CN218445031U - Gauze mask bacterial protection effect detection device - Google Patents
Gauze mask bacterial protection effect detection device Download PDFInfo
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- CN218445031U CN218445031U CN202221822571.XU CN202221822571U CN218445031U CN 218445031 U CN218445031 U CN 218445031U CN 202221822571 U CN202221822571 U CN 202221822571U CN 218445031 U CN218445031 U CN 218445031U
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The utility model discloses a gauze mask bacterial protection effect detection device, place the first mould in the test chamber, take place the module through the aerosol and to the internal bacterium aerosol of carrying of cabin, the pipeline is passed through to the one end of breathing simulator and is connected with the first mould, the other end passes through the pipeline and is connected with the filter, first sampling module includes two sampling branch roads, all be equipped with fluorescence quantitative determination module and sampling pump on every sampling branch road, the end of giving vent to anger of every sampling branch road all inserts on the upstream pipeline of filter, the inlet end of one of them sampling branch road inserts on the pipeline between first mould and the breathing simulator, the inlet end of another sampling branch road and the inner chamber intercommunication of the cabin body. The detection device applies a fluorescent quantitative detection technology to rapidly detect the content of the bacterial aerosol in the outer side of the mask and the air in the head mould nasal cavity protected by the mask in the test chamber in real time, so that the detection efficiency is greatly improved.
Description
Technical Field
The utility model relates to a gauze mask bacterial filtration detects technical field, especially relates to an use fluorescence quantitative technique to carry out device that gauze mask bacterium protective effect detected.
Background
At present, the method for detecting the bacterial filtration efficiency for evaluating the mask bacterial protection effect generally comprises an Anderson sampling and colony culture counting method, sodium chloride aerosol is adopted to simulate the polluted environment, and the protection effect of the mask is analyzed by detecting the concentration of the bacterial aerosol inside and outside the mask worn on a head model. The method cannot correctly reflect the protection effect of the mask in the environment polluted by the bacterial aerosol, and the detection method has the advantages of complex operation, long time consumption and low efficiency, thereby greatly prolonging the detection period of the mask.
The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may contain prior art that does not constitute known technology to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
To the problem pointed out in the background art, the utility model provides a gauze mask bacterium protective effect detection device improves gauze mask bacterium protective effect's detection efficiency.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
the utility model provides a gauze mask bacterial protection effect detection device, include:
a head die is placed in a chamber body of the test chamber;
the aerosol generation module is used for providing bacterial aerosol into the cabin body;
one end of the breathing simulator is connected with the head die through a pipeline, and the other end of the breathing simulator is connected with the filter through a pipeline;
first sampling module, it includes two sampling branches, all is equipped with fluorescence quantitative determination module and sampling pump on every sampling branch, and the end of giving vent to anger of every sampling branch all inserts on the upstream pipeline of filter, the inlet end access of one of them sampling branch head mould with on the pipeline between the breathing simulator, the inlet end of another sampling branch with the inner chamber intercommunication of the cabin body.
In some embodiments of this application, still include the second sampling module, it includes two sampling branch roads, all is equipped with sample thief, two solenoid valve and sampling pump on every sampling branch road in proper order, and the end of giving vent to anger of every sampling branch road inserts on the upstream line of filter, the inlet end of one of them sampling branch road inserts head mould with on the pipeline between the breathing simulator, the inlet end of another sampling branch road with the inner chamber intercommunication of cabin body.
In some embodiments of the present application, the aerosol generation module includes a sprayer, a first branch and a second branch, a bacteria bottle and a peristaltic pump are arranged on the first branch, and a pump and a filter are arranged on the second branch.
In some embodiments of this application, the aerosol generation module still includes the antiseptic solution bottle, the antiseptic solution bottle with be equipped with three way solenoid valve between the peristaltic pump, the antiseptic solution bottle pass through the pipeline with three way solenoid valve is connected.
