JP3772625B2 - Air-conditioning duct blower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blowout device for an air conditioning duct that blows out air, which is temperature-controlled by an air conditioner in a car such as a bus, into a vehicle interior.
[0002]
[Prior art]
Conventionally, air conditioning ducts such as buses have been provided with openings that are conditioned to the passengers or passengers seated on the seats, for example, blown out cold air during cooling, and the openings are usually spaced at appropriate intervals. A louver having a plurality of fins arranged side by side and an adjustment provided so that a plurality of louvers arranged side by side in a direction perpendicular to the fins of the louver can flow out the cold air passing through the louver in a desired direction. Blowout devices with possible fins are widely used.
In the above-described conventional blow-out device, the cool air feeling (which means that the cool air is directly applied to the body of an occupant or passenger) is controlled by adjusting the amount of air supplied to the air-conditioning duct during cooling. For example, in the case of buses, if many passengers feel cold and the air volume of the air-conditioning duct blower installed above each seat is reduced, the total air volume decreases and cooling There are drawbacks in that the capacity is lowered and the temperature distribution in each part of the passenger compartment becomes inappropriate.
[0003]
[Problems to be solved by the invention]
The present invention was devised in view of the drawbacks of the blowout device in the conventional air-conditioning duct. Regardless of the difference in the amount of solar radiation that varies depending on the seat position, the overall air volume can be adjusted regardless of whether you choose a soft cool breeze with a low wind speed or a cool breeze with a relatively large and cool air. Air conditioning that can improve the feeling of individual passengers and passengers without causing major changes and without causing inconveniences that cause partial changes in the temperature distribution in the passenger compartment. The main object is to provide a duct blowing device.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a cylindrical member and a rotating member that are coaxially and relatively rotatably disposed in an opening that blows out temperature-controlled air provided in an air conditioning duct into a vehicle interior. A nozzle member having a bell mouth-shaped air passage which is slidably fitted in the axial direction in the cylindrical member and has a passage area on the vehicle compartment side smaller than that on the duct side, and the rotation An orifice provided at an end of the member on the side of the passenger compartment, having an expanded shape from the duct side toward the passenger compartment, and having an air passage having an equivalent opening area to the bell mouth air passage of the nozzle member; and By rotating one of the cylindrical member and the rotating member with respect to the other, the nozzle member is moved in the axial direction between a first position close to the orifice and a second position spaced inward from the orifice toward the duct. Displacement And a nozzle that is opened on the outer peripheral wall of the tubular member and communicates the duct with the bell mouth air passage of the nozzle member when the nozzle member is in the first position, and the nozzle A second inflow port for communicating the duct and the air passage having the orifice opened when the member is in the second position, and the nozzle moving mechanism is provided on an outer peripheral wall of the cylindrical member or the rotating member. A first guide groove comprising a transverse groove portion extending along a direction substantially orthogonal to the axis, and a slant groove portion extending obliquely from one end of the transverse groove portion with respect to the substantially orthogonal direction, and the cylindrical shape A second guide groove provided on the other outer peripheral wall of the member or the rotary member and extending substantially parallel to the axis, and extending in the diametrical direction on the outer peripheral surface of the nozzle member, the first and second A sliding pin inserted in the guide groove in common It proposes a blowing device of the air conditioning duct, characterized in that is al configured.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
First, in FIGS. 1 to 3, reference numeral 10 denotes an air conditioning duct for supplying air, for example, cold air, which is arranged and extended in the vehicle front-rear direction to a vehicle, in particular, a ceiling portion of a passenger compartment 12 of a bus. (Only a part thereof is shown in the figure), and 14 is an opening, that is, a blow-out opening, which is opened substantially above the passenger or passenger seat of the air-conditioning duct 10. Reference numeral 16 denotes a diffusing orifice having an air passage 18 which is disposed at the outlet 14 and expands from the duct 10 side toward the vehicle compartment 12 side. Reference numeral 24 denotes a nozzle member that is disposed at the outlet 14 and includes a bell mouth-shaped air passage 22 in which a passage area on the vehicle compartment 12 side is smaller than that on the duct 10 side.
