Patent Publication Number: US-2019176761-A1

Title: Vehicle air conditioning duct structure

Description:
INCORPORATION BY REFERENCE 
     The disclosure of Japanese Patent Application No. 2017-238056 filed on Dec. 12, 2017 including the specification, drawings and abstract is incorporated herein by reference in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a vehicle air conditioning duct structure. 
     2. Description of Related Art 
     In a defroster device for removing (clarifying) a frost of a windshield glass, Japanese Patent Application Publication No. 2014-31043 (JP 2014-31043 A) discloses a structure in which an air outlet of a front defroster nozzle is disposed in a center portion of a vehicle width direction inside an instrument panel. In JP 2014-31043 A, a side defroster nozzle is connected to a front pillar and an air current is generated from a front pillar garnish toward a vehicle rear side along a front side glass so that air blowing from the air outlet of the front defroster nozzle is guided outward in the vehicle width direction. Similarly, as a structure in which the air outlet of the front defroster nozzle is disposed in the center portion of the vehicle width direction, a structure disclosed in Japanese Patent Application Publication No. 2000-233721 (JP 2000-233721 A) and Japanese Patent Application Publication No. 4-66353 (JP 4-66353 A) is known. 
     SUMMARY 
     Recently, there is a tendency that the instrument panel decreases in thickness in order to improve the design of a vehicle interior. However, as disclosed in JP 2014-31043 A, JP 2000-233721 A, and JP 4-66353 A, in the structure in which the front defroster nozzle is provided in the center portion of the vehicle width direction inside the instrument panel, since there is a need to ensure the air outlet of the front defroster nozzle inside the instrument panel, the instrument panel increases in size. Further, in order to handle an increase in size or the like of the head-up display device, a structure for saving a space inside the instrument panel has been demanded. 
     The disclosure provides a vehicle air conditioning duct structure capable of clarifying a frost of a windshield glass and a front side glass and saving a space inside an instrument panel. 
     A vehicle air conditioning duct structure according to a first aspect of the disclosure includes a front defroster nozzle which is provided in a vehicle front part, extends in a vehicle width direction, and is formed such that one end portion is connected to an air conditioning device disposed on a rear surface side of an instrument panel and the other end portion is disposed inside a front pillar and is provided with a front side air outlet opening toward a windshield glass, and a side defroster nozzle which is branched from an upstream side of the front side air outlet of the front defroster nozzle and of which a tip portion is provided with a side air outlet opening toward a front side glass. 
     In the vehicle air conditioning duct structure according to the first aspect, the front defroster nozzle extending in the vehicle width direction is provided in the vehicle front part and one end portion of the front defroster nozzle is connected to the air conditioning device disposed on the rear surface side of the instrument panel. Further, the other end portion of the front defroster nozzle is disposed inside the front pillar and the other end portion is provided with the front side air outlet opening toward the windshield glass. Accordingly, air blowing from the air conditioning device blows from the front pillar toward the windshield glass through the front defroster nozzle. As a result, it is possible to remove (clarify) the frost of the windshield glass even when the front side air outlet of the front defroster nozzle is not disposed in the center portion of the vehicle width direction inside the instrument panel. In this way, it is possible to save a space inside the instrument panel to a degree in which the front side air outlet of the front defroster nozzle may not be provided inside the instrument panel. 
     Further, the side defroster nozzle is branched from the upstream side of the front side air outlet of the front defroster nozzle and the tip portion of the side defroster nozzle is provided with the side air outlet opening toward the front side glass. In this way, since the side defroster nozzle is branched from the front defroster nozzle, a part of the front defroster nozzle can be shared with the side defroster nozzle. The “upstream side” mentioned herein means the upstream side of the air current blowing from the air conditioning device and the “upstream side of the front side air outlet” means a side near the air conditioning device in relation to the front side air outlet. 
     In the first aspect, the tip portion of the side defroster nozzle may be disposed inside the front pillar. 
