JP3203668B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle in which a ventilation state is changed by using a membrane member.

[0002]

2. Description of the Related Art As a prior art of an air conditioner for a vehicle in which a ventilation state is changed by using a membrane member, Nippon Denso Publication
-025 (issued February 15, 1990).

In the above prior art, a film damper is used as a blower switching damper, and both ends of the film damper are wound on separate shafts. And the two shafts winding up both ends of the film damper are connected to each other by a belt,
The belt is moved by driving the motor, and the film damper is wound and fed.

[0004]

However, when a belt is used as a means for connecting two shafts as in the above-mentioned prior art, an obstacle such as a servomotor or the like in a portion where the belt is to be disposed is provided. In the case where there is a protrusion, it is difficult to dispose the belt so as to avoid the obstacle or the like.
In addition, since the cabin space is small, a compact connecting means is desired.

In view of the above problems, the present invention is provided with a means for connecting the shafts so as to easily cope with an assembly error, an obstacle, and the like. It is an object of the present invention to provide a vehicle air conditioner having a short length.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a duct for introducing air into a vehicle cabin, and a temperature disposed in the duct for adjusting the temperature of the air. Adjusting means, a plurality of outlets provided with holes in a part of the duct on the passenger compartment side to blow out the air from the temperature adjusting means toward the passenger compartment, and A first shaft and a second shaft rotatably supported, and an opening disposed in the duct for changing a ventilation state of the air in the duct, and both ends of the first shaft and the second shaft; A film-like member wound around the second shaft, driving means for driving the first shaft to rotate, a first bevel gear connected to the first shaft, and a second bevel gear connected to the second shaft Bevel gear and the first bevel tooth To the second bevel gear, a rotating cable having at one end a third bevel gear meshing with the first bevel gear, and at the other end having a fourth bevel gear meshing with the second bevel gear; One bevel gear and the third
The third bevel gear is rotatably supported so as to mesh with the bevel gear, and the first gear support member fixed to the duct is meshed with the second bevel gear and the fourth bevel gear. The gist of the present invention is a vehicle air conditioner including a second bevel gear rotatably supporting the fourth bevel gear and a second gear support member fixed to the duct.

[0007]

The first bevel gear and the third bevel gear can mesh with each other at various angles in a plane substantially perpendicular to the axis of the first bevel gear, and both the second and fourth bevel gears can be variously meshed. Can be engaged at different angles. Here the first
Even when the angle at which the bevel gear and the third bevel gear are engaged is different from the angle at which the second bevel gear and the fourth bevel gear are engaged, the rotary cable has flexibility. Therefore, the third bevel gear and the fourth bevel gear which are both ends of the rotary cable can be meshed with the first bevel gear and the second bevel gear. Therefore, even when there is a protrusion between the first shaft and the second shaft, or when there is a variation in dimensions at the time of assembly, the rotary cable can flexibly cope with it. When the driving means rotates the first shaft, the rotation of the first shaft is transmitted to the second shaft via the first bevel gear, the third bevel gear, the fourth bevel gear, and the second bevel gear, and the film-like member is formed. Can be wound up or sent out. In addition, since the directions of the respective rotating shafts can be changed suddenly at substantially right angles between the bevel gears, the size of the protrusion from the side surface of the duct can be reduced.

[0008]

As described above, in the present invention, a flexible rotating cable is used as means for transmitting the rotation of the first shaft to the second shaft. In this case, the rotation of the first shaft can be easily transmitted to the second shaft even when there is a dimensional deviation, a protrusion, or the like. Further, by combining the bevel gear and the rotary cable, the degree of freedom in the direction in which the rotary cable is arranged can be further increased, and a compact device can be obtained.

[0009]

Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is an overall configuration diagram showing the entire vehicle air conditioner according to the first embodiment.
Contains temperature control means such as taco. In the duct 1, a blower (not shown) that blows air into the duct 1 is disposed at the most upwind side in a portion surrounded by a broken line 2 in FIG. An evaporator 3 serving as a temperature adjusting means for cooling the air blown from the blower is provided downstream of the blower. The evaporator 3 cools the evaporator 3 immediately downstream of the evaporator 3. A heater core 4 is provided for heating cold air to produce hot air. The cool air that has passed through the evaporator 4 is blown into the vehicle interior through the first passage 5 and the second passage 6.

