JP2022116851A - Vehicular air conditioner - Google Patents

Abstract

To inhibit an inclination caused when a slide door is moved in an air-conditioning case at a vehicular air conditioner.SOLUTION: In an air mix door 52 forming a vehicular air conditioner 10, driving force from an actuator 74 is transmitted to one end 52a side as seen in a width direction orthogonal to its moving direction and the other end 52b as seen in the width direction includes a pin member 64 protruding in a direction orthogonal to an extension direction. The pin member 64 is slidably inserted into a second guide groove 44 of a second guide rail 36 in an air-conditioning case 14. The air mix door 52 is formed so that a contact area of the other end 52b as seen in the width direction contacting with the second guide rail 36 is smaller than a contact area of the one end 52a as seen in the width direction contacting with a first guide rail 34.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner that adjusts the temperature of a vehicle interior by blowing into the vehicle interior the air whose temperature has been adjusted by a heat exchanger in an air conditioning case.

BACKGROUND ART Conventionally, there has been known a vehicle air conditioner having a slide door that can open and close an air outlet for blowing air into a vehicle compartment by sliding inside an air conditioning case. The air conditioner has a sliding door having a predetermined length in the width direction. A slide gear is provided along the slide direction on one end side in the width direction that intersects perpendicularly. The air-conditioning case has a shaft that rotates by driving force from a drive means (not shown), and a drive gear provided at the end of the shaft is meshed with a slide gear.

Then, when the operator performs a temperature adjustment operation, the driving means is driven by a control signal output based on this operation, and the shaft and the driving gear rotate in a predetermined direction, and the driving is performed via the slide gear. A slide door meshed with a gear slides along the rail in the width direction and the orthogonal direction to open and close the outlet.

Japanese Patent No. 6575689

In the sliding door as described above, the driving force is transmitted from the driving gear only to one end in the width direction. There is a problem that the movement of the other widthwise end of the door is delayed relative to the one widthwise end of the door, and the slide door tilts in the air conditioning case. If the sliding door is tilted in this way, the air outlet cannot be completely closed even if the sliding door is moved. Since the distance of the sealing surface between the directional end portion and the inner end of the outlet changes, a problem arises in that the desired degree of opening cannot be obtained when the outlet is opened.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicular air conditioner capable of suppressing inclination of a slide door when moving within an air conditioning case.

In order to achieve the above object, an aspect of the present invention is an air-conditioning case having therein a passage through which air circulates; and a sliding door that is slidable in the direction of blocking the air, the sliding door being moved by driving force from the driving means to adjust the opening of the passage,
The sliding door is slidably inserted into the first and second guide grooves at one end in the width direction and the other end in the width direction perpendicular to the moving direction,
A driving force transmission portion for transmitting the driving force from the driving means is formed at one end in the width direction,
A protrusion that contacts the second guide groove is provided on the other end in the width direction,
The contact area of the other widthwise end of the slide door with respect to the second guide groove is smaller than the contact area of one widthwise end of the slide door with respect to the first guide groove.

ADVANTAGE OF THE INVENTION According to this invention, the slide door is provided in the inside of the air-conditioning case which comprises a vehicle air-conditioner so that it can slide along a 1st and 2nd guide groove, and the drive is provided in the width direction one end side of a slide door. A driving force transmission portion to which the driving force from the means is transmitted is formed. A protrusion that contacts the second guide groove is provided on the other widthwise end of the sliding door, and the contact area of the other widthwise end of the sliding door with the second guide groove is reduced by the protrusion to the first guide groove. is formed smaller than the contact area of one end in the width direction of the sliding door.

As a result, when the sliding door moves along the first and second guide grooves in the air conditioning case, the sliding resistance on the other widthwise end side can be suppressed with respect to the widthwise one end side. Even when a driving force is applied to the driving force transmission portion on the one end side and a moment about the one widthwise end side acts, tilting of the air mix door due to the moment can be suppressed appropriately.

According to the present invention, the following effects are obtained.

That is, in the air conditioning case, a sliding door is slidably provided along the first and second guide grooves, and a driving force transmission portion for transmitting driving force from the driving means is formed at one widthwise end of the sliding door. On the other hand, since a protrusion that contacts the second guide groove is provided on the other widthwise end side, the contact area of the other widthwise end of the sliding door with respect to the second guide groove is It can be formed smaller than the contact area of one end of the sliding door in the width direction with respect to the guide groove.