     According to the above aspect, both of the front side air outlet of the front defroster nozzle and the side air outlet of the side defroster nozzle are disposed inside the front pillar. Accordingly, the air outlet can be integrated in the front pillar. 
     According to the above aspect, there is an excellent effect that the degree of freedom in design of the vehicle interior can be improved as compared with a configuration in which the air outlet is disposed in each of the instrument panel and the pillar. 
     In the first aspect, the front defroster nozzle may be provided with a guide portion which guides a part of air blowing from the front side air outlet toward a lower side of the windshield glass. 
     According to the above aspect, a part of air blowing from the front side air outlet blows toward the lower side of the windshield glass by the guide portion. Here, a general display region of the head-up display device in the vehicle equipped with the head-up display device is set to the lower side of the windshield glass. For this reason, since air blows from the front defroster nozzle toward the lower side of the windshield glass, it is possible to effectively remove (clarify) the frost of the display region of the head-up display device. 
     In the first aspect, a vehicle interior side of the front pillar may be formed by a pillar garnish, the pillar garnish may include a lateral wall portion which faces inward in the vehicle width direction and a front wall portion which extends from a front end portion of the lateral wall portion outward in the vehicle width direction and faces the windshield glass, and the front wall portion may be provided with a front opening portion communicating with the front side air outlet. 
     According to the above aspect, the front opening portion is formed in the front wall portion of the pillar garnish forming the vehicle interior side of the front pillar and the front opening portion communicates with the front side air outlet of the front defroster nozzle. Here, the front wall portion of the pillar garnish extends outward in the vehicle width direction from the front end portion of the lateral wall portion facing the inside of the vehicle width direction and faces the windshield glass. For this reason, the front side air outlet (the front opening portion) cannot be easily viewed from the passenger. 
     According to the above aspect, there is an excellent effect that the design of the front pillar can be improved. 
     In the first aspect, in top view, the front defroster nozzle may include a width direction extension portion which is a portion being on a vehicle rear side of a head-up display device and extending in the vehicle width direction along the head-up display device and a front and rear direction extension portion which is a portion being on the outside of the head-up display device in the vehicle width direction and extending from an outer end portion of the width direction extension portion in the vehicle width direction in a vehicle front and rear direction. 
     According to the above aspect, in top view, the front defroster nozzle includes the width direction extension portion which extends in the vehicle width direction and the front and rear direction extension portion which extends in the vehicle front and rear direction from the outer end portion of the width direction extension portion in the vehicle width direction. Further, the width direction extension portion extends toward the vehicle rear side of the head-up display device along the head-up display device and the front and rear direction extension portion extends toward the outside of the head-up display device in the vehicle width direction. That is, the front defroster nozzle is disposed to go around the head-up display device from the vehicle rear side to the outside of the vehicle width direction in top view. Here, for example, when the front defroster nozzle is disposed to go around the head-up display device from the inside of the vehicle width direction to the vehicle front side in top view, the front defroster nozzle is disposed on the inside of the head-up display device in the vehicle width direction, then, when the head-up display device extends in the vehicle width direction, there is a possibility that the head-up display device may interfere with the front defroster nozzle. In contrast, when the front defroster nozzle is disposed to go around the head-up display device from the vehicle rear side to the outside of the vehicle width direction, it is possible to suppress the interference between the front defroster nozzle and the head-up display device even when the head-up display device extends in the vehicle width direction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features, advantages, and technical and industrial significance of exemplary embodiments of the disclosure will be described below with reference to the accompanying drawings, in which like numerals denote like elements, and wherein: 
