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A Question about a Rice Cooker :O)
Hi, thanks for looking at my post.
The Rice cooker in question is from China where they use 220 volt 50 hertz. I want to hook it up to 220 volt 60 hertz. In case you've never seen a rice cooker, it has a paddle switch that you press down to put it into "cooking mode" and then after a time the switch moves by itself to "keep warm" mode. This one also has a toggle switch for cooking "rice" or "soup." I'm pretty sure the heating element won't mind the different frequency but do you think the timer or whatever it is that moves the switch will be adversely affected? Thanks for your help, Richard |
#3
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"default" wrote in message
... On 30 Sep 2005 10:06:14 -0700, wrote: Hi, thanks for looking at my post. The Rice cooker in question is from China where they use 220 volt 50 hertz. I want to hook it up to 220 volt 60 hertz. In case you've never seen a rice cooker, it has a paddle switch that you press down to put it into "cooking mode" and then after a time the switch moves by itself to "keep warm" mode. This one also has a toggle switch for cooking "rice" or "soup." I'm pretty sure the heating element won't mind the different frequency but do you think the timer or whatever it is that moves the switch will be adversely affected? Thanks for your help, Richard It is unlikely you'll hurt it by running on a higher frequency. If it is a line referenced timer it would time out sooner, but it may have an independent time base or just sense moisture or temperature rise. Clock motors and transformers run cooler on 60 versus 50, and motors run faster. If it is necessary to put a fixed volume of rice and water in it, each time you use it, it is likely they do use some kind of timer. If you can vary the amount of rice, chances are it senses the rate of temperature rise, or temperature above boiling as the water is absorbed and vaporized. -- ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- I think most rice cookers work on the temperature rise principle using the water absorption cooking method. That's why you follow the instructions for x amount of water to y amount of rice. The proportion of rice to water sets the cook time. You can vary proportions to get undercooked or overcooked rice. They use a thin metal pot with not much thermal mass so that a temp sensing switch pressed against the bottom from outside detects the temp of the contents. While there's free water, the temp remains at or below 212deg due to that being the boiling point of water. Soon as the water is all absorbed, the temp of the metal rises, temp switch trips and reduces element power to "keep warm" mode. I used to wonder how they worked myself until I read about it on www.howstuffworks.com Then when I actually took a busted one apart I found it to be exactly as described. PH |
#4
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Thanks very much! The rice cooker is working fine with that "extra 10
hertz" doesn't seem to have affected the unit's operation at all. RivaRich |
#6
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A Question about a Rice Cooker :O)
On Fri, 30 Sep 2005 10:06:14 -0700, rivarich wrote:
Hi, thanks for looking at my post. The Rice cooker in question is from China where they use 220 volt 50 hertz. I want to hook it up to 220 volt 60 hertz. In case you've never seen a rice cooker, it has a paddle switch that you press down to put it into "cooking mode" and then after a time the switch moves by itself to "keep warm" mode. This one also has a toggle switch for cooking "rice" or "soup." I'm pretty sure the heating element won't mind the different frequency but do you think the timer or whatever it is that moves the switch will be adversely affected? Thanks for your help, Richard The rice cookers I've heard of don't use a timer - they use a thermostat. While the water is simmering, it won't go above 212F (100C). As soon as the water boils dry, the temp. of the chamber starts to climb, and that trips it off. For soup, they probably just have a different set point - I had a little two-cup instant boiler for coffee water that as soon as the water reached boiling, it would click off. I'd say, go ahead and do it - a couple of cups of rice is almost free, and you won't hurt the cooker. Cheers! Rich |
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