Method of forming a vacuum chamber of a control valve for variable capacity compressor

摘要

A power element 2 of a control valve for a variable capacity compressor is pre-assembled in the atmospheric air by mounting a disk 14, a diaphragm 13, a disk 15, a spring 16 and a first housing 12 on a second housing 11 and caulking the peripheries of both housings 11, 12 and soldering or brazing the caulked junction. The pre-assembled power element 2 is placed in a vacuum container and only a small hole 20 formed in the first housing 12 is directly subjected to spot welding in the vacuum atmosphere to seal the small hole by weld metal 22. The vacuum chamber needed for the operation of the power element is formed according to a method needing a reduced number of steps only.