CN113549550A

CN113549550A - Microorganism aerosol sampler

Info

Publication number: CN113549550A
Application number: CN202010326565.4A
Authority: CN
Inventors: 赵银龙; 杨富成; 徐盼; 杨阳
Original assignee: Beijing Huironghe Technology Co Ltd
Current assignee: Beijing Huironghe Technology Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-10-26

Abstract

The invention discloses a microbial aerosol sampler which adopts the technical scheme that the microbial aerosol sampler comprises a filtering component, a fan and a control circuit module, wherein the fan and the control circuit module are electrically connected with each other, the filtering component comprises a filter membrane which is provided with an electric field due to the fact that electret materials are contained, the control circuit module controls the fan to extract external gas, the filter membrane filters the external gas extracted by the fan, most particles in the gas can be trapped by static electricity, and part of particles can be trapped in the filter membrane due to the blocking of filter membrane fibers. The design of the technical scheme aims to achieve the purposes of realizing large sampling flow, shortening the time required by collection, being capable of being quickly disassembled and cleaned, integrating the functions of electret electrostatic trapping and filtering trapping, having small impact and being beneficial to the survival of microorganisms; in addition, the microorganism aerosol sampler has no liquid medium, and can sample under the conditions of low temperature and high temperature.

Description

Microorganism aerosol sampler

Technical Field

The invention relates to microbial aerosol, belongs to the technical field of biochemical experiments, and particularly relates to a microbial aerosol sampler.

Background

At present, the novel coronavirus is confirmed to be mainly transmitted through droplets and aerosol, particularly in dry winter, large-particle droplets containing viruses, which are emitted from coughing or sneezing, are easier to volatilize and become small-particle aerosol, the aerosolized viruses are easy to cause high infection speed along with air diffusion, a large number of people are infected, the aerosol viruses are difficult to find visually, the novel coronavirus can be infected without diseases in the latent period, namely, the virus aerosol can be generated in the latent period, and the prevention difficulty of places where people gather, such as hospitals, automobile railway stations, airports, subway stations and the like, is greatly increased. Since information on whether the air contains viruses cannot be obtained, it is necessary to take various high-cost prevention and control measures such as people flow and traffic control in various places. If pathogens such as new coronavirus and the like in air need to be monitored and early-warned, the core technology mainly comprises two technologies, one is to quickly obtain sufficient microorganism samples from the air and the other is to develop a kit for detecting the viruses. The two are integrated to finish the monitoring and early warning of the new coronavirus (or other virus microorganisms) in the air, and an important monitoring tool is provided for epidemic prevention and control.

The microbial aerosol is a colloid system formed by suspending a population of small and simple-structured single cells or organisms close to the single cells in air, and the particle size is 0.01-100 microns, generally 0.30 microns. The microbial aerosol has six characteristics of heterogeneity of sources, diversity of types, changeability of activity, three micro types of dissemination, reproducibility of deposition and universality of infection. The activity of the microbial aerosol is always in a changing state from the moment when the microbial aerosol is formed, and the research and the monitoring of the concentration, the type, the distribution and the changing rule of the microbial aerosol in the air have important significance. The research on the microbial aerosol firstly needs to sample the microbial aerosol to carry out subsequent analysis and research.

The instruments commonly used in current microbial aerosol samplers are AGI (liquid impact sampler) and six-grade anderson sampler. The two samplers have small flow, require a long time for sampling to reach the detection concentration in a low-concentration microorganism environment, and have great impact on microorganism activity in the sampling process, so that a microorganism aerosol sampler which has large flow, can be used in low-temperature and high-temperature conditions and has small impact on microorganisms is required to be developed.

Disclosure of Invention

The invention aims to provide a microbial aerosol sampler which has the characteristics of large flow, capability of being used at low temperature and high temperature, capability of being quickly disassembled and cleaned, integration of electret electrostatic trapping and filtering trapping functions, small impact on microbes and benefit for the survival of the microbes.

