JP2010125915A - Internal air suction duct and vehicular air-conditioner using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce leakage of noise from both upper and lower gaps of an instrument panel into a cabin in introducing internal air. <P>SOLUTION: Two suction ports 34, 35 are arranged in an internal air suction duct 31 connected to an internal air introduction port 15. The position of two suction ports 34, 35 is made with the height position same to that of a connection port 33 connected to the internal air introduction port 15, and the opening direction of two suction ports 34, 35 are made the right and left direction of a vehicle. Thus, because the opening direction of the suction port is the horizontal direction, the noise in introducing internal air is propagated from the suction port in the horizontal direction and is not propagated upward and downward directly from the suction port. Also, because two suction ports 34, 35 are in the same height with the internal air introduction port 15, leakage of the noise from both upper and lower gaps of the instrument panel into the cabin can be reduced when compared with the case in which the suction port is positioned on the upper side or the lower side of the internal air introduction port. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inside air suction duct that communicates with an upstream side of an inside air introduction port through which vehicle interior air is introduced, and a vehicle air conditioner using the same.

  Patent Documents 1 to 3 disclose inside air suction ducts connected to inside air introduction ports of a vehicle air conditioner. The inside air suction duct forms an air passage through which vehicle interior air flows from the suction port toward the inside air introduction port.

In the inside air suction ducts described in Patent Documents 1 and 2, the inside air suction duct has a suction port located below the inside air introduction port, and the suction port opens downward. On the other hand, in the inside air suction duct described in Patent Document 3, the inside air suction duct is opened with the suction port facing upward.
Japanese Patent Laying-Open No. 2005-289285 (see paragraphs 0025, 3 and 4) Japanese Patent Laying-Open No. 2006-88863 (see paragraph 0017, FIG. 1) Japanese Unexamined Patent Publication No. 2000-168334 (see reference numeral 9 in FIG. 1)

  When the inside air is introduced from the inside air introduction port, the inside air introduction port communicates with the vehicle interior, so that there is a problem that noise generated by the operation of the blower leaks into the vehicle interior. The inside air suction ducts described in Patent Documents 1 to 3 attempt to solve this problem, but as described below, the problem has not been sufficiently solved.

  Specifically, when the inside air intake duct is not provided at the inside air introduction port and the inside air introduction port faces upward of the vehicle body, noise emitted from the inside air introduction port propagates upward, Noise leaks into the passenger compartment through the gap between the upper part of the ment panel and the vehicle body.

  On the other hand, according to the inside air suction ducts described in Patent Documents 1 and 2, since the suction port is open downward, the amount of propagation of noise upward can be reduced, and the upper side of the instrument panel. The problem that noise leaks into the vehicle interior from the gap between the portion and the vehicle body can be solved.

  However, if the position of the suction port of the inside air suction duct is below the inside air introduction port, the suction port is located near the occupant's feet, making it easier for noise to propagate to the feet, and opening the suction port. If the direction is downward, the noise propagates directly from the intake port of the inside air suction duct toward the lower side of the vehicle body. As a result, the noise leaks into the vehicle compartment from the gap below the instrument panel at the passenger's feet.

  On the other hand, in the inside air suction duct described in Patent Document 3, since the opening direction of the suction port of the inside air suction duct is upward, noise propagates directly from the suction port of the inside air suction duct toward the upper side of the vehicle body, The problem of noise leaking into the passenger compartment through the gap above the instrument panel has not been solved.

  The present invention has been made in view of the above points, and it is an object of the present invention to reduce leakage of noise into the vehicle interior from the gaps on both the upper and lower sides of the instrument panel when introducing the inside air.

  In order to achieve the above object, according to the first aspect of the present invention, the inside air suction duct communicates with the inside air introduction port (15) that opens upward, and the suction port (34) that sucks in the vehicle interior air. , 35, 43, 44), and the suction port (34, 35, 43, 44) is open at the same height as the inside air introduction port and facing in the horizontal direction. It is a feature.

  Here, “the position where the suction port is the same height as the inside air introduction port” is not limited to the positional relationship in which the suction port and the inside air introduction port completely overlap in the height direction, but the suction port in the height direction. This also includes a positional relationship in which the inside air introduction port partially overlaps.

  In the inside air suction duct according to the present invention, since the opening direction of the suction port is horizontal, noise during the introduction of the inside air propagates in the horizontal direction from the suction port, and does not propagate directly upward and downward from the suction port.

