• 제목/요약/키워드: Air Sterilizer

검색결과 24건 처리시간 0.019초

공기정화 살균기 개발 및 성능검증 연구 (A Study on Development and Performance Test of an Air Purify-sterilizer)

  • 정재윤;장조원
    • 한국항공운항학회지
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    • 제14권3호
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    • pp.51-59
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    • 2006
  • The air purity-sterilizer was developed and the CFD and experimental studies were carried out in order to investigate the performance of a air purity-sterilizer. Overhaul and exchange efficiency were increased by the modularization of the air purity-sterilizer. The good performance was validated by the hot-wire measurements and flow simulations in the room. Mean velocities at the exit of the air purity-sterilizer were 0.91, 1.62, 1.99, and 6.14 m/sec according to the fan mode. And the flow visualization of pured air was shown by using CFD flow simulation in the room of 24, 50 pyeong. The results show that the air purity-sterilizer has a high performance enough to produce air purity-sterilizer on a commercial scale.

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미생물 안전을 위한 승용차 실내 UVGI 살균기 설치에 관한 시뮬레이션 연구 (A Study on simulation analysis of UVGI air sterilizer installation in a car for microbiological safety)

  • 최상곤
    • 대한안전경영과학회지
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    • 제16권3호
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    • pp.279-287
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    • 2014
  • The recent rise in SARS and bird flu infections around the world has raised the interest in studying the habits of air borne pathogens such as germs and viruses. In this study, simulations were carried out to predict the performance of UVGI air sterilizer at preventing airborne infections inside a car, based on the installation position and the removing effect of the UVGI air sterilizer. Simulation results showed that the UVGI air sterilizer was most effective when located at the rear side of the front seats. It was also showed that when the out-air mode and the UVGI air sterilizer were set to the highest capacity, the microbial safety levels were maintained in a car for 21 hours.

공기감염 전파방지를 위한 UVC 공기살균기 성능평가에 관한 연구 (The Study on the Performance Estimation of UVC Air Sterilizer for Preventing Transmission of Air Borne Contagion)

  • 최상곤;홍진관
    • 설비공학논문집
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    • 제17권6호
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    • pp.581-586
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    • 2005
  • Recently, the use of UVGI system has been increasing in both medical and nonmedical buildings for the control of environmental microorganisms. In the present study, irradiance performance test of UVC lamp was carried out and indoor air sterilization effect of UV ray for preventing transimission of air borne contagion was investigated by using manufactured UVC air sterilizer. Experimental results show that the effective irradiance of UVC lamp is strongly dependent on air velocity and temperature in irradiance performance test. An individual microbiological killing effectiveness experiment also shows that the average kill rate of two microbiological samples such as bacteria and fungus is about $92\%$ by using manufactured UVC air sterilizer. Additionally irradiance performance experimental results also show that the ballast is very important factor to keep up irradiance performance of UVC lamp.

병원내 공기오염과 물품의 항균에 대한 상태조사 (A Study on the Degree of Contamination of Air and Materials in a Hospital)

  • 차옥주
    • 한국환경보건학회지
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    • 제8권1호
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    • pp.25-30
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    • 1982
  • The incidence of hospital infection has been seriously increased in the general hospital in recent years. This study was performed on hospital air and materials in a General Hospital in Seoul from June to December in 1980. The results were as follows: 1. Air sampling was done in multiple strategic areas by exposing standard petridishes for 5 minutes. There was a significant difference of airborne microbe between places. ($F._{99}$ = 3.2, p < 0.01). 2. The mean colony count was 8.6$\pm$6.2 colonies / plate / 5 minutes. 3. Gram stains of colony in air sampling were Gram (+) cocci 66.5%. Gram (+) rod 18.4%, Gram (-) cocci 1.3%, Gram (-) rod 8.7% Fungus 4.5%. 4. For the evaluation of sterilization of steam sterilizer and ethylene oxide gas sterilizer, biological monitoring were done by commercial spore strip. Positive culture was obtained in 2 out of 41 tests on 3 steam sterilizers, and in 3 out of 13 tests on ethylene oxide gas sterilizer. 5. Product sampling and culture were done for 2 kinds of disinfectants and 30 sets of various operation package or dressing materials. Positive culture was obtained in one disinfectants.

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초등학교내 공기중 부유세균 및 바이러스 사멸방법에 대한 연구 (A Study on How to Kill Airborne Bacteria and Viruses in Elementary Schools)

  • 이수연;김창수;곽은미;임종언;전재환;권준호
    • 한국재난정보학회 논문집
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    • 제18권3호
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    • pp.566-573
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    • 2022
  • 연구목적: 본 연구는 중동호흡기증후군(MERS) 및 코로나바이러스 감염증-19(코로나19)의 국내 유행 이후 늘어난 신종 감염병에 대한 두려움을 해소하기 위하여, 감염취약계층의 집단감염 위험이 있는 초등학교에서 공기살균기 적용에 따른 공기살균효과를 검증하고자 하였다. 연구방법: 서울시 소재의 초등학교의 교실 및 급식실, 화장실에 공기살균기를 각 1대씩 설치하고 공기살균기와 2m 떨어진 거리에서 표면 및 공기 시료를 채취하여 미설치 대조군과 비교하여 세균저감 효과를 분석하였다. 연구결과: 표면에서의 살균효과는 대조군 및 시험군 모두 2log CFU/cm2미만의 결과가 나왔으며, 대조군에 비해 시험군이 54~87% 저감효과가 있는 것으로 나타났다. 또한 공기중에서의 살균효과는 공기살균기 설치 위치에 따라 살균능력이 차이 났으며, 벽면 설치는 대조군에 비해 최대 91%의 저감 효과를 보였으며, 중앙 설치는 최대 93%의 저감 효과를 보였다. 결론: 연구결과 상시적인 소독을 진행하는 초등학교에서 현재의 방역프로그램을 유지하는 한편 공기살균기의 적용하여 상시적인 공기살균을 병행하면 감염병 전파 방지에 상승효과를 볼 수 있을 것으로 보인다. 또한 공기살균기로의 공기유입이 원활할 수 있도록 하는 것이 바람직할 것으로 사료된다.

