The utility model discloses a stainless steel capillary tube for automobile air conditioner, including the
pipe body, the inlet end part of
pipe body is equipped with at least two taper different taper sections, and the taper section is arranged in proper order along the fluid flow direction and the through
diameter is gradually contracted, and the common constitution multistage taper throttling channel entrance, the taper section end part away from the
pipe body is equipped with the connecting section, and the connecting section outer
diameter is consistent with the taper section maximum outer
diameter, and the connecting section outer surface is the
welding cooperation surface, and the adjacent taper section is connected through the arc curved surface, and the taper section close to the pipe body and the pipe body entrance place smooth link, and the taper section close to the connecting section and the connecting section smooth link, and the pipe body includes the protection outer layer, the buffer layer and the throttling inner layer through in multistage taper throttling channel entrance setting taper different taper sections and arc transition curved surface, make
refrigerant pressure steady, gradual decrease, effectively restrain turbulence and
cavitation phenomenon, reduce vibration and
noise greatly, improve
system work stability.