JP2020131776A - Vehicular air conditioner - Google Patents

Abstract

To improve durability by suppressing peeling of a seal member from a door in a vehicular air conditioner.SOLUTION: In a vehicular air conditioner 10, first seal members 64 are provided in vertically sliding first and second air mixing doors 46, 48, and first inclination parts 40a, 40b inclined from both ends in the width direction toward a center in the width direction are formed on first seal walls 36a, 36b of an air-conditioning case 12 with which the first seal members 64 come into sliding contact. At both ends in the width direction of the first seal walls 36a, 36b, separation distances from the first and second air mixing doors 46, 48 are formed to be the smallest. Movement in the width direction of the first and second air mixing doors 46, 48 is restricted by the first inclination parts 40a, 40b of the first seal walls 36a, 36b, so as to prevent peeling of the first seal members 64.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle air conditioner using a seal member for a door for opening and closing a passage.

Conventionally, in a vehicle air conditioner mounted on a vehicle, a switching door for switching the flow state of air flowing through a passage in the air conditioning case has been used, and such a switching door has a sealing surface of the air conditioner case. A sealing material such as urethane foam is provided on the abutting surface to be abutted, and when the switching door rotates, the sealing material is compressed and moved while sliding with respect to the sealing surface of the air conditioning case.

Since a sealing material such as urethane foam sinks greatly in the thickness direction when it comes into contact with the sealing surface, the sliding resistance increases when the switching door moves by that amount, and the sealing There is a problem that abnormal noise is likely to occur when the material is slid while being compressed.

Therefore, in order to solve the above-mentioned problems, for example, in the vehicle air conditioner disclosed in Patent Document 1, an elastic packing material made of urethane foam or the like is curvedly attached to the surface of the blowout mode door which is a rotary door. At the same time, a mesh-like skin material is attached to the surface of the elastic packing material.

When the blowout mode door slides along the seal surface of the air conditioning case, the rib portion slides into contact with the seal surface to reduce the sliding resistance and suppress the generation of abnormal noise.

Japanese Unexamined Patent Publication No. 2014-151672

In the vehicle air conditioner according to Patent Document 1 described above, the rib portion of the skin material in which a resin material such as nylon resin is woven into a mesh shape is adhered or welded to the surface of an elastic packing material made of urethane foam or the like. There is. However, since the rib portion has a mesh shape, the contact area with the elastic packing material is reduced, and the adhesive force is weakened accordingly, so that the sliding with the sealing surface is caused by the opening / closing operation of the blowout mode door. There is a concern that the skin material may be peeled off from the elastic packing material as it is repeated.

Further, when the blowout mode door is rattling in the axial direction of the rotation axis due to a manufacturing error of the air conditioning case or the like, the blowout mode door moves in the axial direction, and the elastic packing serves as a sealing material. There is a problem that a force in the axial direction is applied to the material and peeling is promoted.

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide an air conditioner for a vehicle capable of improving durability by suppressing peeling of a seal member with respect to a door. ..

In order to achieve the above object, the aspect of the present invention is a case having a passage through which air flows inside, a case seal surface formed around an opening in the case, and sliding in contact with the case seal surface. In a vehicle air conditioner having a door having a door seal surface that opens and closes an opening by moving and a drive shaft for driving the door.
On the case seal surface, the separation distance of the drive shaft with respect to the axis changes along the extending direction of the axis.

According to the present invention, a case constituting a vehicle air conditioner is provided with a case seal surface around an opening formed inside, and a door seal surface that opens and closes the opening by contacting the case seal surface is provided. The case seal surface is formed so that the separation distance of the drive shaft for driving the door from the axis is changed along the extending direction of the axis.

Therefore, by forming the case seal surface so as to change the separation distance of the drive shaft from the axis, it is possible to regulate the movement of the door in the axial direction with respect to the case. As a result, it is possible to suitably prevent the door seal surface from peeling off when the door moves in the axial direction of the drive shaft, and the durability can be improved accordingly.

According to the present invention, the following effects can be obtained.

That is, it includes a case seal surface formed around the opening of the case and a door having a door seal surface that opens and closes the opening by contacting the case seal surface, and the case seal surface is a drive shaft that drives the door. Since the distance from the axis of the door is formed so as to change along the extending direction of the axis, the movement of the door in the axial direction with respect to the case is preferably restricted, and the door moves in the axial direction of the drive shaft. It is possible to suitably prevent the door seal surface from peeling off, and it is possible to improve the durability.

