JP2008254488A - Air passage opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the sealing property of the neighborhood of a parting face without increasing door operation force. <P>SOLUTION: The air passage opening/closing device is provided with: a case 11 for forming openings 21, 23 of the air passage; and a door 28 arranged in the case 11 and opening/closing the openings 21, 23, and the door 28 is constituted of: a rotation shaft 28a; a door base plate part 28b; and plate-like elastic sealing materials 28c, 28d. Case side seal surfaces 21a, 23a pressed with the elastic sealing materials 28c, 28d are formed on peripheral edges of the openings 21, 23, and the case 11 is constituted such that a plurality of division cases 11a, 11b divided by the parting face S extending in a direction crossing to the rotation shaft 28a are integrally fastened. The case side seal surfaces 21a, 23a are divided by the parting face S and are formed to a plurality of division cases 11a, 11b. The elastic sealing materials 28c, 28d have a protuberance shape that a portion opposed to the parting face S in a rotation shaft 28a direction is protruded toward the case side seal surfaces 21a, 23a than the other portion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

  Conventionally, a plate-like door that opens and closes an air passage has a thin plate-like packing made of a porous resin elastic material such as urethane foam on a plate surface of a rigid door substrate portion, and the door substrate portion and the case side ( The seal is elastically compressed and deformed between the sealing surface and the air passage side to ensure door sealing (for example, see Patent Document 1).

  In this prior art, the part to which the packing is attached in the door substrate portion has a planar shape parallel to the door rotation axis, and the thickness of the packing is constant. For this reason, the packing has a planar shape parallel to the door rotation axis in a state where the packing is affixed to the door substrate portion.

  Further, in general, a case forming an air passage has a split surface extending in a direction perpendicular to the door rotation axis for reasons of die cutting for molding, reasons for assembling the door in the case, and the like. The two divided cases are integrally fastened after being divided into two divided cases.

In order to integrally form the case-side seal surface into the two divided cases, the case-side seal surface is also divided by the divided surfaces. For this reason, the case side seal surface is set with a slight angle (2-3 °) inclination (so-called draft angle) with respect to the plane parallel to the mold drawing direction for the convenience of die cutting. With the setting of the draft angle, the case-side sealing surface is inclined so that the vicinity of the dividing surface is farther from the door substrate portion than the other parts.
Japanese Utility Model Publication No. 7-5823

  In the prior art of Patent Document 1, since the packing has a flat shape parallel to the door rotation axis, if the draft angle is set on the case-side seal surface, the amount of compressive deformation of the packing is relatively near the split surface. In other words, a so-called “one-sided” occurs. For this reason, the sealing performance tends to be lowered near the dividing surface.

  In particular, when the door substrate is deformed so that it is pushed back due to the repulsive force of the packing, or when the durability of the packing deteriorates, between the packing and the case-side seal surface near the split surface where the amount of compressive deformation of the packing is small. This creates a problem because a gap is generated and wind leakage occurs.

  As a countermeasure, it is possible to increase the amount of compressive deformation of the packing in the vicinity of the dividing surface by strongly pressing the door substrate portion against the case side sealing surface, and to improve the sealing performance in the vicinity of the dividing surface.

  However, this measure has a problem that the door operation force increases because the door substrate portion must be strongly pressed against the case-side sealing surface.

  In view of the above points, an object of the present invention is to improve the sealing performance in the vicinity of a dividing surface without increasing the door operating force.

In order to achieve the above object, the present invention comprises a case (11) that forms air passage openings (21, 23);
A door (28) disposed in the case (11) and opening and closing the openings (21, 23);
The door (28) includes a rotating shaft (28a) rotatably supported with respect to the case (11), a door substrate portion (28b) rotating integrally with the rotating shaft (28a), and a door substrate portion (28b). A plate-like elastic sealing material (28c, 28d) arranged so as to overlap the plate surface of
Case-side sealing surfaces (21a, 23a) to which the elastic sealing materials (28c, 28d) are pressure-bonded are formed on the peripheral portions of the openings (21, 23).
The case (11) is configured to integrally fasten a plurality of divided cases (11a, 11b) divided by a dividing surface (S) extending in a direction intersecting the rotation axis (28a).
The case-side sealing surfaces (21a, 23a) are divided into dividing surfaces (S) and formed into a plurality of divided cases (11a, 11b).
The elastic sealing material (28c, 28d) has a raised shape in which the portion facing the dividing surface (S) is raised toward the case side sealing surface (21a, 23a) side than the other portion in the direction of the rotation axis (28a). It is characterized by having.

