JP2017226333A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heating capacity to an under-knee portion of an occupant seating on a front side seat or an occupant seating on a rear side seat.SOLUTION: A vehicle air conditioner includes: a rear heater duct 2 installed under a front side seat for blowing hot air to occupant's feet on a rear side seat; and an auxiliary heater duct 3 connected to the rear heater duct and splitting flow of the hot air blown from the rear heater duct into two directions. The auxiliary heater duct comprises: a connection duct part 31 the connection side of which for being connected to the rear heater duct functions as a connection port and the other side of which functions as an outlet; a branching duct part 32 connected to an inner wall surface between both end parts of the connection duct part in a communicated state and blowing the hot air to the under-knee portion upper than the occupant's feet from an outlet 32a; and a flow split fin 33 formed on the inner wall surface below the connection duct part located below a communication hole 36 formed at a connection portion between the connection duct part and the branching duct part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle air conditioner, and more particularly, to a vehicle air conditioner provided with a rear heater duct having a blower outlet for blowing warm air from under the seat on the front side of the vehicle toward the feet of a passenger seated on a rear seat. .

  2. Description of the Related Art Conventionally, a vehicle air conditioner that includes a rear heater duct that has a blower outlet that blows warm air from under a seat on the front side of the vehicle toward the feet of a passenger seated on a rear seat is known (for example, a patent) Reference 1 and Patent Reference 2).

  The apparatus disclosed in Patent Document 1 includes a front heater that heats the feet of an occupant seated in the second row seat together with an occupant seated in the first row seat, and a rear heater that heats the feet of the occupant seated in the third row seat. And.

  The front heater is connected to a first rear heater duct provided under the first row seat to heat the feet of the occupant seated on the second row seat, and the rear heater is connected to the occupant seated on the third row seat. In order to heat the feet, it is connected to a second rear heater duct provided under the second row seats.

  Furthermore, by connecting a third rear heater duct to the rear heater and the first rear heater duct, and heating the feet of the occupants seated on the second row seat with the third rear heater duct from the front side of the vehicle, Heating capacity for passengers seated in the second row seat is improved.

  The apparatus disclosed in Patent Document 2 includes a front heater that heats the feet of the occupant seated in the second row seat together with the occupant seated in the first row seat, and a front heater provided under the first row seat. And a connected rear heater duct.

  The rear heater duct folds back a part of the airflow from the vehicle rear side to the first blowout portion that blows warm air from the front side of the vehicle to the feet of the occupants seated on the second row seat, and from the vehicle rear side. A second blow-out unit that blows warm air toward the feet of the passengers seated on the first-row seat is provided.

  By configuring the rear heater duct in this way, it is possible to heat the feet of the occupants seated on the second row seat at the first blowing portion, and at the same time, seated on the first row seat at the second blowing portion. The feet of passengers can be heated.

JP 2002-321519 A JP 2010-36636 A

  However, in the apparatus disclosed in Patent Document 1 described in the background art, the rear heater and the first rear heater duct are connected to the third rear heater in order to improve the heating capability for the passenger seated on the second row seat. Since it has to be connected to a duct, there is a difficulty in securing a large space for it on the floor panel. In addition, the apparatus disclosed in Patent Document 1 cannot improve the heating capacity of the calves of the occupants seated on the first row seats.

  Moreover, in the apparatus disclosed in Patent Document 2, the heating ability of the shin of the occupant seated in the first row seat can be improved, but the heating ability of the shin of the occupant seated in the second row seat can be improved. I couldn't.

  Furthermore, in the devices disclosed in Patent Document 1 and Patent Document 2, in order to improve the heating capability of the occupant's lower knee part seated on the seat, the seat is seated on the first row seat according to the needs of vehicle users such as automobiles. It was not possible to selectively change the warm air distribution with respect to the occupant's calf and the occupant's shin seated in the second row seat.

  The present invention has been made to solve the above-described conventional problems, and can improve the heating capacity of a passenger seated on a front seat or a passenger's lower knee seated on a rear seat so that the heating capacity of the vehicle can be improved. The purpose is to provide.

  Further, the present invention selectively changes the distribution of hot air to the occupant's calf seated on the front seat and the occupant's shin seated on the rear seat in accordance with the needs of a vehicle user such as an automobile. It aims at providing the vehicle air conditioner which can do.

The vehicle air conditioner according to the first aspect of the present invention that achieves the above object includes a heater duct and an auxiliary heater duct of the vehicle.
The auxiliary heater duct is connected to the heater duct and diverts warm air blown out from the heater duct in two directions.