The technical purpose of the invention is realized by the following technical scheme:

a microbial aerosol sampler comprises a filter assembly, a fan and a control circuit module which are electrically connected with each other;

the filter component comprises a filter membrane, the filter membrane contains electret materials and is provided with an electric field;

the fan is used for extracting the external gas, and the filter membrane is configured to filter the external gas extracted by the fan.

Through the above technical scheme of sampling, when external gas (aerosol) is drawn by the fan and passes through, most particles can be trapped by static on the filter membrane containing electret materials, and partial particles can be trapped in the filter membrane due to the blocking effect of filter membrane fibers, and the trapping efficiency is completely superior to that of the conventional glass fiber filter membrane.

Furthermore, the device also comprises a shell consisting of an upper shell and a lower shell, and the upper shell and the lower shell are detachably and fixedly connected;

the fan and the control circuit module are respectively arranged in the upper shell and the lower shell;

the upper shell is provided with a gas passage for the fan to extract the outside gas and an air outlet for the gas to be discharged, and the filtering component is detachably connected with the upper shell at the gas passage on the upper shell.

By adopting the technical scheme, the upper shell and the lower shell can protect the filter assembly, the fan and the control circuit module in the shell from being damaged by the external environment, and can combine the filter assembly, the fan and the control circuit module together, so that the portable air conditioner is convenient to carry and transport; in addition, the filter component is convenient to replace, and different filter membranes can be replaced to realize different sampling purposes.

Furthermore, a clamping hole is formed in one side edge of the top of the lower shell, a raised mounting part matched with the clamping hole is arranged on one side edge of the bottom of the upper shell, and the raised mounting part is clamped in the clamping hole when the upper shell and the lower shell are connected;

set up spacing locking device between epitheca and the inferior valve, spacing locking device configures to the connection spacing between epitheca and the inferior valve fixed.

Through sampling above-mentioned technical scheme, the mounting means between epitheca and the inferior valve, simple structure, the installation is convenient with the dismantlement, is convenient for wash the cleanness that disappears, can reach waterproof efficiency simultaneously washing the in-process that disappears.

Furthermore, the limiting and locking device comprises a knob arranged on the upper shell and a limiting block arranged on the lower shell;

two arc-shaped check blocks are arranged on the knob oppositely, and openings for the limiting blocks to pass through are formed in the two ends of the two arc-shaped check blocks in a clearance mode;

when epitheca and inferior valve pass through spacing fixed of spacing locking device, the stopper is located between epitheca and one of them arc dog, and stopper and epitheca and arc dog all butt.

Through the above technical scheme of sampling, when the epitheca joint was on the inferior valve, the stopper can get into two arc dog pieces of knob via the opening part in, then rotatory knob until arc dog piece and epitheca all with the stopper butt, the stopper can not reciprocate this moment, and then accomplish the spacing fixed of epitheca and inferior valve, simple structure, convenient operation.

Further, the filtering component comprises a filtering membrane and a filtering membrane bracket, the filtering membrane bracket is detachably connected with the upper shell, and the filtering membrane bracket are integrally formed or the filtering membrane is detachably clamped and installed on the filtering membrane bracket.

Through the above technical scheme of sampling, compare on the epitheca with filter membrane direct mount, the design of this structure has made things convenient for the installation and the change of filter membrane.

Further, the filter assembly also comprises a support frame, and the support frame is arranged below the filter membrane to support the filter membrane.

Through the above technical scheme of sampling, the support frame supports the filter membrane, avoids the filter membrane to warp or because of receiving the emergence of the circumstances such as the inhomogeneous fragile of gas pressure under the circumstances that external gas passed through.

Furthermore, the fan and the control circuit module are installed in a spring contact manner;

the fan is provided with a plurality of contact holes, springs are fixedly connected in the contact holes, steel balls are contacted with one side of the spring, which is opposite to the bottom of the contact hole, and the steel balls protrude out of the contact holes when the springs are in a natural state;

the lower shell is provided with a plurality of metal contacts electrically connected with the control circuit module, and the plurality of metal contacts and the plurality of contact holes are arranged in a one-to-one correspondence mode.

Through the above technical scheme of sampling, when epitheca and inferior valve are connected, the steel column on the fan is direct to be electrically conductive with the metal contact, need not the lead wire and leaks outward, and the installation is very convenient and the appearance is pleasing to the eye.

