• Title/Summary/Keyword: vacuum cleaner

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Flow Analysis of Vacuum Oral Cleaner Developed for Serious Patient (중증환자를 위한 진공 구강 세정기에 대한 유동해석)

  • Shin, Hyeon seok;Kim, Nam Woong;Kim, Kug Weon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.1
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    • pp.121-126
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    • 2018
  • The oral hygiene of patients admitted to the ICU (Intensive Care Unit) is very important. Critically ill patients are basically immunocompromised ones because of the high risk of infection by various pathogenic bacteria. The mouth is not only the primary site of infection, but also the site of systemic infections. The purpose of this study was to design a mouthpiece type vacuum oral cleaner for the oral care of seriously ill patients. A 3D CAD modeling and flow analysis model were established for a double structure type cleaner and standard tooth model, and their pressure and flow characteristics were analyzed. The pressure inside the oral cleaner was almost constant, but the velocity distribution showed a large difference between the inside and outside of the teeth. The velocity at the center region inside of the teeth was the highest, and the speed decreased as the distance from the center increased. In the analysis of the case where the suction tube was replaced by the drainage tube, the velocity at the center of the outer portion of the teeth was the highest. In order to increase the effectiveness of the oral cleaner, alternating between suction and drainage is proposed, and a design complement to increase the speed of the molar region is required.

Active silencer using switching method in vaccum cleaner (청소기 소음원에 적용한 스위칭 방식 능동 소음기)

  • 성덕만;이승요;한석우;최규하
    • Proceedings of the KIPE Conference
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    • 1997.07a
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    • pp.193-199
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    • 1997
  • Until now, environmental problem has become more and more serious, and acoustic noise is one of environmental pollutions. For many years, ANC(Active Noise Control) has been made to reduce this noise. In this paper, active silencer using switching method is studied. This silencer is composed of single-phase full bridge inverter to drive cancelling loudspeaker. The inverter is controlled to reduce noise by ramp comparison control method. At the vacuum cleaner, noise control with FFCS(Feed-Forward Control Structure) is applied and geometric arrangement is replaced to avoid unstability of FFCS.

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A Study on Improving Environmental Characteristics of Cyclone Vacuum Cleaner using Life Cycle Assessment (LCA 평가를 이용한 싸이클론 진공청소기의 친환경성 개선방안에 관한 연구)

  • Hwang, Bo-Seok;Yoon, Yong-Han;Lee, Chanhyun;Yi, Hwa-Cho
    • Clean Technology
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    • v.20 no.3
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    • pp.241-250
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    • 2014
  • In this study, performance and environmental characteristics of cyclone vacuum cleaners are analyzed and product improvement methods are investigated to minimize environmental effect of the cleaners using the result. A simplified LCA method is used to analyze environmental characteristics of the cyclone vacuum cleaners. Two cyclone vacuum cleaners with similar specifications are chosen for the experiment. Typical characteristics of cyclone vacuum cleaners such as energy consumption, suction force, noise and temperature are measured and compared. Most environmental effect was caused by the energy consumption in use phase of life cycle. Some ideas are created to reduce energy consumption of the vacuum cleaners in use phase like installing baffle, and methods to extend exchange period of filter. It is analyzed how recyclability rate of vacuum cleaners could be improved to reduce the environmental effect in whole life of the vacuum cleaners.

Numerical Analysis of Flow-Induced Noise and Fan Performance in Suction Nozzle of a Vacuum Cleaner with a Double-Blade Fan (이중 블레이드 팬이 장착된 진공청소기 흡입 노즐내 유로 유동 소음 및 팬 성능 해석)

  • Park, I-Sun;Sohn, Chae-Hoon;Lee, Sung-Cheol;Oh, Jang-Keun
    • Proceedings of the KSME Conference
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    • 2007.05b
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    • pp.2632-2637
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    • 2007
  • Rotary performance and flow resistance induced by each element in suction nozzle of a vacuum cleaner with a double-blade rotary fan are investigated numerically and its relation with flow-induced noise and rotary performance is examined. Flow resistance and vorticity in suction nozzle are calculated and it is found that they are closely related with flow-induced noise. Gap between double blades, adoption of cross-flow fan, enlargement of flow inlet area, and optimization of blade number are tested for noise reduction. Finally, the effects of each method are verified experimentally. It is found that several combinations of the proposed methods can be adopted for noise reduction although the degree of reduction is not much.

