JPH0719865Y2 - Air-conditioning air outlet of automobile air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to an air-conditioning air outlet of an automobile air-conditioning system for making the environment inside the vehicle comfortable.

2. Description of the Related Art Conventional air conditioners for automobiles include, for example, those shown in FIG. 7 (Japanese Utility Model Publication No. 5-20631 and Japanese Utility Model Publication 59-59).
170149, JP-A-61-79936, etc.).

In the figure, 31 is a duct, 32 is an air conditioner body, and 33a to 33d.
Is an outlet, 34 is a vertical air distribution plate (fin), 35 is a horizontal air distribution plate, 36
Is an actuator, 37 is a fan, 38 is a temperature detector, 39 is a reference temperature setting device, 40 is an evaporator, 41 is an air mix door, and 42 is a heater core.

A specific example of the outlets 33a to 33d is shown in FIG. Air conditioner body
The conditioned air generated in 32 is blown out by the duct 32 to the outlet 33 (33a
~ 33d) will be introduced. Then, the closing plate 43 is operated by the air-conditioning air closing lever installed in the passenger compartment operated by the passenger, and if the closing plate 43 is in a substantially horizontal state as shown by the solid line in FIG. If it passes and is introduced into the passenger compartment and is in the state shown by the dotted line in the figure, the air-conditioning wind will be the closing plate.
Since it is closed at 43, it is not supplied to the passenger compartment.

The air-conditioning air that has passed without being blocked by the closing plate 43 is controlled in the left-right direction of the vehicle compartment by a plurality of vertical air distribution plates 34 that are pivotally supported by a shaft 44, and then a plurality of laterally supported shafts that are pivotally supported by a shaft 45. The wind direction is controlled in the up-down direction of the vehicle interior by the air distribution plate 45, and the air is blown into the vehicle interior.

At this time, the lateral air distribution plate 45 is configured to operate at a common angle by a link mechanism, and a passenger usually sets the lateral air distribution plate adjustment knob 46 at the angle of the lateral air distribution plate 35.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional air conditioner for a vehicle, as shown in FIG. 9, the cross section of the lateral air distribution plate end portion 35a on the downstream side in the flow direction of the conditioned air is shown. Since the shape is a substantially semi-circular shape, when the flow of the conditioned air passes through the lateral air distribution plate 35, the flow separation area is large and an asymmetrical vortex 47 called Karman's vortex is generated. There was a problem that airflow noise was generated.

Therefore, when using a pseudo airfoil lateral air distribution plate 48 imitating the airfoil as shown in JP-A-61-79936 and JP-A-51-20631,
As shown in Fig. 10, the separation area becomes smaller and the airflow noise becomes smaller. However, in the pseudo wing type lateral air distribution plate 48, as shown in FIG. 11, when the occupant 49 takes a bird's eye view of the air conditioning air outlet 33 direction, as shown in FIG. Since the solar light incident on the vehicle reflects only slightly in the line-of-sight direction 50 of the occupant 49, the pseudo-wing lateral air distribution plate 49 looks thin (the reason will be described later), which may impair reliability. There was a problem.

Therefore, according to the present invention, in the air conditioning air outlet of an automobile air conditioner for adjusting the air flow direction of the air conditioning air by a plurality of horizontal air distribution plates which are supported in a substantially horizontal direction and are rotatable, the lateral airflow outlet is used. The lower surface of the downstream end of the horizontal air distribution plate located on the downstream side of the air-conditioning wind with respect to the center of rotation of the air distribution plate is composed of a horizontal plane that is horizontally continuous along the lower surface of the general portion of the horizontal air distribution plate, while The upper surface of the downstream end of the lateral air distribution plate is composed of an arc centered on the lower side apart from the lateral air distribution plate and descends toward the terminal at the downstream end, and the upper surface and the lower surface at the terminal at the downstream end. , Are continuous with an arc having a diameter smaller than that of the arc descending toward the terminal.

Action The upper surface portion of the lateral air distribution plate, which is located on the downstream side of the conditioned air, is formed of an arc having a large radius of curvature, so that the vortex generation region is small and the ventilation resistance is small.

In addition, when the occupant takes a bird's-eye view of the air-conditioning air outlet direction, the solar radiation incident on the upper surface of the lateral air distribution plate reflects in the direction of the passenger's line of sight. I feel that the wind board is thick.

