JPH10230732A - Air-conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the condition to generate a looseness at the winding starting position of a membranous member, when the membranous member is wound by a winding shaft, as well as to make the connecting condition between the membranous member and the winding shaft solid, and furthermore, to realize the improvement of the reliability of the service life, and the improvement of the manufacturing workability, at a time. SOLUTION: While a winding shaft 20 is formed in a cylindrical surface form at its outer peripheral surface, it has a shaft main body 31 and a film presser 32 in the form divided into two parts by a plane parallel to the center axial direction and decentered from the center axis, and by integrating the shaft main body 31 and the film presser 32 in the condition holding the end of a film damper 25, both members are connected to the end of the film damper 25. The shaft main body 31 and the film presser 32 are connected by engaging the engaging claw 32b at the film presser 32 side to the engaging hole 31b at the shaft main body 31 side.

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 the degree of opening of an air passage formed in a duct is adjusted by using a film-like member. The present invention relates to a vehicle air conditioner provided with a pair of winding shafts for selectively moving in a forward / reverse direction.

[0002]

2. Description of the Related Art In recent years, in air conditioners for automobiles, an air outlet switching damper or an air mix damper has been constructed as a film damper using a film-like member made of a flexible material such as a plastic film. Attempts have been made to reduce the overall size and simplify the structure.
In an air conditioner for a vehicle having such a configuration, conventionally, it has been considered that a film damper is arranged in a duct in a state of being stretched between a pair of winding shafts to save space. I have. In this case, both ends of the film damper are connected to the respective winding shafts whose outer peripheral surfaces are formed in a cylindrical shape, and the pulleys directly connected to the respective winding shafts are connected to each other by a wire as a power transmission means. By rotating the take-up shaft via a wire and a pulley, a configuration is adopted in which the film damper is selectively moved in the forward and reverse directions.

[0003]

When the above-described film damper is used, it is necessary to make the connection between the film damper and the winding shaft strong. Further, since the film damper has a certain degree of rigidity, it is necessary to prevent the looseness due to the rigidity from occurring at the winding start position when the film damper is wound by the winding shaft. In other words, in order to prevent such loosening, the film damper is prevented from rising as much as possible from the outer peripheral surface of the winding shaft at the connection portion (the winding start portion of the film damper) between the film damper and the winding shaft. Is desirable.

In order to suppress such floating,
As a connecting means between the film damper and the winding shaft, for example, it is conceivable to employ a means for bonding the edge of the film damper along the outer peripheral surface of the winding shaft. However, with such a connecting means, there is a possibility that the bonding strength of the adhesive may be insufficient, and the connecting strength between the film damper and the winding shaft may be insufficient, and the reliability with respect to the service life may be reduced. There is a problem that the bonding process itself is relatively troublesome, and thus the manufacturing workability deteriorates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a film-like member for changing an opening degree of an air passage and windings connected to both ends of the film-like member. The connection state between the film-shaped member and the take-up shaft can be strengthened, and when the film-like member is wound by the take-up shaft, loosening can be suppressed at the winding start position of the film-like member. It is an object of the present invention to provide an air conditioner for a vehicle that can simultaneously improve the reliability of the vehicle and the manufacturing workability.

[0006]

Means for Solving the Problems In order to achieve the above object, means as described in claim 1 can be employed. According to this means, the winding shaft is constituted by the first and second shaft portions having a shape divided into two by a plane parallel to the center axis direction, and the first and second shaft portions are formed by By integrating the end portion of the film-like member sandwiched between them, the connection between the winding shaft and the film-like member is performed,
The connection state can be strengthened.

In this case, since the first and second shaft portions are divided by a plane eccentric from the center axis of the winding shaft, the film-like member is bent from the sandwiched portion as described above. When it is made to be along the outer peripheral surface of the winding shaft, the bending angle can be relatively increased. In other words, when the film-shaped member is pulled out from the sandwiched portion and brought into a state along the outer peripheral surface of the winding shaft, the cylindrical outer peripheral surface of the winding shaft constituted by the first and second shaft portions is provided. Of the above, if the pullout is performed along the outer peripheral surface on the side of the shaft portion divided so that the central axis passes, the bending angle described above can be relatively increased. Such a bending angle, when the outer peripheral surface of the winding shaft has a cylindrical surface shape,
The larger the position of the plane that divides the first and second shaft portions is set at a position farther from the center axis of the winding shaft, the larger the bending angle is set.
Even when the film-like member has a certain degree of rigidity, a connection portion between the film-like member and the winding shaft (a winding start portion of the film-like member)
In this case, the force of the film-like member trying to rise from the outer peripheral surface of the winding shaft can be suppressed. As a result, when the film-like member is wound by the winding shaft, it is possible to suppress a situation in which the film-like member is loosened at the winding start position.