On the passenger compartment side of the duct 1, a heat outlet 7 for blowing air toward the feet of the occupant, a defroster outlet 8 for blowing air toward the windshield, and an upper body of the occupant. A vent outlet 9 for blowing air toward is formed. The air blown from the heat outlet 7 is blown out in a direction perpendicular to the paper surface.

A first pulley 10 is disposed on the upper right side of the heater core 4 in FIG. A third shaft (not shown) is rotatably supported by the duct 1 on the back side of the first pulley 10 in the plane of the paper. The first pulley 10 and the third shaft are connected to each other, and the first pulley 1
Zero also rotates.

On the right side of the heater core 4 in the drawing, a second pulley 12 is disposed on the front side of the duct 1 in the drawing. A fourth shaft (not shown) is rotatably supported by the duct 1 on the back side of the second pulley 12 on the paper surface in a direction perpendicular to the paper surface. The second pulley 12 and the fourth shaft are connected to each other, and the fourth shaft rotates with the rotation of the second pulley 12.

The third shaft has a hollow content, and a first DC motor and a first reduction gear (not shown) connected to each other are built in the hollow portion. Here, since the outer peripheral surface of the first reduction gear and the inner peripheral surface of the third shaft are bonded, by fixing the first output shaft (not shown) protruding from the first reduction gear to the duct 1, When the first DC motor is driven, the first DC motor
The reducer and the third shaft rotate together. Note that the structures of the first DC motor, the first reduction gear, and the first output shaft are the same as the structures of a second DC motor 27, a second reduction gear 28, and a second output shaft 29 in FIG.
The illustration is omitted.

The first pulley 10 and the second pulley 12 are connected by a timing belt 17, and the rotation of the first pulley 10 is transmitted to the second pulley 12. When the third shaft is rotated by the driving of the first DC motor, the rotation of the third shaft is changed to the first pulley 10,
The power is transmitted to the fourth shaft via the timing belt 17 and the second pulley 12, and the fourth shaft also rotates.

A rotatable first intermediate shaft 18 is provided directly below the first pulley 10 in FIG.
It is supported by. A first film damper 19 formed of a flexible film and having an opening through which air can flow is indicated by a broken line in the drawing, and one end is wound around a third shaft behind the first pulley 10. The other end is wound around the fourth shaft behind the second pulley 12. Also the first
The film damper 19 includes a third shaft, a first intermediate shaft 18, an upper side surface portion of the heater core 4 in the drawing, an upstream side surface portion of the heater core 4, a lower side surface portion of the heater core 4 in the drawing, and a fourth shaft. It is stretched across. By rotating the third shaft to move the first film damper 19, the temperature of the air blown into the vehicle compartment is adjusted. Further, the first film damper 19 is provided with small holes (not shown) which are parallel to the traveling direction and arranged in a line at equal intervals. The row of small holes is formed by a first photo-interrupter 20 described later and a first film damper 19.
To be detected.

The first photo-interrupter 20 is composed of two photo-interrupters, and the distance between the two photo-interrupters is equal to the distance between each small hole (detected portion) provided in the first film damper 19. .5 times. The two photo interrupters have a U-shape, and are fixed to the duct 1 so as to sandwich the detected portion of the first film damper 19. When the first film damper 19 moves, the two photo-interrupters alternately detect the portions to be detected of the first film damper 19, and input a signal transmitted each time to a microcomputer (not shown). The position of the damper 19 is detected.

