JPH0452136Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an improvement of a defroster device for removing fog from the windshield of an automobile.

2. Description of the Related Art As is well known, defroster devices that blow conditioned air along the surface of the windshield of automobiles have been widely used to defog the windshield of automobiles. This system houses a duct-shaped defroster nozzle extending in the vehicle width direction inside the vehicle's instrument panel, and forms a slit-shaped air outlet along the lower edge of the front window glass on the top surface of the defroster nozzle. The lower center part is connected to an air conditioner, specifically a heater unit, to introduce air conditioned air, and in order to reliably remove fog from the entire front window glass, it spreads across the width of the vehicle. The shape of the defroster nozzle is determined so that the airflow flows as evenly as possible from each part of the air outlet. Incidentally, normally, side defroster air outlets are also provided on both sides of the defroster nozzle, which are directed toward the side window glass.
(For example, see "Service Bulletin No. 517" published by Nissan Motor Co., Ltd. in October 1980.) Problems that the invention aims to solve The provided system is capable of supplying sufficient warm air to the top of the front window glass and the rear of the side window glass when the total air volume from the defroster is relatively small, for example when air is distributed to both the defroster and the footwells. Can not. Especially when the windshield is cold, such as in the winter, the wind blowing out cools down before it reaches the top, and if the flow velocity of the windshield is low, it is likely to peel off from the glass surface due to the influence of the ventilation flow in the passenger compartment. It takes a considerable amount of time for the fog on the top of the glass to be removed. There may also be areas where the weather is not clear.
That is, there was a drawback that the defroster's start-up performance and its ability to maintain clear conditions during driving were poor.

Means for Solving the Problems In order to solve the above problems, this invention provides a wind direction control device in the defroster nozzle that centrally guides the conditioned air from the air conditioner to a part of the outlet. It is characterized by In other words, this idea is
In the defroster device for an automobile, the defroster device has a defroster nozzle having an elongated air outlet formed in the vehicle width direction along the lower edge of the front window glass, and the lower part of the defroster nozzle is connected to the air outlet of the air conditioner. The defroster nozzle is formed in a shape that widens in the vehicle width direction as it goes toward the tip outlet, and approximately the entire amount of the conditioned air from the air conditioner is distributed within the defroster nozzle or between the defroster nozzle and the outlet. It is characterized by the provision of a wind direction control device that switches between a state in which the air is deflected left and right from the discharge port and a state in which the flow path area is narrowed down compared to the cross-sectional area of the discharge port and converged at the center in the vehicle width direction.

Function The air-conditioned air whose flow path area is narrowed by the wind direction control device is strongly blown out from the outlet at the center in the width direction of the vehicle. Therefore, even if the total air volume of the defroster is small, a strong blowout flow that can sufficiently reach the upper part of the windshield is ensured. Also, by deflecting it left and right, you can remove fog in the intended area.

Embodiment FIG. 1 is a perspective view schematically showing the overall configuration of a defroster device according to the invention, in which a defroster nozzle 1 is formed in a duct shape extending in the vehicle width direction, and is installed in an instrument panel 2. The inlet part 3 opened at the center of the lower part of the air conditioner is connected to the air outlet 2 on the top surface of the heater unit 4 of the air conditioner.
8 is connected. Further, on the upper surface of the defroster nozzle 1, there is a slit-shaped air outlet 6, which is elongated in the vehicle width direction along the lower edge of the front window glass 5.
7 and 8 are formed, and side defroster air outlets 10 and 11 are formed in the side portions toward the side window glass 9. The defroster nozzle 1 is formed in a shape that widens in the vehicle width direction toward the air outlet ports 6, 7, and 8. A wind direction control device 12 as shown in FIG. 2 is disposed at the inlet portion 3 of the defroster nozzle 1.

