JP2005029097A - Sound proofing structure for air-conditioning door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To relatively reduce striking noise of a seal part and a seat surface part and dispense with a lining on the seat surface part even when a hard material such as an elastomer is used for the seal part of an air-conditioning door. <P>SOLUTION: A time lag is made between the time when a protrusion 17 of a seal part 13 is abutted with a seat surface part 20 and the time when a protrusion 15 of a seal part 12 is abutted with a seat surface part 19, and thereby the seal part 12 and the seal part 13 are prevented from being abutted to the seat surface parts 19 and 20 at the same time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention reduces, for example, the sound of hitting a wall surface for closing an air flow path for an air conditioning door for opening and closing an air flow path of an air conditioning unit used in a vehicle air conditioner or the like. The present invention relates to a soundproof structure for a suitable door.

In recent years, it has already been publicly known that an elastic seal portion that comes into contact with a seat surface portion disposed on an air flow path is provided at a tip portion of an air conditioning door, and an elastomer (polymer elastic rubber material) is used as a material of the seal portion. (See Patent Document 1).
JP 2001-301442 A

  The problem to be solved by the present invention is that, in the configuration of Patent Document 1, the elastomer is relatively hard in the elastic rubber material, and the sheet surface portion is also formed of resin. A relatively loud sound is generated when the seal portion of the air conditioning door comes into contact with the seat surface portion for closing.

  Further, in order to prevent this abnormal noise from occurring, it is necessary to add a lining as a cushioning material on the seat surface side, which increases man-hours and increases the manufacturing cost of the entire air conditioning unit. Is a problem to be solved.

  For this reason, even if a hard material is used for the seal part of the air-conditioning door, the present invention eliminates the need to place a lining on the seat surface part by relatively reducing the hitting sound between the seal part and the seat surface part. It is intended to be.

  The soundproofing structure of the air conditioning door according to the present invention is an air conditioning door that adjusts the opening degree of the plurality of openings independently by being disposed in the air flow path, and includes a door body and a plurality of seat surface portions. A first seal portion that contacts one sheet surface portion, and a second seal portion that contacts another sheet surface portion when the first seal portion contacts one sheet surface portion. The first seal member and the second seal member are most characterized in that the first contact member and the second seal member have a structure that causes a deviation in the timing of contact with the sheet surface portion (claim 1). An example of the material for the seal portion is an elastomer.

  The soundproof structure of the air conditioning door according to the present invention includes a seal part that abuts on one sheet surface part and a seal part that abuts on another sheet surface part as a specific configuration that causes a shift in timing as described above. Thus, the length from the base to the tip is made relatively different (claim 2). Further, the extending direction from the base portion to the tip end of one of the seal portions is shifted along the rotation orbit of the seal portion between the seal portion that contacts one sheet surface portion and the seal portion that contacts another sheet surface portion. (Claim 3).

  Further, of the seal part that abuts against one sheet surface part and the seal part that abuts against another sheet surface part, the thickness of the seal part that abuts against the sheet surface part first is the thickness of the seal part that abuts against the sheet surface part later. It is made thinner than the wall thickness (claim 4).

  Furthermore, the seal part that abuts against one sheet surface part and the seal part that abuts against another sheet surface part each have a pair of protrusions, and one of the protrusions of the seal part is one sheet surface part. When the other protrusion of the seal portion comes into contact with another sheet surface portion, the first or second seal portion is closed on the side where the load due to air pressure is small, that is, the seal portion is pushed depending on the air pressure. You may make it make the thickness of the protrusion part of the direction side thinner than another protrusion part (Claim 5).

  As described above, according to the present invention, there is a slight difference between the time when one seal portion abuts on the sheet surface portion and the time when the other seal portion abuts on the sheet surface portion. Therefore, it is not necessary to provide a lining on the seat surface portion.

  In particular, according to the invention described in claim 4, since the thickness of the seal portion that comes into contact with the sheet surface portion first is relatively thin, the seal portion that is in contact with the sheet surface portion is bent by further pressing. The other seal portion can also come into contact with the seat surface portion. In addition, since the seal portion in contact with the seat surface portion is bent, the other seal portion serves as a cushion when contacting the seat surface portion. For this reason, the hitting sound when the seal portion comes into contact with the seat surface portion can be further reduced.