A first gear box 21 is disposed at a lower portion on the right side of the heat outlet 7 in FIG. Hereinafter, description will be made with reference to FIGS. Also the first
A first bevel gear 22 (not shown) which is covered by the gear box 21 is also arranged on the near side of the duct 1 in the drawing.
On the back side of the first bevel gear 22 in the drawing, a first not-shown
A shaft 23 is supported by the duct 1 so as to be rotatable in a direction perpendicular to the plane of the drawing. Further, the first bevel gear 22 and the first shaft 23 are connected, and the first bevel gear 22 rotates with the rotation of the first shaft 23.

A second bevel gear 24 is disposed immediately below the right end of the vent outlet 9 in the drawing, in front of the duct 1 in the drawing (the second gear box 26 is removed in FIG. 2). Is shown). On the back side of the second bevel gear 24 on the paper surface, a second shaft 25 is supported by the duct 1 so as to be rotatable in a direction perpendicular to the paper surface of FIG. The second bevel gear 24
And the second shaft 25 are connected to each other, and the second bevel gear 2
With the rotation of 4, the first shaft 23 also rotates. In the present embodiment, the first bevel gear 22 is
A second gearbox 26 is mounted to cover the second bevel gear 24, just as the gearbox 21 is mounted.

The first shaft 23 has a hollow content, and the hollow portion contains a second DC motor 27 and a second reduction gear 28 connected to each other. Here, since the outer peripheral surface of the second reduction gear 28 and the inner peripheral surface of the first shaft 23 are bonded, by fixing the second output shaft 29 protruding from the second reduction gear 28 to the duct 1,
When the second DC motor 27 is driven, the second DC motor 27
The second reduction gear 28 and the first shaft 23 rotate together with respect to the duct 1.

The first bevel gear 22 and the second bevel gear 24 are connected by a flexible rotating cable 30. The rotating cable 30 has a third bevel gear 31 at one end on the first bevel gear 22 side and a fourth bevel gear 32 at one end on the second bevel gear 24 side. First gearbox 21
Constitutes a first gear supporting member, and the first bevel gear 22
And the third bevel gear 31 are engaged with each other,
The first bevel gear 22 and the third bevel gear 31 are fixed.
The second gear box 26 constitutes a second gear supporting member, and the second bevel gear 24 and the fourth bevel gear 32 are arranged so that the second bevel gear 24 and the fourth bevel gear 32 are engaged with each other. Is fixed.

When the first shaft 23 is rotated by the driving of the second DC motor 27, the rotation of the first shaft 23 is changed to the first bevel gear 22, the third bevel gear 31, the rotating cable 30, the fourth bevel gear 32, and the The power is transmitted to the second shaft 25 via the two bevel gears 24 and the second shaft 25
Also rotate.

At the boundary between the heat outlet 7 and the defroster outlet 8, a rotatable second intermediate shaft 33 is provided as shown in FIG.
Are supported by the duct 1 in the direction perpendicular to the plane of the drawing. At the boundary between the defroster outlet 8 and the vent outlet 9, a rotatable third intermediate shaft 34 is supported by the duct 1 in a direction perpendicular to the plane of the drawing.

A second film damper 3 formed of a flexible film and having an opening through which air can flow.
5 is indicated by a broken line in the figure, and one end of the first shaft 2
3 and the other end is wound around the second shaft 25. The second film damper 35 is a first shaft 2
3, the second intermediate shaft 33, the third intermediate shaft 34, and the second shaft 25 are stretched. Then, the first shaft 23 is rotated, and the second film damper 35 is rotated.
To adjust the proportion of air blown out from each outlet. In addition, the second film damper 35 includes:
Small holes (not shown) are provided in a line in parallel with the traveling direction and at equal intervals. The row of small holes is a detected part for the second photo interrupter 36 described later to detect the position of the second film damper 35.

The second photo-interrupter 36 is composed of two photo-interrupters, and the distance between the two photo-interrupters is equal to the distance between each small hole (detected portion) provided in the second film damper 35. .5 times. These two photo interrupters have a U-shape, and are fixed to the duct 1 so as to sandwich the detected portion of the second film damper 35. When the second film damper 35 moves, the two photo-interrupters alternately detect the detected portion of the second film damper 35, and input a signal to be transmitted each time to a microcomputer (not shown), The position of the damper 35 is detected.