  Furthermore, in the inside air suction duct according to the present invention, since the position of the suction port is the same height as the inside air introduction port, the suction port is located on the instrument panel as compared with the case where the suction port is located above the inside air introduction port. The suction port is separated from the upper gap, and the suction port is separated from the lower gap of the instrument panel as compared with the case where the position of the suction port is lower than the inside air introduction port.

  Therefore, according to the inside air suction duct of the present invention, compared to the case where the position of the suction port is above the inside air introduction port and the opening direction of the suction port is upward, it is from the gap above the instrument panel. Compared to the case where the noise leakage into the passenger compartment is reduced and the suction port is located below the inside air inlet and the opening direction of the suction port is downward, the clearance from the lower side of the instrument panel Noise leakage into the passenger compartment can be reduced.

  Further, in the invention described in claim 2, the inside air introduction port (15) opens upward and in the horizontal direction, and the intake ports (34, 35) of the inside air suction duct are introduced into the inside air in the horizontal direction. The inside air suction duct is opened in a direction intersecting with the opening direction of the mouth (15), and the inside air suction duct has an air passage bent in the middle from the suction port (34, 35) to the inside air introduction port (15). It is characterized by the shape to be formed.

  In the invention according to claim 2, the suction port (34, 35) opens in the horizontal direction in a direction intersecting the opening direction of the inside air introduction port (15), and the suction port (34, 35). Since a passage that bends in the middle from the inside air introduction port (15) is formed, the noise released from the inside air introduction port during introduction of the inside air is propagated through the inside air suction duct. It changes direction by colliding with the inner wall of and is discharged from the suction port. Therefore, according to this, before the noise is released from the suction port, the noise is attenuated by the collision of the noise with the wall of the inside air suction duct.

  In the invention described in claim 3, the inside air introduction port (15) opens upward and toward the rear of the vehicle, and the intake ports (34, 35) of the inside air suction duct face the vehicle left-right direction. It is characterized by being open.

  According to the third aspect of the present invention, the opening direction of the suction port is not the vehicle rear but the vehicle left-right direction. Therefore, even if the inside air inlet opens toward the vehicle rear, the vehicle rear of the instrument panel Propagation of sound into the passenger compartment located at the vehicle can be reduced.

  As a specific configuration of the invention described in claim 3, for example, the configuration described in claims 4 and 5 can be adopted.

  In the invention according to claim 4, the vehicle has a shape extending from the inside air introduction port (15) toward the rear of the vehicle, and the side surface on the vehicle rear side facing the inside air introduction port (15) at the distal end of the extension destination ( 39), a side surface (31a) on the left side of the vehicle, and a side surface (31b) on the right side of the vehicle, and the suction port (34, 35) has a side surface (31a) on the left side of the vehicle and a side surface (31b) on the right side of the vehicle. ) And the suction port (34) provided on the left side surface (31a) of the vehicle opens toward the left side of the vehicle and is provided on the side surface (31b) of the right side of the vehicle. The suction port (35) thus formed is characterized by opening toward the right side of the vehicle.

  According to this, since the noise released from the inside air introduction port when the inside air is introduced collides with the side surface (39) on the rear side of the vehicle and is attenuated before being emitted from the suction port, the noise is propagated into the vehicle interior. Can be reduced.

  In the invention according to claim 5, a partition wall (40) extending from the side surface (39) on the vehicle rear side toward the inside air introduction port (15) is further provided between the two suction ports (34, 35). It is characterized by being.

  Here, in the configuration according to claim 4, in the case where no partition wall is provided, the direction of the air sucked from the suction ports on both sides is not parallel, so the air flow on the side away from the inside air inlet of the merging portion Itching occurs and this causes sound.

  On the other hand, according to the invention described in claim 5, by providing the partition wall, the inside air sucked from the two suction ports can be merged in parallel to each other, and generation of sound at the time of merging is prevented. it can.

  In addition, the partition wall (40) is the opening direction of the two suction ports from the viewpoint of causing the inside air sucked from the two suction ports to merge in parallel with each other and causing the noise propagating through the duct to collide with the inner wall of the duct. It is preferable that it is flat plate shape orthogonal to.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
First, the overall configuration of a vehicle air conditioner including the inside air suction duct of the present invention will be described. In FIG. 1, the schematic diagram of the internal structure of the indoor air-conditioning unit of the vehicle air conditioner in this embodiment is shown.

  The indoor air conditioning unit 1 shown in FIG. 1 is roughly configured by a blower unit 10 and an air conditioning main unit 20. The blower unit 10 is disposed on the passenger seat side inside the instrument panel of the vehicle, and the air conditioning main unit 20 is disposed at a substantially central portion in the vehicle left-right direction inside the instrument panel.

