JP2008296744A - Air passage opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance a sealing property by eliminating influence of an error in manufacturing and assembling. <P>SOLUTION: The air passage opening/closing device is provided with a case 11 for forming openings 23, 24 for an air passage; and a door 28 arranged in the case 11 and opening/closing the openings 23, 24, and the door 28 has a rotation shaft 28a rotatably supported on the case 11; and a door body part 28b integrally rotated with the rotation shaft 28a. The door body part 28b has a recession-like shape part 30 recessed in a door rotation direction; and a door side sealing surface 31 formed in a flat surface-like shape spread in a direction crossing to the door rotation direction at an edge part of the recession-like shape part 30, and on the edge parts of the openings 23, 24, case side sealing surfaces 23a, 24a in the flat surface-like shape are formed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to an air passage opening and closing device including a plate door that opens and closes an air passage, and is suitable for use in a vehicle air conditioner.

  Conventionally, in this kind of air passage opening and closing device, a plate door plate is provided with a concave portion (arc-shaped curved surface portion) that is recessed in a shape along the main flow of the air flow swirling U-turn. 1.

According to this prior art, the plate surface of the plate door has a shape that follows the main flow of the U-turn swirling air flow, so that the air flow is smoother than when the plate surface is formed in a simple flat plate shape. The turn can be swung, and the ventilation resistance on the plate surface can be suppressed.
JP 2004-148963 A

  By the way, the said prior art is not disclosed at all about the sealing structure in the board door by which the concave shape part was provided in the board surface.

  Therefore, the present inventor examined the seal structure shown in FIG. 8 as a seal structure in a plate door in which a concave portion is provided on the plate surface. The plate door 50 of this examination example is a cantilever door in which the rotary shaft 50a is disposed at one end portion (lower end portion in FIG. 3) of the door main body portion 50b. (Curved surface portion).

  Then, the case-side sealing surface 52 formed at the edge of the air passage 51 is formed in a concave shape (arc-shaped curved surface shape) corresponding to the door body 50b, and the door body 50b, the case-side sealing surface 52, Exerts a sealing property by contacting.

  However, in this study example, the seal structure is configured in a concave shape and not in a flat shape, so there is a gap between the door-side seal surface and the case-side seal surface due to manufacturing and assembly errors. It is easy to generate | occur | produce and there exists a problem that a sealing defect is easy to generate | occur | produce.

  In view of the above points, an object of the present invention is to improve the sealing performance by eliminating the influence of manufacturing and assembly errors.

To achieve the above object, the present invention comprises a case (11) that forms openings (23, 24) of an air passage,
A door (28) disposed in the case (11) and opening and closing the openings (23, 24);
The door (28) includes a rotating shaft (28a) rotatably supported with respect to the case (11), and a door main body (28b) that rotates integrally with the rotating shaft (28a).
The door body portion (28b) has a concave portion (30) that is recessed in the door rotation direction, and a door-side seal that is formed in a planar shape that extends in the direction intersecting the door rotation direction at the edge of the concave portion (30). Surface (31),
A planar case-side sealing surface (23a, 24a) is formed at the edge of the opening (23, 24).

  According to this, since both the door-side sealing surface (31) and the case-side sealing surfaces (23a, 24a) are formed in a flat shape, the sealing structure is configured in a flat shape. For this reason, compared with the seal structure configured in a concave shape as in the above examination example, due to manufacturing and assembly errors, there is a gap between the door-side seal surface (31) and the case-side seal surface (23a, 24a). Since the generation of a gap can be suppressed, the influence of errors in manufacturing and assembly can be eliminated and the sealing performance can be improved.

In the present invention, specifically, the concave portion (30) is a rectangular shape whose planar shape extends in parallel with the rotation axis (28a),
The door-side sealing surface (31) has a rectangular frame shape protruding from the entire edge of the concave-shaped part (30) to the outer side of the concave-shaped part (30),
The door main body (28b) only needs to be coupled to the rotary shaft (28a) at a portion of the door-side seal surface (31) that extends in parallel with the rotary shaft (28a).