Further, the control circuit module comprises a battery and a control circuit board which are electrically connected with each other;

the control circuit board is used for controlling the starting and starting time of the fan.

Through the above technical scheme of sampling, the battery can supply power to control circuit board, and then controls the normal operating of whole microorganism sample thief, can work under the condition that does not have external power supply, can adapt to multiple work occasion, and application range is wide.

Further, a switch and an indicator light are arranged on the lower shell;

the switch is used for controlling the control circuit board and the battery to be electrified or powered off and is also used for controlling the starting or stopping of the fan.

Through the technical scheme, the working state of the microorganism sampler can be conveniently controlled and observed.

Furthermore, a communication interface for connecting a control computer and a charging interface for charging the battery are further arranged on the lower shell.

By adopting the technical scheme, the connection of a control computer is facilitated, and the rotating speed, the running time and the like of the fan can be adjusted.

In conclusion, the invention has the following beneficial effects:

(1) control circuit module control fan starts, when the fan extracts external gas and gets into the shell through the gas passage of shell, filter external gas through the filter membrane earlier, the filter membrane adopts the material that contains the electret, have static, when gas passes through, most particles can be by the electrostatic trapping, some particles can be held back in the filter membrane because the spacing effect that blocks of filter membrane in addition, the entrapment efficiency is superior to traditional glass fiber filter membrane entrapment completely, and integrated electret electrostatic trapping and filtration entrapment function, the impact is little, be favorable to the survival of microorganism in the gas. Meanwhile, the microbial aerosol sampler has large flow and can shorten the time required by sampling.

(2) Because the whole microorganism aerosol sampler adopts the filtering component to filter and trap air for sampling, no liquid medium exists in the whole sampling process, and the sampling can be carried out under the conditions of low temperature and high temperature.

(3) The filter membrane support can support the filter membrane, has avoided the filter membrane to be damaged or warp under the impact force of outside air flow in-process, has improved the life of filter membrane.

(4) The power supply mode of the fan adopts spring contact, and the power supply of the fan can be realized by directly aligning and pressing down without external leakage of a lead.

(5) The installation mode of the upper shell and the lower shell has simple structure, convenient installation and decontamination, and can achieve the waterproof effect in the decontamination process.

(6) The whole structure is simple, single-key operation can be realized, the size is small, the weight is light, and the carrying and field operation are convenient.

Drawings

FIG. 1 is an overall structure diagram of a microbial aerosol sampler in an embodiment;

FIG. 2 is an exploded view of an embodiment of a microbial aerosol sampler;

FIG. 3 is a schematic structural diagram of the installation of the upper shell and the fan in the microbial aerosol sampler in the embodiment;

FIG. 4 is a schematic structural diagram of a knob in the microbial aerosol sampler in the embodiment.

In the figure:

1. an upper shell; 1a, a gas channel; 1b, an air outlet; 1c, a bump mounting part;

2. a lower case; 2a, clamping holes; 2b, metal contacts; 2c, a limiting block;

3. a knob; 3a, an arc-shaped stop block; 3b, opening;

4. a filter assembly; 4a, a filter membrane; 4b, a filter membrane bracket; 4c, a support frame;

5. a fan; 5a, contact holes; 5b, a spring; 5c, steel balls;

6. a control circuit module;

7. a switch;

8. an indicator light;

9. a communication interface;

10. and a charging interface.

Detailed Description

In order to make the objects, solutions and advantages of the embodiments of the present invention clearer, some specific embodiments of the present invention will be described in detail with reference to fig. 1 to 4 and examples, but not by way of limitation. The same reference numbers in the drawings identify the same or similar elements or components and those skilled in the art will understand that the drawings are not necessarily drawn to scale.

