彈簧拉霸機增加萃取壓力如何計算? - 咖啡討論
By Ingrid
at 2015-03-09T23:31
at 2015-03-09T23:31
Table of Contents
小弟日前在ebay標到一台二手mini gaggia
因為看到這篇文章
http://tinyurl.com/muee4q8
提到mini gaggia的彈簧不太夠力
因此想先訂做一根彈簧增加一些力道
但對於如何計算彈簧的係數有些疑問
根據 http://tinyurl.com/q5k4uhg
1 bar ~= 0.0102 kgf/mm^2
以58mm的濾杯來看 29*29*pi ~= 2642 mm^2
因此若要增加 1 bar的壓力約需要 2642 * 0.0102 = 26.9484 kgf
活塞行程約兩公分 借此估算?彈簧規格
問題來了~
58mm濾杯底圓面積其實直徑只有50mm
而濾杯底有孔洞分佈的面積直徑更只有45mm
應該以哪個做為計算基準呢?
亦或是應該估算濾杯底部每個小孔之面積總和才是真正的面積?
實際上大概加根彈簧稍為增加一下壓力就好...畢竟好喝才是重點
只是單純想了解一下
請版上先進不吝指教~
--
有人對接粉器有興趣嗎
手邊有一個不鏽鋼的但太重了 想拋了..
倒是有想過用3D列印來印接粉器 夠輕 尺寸多變好設計
就不知道這樣輕微接觸需要考慮材料之毒性嗎?
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