Such an auxiliary heater duct is composed of a connecting duct portion, a branching duct portion, and a flow dividing fin.
In the connecting duct portion, the connecting side to be connected to the heater duct is a connecting port, and the other side is an outlet for blowing warm air to the feet of the occupant.
The branching duct portion is connected in a state where it communicates with the inner wall surface between both end portions of the connecting duct portion, and blows warm air from the air outlet to the lower knee part above the feet of the occupant. In the present specification, “communication” means that a continuous state is established through passages between two separated spaces.
The diversion fin is formed on the inner wall surface on the lower side of the connecting duct portion located below the communication hole formed in the connecting portion between the connecting duct portion and the branching duct portion.

  According to the vehicle air conditioner of the first aspect as described above, the branching duct portion is connected so that the warm air is blown out toward the calf that is the lower knee part above the feet of the occupant seated on the front seat. When the duct part is connected to the heater duct, when hot air is blown from the heater duct to the auxiliary heater duct, the warm air is distributed to the outlet of the connecting duct part and the outlet of the branching duct part by the diverting fins. Therefore, warm air is blown out from the outlet of the connecting duct portion toward the feet of the occupant seated on the rear seat, and the expansion of the occupant seated on the front seat from the outlet of the branch duct portion Since the warm air is blown out, the heating ability of the occupant seated on the front seat to the lower knee region can be improved.

  Further, when the connecting duct portion is connected to the heater duct so that the branching duct portion blows warm air toward the shin that is the lower knee part above the feet of the occupant seated on the rear seat, the heater duct When the warm air is blown from the auxiliary heater duct to the auxiliary heater duct, the warm air can be distributed to the outlet of the connecting duct part and the outlet of the branching duct part by the diverting fin. As warm air is blown out toward the feet of the passenger seated in the rear seat, and warm air is blown out from the outlet of the branching duct portion toward the shin of the passenger seated in the rear seat In addition, it is possible to improve the heating ability of the occupant seated on the rear seat to the lower knee region.

  The second aspect of the present invention is the vehicle air conditioner according to the first aspect of the present invention, wherein the shunt fins send the warm air blown to the connecting duct part via the heater duct and the outlet of the connecting duct part. In order to divert to the branching duct part, it is formed on the inner wall surface below the connecting duct part so that warm air flows toward the branching point between the branching duct part and the downstream side of the connecting duct part. It is what.

  According to the vehicle air conditioner which is such a second aspect, when warm air is blown from the heater duct to the auxiliary heater duct, the warm air is downstream of the branching duct portion and the connecting duct portion by the diverting fins of the auxiliary heater duct. Since the air flows toward the branch point with the side, it is possible to reliably distribute the warm air to the outlet of the connecting duct portion and the outlet of the branch duct portion at the branch point.

  According to a third aspect of the present invention, in the vehicle air conditioner according to the first aspect or the second aspect, the connecting means is connected to the heater duct together with the heater duct for detachably connecting the connecting duct portion of the auxiliary heater duct to the heater duct. It is provided at each of both ends of the duct portion.

  According to the vehicle air conditioner as the third aspect as described above, since the connecting means is provided at each of both ends of the connecting duct part together with the heater duct, the front seat is adapted to the needs of the vehicle user such as an automobile. It is possible to selectively change the distribution of warm air to the expansion shin of the occupant seated in the seat and the shin of the occupant seated in the rear seat.

  According to a fourth aspect of the present invention, in the vehicle air conditioner according to any one of the first to third aspects, the shunt fin is formed in a triangular shape with the apex positioned above, and is used for connection. It is arranged in the duct part.

  According to such a fourth aspect of the vehicle air conditioner, the hot air blown from the heater duct to the auxiliary heater duct is distributed in the same manner regardless of the connecting direction of the connecting duct portion of the auxiliary heater duct to the heater duct. Can be diverted by operation.

  The fifth aspect of the present invention is the vehicle air conditioner according to the fourth aspect of the present invention, wherein the shunt fins are connected to the connecting duct portion of the communication hole formed at the connecting portion between the connecting duct portion and the branching duct portion. It is arrange | positioned at the said duct part for a connection so that a vertex may be located in the substantially center position in an axial direction.

  According to such a fifth aspect of the vehicle air conditioner, the same air volume with respect to the warm air blown from the heater duct to the auxiliary heater duct, regardless of the connecting direction of the connecting duct portion of the auxiliary heater duct to the heater duct. It becomes possible to distribute with.