[0006]
In the case of FIG. 1 in which a diffusing orifice 16 is provided at the air outlet 14 of the air conditioning duct 10, the cold air in the air conditioning duct 10 diffuses as shown by the arrows in the figure and enters the passenger compartment 12 at a low speed. Therefore, an occupant or passenger sitting in a seat provided below the air outlet 14 has a cool breeze feeling like a soft breeze. On the other hand, in the case of FIG. 2 in which the nozzle member 24 is provided at the air outlet 14, the cold air in the air conditioning duct 10 is relatively high from the bell mouth-shaped converged air passage 22 as indicated by arrows in the figure. Since it flows into the passenger compartment 12 at a speed, an occupant or passenger seated in a seat below the outlet 14 senses a cooler sensible temperature than the temperature of the cold air itself.
[0007]
Therefore, as shown in FIG. 3, the orifice 16 and the nozzle member 24 are arranged substantially coaxially at the air outlet 14 of the air conditioning duct 10, and the orifice 16 and the nozzle member 24 are arranged close to each other as shown. By doing so, a strong cool air feeling can be obtained by relatively high-speed cold air flowing through the bell mouth type air passage 22 (in the above-mentioned proximity arrangement, of course, when the nozzle member 24 is brought into contact with the orifice 16 as shown in the drawing, This includes a case where a slight gap is formed between the nozzle member 24 and the orifice 16 to such an extent that the flow of the cold air through the bell mouth passage 22 is maintained as the main flow). Further, as indicated by an upward arrow in FIG. 3, when the nozzle member 24 is separated from the orifice 16 in the axial direction, the cold air in the air conditioning duct 10 is substantially diffused through the air passage 18 of the orifice 16. Then, the vehicle flows out into the passenger compartment 12 at a low speed, and a soft cool breeze feeling like a breeze is obtained.
[0008]
Therefore, the air passage 18 of the orifice 16 and the air passage 22 of the nozzle member 24 have their respective air passage shapes and cross-sectional areas set in advance so as to have an equivalent opening area to be described later. Even if the cool air is blown out of either the orifice 16 or the nozzle member 24, the flow rate is substantially unchanged, and therefore the flow rate of the cool air as the entire air conditioning duct 10 having the plurality of air outlets 14 does not change. Individual passengers and passengers can enjoy the feeling of cool wind according to their constitutions and differences in the amount of solar radiation depending on their seating position, while preventing them from degrading their performance or adversely affecting the temperature distribution in the passenger compartment 12. Can be obtained. The equivalent opening area refers to an opening that can obtain the same air volume from the blowing member such as the orifice 16 and the nozzle member 24 having various passage shapes and cross-sectional areas under the same pressure difference between inside and outside the duct. It means an area calculated by calculation by replacing with a part. That is, since the flow loss varies depending on the passage shape of the blowing member, the equivalent opening area is usually different even if the outlet area is the same.
[0009]
A first blow-out device in which the orifice 16 having the diffusion type air passage 18 and the nozzle member 24 having the bell mouth type air passage 22 are combined and the nozzle member 24 is displaced relative to the orifice 16 in the axial direction. This embodiment is shown in FIGS.
First, in FIG. 4, reference numeral 26 denotes a bottomed cylindrical cylindrical member having an open lower end. A coaxial base 28 is disposed at the lower end of the cylindrical member 26. The cylindrical member 26 is integrally connected by a plurality of stays 30 (only two are shown in the figure). In the upper part of the cylindrical outer wall 26a of the cylindrical member 26, there are provided a plurality of upper openings 32 that form, for example, four first inlets at appropriate intervals in the circumferential direction. In the lower part of the outer peripheral wall 26a, a plurality of, for example, lower openings 34 that form two second inlets are provided at symmetrical positions in the diameter direction. Further, an outer peripheral wall 26a between the upper opening 32 and the lower opening 34 has a lateral groove portion 36a having a center line extending in a direction substantially perpendicular to the axis, and one end of the lateral groove portion 36a from the one end to the center line. There is provided a first guide groove 36 comprising a slant groove portion 36b extending downward in the oblique direction. In FIG. 4, only the first guide groove 36 on the front side is shown to prevent excessive congestion in the figure, but a pair of guide grooves 36 is also provided on the outer peripheral wall 26 a on the diametrically opposite side. Further, a flange extending inward in the radial direction is provided at the lower end of the outer peripheral wall 26 a, and the flange forms the orifice 16.
