• Title/Summary/Keyword: vacuum cleaner

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A Dust Detection Sensor System for Improvement of a Robot Vacuum Cleaner (청소 로봇 성능 향상을 위한 먼지 검출 시스템)

  • Kim, Dong-Hoe;Min, Byung-Cheol;Kim, Donghan
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.10
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    • pp.896-900
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    • 2013
  • In this paper, we develop a dust detection sensor system capable of identifying types of dust for an improvement of a robot vacuum cleaner. The dust detection sensor system is composed of a set of infra-red sensors: a single transmitter and multiple receivers. Given the fixed amount of light transmitted from the transmitter, the amount of light coming in multiple receiver sensors varies, depending on the type and density of dust that is passing between the transmitter and the receivers. Therefore, the type of dust can be identified by means of observing the change of the amount of light from the receiver sensors. For experiments, we use two types of dust, rice and sesame, and validate the effectiveness of the proposed method.

Thermal Analysis of Vacuum Cleaner Suction Nozzle Cover under Variable Conditions (다양한 조건하에서의 진공청소기 흡입구 커버의 열변형 해석)

  • Kang, Hyung-Seon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.5
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    • pp.973-978
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    • 2007
  • In this paper, we make a study of a thermal deformation by FEM and test to define the deformation mode of the Vacuum-Cleaner's Nozzle-Cover. In FEM analysis, 3 different conditions were considered separately, such as (1) Compressive force by Belt tension, (2) Friction heat between Belt and Shaft and (3) Compressive force combined with heat. Throughout FEM analysis it was found that the deformation was caused by heat and it was proved through a simulation test with a real product.

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Noise Reduction Method and Sources of Cyclone for Vacuum Cleaner (청소기용 Cyclone 소음원 및 저감방법)

  • Lee, Jun-Hwa;Hong, Seung-Gee;Joo, Jae-Man;Oh, Sang-Kyong;Song, Hwa-Gyu;Oh, Jang-Keun
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.11a
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    • pp.89-92
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    • 2004
  • Cyclone is widely apoted in the vacuum cleaner, because of it's simple structure, the dust collection efficiency is high and its transparency feaure which can be shown to the customer. At past times, cyclone performance is represented by collection efficiency, flow rate, pressure drop etc. At recent times the noise problem is getting important as cyclone comes into home-appliances. In this paper, cyclone's pressure drop and noise is measured at the variation of the cyclone structure and the main sources of cyclone peak noise is found by experiments and numerical analysis. In addition, the structure for peak noise reduction is suggested and it is beneficial both pressure drop and noise reduction.

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Development of a Comprehensive Usability Testing and Analysis Framework for the Physical Interface Between Product and User

  • Lee, Won-Sup;Jung, Ki-Hyo;Lee, Hyun-Ju;Song, Hwag-Yu;Oh, Jang-Keun;You, Hee-Cheon
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.2
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    • pp.331-338
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    • 2011
  • Objective: The present study developed a comprehensive usability testing and analysis framework based on a physical interface model of product and user and applied the proposed framework to usability testing of canister-type vacuum cleaner. Background: The development of a user-centered product design is important to satisfy customers who want to use the product with ease of use and to keep the manufacturer competitive in the market. Method: The proposed testing and analysis framework consists of (1) characterization of physical product-user interface, (2) preparation and administration of usability testing questionnaire, and (3) analysis and interpretation of usability testing results. A usability evaluation of five vacuum cleaners was planned and administered based on the proposed framework and its analysis produced detailed and overall usability testing results for various aspects such as tasks, usability criteria, and design components. Results: The testing results were further utilized to identify usability problems and preferred design features of the vacuum cleaners. Conclusion: The proposed usability testing and analysis framework was found effective to identify preferred features and problems of a product design in a systematic, holistic manner. Application: The proposed framework can be of effective use for practitioners of product design and development to obtain comprehensive, quantitative usability testing information in a systematic manner.

Analysis of Objective Sound Quality Features for Vacuum Cleaner Noise (청소기 소음 측정을 위한 객관적 음질 특성 분석)

  • Lee, Sang-Wook;Cho, Youn;Park, Jong-Geun;Hwang, Dae-Sun;Song, Chi-Mun;Lee, Chul-Hee
    • The Journal of the Acoustical Society of Korea
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    • v.29 no.4
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    • pp.258-264
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    • 2010
  • In this paper, we propose an objective quality feature which is based on the human auditory system to measure vacuum cleaner noise. It is observed that some frequency bands are more sensitive to the human auditory system. Therefore, we divided the audible frequency range of vacuum cleaner noise into a number of frequency bands and the average energy of these bands was calculated. Among a number of average energies, an average energy of a frequency band was selected as the proposed feature. In order to test the performance of the proposed feature, fourteen vacuum cleaners were chosen and the noise was recorded in an anechoic-chamber. Then we performed subjective tests to obtain subjective scores of the noise data using the PCM (paired comparison method) and ACR (absolute category rating) subjective methods. The proposed objective quality feature shows high correlation with the subjective scores.