         FIG. 1  is an enlarged perspective view showing a side defroster nozzle and a tip portion of a front defroster nozzle constituting a vehicle air conditioning duct structure according to an embodiment; 
         FIG. 2  is an enlarged perspective view corresponding to  FIG. 1  when a vehicle front part adopting the vehicle air conditioning duct structure according to an embodiment is viewed from a vehicle interior side; 
         FIG. 3  is an enlarged perspective view showing  FIG. 2  at a different angle and is a diagram showing a state when viewed from a driver seat; 
         FIG. 4  is a top view of the vehicle air conditioning duct structure according to an embodiment; 
         FIG. 5  is a rear view showing the vehicle air conditioning duct structure according to an embodiment when viewed from a vehicle rear side; 
         FIG. 6  is an outline diagram illustrating a flow of air blowing from a front defroster nozzle constituting the vehicle air conditioning duct structure according to an embodiment to a windshield glass and is a diagram when viewed from a vehicle rear side; 
         FIG. 7  is an outline diagram illustrating a flow of air blowing from the front defroster nozzle constituting the vehicle air conditioning duct structure according to an embodiment to the windshield glass and is a diagram when viewed from a vehicle width direction; and 
         FIG. 8  is a top view of a vehicle air conditioning duct structure according to a comparative example. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     Hereinafter, a vehicle air conditioning duct structure according to embodiments will be described with reference to the drawings. The arrow FR appropriately shown in each of the drawings indicates the vehicle front side, the arrow UP indicates the upper side of the vehicle, and the arrow RH indicates the right side in the vehicle width direction. Hereinafter, when a description is made using front and rear, right and left, and up and down directions, it is assumed that these directions indicate front and rear in the front and rear direction of the vehicle, right and left in the vehicle right and left direction (the vehicle width direction), and up and down in the vehicle up and down direction unless otherwise specified. 
     As shown in  FIGS. 4 and 5 , the vehicle air conditioning duct structure according to an embodiment includes a front defroster nozzle  10  and a side defroster nozzle  12 . The front defroster nozzle  10  extends in the vehicle width direction and is provided as a pair of right and left nozzles in the embodiment. Further, the side defroster nozzle  12  extends in the vehicle up and down direction and is provided as a pair of right and left nozzles in the embodiment. In the following description, the right front defroster nozzle  10  will be referred to as a front defroster nozzle  10 R and the left front defroster nozzle  10  will be referred to as a front defroster nozzle  10 L. Further, the side defroster nozzle  12  on the side of the front defroster nozzle  10 R will be referred to as a side defroster nozzle  12 R and the side defroster nozzle  12  on the side of the front defroster nozzle  10 L will be referred to as a side defroster nozzle  12 L. 
     The right front defroster nozzle  10 R is located at the right side in relation to the center portion of the vehicle width direction and includes a nozzle base portion  14 R, a nozzle body portion  16 R, and a nozzle tip portion  18 R. Further, the front defroster nozzle  10 R is formed in a cylindrical shape on the whole and includes an air passage formed therein. Here, the nozzle base portion  14 R forms the end portion of the front defroster nozzle  10 R on the inside of the vehicle width direction and extends in the vehicle up and down direction so that the lower end portion (one end portion of the front defroster nozzle  10 R) is connected to an upper portion of the air conditioning device  11 . 
     The nozzle body portion  16 R extends from the upper end portion of the nozzle base portion  14 R outward in the vehicle width direction and the nozzle body portion  16 R extends to the end portion of the front defroster nozzle  10 R on the outside in the vehicle width direction. Further, as shown in  FIG. 4 , a curved portion  20 R is formed at a position offset outward in the vehicle width direction in relation to the center portion of the nozzle body portion  16 R in the vehicle width direction and the outside of the nozzle body portion  16 R in the vehicle width direction is curved toward the vehicle front side by the curved portion  20 R in top view. 
