JPH0751931Y2 - Automotive air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of an air conditioner for a vehicle for performing air conditioning such as cooling, heating and dehumidification of the interior of a vehicle. It is used to increase the air volume.

(Prior Art) Conventionally, in order to perform air conditioning in a vehicle interior
As disclosed in Japanese Laid-Open Patent Publication No. 191511, air conditioners having various structures are used. In this conventional air conditioner for a vehicle, as shown in FIG. 2, an inside air intake 2 and an outside air intake 3 selected by an intake door 1 are provided in a casing 4 provided at the windward end. The fan 5, the evaporator 6, and the heater core 7 are arranged in this order from the windward side. By providing the air mix door 8 immediately in front of the heater core 7 that is fixed to one side of the casing 4, the air that has passed through the evaporator 6 and the air that has passed through the bypass passage 9 are separated from the air that has passed through the evaporator 6. The ratio of is adjusted.

The rear part of the heater core 7 at the leeward end of the casing 4 serves as a mix chamber 10. Then, in the mix chamber 10, the air whose temperature has risen by passing through the heater core 7 and the low-pitched air which has passed through the bumper passage 9 are mixed so that air having a uniform temperature distribution is obtained. There is. Further, on the leeward side of the mix chamber 10 (the lower side of FIG. 2, the left side of FIG. 3 described below), a distribution chamber for blowing out air-conditioned air in a desired direction.
11 are provided.

As shown in FIG. 3, the distribution chamber 11 has a ventilation outlet 12 for blowing air toward the upper body of the occupant, a defroster outlet 13 for blowing air toward the inner surface of the windshield, and a foot of the occupant. Floor outlets 14 are provided to blow out toward each.

Inside the distribution chamber 11, each of the above outlets 12, 13, 14
A ventilation door 15, a defroster door 16 and a floor door 17 are provided at positions immediately in front of the
It is possible to switch between air blowing from 12, 13, and 14 and stop.

Since the automobile air conditioner is configured as described above, if the air mix door 8 is appropriately moved and one or more doors of the ventilation door 15, the defroster door 16 and the floor door 17 are opened. The air at the desired temperature can be blown out from the desired outlet, and the air inside the automobile can be conditioned.

(Problems to be Solved by the Invention) However, in the air conditioner for a vehicle constructed and used as described above, the following problems conventionally occur.

That is, a part of the partition wall 25 constituting the mix chamber 10 and the downstream edge of the partition wall 25 projects into the distribution chamber 11 as shown in part a of FIG. However, this protruding downstream edge is the ventilation outlet.
When blowing air from 12 or defroster outlet 13,
This becomes a resistance to air circulation, which causes a decrease in the amount of air blown out from each of the blowout ports 12 and 13.

The amount of air blown out from the defroster blowout port 13 is not so large at the maximum, so that there is no practical problem. On the other hand, the amount of air blown out from the ventilation outlet 12 needs to be considerably increased in order to immediately lower the temperature in the vehicle interior immediately after the start in summer or the like.
Therefore, the reduction of the air flow due to the above-mentioned edge portion may be a practical problem.

By removing the downstream edge of the mix chamber 10, it is possible to prevent a decrease in the amount of blown air, but instead the inner dimensions of the mix chamber 10 become smaller, and air mixing in this mix chamber 10 tends to be incomplete. , Can not be adopted.

The automotive air conditioner of the present invention eliminates the above-mentioned inconveniences by making the downstream end edge of the mix chamber movable in conjunction with the movement of the ventilation door.

(Means for Solving the Problems) An air conditioner for a vehicle of the present invention is provided with an air mix door as in the conventional air conditioner for a vehicle described above.
A mix chamber that mixes the air distributed to the heater core and the bypass passage, a distribution chamber that is continuous to the downstream side of the mix chamber, and a plurality of outlets including a ventilation outlet provided in the distribution chamber, It is composed of a plurality of doors that open and close each outlet, and a part of the partition wall forming the mix chamber has a downstream edge portion of the partition wall protruding into the distribution chamber.

Particularly, in the automobile air conditioner of the present invention, the downstream end edge projecting into the distribution chamber at a part of the partition wall forming the mix chamber is provided with the upstream end of the downstream end edge. It is supported so that it can be displaced around the edge. At least one link and a rod having its end engaged with this link are provided between the downstream edge and the ventilation door that opens and closes the ventilation outlet of the plurality of doors. By providing the link mechanism having the above, the displacement means for displacing the downstream side edge portion based on the movement of the ventilation door is configured.