As a result, when the sliding door moves along the first and second guide grooves in the air conditioning case, the sliding resistance at the other widthwise end can be suppressed relative to the one widthwise end. Even if a driving force is applied only to one widthwise end of the air mix door and a moment centering on the one widthwise end is applied, tilting of the air mix door due to the moment can be suitably suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole sectional drawing of the vehicle air conditioner which concerns on embodiment of this invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; 3A is a cross-sectional view taken along line IIIA-IIIA in FIG. 2, and FIG. 3B is an enlarged cross-sectional view showing the vicinity of the other end in the width direction of the air mix door in FIG. 3A. FIG. 3C is a cross-sectional view along line IV-IV of FIG. 3B;

Preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioning case 14 forming air passages 12, an evaporator 16 disposed inside the air conditioning case 14 for cooling the air, and the air and a slide door mechanism 20 for mixing cold air and hot air temperature-controlled by the evaporator 16 and the heater core 18 at a predetermined mixing ratio.

The air conditioning case 14 is composed of first and second split case parts 22 and 24 that can be split in the width direction (directions of arrows A1 and A2 in FIG. 2). and a defroster air outlet 28 which is adjacent to the vent air outlet 26 and which blows air to the vicinity of the front window of the vehicle. A foot air blowing port 30 for blowing air near the feet of the occupant is open on the vehicle rear side of the air conditioning case 14 (in the direction of the arrow B1 in FIG. 1).

Switching doors 32a and 32b for switching the blowing state are provided in the vent blowing port 26, the defroster blowing port 28 and the foot blowing port 30 so as to be openable and closable.

1 to 3A, an air mix door (slide door) 52, which will be described later, is provided on the inner wall surface along the width direction (arrow A direction) of the first and second split case portions 22 and 24. First and second guide rails 34, 36 for guiding are formed. The first and second guide rails 34, 36 protrude inward in the width direction (direction of arrow A1) by a predetermined height with respect to the inner wall surfaces of the first and second split case portions 22, 24, respectively. It is formed in an arc shape corresponding to the trajectory of the door 52 .

The first guide rail (first guide groove) 34 is, for example, a first rail body that is formed to have a substantially rectangular cross section and protrudes to the other side in the width direction (arrow A2 direction) with respect to the inner wall surface of the first split case portion 22. 38 and a first guide groove 40 that opens at the inner end in the width direction of the first rail body 38 and is recessed outward in the width direction (one end side in the width direction). It is formed to have a constant width in a direction orthogonal to the width direction of the air mix door 52 and is formed to be thicker than the plate-shaped air mix door 52 .

2 and 3A, one widthwise end 52a of the air mix door 52 is inserted into the first guide groove 40, and the widthwise one end 52a and the first guide groove 40 are in surface contact. In this state, it is held so as to be slidable in the vertical direction.

As shown in FIGS. 1 to 4, the second guide rail (second guide groove) 36 is formed to have, for example, a substantially rectangular cross section and is positioned on one side ( A second rail body 42 projecting in the direction of arrow A1), and a second guide groove 44 that opens at the inner end in the width direction of the second rail body 42 and recesses outward in the width direction (the other side in the width direction). there is

The second guide groove 44 includes a first groove portion 46 extending in the width direction with a constant width in a direction orthogonal to the width direction of the air mix door 52, and the first groove portion 46 formed substantially in the center of the width direction of the first groove portion 46. It has a second groove portion 48 perpendicular to the first groove portion 46 .

As shown in FIGS. 3A and 3B, the first groove portion 46 is formed to be wider in a direction orthogonal to the width direction of the air mix door 52 than the first guide groove 40 of the first guide rail 34. When the other widthwise end 52b of the air mix door 52 is inserted so as to be substantially parallel to the first groove portion 46, the bottom surface 46a and the ceiling surface 46b of the first groove portion 46 extend from the other widthwise end 52b. It is formed at a spaced apart position.

The second groove portion 48 is recessed with a rectangular cross-section in a direction away from the first groove portion 46 (arrow D1 direction) with respect to the ceiling surface 46b of the first groove portion 46, and similar to the first groove portion 46, It extends with the same cross-sectional shape along the sliding direction of the air mix door 52 . That is, the second guide groove 44 is formed from the first and second groove portions 46 and 48 to have a substantially T-shaped cross section.

The other widthwise end 52b of the air mix door 52 is inserted into the second guide groove 44 and held slidably along the vertical direction (directions of arrows C1 and C2 in FIGS. 2 and 4).

