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发表于 2018-2-11 22:04
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I understand your concern, but you will not find a car coming from the manufacturer which has insulation around the piping. If you think about it, though, it makes sense and here are three reasons why you shouldn't worry about it:
The cold side of the piping is after the evaporator, headed back to the compressor. Any loss here will not make a difference in the overall performance or efficiency of your AC unit. (In the graphic, it's the pipe from the evaporator to the compressor.)
Since the system is designed without the insulation, it may actually be detrimental to some of the working parts for it to be colder (may cause freezing of moving parts/evaporator). Engineers have taken all of this into account when designing the AC unit in the first place.
Remember in order for condensation to form on this pipe it only has to meet two conditions: 1) pipe has to be cooler than the dew point; 2) there has to be humidity in the air. These conditions are very easily met in most situations.
Vehicle AC units are work pretty darn well (even with R134a in them) considering what they have to do and the amount and quickness of cooling they have to do. Why mess with success. If you do, you could be introducing dynamics into the system they weren't designed for and you won't being doing much to improve the efficiency (if you improve it at all).
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