CN202751618U - Formaldehyde steaming and circulating sterilizer for in situ sterilization of exhaust high efficiency particulate air (HEPA) filters - Google Patents
Formaldehyde steaming and circulating sterilizer for in situ sterilization of exhaust high efficiency particulate air (HEPA) filters Download PDFInfo
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- CN202751618U CN202751618U CN 201220448892 CN201220448892U CN202751618U CN 202751618 U CN202751618 U CN 202751618U CN 201220448892 CN201220448892 CN 201220448892 CN 201220448892 U CN201220448892 U CN 201220448892U CN 202751618 U CN202751618 U CN 202751618U
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Abstract
The utility model belongs to the technical field of sterilization devices, relates to sterilization to HEPA filters, and particularly relates to a formaldehyde steaming and circulating sterilizer for in situ sterilization of exhaust HEPA filters. The sterilizer is composed of a formaldehyde/ammonia water generator, a humidifier, a circulating fan, a sterilizer front chamber, a sterilizer rear chamber, a perforated separation board between the sterilizer front chamber and the sterilizer rear chamber and a biological indicator placing detection blind end. The sterilizer front chamber and the sterilizer rear chamber are separated by the perforated separation board, one end of the sterilizer front chamber is connected with the biological indicator placing detection blind end, the formaldehyde/ammonia water generator and the humidifier are placed in the sterilizer front chamber sequentially, and the circulating fan is arranged in the sterilizer rear chamber. Application results indicate that the operation of the sterilizer comprises a formaldehyde generation process, a circulation penetrating process and an ammonia water neutralization process. The sterilizer is simple in structure and convenient to use, has small damages to human and can be applied to in situ sterilization of HEPA filters in BSL-3 laboratories.
Description
Technical field
This utility model belongs to the decontaminating apparatus technical field, relates to for the HEPA filter is carried out disinfection, and is specifically related to the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ; This sterilizing machine comprises that formaldehyde occurs, circulation penetrates, the operation of three strokes of ammonia neutralization, can be used for BSL-3 laboratory HEPA filter disinfect in situ.
Background technology
The biological safety protection level is three grades laboratory (Biosafety Level 3laboratory, the BSL-3 laboratory) be the technical guarantee platform of highly pathogenic pathogenic microorganism research and detection, classifying as the correlational studyes such as the zoogenetic infection of Equations of The Second Kind pathogenic microorganism, a large amount of living cells cultivations should carry out at the BSL-3 laboratory at " the pathogenic microorganism register that infect in the human world ".Above-mentioned pathogenic microorganism can cause the mankind or the serious infectious disease of animal, than being easier to direct or being connected on the microorganism of propagating between person to person, animals and human beings, animal and animal, comprise sars coronavirus, high pathogenic avian influenza virus, HIV (human immunodeficiency virus) (I type and II type), Bacillus anthracis, mycobacterium tuberculosis, Yersinia pestis etc.Stipulate according to " pathogenic microorganism laboratory Biosafety management regulations " (State Council's the 424th command), after the BSL-3 laboratory need meet national biocontainment laboratory system planning and fulfil relevant examination and approval procedures in accordance with the law, through the approval of science and technology authorities of State Council, build according to national biocontainment laboratory Building technology standard.The experimental activity that described BSL-3 laboratory is engaged in need meet the regulation of State Council's health (perhaps veterinary) authorities, and according to the approval (laboratory that China 2009 year before built all according to the content of GB19489-2004 version approve) of national standard " laboratory bio-safety General Requirement " by CNAS (CNAS).
