JPH0728969Y2 - Ventilation device for vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an improvement of a ventilation device in a vehicle air conditioner.

<Prior Art> As a conventional ventilation device for a vehicle air conditioner, Japanese Patent Application No. 61-161257 (Japanese Utility Model Publication No. 63-6630) is available.
Japanese Patent Publication No. 9)).

As shown in FIG. 5, this conventional ventilation device is provided separately from a rear heater duct 2 extending from an air conditioning unit 1 from a lower portion of a ventilation three-way duct 3 to a rear cooler duct. 4 is extended, and the air outlet 5 of the duct 4 is opened from between the seat 6 between the driver's seat and the passenger seat toward the rear seat, and a shut damper 7 is provided at the air outlet 5. is there.

In this conventional ventilation device, the rear cooler duct 4 that opens toward the rear seat is separated from the rear heater duct 2 and extends from the lower part of the ventilation three-way duct 3. Rear cooler duct 4
Only the cool air can be blown out from the air outlet 5 of the rear heater, and only the warm air can be blown out from the air outlet 8 of the rear heater duct 2 to the feet. Can be easily realized.

<Problems to be Solved by the Invention> By the way, in the conventional ventilation device, when the side windshield of the vehicle is to be controlled by defrosting, the mode damper 9 is used.
Is slightly opened to let warm air pass through the three-way duct 3, the center ventilation mode damper 10 is closed, and the warm air is sent to the side ventilation duct 11.

However, in this case, since the shut damper 7 of the rear cooler duct 4 is designed to be opened and closed by manual operation, the shut damper 7 may not be completely closed.

If the shut damper 7 is not completely closed, warm air will leak toward the rear seats. This warm air hits the face of the passenger in the rear seat and is not desirable.

<Means for Solving the Problems> As means for solving the above problems, according to the present invention, a bench for blowing air to a center ventilation and a side ventilation that is opened and closed by a mode switching damper installed in an upstream portion. A rear cooler duct for blowing air to the head of the rear seat occupant is further connected to the three-way duct for ventilation, and a center ventilation mode damper is installed in the center ventilation opening of the three-way duct. In a ventilation device for a vehicle air conditioner, a rear cooler mode damper is installed in the rear cooler duct.The mode change damper is opened for the mode change damper, the center ventilation mode damper, and the rear cooler mode damper. Center ventilation mode damper and rear When the cooler mode damper is in the open state and the mode switching damper is closed or slightly open, the center ventilation mode damper and the rear cooler mode damper are linked by an interlocking mechanism that closes them. It is adopted.

<Operation> In the present invention, the mode switching damper, the center ventilation mode damper, and the rear cooler mode damper are interlocked and coupled through the interlocking mechanism, and when the mode switching damper is slightly open, the center ventilation mode damper is opened. Since the rear cooler mode damper and the rear cooler mode damper are closed, the center ventilation mode damper and the rear cooler mode damper are closed even if the mode changeover damper is slightly opened to prevent side clouding by side ventilation. Has become.

For this reason, even if the mode switching damper is slightly opened to allow warm air to enter the three-way duct, the warm air that has entered the three-way duct will be guided to the center ventilation opening of the three-way duct by the center ventilation mode damper. In addition to being prevented from entering, the rear cooler mode damper also prevents from entering into the rear cooler duct.

Therefore, in the present invention, even if the mode switching damper is slightly opened and the side windows are used for defrosting of the side windows, the warm air that has entered the three-way duct leaks to the rear seats through the rear cooler duct. There is no such thing.

<Embodiment> An embodiment of the present invention will be described with reference to FIGS.

The vehicle air conditioner has an air conditioning unit as shown in FIG.
The air conditioning unit 20 has a ventilation device 20 connected thereto as shown in FIGS. 1 to 3. Reference numeral 12 indicates a three-way duct in the apparatus, and the three-way duct 12 is located inside an instrument panel (not shown).

A mode switching damper 13 that opens and closes the three-way duct 12 is installed on the upstream side of the three-way duct 12, and a center ventilation duct 14 and two side benches are provided on the instrument panel side, which is the downstream side of the three-way duct 12. The ventilation duct 15 is connected. And, in the three-way duct 12,
Furthermore, the rear cooler duct 16 is also connected.

The center ventilation duct 14 is connected to the upper part of the three-way duct 12 and has a blow-out port at a location that opens inside the vehicle.
17 are formed.

The side ventilation ducts 15 extend in the left-right direction of the three-way duct 12 and open near the side windows (not shown).

