초록 ▼

A mix door (5) is arranged in air passages (10, 11) of an automotive air conditioning device. The mix door (5) is arranged to extend in a direction to shut an air flow blown from the upstream air passage (10) and swelled in a downstream direction with a predetermined radius of curvature. The door (5

A mix door (5) is arranged in air passages (10, 11) of an automotive air conditioning device. The mix door (5) is arranged to extend in a direction to shut an air flow blown from the upstream air passage (10) and swelled in a downstream direction with a predetermined radius of curvature. The door (5) is guided by arcuate cam grooves (19) and driven upward and downward to achieve open/close operation with the aid of a sliding mechanism (M). Compact construction, reduction in air flow resistance, smoothed handling, high sealing and high temperature controlling are achieved.

대표청구항 ▼

1. An automotive air conditioning device comprising: a case; an evaporator installed in said case for cooling air led into the case; a heater core installed in said case at a position downstream of said evaporator; a mix door arranged between said evaporator and said heater core to selectively

1. An automotive air conditioning device comprising: a case; an evaporator installed in said case for cooling air led into the case; a heater core installed in said case at a position downstream of said evaporator; a mix door arranged between said evaporator and said heater core to selectively lead the cooled air from said evaporator to one of a passage for said heater core to produce warmed air and a bypass passage bypassing said heater core or lead the cooled air to both the two passages at a predetermined distribution ratio; a mixing chamber for collecting and mixing the cooled air and the warmed air, wherein said case having a plurality of walls, a plurality of blowing openings formed in inside walls of said case by which said mixing chamber is defined; a plurality of mode doors for selectively opening and closing said blowing openings; and a door mechanism of the automotive air conditioning device, said door mechanism comprising: at least one of the mode doors, the mode door being a sliding type door which, with the aid of a sliding mechanism, slides on and along a given way defined by one of the inside walls to selectively open and close two of said blowing openings, wherein the other of the mode doors is so arranged that even when operated, it does not enter the area of said mixing chamber which is defined by said sliding door and the inside walls, the other of the mode doors being positioned downstream of the sliding type mode door, and positioned in a passage that has at least one wall defined by at least one of the inside walls of said case by which the mixing chamber is defined, and arranged to selectively open and close at least two of said blowing openings; and wherein said sliding mechanism comprises a toothed portion formed on a door proper of said sliding type mode door, a gear meshed with the toothed portion, a driving device connected to said gear, guide members possessed by said door proper, and cam grooves formed in said case for slidably receiving therein said guide members, said cam grooves being constructed and arranged to allow said door proper to slide on and along a curved surface of said one of the inside walls by which said mixing chamber is partially defined. 2. A door mechanism of the automotive air conditioning device as claimed in claim 1, wherein said sliding type mode door has an arcuate cross section. 3. A door mechanism of the automotive air conditioning device as claimed in claim 1, wherein said gear is constructed to produce a detent engagement when rotated while being meshed with said toothed portion of said sliding type mode door. 4. A door mechanism of the automotive air conditioning device as claimed in claim 3, wherein said gear is formed with mechanically weaker holding portions in given portions thereof, said mechanically weaker holding portions extending circumferentially inside the teeth of said gear.