• 한국신뢰성학회:학술대회논문집
• /
• 한국신뢰성학회 2005년도 학술발표대회 논문집
• /
• pp.385-392
• /
• 2005

The restriction of the use of hazardous substances in electrical and electronic equipment legislation mandates the substitution of lead and other hazardous substances in electronics products by July 2006. Due to this legislative pressure, the electronics industry is moving to adoption of lead free solders. In this paper, we investigated a flux to restrict generating electrochemical migration in lead-free solder. The lead-free solders used in this study were Sn-0.7Cu-0.01P and Sn-3.0Ag-0.5Cu. To measure the resistance of electrochemical migration, the dew-cycle test and water drop test were adopted. As the result, now flux having high durable of electrochemical migration was developed.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 하계학술대회 논문집 B
• /
• pp.1037-1039
• /
• 2002

가전산업과 연계하여 유도가열 기술을 응용한 대표적인 시스템으로 IH압력밥솥을 예로 들 수 있다. 유도가열 코일에서 고주파 자속의 의해 발생된 와전류가 결합된 밥솥을 가열하기 때문에 유도가열 코일에는 고주파 손실을 줄이기 위해 Litz wire가 사용된다 이에 본 논문은 특히 IH압력밥솥에 사용되는 Litz wire를 선정하는 데 있어 중요한 요소가 되는 소선경, 가닥수별 AC DC 저항 및 손실계산 그리고 Cost 예측 방법을 제안한다.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2003년도 하계학술대회 논문집
• /
• pp.80-80
• /
• 2003

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2004년도 하계학술발표 논문집
• /
• pp.38-38
• /
• 2004

• 한국디자인학회:학술대회논문집
• /
• 한국디자인학회 2002년도 가을학술발표대회 디자인학 연구
• /
• pp.70-71
• /
• 2002

• 정보통신설비학회논문지
• /
• 제1권1호
• /
• pp.26-39
• /
• 2002

This paper describes design and implementation of home network control protocol for networked home appliances. The proposed network protocol has four-layered protocol structure and device-modem interface structure for the flexibility of modems based on power line communication. The standard message set is specified to guarantee the interoperability between various home appliances The proposed protocol can be easily implemented because it has minimum network overhead.

• 설비공학논문집
• /
• 제21권4호
• /
• pp.222-228
• /
• 2009

Various types of refrigerators become popular in the market such as a common refrigerator, kimchi refrigerator and wine cellar. It is required to develop a multi type refrigerator combining these refrigerators to save space and energy consumption. In this study, the performance of a multi type refrigerator, which consists of one machine room and three evaporators, was measured in a bench type multi refrigerator. The multi type refrigerator was tested by varying the number of refrigerator cabinet, refrigerant charge, and temperature conditions. In addition, the multi type refrigerator with a suction line heat exchanger(SLHX) was tested to improve system performance. Based on the experimental data, the multi type refrigerator showed better performance than the conventional refrigerator(single type system). Besides, the COP of the single system increased from 1.0 to 1.37, and those of the dual and triple system increased from 1.29 to 1.39, and 1.22 to 1.51, respectively, by applying the SLHX.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2006년도 하계학술발표대회 논문집
• /
• pp.1219-1224
• /
• 2006

This paper presents the friction and anti-wear characteristics of nano-oil with n mixture of a refrigerant oil and carbon nano-particles in the thrust slide-bearing of scroll compressors. Frictional loss in the thrust slide-bearing occupies a large part of total mechanical loss in scroll compressors. The characteristics of friction and anti-wear Lising nano-oil is evaluated using the thrust bearing tester for measuring friction surface temperature and the coefficient of friction at the thrust slide-bearing as a function of normal loads up to 4,000 N and orbiting speed up to 3,200 rpm. It is found that the coefficient of friction increases with decreasing orbiting speed and normal force. The friction coefficient of carbon nano-oil is 0.015, while that of pure oil is 0.023 under the conditions of refrigerant gas R-22 at the pressure of 5 bars. It is believed that carbon nano-particles can be coated on the friction surfaces and the interaction of nano-particles between surfaces can be improved the lubrication in the friction surfaces. Carbon nano-oilenhances the characteristics of the anti-wear and friction at the thrust slide-bearing of scroll compressors.

• 경영정보학연구
• /
• 제21권1호
• /
• pp.61-90
• /
• 2019

디지털 관점에서의 고객 여정과 고객 경험 관리는 기업의 중요한 현안으로 대두되고 있다. 대형 가전제품 시장도 최근 온라인 판매량이 크게 증가하면서 디지털 고객 경험의 중요성이 높아지고 있으나, 오프라인 중심의 기존 방식이 유지되면서 온라인에서 정보를 찾고 제품을 구매하는 고객의 경험은 차별화되지 못하고 있다. 이 연구는 고관여 제품인 대형 가전제품의 온라인 구매 고객을 중심으로 구매 여정 각 단계별 고객 경험의 특징과 상호 영향을 분석하고, 제품 재구매 의도에 미치는 영향을 알아보고자 하였다. 분석 결과, 정보검색 단계의 인지적, 정서적 경험 모두가 만족도에 직접 영향을 주고 있으나, 구매 단계에서 정서적 경험은 인지적 경험을 통해 간접적 영향을 주는 특징을 나타내었다. 정보검색 단계의 경험은 다음 단계인 구매 경험에 긍정적 영향을 미쳤으며, 구매 단계의 경험은 다시 제품의 재구매 의도로 연결되었다. 그러나 온라인 구매 채널별 소집단 분석을 통해 구매 채널의 선택에 따라서 구매 경험보다 정보검색 경험이 제품 재구매 의도에 영향을 주는 요인이 될 수 있음도 확인하였다.

• 설비공학논문집
• /
• 제17권1호
• /
• pp.56-61
• /
• 2005

Indoor air quality becomes of a concern recently in view of human health. This study investigates the air diffusion performance and the air change efficiency of a classroom, when outdoor air is introduced in addition to the heating/cooling operation of a ceiling-mounted heat pump. A CFD analysis has been performed to investigate the effect of the discharge angle of the air jets from the heat pump for both parallel and series types of outdoor air system. It is observed that the series type creates more uniform indoor environment compared to the parallel type in general. It can be concluded the discharge angle should not be larger than 40o for the parallel type, in order not to generate thermal stratification in the room.