Along with the raising of China to the construction requirements of biocontainment laboratory, China's biocontainment laboratory is built and the needs of management in order to adapt to, further coordinate mutually with international standard and guide, promote development and exchange, on the basis that GB19489-2004 version standard is revised, GB19489-2008 version standard was implemented from 1 day July in 2009 and alternative GB19489-2004 version, and required the BSL-3 laboratory of China to finish new national standard before in July, 2010 to recognize convertible evaluation.The BSL-3 laboratory that new nation's standard-required is built " should carry out disinfection to air draft HEPA filter in position and sterilize and leak detection ".The transformation of the facility system that also must be correlated with of BSL-3 laboratory by approval just can meet the requirement of this standard 6.3.3.8 clause according to the GB19489-2004 version.For reaching the requirement of new national standard, high efficiency particulate air filter (High efficiency particulate air filter in the laboratory guard plot is arranged, the HEPA filter) the air exhaust box structural reform is made and is adopted the Camfil Farr(U.S.) the carried out disinfect in situ of producing and the equipment CamContain Ceil-X wall mounted room-side exhaust containment of scanning leak detection, can hunt leak to air draft HEPA filter in position by connecting the instruments such as particle counter; Yet, though the said goods has disposed supporting test cover (Universal Test Shroud, UTS), without the corollary equipment of corresponding disinfect in situ; When the BSL-3 laboratory need to be changed air draft HEPA filter, need to guarantee the bio-safety of HEPA filter thorough disinfection guarantee laboratory to be replaced.Therefore, concrete condition according to laboratory, need design cycle sterilization model machine to connect this equipment, by room temperature formaldehyde vapor recycle fumigation method, utilize bacstearothermophilus, bacillus subtilis, mycobacterium smegmatis, four kinds of biological indicators of staphylococcus aureus, the effect of HEPA filter disinfect in situ in the laboratory core space is verified.
Current, the method of BSL-3 lab space sterilization mainly contains low temperature formaldehyde steam fumigation (low-temperature steam with formaldehyde sterilization, LTSF), ethylene oxide gas sterilization (ethylene oxide gas, EOG sterilization), hydrogen peroxide gas sterilization (hydrogen peroxide gas plasma, HPGP sterilization); Contrast above-mentioned 3 kinds of gas depoisoning methods as can be known, HPGP sterilization is better than LTSF and EOG, but needs special hydrogen peroxide gasification equipment, and is expensive and can not popularize; And EOG is strong to skin, neural damage and carciongenic potency, therefore, usually selects formaldehyde as disinfectant.Thereby described formaldehyde passes through the nitrogen-atoms alkylation killing microorganisms on the amino on the protein, mercapto groups and the purine base ring; In Northern Europe, Germany, Britain and developing country, the fumigation of low temperature formaldehyde steam is widely used in the sterilization of heat labile medical apparatus and instruments and adnexa thereof: be interrupted injected water steam and formaldehyde in hermetic container, keep concentration of formaldehyde and be in 70 ~ 75 ℃ in 8 ~ 16mg/l, vapor (steam) temperature, to reach Disinfection Effect.Described method is easy and simple to handle, quick, inexpensive, can be used for killing the stronger atrophy bacillus cereus of vegetative bacteria, mycobacteria and resistance, bacstearothermophilus etc.
At present, in the urgent need to a kind of formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ.
Summary of the invention
The purpose of this utility model provides a kind of formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ; This sterilizing machine comprises that formaldehyde occurs, circulation penetrates, the operation of three strokes of ammonia neutralization, can be used for BSL-3 laboratory HEPA filter disinfect in situ.
Sterilizing machine described in the utility model is a kind of safety in situ disinfection device that can be used for CamContain Ceil-X wall mounted room-side exhaust containment, is specifically related to comprise that formaldehyde occurs, circulation penetrates, three strokes of ammonia neutralization; The applied formaldehyde fumigation circulation of this sterilizing machine sterilization can effectively be sterilized to air draft HEPA filter thoroughly, can be used for BSL-3 laboratory HEPA filter disinfect in situ.