It is an overall sectional view of the vehicle air conditioner which concerns on embodiment of this invention. FIG. 2A is an enlarged cross-sectional view showing the vicinity of the upper end of the first air mix door in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIB-IIB of FIG. 2A. FIG. 3A is an external perspective view of the first air mix door (second air mix door) shown in FIG. 1, and FIG. 3B is an external perspective view of the rear seat switching door shown in FIG. 4A is an enlarged cross-sectional view of the vicinity of the rear seat switching door in FIG. 1, and FIG. 4B is a cross-sectional view taken along the IVB-IVB line of FIG. 4A.

A preferred embodiment of the vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention.

As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioner case (case) 12 having a passage inside, an evaporator 14 arranged inside the air conditioner case 12 to cool air, and the evaporator. A heater core 16 provided on the downstream side of the 14 to heat the air, a door mechanism 18 for switching the flow of air flowing in each of the passages, and a rear seat blowing unit 20 for blowing air to the rear seat of the vehicle are included.

The air conditioning case 12 is formed from the first and second divided case portions 22 and 24 that can be divided in the width direction (arrows B1 and B2 directions in FIG. 2B) orthogonal to the front-rear direction (arrows A1 and A2 directions) of the vehicle. Above that (in the direction of arrow C1), there is a vent blower port 26 that blows air near the occupant's face in the passenger compartment, and a defroster blower port 28 that blows air near the front window of the vehicle adjacent to the vent blower port 26. And are open.

Further, in the width direction of the air conditioning case 12, as shown in FIG. 2B, the first case side wall (case wall surface) 30 is formed on the first divided case portion 22 which is one end side in the width direction (arrow B1 direction). The second case side wall (case wall surface) 32 is formed on the second divided case portion 24 which is on the other end side in the width direction (arrow B2 direction). The first case side wall 30 and the second case side wall 32 are formed so as to face each other and substantially parallel to both ends in the width direction.

The evaporator 14 is arranged on the front side (direction of arrow A1) inside the air conditioning case 12, and the refrigerant is supplied from a refrigerant supply source (not shown) to the inside to exchange heat between the passing air and the refrigerant. To cool the air.

The heater core 16 is arranged on the rear side (direction of arrow A2) inside the air conditioning case 12, and the cooling water (hot water) heated in the internal combustion engine is supplied to the inside to be between the passing air and the hot water. The air is exchanged with the air and the air is heated and supplied to the downstream side. The heater core 16 is held by a set of holders 34a and 34b provided at both ends in the height direction so as to be substantially orthogonal to the front-rear direction (arrows A1 and A2 directions) of the vehicle.

A set of first seal walls (case seal surfaces) 36a projecting toward the evaporator 14 side (arrow A1 direction) and abutting the first and second air mix doors 46 and 48 described later on the holders 34a and 34b. , 36b are formed, respectively.

As shown in FIGS. 2A and 2B, the first seal walls 36a and 36b extend along the width direction (arrows B1 and B2 directions) of the air conditioning case 12, and one end in the width direction is the air conditioning case 12. Is connected to the first case side wall 30 of the above, and the other end in the width direction thereof is connected to the second case side wall 32.

Further, as shown in FIG. 2B, the first seal walls 36a and 36b are formed at both ends in the width direction thereof, and are connected to the pair of first flat portions 38 connected to the first and second case side walls 30 and 32. It has a pair of first inclined portions 40a and 40b gradually inclined toward the center in the width direction with respect to the first flat portion 38, and a second flat portion 42 formed in the center in the width direction. ..

The first and second flat portions 38 and 42 are formed linearly along the width direction (arrows B1 and B2 directions) of the air conditioning case 12, and are formed on the first and second air mix doors 46 and 48 described later. On the other hand, the first flat portion 38 is formed close to each other and the second flat portion 42 is formed so as to be far from each other.

The outer side of the first inclined portions 40a and 40b in the width direction is connected to the end portion of the first flat portion 38, the inner side in the width direction is connected to the end portion of the second flat portion 42, and the width direction (arrow B1). , B2 direction), it is composed of a plurality of step portions (steps) 44 arranged so as to be lined up.

As shown in FIG. 2B, the step portion 44 is formed along the width direction (arrows B1 and B2 directions) of the air conditioning case 12 and has a triangular cross section having a predetermined height, and each has substantially the same shape. From the outside in the width direction on the side of the first flat portion 38 toward the center in the width direction on the side of the second flat portion 42, the distance L1 from the first and second air mix doors 46 and 48 is gradually formed. Is arranged so as to gradually increase. Specifically, the first inclined portions 40a and 40b are formed so that the separation distance L1 of the shaft 60 in the door mechanism 18 described later with respect to the axis D1 gradually increases from both ends in the width direction toward the center in the width direction. ..