  According to the vehicle air conditioner of the present invention, it is possible to improve the heating capacity of the occupant seated on the front seat or the lower knee portion of the occupant seated on the rear seat.

  In addition, according to the vehicle air conditioner of the present invention, in accordance with the needs of a vehicle user such as an automobile, the distribution of warm air to the occupant's shin seated on the front seat and the occupant's shin seated on the rear seat Can be selectively changed.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the arrangement | positioning state of the rear heater duct and auxiliary heater duct with which the vehicle air conditioner of this invention was equipped, (A) is the passenger | crew with which the blower outlet of the auxiliary heater duct sat down to the rear seat with respect to the rear heater duct. The figure arrange | positioned so that it may blow off toward the shin of FIG., (B) is the figure arrange | positioned so that the blower outlet of an auxiliary heater duct may blow out toward the passenger | crew's calf seated in the front seat with respect to the rear heater duct. . It is a disassembled perspective view which shows the arrangement | positioning state of the rear heater duct and auxiliary heater duct of FIG. It is explanatory drawing which shows the flow direction of the air-conditioning wind in the vehicle air conditioner of FIG. 1, (A) is a figure which shows the case of a rear heater duct single-piece | unit, (B) is a figure which shows the case of the arrangement state of FIG. (C) is a figure which shows the case of the arrangement | positioning state of FIG. 1 (B). FIG. 2 is a diagram obtained by thermographically measuring the body surface temperature in the arrangement state of (A) by the vehicle air conditioner of FIG. 1, (A) is an explanatory view showing a foot part that has been thermographically measured, The thermographic image at the time, (C) is the thermographic image at the time of FIG. It is explanatory drawing which shows to which site | part of warm air the warm air blows off in the arrangement | positioning state of (B) of the vehicle air conditioner of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing a vehicle air conditioner of the present invention will be described with reference to the drawings. 1A, 1B, and 2 used in the embodiment for carrying out the present invention, directions are indicated by arrows in each figure. This is seen from a passenger seated in the driver's seat. Shows the direction. ← Fr indicates the front direction of the vehicle, and H indicates the upward direction of the vehicle. In FIGS. 1A and 1B, the rear heater duct and the auxiliary heater duct are separated, but for convenience of explanation, the warm air blown from the rear heater duct is divided into two directions by the auxiliary heater duct. This shows the air distribution operation.

  This vehicle air conditioner includes a rear heater duct 2 and an auxiliary heater duct 3 as shown in FIGS.

The rear heater duct 2 is connected to the air conditioning unit so that warm air from the heater unit and the blower unit provided in the air conditioning unit provided on the back side of the instrument panel in the passenger compartment is blown (not shown). )
Such a rear heater duct 2 is installed on the floor of the vehicle and blows out hot air from under the seat on the front side of the vehicle toward the feet of the passenger seated on the rear seat arranged on the rear portion of the front seat. 21. For example, when the rear heater duct 2 is installed on the floor surface below the first row seat, the feet of the passengers seated on the second row seat can be heated. In this case, the hot air selected by the air conditioning unit is blown out (not shown). Further, when the rear heater duct 2 is installed on the floor surface under the second row seat, the feet of the passengers seated on the third row seat can be heated. In this case, a heater is installed on the floor surface under the second row seat (not shown).

  In addition, the rear heater duct 2 is disposed by being inserted into a through hole 41 provided in a cross member 4 disposed in a vehicle left-right direction on a floor panel (not illustrated) in the drawing. The auxiliary heater duct 3 described later can also be applied to the rear heater duct 2 disposed on the floor panel. A carpet 5 is laid on the cross member 4.

  The auxiliary heater duct 3 is connected to the rear heater duct 2 and diverts warm air blown from the rear heater duct 2 in two directions. Such an auxiliary heater duct 3 includes a connecting duct portion 31, a branching duct portion 32, and a diverter fin 33.

  In order for the connecting duct portion 31 to be detachably connected to the rear heater duct 2, a connecting means 34 is provided in each of the both end portions 31 a and 31 b together with the rear heater duct 2, and the both end portions 31 a and 31 b are connected to the connecting port on the connecting side. The other side is the outlet. In the drawing, one end 31a is an outlet 31c, and the other end 31b is an outlet 31d.

