JP3832072B2 - Air passage opening / closing door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air passage opening / closing door that opens and closes first and second openings from which air is blown, and is effective for use in a vehicle air conditioner.
[0002]
[Prior art]
As a mechanism for opening and closing the first and second openings with one air passage opening / closing door, the applicant has already filed Japanese Patent Application No. 8-344867. As shown in FIG. 6, the present invention includes a first door main body 141 that opens and closes a first opening 131, a second door main body 142 that opens and closes a second opening 132, and 131, 132 between both openings. And a single shaft 143 to which both door main body parts 141 and 142 are connected.
[0003]
[Problems to be solved by the invention]
By the way, the inventors examined the above-mentioned invention as a prototype. For example, when the first opening 131) is closed and the second opening 132 is open, the air flowing through the second opening 132 is used. It has been discovered that a problem arises that a part of the air leaks to the first opening 131 side via the gap 112.
[0004]
In order to solve this problem, a means of closing the gap 112 by covering the entire shaft 143 with the packing 145 as shown in FIG. 7 can be considered. However, in this means, the packing 145 and the casing 110 are separated. Since the contact is always made, noise (abnormal noise) due to sliding (friction) between the packing 145 and the casing 110 is generated when the shaft 143 rotates, and a new problem that wear of the packing 145 occurs. End up.
[0005]
An object of this invention is to prevent that air leaks from the clearance gap between a shaft and a casing in view of the said point.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses the following technical means.
In the first to third aspects of the present invention, the packing (144) that opens and closes the gap (112) between the shaft (143) and the casing (111) has the first opening (131) closed, and When the two openings (132) are open, the gap (112) is closed by contacting the casing (111).
[0007]
Thereby, it can prevent that a part of air which distribute | circulates the 2nd opening part (132) leaks to the 1st opening part (131) side via a clearance gap (122).
In the present invention, the packing (144) contacts the casing (111) when the first opening (131) is closed and the second opening (132) is opened to close the gap (122). Therefore, in other cases, the packing (144) and the casing (111) are not in contact with each other. Therefore, when the shaft (143) rotates, generation of noise (abnormal noise) due to sliding (friction) between the packing (144) and the casing (111) and wear of the packing (144) can be prevented.
[0008]
As described above, in the air passage opening / closing door according to the present invention, the gap (122) between the shaft (143) and the casing (111) is prevented while preventing the generation of noise (abnormal noise) and the wear of the packing (144). ) Can be prevented from leaking air.
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view of a vehicle air conditioner 100 that employs an air passage opening / closing door according to the present embodiment, and 110 forms a passage for air that blows out into the passenger compartment, and houses an evaporator 121 and a heater core 122 described later. A resin air conditioning casing (hereinafter abbreviated as a casing).
[0010]
Further, an evaporator (air cooling means) 121 for cooling the air by utilizing the evaporation of the refrigerant is disposed on the upstream side of the air flow of the casing 110. The evaporator 121 includes a blower (not shown). ) Passes through all the air blown. A heater core (air heating means) 122 that heats air by using cooling water of a vehicle traveling engine (not shown) as a heat source is disposed on the downstream side of the air flow of the evaporator 121. A bypass passage 123 that circumvents the path is formed.
[0011]
Reference numeral 124 denotes a first air mix door that controls the amount of air passing through the bypass passage 123, and reference numeral 125 denotes a second air mix door that controls the amount of air passing through the heater core 122. The air mix doors 124 and 125 are opened. The temperature of the air blown into the passenger compartment is adjusted by adjusting the degree (the amount of passing air).
Further, on the most downstream side of the casing 110, a center face opening (first opening) communicating with a center face outlet 301 (see FIG. 2) through which air blows out toward the upper body of the occupant at approximately the center of the passenger compartment. 131 and a side face opening (second opening) 132 communicating with a side face outlet 302 (see FIG. 2) through which air blows out toward the upper body of the occupant at the vehicle interior side portion. The openings 131 and 132 are opened and closed by a face opening and closing door 140 using the air passage opening and closing door according to the present invention. The structure of the face opening / closing door 140 will be described later.
[0012]
Incidentally, as shown in FIG. 3, both the face opening portions 131 and 132 are formed side by side in the vertical direction, and two side face opening portions 132 are formed side by side in the vehicle left-right direction.
In FIG. 1, reference numeral 133 denotes a defroster opening that communicates with a defroster outlet 303 (see FIG. 2) that blows air toward the windshield of the vehicle, and 134 denotes a front foot that blows air toward the feet of the front seat. A front foot opening that communicates with an air outlet (not shown) and 135 is a rear foot opening that communicates with a rear foot air outlet (not shown) that blows air toward the feet of the rear seat.
[0013]