That is, the first inclined portions 40a and 40b are formed in a stepped shape on the first seal walls 36a and 36b so as to gradually separate from the first and second air mix doors 46 and 48 from both ends in the width direction toward the center in the width direction. Has been done.

As shown in FIG. 1, the door mechanism 18 is provided between the evaporator 14 and the heater core 16 and is provided with the first and second air mix doors (doors) 46 and 48 for adjusting the mixing ratio of cold air and hot air. , Vent switching door 50 that adjusts the ventilation state from the vent ventilation port 26 to the passenger compartment, defroster switching door 52 that switches the ventilation state from the defroster ventilation port 28 to the front window, and a foot passage for the front seat (not shown). Also included are a foot switching door 54 for switching the ventilation state to the rear seat foot passage 76, and a rear seat switching door (door) 56 provided in the rear seat blowing unit 20 described later.

As shown in FIGS. 1 and 3A, the first and second air mix doors 46 and 48 are gently curved and formed in an arc shape having a convex cross section on the heater core 16 side on the downstream side, and the air conditioning case 12 It is arranged in a substantially straight line along the vertical direction (arrows C1 and C2 directions) with respect to the above, and each is provided so as to be slidable.

The first and second air mix doors 46 and 48 are meshed with the pinion gear 62 of the shaft (drive shaft) 60 via the rack gear 58 formed on the evaporator 14 side, respectively. As shown in FIG. 2B, the shaft 60 extends in the width direction of the air conditioning case 12, one end of which is pivotally supported by the first case side wall 30, and the other end of which is pivotally supported by the second case side wall 32. Has been done.

Then, the shaft 60 is rotated by a driving force from a driving means (not shown), so that the first and second air mix doors 46 and 48 move in the vertical direction (arrows C1 and C2) under the meshing action of the pinion gear 62 and the rack gear 58. Slide displacement in the direction).

Further, as shown in FIGS. 1 to 3A, the first and second air mix doors 46 and 48 are fully provided with the first seal member (door seal surface, seal member) 64 on the surface facing the heater core 16. Be done.

That is, the surfaces of the first and second air mix doors 46 and 48 facing the heater core 16 are the sealing surfaces to which the first sealing member 64 is adhered.

The first sealing member 64 is formed of, for example, a urethane foam compressible with an elastic material, and is in surface contact with the surfaces of the first and second air mix doors (board portions) 46, 48 by an adhesive or the like. Each is glued.

Further, the first seal member 64 is orthogonal to the first seal portions 66 provided at both ends along the slide directions (arrows C1 and C2 directions) of the first and second air mix doors 46 and 48 and the slide direction. It has second seal portions 68 provided at both ends in the width direction.

Further, as shown in FIGS. 2B and 3A, the first seal portion 66 includes a pair of tapered portions 70a formed so as to gradually increase in thickness from both ends in the width direction toward the center in the width direction, and the tapered portion. It is formed in a substantially trapezoidal cross section with a bulge 72a connected to 70a and formed in the center in the width direction. The inclination angle of the tapered portion 70a is formed to be substantially the same as the inclination angle of the first inclined portions 40a and 40b on the first seal walls 36a and 36b.

Further, the bulging portion 72a is formed so that the top thereof is linear along the width direction (arrows B1 and B2 directions) of the first seal member 64, and the length in the width direction is the first seal wall 36a. , 36b is formed so as to be substantially equal to the length of the second flat portion 42. That is, the first seal portion 66 of the first seal member 64 is formed so that its cross-sectional shape corresponds to the cross-sectional shape of the first seal walls 36a and 36b.

The second seal portion 68 has a rectangular cross section and is formed to have a predetermined thickness, and is connected to both ends in the width direction of the first seal portion 66.

Then, the first and second air mix doors 46 and 48 slide in the vertical direction to adjust the distribution ratio of the cooled air passing through the evaporator 14 to the heater core 16 side, and at both ends in the width direction. The first seal member 64 provided is in sliding contact with an inner wall (not shown) of the air conditioning case 12, and the first seal portions 66 provided at both ends along the slide direction (arrows C1 and C2 directions) are under the elastic action. The holders 34a and 34b are provided so as to be in sliding contact with the first seal walls 36a and 36b and the seal walls of the split ribs 73.