  The blower unit 10 includes a blower 11, a blower case 12 that accommodates the blower 11, an inside / outside air switching door 13 for switching and introducing inside air (vehicle compartment air) and outside air (vehicle compartment outside air) into the blower case 12, and the inside and outside The air switching box 14 is provided, and the air introduced from the inside / outside air switching box 14 is introduced into the air conditioning main unit 20 by the blower 11.

  The inside / outside air switching box 14 has an inside air introduction port 15 and an outside air introduction port 16, and the inside air introduction port 15 is connected to the inside air suction duct 15 although not shown in FIG. Details of the inside air suction duct will be described later.

  The air conditioning body unit 20 adjusts the temperature of the blown air from the blower unit 10 and blows it out into the vehicle interior. The air conditioning body unit 20 is used as a cooling heat exchanger that cools the blown air to a resin air conditioning case 21 that forms an air passage. The evaporator 22, the hot water heater core 23 as a heating heat exchanger for heating the blown air, the air mix door 24 for mixing the cooled blown air and the heated blown air, and the mode for switching the blowing mode The switching doors 25, 26, 27 and the like are accommodated.

  The air conditioning case 21 is provided with a defroster opening 28, a face opening 29, and a foot opening 30 in order to blow out the conditioned air whose temperature is adjusted by the evaporator 22 and the heater core 23 from each outlet of the instrument panel. ing. Although not shown, the vehicle air conditioner includes a compressor, a condenser, and the like constituting the refrigeration cycle in addition to the evaporator 22.

  Next, the inside air suction duct will be described. FIG. 2 shows a front view of the blower unit 10 in a vehicle-mounted state, and FIG. 3 shows a top view of the blower unit 10 in FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along line VV in FIG. The directions such as up and down in FIGS. 2 to 5 indicate the directions when the vehicle is mounted, and the same applies to other drawings.

  As shown in FIGS. 2 and 3, the blower unit 10 is disposed on the vehicle front side of the instrument panel 2, for example, on the vehicle front side of the glove box.

  The inside air introduction port 15 is provided on the vehicle rear side of the inside / outside air switching box 14, and the outside air introduction port 16 is provided on the vehicle front side of the inside / outside air switching box 14. The inside air inlet 15 opens toward the rear and upward of the vehicle. An inside air suction duct 31 is connected to the air flow upstream side of the inside air introduction port 15, and an outside air suction duct 32 is connected to the air flow upstream side of the outside air introduction port 16.

  The inside air suction duct 31 forms therein an air passage through which the inside air flows toward the inside air introduction port 15. The inside air suction duct 31 is configured as a separate part from the inside / outside air switching box 14, and is made of, for example, a resin material such as polypropylene (PP).

  2 to 5, the inside air suction duct 31 extends horizontally from the connection port 33 connected to the inside air introduction port 15 toward the rear of the vehicle and branches from the rear side of the vehicle toward the left and right direction of the vehicle. It is a T shape. As shown in FIGS. 3 and 4, a first suction port 34 and a second suction port 35 for sucking in the inside air are provided at the ends of the branched portions 37 and 38.

  Therefore, as shown in FIG. 4, the inside air suction duct 31 includes a first straight portion 36 that extends linearly from the connection port 33 to the rear of the vehicle, and a second straight line that extends linearly toward the left on the vehicle rear side. Part 37 and a third straight part 38 extending straight in the right direction on the vehicle rear side.

  More specifically, the inside air suction duct 31 includes a rectangular parallelepiped portion that extends linearly from the connection port 33 to the rear of the vehicle, and at least as shown in FIGS. Side surface 31b, upper surface 31c, lower surface 31d, and side surface 39 on the vehicle rear side.

  The side surfaces 31a and 31b on the left side and the right side of the vehicle are parallel to the vehicle longitudinal and vertical directions, and the upper surface 31c and the lower surface 31d are parallel to the vehicle longitudinal and lateral directions. The side surface 39 on the vehicle rear side is a side surface located at the end opposite to the connection port 33, is parallel to the vehicle left-right direction and the vertical direction, and faces the inside air introduction port 15 in the vehicle front-rear direction.

  And the 1st inlet 34 is provided with respect to the side 31a of the vehicle left side, and the 2nd inlet 35 is provided with respect to the side 31b of the vehicle right side.

  The connection port 33 of the inside-air suction duct 31 is open toward the vehicle front diagonally downward direction. On the other hand, the first suction port 34 opens toward the left side of the vehicle, and the second suction port 35 opens toward the right side of the vehicle. Accordingly, the first and second suction ports 34 and 35 open in the horizontal direction in a direction orthogonal to the opening direction of the connection port 33 (front of the vehicle) and the opening direction of the inside air introduction port 15 (rear of the vehicle). is doing.

