日本冷凍空調学会論文集
Online ISSN : 2185-789X
Print ISSN : 1344-4905
ISSN-L : 1344-4905
論文
膨張弁を通過した冷媒の気液二相流動現象の可視化
藤井 康彦木村 繁男齋藤 隆之木綿 隆弘松村 和彦
著者情報
ジャーナル フリー

2006 年 23 巻 1 号 p. 67-78

詳細
抄録

Recently, the noise caused by the refrigerant fluid is spotlighted due to the demand of low noise home and office air conditioners. Especially, reduction of refrigerant fluid noise and vibration noise generated from throttle in the expansion valve is becoming important. Therefore in this study it is intended to resolve fluctuating phenomena of fluid, which may be the cause of noise, by flow visualization and measurement of fluid pressure and temperature at throttle valves, focusing on two-phase flow of refrigerant fluid. A test equipment suitable for flow visualization of R410a refrigerant was developed by epoch making design and manufacturing method. Visualization was realized by laser beam irradiated on the visualization equipment and by high-speed video camera. Test conditions are set of combinations of 4 different conditions of compressor revolution and 4 different conditions of valve opening of expansion valve. As results of the following conclusions are drawn. (1)A visualization technique of throttle of expansion valve has been developed by manufacturing visualization equipment, which is most suitable to the test. (2)It has been confirmed that refrigerants is liquid and two-phase condition in the upstream of throttle, where a needle is inserted and that refrigerant fluid flow in two-phase in the downstream of throttle.

著者関連情報
© 2006 公益社団法人 日本冷凍空調学会
前の記事 次の記事
feedback
Top