JP2009248823A - Air passage opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air passage opening/closing device stabilizing air volume circulating in an opening portion even if the rotation stop position of an opening/closing door varies during a minute opening with the opening of the opening portion throttled by the opening/closing door. <P>SOLUTION: The end 31 of a packing 30 is provided at the side 23 on the rotation end-side of the door plate portion 22 of a defroster door 20 as the opening/closing door, and a notched portion 31A is formed in the end 31. When the defroster door 20 opens the defroster opening 11 with the minute opening, the end 31 of the packing 30 is brought into contact with an air conditioner case 10, and air passing through the notched portion 31A is led to flow into the defroster opening 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an air passage opening and closing device that opens and closes an air passage through which air flows.

As a prior art, there is an air passage opening and closing device disclosed in Patent Document 1 below. In this air passage opening and closing device, the opening portion of the duct is opened and closed by a flat door plate portion that rotates about the rotation axis. When the opening portion is closed, the opening portion is adhered to the door plate portion. The foam material is pressed against a plate-like rib protruding on the inner wall of the duct. When the opening / closing door is at a very small opening degree to reduce the opening degree, a gap is formed between the duct and the opening / closing door so that the foam material is slightly separated from the plate-like rib, and a small amount of air passing through the gap is formed. Air flows through the opening.
JP 2000-229513 A

  However, in the above-described prior art air passage opening and closing device, when the opening and closing door is a small opening that restricts the opening of the opening, if there is variation in the rotation stop position of the opening and closing door, the gap dimension changes, and the opening There is a problem that the air volume that circulates is difficult to stabilize.

  The present invention has been made in view of the above points, and even when the opening / closing door has a small opening that restricts the opening of the opening, even if the rotation stop position of the opening / closing door varies, the amount of air flowing through the opening An object of the present invention is to provide an air passage opening and closing device capable of stabilizing the air.

In order to achieve the above object, in the invention described in claim 1,
A case (10) having an opening (11) through which air flows and forming an air passage therein;
It has a rotating shaft (21) and a door plate portion (22) extending radially outward from the rotating shaft (21), and the door plate portion (22) rotates around the rotating shaft (21) to open. An air passage opening and closing device comprising: an opening and closing door (20) for opening and closing the portion (11),
A tip seal member (31) is provided on the side (23) on the rotation tip side of the door plate portion (22), and a notch (31A) is formed in the tip seal member (31).
When the opening / closing door (20) forms an opening throttle state in which the opening (11) is narrowed more than the fully opened state, the tip seal member (31) contacts the case (10) and the notch (31A) ) Passes through the opening (11).

  According to this, when the opening / closing door (20) forms the opening degree throttle state, the air volume passing through the notch (31A) of the tip seal member (31) is circulated through the opening (11) of the case (10). The air volume to be used can be set. Therefore, even if the rotation stop position varies when the open / close door (20) forms the opening throttle state, the air volume flowing through the opening (11) can be stabilized.

  In the invention according to claim 2, the extended surface sealing member (which is pressed against the case (10) when the opening (11) is closed) is provided on the extended surface (24) of the door plate portion (22). 32), and the tip seal member (31) and the extended surface seal member (32) are formed integrally.

  According to this, the extended surface seal member (32) used for the seal in the fully closed state that closes the opening (11) and the tip seal member (31) used for the partial seal in the opening throttle state are integrated. The configuration of the seal member (30) of the open / close door (20) can be simplified.

  In the invention according to claim 3, the tip seal member (31) extends from the extending surface seal member (32) and covers the side (23) on the pivot tip side of the door plate portion (22). The cross section perpendicular to the rotation axis (21) is U-shaped.

  According to this, only by forming the sealing member (30) having the same thickness continuously from the extending surface (24) of the door plate portion (22) so as to cover the side (23) on the rotating tip side, The seal member (31) and the extended surface seal member (32) can be easily formed. Moreover, the sliding resistance with the case (10) at the time of an aperture-throttle state can be reduced by using the outer peripheral surface of the tip seal member (31) as a curved surface.

  In the invention according to claim 4, the case (10) has a surface (15) with which the tip seal member comes into contact when the open / close door (20) forms the aperture throttle state. It is characterized by being formed along a turning locus.

  According to this, the sliding resistance between the tip seal member (31) and the case (10) in the opening throttle state is unlikely to change regardless of the position of the open / close door (20).