Above the second pulley 12 in FIG. 2, a rotatable cool air bypass damper shaft 37 is supported by the duct 1 in a direction perpendicular to the plane of the drawing, and the end of a cool air bypass damper 38 is fixed to this shaft 37. Have been. A not-shown servo motor and a cool air bypass damper shaft 37 are connected to each other, and the servo motor drives the cool air bypass damper shaft 37 to open and close the cool air bypass damper 38.

The partition plate 39 has a width from the fourth shaft supported on the back side of the second pulley 12 to the cold air bypass damper shaft 37 and is provided in a direction perpendicular to the paper surface, and the second passage 6 and the cold air bypass passage are provided. The cold air that has passed through 40 does not leak to the left side of the partition plate 39 in the figure.

Part of the conditioned air is blown out from the rear foot outlet 41 toward the foot of the rear seat. Drain water generated by heat exchange between the evaporator 3 and the air is discharged from the drain water outlet 42 to the outside of the vehicle.

Next, the points of this embodiment will be described with reference to FIG. Here, FIG. 1 is a partial sectional view taken along the line AA of FIG. The second output shaft 29 has a D-shaped cross section, and the D-shaped portion is engaged with the duct 1 and fixed. Since the second output shaft 29 is fixed to the duct 1, the second output shaft 29
When the C motor 27 is driven, the second DC motor 27 and the second reduction gear 28 rotate around the second output shaft 29. By the way, since the second reduction gear 28 and the first shaft 23 are bonded, when the second DC motor 27 and the second reduction gear 28 rotate, the first shaft 23 rotates accordingly. That is, even if the second DC motor 27 and the second reduction gear 28 are built in the first shaft 23, the first shaft 23 can be rotated.

A power cord 43, one end of which is connected to the second DC motor 27, passes through a first hole 44 provided at the front end of the first shaft 23 on the front side of the drawing, and rotates the first bevel gear 22. The other end is connected to a control device (not shown) through the shaft portion.

Incidentally, the cross-sectional shape of the first hole portion 44 has straight portions facing each other, and both ends are continuous with a curved portion. The cross-sectional shape of the tip of the first bevel gear 22 is also the same as the cross-sectional shape of the first hole 44. And the first bevel gear 2
2 and the first hole 44 are tightly fixed to each other with the duct 1 interposed therebetween.
The bevel gear 22 rotates accordingly.

Since the first bevel gear 22 and the third bevel gear 31 are engaged, when the first bevel gear 22 rotates, the third bevel gear 31 also rotates. When the third bevel gear 31 rotates, the fourth bevel gear 32 also rotates in the same direction via the rotating cable 30. The fourth bevel gear 32 and the second bevel gear 2
4, the second bevel gear 24 also rotates when the fourth bevel gear 32 rotates.

By the way, the first gear box 21 fixes the first bevel gear 22 and the third bevel gear 31 so that the directions of the respective rotation axes are substantially perpendicular and the respective gears mesh with each other. It is fixed to the duct 1. The second gear box 26 includes a fourth bevel gear 32 and a second bevel gear 32.
The bevel gear 24 is fixed so that the directions of the respective rotation axes are substantially perpendicular to each other and the respective gears are engaged with each other, and is fixed to the duct 1.

A second hole 45 is provided at the front end of the second shaft 25 on the front side of the drawing. The cross section of the second hole 45 has straight portions facing each other, and both ends are curved portions. Is continuous. The sectional shape of the tip of the second bevel gear 24 is also the same as the sectional shape of the second hole 45. And the second
Since the hole 45 and the tip of the second bevel gear 24 are tightly connected to each other with the duct 1 interposed therebetween, when the second bevel gear 24 rotates, the second shaft 25 also rotates in the same direction.

In FIG. 2, the second film damper 35
Is virtually shown. A portion indicated by reference numeral 46 is an opening of the second film damper 35. When the first shaft and the second shaft are connected by the flexible rotary cable as in the first embodiment, even if the rotary shaft of the rotary cable is arranged in a slightly bent state, the rotation of the first shaft is prevented. To the second shaft.

