Quantitative Troubleshooting of Window-type Air- Conditioner

• Main Authors: CHANG,WEI-CHIH, 張惟志
• Other Authors: LEE,JING-NANG
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/74231343343533753722

碩士 === 國立勤益科技大學 === 冷凍空調系 === 102 === In this study, a window-type air-conditioner experimental platform is proposed to analyses system malfunction. The common issues, such as incorrect amount of refrigerant, heat exchanging efficiency in evaporator, cooling efficiency of condenser and lacking of air-flow exchange, are collected for establishing the criteria of system malfunction. The results show that the expansion valve outlet (T6), the evaporator inlet (T7), the evaporator outlet (T8) and the compressor inlet (T1) of the temperature change, when only the temperature T6 and T7 decrease the refrigerant can be determined in the case of insufficient operation , if the temperature drops to below -1 ℃, at this time the amount of refrigerant remaining 40% or less; T8 and T1, when coupled with decrease simultaneously, it is judged as a poor heat exchange efficiency of the evaporator, the heat exchange efficiency of the evaporator case temperature change amount from the low pressure side of 20% to 140% of the current seen in the evaporator heat exchange efficiency; addition, poor heat dissipation and a condenser, excessive refrigerant state was observed by a compressor outlet (P2), a condenser inlet (P3), the condensed outlet (P4) and an expansion valve inlet (P5) that, if the P2, P3, P4 and P5 the pressure rises to a phenomenon that the amount of excessive refrigerant; T4 and T5, when coupled with the temperature rises, i.e., poor condenser cooling efficiency can be judged, the amount by which the efficiency of temperature change that. Finally, the air flow when the short cycle of the air conditioner, temperature, pressure, current, and power consumption have decreased the trend.