References: You Have To Cite Those Sources

COOL:
http://www.1wallpaperhd.com/2014/07/refrigerator-little-penguin-wallpapers-hd.html

Pump and Compressor:
http://g.vatgia.vn/gallery_img/9/uwl1409977027.gif

Condenser:
http://pad3.whstatic.com/images/thumb/7/79/Clean-Refrigerator-Coils-Step-2.jpg/670px-Clean-Refrigerator-Coils-Step-2.jpg

Evaporator:
http://www.applianceaid.com/images/364a.jpg

Expansion valve:
http://www.acr-news.com/news/images/652_1.jpg 

The Cycle:
http://www.wika.us/AN_0211_en_us.WIKA+