JPS6144700B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilation system for ventilating the interior of an automobile.

In general, in this type of automobile ventilation system, when outside air is introduced into the passenger compartment, the outside air is introduced as natural wind (traveling wind) from the driving of the car, or as forced air by the fan of the air conditioning unit. However, the former natural wind introduction method has the disadvantage that outside air is not introduced when the car is stopped, and the latter forced air introduction method, on the other hand, has the disadvantage that outside air is not introduced when the car is stopped. However, the drawback is that it is difficult to introduce outside air unless the fan is activated.

For this reason, conventional automobile ventilation systems that take advantage of the advantages of both of the above-mentioned introduction methods have been designed to connect a first air passage that introduces natural wind from driving and a second air passage that introduces forced air from a fan. It has been proposed that a switching valve is provided at the connection part of the air path to switch between natural wind and forced wind depending on whether the vehicle is running or stopped.

However, in the above proposal, if the natural wind and forced wind introduced into the passenger compartment are distributed and blown not only to the chest area of the passenger but also to the feet of the occupant, there is a limit to the amount of air introduced by each wind. There is a problem in that the air volume leading to the above decreases, making it impossible to achieve a good ventilation function, and this problem is particularly noticeable when natural air is introduced.

Therefore, in view of this, the present invention branches a first air passage that guides natural wind to open at the chest and feet of the occupant, respectively, and directs the natural wind to the chest area of the occupant at the branched portion of the first air passage. On the other hand, the second air passage for introducing forced air is connected to the chest ventilation side of the occupant downstream of the branching part of the first air passage. The switching mode allows natural wind to pass through the occupant's feet, maximizing the airflow to the feet, while forcing air to flow to the chest area, allowing the airflow to be adjusted to the driver's chest while the vehicle is running or when the vehicle is stopped. To provide a ventilation system for an automobile which can always maintain a constant level regardless of the time and can exhibit a comfortable ventilation function.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

In FIGS. 1 to 5, reference numeral 1 denotes an instrument panel constituting the front part of the interior of an automobile, and the panel 1 is formed with a chest ventilation opening 2 that opens toward the chest of an occupant. The opening 2 has a wind direction control fin 3 for controlling the direction of ventilation.
3,3 is attached.

Reference numeral 4 denotes a first duct constituting a first air passage 5 that guides natural wind (driving wind) introduced from, for example, the cowl part when the automobile is running, and the first duct 4 is connected to the first duct 4 through a sealing member 6. An upper branch path 7b branches from the upstream end branch 7a and extends toward the front (rear side).
A branch duct 7 having a lower branch passage 7c extending downwardly is connected to the branch duct 7, and the first air passage 5 is connected to the upper branch passage 7b and the lower branch passage 7c via the branch part 7a.
The upper branch path 7b is connected to the chest ventilation port 2, and the lower branch path 7c is connected to a foot ventilation port 8 that opens toward the feet of the occupant.

Also, one end of 9 is an air conditioning unit (not shown).
A second duct 9 is connected to a second air passage 10 for guiding forced air introduced by a fan in the air conditioning unit, and the other end of the second duct 9 is connected to a branch part of the branch duct 7. 7a and the chest ventilation opening 8, the second air passage 10 is connected to the branching part 7a of the first air passage 5 and the chest ventilation opening 2.
It is configured to connect between

Furthermore, a switching valve 11 is disposed at the branching portion 7a of the first air passage 5 to switch the natural wind between ventilation to the chest ventilation opening 2 and ventilation to the foot ventilation opening 8. That is, the switching valve 11 is connected to the first air path 5.
The first valve shaft 11a is fixed to a first valve shaft 11a that is rotatably and horizontally supported on the outer wall (branch duct 7) at the approximate center of the branch section 7a, and one end of the first valve shaft 11a is located outside the outer wall of the branch section 7a. An arm member 12 having an engaging pin 12a at its tip is attached to the protruding portion, and the engaging pin 12 of the arm member 12 is attached to the protruding portion.
a is movably engaged in an elongated hole 13a formed in the tip of an operating lever 13 rotatably supported on the outer wall of the upper branch path 7b, and is configured to operate the rear end of the operating lever 13. The portion 13b protrudes into the vehicle interior from the side of the chest ventilation opening 2 of the instrument panel 1, and when the operating lever 13 is swung, the switching valve 11 is opened by the arm member 12 and the first valve shaft 11a. In the A mode position shown in FIG. 3, the first air passage 5 is blocked, and in the B mode position shown in FIG. 4, the first air passage 5 is communicated with the foot ventilation opening 8. Further, in the C mode position shown in FIG. 5, the first air passage 5 is configured to communicate with the chest ventilation opening 2.