Further, unlike the case where an adhesive means is employed as a connecting means between the film-shaped member and the winding shaft, there is no possibility that the connection strength between the film-shaped member and the winding shaft becomes insufficient. In addition, the reliability with respect to the service life is improved, and a relatively troublesome bonding step is not required.

In the case where the means as described in claim 2 is adopted, the engagement hole provided in one of the first and second shaft portions is inserted into the other shaft portion. It is possible to form a winding shaft in which the first and second shaft portions are integrated only by engaging the engaging claws provided on the portion. The step of connecting the shape member and the winding shaft) can be easily performed, and the manufacturing workability is further improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows the entire configuration of the vehicle air conditioner in an exploded state, and FIG. 5 shows the entire configuration of the same device in an assembled state (however, FIG. 4 is a perspective view, and FIG. Is a side view as viewed from the opposite side).

In FIGS. 4 and 5, the main duct 1
Is a two-split type combining an upper case 2 and a lower case 3, and has a blower 4 (FIG. 4) that introduces air through an outside air suction port 4 a and an inside air suction port 4 b, 4 b at the most upstream portion thereof.
Reference). An evaporator 5 for cooling the air blown by the blower 4 is disposed downstream of the blower 4 in the main duct 1. Although not shown, the blower 4 is provided with a damper for switching between inside and outside air so as to correspond to the outside air suction port 4a and the inside air suction port 4b.

At the most downstream part of the main duct 1, there are provided air outlets 6a, 6b, 6c for blowing air to three face outlets (not shown) on the left, right and center of the front seat. A branch duct 6 is attached, and an air outlet 7 for blowing air to a foot outlet (not shown) of the front seat.
A foot differential duct 7 having a blower port 7c for blowing air to a, 7b and a defroster outlet (not shown) is attached.

The branch duct 6 and the foot differential duct 7
Each of the connecting portions with the main duct 1 is formed with a plurality of ventilation ports 8 and 9 (see FIG. 4) communicating with the inside of the main duct 1, respectively. In addition, these ventilation holes 8,
Reference numeral 9 corresponds to the air passage section according to the present invention.

An assembly unit 10 which can be integrally attached to and detached from the main duct 1 is disposed at a position downstream of the evaporator 5 at the center of the main duct 1. Hereinafter, this assembly unit will be described. 10
Will be described with reference to FIGS. 1 to 3 and FIGS. 6 to 8.

As shown in FIG. 6, the frame 11 constituting the skeleton of the assembly unit 10 includes left and right end plates 12, 1
3 are integrally connected by a connecting plate 14 having a substantially V-shaped vertical cross-section, and the upper surface thereof is opened so as to face the ventilation holes 8 and 9 of the branch duct 6 and the foot differential duct 7. It has been done. A plurality of ventilation holes 15 and 16 are formed in the front part (the part located on the upstream side of the main duct 1) and the rear part of the connection plate 14, respectively.

A rectangular opening 12x is formed in one end plate 12 of the frame 11, and the heater core 17 is accommodated in the frame 11 through the opening 12x. I have. The other end plate 13 of the frame 11 is formed so as to protrude outward from the holding portion 13x into which the end of the heater core 17 is inserted.

In this case, the heater core 17 is connected to the connecting plate 14.
Are arranged in parallel with each other in a state close to the front surface (that is, the upstream side). The frame 11 is connected to the connecting plate 1.
4 shows a state in which the front part is slightly inclined with respect to the evaporator 5 (the state in which the upper part is inclined to the evaporator 5 side), and there is a predetermined gap between the lower end part and the inner bottom part of the main duct 1. It is arranged in.

