JP2019127134A - Vehicle air conditioner - Google Patents

Abstract

To reduce collision sound when an opening is closed by a damper in a vehicle air conditioner.SOLUTION: An air conditioning case 14 of a vehicle air conditioner 10 is provided with a vent adjustment damper 44 which adjusts an air blast volume from an air vent 22 to a vehicle cabin. A tip of the vent adjustment damper 44 includes: a deformable seal member 60 formed by an elastic material; and a protruding lip part 62 protruding further than a tip of the seal member 60. When the vent adjustment damper 44 rotates to contact with the air conditioning case 14, the protruding lip part 62 contacts with the air conditioning case 14 prior to the seal member 60 and is formed so that a contact area between the protruding lip part 62 and a seal wall 68 becomes smaller than a contact area between the seal member 60 and a seal surface 66.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioner that is mounted on a vehicle and blows air whose temperature has been adjusted by a heat exchanger in an air conditioning case into the vehicle interior to adjust the temperature of the vehicle interior.

  2. Description of the Related Art Conventionally, a vehicle air conditioner mounted on a vehicle takes in inside and outside air by an air blower into an air conditioning case having an air passage formed therein, and air cooled by an evaporator as a cooling means and a heater core as a heating means. After driving the heated air and the air mix door to mix in a desired mixing ratio in the air conditioning case, for example, by blowing air from a plurality of openings provided in the air conditioning case through the air duct into the vehicle interior Temperature and humidity adjustments are made.

  In such a vehicle air conditioner, for example, as disclosed in Patent Document 1, there is provided a butterfly door that opens and closes a face blowout opening, a defroster blowout opening, and a foot blowout opening in a case. And a sealing material for covering the outer peripheral edge of the door substrate portion, and provided rotatably in the case via rotation shafts provided at both ends in the width direction of the door substrate portion. Yes. Then, the butterfly door rotates with the rotation axis as a fulcrum, and the seal material contacts the door contact surface of the case, thereby switching the open / close state of the opening such as the face outlet.

JP 2004-74945 A

  However, in the butterfly door of the above-described vehicle air conditioner, since the seal member is formed of an elastic material such as rubber, silicone rubber, thermoplastic elastomer or the like which does not undergo compression deformation, the seal material is closed when the butterfly door is closed. When the door contact surface of the case abuts at high speed, the impact is not absorbed and a collision sound is generated, which causes a problem of giving discomfort to the occupants in the vehicle compartment.

  The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a vehicular air-conditioning system capable of reducing the collision noise when the opening is closed by the damper.

To achieve the above object, the present invention provides a vehicle air conditioner having a casing having a passage through which air flows and a damper for opening and closing an opening of the casing.
The damper includes a shielding plate that closes the opening;
A rotating shaft provided on the shielding plate and rotatably supporting the shielding plate with respect to the casing;
A seal member made of a rubber material that is provided at the tip of the shielding plate that is orthogonal to the extending direction of the rotation shaft and that comes into contact with the seal surface of the casing formed at the periphery of the opening;
It is provided at the tip of the seal member, and abuts against the casing before the seal member abuts on the seal surface at the time of closing the opening, and with respect to the casing with a contact area smaller than the contact area A projection that abuts
And the like.

  According to the present invention, the damper that opens and closes the opening of the casing is provided with the sealing member made of a rubber material at the tip of the shielding plate that closes the opening, and comes into contact with the sealing surface formed on the periphery of the opening. The front end of the housing includes a projecting portion that contacts the casing before the seal member contacts the sealing surface of the casing when the opening is closed, and a contact area between the projecting portion and the casing is the sealing member and the sealing surface. It is formed to be smaller than the contact area.

  Therefore, when the damper abuts against the sealing surface of the casing and closes the opening, the protrusion comes into contact with the casing before the sealing member, and the contact area is smaller than that of the sealing member. The impact when the seal member made of the material comes into contact with the seal surface is preferably mitigated, and the collision noise can be reduced.

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

  That is, a damper that opens and closes the opening of the casing in the vehicle air conditioner is provided with a seal member made of a rubber material at the tip of the shielding plate that closes the opening, and the seal member contacts the sealing surface of the casing when the opening is closed. Since the protrusion that contacts the casing before contact is provided at the tip of the seal member and the contact area between the protrusion and the casing is smaller than the contact area between the seal member and the seal surface, the damper is When closing the opening by abutting against the sealing surface of the casing, the projecting portion abuts against the casing before the sealing member, so that the collision sound accompanying the impact when the sealing member abuts against the sealing surface is suitably used. It is possible to reduce the passenger discomfort caused by the collision sound.

