JPH08300935A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE: To reduce the maximum value of operating force for moving a film- like member in a device for changing air circulation condition by a film-like member. CONSTITUTION: A winding drive shaft 11 and a winding driven shaft 12 are connected with a driving device 17 which rotates with these shafts. The driving shaft 17 comprises a second pulley 19 coupled to the drive shaft 11, a first pulley 18 coupled to the winding driven shaft 12, and a wire 20. Therefore the second pulley 19, the winding drive shaft 11 and the first pulley 18 rotate synchronously. A spring is placed between the winding driven shaft 12 and the first pulley 18. A film-like member 200 is always given a tension by the spring. A second distance (b) between the axis of the winding driven shaft 12 and the end portion 202 in a direction of winding of the film-like member 200 coiled on the winding driven shaft 12 is always larger than the first distance (a) of the side of the winding drive shaft 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly, to a vehicle air conditioner in which a ventilation condition is changed by a film member.

[0002]

2. Description of the Related Art Conventionally, in order to reduce the size of a vehicle air conditioner, there is a method in which a ventilation member is changed by moving a film-shaped member instead of a plate-shaped switching door. This is, for example, as shown in FIGS.
0 is arranged so as to face the outlet opening 101 of the air conditioning unit, and the opening area of the outlet opening 101 is adjusted by the degree of overlap between the outlet 102 formed in the film member 100 and the outlet opening 101. Is. One end of the film member 100 is fixed to the winding drive shaft 103 rotatably supported by the air conditioning unit, and the other end of the film member 100 rotates the winding drive shaft 103. It is fixed to the winding driven shaft 104 that rotates accordingly.

Then, a step motor (not shown) is connected to the axial tip of the winding drive shaft 103, and the opening 102 of the film-shaped member 100 is driven by driving this step motor.
The position of is moved to change the winding state. In addition, as a specific configuration, a first pulley 105 is provided at the axial end of the winding drive shaft 103. On the other hand, a second pulley 107 is provided at the axial end of the take-up driven shaft via a spring 106 so as to be rotatable relative to the take-up driven shaft. The first pulley 105 and the second pulley 107 are connected by a wire 108, and the wire 108 is configured to rotate the second pulley 107 in synchronization with the rotation of the first pulley 105. There is.

In such an air conditioner, the film member 100 is bent by the wind pressure so as to swell, and the film member 10 is bulged.
Since 0 is in pressure contact with the opening edge of the blowing opening portion 101, the sealing performance of the blowing opening portion 101 is ensured. Spring 1
06 is for preventing the film-shaped member 100 from constantly bending, and the reason why the spring 106 is provided will be described below.

For example, when the film-shaped member 100 bends, the position of the opening 102 of the film-shaped member 100 shifts, and a desired air conditioning state cannot be obtained. Further, when the film-shaped member 100 is further bent, there is a problem that the film-shaped member 100 flutters due to wind pressure and abnormal noise is generated. Then, in order to solve such a problem, it is sufficient to apply a certain amount of tension to the film member 100 at all times. Therefore, in this structure, the spring 106 is provided on the winding driven shaft 104,
Addresses this issue.

[0006]

However, as a result of experiments and examinations by the present invention, it was found that the operation force when moving the film-shaped member 100 in the winding state described below is maximized. As a result of pursuing this cause, the following causes were found. Referring to FIG. 7, the take-up drive shaft 10 out of the apparent respective shaft diameters of the take-up drive shaft 103 and the take-up driven shaft 104 including the take-up amount of the film-shaped member 100.
3 is larger, and the film driving member 103 is attached to the winding drive shaft 103.
When winding 0, the spring 106 acts as described below. In order to make it easy to understand in the description, the apparent diameter of the winding drive shaft 103 including the film member 100 is d + t, and the apparent diameter of the apparent winding driven shaft 104 including the film member 100 is d. .

That is, when the first pulley 105 makes one rotation, the winding drive shaft 103 also makes one rotation, and the winding drive shaft 10
A film-shaped member 100 of about 2π (d + t) is wound around 3. Along with this, the second pulley 107 also rotates in synchronization with the first pulley 105, and therefore makes one rotation. On the other hand, the film-shaped member 100 of about 2π (d + t) is sent from the winding driven shaft 104 to the winding drive shaft 103, but since the shaft diameter is smaller than that of the winding drive shaft 103,
It will rotate once more (d + t / d rotations).

