A new comer need some refrigration company information

I'm a Chinese student major at Automation and a new comer here.
I do want some information about refrigeration company in the world for my research.
May be there are some thread that have mentioned that.Please give a link.
I have download some document from Carel,Eliwell and Danfoss.That's a huge work to find out their difference.So please give a brief words to describe their difference,thx.:p

Any product information about Danfoss,Emerson,Carel,Eliwell(or Invensys) is highly welcomed.thx again.

You have downloaded documents and we could give you more documents to download but do not understand what it is you want.

Yes, there are differences between manufacturers, there always is.