As shown in fig. 1 to 2, the microbial aerosol sampler in the embodiment includes a housing, the housing includes an upper housing 1 and a lower housing 2, a filter assembly 4 and a fan 5 are disposed in the upper housing 1, and a control circuit template 6 is disposed in the lower housing 2, wherein the fan 5 is electrically connected to the control circuit template 6, and the control circuit template 6 controls the start or stop of the fan 5, the start time of the fan 5, and the like. The fan 5 is used for extracting outside air to enter the upper shell 1, the upper shell 1 is provided with an air passage 1a used for the outside air to enter the shell and an air outlet 1b used for the air to flow out, the air suction port of the fan 5 is arranged opposite to the air passage 1a, and the filter assembly 4 is detachably and fixedly connected with the upper shell 1 at the air passage 1 a.

The filter assembly 4 comprises a filter membrane bracket 4b, a filter membrane 4a and a support frame 4c, the support frame 4c is arranged below the filter membrane 4a to support the filter membrane 4a, and the support frame 4c is provided with a plurality of vent holes so as to facilitate the flow of the external gas extracted by the fan 5. The filter membrane 4a adopts the electret material, has the electric field, and filter membrane 4a can dismantle to fix on filter membrane bracket 4b or with filter membrane bracket 4b integrated into one piece design, filter membrane bracket 4b demountable installation is on epitheca 1. In order to facilitate the disassembly and assembly of the filter assembly 4, the filter membrane bracket 4b and the upper shell 1 are preferably mounted by using spring contacts, but not limited to, the specific embodiments are as follows: the upper shell 1 is provided with a plurality of connecting parts used for being connected with the filter membrane bracket 4b, one side of each connecting part, facing the filter membrane bracket 4b, is provided with a mounting hole, an elastic part is fixedly connected in each mounting hole, and one side, opposite to the connecting parts, of each elastic part is in contact connection with a steel ball (the mounting holes, the elastic parts and the steel balls are not shown in the drawing). When the filter membrane bracket 4b is to be installed on the upper shell 1, the filter membrane bracket 4b is directly pressed downwards under the action of manual external force, the steel balls are pressed into the installation holes to extrude the elastic piece, the elastic piece is compressed, at the moment, the steel balls are abutted against the filter membrane bracket 4b, and the filter membrane bracket 4b is installed and fixed under the action of friction force between the steel balls and the filter membrane bracket 4b and mutual pressure; when filter membrane bracket 4b needs to be dismantled, manual external force pulls filter membrane bracket 4b outward, and the elastic component of compressed this moment has outer bullet trend, and when exogenic action was greater than the interact power between steel ball and the filter membrane bracket 4b, filter membrane bracket 4b was dismantled and was taken out, and the elastic component resets.

As shown in fig. 2 and 3, the upper casing 1 and the lower casing 2 are detachably connected, and may be fixedly connected by screws, and in order to facilitate decontamination of the whole device and provide waterproof effect during decontamination, the connection mode of the upper casing 1 and the lower casing 2 in the present invention is preferably but not limited to the following clamping mode, and is provided with a limit locking device, and the limit locking device mainly performs limit fixation when the upper casing 1 and the lower casing 2 are fixedly connected, and the specific implementation mode is: be provided with protruding installation department 1c on the bottom side of epitheca 1, seted up joint hole 2a on the side on the top of lower casing 2 that the corresponding side at protruding installation department 1c place is corresponding, joint hole 2a and protruding installation department 1c phase-match. Install knob 3 on epitheca 1, be provided with two arc dog 3a on knob 3, two arc dog 3a are relative with the centre of a circle and set up, and the equal clearance setting in both ends of two arc dog 3a leaves opening 3b for set up two openings 3b on knob 3, the concrete structure of knob 3 is illustrated as figure 4. Be provided with stopper 2c on inferior valve 2, knob 3 and stopper 2c make up into spacing locking device jointly. Wherein, opening 3b on the knob 3 is greater than stopper 2c and can supply stopper 2c to pass through smoothly. When in protruding installation department 1c card to joint hole 2a of epitheca 1, rotatory knob 3 aligns until opening 3b and stopper 2c, stopper 2c enters into between two arc dog 3a of knob 3 via opening 3b department, then rotatory knob 3, stopper 2 c's upper and lower both ends at this moment respectively with epitheca 1 and an arc dog 3a butt, stopper 2c can not reciprocate by spacing fixed, and then epitheca 1 and inferior valve 2 are accomplished by spacing fixed connection of epitheca 1 and inferior valve 2. According to the invention, the limiting block 2c is preferably designed to be cylindrical, and when the upper shell 1 and the lower shell 2 are limited and fixedly connected, the limiting block 2c designed to be cylindrical is tangent to the arc-shaped stop block 3a, so that the knob 3 can be prevented from being locked, and the rotating space of the knob 3 can be enlarged.

