JPS60200039A - Air direction control device for air conditioner - Google Patents

Abstract

PURPOSE:To expand an upstream air passage, reduce a resistance in air passage and extend a reaching distance of blown air by a method wherein an air blowing port is throttled by a guiding surface. CONSTITUTION:A guide surface 9 for reducing a blow air is arranged at an air blowing outlet port 3 of a duct 1, the guiding surface 9 is formed by bending upper and lower side surfaces 11 and 11 and right and left side surface 13 and 13 of the duct 1 inwardly to each other, a section area of the duct 1 has a wider upstream area and the down stream side is formed to have a restricted area at the maximum metering part 15. The guide surface 9 has a specified rate of curvature R, longitudinal louvers 5 surrounded by the guiding surfaces 9 are inclined in such a way as their upper and lower end surfaces may extend along the rate of curvature R. The extremity ends are abutted against the guiding surfaces 9 when the longitudinal louvers 5 are inclined at the most in a leftward or rightward direction so as to seal a space between the duct 1 and the louvers. With this arrangement, it is made possible to reduce a resistance in air passage, reduce a leakage of air and provide an efficient guiding of blown air.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention is applicable to air conditioning wind direction adjustment which adjusts the direction of air blown out from the air outlet of a duct installed in an automobile instrument panel, for example. Regarding equipment.

(b) Technical background and problems Vehicle air conditioners draw in outside air or inside air with a proa fan, exchange heat with a cooler or heater core installed in a duct, and send the heat exchanged air to the ventilator outlet and the floor outlet. and is configured to selectively blow out from the defroster outlet. For example, as shown in FIG. 1, the ventilator outlet communicates with a plurality of air outlets 103 provided in the instrument panel 101 of the automobile, and can blow out cold or warm air toward the occupants. ing.

By the way, this type of air conditioning wind direction adjustment device has conventionally been configured as shown in FIGS. 2 and 3, for example. (Refer to Utility Model Application No. 58-2536) In other words, 105 is a duct communicating with the air outlet 103, and a proa fan (
Not shown. ) to blow cold air in the direction of the arrow or if! J
il is blown out. The cross-sectional area of this duct 105 is narrow on the upstream side with a width Lo, and wide on the downstream side with a width <L+.The extended section 107 of the duct 105 has a vertical louver 109 that changes the wind direction left and right, and a horizontal louver 109 that changes the wind direction up and down. Louvers 111 are provided separately on the upstream side and the downstream side.

Therefore, the vertical louver 109 and the horizontal louver 111
By tilting the windshield, the wind direction can be changed horizontally and vertically, and the wind direction can be adjusted to suit the passenger's preference.

However, in such a conventional wind direction adjustment device, the upstream side of the duct h 105 is formed narrowly, so the ventilation resistance is large, and the downstream side is wide, so the wind expands near the air outlet 103, causing the wind to expand near the air outlet 103. There is a risk that eddy currents such as the one shown in FIG. Furthermore, due to the above-mentioned reasons, the wind force decreases, and the wind reaching the rear passengers is weak.
There is a risk that the air inside the vehicle cannot be air-conditioned quickly.

(c) Purpose of the Invention This invention was made in view of the above-mentioned problems, and it is possible to reduce the general resistance and also to make the blown air constricted so that the reaching distance of the blown air is not extended. To provide an air conditioning wind direction adjusting device capable of efficiently guiding blowing air in the direction of a louver.

(d) Constitution of Defense In order to achieve the above object, the present invention narrows the outlet of the duct and provides a guide surface having a curvature that allows the tip of the louver to come into contact when the louver is rotated to change the wind direction.

(e) Examples Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIGS. 4 and 5 show a wind direction adjusting device used in a vehicle air conditioner, and 1 is a wide duct, including a proafan (not shown). ), cold air or l1il is blown out in the direction of the arrow. The tip of this duct 1 communicates with an air outlet 3. A vertical louver 5 for changing the wind direction left and right is provided on the upstream side of the air outlet 3, and a horizontal louver 7 for changing the wind direction up and down is separately provided on the downstream side. By tilting this vertical louver 5 in the left-right direction,
Further, by tilting the horizontal louvers 7 in the vertical direction, the wind direction can be adjusted according to the passenger's preference. Furthermore, a guide surface 9 is provided on the air outlet 3 side of the duct 1 to cause the blown air to contract.

