Heat exchanger e.g. vaporizer, for air conditioning motor vehicle, has injection pipe with passage openings, where free flow cross section of openings in fluid guiding direction to heat transmitting surface satisfies specific condition

摘要

The heat exchanger has an injection pipe (4) with passage openings (9`) via which a cooling medium is distributed to a partial region of the exchanger. Units forming a heat transmitting surface are directly or indirectly connected with the pipe via the passage openings. A free flow cross section of the passage openings in a fluid guiding direction to the heat transmitting surface satisfies a specific condition. A suction pipe has an inner diameter between 4.5 millimeter and 6.0 millimeter.