As a result of this arrangement, the heater cores 17 are slightly inclined with respect to the evaporator 5 and are provided in a positional relationship such that there is a predetermined gap between the heater core 17 and the inner bottom of the main duct 1. . This allows the air cooled by the evaporator 5 to flow through the ventilation port 15 and the heater core 1.
An air mix ventilation passage (indicated by a dashed arrow 18 in FIG. 5) flowing into the frame 11 through the air passage 7 and a bypass ventilation passage through which the cooling air flows into the frame 11 through the ventilation opening 16 (dashed line in FIG. 5). (Indicated by an arrow 19). The ventilation port 15 corresponding to the air mixing ventilation path 18 and the ventilation port 16 corresponding to the bypass ventilation path 19 are:
Each of them corresponds to the air passage section in the present invention.

The end plates 12 and 13 of the frame 11 are provided with bearing bushes 20a at both ends of a total of four winding shafts 20 to 23.
Notches 12a to 12d and 13a to 13d for supporting through the through rollers 23a and 20b to 23b, and through holes 12e and 1 for directly supporting both ends of the guide roller 24.
3e is formed.

In this case, the pair of winding shafts 20 and 21 are connected to both ends of a film damper 25 (a specific shape thereof will be described later) as a film-shaped member for switching a blowing mode. The one winding shaft 20 is provided at a position facing the lower end of the ventilation opening 8 of the branch duct 6, and the other winding shaft 21 is connected to the lower end of the ventilation opening 9 of the foot differential duct 7. It is provided at the position facing. The guide roller 24 guides the film damper 25 in a state of being bent in a V-shape, and is provided at an intermediate position between the upper ends of the ventilation openings 8 and 9. As a result, the film damper 25 is stretched so as to face the ventilation ports 8 and 9.

On the other hand, a pair of winding shafts 22 and 23 are provided with a film damper 26 for air mixing as a film-like member.
Both ends of the winding shaft 22 are connected to each other at a position facing the upper end of the ventilation port 15 formed on the front surface of the connecting plate 14. The other winding shaft 23 is provided at a position facing the upper end of the ventilation port 16 formed on the rear surface of the connecting plate 14. Thereby, the film damper 26 is connected to the connecting plate 1.
4 and is bent in a V-shape, and
It will be bridged in the state facing 5 and 16.

At one end of each of the winding shafts 20 to 23, pulleys 20c to 23c are attached in a non-rotating state.
Wires 27 and 28 as power transmission means are stretched between 3c. In addition, at each other end of the winding shafts 20 and 23,
The rotating shafts of the motors 29 and 30 as the rotation driving means in the present invention are connected. In this case, the motors 29, 3
In response to the rotation of the winding shafts 20 and 23 by the forward and reverse rotation of 0, the winding shafts 21 and 22 are also synchronously rotated via the wires 27 and 28.
The film dampers 25 and 26 can be reciprocated in accordance with the forward and reverse rotations of.

When the motors 29, 30 are constituted by step motors, the film dampers 25, 26
It is possible to perform feedforward control of the amount of movement of the film, but when the motors 29 and 30 are constituted by ordinary DC motors or ultrasonic motors, the movement positions of the film dampers 25 and 26 are detected. It is necessary to provide a position detecting means, and to feedback-control the moving amounts of the film dampers 25 and 26 based on the output of the position detecting means. In this case, as the position detecting means, a combination of an optical sensor and a through hole or an opaque mark portion provided on the film damper 25 or 26 side, or a bar code, a magnetic sensor and a combination provided on the film damper 25 or 26 side are provided. Various combinations such as a combination with a magnetic material, a combination of an ultrasonic sensor or a limit switch and a through hole provided in the film dampers 25 and 26 are conceivable.

As described above, the winding shaft 20 provided with the heater core 17 and the pulleys 20c to 23c is attached to the frame body 11.
~ 23, guide roller 24, film damper 25,2
6, the assembly unit 10 is configured by attaching the wires 27 and 28, the motors 29 and 30, and the like.
The specific configuration of 26 will be described.

The film dampers 25 and 26 are made of a flexible polyester resin, PPS (polyphenylene sulfide), or the like, and have a rectangular shape, and have the shapes shown in FIGS. 7 and 8, respectively.