  In the drawing, the connecting means 34 is a concave-convex fitting structure constituted by a convex portion 34a provided in the rear heater duct 2 and concave portions 34b, 34c provided at both end portions 31a, 31b of the connecting duct portion 31, respectively. However, the present invention is not limited to this, and a concave-convex fitting structure constituted by convex portions provided at both end portions 31 a and 31 b of the connecting duct portion 31 and concave portions provided in the rear heater duct 2 may be used. Moreover, although such a convex part and a recessed part may be provided in the whole circumference | surroundings of the opening part of a duct, you may provide not only in this but in a part around the opening part of a duct. Any one of the ducts may be adopted as long as it does not come off easily when the duct is inserted into the other duct.

  The rear heater duct 2 and the auxiliary heater duct 3 having the concave-convex fitting structure 34 are formed so that any one duct can be inserted into the other duct so that the convex portion can be fitted into the concave portion. Therefore, the rear heater duct 2 and the auxiliary heater duct 3 are preferably formed of a material having an elastic force that can be bent by an external pressure.

  Thus, by applying the concave-convex fitting structure to the connecting means 34, the connecting means 34 can be detachably connected and cannot be easily detached after the connection. The connecting means 34 is not limited to the concave-convex fitting structure, and may have any structure as long as it can be detachably connected.

  Such a connecting duct portion 31 is disposed so that its axial direction is basically along the vehicle longitudinal direction. This is because the warm air blown from the rear heater duct 2 is blown out from the outlet without resistance.

  The branching duct portion 32 is coupled in a state where it communicates with the inner wall surface between the both end portions 31a and 31b of the connecting duct portion 31, and blows warm air from the air outlet 32a to the site below the knee above the feet of the occupant. . The branching duct portion 32 is formed, for example, so as to be disposed at a position where the air outlet 32a blows out to the occupant's shin or expansion shin corresponding to the connecting direction of the auxiliary heater duct 3 to the rear heater duct 2. It consists of a curved pipe. Here, “arrangement” means providing at each position. In the auxiliary heater duct 3 having such a branching duct portion 32, a communication hole 36 is formed at a connecting portion between the connecting duct portion 31 and the branching duct portion 32.

  The branching duct part 32 is extended upward from the first part 32b in a state inclined from the joint part of the connecting duct part 31, and the outlet 32a by extending from the first part 32b. Is formed from the second portion 32c in which is formed. The first part 32b is formed so as to incline toward the outlet 32a of the second part 32c. This is because the warm air that has been diverted from the connecting duct portion 31 flows gently and smoothly toward the outlet 32a of the second portion 32c.

  The diverting fins 33 are formed on the inner wall surface of the lower side of the connecting duct portion 3 located below the communication hole formed at the connecting portion between the connecting duct portion 3 and the branching duct portion 32. Such a diversion fin 33 is for diverting the warm air blown to the connecting duct portion 3 through the rear heater duct 2 to the outlet side of the connecting duct portion 3 and the branching duct portion 32. Further, in accordance with the connecting direction of the auxiliary heater duct 3 with respect to the rear heater duct 2, the connecting duct portion 31 so that the warm air flows toward the branch point between the branching duct portion 32 and the downstream side of the connecting duct portion 31. Is formed on the lower inner wall surface. This branching point is formed with a first inter-duct branching point 35a on one end 31a side of the connecting duct part 31, and between the second ducts on the other end 31b side of the connecting duct part 31. A branch point 35b is formed.

  The diversion fins 33 are formed in a triangular shape with the apex 33 a positioned above, and are arranged in the connecting duct portion 31. By providing the diverter fins 33 in this way, the hot air blown from the rear heater duct 2 to the auxiliary heater duct 3 is the same regardless of the connection direction of the connecting duct portion 31 of the auxiliary heater duct 3 to the rear heater duct 2. It can be diverted by the air distribution action.

  The base angle of one hypotenuse 33b of the triangular flow dividing fin 33 formed in this way is the straight line connecting the apex 33a of the flow dividing fin 33 and the first inter-duct branching point 35a, and the connecting duct portion 31. The included angle is a straight line parallel to the axial direction. In addition, the base angle of the other hypotenuse 33c of the triangular diverting fin 33 is such that the straight line connecting the apex 33a of the diverting fin 33 and the second inter-duct branching point 35b, and the axial direction of the connecting duct portion 31. This is the included angle between the parallel straight lines. Such a shape of the branch points 35a and 35b is preferably formed in a square shape in order to distribute the warm air being blown without resistance.