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  Embodiments to which the present invention is applied will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a schematic configuration in the vicinity of a defroster opening 11 which is a main part of an air conditioning unit 1 of a vehicle air conditioner employing an air passage opening and closing device according to an embodiment to which the present invention is applied. FIG. 2 is a cross-sectional view of the defroster door 20 when the opening degree of the defroster opening 11 is reduced (so-called minute opening), and FIG. 3 is a line AA in FIG. It is sectional drawing.

  The air conditioning unit 1 of the vehicle air conditioner of the present embodiment, a part of which is shown in FIG. 1, is installed below the instrument panel in the front part of the vehicle interior, and air blown from a blower unit (not shown) is sent to the air conditioning unit 1 air conditioning case 10. The temperature is adjusted by an evaporator (cooling heat exchanger, cooling heat exchanger) and a heater core (heating heat exchanger, heating heat exchanger) (not shown) disposed in the air conditioning case 10 to perform both heat exchanges. It is made to flow out from the opening part provided in the air flow downstream rather than the vessel.

  In the air-conditioning case 10, in addition to the defroster opening 11 connected to the defroster outlet for blowing wind toward the inner surface of the vehicle front window glass shown in FIG. A face opening connected to a face outlet that blows out air, a foot opening that connects to a foot outlet that blows wind toward the passenger's feet in the passenger compartment, etc. are open, and the air conditioning is temperature controlled by the air outlet mode door Wind is distributed according to the blowing mode.

  The air-conditioning case 10 shown in FIG. 1 is made of a resin molded product having some elasticity and excellent strength, such as polypropylene resin, and is made up of a plurality of divided case bodies. The divided case body accommodates the above-described heat exchangers and various doors and the like, and is then integrally coupled by a fastening means such as a metal spring clip or a screw to form an air conditioning case 10.

  The defroster opening 11 shown in FIG. 1 is opened and closed by a defroster door 20 that is one of the blowing mode doors. The air conditioning case 10 corresponds to the case in the present embodiment, the defroster opening 11 corresponds to the opening, and the defroster door 20 corresponds to the open / close door.

  In FIG. 1, the position where the defroster door 20 fully opens the defroster opening 11 is indicated by a solid line, and the position where the defroster door 20 fully closes the defroster opening 11 is indicated by a two-dot chain line.

  The defroster door 20 includes a rotation shaft 21 and a door plate portion 22 that extends from the rotation shaft 21 in the radially outward direction of the rotation shaft 21. In this example, the door plate portion 22 is made of resin (for example, made of polypropylene resin) integrally molded with the rotary shaft 22.

  On the surface of the door plate portion 22, a packing 30 is provided as a sealing member made of foamed resin (for example, foamed urethane resin) that is bonded or integrally molded. The packing 30 extends in the extending direction of the front end portion 31 provided on the front end side portion 23 that is the side of the door plate portion 22 on the rotating front end side of the surface of the door plate portion 22 and the door plate portion 22 extends. It consists of a flat part 32 provided on the surface 24, and the tip part 31 and the flat part 32 are formed integrally.

  Specifically, the front end portion 31 extends from the flat portion 32 with the same thickness and covers the front end side portion 23 of the door plate portion 22, and a cross section orthogonal to the rotation shaft 21 is U-shaped.

  Here, the front end portion 31 of the packing 30 corresponds to a front end seal member, and the flat portion 32 of the packing 30 corresponds to an extended surface seal member. The packing 30 is a seal member in which a tip seal member and an extended surface seal member are integrally formed.

  As shown in FIG. 3, a cutout portion 31 </ b> A is formed at the distal end portion 31 of the packing 30 by cutting out a part in the direction in which the rotation shaft 21 of the defroster door 20 extends. As apparent from FIG. 3, in this example, the shape of the cutout portion 31 </ b> A is a rectangular shape, and a part of the distal end portion 31 in the direction of the rotation shaft 21 (a central portion in the direction of the rotation shaft 21) is a door plate portion. 22 is cut out to the position of the tip side 23.

  In the air conditioning case 10, an opening edge ridge portion 12 is formed on the peripheral portion of the defroster opening portion 11 so as to protrude in a circumferential shape toward the inside of the air conditioning case 10, and the tip is a sealing surface 13.