Particularly, formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ of the present utility model, it is characterized in that, by behind formaldehyde/ammonia generator 1, humidifier 2, circulating fan 3, sterilizing machine cup 4, the sterilizing machine between chamber 5, chamber, front and back dividing plate 6 with holes and biological indicator place and detect cecum 7 and form; Separated by dividing plate 6 with holes between the chamber, front and back between the chamber 5 behind described sterilizing machine cup 4, the sterilizing machine, these sterilizing machine cup 4 one ends connect the biological indicator and place detection cecum 7, described formaldehyde/ammonia generator 1 and humidifier 2 place in the sterilizing machine cup 4 in order, and circulating fan 3 places behind the sterilizing machine in the chamber 5;
In this utility model, described formaldehyde/ammonia generator 1 is the equipment of disinfectant generation and nertralizer generation; It can be controlled in order formaldehyde/ammonia and open volatilization formation according to disinfecting process;
In this utility model, described humidifier 2 is the equipment to the circulatory fumigation gas humidification, can carry out humidification to the formaldehyde steam of volatilization;
In this utility model, described circulating fan 3 penetrates the equipment of HEPA filter for driving the sterilizing gas circulation, can drive formaldehyde steam and penetrate the HEPA filter, thereby form circulating of air-flow; Among the embodiment of the present utility model, the TSK II Series Centrifugal formula pipeline fan TSK II 200L that described circulating fan 3 adopts Ke Luge company to produce, exhaust air rate can reach 1045m
3/ h, power acquisition AC 100-240V/50-60Hz, peak power is 201W, maximum (top) speed 2700rpm, noise are 58dB;
In this utility model, chamber 5 is the shell of this sterilizing machine behind described sterilizing machine cup 4, the sterilizing machine, its overall dimensions is 600 * 300 * 450mm, the whole 304# rustless steel that adopts is made, dividing plate 6 with holes between the chamber before and after establish the centre, wherein, formaldehyde/ammonia generator 1, humidifier 2 place in the sterilizing machine cup, and circulating fan 3 places behind the sterilizing machine in the chamber 5;
Formaldehyde occurs, ammonia occurs, the air-flow humidification occurs at described sterilizing machine cup 5, and wherein, cup sterilizing machine cup 5 is initially the malleation section what formaldehyde occured;
Produce air-flow after circulating fan 3 starts, drive formaldehyde steam and penetrate the HEPA filter, wherein, chamber 5 is negative pressure section after circulating fan is opened behind the described sterilizing machine;
In this utility model, dividing plate 6 with holes is divided into chamber 5 behind sterilizing machine cup 4 and the sterilizing machine with this sterilizing machine between chamber, described front and back; Be densely covered with tiny little circular hole between this chamber, front and back on the dividing plate 6 with holes, pass through circulating fan thereby formaldehyde steam is the laminar flow shape;
In this utility model, described biological indicator places and detects cecum 7 is biological indicator's rest area, is used to indicate the sterilization effect of circulation disinfectant program; Its whole 304# rustless steel that adopts is made; This biological indicator places and detects cecum 7 and can hold sterilization effect indicator bacteria sheet, thereby provides evidence for the sterilization effect of judgement HEPA filter.
Among the embodiment of the present utility model, the FA-50Y type formol fumigating sterilizer that described formaldehyde/ammonia generator 1 adopts Beijing gram force Ai Er biology laboratory Engineering Co., Ltd to produce, this steriliser is comprised of two containers and an electric control box, wherein, a container holds formaldehyde liquid, another holds ammonia, electric control box implementation procedure control function; This steriliser overall dimensions is 235 * 153 * 110mm, power acquisition 220V ± 10%, 50Hz, and power 200w+200w, single tank body volume can arrive 100mL, adopts the eclipsed form gas spout; Its whole 304# rustless steel that adopts is made, and can intuitively understand disinfecting process by display lamp;
The AOSU7146 Travel Star humidifier that described humidifier 2 adopts AIR-O-SWISS Switzerland wind company to produce, its overall dimensions is: 110 * 65 * 80mm, power acquisition AC 100-240V/50-60Hz, power are 15W, the maximum 50m that is fit to of maximum humidification amount: 100g/hr
3, maximum water capacity 500mL, noise are 25dB.
Sterilizing machine described in the utility model is connected by the sterilization interface of pipeline with the air draft casing of air draft HEPA filter.
During use, the disinfectant program of sterilizing machine described in the utility model is divided into 3 stages: (1) formaldehyde gas occurs, and injects respectively formalin and ammonia to formol fumigating sterilizer, injects formalin 45ml/m
3(the about 16mg/L of formaldehyde gas ratio in disinfection space), heated volatile is complete to the formaldehyde volatilization, opens simultaneously the humidifier humidification, so that formaldehyde vapor sterilization system humidity is greater than 70%; (2) circulation penetrates disinfecting process, starts circulating fan, and the formaldehyde sterilizing gas passes the HEPA filter along the air draft direction under blower fan drives; (3) in the ammonia neutralization stage, close circulating fan, open the ammonia generation stroke of formol fumigating sterilizer, after the ammonia volatilization is complete, the ON cycle blower fan, continuous service a period of time to formaldehyde steam is neutralized fully.
