JPH0848129A - Air passage selector - Google Patents

Abstract

PURPOSE:To reduce the number of part items in a device which in made up so as to select an air passage by means of a door motion. CONSTITUTION:A rotary type door 19 to change a blowoff mode is installed in an inner part of an air passage part in a duct case 12. This door 19 is made up of installing a film member 21 with a vent port in the peripheral part of a plastic door body 20. Then a large diametral cylindrical fulcrum part 26 is integrally installed in an end plate part 22 of the door body 20. In succession, this fulcrum part 26 is supported on a bearing part 29 of the duct case 12, then a pin 30 is integrally installed in a part projected to an outer part of this duct case 12. Successively, a tip part of a control cable 27 to be pushed and/or retracted by operation of a blowoff mode selector lever is connected to the pin 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow path switching device for use in, for example, an air conditioner for a vehicle, which switches the air flow path in a duct case with a door.

[0002]

2. Description of the Related Art For example, in an air conditioner incorporated in an automobile, a plurality of air outlets (FACE, FOO) are provided in a duct case from a main body unit having a blower, a cooling device (evaporator) and a heating device (heater core).
(T, DEF, etc.) to supply cold air or hot air. In this case, the air flow path, that is, the blowing mode is switched by a butterfly (or rotary) door rotatably provided in the duct case.

12 to 14 show a mounting structure of a conventional butterfly type door 1 in a duct case 2. That is, the door 1 is configured such that packings 5 and 5 are attached to door plate portions 4 that are integrally provided on the left and right of a shaft portion 3 that extends vertically. The shaft portion 3 projects vertically from the door plate portion 4. On the other hand, as shown in FIG. 13, a bearing portion 6 is provided on the outer wall portion of the duct case 2, and in the door 1, the protruding portion of the shaft portion 3 is rotatably supported by the bearing portion 6. As a result, it is disposed in the duct case 2. A seal guide 7 is provided inside the duct case 2 so that the packings 5 and 5 come into close contact with each other when the door 1 is closed.

An upper end portion of the shaft portion 3 in the figure projects to the outer surface portion of the duct case 2, and one end portion of the link lever 8 is attached to the projecting portion. The pin 8 provided at the other end of the link lever 8
The tip of the control cable 9 is connected to a. The control cable 9 has a cable clamp 10 whose middle part is provided on the outer wall of the duct case 2.
The other end side is connected to a blowout mode switching lever provided on an operation panel (not shown) in the vehicle. With this, the occupant operates the blowout mode switching lever to push and pull the control cable 9, whereby the door 1 is rotated and the air flow path (blowing mode) is switched.

In addition, in recent years, for example, Jitsuko Sho 61-40.
As shown in Japanese Patent No. 588, instead of the butterfly door 1 described above, a cylindrical rotary door having an air passage portion in a peripheral wall portion for switching the air flow path has been provided. There is. Although not shown, even in this rotary door, a shaft portion is provided at the center of both end faces, and the shaft portion is supported by the bearing portion 6 of the duct case 2 in the same manner as described above, and the control cable is further provided. The driving force of 9 is transmitted to the shaft portion via the link lever 8. Further, there are some which use a plurality of link levers, and the link lever 8 is directly connected by a motor.
The one that operates is also provided.

[0006]

However, in the structure in which the link lever 8 is interposed to transmit the driving force of the control cable 9 to the door 1 as described above, the number of parts is increased and the cost is increased. It was inferior in assembling. Further, since the link lever 8 is interposed, there is a drawback that the drive force is slightly transmitted.

The present invention has been made in view of the above circumstances, and an object thereof is to switch the air flow passage by rotating the door, and to reduce the number of parts. It is to provide a switching device.

[0008]

An air flow path switching device according to claim 1 of the present invention is a duct case in which an air flow path is formed, and an air flow path rotatably provided in the duct case. A switching door, a driving means provided outside the duct case for giving a rotational driving force to the door, and a link means for transmitting the driving force of the driving means to the door, the link means are provided. The feature is that it is provided integrally with the door.