  The direction in which the suction port is open means a direction perpendicular to the surface formed by the tip of the suction port. 3 and 4, since the surfaces formed by the tips of the first and second suction ports 34 and 35 are parallel to the vehicle longitudinal direction, the opening direction of the first and second suction ports 34 and 35 is the vehicle longitudinal direction. The vehicle is perpendicular to the left-right direction.

  As shown in FIG. 2, the width 34 a in the vertical direction of the first suction port 34 is the same as the width in the vertical direction of the connection port 33 and the width in the vertical direction of the inside air introduction port 15. Similarly, the width of the second suction port 3 in the vertical direction is the same as the width of the inside air introduction port 15 in the vertical direction. Since the inside air suction duct 31 extends horizontally from the connection port 33 to the first and second suction ports 34 and 35, the first and second suction ports 34 and 35 are connected to the connection port 33 and the inside air introduction port. 15 and the same height.

  As shown in FIGS. 3, 4, and 5, a partition wall 40 is provided in the center of the left-right direction of the vehicle inside the inside air suction duct 31. The partition wall 40 extends from the side surface 39 on the vehicle rear side to the inside air inlet side. The partition wall 40 is located between the first suction port 34 and the second suction port 35 facing each other, and has a flat plate shape having a flat surface 40a parallel to the vehicle front-rear direction. The partition wall 40 forms an air passage on the first suction port 34 side and an air passage on the second suction port 35 side.

  Next, the internal air flow and the noise propagation direction when introducing the internal air will be described.

  When the inside air is introduced, the inside / outside air switching door 13 causes the outside air introduction port 16 to be closed while the inside air introduction port 15 is open, and the blower 11 operates to actuate the first and second suction of the inside air suction duct 31. Shyness is sucked from the mouths 34 and 35.

  Inside the inside air suction duct 31, as shown in FIG. 4, after the inside air 41 sucked from the first and second suction ports 34 and 35 flows in the vehicle left-right direction (see FIG. 3), it is directed at a right angle. Is changed to flow toward the front of the vehicle (see FIG. 5) to reach the inside air inlet 15. Thereafter, the inside air is sucked into the inside / outside air switching box 14 from the inside air introduction port 15 and flows through the blower case 12 and inside the air conditioning main unit 20.

  At this time, the noise generated by the operation of the blower 11 or the like propagates through the inside of the inside air suction duct 31 in a direction opposite to the inside air flow direction. That is, as shown in FIG. 4, the noise 42 emitted from the inside air introduction port 15 propagates from the connection port 33 of the inside air suction duct 31 toward the rear of the vehicle (see FIG. 5), and then the side surface on the rear side of the vehicle. It collides with 39 and changes its direction to propagate toward the first and second suction ports 34 and 35. Then, noise is released from the first suction port 34 in the left direction, and noise is released from the second suction port 35 in the right direction (see FIG. 3).

  Thus, in this embodiment, since the opening direction of the 1st, 2nd suction inlets 34 and 35 is a vehicle left-right direction, the noise at the time of internal air introduction | transduction from the 1st, 2nd suction inlets 34 and 35 to a vehicle left-right direction. Propagates and does not propagate directly upward and downward from the first and second suction ports 34 and 35.

  Further, since the positions of the first and second suction ports 34 and 35 are the same height as the inside air introduction port 15, compared with the case where the positions of the first and second suction ports 34 and 35 are above the inside air introduction port 15. When the first and second suction ports 34 and 35 are separated from the upper gap of the instrument panel 2 and the positions of the first and second suction ports 34 and 35 are lower than the inside air introduction port 15. The first and second suction ports 34 and 35 are separated from the lower gap of the instrument panel 2 as compared with the first and second suction ports 34 and 35.

  Therefore, according to the inside air suction duct 31 of the present embodiment, the upper side of the instrument panel 2 is compared with the case where the position of the suction port is above the inside air introduction port 15 and the opening direction of the suction port is upward. As compared with the case where the noise leakage from the gap to the vehicle interior can be reduced and the position of the suction port is below the inside air introduction port 15 and the opening direction of the suction port is downward, the instrument panel 2 Noise leakage from the lower gap into the passenger compartment can be reduced.

  Further, according to the present embodiment, the opening direction of the first and second suction ports 34, 35 of the inside air suction duct 31 is the vehicle left-right direction, and is orthogonal to the opening direction of the connection port 33. The noise propagating through the inside air suction duct 31 can be attenuated by colliding with the side surface 39 on the vehicle rear side.

