Replies

1. GBA Editor
   Martin Holladay | Aug 28, 2013 09:21am | #1

   Ho Y Nam,
   I suggest that you use Google (or a textbook) to answer your questions. I'm no expert in capillary tubes, but this is what anyone (including you) can learn by Googling:

   http://wiki.answers.com/Q/What_is_the_function_of_capillary_tube_in_air_conditioning
   A capillary tube is "a tube used to transmit internal refrigerant pressure from a remote sensing bulb to an expansion valve diaphragm."

   http://www.brighthubengineering.com/hvac/58420-capillary-tube-for-refrigeration-and-air-conditioning-systems/
   "Capillary tube is one of the most commonly used throttling devices in the refrigeration and the air conditioning systems. The capillary tube is a copper tube of very small internal diameter. It is of very long length and it is coiled to several turns so that it would occupy less space. The internal diameter of the capillary tube used for the refrigeration and air conditioning applications varies from 0.5 to 2.28 mm (0.020 to 0.09 inches). Capillary tube used as the throttling device in the domestic refrigerators, deep freezers, water coolers and air conditioners."

   For an in-depth discussion of capillary tubes, see THEORY AND FIELD PROBLEMS OF THE CAPILLARY TUBE.

   Google even allows you to search for photos. You can come up with photos like the one shown below.

   .

   
2. 
   Bernard Ho | Aug 28, 2013 10:38am | #2

   ok...=) anyway thank you for your information