That is, the second pulley 107 makes one rotation, and the take-up driven shaft 104 connected to the second pulley 107 makes a strong one turn. Therefore, a difference in rotation occurs, and the take-up driven shaft 104 moves. It will rotate counterclockwise in FIG. 8 relative to the second pulley. Then, this rotation difference is absorbed by the expansion of the spring 106. In other words,
The spring 106 acts to increase the tension of the film member 100. As a result, when the winding drive shaft is rotationally driven, the driving force for driving the winding drive shaft 103 by the spring 106 increases, which causes an increase in the operating force of the film-shaped member 100.

Further, the film drive member 103 is attached to the winding drive shaft 103.
When the film is wound, the film-shaped member 100 does not bend and the film-shaped member 100 and the opening edge of the blowout opening 102 slide.
The generation of frictional force causes a further increase in operating force. On the other hand, the winding drive shaft 103 to the winding driven shaft 10
When the film-shaped member 100 is fed to 4, the film-shaped member 100 acts so as to loosen from a microscopic point of view.

On the contrary, in the state shown in FIG. 5, since the spring 106 acts so as to loosen, the operating force is not so large as compared with the state shown in FIG. Further, in the state as shown in FIG. 6 (the state in which the apparent shaft diameters are substantially the same), there is no difference in rotation between the winding driven shaft 104 and the first pulley 107, so such a problem does not occur. .

Therefore, in view of the above problems, it is an object of the present invention to reduce the maximum operation force when moving the film-shaped member.

[0012]

The present invention employs the following technical means in order to solve the above object. According to the first aspect of the invention, the blowout openings (7 to 9) formed in the duct (1) forming the air passage, and the film-shaped opening arranged in the duct so as to face the blowout opening. Membrane member 2
00) and adjusts the opening area of the blowout opening by moving the film-shaped member in the duct,
In a vehicular air conditioner configured to be slidable with the opening edge (16) of the blowout opening, the duct member is rotatably supported, one end of the membrane member is fixed, and the membrane member is fixed. Winding drive shaft (1
1) and drive means (21) for driving the winding drive shaft
And rotatably supported by the duct, the other end of the film-shaped member is fixed, and the film-shaped member is sent out in response to the winding drive shaft winding the film-shaped member, A take-up driven shaft (12) for taking up the film-shaped member in response to the take-up drive shaft feeding the film-shaped member, and a first provided on the take-up driven shaft and rotatable relative to the take-up driven shaft. Is interposed between the pulley (18) and the winding driven shaft and the first pulley, and the elastic force is changed by the relative rotation between the winding driven shaft and the first pulley. The tension applying means (26) for constantly applying tension to the film-shaped member and the first pulley are rotated so as to be substantially synchronized with the rotation of the winding drive shaft by the driving means. Rotation transmission for rotating the winding driven shaft via A step (20), and a first distance (a) between the axis of the winding drive shaft and the terminal end (201) in the winding direction of the film-shaped member wound around the winding drive shaft. , The second distance (b) between the axial center of the winding driven shaft and the terminal end (202) in the winding direction of the film member wound around the winding driven shaft is always the second
The feature is that the distance is larger.

According to the second aspect of the invention, the first aspect is
In the invention described above, a first distance between the axial center of the winding drive shaft and the end portion in the winding direction of the film member wound around the winding drive shaft, and the axial center of the winding driven shaft. And a second distance from the end portion in the winding direction of the film-shaped member wound around the winding driven shaft are always the second distance.
The shaft diameter of the winding driven shaft is made larger than the shaft diameter of the winding drive shaft so that the distance is larger.

According to the invention described in claim 3, claim 1
Alternatively, in the invention of claim 2, the tension applying means is composed of a spring member (26), one end side of which is fixed to the winding driven shaft, and the other end side of which is the first pulley. It is characterized by being fixed to.

According to the invention of claim 4, the invention according to claim 1
The invention according to any one of claims 1 to 3 is characterized in that the rotation transmitting means is a wire member (20).