  Furthermore, according to this embodiment, the noise emitted from the first and second suction ports 34 and 35 of the inside air suction duct 31 is present in the vehicle left-right direction of the first and second suction ports 34 and 35. It collides with the side wall of the main body and attenuates.

  From the above, according to the present embodiment, it is possible to reduce the leakage of noise into the vehicle compartment when the inside air is introduced.

(Second Embodiment)
FIG. 6 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 6 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  Although the partition wall 40 of the first embodiment has a flat plate shape having a flat surface 40a, the partition wall 40 of the present embodiment has a shape having a curved surface 40b. The curved surface 40b is bent from the front side of the vehicle toward the left side or the right side.

  Also in the present embodiment, as in the first embodiment, noise during introduction of inside air propagates in the vehicle left-right direction from the first and second suction ports 34 and 35, and from the first and second suction ports 34 and 35. Since it does not propagate directly upward and downward, it is possible to reduce noise leakage into the vehicle compartment from the gaps on both the upper and lower sides of the instrument panel when the inside air is introduced.

  However, in this embodiment, as shown in FIG. 6, since noise propagates along the curved surface 40b toward the first and second suction ports 34 and 35 in the inside air suction duct 34, the first embodiment. Among these effects, the noise attenuation effect due to collision with the side wall 39 of the inside air suction duct 31 is reduced. Therefore, from the viewpoint of enhancing the noise attenuation effect due to collision with the side wall 39 of the inside air suction duct 31, the first embodiment in which the partition wall 40 has a flat plate shape is preferable to the present embodiment.

(Third embodiment)
FIG. 7 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 7 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  The inside air suction duct 31 of the present embodiment has a structure in which the partition wall 40 of the inside air suction duct 31 of the first embodiment is omitted. Also in the present embodiment, as in the first embodiment, noise during introduction of inside air propagates in the vehicle left-right direction from the first and second suction ports 34 and 35, and from the first and second suction ports 34 and 35. Since it does not propagate directly upward and downward, it is possible to reduce noise leakage into the vehicle compartment from the gaps on both the upper and lower sides of the instrument panel when the inside air is introduced.

  However, in the case of this embodiment, when the inside air sucked from the first and second suction ports 34 and 35 merges, the flow directions of both faces each other, and the flow directions of the two are not parallel. The noise by the confluence | merging of the inside air suck | inhaled from the 1st, 2nd suction inlets 34 and 35 will arise. This noise is generated due to the stagnation of the air flow in the portion 43 away from the inside air introduction port among the joining locations of the inside air sucked from the first and second suction ports 34 and 35.

  On the other hand, in the first and second embodiments, the partition wall 40 is provided, and the inside air sucked from the first and second suction ports 34 and 35 can be merged in parallel with each other. Moreover, generation | occurrence | production of the noise by the confluence | merging of the internal air from the 2nd suction inlets 34 and 35 can be prevented. Therefore, the first and second embodiments are preferable to the present embodiment.

(Fourth embodiment)
FIG. 8 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 8 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  The inside air suction duct 31 of the present embodiment has a second straight portion 37 that extends linearly toward the left side on the vehicle rear side and a right side on the vehicle rear side with respect to the inside air suction duct 31 of the first embodiment. This is a shape in which the third straight portion 38 extending linearly in the direction is omitted.

  That is, the inside air suction duct 31 of the present embodiment has a substantially rectangular parallelepiped shape, and includes a side surface 31a on the left side of the vehicle, a side surface 31b on the right side of the vehicle, an upper surface 31c (see FIG. 5), a lower surface 31d (see FIG. 5), And a side surface 39 on the vehicle rear side. And it is the shape which provided the connection port 33 in the vehicle front side of the substantially rectangular parallelepiped, provided the 1st suction port 34 in the side surface 31a of the vehicle left side, and provided the 2nd suction port 35 in the side surface 31b of the vehicle right side.

  Also in the present embodiment, as in the first embodiment, noise during introduction of inside air propagates in the vehicle left-right direction from the first and second suction ports 34 and 35, and from the first and second suction ports 34 and 35. Since it does not propagate directly upward and downward, it is possible to reduce noise leakage into the vehicle compartment from the gaps on both the upper and lower sides of the instrument panel when the inside air is introduced.

(Fifth embodiment)
FIG. 9 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 9 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  The inside air suction duct 31 of the present embodiment changes the opening direction of the first and second suction ports 34 and 35 with respect to the inside air suction duct 31 of the first embodiment.