According to a second aspect of the present invention, there is provided an air flow path switching device in which a duct case having an air flow path formed therein and a bearing portion is provided, and support shaft portions are provided at both ends of the door body. An air flow path switching door that is rotatably provided in the duct case by being supported by the bearing portion, and an operating point that is separated from the pivot axis of the door outside the duct case. A driving means for applying a rotational driving force to the door and a link means for transmitting the driving force of the driving means to at least one supporting shaft portion of the door are provided. The supporting shaft portion to be transmitted is configured to have a large diameter including the operating point, and the operating point portion of the supporting shaft portion is provided with a transmitting portion to which the driving force of the driving means is transmitted, whereby The function of the link means is added to the shaft. It has a feature where you.

At this time, in each of the air flow path switching devices, the air flow path switching door may be a rotary type door (invention of claim 3) or a butterfly type door ( The invention of claim 4) can be made.
Further, in the air flow path switching device according to claim 2, the transmission portion provided on the support shaft portion may be formed in a pin shape (the invention of claim 5) or a groove shape (claim). (Invention of item 6)

[0011]

According to the air passage switching device of the first aspect of the present invention, the rotational driving force applied from the outside of the duct case by the driving means is applied to the door in the duct case via the link means. By the transmission, the door rotates and the air flow path in the duct case is switched. At this time, since the link means is integrally provided on the door,
It is not necessary to form the link means as a separate component. As a result, it is possible to reduce the number of parts, which leads to cost reduction and assembling.

According to the second aspect of the present invention, there is provided the air flow switching device, wherein the driving means applies the rotational driving force to the operating point outside the duct case, away from the rotational axis of the door. The driving force is transmitted to at least one of the support shaft portions of the door by the link means, so that the door is rotated and the air flow path in the duct case is switched. At this time, the support shaft portion to which the driving force is transmitted is configured to have a large diameter including the operating point, and the transmission portion to which the driving force of the drive means is transmitted is provided to the operating point portion of the supporting shaft portion. Since it is provided, the function of the link means is added to the support shaft portion, so that the support shaft portion can be directly driven. Therefore, it is not necessary to form the link means as a separate component, so that the number of components can be reduced, which in turn can reduce the cost and improve the assemblability.

In this case, the form of the air flow path switching door may be either a rotary type or a butterfly type (the air flow path switching device according to claims 3 and 4).
Further, if the transmission portion provided on the support shaft portion is formed in a pin shape or a groove shape (the air flow path switching device according to claims 5 and 6), it can be driven to the operating point portion of the support shaft portion with a simple structure. The driving force of the means can be transmitted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments in which the present invention is applied to a vehicle air conditioner (car air conditioner) will be described below with reference to FIGS.

(1) First Embodiment First, a first embodiment of the present invention (corresponding to claims 1, 2, 3 and 5) will be described with reference to FIGS. 1 to 4.

FIG. 4 schematically shows the structure of the main body unit 11 of the car air conditioner. Here, the duct case 12
An air blower 13 as an air blower is disposed in the upper right portion in the drawing, and air is sucked into the duct case 12 through an intake side duct (not shown) connected to the duct case 12 and indicated by an arrow. It is designed to blow air in the A direction. At this time, although not shown, the intake duct is provided with an inside air intake port and an outside air intake port, and a switching damper that opens either of them. Further, an evaporator is arranged in the intake side duct. This evaporator functions as a cooling means by operating the refrigeration cycle.

In the duct case 12, a heater core 14 as a heating means is located at the lower right side in the figure.
Is provided. An air mix damper 15 is provided on the upstream side of the heater core 14. The opening of the air mix damper 15 is adjusted according to the set temperature, and of the air blown by the blower 13, the amount of air flowing through the heater core 14 in the direction of arrow B and the arrow C without passing through the heater core 14. It is designed to adjust the amount of airflow flowing in each direction.