The film damper 25 for switching the air blowing mode shown in FIG. 7 has a plurality of openings 25a which are selectively opposed to the air vents 8 and 9, respectively, and adjust their opening degrees.
And 25b, and a plurality of positioning holes 25c and mounting holes 25d at both ends. The film damper 26 for air mix shown in FIG.
5 and 16, each of which has a plurality of openings 26a and 26b for selectively adjusting the degree of opening thereof, and a plurality of positioning holes 26c and mounting holes 26d alternately provided at both ends. Have in the arrangement.

In the following, these film dampers 2
The connection structure of the winding shafts 5 and 26 to the winding shafts 20 to 23 will be described. Since the connection structures are the same, the connection structure between the film damper 25 and the winding shaft 20 will be described as an example.

1 to 3, the winding shaft 20 has an outer peripheral surface formed into a cylindrical shape.
1 (corresponding to the first shaft portion in the present invention) and the film presser 3
2 (corresponding to the second shaft portion in the present invention). In this case, the shaft main body 31 and the film retainer 32 have a shape that is divided into two by a plane parallel to the center axis direction of the winding shaft 20, particularly, a plane eccentric from the center axis.

A film damper 2 is provided on the shaft main body 31 side.
5, a plurality of positioning projections 31a fitted into the positioning holes 25c and a plurality of engaging holes 31b having an engaging step therein are formed alternately. Further, on the side of the film presser 32, a plurality of holes 32a to be fitted with the positioning projections 31a and the engaging holes 31b through the mounting holes 25d of the film damper 25 are inserted into the engaging holes 31b to prevent the film from being pulled out. A plurality of engaging claws 32b to be engaged in the state are formed. Then, the shaft main body 31 and the film presser 3
2, the winding shaft 20 is integrally formed in accordance with the engagement of the engagement hole 31b and the engagement claw 32b.

Here, as shown in FIG. 3 showing the cross-sectional structure of the winding shaft 20, the film damper 25 is connected to the shaft main body 31.
When it is pulled out from the portion sandwiched by the film retainer 32 and is set along the outer peripheral surface of the winding shaft 20, the cylindrical outer peripheral surface of the winding shaft 20 formed by the shaft main body 31 and the film retainer 32. Of these, the winding shaft 20 is pulled out along the outer peripheral surface on the side of the shaft main body 31 which is divided so that the center axis of the winding shaft 20 passes therethrough.

In the above embodiment, the winding shaft 20
Is constituted by a shaft main body 31 and a film retainer 32 having a shape divided into two by a plane parallel to the center axis direction, and the end of the film damper 25 is sandwiched between the shaft main body 31 and the film retainer 32. The connection between the take-up shaft 20 and the film damper 25 is performed by integrating them in a folded state, so that the connection state can be strengthened.

In this case, the shaft main body 3 constituting the winding shaft 20
1 and the film retainer 32 are divided by a plane eccentric from the center axis of the winding shaft 20, so that the film damper 25 is bent from the sandwiched portion as described above, and the outer periphery of the winding shaft 20 is formed. When it is set along the surface, the bending angle can be relatively increased. That is, as in the present embodiment, when the film damper 25 is pulled out from the sandwiched portion and is brought into a state along the outer peripheral surface of the winding shaft 20, the winding shaft constituted by the shaft main body 31 and the film retainer 32 is provided. If the outer peripheral surface of the cylindrical surface 20 is drawn along the outer peripheral surface on the side of the shaft main body 31 which is divided so that the center axis of the winding shaft 20 passes, the above-described bending The angle can be relatively large.

When the winding shaft 20 has a cylindrical outer peripheral surface, the bending angle is limited to the shaft body 31 and the film holder 3.
When the bending angle is set to a large value, the film damper 25 has a certain rigidity. Even in the case where the film damper 25 is provided, the force at which the film damper 25 tends to float up from the outer peripheral surface of the winding shaft 20 is suppressed at the connection portion (the winding start portion of the film damper 25) between the film damper 25 and the winding shaft 20. You can do it. As a result, when the film damper 25 is wound by the winding shaft 20, it is possible to suppress a situation in which the film damper 25 becomes loose at the winding start position.

