JPS6134893Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a ventilation system for automobiles.

Conventionally, ventilation mechanisms installed on the roof of the driver's cab in large vehicles such as trucks have had the following drawbacks.

First, because the opening end of the ventilator cover was parallel to the roof and relatively open without being curved downward at the front, raindrops mixed in with outside air during driving in the rain entered the driver's cabin through the outside air intake. easy.

Secondly, the airflow is relatively fast due to the vortices generated at the rear of the ventilator cover, and the pressure is lower than the rear of the water drain hole provided at the rear of the cover, so water droplets inside the cover do not drain out, and conversely, the airflow on the outside of the cover Raindrops that collect on the top are sucked into the cover.

Thirdly, raindrops adhering to the outer side surface of the cover flow into the driver's cabin from inside the cover along the side edge.

Fourthly, because the height of the periphery standing around the rear of the outside air intake hole drilled in the roof is low, water droplets that have accumulated around the periphery flow into the room from the intake hole.

Fifth, since the upper corner of the front of the driver's cab is curved in an arc, the air that hits this part escapes diagonally upward in the opposite direction to the direction of travel, making it difficult to flow into the ventilator cover. .

In view of this, the present invention eliminates the drawbacks of the conventional technology, accurately separates outside air and raindrops even when driving in the rain, and introduces a large amount of outside air without water droplets into the passenger compartment. This is a design with a purpose.

In the present invention, the cover 3 is
A front inclined part 3d is formed by curving the tip part diagonally downward, and an outside air intake port 2 is opened in the front inclined part 3d. A plurality of attachment bosses 1 are installed vertically at predetermined locations around the lower edge 3a of the cover 3.
7 is provided, and a packing 17a is interposed on the lower surface of the attachment boss 17, and a cover is placed on the roof panel 5 with a small gap 4 between the entire circumference of the lower edge 3a and the surface of the roof panel 5. At the same time, a ventilator 16 having a lid 15 that can be opened and closed at the upper part and having a height sufficient to prevent water droplets from entering is installed at the rear of the ventilator plate 9 so as to communicate with the passenger compartment 1a. It is something.

An example of the implementation of the present invention will be described with reference to the drawings. 3 has a front end curved obliquely downward in the direction of movement of the vehicle body 1 to form a front inclined part 3d, and an outside air intake port below the front inclined part 3d. A plurality of attachment bosses 17 are provided at predetermined locations around the lower edge 3a of the cover 3, and a packing 17a is interposed on the lower surface of the attachment boss 17 so that the lower edge 3a is opened.
A gap 4 is provided between the entire circumference of the ridge a and the roof panel 5, and a nut 18a is attached to the bolt 18 inserted through the mounting boss 17, the packing 17a, and the roof panel 5.
are screwed together to fix the cover 3 onto the roof panel 5. There is a partition wall 6 in the front and back direction in the center of the inside of the cover 3.
is vertically provided, and the rear part of the partition wall 6 is curved radially in an arc shape in the left-right direction to form a partition drain part 6a, thereby dividing the inside of the cover 3 into two and forming a ventilation part 7 symmetrically. Inside each ventilation section 7, there is a partition wall 6 and a cover 3.
The inflow passages 8, 8 are left between the side wall 3b of
The cover 3 is attached to the roof panel 5 by leaving a gap 4 between the V-shaped ventilate plate 9 on which the holes 9a and 9a are formed.
be installed vertically. Along the periphery of the constricted parts 9a, 9a, front drain plates 11, 11, which are short on the outer surface side of the constricted part 9a and slightly longer on the inner side, are arranged to face the constricted parts 9a, 9a, leaving narrow passages 10, 10. It is installed vertically on the cover 3 in a symmetrical position and in a curved direction, and the lower edge 11a is brought into close contact with the roof panel 5 via a drain plate seal 11b. Reference numeral 12 denotes a rear drain plate which is vertically disposed from the cover 3 in a symmetrical position and curved direction with respect to the bulkhead drain portion 6a, and a discharge passage 19 is provided between the bulkhead drain portion 6a and the tips 6c and 12b of the rear drain plate 12. Form. 14 is a V with the tip 14a facing the outside air intake port 2
The left and right rear parts 14c, 14c are vertically disposed on the cover 3, leaving an outflow gap 13 between the partition wall draining part 6a and the rear draining plate 12, which are located in front of the discharge path 19. Wind guide plate 14 and front drain plate 11,
11, a ventilator 16 is installed between the roof panel 5 and the roof panel 5, which communicates with the inside of the vehicle compartment 1a and has a height sufficient to prevent raindrops entering the outflow hole 16b.
and the air intake hole 1 above the ventilator 16.
A lid 15 that can be manually operated from inside the passenger compartment 1a toward the rear of the vehicle body is attached to the lid 6a so as to be openable and closable.

