tnhrbtnhb
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How much an air conditioner can pump as a vacuum pump
http://www.belljar.net/refrig.htm
sorry everyone, I figure I should have realized I will get about 1 cfm (I have a small compressor) so I shouldn't have really asked..... But this
could still be a thread about using air conditioner compressors as vacuum pumps.
[Edited on 16-2-2007 by tnhrbtnhb]
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BromicAcid
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I have never had a problem using an air conditioner compressor as a vacuum pump. And they all work very well and best of all you can just use them
till they destroy themselves. Beware that pulling ammonia through them will easily eat the coils 
http://www.destructve.com/bromicacid/carbonate.htm
The link that is above goes to a page where I have my apparatus set up for the preparation of ethylene carbonate. The vacuum is used to pull ammonia
off as it is formed. I ran this into a wash bottle full of 30% H<sub>2</sub>SO<sub>4</sub> but as the reaction progressed the
ammonia gas being pulled through the pump started to dissolve it leading to the blue color seen in the wash bottle in the picture.
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tnhrbtnhb
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| Quote: | Originally posted by BromicAcid
I have never had a problem using an air conditioner compressor as a vacuum pump. And they all work very well and best of all you can just use them
till they destroy themselves. Beware that pulling ammonia through them will easily eat the coils
http://www.destructve.com/bromicacid/carbonate.htm
The link that is above goes to a page where I have my apparatus set up for the preparation of ethylene carbonate. The vacuum is used to pull ammonia
off as it is formed. I ran this into a wash bottle full of 30% H<sub>2</sub>SO<sub>4</sub> but as the reaction progressed the
ammonia gas being pulled through the pump started to dissolve it leading to the blue color seen in the wash bottle in the picture.
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Thanks, that looks like an interesting site....
What coils are you reffering to, or was that supposed to be "oil"?
Did you remove the starting capacitor? That's what the bell-jar page says to do, but it sounds like a funny thing..... I mean, as far as the
compressor is concerned, it's still in the air conditioner, except with regards to cooling, no? according to the capacitor article on wikipedia
"In an inverse fashion, to initiate current quickly through an inductive circuit requires a greater voltage than required to maintain it; in uses such
as large motors, this can cause undesirable startup characteristics, and a motor starting capacitor is used to increase the coil current to help start
the motor."
so it is some sort of load-leveling thing, maybe the compressor will work without it, but it's better to leave it in?
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BromicAcid
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By coils, I meant the pipes on the inside of the compressor itself, at least some of it is made of copper and that is what was being eroded by the
ammonia. I didn't remove the capacitor, I just took the whole compressor out of an air conditioner as it was and didn't tinker with the electrical at
all, it ran fine, I just kept the part that read the temperature on the cooling coil off to the side so it never turned off from thinking it was cool.
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