     Here, in the embodiment, a head-up display device  22  is disposed inside an instrument panel  38  (see  FIG. 1 ) to be located at the right side of the vehicle. The head-up display device  22  is a device that displays an image within the field of view of a driver by projecting an image onto a windshield or a combiner (reflection plate). Then, a portion on the inside of the nozzle body portion  16 R in relation to the curved portion  20 R in the vehicle width direction becomes a width direction extension portion  24  in which a portion on the vehicle rear side of the head-up display device  22  extends in the vehicle width direction along the head-up display device  22  in top view. Further, a portion on the outside of the nozzle body portion  16 R in relation to the curved portion  20 R in the vehicle width direction becomes a front and rear direction extension portion  26  in which a portion on the outside of the head-up display device  22  in the vehicle width direction extends in the vehicle front and rear direction. That is, the nozzle body portion  16 R (the front defroster nozzle  10 ) is disposed to go around the head-up display device  22  from the vehicle rear side to the outside of the vehicle width direction in top view. Then, the nozzle tip portion  18 R extends and protrudes from the tip portion (the front end portion) of the nozzle body portion  16 R toward the upper side of the vehicle. 
     As shown in  FIG. 1 , the nozzle tip portion  18 R extends in the vehicle up and down direction and the upper end portion of the nozzle tip portion  18 R (the other end portion of the front defroster nozzle  10 R) is disposed inside a front pillar  30 . Specifically, the vehicle interior side of the front pillar  30  is formed by a pillar garnish  32  and the upper end portion of the nozzle tip portion  18 R is disposed in a space between the pillar garnish  32  and a pillar body portion having a closed cross-section, which is not shown in the drawings. Then, the upper end portion of the nozzle tip portion  18 R is provided with a front side air outlet  40 . 
     The front side air outlet  40  opens toward a windshield glass  34  in a direction along the pillar garnish  32  being a longitudinal direction (see  FIG. 3 ). Further, the lower side of the front side air outlet  40  is curved so as to be convex toward the vehicle rear side corresponding to the shape of the pillar garnish  32 . For this reason, the lower portion of the front side air outlet  40  is formed so as to face the upper side of the vehicle with respect to the upper portion thereof. The windshield glass  34  is a transparent plate member that is located at the front end portion of the instrument panel  38  and extends in the vehicle width direction and the vehicle up and down direction, and both end portions of the windshield glass  34  in the vehicle width direction are supported by the front pillar  30 . 
     A plurality of ribs  42  is formed in the vicinity of the front side air outlet  40  of the nozzle tip portion  18 R and four ribs  42 A,  42 B,  42 C,  42 D are formed as an example in the embodiment. Further, each of the four ribs  42 A,  42 B,  42 C,  42 D extends from an opening edge of the front side air outlet  40  toward the inside of the nozzle tip portion  18 R in the vehicle up and down direction being a plate thickness direction. Then, these ribs  42 A,  42 B,  42 C,  42 D are used to reinforce the nozzle tip portion  18 R and serve as a rectifier for air blowing from the front side air outlet  40 . 
     The rib  42 A is located at the uppermost side of the vehicle among the plurality of ribs  42  and is provided to guide air (air current) flowing from the air conditioning device  11  through the front defroster nozzle  10  and blowing from the front side air outlet  40  toward the upper side of the windshield glass  34 . For this reason, air flowing to the upper portion of the nozzle tip portion  18  blows from a space between the rib  42 A and the upper edge  40 A of the front side air outlet  40  toward the upper side of the windshield glass  34 . 
     Meanwhile, the rib  42 D is located at the lowermost side among the plurality of ribs  42  and is provided to guide air (air current) flowing from the air conditioning device  11  through the front defroster nozzle  10  and blowing from the front side air outlet  40  toward a lower portion  34 A of the windshield glass  34 . For this reason, air flowing toward the lower portion of the nozzle tip portion  18  blows from a space between the rib  42 D and a lower edge  40 B of the front side air outlet  40  toward the lower portion  34 A of the windshield glass  34 . That is, the rib  42 D corresponds to a “guide portion” of the disclosure. 