  Specifically, as shown in FIG. 9, the direction perpendicular to the front end surface of the first suction port 34 on the left side of the vehicle is an oblique left direction with respect to the front, so the first suction port 34 is directed toward the front of the vehicle. Open diagonally to the left. On the other hand, since the direction perpendicular to the front end surface of the second suction port 35 on the right side of the vehicle is diagonally right with respect to the front, the second suction port 35 opens diagonally right with respect to the front of the vehicle. .

  As described above, the opening direction of the first and second suction ports 34 and 35 may be inclined with respect to the extending direction of the straight portions 37 and 38 (the vehicle left-right direction). In the present embodiment, the direction is oblique to the front, but the direction may be oblique to the rear.

  In the present embodiment, since the first and second suction ports 34 and 35 are both open in the horizontal direction, noise during introduction of the inside air is horizontal from the first and second suction ports 34 and 35. The vehicle interior from the gaps on both the upper and lower sides of the instrument panel at the time of introducing the inside air is not propagated in the upward and downward directions directly from the first and second suction ports 34 and 35. Noise leakage can be reduced.

  Also in this embodiment, the first and second suction ports 34 and 35 are both open in the horizontal direction so as to cross the vehicle rear, which is the opening direction of the inside air introduction port 15. Therefore, when the inside air is introduced, the noise emitted from the inside air introduction port changes its direction by colliding with the side surface 39 on the rear side of the vehicle when propagating through the inside air suction duct, and the first and second suction ports 34 are changed. , 35. Therefore, the present embodiment also provides an effect that the noise is attenuated when the noise collides with the side surface 39 on the vehicle rear side.

(Sixth embodiment)
FIG. 10 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 10 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  The inside air suction duct 31 of the present embodiment also changes the opening direction of the first and second suction ports 34 and 35 with respect to the inside air suction duct 31 of the first embodiment.

  Specifically, as shown in FIG. 10, the first and second suction ports 34 and 35 are opened toward the front of the vehicle, which is the opposite direction to the opening direction of the inside air introduction port 15. The first and second suction ports 34 and 35 are respectively provided on the vehicle front side of a second straight portion 37 that extends linearly toward the left and a third straight portion 38 that extends straight toward the right. It is provided on the side.

  For this reason, when the inside air is introduced, the inside air 41 sucked from the first and second suction ports 34 and 35 makes a U-turn inside the inside air suction duct 31 toward the connection port 33 of the inside air introduction port 15. Flowing. On the other hand, the noise 42 when the inside air is introduced flows through the inside air suction duct 31 in the direction opposite to the inside air 41 and is released from the first and second suction ports 34 and 35 toward the front of the vehicle.

  Also in the present embodiment, as in the fifth embodiment, noise during introduction of inside air propagates in the horizontal direction from the first and second suction ports 34 and 35, and directly from the first and second suction ports 34 and 35. Therefore, it is possible to reduce noise leakage into the vehicle compartment from the gaps on both the upper and lower sides of the instrument panel when the inside air is introduced.

  In the present embodiment, the first and second suction ports 34 and 35 are both open in the opposite direction with respect to the vehicle rear, which is the opening direction of the inside air introduction port 15. When the noise emitted from the inside air inlet 15 sometimes propagates through the inside air suction duct 31, it changes its direction by hitting at least the side surface 39 on the vehicle rear side, and the first and second inlets 34, 35 is released. Therefore, the present embodiment also provides an effect that the noise is attenuated when the noise collides with the side surface 39 on the vehicle rear side.

(Seventh embodiment)
FIG. 11 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 11 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  As shown in FIG. 11, the inside air suction duct 31 of the present embodiment has one suction port 43, and this suction port 43, as with the inside air introduction port 15, is located behind the vehicle in the horizontal direction. It is open facing.

  Also in the present embodiment, as in the fifth embodiment, noise during introduction of inside air propagates in the horizontal direction from the first and second suction ports 34 and 35, and directly from the first and second suction ports 34 and 35. Therefore, it is possible to reduce noise leakage into the vehicle compartment from the gaps on both the upper and lower sides of the instrument panel when the inside air is introduced.

  In each of the above-described embodiments, the inside air suction duct 31 forms an air passage that bends in the middle from the suction port 43 to the connection port 33, so that the inside air 41 and the noise 42 are generated inside the inside air suction duct 31. However, in this embodiment, since the inside air suction duct 31 forms a linear air passage from the suction port 43 to the connection port 33, the inside air 41 and the noise 42 are sucked into the inside air. The inside of the duct 31 flows linearly.