The rear cooler duct 16 is connected to a fourth opening newly provided in the lower part of the three-way duct 12, and faces the rear seat along the floor and the console box (not shown) to connect the driver part and the passenger seat. Seat back for both seats 18
It rises in the middle and opens to the rear seat side. And the air outlet 19 is attached to the opening.

In addition, the defroster duct 21 is attached to the upper part of the air conditioning unit 20, and the rear heater duct 22 which is a part of the ventilation device is connected to the lower part of the defroster duct 21. It extends to the rear of the passenger compartment along the vehicle duct 16 and opens at the foot of the rear seat.

A center ventilation mode damper 23 is provided in the center ventilation opening of the three-way duct 12 to which the center ventilation duct 14 is connected, and the damper 23 is provided on the wall portion of the three-way duct 12. It is fixed to a pivot 29 that is movably supported.

A rear cooler mode damper 24 is disposed in the rear cooler duct 16, and the damper 24 is rotatably supported by a wall portion of the three-way duct 12 near a connection portion between the three-way duct 12 and the rear cooler duct 16. It is fixedly attached to the pivot 40.

In addition, a rear heater mode damper 25 is arranged in the rear heater duct 22, and the defroster duct 21 is a pivot shaft rotatably supported by a wall portion of the air conditioning unit 20.
It is adapted to be opened and closed by a mode switching damper 13 fixed to 26.

The mode switching damper 13 is interlocked with the center ventilation mode damper 23 through an interlocking mechanism composed of various links, as shown in FIGS.

That is, the pivot 26 to which the mode switching damper 13 is fixed
A lever 27 is fixed to the lever, and a pin is attached to the tip of the lever 27.
A lever 30 is fixed to a pivot 29 to which the center ventilation mode damper 23 is fixed, and a long hole 31 is provided in the center of the lever 30. The bell crank 32 is located between the levers 27 and 30.
Is fixedly arranged on a pivot 33 rotatably supported on the wall portion of the three-way duct 12. Further, a pin 34 is pivotally supported at one end of the bell crank 32, and a pin 36 is pivotally supported at the other end thereof.The pin 34 of the bell crank 32 is connected to the pin 28 of the lever 27 by a rod 35. The pin 36 of 32 is engaged with the long hole 31 of the lever 30.

Further, in the various links of the interlocking mechanism explained above, when the mode switching damper 13 opens the three-way duct 12 as shown in FIG. 2, the center ventilation mode damper 23 opens the center ventilation duct 14, and conversely, When the switching damper 13 closes the three-way duct 12, the center ventilation mode damper 23 becomes the center ventilation duct.
It is arranged to realize the action of closing 14.

By the way, the mode switching damper 13 may be in a slightly opened state as shown in FIG. This is the case when the side windows are pest-controlled.

In this case, since the long hole 31 of the lever 30 on the side of the center ventilation mode damper 23 is engaged with the pin 36 of the bell crank 32 with a predetermined clearance as shown in FIG. When the center ventilation mode damper 23 is rotated by the rotation of 32 from the open position shown by the solid line in FIG. 4 to the closed position shown by the chain double-dashed line in FIG. Upper side wall 31
The pin 36 and the elongated hole 31 of the lever 30 correspond to the lower peripheral surface of the pin 36 and the lower side wall 31B of the elongated hole 31B because the pin 36 and the elongated hole 31 of the lever 30 are stationary in the closed position. Between the side walls 31A and 31B on both upper and lower sides of the elongated hole 31 and the pin 36 shown in FIG.
Since there is a floating clearance corresponding to the sum of the two clearances and the center ventilation mode damper 23 is biased in the closing direction by a spring (not shown), the mode switching damper 13 If the opening is set so that the pin 36 stays within the floating clearance between the long hole 31 and the pin 36, the center ventilation mode damper 23 Keep closed.

As shown in FIGS. 2 and 3, the rear cooler mode damper 24 is a center ventilation mode damper.
It is connected to 23 via an interlocking mechanism.

That is, the lever 37 is fixed to the pivot 33 to which the bell crank 32 is fixed, and the pin 38 is pivotally supported at the tip of the lever 37. Then, in parallel with the lever 37, the other lever 39
However, the axle 40 to which the rear cooler mode damper 24 is fixed
The pin 41 is pivotally supported at the tip of the other lever 39, and the pin 41 and the pin 38 are connected by a rod 42.