In addition, bulkhead 6, ventilate plate 9, front drain plate 1
1. The rear drain plate 12 and the air guide plate 14 are integrally formed with the synthetic resin cover 3 by injection molding.

Since the present invention is configured as described above, the outside air that hits the front of the vehicle body while driving is directed to the front inclined portion 3d of the cover 3.
At this point, the air is reversed and flows obliquely upward to create a negative pressure, so that the portion of the outside air intake port 2 below the front inclined portion 3d becomes under positive pressure and a sufficient amount of outside air flows therein. When the flow of outside air and raindrops is viewed from a plane, the outside air flowing in from the outside air intake port 2 of the cover 3 while driving is divided into left and right by the partition wall 6 as shown by the arrow in FIG. 7, hits the ventilator plate 9 and is further divided into left and right sides, passes straight through the left and right inflow channels 8, 8 together with some of the outside air, and curves toward the ventilator 16 side.The bulkhead drain section 6a and the rear drain plate. 12, the direction of the wind is turned to the side of the air guide plate 14, and the air is further guided by the air guide plate 14, advances to the intake hole 16a of the ventilator 16, and is supplied from above into the passenger compartment 1a via the outlet hole 16b. When traveling at high speed and a large amount of outside air flows in from the outside air intake port 2, or when the lid 15 of the ventilator 16 is closed, the outside air that cannot flow into the ventilator 16 is collected all around the lower edge 3a of the side wall 3b of the cover 3. It is discharged to the outside through the gap 4 between the and roof panel 5.

While driving in rainy weather, raindrops enter from the outside air intake port 2 together with the outside air, but as shown by the dotted chain line, the raindrops enter the ventilation section 7.
The raindrops that entered from positions C, D, and H near the center of the ventilation part 7 travel in a straight line, and then, together with the raindrops that entered from the position D of the center of the ventilation part 7, first hit the tip 9c of the ventilate plate 9 and are divided into left and right sides. At the same time, most of the raindrops adhere to the left and right outer surfaces of the ventilate plate 9 and flow down, and the raindrops fall onto the surface of the roof panel 5 and flow into the gap provided between the lower edge 3a of the cover 3 and the entire circumference of the ridge. 4 to the outside, and the other part flows along the outer surface or remains attached to the back surface of the constricted portions 9a and 9a due to the acceleration force, but the outside air passes along the surface side of the constricted portion 9a along with the raindrops. Therefore, the pressure on the front surface of the throttle part 9a is lower than that on the back surface, creating a pressure difference, and there is a gap 4 between the lower edge 9b of the ventilate plate 9 and the roof panel 5, and the lower edge of the front drainage plate 11. 11a is brought into close contact with the roof panel 5 by the draining plate seal 11b, and raindrops are sucked out to the surface side.
It merges with the raindrops that entered from position Ha. There is a gap 4 between the entire circumference of the lower edge 3a of the cover 3 and the roof panel 5, and since the outside air passes through the outside of the cover 3 at a higher speed than the inside, the pressure is lower. That is, the outside air pressure on the outer wall surface of the side wall 3b is lower than that on the inner wall surface, creating a pressure difference, so that raindrops flow out of the cover 3 in a sucked state. Ventilation part 7 along with outside air from position A closest to side wall 3b.
The raindrops that have entered are attached to the inner wall surface of the side wall 3b, hang down, fall onto the roof panel 5, and flow out through the flow gap 4. In addition, raindrops that enter from a position close to the partition wall 6 attach to one side of the partition wall 6 and hang down, flow on the surface of the roof panel 5, and flow out of the cover 3 through the gap 4 at the rear periphery of the cover 3. do. Raindrops that enter from the positions B and N inside the ventilation section 7 along with the outside air from the position A go straight ahead and pass through the inlet channel 8 to the partition wall drain section 6a and the rear drain plate 12.
A part of the roof panel 5 adheres to the roof panel 5 and hangs down.
The flow flows out over the roof panel 5 from the gap 4 between the roof panel 5 and the outside, and the other part flows along the curved surface while adhering to the inner surface due to acceleration force, and flows into the discharge path 19 and behind the cover 3. It flows out from the gap 4 between the wall 3c and the roof panel 5. The outside air from which raindrops have been removed in this way further enters the ventilation section 7 due to inertia, is guided to the air guide plate 14, and is guided to the ventilator 16.
The air enters the air intake hole 16a.

