JP2017149304A - Air blowout device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air blowout device for a vehicle capable of suppressing intrusion of a foreign matter through a blowout opening.SOLUTION: An air blowout device 10 for a vehicle comprises: a casing 11 surrounding an air duct X that leads conditioned air blown out from a vehicular air conditioner to the inside of a cabin through a blowout opening 11a; and flaps 12 arranged in the air duct X, and changing a blowout direction of the conditioned air blown out from the blowout opening 11a to a vehicle longitudinal direction. A rear side wall 11c on a vehicle rear side in the casing 11 is formed with a Coanda surface 11k that bends the conditioned air led by the flaps 12 along them according to a Coanda effect. In the air duct X, the plurality of flaps 12 are disposed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle air blowing device.

  Patent Document 1 discloses a vehicle air blowing device that guides conditioned air generated by a vehicle air conditioner into a vehicle interior. The conditioned air is an air wind for air conditioning the vehicle interior. The vehicle air blowing device includes a casing having a ventilation path inside and a flap disposed in the ventilation path. A ventilation path is a channel | path which guides an air conditioned wind to a vehicle interior via the blower outlet formed in the upper surface of an instrument panel. The ventilation path is formed to extend in the vertical direction of the vehicle. The blower outlet is provided in the windshield side of the upper surface of an instrument panel. The ventilation part in which the flap in the ventilation path is disposed is partitioned by a flap into a rear side ventilation part located on the vehicle rear side and a front side ventilation part located on the vehicle front side. The wall surface of the rear side ventilation portion is smoothly connected to the upper surface of the instrument panel via a curved surface formed in the casing. The flap is slidable in the vehicle longitudinal direction.

  In the vehicle air blowing device described in Patent Literature 1, the defrost mode and the face mode can be switched by moving the flap in the vehicle front-rear direction. The defrost mode is a mode in which conditioned air is blown to the windshield 2. The face mode is a mode in which conditioned air is blown toward the face of the vehicle occupant.

  Specifically, in the vehicle air blowing device described in Patent Document 1, when the blowing mode of the vehicle air conditioner is set to the defrost mode, by moving the flap forward of the vehicle, The channel cross-sectional area is made smaller than the channel cross-sectional area of the rear side ventilation portion. Thereby, since the flow velocity of the airflow in the front side ventilation portion becomes faster than the flow velocity of the airflow in the rear side ventilation portion, the high-speed airflow flows upward along the front side ventilation portion. As a result, the conditioned air can be blown out toward the windshield.

  In addition, the vehicle air blowing device described in Patent Document 1 is configured such that when the blowing mode of the vehicle air conditioner is set to the face mode, the flap is moved to the rear side of the vehicle, whereby the flow path of the rear side ventilation portion. The cross-sectional area is made smaller than the flow path cross-sectional area of the front side ventilation portion. Thereby, since the flow velocity of the airflow in the rear side ventilation portion becomes faster than the flow velocity of the airflow in the front side ventilation portion, the high-speed airflow flows through the rear side ventilation portion. This high-speed airflow is bent toward the vehicle rear side by flowing along the curved surface due to the Coanda effect. As a result, the conditioned air can be blown toward the face of the vehicle occupant.

JP, 2014-210564, A

  By the way, in the vehicle air blowing device described in Patent Document 1, since the air outlet formed in the upper surface of the instrument panel is opened in the vehicle interior, foreign matter is likely to enter from the air outlet. When the foreign matter that has entered from the air outlet reaches the inside of the vehicle air conditioner via the ventilation path, it is difficult to remove the foreign matter from the air outlet. Therefore, it is not preferable because a large-scale operation such as taking out the vehicle air conditioner from the inside of the instrument panel is required.

  This invention is made | formed in view of such a situation, The objective is to provide the air blowing apparatus for vehicles which can suppress the penetration | invasion of the foreign material through a blower outlet.

  A vehicle air blowing device (10) that solves the above problem is a casing (X) that surrounds a ventilation path (X) that guides conditioned air blown from the vehicle air conditioning device (20) into the vehicle interior via the air outlet (11a). 11) and a flap (12) that is arranged in the ventilation path and changes the blowing direction of the conditioned air blown from the blowout port in the vehicle front-rear direction. The rear side wall (11c) on the vehicle rear side in the casing is formed with a Coanda surface (11k) that bends the conditioned air guided by the flap along the Coanda effect. A plurality of flaps are provided.