Embodiment Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

First, the configuration will be described. Reference numeral 1 denotes an enclosure forming the outer wall of the air outlet, and 2a, 2b, 2c and 2d are lateral air distribution plates for controlling the air-conditioning wind in the vertical direction of the passenger compartment. Reference numeral 3 denotes a lateral air distribution plate adjusting knob, and the lateral air distribution plates 2a to 2d are configured to operate at a common angle by a link mechanism (not shown). Set the angles of the lateral airflow plates 2a to 2d. Reference numerals 4a, 4b, 4c and 4d denote vertical air distribution plates. In this embodiment, the groove forming body 6 having the groove 5 is converted into the rotation of the motor 7 by the gear mechanism 8 and the upper wall 1a of the casing 1 is converted. By moving along, it rotates and adjusts the air distribution in the left and right direction of the passenger compartment.

The horizontal air distribution plate 2 and the vertical air distribution plate 4 have the same air distribution function as the horizontal air distribution plate 35 and the vertical air distribution plate 34 of the conventional example, and thus a detailed description thereof will be omitted.

FIG. 2 shows a cross-sectional shape of the lateral air distribution plate 2 (2a to 2d) according to the present invention. The lower surface of the downstream end 10a of the lateral air distribution plate 2 (2a to 2d) located downstream of the rotation center 9 of the lateral air distribution plate 2 (2a to 2d) is the lateral air distribution plate 2 (2a to 2a). 2d) underside of general part 1
It is composed of horizontal planes that run horizontally along 1. On the other hand, the upper surface of the downstream end 10a of the lateral air distribution plate 2 (2a to 2d) is centered on the lower side apart from the lateral air distribution plate 2 (2a to 2d) and descends toward the end of the downstream end 10a. Large radius of curvature R
It is composed of 10 arcs. Here, the arc 10 is the upstream end 10b of the lateral air distribution plate 2 (2a-2d) located on the upstream side of the conditioned air.
It is connected to the upper flat portion 13 on the side.

Then, at the end of the downstream end 10a of the lateral air distribution plate 2 (2a to 2d), the horizontal plane continuous with the lower surface 11 and the arc 10 are
It is continued by an arc 12 having a small diameter D smaller than the arc 10.

The vertical air distribution plates 4a-4d are rotatably supported by the shaft 14 on the upper wall 1a and the lower wall 1b of the outlet casing 1 as shown in FIG. The shaft 14 is then moved to the second by the shaft 16 of the first link 15.
The second link 17 is engaged with the slot 5 of the groove forming body 6 by the shaft 19 and is rotatably supported by the housing 1 by the shaft 20.

Next, the operation will be described. According to the flow visualization experiment conducted by the inventor of the present application, as shown in FIG. 4, the vortex generation region 21 of the lateral air distribution plate 2 (2a to 2d) according to the present invention is described in FIG. It is slightly inferior in the case of the pseudo wing type lateral distribution plate 48
The vortex generation region 21 is considerably smaller than that of the conventional type described in the figure.

It is generally known that the smaller the vortex generation area is, the smaller the ventilation resistance is. If the shape of the lateral air distribution plate 2 according to the present invention is adopted, the end cross-sectional shape is substantially semicircular. It is possible to significantly reduce the ventilation resistance as compared with the conventional example shown in FIG.

For example, referring to the mechanical engineering handbook (revised 6th edition, 1979 Japan Society of Mechanical Engineers), Vol. 8, page 22, the elliptic cylinder-shaped resistance value C _D is 0.1 to 0.3, while the streamline is If the shape
It has been shown to decrease to about 0.06 to 0.12. This also shows that the lateral air distribution plate 2 according to the present invention has a great effect of reducing the ventilation resistance.

Next, when operating the lateral distribution plate adjustment knob 3, etc., the outlet 33
The operation when the passenger takes a bird's eye view will be described.

FIG. 5 shows how thick the lateral air distribution plates 2 (2a to 2d) look in the bird's-eye view from the position of the eyes of the occupant with respect to the sunlight.

The occupant recognizes the thickness as the reflected light in the range of about ± 10 ° with respect to the reflected light in the line-of-sight direction to the occupant when the incident solar light is reflected on the surface of the lateral air distribution plate 2. It was clarified by the experiments conducted by the inventors of the present application.