  The diverter fins 33 are arranged in the connecting duct portion 31 so that the apex 33a is located substantially at the center position in the axial direction of the connecting duct portion 31 of the communication hole 36 formed in the auxiliary heater duct 3. Has been.

  By arranging the diverting fins 33 in the connecting duct portion 31 in this way, the auxiliary heater duct 3 is connected from the rear heater duct 2 to the auxiliary heater duct 3 regardless of the connecting direction of the auxiliary duct 3 to the rear heater duct 2. It becomes possible to distribute air with the same air volume with respect to the warm air blown.

  The apex 33a of the flow dividing fin 33 is substantially the center position in the axial direction of the connection duct portion 31 of the communication hole 36, and thus is not necessarily the center position of the communication hole 36 in the axial direction of the connection duct portion 31. In other words, it is only necessary that the warm air blown from the rear heater duct 2 can be evenly distributed to the air outlet of the connecting duct portion 31 and the air outlet 32a of the branching duct portion 32.

  FIG. 1A, FIG. 1B, and FIG. 1B show the air distribution operation in which the warm air blown from the rear heater duct is divided in two directions by the auxiliary heater duct 3 in the vehicle air conditioner 1 configured as described above. This will be described with reference to 3 (A), (B), and (C). In these drawings, the hot air flowing through the connecting duct portion is indicated by a dashed arrow, and the hot air flowing through the branching duct portion is indicated by a solid arrow.

  When the connecting duct portion 31 is connected to the rear heater duct 2 so that the hot air is blown toward the calf, which is the lower knee part above the feet of the passenger sitting on the front seat, the branching duct portion 32 (FIG. 1 (A), FIG. 3 (B)), when heating is selected by the air conditioning unit and hot air is blown from the rear heater duct 2 to the auxiliary heater duct 3, the hot air is connected by the diverting fins 33 to the connecting duct portion. The air can be distributed to the air outlet 31d of 31 and the air outlet 32a of the branching duct portion 32. Accordingly, hot air is blown out from the air outlet 31d of the connecting duct portion 31 toward the feet of the occupant seated on the rear seat, and the ridge of the occupant seated on the front seat from the air outlet 32a of the branching duct portion 32 is provided. Since the warm air is blown out, the heating ability of the occupant seated on the front seat to the lower knee region can be improved.

  Further, the connecting duct portion 31 is connected to the rear heater duct 2 so that the branching duct portion 32 blows warm air toward the shin, which is the lower knee part above the feet of the occupant seated on the rear seat. In this case (FIGS. 1B and 3C), when warm air is blown from the rear heater duct 2 to the auxiliary heater duct 3, the warm air is blown out by the diverter fins 33 to the outlet 31c of the connecting duct portion 31. The air can be distributed to the air outlet 32a of the branching duct portion 32. Accordingly, warm air is blown out from the outlet 31c of the connecting duct portion 31 toward the feet of the occupant seated on the rear seat, and the passenger seated on the rear seat from the outlet 32a of the branching duct portion 32. Since warm air is blown out toward the shin, it is possible to improve the heating ability of the occupant seated on the rear seat to the lower knee region.

  Furthermore, the diversion fin 33 divides the warm air blown to the connecting duct portion 31 via the rear heater duct 2 into the outlet port of the connecting duct portion 31 and the branching duct portion 32. Since it is formed on the inner wall surface on the lower side of the connecting duct portion 31 so that the warm air flows toward the branching point between the branching duct portion 32 and the downstream side of the connecting duct portion 31, the rear heater duct 2 When warm air is blown into the auxiliary heater duct 3, the warm air flows toward the branch point between the branching duct portion 32 and the downstream side of the connecting duct portion 31 by the diverter fins 33 of the auxiliary heater duct 3. The warm air can be reliably distributed at the branching point to the outlet of the connecting duct part and the outlet of the branching duct part.

  Further, since connecting means 34 are provided at both ends of the connecting duct portion 31 together with the rear heater duct 2, the passenger's calf seated on the front seat and the rear side according to the needs of a vehicle user such as an automobile. The warm air distribution with respect to the shin of the occupant seated on the seat can be selectively changed.

  When the connecting duct portion 31 is not connected to the rear heater duct 2 (FIG. 3A), the temperature is increased from the outlet 21 of the rear heater duct 2 toward the feet of the passenger seated on the rear seat. Only the wind is blown out.