  According to this, since the elastic sealing material (28c, 28d) has a raised shape, the amount of compressive deformation of the elastic sealing material (28c, 28d) can be reduced between the part facing the dividing surface (S) and the other part. Can be made uniform. For this reason, the sealing performance in the vicinity of the dividing surface (S) can be improved without increasing the door operating force.

  Specifically, in the present invention, the raised shape is a shape that inclines linearly toward the case-side sealing surfaces (21a, 23a) as it goes from both ends toward the center in the direction of the rotation axis (28a). is there.

  As a result, the protruding shape of the elastic sealing material (28c, 28d) can be brought close to the draft shape of the case-side sealing surface (21a, 23a), so the amount of compressive deformation of the elastic sealing material (28c, 28d) can be made more uniform. Can be

  In the present invention, the raised shape is formed over the entire area of the elastic sealing material (28c, 28d) in the direction of the rotation axis (28a).

  As a result, the protruding shape of the elastic sealing material (28c, 28d) can be brought close to the draft shape of the case-side sealing surface (21a, 23a), so the amount of compressive deformation of the elastic sealing material (28c, 28d) can be made more uniform. Can be

In the present invention, specifically, the thickness of at least one of the door base plate portion (28b) and the elastic sealing material (28c, 28d) is opposed to the dividing surface (S) in the direction of the rotation axis (28a). Set to be thicker toward the case side seal surface (21a, 23a) side than other parts,
The elastic sealing material (28c, 28d) has a raised shape depending on the thickness setting.

  Thereby, a protruding shape can be provided in the elastic sealing material (28c, 28d) with a simple configuration.

  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. FIG. 1 is a cross-sectional view of an air conditioning unit 10 in an indoor unit section of the vehicle air conditioner according to the present embodiment. Further, the up and down arrows and the front and rear arrows in FIG. 1 indicate directions in the vehicle-mounted state of the air conditioning unit 10. FIG. 1 shows a foot / diff mode which will be described later.

  The indoor unit portion of the present embodiment is roughly divided into an air conditioning unit 10 in FIG. 1 and a blower unit (not shown) that blows air to the air conditioning unit 10. The air conditioning unit 10 is disposed at a substantially central portion in the vehicle width direction inside an instrument panel (not shown) on the front side of the vehicle interior. On the other hand, the blower unit (not shown) is arranged offset from the center part to the passenger seat side in the inside of the instrument panel in the front part of the passenger compartment.

  As is well known, the blower unit is configured by an inside / outside air switching box for switching between outside air (vehicle exterior air) and inside air (vehicle interior air), and a blower that sucks and blows air through the inside / outside air switching box. The This blower drives a known centrifugal multiblade fan (sirocco fan) with an electric motor. The electric motor is operated by a control signal from an air conditioning control device (not shown).

  The air conditioning unit 10 includes an air conditioning case 11, and an air passage through which air flows toward the vehicle interior is configured inside the air conditioning case 11. The air conditioning case 11 is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength.

  The air conditioning case 11 is divided into a vehicle vertical direction at a substantially central portion in the vehicle width direction (perpendicular to the plane of FIG. 1) for reasons such as die-cutting for molding, and reasons for assembling the air conditioning equipment in the case. It has a surface S (see FIG. 3A), and is divided into two divided case bodies 11a and 11b on the left and right sides at the dividing surface S.

  The two right and left divided case bodies 11a and 11b include an evaporator 12 that forms a cooling heat exchanger, a heater core 13 that forms a heating heat exchanger, an air mix door 16, a defroster door 28, a face In a state where the foot door 31 and the like are accommodated, they are integrally coupled by a fastening means such as a metal spring clip or a screw.

  An air inlet space 14 indicated by a broken line in FIG. 1 is formed at the most front portion of the air conditioning case 11, and air blown by the blower of the blower unit flows into the air inlet space 14. Further, the evaporator 12 is disposed in a substantially vertical direction (substantially vertical) immediately after the air flow downstream of the air inlet space 14. As is well known, the evaporator 12 absorbs heat from the air and cools the air when the low-pressure refrigerant in the refrigeration cycle (not shown) evaporates.

