JPS58206411A - Intake unit for car air conditioner - Google Patents

Abstract

PURPOSE:To reduce the ventilation noise and resistance while to lighten the operating force, by constructing an inner and outer air exchange door such that a pair of drum type doors splitted radially is rotated by a link mechanism provided in the center of shaft. CONSTITUTION:When bringing drum type doors 15A, 15B to the state shown on the drawing, the circumferential faces of the doors 15A, 15B will choke the inner air intake ports 16A, 16B to enable taking in of the outer air. While the doors 15A, 15B are rotated by a link mechanism not shown to move to the position of said port 17 to overlap a portion, then the inner air take-in ports 16A, 16B will open and exchanged to the inner air taking-in. With such structure, only a shaft 14A exists on the ventilation path between the outer air take-in port 17 and the blower 5, the ventilation resistance and the bleezing are reduced. While since the door operating force is not influenced by the take-in air pressing force, the operating force is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an intake unit of an air conditioner for an automobile, and relates to an inside/outside air switching door mechanism.

In an automotive air conditioner, air from inside and outside is taken into an intake unit and sent under pressure to a cooling unit and a heater unit. As an example of the intake unit, there is one shown in FIG. 1, for example.

The intake unit/is attached to the dash upper panel 2 so that the outside air intake of the intake box 3 is in communication with the intake unit, and the intake unit 5 is attached to the other end of the intake box 3. There is an inside/outside air switching door inside the intake box 3.
A and 4B are installed in a double-door style. This switching door jA
, 4B is the same air intake port ♂A, ♂B provided on the side of the box when the stopper is operated to the 7th position as shown by the solid line.
Are you shy? Intake, inside air intake FA as shown by the dashed line.

tB1f When operated to the closing position, the air box 10 and hood 10 formed by the Kakurutonbu panel and Danoshu upper Hanelco are connected to the outside air intake from the outside air? Take in.

The operating shafts of the internal and external air switching doors jA and B are connected to a link mechanism or actuator outside the intake box 3 to adjust the internal and external air. Here, the inside/outside air switching door 4A
, 4B are configured to have seven doors if the intake box 3 has a sufficient height. However, in recent years, there has been a trend to reduce the height of the intake box entirely due to car body structure issues such as styling and ensuring visibility, as well as improving comfort such as securing leg space between the Proa 5 and the dash lower panel/J. ■As shown in the figure, the 2-panel type internal/external air switching door TM, 4B, is widely adopted.

However, in such a conventional device, the door stopper 7 is required in the center of the intake box because of the single door, and this stopper 7 has problems with increasing ventilation resistance and noise due to the intake of outside air. A hot friend. Place the operating axis of the outside air switching door and jB on the boundary.
The link mechanism connecting both shafts becomes larger. Furthermore, door 4A
, 4B has the operating force to overcome the flow of intake air and switch to outside air? Therefore, a relatively large operating force is required7.
t□ The present invention solves the conventional problems by using an outside air switching door that rotates using a link mechanism that has a pair of drum-shaped doors divided in the radial direction and located at the axis. The purpose is to provide intake money that has been eliminated.

FIG. 2 is a diagram showing an embodiment of the present invention. Intake box/3-piece center coaxial door operation] III/4'A
/Hiro Bi, as shown in the exploded view in Figure 3, is a drum-shaped door divided into fan shapes when viewed from the side by the shaft /GA /3 A
A drum-shaped door 15B, which has the same shape as the door tSM and whose radial dimension is smaller than the shaft BIC by the thickness of the door 15A, is pivotally supported. The intake box 13 is a door/
Internal air intake in the position where the drum phase of JA and /sB faces /
4A and /AB are provided, and an outside air intake port 17 is provided on the Mayu dash upper panel 2 side.

The axes t*A and tdaB are connected to the 11-link mechanism shown in Figure 84 outside the intake box, and are rotated by operating the operating bar is in the direction of the arrow.

In this type of fence construction, drum-shaped doors/
A, /3B are operated to the state shown in FIG. 2, and the peripheral surfaces of doors ish and tsB block the inside air intake ports /6A and /6B, and the outside air intake port 17rIC is opened. Also, for inside air intake, doors /3A and /3B are installed at door 15 as shown in Figure 5.
A part of M and /jB overlap and the outside air intake /7i
Base, open air intake ports /6A, /ABYr.

According to this embodiment, only the shaft A is present in the air path from the outside air intake port 17 to the blower SL, and the increase in ventilation resistance is small compared to the conventional sealing stopper 7, resulting in less wind noise. [1. It also reduces costs. 1 is also the operating shaft of doors 15A and 13B /4CA, /4'B is /
Since it can be fixed at point vc1, the link machine *V can be simplified, reliability can be improved, and costs can be reduced. Also, door /3A, /
3B operation vcFi intake vacancy is door l! 5A,/! ;B
The operating force is unrelated to the pressure applied to the machine, resulting in a light-load operation.

In addition, in the example, when operating the door tsh, tsB2 coaxial link mechanism? As shown, this is done by separately supporting the left and right center ends of the drum in the box 111 and rotating it using a metal ring link mechanism at the center end.

It is also possible to remove the shaft from the air passage.

As described above, according to the present invention, internal and external air can be switched by rotating the drum-shaped door. This has the effect of completely reducing the operating force, simplifying the operating mechanism, and creating a pro-a unit with less ventilation noise and less ventilation resistance.

[Brief explanation of the drawing]

Figure 1 shows the conventional intake unit)! FIG. 2 is a side sectional view showing an embodiment of the present invention. Figure 3 is an exploded view of the door in Figure 2, and Figure 4 is the operating link mechanism in Figure 2? The figure shown in Figure 5 is the air intake letter 11 in Figure 2? FIG. l...Intake unit, λ...Datsunyuatsuno (-panel, 3...Intake box, S...Blower, 7...Stock bar, /J...Intake box, /44A. l Graduate B ...Operation axis, /3, /3B...Drum-shaped door, /AA, /!B...Inside air intake, /7...Outside air intake, 1g...Operation reno (-0 Figure 1 Figure 2 @ Figure 3 Figure 5

Claims (1)

[Claims] In an intake unit of an automotive air conditioner equipped with a circular outside air switching door that communicates with all the blower sides of the outside air intake or inside air intake of the intake box, the inside and outside air switching door has a pair of drum-shaped doors divided in the radial direction. An intake unit for an air conditioner for an automobile, characterized in that the door peripheral surface closes one of an outside air intake port and an inside air intake port and opens the other by rotating with a link mechanism held at an axial center position.