JP2018199468A - Air-conditioning duct structure for automobile - Google Patents

Abstract

To provide an air-conditioning duct structure for an automobile capable of attaining request properties for both when air-conditioning is necessary and when it is unnecessary at a rear seat.SOLUTION: An air-conditioning duct structure for an automobile includes: an underfloor duct that is a pipe line disposed below a floor surface of a cabin and guides air-conditioning air of an air-conditioning unit from a front side of the cabin via a rear end opening to a rear seat side; a duct opening formed on the floor surface; and a lifting/lowering duct fitted to the duct opening to enable lifting/lowering and having a duct side wall and an upper surface for closing an upper part of the duct side wall. The duct side wall of the lifting/lowering duct includes: a communication hole opened at a front side or a lateral side of the cabin; and a blowout port located above the communication hole and opened at a rear side of the cabin. A lifting/lowering position of the lifting/lowering duct includes: a ventilation position in which the underfloor duct and the lifting/lowering duct communicate with each other via the rear end opening and the communication hole while the blowout port is exposed to the upper side of the floor surface; and an accommodation position in which the upper surface is located at a lower side of the floor surface and the rear end opening is closed by the duct wall at an upper side of the communication hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automobile air conditioning duct structure. More particularly, the present invention relates to an air conditioning duct structure for an automobile that facilitates securing the foot space of a rear seat occupant when air conditioning is not required at the rear seat, and allows easy adjustment of the airflow direction and air volume when air conditioning is performed at the rear seat.

  As a vehicle air-conditioning duct structure that guides the conditioned air of the air-conditioning unit from the front of the vehicle to the rear seat side, a configuration described in Patent Document 1 is known. As shown in FIG. 5, this type of air conditioning duct structure has a duct body 111 extending substantially from the front to the rear in the center of the passenger compartment 100, and a bifurcated left and right at the rear end of the duct body 111. And a branch duct 113 passing therebelow. The duct body 111 and the branch duct 113 are disposed below the floor carpet Fc in the passenger compartment 100. The rear end of the branch duct 113 is a blowout opening 115, which is arranged toward a rear seat (not shown) and configured to blow conditioned air toward the rear seat.

JP 2001-088543 A

  There is a need for an air conditioning duct structure for automobiles that satisfies both required and unnecessary characteristics of air conditioning according to the necessity of air conditioning at the rear seat.

  As shown in FIG. 6A, among the branch ducts 113 passing under the front seat FrS, the front side thereof is disposed below the floor carpet Fc, and the rear end portion is passed through an opening provided in the floor carpet Fc. In the configuration exposed upward, it is easy to adjust the wind direction and the air volume. This is because there is no shielding in front of the rear end of the branch duct 113, and the direction of the conditioned air can be made almost horizontal. On the other hand, since the rear end portion of the branch duct 113 is exposed above the floor carpet Fc, the clearance between the lower surface of the front seat FrS and the floor carpet Fc is narrow, and it is difficult to secure the foot space and the loading space for the passenger in the rear seat. . In particular, depending on the amount of forward sliding of the front seat FrS, the rear end portion of the branch duct 113 may be exposed from the rear of the front seat FrS.

  As shown in FIG. 6B, when the rear end portion of the branch duct 113 is positioned below the floor carpet Fc, the rear end portion of the branch duct 113 is not exposed above the floor carpet Fc. There is no problem of appearance. In addition, the clearance between the lower surface of the front seat FrS and the floor carpet Fc can be secured, and it is easy to secure the foot space and the loading space for the passenger in the rear seat. On the other hand, on the front surface of the rear end of the branch duct 113, there is an inclined surface that guides the conditioned air from the opening at the rear end to above the floor carpet Fc. Therefore, the wind direction of the conditioned air is obliquely upward and the wind direction is limited, and the air volume in the intended direction is also limited.