1 is an overall cross-sectional view of a vehicle air conditioner according to an embodiment of the present invention. FIG. 2A is an enlarged sectional view showing the vicinity of a vent adjustment damper and a case wall in the vehicle air conditioner shown in FIG. 1, and FIG. 2B is an enlarged sectional view of a vent adjustment damper according to a modification.

  The preferred embodiments of the air conditioning system for a vehicle according to the present invention will be described in detail below with reference to the attached drawings. In FIG. 1, reference numeral 10 denotes a vehicle air conditioner according to the embodiment of the present invention. In the following description, the right side (arrow A direction) of the vehicle air conditioner 10 shown in FIG. 1 will be referred to as the front side of the vehicle, and the left side (arrow B direction) will be described as the rear side of the vehicle.

  As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioning case (casing) 14 constituting each air passage 12, and an evaporator 16 disposed inside the air conditioning case 14 to cool the air. The heater core 18 that heats the air and the damper mechanism 20 that switches the flow of air flowing through the passages 12 are included.

  Above the air conditioning case 14, a vent air outlet (opening) 22 for blowing air near the face of the occupant in the vehicle compartment, and a defroster air outlet 24 adjacent to the vent air outlet 22 for blowing air near the front window of the vehicle The air-conditioning case 14 is formed with a foot air outlet 26 for blowing air in the vicinity of the foot of the occupant who opens downward.

  On the other hand, inside the air conditioning case 14, the evaporator 16 is accommodated on the front side (the arrow A direction), and the heater core 18 is accommodated on the downstream side of the evaporator 16, that is, on the rear side (the arrow B direction). Then, air is introduced into the air conditioning case 14 from a blower through a duct (not shown) connected to a position on the upstream side of the evaporator 16, and the air is cooled by passing through the evaporator 16 and passing through the heater core 18. The air is heated.

  Further, the passage 12 in the air conditioning case 14 is a cold air passage 28 in which the evaporator 16 is disposed, a warm air passage 30 formed on the downstream side of the cold air passage 28 and a heater core 18 disposed, and a downstream side of the cold air passage 28 And a bypass passage 32 that bypasses the heater core 18. The cold air passage 28 is connected to the hot air passage 30 through the hot air opening 34 at a substantially central portion of the air conditioning case 14 and is connected to the bypass passage 32 through the cold air opening 36.

  The damper mechanism 20 is provided between the evaporator 16 and the heater core 18 and opens and closes the hot air opening 34. The damper mechanism 20 is provided in the bypass passage 32 downstream of the evaporator 16 and opens and closes the cold air opening 36. Second air mix damper 40, a vent switching damper 42 for switching the air blowing state of the vent air outlet 22 and the defroster air outlet 24, and a vent adjusting damper for adjusting the air blowing amount from the vent air outlet 22 to the vehicle cabin Damper 44 and a foot adjustment damper 46 for adjusting the air flow from the hot air passage 30 to the foot air outlet 26.

  The first and second air mix dampers 38 and 40 have, for example, a butterfly structure in which two blades 50 extend in a direction away from each other around the rotation shaft 48, and the air conditioning case 14 around the rotation shaft 48. Each is rotatably supported by Then, from the fully closed state in which the upper end portion and the lower end portion of the first air mix damper 38 abut on the inner wall portion of the air conditioning case 14, the upper end portion is the evaporator 16 side (arrow A direction) and the lower end portion is the heater core It rotates so that it may approach 18 side (arrow B direction).

  Thereby, the communication state between the cold air passage 28 on the downstream side of the evaporator 16 and the hot air passage 30 on the upstream side of the heater core 18 is switched by opening and closing the hot air opening 34 by the first air mix damper 38. Air flows from the cold air passage 28 to the hot air passage 30 at a predetermined flow rate. Further, in the air conditioning case 14, the second air mix damper 40 communicates the cold air passage 28 formed on the downstream side of the evaporator 16 by opening and closing the cold air opening 36 and the bypass passage 32 bypassing the heater core 18. The air is switched from the cold air passage 28 to the bypass passage 32 at a predetermined flow rate.

