塞風 拉壺連續失敗 - 咖啡討論
By Damian
at 2014-04-08T16:31
at 2014-04-08T16:31
Table of Contents
跟所有的鄉民一樣,我也對"拉壺"這個專有名詞(or動詞?)感到十分陌生...
看了原Po的描述後,大概知道所謂"拉壺"是啥意思 ;and也知道您遇上了何種問題~
賽風壺(或說虹吸壺)的特色是利用密閉的下壺空間,以水蒸氣的產生與消失(凝結),
來達成將煮咖啡的水推到上壺與吸回下壺(嚴格說,應該是大氣壓將水推回下壺)...
會造成上壺咖啡(水)無法迅速回去下壺的原因主要是--下壺"真空度"不足...
(阻力過大也是一個可能,但一般的情況下較少遇到~)
可能是當初插上上壺時機過早(下壺空間尚殘留有不少空氣,即插上上壺) ;
也可能是氣密不佳(好比橡皮老化無法緊密/力道不足太鬆),導致空氣跑進去下壺...
從原Po的文章看來,應該是沒有滿壺,同時在下壺水仍頗冷的情況就插上上壺,於是
在下壺的密閉空間殘留了不少空氣,使應該呈真空的完成階段"吸力不足"...
--
看了原Po的描述後,大概知道所謂"拉壺"是啥意思 ;and也知道您遇上了何種問題~
賽風壺(或說虹吸壺)的特色是利用密閉的下壺空間,以水蒸氣的產生與消失(凝結),
來達成將煮咖啡的水推到上壺與吸回下壺(嚴格說,應該是大氣壓將水推回下壺)...
會造成上壺咖啡(水)無法迅速回去下壺的原因主要是--下壺"真空度"不足...
(阻力過大也是一個可能,但一般的情況下較少遇到~)
可能是當初插上上壺時機過早(下壺空間尚殘留有不少空氣,即插上上壺) ;
也可能是氣密不佳(好比橡皮老化無法緊密/力道不足太鬆),導致空氣跑進去下壺...
從原Po的文章看來,應該是沒有滿壺,同時在下壺水仍頗冷的情況就插上上壺,於是
在下壺的密閉空間殘留了不少空氣,使應該呈真空的完成階段"吸力不足"...
--
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咖啡
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