[0010]
Further, the peripheral wall 28b rising from the bottom wall 28a of the base 28 is formed in a spherical shape as shown well in FIG. 10, and a cooperating spherical surface provided in the air outlet 14 of the air conditioning duct 10 is provided. Supported by a seat 38. Accordingly, the base 28 is configured to be freely tiltable with respect to the air conditioning duct 10 within a certain angle range integrally with the cylindrical member 26. On the other hand, a circular through hole 28c is formed in the central portion of the bottom wall 28a of the base 28, and an annular gap 40 is formed between the through hole 28c and the outer peripheral wall 26a of the cylindrical member 26. Yes.
[0011]
Next, FIG. 5 shows a hollow cylindrical outer peripheral wall 42a that is inserted into the gap 40 and is coaxially and rotatably fitted to the outer peripheral wall 26a of the cylindrical member 26, and a lower end of the outer peripheral wall 42a. And a second guide groove 44 projecting from the upper end edge of the outer peripheral wall 42a in a diametrical pair and extending substantially parallel to the axis of the cylindrical member 26. The rotation member 42 provided with the protrusion 42c which has is shown. The outer peripheral wall 42 a is provided with a pair of openings 46 that cooperate with the lower opening 34 of the tubular member 26. The outer peripheral wall 42a and the protrusion 42c have a thickness slightly smaller than the radial width of the gap 40. In FIG. 5, for simplicity, the outer peripheral wall 42a and the protrusion 42c are shown by a single line neglecting the thickness. Yes.
Further, FIG. 6 has a cylindrical shape as a whole, and a nozzle member provided with a bell mouth-shaped air passage 22 having a large cross-sectional area on the air conditioning duct 10 side and a small cross-sectional area on the vehicle compartment 12 side in the central portion thereof. 24, a pair of sliding pins 48 that are aligned in the diameter direction project from the outer peripheral surface of the nozzle member 24, and the pins 48 coaxially connect the rotating member 42 to the cylindrical member 26, and The first guide groove 36 and the second guide are fitted in a state in which the nozzle member 26 is fitted inside the tubular member 26 so as to be slidable in the axial direction and assembled in three directions. It penetrates the groove 44 in common.
[0012]
The operation mode of the blowing device comprising the assembly of the cylindrical member 26, the rotating member 42 and the nozzle member 24 will be described with reference to FIGS. First, in FIG. 7 and FIG. 10, the base 28 integrated with the tubular member 26 is described, but in FIG. 8 and FIG. 9, the base 28 is not shown for simplicity.
Now, in FIG. 7, the occupant or the passenger grips the operation ring 42b at the lower end of the rotating member 42 and rotates it around the axis OO, and the sliding pin 48 of the nozzle member 24 indicated by a two-dot chain line in the figure. 2 shows a state where the first guide groove 36 is located at the connection portion between the lateral groove portion 36a and the oblique groove portion 36b and is located at the upper end portion of the second guide groove 44. In this state, the upper opening 32 of the cylindrical member 26 is blocked by the outer peripheral surface of the nozzle member 24 in the raised position or the second position as clearly shown in the right portion of the axis OO in FIG. The lower opening 34 of the cylindrical member 26 and the opening 46 of the rotating member 42 communicate with each other. As a result, the cold air in the air conditioning duct 10 flows through the opening 46 and the lower opening 34 through the diffusion air passage 18 of the orifice 16 while diffusing into the passenger compartment 12 at a moderate speed, and as described above. You can get a gentle cool breeze like a breeze.
[0013]
Next, when the operation ring 42b of the rotating member 42 is rotated clockwise around the axis OO, the second guide groove 44 provided in the protrusion 42c pushes the sliding pin 48 of the nozzle member 24 to the right. The sliding pin 48 descends along the oblique groove portion 36b of the first guide groove 36, so that the nozzle member 24 descends and abuts against the orifice 16 at the lower end of the cylindrical member 26, or a close position where a small gap exists. Displacement to the first position results in the state shown in FIG.