Use is the result show, this sterilizing machine continues circulation and penetrates operation 2 hours and 12 hours, place the cecum of sterilization model machine pipeline with staphylococcus aureus bacterium sheet, mycobacterium smegmatis bacterium sheet, bacstearothermophilus bacterium sheet, hay spore black mutation bacterium sheet, connect air draft HEPA filter box-body and form sealing and circulating, detect the Disinfection Effect of the stifling circulation of formaldehyde steam; The result shows, formaldehyde vapor recycle sterilization 2 hours, staphylococcus aureus bacterium sheet, mycobacterium smegmatis bacterium sheet (10
7The CFU/ sheet) cultivate after the culture fluid clear, and bacstearothermophilus bacterium sheet, hay spore black mutation bacterium sheet cultivate after the visible a large amount of bacterial growths of culture fluid (bacterium liquid is muddy); The fumigation of formaldehyde steam after 12 hours bacillus stearothermophilus bacterium sheet, hay spore black mutation bacterium sheet culture fluid be the clear shape, have no bacterial growth; Therefore, this sterilizing machine can be used for BSL-3 laboratory HEPA filter disinfect in situ.
Sterilizing machine described in the utility model has the following advantages:
(1) described sterilizing machine is a kind of simple in structure, easy to use, BSL-3 laboratory core space air draft HEPA filter decontaminating apparatus that effect is superior;
(2) this sterilizing machine adopts ripe formaldehyde fumigation disinfection technology;
(3) human body being had the formaldehyde steam of injury can be by efficient neutralization, thereby reduces the infringement to human body;
(4) this sterilizing machine has remedied the BSL-3 laboratory and has lacked the shortcoming that air draft HEPA filter disinfect in situ sealing and circulating penetrates sterilizing equipment decontaminating apparatus.
For the ease of understanding, below will this utility model be described in detail by concrete the drawings and specific embodiments.It needs to be noted that these descriptions only are exemplary descriptions, do not consist of the restriction to this utility model scope.According to the discussion of this description, many variations of the present utility model, change all are apparent concerning one of ordinary skill in the art.
Description of drawings
Fig. 1 is the operation principle structure chart of sterilizing machine described in the utility model,
Wherein, 1 for formaldehyde/ammonia generator, 2 for humidifier, 3 for circulating fan, 4 for sterilizing machine cup, 5 for placing the detection cecum for the biological indicator for dividing plate with holes between the chamber, front and back, 7 in chamber behind the sterilizing machine, 6.
Fig. 2 is BSL-3 laboratory core space sketch map,
Wherein, 21 is airtight valve, and 22 are air draft HEPA filter, and 23 is test cover UTS, the 24th, and sterilizing machine described in the utility model.
Specific embodiment
Embodiment 1
As shown in Figure 1, this is used for the formaldehyde fumigation circulating disinfecting machine of air draft HEPA filter disinfect in situ, by behind formaldehyde/ammonia generator 1, humidifier 2, circulating fan 3, sterilizing machine cup 4, the sterilizing machine between chamber 5, chamber, front and back dividing plate 6 with holes and biological indicator place and detect cecum 7 and form; Separated by dividing plate 6 with holes between the chamber, front and back between the chamber 5 behind described sterilizing machine cup 4, the sterilizing machine, these sterilizing machine cup 4 one ends connect the biological indicator and place detection cecum 7, described formaldehyde/ammonia generator 1 and humidifier 2 place in the sterilizing machine cup 4 in order, and circulating fan 3 places behind the sterilizing machine in the chamber 5;
Described formaldehyde/ammonia generator 1 is the equipment that disinfectant occurs and nertralizer occurs, and can control in order formaldehyde/ammonia and open volatilization formation according to disinfecting process; The FA-50Y type formol fumigating sterilizer that this formaldehyde/ammonia generator 1 adopts Beijing gram force Ai Er biology laboratory Engineering Co., Ltd to produce, described steriliser is comprised of two containers and an electric control box, wherein, a container holds formaldehyde liquid, another holds ammonia, electric control box implementation procedure control function; This steriliser overall dimensions is 235 * 153 * 110mm, power acquisition 220V ± 10%, 50Hz, and power 200w+200w, single tank body volume can arrive 100mL, adopts the eclipsed form gas spout; Its whole 304# rustless steel that adopts is made, and can intuitively understand disinfecting process by display lamp;
Described humidifier 2 is the equipment to the circulatory fumigation gas humidification, can carry out humidification to the formaldehyde steam of volatilization; The AOSU7146 Travel Star humidifier that this humidifier 2 adopts AIR-O-SWISS Switzerland wind company to produce, its overall dimensions is: 110 * 65 * 80mm, power acquisition AC 100-240V/50-60Hz, power are 15W, the maximum 50m that is fit to of maximum humidification amount: 100g/hr
3, maximum water capacity 500mL, noise are 25dB.