In some embodiments of the present application, a plurality of fans for uniformly mixing aerosol in the cabin body are disposed in the cabin body.
In some embodiments of the present application, the cabin further includes a purification module, which includes a first purification branch and a second purification branch, an air inlet and an air outlet are provided on the cabin, air inlet ends of the first purification branch and the second purification branch are both communicated with the air outlet, and an air outlet end of the second purification branch is communicated with the air inlet;
a control valve and a fan are arranged on the first purification branch;
a control valve and a constant temperature and humidity system are arranged on the second purification branch, and the constant temperature and humidity system is used for adjusting the temperature and the humidity of the aerosol in the cabin;
and a temperature and humidity sensor is arranged in the cabin body and is communicated with the constant temperature and humidity system.
In some embodiments of this application, be equipped with the transmission isolation window on the cabin body, the transmission isolation window includes interior window and the exterior window that the interval set up, interior window with be equipped with the ultraviolet lamp between the exterior window.
In some embodiments of the present application, a differential pressure sensor and a particle counter are disposed in the chamber.
Compared with the prior art, the utility model discloses an advantage is with positive effect:
the device for detecting the mask bacterial protection effect disclosed by the application adopts the LIF laser induced fluorescence quantification technology to detect the bacterial aerosol content in the outer side of the mask in a biological aerosol test chamber and in the air of the head mould nasal cavity protected by the mask;
the utility model discloses bacterium aerosol test chamber that gauze mask bacterium protective effect detection device established collects bacterium aerosol and takes place, the mixing, disappears and kills in the test chamber of an organic whole, can accurately simulate bacterium aerosol polluted environment, detects for gauze mask protective effect and provides effectual evaluation platform.
Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a mask bacteria protection effect detecting apparatus according to an embodiment;
reference numerals are as follows:
100-a first sampling module, 110-a fluorescence quantitative detection module, 120-a first sampling pump;
200-a second sampling module, 210-a sampler, 220-a second sampling pump and 230-a two-way solenoid valve;
300-test chamber, 110-third filter, 120-fourth filter, 130-third control valve;
400-aerosol generation module, 410-bacteria liquid bottle, 420-peristaltic pump, 430-sprayer, 440-pump, 450-second filter, 460-three-way electromagnetic valve, 470-disinfectant liquid bottle;
510-a first purification branch, 511-a first control valve, 512-a fan, 520-a second purification branch, 521-a constant temperature and humidity system, 522-a second control valve;
600-a head die;
700-breathing simulator, 710-first filter;
810-fan, 820-ultraviolet lamp, 830-glove hole, 840-observation window, 850-lighting lamp, 860-differential pressure sensor, 870-particle counter, 880-isolation transmission window and 890-temperature and humidity sensor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The embodiment discloses a mask bacteria protection effect detection device, referring to fig. 1, which mainly comprises a test chamber 300, an aerosol generation module 400, a breathing simulator 700, a first sampling module 100, and the like.
The test chamber 300 is used for providing a constant temperature and humidity test environment, and bacteria aerosol is conveyed into the chamber body through the aerosol generation module 400 for test.
The head die 600 is placed in the cabin body, and the head die 600 is sequentially connected with the breathing simulator 700 and the first filter 710 through pipelines.
The head model 600 is divided into a small-size head model, a medium-size head model, a large-size head model and a child head model according to the size, the material is mainly composed of a metal framework and rubber for simulating skin outside, the head model 600 can realize three moving states of static, dynamic and speech in the test process, and the actual protection effect of a person on microorganisms when wearing various types of masks is correctly simulated.
The breathing simulator 700 is capable of simulating human respiratory volume and respiratory rate, the respiratory volume can be set in the range of (10-100) L/min, and the respiratory rate can be set in the range of (10-40) times/min.
The first filter 710 is used to filter the exhausted gas to avoid polluting the environment.