Therefore, when calculating the surface length 1 of the lateral air distribution plate 2 having this reflection angle of ± 10 °, the following formula is obtained: l = 20 ° / 360 ° × 2πR where l is the plane length of the reflecting surface, R Is the arc radius of the cross-sectional shape of the lateral air distribution plate 2.

Now, the thickness of the lateral air distribution plate 2 is 2.4 mm, the arc radius R is 3.6 mm, the line-of-sight direction is 2 ° from the horizontal direction, and the solar radiation incident direction is 75.
If it is °, then l = 1.25 mm.

FIG. 6 shows, as a reference, the surface reflection length 1 in the case of the conventional example in which the end sectional shape is a substantially semicircular shape.

Assuming that the conditions and the experiment for the conventional lateral air distribution plate are the same and the thickness is 2.4 mm, l = 0.42 mm.

From this fact, if the cross-sectional shape of the lateral air distribution plate 2 according to the present invention is used, it looks as a thick lateral air distribution plate from the position of the eyes of the occupant, and the ventilation resistance is reduced without impairing the reliability. It becomes possible. Further, in the present invention, downstream of the air distribution plate 2
Since 10a has a curvature and is smoothly connected to the lower surface of the air distribution plate 2, a part of the lower surface is also recognized as a thickness and it seems that the thickness is further increased.

If the arc radius R portion 10 is a straight line, it is not preferable because the range 1 that looks shiny changes depending on the direction of the line of sight and the incident direction of light, and if the area near the connection between the arc 10 and the flat upper surface portion 13 is a small diameter arc. It is preferable that the small-diameter circular arc portion shines.

Effect of the Invention Since the present invention is configured as described above, it has the following effects.

From the position of the eyes of the occupant, it looks as if it is a thick horizontal air distribution plate, which can increase the reliability and at the same time, because the horizontal air distribution plate can have a thickness and shape with low ventilation resistance, it can blow out air-conditioned air. The efficiency can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a lateral air distribution plate according to the present invention, FIG. 3 is a sectional view showing a vertical air distribution plate, and FIG. 4 is a book. FIG. 5 is an explanatory view showing a state of generation of vortices by the lateral air distribution plate according to the present invention, FIG. 5 is an explanatory view showing how the thickness of the lateral air distribution plate according to the present invention is seen, and FIG. 6 is a conventional lateral air distribution plate. FIG. 7 is a reference explanatory view showing how the thickness of the vehicle is viewed, FIG. 7 is a configuration diagram showing a conventional automobile air conditioner, FIG. 8 is a sectional view showing an air conditioning air outlet, and FIG. 9 is a conventional lateral air distribution plate. FIG. 10 is an explanatory view showing a vortex generation state, FIG. 10 is an explanatory view showing a vortex generation state due to the pseudo-wing lateral air distribution plate, and FIG. 11 is a diagram showing how the air outlet is seen from the eyes of the occupant. FIG. 12 is an explanatory diagram showing how the thickness of the pseudo-wing lateral air distribution plate looks. 1 ... Blowout port, 2a-2d ... Horizontal air distribution plate, 3 ... Adjustment knob,
4a-4d …… Vertical air distribution plate, 9 …… Horizontal air distribution plate rotation center, 10 ……
Arc, 10a …… downstream end, 10b …… upstream end, 11 …… bottom surface, 12
...... Small-diameter circular arc, 13 ...... Top flat part, 21 ...... Vortex generation area, 50 ...... Gaze direction reflected light.

Claims (1)

[Scope of utility model registration request] 1. An air-conditioning air outlet of an air conditioner for an automobile, wherein a plurality of lateral air distribution plates pivotally supported in a substantially horizontal direction and rotatable are used to adjust the direction of the air-conditioning air from the center of rotation of the lateral air distribution plates. The lower surface of the downstream end of the lateral air distribution plate located on the downstream side of the wind is composed of a horizontal plane that is horizontally continuous along the lower surface of the general part of the lateral air distribution plate, while the upper surface of the downstream end of the lateral air distribution plate. Is composed of an arc centered on the lower side apart from the lateral air distribution plate and descending toward the terminal at the downstream end, and the upper surface and the lower surface at the terminal at the downstream end, from an arc descending toward the terminal. An air-conditioning air outlet for an air-conditioning system for automobiles, characterized by being continuous with arcs of small diameter.