This wind direction control device 12 includes a pair of magnetic discs 13 and 14 having the same diameter and having gear parts 15 and 16 meshing with each other on their outer peripheries, and a non-magnetic magnetic disc rotatably supported on the axis of each magnetic disc 13 and 14. It is equipped with rectangular wind direction plates 17 and 18 consisting of bodies and a drive motor 19 that rotationally drives one of the magnetic plates 13 and 14, and an angle range of approximately 270° is provided on the surface of each magnetic plate 13 and 14. Electromagnets 20 and 21 are buried therein, and magnetic bodies 22 and 23 are attached to one end of the wind direction plates 17 and 18 in opposition to the electromagnets 20 and 21, respectively. The wind direction plates 17 and 18 are arranged inside the inlet part 3 of the defroster nozzle 1 together with the magnetic discs 13 and 14, and each wind direction plate is arranged so that the upper ends of each side are kept expanded outward during normal operation. Coil springs 24 and 25 are stretched over 17 and 18. still,
When the wind direction plates 17, 18 rotate against the coil springs 24, 25, a stopper 26 is provided opposite to the lower part of each wind direction plate 17, 18 so as to restrict the rotation angle within a predetermined range. , 27 are provided.

FIG. 3 is an explanatory diagram showing the operation of the wind direction control device 12, and shows the positions of the wind direction plates 17, 18 on the magnetic plates 13, 14, the directions of the wind direction plates 17, 18 in the defroster nozzle 1, The resulting fogging of the windshield 5 is shown in comparison with the three cases. First, the state shows a normal state in which the drive motor 19 is not operated, and at this time, the wind direction plates 17 and 18 maintain an inverted V-shape due to the urging force of the coil springs 24 and 25. Therefore, the conditioned air is equally distributed to each outlet 6, 7, and 8, and a substantially uniform outlet flow is obtained at each part. Therefore, there is no problem when the total air volume on the defroster side is large, but when the total air volume is small, a portion where the defroster effect is weak will occur as shown by diagonal lines at the top of the windshield 5. From this state, when the drive motor 19 is operated and the electromagnets 20 and 21 are energized, the magnetic bodies 22 and 23 are attracted in the angular range where the electromagnets 20 and 21 are buried, and the wind direction plates 17 and 18 are , 14. Therefore, for example, as shown in FIG.
Rotate until it touches 7. As a result, the conditioned air is mainly guided to the right side outlet 8 and the side defroster outlet 11, and is strongly blown out from there. On the other hand, at approximately the same time that the wind direction plate 18 comes into contact with the stopper 27, the magnetic body 22 of the wind direction plate 17 and the electromagnet 20
Since the wind direction plate 17 overlaps with the coil spring 24, the wind direction plate 17 rotates against the coil spring 24, but the wind direction plate 18
is maintained at the same position, so both wind direction plates 17 and 18 eventually assume a V-shape as in the state shown in FIG.
Therefore, the flow path area of the conditioned air is narrower than the cross-sectional area of the discharge port 28, and the conditioned air is ejected strongly mainly from the central blow-off port 7. Thereby, the central part of the front window glass 5 in the vehicle width direction can be quickly defogged up to the upper part. When the magnet disk 14 further rotates from this state, the electromagnet 21 moves away from the magnetic body 23, so that the wind direction plate 18 is returned to its initial position by the biasing force of the coil spring 25. Therefore, the conditioned air mainly flows through the left outlet 6 and the side defroster outlet 10.
It erupts strongly. When the magnetic disk 14 further rotates from this state, it is attracted again by the electromagnet 21 and the wind direction plate 18 rotates together with the magnetic disk 14.
As shown in the figure, both wind direction plates 17 and 18
becomes a V-shape. If the magnet disks 13 and 14 further rotate, the state shown in FIG. in short,
Due to the action of the drive motor 19, the state-to-state is repeated, and the concentrated and strong jet stream reciprocates from side to side. Therefore, the fog can be quickly removed from the upper part of the front window glass 5 and the rear part of the side window glass 9.

Note that, for example, by maintaining the state, only the driver's seat side may be preferentially de-fogged.