  According to this configuration, since a plurality of flaps are arranged in the ventilation path, compared to the case where only one flap is arranged, when the foreign substance enters the ventilation path from the outlet, the foreign substance is flapped. It becomes easy to get caught in. For this reason, it is possible to suppress the intrusion of foreign matter through the air outlet.

  In addition, the code | symbol in the bracket | parenthesis as described in the said means and a claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  According to the present invention, it is possible to suppress the intrusion of foreign matter through the air outlet.

It is sectional drawing which shows the cross-sectional structure of the air blowing apparatus for vehicles of 1st Embodiment with the cross-sectional structure of a vehicle air conditioner. It is a schematic diagram which shows typically the structure of the vehicle air conditioner of 1st Embodiment. FIG. 3 is a cross-sectional view showing an enlarged cross-sectional structure around a flap and a louver in the face mode in the vehicle air blowing device according to the first embodiment with the vehicle left-right direction as a normal line. FIG. 3 is a cross-sectional view showing an enlarged cross-sectional structure around the flap and the louver in the face mode in the vehicle air blowing device of the first embodiment with the vehicle front-rear direction as a normal line. It is a top view which shows the planar structure which looked at the blower outlet at the time of the face mode in the air blowing apparatus for vehicles of 1st Embodiment from upper direction. FIG. 3 is a cross-sectional view showing an enlarged cross-sectional structure around the flap and louver in the defrost mode in the vehicle air blowing device of the first embodiment, with the vehicle left-right direction as a normal line. It is sectional drawing which shows the expanded cross-section structure which makes the vehicle front-back direction a normal line around the flap and louver at the time of the defrost mode in the air blowing device for vehicles of 1st Embodiment. It is a top view which shows the planar structure which looked at the blower outlet at the time of the defrost mode in the air blowing apparatus for vehicles of 1st Embodiment from upper direction. FIG. 6 is a cross-sectional view showing an enlarged cross-sectional structure around the flap and louver in the defrost mode in the vehicle air blowing device of the second embodiment, with the vehicle left-right direction as a normal line. It is sectional drawing which shows the expanded sectional structure which makes the normal direction the vehicle front-back direction around the flap and louver at the time of face mode in the air blowing device for vehicles of 3rd Embodiment. FIG. 10 is a cross-sectional view showing an enlarged cross-sectional structure around a flap and a louver in a defrost mode in a vehicle air blowing device according to a fourth embodiment with the vehicle left-right direction as a normal line. It is sectional drawing which shows the expanded sectional structure of the front side wall periphery of the case in the air blowing apparatus for vehicles of other embodiment. It is sectional drawing which shows the expanded sectional structure of the front side wall periphery of the case in the air blowing apparatus for vehicles of other embodiment. It is sectional drawing which shows the expanded sectional structure of the front side wall periphery of the case in the air blowing apparatus for vehicles of other embodiment.

<First Embodiment>
Hereinafter, a first embodiment of a vehicle air blowing device will be described. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  As shown in FIG. 1, the vehicle air blowing device 10 is a device that is mounted on a vehicle and guides the conditioned air blown from the air conditioning case 21 of the vehicle air conditioning device 20 into the vehicle interior via the air outlet 11a. . The blower outlet 11a is opened toward the vehicle upper side on the upper surface 1a of the instrument panel 1. In addition, the thing of the structure similar to the vehicle air blowing apparatus 10 which concerns on this embodiment is generally called a "hybrid differential apparatus."

  The vehicle air conditioner 20 is disposed inside the instrument panel 1 disposed in front of the front seat in the passenger compartment. As shown in FIG. 2, the vehicle air conditioner 20 includes an air conditioning case 21 that forms an outer shell. The air conditioning case 21 constitutes an air passage that guides air into the vehicle interior, which is the air conditioning target space. At the most upstream part of the air flow of the air-conditioning case 21, an inside air inlet 22 for sucking in cabin air (inside air) and an outside air inlet 23 for sucking outside air (outside air) are formed. An inlet opening / closing door 24 for selectively opening and closing the ports 22 and 23 is provided. The inside air inlet 22, the outside air inlet 23, and the inlet opening / closing door 24 constitute inside / outside air switching means for switching the intake air into the air conditioning case 21 between the inside air and the outside air. The operation of the inlet opening / closing door 24 is controlled by a control signal output from a control device of the vehicle air conditioner 20 (not shown). On the downstream side of the air flow of the suction opening / closing door 24, a blower 25 is disposed as a blowing means for blowing air into the passenger compartment.