Further, in the present invention, specifically, the concave portion (30) is a rectangular shape whose planar shape extends in parallel with the rotation axis (28a),
The door main body (28b) is coupled to the rotation shaft (28a) at a portion extending in parallel with the rotation shaft (28a) among the edges of the concave portion (30).
The door-side sealing surface (31) is a U-shape projecting outward from the portion of the edge of the concave portion (30) excluding the portion coupled to the rotating shaft (28a). You may have a shape.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the air passage opening / closing door according to the present invention is applied to an air mix door of a vehicle air conditioner. FIG. 1 illustrates an air conditioner unit portion of the indoor unit portions of the vehicle air conditioner according to the present embodiment. 10 is a schematic cross-sectional view of FIG.

  The air conditioning unit 10 is disposed at a substantially central portion in the vehicle width (left and right) direction inside an instrument panel (not shown) at the front of the vehicle interior. At that time, the air conditioning unit 10 is mounted as shown by arrows in FIG.

  Note that a blower unit (not shown) that blows air to the air conditioning unit 10 is offset from the air conditioning unit 10 to the passenger seat side inside the instrument panel. As is well known, this blower unit blows the air introduced from the inside / outside air switching unit to the air conditioning unit 10 for switching between the inside air (vehicle interior air) and the outside air (vehicle outside air). And a centrifugal blower unit.

  The air conditioning unit 10 has a resin case 11, and the case 11 constitutes an air passage through which blown air flows from the lower side to the upper side. An air inlet space 12 into which the air blown from the blower unit flows is formed in the lowermost part inside the case 11.

  An evaporator 13 forming a cooling heat exchanger and a heater core 14 forming a heating heat exchanger are disposed above the air inlet space 12. The evaporator 13 is disposed immediately above the air inlet space 12, and the heater core 14 is disposed further above the evaporator 13.

  The evaporator 13 is disposed at a predetermined height above the bottom surface portion 15 of the case 11 at a predetermined angle (for example, about 20 °) from the horizontal plane. More specifically, the evaporator 13 is inclined and arranged obliquely downward toward the vehicle rear side by a predetermined inclination angle from the horizontal plane.

  The bottom surface portion 15 of the case 11 constitutes a receiving portion for condensed water generated in the evaporator 13, and a discharge pipe for discharging condensed water to the outside of the passenger compartment at the bottom of the bottom surface portion 15 on the vehicle front side. (Not shown) is arranged.

  As is well known, the evaporator 13 is supplied with low-pressure refrigerant decompressed by a decompression means (not shown) of an air-conditioning refrigeration cycle, and the low-pressure refrigerant absorbs heat from the blown air and evaporates to cool the blown air. It is supposed to be.

  Note that the evaporator 13 has a configuration in which a heat exchange core portion 13c is disposed between the tank portions 13a and 13b as is well known. The heat exchange core portion 13c has a configuration in which a plurality of flat tubes (not shown) and a plurality of corrugated fins (not shown) are alternately stacked. The air that has flowed into the air inlet space 12 passes through the heat exchange core 13c of the evaporator 13 from below to above as indicated by an arrow a.

  On the other hand, the heater core 14 is a hot water heating heat exchanger that heats air using hot water (cooling water) from a vehicle engine (not shown) as a heat source, and the heater core 14 is opposed to the heater core 14 at a predetermined interval. The heat exchange core portion 14c is arranged between the lower hot water inlet tank portion 14a and the upper hot water outlet tank portion 14b.

  The heat exchange core portion 14c has a configuration in which a plurality of flat tubes (not shown) and a plurality of corrugated fins (not shown) are alternately stacked and joined.

  Since the heater core 14 is disposed on the upper side of the evaporator 13 and on the rear side of the vehicle, the heater core 14 is bypassed on the front side of the vehicle with respect to the heater core 14 so that the cool air flows as indicated by an arrow b. A cold air bypass passage 16 is formed.

  An air mix door 17 is disposed between the heater core 14 and the evaporator 13. The rotary shaft 17 a of the air mix door 17 is arranged to extend in the vehicle width direction on the vehicle front side of the hot water outlet tank portion 14 b of the heater core 14, and both end portions of the rotary shaft 17 a are bearings on the left and right side wall surfaces of the case 11. It is rotatably held by a hole (not shown).

  One end of the rotating shaft 17a is connected to the temperature adjusting operation mechanism via a link mechanism outside the case 11, and the air mix door 17 is rotated by this temperature adjusting operation mechanism. This temperature adjustment operation mechanism is configured by an automatic operation mechanism using a servo motor, but may be a manual operation mechanism that is directly operated by a manual operation force of an occupant.