As a result, the first inlet or upper opening 32 of the cylindrical member 26 is opened, and the second inlet or lower opening 34 is closed by the outer peripheral surface of the nozzle member 24. The opening 46 of the rotating member 42 is also closed by the outer peripheral surface of the nozzle member 24. Accordingly, as shown in the left portion of the axis OO in FIG. 10, the cool air in the air conditioning duct 10 passes from the upper opening 32 through the bell mouth air passage 22 of the nozzle member 24 at a relatively high speed. It flows out into the chamber 12, and a higher cool wind feeling is obtained as described above. At this time, since the nozzle member 24 and the orifice 16 have an equivalent opening area, the flow rate of the cool air is substantially equal in any case regardless of the change in the cool wind feeling.
After the rotating member 42 is rotated to the state shown in FIG. 8, when the occupant or the passenger releases his / her hand from the operation ring 42 b, the sliding pin 48 is freely displaced upward along the second guide groove 44. In other words, the rotating member 42 can be lowered to the position where the sliding pin 48 abuts against the upper end of the second guide groove 44 due to its own weight. As shown, an appropriate stopper member 50 is provided on the outer peripheral wall 42 a of the rotating member 42.
[0014]
Further, when the operation ring 42b of the rotating member 42 is rotated counterclockwise around the axis OO from the state shown in FIG. 7, the sliding pin 48 of the nozzle member 24 at the raised position causes the lateral groove portion 36a of the first guide groove 36 to move. 9 is displaced to the other end (the left end in the figure). In this state, the upper opening 32 of the cylindrical member 26 is closed by the nozzle member 24 in the raised position, and the lower opening 34 of the cylindrical member 26 and the opening 46 of the rotating member 42 are separated from each other in the circumferential direction. Since it is displaced, the outflow of cold air from the air conditioning duct 10 to the passenger compartment 12 is stopped. In addition, when cooling in winter is not performed, it is preferable that the blowing devices provided in all the air outlets 14 of the air conditioning duct 10 are in the closed state of FIG.
[0015]
Next, FIGS. 11 to 12 show a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that, as shown in FIG. 12, the outer peripheral wall 42a of the rotating member 42 is not continuous in the circumferential direction but is arranged facing the diameter direction. The outer circumferential wall 42a 'is formed of two partial cylindrical walls, and a circumferential space between the outer circumferential walls 42a' forms an opening 46, and at the lower end portion of the outer circumferential wall 42a '. That is, the slit 52 is formed. Further, as shown in FIG. 11, the lower end of the cylindrical member 26 and the bottom wall 28a of the base 28 are integrally connected, and the outer peripheral wall 42a 'is inserted into the bottom wall 28a. In other words, an arcuate groove 40 ′ for externally fitting to the outer peripheral wall 26 a of the cylindrical member 26 is provided. The slit 52 provided at the lower end portion of the outer peripheral wall 42a 'has an axial height that is slightly larger than the thickness of the bottom wall 28a. The other configurations of the cylindrical member 26 and the base 28 and the configuration of the nozzle member 24 are substantially the same as those of the first embodiment, and therefore, the same reference numerals are given and detailed description thereof is omitted.
[0016]
The operation mode of the second embodiment in which the cylindrical member 26, the rotating member 42, and the nozzle member 24 are assembled is as shown in FIG. The right side portion of the axis OO shows a state in which the sliding pin 48 of the nozzle member 24 is located at a connection portion between the lateral groove portion 36a of the first guide groove 36 and the oblique groove portion 36b. Is in the raised or second position, the first inlet or upper opening 32 of the cylindrical member 26 is closed, the second inlet or lower opening 34 of the cylindrical member 26 and the opening 46 of the rotating member 42. The cold air in the air conditioning duct 10 passes through the lower opening 34 and the opening 46 at a low speed from the diffusion air passage 18 of the orifice 16 formed in the lower end inward of the cylindrical member 26 into the vehicle interior 12. Inflow, and thus a gentle cool breeze like a breeze is obtained.
[0017]
Next, when the operation ring 42b of the rotating member 42 is rotated clockwise around the axis OO, the sliding pin 48 of the nozzle member 24 descends along the oblique groove portion 36b of the first guide groove 36, and the nozzle The member 24 comes into contact with the upper surface of the orifice 16 or descends to a close position having a small gap, that is, the first position, and is in a state illustrated on the left side of the axis OO in FIG. As the nozzle member 24 descends, the upper opening 32 of the cylindrical member 26 is opened and the lower opening 34 and the opening 46 of the rotating member 42 are closed, so that the cold air in the air conditioning duct 10 passes through the bell mouth type air passage 22. It flows into the passenger compartment 12 at a relatively high speed, and a stronger cool wind feeling is obtained. In addition, since the nozzle member 24 and the orifice 16 are set to have an equivalent opening area, the flow rate of the cool air blown from the air conditioning duct 10 into the passenger compartment 12 is substantially equal to the change in the cool wind feeling. equal.