Looking at the flow of raindrops from the side, the outside air intake 2 has advanced from the positions H and G in the parallel direction and the position H in the horizontal direction along the windshield and front outer surface of the vehicle body 1, as shown in Fig. 7. Raindrops enter from the outside air intake port 2 along with the outside air, travel along the inner surface of the cover 3, hit the top surface 3e of the cover 3, and are pushed backward by the inflowing outside air. 9, and its progress is blocked, and part of it hangs down along the surface of the tip 9c and middle part 9d of the ventilate plate 9 and falls onto the roof panel 5, while the other part continues to descend due to the load. At the constriction part 9a, which is blocked by the front drain plate 11, raindrops adhering to the surface hang down as they are in the same way as described above, and raindrops that have gone around the back surface are blocked by the front drain plate 11. Due to the pressure difference at the ventilator 9a, water is sucked out to the surface side of the ventilator plate 9, flows over the roof panel 5, and flows out to the outside, and a small amount of water droplets that have accumulated on the rear outer lower end of the ventilator 16 are also sucked out onto the roof panel 5. Only the outside air from which raindrops have been removed flows out through the gap 4 through the air guide plate 1.
4 to the air intake hole 16a of the ventilator 16.
is supplied into the vehicle compartment 1a.

The driver then opens and closes the lid 15 or adjusts the inclination angle of the opening to adjust the amount of outside air flowing into the vehicle interior.

Therefore, according to the present invention, the tip of the cover is curved diagonally downward to form the front inclined part, so that while the vehicle is running, the outside air hits the front inclined part and reverses and flows diagonally upward. On the other hand, the pressure is negative, but the pressure near the outside air intake below the front inclined portion is positive, so that the outside air can flow in sufficiently at the outside air intake. While driving, the outside air passes through the ventilation section, hits the V-shaped ventilator plate, splits into left and right, goes around the rear of the ventilator plate, is guided to the intake hole of the ventilator, and is supplied into the passenger compartment. Fresh air and wind are pumped into the cabin to keep it comfortable. Particularly when driving in rainy weather, the raindrops hit the outside air mixed with raindrops and are separated into left and right sides. At the same time, the raindrops hit the ventilate plate and hang down, forming a drainage hole between the cover and the roof panel around the entire lower edge of the cover. However, while the outside airflow flowing over the roof panel around the outer circumference of the cover is fast, the airflow inside the cover is slow, creating a pressure difference between the inside and outside of the cover. In addition, even if water droplets are collected at the bottom corner of the rear outside of the ventilator, the height of the ventilator is high enough to prevent the inflow of water droplets. The dripping raindrops fall onto the roof panel and flow to the outside through the gap between the roof panel and the lower edge of the cover. The gap provided in order to drain raindrops that have passed down through the ventilate plate is not limited to a specific location, but is distributed over the entire lower edge of the cover. Drainage efficiency is extremely high because water can flow out from the entire circumference of the lower edge of the cover, which is installed between the cover and the roof panel.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a plan view of the device, Fig. 2 is a side view of the device, Fig. 3 is a sectional view taken along line AA in Fig. 1, and Fig. 4 is a cross-sectional view of the device. Figure 1 is a cross-sectional view taken along line BB in Figure 1, Figure 5 is a cross-sectional view taken along line CC in Figure 1, and Figure 6 is an explanatory diagram showing the flow of outside air and raindrops observed from a plane inside the cover on one side of this mechanism. , FIG. 7 is an explanatory diagram showing the flow of outside air and raindrops observed from the side of the device. Code: 1... Vehicle body, 1a... Vehicle interior, 2... Outside air intake, 3... Cover, 3a... Lower edge, 3b...
Side wall, 3c...Rear wall, 3d...Front slope, 3e
...Top surface, 4...Gap, 5...Roof panel, 6
... Bulkhead, 6a... Bulkhead drainage part, 6b... Lower edge,
6c... Tip, 7... Ventilation section, 8... Inflow path, 9
...Benture plate, 9a...Aperture part, 9b...
Lower edge, 9c... Tip, 9d... Middle part, 10...
Narrow path, 11...Front drain plate, 11a...Lower edge, 1
1b... Drain plate seal, 12... Rear drain plate, 1
2a... lower edge, 12b... tip, 13... outflow gap, 14... wind guide plate, 14a... tip, 14b...
...lower edge, 14c...rear, 15...lid, 16...
Ventilator, 16a...Intake hole, 16b...
Outflow hole, 17... Mounting boss, 17a... Packing, 18... Bolt, 18a... Nut, 19
...Emission path, I~Nu...Raindrop entry position.

Claims (1)

[Scope of utility model registration request] The front end of the cover 3 is bent diagonally downward in the direction of movement of the vehicle body 1 to form a front inclined part 3d, and an outside air intake port 2 is opened in the front inclined part 3d, on the side opposite to the outside air intake port 2. An open V-shaped ventilate plate 9 is vertically provided, and a plurality of attachment bosses 17 are provided at predetermined locations around the lower edge 3a of the cover 3,
A packing 17a is interposed on the lower surface of the attachment boss 17, and a cover 3 is provided on the roof panel 5 with a small gap 4 between the entire circumference of the lower edge 3a and the surface of the roof panel 5. , At the rear of the ventilate plate 9, there is a lid 15 on the top that can be opened and closed.
1. A ventilation system for an automobile, characterized in that a ventilator 16 having a sufficient height to prevent water droplets from entering is installed in communication with a passenger compartment 1a.