The structure of the wall-mounted split air conditioner includes: compressor, condenser, evaporator, four-way valve, one-way valve capillary assembly, etc. The working process of a specified tooth volume pair in a wall-mounted split air-conditioning compressor. The gas on the side of the female screw and the male screw turning to cater to each other is compressed, and this side is called the high pressure zone; on the contrary, the side of the screw turning away from each other, the volume between the teeth is expanding and in the suction stage, which is called the low pressure zone. These two areas are separated by the contact line between the tooth surfaces of the female screw and the male screw. It can be approximated that the plane of the two screw axes is the boundary between the high and low pressure zones.