Preferably, the fan 5 and the control circuit module 6 are mounted by using spring contacts. The epitheca 1 and inferior valve 2 communicate each other, and fan 5 is provided with a plurality of contact holes 5a towards inferior valve 2 one side, equal fixedly connected with spring 5b in the contact hole 5a, and spring 5b is the fixed electric conductor that is provided with steel ball 5c or other shapes in contact hole 5a bottom one side dorsad, and when spring 5b was in the natural state, steel ball 5c protruded contact hole 5a was outside. A plurality of metal contacts 2b are provided on one side of the lower case 2 facing the fan 5, and the plurality of metal contacts 2b and the plurality of contact holes 5a are provided in one-to-one correspondence. When the upper shell 1 and the lower shell 2 are fixedly connected, the steel balls 5c on the fan 5 are in one-to-one correspondence with the metal contacts 2b and the metal contacts 2b, and the steel balls 5c are pressed into the contact holes 5a to complete the conduction of the fan 5 and the control circuit module 6 without an external lead.

The control circuit module 6 includes a battery and a control circuit board (none of which is shown), the battery is electrically connected with the control circuit board, and the control circuit board is electrically connected with the fan 5. The switch 7 and the two indicator lamps 8 are arranged on the lower shell 2, the switch 7 is provided with three position states for controlling the electrification and the outage between the battery and the circuit board and the starting or the stopping of the fan 5, and the electrification and the outage or the working state of the fan 5 are marked by the different indicator lamps 8. The lower shell 2 is also provided with a communication interface 9 for connecting a control computer and a charging interface 10 for charging the battery.

The working principle of the microbial aerosol sampler provided by the invention is as follows: when the switch 7 is in a stop position state, the two indicator lights 8 are not on, and the microorganism aerosol sampler does not work at the moment. When the switch 7 is in the position state of electrifying the battery and the control circuit board, the two indicator lights 8 are both lighted to prompt the completion of electrifying, then the switch 7 is adjusted to the working position state, at the moment, the fan 5 and the control circuit board are electrified, the control circuit board controls the fan 5 to start working, the fan 5 draws outside air to enter the upper shell 1 through the gas channel 1a on the upper shell 1, the outside air firstly passes through the filter assembly 4 before entering the upper shell 1, most particles in the air are trapped by static electricity on the filter membrane 4a, and part of particles are trapped in the filter membrane 4a due to the blocking of the filter membrane fibers, thereby completing the trapping of microorganism particles, the capture mode has small impact, is favorable for the survival of microorganisms, adopts the fan 5 to extract the outside air and carries out microorganism particle capture and sampling through the filter component 4, has large flow and can shorten the time required by sampling. The whole sampling process is free of liquid medium and is not influenced by the change of the environmental temperature, so that the microbial aerosol sampler can sample under different environmental conditions such as low temperature or high temperature.

The communication interface 9 on the lower shell 2 can be connected with a control computer, control software for controlling the operation of the microbial aerosol sampler can be installed in the control computer, and an operator can control the wind speed, start or stop, start time and the like of the fan 5 through the control software.

When the electric quantity of the battery is insufficient, the battery can be charged through the charging interface 10, and smooth operation work of the microbial aerosol sampler is guaranteed. When battery electric quantity is sufficient, whole microorganism aerosol sample thief can not switch on external power and carry out work, can operate convenient to use in different occasions and scene.

The whole microbial aerosol sampler has the advantages of simple structure, no redundant and complicated devices and parts, single-key operation, small volume, light weight and portability.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A microorganism aerosol sampler is characterized in that: comprises a filtering component (4), a fan (5) and a control circuit module (6) which are electrically connected with each other;

the filter component (4) comprises a filter membrane (4 a), the filter membrane (4 a) contains electret materials and is provided with an electric field;

the fan (5) is used for extracting the outside air, and the filter membrane (4 a) is configured to filter the outside air extracted by the fan (5).