[0016]

According to the invention of claims 1 to 4, when the drive means rotates the winding drive shaft so as to wind up the film-shaped member, the rotation transmitting means substantially rotates this rotation. The first pulley rotates in synchronization.
Since the second distance is larger than the first distance, the first pulley lags behind the rotation of the winding driven shaft, resulting in a rotation difference. Then, this rotation difference is absorbed by the relative rotation between the first pulley and the winding driven shaft, and at this time, the tension applying means acts in the direction in which the tension of the film-shaped member is relaxed.

Therefore, when the film-shaped member is wound around the winding drive shaft, since the tension of the film-shaped member by the tension-applying means always acts in a direction of being relaxed, the tension-applying means does not increase the operating force. It is possible to reduce the maximum value of the operating force.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a schematic overall configuration diagram of the vehicle air conditioner. The vehicle air conditioner has a duct 1 that forms an air passage for guiding air into the vehicle interior. The duct 1 is made of a resin material such as polypropylene. A blower 2 that generates an air flow toward the passenger compartment is disposed inside the duct 1 at an upstream side of the duct 1. In addition, at an air upstream side portion of the blower 2, an inside / outside air switching means (not shown) for determining whether the air taken into the duct 1 is the air inside the vehicle (inside air) or the air outside the vehicle (outside air). ) Is provided.

In the duct 1, an evaporator 3 for cooling the air passing therethrough is provided at a portion of the blower 2 on the air downstream side.
Is provided. The evaporator 3 serves as a refrigerant evaporator of a refrigeration cycle (not shown) mounted on a vehicle. In this refrigeration cycle, a compressor that compresses the refrigerant by the driving force of the engine into a high-temperature and high-pressure vapor-phase refrigerant, a condenser that condenses and liquefies the vapor-phase refrigerant, and an expansion valve that decompresses and expands the liquefied refrigerant. And an evaporator 3 for evaporating the refrigerant that has been expanded under reduced pressure.

Inside the duct 1, a heater core 4 for heating a predetermined amount of air cooled by the evaporator 3 is arranged at a downstream side of the evaporator 3 in the air. The heater core 4 is a heating heat exchanger that uses engine cooling water as a heat source. Further, a bypass passage 5 is provided in the duct 1 so that the air passing through the evaporator 3 bypasses the heater core 4.

In this duct 1, on the air upstream side of the heater core 4 and in the bypass passage 5, the amount of air sent to the bypass passage 5 and the amount of air sent to the heater core 4 out of the air that has passed through the evaporator 3 are shown. A heating amount adjusting means 6 for adjusting the ratio of is provided. That is, according to the air amount ratio determined by the heating amount adjusting means 6, air mixing is performed so that a desired air conditioning blowout temperature is obtained at the downstream side portions of the heater core 4 and the bypass passage 5.

At the most downstream side portion of the duct 1, there are provided outlets (7-9) for blowing out the conditioned air whose temperature is adjusted by the heating amount adjusting means 6 into the passenger compartment. Specifically, the air outlet is a face opening 7 for blowing air-conditioned air toward the upper body of the passenger and a foot opening 8 for blowing air-conditioned air toward the lower body of the passenger.
And a defroster opening 9 for blowing air toward the inner surface of the glass of the vehicle.

These openings 7 to 9 are used for the outlet switching device 1.
The opening area is adjusted by 0. Hereinafter, the outlet switching device 10 will be described with reference to FIGS. 1 to 4. FIG. 1 shows a schematic configuration diagram of the outlet switching device 10. FIG. 3 shows a view on arrow B of FIG. FIG. 4 shows a schematic perspective view of the outlet switching device 10. As shown in FIG. 3, the outlet switching device 10
Is the winding drive shaft 11, the winding driven shaft 12, and the film member 2
00 and 00.

The winding drive shaft 11 is arranged on the left side of the face opening 7 as shown in FIG. Winding drive shaft 1
1, the axial direction of which is directed to the upper side and the back side of the paper in FIG.
Both ends are supported by the duct 1 and are rotatable.
The take-up driven shaft 12 has a foot opening 8 as shown in FIG.
It is located on the right side of. The take-up driven shaft 12 has its axial direction directed to the upper side and the rear side of the paper surface in FIG. 2, both ends are supported by the duct 1, and are rotatable.