At this time, as shown in FIG. 2B, the tapered portion 70a of the first seal member 64 comes into contact with the first flat portion 38 and the first inclined portions 40a, 40b of the first seal walls 36a, 36b. The bulging portion 72a comes into contact with the second flat portion 42, and the tapered portion 70a is pressed against the first inclined portions 40a and 40b to make surface contact with the vicinity of the corner portion of the step portion 44. It will be in the state of.

As shown in FIGS. 1 and 4A, the rear seat blower unit 20 includes a duct (case) 78 having a rear seat vent aisle 74 and a rear seat foot aisle 76 inside, and is for the rear seat. The foot aisle 76 is on the upper side, and the rear seat vent aisle 74 is on the lower side. The foot aisle 76 is formed of two layers, and extends in the direction away from the air conditioning case 12 (arrow A2 direction).

Further, in the duct 78, a branch portion 80 is bifurcated into the rear seat vent aisle 74 and the rear seat foot aisle 76 on the upstream side of the rear seat vent aisle 74 and the rear seat foot aisle 76. Is formed, and the upstream side of the branch portion 80 is connected to the passage opened to the rear side of the air conditioning case 12.

Then, the rear seat foot aisle 76 is connected to an air outlet (not shown) facing the occupant's feet in the rear seat of the passenger compartment, and the rear seat vent aisle 74 is in the vicinity of the occupant's face in the passenger compartment. It is connected to the air outlet (not shown) facing the air.

Further, the branch portion 80 is provided with a rear seat switching door 56 for switching the communication state of the rear seat vent aisle 74 and the rear seat foot aisle 76 with respect to the air conditioning case 12 so as to be openable and closable. By opening and closing the door 56, the ventilation state to the rear seat side can be switched.

As shown in FIGS. 1 and 3B to 4B, the rear seat switching door 56 is, for example, with respect to a rotation shaft (drive shaft) 82 rotatably supported by the duct 78 and the rotation shaft 82. It is a rotary door having a shielding portion (board portion) 84 having an arcuate cross section provided on the outer side in the radial direction, and a pair of connecting walls 86 connecting the rotating shaft 82 and both ends in the width direction of the shielding portion 84, respectively. ..

The rear seat switching door 56 is arranged so that its rotating shaft 82 is substantially at the center of the branch portion 80, and a second seal member (door seal surface, seal member) 88 is provided on the surface of the shield portion 84. At the same time, the shielding portion 84 and the second sealing member 88 are formed so as to face the second sealing wall (case sealing surface) 90 of the branch portion 80.

As shown in FIGS. 4A and 4B, the second seal wall 90 is in the width direction of the duct 78 (in the directions of arrows B1 and B2 in FIG. 4B), similarly to the first seal walls 36a and 36b of the air conditioning case 12. One end in the width direction is connected to the first duct side wall (case wall surface) 92 of the duct 78, and the other end in the width direction is connected to the second duct side wall (case wall surface) 94. ..

Further, as shown in FIG. 4B, the second seal wall 90 is formed by a pair of third flat portions 96 formed at both ends in the width direction and connected to the first and second duct side walls 92 and 94, and the third flat portion 96. It has a pair of second inclined portions 98a and 98b gradually inclined toward the center in the width direction with respect to the flat portion 96, and a fourth flat portion 100 formed in the center in the width direction.

The third and fourth flat portions 96 and 100 are formed linearly along the width direction (arrows B1 and B2 directions) of the air conditioning case 12, and are formed with respect to the rotation axis 82 of the rear seat switching door 56. The three flat portions 96 are formed close to each other and the fourth flat portion 100 is formed so as to be far from each other.

The outer side of the second inclined portions 98a and 98b in the width direction is connected to the end portion of the third flat portion 96, the inner side in the width direction is connected to the end portion of the fourth flat portion 100, and the width direction (arrow B1). , B2 direction), it is composed of a plurality of step portions (steps) 44 arranged so as to be lined up. Since the configuration of the step portion 44 is the same as that of the first inclined portions 40a and 40b of the first seal walls 36a and 36b described above, detailed description thereof will be omitted here.

That is, the second inclined portions 98a and 98b of the second seal wall 90 are gradually separated from both ends in the width direction toward the center side in the width direction with respect to the axis D2 passing through the rotation axis 82 of the rear seat switching door 56. Is formed so as to gradually increase. In other words, the second inclined portions 98a and 98b are formed in the second seal wall 90 in a stepped shape gradually separated from the rear seat switching door 56 from both ends in the width direction toward the center in the width direction.

