It plays the role of connection, for the air conditioner is a very important part, because in the connection between the internal and external units, you need to use the special copper pipe and joints, so that they can be connected together smoothly, and to ensure the normal flow of refrigerant. But if you do not use the special copper tube, then even if it can be successfully connected together, in the process of use, but also prone to refrigerant leakage phenomenon, thus affecting the cooling effect of air conditioning.