개별공간의 자외선 살균 시스템 (UV Immune System of Personalized Space)

  • 정기범;최상곤
    • 설비공학논문집
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    • 제21권1호
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    • pp.63-70
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    • 2009
  • The air sterilization systems are investigated experimentally in this paper. The goal is to reduce bacteria, mold and viruses in office air by using a UV sterilizer installed inside a partition panel and wall-mounted unit. These systems allow occupants to turn the system on/off and to control the incoming air speed and direction. The partition air sterilization system conditions and sterilizes the air, and then delivers the clean air into the personal task area through the partition panels, which are connected to the pressurized under-floor plenum. Room air exits through the return grills mounted on the ceiling. The wall-mounted air sterilization system sterilizes the air, and then delivers the clean air to the personal task area from the wall. In this study a full-size experimental environment is established to investigate the immunization performance of these air sterilization systems. A typical office space scale is used in this study in order to find an optimal system to achieve a sterilized healthy micro-environment. Multiple system parameters, including volume flow rate and velocity of supplied air, were regulated during the experiments. The more air contact these air sterilization systems had, the better disinfection performance. Over 90% of eradication ratios were obtained by these two air sterilization systems. The results indicate that these systems can efficiently disinfect office air contamination.

건물 재실자의 미생물 안전을 위한 면역건물 기술의 에너지 사용 연구 (A study on the disinfection performance of indoor microorganism using energy consumption analysis for indoor bio-safety)

  • 최상곤
    • 대한안전경영과학회지
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    • 제11권4호
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    • pp.111-118
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    • 2009
  • In this study the real situation of apartment house in seoul is reproduced with multi-zone modeling program CONTAM2.4. This model include disinfection system which is consist of dilution, filtration, UVGI(ultra violet germicidal irradiation). It's energy consumption was also analyzed through the linked model of CONTAM and TRNSYS according to the combination of components. The comparison of total energy consumption through energy analysis revealed that adjusting the air change rate of the UVGI air sterilizer to maintain the same indoor microbe removal capability was more advantageous in terms of energy consumption.

Sterilization effect of atmospheric pressure non-thermal air plasma on dental instruments

  • Sung, Su-Jin;Huh, Jung-Bo;Yun, Mi-Jung;Chang, Brian Myung W.;Jeong, Chang-Mo;Jeon, Young-Chan
    • The Journal of Advanced Prosthodontics
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    • 제5권1호
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    • pp.2-8
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    • 2013
  • PURPOSE. Autoclaves and UV sterilizers have been commonly used to prevent cross-infections between dental patients and dental instruments or materials contaminated by saliva and blood. To develop a dental sterilizer which can sterilize most materials, such as metals, rubbers, and plastics, the sterilization effect of an atmospheric pressure non-thermal air plasma device was evaluated. MATERIALS AND METHODS. After inoculating E. coli and B. subtilis the diamond burs and polyvinyl siloxane materials were sterilized by exposing them to the plasma for different lengths of time (30, 60, 90, 120, 180 and, 240 seconds). The diamond burs and polyvinyl siloxane materials were immersed in PBS solutions, cultured on agar plates and quantified by counting the colony forming units. The data were analyzed using one-way ANOVA and significance was assessed by the LSD post hoc test (${\alpha}$=0.05). RESULTS. The device was effective in killing E. coli contained in the plasma device compared with the UV sterilizer. The atmospheric pressure non-thermal air plasma device contributed greatly to the sterilization of diamond burs and polyvinyl siloxane materials inoculated with E. coli and B. subtilis. Diamond burs and polyvinyl siloxane materials inoculated with E. coli was effective after 60 and 90 seconds. The diamond burs and polyvinyl siloxane materials inoculated with B. subtilis was effective after 120 and 180 seconds. CONCLUSION. The atmospheric pressure non-thermal air plasma device was effective in killing both E. coli and B. subtilis, and was more effective in killing E. coli than the UV sterilizer.

공기 조화를 위한 자외선 C 살균기의 개발 및 평가 (Development and Evaluation of Ultraviolet C Sterilizer for Air Conditioning)

  • 윤중현;선기주;천민우
    • 한국전기전자재료학회논문지
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    • 제24권12호
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    • pp.1018-1022
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    • 2011
  • Nowadays, with improvement of economical income and life qualities, life pattern changes have been brought such as increasing of avocational activities. Consequently, following those life trends, utilization of car is getting increased. Thus, the perceptions of car have been changed from the only means of transport in the past to a 2nd residental space. that is why the car's endo environmental factors are getting so important. Air conditioner regulating air ventilization in vehicle's indoor automatically sets the right temperature based on the differences of indoor and outdoor's temperature with development of advanced functions to provide better environmental qualities in vehicle. However, even those advanced techniques for functional development are got so diverse though, the essential technique for preventing the growth of bateria and mold inside of the air conditioner are not even severals. Especially, evaporator one of the vehicle air conditioning equipments generates cooled air by vaporizing refrigerant in liquid state with the water as the adduct for this reactions. It has structural difficulties for water vaporation then cause the growth of germs. That's why this reseach was focused on the way of eliminating germs in the vehicle air conditioner efficiently. Direct air sterilizer by using UVC(Ultraviolet C) is manufactured and that performances are evaluated.