The compressor is produced in a production line way. The components such as cylinder body, piston (rotary shaft), valve plate, connecting rod, crankshaft, and end cover are manufactured in the mechanical processing workshop (including casting); the rotor and stator are assembled in the motor workshop; the housing is manufactured in the stamping workshop. Then, in the final assembly workshop, processes like assembly, welding, cleaning and drying are carried out, and after passing inspection, the products are packaged and ready for delivery. Most compressor manufacturers do not produce starters and thermal protectors, but instead procure them from the market according to their needs.