APPARATUS OF CONTROLLING AIR PRESSURE IN REFRIGERATER

PURPOSE: An air pressure control apparatus for a freezer including a membrane filter for gas separation is provided to balance the outside air pressure and inside air pressure of the freezer when a freezer door is opened and closed to thereby maintain appropriate inside and outside air pressures of the freezer. CONSTITUTION: An air pressure control apparatus for a freezer including a membrane filter for gas separation includes an inner side grill(1), a case(2), a first ventilation valve plate, a second ventilation valve plate, an air pressure control valve, an internal tube(4), an external tube(6), and an outside grill. The inner side grille includes a plurality of communicating holes communicated with the inside of the freezer. One side of the case is combined with the outer circumference of the inner side grill. The other side of the case has an extended part which is projected. Four holes are formed in the center of the inside of the extended part. The air pressure control valve includes the second ventilation valve plate. The internal tube includes a vent into which the extended part of the case is inserted. The external tube is combined with the internal tube. The outside grill includes a plurality of communicating holes communicated with the outside of the freezer.