In the upper left portion of the duct case 12 in FIG. 4, a plurality of air passage portions, in this case three air passage portions, namely, a foot air passage portion 16 and a face air passage portion 17 are arranged in this order from the left in the clockwise direction. , Defroster air passage 18
Are provided so as to be arranged in an arc shape. Although not shown, the foot air passage portion 16 is in communication with the foot air outlet in the vehicle, the face air passage portion 17 is in communication with the face air outlet, and the defroster air passage portion 18 is in the defroster air outlet. Is in communication with.

In the inner portion of the air passage portions 16, 17 and 18 in the duct case 12, a rotary door 19 in this case which constitutes a part of an air flow path switching device, which will be described in detail later, is provided. Is provided. With this,
When the blower 13 is driven, the inside air or the outside air is sucked from the intake side duct, guided through the evaporator into the duct case 12, and further flows through the duct case 12 as indicated by arrows A, B, and C to set temperature. It is said that And
The cold air or hot air flows into any of the air passage portions 16, 17 and 18 through the door 19 and is blown out from each air outlet in the vehicle. still,
Although detailed description is omitted, it is possible to select the blowing of air from the three air passage portions 16, 17, and 18 in five blowing modes depending on the rotation angle of the door 19.

Next, the air flow path switching device according to this embodiment will be described with reference to FIGS. In the present embodiment, the door 19 is configured by including a film member 21 made of, for example, PET film (75 μm) on the outer peripheral surface of the rotary door body 20 made of plastic, for example. As shown in FIG. 3, the rotary door main body 20 has a so-called vertically split semi-cylindrical shape that integrally includes two substantially semi-circular end plate portions 22 and 22 and an arc-shaped peripheral wall portion 23. I am doing it. And, in the peripheral wall portion 23,
The elastic member 2 is made of elongated urethane foam, which is formed with four axially elongated openings 23a at equal intervals, is located in a rib-shaped portion between them, and extends almost entirely in the axial direction.
4 (see FIGS. 1 and 4) are provided by, for example, adhesion.

The film member 21 is provided on the outer surface of the peripheral wall portion 23 of the rotary door body 20 with the elastic member 24.
Are arranged in an arc shape along an imaginary outer peripheral surface formed by the outer surface, and both ends in the circumferential direction are fixed to the rotary door body 20 by the film retainers 25 (see FIG. 4). At this time, the film member 21 is formed with a ventilation opening 21a at a position corresponding to the second opening 23a from the left in FIG. 4, and the inner and outer peripheral portions of the door 19 are opened at this ventilation opening 21a. It is like this.

As will be described later, the door 19 has a support shaft portion 26 integrally formed with each of the end plate portions 22 and 22.
The circumferential wall portion 23 is pivotally supported on the wall portion of the duct case 12 so that the center of curvature of the arc (rotational axis O) coincides with the center of curvature of the arc surface on which the air passage portions 16, 17, and 18 are lined up. Thus, the duct case 12 is rotatably attached. At this time, the film member 21 is attached to the ventilation port 2
In the parts other than the 1a part, the air passage parts 16, 17,
It is designed to be in contact with the peripheral portion of 18 for sealing.

On the other hand, on the outer surface side of the duct case 12, as shown in FIGS. 1 and 2, the rotational driving force of the door 19 is applied to the operating point P separated from the rotational axis O of the door 19. Control cable 27 as driving means for giving
Is provided. This control cable 27
An intermediate portion thereof is supported by a cable clamp 28 provided on the outer wall portion of the duct case 12, and a base end portion side thereof is connected to a blowout mode switching lever provided on an operation panel (not shown) in the vehicle. As a result, the occupant pushes and pulls the control cable 27 by operating the blowing mode switching lever, and the tip portion of the control cable 27 reciprocates to give a driving force to the operating point P. Is there.

At this time, since the operating point P is separated (eccentric) from the rotation axis O, the link means for transmitting the driving force acting on the operating point P to the door 19 (the support shaft portion 26) is provided. Will be needed. In this embodiment, the support shaft portion 26 is provided with the function of the link means.