  A drain outlet 15 for draining condensed water (drain water) generated in the evaporator 12 is opened at the lowest part of the air conditioning case 11 located below the evaporator 12.

  A heater core 13 is arranged in a substantially vertical direction (substantially vertical) at a predetermined interval on the air flow downstream side (vehicle rear side) of the evaporator 12. The heater core 13 heats cold air by introducing high-temperature engine cooling water (hot water) into the interior and exchanging heat between the hot water and the cold air that has passed through the evaporator 12.

  The heater core 13 is also arranged in a substantially vertical direction, but is arranged with a slight inclination from the lower side to the vehicle rear side. Thereby, the rotation operation space of the plate-shaped air mix door 16 is ensured.

  The hot air passage 17 is a passage that guides the hot air that has passed through the heater core 13 to the mixing chamber 18, and is formed in a curved shape from the vehicle rear side portion of the heater core 13 to the upper portion of the heater core 13.

  A cold air bypass passage 19 is formed in parallel with the hot air passage 17 in the vehicle rear side portion of the evaporator 12 of the air conditioning case 11 and in the upper portion of the heater core 13. The cold air bypass passage 19 constitutes a passage through which the cold air after passing through the evaporator 12 flows around the heater core 13. A mixing chamber 18 that mixes the cold air (arrow A) that has passed through the cold air bypass passage 19 and the warm air (arrow B) that has passed through the heater core 13 is disposed downstream of the cold air bypass passage 19 (above the vehicle). .

  An air mix door 16 serving as a temperature adjusting means is disposed between the evaporator 12 and the heater core 13 and at a lower portion of the cold air bypass passage 19. The air mix door 16 adjusts the air flow rate ratio between the cold air flowing into the hot air passage 17 and the cold air passing through the cold air bypass passage 19 by adjusting the opening degree of the cold air bypass passage 19 and the heater core inlet ventilation passage 20.

  The air mix door 16 is a rotary door having a rotating shaft 16a that is rotatably supported with respect to the air conditioning case 11, and a resin door substrate portion 16b that is coupled to the rotating shaft 16a.

  The rotating shaft 16a is disposed to extend in the vehicle width direction at a vehicle front side portion of the upper end portion of the heater core 13, and is rotatably supported by bearing holes (not shown) on the left and right wall surfaces of the air conditioning case 11. One end of the rotating shaft 16a protrudes outside the air conditioning case 11, and is connected to an electric actuator (not shown) via a link mechanism (not shown). This electric actuator is operated by a control signal of an air conditioning control device (not shown).

  Therefore, in this embodiment, the air mix door 16 is rotated by the electric actuator. Of course, a manual method in which the air mix door 16 is directly rotated by the manual operation force of the passenger may be employed.

  Thin plate-like packings (not shown) made of a porous resin elastic material such as urethane foam are attached to both front and back surfaces of the door substrate portion 16b of the air mix door 16. Case-side seal surfaces 19 a and 20 a to which the packing of the air mix door 16 is pressure-bonded are formed at the peripheral edge portions of the cold air bypass passage 19 and the heater core inlet ventilation passage 20. The packing is elastically compressed and deformed between the door substrate portion 16b and the case-side seal surfaces 19a and 20a to ensure door sealability.

  In FIG. 1, the solid line position of the air mix door 16 is a maximum heating position in which the hot air passage 17 is fully opened and the cold air bypass passage 19 is fully closed. In this maximum heating position, all of the cold air that has passed through the evaporator 12 is located. The air volume passes through the heater core 13 and is heated.

  The position of the two-dot chain line of the air mix door 16 is the maximum cooling position where the hot air passage 17 is fully closed and the cold air bypass passage 19 is fully opened. At this maximum cooling position, the total amount of cold air passing through the evaporator 12 is It flows to the cold air bypass passage 19 side.

  The air mix door 16 is heated by the cold air (arrow A) passing through the cold air bypass passage 19 and the heater core 13 by being rotated to an arbitrary intermediate opening position between the solid line position and the two-dot chain line position. The air volume ratio with the warm air (arrow B) is adjusted.