  For this reason, when the noise 42 propagates while bending the inside of the inside air suction duct 31 in the middle, it collides with the inner wall of the inside air suction duct 31 to obtain the effect that the noise 42 is attenuated. The embodiment is preferred.

(Eighth embodiment)
FIG. 12 shows a front view of the blower unit 10 in the vehicle mounted state in the present embodiment, and FIG. 13 shows a top view of the blower unit 10 in FIG. FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 12-14, the same code | symbol as FIGS. 2-4 is attached | subjected to the component same as FIGS.

  The inside air suction duct 31 of the present embodiment has a shape in which the first straight portion 36 that linearly extends from the connection port 33 to the rear of the vehicle is omitted from the inside air suction duct 31 of the first embodiment shown in FIG. It is.

  That is, as shown in FIGS. 12 to 14, the inside air suction duct 31 extends horizontally from the connection port 33 connected to the inside air introduction port 15 in the vehicle left-right direction, and faces the vehicle left-right direction at the extended tip. A first suction port 34 and a second suction port 35 are provided.

  Also in the present embodiment, since the first suction port 34 and the second suction port 35 are opened in the left-right direction of the vehicle, noise during the introduction of the inside air from the first and second suction ports 34, 35 to the left and right sides of the vehicle. Direction, that is, in the horizontal direction and does not propagate in the upward and downward directions directly from the first and second suction ports 34 and 35, so that both the upper and lower sides of the instrument panel at the time of introducing the inside air Noise leakage from the gap into the vehicle interior can be reduced.

  In addition, the extending | stretching direction from the connection port 33 of the duct 31 for inside air suction is not restricted to the vehicle left-right direction, and may be a direction oblique to the left-right direction.

(Ninth embodiment)
FIG. 15 shows a cross-sectional view of the inside air suction duct 31 of the present embodiment. 15 corresponds to FIG. 4, and the same components as those in FIG. 4 are denoted by the same reference numerals as those in FIG.

  The inside air suction duct 31 of the present embodiment is obtained by adding a third suction port 44 to the inside air suction duct 31 of the first embodiment shown in FIG. The third suction port 44 is provided on the side wall 39 facing the inside air introduction port 15 and opens toward the rear of the vehicle. Thus, you may provide three suction inlets opened in the horizontal direction.

  Also in the present embodiment, since the first, second, and third suction ports 34, 35, and 44 are all open in the horizontal direction, the noise during the introduction of the inside air is the first, second, Since it propagates in the horizontal direction from the third suction ports 34, 35, 44 and does not propagate in the upward and downward directions directly from the first, second, third suction ports 34, 35, 44, It is possible to reduce noise leakage into the passenger compartment from the gap between the upper and lower sides of the instrument panel.

(Other embodiments)
(1) In the above-described embodiments, the positions of the upper and lower ends of the first and second suction ports 34 and 35 coincide with the positions of the upper and lower ends of the inside air introduction port 15 in the vehicle vertical direction (height direction). However, the first and second suction ports 34 and 35 and the inside air introduction port 15 are completely overlapped, but the relationship may not be completely overlapped.

  If the first and second suction ports 34 and 35 and the inside air introduction port 15 are in a positional relationship that partially overlaps in the vehicle vertical direction, for example, the first and second suction ports 34 and 35 are the inside air introduction port 15. May be slightly shifted upward or downward. Even in such a case, compared with the case where the position of the suction port is above the inside air introduction port, the suction port is separated from the gap above the instrument panel, and the position of the suction port is the inside air introduction port. This is because the suction port is separated from the lower gap of the instrument panel as compared with the lower case.

  (2) In 1st Embodiment, the opening direction (vehicle left-right direction) of the 1st, 2nd suction inlets 34 and 35 is a direction orthogonal to the opening direction (vehicle rear) of the internal air introduction port 15 in a horizontal direction. Yes, in the first embodiment, the inside air suction duct 31 has a shape that linearly extends from the connection port 33 and then bends at right angles to form a passage leading to the suction ports 34 and 35. The opening direction of the first and second suction ports 34 and 35 is defined as a direction that intersects the opening direction of the inside air introduction port 15 in the horizontal direction, and the shape of the inside air suction duct 31 extends linearly from the connection port 33. Then, it is good also as a shape which forms the channel | path which bends at angles other than a right angle and reaches the suction inlets 34 and 35 inside.

  (3) In the first to sixth embodiments, the two suction ports 34 and 35 are provided. However, one of the two suction ports 34 and 35 may be omitted, and one suction port may be provided. Further, in the ninth embodiment, the number of the suction ports of the inside air suction duct 31 is three, but the number of the suction ports of the inside air suction duct 31 may be four or more.