That is, the end plate portions 22, 22 of the rotary door body 20 are integrally formed with the support shaft portions 26 located at the center of curvature of the circular arc of the peripheral wall portion 23 and projecting outward in the axial direction. However, one of the supporting shafts 26 (upper side in FIGS. 1 and 3) on the operating side is not formed into a simple thin rod shape, but is formed to have a large diameter including the operating point P. Of. Further, in this embodiment, the support shaft portion 26 is
Only the peripheral wall rises upward in FIG. 1 and is formed in a cylindrical shape having a meat stealing space inside.

As a result, as shown in FIG. 1, the bearing portion 29 provided on the duct case 12 also becomes larger in diameter in accordance with the support shaft portion 26, and thus the support shaft portion 26 is attached to the duct case 12. The bearing portion 29 is rotatably supported so as to penetrate through the inside and outside of the wall portion.

Further, the support shaft portion 26 is integrally provided with a pin 30 as a transmission portion located at the operating point P so as to project upward in FIG. And this pin 30
Further, the tip of the control cable 27 is directly connected. Although not shown in the drawings, the lower support shaft portion in FIGS. 1 and 3 is formed into a round rod shape having a small diameter, and a bearing portion provided on the wall portion on the opposite side of the duct case 12 corresponding to the diameter. It is designed to be rotatably supported by.

In the above structure, when the blowout mode switching lever is operated, the control cable 27 is moved in the pushing / pulling direction, and the pin 30 (operating point P) connected to the tip portion of the control cable 27 moves to the position shown in FIG. The shaft 26 is displaced as shown in FIG. As a result, the door 19 corresponding to the position of the blowout mode switching lever
Is centered on the rotation axis O and is indicated by arrows D and E in FIGS.
The air flow path is switched, that is, the air passage portions 16, 17, 18 are opened and closed.

At this time, as described above, the air flowing in the duct case 12 as indicated by arrows A, B, and C in FIG. 4 along with the driving of the blower 13 reaches the inner peripheral side of the door 19 and the door 1
9 through the second opening 23a of the peripheral wall portion 23 and the ventilation port 21a of the film member 21 wrapped around the second opening 23a to reach the air outlets in the vehicle from the air passage portions 16, 17, and 18. Further, the film member 21 is bulged by the wind pressure so as to bulge toward the outer peripheral side, and the air passage portion 1 to be closed.
The peripheral edges of 6, 17, 18 are pressed against each other to seal.

In FIG. 4, the blowout mode switching lever
The state when the “FACE mode” is selected from the five blowing modes is shown as an example.
The ventilation port 21a of No. 1 overlaps the face air passage portion 17, and the air in the duct case 12 passes through the face air passage portion 17 and is blown out from the face outlet in the vehicle. At this time, the film member 21 receives a force to the outer peripheral side by the wind pressure, presses against the peripheral portions of the other air passage portions 16 and 18, and surely closes the air passage portions 16 and 18 without wind leakage. It has become.

According to this embodiment, the support shaft portion 26 of the door 19 has a large diameter, and the support shaft portion 26 is integrally provided with the pin 30 so that the control cable 27 is directly connected to the pin 30. Therefore, unlike the conventional one in which the driving force of the control cable 9 is transmitted to the door 1 via the link lever 8, the support shaft portion 26 has a function of a link means (link lever). As a result, the support shaft portion 26 can be directly driven, so to speak.

Therefore, the link lever 8 which is a separate component is not required, the number of components can be reduced, and the cost can be reduced and the assemblability can be improved. Further, since there is no play due to the interposition of the link lever 8, the accuracy of the pivot position of the door 19 can be improved.

Further, particularly in the present embodiment, the control cable 2 is provided by the pin 30 formed integrally with the support shaft portion 26.
Since it is connected to 7, it is possible to further simplify the configuration. Furthermore, in this embodiment, unlike the conventional general rotary door, the rotary door body 2
Since the door 19 is a combination of the film member 21 and the film member 21, the peripheral portions of the air passage portions 16, 17 and 18 to be closed can be reliably sealed and wind leakage can be effectively prevented. Further, the frictional force is small, the sliding resistance can be reduced, and the generation of sliding noise can be suppressed.

