passage being in communication with the air inlet, the air inlet being arcuate and the air intake passage being spiral.

3. The air sampler according to claim 1, wherein the air suction main unit comprises a housing and an air pump, the housing is provided with an air guide opening, and the air guide pipe is communicated with the air guide opening; the air pump is arranged in the shell.

4. The air sampler of claim 3, wherein the inspiratory host further comprises an orifice flow meter, the orifice flow meter being in communication with the air guide port and the air guide tube, respectively.

5. An air sampler as claimed in claim 4 wherein the upper part of the orifice flow meter is removably connected to the airway tube, the connection being sealed; the lower part of the orifice flowmeter is communicated with the air guide port; the middle part of the orifice flowmeter is externally connected and communicated with two branch pipes from top to bottom, and the branch pipes are connected with a differential pressure sensor; a pore plate is also arranged in the middle of the orifice flowmeter and positioned between the two branch pipes; a filter screen is arranged above the pore plate and above the branch pipe.