The openings 133 to 135 are opened and closed by opening and closing doors 151 and 152. The opening and closing door 151115 and the face opening and closing door 140 are driven by a driving means (not shown) such as a servo motor.
Next, the face opening / closing door 140 will be described with reference to FIG.
141 is a first door main body that opens and closes the center face opening 131, and 142 is a second door main body that opens and closes the side face opening 132. The door main body portions 141 and 142 are connected to a single shaft 143. As the shaft 143 rotates, the door main body portions 141 and 142 swing, so that the face opening portions 131 and 142 A so-called butterfly-type opening / closing door that opens and closes 132 is configured.
[0014]
Further, the shaft 143 has a predetermined gap 112 with the frame portion 111 (casing 110) at a portion corresponding to the frame portion 111 (casing 110) that partitions between the face opening portions 131 and 132 in the casing 110. The shaft 143 is rotationally driven by the servo motor described above.
[0015]
The shaft 143 is provided with a ridge-shaped shaft packing 144 that protrudes in the radial direction of the shaft 143 toward the frame portion 111 and extends in the longitudinal direction of the shaft 143.
The door packing 145 joined to the end of the shaft packing 144 and the door main body portions 141 and 142 is joined to the 141 to 143 at the same time as the both door main body portions 141 and 142 and the shaft 143 are molded. It is made of a porous elastic member.
[0016]
Next, the operation and characteristics of the face opening / closing door 140 will be described.
In this embodiment, when the shaft 143 rotates counterclockwise in FIG. 4, the center face opening 131 is configured to be closed before the side face opening 132.
For this reason, when the shaft 143 rotates counterclockwise from the state in which both the face openings 131 and 132 are open (see FIG. 5), the shaft packing 144 also rotates together with the door body parts 141 and 142. When 131 is closed and the side face opening 132 is open, the shaft packing 144 contacts the frame 111 (casing 110) to close the gap 112 (see FIG. 4).
[0017]
Therefore, it is possible to prevent a part of the air flowing through the side face opening 132 from leaking to the center face opening 131 via the gap 112.
In the present embodiment, when the center face opening 131 is closed and the side face opening 132 is opened to close the gap 112, the shaft packing 144 contacts the frame portion 111 (casing 110). In this case, the shaft packing 144 and the frame portion 111 are not in contact with each other. Therefore, generation of noise (abnormal noise) due to sliding (friction) between the shaft packing 144 and the frame portion 111 and wear of the shaft packing 144 can be prevented when the shaft 143 rotates.
[0018]
As described above, in the air passage opening / closing door according to the present embodiment, the gap 112 between the shaft 143 and the frame portion 111 (casing 110) is generated while preventing generation of noise (abnormal noise) and wear of the shaft packing 144. Air can be prevented from leaking out.
By the way, in the above-described embodiment, the present invention is applied to the face openings 131 and 132. However, the application of the present invention is not limited to this, and is also applied to opening and closing of other air passages and openings. can do.
[0019]
In the above-described embodiment, the shaft packing 144 is joined to the shaft 143. However, the present invention is not limited to this, and the shaft main body 141, 142 may be joined to the end on the shaft 143 side. Good.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an air conditioner.
FIG. 2 is a front view of the front of the passenger compartment.
FIG. 3 is a view taken in the direction of arrow A in FIG.
FIG. 4 is an enlarged view of a face opening / closing door showing a state in which only a side face opening is opened.
FIG. 5 is an enlarged view of a face opening / closing door showing a state in which both face opening portions are opened.
FIG. 6 is an enlarged view of a face opening / closing door according to the prior art.
FIG. 7 is an enlarged view of a shaft.
[Explanation of symbols]
110 ... casing, 111 ... frame, 112 ... gap,
131 ... Center face opening, 132 ... Side face opening,
141 ... 1st door main-body part, 142 ... 2nd door main-body part, 143 ... Shaft,
144 ... shaft packing, 145 ... packing.

Claims (3)

An air passage opening / closing door disposed in a casing (111) formed with first and second openings (131, 132) through which air is blown, to open and close both openings (131, 132);
A first door body (141) for opening and closing the first opening (131);
A second door body (142) for opening and closing the second opening (132);
The two door main body portions (141, 142) are rotatably disposed with a gap (112) between the two openings (131, 132) and the casing (1110). One shaft (143) connected to each other,
A packing (144) that rotates with the shaft (143) and opens and closes the gap (112);
The packing (144) contacts the casing (111) and opens the gap (112) when the first opening (131) is closed and the second opening (132) is open. An air passage opening / closing door characterized by closing. 2. The air according to claim 1, wherein the packing (144) protrudes in a radial direction of the shaft (143) and has a ridge shape extending in a longitudinal direction of the shaft (143). Aisle open / close door. The first opening (131) communicates with a center face opening (301) through which air blows out toward the upper body of the occupant at approximately the center of the passenger compartment,
The said 2nd opening part (132) is connected to the side face opening part (302) which air blows off toward a passenger | crew's upper body in the vehicle interior side part, The Claim 1 or 2 characterized by the above-mentioned. Air passage open / close door.

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