     The rib  42 B and the rib  42 C are provided between the rib  42 A and the rib  42 D. Then, air flowing to the center portion of the nozzle tip portion  18 R in the up and down direction blows to the center portion of the windshield glass  34  in the up and down direction from a space between the rib  42 A and the rib  42 B, a space between the rib  42 B and the rib  42 C, and a space between the rib  42 C and the rib  42 D of the front side air outlet  40 . 
     The side defroster nozzle  12 R is branched from the upstream side of the front side air outlet  40  of the front defroster nozzle  10 R and extends in the vehicle up and down direction. Further, the side defroster nozzle  12 R is located on the rear side of the nozzle tip portion  18 R of the front defroster nozzle  10 R and the lower end portion of the side defroster nozzle  12 R is connected to the front end portion of the nozzle body portion  16 R of the front defroster nozzle  10 R. Further, the upper end portion (the tip portion) of the side defroster nozzle  12 R is disposed inside the front pillar  30  and the upper end portion (the tip portion) thereof is provided with a side air outlet  50 . 
     The side air outlet  50  opens toward a front side glass  36  in a direction along the pillar garnish  32  being a longitudinal direction. Further, the side air outlet  50  is formed to be shorter than the front side air outlet  40  in the vehicle up and down direction and is curved so as to be convex toward the vehicle front side corresponding to the shape of the pillar garnish  32  when viewed from the vehicle width direction. For this reason, the upper portion of the side air outlet  50  is formed so as to face the lower side of the vehicle with respect to the lower portion thereof. Additionally, the front side glass  36  is a transparent plate member that is located at both end portions of the vehicle front part in the vehicle width direction and extends in the vehicle front and rear direction and the vehicle up and down direction. 
     As shown in  FIGS. 2 and 3 , the pillar garnish  32  includes a lateral wall portion  32 A, a front wall portion  32 B, and a rear wall portion  32 C and a cross-section when viewed from the upper side of the vehicle is formed in a substantially U-shape opened outward in the vehicle width direction. Here, the lateral wall portion  32 A faces the inside in the vehicle width direction and faces the lateral wall portion of the pillar garnish constituting the front pillar on the left side of the vehicle, which is not shown in the drawings. 
     The front wall portion  32 B extends from the front end portion of the lateral wall portion  32 A outward in the vehicle width direction and faces the windshield glass  34 , and the front wall portion  32 B is provided with a front opening portion  52 . The front opening portion  52  is formed at a position corresponding to the front side air outlet  40  of the nozzle tip portion  18  (the front defroster nozzle  10 ) and communicates with the front side air outlet  40 . For this reason, air blowing from the front side air outlet  40  blows toward the windshield glass  34  through the front opening portion  52 . 
     The rear wall portion  32 C extends from the rear end portion of the lateral wall portion  32 A outward in the vehicle width direction and faces the vehicle rear side and the rear wall portion  32 C is provided with a rear opening portion  54 . The rear opening portion  54  is formed at a position corresponding to the side air outlet  50  of the side defroster nozzle  12  and communicates with the side air outlet  50 . For this reason, air blowing from the side air outlet  50  blows toward the front side glass  36  through the rear opening portion  54 . 
     As shown in  FIGS. 4 and 5 , the left front defroster nozzle  10 L is located at the left side in relation to the center portion of the vehicle width direction and includes a nozzle base portion  14 L, a nozzle body portion  16 L, and a nozzle tip portion  18 L. Further, the front defroster nozzle  10 L of the embodiment is formed symmetrically with the right front defroster nozzle  10 R. That is, the nozzle base portion  14 L extends in the vehicle up and down direction and is connected to the upper portion of the air conditioning device  11  and the nozzle body portion  16 L extends from the upper end portion of the nozzle base portion  14 L outward in the vehicle width direction. 