  (4) In each of the embodiments described above, the inside air introduction port 15 is provided on the vehicle rear side of the inside / outside air switching box 14, and the outside air introduction port 16 is provided on the vehicle front side of the inside / outside air switching box 14. The positions of the inlet 15 and the outside air inlet 16 may be interchanged.

  In this case, the inside air introduction opening opens toward the front and the top of the vehicle, and the shape of the inside air suction duct of each of the above embodiments is the position of the connection port 33 with respect to the inside air suction duct 31 of each of the above embodiments. It becomes the shape which makes line symmetry in the vehicle front-back direction on the basis of.

It is a schematic diagram which shows the internal structure of the indoor air-conditioning unit of the vehicle air conditioner in this embodiment. It is a front view in the vehicle mounting state of the air blower unit 10 in FIG. It is a top view of the air blower unit 10 in FIG. It is the IV-IV sectional view taken on the line in FIG. It is the VV sectional view taken on the line in FIG. It is a cross-sectional view of the inside air suction duct 31 of the second embodiment. It is a cross-sectional view of the inside air suction duct 31 of the third embodiment. It is a cross-sectional view of the inside air suction duct 31 of the fourth embodiment. It is a cross-sectional view of the inside air suction duct 31 of the fifth embodiment. It is a cross-sectional view of the inside air suction duct 31 of the sixth embodiment. It is a cross-sectional view of the inside air suction duct 31 of the seventh embodiment. It is a front view in the vehicle mounting state of the air blower unit 10 in 8th Embodiment. It is a top view of the air blower unit 10 in FIG. It is the XIV-XIV sectional view taken on the line in FIG. It is a cross-sectional view of the inside air suction duct 31 of the ninth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 14 Inside / outside air switching box 15 Inside air introduction port 11 Blower 21 Air conditioning case 22 Evaporator 23 Heater core 31 Duct for inside air 33 Connection port 34 1st suction port 35 2nd suction port 40 Partition wall

Claims (6)

In the inside air suction duct (31), which communicates with the upstream side of the inside air introduction port (15) of the vehicle air conditioner and forms an air passage through which vehicle interior air flows toward the inside air introduction port (15).
It communicates with the inside air inlet (15) that opens upward.
One or more air inlets (34, 35, 43, 44) for inhaling air in the passenger compartment,
The said suction inlet (34, 35, 43, 44) is the position of the same height as the said inside air introduction opening, and is opened facing the horizontal direction, The duct for inside air suction characterized by the above-mentioned. The inside air inlet (15) is open upward and horizontally.
The suction ports (34, 35) are open in a horizontal direction in a direction intersecting the opening direction of the inside air introduction port (15),
2. The inside air suction duct according to claim 1, wherein the inside air suction duct has a shape that forms an air passage that is bent halfway from the suction port (34, 35) to the inside air introduction port (15). The inside air inlet (15) opens upward and toward the rear of the vehicle,
The inside air suction duct according to claim 2, wherein the suction port (34, 35) is opened in a vehicle left-right direction. A shape extending from the inside air introduction port (15) toward the rear of the vehicle, a side surface (39) on the vehicle rear side facing the inside air introduction port (15) at a tip portion of the extension destination, and a left side of the vehicle A side surface (31a) and a vehicle right side surface (31b);
The suction port (34, 35) is provided on both the side surface (31a) on the left side of the vehicle and the side surface (31b) on the right side of the vehicle,
The suction port (34) provided for the side surface (31a) on the left side of the vehicle opens toward the left side of the vehicle,
The inside air suction duct according to claim 3, wherein the suction port (35) provided to the side surface (31 b) on the right side of the vehicle opens toward the right side of the vehicle.   Further, a partition wall (40) extending from the side surface (39) on the vehicle rear side toward the inside air inlet (15) is provided between the two suction ports (34, 35). The inside air suction duct according to claim 4. An air conditioning case (21) forming an air passage through which air flows toward the passenger compartment;
The inside air suction duct (31) according to any one of claims 1 to 5, wherein the inside air inlet (15) communicates with an inside air introduction port (15) for introducing vehicle interior air into the air conditioning case (21).
A blower (11) for forming an air flow inside the air conditioning case (21);
A cooling heat exchanger (22) that is housed in the air conditioning case (21) and cools the air flowing through the air conditioning case (21);
A vehicle air conditioner comprising: a heating heat exchanger (23) that heats air flowing inside the air conditioning case (21) housed in the air conditioning case (21).

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