In the first embodiment, the first bevel gear and the third bevel gear are fixed by the first gear box, and the second bevel gear and the fourth bevel gear are fixed by the second gear box.
Since the gearbox and the second gearbox have a case shape covering the bevel gear, the first gearbox and the second
The gearbox can also protect the bevel gear from surrounding water, dust and the like.

In the first embodiment, the first bevel gear and the third
The bevel gears are meshed so that the directions of the respective rotating shafts are substantially at right angles, and the second bevel gears and the fourth bevel gear are meshed so that the directions of the respective rotating shafts are substantially at right angles. When the bevel gear is used between the rotating cable and the first shaft or the bevel gear is used between the rotating cable and the second shaft, the rotating cable is directly connected to the first shaft and the second shaft without using the bevel gear. There is no need to use extra space as compared to connecting two shafts.

In the first embodiment, since the DC motor and the speed reducer are built in the first shaft, an extra space is used as compared with the conventional case where the motor is provided outside the duct. Eliminates the need.

In the first embodiment, since the detected portion is provided directly on the film damper and the detected portion is detected by the two photo interrupters, the film damper can be stopped at an accurate position.

In the first embodiment, the bevel gear and the rotary cable are applied to the air outlet switching damper, but may be applied to the air mix damper (19 in FIG. 2). Next, a second embodiment utilizing the fact that the rotating cable is flexible will be described with reference to FIG. Here, FIG. 3 shows a case where there is a protrusion at the portion where the rotating cable is disposed.
It is the typical perspective view which showed typically the arrangement | positioning state of the rotating cable.

As shown in FIG. 3, even when there is a projection 47 at the portion where the rotary cable 30 is provided, the first bevel gear 2
If the positions where the second and third bevel gears 31 mesh with each other and the second bevel gear 24 and the fourth bevel gear 32 mesh with each other are adjusted at the time of initial assembly, the projection 47
, The rotating cable 30 can be provided. Since the rotating cable 30 is flexible, the rotation of the first shaft 23 can be transmitted to the second shaft 25 even if the rotating cable 30 is arranged as curved as shown in FIG.

In the first and second embodiments, the film member is the second film damper 35, and the driving means is the second DC motor 27 and the second speed reducer 28.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view taken along the line AA in FIG. 2, showing a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram showing the entire vehicle air conditioner in the first embodiment.

FIG. 3 is a schematic perspective view schematically showing an arrangement state of a rotary cable in a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Duct 3, 4 Temperature adjustment means 7, 8, 9 Plural outlets 23 1st shaft 25 2nd shaft 35 Membrane member 27, 28 Drive means 22 1st bevel gear 24 2nd bevel gear 31 3rd bevel gear 32 4th bevel gear 30 rotation cable 21 1st gear support member 26 2nd gear support member

Claims (1)

(57) [Claims] 1. A duct for introducing air into a vehicle interior, a temperature adjusting means disposed in the duct for adjusting the temperature of the air, and a flow of the air from the temperature adjusting means to the interior of the vehicle. A plurality of air outlets provided with holes in a part of the duct on the passenger compartment side, and a first shaft and a second shaft rotatably supported on side surfaces of the duct, for blowing out toward the vehicle. A film-shaped member disposed in the duct, having an opening for changing a ventilation state of the air in the duct, and having both ends wound around the first shaft and the second shaft; Driving means for driving the first shaft to rotate; a first bevel gear connected to the first shaft; a second bevel gear connected to the second shaft; and a second bevel gear connected to the second shaft. To the bevel gear, with one end A rotating cable having a third bevel gear meshing with the bevel gear, and having a fourth bevel gear at the other end meshing with the second bevel gear; the first bevel gear and the third bevel gear;
The third bevel gear is rotatably supported so as to mesh with the bevel gear, and the first gear support member fixed to the duct is meshed with the second bevel gear and the fourth bevel gear. And a second gear support member rotatably supporting the fourth bevel gear and fixed to the duct.