  As is well known, the air mix door 17 has an air volume ratio between hot air (arrow c) passing through the heat exchange core portion 14c of the heater core 14 and cold air (arrow b) bypassing the heater core 14 and passing through the cold air bypass passage 16. It is a temperature adjusting means for adjusting and adjusting the temperature of the air blown into the passenger compartment.

  In FIG. 1, the solid line position of the air mix door 17 is the maximum heating position where the cold air bypass passage 16 is fully closed and the air inlet passage 18 of the heat exchange core portion 14 c of the heater core 14 is fully opened. The position of the two-dot chain line of the air mix door 17 is the maximum cooling position where the cold air bypass passage 16 is fully opened and the air inlet passage 18 is fully closed.

  When the air mix door 17 opens the air inlet passage 18, the air that has passed through the evaporator 13 passes through the heat exchange core portion 14 c and flows above the heater core 14 as indicated by an arrow c.

  A warm air passage 19 is formed on the upper side of the heater core 14, and the warm air flows through the warm air passage 19 toward the air mixing unit 20. The air mixing unit 20 is formed at the junction of the cold air bypass passage 16 and the hot air passage 19 to mix the cold air and the hot air. Air of a desired temperature is obtained by mixing the cold and hot air. The air mixing unit 20 is formed above the air mix door 17 in the case 11.

  On the upper surface of the case 11, a defroster opening 21 that blows conditioned air toward the vehicle window glass is disposed at a front portion of the vehicle, and the conditioned air is directed toward the upper body side of the occupant at a portion on the rear side of the vehicle. The face opening portion 22 for blowing out is disposed.

  The conditioned air whose temperature is adjusted from the air mixing unit 20 flows into the defroster opening 21 through the first communication port 23. The air conditioning air whose temperature is adjusted from the air mixing unit 20 flows out through the second communication port 24 into the face opening 22. The first and second communication ports 23 and 24 correspond to the openings in the present invention.

  A foot opening 25 communicating with the second communication port 24 is disposed in the case internal space below the face opening 22. The conditioned air that has passed through the second communication port 24 and the foot opening 25 passes through the foot outlet passage 26 and blows out the conditioned air from the foot outlet 27 that opens to the left and right sides of the vehicle toward the feet of the occupant.

  The first communication port 23 and the second communication port 24 are opened and closed by a first blowing mode switching door 28, and the face opening 22 and the foot opening 25 are opened and closed by a second blowing mode switching door 29. The first and second blowing mode switching doors 28 and 29 are also rotated by an operation mechanism similar to the temperature adjustment operation mechanism of the air mix door 17.

  2 is a perspective view of the first blowing mode switching door 28, FIG. 3 is a front view of the first blowing mode switching door 28, and FIG. 4 is a cross-sectional view taken along line AA of FIG. In FIGS. 2 and 3, a packing 32 described later is omitted for convenience of illustration.

  The first blow mode switching door 28 is composed of a rotating shaft 28a and a door main body 28b that is integrally coupled to the rotating shaft 28a and rotates about the rotating shaft 28a, and is integrally formed with a synthetic resin such as polypropylene. Molded.

  In the present embodiment, the first blow mode switching door 28 is configured such that the rotary shaft 28a is disposed at one end portion (lower end portion in FIG. 3) of the door main body portion 28b, and the other end portion (upper end portion in FIG. 2). Part) is composed of a cantilever door on the rotation tip side.

  The door main body portion 28b of the first blow-out mode switching door 28 includes a concave portion 30 that is recessed in the door rotation direction, and a direction that intersects the door rotation direction at the edge of the concave portion 30 (in this example, the door rotation direction). And a door-side sealing surface 31 formed in a planar shape extending in a direction orthogonal to the direction of the vertical axis.

  In this example, the concave-shaped part 30 is comprised by the concave surface of circular cross-section extended in parallel with the rotating shaft 28a, and the substantially semicircular side plate arrange | positioned so that the axial direction both ends of a concave surface may be plugged up. Accordingly, the concave portion 30 has a rectangular shape in which the planar shape (the shape shown in FIG. 3) extends parallel to the rotation shaft 28a.

The door-side sealing surface 31 has a rectangular frame shape that projects outward from the entire edge of the recessed portion 30. The door main body 28b is coupled to the rotary shaft 28a at a portion (a lower portion in FIG. 3) extending in parallel with the rotary shaft 28a of the door-side seal surface 31 on both plate surfaces of the door-side seal surface 31. A thin plate-like packing (seal member) 32 made of a porous resin elastic material such as urethane foam is attached by adhesion or the like.

