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A motor vehicle air conditioning unit having a housing, a heat exchanger, at least two manifolds and cooling tubes arranged therebetween forming a tube block. The housing has at least one first sealing rib oriented substantially parallel to an extending direction of the at least two manifolds and at

A motor vehicle air conditioning unit having a housing, a heat exchanger, at least two manifolds and cooling tubes arranged therebetween forming a tube block. The housing has at least one first sealing rib oriented substantially parallel to an extending direction of the at least two manifolds and at least one second sealing rib oriented substantially parallel to an extending direction of the cooling tubes in the tube block, such that the at least one first sealing rib is oriented perpendicular to the at least one second sealing rib.

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1. A motor vehicle air conditioning unit comprising: a housing;a heat exchanger that has two manifolds and tubes that extend between the two manifolds, the tubes being parallel to each other and arranged side by side forming a tube block, the two manifolds projecting beyond a front side and a rear s

1. A motor vehicle air conditioning unit comprising: a housing;a heat exchanger that has two manifolds and tubes that extend between the two manifolds, the tubes being parallel to each other and arranged side by side forming a tube block, the two manifolds projecting beyond a front side and a rear side of the tube block, the front side and the rear side being opposite one another;wherein the housing has at least two first sealing ribs extending along the two manifolds in a direction that is perpendicular to the longitudinal axis of the tubes, such that a first one of the at least two first sealing ribs extends along a first one of the two manifolds and a second one of the at least two first sealing ribs extends along a second one of the two manifolds for sealing the front side and/or the rear side of the tube block, andwherein the housing has at least two second sealing ribs extending along the tube block in a direction that is parallel to the longitudinal axis of the tubes for sealing the front side and/or the rear side of the tube block, such that the at least two first sealing ribs extend perpendicular to the at least two second sealing ribs and the at least two first sealing ribs and the at least two second sealing ribs form a rectangular sealing frame around the front side and/or the rear side of the tube block. 2. The motor vehicle air conditioning unit according to claim 1, wherein the at least two first sealing ribs rest on the front side of the tube block and wherein the at least two second sealing ribs rest on the front side of the tube block. 3. The motor vehicle air conditioning unit according to claim 1, wherein the at least two first sealing ribs are oriented at an acute angle towards the front side of the tube block and/or the rear side of the tube block. 4. The motor vehicle air conditioning unit according to claim 1, wherein the at least two first sealing ribs, the at least two second sealing ribs and at least one housing manifold section form a single piece with the housing or a housing part,wherein the at least one housing manifold section has at least one predetermined breaking point,wherein the housing has a two-part design including a housing upper part and a housing lower part,wherein a portion of an inner contour of the at least one housing manifold section matches a portion of an outer contour of the at least two manifolds, and the at least one housing manifold section rests on the at least two manifolds, andwherein another portion of the inner contour of the at least one housing manifold section has a ramp or wedge that is adapted for moving the heat exchanger in a direction of the at least two first sealing ribs and the at least two second sealing ribs when the heat exchanger is inserted into the housing or into the housing part. 5. The motor vehicle air conditioning unit according to claim 1, further comprising: a heater for heating any air conducted through the motor vehicle air conditioning unit;a blower;an air filter;an air duct which is delimited by the housing; andat least one air conducting device or a damper or corrugated ribs arranged between the tubes. 6. The motor vehicle air conditioning unit according to claim 1, wherein the heat exchanger is a refrigerant evaporator. 7. The motor vehicle air conditioning unit according to claim 1, wherein an end of one of the at least two first sealing ribs contacts an end of one of the at least two second sealing ribs. 8. The motor vehicle air conditioning unit according to claim 1, wherein the first one of the two manifolds is positioned on a top side of the tube block and the second one of the two manifolds is positioned on a bottom side of the tube block, wherein a front side of each of the two manifolds corresponds to the front side of the tube block and a rear side of each of the two manifolds corresponds to the rear side of the tube block,wherein a bottom side of each of the two manifolds faces openings of the tubes of the tube block and a top side of each of the two manifolds opposes the bottom side thereof, respectively. 9. The motor vehicle air conditioning unit according to claim 1, wherein a portion of each of the at least two first sealing ribs directly rests on the front side and/or the rear side of the tube block.