     A curved portion  20 L is formed at a position offset outward in the vehicle width direction in relation to the center portion of the nozzle body portion  16 L in the vehicle width direction and the outside of the nozzle body portion  16 L in the vehicle width direction is curved toward the vehicle front side by the curved portion  20 L in top view. Then, the nozzle tip portion  18 L extends and protrudes from the front end portion of the nozzle body portion  16 L toward the upper side of the vehicle. The nozzle tip portion  18 L extends in the vehicle up and down direction and the upper end portion of the nozzle tip portion  18 L is disposed inside a front pillar (not shown) on the left side of the vehicle. Then, the upper end portion of the nozzle tip portion  18 L is provided with the front side air outlet  40  and the front side air outlet  40  opens toward the windshield glass  34  (see  FIG. 1 ) similarly to the right front defroster nozzle  10 R. 
     Similarly to the right side defroster nozzle  12 R, the side defroster nozzle  12 L is branched from the upstream side of the front side air outlet  40  of the front defroster nozzle  10 L. Further, the upper end portion of the side defroster nozzle  12 L is disposed inside a front pillar (not shown) on the left side of the vehicle and the upper end portion is provided with the side air outlet  50  opening toward the front side glass  36  (see  FIG. 1 ). 
     (Operations and Effects) Next, the operations and effects of the embodiment will be described. 
     In the embodiment, the pair of right and left front defroster nozzles  10  is provided and one end portion (the nozzle base portion  14 ) of the front defroster nozzle  10  is connected to the air conditioning device  11 . Further, as shown in  FIG. 1 , the other end portion of the front defroster nozzle  10  (the upper end portion of the nozzle tip portion  18 ) is disposed inside the front pillar  30  and the other end portion thereof is provided with the front side air outlet  40  opening toward the windshield glass  34 . Accordingly, air can blow from the front pillar  30  toward the windshield glass  34  through the front defroster nozzle  10  from the air conditioning device  11  and hence the frost of the windshield glass  34  can be removed (clarified). 
     The above-described effect will be described with reference to  FIG. 6 . As shown in  FIG. 6 , air blowing from the front side air outlet  40  of the front defroster nozzle  10 R toward the windshield glass  34  flows along the windshield glass  34  toward the inside of the vehicle width direction (the left side of the vehicle). Accordingly, the frost of the windshield glass  34  from the right half of the vehicle is removed. 
     Meanwhile, air blowing from the front side air outlet  40  of the front defroster nozzle  10 L toward the windshield glass  34  flows along the windshield glass  34  toward the inside of the vehicle width direction (the right side of the vehicle). Accordingly, the frost of the windshield glass  34  from the left half of the vehicle is removed. As a result, it is possible to remove the frost of the windshield glass  34  even when the air outlet of the front defroster nozzle is not disposed in the center portion of the vehicle width direction inside the instrument panel  38 . In this way, it is possible to save a space inside the instrument panel  38  to a degree that the front side air outlet  40  of the front defroster nozzle  10 L may not be provided inside the instrument panel  38 . 
     Further, the side defroster nozzle  12  is branched from the upstream side of the front side air outlet  40  in the pair of right and left front defroster nozzles  10  and the tip portion of the side defroster nozzle  12  is provided with the side air outlet  50 . In this way, by branching off the side defroster nozzle  12  from the front defroster nozzle  10 , a part of the front defroster nozzle  10  can be shared with the side defroster nozzle  12 . In this way, it is possible to save a space inside the instrument panel  38 . Particularly, in the embodiment, as shown in  FIG. 1 , the side defroster nozzle  12 R is branched at the nozzle tip portion  18 R being the tip portion of the front defroster nozzle  10 R. Accordingly, since it is possible to shorten the passage of the side defroster nozzle  12 R, it is possible to effectively save a space. 
