当加热时,本体内的蜡膨胀,推动膜片,膜片推动柱塞,柱塞推动推杆,产生升程和推动力当冷却时,弹簧推动推杆回位。
When heated, the wax enclosed in the cup, expands and pushes against the diaphragm, the movement is transmitted via the plug to the piston. The guide
maintains the diaphragm, and allows the plug and piston to slide freely.An external spring ensures the return of the.Piston when cooling down.