  One of the objects of the present invention is to provide an air conditioning duct for automobiles that can easily secure a foot space and a loading space for a rear seat occupant when air conditioning is not required in the rear seat, and that can easily adjust the direction and volume of the conditioned air during air conditioning in the rear seat. To provide a structure.

An air conditioning duct structure for an automobile according to an aspect of the present invention is as follows.
A duct arranged below the floor surface of the passenger compartment, and an underfloor duct for guiding the conditioned air of the air conditioning unit from the front of the passenger compartment through the rear end opening to the rear seat side,
A duct opening formed in the floor surface;
Elevating duct fitted to the duct opening so as to be movable up and down, and having a duct side wall and an upper surface closing the upper part of the duct side wall,
The duct side wall of the elevating duct is
A communication hole that opens to the front or side of the vehicle compartment;
A blower opening that opens on the rear side of the passenger compartment above the communication hole;
The lifting position of the lifting duct is
With the blowout port exposed above the floor surface, a ventilation position where the underfloor duct and the elevating duct communicate with each other through the rear end opening and the communication hole,
The upper surface is located below the floor surface and has a storage position in which the rear end opening is closed by the duct side wall above the communication hole.

  According to said structure, the air-conditioning duct structure according to the necessity of the air conditioning in a backseat can be comprised by using a raising / lowering duct in the location which blows off air-conditioning wind toward the backseat side. When air conditioning at the rear seat is required, the outlet can be exposed above the floor surface by setting the ventilation duct to the ventilation position. At this time, since there is no shielding object in front (rear) of the air outlet, it is easy to adjust the wind direction and the air volume. On the other hand, when air conditioning at the rear seat is unnecessary, the lifting duct can be placed in the storage position so that the lifting duct does not protrude from the floor surface. Thereby, there is no problem of stepping on the rear end of the air-conditioning duct structure or appearance, and it is easy to secure the foot space and the loading space for the rear seat occupant.

1 is an overall schematic diagram showing an automotive air conditioning duct structure according to Embodiment 1. FIG. It is the partial schematic diagram in the ventilation position which shows the blowing location vicinity of the air-conditioning duct structure for motor vehicles concerning Embodiment 1, and requires the air conditioning in a rear seat. It is the partial schematic diagram in the storing position which shows the blowing location vicinity of the air-conditioning duct structure for motor vehicles concerning Embodiment 1, and does not require the air conditioning in a backseat. It is the partial schematic diagram in the shielding position which shows the blowing location vicinity of the air-conditioning duct structure for motor vehicles concerning Embodiment 1, and needs an air conditioning only at a front seat. It is a schematic diagram of the conventional air-conditioning duct structure. The vicinity of the blowout part to the rear seat side in the conventional air-conditioning duct structure is shown, (A) is a schematic diagram of a configuration in which a branch duct protrudes on the floor surface, and (B) stores the branch duct below the floor surface. It is a schematic diagram of a structure.

  Embodiments of the present invention will be described below with reference to the drawings. Reference is mainly made to FIGS. 1 to 4, but FIG. 5 is also referred to when necessary. In any of the drawings, Fr indicates the front of the vehicle, Rr indicates the rear of the vehicle, Up indicates the upper side of the vehicle, and Lwr indicates the lower side of the vehicle. The present invention is not limited to the configurations shown in the embodiments, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[Embodiment 1]
<Overview>
The automotive air conditioning duct structure of the first embodiment includes an underfloor duct 110 disposed below the floor surface 100F of the passenger compartment 100, as shown in FIG. The underfloor duct 110 constitutes a part of the air conditioning duct similarly to the air conditioning duct of FIG. 5 and guides the conditioned air from the air conditioning unit AC provided in front of the vehicle to the rear seat side. One of the features of this air-conditioning duct structure is that as shown in FIG. 1, an elevating duct 120 is provided at the rear end of the underfloor duct 110, and the elevating duct 120 is moved up and down to a predetermined position, so that The purpose is to realize an air conditioning environment and a vehicle interior environment according to the situation such as necessity of air conditioning. Hereinafter, the configuration of each unit will be described in detail.