Further, the upper branch path 7b of the first air path 5 and the second
An on-off valve 14 that opens and closes both the air passages 5 and 10 oppositely is disposed at the connecting portion 7d with the air passage 10. That is, the on-off valve 14 has a second valve shaft 14 horizontally and rotatably supported on the outer wall of the upper branch passage 7b at a position closer to this side than the first valve shaft 11a.
It is fixed at a. And the second valve shaft 14a
A substantially L-shaped engagement arm member 15 extending in a direction substantially opposite to the on-off valve 14 is attached to the switch valve 14 , and the distal end of the engagement arm member 15 is a clamping portion of a protrusion 16 fixed to the switching valve 11 . 16a, and when the switching valve 11 is in the C mode position shown in FIG. The distal end portion of the arm member 15 engages with the distal end portion of the engaging arm member 15, and the distal end portion of the engaging arm member 15 is clamped by the clamping portion 16a of the projection piece 16, and the on-off valve 14 integrated with the engaging arm member 15 is rotated in conjunction with the distal end portion of the engaging arm member 15. and closes the second air passage 10 by rotating the on-off valve 14, while in the A and B mode positions shown in FIGS. 3 and 4, the protrusion 16 of the switching valve 11 and the engagement arm member 15, the engagement between the two is disengaged, and the opening/closing valve 1 is released.
4 to open the second air passage 10.

In addition, as shown in FIG.
The first arm member 1 is attached to the first valve shaft 11a that supports the
7 is a second valve shaft 14a that also supports the on-off valve 14.
A second arm member 18, which is longer than the first arm member 17, is attached at a corresponding position, and each end of a torsion spring 19 is rotatably engaged between the distal ends of both arm members 17 and 18. The torsion spring 19 is connected to the switching valve 11 and the on-off valve 14.
is in the A mode position, the length becomes shorter than the free length, and due to the stretching force, both arm members 1
7, 18 to rotate both valves 11, 14 in opposite directions, while at the free length when both valves 11, 14 are in the B and C mode positions,
It is provided so that the spring force disappears.
Note that 20 and 20 are stoppers for restricting the rotation of the switching valve 11 to the A mode position, and 21 is a stopper for restricting the rotation of the on-off valve 14 to the open position where the second air passage 10 is opened.

Next, the operation of the above embodiment will be explained.
First, when the operating portion 13b of the operating lever 13 is moved to the upper end position and switched to the A mode position, the elongated hole 13a at the tip of the operating lever 13 engages with the engagement pin 12a of the arm member 12. As a result, the arm member 12 is rotated to the lower end position, and the switching valve 11 integrated with the arm member 12 is rotated to the position regulated by the stoppers 20, 20 as shown in FIG. 5, while this switching valve 11
an on-off valve 14 connected to via a first arm member 17, a torsion spring 19 and a second arm member 18;
As shown by the solid line in FIG. 6, a spring force in the stretching direction is generated in the torsion spring 19 due to the length between its both ends being shorter than its free length. biased in a counterclockwise direction,
The upper branch passage 7b of the first air passage 5 is closed and the second air passage 1 is closed.
It is held open to 0. As a result, the natural wind in the first air duct 5 introduced by the running of the car is not introduced into the passenger compartment, and the forced wind introduced by the fan of the air conditioning unit is blocked by the opening/closing valve 14, which prevents the forced wind from being introduced into the passenger compartment. Instead of reaching the opening 8, the air is vented from the chest ventilation opening 2 toward the chest of the occupant, as shown by the solid line arrow in FIG.

At this time, the switching valve 11 and the on-off valve 14 are rotationally biased relative to each other by the spring force in the extension direction of the torsion spring 19. The pressing force is increased and the sealing performance can be improved.

Further, when the operating portion 13b of the operating lever 13 is moved to the center position to switch to the B mode position, the arm member 12 is guided by the operating lever 13 and rotates to the center position, thereby causing the switching valve 1
1 is rotated to the position shown in FIG. 4 to communicate the first air passage 5 with the foot ventilation opening 8. On the other hand, this switching valve 11
As the switching valve 11 rotates, the length between both ends of the torsion spring 19 becomes a free length as shown by the broken line in FIG. Therefore, the second air passage 10 is maintained in an open state. As a result, while the entire amount of natural wind is ventilated toward the occupant's feet from the foot ventilation opening 8 via the lower branch path 7c of the first air passage 5, as shown by the broken line arrow in FIG. Similarly, as shown by the solid arrow, the air is ventilated from the chest ventilation opening 2 toward the chest of the passenger.