  An evaporator 26 that cools the conditioned air blown by the blower 25 is disposed on the downstream side of the air flow of the blower 25. The evaporator 26 is a heat exchanger for exchanging heat between the refrigerant flowing inside and the conditioned air, and constitutes a vapor compression refrigeration cycle together with a compressor, a condenser, an expansion valve, and the like (not shown).

  A heater core 27 for heating the air cooled by the evaporator 26 is disposed on the downstream side of the air flow of the evaporator 26. The heater core 27 of the present embodiment is a heat exchanger that heats air using the cooling water of the vehicle engine as a heat source. Further, on the downstream side of the air flow of the evaporator 26, a cold air bypass passage 28 is formed in which the air that has passed through the evaporator 26 flows through the heater core 27.

  Here, the temperature of the conditioned air mixed on the downstream side of the air flow between the heater core 27 and the cold air bypass passage 28 varies depending on the air volume ratio of the conditioned air passing through the heater core 27 and the conditioned air passing through the cold air bypass passage 28.

  For this reason, an air mix door 29 is arranged on the downstream side of the air flow of the evaporator 26 and on the inlet side of the heater core 27 and the cold air bypass passage 28. The air mix door 29 continuously changes the air volume ratio of the cold air flowing into the heater core 27 and the cold air bypass passage 28, and functions as a temperature adjusting means together with the evaporator 26 and the heater core 27. The operation of the air mix door 29 is controlled by a control signal output from the control device of the vehicle air conditioner 20.

  A defroster / face opening 30 and a foot opening 31 are provided at the most downstream portion of the air flow of the air conditioning case 21. The defroster / face opening 30 communicates with the air outlet 11 a provided on the upper surface 1 a of the instrument panel 1 via the vehicle air blowing device 10. The foot opening 31 communicates with the foot outlet 33 via the foot duct 32.

  The air outlet 11a is an air outlet that blows out conditioned air guided from the casing 11 in each blowing mode of the defrost mode and the face mode. Here, the defrost mode is a blowing mode in which conditioned air is blown out to the windshield 2 through the blower outlet 11a to clear the windshield 2 from being clouded. The face mode is a blowing mode in which air-conditioned air is blown out toward the upper body of the front seat occupant of the vehicle. In the present embodiment, the face mode corresponds to another mode that blows conditioned air in a manner different from the defrost mode.

  The blower outlet 11a has an elongated shape in the vehicle width direction, and is disposed over the front of the driver seat and the front of the passenger seat. In addition, the vehicle width direction length of the blower outlet 11a and the arrangement | positioning location in the upper surface 1a can be changed arbitrarily.

  A defroster / face door 34 that opens and closes the defroster / face opening 30 and a foot door 35 that opens and closes the foot opening 31 are arranged on the upstream side of the air flow of the openings 30 and 31. The defroster / face door 34 and the foot door 35 are blowing mode doors that switch the blowing state of air into the vehicle interior.

  As shown in FIG. 1, the vehicle air blowing device 10 is disposed in the instrument panel 1 and communicates with the defroster / face opening 30, thereby conditioned air blown from the defroster / face opening 30. It is designed to lead into the passenger compartment.

  Next, the configuration of the vehicle air blowing device 10 will be described. As shown in FIG. 1, the vehicle air blowing device 10 includes a casing 11, a plurality of flaps 12, a plurality of louvers 13, and a drive mechanism 14. Hereinafter, what is simply described as “up”, “down”, “right”, “left”, “front”, and “rear” refers to “up, down, right, left, front, and rear” based on the vehicle.

  As shown in FIGS. 3 and 4, the casing 11 is a bottomless square cylindrical duct extending in the vehicle vertical direction. Specifically, the casing 11 includes a front side wall 11b positioned on the front side, a rear side wall 11c positioned on the vehicle rear side, a right side wall 11d positioned on the right side of the vehicle, and a left side wall 11e positioned on the left side of the vehicle. Yes. The space surrounded by the casing 11 constitutes a ventilation path X that guides the conditioned air blown from the defroster / face opening 30 into the vehicle interior via the air outlet 11a. The lower end of the casing 11 is connected to the above-described defroster / face opening 30, and the upper end is an air outlet 11 a.