The first sampling module 100 includes two sampling branches, each sampling branch is provided with a fluorescence quantitative detection module 110 and a sampling pump (denoted as a first sampling pump 120), and an air outlet end of each sampling branch is connected to an upstream pipeline of the first filter 710. The air inlet end of one sampling branch is connected to a pipeline between the head mould 600 and the breathing simulator 700 and used for collecting the content of bacterial aerosol in nasal air of the head mould protected by the mask, and the filtering efficiency of bacteria of the mask is rapidly detected in real time by using an instrument direct reading or sampling test method and is applied to the evaluation of the protection effect of the mask; and the air inlet end of the other sampling branch is communicated with the inner cavity of the cabin body and is used for collecting the content of the bacterial aerosol in the test cabin.
The fluorescence quantitative detection module 110 monitors the bioaerosol in the test chamber in real time through fluorescence spectrum characteristics based on the principle of laser-induced fluorescence.
Compared with the conventional Anderson sampling method, the fluorescence quantitative detection method has the following advantages: (1) the detection sensitivity is high; (2) The photoelectric detection principle is adopted, so that the device has great advantages in detection speed, and the detection efficiency is greatly improved; (3) real-time online detection can be carried out; (4) Non-invasive detection, and no damage to the sample mask. Therefore, the laser-induced fluorescence technology can replace the traditional bacteria culture method, and the rapid detection of the mask bacteria protection effect is realized.
In some embodiments of the present application, the mask bacterial protection effect detection apparatus further includes a second sampling module 200, which also includes two sampling branches, each sampling branch is sequentially provided with an anderson sampler 210, a two-way solenoid valve 230, and a sampling pump (denoted as a second sampling pump 220), an air outlet end of each sampling branch is connected to an upstream pipe of the first filter 710, and an air inlet end of one sampling branch is connected to a pipe between the head mold 600 and the breathing simulator 700, and is configured to collect bacterial aerosol in nasal air of the head mold protected by the mask; the air inlet end of the other sampling branch is communicated with the inner cavity of the cabin body and is used for collecting bacterial aerosol in the test cabin.
The two paths of bacterial aerosols collected by the Anderson sampler 210 are respectively collected on trypsin soybean agar, colony units (positive holes) formed by the bacterial particle aerosols are counted through an artificial counting instrument or a colony counting instrument after 24 hours of culture, the colony units are converted into possible impact particle numbers according to a conversion table obtained through empirical values, and the converted numerical values are used for calculating the bacterial filtration efficiency of the mask and are applied to the evaluation of the bacterial protection effect of the mask.
When the first sampling module 100 and the second sampling module 200 are simultaneously arranged in the mask bacterial protection effect detection device, according to comparison and verification of two detection methods, the fluorescence quantitative technology can correctly respond to the change of the content of bacterial microorganisms in a biological aerosol test chamber, the change trend of the indication value of the fluorescence quantitative technology is highly consistent with that of the Anderson sampling method, when a standard strain is used as a bacterial aerosol pollution source, the difference of the obtained test results under different pollution concentrations is not large, compared with the Anderson sampling method, colony culture and counting time are not needed, and the analysis efficiency of the mask bacterial protection effect is greatly improved.
The applicability of the fluorescence quantitative technology in the field of bioaerosol detection is explored through comparison experiments of the fluorescence quantitative technology and the Anderson sampling detection method.
In some embodiments, the aerosol generating module 400 includes a sprayer 430, a first branch with a bacteria bottle 410 and a peristaltic pump 420, and a second branch with a pump 440 and a second filter 450.
The bacterial aerosol is delivered into the cabin body through the sprayer 430, and the biological bacterial aerosol with controllable particle size and spraying amount is generated by adjusting the flow rate of the sprayer 430 and the flow rate of the peristaltic pump 420.
In some embodiments of the present application, the aerosol generating module 400 further includes a disinfectant bottle 470, a three-way solenoid valve 460 is disposed between the bacteria liquid bottle 410 and the peristaltic pump 120, and the disinfectant bottle 470 is connected to the three-way solenoid valve 460 through a pipeline.