Further, inside the air conditioning case 14, as shown in FIG. 1, an evaporator 16 is provided on the vehicle front side (arrow B2 direction). A heater core 18 is provided with a predetermined interval at the position where The evaporator 16 is provided on the upstream side in the air circulation direction, and the heater core 18 is provided on the downstream side. there is

A sliding door mechanism 20 is provided between the evaporator 16 and the heater core 18 to adjust the amount and condition of the air cooled by the evaporator 16 when the air is circulated downstream in the air conditioning case 14. .

As shown in FIGS. 1 to 4, the sliding door mechanism 20 includes, for example, an air mix door 52 provided slidably upward and downward (in the directions of arrows C1 and C2) inside the air conditioning case 14; and a shaft 56 having a pinion gear 54 for driving and moving the air mix door 52 .

The air mix door 52 includes a door body 58 having an arcuate cross-section curved with a large radius, and a pair of first and second sealing members 60 respectively provided at the upper end and the lower end along the movement direction of the door body 58, 62 and a pair of pin members 64 provided at the other end 52b in the width direction of the door body 58, and gradually move away from the evaporator 16, that is, toward the heater core 18 (arrow B1 direction in FIG. 1). It is formed to have a convex shape and has a predetermined width along the width direction (directions of arrows A1 and A2 in FIG. 2).

One widthwise end 52a and the other widthwise end 52b of the door body 58 are inserted into the first and second guide grooves 40, 44 of the first and second guide rails 34, 36, respectively. and second guide rails 34 and 36, and a rack gear (driving force transmitting portion) 66 is provided along the inner peripheral surface facing the evaporator 16 on one widthwise end 52a side thereof. The rack gear 66 has a plurality of gear teeth protruding radially inward from the inner peripheral surface of the door body 58, and the plurality of gear teeth are located inside the one widthwise end 52a of the door body 58 by a predetermined distance. At the position, it is provided in a straight line along the sliding direction of the air mix door 52 .

As shown in FIGS. 1, 2 and 4, the first and second sealing members 60 and 62 are made of a compressible elastic material such as urethane and have a rectangular cross section and are arranged in the width direction (arrow A direction). , and protruding from the upper and lower ends of the door body 58 toward the heater core 18 (arrow B1 direction in FIG. 1). extending along.

As shown in FIGS. 1 to 4, the pin member 64 is made of, for example, a shaft having a circular cross section, and is perpendicular to the extending direction of the door body 58 with respect to the other widthwise end 52b of the door body 58. , and provided at one end and the other end along the moving direction of the door body 58 (see FIG. 4). That is, the pin member 64 protrudes so as to be substantially perpendicular to the inner and outer peripheral surfaces of the door body 58 .

The pin member 64 includes a first protrusion (protrusion) 70 protruding from the outer peripheral surface of the door body 58 and a second protrusion (protrusion) 72 protruding from the inner peripheral surface of the door body 58. The first protrusion 70 and the second protrusion 72 are formed in a straight line with the door body 58 interposed therebetween, and as shown in FIG. 3B, the second protrusion 72 The length L2 of protrusion along the axial direction of the first protrusion 70 is longer than the length L1 of protrusion along the axial direction of the first protrusion 70 (L2>L1).

3B, the pin member 64 is inserted into the second guide groove 44 of the second guide rail 36 together with the other widthwise end 52b of the door body 58, and the tip of the first projection 70 is The second protrusion 72 protrudes in the direction of arrow D2 and slides on the bottom surface 46a of the first groove 46, and the second protrusion 72 protrudes in the direction of arrow D1, is inserted into the second groove 48, and slides on the upper surface 48a. As a result, the other widthwise end 52b of the door body 58 is inserted through the first groove portion 46 of the second guide groove 44, and the pair of pin members 64 are inserted through the first and second groove portions 46, 48. In this state, it is movably supported along the second guide rail 36 .

At this time, the other widthwise end 52b of the air mix door 52 does not contact the door body 58 with the second guide groove 44, and the pair of pin members 64 Since the air mix door 52 is supported in contact with the upper surface 48 a of the first guide groove 40 , the contact area is smaller than that of the widthwise one end 52 a of the air mix door 52 that is in surface contact with the first guide groove 40 . For example, the first and second protrusions 70 and 72 that constitute the pin member 64 are in point contact with the second guide groove 44 at their tips.

