CN210427283U - Device for researching bioaerosol - Google Patents
Device for researching bioaerosol Download PDFInfo
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- CN210427283U CN210427283U CN201920984768.5U CN201920984768U CN210427283U CN 210427283 U CN210427283 U CN 210427283U CN 201920984768 U CN201920984768 U CN 201920984768U CN 210427283 U CN210427283 U CN 210427283U
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Abstract
The utility model discloses a device for researching biological aerosol, which comprises an air source, a cold dryer, an air filter, a liquid drop generator, a drying bin, an air flow controller and a receiving device; the air source, the cold dryer, the air filter, the liquid drop generator, the drying bin and the receiving device are sequentially connected; the inlet of the gas flow controller is connected with the outlet of the air filter, and the outlet of the gas flow controller is connected with the outlet of the drying bin. Compared with the prior art, the utility model discloses a device can provide the dry bioaerosol sample of different concentrations for bioaerosol research dynamic, accurately to provide the disinfection purification space behind necessary microenvironment space and the experimental study for bioaerosol research.
Description
Technical Field
The utility model belongs to the technical field of environmental quality detection research, especially, relate to a device for bioaerosol research.
Background
Bioaerosols refer to active microbial particles suspended in air that can be propagated through a culture medium under suitable growth conditions to a visible colony count. The research of bioaerosols relates to the fields of environmental protection, medical health, bioterrorism protection and the like. The concentration of the bioaerosol in the exposure environment directly influences the human health and is a main pathogenic factor of various respiratory diseases. The researches such as the generation, survival, diffusion limitation, rapid detection, distribution evaluation and the like of the bioaerosol are hot spots of the domestic and foreign researches.
Traditional bioaerosol studies have been conducted primarily in exposed environments. A plurality of bacteria, fungi, spores, pollen and other impurities exist in the exposed environment, and the research result is easily interfered; the direct biological aerosol research in the exposed environment is easy to cause environmental pollution.
Chinese utility model patent CN201193988Y discloses a microorganism aerosol generating device, this generating device include through compressed air supply processing apparatus, atomizer and the dry buffer that gas line connects gradually, wherein: the external gas is processed into airflow with stable pressure intensity by a compressed air supply device and then is introduced into a spraying device, a microorganism solution is contained in the spraying device and is used for spraying generated microorganism aerosol, the generated microorganism aerosol is mixed with the input airflow and then is dried by a drying buffer device, but the generating device has certain hysteresis for adjusting the sample concentration of the obtained dried microorganism aerosol and cannot meet the requirement of quickly and dynamically obtaining dried microorganism aerosol samples with different concentrations.
The Chinese patent application CN107754736A discloses a dynamic generation device of microbial aerosol, which comprises an air inlet air filter, a monodisperse generator, a flow controller, a valve group, a gas rectifying device, an aerosol test bin, an air outlet air filter, an air source and a decontamination gas generator; air inlet air cleaner's one end respectively with the one end of monodispersion generator and flow controller is connected, the other end of monodispersion generator and flow controller respectively with valve group connects, a port of valve group with gaseous fairing intercommunication, gaseous fairing with the upper portion intercommunication in aerosol test storehouse, vertical setting a baffle in the aerosol test storehouse is divided into test area and standard area two parts with aerosol test storehouse is inside, the bottom in aerosol test storehouse is passed through gas outlet air cleaner with the air supply is connected. Although the generating device can dynamically generate the microbial aerosol, the obtained microbial aerosol contains a large amount of micro liquid drops, and a large error exists between the measured concentration of an aerosol sample and the actual concentration of microbial particles, so that the accuracy of the evaluation result of the microbial aerosol is influenced.
SUMMERY OF THE UTILITY MODEL
To the problem in the above-mentioned background art, the utility model aims to provide a device for bioaerosol research is with accuracy and the dynamic adjustment that realizes bioaerosol sample concentration.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a device for researching bioaerosol comprises an air source, a cold dryer, an air filter, a liquid drop generator, a drying bin, an air flow controller and a receiving device;
the air source, the cold dryer, the air filter, the liquid drop generator, the drying bin and the receiving device are sequentially connected;
the inlet of the gas flow controller is connected with the outlet of the air filter, and the outlet of the gas flow controller is connected with the outlet of the drying bin.
Preferably, the air source is an adjustable fan or an air compressor.
Preferably, the drying bin is a drying bin filled with a solid desiccant.
Preferably, the solid desiccant is silica gel, montmorillonite, anhydrous calcium chloride or anhydrous magnesium sulfate.
Preferably, the device for bioaerosol research is further provided with a decontamination gas generator, and an outlet of the decontamination gas generator, an outlet of the air filter and an inlet of the liquid drop generator are connected through a three-way valve.
Preferably, the receiving means is provided with valves which control the opening of the inlet and outlet of the receiving means.
Compare with current microorganism aerosol generating device, the utility model discloses above-mentioned a device for biological aerosol research has following beneficial effect:
1. the utility model discloses can realize accuracy and the dynamic adjustment to biological aerosol sample concentration.