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Reduction of Flow-Induced Noise in Suction Nozzle of a Vacuum Cleaner by Adopting a Cross-Flow Fan (횡류팬을 적용한 진공청소기 흡입노즐내 유동 소음 저감에 관한 연구)

  • Park, I-Sun;Sohn, Chae-Hoon;Lee, Sung-Cheol;Oh, Jang-Keun
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2007.11a
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    • pp.935-938
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    • 2007
  • In suction nozzle of a vacuum cleaner, where flow-induced noise is generated mainly by flow resistance, several ideas to reduce noise are investigated. To increase fan performance, blade number is optimized and a centrifugal fan is replaced by a cross-flow fan, In addition, gear ratio of fan to drum brush is changed. It is found that fan performance is increased by adopting these methods. Next, the blade height of the fan is decreased to reduce sound pressure level, which causes inevitably decrease in fan performance. Eventually, flow-induced noise is reduced by 6.3 dBA in its overall level with the fan performance maintained.

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Numerical Analysis of Flow-Induced Noise in Suction Nozzle of a Vacuum Cleaner with a Rotary Fan (팬이 장착된 진공청소기 흡입 노즐내 유로 유동 소음해석)

  • Park, I-Sun;Lee, Sung-Cheol;Oh, Jang-Keun;Sohn, Chae-Hoon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.11a
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    • pp.208-211
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    • 2006
  • Flow resistance induced by each element in suction nozzle of a vacuum cleaner with a rotary fan is investigated numerically and its relation with flow-induced noise is examined. Flow resistance and vorticity in suction nozzle are calculated and it is found that they are closely related with flow-induced noise. From numerical results, it is suggested that reduction of flow resistance effectively increases all-suction performance and decreases sound pressure level of noise generated in the suction nozzle.

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Flow Analysis of a Turbo Fan for a Vacuum Cleaner (진공청소기용 터보팬 내부 유동 해석)

  • Lee, Ki-Choon;Hur, N.;Kim, Chang Jun;Jeon, Wan Ho
    • 유체기계공업학회:학술대회논문집
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    • 2001.11a
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    • pp.63-68
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    • 2001
  • A numerical analysis to predict the flow characteristics in turbo fan for vacuum cleaner has been performed by using CFD. The rotating reference frame method is applied to compute the impeller-diffuser interaction and the characteristics of two models, 460 and 380, are calculated for various rotating speeds and flow rates. The flow in impeller, diffuser and return channel is assumed as steady and compressible. STAR-CD with k- $\epsilon$ turbulence model is used to solve the Navier-Stokes equations. Computed relative velocity, absolute pressure and flow angles are shown and compared with measurement results. The good agreement between the predictions and measurement results confirms the validity of this study.

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Design Program of impellers of Vacuum Cleaner (진공청소기 임펠러 설계 프로그램)

  • Ahn, K.-W.;Lee, S.;Baek, S.-J.;Kim, C.-J.;Jeon, W.-H.
    • 유체기계공업학회:학술대회논문집
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    • 2001.11a
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    • pp.54-60
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    • 2001
  • In this research, we developed a computer code that designs a compressor impeller, which serves as an essential component of a vacuum cleaner, and predicted its performance. The TEIS model originally developed by Japikse(1985), and the mean line analysis m combined to design the centrifugal impeller optimally. In this program the inlet geometry is designed by using the mean line analysis, and with assumption of resonable exit blade angle, the optimal geometry is searched by means of TEIS model and iterative scheme. The performance of designed impeller was compared with experimental data, and the far-field noise by the rotating impeller is also predicted.

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Robot Vacuum Cleaner with Air Purification based on Arduino (아두이노를 이용한 공기청정 기능을 탑재한 로봇청소기)

  • Park, Myeong-Chul;Im, Hye-Jin;Shim, In-Bo
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2019.01a
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    • pp.233-234
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    • 2019
  • 전 세계적으로 미세먼지는 심각한 사회문제이다. 우리나라 또한 중국의 미세먼지와 디젤 자동차 급증 등에 의한 오염으로 인하여 호흡 시 들이마시는 공기의 질이 많이 나빠지고 있는 추세이다. 이로 인해 집 안의 환기를 위해 창문을 열거나 외출 후 귀가했을 때 옷에 붙은 미세먼지들에 의하여 집 안에 미세먼지가 쌓이게 됨으로써 건강을 위협할 수 있는 요소가 된다. 이러한 문제점들을 해결하고자 청소뿐만 아니라 공기청정 기능도 수행하게 되는 효율적인 측면을 가진 공기청정 기능을 탑재한 로봇청소기를 개발하였다. 따라서 본 논문에서는 로봇청소기의 초음파 센서와 미세먼지를 사용하여 자동으로 로봇청소기와 공기청정 기능을 탑재한 로봇청소기에 대한 연구 결과에 관해 기술하였다.

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