Vehicle air conditioning device

A vehicle air conditioning device, comprising:

• a unit case including an air flow channel formed therein, the air flow channel being branched into a bypass flow channel and a heating flow channel;
• and
• a heater core installed on a bottom surface side of the heating flow channel, the heater core including upper-part right and left shoulder portions;
• wherein the unit case includes upper-part shoulder supporting portions for the heater core, each of the upper-part shoulder supporting portions for the heater core being respectively formed integrally with right and left side inner surfaces of the unit case and protruding by a predetermined length from the right and left side surfaces of the unit case, respectively, toward the upper-part right and left shoulder portions of the heater core, respectively, the predetermined length being a length to support only the upper-part left and right shoulder portions of the heater core and not an entire surface of an upper part of the heater core,
• wherein only a projecting end of each of the upper-part shoulder supporting portions for the heater core formed integrally with the unit case has a C-channel shape in cross-section consisting of an upper-surface holding surface, a front-side-surface holding surface, and a back-side-surface holding surface,
• wherein each of the upper-surface holding surface, the front-side-surface holding surface, and the back-side-surface holding surface only supports an upper surface, an upper part of a front side surface, and an upper part of back side surface of the upper-part right and left shoulder portions of the heater core, respectively,
• wherein the upper-part shoulder supporting portions for the heater core do not support right and left end surfaces of the heater core, and
• wherein the vehicle air conditioning device blowing off, into a chamber, an air flow made after joining together an air flow that has passed through the heating flow channel and an air flow that has passed through the bypass flow channel.