The shaft 56 is rotatably supported by the side wall of the first split case portion 22, and the pinion gear 54 is integrally provided at the tip thereof. The pinion gear 54 has gear teeth formed on its outer peripheral surface and meshes with the rack gear 66 of the air mix door 52 .

An actuator (driving means) 74 provided on the outside of the air conditioning case 14 (first split case portion 22) shown in FIG. The air mix door 52 slides vertically (in the directions of arrows C1 and C2) along the first and second guide rails 34 and 36 under the meshing action of the gear 54 and the rack gear 66 .

For example, when the air mix door 52 moves upward (in the direction of arrow C1), the first sealing member 60 contacts the first sealing wall 76 of the air conditioning case 14, and the second sealing member 62 holds the heater core 18. The first opening 78 between the holder 77 and the first seal wall 76 is closed by abutting against the holder 77 .

On the other hand, when the air mix door 52 moves downward (in the direction of arrow C2), the first sealing member 60 contacts the holder 77, and the second sealing member 62 contacts the second sealing wall 80 of the air conditioning case 14. When they come into contact with each other, they are sealed, and the second opening 82 between the holder 77 and the second seal wall 80 is closed.

The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above, and the operation and effects thereof will now be described.

First, a case of performing a heating operation in which warm air is blown into the passenger compartment will be described. The actuator 74 is driven under the operation action of an occupant (not shown), and accordingly the shaft 56 and the pinion gear 54 rotate counterclockwise (see FIG. 1), and the air mix door 52 moves along the first and second guide rails 34. , 36 upward (in the direction of arrow C1) by a predetermined distance.

At this time, the driving force from the shaft 56 and the pinion gear 54 is applied only to the widthwise one end 52a side (arrow A1 direction) of the air mix door 52 via the meshed rack gear 66, so that the pinion gear 54 and the rack gear A clockwise moment force M1 acts on the air mix door 52 about a base point P (see FIG. 2) where the door 66 is meshed.

Even if such a moment force M1 acts on the air mix door 52, the pair of pin members 64 provided at the other widthwise end 52b of the air mix door 52 will not act as the second guide of the second guide rail 36. When the pin member 64 is inserted into the groove 44 and comes into contact with the bottom surface 46a of the first groove portion 46 and the top surface 48a of the second groove portion 48, the widthwise other end 52b (pin member 64) with respect to the second guide groove 44 is smaller than the contact area of the widthwise one end 52 a with respect to the first guide groove 40 .

Therefore, when the air mix door 52 slides, the sliding resistance on the side of the other widthwise end 52b can be suppressed against the sliding resistance on the side of the one widthwise end 52a. Rotation (inclination) of the air mix door 52 about the center is suppressed.

The air mix door 52, whose inclination within the air conditioning case 14 is thus suppressed, rises under the guidance of the first and second guide rails 34, 36, and the first sealing member 60 moves toward the first sealing wall 76. By contacting and compressing the first sealing member 60 and the first sealing wall 76, a gap is not formed between the first sealing member 60 and the first sealing wall 76, and sealing can be performed reliably. Also, the second seal member 62 of the air mix door 52 is sealed by coming into contact with the holder 77 . As a result, the air mix door 52 is positioned upward in the air conditioning case 14 , and the downstream side of the evaporator 16 communicates only with the heater core 18 through the second opening 82 .

Air supplied from a blower (not shown) to the upstream side of the air conditioning case 14 through the supply port 50 is cooled by passing through the evaporator 16, and then passes through the heater core 18 through the opened second opening 82. The hot air is heated by the heat source and is blown from the foot air outlet 30 to the vicinity of the feet of the occupant, for example.

Next, a description will be given of a case in which cooling operation is performed in which cool air is blown into the passenger compartment. The actuator 74 (not shown) is driven under the operation action of an occupant (not shown), the shaft 56 and the pinion gear 54 are accordingly rotated clockwise (see FIG. 1), and the air mix door 52 moves along the first and second guide rails. It slides downward (in the direction of arrow C2) along 34 and 36 by a predetermined distance.

At this time, the driving force from the shaft 56 and the pinion gear 54 is applied only to the widthwise one end 52a side (arrow A1 direction) of the air mix door 52 via the meshed rack gear 66, so that the pinion gear 54 and the rack gear A counterclockwise moment force M2 is generated on the air mix door 52 about a base point P (see FIG. 2) where the door 66 is meshed.

