JP3933026B2 - Air passage opening and closing device and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air passage opening and closing device that switches between opening and closing an air passage through which air flows, and a method for manufacturing the same.
[0002]
[Prior art]
As one of the air passage opening and closing devices used in vehicle air conditioners and the like, it consists of a door substrate and a rotating shaft provided on one side thereof, and the door substrate is rotated with respect to this rotating shaft to switch the opening and closing of the air passage. Cantilever doors are known. 7A and 7B show an example of a conventional cantilever door, and FIGS. 8A and 8B show another example of a conventional cantilever door. Yes. In the conventional cantilever door, lip portions 130a and 130b made of an elastic material such as rubber are provided on three sides other than the side on which the rotation shafts 110a and 100b of the door substrates 100a and 100b are provided. Also on the side where the shafts 110a and 110b are provided, seal portions 140a and 140b made of an elastic body are provided on the door substrate 110a or the rotary shaft 110b.
[0003]
The lip portions 130a and 130b are in contact with the sealing surfaces 210a and 210b of the cases 200a and 200b forming the air passage when the cantilever door closes the air passage, and the cases 200a and 200b and the door substrates 100a and 100b. Seal between. Further, the seal portions 140a and 140b seal the gaps between the shaft holding portions 220a and 220b of the cases 200a and 200b and the rotary shafts 110a and 110b.
[0004]
[Problems to be solved by the invention]
However, in these conventional air passage opening and closing devices, even when the cantilever door is closed, the door substrate 110a portion indicated by a circle P in FIG. 7A or indicated by a circle Q in FIG. 8A. A gap exists between the lip portion 130b or the seal portion 140b in the portion and the case 200b. In this way, even when the cantilever door is closed with the air passage, there is a gap around the rotating shaft, so that the air passage opening of the case cannot be completely sealed, and thus there is a problem that wind leakage occurs. there were.
[0005]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an air passage opening and closing device having a cantilever door that can completely seal the air passage and a method for manufacturing the air passage opening and closing device.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, an air passage opening and closing device according to claim 1 includes a case having an opening through which air passes, and a cantilever door rotatably disposed in the case. The portable door is composed of a door base part that opens and closes an opening, a rotating shaft connected to the door base part, and a lip part made of an elastic body fixed on the door base part. It is on one side of the door board part, and protrudes outward from the outer edge of the door board part over the entire circumference of the door board part, and the angle (θ1) formed with the door board part forms an acute angle. In the closing operation of the cantilever door, the seal surface provided around the opening of the case is formed so as to contact the entire periphery of the opening. As described above, the door substrate portion includes the lip portion that contacts the sealing surface of the case over the entire circumference of the opening portion, so that the opening portion of the case can be closed without a gap.
[0008]
Further, as described in claim 2 , the rotary shaft preferably has a cross section perpendicular to the axial direction in a shape obtained by removing a portion close to the lip portion from a circular shape. When the rotary shaft has such a configuration, when a cantilever door is manufactured by integral molding in which a portion near the rotary shaft of the lip portion is forcibly removed, a cantilever door having a rotary shaft having a circular cross section. Compared with manufacturing, the strength in the forcibly removed portion of the mold can be increased.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The air passage opening and closing device of the present embodiment is used for switching the air outlet in the vehicle air conditioner 1 shown in FIG. The vehicle air conditioner 1 has a resin case 3 disposed on the front side of the vehicle interior, and an air conditioning duct 20 that is an air passage for guiding conditioned air into the vehicle interior is formed in the case 3. Has been.
[0011]
On the most upstream side of the air flow of the air conditioning duct 20, an inside / outside air switching box is provided, which has an inside air inlet 21 and an outside air inlet 22. Inside / outside air switching doors 23 are rotatably mounted inside the suction ports 21 and 22, and the inside / outside air switching doors 23 are driven by actuators (not shown) such as servo motors to drive the inside / outside air switching doors 23. The suction port mode is switched between the inside air circulation mode in which only the suction port 21 is opened and the outside air introduction mode in which only the outside air suction port 22 is opened.