  The mixing chamber 18 shown by the broken line in FIG. 1 is cold air (arrow A) that has passed through the above-described cold air bypass passage 19 in the upper portion of the space in which the air mix door 16 between the evaporator 12 and the heater core 13 rotates. And it arrange | positions so that the warm air (arrow B) which passed the warm air channel | path 17 can flow in.

  In the mixing chamber 18, the hot air (arrow B) and the cold air (arrow A) that flow in are mixed and the temperature of the conditioned air blown from the mixing chamber 18 into the vehicle compartment is adjusted. Therefore, the temperature of the conditioned air can be adjusted to a desired temperature by adjusting the opening position of the air mix door 16 described above.

  Next, a defroster opening 21 is disposed in a substantially upper part of the mixing chamber 18 on the upper surface of the air conditioning case 11. The defroster opening 21 is connected to a defroster outlet (not shown) disposed in the vehicle compartment via a defroster duct (not shown), and air-conditioned air (mainly from the defroster outlet toward the inner surface of the vehicle window glass). Hot air) is blown out.

  A face opening 22 is disposed behind the defroster opening 21. The conditioned air whose temperature is adjusted flows out from the mixing chamber 18 through the communication port 23 into the face opening 22. The communication port 23 is disposed immediately above the outlet portion 17 a of the hot air passage 17. The defroster opening 21 and the communication port 23 correspond to the opening in the present invention.

  The face opening 22 is connected to a face air outlet (not shown) disposed in the passenger compartment via a face duct (not shown), and air-conditioned air (mainly from the face air outlet toward the upper body side of the occupant). Cold wind) is blown out.

  A foot passage 24 communicating with the communication port 23 is formed on the vehicle rear side of the warm air passage 17 so as to hang downward from above. The foot passage 24 is formed so as to hang downward from above.

  A part of the upper end of the foot passage 24 is opened to form the foot passage inlet 25. The foot passage 24 is formed over almost the entire region in the vehicle width direction inside the case. Foot opening portions 26 are opened at the left and right end portions of the foot passage 24 in the vehicle width direction, that is, at both the left and right side portions of the air conditioning case 11, which are upper ends of the foot passage 24. A foot duct (not shown) that hangs downward is connected to each of the left and right foot openings 26, and air is blown out from the foot outlet at the lower end of the foot duct to the feet of the front seat occupant. ing.

  A rear foot opening 27 is opened at the downstream end (lower end) of the air passage 24 in the air flow direction. A rear foot duct (not shown) extending rearward of the vehicle is connected to the rear foot opening 27, and air is blown out from the rear foot outlet at the front end of the rear foot duct to the feet of the rear seat occupant. .

  Next, a defroster door 28 for opening and closing the defroster opening 21 and the communication port 23 is disposed above the mixing chamber 18. The defroster door 28 corresponds to the door in the present invention.

  The defroster door 28 is a rotary door having a rotating shaft 28a and a door base plate portion 28b coupled to the rotating shaft 28a. The rotating shaft 28a has a defroster opening 21 on the vehicle rear side and a face opening 22 on the vehicle front side. It is arrange | positioned so that it may extend in the vehicle width direction in the site | part between.

  FIG. 2 is a perspective view showing the defroster door 28. Thin plate-like packings 28c and 28d made of a porous resin elastic material such as foamed urethane are attached to both front and back surfaces of the door substrate portion 28b. The packings 28c and 28d correspond to the elastic sealing material in the present invention.

  In this example, the packings 28c and 28d are affixed along the peripheral edge of the door substrate portion 28b. The packings 28c and 28d can be attached to the door substrate portion 28b with an adhesive, a double-sided tape or the like.

  The packings 28c and 28d are adapted to be crimped to case-side seal surfaces 21a and 23a (FIG. 1) formed at the peripheral portions of the defroster opening 21 and the communication port 23. The packings 28c and 28d are elastically compressed and deformed between the door substrate portion 28b and the case-side seal surfaces 21a and 23a to ensure door sealability.