Next, in the embodiment shown in FIG. 4, a wind direction control device 31 using a fluid element is disposed at the inlet portion 3 of the defroster nozzle 1. The side walls 33 and 34 are formed into a flat shape, and control ports 35 and 36 are opened on both sides of the proximal end thereof, and the control flow flowing into each control port 35 and 36 is turned on by solenoid valves 37 and 38. , it is configured to be controlled in an OFF manner. Therefore, as shown in the figure, when the control flow is injected from the left control port 35, the main flow of the conditioned air flowing out from the main passage section 32 is deflected to the right, and mainly flows into the right side outlet 8 and the side defroster outlet 11.
erupts from. Conversely, if the control flow is injected from the right control port 36, the main flow will be deflected to the left, and if both control flows are blocked, the main flow will proceed straight. Note that a fixed wind direction plate 39 is provided in the defroster nozzle 1 in order to distribute air approximately equally to each of the air outlets 6, 7, and 8 when the main flow moves straight in this manner. In addition, when the main stream moves straight, the flow path area is narrower than the cross-sectional area of the discharge port 40, so the front window glass 5
The fog is quickly removed from the center of the vehicle widthwise up to the top.

Next, FIG. 5 and FIG. 6 show the wind direction control device 41.
This shows yet another embodiment of the above, in which a disk-shaped air deflector 44 is attached at an angle to a shaft 43 directly connected to a drive motor 42, and a pair of these are disposed at the inlet 3 of the defroster nozzle 1. In other words, by controlling the rotation angle of both shafts 43, the conditioned air can be guided in any direction. In this embodiment, too, the left and right air deflectors 44 can be shaped like a V to blow out strong air toward the center.

In addition, as shown in FIG. 7, the defroster nozzle 1
In the case of a defroster having two defroster nozzles 1, it is possible to provide a wind direction control device 12 in each defroster nozzle 1 so as to cause the conditioned air to be strongly blown out from a part of the outlet.

Effects of the invention As is clear from the above explanation, according to the automobile defroster device according to this invention, it is possible to narrow down the flow path area and blow the conditioned air strongly concentrated in the center, so the total air volume is small. The fogging can be quickly removed from the upper part of the windshield even when the windshield is closed. In addition, the state in which the conditioned air is diffused across the entire width of the vehicle, the state in which the entire amount of air conditioned air is deflected to the left and right, and the state in which the flow path area is narrowed and strongly blown out to the center are compared to the cloudy state of the window glass and the total air volume. It can be selected as appropriate depending on the size of the cloud, and it becomes possible to quickly remove fogging in the intended area.
Moreover, since the defroster nozzle is shaped to widen in the vehicle width direction as it goes toward the tip outlet, the air-conditioned air can be spread evenly across the entire width of the front window glass, providing a wide field of view. I can do it. Therefore, ideal defroster performance can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of a defroster device according to this invention, Fig. 2 is a perspective view showing an embodiment of a wind direction control device, and Fig. 3 is an explanatory diagram illustrating the operation of this wind direction control device. , FIG. 4 is a sectional view showing different embodiments of the wind direction control device, FIGS. 5 and 6 are sectional views and perspective views showing further different embodiments of the wind direction control device, and FIG. 7 is a diagram showing two defroster nozzles. FIG. 1... Defroster nozzle, 4... Heater unit, 5... Front window glass, 6, 7,
8... Air outlet, 10, 11... Side defroster air outlet, 12... Wind direction control device, 13, 14...
...Magnetic disc, 17, 18...Wind direction board, 20, 21...
...Electromagnet, 22,23...Magnetic material, 31...Wind direction control device, 35,36...Control port, 37,3
8... Solenoid valve, 41... Wind direction control device, 44...
Wind direction board.

Claims (1)

[Scope of utility model registration request] In the defroster device for an automobile, the defroster device has a defroster nozzle having an elongated air outlet formed in the vehicle width direction along the lower edge of the front window glass, and the lower part of the defroster nozzle is connected to the air outlet of the air conditioner. The defroster nozzle is formed in a shape that widens in the vehicle width direction as it goes toward the tip outlet, and inside the defroster nozzle or between the defroster nozzle and the outlet,
The wind direction is switched between a state in which substantially the entire volume of the conditioned air from the air conditioner is deflected left and right from the discharge port and guided, and a state in which the flow path area is narrowed down from the cross-sectional area of the discharge port and converged at the center in the vehicle width direction. A defroster device for an automobile, characterized in that it is equipped with a control device.