Then, the displacement means displaces the downstream side edge portion only when the ventilation door is fully opened based on the engagement between the long hole provided in the link and the end portion of the rod. By doing so, it functions to expand the flow passage area of the air flowing from the mix chamber to the ventilation outlet.

(Operation) In the vehicle air conditioner of the present invention configured as described above, when the ventilation door provided in the ventilation outlet is almost fully opened, the displacement formed by the link mechanism is changed. The means displaces the downstream end edge of the partition wall forming the mix chamber to widen the flow passage area of the air flowing from the mix chamber to the ventilation outlet.

Therefore, only when it is necessary to blow out a large amount of air from the ventilation outlet, the downstream end edge of the mix chamber does not become a resistance to the flow of this air, and it is possible to sufficiently discharge the air from the outlet. It can blow out a large amount of air.

On the other hand, when it is not necessary to blow out a large amount of air from the ventilation outlet, the downstream end edge of the partition wall is not displaced and the inner dimensions of the mix chamber are sufficiently secured to ensure that the mix Air mixing in the chamber can be sufficiently performed.

(Embodiment) FIG. 1 is a longitudinal sectional view showing a main part of an embodiment of an automobile air conditioner of the present invention. The distribution chamber 11 is continuously provided on the downstream side of the mix chamber 10. The mix chamber 10 is provided at the leeward side end of the casing 4 (see FIG. 2) containing the fan 5, the evaporator 6, the heater core 7, and the like. And this mix chamber 10
Is the air mix door 8 (second
(Fig.), The heater core 7 and the bypass passage 9 (Fig. 2)
Mixing air with adjusted passage rate. A plurality of outlets including a ventilation outlet 12 are provided in the distribution chamber 11 that is continuous to the downstream side of the mix chamber 10. And close to each outlet,
A plurality of doors including a ventilation door 15 for opening and closing each outlet is provided.

A part of the partition wall 25 constituting the mix chamber 10 has a downstream end edge portion 18 of the partition wall 25 protruding into the distribution chamber 11. Particularly, in the case of the air conditioner for an automobile of the present invention, the upstream end edge (the right end edge in FIG. 1) of the downstream end edge portion 18 is connected to the mix chamber 10 by the hinge 19.
The main body of the partition wall 25 constituting the above is slidably supported.

Further, a displacement means for oscillating the downstream end edge portion 18 is provided. That is, an intermediate portion of the link 20 is pivotally supported on the main body portion of the mix chamber 10, and the other end of the first rod 22 whose one end is pivotally supported on the arm 21 fixed to the downstream end edge portion 18 is connected to this link. It is pivotally supported at one end of 20 (bottom end in Fig. 1). still,
Downstream edge 18, arm 21, first rod 22, link 20
A spring (not shown) is provided at any part of the above to give the downstream end edge portion 18 elastic force in the closing direction (direction of moving to the state shown by the solid line in FIG. 1).

Further, the other end (see FIG. 1) of the second rod 24 in which one end (the right end in FIG. 1) is engaged with the elongated hole 23 formed in the other end (upper end in FIG. 1) of the link 20. The left end) is pivotally supported on a part of a ventilation door 15 for opening and closing the ventilation outlet 12. Therefore, the second rod 24 moves the link 20 to the first position only when the ventilation door 15 is opened for a certain amount or more (clockwise in FIG. 1).
Rotate clockwise in the figure.

In the vehicle air conditioner of the present invention configured as described above, the ventilation door 15 provided in the ventilation outlet 12 is changed from the closed state shown by the solid line in FIG. When rotated toward the open state shown by, the second rod 24 is pushed to the right. However, at the initial stage of rotation, one end of the second rod 24 is displaced in the elongated hole 23 and the link 20 is not rotated.

Therefore, the downstream edge 18 of the mix chamber 10 is
The state shown by the solid line in the figure remains. That is, FOOT that blows out warm air from the floor outlet 14 (see Fig. 3).
In the mode (the ventilation door 15 is fully closed) or in the BI-LEVEL mode in which the air is blown from the floor outlet 14 and the ventilation outlet 12, the ventilation door 15 is half opened. , The inner size of the mix chamber 10 is made sufficiently large so that air can be sufficiently mixed in the mix chamber 10.