  FIG. 3 is a schematic cross-sectional view showing a state where the defroster door 28 closes the defroster opening 21 and the packings 28c and 28d are compressed and deformed between the door substrate portion 28b and the case-side sealing surface 21a. FIG. 3A is a cross-sectional view of a surface perpendicular to the case-side seal surface 21a and parallel to the rotation shaft 28a, and FIG. 3B is a cross-sectional view of a surface orthogonal to the rotation shaft 28a. In FIG. 3, the two-dot chain line of the packing 28 c indicates the shape before compression deformation.

  The case-side sealing surfaces 21a and 23a are integrally formed with the left and right divided case bodies 11a and 11b. Accordingly, the case-side sealing surfaces 21a and 23a have a dividing surface S extending in the vehicle vertical direction (direction orthogonal to the rotation shaft 28a) at a substantially central portion in the vehicle width direction (direction of the rotation shaft 28a). In FIG. 3A, only the case-side seal surface 21a is shown, and the case-side seal surface 23a is the same as the case-side seal surface 21a, and is not shown.

  For the case-side sealing surfaces 21a and 23a, an inclination (so-called draft angle) of a slight angle (2 to 3 °) is set with respect to a plane parallel to the mold drawing direction for convenience of die cutting. As the draft angle is set, the case-side sealing surfaces 21a and 23a have a shape in which the vicinity of the dividing surface S is inclined toward the opposite side of the door substrate portion 28b from other portions.

  On the other hand, the packings 28c and 28d of the defroster door 28 are also provided with raised shapes corresponding to the drafts of the case-side seal surfaces 21a and 23a. More specifically, raised shapes corresponding to the drafts of the case-side seal surfaces 21a and 23a are provided on both the front and back surfaces of the door substrate portion 28b.

  In this example, by increasing the thickness of the door substrate portion 28b toward both the front and back sides of the door substrate portion 28b from both ends toward the substantially central portion in the direction of the rotation axis 28a, both front and back surfaces of the door substrate portion 28b are obtained. Has a raised shape. The raised shape of the door substrate portion 28b is formed over the entire door substrate portion 28b.

  Then, by attaching the packings 28c and 28d to the door substrate portion 28b, the packings 28c and 28d are raised along the raised shape of the door substrate portion 28b.

  Here, the raised shape of the door substrate portion 28b is linearly inclined at the same angle as the draft, and the thickness of the packings 28c and 28d is set to be constant. For this reason, the protruding shape provided in the packings 28c and 28d corresponds to the draft of the case-side seal surfaces 21a and 23a.

  As shown in FIG. 1, a face / foot door 31 that opens and closes the face opening 22 and the foot passage entrance 25 is disposed below the face opening 22 and above the foot passage entrance 25. The face / foot door 31 is a rotary door having a rotary shaft 31a and a door base plate portion 31b coupled to the rotary shaft 31a. The rotary shaft 31a is located at the face opening 22 on the vehicle rear side and above the foot passage inlet 25. It arrange | positions so that it may extend in the vehicle width direction in the site | part of a side.

  Thin plate packing (not shown) made of a porous resin elastic material such as urethane foam is attached to both the front and back surfaces of the door substrate portion 31b of the face / foot door 31. The packing is pressure-bonded to case-side sealing surfaces 22 a and 25 a (FIG. 1) formed at the periphery of the face opening 22 and the foot passage inlet 25. The packing is elastically compressed and deformed between the door substrate portion 31b and the case-side seal surfaces 22a and 25a to ensure door sealability.

  Although not shown, the configuration of the face / foot door 31 is the same as that of the defroster door 28. Therefore, the packing of the face / foot door 31 is provided with a raised shape corresponding to the draft of the case-side sealing surfaces 22a, 25a.

  The rotation shaft 28a of the defroster door 28 and the rotation shaft 31a of the face / foot door 31 are rotatably supported by bearing holes (not shown) on the left and right wall surfaces of the air conditioning case 11, and the rotation shafts 28a, 31a One end protrudes outside the air conditioning case 11 and is coupled to a common electric actuator (not shown) via a link mechanism.

  This electric actuator is operated by a control signal of the air conditioning control device. Therefore, in the present embodiment, the defroster door 28 and the face / foot door 31 are rotationally operated in conjunction with a common electric actuator, and constitute a blowing mode door that switches a blowing mode for blowing conditioned air into the vehicle interior. .

