starnge device

hi every one
i have question
i saw a device in 2 ton window type air conditioner
the device is contain electric coil similar to reverse valve coil
and its connected to the compressor discharge pipe from one side and by 2 capillary tube to the entrance of evaporator
what its
these are photo for it

liq injection solonoid-in heating mode the outdoor cool can freeze up in low ambient- this squirts gas to raise the coil temp

thank you
can you explain more

https://rapidshare.com/files/4137667...ual_Part-1.pdf;
https://rapidshare.com/files/3320555...ual_Part-4.pdf;
https://rapidshare.com/files/2245014...ual_Part-3.pdf;
https://rapidshare.com/files/2244454...ual_Part-2.pdf;
https://rapidshare.com/files/2149991...ual_Part-6.pdf;
https://rapidshare.com/files/1140769...ual_Part-5.pdf;
this might help-your english is better than mine!:o

thank you pal
if you dont mind can upload these file to another upload sie
like media fire

http://www.mediafire.com/?mixu2n77h2kkl think ive done it!

the site sayed
you dont have the right to enter this folder
please help

try now-i tried it and it worked

thank you pal for your help
solved