MX9704603A - Heating/cooling unit for an automotive air-conditioning device. - Google Patents

Abstract

The invention presents an automotive air-conditioning device heating/cooling unit comprising a cover, which has air inlet and outlet openings. An air-mixing chamber is placed just upstream from air outlet opening. A first air flow passage extends from air inlet opening towards air-mixing chamber. A second air flow passage extends from a first air flow passage downstream part towards air-mixing chamber. A third air flow passage extends downstream from air-mixing chamber. An evaporator is installed on a first air flow passage upstream part, to cool down air which passes through the same. A heating core is installed on second air flow passage to heat air passing through the same. A mixing door is disposed to control speed between air quantity directly guided towards mixing chamber from first air flow passage and air quantity guided towards second air flow passage from first air flow passage. Ventilation door is disposed to control speed between air quantity guided from air-mixing chamber towards air inlet opening and air quantity guided from air-mixing chamber towards third air passage. Evaporator and heating core are generally disposed parallel to one another and disposed to define an upstream portion between them from first air flow passage.