<Car cabin>
The outline of the passenger compartment 100 is generally the same as the conventional configuration shown in FIG. An instrument panel IP is provided in front of the passenger compartment 100, and a front seat FrS and a rear seat (not shown) are sequentially provided rearward. The instrument panel IP includes an air conditioning unit AC therein, and a plurality of air outlets AC1, AC2, AC, etc. are provided on the surface of the panel IP for DEF, Face, and Foot for air conditioning of the front seat FrS. AC3 is opened (FIGS. 1 and 5).

  Known configurations can be used for the front seat FrS, the rear seat, and the air conditioning unit AC. The front seat FrS having a driver seat and a passenger seat includes a seat cushion Sc and a seat back Sb, and can slide the seat cushion Sc back and forth with respect to the floor surface 100F. The rear seat may be either a bench seat or an independent seat. The air conditioning unit AC has a heater core that heats air for heating and an evaporator that cools air for cooling. The air conditioning unit AC supplies warm air or cold air conditioned therewith into the passenger compartment 100 from the outlet 125.

  The floor surface 100 </ b> F of the passenger compartment 100 is a surface constituting the outermost surface of the floor in the passenger compartment 100. In FIG. 1, the floor surface 100F is indicated by hatching. For example, as in the present example, when the floor carpet Fc is arranged on the floor base panel Fb with a space between the spacers, the surface of the floor carpet Fc is the floor surface. In addition, when a floor upper panel is disposed on the floor base panel Fb with a spacer, the surface of the floor upper panel is the floor surface 100F. In the space between the floor surface 100F and the floor base panel Fb, an underfloor duct 110 described later is disposed.

  Further, a duct opening 100H into which a lifting duct 120 described later is fitted is formed at a position corresponding to the rear of the front seat FrS on the floor surface 100F (FIGS. 2 to 4). The opening shape of the duct opening 100H is not particularly limited. The opening shape of the duct opening 100 </ b> H is preferably a shape corresponding to the cross-sectional shape of the lifting duct 120. In this example, the opening has a substantially D shape.

  As in this example, when the duct housing cylinder 130 described below is used, the upper opening 133 of the duct housing cylinder 130 corresponds to the duct opening 100H, and the elevating duct 120 is fitted into the duct housing cylinder 130. The cross-sectional shape of the duct housing cylinder 130 is also preferably a shape corresponding to the cross-sectional shape of the lifting duct 120.

  The duct housing cylinder 130 is a cylindrical body that functions as a guide for the vertical movement of the elevating duct 120 by being fitted into the duct opening 100H. Furthermore, the duct storage cylinder 130 can also serve as a support member for the rear end by connecting the rear end of the underfloor duct 110.

  The duct storage cylinder 130 is formed of a cylindrical member having an upper opening, and stores an elevating duct 120 (described later) constituting the rear end portion of the air conditioning duct (FIGS. 2 to 4). In this example, the duct housing cylinder 130 is formed of a bottomed cylindrical member having a substantially D shape in plan view. The planar shape of the duct housing cylinder 130 is not limited to the D shape, and an appropriate shape corresponding to the outer shape of the elevating duct 120 can be selected. For example, it may be a polygon such as a rectangle, a circle, or an ellipse. This bottomed cylindrical member has a storage side wall 132 through which an inlet 131 for conditioned air sent through the underfloor duct 110 is opened, an upper opening 133, and a bottom surface 134 in contact with the floor base panel Fb. The storage side wall of this example has a curved surface formed from both side surfaces in the vehicle width direction to the front side, a front side plane connecting both the curved surfaces, and a rear side plane connecting the rear sides of both side surfaces. The inlet 131 is formed corresponding to the rear end opening 110H of the underfloor duct 110. The introduction port 131 is formed on the front side or the side side of the storage side wall 132. In this example, the inlet 131 is formed in the middle of the front plane in the height direction. The shape and area of the air-conditioning air inlet 131 have a shape and an area substantially corresponding to a rear end opening 110H of a branch duct 113 (described later) that forms the rear side of the underfloor duct 110. On the other hand, the length of the rear side plane in the vehicle width direction is slightly smaller than the width of the front seat FrS. The duct housing cylinder 130 may be used as necessary, and is not essential for the configuration of the invention.

