Patent ID: 6488077
Filing Date: 2002-12-03
Classification: G01F

Abstract:
Heating or air-conditioning system for ventilating an occupant compartment of a vehicle, comprising:a climatic box having a heat exchanger accommodated therein through which air can flow, in which is arranged: at least one air mixing chamber having a warm air inflow opening for warm air flowing through the heat exchanger, a cold air inflow opening for cold air flowing around the heat exchanger, and outflow openings for the mixed air, at least one of the outflow openings is arranged on bottom in the air mixing chamber for ventilating at least one of a foot space and a rear of the occupant compartment, and at least one outflow opening is arranged on top in the air mixing chamber for ventilating at least one of the center plane and the head area of the occupant compartment; and closing members for controlling the opening cross-sections of the inflow openings, wherein the cold-air inflow opening extends over an area of the upper as well as over an area of the lower mixed-air outflow openings, and the closing members for the cold-air inflow opening are constructed in two parts such that an upper closing member part is capable of completely covering an upper dimension area of the cold-air inflow opening and stopping flow therethrough and a lower closing member part is capable of completely covering a lower dimension area of the cold-air inflow opening and stopping flow therethrough, and the two closing member parts are controlled such that the lower closing member part in every closing member position covers a larger opening cross-section of the cold-air inflow opening than the upper closing member part.