Even if such a moment force M2 acts on the air mix door 52, the pair of pin members 64 provided at the other widthwise end 52b of the air mix door 52 will not act as the second guide of the second guide rail 36. When the pin member 64 is inserted into the groove 44 and contacts the bottom surface 46 a of the first groove portion 46 and the top surface 48 a of the second groove portion 48 , the width direction other end 52 b (pin member 64 ) contacts the second guide groove 44 . The area is smaller than the contact area of the widthwise one end 52 a with respect to the first guide groove 40 .

Therefore, when the air mix door 52 slides, the sliding resistance on the side of the other widthwise end 52b can be suppressed against the sliding resistance on the side of the one widthwise end 52a. Rotation (inclination) of the air mix door 52 about the base point P is suppressed.

The air mix door 52, whose inclination within the air conditioning case 14 is thus suppressed, descends under the guidance of the first and second guide rails 34, 36, and the second sealing member 62 moves toward the second sealing wall 80. By contacting and compressing the second sealing member 62 and the second sealing wall 80, a gap is not formed between the second sealing member 62 and the second sealing wall 80, and sealing is performed reliably. Also, the first seal member 60 of the air mix door 52 is sealed by coming into contact with the holder 77 .

As a result, the air mix door 52 is positioned downward (in the direction of the arrow C2) in the air conditioning case 14, and the communication with the heater core 18 through the second opening 82 on the downstream side of the evaporator 16 is blocked. Air supplied from a blower (not shown) to the upstream side of the air-conditioning case 14 through the supply port 50 is cooled by passing through the evaporator 16, and then bypasses the heater core 18 through the first opening 78 in the passage 12. The cool air is blown from the vent blowing port 26 to the vicinity of the face of the occupant.

As described above, in the vehicle air conditioner 10 according to the present embodiment, the inside of the air conditioning case 14 having the passage 12 slides along the first and second guide rails 34 and 36 provided on the inner wall. An air mix door 52 is freely provided, and a pinion gear 54 of a shaft 56 that rotates under the driving action of an actuator 74 is meshed with a rack gear 66 provided on one widthwise end 52a side of the air mix door 52 . A pair of pin members 64 orthogonal to the extending direction of the door body 58 are provided at the other widthwise end 52b of the air mix door 52, and the pin members 64 are the second widthwise end 52b through which the other widthwise end 52b is inserted. 2 By being slidably inserted into the guide groove 44, the width direction one end 52a side of the air mix door 52 with respect to the first guide rail 34 contacts the width direction other end 52b side with respect to the second guide rail 36. Area can be reduced.

Therefore, when the air mix door 52 slides along the first and second guide rails 34, 36 in the air conditioning case 14, the driving force is applied only from the widthwise one end 52a side ( Even when the moment forces M1 and M2 around the reference point P) act, the sliding resistance on the side of the other widthwise end 52b is suppressed with respect to the sliding resistance on the side of the one widthwise end 52a. Rotation (inclination) of the air mix door 52 caused by the forces M1 and M2 can be preferably suppressed.

As a result, in the vehicle air conditioner 10, the air mix door 52 is slid to reliably contact the first and second seal walls 76, 80 to close the first and second openings 78, 82. In addition, on the open side, the first and second openings 78, 82 can be opened at a desired degree of opening.

It should be noted that the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and it goes without saying that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10... Vehicle air conditioner 14... Air-conditioning case 20... Slide door mechanism 34... 1st guide rail 36... 2nd guide rail 40... 1st guide groove 44... 2nd guide groove 46... 1st groove part 48... 2nd groove part 52 ... air mix door 64 ... pin member 70 ... first protrusion 72 ... second protrusion

Claims (1)

An air-conditioning case having therein a passage through which air circulates, and a sliding door provided slidably in a direction blocking the passage along a pair of first and second guide grooves provided on the inner wall of the air-conditioning case. and adjusting the degree of opening of the opening of the passage by moving the sliding door by a driving force from a driving means,
one end in the width direction and the other end in the width direction perpendicular to the moving direction of the sliding door are slidably inserted into the first and second guide grooves, respectively;
A driving force transmission portion for transmitting a driving force from the driving means is formed at one end in the width direction,
A protrusion that contacts the second guide groove is provided on the other end in the width direction,
A vehicle air conditioner, wherein a contact area of the other end in the width direction of the slide door with respect to the second guide groove is smaller than a contact area of one end in the width direction of the slide door with the first guide groove.

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