  The door-side seal surface 31, the planar first case-side seal surface 23 a (FIG. 1) formed on the peripheral edge of the first communication port 23, and the planar surface formed on the peripheral edge of the second communication port 24. The packing 32 is elastically compressed and deformed with the second case side seal surface 24a (FIG. 1) to obtain a sealing action when the first communication port 23 and the second communication port 24 are closed.

  The first and second case-side sealing surfaces 23a and 24a correspond to the case-side sealing surfaces in the present invention. In this example, the rectangular frame shape corresponding to the rectangular frame shapes of the door-side sealing surface 31 and the packing 32 is used. have. The first and second case-side sealing surfaces 23 a and 24 a can be integrally formed with the case 11.

  The packing 32 may have a rectangular frame shape that is stamped and formed in accordance with the rectangular frame shape of the door-side seal surface 31, or may be a rectangular frame shape that is a combination of a plurality of packings formed in a band shape. Further, instead of the packing 32, a seal member formed of a thermoplastic elastomer may be used. When a thermoplastic elastomer is used as the seal member, the seal member can be integrally injection-molded with the first blow mode switching door 28 made of resin.

  As shown in FIG. 1, in this example, the second blowing mode switching door 29 includes a rotating shaft 29a, an outer peripheral wall surface 29b extending in the door rotating direction, and both axial portions of the rotating shaft 29a and the outer peripheral wall surface 29b. It is comprised with what is called a rotary door which has the fan-shaped side plate 29c which connects between.

  In the rotary door 29, a door side seal portion 29d made of an elastic seal material is provided on the peripheral edge of the outer peripheral wall surface 29b and the fan-shaped side plate 29c. The door-side seal portion 29d has a second case-side seal surface 24a, a planar third case-side seal surface 22a formed between the face opening 22 and the foot opening 25, and a lower side of the foot opening 25. The face opening 22 and the foot opening 25 are sealed when the face opening 22 and the foot opening 25 are closed by elastically pressing the flat fourth case side sealing surface 25a formed on the surface.

  Next, the operation of this embodiment will be described based on the above configuration. When blown air is blown from the blower unit (not shown) to the front portion of the evaporator 13 through the air inlet space 12, the blown air passes through the evaporator 13 from the vehicle front side to the vehicle rear side as indicated by the arrow a and cools. It becomes cold wind.

  Next, the cold air is distributed into the cool air b passing through the cool air bypass passage 16 and the warm air c passing through the heater core 14 according to the opening of the air mix door 17. Mix in the vicinity. Therefore, by adjusting the air volume ratio of the cool air b and the warm air c by the air mix door 17, air at a desired temperature is obtained in the air mixing unit 20.

  Next, the blowing mode switching operation will be described. Now, when the face mode is set, the first blow mode switching door 28 is operated to a position where the first communication port 23 is fully closed and the second communication port 24 is fully opened by a blow mode operation mechanism (not shown). The At the same time, the second blowing mode switching door 29 is operated to the position of the two-dot chain line by the blowing mode operation mechanism, and the face opening 22 is fully opened and the foot opening 25 is fully closed.

  Accordingly, the conditioned air adjusted to a desired temperature by the air mix door 17 (face mode is mainly cold air) flows from the air mixing unit 20 through the second communication port 24 and flows into the face opening 22 and this face opening. It blows out from the part 22 to the passenger's upper body and cools the passenger compartment.

  Next, when the bi-level mode is set, the first air outlet mode switching door 28 fully closes the first communication port 23 by the blow mode operation mechanism (not shown) in the same manner as in the face mode, and the second communication port. 24 is operated to a position where it is fully opened. Moreover, since the 2nd blowing mode switching door 29 becomes an intermediate position of the solid line position of FIG. 1, and the dashed-two dotted line position, both the face opening part 22 and the foot opening part 25 open simultaneously about the same extent.

  Therefore, a part of the conditioned air whose temperature is adjusted by the air mix door 17 blows out from the face opening 22 to the upper body of the occupant, and at the same time, the remaining conditioned air flows into the foot opening 25 and the foot blowing passage 26. The air flows from the blowout passage 26 to the foot blowout openings 27 that are opened on both the left and right sides of the case 11, and the conditioned air blows out from the foot blowout openings 27 toward the occupant's feet.