2. A microbial aerosol sampler according to claim 1, wherein: the shell is composed of an upper shell (1) and a lower shell (2), and the upper shell (1) and the lower shell (2) are detachably and fixedly connected;

the fan (5) and the control circuit module (6) are respectively arranged in the upper shell and the lower shell;

the upper shell (1) is provided with a gas channel (1 a) for the fan (5) to extract the outside gas to enter and an exhaust outlet (1 b) for the gas to exhaust, and the filtering component (4) is detachably connected with the upper shell (1) at the gas channel (1 a) on the upper shell (1).

3. A microbial aerosol sampler according to claim 2, wherein: a clamping hole (2 a) is formed in one side edge of the top of the lower shell (2), a raised mounting part (1 c) matched with the clamping hole (2 a) is arranged on one side edge of the bottom of the upper shell (1), and when the upper shell (1) is connected with the lower shell (2), the raised mounting part (1 c) is clamped in the clamping hole (2 a);

set up spacing locking device between epitheca (1) and inferior valve (2), spacing locking device configures to the spacing fixed of connection between epitheca (1) and inferior valve (2).

4. A microbial aerosol sampler according to claim 3, wherein: the limiting and locking device comprises a knob (3) arranged on the upper shell (1) and a limiting block (2 c) arranged on the lower shell (2);

two arc-shaped check blocks (3 a) are arranged on the knob (3), the two arc-shaped check blocks (3 a) are arranged oppositely, and openings (3 b) for the limiting blocks (2 c) to pass through are formed in the two ends of the two arc-shaped check blocks (3 a) in a clearance mode;

when the upper shell (1) and the lower shell (2) are limited and fixed through the limiting locking device, the limiting block (2 c) is located between the upper shell (1) and one of the arc-shaped stop blocks (3 a), and the limiting block (2 c) is abutted to the upper shell (1) and the arc-shaped stop block (3 a).

5. A microbial aerosol sampler according to claim 2, wherein: the filtering component (4) comprises a filtering membrane (4 a) and a filtering membrane bracket (4 b), the filtering membrane bracket (4 b) is detachably connected with the upper shell (1), and the filtering membrane (4 a) and the filtering membrane bracket (4 b) are integrally formed or the filtering membrane (4 a) is detachably clamped and installed on the filtering membrane bracket (4 b).

6. A microbial aerosol sampler according to claim 1, wherein: the filtering component (4) also comprises a supporting frame (4 c), and the supporting frame (4 c) is arranged below the filtering membrane (4 a) to support the filtering membrane (4 a).

7. A microbial aerosol sampler according to claim 3, wherein: the fan (5) and the control circuit module (6) are installed in a spring contact manner;

the fan (5) is provided with a plurality of contact holes (5 a), springs (5 b) are fixedly connected in the contact holes (5 a), one side, back to the bottom of the contact holes (5 a), of each spring (5 b) is in contact with a steel ball (5 c), and when the springs (5 b) are in a natural state, the steel balls (5 c) protrude out of the contact holes (5 a);

the lower shell (2) is provided with a plurality of metal contacts (2 b) electrically connected with the control circuit module (6), and the metal contacts (2 b) and the contact holes (5 a) are arranged in a one-to-one correspondence mode.

8. A microbial aerosol sampler according to claim 2, wherein: the control circuit module (6) comprises a battery and a control circuit board which are electrically connected with each other;

the control circuit board is used for controlling the starting and the starting time of the fan (5).

9. A microbial aerosol sampler according to claim 8, wherein: a switch (7) and an indicator light (8) are arranged on the lower shell (2);

the switch (&) is used for controlling the control circuit board to be electrified or cut off the power supply with the battery and is also used for controlling the starting or stopping of the fan (5).

10. A microbial aerosol sampler according to claim 8, wherein: the lower shell (2) is also provided with a communication interface (9) for connecting a control computer and a charging interface (10) for charging the battery.