  In particular, according to the invention described in claim 5, the seal portion for reducing the wall thickness is disposed on the side that is difficult to be pressed by the outside air inlet or the air flowing in from the inside air inlet when contacting the seat surface portion. Therefore, the possibility that the seal portion is damaged or deformed by the wind pressure can be reduced.

  In FIG. 1, the intake part 1 which comprises some air conditioning units of a vehicle is shown. In the intake portion 1, an outside air introduction port 3 for introducing outside air in the passenger compartment is opened at the uppermost part of the intake case 2, and the intake portion 1 is positioned below the outside air introduction port 3 and the opening direction of the outside air introduction port 3 is Inside air introduction ports 4 are opened in different directions. A switching door 5 that selectively switches between the outside air introduction port 3 and the inside air introduction port 4 is disposed in the air guide path 7 of the intake case 2.

  As shown in FIG. 2, the switching door 5 is basically composed of a shielding portion 10 and a rotating shaft 11, and the outside air introduction port 3 from a position where the inside air introduction port 4 is closed by a door actuator (not shown). It can be moved to any position within the range up to the position where it is closed.

  Among these, the shielding part 10 has a curved surface part 10a having an arc-shaped cross section, and the curved surface part 10a has a shape that can completely block either the outside air introduction port 3 or the inside air introduction port 4 and It is formed in size. Sealing portions 12 and 13 extend along the radial direction of the shielding portion 10 at both peripheral edges of the shielding portion 10.

  The seal portions 12 and 13 are formed of a relatively hard high-molecular elastic rubber material such as an elastomer, for example, and as shown in FIGS. The protrusions 14, 15 or 16, 17 are bifurcated at the tip.

  Thereby, when the inside air circulation (REC) mode is selected, the seat surface portion 18 (shown in FIG. 1) in which the protrusion portion 14 of the seal portion 12 is formed in the intake case 2 and protrudes into the air guide path 7. And the projection 16 of the seal portion 13 is in contact with the lower surface of the seat surface portion 19 formed in the intake case 2 and protruding into the air guide path 7, and the outside air is introduced by the shielding portion 10 and the seal portions 12 and 13. The mouth 3 is closed.

  When the outside air introduction (FRESH) mode is selected, the protrusion 15 of the seal portion 12 abuts on the upper surface of the seat surface portion 19 and the protrusion 17 of the seal portion 13 is formed on the intake case 2 and guided. The inside air inlet 4 is closed by the shielding portion 10 and the seal portions 12 and 13 in contact with the sheet surface portion 20 protruding into the air passage 7.

  According to the above configuration, in the air conditioning unit having the intake portion 1, when a blower (not shown) rotates, the air selected from the outside air introduction port 3 and the inside air introduction port 4 is sent into the air guide path 7. After being led downstream from the intake portion 1 through the communication hole 8 and cooled by an evaporator to become cold air, a part or all of the cold air is heated by the heater core to become hot air, The mixture is mixed, temperature-controlled at an appropriate temperature, and blown into the vehicle interior from an appropriately selected outlet.

  2, the seal portion 12 and the seal portion 13 are, as shown in FIG. 3, the dimension L1 of the projection portion 14 of the seal portion 12 larger than the dimension L2 of the projection portion 16 of the seal portion 13, and The dimension L4 of the protrusion 17 of the seal part 13 is larger than the dimension L3 of the protrusion 15 of the seal part 12.

  Further, as shown in FIG. 3, the seal portion 12 and the seal portion 13 are formed such that the thickness T1 of the projection portion 14 of the seal portion 12 is smaller than the thickness T3 of the projection portion 16 of the seal portion 13 and the seal portion 13. The thickness T4 of the protrusion 17 is smaller than the thickness T2 of the protrusion 15 of the seal portion 12. When the thicknesses T2 and T3 of the protrusions 15 and 16 are 1.5 mm, for example, the thicknesses T1 and T4 of the protrusions 14 and 17 are 1.2 mm, for example.

