Appliances and furniture
Drum washing machine structure — switching between under 1G and 335G
The same drum has to stay under 1G to wash and reach 335G to spin, which is why it hangs on springs behind a concrete weight rather than being bolted to the machine
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
同じドラムで、1G 未満と 335G を切り替えている。
洗いは 1G を超えてはいけない。 超えると衣類が壁に貼りつき、落ちて叩きつける動き(たたき洗い)が消える。ドラム径 600mm なら 55rpm が境。脱水の 1,000rpm は 335G —— 水が布から 335 倍の重さで引き剥がされる。
だから1kg の偏りが、335kgf の回る力になる。ドラムは機械に固定できない —— ばねで吊り、ダンパで受け、おもりで重くする。ドラム式が重いのはこのため(洗濯乾燥機の平均は 77.7kg / 縦型 50.2kg)。重さの平均の出典(2026-10-02 確認):@DIME「主要メーカー4社の46モデルを徹底検証!」2021-08-01(国内主要 4 社の洗濯乾燥機 46 機種のカタログ値の集計) https://dime.jp/genre/1188298/遠心力は a = r(2πn/60)²。r = 0.3m で 55rpm → 1.01G、1,000rpm → 335G。
脱水前にいつまでも回っているのは、偏りを測り直している。収まらないときに「偏り」と出して止まる。
ヒートポンプ乾燥は、空気を外へ出さない。冷やして水を落とし、温め直して回す。外へ捨てるのは水だけ。
Source (YAML)
examples/gallery/250-ドラム式洗濯機の構造.zumen.yaml
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