[0018]
Further, when the rotating member 42 is rotated to the right as described above, the slit 52 at the lower end of the partial cylindrical wall is sandwiched by the circumferential extension of the arc-shaped groove 40 ′. Even if it is located at the lower end of the second guide groove 44, the rotating member 42 is not displaced downward by its own weight. Although illustration is omitted, the rotating member 42 is moved to the left from the state where the sliding pin 48 is at the right end position of the lateral groove portion 36a of the first guide groove 36, that is, the state shown in the right half portion of FIG. By rotating to the same position as in the state of FIG. 9 in the first embodiment, the blowout of the cold air from the air conditioning duct 10 into the passenger compartment 12 can be stopped.
[0019]
The present invention is not limited to the first and second embodiments described above, and can be implemented with various changes and modifications within the scope of the claims. For example, the base 28 may be a simple flange and may be fixed to the air outlet 14 of the air conditioning duct 10 with screws, bolts, etc. Of course, in this case, the direction of the axial line OO of the cylindrical member 26, that is, the direction of the cold air blowing flow. Although the direction cannot be changed, the advantages or effects of the present invention can still be obtained. Further, the downward inclination direction of the oblique groove portion 36b of the first guide groove 36 may be reversed from the above-described configuration, and the rotation operation direction of the rotating member 42 may be reversed from the above-described configuration. The oblique groove portion 36b can be changed to extend upward. Further, since the displacement of the nozzle member 24 in the direction of the axis OO with respect to the orifice 16 is performed by relative rotation around the axis OO of the cylindrical member 26 and the rotating member 42, contrary to the above embodiment, The first guide groove 36 can be provided on the rotating member 42 side, and the second guide groove 44 can be provided on the cylindrical member 26 side. Furthermore, contrary to the above-described embodiment, the cylindrical member 26 with respect to the rotating member 42. It can also be changed to rotate. Further, the present invention is particularly suitable when applied to an air-conditioning duct blowing device provided near the ceiling of a passenger compartment of a bus. However, it is obvious that the present invention can be widely applied to various vehicles other than buses.
[0020]
【The invention's effect】
As described above, the air-conditioning duct blowing device according to the present invention is a cylinder that is provided coaxially and relatively rotatably in an opening provided in the air-conditioning duct for blowing out temperature-controlled air into the passenger compartment. And a rotating member, and a bell mouth type air passage that is slidably fitted in the axial direction in the cylindrical member and has a passage area on the vehicle compartment side smaller than that on the duct side. A nozzle member and an air passage which is provided at an end of the rotating member on the side of the passenger compartment and has a shape that expands from the duct side toward the passenger compartment and has an equivalent opening area to the bell mouth air passage of the nozzle member. An orifice provided; a first position adjacent to the orifice by rotating one of the cylindrical member and the rotating member relative to the other; and a second position spaced apart from the orifice toward the inside of the duct. Axis direction between A first moving inlet that is connected to the duct and the bell mouth air passage of the nozzle member when the nozzle member is in the first position, And a second inflow port for communicating the duct and the air passage having the orifice opened when the nozzle member is in the second position, and blowing out the air conditioning duct during the cooling operation of the air conditioner. The speed of the cool air flowing into the passenger compartment from the device can be switched according to the sensual preference of passengers and passengers, the difference in the amount of solar radiation, etc., so that a soft cool wind feeling or a strong cool wind feeling can be obtained. Therefore, it is possible to improve the feelings of individual passengers and passengers without causing a large change in the cooling air flow rate, and without causing a decrease in cooling capacity and a large fluctuation in the temperature distribution in the passenger compartment. There is an advantage that you can.