<Air conditioning duct>
The air conditioning duct includes a duct main body 111 that extends from the air conditioning unit AC under the floor surface 100F to the rear of the passenger compartment 100, a branch duct 113 that is branched into a plurality at the rear end of the duct main body 111, and a rear of the branch duct 113. And an elevating duct 120 connected to the end. The duct main body 111 and the branch duct 113 constitute an underfloor duct 110.

(Duct body)
The duct body 111 is a pipe line that extends downward from the air conditioning unit AC, is bent rearward of the vehicle, and guides the conditioned air to the middle of the front seat FrS. In this example, a rectangular duct with a flat cross section is arranged at the approximate center in the vehicle width direction to form the duct body 111. The cross-sectional shape of the duct body 111 is not particularly limited, and may be circular or elliptical. This also applies to the branch duct 113 described below.

(Branch duct)
The branch duct 113 is a pipe that branches from the rear end of the duct body 111 and supplies conditioned air to a plurality of locations in the vehicle width direction at the foot of the rear seat. In this example, it has two branch ducts 113 branched into two branches from the rear end portion of the duct body 111. The number of branch ducts 113 is not limited to two, and may be three, for example. Each of the branch ducts 113 is a rectangular duct having a flat cross section. Each branch duct 113 is disposed at a position corresponding to the lower side of the front seat FrS, and extends to a location that reaches substantially the rear of the front seat FrS. In this example, the rear end of the branch duct 113 is fitted into and supported by the inlet 131 of the duct housing cylinder 130.

(Elevating duct)
The elevating duct 120 is a hollow member that is housed in the duct housing cylinder 130 so as to be movable up and down and constitutes the rear end portion of the air conditioning duct. In this example, the shape in plan view is a substantially D-shaped hollow member, but this shape is not particularly limited. It may be a polygon such as a rectangle, a circle, or an ellipse.

  This hollow member has a duct side wall 121 that faces the storage side wall 132 of the duct storage cylinder 130, an upper surface 122 that closes the upper part of the duct side wall 121, and a bottom surface 123 that closes the lower part of the duct side wall 121 (FIG. 2 to FIG. 2). 4). Since the shape of the elevating duct 120 (hollow member) and the shape of the duct housing cylinder 130 correspond to each other, the duct side wall 121 has a curved surface formed from both side surfaces in the vehicle width direction to the front side and the front side connecting the two curved surfaces. It has a side plane and a rear side plane connecting the rear sides of both side surfaces.

  Furthermore, the duct side wall 121 of the hollow member has a communication hole 124 provided on the front side or the side side and a blowout port 125 provided on the rear side (FIG. 2).

  The communication hole 124 is an opening that overlaps with the inlet 131 (the rear end opening 110H of the branch duct 113) of the duct housing cylinder 130 in a state where the outlet 125 is exposed above the floor surface 100F. Since the inlet 131 of the duct housing cylinder 130 and the communication hole 124 of the lifting duct 120 overlap each other, the branch duct 113 and the lifting duct 120 are communicated with each other, and conditioned air can be supplied from the outlet 125 to the rear seat side. In this example, a communication hole 124 is formed in the middle of the height direction of the front plane of the elevating duct 120. The shape and area of the communication hole 124 is not particularly limited as long as it can overlap the inlet 131 of the duct housing cylinder 130 with the outlet 125 exposed above the floor surface 100F, but is similar to the inlet 131. It is preferable to have an area equal to or greater than that. Thereby, it can introduce into the raising / lowering duct 120, without interrupting the air-conditioning wind which passes along the inlet 131. FIG.