The second seal member 88 is formed of, for example, a compressible sheet from urethane foam, which is an elastic material, and is adhered with an adhesive or the like in a state of surface contact with the surface of the shielding portion 84 of the rear seat switching door 56. Will be done.

As shown in FIGS. 3B and 4B, the second seal member 88 is provided from both ends in the width direction of the rotation shaft 82 in the rear seat switching door 56 (in the directions of arrows B1 and B2) to the center in the width direction. It is formed in a substantially trapezoidal cross section including a pair of tapered portions 70b that gradually become thicker toward the taper portion and a bulging portion 72b that is connected to the tapered portion 70b and formed in the center in the width direction. The inclination angle of the tapered portion 70b is formed to be substantially the same as the inclination angle of the second inclined portions 98a and 98b of the second seal wall 90.

The bulging portion 72b is formed so that the top thereof is linear along the width direction (arrows B1 and B2 directions) of the second seal member 88, and the length in the width direction is the first in the second seal wall 90. 4 It is formed so as to be substantially equal to the length of the flat portion 100. That is, the second seal member 88 is formed so that its cross-sectional shape corresponds to the cross-sectional shape of the second seal wall 90.

Then, as shown in FIG. 1, the rear seat switching door 56 is rotated by a driving force from a driving source (not shown), so that the shielding portion 84 and the second seal member 88 become the second of the branch portion 80. The second seal member 88 is selectively opposed to the seal wall 90, the first and second seal surfaces 102a and 102b facing the branch portion 80, the rear seat vent aisle 74, and the rear seat foot aisle 76. Is in sliding contact with the second seal wall 90, the first and second seal surfaces 102a, 102b.

At this time, as shown in FIG. 4B, the tapered portion 70b of the second seal member 88 comes into contact with the third flat portion 96 and the second inclined portions 98a and 98b of the second seal wall 90 and bulges. The portion 72b comes into contact with the fourth flat portion 100, and the tapered portion 70b is pressed against the second inclined portions 98a and 98b, so that the portion 72b is in surface contact with the vicinity of the corner portion of the step portion 44. It becomes.

Further, the above-mentioned first seal walls 36a, 36b and the second seal wall 90 are configured to provide a plurality of step portions 44 on the first inclined portions 40a, 40b and the second inclined portions 98a, 98b, but the present invention is limited to this. It is not something that is done.

For example, instead of the step portion 44, a plurality of embosses (convex portions) protruding toward the first and second air mix doors 46 and 48 sides and the rear seat switching door 56 side may be provided, or conversely, A plurality of dimples (recesses) recessed in a direction away from the first and second air mix doors 46 and 48 and the rear seat switching door 56 may be provided. With such a configuration, it is possible to suitably reduce the contact area between the first and second seal members 64 and 88 and the first inclined portions 40a and 40b and the second inclined portions 98a and 98b.

The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above, and its operation and action / effect will be described next.

First, a case of performing a heating operation (foot mode) in which warm air is blown to the vicinity of the feet of the occupant will be described. In this case, the first air mix door 46 rises and the second air mix door 48 lowers under the driving action of a drive source (not shown in FIG. 1), so that the downstream side of the evaporator 14 and the upstream side of the heater core 16 Will be in a state of communication.

At this time, in the first seal member 64 of the first and second air mix doors 46 and 48, the first flat portion 38 of the first seal walls 36a and 36b in which both ends in the width direction are in contact with each other is shown in FIG. 2B. Since the distance L1 from the axis of the shaft 60, which is the center of the slide, is formed to be small, the sliding distance when the first seal member 64 slides along the first seal walls 36a and 36b is large. , It becomes shorter than the sliding distance sliding in the center in the width direction on the first seal walls 36a and 36b. As a result, peeling of the first seal member 64 with respect to the first and second air mix doors 46 and 48 is suitably suppressed at both ends in the width direction.

Further, the tapered portion 70a of the first seal member 64 slides in contact with the stepped portion 44 of the first inclined portions 40a and 40b of the first seal walls 36a and 36b, so that the tapered portion 70a covers the entire surface. As shown in FIG. 2B, as shown in FIG. 2B, since the contact is made only in the vicinity of the corner portion of the step portion 44, the contact area can be reduced, and accordingly, the contact area can be reduced. Sliding resistance and sliding noise are reduced.

