开启式的直接卸下排油螺栓，然后按型号，规格定量加注冷冻油，封闭式的比较繁琐。

The open type directly removes the oil drain bolt, and then quantitatively fills the refrigerant oil according to the model and specification. The closed type is more cumbersome.

小型的家用空调排空制冷剂，拆卸电源，用焊枪焊下高低压管卸下压缩机，倒掉旧的冷冻油，按规定加注新的冷冻油，注意要启动压缩机由低压管吸入，然后安装压缩机焊接高低压管，比较后抽真空加制冷剂。　

Small household air conditioners drain the refrigerant, disassemble the power supply, weld down the high and low pressure pipes with a welding gun, remove the compressor, pour out the old refrigerant oil, and fill in new refrigerant oil according to the regulations. Pay attention to start the compressor to be sucked in by the low pressure pipe, then install the compressor, weld the high and low pressure pipes, and finally empty the air to add refrigerant.　

大型的空调要把制冷剂收到储液罐里，关闭阀门→拆卸电源→拆卸压缩机→排油→加注新油→安装定位，抽真空，打开阀门，雪种不用换。

Large air conditioners should receive the refrigerant into the liquid storage tank, close the valve → remove the power supply → remove the compressor → drain the oil → fill in new oil → install and position, vacuum, open the valve, and the snow seed does not need to be changed.