  In addition, the air conditioning control apparatus which controls the electric actuator which rotates the electric motor of an air blower unit, the electric actuator which rotates the air mix door 16, and the blowing mode doors 30 and 31 is well-known micro | micron | matter including CPU, ROM, RAM, etc. Consists of a computer and its peripheral circuits, sensor detection signals are input from various air conditioning sensor groups (not shown), and an air conditioning operation panel (not shown) arranged near the instrument panel in the front of the passenger compartment Operation signals are input from various air conditioning operation switches (not shown) provided.

  Next, the operation of this embodiment in the above configuration will be described. When an auto switch (not shown) of the air conditioning operation panel is turned on while a start switch (ignition switch) of a vehicle engine (not shown) is turned on, an air conditioner control program stored in the ROM of the air conditioning control device is executed.

  When the air conditioner control program is executed, operation signals on the air conditioning operation panel and detection signals detected by various air conditioning sensor groups are read. And based on these signals, the target blast volume of the air blown by the blower, the inside / outside air mode, the blowing mode, the target opening of the air mix door 16, the operation of the compressor, etc. are determined, and the determined control state is Control signals are output to various actuators so as to be obtained.

  Here, the blowing mode is determined with reference to a control map stored in advance in the air conditioning control device, and is sequentially switched to the face mode, the bi-level mode, and the foot mode. In addition, when a blow mode switch (not shown) on the air conditioning operation panel is manually operated, in addition to the face mode, the bi-level mode, and the foot mode described above, the foot differential mode and the defroster mode are set according to the operation signal. Switched. Hereinafter, the operation of the vehicle air conditioner in each blowing mode will be described.

  First, the face mode is a mode in which conditioned air is blown from the face outlet toward the upper body side of the occupant. In this face mode, the defroster door 28 is rotated to the two-dot chain line position C in FIG. 1, and the face / foot door 31 is rotated to the two-dot chain line position in FIG. As a result, the defroster door 28 fully closes the defroster opening 21, fully opens the communication port 23, the face / foot door 31 fully opens the face opening 22, and fully closes the foot opening 26.

  In the face mode, the cool air is mainly blown out from the face air outlet, so that the air mix door 16 is at the maximum cooling position (the two-dot chain line position in FIG. 1) and the cold air bypass passage 19 is fully opened. Of course, the air-mix door 16 may be blown out of the face air outlet by mixing the cold air and the hot air in the mixing chamber 18 with the air mix door 16 at the intermediate opening position.

  Next, the bi-level mode is a mode in which conditioned air is blown from the face air outlet toward the occupant's upper body, and at the same time, conditioned air is blown from the foot air outlet toward the feet of the occupant. In this bi-level mode, the defroster door 28 is rotated to the two-dot chain line position C in FIG. 1, the defroster opening 21 is fully closed, the communication port 23 is fully opened, and the face / foot door 31 is rotated to the intermediate opening position. Operated to open both the face opening 22 and the foot opening 26 to the same extent. Note that, in the bi-level mode, the air mix door 16 is positioned at the intermediate opening position in order to blow out the conditioned air at a temperature according to the passenger's preference from the face outlet and the foot outlet.

  Next, the foot mode is a mode in which conditioned air is blown out mainly from the foot outlet and the rear foot outlet toward the occupant's feet. In this foot mode, the defroster door 28 is rotated to a position where the communication port 23 is opened while the defroster opening 21 is slightly opened. Further, the face / foot door 31 is rotated to the solid line position in FIG. 1 to fully close the face opening 22 and fully open the foot passage entrance 25. Since the foot mode is mainly selected when the outside temperature of the vehicle is low, the defroster door 28 is in a state in which the defroster opening 21 is slightly opened to prevent the vehicle window glass from fogging.

  In the foot mode, in order to blow out warm air mainly from the foot outlet and the rear foot outlet, the air mix door 16 is set to the maximum heating position (solid line position in FIG. 1), and the cold air bypass passage 19 is fully closed. Of course, the conditioned air in which the cold air and the hot air are mixed may be blown out in the mixing chamber 18 at the intermediate opening position.

