There are several copper tubes inside and outside the air-conditioner
The small pipe is a high pressure pipe, and the thick pipe is a low pressure pipe.1. The special copper tube and fittings for the connection of the outdoor machine and the indoor machine are to connect the indoor machine and the outdoor machine.2, the connection through the tube is cold medium (freon, commonly known as snow species).
3, such as in the refrigeration mode (that is, summer), the indoor machine absorbs the indoor heat (exhaust air conditioning), the snow species into low pressure, medium temperature snow species, after a larger copper tube out to the outdoor machine. You can feel the larger copper tube with your hands and feel colder, and the surface will have water.4, the snow through the copper pipe out of the outdoor, compressed by the compressor, high temperature, high pressure, snow into the outdoor heat exchanger heat (fan rotation).
5, then snow variable medium temperature and medium pressure refrigerant by another (a small brass) into the room, into the indoor machine through the throttle valve (or a capillary expansion valve, etc.) is the throttle section size is very small, but after the throttle valve for the volume suddenly become larger, so for the moment the snow will become low temperature and low pressure refrigerant, and endothermic.6, this completes a refrigeration cycle. In the case of heat cycles, the opposite is true. In this way, you should understand the function of the two copper tubes.7, two pipes are connected to the indoor machine, generally smaller into the tube, the more rough for the tube. The difference between the inlet pipe and the outlet pipe is that the inlet pipe is thinner, and there is a capillary or a thermal expansion valve at the back, and the outlet pipe interface is larger.