2. The utility model discloses can realize multiple mode, provide the disinfection purification space behind necessary microenvironment space and the experimental study for the research of biological aerosol.
Drawings
FIG. 1 is a schematic structural diagram of the apparatus for bioaerosol research of the present invention;
the device comprises a gas flow controller, a gas source 2, a cold dryer 3, an air filter 4, a droplet generator 5, a drying bin 6, a receiving device 7, a decontamination gas generator 8, a three-way valve 9, a biological aerosol inlet of the receiving device 71 and a waste gas outlet of the receiving device 72.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. The following describes the specific working principle of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1, a device for bioaerosol research comprises a gas source 2, a freeze dryer 3, an air filter 4, a droplet generator 5, a drying chamber 6, a gas flow controller 1 and a receiving device 7; the air source 2, the cold dryer 3, the air filter 4, the liquid drop generator 5, the drying bin 6 and the receiving device 7 are sequentially connected according to the airflow direction; the inlet of the gas flow controller 1 is connected with the outlet of the air filter 4, and the outlet of the gas flow controller 1 is connected with the outlet of the drying bin 6. The connection may be direct or via a gas line. The drying bin 6 is filled with common solid desiccant particles, such as silica gel, montmorillonite, anhydrous calcium chloride, anhydrous magnesium sulfate and other particles, and compared with heating drying, the activity of the microorganism particles can be prevented from being influenced by high temperature due to the solid desiccant drying.
An adjustable fan or an air compressor can be adopted as the air source 2 for outputting airflow power. Because air is prevented from carrying moisture and tiny solid impurities, air output from the air source 2 firstly passes through the air dryer 3 to remove moisture in the air, and then tiny solid impurities contained in the air are filtered by the air filter 4, so that dry, clean and stable air flow is provided for the generation process of the bioaerosol.
The air flow filtered by the air filter 4 is divided into two paths: one path of airflow passes through the droplet generator 5 at a constant flow rate, so that biological suspension in the droplet generator is atomized and dispersed to form wet aerosol, the generated wet aerosol enters the drying bin 6, and solid drying agent filled in the drying bin 6 is used for removing moisture mixed in the wet aerosol to obtain dry concentrated biological aerosol; and the other path of air flow is used as dilution air to dilute the dried concentrated biological aerosol, the two paths of air flows are converged and mixed in an outlet pipeline of the drying bin 6 and enter the receiving device 7, and the flow of the dilution air can be controlled by the air flow controller 1.
The following problems exist if the dilution gas is mixed with the wet sol for dilution and then dried: the large number of tiny droplets in the wet aerosol can generate large disturbance to the microorganism particles suspended in the air during the drying process, and the disturbance is uncontrollable, so that the dilution mode cannot accurately and dynamically adjust the concentration of the dried bioaerosol sample in actual operation. The utility model discloses an aspect provides dry, clean diluent gas for the dilution regulation of aerosol through cold machine and air cleaner, and on the other hand utilizes dry storehouse to obtain dry concentrated bioaerosol, and both mix and dilute, owing to do not have the interference of a large amount of small liquid drops in the hydrosol, can obtain the dry bioaerosol sample of different concentrations through gas flow controller 1 developments, accurately.
The droplet generator 5 can be a Collison sprayer, and when the particle size of the generated bioaerosol is larger (more than 2 micrometers), a clinically common liquid medicine atomizer can be used instead.
Planktonic bacteria species are various in the experiment, the characteristics are different, in order to avoid cross interference and prevent the air flow pipeline from being polluted by organisms, the device for researching the biological aerosol is also provided with a decontamination gas generator 8, and the outlet of the decontamination gas generator 8, the outlet of the air filter 4 and the inlet of the liquid drop generator 5 are respectively connected to a three-way valve 9 through gas pipelines. After the experiment is finished, the three-way valve 9 is opened, so that the decontamination gas generated by the decontamination gas generator 8 flows through an airflow pipeline of the device, and the purpose of a decontamination pipeline is achieved.
In the utility model, the decontamination gas generator 8 can be a chlorine dioxide gas disinfection device disclosed in the patent ZL201110104819.9 of the invention of China. The generation mode of the chlorine dioxide reaction is as follows:
2NaClO2+Cl2↑＝2NaCl+2ClO2↑
the disinfection is completed by utilizing the sterilization capability of chlorine dioxide in the decontamination process, reaction products after the disinfection are harmless to human bodies, and the decontamination gas remained in the pipeline can be discharged only by switching the three-way valve 9 to the main gas circuit and introducing clean air into the pipeline after the decontamination is finished.
The receiving device 7 is used as a terminal for preparing a bioaerosol sample, and has the main function of realizing dynamic storage and protection isolation of bioaerosol. The pressure in the receiving device 7 is tested by the pressure sensor, so that the interior of the box is kept in a negative pressure state, and the biological aerosol is prevented from leaking.
The receiving device 7 has 4 designed and used modes: the system comprises a sample injection mode, a sample mixing mode, a sample collection mode and a system self-cleaning mode.