[0012]
A centrifugal blower 30 is provided downstream from the inside / outside air switching box, and an evaporator 45 of a refrigeration cycle (not shown) is provided further downstream from the blower 30. The evaporator 45 cools the air blown by the blower 30 by exchanging heat with the refrigerant. Further, a heater core 51 of a cooling water circuit (not shown) is disposed on the downstream side, and this heats the air passing therethrough by exchanging heat with the engine cooling water. In the vicinity of the heater core 51, an air mix door 52 is rotatably attached. The air mix door 52 is driven by an actuator (not shown) such as a servo motor, and the amount of air passing through the heater core 51 and the heater core depending on the stop position. The temperature of the air blown into the passenger compartment is adjusted by adjusting the ratio with the amount of air that bypasses 51.
[0013]
An air outlet switching box is provided on the most downstream side of the air flow of the air conditioning duct 20, which includes a defroster (DEF) air outlet 24 that blows air conditioned air toward the inner surface of the vehicle windshield, and the upper body of the occupant. A face (FACE) air outlet 25 that blows air-conditioned air toward the front and a foot (FOOT) air outlet 26 that blows air-conditioned air toward the feet of the passenger are formed. In the air passage switching device of the present embodiment, FACE mode, bi-level (B / L) mode, FOOT mode, foot differential (F / D) mode, and the mode for blowing conditioned air from these outlets 24 to 26 into the vehicle interior, And a switching device for switching to one of the DEF modes, each is incorporated inside each of the air outlets 24-26.
[0014]
The air passage switching device of the present embodiment has a cantilever door 27 for opening and closing the air outlets 24 to 26, and by driving them by an actuator (not shown) such as a servo motor, It is possible to switch the outlet mode. As shown in FIG. 2, each cantilever door 27 has a door substrate portion 60 having a substantially rectangular plane shape, and a rotating shaft 61 provided on one long side thereof. The door substrate 60 constitutes a highly rigid portion made of a material such as resin, and the rotary shaft 61 is integrally formed. A lip portion 63 is formed on one side of the door substrate portion 60. The lip portion 63 is made of an elastic material, and forms an angle θ1 with respect to the door substrate portion 60 as shown in FIG.
[0015]
As shown in FIG. 3, the cantilever door 27 is rotatably held by the case 3, thereby opening and closing a substantially rectangular opening 70 through which air formed in the case 3 passes. A seal surface 71 is formed around the opening 70 of the case 3 so as to come into contact with the door substrate 60 when the cantilever door 27 closes the opening 70. The lip portion 63 on the door substrate portion 60 is formed in a substantially rectangular shape corresponding to the entire circumference of the opening portion 70 at a portion that contacts the sealing surface 71 of the case 3 when the door substrate portion 60 closes the opening portion 70. Has been.
[0016]
The door substrate portion 60 is made of a resin such as polypropylene, nylon, or ABS, and the lip portion 63 is made of an elastic material such as rubber, silicone rubber, or thermoplastic elastomer (TPE). In addition, the case 3 that forms the opening 70 through which air passes can be made of, for example, the same kind of resin as the door substrate 60.
[0017]
Here, the manufacturing method of the lip | rip part 63 is demonstrated. The lip part 63 inserts and fixes the door substrate part 60 made of resin in a predetermined part in the mold for molding the lip part 63 in advance, and then injects a fluid elastic material into the mold, By solidifying, the door substrate 60 is integrally formed. In this way, the cantilever door 27 is manufactured by integral molding in which a portion near the rotation shaft 61 of the lip portion 63 is forcibly removed, whereby the lip portion 63 is firmly fixed to the door substrate portion 60.