Further, the first seal member 64 is arranged so as to face the first seal walls 36a and 36b formed having substantially the same cross-sectional shape, so that the first seal member 64 moves in the width direction (arrows B1 and B2 directions) of the air conditioning case 12. Is regulated and is positioned in a predetermined position in the width direction. Therefore, the movement of the first and second air mix doors 46 and 48 having the first seal member 64 in the width direction is restricted, and accordingly, the first and second air mix doors 46 and 48 move in the width direction. The peeling of the first seal member 64 that occurs when the first seal member 64 is moved is suppressed.

At the same time, the rear seat switching door 56 of the rear seat blower unit 20 is rotated under the driving action of a drive source (not shown), the shielding portion 84 faces the rear seat vent aisle 74, and the second seal member 88 is the second. It is assumed that the seal wall 90 and the first seal surface 102a are in sliding contact with each other. As a result, the aisle through which the warm air flows in the air conditioning case 12 is in a state of communicating with the rear seat foot aisle 76 via the branch portion 80.

At this time, the second seal member 88 of the rear seat switching door 56 rotates while sliding in contact with the second seal wall 90, so that the tapered portion 70b becomes the third flat portion 96 and the second inclined portions 98a and 98b. The bulging portion 72b slides along the fourth flat portion 100 while sliding along the step portion 44.

Both ends in the width direction of the second seal member 88 reach the third flat portion 96 formed so that the distance L2 from the rotating shaft 82 of the rear seat switching door 56 is smaller than the center in the width direction having the bulging portion 72b. The sliding distance when the second seal member 88 slides along the second seal wall 90 is shorter than the sliding distance at the center in the width direction. Therefore, peeling of the second seal member 88 with respect to the shielding portion 84 of the rear seat switching door 56 is preferably suppressed at both ends in the width direction of the second seal member 88.

Further, the tapered portion 70b of the second seal member 88 slides in contact with the stepped portions 44 of the second inclined portions 98a and 98b of the second seal wall 90, so that the tapered portion 70b is entirely covered. Compared with the case of surface contact, since the contact is made only in the vicinity of the corner portion of the step portion 44, the contact area can be reduced, and the sliding resistance and the sliding noise are reduced accordingly. To.

Further, the second seal member 88 is arranged so as to face the second seal wall 90 formed having substantially the same cross-sectional shape, so that the movement of the air conditioning case 12 in the width direction (arrows B1 and B2 directions) is restricted. Then, it is in a state of being positioned at a predetermined position in the width direction. Therefore, the movement of the rear seat switching door 56 having the second seal member 88 in the width direction is restricted, and accordingly, the rear seat switching door 56 occurs when the rear seat switching door 56 moves in the width direction. 2 Peeling of the seal member 88 is suppressed.

Then, the air supplied into the air conditioning case 12 becomes warm air heated by passing through the heater core 16 after passing through the evaporator 14, and this warm air becomes hot air from the front seat foot aisle (not shown) on the front seat side. The air is blown to the vicinity of the occupant's feet and flows to the rear seat foot aisle 76 of the rear seat blast unit 20 to be blown to the vicinity of the occupant's feet on the rear seat side.

Next, a case of performing a cooling operation in which a temperature-controlled air is blown to the vicinity of the occupant's face in the vehicle interior will be described. In this case, as shown in FIG. 1, the first air mix door 46 descends and the second air mix door 48 rises under the driving action of the drive source (not shown).

As a result, the first seal member 64 provided at the lower end of the first air mix door 46 and the first seal member 64 provided at the upper end of the second air mix door 48 are in sliding contact with the split rib 73, respectively. The first seal member 64 provided at the upper end of the first air mix door 46 and the lower end of the second air mix door 48 slides into contact with the first seal walls 36a and 36b, respectively, on the downstream side of the evaporator 14. The communication between the heater core 16 and the upstream side of the heater core 16 is cut off.

At the same time, the rear seat switching door 56 of the rear seat blower unit 20 is rotated under the driving action of a drive source (not shown), the shielding portion 84 faces the rear seat foot aisle 76, and the second seal member 88 It is assumed that the branch portion 80 is in contact with the second seal wall 90 and the second seal surface 102b. As a result, the rear seat vent aisle 74 is in a state of communicating with the aisle of the air conditioning case 12 via the branch portion 80.

Then, the air supplied into the air conditioning case 12 passes through the evaporator 14 and becomes cold air, and flows so as to bypass the heater core 16, so that a part of the air flows from the vent air outlet 26 to the vicinity of the occupant's face on the front seat side. At the same time, the air flows from the rear end of the air conditioning case 12 to the rear seat vent passage 74 and is blown to the vicinity of the occupant's face on the rear seat side.