The membranous member 200 is made of a flexible film material and has an outer shape of a substantially rectangular shape. As shown in FIG. 2, the film member 200 has a face opening 7, a defroster opening 9 and a foot opening 8.
It is arranged so that it may face. Both ends in the longitudinal direction of the film member 200 are fixed to the winding drive shaft 11 and the winding driven shaft 12, respectively.

The length of the film member 200 in the longitudinal direction is longer than the distance between the winding drive shaft 11 and the winding driven shaft 12, and the film member 200 is always a predetermined amount of the winding drive shaft. 11 or the take-up driven shaft 12 is wound around at least one of them. Then, the film member 200 is
The winding drive shaft 11 and the winding driven shaft 12 rotate together, and the opening 15 moves. Specifically, when the winding drive shaft 11 winds up the film member 200, the winding driven shaft 12 sends out the film member 200, and the opening 15 moves leftward in FIG. On the other hand, when the take-up driven shaft 12 takes up the film member 200, the take-up drive shaft 11 sends out the film member 200, and the opening 15 moves leftward in FIG. 1. In this embodiment, the blowout mode can be switched by using the film member 200 over almost the entire area (from one end side to the other end side).

In fact, between the winding drive shaft 11 and the winding driven shaft 12, a face outlet 7 and a foot outlet 8 are provided.
Along the arrangement of the defroster outlets 9 and the film-shaped member 1
In order to arrange 00 in a V shape, the intermediate pulley 13,
14 are installed, and these intermediate pulleys 13 and 14
Is linked with the winding drive shaft 11 and the winding driven shaft 12.

Here, the shaft diameter of the winding follower shaft 12 is larger than the shaft diameter of the winding drive shaft 11. The method of setting the shaft diameter of the winding driven shaft 12 is as follows.
00 is wound to the maximum (within the use range of the film member 200), the apparent shaft diameter including the film member 200 is set to be larger than the shaft diameter of the winding drive shaft 11. . Specifically, as shown in FIG. 1, a first distance a between the axial center of the winding drive shaft 11 and the end portion 201 in the winding direction of the film-shaped member 200 on which the winding drive shaft 11 is wound. And On the other hand, the second distance b between the axial center of the winding driven shaft 12 and the end portion 202 in the winding direction of the film-shaped member 200 on which the winding driven shaft 12 is wound is set to be the second distance b at all times. It is set to be larger.

Hereinafter, for simplification of the description, the description will be made by replacing the opening area of the face opening portion 7 with the film member 200. 1, 3 and 4 correspond to this, and FIGS. 1 and 3 show a state in which the film member 200 is wound around the winding drive shaft 11 to the maximum extent. Membrane member 200
As shown in FIGS. 1 and 3, an opening portion 15 for switching the air outlet mode is formed in the air passage, and the conditioned air is blown to the face opening portion 7 through the opening portion 15. Then, similar openings are formed in the film member 200 along the longitudinal direction so as to form a predetermined pattern.

That is, in FIG. 2, when the winding drive shaft 11 and the winding driven shaft 12 rotate in conjunction with each other, the film member 200 is rotated.
The position of the opening formed in is moved, and the desired blowing mode is selected. For example, in the face mode (blowing mode in which conditioned air is sent only to the face opening 7), the opening 15 is arranged so as to overlap the face opening 7. On the other hand, the defroster air outlet 9 and the foot air outlet 8 are closed at the portions where the openings of the film member 200 are not formed.

Here, in the blowout opening portion to be simply opened,
The sealability cannot be ensured only by arranging the openings 15 of the film member 200 so as to face each other and by arranging the portion of the film member 100 at which the opening is not formed so as to face the opening for blowing to be closed. Therefore, the film member 200 is configured to be bent by the wind pressure, and the film member 200 is bent by the wind pressure.
Bulges upward in FIG. 1 and the opening edge 1 of the face opening 7
By making pressure contact with 6, the sealing property is secured.