  The outlet 125 corresponds to the rear end of the air conditioning duct, and is an opening that supplies the conditioned air to the rear seat side by being exposed above the floor surface 100F (FIGS. 1 and 2). The shape and area of the blowout port are not particularly limited, but it is preferable to have a larger area than the introduction port 131 and the communication hole 124. In this example, almost the entire rear plane is used as a blowout port. More specifically, there is a partition at the center of the outlet 125 in the vehicle width direction, and a wind guide plate 126 extending in the vehicle width direction is provided between the partition and both side surfaces of the elevating duct 120. The rear side plane is opened. If the direction of the air guide plate 126 can be swung up and down, the direction of the conditioned air can be adjusted up and down.

  It is preferable that the height of the lifting duct 120 corresponds to the depth of the duct housing cylinder 130. With this configuration, when the elevating duct 120 is accommodated to the lowest position of the duct accommodating cylinder 130, the upper surface 122 of the elevating duct 120 is substantially flush with the floor surface 100F (FIG. 3). If the elevating duct 120 does not protrude from the floor surface 100F, it is easy to secure a space on the floor surface 100F. If the upper surface of the elevating duct 120 is not lowered from the floor surface 100F, the upper opening 133 to the upper surface 122 of the elevating duct 120 Since no recess is formed between them, it is possible to eliminate the drop of foreign matter into the recess.

  The width of the lifting duct 120 in the vehicle width direction preferably corresponds substantially to the width of the front seat FrS. When the width of the elevating duct 120 is large, the elevating duct 120 protruding from the floor surface 100F in the “shielding position” to be described later passes through the space between the lower surface of the front seat FrS and the floor surface 100F in front of the elevating duct 120. Easy to partition into space and rear space.

  The vertical movement of the elevating duct 120 may be manually operated or electrically operated using an actuator such as a motor and a power transmission mechanism that transmits the rotation of the motor as the vertical movement of the elevating duct. If manually operated, the drive source of the elevating duct 120 is unnecessary, and the configuration is simple. The elevating duct 120 may be lowered by the occupant stepping on the upper surface of the elevating duct with his / her foot. If it is electric, the actuator can control the vertical position of the lifting duct 120 to an arbitrary position.

  Further, the air conditioning duct structure of the present example also includes a holding mechanism (not shown) that can hold the elevating duct 120 at a predetermined vertical position in the duct housing cylinder. When the elevating duct 120 is manually moved up and down, the holding mechanism may include an engaging portion that engages the elevating duct 120 and the duct housing cylinder 130 at a predetermined position where the elevating duct 120 is desired to be held. The engaging portion is composed of a convex portion provided on one of the duct side wall 121 of the elevating duct 120 and the storage side wall 132 of the duct storage cylinder 130 and a concave portion provided on the other, and the convex portion and the concave portion are fitted. By doing so, the vertical position of the lifting duct 120 is maintained. When the elevating duct 120 is moved up and down electrically, the elevating duct 120 can be held at an arbitrary vertical position by controlling an actuator such as a motor. Therefore, the actuator, its controller, and the power transmission mechanism correspond to a holding mechanism. It will be.

  The predetermined lifting position of the lifting duct 120 has a “ventilation position” that requires air conditioning at the rear seat and a “housing position” that does not require air conditioning at the rear seat. Further, the elevating position of the present example also includes a “shielding position” that does not require air conditioning in the rear seat and can improve the air conditioning efficiency of the front seat.

<Operation>
The raising / lowering state of the raising / lowering duct 120 in each position of said ventilation position, storage position, and shielding position, and the air-conditioning state in the rear seat side are demonstrated based on FIGS.