  The vent switching damper 42 is formed in a cantilever structure having blades 54 extending in one direction from a rotating shaft 52 supported by the air conditioning case 14, and is ventilated by rotating around the rotating shaft 52. The opening / closing state of the opening 22 and the defroster blower opening 24 is switched.

  The vent adjustment damper 44 is provided at a position facing the vent air outlet 22 as shown in FIGS. 1 to 2A, has a butterfly structure similar to the first and second air mix dampers 38 and 40, and has a rotating shaft 56. A seal member 60 made of an elastic material is provided at the tip of the blade (shield plate) 58 extended from the above, and a projecting lip (projection) 62 is formed at the tip of the seal member 60 further.

  The seal member 60 is formed in a lip shape that can be deformed from, for example, an incompressible elastic material such as an elastomer, and its base end is connected to the tip of the blade 58 and protrudes so as to be in a straight line with the blade 58. And extends along the width direction of the rotating shaft 56. An outer edge portion 64 having a circular cross section is formed at the tip of the seal member 60.

  The protruding lip portion 62 is formed to protrude from the elastic material to the outer edge portion 64 of the sealing member 60 similarly to the sealing member 60, for example, and a plurality of protruding lip portions 62 are provided in the width direction of the sealing member 60. Note that the number of the protruding lip portions 62 is not limited to the case where a plurality of protruding lip portions 62 are provided as described above, and it is sufficient that at least one or more locations are provided.

  The vent adjustment damper 44 rotates counterclockwise about the rotation shaft 56, so that the seal member 60 contacts the seal surface 66 formed inside the air conditioning case 14 as shown in FIG. 2A. The communication between the cold air passage 28 or the bypass passage 32 on the upstream side in contact with the vent air blowing port 22 is blocked, and the projecting lip portion 62 is erected so as to be orthogonal to the seal surface 66. Abut.

  Although the above-described protruding lip portion 62 is described as being provided only on one blade 58 in the vent adjustment damper 44, the invention is not limited to this, and the other blade 58 is also provided in the same manner. It may be Furthermore, not only the vent adjustment damper 44 described above but also the first and second air mix dampers 38 and 40, which are also butterfly structures, and the foot adjustment damper 46 may be provided. It may be provided at the tip of the damper 42. That is, if the air conditioning case 14 is a damper capable of adjusting or switching the flow state of the air flowing through the passage 12 and provided at the tip of the seal member 60, the damper provided with the protruding lip portion 62 is particularly limited. It is not a thing.

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

  First, the case where the cooling operation which lowers the room temperature in the passenger compartment is performed and the air is blown near the passenger's face in the passenger compartment will be described.

  A passenger (not shown) operates the operation button in the passenger compartment to select the cooling operation, so that the first air mix damper 38 is fully closed, the communication between the cold air passage 28 and the hot air passage 30 is interrupted, and The second air mix damper 40 is fully opened, and the cold air passage 28 and the bypass passage 32 are in communication with each other. Further, the vent switching damper 42 rotates toward the defroster air outlet 24, and the vent adjustment damper 44 rotates clockwise about the rotation shaft 56.

  At the same time, air is supplied from the blower not shown to the air conditioning case 14, and the air cooled by passing through the evaporator 16 flows from the cold air passage 28 through the bypass passage 32 to the vent air outlet 22, and The air is blown near the passenger's face.

  Next, when switching from the cooling operation to the heating operation described above, the first air mix damper 38 is rotated from the cooling operation state described above to connect the cold air passage 28 and the hot air passage 30, and the second air By turning the mix damper 40 into a closed state, the communication between the cold air passage 28 and the bypass passage 32 is shut off.

  In addition, the vent switching damper 42 rotates to the vent air outlet 22 side, and the vent adjustment damper 44 rotates counterclockwise around the rotation shaft 56 from the open state shown by the two-dot chain line in FIG. First, after the protruding lip portion 62 abuts on the seal wall 68, the substantially central portion of the seal member 60 is deformed so as to abut against the seal surface 66 and bend. Thereby, the communication between the vent air blowing port 22 and the upstream bypass passage 32 is blocked by the contact between the seal member 60 of the vent adjustment damper 44 and the seal surface 66.

  Under the present circumstances, since the contact area C of the protrusion lip part 62 and the seal wall 68 is set so that it may become smaller than the contact area D of the seal member 60 and the seal surface 66 (C <D), the said protrusion lip The collision sound when the part 62 comes into contact with the seal wall 68 in advance is smaller than the collision sound when the seal member 60 comes into contact with the seal surface 66.