  As shown in FIG. 3, the conditioned air flows through the ventilation path X in a direction S parallel to the vehicle vertical direction. Hereinafter, the direction S is referred to as “flow direction of the conditioned air”. In the ventilation path X, a flap 12, a louver 13, and the like are arranged.

  On the inner surface of the front side wall 11b, a first wall surface 11f and a second wall surface 11g are sequentially arranged from the defroster / face opening 30 toward the air outlet 11a, that is, along the flow direction of the conditioned air in the ventilation path X. Is formed. The first wall surface 11f is a surface parallel to the flow direction S of the conditioned air. The upper end portion of the first wall surface 11f is connected to the second wall surface 11g through the step portion 11h. The second wall surface 11g is a portion arranged in the ventilation path X rather than the first wall surface 11f, and is a surface parallel to the flow direction S of the conditioned air.

  On the inner surface of the rear side wall 11c, a flat surface 11i, a lower Coanda surface 11j, and an upper Coanda surface 11k are formed in this order from the defroster / face opening 30 toward the outlet 11a. The flat surface 11i is a portion facing the first wall surface 11f of the front side wall 11b. The plane 11i is a plane parallel to the flow direction S of the conditioned air. The lower Coanda surface 11j is a curved surface that extends from the upper end of the flat surface 11i toward the ventilation path X and gradually bends toward the vehicle upper side as it extends into the ventilation path X. The upper Coanda surface 11k is a curved surface that gently curves toward the vehicle rear side as it extends upward.

  The plurality of flaps 12 are arranged in the ventilation path X side by side at equal intervals in the vehicle front-rear direction. More specifically, the plurality of flaps 12 are disposed in a region between the second wall surface 11g of the front side wall 11b and the lower Coanda surface 11j of the rear side wall 11c. The flap 12 is a wing-shaped member. The driving mechanism 14 drives each flap 12 to change the inclination angle (corresponding to an example of the posture) of each flap 12, thereby switching the blowing mode. The inclination angle is an inclination angle θ1 to θ3 that each flap 12 forms with respect to the flow direction S of the conditioned air in the ventilation path X, as shown in the drawing.

  Each flap 12 has two plate members. Each plate member of the flap 12 is fixed to the flap shaft 15 and extends symmetrically with respect to the flap shaft 15. Each plate member of the flap 12 extends from the most part in the longitudinal direction of the flap shaft 15 in the ventilation path X inside the casing 11 so as to be away from the rotation center of the flap shaft 15. Each of the flaps 12 configured in this manner rotates coaxially and integrally with the flap shaft 15 around the left-right direction. That is, the flap shaft 15 is the rotation axis of the flap 12.

  The flap shaft 15 is disposed at a position that passes straight through the casing 11 in the left-right direction, one end is pivotally supported on the right side wall 11 d of the casing 11, and the other end is pivotally supported on the left side wall 11 e of the casing 11. The flap shaft 15 rotates based on the power transmitted from the drive mechanism 14. When the flap 12 rotates in the vehicle front-rear direction based on the rotation of the flap shaft 15, the blowing direction of the conditioned air blown from the air outlet 11 a is changed to the vehicle front-rear direction.

  The plurality of louvers 13 are arranged side by side at equal intervals in the longitudinal direction of the air outlet 11a in the ventilation path X, that is, in the left-right direction of the vehicle. More specifically, the plurality of louvers are arranged in a region corresponding to the space between the first wall surface 11f of the front side wall 11b and the flat surface 11i of the rear side wall 11c. The louver 13 is driven by the drive mechanism 14 in order to adjust the air volume distribution of the conditioned air in the longitudinal direction of the air outlet 11a.

  The louver 13 has two flat plate members, each of which is fixed to a louver shaft 16 corresponding to each of the plurality of louvers 13 and extends symmetrically with respect to the louver shaft 16. These two plate members extend from most of the longitudinal direction of the louver shaft 16 in the ventilation path X inside the casing 11 so as to be away from the rotation center of the louver shaft 16. Each louver 13 configured in this manner rotates coaxially and integrally with the louver shaft 16 about the front-rear direction.