Through the control of the three-way electromagnetic valve 460, the disinfectant bottle 470 can deliver disinfectant into the cabin through the sprayer 430, so as to disinfect and sterilize the cabin.
In some embodiments of the present application, an ultraviolet lamp 820 is disposed at the top of the cabin for irradiating the cabin with ultraviolet light for sterilization. The ultraviolet lamp sterilization and the disinfection of the disinfectant are matched, so that the sterilization efficiency and effectiveness in the cabin body are improved.
In some embodiments of the present application, the cabin body is provided with a plurality of fans 810 for uniformly mixing aerosol in the cabin body, so as to ensure uniformity of aerosol in the cabin body. In this example, the fans 810 are provided in three numbers, one of which is provided at the top of the cabin and the other two of which are provided at both sides of the bottom of the cabin and are disposed in an inclined manner.
In some embodiments of this application, this gauze mask bacterial protection effect detection device still includes the purification module, and it includes that first purification branch road 510 and second purify branch road 520, is equipped with air intake and air outlet in the cabin body, and air intake department is equipped with third filter 110, and air outlet department is equipped with fourth filter 120, and first purification branch road 510 and second purify the inlet end of branch road 520 all with the air outlet intercommunication, and the second purifies the outlet end and the air intake intercommunication of branch road 520. The first purification branch 510 is provided with a first control valve 511 and a fan 512. Two second control valves 522 and a constant temperature and humidity system 521 are arranged on the second purification branch 520, and the constant temperature and humidity system 521 adjusts the temperature and humidity of the aerosol in the cabin. The constant temperature and humidity system is conventional in the prior art, and the specific structure of the constant temperature and humidity system is not specifically described in this embodiment. The cabin body is internally provided with a temperature and humidity sensor 890, and the temperature and humidity sensor 890 is communicated with the constant temperature and humidity system 521.
The temperature and the humidity of the cabin are detected and fed back in real time through the temperature and humidity sensor 890, the system controls the operation of the constant temperature and humidity system 521 according to the detection data of the temperature and humidity sensor 890, so as to realize a stable constant temperature and humidity environment in the cabin, and the fluctuation degree of the set temperature is less than or equal to +/-0.5 ℃ and the fluctuation degree of the relative humidity is less than or equal to +/-3% in the temperature range of 20-25 ℃ and the humidity range of 50-70%.
And a third control valve 130 is arranged on an air inlet pipeline connected with the air inlet, and the background environment in the cabin and the polluted environment after the test are purified are realized by controlling the flow of the third filter 110 and the third control valve 130.
The gas in the cabin is divided into two paths after flowing out from the air outlet, one path flows through the first purification branch 510, and the ventilation purification amount in the cabin is regulated and controlled by controlling the air volume of the fan 512; the other path of the water flows through a second purification branch 520, is subjected to temperature and humidity regulation by a constant temperature and humidity system 521 and then returns to the cabin for circulation,
in this example, the first control valve 511, the second control valve 522, and the third control valve 130 are electric butterfly valves.
In some embodiments of the present application, the cabin body is provided with a glove hole 830, an observation window 840 and a transmission isolation window 880, the transmission isolation window 880 comprises an inner window and an outer window which are arranged at intervals, the inner window and the outer window are transparent windows, the inner window can be opened and closed from the inside of the cabin body, the outer window can be opened and closed from the outside of the cabin body, and the inner window and the outer window can be closed at the same time but cannot be opened at the same time.
When the cabin door is closed, after the sampling is finished by disinfection evaluation/sampling efficiency evaluation, the sampler is placed in the isolation window through the gloves in the cabin, so that the influence of further disinfection in the cabin on the biological aerosol in the sampler is reduced.
An ultraviolet lamp is arranged between the inner window and the outer window to sterilize the space.
