Patent ID: 7451782
Filing Date: 2008-11-18
Classification: F16K,Y10T

Abstract:
1. A flow path control valve, comprising: a housing formed with a valve chamber that communicates fluidly with an inlet and an outlet; an opening/closing member installed movably within the valve chamber for moving between an opening position and a closing position to open or close a passage between the inlet and the outlet, a side of the opening/closing member including a pressure equilibrium hole for causing the valve chamber to be in fluid communication with the inlet; an elastic member installed within the valve chamber to bias the opening/closing member toward the closing position; a bypass tube provided to discharge a fluid, which has been introduced into the valve chamber through the pressure equilibrium hole, to the outlet; a float for opening and closing the bypass tube; a solenoid installed at a side of the housing to electromagnetically move the opening/closing valve and to electromagnetically move the float; an auxiliary valve chamber formed between the outlet and a discharge portion of the valve chamber; an auxiliary opening/closing member movably installed in the auxiliary valve chamber to move between an opening position and a closing position where the auxiliary opening/closing member opens and closes a passage between the outlet and the discharge portion of the valve, respectively; an auxiliary elastic member disposed within the auxiliary valve chamber to bias the auxiliary opening/closing member to the closing position; and an auxiliary pressure equilibrium hole formed at a side of the auxiliary opening/closing member to cause the auxiliary valve chamber to be in fluid communication with the outlet of the housing.