  The louver shaft 16 is a rod-shaped member that extends straight in the front-rear direction. The louver shaft 16 has a front end passing through the front side wall 11b of the casing 11 and pivotally supported by a portion of the first wall surface 11f of the front side wall 11b, and a rear end side of the louver shaft 16 being a portion of the plane 11i of the rear side wall 11c. Be supported. The louver shaft 16 is positioned below the flap 12 and the flap shaft 15. The louver shaft 16 rotates based on the power transmitted from the drive mechanism 14. When the louver 13 rotates in the left-right direction of the vehicle based on the rotation of the louver shaft 16, the blowing direction of the conditioned air blown out from the air outlet 11a is changed to the left-right direction of the vehicle.

Next, an operation example of the vehicle air blowing device 10 will be described.
When the balloon mode is set to the face mode, the postures of the flaps 12 are set as shown in FIG. That is, the flap 12 is inclined with respect to the flow direction S of the conditioned air in the ventilation path X so that the conditioned air is guided to the upper Coanda surface 11k of the rear side wall 11c. When the balloon mode is set to the face mode, each posture of the louver 13 is set as shown in FIG. That is, the louver 13 is set in a posture parallel to the flow direction S of the conditioned air. At this time, as shown in FIG. 5, when the air outlet 11 a is viewed from directly above, the plurality of flaps 12 and the plurality of louvers 13 are arranged in a lattice shape so that the side surfaces of the flaps 12 block the ventilation path X. It is in a state.

  In such a face mode, the conditioned air entering the ventilation path X from the defroster / face opening 30 is guided to the louver 13 as shown in FIG. Proceed without being. The conditioned air that has passed through the louver 13 passes next to the flap 12. As shown in FIG. 3, in the face mode, the flow path of the rear side ventilation portion X1 formed between the flap 12 facing the rear side wall 11c of the casing 11 and the rear side wall 11c as compared with the defrost mode. The cross-sectional area becomes narrower. Therefore, the flow velocity of the airflow flowing through the rear side ventilation portion X1 can be made faster than in the defrost mode. Thereby, a high-speed airflow is formed in the rear side ventilation portion X1. The conditioned air that has become a high-speed air current flows along the upper Coanda surface 11k and the upper surface 1a of the instrument panel 1 by the Coanda effect, and is bent toward the vehicle rear side. As a result, the conditioned air (for example, cold air) whose temperature is adjusted by the vehicle air conditioner 20 is blown out from the air outlet 11a toward the upper body of the occupant.

  On the other hand, when the blowing mode is set to the defrost mode, the postures of the flaps 12 are set as shown in FIG. That is, the flap 12 is set in a posture parallel to the flow direction S of the conditioned air. Further, when the blowing mode is set to the defrost mode, the respective postures of the louvers 13 are set as shown in FIG. That is, the louver 13 is set in a posture inclined with respect to the flow direction S of the conditioned air in the ventilation path X so that the conditioned air is guided to the right side wall 11d and the left side wall 11e. At this time, as shown in FIG. 8, when the air outlet 11a is viewed from directly above, the plurality of flaps 12 and the plurality of louvers 13 are arranged in a lattice pattern.

  In such a defrost mode, the conditioned air entering the ventilation path X from the defroster / face opening 30 is guided to the louver 13 as shown in FIG. ,move on. The conditioned air that has passed through the louver 13 passes next to the flap 12. As shown in FIG. 6, in the defrost mode, the channel cross-sectional area of the rear side ventilation portion X1 is larger than that in the face mode. Therefore, a high-speed airflow is not sufficiently formed in the rear side ventilation portion X1, and the airflow flows upward along the front side wall 11b. As a result, the conditioned air whose temperature has been adjusted by the vehicle air conditioner 20 is blown out toward the windshield 2 from the air outlet 11a. Thereby, fogging of the windshield 2 can be eliminated.

  According to the vehicle air blowing device 10 of the present embodiment described above, the operations and effects shown in the following (1) to (3) can be obtained.

  (1) Since a plurality of flaps 12 are arranged in the ventilation path X, compared to the case where only one flap is arranged, when a foreign object enters the ventilation path X from the air outlet 11a, this foreign object Becomes easy to catch on the flap 12. For this reason, it is possible to suppress the intrusion of foreign matter through the air outlet 11a.