(2) Second Embodiment FIGS. 5 to 7 show a second embodiment (corresponding to claim 4) of the present invention. This embodiment is different from the first embodiment in that a butterfly type door 31 is adopted as the door. Therefore, since the duct case 12, the control cable 27 and the like are common to the first embodiment, the same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The door 31 has door plate portions 33, 33 integrally formed on the left and right portions of a plastic shaft portion 32 extending in the vertical direction in FIGS. 5 and 6, and these door plate portions 33, 3 are provided.
3, packings 34, 34 are respectively attached to the sheet 3. The upper and lower end portions of the shaft portion 32 have door plate portions 33.
From above and below, and these projecting portions serve as support shaft portions 35 and 36 pivotally supported by the bearing portion 29 of the duct case 12.

At this time, the support shaft portion 36 on the lower end side is the shaft portion 3
2 has a small diameter round bar shape, and the upper end side support shaft portion 35 has a large diameter cylindrical shape including the operating point P, like the support shaft portion 26 of the first embodiment. It is formed in. In addition, again, the operating point P is
And a pin 37 as a transmission unit is integrally provided at
The tip of the control cable 27 is directly connected to the pin 37. In addition, duct case 1
2 has the packing 3 when the door 31 is closed.
Seal guides 38, 38 with which 4, 34 are in close contact are provided.

Also in this structure, similarly to the first embodiment, the support shaft portion 35 of the door 31 is provided with the function of the link means (link lever), so that the support shaft portion 35 is directly connected. Can be driven. Therefore, the link lever 8 which is a separate component is unnecessary, the number of components can be reduced, and the cost can be reduced and the assemblability can be improved. Further, since there is no play due to the interposition of the link lever 8, it is possible to improve the accuracy of the rotational position of the door 31.

(3) Third and Fourth Embodiments FIGS. 8 and 9 show a third embodiment of the present invention, and FIGS. 10 and 11 show a fourth embodiment of the present invention. . The third and fourth embodiments are different from the first embodiment in the driving form of the door.

That is, in the third embodiment shown in FIGS. 8 and 9, the rotary door 41 is provided with the large-diameter support shaft portion 42 which also includes the operating point P. The support shaft portion 42 is supported by the bearing portion 29 of the duct case 12. A groove portion 43, which is located at the operating point P and serves as a transmission portion, is formed on the support shaft portion 42. As shown in FIG. 9, the groove portion 43 is formed so as to extend in a gentle arc shape when viewed from the upper surface.

On the other hand, an attachment shaft 44 is provided on the outer surface of the duct case 12, and the lever 4 is attached to the attachment shaft 44.
An intermediate portion of 5 is rotatably attached. The tip of the control cable 27 is connected to the connection pin 45a provided at one end of the lever 45, and the pin 46 is provided downward at the other end of the lever 45.
Is fitted in the groove 43.

As a result, as the control cable 27 is moved in the pushing / pulling direction, the lever 45 is rotationally displaced to rotate the support shaft portion 42. This makes the door 4
1 is rotationally displaced to switch the air flow path. Even in this case, conventionally, another link lever is required before the lever 45, but the link lever is not necessary and the number of parts can be reduced, resulting in cost reduction and improvement in assembling property. It can be achieved.

In the fourth embodiment shown in FIGS. 10 and 11, the rotary door 51 is provided with the large-diameter support shaft portion 52 which also includes the operating point P, and the duct case 12 is provided. The upper half portion of the support shaft portion 52 protruding upward from the bearing portion 29 has a gear portion 53 formed on the outer peripheral wall portion thereof.

On the other hand, a mounting shaft 54 is provided on the outer surface of the duct case 12, and a drive gear 55 is rotatably mounted on the mounting shaft 54. The tip end of the connecting pin 55a control cable 27 provided on the outer peripheral side upper surface of the drive gear 55 is connected and the drive gear 55 meshes with the gear portion 53 of the support shaft portion 52. is there.