Therefore, as shown in FIGS. 1 to 3,
When the center ventilation mode damper 23 opens and closes the center ventilation duct 14, in response to this,
The rear cooler mode damper 24 opens and closes the rear cooler duct 16. Even if the mode switching damper 13 is slightly opened as described above, the rear cooler mode damper 24 is
Since there is no floating clearance with the center ventilation mode damper 23, it is closed like the damper 23.

Since the mode switching damper 13, the center ventilation mode damper 23, and the rear cooler mode damper 24 are in the interlocking relationship as described above, in the cooler mode, the mode switching damper 13 is indicated by the chain line in FIG. 1 and the solid line in FIG. The three-way duct 12 is opened as shown, and cold air coming from an evaporator (not shown) is introduced into the three-way duct 12. At this time, the center ventilation mode damper 23 and the rear cooler mode damper 24 open the center ventilation duct 14 and the rear cooler duct 16 respectively, as shown by the chain line in FIG. 1 and the solid line in FIG. The cold air is blown into the vehicle compartment through both the ducts 14 and 16 and the side ventilation duct 15.

In the side ventilation mode, the mode switching damper 13 does not stop at the fully closed position shown by the solid line in FIG. 1 but at the slightly open position shown by the broken line in FIG. 1 and the solid line in FIG. At this time, since the bell crank 32 and the lever 30 are engaged with each other with a predetermined loose clearance as described above, the center ventilation mode damper 23 and the rear cooler mode damper 24 are shown in solid lines in FIG. 1 and in FIG. It is completely closed as indicated by. Therefore, the hot air coming from the heater core (not shown) enters the three-way duct 12 and blows out toward the side window through the side ventilation duct 15. Also damper
24 prevents the front passengers and rear passengers from blowing toward the face.

<Effect of the Invention> In the ventilation device for a vehicle air conditioner according to the present invention, a rear cooler mode damper is newly provided in the rear cooler duct, and the mode switching damper, the center ventilation mode damper, and the rear cooler mode damper are interlocked. Since the mode change damper is open, the center ventilation mode damper and the rear cooler mode damper are open, and when the mode change damper is closed or slightly open, the center ventilation mode damper is closed. And the rear cooler mode damper are closed.
Therefore, it is possible to prevent hot air from being blown out toward the face of the passenger in the rear seat through the duct for the rear cooler in the mode of side ventilation for defrosting the side window.

Further, since the center ventilation mode damper and the rear cooler mode damper are linked in the same state, the opening degrees of both dampers are also proportional. Therefore, the amount of air blown to the front seat side and the rear seat side can be appropriately distributed.

Furthermore, the shut damper conventionally provided in the rear cooler duct can be omitted.

[Brief description of drawings]

1 to 4 show an embodiment of a ventilation device for a vehicle air conditioner according to the present invention, FIG. 1 is a schematic vertical sectional view, and FIG. 2 is a perspective view near a three-way duct in a cooler mode. , FIG. 3 is a perspective view of the side ventilation mode, FIG. 4 is a side view showing a part of the interlocking mechanism of the mode switching damper and the center ventilation mode damper, and FIG. It is a schematic diagram shown in contrast. 12: Three-way duct, 13: Mode switching damper, 14: Center ventilation duct, 15: Side ventilation duct, 16: Rear cooler duct, 20: Air conditioning unit, 2
3: Center ventilation mode damper, 24: Rear cooler mode damper, 26: Axis, 27: Lever, 28: Pin, 29: Axis, 30: Lever, 31: Long hole, 32: Bell crank, 33: Axis,
34: Pin, 35: Rod, 36: Pin, 37: Lever, 38: Pin, 3
9: Lever, 40: Axis, 41: Pin, 42: Rod.

Claims (1)

[Scope of utility model registration request] 1. A ventilation three-way duct for blowing air to a center ventilation and side ventilation, which is opened and closed by a mode switching damper installed at an upstream portion, and further to a head of a rear seat occupant. A rear cooler duct is connected to the rear cooler duct, and a center ventilation mode damper is installed in the center ventilation opening of the three-way duct. A cooler mode damper is installed.The mode switching damper, the center ventilation mode damper, and the rear cooler mode damper have the center ventilation mode damper and the rear cooler mode damper in the open state when the mode switching damper is in the open state. And the mode switching damper is closed or slightly In the state, ventilation device and a center ventilation mode damper and the rear cooler mode damper in a vehicle air conditioning unit, characterized in that is interlocked with the interlocking mechanism to the closed state.