As described above, in the present embodiment, in the air conditioner case 12 constituting the vehicle air conditioner 10, the first seal wall 36a, which is in sliding contact with the first seal member 64 of the first and second air mix doors 46 and 48, A pair of first flat portions 38 formed on both ends in the width direction on the side walls 30 and 32 of the first and second cases, and a pair of first flat portions 38 inclined from the first flat portions 38 toward the center in the width direction. It includes one inclined portion 40a and 40b and a second flat portion 42 formed at the center in the width direction.

On the other hand, the second seal wall 90 with which the second seal member 88 of the rear seat switching door 56 is in sliding contact is a pair of third flat portions formed on both ends in the width direction on the first and second duct side walls 92 and 94. 96, a pair of second inclined portions 98a and 98b inclined toward the center in the width direction from the third flat portion 96, and a fourth flat portion 100 formed in the center in the width direction are provided.

As a result, the first inclined portions 40a and 40b are provided on the first seal walls 36a and 36b so as to be inclined from both ends in the width direction to the center in the width direction in the direction away from the first and second air mix doors 46 and 48. As a result, the separation distance L1 from the shaft 60 serving as the drive shaft of the first and second air mix doors 46 and 48 to the first seal walls 36a and 36b is set in the axial direction of the shaft 60 (directions of arrows B1 and B2). Can be changed in.

Similarly, in the second seal wall 90, the second inclined portions 98a and 98b inclined from both ends in the width direction toward the center in the width direction toward the direction away from the rotation shaft 82 of the rear seat switching door 56 are provided. The separation distance L2 from the rotating shaft 82 to the second seal wall 90 can be changed in the axial direction of the rotating shaft 82 (directions of arrows B1 and B2).

As a result, in the air conditioning case 12, the first and second air mix doors 46 and 48 move in the axial direction (arrows B1 and B2 directions) of the shaft 60, that is, in the width direction, that is, the first inclined portions 40a and 40b. The rear seat switching door 56 is preferably regulated by the second inclined portions 98a and 98b to move in the axial direction (arrows B1 and B2 directions) of the rotating shaft 82, that is, in the width direction in the duct 78. Will be done.

As a result, by suppressing the movement of the first and second air mix doors 46 and 48 and the rear seat switching door 56 in the width direction, the first and second seal members 64 and 88 due to the movement in the width direction Peeling is prevented, and the durability can be improved accordingly.

Further, in the first seal wall 36a, 36b and the second seal wall 90, the first and third flat portions 38, 96 formed at both ends in the width direction are always in contact with the first and second seal members 64, 88. Moreover, the distances L1 and L2 from the shaft 60 and the rotating shaft 82 are formed to be the smallest.

Therefore, when the first and second air mix doors 46 and 48 and the rear seat switching door 56 open and close, the first and third flat portions 38 and 96 are the other first inclined portions 40a and 40b and the second. The radius of gyration can be reduced as compared with the inclined portions 98a and 98b and the second and fourth flat portions 42 and 100, and accordingly, the first seal wall 36a and 36b and the first seal wall 90 with respect to the first seal wall 90a and 36b And the sliding distance of the second seal members 64 and 88 can be minimized. As a result, it is possible to prevent the first and second seal members 64 and 88, which are most easily peeled off, from peeling off from both ends in the width direction, and to improve the durability thereof.

Further, the first and second seal members 64 and 88 have the first and second case side walls 30, 32 and 1 in the width direction (arrows B1 and B2 directions) which is the extending direction of the shaft 60 and the rotating shaft 82. The first inclined portions 40a and 40b and the second inclined portions 98a and 98b inclined in the direction away from the shaft 60 and the rotating shaft 82 toward the center in the width direction from the second duct side walls 92 and 94 are provided, respectively.

Therefore, for example, due to a manufacturing error of the air conditioning case 12, the duct 78, etc., between the first and second case side walls 30 and 32 and the first and second air mix doors 46 and 48, the first and second ducts. Even when a gap is formed between the side walls 92 and 94 and the rear seat switching door 56 and the first and second air mix doors 46 and 48 and the rear seat switching door 56 can be moved in the width direction, the first The inclined portions 40a and 40b and the second inclined portions 98a and 98b are preferably positioned toward the center in the width direction and can be stably held.