  When the door plate portion 22 of the defroster door 20 closes the defroster opening portion 11, the flat portion 32 of the packing 30 is pressed by the opening edge ridge portion 12 of the air conditioning case 10 and the door plate portion 22 and the air conditioning case 10. It is designed to seal between.

  On the rotating front end side of the defroster door 20, the air conditioning case 10 includes a wall portion 14 that extends downward from the edge of the defroster opening 11. As shown in FIG. 2, the wall portion 14 is a portion with which the distal end portion 31 of the packing 30 comes into contact when the defroster door 20 forms an opening degree throttle state. That is, the wall portion 14 is provided to form the seal surface 15 in contact with the front end portion 31 of the packing 30 when the defroster door 20 is in the opening throttle state in which the opening degree of the defroster opening 11 is narrower than the fully opened state. ing.

  The sealing surface 15 formed on the wall portion 14 may be planar (the longitudinal section is linear), but the defroster door 20 is rotated with the packing 30 tip 31 in contact with the sealing surface 15. In this case, the sealing surface 15 is formed in a curved surface (vertical cross section is arc-shaped) so as to follow the rotation trajectory of the tip 31 so that the sliding resistance can be stabilized low regardless of the rotation position. It is preferable.

  According to the above-described configuration, the distal end portion 31 of the packing 30 is provided on the distal end side portion 23 of the door plate portion 22, and the notched portion 31 </ b> A is formed in the distal end portion 31 so that the defroster door 20 fully opens the defroster opening portion 11. When the opening degree throttle state (small opening degree) in which the opening degree is narrower than the state is formed, the tip portion 31 contacts the wall portion 14 of the air conditioning case 10, and the air passing through the notch portion 31 </ b> A is passed through the defroster opening portion 11. Can be distributed.

  For example, in the air conditioning unit 1, a so-called foot blowing mode is formed in which most of the conditioned air is blown from a foot opening (not shown) and the remaining conditioned air is leaked from the defroster opening 11, and the defroster door 20 passes through the defroster opening 11. When the minute opening state is set, the amount of air passing through the notch 31 </ b> A can be set as the amount of air flowing through the defroster opening 11.

  Therefore, even when the defroster door 20 is in a minute opening state, even if there is a variation in the rotation stop position of the defroster door 20, the amount of air flowing through the defroster opening 11 can be stabilized.

  As shown in FIG. 2, the rotation stop position in the minute opening state of the defroster door 20 is between the state closest to the fully open state indicated by the solid line and the state immediately before the fully closed state indicated by the two-dot chain line. Even if there is a variation, the notch 31A always becomes a choke point (a point where the ventilation path is most restricted), and a stable minute air volume can be obtained.

  Further, when the defroster door 20 brings the defroster opening 11 into a small opening state, the tip 30 of the packing 30 can always be brought into contact with the sealing surface 15 of the air conditioning case 10, so that the self-excited vibration of the defroster door 20 is caused. It is also possible to suppress it.

  For example, as shown in FIG. 4, the packing 930 is not provided with the tip 31 as in this embodiment, and a small air volume is obtained by a gap formed between the packing 930 of the defroster door 920 and the air conditioning case 10. In this case, it is difficult to stabilize the air volume if there is a variation in the door rotation stop position.

  As shown in FIG. 4, the door plate portion 22 of the door 920 and the air conditioning case 10 are both rigid bodies, and a certain amount of clearance is required on the door front end side in order to prevent interference between the two. Therefore, although the air flow rate can be reduced to a certain fixed amount, the air flow rate varies depending on the opening degree variation of the door 920 as shown in FIG. 4 and FIG. 5 showing a state where the opening degree is larger than the state of FIG. There is a problem that the choke point may not be constant. In addition, when the opening is extremely small, there is a problem that self-excited vibration may occur due to ventilation through a minute gap.

  Moreover, in the said embodiment, the front-end | tip part 31 and the plane part 32 of the packing 30 are shape | molded integrally, and the structure of the packing 30 can be simplified rather than the case where it forms as a different body.

