[TheForge] OT Anyone out there knowledgeable about automobile air conditioners and/or 12VDC motors?

[CraigSchaefer]

You'd need a motor of several horsepower to spin the compressor, plus the cooling fan.    I have not seen the climate control system on a Nissan Leaf, but that might be an option to somehow retrofit its heating cooling system into a vehicle.   You'd then need batteries, but it would be a self contained system. 

I've thought of something like this for my truck when travelling and I need to leave the dogs in the vehicle for a short while without it getting hot inside. 



CraigS 
Gresham, OR 



----- Original Message -----


From: "Bruce ." <freemab222 at gmail.com> 
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net> 
Sent: Wednesday, September 5, 2012 4:39:04 AM 
Subject: [TheForge] OT Anyone out there knowledgeable about automobile air conditioners and/or 12VDC motors? 

I'm asking this here because of the diversity of knowledge of the 
participants in this forum.We can take this discussion off-line. 
Please respond to me directly at freemab222 at gmail.com . 

Did you see this: 
http://www.nypost.com/p/news/local/hizzoner_cold_feat_lYxDIMuat7x4PL7nUbdBEM 
? 

Well, that just struck me as dumb -- attaching a 120VAC window A/C to 
pre-cool a car.  But then I noticed that some (or maybe ALL?) RV's 
have "window-style" 120VAC A/C's mounted on them and I got to 
wondering about it.  Of course, these RV's typically are parked at a 
120VAC electrical hookup when not being driven, so the 120VAC A/C is 
the simplest solution.  But what about for remote use?  Say, a person 
who works out of his car in hot weather and finds he only has the 
choice of running the engine or sweltering? 

It seems to me that one could use the engine-driven A/C unit of a 
vehicle to cool the vehicle without running the engine.  You'd need an 
extra (12V?) motor to drive the compressor and you'd need a fan -- the 
electric radiator fan might work -- to blow air over the A/C heat 
exchanger.  You'd have to use the motor to drive the compressor. 

As I understand it, a car A/C already has a slip-clutch on its 
compressor pulley so that the compressor only runs when called upon to 
do so.  Maybe the motor could be mounted directly to the compressor 
shaft.  Or perhaps there's a better way, maybe involving a double 
pulley or something.. 

Does this sound feasible? 

Ignore for the moment space constraints -- like where could you FIT 
the electric motor.  Also ignore power constraints -- like, how 
quickly would the electric motor driving the compressor run the 
battery down.  Those obviously are issues, but they're secondary to 
the question. 

Anyone? 

-- 
Bruce 
NJ 
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