  Next, when the foot mode is set, the first blow mode switching door 28 is in the position shown by the solid line in FIG. 1, and the first communication port 23 is opened by a minute opening. Moreover, the 2nd blowing mode switching door 29 will be in the position of the continuous line of FIG. 1, the face opening part 22 will be fully closed, and the foot opening part 25 will be fully opened.

  For this reason, most of the air whose temperature has been adjusted by the air mixing unit 20 is blown out to the feet of the occupants through the foot opening 25, the foot blowing passage 26, and the foot blowing port 27, and the air whose temperature has been adjusted by the air mixing unit 20 A part is blown out to the vehicle window glass side through the first communication port 23 and the defroster opening 21.

  At this time, the flow of air flowing from the air mixing unit 20 into the foot opening 25 makes a U-turn as shown by the solid arrow d. Here, the broken line arrow e in FIG. 1 shows a U-turn swirl flow as a comparative example when the door main body portion 28b of the first blowing mode switching door 28 is formed in a simple flat plate shape.

  As can be seen from the comparison between the solid line arrow d and the broken line arrow e, in the present embodiment, the door main body part 28b of the first blow-out mode switching door 28 has a concave-shaped part that is recessed in a shape along the main flow of the U-turn swirling air flow. Since 30 is provided, the air flow can be smoothly turned in a U-turn as compared with the case where the door body 28b is formed in a simple flat plate shape, and the ventilation resistance in the door body 28b can be suppressed. it can. Therefore, it is possible to increase the amount of hot air blown out from the foot opening 25 and to reduce noise accompanying the hot air blowing.

  Next, when the foot defroster mode is set, the first blowing mode switching door 28 is in the middle position between the solid line position and the two-dot chain line in FIG. 1, and both the first communication port 23 and the second communication port 24 are the same at the same time. Open to the extent. Moreover, the 2nd blowing mode switching door 29 will be in the position of the continuous line of FIG. 1, the face opening part 22 will be fully closed, and the foot opening part 25 will be fully opened.

  Thereby, the air whose temperature is adjusted by the air mixing unit 20 is blown out to the vehicle window glass side through the first communication port 23 and the defroster opening 21 to prevent the vehicle window glass from being fogged. At the same time, the air whose temperature has been adjusted by the air mixing unit 20 is blown out to the feet of the occupant through the foot opening 25, the foot outlet passage 26, and the foot outlet 27 to heat the occupant's feet.

  Next, when the defroster mode is set, the first blowing mode switching door 28 becomes a two-dot chain line in FIG. 1, and the first communication port 23 is fully opened and the second communication port 24 is fully closed. Thereby, the air temperature-adjusted by the air mixing part 20 can be blown out to the vehicle window glass side through the first communication port 23 and the defroster opening part 21, and the anti-fogging ability of the vehicle window glass can be improved.

  By the way, as described above, the sealing structure of the first blow-off mode switching door 28 includes the door-side seal surface 31 formed in a flat shape and the first case-side seal surfaces 23a and 24a formed in the same flat shape. The packing 32 is elastically compressed and deformed between them to secure the door sealability. That is, the seal structure of the first blowing mode switching door 28 is formed in a flat shape.

  For this reason, as compared with the seal structure configured in a concave shape as in the examination example of FIG. 8, there is an error in manufacturing and assembling between the door-side seal surface 31 and the first case-side seal surfaces 23a and 24a. Since the generation of a gap can be suppressed, the influence of errors in manufacturing and assembly can be eliminated and the sealing performance can be improved.

(Second Embodiment)
In the said 1st Embodiment, although the concave surface of the concave shape part 30 is formed in cross-sectional arc shape, in this 2nd Embodiment, as shown in FIG. 5, the concave surface is formed in cross-sectional triangle shape. Also in this embodiment, the same effect as the first embodiment can be obtained.

(Third embodiment)
In the said 1st Embodiment, although the 1st blowing mode switching door 28 is comprised by the cantilever door, in this 3rd Embodiment, as shown in FIG. 6, the 1st blowing mode switching door 28 is a butterfly door, In other words, the rotary shaft 28a is arranged at the center of the door main body 28b, and both ends of the door main body 28b are doors that are on the rotation front side.