  As described above, since the auxiliary heater duct 3 formed as described above is simply connected to the rear heater duct 2, the two objects of the present invention can be achieved, so that a large space is provided on the floor panel. The need to secure

  Next, the case where only the rear heater duct 2 is used and the auxiliary heater duct 3 so that the warm air blows out from the outlet 32a of the branching duct portion 32 of the auxiliary heater duct 3 toward the passenger's calf seated on the front seat. In the case where the auxiliary heater duct 3 is connected to the rear heater duct 2, as shown in FIG. 4A, the body surface temperature of the calf A1 seated on the front seat is measured by thermography (use device: thermal imaging camera T335). (Made by FLIR)).

  The measurement results are shown in FIGS. 4 (B) and 4 (C). When (B) is only the rear heater duct 2, (C) is the result when the auxiliary heater duct 3 is connected to the rear heater duct 2. As can be seen from this result, the occupant seated on the front seat in the case where the auxiliary heater duct 3 is connected to the rear heater duct 2 in both cases of the measurement time of 5 minutes and 8 minutes than in the case of the rear heater duct 2 alone. It was confirmed that the heating ability to the lower knee part of the baby was improved.

  From this result, the auxiliary heater duct 3 is connected to the rear heater duct 2 so that warm air is blown out from the outlet 32a of the branching duct portion 32 of the auxiliary heater duct 3 toward the knee of the passenger seated on the rear seat. Even in the case where the hot air is blown from the outlet 31c of the connecting duct portion 31 as shown in FIG. 5, the hot air blown from the passenger's feet A3 and the hot air blown from the outlet 32a of the branching duct portion 32 is Since each occupant's shin A2 can be warmed, it can be inferred that the heating capacity of the occupant's lower knee area seated on the rear seat is improved as compared with the case of the rear heater duct 2 alone.

  In the auxiliary heater duct 3, the inner diameter W1 on the one end portion 31c side and the inner diameter W2 on the other end portion 31d side of the connecting duct portion 31 and the inner diameter W3 of the branching duct portion 32 are equal in size. It is preferable. This is because warm air can be evenly distributed from the outlet of the connecting duct portion 31 and the outlet 32a of the branching duct portion 32. However, the inner diameters of these duct portions are not necessarily equal in size, and may be changed according to the required air distribution ratio.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

DESCRIPTION OF SYMBOLS 1 ... Vehicle air conditioner 2 ... Rear heater duct 21 ... Air outlet 3 ... Auxiliary heater duct 31 ... Connection duct part 31c, 31d ... Air outlet 32 ... Branching duct part 32a ... Air outlet 33 …… Diverting fin 33a …… Vertex 34 …… Concavity and convexity fitting structure (connecting means)
34a …… Convex part 34b …… Concave part

35a …… Branch point between the first ducts 35b …… Branch point between the second ducts

Claims (5)

An auxiliary heater duct that is connected to the heater duct of the vehicle and divides the hot air blown from the heater duct in two directions;
The auxiliary heater duct is
A connecting duct portion that is connected to the heater duct is a connecting port, and the other side is a connecting duct portion that serves as a blowout port that blows out the warm air to the feet of an occupant.
A branching duct part that is coupled in a state of communicating with the connecting duct part, and blows out the warm air from a blowout port to a lower knee part above the feet of the occupant,
It consists of a diversion fin formed on the lower inner wall surface of the connecting duct portion located below the communication hole formed in the connecting portion of the connecting duct portion and the branching duct portion. A vehicle air conditioner.   The diversion fin is used for branching in order to divert the warm air blown to the connection duct part through the heater duct to the outlet and the branch duct part of the connection duct part. 2. The inner wall surface on the lower side of the connecting duct portion is formed so that the warm air flows toward a branch point between the duct portion and the downstream side of the connecting duct portion. The vehicle air conditioner described.   The connecting means is provided at each of both ends of the connecting duct portion together with the heater duct in order to detachably connect the connecting duct portion of the auxiliary heater duct to the heater duct. The vehicle air conditioner according to claim 2.   4. The vehicle according to claim 1, wherein the shunt fin is formed in a triangular shape having an apex located at an upper side, and is arranged in the connecting duct portion. 5. Air conditioner.   The shunt fin is positioned so that the apex is located substantially at the center position in the axial direction of the connecting duct portion of the communication hole formed at the connecting portion of the connecting duct portion and the branching duct portion. The vehicle air conditioner according to claim 4, wherein the vehicle air conditioner is disposed in the connecting duct portion.