what is the diff betwen reciprocating compressor and rotary compressor.in airconditioners.which one is better?

Answer 1

A reciprocating compressor usually uses a piston inside a cylinder (although certain diaphragm compressors use a reciprocating mechanism). Reciprocating compressors are more efficient than rotary compressors.

Rotary compressors may be of a variety of types. Two are shown at http://www.hvacindia.org.in/journals/2001apr/article02.html
but it's important to remember there are quite a few more types.

http://www.carel.com/carelcom/web/eng/mercati/compressore.jsp mentions a couple more, and expounds on the reciprocating type as well.

As to which one is "better," that all depends on what are the engineering objectives: a rotary compressor will generally provide greater volumetric capacity (of the refrigerant) in the same "package volume."

Some rotary compressors allow head pressure to bleed off through the compressor (as well as through the capillary tube); reciprocating compressors ordinarily double as a check valve.

For more information, see http://en.wikipedia.org/wiki/Air_compressor

and http://toad.net/~jsmeenen/compressor.html

Answer 2

I believe a reciprocating acts more as a piston where a rotary is like a fan pushing air Dont know which is better my guess would be reciprocating would have more pressure less strain but would probably be more expensive to manufacture