  Next, the foot / def mode is a mode in which conditioned air is blown simultaneously from the defroster outlet, the foot outlet, and the rear foot outlet toward the vehicle window glass side and the occupant's foot side. In the foot / def mode, the defroster door 28 is rotated to an opening position (a solid line position in FIG. 1) that opens both the defroster opening 21 and the communication port 23 to approximately the same degree. The opening 22 is rotated to a position where the opening 22 is fully closed (solid line position in FIG. 1). In the present embodiment, the ratio of the opening degree between the defroster opening 21 and the communication hole 23 is about 5: 5.

  Since the foot / def mode is a mode selected by the operation of the occupant, the position of the air mix door 16 is used to blow the conditioned air at a temperature according to the passenger's preference from the defroster outlet, the foot outlet, and the rear foot outlet. Is the intermediate opening position.

  Next, the defroster mode is a mode in which conditioned air is blown from the defroster outlet toward the vehicle window glass side. In the defroster mode, the defroster door 28 is rotated to the two-dot chain line position D in FIG. 1 to fully open the defroster opening 21 and fully close the communication port 23.

  Since the defroster mode is a mode selected by the operation of the occupant, the position of the air mix door 16 is the intermediate opening position in order to blow out the conditioned air at a temperature according to the passenger's preference from the defroster outlet.

  In the present embodiment, the packing 28 c of the defroster door 28 has a raised shape corresponding to the draft of the case-side seal surface 21 a at the periphery of the defroster opening 21. For this reason, when the defroster door 28 closes the defroster opening 21, the packing 28c can be uniformly compressed and deformed to the case-side seal surface 21a in the direction of the rotation shaft 28a.

  In other words, the packing 28c can be prevented from hitting the case-side seal surface 21a. As a result, the sealing performance at the defroster opening 21 can be improved without increasing the operating force of the defroster door 28.

  Further, since the packing 28c can be uniformly compressed and deformed to the case-side seal surface 21a, the repulsive force due to the compression of the packing 28c does not occur unevenly. Moreover, the packing 28c has a shape along the draft of the case-side seal surface 21a.

  For this reason, even if the door substrate portion 28b is deformed so as to be pushed back by the repulsive force of the packing 28c or the durability of the packing 28c is deteriorated, the packing 28c and the case-side seal surface 21a near the split surface S. It is possible to prevent the occurrence of a gap between them, thereby preventing the occurrence of wind leakage.

  Similarly, since the packing 28d of the defroster door 28 has a raised shape corresponding to the draft of the case-side sealing surface 23a at the periphery of the communication port 23, when the defroster door 28 closes the communication port 23, the direction of the rotary shaft 28a The packing 28d can be uniformly compressed and deformed on the case-side seal surface 23a. As a result, the sealing performance at the communication port 23 can be improved without increasing the operating force of the defroster door 28.

  Although not shown, the face / foot door 31 also has a raised shape corresponding to the draft angle of the case-side seal surfaces 22a and 25a at the periphery of the face opening 22 and the foot passage inlet 25 as in the case of the defroster door 28. Therefore, the sealing performance at the face opening 22 and the foot passage entrance 25 can be improved without increasing the door operating force of the face / foot door 31.

(Second Embodiment)
In the first embodiment, the thickness of the door substrate portion 28b of the defroster door 28 is changed in the direction of the rotation shaft 28a, and the thickness of the packings 28c and 28d is made constant. However, in the second embodiment, FIG. As shown in FIG. 4, the thickness of the door substrate portion 28b is made constant, and the thickness of the packings 28c, 28d is increased from both ends toward the substantially central portion in the direction of the rotation shaft 28a.

  As a result, similar to the first embodiment, the packings 28c and 28d can be provided with a raised shape corresponding to the draft angle of the case-side seal surfaces 21a and 23a. Therefore, the same effects as those of the first embodiment can be obtained. It can be demonstrated.

(Other embodiments)
In the first embodiment, the door substrate portion 28b is entirely provided with a gradient shape. However, the door substrate portion 28b is provided with a gradient shape only at the portion where the packings 28c and 28d are attached, and the packings 28c and 28d are attached. Parts other than the attachment part may be flat without a gradient shape.

  Further, in the first embodiment, the wall thickness of the door substrate portion 28b is changed in the direction of the rotation axis 28a in order to provide a raised shape on the door substrate portion 28b. For example, a hollow portion is provided in the door substrate portion 28b. The height of the hollow portion (dimension in the front and back direction of the door substrate portion 28b) is increased in the direction of the rotation shaft 28a from both ends toward the substantially central portion, thereby raising the both sides of the door substrate portion 28b. May be provided.