A driving device 17 for moving the film member 200 is connected to the winding driving shaft 11 and the winding driven shaft 12, and the driving device 17 will be described below. The drive device 17 is connected to one end side (see FIGS. 3 and 4) of the winding drive shaft 11 and the winding driven shaft 12 in the axial direction, and includes the first and second pulleys 18 and 19, and the first and second pulleys 18 and 19. , A cable 2 connecting the second pulleys 18, 19
0 and driving means 21 (see FIG. 3) for driving the second pulley 19.

The second pulley 19 has a reel shape as shown in FIG. 4, and has a fitting portion 22 on one end side in the axial direction.
Are integrally formed. The fitting portion 22 of the second pulley 19 and the winding drive shaft 11 is fitted into a fitting hole 23 formed at one end of the winding driven shaft 12. Further, since the shape of the fitting portion 22 is a rotation preventing shape with respect to the fitting hole 23, the second pulley 19 and the winding drive shaft 11 rotate integrally.

The first pulley 18 also has substantially the same structure as the second pulley 19. The difference is that the fitting part 2
The shape of 4 does not have a rotation preventing shape with respect to the fitting hole 25, and the first pulley 18 is rotatable relative to the winding driven shaft 12. Then, as shown in FIG. 3 (not shown in FIG. 4), a spring 26, which is a spring member, is interposed between the first pulley 18 and the winding driven shaft 12. The spring 26 is for applying tension to the film-shaped member 200 as described above in the present specification, and one end side is fixed to the first pulley 18 and the other end side is fixed to the winding driven shaft 12. Has been done. by this,
The membrane member 200 is tensioned by the spring 26 in any state.

Both ends of the cable 20 are first and
The film member 200 is fixed to the second pulleys 18 and 19.
Is wound by a predetermined amount corresponding to the moving range of. The cable 20 causes the first pulley 18 to rotate substantially in synchronization with the rotation of the second pulley 19. The driving means 21 is composed of, for example, a step motor 21. This step motor 21 is
The second pulley 19 is connected to the end surface on the opposite side of the fitting portion 23. Then, the step motor 21 is driven by a predetermined number of steps to rotate the second pulley 19, and accordingly, the first pulley 18 is further synchronized with the rotation of the second pulley 19 via the cable 20. Will rotate.

Thus, for example, when the second pulley 19 in FIG. 4 rotates clockwise, the film-shaped member 200 is sent from the winding drive shaft 11 to the winding driven shaft 12, and the film is formed on the winding driven shaft 12. The member 200 is wound up. On the other hand, when the second pulley 19 in FIG. 4 rotates counterclockwise, the film-shaped member 200 is sent from the winding driven shaft 12 to the winding drive shaft 11, and the film-shaped member 200 is attached to the winding drive shaft 11. Being rolled up. As a result, the film-shaped member 200 opens and closes the desired outlet to switch to the desired outlet mode.

The heating amount adjusting means 6 also has substantially the same structure as the above-mentioned blowout port switching device 10, and a detailed description thereof will be omitted. However, briefly, an opening formed in the film-shaped member 200 will be described. A desired conditioned air temperature is obtained by adjusting the amount of air sent to the heater core 4 and the amount of air sent to the bypass passage 5 according to the opening area of the. Next, the operation of the above-described outlet switching device 10 will be specifically described with reference to FIG.

When the film member 200 is wound around the winding drive shaft 11 as described above in this specification, the spring 26 is used.
Acts in a twisting direction in a certain state, and the operating force for moving the film-shaped member 200 becomes the maximum value. However, in this embodiment, the film-shaped member 2 is attached to the winding drive shaft 11.
When 00 is wound up, the second pulley 19, the first pulley 18 and the winding drive shaft 11 rotate in synchronization with each other. Then, since the second distance b is larger than the first distance a, the take-up driven shaft 12 has a rotation difference after the rotation of the first pulley 18, and the take-up driven shaft 12 has the first difference. It rotates in the direction shown by the arrow in FIG. 1 relative to the pulley 18.

At this time, the spring 26 serves as the film member 20.
The tension of 0 will be relaxed. Then, as the film member 200 is gradually wound around the winding drive shaft 11, the operating force of the film member 200 gradually decreases. That is, when the film member 200 is wound around the winding drive shaft 11, unlike the conventional case, the spring 26 always acts so as to loosen, and therefore, the maximum value of the operating force for moving the film member 200 should be reduced. Will be able to. As a result, for example, the durability of the step motor 21 can be improved, and the durability of the air outlet switching device 10 can also be improved.