     Further, as shown in  FIG. 6 , in the embodiment, since air blows from the front side air outlet  40  formed in the pair of right and left front defroster nozzles  10  toward the windshield glass  34 , air currents collide with each other in the center portion of the windshield glass  34  in the vehicle width direction. Then, the colliding air currents flow in the center portion in the vehicle width direction from the vehicle front side to the vehicle rear side. As a result, in a vehicle of a general layout in which a driver seat is disposed at one side of the vehicle width direction and an assistant seat is disposed at the other end side of the vehicle width direction, an air current flows between the driver seat and the assistant seat, then, it is possible to prevent the air current from carelessly blowing to the passenger sitting on the driver seat or the assistant seat. 
     Further, in the embodiment, as shown in  FIG. 1 , both of the front side air outlet  40  of the front defroster nozzle  10  and the side air outlet  50  of the side defroster nozzle  12  are disposed inside the front pillar  30 . In this way, since it is possible to integrate the front side air outlet  40  and the side air outlet  50  in the front pillar  30 , it is possible to improve the degree of freedom in design of the vehicle interior. In particular, in a configuration in which the air outlet of the front defroster nozzle is formed in the upper surface or the like in the center portion of the vehicle width direction inside the instrument panel  38 , it is necessary to form a step portion in the instrument panel  38  so that the air outlet does not enter the field of view of the passenger. That is, there is a restriction on the design of the instrument panel  38 . In contrast, in the embodiment, since the air outlet of the front defroster nozzle  10  can be removed from the instrument panel  38 , it is not necessary to form the step portion in the instrument panel  38 . In this way, it is possible to improve the degree of freedom in design of the vehicle interior. 
     Furthermore, in the embodiment, as shown in  FIG. 7 , air blowing from a space between the lower edge  40 B and the rib  42 D of the front side air outlet  40  is guided by the rib  42 D and blows toward the lower portion  34 A of the windshield glass  34 . Accordingly, in a vehicle that displays information on a region of the lower portion  34 A of the windshield glass  34  by the head-up display device  22 , the frost of the region used to display information by the head-up display device  22  can be effectively removed (clarified). 
     Meanwhile, air blowing from a space between the upper edge  40 A and the rib  42 A of the front side air outlet  40  is guided by the rib  42 A and blows toward the upper side of the windshield glass  34 . Similarly, air blowing from a space between the rib  42 A and the rib  42 B of the front side air outlet  40 , air blowing from a space between the rib  42 B and the rib  42 C, and air blowing from a space between the rib  42 C and the rib  42 D respectively blow to the center portion of the windshield glass  34  in the vehicle up and down direction. In this way, it is possible to effectively remove (clarify) the frost of the entire surface of the windshield glass  34 . 
     Further, in the embodiment, as shown in  FIGS. 2 and 3 , the front opening portion  52  is formed in the front wall portion  32 B of the pillar garnish  32  and air blows from the front side air outlet  40  through the front opening portion  52 . Accordingly, since the front side air outlet  40  (the front opening portion  52 ) is not easily viewed from the passenger, it is possible to improve the design of the front pillar  30 . 
     Further, in the embodiment, as shown in  FIG. 4 , the nozzle body portion  16 R of the right front defroster nozzle  10 R includes the width direction extension portion  24  and the front and rear direction extension portion  26 . Then, the front defroster nozzle  10 R is disposed to go around the head-up display device  22  from the vehicle rear side to the outside of the vehicle width direction in top view. Accordingly, it is possible to suppress the interference between the head-up display device  22  and the front defroster nozzle  10  even when the head-up display device  22  extends in the vehicle width direction. 
     The above-described effects will be described with reference to the comparison with the structure of the comparative example shown in  FIG. 8 . In the comparative example of  FIG. 8 , a right front defroster nozzle  100 R and a left front defroster nozzle  100 L are provided and the right front defroster nozzle  100 R is disposed to go around the head-up display device  22  from the inside of the vehicle width direction to the vehicle front side. 