  Further, the packing 30 has a configuration in which the tip portion 31 and the flat portion 32 are continuous, and the tip portion 31 is U-turned so as to cover the tip side portion 23 of the door plate portion 22. Therefore, the packing 30 composed of the front end portion 31 and the flat surface portion 32 can be easily formed only by continuously forming the packing 30 having the same thickness from the extending surface 24 of the door plate portion 22 so as to cover the front end side portion 23. Can be formed. Moreover, since the outer peripheral surface of the front-end | tip part 31 becomes a smooth curved surface, sliding resistance with the air-conditioning case 10 at the time of the defroster door 20 rotating in an opening degree throttle state (micro opening degree state) can be reduced. Furthermore, it is possible to reliably suppress the self-excited vibration at the minute opening.

(Other embodiments)
In the above-described embodiment, the cutout portion 31A is provided at one place in the central portion of the packing 30 tip 31 in the extending direction of the rotary shaft 21, but may be provided at a plurality of places. Moreover, when providing in several places, it is easy to equalize the air distribution to the blower outlet into a vehicle interior by arrange | positioning a some notch part equally to an axial direction.

  In the above embodiment, the notch 31A is rectangular, but the shape is not limited to this.

  Moreover, in the said one Embodiment, although the packing 30 which consists of foams was used as the sealing member, a sealing member is not limited to this, For example, you may consist of a thermoplastic elastomer.

  In the above embodiment, the sealing member has the tip portion 31 and the flat portion 32 integrated. However, the sealing member may be a separate member, and the sectional shape of the tip portion 31 may not be U-shaped. .

  Moreover, in the said one Embodiment, although the defroster door 20 was a cantilever door in which the one door board part 22 extended linearly in the radial direction of the rotating shaft 21, it is a door by which the door board part bent in the middle. It may also be a so-called butterfly door in which a plurality of door plate portions extend in the radially outward direction of the rotating shaft.

  In the above embodiment, the case where the opening / closing door is the defroster door 20 has been described. However, the present invention can also be applied to other mode doors and other doors such as an air mix door.

  In the above embodiment, the air passage opening / closing device that distributes air in the vehicle air conditioning unit 1 has been described. However, the present invention is not limited to those that perform air distribution in a stationary air conditioning unit, or other than air conditioning units. The present invention is also effective when applied to an air passage opening and closing device that opens and closes the air passage.

It is a longitudinal section showing a schematic structure of an important section of air-conditioning unit 1 of a vehicle air-conditioning device which adopted an air passage opening and closing device in one embodiment to which the present invention is applied. FIG. 3 is a cross-sectional view of the defroster door 20 when the opening of the defroster opening 11 is reduced. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the ventilation state in a comparative example. It is sectional drawing which shows the ventilation state in a comparative example.

Explanation of symbols

10 Air conditioning case (case)
11 Defroster opening (opening)
15 Sealing surface (surface where the tip seal member contacts)
20 Defroster door
21 Rotating shaft 22 Door plate part 23 Tip side part (side on the rotating tip side)
24 Extension surface 30 Packing (seal member)
31 Tip (tip seal member)
31A Notch 32 Flat part (Extended surface seal member)

Claims (4)

A case (10) having an opening (11) through which air flows and forming an air passage therein;
A rotating shaft (21) and a door plate portion (22) extending radially outward from the rotating shaft (21), wherein the door plate portion (22) rotates about the rotating shaft (21); An open / close door (20) for opening and closing the opening (11),
A tip seal member (31) is provided on the side (23) on the rotation tip side of the door plate portion (22), and a notch (31A) is formed in the tip seal member (31).
When the opening / closing door (20) forms an opening throttle state in which the opening (11) is opened more narrowly than a fully opened state, the tip seal member (31) is in contact with the case (10), and The air passage opening and closing device characterized in that air passing through the notch (31A) flows through the opening (11). The extended surface (24) of the door plate portion (22) is provided with an extended surface seal member (32) that is pressed against the case (10) when the opening (11) is closed.
The air passage opening and closing device according to claim 1, wherein the tip seal member (31) and the extending surface seal member (32) are integrally formed.   The tip seal member (31) extends from the extending surface seal member (32) and covers a side (23) on the pivot tip side of the door plate portion (22), and is attached to the rotating shaft (21). The air passage opening and closing device according to claim 2, wherein the orthogonal cross section has a U shape.   In the case (10), the surface (15) with which the tip seal member contacts when the opening / closing door (20) forms the throttled opening state follows the rotation locus of the tip seal member (31). The air passage opening and closing device according to any one of claims 1 to 3, wherein the air passage opening and closing device is formed.

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