  (2) As a method for suppressing the intrusion of foreign matter through the air outlet 11a, a method of separately providing a lattice-like rib in the air outlet 11a is conceivable. However, when such ribs are provided in the air outlet 11a, the air-conditioned air blown from the air outlet 11a passes through the ribs, so that pressure loss occurs in the air-conditioned air, which may reduce the air speed and air volume of the air-conditioned air. . Moreover, when the lattice-shaped rib is provided in the blower outlet 11a, since the wind direction of the conditioned air is slightly changed by the rib, it is difficult to execute the wind direction control with high accuracy. In this respect, in the vehicle air blowing device 10 according to the present embodiment, it is possible to suppress the intrusion of foreign matters without providing a separate rib. The wind direction can be controlled with high accuracy.

  (3) The plurality of flaps 12 are arranged side by side at equal intervals in the vehicle longitudinal direction. The plurality of louvers 13 are arranged side by side at equal intervals in the left-right direction of the vehicle. As a result, as shown in FIGS. 5 and 8, a plurality of flaps and a plurality of louvers are arranged in a grid pattern in both the face mode and the defrost mode. Therefore, even if a foreign object rolls from the upper surface 1a of the instrument panel 1 to the upper Coanda surface 11k and enters the ventilation path X, or even if the foreign object falls from directly above the air outlet 11a, the foreign object is the flap 12. It becomes easy to get caught in. For this reason, it is possible to suppress the intrusion of foreign matter through the air outlet 11a.

Second Embodiment
Next, a second embodiment of the vehicle air blowing device 10 will be described. Hereinafter, the difference from the first embodiment will be mainly described.

  As shown in FIG. 9, in the vehicle air blowing device 10 of the present embodiment, the distance between the flaps 12, 12 adjacent in the vehicle front-rear direction is narrower as the portion is closer to the rear side wall 11c. In other words, the plurality of flaps 12 are arranged side by side at unequal intervals in the vehicle longitudinal direction.

  According to the vehicle air blowing device 10 of the present embodiment described above, in addition to the operations and effects of (1) and (2) of the first embodiment, the operations and effects shown in the following (4) are obtained. Can do.

  (4) The path through which foreign matter is most likely to enter in the longitudinal direction of the vehicle is considered to be a path that rolls from the upper surface 1a of the instrument panel 1 to the upper Coanda surface 11k and enters the air outlet 11a. In this respect, in the vehicle air blowing device 10 of the present embodiment, the distance between the adjacent flaps 12 and 12 becomes narrower as the portion closer to the rear side wall 11c, and therefore rolls on the upper Coanda surface 11k and blows out the air outlet 11a. The foreign matter that intrudes into the flap is more easily caught on the flap 12. For this reason, it is possible to suppress the intrusion of foreign matter more accurately.

<Third Embodiment>
Next, a third embodiment of the vehicle air blowing device 10 will be described. Hereinafter, the difference from the first embodiment will be mainly described.

  As shown in FIG. 10, in the vehicle air blowing device 10 of the present embodiment, the portion between the louvers 13 and 13 adjacent in the vehicle left-right direction is closer to the right side wall 11 d of the casing 11, and the left side wall 11 e. The closer the part is, the narrower it is. That is, the plurality of louvers 13 are arranged side by side at unequal intervals in the vehicle left-right direction.

  According to the vehicle air blowing device 10 of the present embodiment described above, in addition to the operations and effects of (1) and (2) of the first embodiment, the operations and effects shown in the following (5) are obtained. Can do.

  (5) The path through which foreign matter is most likely to enter in the left-right direction of the vehicle is considered to be the path that enters the air outlet 11a from the right side wall 11d or the left side wall 11e of the casing 11. In this respect, in the vehicle air blowing device 10 of the present embodiment, the interval between the adjacent louvers 13 and 13 is narrower as the portion closer to the right side wall 11d and the portion closer to the left side wall 11e. Foreign matter that rolls on the wall 11d or the left side wall 11e and enters the air outlet 11a is easily caught on the louver 13. For this reason, it is possible to suppress the intrusion of foreign matter more accurately.

<Fourth embodiment>
Next, a fourth embodiment of the vehicle air blowing device 10 will be described. Hereinafter, the difference from the first embodiment will be mainly described.