  Further, in each of the above embodiments, the raised shape of the packings 28c and 28d is linearly inclined at the same angle as the draft of the case-side seal surfaces 21a and 23a, but is not limited thereto. Instead, for example, a curved shape that approximates the draft of the case-side sealing surfaces 21a and 23a may be used.

  Moreover, in each said embodiment, although the protruding shape of packing 28c, 28d is provided over the rotating shaft 28a direction whole region of packing 28c, 28d, it is not limited to this, The protruding shape of packing 28c, 28d is As long as it is provided at least at a portion of the packings 28c and 28d that faces the dividing surface S, the sealing performance in the vicinity of the dividing surface S can be improved.

  Moreover, although each said embodiment showed the example which comprised the door in this invention by the door which opens and closes two opening parts 21 and 23 by the front and back both surfaces of the door board | substrate part 28b, it is not limited to this. Instead, the door in the present invention may be configured by a door that opens and closes one opening only on one side of the door substrate portion. In this case, it goes without saying that the packing need only be attached to one side of the door substrate portion.

  Moreover, in each said embodiment, although the example in which the door in this invention was comprised by the cantilever door which has arrange | positioned the rotating shaft 28a to the one end part of the door baseplate part 28b is shown, it is not limited to this, You may comprise the door in this invention by the butterfly door which has arrange | positioned the rotating shaft in the center part of the door board | substrate part.

  Moreover, in each said embodiment, although this invention is applied to the blowing mode switching door of a vehicle air conditioner, it is not limited to this, For an air mix door of a vehicle air conditioner, an inside / outside air switching door, etc. The present invention can be applied.

  Furthermore, for example, 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 of the defroster door of FIG. In 1st Embodiment, it is a schematic sectional drawing which shows the state which the defroster door closed the defroster opening part. In 2nd Embodiment, it is a schematic sectional drawing which shows the state which the defroster door closed the defroster opening part.

Explanation of symbols

11a, 11b ... split case, 21a, 23a ... case side sealing surface,
28 ... Defroster door (door), 28a ... Rotating shaft, 28b ... Door substrate part,
28c, 28d ... packing (elastic sealing material), S ... dividing surface.

Claims (4)

A case (11) forming an opening (21, 23) of the air passage;
A door (28) disposed in the case (11) and opening and closing the openings (21, 23);
The door (28) includes a rotating shaft (28a) rotatably supported with respect to the case (11), a door substrate portion (28b) rotating integrally with the rotating shaft (28a), and the door substrate. A plate-like elastic sealing material (28c, 28d) disposed so as to overlap the plate surface of the portion (28b),
Case-side sealing surfaces (21a, 23a) to which the elastic sealing materials (28c, 28d) are pressure-bonded are formed on the peripheral portions of the openings (21, 23).
The case (11) is configured to integrally fasten a plurality of divided cases (11a, 11b) divided by a dividing surface (S) extending in a direction intersecting the rotating shaft (28a),
The case-side sealing surfaces (21a, 23a) are divided into the divided surfaces (S) and formed into the plurality of divided cases (11a, 11b),
In the elastic seal material (28c, 28d), in the direction of the rotation axis (28a), the portion facing the split surface (S) is directed toward the case side seal surface (21a, 23a) side than the other portions. An air passage opening and closing device characterized by having a raised shape. In the direction of the rotation axis (28a), the protruding shape is a shape that linearly inclines toward the case-side sealing surfaces (21a, 23a) from the both end sides toward the center side. The air passage opening and closing device according to claim 1. 3. The air passage opening and closing device according to claim 1, wherein the raised shape is formed over the entire area of the elastic sealing material (28 c, 28 d) in the direction of the rotation axis (28 a). The thickness of at least one of the door base plate part (28b) and the elastic sealing material (28c, 28d) is such that the part facing the dividing surface (S) in the direction of the rotation axis (28a) is more than the other part. Is also set to be thicker toward the case side sealing surface (21a, 23a) side,
The air passage opening and closing device according to any one of claims 1 to 3, wherein the elastic sealing material (28c, 28d) has the raised shape according to the thickness setting.

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