Described circulating fan 3 penetrates the equipment of HEPA filter for driving the sterilizing gas circulation, can drive formaldehyde steam and penetrate the HEPA filter, thereby form circulating of air-flow; The TSK II Series Centrifugal formula pipeline fan TSK II 200L that this circulating fan 3 adopts Ke Luge company to produce, exhaust air rate can reach 1045m
3/ h, power acquisition AC 100-240V/50-60Hz, peak power is 201W, maximum (top) speed 2700rpm, noise are 58dB;
Formaldehyde occurs, ammonia occurs, the air-flow humidification occurs at described sterilizing machine cup 5, and wherein, cup sterilizing machine cup 5 is initially the malleation section what formaldehyde occured;
Produce air-flow after circulating fan 3 starts, drive formaldehyde steam and penetrate the HEPA filter, wherein, chamber 5 is negative pressure section after circulating fan is opened behind the described sterilizing machine;
Described biological indicator places and detects cecum 7 is biological indicator's rest area, is used to indicate the sterilization effect of circulation disinfectant program; Its whole 304# rustless steel that adopts is made; This biological indicator places and detects cecum 7 and can hold sterilization effect indicator bacteria sheet, thereby provides evidence for the sterilization effect of judgement HEPA filter.
This sterilizing machine is connected by the sterilization interface of pipeline with the air draft casing of air draft HEPA filter.
During use, disinfectant program comprises 3 stages: (1) formaldehyde gas occurs, and injects respectively formalin and ammonia to formol fumigating sterilizer, injects formalin 45ml/m
3(the about 16mg/L of formaldehyde gas ratio in disinfection space), heated volatile is complete to the formaldehyde volatilization, opens simultaneously the humidifier humidification, so that formaldehyde vapor sterilization system humidity is greater than 70%; (2) circulation penetrates disinfecting process, starts circulating fan, and the formaldehyde sterilizing gas passes the HEPA filter along the air draft direction under blower fan drives; (3) in the ammonia neutralization stage, close circulating fan, open the ammonia generation stroke of formol fumigating sterilizer, after the ammonia volatilization is complete, the ON cycle blower fan, continuous service a period of time to formaldehyde steam is neutralized fully.
As shown in Figure 2, connect the sterilization model machine and be connected with the sterilization interface of CamContain air draft casing, sterilization effect indicator bacteria sheet bacstearothermophilus, hay spore black mutation bacterium sheet and mycobacterium smegmatis, staphylococcus aureus bacterium sheet are positioned over respectively in the detection cecum of front, bottom surface, end face, side and disinfectant of HEPA filter air draft casing to be sterilized medial wall.
Behind the formaldehyde vapor recycle disinfective action 12h, take out the bacterium sheet for detection of HEPA filter disinfect in situ, behind the cultivation 24h; The bacterium sheet of mycobacterium smegmatis and staphylococcus aureus is all without bacterial adhesion growth, culture fluid clear; The bacstearothermophilus culture fluid is the purple clarification, has no the antibacterial of bacterium sheet apposition growth, continues to cultivate 144h, has no bacterial growth in the culture fluid; Hay spore black mutation culture fluid is light yellow clarification, has no the antibacterial of bacterium sheet apposition growth, continues to cultivate 144h, has no bacterial growth in the culture fluid (as shown in table 1); The HEPA filter is after the sterilization of formaldehyde vapor sterilization, and to the bacterium sheet of 4 positions, the every kind of bacterium sheet in each position got 3 samples and cultivated, and the result shows that the cultivation results of 4 positions is consistent, without obvious growth differences; To the bacterium sheet of the front that is positioned over HEPA filter air draft casing medial wall, bottom surface, end face, side, carry out parallelly cultivate simultaneously, it is consistent that each organizes cultivation results.
The result shows, this sterilizing machine at ambient temperature, the formaldehyde vapour concentration is 16mgL, relative humidity 70% is kept circulation disinfecting time 12h, can effectively kill 10
5~ 10
6Bacstearothermophilus and bacillus subtilis reach the purpose of HEPA filter disinfect in situ.
The assessment of table 1 room temperature formalin vapor recycle fumigation effect
* B.S bacillus stearothermophilus bacterium, B.SvN bacillus subtilis bacterium, M.S mycobacterium smegmatis, S.A staphylococcus aureus,
* "+" expression has bacterial growth after cultivating and finishing.It is rear without bacterial growth that end is cultivated in "-" expression
* * does not pass through the bacterium sheet of sterilization as negative control group
* * * is through 121 ℃, and the bacterium sheet of 15min high pressure steam sterilization is as positive controls.