Although the embodiments of the present invention have been described above, the present invention can also be applied to the following modifications. In the above-mentioned embodiment, it is used for switching the air outlets over substantially the entire area of the film-shaped member 200, and the shaft diameter with the take-up driven shaft 12 is made larger than the shaft diameter of the take-up drive shaft 11. However, it is necessary for switching the air outlets. In the usage range of the film-shaped member 200, the film-shaped member 200
May be used in a state of being always wound around the winding driven shaft 12 or the winding driving shaft 11 to increase the apparent shaft diameter of the winding driven shaft. In this case, there is the film-shaped member 200 that does not participate in the switching of the air outlet, and the above embodiment is more advantageous in terms of cost.

Further, in the above embodiment, the step motor 21 is used as the driving means, but any motor may be used, or the membrane member 200 may be manually moved. Further, in the above embodiment, the switching of the air outlet is described, but it may be applied to the heating amount adjusting means 6 described above.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an outlet switching device according to an embodiment of the present invention.

FIG. 2 is an overall schematic configuration diagram of a vehicle air conditioner in the above embodiment.

FIG. 3 is a diagram showing a view on arrow B of FIG.

FIG. 4 is a schematic perspective view of an outlet switching device in the above embodiment.

5A and 5B are a schematic configuration diagram and a diagram showing an operation of a conventional air outlet switching device.

6A and 6B are a schematic configuration diagram and an operation diagram of a conventional outlet switching device.

7A and 7B are a schematic configuration diagram and a diagram showing an operation of a conventional air outlet switching device.

[Explanation of symbols]

 1 Duct 7 Face Opening (Blowout Opening) 8 Defroster Opening (Blowout Opening) 9 Foot Opening (Blowout Opening) 11 Winding Drive Shaft 12 Winding Driven Shaft 15 Opening Edge 15 18 First pulley 20 Wire (rotation transmitting means) 26 Spring (tensioning means) 200 Membrane member

Claims (4)

[Claims] 1. A blowout opening formed in a duct forming an air passage, and a film-like film member arranged in the duct so as to face the blowout opening. In a vehicle air conditioner configured so that a member moves in the duct to adjust the opening area of the blowout opening and to be slidable with the opening edge of the blowout opening, the member is rotatably supported by the duct. The one end of the film-shaped member is fixed, and a winding drive shaft that winds or sends out the film-shaped member, a drive unit that drives the winding drive shaft, and a rotatably supported by the duct. , The other end of the film member is fixed, and the winding drive shaft sends out the film member according to the winding of the film member, and the winding drive shaft sends out the film member. A winding follower that winds up the film member according to A driving shaft, a first pulley provided on the winding driven shaft and rotatable relative to the winding driven shaft, and interposed between the winding driven shaft and the first pulley. The elastic force is changed by relative rotation between the driven shaft and the first pulley, and the elastic force causes the elastic force to constantly apply tension to the film-shaped member, and the rotation of the winding drive shaft by the drive unit. Rotation transmitting means for rotating the first pulley to rotate the first driven pulley through the tension applying means so as to be substantially synchronized with each other, and an axis center of the winding drive shaft and the winding drive shaft. A first end of the film-like member wound around the first end in the winding direction;
And the second distance between the axial center of the winding driven shaft and the end portion of the film-shaped member wound around the winding driven shaft in the winding direction are always the second distance. A vehicle air conditioner characterized by being made larger. 2. A first distance between the axis of the winding drive shaft and the end of the film-shaped member wound around the winding drive shaft in the winding direction, and the axis of the winding driven shaft. And a second distance between the winding driven shaft and the terminal end in the winding direction of the film-shaped member, the shaft of the winding driven shaft is set so that the second distance is always larger. The vehicle air conditioner according to claim 1, wherein a diameter is made larger than a diameter of the winding drive shaft. 3. The tension applying means is composed of a spring member, one end side of which is fixed to the winding driven shaft and the other end side of which is fixed to the first pulley. The vehicle air conditioner according to claim 1 or 2. 4. The vehicle air conditioner according to any one of claims 1 to 3, wherein the rotation transmission means is composed of a wire member.