By the way, as shown in FIG. 9, the winding shaft 20 '
Is divided into a shaft main body 31 ′ and a film retainer 32 ′ in a plane passing through the central axis thereof, the film damper 25 is bent from a portion sandwiched between the shaft main body 31 ′ and the film retainer 32 ′ to take up the winding shaft 20. ', The bending angle becomes relatively small when it is set along the outer peripheral surface of'. For this reason, as shown in FIG.
In the case where the film damper 5 has a certain degree of rigidity, the film damper 25 is largely lifted from the outer peripheral surface of the winding shaft 20 ′ at the winding start portion of the film damper 25. When the film is wound by the winding shaft 20 ', the film damper 25 may be loosened at the winding start position.

Further, according to the structure of the present embodiment, the connection strength between the film damper 25 and the winding shaft 20 is not likely to be insufficient as in the case of using the bonding means for the connection. The reliability with respect to the service life is improved, and a relatively troublesome bonding step is not required, and the workability in manufacturing is improved.

In addition, the film damper 25 and the winding shaft 20
When connecting the film damper 25, the film damper 25 is sandwiched between the shaft main body 31 and the film retainer 32, and the engaging claw provided on the film retainer 32 is engaged with the engaging hole 31b provided in the shaft main body 31. Since it is only necessary to engage the 32b, the process for the connection can be easily performed, and the manufacturing workability is further improved.

In this case, since the other winding shafts 21 to 23 have the same structure, the connection between the winding shafts 21 to 23 and the film dampers 25 and 26 corresponding thereto is similarly strong. It can contribute to obtaining the above-mentioned various effects such as the state.

In the above embodiment, each of the film dampers 25 and 26 may be divided into two along the moving direction, and the movement of each of the divided film dampers may be controlled independently. Further, in the above embodiment, the assembly unit 10 includes the heater core 17, but the assembly unit may include at least the winding shafts 20 to 23, the film dampers 25, 26, and the wires 27, 28. . Further, the winding shafts 20 to 23 may be configured to be driven by motors corresponding to each other one by one, and in this case, the wires 27 and 28 become unnecessary.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an essential part of a winding shaft and a film damper in an exploded state for explaining one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of a winding shaft and a film damper in an assembled state.

FIG. 3 is a cross-sectional view of a main part in an assembled state.

FIG. 4 is an exploded perspective view of the whole.

FIG. 5 is an overall side view showing the assembled state.

FIG. 6 is a perspective view showing the disassembled state of the assembly unit.

FIG. 7 is a front view of a film damper for switching a blowing mode.

FIG. 8 is a front view of a film damper for air mixing.

FIG. 9 is a longitudinal sectional view of a structural example for explaining the effect of one embodiment of the present invention.

[Explanation of symbols]

1 is a main duct, 4 is a blower, 5 is an evaporator, 6 is a branch duct, 7 is a foot differential duct, 8 and 9 are ventilation holes (air passage portions), 10 is an assembly unit, 11 is a frame body, and 12 and 13 are End plates, 14 are connecting plates, 15 and 16 are ventilation holes (air passage portions), 17 is a heater core, 20 to 23 are winding shafts, 25 and 26 are film dampers (film members), 2
7, 28 are wires, 29 and 30 are motors (rotation driving means), 31 is a shaft main body (first shaft portion), 31b is an engagement hole,
Reference numeral 32 denotes a film presser (second shaft), and 32b denotes an engagement claw.

Claims (2)

[Claims] 1. A duct in which an air passage is formed, a film member movably provided in the duct, and a degree of opening of the air passage which is changed in accordance with the movement, and both ends of the film member A vehicle air conditioner including a pair of winding shafts that are connected and selectively move the film-like member in the forward and reverse directions according to the rotation of the winding member, and rotation driving means for driving these winding shafts. The winding shaft has a first shaft portion and a second shaft portion whose outer peripheral surface is formed in a cylindrical shape and is divided into two by a plane parallel to the center axis direction, The first and second shafts are integrated with the end of the film member sandwiched therebetween so as to be connected to the end of the film member. The shaft portion has a shape divided by a plane eccentric from the center axis of the winding shaft. Air conditioning system, characterized and. 2. The method according to claim 1, wherein the first and second shafts are integrated by engaging an engagement hole provided on one shaft with an engagement claw provided on the other shaft. Claim 1.
An air conditioner for a vehicle as described in the above.