  And the recessed shape part 30 and the door side sealing surface 31 are each provided in the site | part of one end side (upper end side of FIG. 6) and the other end side (lower end side of FIG. 6) rather than the rotating shaft 28a among the door main-body parts 28b. Forming.

  In this example, the concave surface of one concave shape portion 30 (upper side in FIG. 6) is formed in a cross-section arc shape, and the concave surface of the other concave shape portion 30 (lower side in FIG. 6) is formed in a triangular shape in cross section. Yes.

  Also in this embodiment, the same effect as the first embodiment can be obtained.

(Fourth embodiment)
In the first embodiment, the door-side seal surface 31 has a rectangular frame shape. However, in the third embodiment, as shown in FIG. 7, the door-side seal surface 31 has a U-shape. ing.

  More specifically, the door main body 28b is coupled to the rotary shaft 28a at a portion (a portion on the lower side in FIG. 7) extending in parallel with the rotary shaft 28a in the edge portion of the concave shaped portion 30. The side seal surface 31 protrudes outward from the portion (the left and right sides and the upper portion in FIG. 7) of the edge of the concave portion 30 excluding the portion coupled to the rotating shaft 28 a. It has a U shape.

  On the other hand, the first and second case-side sealing surfaces 23a and 24a may have a U-shape corresponding to the U-shape of the door-side sealing surface 31 or a rectangular frame similar to that of the first embodiment. It may be a shape.

  Also in this embodiment, the same effect as the first embodiment can be obtained.

(Other embodiments)
In each of the above embodiments, an example in which the present invention is applied to a blow mode switching door of a vehicle air conditioner has been described. However, the present invention is not limited to this, and the present invention is not limited to this. Can also be applied.

  Further, the present invention can be widely applied to various air passage opening / closing devices such as an air passage opening / closing device in an air conditioner installed in a house or a building.

It is sectional drawing which shows schematic structure of the air conditioning unit of the vehicle air conditioner by 1st Embodiment of this invention. It is a perspective view which shows the 1st blowing mode switching door of 1st Embodiment. It is a front view which shows the 1st blowing mode switching door of 1st Embodiment. It is AA sectional drawing of FIG. It is a perspective view which shows the 1st blowing mode switching door of 2nd Embodiment. It is a perspective view which shows the 1st blowing mode switching door of 3rd Embodiment. It is a perspective view which shows the 1st blowing mode switching door of 4th Embodiment. It is a perspective view which shows the sealing structure of the plate door by a study example.

Explanation of symbols

11 ... Case, 23, 24 ... First and second communication ports (openings),
23a, 24a ... 1st, 2nd case side sealing surface (case side sealing surface),
28 ... 1st blowing mode switching door (door), 28a ... rotating shaft, 28b ... door main-body part,
30 ... concave shape part, 31 ... door side sealing surface.

Claims (3)

A case (11) forming the opening (23, 24) of the air passage;
A door (28) disposed in the case (11) and opening and closing the openings (23, 24);
The door (28) includes a rotation shaft (28a) rotatably supported with respect to the case (11), and a door main body (28b) that rotates integrally with the rotation shaft (28a).
The door body (28b) is formed in a concave shape (30) that is recessed in the door rotation direction, and a planar shape that extends in the direction intersecting the door rotation direction at the edge of the concave shape (30). A door-side sealing surface (31),
An air conditioner for vehicles, wherein a planar case-side sealing surface (23a, 24a) is formed at the edge of the opening (23, 24). The concave portion (30) is a rectangular shape whose planar shape extends in parallel with the rotation axis (28a),
The door-side sealing surface (31) has a rectangular frame shape that protrudes outward from the concave shape portion (30) from the entire edge of the concave shape portion (30).
The said door main-body part (28b) is combined with the said rotating shaft (28a) in the site | part extended in parallel with the said rotating shaft (28a) among the said door side sealing surfaces (31). The vehicle air conditioner according to 1. The concave portion (30) is a rectangular shape whose planar shape extends in parallel with the rotation axis (28a),
The door main body (28b) is coupled to the rotating shaft (28a) at a portion extending in parallel with the rotating shaft (28a) among the edges of the concave-shaped portion (30).
The door-side sealing surface (31) protrudes outward of the concave shape portion (30) from a portion of the edge portion of the concave shape portion (30) excluding a portion coupled to the rotating shaft (28a). The vehicular air conditioner according to claim 1, wherein the vehicular air conditioner has a U-shape.

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