  As shown in FIG. 11, in this embodiment, reference numerals 12 a, 12 b, and 12 c are sequentially provided from a plurality of flaps that are disposed from the front of the vehicle toward the rear of the vehicle and from the one that is disposed at the front of the vehicle. It is attached. Similarly, the reference numerals 15a, 15b, and 15c are also attached to the flap shafts corresponding to the flaps 12a, 12b, and 12c. Hereinafter, the flap 12a adjacent to the front side wall 11b of the casing 11 is also referred to as a “front side wall flap”.

  As shown in FIG. 11, in the vehicle air blowing device 10 of the present embodiment, the flap shafts 15 a to 15 c are arranged on the downstream side in the flow direction S of the conditioned air from the stepped portion 11 h.

  The flaps 12a to 12c are set in a posture parallel to the flow direction S of the conditioned air as shown by a solid line in the drawing in the defrost mode. In this case, the distance between the front side wall side flap 12a and the front side wall 11b is “L1”.

  In the face mode, the flaps 12a to 12c are arranged in the flow direction S of the conditioned air so that the upstream end of the flow direction S of the conditioned air approaches the second wall surface 11g, as indicated by a two-dot chain line in the drawing. It becomes a posture inclined with respect to it. In this case, the distance between the front sidewall flap 12a and the front sidewall 11b is “L2”, which is shorter than “L1”.

  According to the vehicle air blowing device 10 of the present embodiment described above, in addition to the operations and effects (1) to (3) of the first embodiment, the operations and effects shown in the following (6) are obtained. Can do.

  (6) When the blowing mode is set to the face mode, the distance between the front side flap 12a and the front side wall 11b does not increase compared to the defrost mode. Therefore, if the distance L1 is set so that foreign matter does not enter when the blowing mode is set to the defrost mode, entry of foreign matter can be suppressed even when the blowing mode is set to the face mode.

<Other embodiments>
In addition, each embodiment can also be implemented with the following forms.
-In the air blowing device 10 for vehicles of 2nd Embodiment, you may change suitably the position where the space | interval between adjacent flaps 12 and 12 is narrow. In short, it is only necessary that the interval between adjacent flaps 12 and 12 becomes narrower as the foreign substance easily enters. In other words, it is only necessary that the plurality of flaps 12 be arranged at unequal intervals in the vehicle front-rear direction in accordance with the portion where foreign matter is likely to enter.

  -In the air blowing device 10 for vehicles of 3rd Embodiment, you may change suitably the position where the space | interval between adjacent louvers 13 and 13 is narrow. In short, it is only necessary that the interval between adjacent louvers 13 and 13 becomes narrower as the portion in which foreign matter easily enters. In other words, the plurality of louvers 13 need only be arranged at unequal intervals in the left-right direction of the vehicle in accordance with the portion where foreign objects are likely to enter.

  -In the air blowing device 10 for vehicles of 4th Embodiment, you may change suitably the positional relationship of the front wall side flap 12a and flap shaft 15a-15c. For example, as shown in FIG. 12, the flap shaft 15a and the flap shafts 15b and 15c (not shown) may be arranged downstream of the stepped portion 11h in the flow direction S of the conditioned air. In this case, in the face mode, the flap 12a has a flow direction S of the conditioned air so that the downstream end of the flow direction S of the conditioned air approaches the second wall surface 11g as indicated by a two-dot chain line in the drawing. It becomes the posture inclined with respect to. Even in such a configuration, the distance between the front side flap 12a and the front side wall 11b is “L3” shorter than “L1” in the face mode. Therefore, the same operation and effect as (6) of the fourth embodiment can be obtained.

  -As FIG. 13 shows, the 1st wall surface 11f of the front side wall 11b may be arrange | positioned in the ventilation path X rather than the 2nd wall surface 11g. In this case, as shown in the drawing, the flap shaft 15a and the flap shafts 15b and 15c (not shown) may be arranged downstream of the stepped portion 11h in the flow direction S of the conditioned air. Further, as shown by a two-dot chain line in the figure, in the face mode, the flap 12a is placed in the air flow direction S so that the upstream end of the air flow direction S approaches the first wall surface 11f. Set to an inclined posture. Even in such a configuration, the distance between the front side flap 12a and the front side wall 11b is “L4” shorter than “L1” in the face mode. Therefore, the same operation and effect as (6) of the fourth embodiment can be obtained.