Furthermore, in the first seal walls 36a, 36b and the second seal wall 90, the first inclined portions 40a, 40b and the second inclined portions 98a, 98b are provided with a plurality of step portions 44, respectively. The contact area with the first and second seal members 64 and 88 can be reduced by the step portion 44, and the first and second air mix doors 46 and 48 and the rear seat switching door 56 are the first seal wall 36a. , 36b and the sliding resistance when sliding along the second seal wall 90 can be reduced, and at the same time, the sliding noise generated during sliding can be suppressed.

Furthermore, in the first seal walls 36a, 36b and the second seal wall 90, the first inclined portions 40a, 40b and the second inclined portions 98a, 98b have a distance to the first and second sealing members 64, 88. By providing a plurality of different embosses and dimples, the contact areas of the first and second sealing members 64 and 88 with respect to the first inclined portions 40a and 40b and the second inclined portions 98a and 98b are suitably reduced, and the first The sliding resistance and sliding noise when the second air mix doors 46 and 48 and the rear seat switching door 56 slide along the first seal walls 36a and 36b and the second seal wall 90 are further reduced. be able to.

Further, the first seal member 64 is provided on the slide type first and second air mix doors 46 and 48 that slide in the air conditioning case 12, and the first seal wall 36a and 36b to which the first seal member 64 slides are provided. On the other hand, it is preferable to provide the first inclined portions 40a and 40b. A second seal member 88 is provided on the rear seat switching door 56 which is a rotary door, and the second seal member 88 is slidably contacted with the second seal wall 90. On the other hand, it is preferable to provide the second inclined portions 98a and 98b.

Further, the seal wall having an inclined portion whose distance from the drive shaft of the door changes in the width direction of the air conditioning case 12 and the duct 78 includes the first and second air mix doors 46 and 48, and the rear seat switching door 56. The sliding surface of the door (seal wall) that slides with respect to the air conditioning case 12 and the duct 78 is not limited to the case where the sliding first seal walls 36a and 36b and the second seal wall 90 are provided. ) May be provided.

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

10 ... Vehicle air conditioner 12 ... Air conditioner case 18 ... Door mechanism 20 ... Rear seat blower unit 22 ... First split case part 24 ... Second split case part 36a, 36b ... First seal wall 38 ... First flat part 40a , 40b ... 1st inclined portion 42 ... 2nd flat portion 44 ... Step portion 46 ... 1st air mix door 48 ... 2nd air mix door 56 ... Rear seat switching door 60 ... Shaft 64 ... 1st seal member 70a, 70b ... Tapered part 72a, 72b ... Swelling part 78 ... Duct 82 ... Rotating shaft 84 ... Shielding part 88 ... Second seal member 90 ... Second seal wall 96 ... Third flat part 98a, 98b ... Second inclined part 100 ... Second 4 Flat part

Claims (7)

A case having a passage for air flow inside, a case seal surface formed around the opening in the case, and a door seal surface that opens and closes the opening by sliding in contact with the case seal surface. In a vehicle air conditioner provided with a door and a drive shaft for driving the door.
The case seal surface is a vehicle air conditioner in which the separation distance of the drive shaft from the axis changes along the extending direction of the axis. In the vehicle air conditioner according to claim 1,
A vehicle air conditioner in which the case seal surface is always in contact with the door seal surface at a portion adjacent to the case wall surface of the case, and the distance from the axis of the drive shaft is set to be the smallest. In the vehicle air conditioner according to claim 1 or 2.
The case seal surface is formed so as to be inclined from the case wall surface toward the center of the case seal surface in the extending direction of the axis in a direction away from the axis. In the vehicle air conditioner according to claim 3,
A vehicle air conditioner in which a plurality of steps are provided on the case seal surface. In the vehicle air conditioner according to claim 3 or 4.
A vehicle air conditioner in which a plurality of concave portions and convex portions having different distances from the door seal surface are provided on the case seal surface. In the vehicle air conditioner according to any one of claims 1 to 5.
The door is a rotary door in which the drive shaft is supported by the case, is separated from the drive shaft in the radial direction, extends in the circumferential direction of the drive shaft, and has a door seal surface composed of a substrate portion and a seal member. Air conditioner for vehicles. In the vehicle air conditioner according to any one of claims 1 to 5.
The door is driven from a pinion gear provided on the drive shaft and a rack gear meshed with the pinion gear, and the door seal surface composed of a substrate portion and a seal member in a sliding direction with respect to the case seal surface. A vehicle air conditioner that is an extending sliding door.

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