Claims (8)
1. formaldehyde fumigation circulating disinfecting machine that is used for air draft HEPA filter disinfect in situ, it is characterized in that, by behind formaldehyde/ammonia generator (1), humidifier (2), circulating fan (3), sterilizing machine cup (4), the sterilizing machine between chamber (5), chamber, front and back dividing plate with holes (6) and biological indicator place and detect cecum (7) and form; Separated by dividing plate with holes (6) between the chamber, front and back between chamber (5) behind described sterilizing machine cup (4), the sterilizing machine, these sterilizing machine cup (4) one ends connect the biological indicator and place detection cecum (7), described formaldehyde/ammonia generator (1) and humidifier (2) place in the sterilizing machine cup (4) in order, and circulating fan (3) places behind the sterilizing machine in the chamber (5).
2. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that, described formaldehyde/ammonia generator (1) is comprised of two containers and an electric control box, wherein, a container holds formaldehyde liquid, another holds ammonia, electric control box implementation procedure control function; The overall dimensions of this formaldehyde/ammonia generator (1) is 235 * 153 * 110mm, power acquisition 220V ± 10%, 50Hz, and power 200w+200w, single tank body volume is 100mL, adopts the eclipsed form gas spout; Its whole 304# rustless steel that adopts is made.
3. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that, the overall dimensions of described humidifier (2) is: 110 * 65 * 80mm, power acquisition AC 100-240V/50-60Hz, power is 15W, and humidification amount: 100g/hr is fit to 50m
3, water capacity 500mL, noise are 25dB.
4. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that the exhaust air rate of described circulating fan (3) is 1045m
3/ h, power acquisition AC100-240V/50-60Hz, power are 201W, rotating speed 2700rpm, noise are 58dB.
5. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that chamber (5) are the shell of sterilizing machine behind described sterilizing machine cup (4), the sterilizing machine, overall dimensions is 600 * 300 * 450mm.
6. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that, be densely covered with tiny little circular hole between chamber, described front and back on the dividing plate with holes (6).
7. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that described biological indicator places detection cecum (7) and adopts the 304# rustless steel to make, and holds the indicator bacteria sheet.
8. by the formaldehyde fumigation circulating disinfecting machine for air draft HEPA filter disinfect in situ claimed in claim 1, it is characterized in that described sterilizing machine is connected by the sterilization interface of pipeline with the air draft casing of air draft HEPA filter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220448892 CN202751618U (en) | 2012-09-04 | 2012-09-04 | Formaldehyde steaming and circulating sterilizer for in situ sterilization of exhaust high efficiency particulate air (HEPA) filters |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220448892 CN202751618U (en) | 2012-09-04 | 2012-09-04 | Formaldehyde steaming and circulating sterilizer for in situ sterilization of exhaust high efficiency particulate air (HEPA) filters |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103690979A (en) * | 2013-12-23 | 2014-04-02 | 北京克力爱尔生物实验室工程有限公司 | Formalin neutralization box |
| CN106267269A (en) * | 2016-09-14 | 2017-01-04 | 杨凌金海生物技术有限公司 | A kind of fumatorium structure |
| CN109125767A (en) * | 2018-09-17 | 2019-01-04 | 中国电子系统工程第二建设有限公司 | A kind of laboratory automatic fumigation system |
| CN112451709A (en) * | 2020-11-02 | 2021-03-09 | 宁波弗镁瑞环保科技有限公司 | SO (SO)2Epidemic prevention and killing method and device thereof |
-
2012
- 2012-09-04 CN CN 201220448892 patent/CN202751618U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103690979A (en) * | 2013-12-23 | 2014-04-02 | 北京克力爱尔生物实验室工程有限公司 | Formalin neutralization box |
| CN103690979B (en) * | 2013-12-23 | 2015-11-04 | 北京克力爱尔生物实验室工程有限公司 | In formalin and case |
| CN106267269A (en) * | 2016-09-14 | 2017-01-04 | 杨凌金海生物技术有限公司 | A kind of fumatorium structure |
| CN109125767A (en) * | 2018-09-17 | 2019-01-04 | 中国电子系统工程第二建设有限公司 | A kind of laboratory automatic fumigation system |
| CN112451709A (en) * | 2020-11-02 | 2021-03-09 | 宁波弗镁瑞环保科技有限公司 | SO (SO)2Epidemic prevention and killing method and device thereof |
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Granted publication date: 20130227 Termination date: 20160904 |