With this, as the control cable 27 is moved in the pushing and pulling direction, the drive gear 55 is rotationally displaced to pivot the support shaft portion 52, whereby the door 51 is pivotally displaced. Then, the air flow path is switched. Also in this case, it is possible to reduce the number of parts, and it is possible to reduce the cost and improve the assemblability.

In each of the above-described embodiments, the control cable 27 which is pushed and pulled by the operation of the blowout mode switching lever by the user is adopted. However, as the driving means, for example, a metal shaft is used, or For example, the door (support shaft portion) may be rotationally displaced by an electrical configuration of a switch and a motor or the like that is driven based on the switch operation. In addition, for example, the present invention can be applied not only to an air conditioner for a vehicle but also to various devices for opening and closing an air flow path, and opening and closing one air passage part,
The present invention may be implemented by appropriately changing it within a range not departing from the gist, such as being applicable to a device that adjusts the opening degree of the air passage portion.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is a vertical cross-sectional view of the main part.

FIG. 2 is a view in the direction of arrow a in FIG.

FIG. 3 is a perspective view of the rotary door body.

FIG. 4 is a vertical side view of a main unit of an air conditioner.

FIG. 5 shows a second embodiment of the present invention and is a perspective view of a butterfly door.

FIG. 6 is a vertical cross-sectional view of the main part

FIG. 7 is a sectional view taken along line bb of FIG.

FIG. 8 is a vertical cross-sectional view of an essential part showing a third embodiment of the present invention.

9 is a view taken in the direction of arrow c in FIG.

FIG. 10 is a vertical cross-sectional view of a main part showing a fourth embodiment of the present invention.

11 is a view on arrow d in FIG.

FIG. 12 shows a conventional example, and is an exploded perspective view of essential parts.

FIG. 13 is a vertical cross-sectional view of the main part

14 is a sectional view taken along the line ee of FIG.

[Explanation of symbols]

In the drawings, 11 is a main unit, 12 is a duct case, and 1
6, 17, 18 are air passage portions, 19, 31, 41, 51
Is a door, 20 is a rotary door body, 21 is a film member, 26, 35, 42 and 52 are support shaft portions, 27 is a control cable, 29 is a bearing portion, 30 and 37 are pins, 43
Indicates a groove.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Uemura 1-1, Showa-cho, Kariya city, Aichi Prefecture Nihon Denso Co., Ltd. (72) Inventor, 1-1, Showa-cho, Kariya city, Aichi prefecture Nidec Within the corporation

Claims (6)

[Claims] 1. A duct case having an air flow path formed therein, an air flow path switching door rotatably provided in the duct case, and a door case provided outside the duct case. An air flow comprising a driving means for providing a dynamic driving force and a link means for transmitting the driving force of the driving means to the door, the link means being integrally provided on the door. Road switching device. 2. A duct case having an air passage formed therein and having a bearing portion, and a support case portion having support shaft portions at both ends of the door body, and the support shaft portions being supported by the bearing portion. An air flow path switching door rotatably provided therein, drive means for applying a rotation driving force of the door to an operating point outside the duct case separated from a rotation axis of the door, and Link means for transmitting the driving force of the driving means to at least one supporting shaft portion of the door, wherein the supporting shaft portion for transmitting the driving force of the driving means includes the operating point. The diameter of the support shaft is increased, and a transmission portion for transmitting the driving force of the drive means is provided at the operating point portion of the support shaft so that the function of the link means is imparted to the support shaft. An air flow path switching device characterized by: 3. The air flow path switching device according to claim 1, wherein the air flow path switching door is a rotary type door. 4. The air flow path switching device according to claim 1, wherein the air flow path switching door is a butterfly type door. 5. The air flow path switching device according to claim 2, wherein the transmission portion provided on the support shaft portion has a pin shape. 6. The air flow path switching device according to claim 2, wherein the transmission portion provided on the support shaft portion is formed in a groove shape.