In the sample injection mode, the bioaerosol inlet 71 of the receiving device 7 is opened, and the bioaerosol sample enters the inside of the receiving device 7 and is kept in a negative pressure state.
In the sample blending mode, the bioaerosol inlet 71 and the waste gas outlet 72 of the receiving device 7 are closed simultaneously, the fan attached in the receiving device 7 is in a working state, and bioaerosol is uniformly distributed in the receiving device 7 through airflow stirring for a certain time.
Sample collection mode: before a bioaerosol sample occurs, monitoring equipment to be tested is placed in the receiving device 7, and after the receiving device enters an acquisition mode, the equipment to be tested is operated through external remote control; the sample collection mode is typically used for parameter calibration and performance evaluation of bioaerosol related collection or monitoring equipment.
The system self-cleaning mode comprises the following steps: the chlorine dioxide gas generated by the decontamination gas generator 8 is utilized, namely, the decontamination gas generator 8 is started, the generated chlorine dioxide gas enters the receiving device 7, and then the attached fan in the receiving device 7 is started, so that the gas circulates in the box for a certain time to complete the self-purification of the internal environment of the box body.
Example 1
A device for bioaerosol studies, comprising: the device comprises a gas flow controller 1, an air compressor 2 for providing a gas source, a cold dryer 3 for removing moisture in air, an air filter 4 for removing suspended particles in the air, a Collison sprayer 5 for containing biological suspension, a drying bin 6 filled with silica gel particles, a receiving device 7 for receiving biological aerosol, and a gaseous chlorine dioxide disinfection device 8 for disinfecting the device. Wherein, the outlet of the air compressor is connected with the inlet of the cold dryer through a gas pipeline, and the outlet of the cold dryer is connected with the inlet of the air filter through a gas pipeline; the outlet of the air filter is divided into two air paths, one air path is connected with the air inlet of the Collison sprayer through a three-way valve, the other interface of the three-way valve is connected with the chlorine dioxide gas disinfection device through a gas pipeline, the outlet of the Collison sprayer is connected with the inlet of the drying bin through a gas pipeline, the outlet of the drying bin is connected with the bioaerosol inlet of the receiving device through a gas pipeline, the other air path at the outlet of the air filter is connected with the inlet of the gas flow controller through a gas pipeline, and the outlet of the gas flow controller is connected to the gas pipeline between the drying bin and the receiving device through a gas pipeline. The bioaerosol inlet and the waste gas outlet of the receiving device are respectively provided with a valve for controlling the opening of the inlet and the outlet.
Adopt 3 Andersen six grades of particulate matter fractional samplers to carry out biological aerosol sampling experiment to different positions, the sampling count result is the same basically, shows that the biological aerosol concentration stability and the uniformity of box inside are fine, satisfies biological aerosol experiment requirement.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A device for researching bioaerosol comprises an air source, a cold dryer, an air filter, a liquid drop generator, a drying bin, an air flow controller and a receiving device;
the air source, the cold dryer, the air filter, the liquid drop generator, the drying bin and the receiving device are sequentially connected; the inlet of the gas flow controller is connected with the outlet of the air filter, and the outlet of the gas flow controller is connected with the outlet of the drying bin.
2. The device for bioaerosol studies according to claim 1, characterized in that: the air source is an adjustable fan or an air compressor.
3. The device for bioaerosol studies according to claim 1, characterized in that: the drying bin is filled with solid desiccant.
4. Device for bioaerosol studies according to claim 3, characterized in that: the solid desiccant is silica gel, montmorillonite, anhydrous calcium chloride or anhydrous magnesium sulfate.
5. Device for bioaerosol studies according to claim 4, characterized in that: the solid desiccant is granular.
6. The device for bioaerosol studies according to claim 1, characterized in that: the drop generator is a Collison sprayer.
7. The device for bioaerosol studies according to claim 1, characterized in that: the receiving device is provided with a valve which can control the opening of the inlet and the outlet of the receiving device.
8. A device for bioaerosol studies according to any of claims 1 to 7, wherein: the device for researching the bioaerosol is also provided with a decontamination gas generator, and an outlet of the decontamination gas generator, an outlet of the air filter and an inlet of the liquid drop generator are connected through a three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920984768.5U CN210427283U (en) | 2019-06-27 | 2019-06-27 | Device for researching bioaerosol |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920984768.5U CN210427283U (en) | 2019-06-27 | 2019-06-27 | Device for researching bioaerosol |
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| CN210427283U true CN210427283U (en) | 2020-04-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112023840A (en) * | 2020-09-10 | 2020-12-04 | 苏州华达仪器设备有限公司 | Aerosol generator |
| CN113933217A (en) * | 2021-09-10 | 2022-01-14 | 广东工业大学 | Biological aerosol generating and balancing system and application thereof |
-
2019
- 2019-06-27 CN CN201920984768.5U patent/CN210427283U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112023840A (en) * | 2020-09-10 | 2020-12-04 | 苏州华达仪器设备有限公司 | Aerosol generator |
| CN113933217A (en) * | 2021-09-10 | 2022-01-14 | 广东工业大学 | Biological aerosol generating and balancing system and application thereof |
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