Further, when the ventilation door 15 is moved until the ventilation outlet 12 is almost fully opened, as shown by the chain line in FIG. 1, one end of the second rod 24 is located at the end of the slot 23. Move up to. Then, the movement of the ventilation door 15 is transmitted to the downstream end edge portion 18 of the mix chamber 10 by meeting the link 20, the first rod 22, and the arm 21, and the downstream end edge portion 18 is made elastic. Against it, it is rotated as shown by the chain line in FIG.

As a result, the flow passage area of the air flowing from the mix chamber 10 to the ventilation outlet 12 is expanded. Therefore,
Even when a large amount of air needs to be blown out from the ventilation outlet 12, the downstream end edge portion 18 of the mix chamber 10 does not become a resistance to this air flow. Then, it becomes possible to blow out a sufficiently large amount of air from the ventilation outlet 12.

As a result of rotating the downstream end edge portion 18 as shown by the chain line in FIG. 1, the inner size of the mix chamber 10 becomes smaller, but when a large amount of air is blown out from the ventilation outlet 12, this air is cold. In most cases. Therefore, the air mixing in the mix chamber 10 may be incomplete.

Moreover, the ventilation outlet of the distribution chamber 11
There is a relatively long duct between 12 and the actual outlet on the dashboard of the car.
Therefore, even if the warm air and the cold air are not completely mixed with each other and are sent out from the ventilation outlet 12 of the distribution chamber 11, the air is sufficiently mixed while flowing through the duct. Therefore, even if the inner size of the minx chamber 10 is reduced, no practical problem occurs. On the other hand, the floor outlet 14 (3rd
Since (Fig.) Directly communicates with the room, the air blown out from the floor outlet 14 needs to be already sufficiently mixed when passing through the outlet 14.

(Advantages of the Invention) Since the air conditioner for a vehicle of the present invention is configured and operates as described above, air can be blown out from the ventilation outlet while ensuring proper mixing of air in the mix chamber. The amount can be increased. Therefore, the practical effect is large, such as the time required to bring the interior of the automobile whose temperature has risen in summer to a desired temperature can be shortened.

Also, the downstream edge of the partition wall that composes the mix chamber automatically swings due to mechanical coupling according to the movement of the ventilation door, so a troublesome electrical control circuit and downstream edge can be avoided. Even if there is no independent actuator for swinging, it is possible to reliably increase the amount of air blown from the ventilation blowout port.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a main part of an embodiment of an automobile air conditioner according to the present invention, and FIG. 2 is a cross section showing an example of an air conditioner according to the present invention. FIG. 3 is a plan view showing a conventional air conditioner and is a view corresponding to the AA cross section of FIG. 1: intake door, 2: inside air intake, 3: outside air intake, 4: casing, 5: fan, 6: evaporator, 7: heater core, 8: air mix door, 9: bypass passage, 10: mix chamber, 11 : Distribution chamber, 12: Ventilation outlet, 13: Defroster outlet, 14: Floor outlet, 15: Ventilation door, 16: Defroster door, 17: Floor door, 18: Downstream end edge portion, 19: Hinge, 20:
Link, 21: arm, 22: first rod, 23: long hole, 24: second rod, 25: partition wall.

Claims (1)

[Scope of utility model registration request] 1. A mix chamber for mixing air distributed to a heater core and a bypass passage by an air mix door, a distribution chamber continuous to the downstream side of the mix chamber, and a ventilation provided in the distribution chamber. It consists of a plurality of outlets including outlets and a plurality of doors that open and close each outlet, and a part of the partition wall that constitutes the mix chamber has a downstream end edge of the partition wall inside the distribution chamber. In a projecting air conditioner for an automobile, a downstream side edge portion projecting into the distribution chamber in a part of a partition wall forming the mix chamber is centered on an upstream side edge portion of the downstream side edge portion. And a ventilation door for supporting the displacement of the downstream side edge and opening and closing the ventilation outlet of the plurality of doors. By providing a link mechanism having at least one link and a rod whose end is engaged with this link, a displacement means for displacing the downstream end edge based on the movement of the ventilation door. This displacing means, based on the engagement between the long hole provided in the link and the end of the rod, only when the ventilation door is almost fully opened, the downstream side edge is An air conditioner for an automobile, which is characterized by widening the flow passage area of the air flowing from the mix chamber to the ventilation outlet by being displaced.