  When the first wall surface 11f of the front side wall 11b is disposed in the ventilation path X rather than the second wall surface 11g, the flap shaft 15a and the flap shafts 15b and 15c (not shown) are stepped as shown in FIG. You may arrange | position in the upstream of the flow direction S of an air conditioning wind rather than the part 11h. In this case, as indicated by a two-dot chain line in the figure, in the face mode, the flap 12a is made to flow in the conditioned air flow direction S so that the downstream end of the conditioned air flow direction approaches the first wall surface 11f. And set to a tilted posture. Even in such a configuration, the distance between the front side flap 12a and the front side wall 11b is “L5” shorter than “L1” in the face mode. Therefore, the same operation and effect as (6) of the fourth embodiment can be obtained.

  -The shape and drive system of the flap 12 can be changed as appropriate. For example, the flap 12 is not limited to changing the blowing direction of the conditioned air by rotation, but changes the blowing direction of the conditioned air by sliding in the direction perpendicular to the flow direction S of the conditioned air in the ventilation path X. You may do.

  The structure of the vehicle air blowing device 10 can be changed as appropriate. For example, the vehicle air blowing device 10 may have a structure in which the louver 13 is not provided.

  -Another mode which blows off air-conditioning wind in a mode different from the defrost mode is not limited to the face mode, and any blowing mode can be adopted. As another mode of this type, for example, there is a mode in which air is blown out toward a position slightly shifted from the upper body of the front seat occupant.

  -This invention is not limited to said specific example. That is, the above-described specific examples that are appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, and can be changed as appropriate. Moreover, each element with which embodiment mentioned above is provided can be combined as long as it is technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

X: Ventilation path 2: Windshield 11: Casing 11a: Air outlet 11c: Rear side wall 11d: Right side wall 11e: Left side wall 11k: Coanda surface 12: Flap 13: Louver 20: Air conditioner for vehicle

Claims (9)

A casing (11) that surrounds a ventilation path (X) that guides conditioned air blown from the vehicle air conditioner (20) into the vehicle interior via the air outlet (11a);
A flap (12) that is arranged in the ventilation path and changes the blowing direction of the conditioned air blown out from the air outlet in the vehicle front-rear direction,
The rear side wall (11c) on the vehicle rear side in the casing is formed with a Coanda surface (11k) that bends the conditioned air guided by the flap along the Coanda effect,
A vehicle air blowing device provided with a plurality of the flaps. The vehicle air blowing device according to claim 1, wherein the plurality of flaps are arranged side by side at equal intervals in the vehicle front-rear direction. The vehicle air blowing device according to claim 1, wherein the plurality of flaps are arranged side by side at unequal intervals in the vehicle front-rear direction. The vehicle air blowing device according to claim 3, wherein an interval between the flaps adjacent to each other in the vehicle front-rear direction becomes narrower as it approaches the rear side wall. A plurality of louvers (13) that are arranged in the air passage in the left-right direction of the vehicle and that change the blowing direction of the conditioned air blown from the air outlet in the left-right direction of the vehicle are further provided. The vehicle air blowing device according to claim 1. The vehicle air blowing device according to claim 5, wherein the plurality of louvers are arranged at equal intervals in the vehicle left-right direction. The vehicle air blowing device according to claim 5, wherein the plurality of louvers are arranged at unequal intervals in the vehicle left-right direction. The vehicle air blowing device according to claim 7, wherein an interval between the louvers adjacent in the left-right direction of the vehicle becomes narrower as it approaches a side wall (11 d, 11 e) of the casing in the left-right direction of the vehicle. A front wall (11b) on the front side of the vehicle in the casing is connected to the first wall surface via a first wall surface (11f) and a step portion (11h) along the flow direction of the conditioned air in the ventilation path. The connected second wall surface (11g) is formed in order,
One wall surface of the first wall surface and the second wall surface is disposed in the ventilation path more than the other wall surface,
Among the plurality of flaps, the front side wall flap (12a) adjacent to the front side wall has the front side when the front side wall flap is inclined with respect to the flow direction of the conditioned air in the ventilation path. The distance from the side wall is arranged to be shorter than the distance from the front side wall when the front side wall flap is in a posture parallel to the flow direction of the conditioned air in the ventilation path. The vehicle air blowing device according to claim 8.

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