This guide surface 9 is formed by curving both upper and lower side surfaces 11.11 and both left and right side surfaces 13.13 of the duct 1 inwardly. Therefore, the cross-sectional area of the duct 1 is wide on the upstream side and has a width of 11, and narrow on the downstream side due to the maximum constriction part 15.
is formed to have a constant curvature R in order to cause the Suita air to contract. The tangential direction of the guide surface 9 at the maximum narrowing portion 15 is inclined more than the maximum inclination of the vertical louver 5 in the left-right direction. The vertical louver 5 surrounded by the guide surface 9 has both upper and lower end surfaces inclined along the curvature R, and the vertical louver 5 is tilted to the left or right to the maximum. When this is done, the tip comes into contact with the guide surface 9, making it possible to seal between it and the duct 1.

Next, the action will be explained.

For example, during cooling operation, air sucked in from indoors or outdoors is heat-exchanged into cold air by a cooler,
The air is blown into the room from the air outlet 3 through the duct 1.

At this time, the direction of the cold air can be changed by tilting the vertical louvers 5 to the left or right. At this time, when the vertical louver 5... is tilted to the left to the maximum, the tip of the vertical louver 5 on the leftmost side (as shown in Figure 4) can come into contact with the guide surface 9 and seal as shown at the left end in Figure 4. At the right end in FIG. 4, the air guided by the guide surface 9 is guided toward the left-right center of the air outlet 3 with a slope stronger than that of the vertical louver 5.

Therefore, on the one hand, it is possible to prevent air leakage and on the other hand, to prevent eddy currents, so that cold air can be efficiently blown out in the direction of inclination of the vertical louvers 5 . Therefore, the efficiency of supplying cold air especially to the front seat occupants is improved, and a feeling of cooling can be provided quickly.

Furthermore, when the vertical louvers 5... and the horizontal louvers 7... are placed in a neutral state, the cold air from the duct 1 is contracted by the guide surface 9, so the flow velocity of the cold air increases and it is blown out from the air outlet 3. . Therefore, the speed at which the cool air reaches the rear seat occupants increases, providing a feeling of air conditioning earlier, and the air contraction reduces the amount of air that hits the links that drive the horizontal louvers 7, reducing noise. .

In the above-mentioned embodiment, a constriction part was formed to constrict the opening of the duct 1 from the top, bottom, and left and right directions, but even if the constriction part 9 is provided only on both left and right side surfaces 13 and 13 of the duct 1, the flow contraction effect will not be achieved. can get.

(F) Effects of the Invention As is clear from the above, according to the configuration of the present invention, the air outlet is narrowed by the guide surface, so the upstream air passage can be expanded, and ventilation resistance can be reduced. At the same time, it is possible to extend the reach of the blowing air. Furthermore, since the tip of the louver hits the guide surface when changing the wind direction, there is little air leakage, and since the Suita wind is guided in the direction of inclination of the louver with a constant curvature, the outflow wind can be efficiently guided.

[Brief explanation of the drawing]

Fig. 1 is a front view of the instrument h panel, Fig. 2 is a cross-sectional plan view of a conventional wind direction adjustment device, Fig. 3 is a perspective view also showing the louver, and Figs. 4 and 5 are one embodiment of the present invention. For illustrating an example, FIG. 4 is a cross-sectional plan view, and FIG. 5 is a vertical cross-sectional plan view. 1... Duct, ゛ 3... Air outlet, 5... Vertical louver (louver), 9... Guide surface

Claims (1)

[Claims] In an air conditioning wind direction adjustment device having a louver at the air outlet of a duct to change the wind direction from side to side, the guide has a curvature that narrows the duct air outlet and allows the tip of the louver to come into contact when the louver is rotated to change the wind direction. An air conditioning wind direction adjustment device characterized by having a surface.