  For this reason, as shown in FIG. 2, for example, when the FRESH mode is selected, the protrusion 15 of the seal portion 12 is formed at the stage where the top of the protrusion 17 of the seal portion 13 is just in contact with the sheet surface portion 20. It is not in contact with the upper surface of the surface portion 19 yet, and there is a gap having a dimension S (for example, 0.3 mm) therebetween. Then, the protrusion 15 of the seal portion 12 abuts against the upper side surface of the sheet surface portion 19 by bending from the state in which the top portion of the protrusion portion 17 of the seal portion 13 is in contact with the sheet surface portion 20 to the sheet surface portion 20 side. .

  On the other hand, when the REC mode is selected, although not shown, when the top of the protrusion 14 of the seal portion 12 is just in contact with the sheet surface portion 18, the protrusion 16 of the seal portion 13 is below the sheet surface portion 19. It is not yet in contact with the side surface, and there is a gap having a dimension S (for example, 0.3 mm) therebetween. Then, the protrusion 16 of the seal portion 13 comes into contact with the upper side surface of the sheet surface portion 19 by bending from the state in which the top portion of the protrusion portion 14 of the seal portion 12 is in contact with the sheet surface portion 18 to the sheet surface portion 18 side. .

  However, the protruding portion 14 of the seal portion 12 and the protruding portion 16 of the seal portion 13 or the protruding portion 15 of the seal portion 12 and the protruding portion 17 of the seal portion 13 are simultaneously formed on the sheet surface portions 18 and 19 or the sheet surface portions 19 and 20. Since it does not abut and shifts in time, the hitting sound when the time difference seal portions 12 and 13 abut against the sheet surface portions 18, 19 and 20 is reduced. In addition, since the protruding portion 14 of the seal portion 12 and the protruding portion 17 of the seal portion 13 are bent and abut against the protruding portion 16 of the seal portion 13 and the protruding portion 15 of the seal portion 12, the protruding portions 14 and 17 act as cushions and strike sound. Is further reduced.

  However, there is a slight time difference between the time when the protrusions 14 and 15 of the seal portion 13 abut on the sheet surface portion 19 or 20 and the time when the protrusions 16 and 17 of the seal portion 12 abut on the sheet surface portion 18 or 19. As shown in FIG. 3, the protrusion 15 and the protrusion 17 and the protrusion 14 and the protrusion 16 are not limited to a configuration in which the dimensions from the base to the tip are different.

  That is, as shown in FIG. 4, while the dimensions of the protrusion 15 and the dimensions of the protrusion 17 are the same, the position of the top of the protrusion 17 is the same as the rotation of the door 5 starting from the simultaneously contacting portion. Is shifted from the sheet surface portion 20 side (in the direction of the arrow in FIG. 4A) by, for example, about 0.2 mm to 1 mm. Accordingly, the protrusion 17 can come into contact with the sheet surface 20 before the protrusion 15 comes into contact with the sheet surface 19.

  Further, as shown in FIG. 4, while the dimensions of the projections 14 and the dimensions of the projections 16 are the same, the position of the top of the projections 14 is the same as that of the rotation of the door 5 starting from the portion that contacts at the same time. For example, the sheet surface 18 is shifted to the sheet surface 18 side (in the direction of the arrow in FIG. 4B) by, for example, about 0.2 mm to 1 mm. As a result, the protrusion 14 can come into contact with the sheet surface 18 before the protrusion 16 contacts the sheet surface 19.

  When the thicknesses T2 and T3 of the protrusions 15 and 16 are 1.5 mm, for example, the thicknesses of the protrusions 14 and 17 are set so that the thicknesses T1 and T4 of the protrusions 14 and 17 are 1.2 mm, for example. The point that is thinner is the same.

  However, even in this embodiment, the same operations and effects as those of the previous embodiment shown in FIG. 3 can be obtained. The positions of the protrusions 15 and 16 may be shifted so as to contact the sheet surface portion 20 later than the protrusions 14 and 17 without changing the positions of the protrusions 14 and 17. Moreover, you may combine the structure of the seal part shown in FIG. 3, and the structure of the seal part shown in FIG.