Further, in the present invention, the nozzle moving mechanism is provided on an outer peripheral wall of the cylindrical member or the rotating member, and extends substantially along a direction substantially orthogonal to the axis, and the substantially groove portion extends from one end of the horizontal groove portion. A first guide groove comprising a slanted groove portion extending obliquely with respect to an orthogonal direction, a second guide groove provided on the other outer peripheral wall of the cylindrical member or the rotating member and extending substantially parallel to the axis, The nozzle member is configured to include a sliding pin that extends in the diametrical direction on the outer peripheral surface of the nozzle member and is inserted into the first and second guide grooves in common. It is possible to provide a blowing device that can be easily attached to the air conditioning duct.
[Brief description of the drawings]
FIG. 1 is a conceptual cross-sectional view showing a case where an orifice having a diffusion air passage is arranged at an air outlet of an air conditioning duct.
FIG. 2 is a conceptual cross-sectional view showing a case where a nozzle member having a bellmouth air passage is disposed at an air outlet of an air conditioning duct.
FIG. 3 is a conceptual cross-sectional view showing a case where an orifice and a nozzle member are arranged at an air outlet of an air conditioning duct.
FIG. 4 is a perspective view of a cylindrical member and a base in the first embodiment of the present invention.
FIG. 5 is a perspective view of a rotating member according to the first embodiment of the present invention.
FIG. 6 is a perspective view of a nozzle member according to the first embodiment of the present invention.
FIG. 7 is a front view showing the blowing device in a state where the members shown in FIGS. 4 to 6 are assembled and the orifice is operated.
8 is a front view showing a state in which a nozzle member is acted on the blowing device shown in FIG. 7;
FIG. 9 is a front view showing when the blowing device shown in FIG. 7 is not operating;
10 is a cross-sectional view of the first embodiment showing the state shown in FIG. 7 on the right side of the axis OO and the state shown in FIG. 8 on the left side.
FIG. 11 is a perspective view of a cylindrical member and a base in a second embodiment of the present invention.
FIG. 12 is a perspective view of a rotating member according to a second embodiment of the present invention.
FIG. 13 is a cross-sectional view of the second embodiment showing when the orifice is operating on the right side of the axis OO and when the nozzle member is operating on the left side.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Air-conditioning duct, 12 ... Car compartment, 14 ... Air outlet (blowing opening), 16 ... Orifice, 18 ... Diffusion type air passage, 22 ... Bellmouth type air passage, 24 ... Nozzle member, 26 ... Cylindrical member, 26a ... outer peripheral wall of cylindrical member, 28 ... base, 32 ... upper opening (first inlet), 34 ... lower opening (second inlet), 36 ... first guide groove, 36a ... lateral groove portion, 36b ... Oblique groove portion, 42... Rotating member, 42 a and 42 a ′, outer peripheral wall of rotating member, 44, second guide groove, 48, sliding pin.

Claims (1)

A cylindrical member and a rotating member that are coaxially and relatively rotatably disposed at an opening provided in the air-conditioning duct to blow out temperature-controlled air into the vehicle interior, and slide in the axial direction within the cylindrical member. A nozzle member provided with a bell mouth-shaped air passage which is movably fitted and has a passage area on the vehicle compartment side smaller than the duct side in the interior thereof, and is provided at the vehicle compartment side end of the rotating member, An orifice having an expanded shape from the duct side toward the passenger compartment side and having an air passage having an equivalent opening area to the bell mouth air passage of the nozzle member, and any one of the tubular member and the rotating member. A nozzle moving mechanism for displacing the nozzle member in an axial direction between a first position close to the orifice and a second position spaced inward of the duct from the orifice by rotating relative to the other; and the cylindrical member Outer circumference And when the nozzle member is in the first position, the duct and the bell mouth-shaped air passage of the nozzle member communicate with each other, and when the nozzle member is in the second position, the duct and the above A second inflow port communicating with an air passage having an expanded orifice;
The nozzle moving mechanism is provided on an outer peripheral wall of the cylindrical member or the rotating member, and extends along a direction substantially orthogonal to the axis, and is inclined with respect to the substantially orthogonal direction from one end of the horizontal groove portion. And a second guide groove provided on the other outer peripheral wall of the tubular member or rotating member and extending substantially parallel to the axis, and an outer periphery of the nozzle member. A blowout device for an air conditioning duct, characterized by comprising a sliding pin extending in a diametrical direction on a surface and inserted in common into the first and second guide grooves .

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