[0018]
According to the air passage opening and closing apparatus of the present embodiment, as described above, since the lip portion 63 is formed on the door substrate portion 60 so as to correspond to the entire circumference of the opening portion 70 of the case 3, the opening portion 70 is formed as a gap. It can seal without. Furthermore, since the lip portion 63 forms an angle θ1 with respect to the door substrate portion 60 as described above, the lip portion 63 is bent when the cantilevered door 27 closes the opening portion 71, and the sealing surface 71 is well It adheres and this improves the sealing performance.
[0019]
In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible as follows.
[0020]
When the draft angle inclined in the direction of the rotation axis 61 of the cantilever door 27 is formed in the opening 70 of the case 3, the lip portion 63 as shown by an angle θ ₂ in FIG. May be configured to be inclined in the direction of the rotation axis 61 so that the central portion thereof is higher. Angle theta ₂ is, for example, 0.5 degrees.
[0021]
Further, since the cantilever door 27 is manufactured by integral molding in which the lip portion 63 is forcibly removed as described above, the portion of the rotating shaft 61 adjacent to the lip portion 63 is removed and the cantilever door 27 is shown in FIG. If it makes such a shape, the thickness of the shaping | molding die of a forced punching part will increase, and intensity | strength will improve. Moreover, as shown in FIG. 6, even if the rotating shaft 61 is offset to the opposite side of the lip portion 63 with respect to the door substrate portion 60, the strength of the forming die at the forcibly removed portion can be improved.
[0022]
In the above embodiment, the present invention is applied to the switching of the air outlets 24 to 26 in the vehicle air conditioner. However, the present invention can also be applied to the inside / outside air switching or the temperature adjustment (air mix). Furthermore, it can also be used for applications other than vehicle air conditioners.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a configuration of a vehicle air conditioner in which an air passage opening and closing device according to an embodiment of the present invention is incorporated.
2A is a front view showing a cantilever door of an air passage opening and closing device, and FIG. 2B is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a view showing a state where a cantilever door is attached to a case of a vehicle air conditioner.
4 is a side view showing a modification of the cantilever door shown in FIGS. 2 (A) and 2 (B). FIG.
5 is a cross-sectional view showing a modification of the cantilever door shown in FIGS. 2 (A) and 2 (B). FIG.
6 is a cross-sectional view showing a modification of the cantilever door shown in FIGS. 2 (A) and 2 (B). FIG.
FIG. 7A is a front view showing an example of a cantilever door in a conventional air passage opening and closing device, and FIG. 7B is a cross-sectional view showing a state where the cantilever door closes an opening of a case. is there.
8A is a front view showing an example of a cantilever door in a conventional air passage opening and closing device, and FIG. 8B is a cross-sectional view showing a state where the cantilever door closes an opening of a case. is there.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 3 Case 27 Cantilever door 60 Door base plate part 61 Rotating shaft 63 Lip part 70 Opening part 71 Seal surface

Claims (2)

A case (3) having an opening (70) through which air passes, and a cantilever door (27) rotatably disposed in the case (3);
The cantilever door (27) includes a door substrate portion (60) for opening and closing the opening (70), a rotating shaft (61) connected to the door substrate portion (60), and the door substrate portion (60). ) In the air passage opening and closing device constituted by the lip portion (63) made of an elastic body fixed thereon,
The lip portion (63) is on one side of the door substrate portion (60) and protrudes outward from the outer edge of the door substrate portion (60) over the entire circumference of the door substrate portion (60). An angle (θ1) formed with the door substrate portion (60) is an acute angle, and the opening portion of the case (3) is closed during the closing operation of the cantilever door (27). An air passage opening and closing device, wherein the air passage opening and closing device is formed so as to abut on a seal surface (71) provided around (70) over the entire circumference of the opening (70). The air passage opening and closing according to claim 1 , characterized in that the rotary shaft (61) has a cross section perpendicular to the axial direction obtained by removing a portion close to the lip portion (63) from a circular shape. apparatus.

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