     Specifically, the front defroster nozzle  100 R includes a nozzle base portion  102 R, a nozzle body portion  104 R, and a nozzle tip portion (not shown) and the front defroster nozzle  100 L includes a nozzle base portion  102 L, a nozzle body portion  104 L, and a nozzle tip portion (not shown). Here, the nozzle body portion  104 R includes a front and rear direction extension portion  106  which extends from the nozzle base portion  102 R toward the inside of the head-up display device  22  in the vehicle width direction along the head-up display device  22 . Further, a width direction extension portion  108  extends outward in the vehicle width direction from the front end portion of the front and rear direction extension portion  106  and the width direction extension portion  108  extends to the vehicle front side of the head-up display device  22 . 
     In the above-described structure of the comparative example, the front defroster nozzle  100 R is disposed to go around the head-up display device  22  from the inside of the vehicle width direction to the vehicle front side in top view. As a result, when the head-up display device  22  extends, there is a possibility that the head-up display device  22  may interfere with the width direction extension portion  108  or the front and rear direction extension portion  106  of the front defroster nozzle  100 R. 
     In contrast, in the structure of the embodiment, as shown in  FIG. 4 , the width direction extension portion  24  extends to the vehicle rear side of the head-up display device  22  along the head-up display device  22  and the front and rear direction extension portion  26  extends toward the outside of the head-up display device  22  in the vehicle width direction. That is, since the front defroster nozzle  10  is disposed to go around the head-up display device  22  from the vehicle rear side to the outside of the vehicle width direction as described above, it is possible to suppress the interference with the front defroster nozzle  10 R even when the head-up display device  22  extends in the vehicle width direction or the head-up display device  22  extends to the vehicle front side. 
     While the vehicle air conditioning duct structure according to the embodiment has been described, various modifications can be, of course, made without departing from the spirit of the disclosure. For example, in the embodiment, as shown in  FIG. 5 , the front defroster nozzles  10 L and  10 R are provided and air blows from the front side air outlets  40  provided in the nozzle tip portions  18 L and  18 R of the front defroster nozzles  10 L and  10 R respectively, but the disclosure is not limited thereto. That is, the left front defroster nozzle  10 L may not be provided. In this case, air blows only from the front side air outlet  40  of the right front defroster nozzle  10 R to the windshield glass  34 , but the frost of the entire surface of the windshield glass  34  may be removed by adjusting the shape of the front side air outlet  40  or the output of the air conditioning device  11 . 
     Further, in the embodiment, as shown in  FIG. 1 , both of the upper end portion of the nozzle tip portion  18 R and the upper end portion of the side defroster nozzle  12 R are disposed inside the front pillar  30 , but the disclosure is not limited thereto. For example, the side defroster nozzle  12 R may be disposed on the vehicle rear side of the pillar garnish  32  of the front pillar  30  and the side defroster nozzle  12 R may be disposed inside the upper end portion of the door trim of the side door. 
     Further, in the embodiment, the rib  42 D disposed in the vicinity of the lower portion of the front side air outlet  40  of the nozzle tip portion  18 R is formed as the guide portion, but the disclosure is not limited thereto. For example, a partition member that defines the inside of the nozzle tip portion  18 R into the front and rear parts may be provided instead of the rib  42 D and the partition member may be used as the guide portion. That is, the inner space of the nozzle tip portion  18 R may be defined by forming the partition member from the front side air outlet  40  to the root portion of the nozzle tip portion  18 R (the boundary portion with the nozzle body portion  16 R). 
     Furthermore, in the embodiment, as shown in  FIG. 4 , the front defroster nozzle  10 R is disposed to go around the head-up display device  22  from the vehicle rear side to the outside of the vehicle width direction in top view, but the disclosure is not limited thereto. For example, as in the structure of the comparative example shown in  FIG. 8 , the front defroster nozzle  10 R may be disposed to go around the head-up display device  22  from the inside of the vehicle width direction to the vehicle front side. Even in this case, by forming the front side air outlet opening toward the windshield glass in the front defroster nozzle and branching off the side defroster nozzle from the upstream side of the front side air outlet, it is possible to obtain a structure that saves a space inside the instrument panel.