Patent ID: 7585209

Claim:
An air-conditioning device for a vehicle, comprising: a fan for generating a given air stream; an evaporator arranged downstream of the fan and through which the given air stream flows; a distributor space arranged after the evaporator; control flaps between a first flow passage and a second flow passage, wherein the given air stream is configured to be divided by the control flaps such that generation of a first partial air stream and a second partial air stream is possible; a mixing chamber, wherein the first flow passage opens out into the mixing chamber; a heat exchanger arranged in the second flow passage for heating the second partial air stream, wherein the second flow passage opens out in the mixing chamber downstream of the heat exchanger, wherein generation of a mixed air stream from the first and second partial air streams in the mixing chamber is possible, wherein the control flaps are configured to divide the first partial air stream into first and second portions in which one of the first and second portions of the first partial air stream is directed to hotter air comprising the second partial air stream in the mixing chamber; air exit passages leading from the mixing chamber into different regions of the vehicle's interior, wherein each air exit passage is assigned with a switching flap on a mixing chamber side for controlling an air exit stream from the mixing chamber through the associated air exit passage, wherein at least one of the air exit passages is a defrosting passage used to generate a defrost air stream directly on an inner side of a vehicle window and opens out at a defrosting nozzle assigned to the vehicle window; at least one bypass passage through which a warm air stream can flow, wherein the at least one bypass passage branches off downstream of the heat exchanger, starting from the second flow passage upstream of the mixing chamber, and opens out directly into the defrosting passage; and a mixing flap assigned to the at least one bypass passage for controlling the warm air stream through the bypass passage, wherein the mixing flap and control flaps are arranged axially on a common pivot axle, wherein the mixing flap extends within regions in which the at least one bypass passage runs and the control flaps are formed in regions other than the at least one bypass passage, and wherein the mixing flap associated with the bypass passage is curved convexly in cross section and the control flaps are curved concavely in cross section.