Therefore, while ensuring a sufficient amount of air to the occupant's feet with the full amount of natural air, the amount of air to the chest area can be increased by forced air, and the ventilation function can be enhanced. In addition, since the above-mentioned ventilation is performed in this B mode position, during cooling, natural air (outside air) with a higher temperature than the cold air ventilated from the air conditioning unit to the chest area of the passenger is It is possible to ventilate the air, thereby eliminating the discomfort caused by being too cold and giving the occupants a comfortable feeling due to a cold head and warm feet.

Further, when the operating portion 13b of the operating lever 13 is moved to the lower end position and switched to the C mode position, the arm member 12 is rotated to the upper end position, and the switching valve 11 is accordingly moved as shown in FIG. The first air passage 5 is made to communicate with the chest ventilation opening 2 by rotating to a substantially horizontal position. Further, as the switching valve 11 rotates, the clamping portion 16a of the protruding piece 16 moves while clamping the tip of the engagement arm member 15 that is integrated with the on-off valve 14. 11 to close the second air passage 10. As a result, natural wind flows through the second air path 1 due to the shutoff action of the on-off valve 14.
As shown by the broken line arrow in FIG. 5, the air is vented from the chest ventilation opening 2 toward the chest of the occupant via the upper branch path 7b of the first air path 5, without reaching zero, as shown by the broken line arrow in FIG. Not done.

When switching to the C mode position, the length of both ends of the torsion spring 19 is a free length, as shown by the dashed line in FIG. 6, so the switching operation can be performed with a small operating force. It is possible to improve operability.

Furthermore, in the above embodiment, both the valves 11 and 14 are interlocked by the engagement between the clamping portion 16a of the protruding piece 16 of the switching valve 11 and the distal end portion of the engagement arm member 15 of the on-off valve 14. An interlocking mechanism is provided, and since the interlocking mechanism is disposed within the branch duct 7 and is not visible from the outside, it has the advantage of a simple structure and a good external appearance.

As explained above, according to the present invention, the first air path that guides the natural wind introduced during driving is branched, and the chest ventilation opening opens toward the chest of the occupant and the foot ventilation opening opens toward the feet. connects to the mouth,
A switching valve is provided at the branching part of the first air path to switch the natural wind between the chest ventilation hole and the foot ventilation hole, while a second air path is provided to guide the forced air introduced by the fan. By connecting between the branch of the first air path and the chest ventilation opening, the amount of ventilation to the occupant's feet is ensured by the full amount of natural air while driving, while forcing the amount of ventilation to the chest. Since the total amount of air can be ensured at all times regardless of whether the vehicle is running or stopped, it is possible to effectively utilize natural wind and forced wind to enhance the ventilation function of automobiles, which in turn increases the sense of comfort for passengers. It is something that can be achieved.

In addition, if an on-off valve is provided at the connection between the first air path and the second air path to open and close both air paths inversely, both air paths can be reliably shut off when not in use, and ventilation can be improved. This has the advantage of further improving functionality.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIGS. FIG. 1 is a cross-sectional view taken along the line 10-1 showing the position, and FIG. 6 is an explanatory diagram of the operation of the stop mechanism for both valves. 2...Chest ventilation opening, 5...First air passage, 7a...
Branch part, 8... foot ventilation opening, 10... second air path,
11...Switching valve, 13...Operation lever, 14...
Opening/closing valve, 15... Engagement arm member, 16... Projection piece, 17... First arm member, 18... Second arm member, 19... Torsion spring.

Claims (1)

[Scope of Claims] 1. A first air passage that guides natural wind introduced during driving is branched and connected to a chest ventilation opening that opens toward the chest of the occupant and a foot ventilation opening that opens toward the feet of the occupant. A switching valve is provided at the branching part of the first air passage to switch the natural wind between the chest ventilation hole and the foot ventilation hole, while a second airflow is provided to guide the forced air introduced by the fan. A ventilating system for an automobile, characterized in that a ventilator is connected between a branch of the first air channel and a chest vent. 2. The ventilation system for a motor vehicle according to claim 1, further comprising an on-off valve that opens and closes the first air passage and the second air passage oppositely at a connecting portion between the first air passage and the second air passage.