In some embodiments of the present application, a pressure difference sensor 860 is disposed in the cabin body for monitoring a pressure difference in the cabin at any time, and when the airtightness of the cabin body is evaluated, the pressure difference in the cabin is recorded to study whether the airtightness of the cabin body meets a test requirement.
In some embodiments, a particle counter 870 is disposed in the chamber for determining the aerosol concentration and particle size distribution in the test chamber.
In some embodiments of the present application, the cabin has an illumination lamp 850 disposed therein for illuminating the cabin.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A mask bacterial protection effect detection device, characterized by includes:
a head die is placed in a chamber body of the test chamber;
an aerosol generating module for providing a bacterial aerosol into the enclosure;
one end of the breathing simulator is connected with the head die through a pipeline, and the other end of the breathing simulator is connected with the filter through a pipeline;
first sampling module, it includes two sampling branch roads, all is equipped with fluorescence quantitative determination module and sampling pump on every sampling branch road, and the end of giving vent to anger of every sampling branch road all inserts on the upstream pipeline of filter, the inlet end access of one of them sampling branch road the head mould with on the pipeline between the breathing simulator, the inlet end of another sampling branch road with the inner chamber intercommunication of the cabin body.
2. The mask bacteria protective effect detecting device according to claim 1,
still include the second sampling module, it includes two sampling branch roads, all is equipped with sample thief, two solenoid valve and sampling pump on every sampling branch road in proper order, and the end of giving vent to anger of every sampling branch road inserts on the upstream pipeline of filter, the inlet end access of one of them sampling branch road the head mould with on the pipeline between the breathing simulator, the inlet end of another sampling branch road with the inner chamber intercommunication of the cabin body.
3. The mask bacteria protective effect detecting device according to claim 1 or 2,
the aerosol generation module comprises an atomizer, a first branch and a second branch, wherein a bacteria liquid bottle and a peristaltic pump are arranged on the first branch, and a pump and a filter are arranged on the second branch.
4. The mask bacteria protective effect detecting device according to claim 2,
the aerosol generation module further comprises a disinfectant bottle, a three-way electromagnetic valve is arranged between the disinfectant bottle and the peristaltic pump, and the disinfectant bottle is connected with the three-way electromagnetic valve through a pipeline.
5. The mask bacteria protective effect detecting device according to claim 1 or 2,
the cabin body is internally provided with a plurality of fans for uniformly mixing the aerosol in the cabin body.
6. The mask bacteria protective effect detecting device according to claim 1 or 2,
the cabin body is provided with an air inlet and an air outlet, the air inlet ends of the first purification branch and the second purification branch are communicated with the air outlet, and the air outlet end of the second purification branch is communicated with the air inlet;
a control valve and a fan are arranged on the first purification branch;
a control valve and a constant temperature and humidity system are arranged on the second purification branch, and the constant temperature and humidity system is used for adjusting the temperature and humidity of the aerosol in the cabin;
and a temperature and humidity sensor is arranged in the cabin body and is communicated with the constant temperature and humidity system.
7. The mask bacteria protective effect detecting device according to claim 1 or 2,
the cabin body is provided with a transmission isolation window, the transmission isolation window comprises an inner window and an outer window which are arranged at intervals, and an ultraviolet lamp is arranged between the inner window and the outer window.
8. The mask bacteria protective effect detecting device according to claim 1 or 2,
a pressure difference sensor and a particle counter are arranged in the cabin body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221822571.XU CN218445031U (en) | 2022-07-15 | 2022-07-15 | Gauze mask bacterial protection effect detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221822571.XU CN218445031U (en) | 2022-07-15 | 2022-07-15 | Gauze mask bacterial protection effect detection device |
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| Publication Number | Publication Date |
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| CN218445031U true CN218445031U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221822571.XU Active CN218445031U (en) | 2022-07-15 | 2022-07-15 | Gauze mask bacterial protection effect detection device |
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| CN (1) | CN218445031U (en) |
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- 2022-07-15 CN CN202221822571.XU patent/CN218445031U/en active Active
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