  And as FIG. 5 shows, contrary to previous embodiment, the thickness of the projection part 14 of the seal part 12 is 1.5 mm, and the thickness of the projection part 16 of the seal part 13 is 1.2 mm, for example. The protrusion 16 is thinner than the protrusion 14, the thickness of the protrusion 17 of the seal 13 is 1.5 mm, and the thickness of the protrusion 15 of the seal 12 is 1.2 mm. It may be thinner than the protrusion 17. In this case, each of the projections 14, 15, 16, and 17 has a configuration opposite to the configuration of FIGS. 3 and 4, that is, the projection 15 and the projection 16 as shown in FIG. After contacting the sheet surface portion 19, the raising portions 14 and 17 are configured to be able to contact the sheet surface portion 18 or 20.

  In the embodiment shown in FIG. 5 as well, operations and effects similar to those of the previous embodiments can be obtained. In particular, according to this embodiment, relative to the seat surface portions 18 and 20 by the wind pressure. Since the protrusions 14 and 17 that are strongly pressed against each other and are loaded can be made relatively thick, the strength is improved compared to the case where the protrusions 14 and 17 are relatively thin, and the protrusions 14 and 17 17 is difficult to break and deform.

FIG. 1 is a side cross-sectional view in an FRESH mode state of an intake portion in which an air conditioning door according to the present invention is used. FIG. 2 is an enlarged cross-sectional view of a main part of the air conditioning door same as above. FIG. 3 is an enlarged cross-sectional view of a main part of a seal portion provided on the air conditioning door. FIG. 4 is an enlarged cross-sectional view of a main part of the seal portion showing another embodiment regarding a configuration for shifting the timing of one seal portion and another seal portion. FIG. 5: is the principal part expanded sectional view which showed other embodiment regarding the thickness of the projection part of the seal part of an air-conditioning door to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intake part 2 Intake case 3 Outside air introduction port 4 Inside air introduction port 5 Switching door (air-conditioning door)
DESCRIPTION OF SYMBOLS 7 Air guide path 8 Communication hole 10 Shield part 11 Rotating shaft 12 Seal part 13 Seal part 14 Projection part 15 Projection part 16 Projection part 17 Projection part 18 Sheet surface part 19 Sheet surface part 20 Sheet surface part

Claims (5)

An air-conditioning door that is disposed in an air flow path and displaces by itself to adjust the opening of a plurality of openings, and is a first main body that abuts against the door body and one of the plurality of seat surfaces. A seal portion and a second seal portion that comes into contact with the other sheet surface portion when the first seal portion comes into contact with one sheet surface portion, and is configured to include the first seal member and the second seal member. The soundproof structure for an air conditioning door is characterized in that the seal member is configured to cause a deviation in timing of contact with the seat surface portion. The soundproof structure for an air conditioning door according to claim 1, wherein a length from the base to the tip is relatively different between a seal portion that abuts against one seat surface portion and a seal portion that abuts against another sheet surface portion. . The extending direction from the base to the tip of one of the seal portions is shifted along the rotation path of the seal portion between the seal portion that contacts one sheet surface portion and the seal portion that contacts another sheet surface portion. The soundproof structure for an air conditioning door according to claim 1. Of the seal part that contacts one sheet surface part and the seal part that contacts another sheet surface part, the thickness of the seal part that contacts the sheet surface part first is the thickness of the seal part that contacts the sheet surface part later The soundproof structure for an air conditioning door according to claim 1, wherein the soundproofing structure is thinner. The seal part that abuts against one sheet surface part and the seal part that abuts against another sheet surface part are each configured to have a pair of protrusions, one of the protrusions of the seal part being in contact with one sheet surface part, When the other of the protrusions of the seal part abuts on another sheet surface part, the first or second seal part has a thickness of the protrusion part on the side where the load due to air pressure is smaller than that of the other protrusion parts. The soundproof structure for an air conditioning door according to claim 1, 2, or 3, wherein the soundproofing structure is thin.

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