The inventor of the automatic rice cooker

Rice cooker mechanisms & physics

• Several comments expand on how modern rice cookers work beyond the article:
  • Many use a Curie-point alloy and magnet: the pot sits on a metal puck that loses magnetism just above 100 °C, releasing a spring and switching from “cook” to “keep warm.”
  • Others (and the original design described in the article) use bimetallic switches and “bang‑bang” control based on the latent heat of water: temperature only rises above boiling once liquid water is gone.
  • Indirect-heating “double-boiler” style cookers (common in Taiwan) boil away water in an outer reservoir; most current consumer models don’t use this approach.
• Comparisons are drawn to thermostats, electric kettles, dryers, and old turn signals using similar bimetallic or thermal tricks.

Instant Pots, pressure cookers, and rice cookers

• Some argue an electric pressure cooker (e.g., Instant Pot) makes rice as well or better, faster, and replaces a single‑purpose device.
• Others strongly prefer dedicated rice cookers:
  • Simpler, lighter, one‑button operation, easy cleaning.
  • Better texture, consistency, and long “keep warm” capability; can be used multiple times a day.
  • High‑end “fuzzy logic” / pressure rice cookers in Asia are praised for quality, though some see “fuzzy” as partly a marketing buzzword for standard control algorithms.
• Practical constraints noted:
  • Instant Pots need heat‑up/pressure/release time and can’t cook by “water fully absorbed” directly.
  • If the pressure cooker is busy with other dishes, a separate rice cooker is still useful.

Cooking methods and convenience

• Many share alternative methods: simple stovetop techniques, heavy claypots, microwaving, “pasta‑style” boiling with excess water, and “pot‑in‑pot” pressure cooking.
• The main value of rice cookers is framed as “asynchronous cooking”: set‑and‑forget, reliable results, and warm rice available all day, especially in households eating rice with most meals.

Health concerns: arsenic and rice

• Some references warn about arsenic in rice and recommend soaking and/or boiling in excess water then discarding it.
• Others consider this overblown or impractical, noting:
  • Arsenic levels vary by source and are also present in brown rice bran and soils generally.
  • Billions eat rice daily and countries with rice‑heavy diets often have high life expectancy.
• Consensus: thorough rinsing and, optionally, cooking in surplus water reduces exposure; evidence and recommendations are mixed.

Critiques of the article and broader context

• Multiple comments say the article glosses over modern designs and contains factual inaccuracies (e.g., about Chinese cooker styles).
• There is discussion that contributions of housewives and domestic inventors are often under‑credited, but some push back that examples do exist, and the phrase “not often” is hard to quantify.