Summer time troubles
Posted: Wed Jul 06, 2005 11:59 pm
Q
U
O
T
E
How do you guys get these things so screwed up.....
Compressor take the cool low pressure gas and makes it high pressure, then the condensor takes the excess heat out of the gas (now liquid) using the outside air (fan) and passes the liquid through the accululator/filter/dryer and then it goes through the expansion valve.  When the high pressure liquid squeezes through the small valve it expands rapidly into a low pressure area.  This is where all the cooling potential is.  This area is commonly known as the evaporator.  Then after the gas is heated some (by cooling the hot air in the car, which cools the cabin air and makes cabin colder) the now expanded and somewhat warmer gas goes back to the compressor to be compressed again into a liquid.
This is a VERY simple but accurate discription of the flow path, unlike the first post.  Why would a compressor make a high pressure into a lower pressure?  Then what would you do with it and how could it make anything colder???  Basic gas laws phrohibit such actions. ÂÂÂ
Read this if you have more questions.  It covers the basics fairly well.
http://home.howstuffworks.com/ac.htm
in auto a/c the refridgerant never goes into a liquid state. its either high pressure or low pressure/ high temp or low temp gas. while freon does have some water "vapor" in it, should never be confused with a liquid.
added: the accumulator/reciever-dryer takes the moisture out of the gas using dessicant or acts like a dehumidifier.
U
O
T
E
How do you guys get these things so screwed up.....
Compressor take the cool low pressure gas and makes it high pressure, then the condensor takes the excess heat out of the gas (now liquid) using the outside air (fan) and passes the liquid through the accululator/filter/dryer and then it goes through the expansion valve.  When the high pressure liquid squeezes through the small valve it expands rapidly into a low pressure area.  This is where all the cooling potential is.  This area is commonly known as the evaporator.  Then after the gas is heated some (by cooling the hot air in the car, which cools the cabin air and makes cabin colder) the now expanded and somewhat warmer gas goes back to the compressor to be compressed again into a liquid.
This is a VERY simple but accurate discription of the flow path, unlike the first post.  Why would a compressor make a high pressure into a lower pressure?  Then what would you do with it and how could it make anything colder???  Basic gas laws phrohibit such actions. ÂÂÂ
Read this if you have more questions.  It covers the basics fairly well.
http://home.howstuffworks.com/ac.htm
in auto a/c the refridgerant never goes into a liquid state. its either high pressure or low pressure/ high temp or low temp gas. while freon does have some water "vapor" in it, should never be confused with a liquid.
added: the accumulator/reciever-dryer takes the moisture out of the gas using dessicant or acts like a dehumidifier.