Development of a Potable Skimmer with a Vacuum Cleaner (진공청소기를 이용한 휴대용 유출기름 회수기의 개발)

  • 박외철
    • Journal of the Korean Society of Safety
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    • v.10 no.1
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    • pp.41-49
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    • 1995
  • A potable oil skimmer is in need to remove spilt oils before they spread, which is applicable to various situations of oil viscosity, spill location, current, tides, waves and wind. An air suction skimmer was selected to be developed because of its advantages such as simple structure, excellent transportability, and easy deployment. A prototype operating by a commercial vacuum cleaner was fabricated. Tests of the skimmer showed good performance : the maximum suction rate of water and suction head were 18㎥/h and 2.7m, respectively.

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The Design of Phase Angle Controller Reducing Sub-harmonic Current for Universal Motor in Vacuum Cleaner (진공청소기용 유니버셜모터의 고조파전류 저감 위상각제어기 설계)

  • 임홍우;장용해;백형래
    • The Transactions of the Korean Institute of Power Electronics
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    • v.7 no.3
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    • pp.237-243
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    • 2002
  • The single phase angle control system may become noisy when speed Is modulated with a conventional TRIAC AC controller. But this system is widely used despise of occurring sub-harmonic current because of its simply structure and low cost. Most of the vacuum cleaner drive control system regulates TRIAC's phase angle, so that it is controlled the speed. In the case of marketing product, it is not considered linearity of the speed to minimize occurring harmonic current. The sub-harmonic current reduces effectively in regulating specification TRIAC trigger phase angle. In this paper, we examined about characteristics of phase angle controller and parameter of parallel coil for eliminating sub-harmonic current.

An Analysis of the Unsteady Flow-Field and Aerodynamic Sound of a Turbo Fan used in a Vacuum Cleaner (청소기용 터보홴의 비정상 유동장 및 공력소음 해석)

  • Jeon, Wan-Ho;Kim, Chang-Joon;Rew, Ho-Seon
    • The KSFM Journal of Fluid Machinery
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    • v.5 no.2 s.15
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    • pp.36-42
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    • 2002
  • A new method to calculate the aeroacoustic pressure of a centrifugal fan that is used in a vacuum cleaner has been developed. The centrifugal fan consists of the impeller, the diffuser, and the circular casing. Due to the high rotating speed of the impeller and the small gap distance between the impeller and diffuser, the centrifugal fan makes very high noise levels at BPF and its harmonic frequencies. In order to calculate the sound pressure of a centrifugal fan, the unsteady flow field data is needed. This unsteady flow field is calculated by the vortex method. The sound pressure is then calculated by acoustic analogy. In this paper, only dipole term is considered in the equation. The noise generated by moving impeller and stationary diffuser is calculated separately. The predicted acoustic pressures agree very well with the measured data. The difference between the two is less than 4dB

A Review on the Performance Criteria of Equipment Required for Asbestos Removal (석면 해체.제거 작업에서 사용되는 장비의 성능 기준에 관한 고찰)

  • Lee, Naroo
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.23 no.3
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    • pp.212-221
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    • 2013
  • Objectives: Asbestos fibers are accumulated in negative pressure unit (NPU) or vacuum cleaner in asbestos removal. Failure of operation or poor use performance of the NPU or vacuum cleaner causes asbestos fibers to spread in the air. Asbestos contractors should have an NPU fitted with a HEPA , vacuum cleaner, decontamination area, respirators, wetting equipment, and differential pressure manometer to register with the Ministry of Employment and Labor. There should be performance criteria of equipment used in asbestos removal. But there are none such criteria used in asbestos removal. This study was performed to investigate international or national performance criteria of equipment used in asbestos removal. Methods: Regulations, approved code of practice, guidance and national standards of the UK, USA and Korea were reviewed. A survey was done to investigate the requirements for equipment used in asbestos removal in Korea. Results: Air flow of NPUs used in Korea usually covers from$500m^3/h$ to over $3000m^3/h$. Some requirements for NPUs used in Korea were missing compared to the requirements of British standards for NPUs. All NPUs have different missing requirements. The UK also has separate British standard for leak tests for NPUs. Highly hazardous class vacuum cleaners should be used in asbestos removal in the UK. It has national standards on the operation of vacuum cleaners used in asbestos removal. There is only a certification system for less than 2.5kw rated voltage vacuum cleaners for home use in Korea. Powered (-assisted) respirators with mask are recommended in asbestos removal. Type 5 coveralls should be used in asbestos removal in the UK. There are international standards for requirements and leak tests of type 5 coveralls. A manometer for measuring differential pressure is needed in asbestos removal. The manometer's measuring range should cover less than ${\pm}125$ Pa and the gradation of manometer should be less than 2.5 Pa. The definition of decontamination area should be corrected. Installation of airlock and minimum area should be considered in decontamination area. Conclusions: Equipment should be used in asbestos removal proper performance and no leaks. There should be a certification system for equipment used in asbestos removal. This study can help to a certification system for equipment used in asbestos removal in Korea.