Vehicle air-conditioning apparatus

Abstract

Provided is a vehicle air-conditioning apparatus capable of setting a space formed between an upper surface of a heater core and a rotating shaft of an air mixing damper to a given axially-uniform space, thereby making the temperature adjustment easier and improving the temperature control performance. In a vehicle air-conditioning apparatus including an air mixing damper that has a rotating shaft disposed above an upper portion of a heater core, heater-core supporting parts that support only upper right and left shoulders of the heater core are provided on right and left side faces of a unit case, an upper surface of the heater core is supported by the heater-core supporting parts, and an space adjusting section that sets a space formed between the upper surface of the heater core and the rotating shaft of the air mixing damper to an axially-uniform space is provided on the air mixing damper.

1 . A vehicle air-conditioning apparatus in which an air flow path in a unit case is branched into a bypass flow path and a heating flow path at a downstream side of an evaporator; a heater core is disposed in the heating flow path; a rotating shaft is disposed above an upper portion of the heater core; and an air mixing damper that is made to turn about the rotating shaft to adjust the ratios of airflows to be circulated into the bypass flow path and the heating flow path is provided,
 wherein heater-core supporting parts that support only upper right and left shoulders of the heater core are provided on right and left side faces of the unit case, and an upper surface of the heater core is supported by the heater-core supporting parts; and   a space adjusting section that sets a space formed between the upper surface of the heater core and the rotating shaft of the air mixing damper to an axially-uniform space is provided on the air mixing damper.   
     
     
         2 . A vehicle air-conditioning apparatus according to  claim 1 , wherein the space adjusting section is structured such that an outer periphery thereof is an arc having the same center as a rotation center of the rotating shaft, so that the axial space can be set to the uniform space irrespective of a rotation angle of the air mixing damper. 
     
     
         3 . A vehicle air-conditioning apparatus according to  claim 1 , wherein the space adjusting section is integrally formed on the rotating shaft around the rotating shaft along the axial direction. 
     
     
         4 . A vehicle air-conditioning apparatus according to  claim 1 , wherein the space adjusting section is provided at least over a rotation angle range of the air mixing damper from a maximum cooling position to a maximum heating position. 
     
     
         5 . A vehicle air-conditioning apparatus according to  claim 1 ,
 wherein a protruding part that protrudes in a direction opposite to the air mixing damper with the rotating shaft therebetween is integrally provided on the space adjusting section; and   a seal member that abuts on the upper surface of the heater core in a vicinity of the maximum heating position to close the axial space is provided on the protruding part.