  Thus, by rotating the first air mix damper 38 from the fully closed state, the cold air passage 28 and the hot air passage 30 communicate with each other through the hot air opening 34 and are supplied from the blower (not shown) to the air conditioning case 14. After the air cooled by the evaporator 16 is heated to a predetermined temperature by passing through the heater core 18 from the cold air passage 28, for example, a desired temperature and air flow from the foot air outlet 26 to the vicinity of the occupant's foot in the vehicle compartment It is blown with. At the same time, the communication between the cool air passage 28 and the bypass passage 32 is blocked by the second air mix damper 40, so that the air cooled by the evaporator 16 is prevented from being blown from each air outlet.

  As described above, in the present embodiment, the vent adjustment damper 44 having a butterfly structure is provided so as to be able to open and close freely in the air conditioning case 14 that constitutes the vehicle air conditioner 10. A sealing member 60 made of an elastic material is provided, and a protruding lip portion 62 is provided so as to protrude further from the tip of the sealing member 60, and the protruding lip portion 62 comes into contact with the sealing wall 68 of the air conditioning case 14. The contact area C at that time is set to be smaller than the contact area D when the seal member 60 contacts the seal surface 66.

  As a result, when the vent adjustment damper 44 is closed, the projecting lip 62 is brought into contact with the seal wall 68 before the seal member 60 comes into contact with the seal surface 66 of the air conditioning case 14, and the contact area is determined by the seal member 60. By making it smaller than the above, the impact generated when the seal member 60 made of non-compressed rubber or the like abuts against the seal wall 68 can be suitably mitigated, and the accompanying collision noise can be reduced. As a result, it is possible to reduce occupant discomfort caused by a collision sound generated when the vent adjustment damper 44 is closed.

  Further, the projecting lip portion 62 provided at the tip of the sealing member 60 is not limited to the configuration projecting in a straight line from the tip along the extending direction of the sealing member 60 as described above, for example, As in the vent adjusting damper 80 shown in FIG. 2B, a projecting lip (projecting portion) 82 may be provided which protrudes from the outer edge 64 of the sealing member 60 in the direction orthogonal to the extending direction of the sealing member 60. .

  The projecting lip portion 82 is formed to project toward the sealing surface 66 side of the air conditioning case 14 when the vent adjustment damper 80 is closed, and the tip thereof is formed in a semicircular cross section.

  In addition, the contact area C 'when the protruding lip portion 82 abuts on the sealing surface 66 is set smaller than the contact area D' when the sealing member 60 abuts on the sealing surface 66 (C '<D '). That is, by making the tip of the protruding lip portion 82 into a semicircular cross section, the contact area when contacting the seal surface 66 is reduced.

  Then, after the vent adjustment damper 80 rotates from the open state shown by the two-dot chain line in FIG. 2B, the projecting lip portion 82 projecting toward the seal surface 66 first contacts the seal surface 66, and then the seal member 60. Is deformed so that the substantially central portion thereof is bent in contact with the sealing surface 66. As a result, the seal member 60 seals with the seal surface 66, and the projecting lip portion 82 having a small contact area with the seal wall 68 is brought into contact with the seal member 60 in advance, so that the seal member 60 is sealed with the seal surface. It is possible to reduce the collision sound when contacting with 66.

  The vehicle air conditioner according to the present invention is, of course, not limited to the above embodiment, and various configurations can be adopted without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Air-conditioner for vehicles 14 Air-conditioning case 20 Damper mechanism 22 Vent vent 44, 80 Vent adjustment damper 50, 54, 58 Feather 60 Seal member 62 82 Protruding lip 66 Sealing surface 68 Seal wall

Claims (1)

In a vehicle air conditioner having a casing having a passage through which air flows and a damper for opening and closing the opening of the casing,
The damper includes a shielding plate for closing the opening;
A rotating shaft provided on the shielding plate and rotatably supporting the shielding plate with respect to the casing;
A seal member made of a rubber material that is provided at the tip of the shielding plate that is perpendicular to the extending direction of the rotating shaft, and that comes into contact with the seal surface of the casing formed at the periphery of the opening;
It is provided at the tip of the seal member, and when the opening is closed, the seal member abuts on the casing before coming into contact with the seal surface, and the contact area between the seal member and the seal surface A projection which abuts against the casing with a small contact area;
A vehicle air conditioner characterized by comprising:

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