(1) Ventilation position (Fig. 2)
The ventilation position is a suitable position when an occupant is in the rear seat and air conditioning is required on the rear seat side for the rear seat occupant. At the ventilation position, the elevating duct 120 is raised and protruded from the upper opening 133 of the floor surface 100F, so that the air outlet 125 is exposed above the floor surface 100F. At this time, the communication hole 124 of the elevating duct 120 overlaps with the inlet 131 of the duct housing cylinder 130. That is, the underfloor duct 110 (branch duct 113) and the elevating duct 120 are communicated with each other via the inlet 131 and the communication hole 124. Therefore, the conditioned air that has passed through the branch duct 113 is introduced into the elevating duct 120 via the rear end opening 110 </ b> H, the inlet 131, and the communication hole 124, and is supplied from the outlet 125 to the rear seat side. At this time, since a certain amount of clearance is formed between the lower surface of the front seat FrS and the upper surface 122 of the lifting duct 120, the conditioned air in the front seat FrS is supplied to the rear seat side through this clearance. Is also possible. Furthermore, if the vertical position of the lifting duct 120 is maintained at a position where the communication hole 124 of the lifting duct 120 is displaced and partially overlaps with the inlet 131 of the duct housing cylinder 130, the communication hole 124 and the inlet 131 match. Compared with the case where they overlap, the amount of conditioned air introduced into the elevating duct 120 can be regulated.

(2) Storage position (Fig. 3)
The storage position is a position suitable for cases other than the ventilation position and the shielding position described below. For example, there is a case where an occupant is in the rear seat but air conditioning of the rear seat is unnecessary. In the storage position, the elevating duct 120 is pushed into the innermost part of the duct storage cylinder 130. At this time, the bottom surface 123 of the elevating duct 120 abuts against the bottom surface 134 of the duct housing cylinder 130, and the upper surface 122 of the elevating duct 120 is substantially flush with the floor surface 100F. That is, there is no portion protruding from the upper opening 133 above the floor surface 100F. On the other hand, the communication hole 124 of the elevating duct 120 is located below the introduction port 131 of the duct housing cylinder 130. In other words, the inlet 131 of the duct housing cylinder 130 is blocked by the duct side wall 121 above the communication hole 124. Therefore, the conditioned air that has passed through the branch duct 113 is not introduced into the elevating duct 120, and the conditioned air is not supplied from the outlet 125.

(3) Shielding position (Fig. 4)
The shielding position does not perform air conditioning at the rear seat, but when air conditioning is performed only by the front seat FrS, the clearance between the lower surface of the front seat FrS and the floor surface 100F is partitioned by the lifting duct 120, and the air conditioning of the front seat FrS is performed. This is an effective position for preventing the wind from passing from the front space side to the rear space side of the lifting duct 120. In the shielding position, the elevating duct 120 is raised further than the ventilation position. At that time, the communication hole 124 of the elevating duct 120 is not exposed above the floor surface 100F and is closed by the storage side wall 132 above the introduction port 131 in the duct storage cylinder 130. In addition, the inlet 131 of the duct housing cylinder 130 is blocked by the duct side wall 121 below the communication hole 124 of the elevating duct 120. Therefore, the conditioned air that has passed through the branch duct 113 is not introduced into the elevating duct 120, and the conditioned air is not supplied from the outlet 125. On the other hand, the lifting duct 120 protruding upward from the floor surface 100F has a space between the lower surface of the front seat FrS and the floor surface 100F in front of and behind the lifting duct 120 behind the front seat FrS. Can be partitioned. For this reason, it is possible to suppress the conditioned air in the front seat FrS from passing from the front space side of the lifting duct 120 to the rear space side.

<effect>
According to said air conditioning duct structure, the following effects can be produced according to the necessity of air conditioning at the rear seat and the presence or absence of passengers at the rear seat.

  (1) At the ventilation position, it is easy to adjust the direction and volume of the conditioned air to the rear seat side. At the ventilation position, the elevating duct 120 is raised and protruded from the upper opening 133 of the floor surface 100F so that the air outlet 125 is exposed above the floor surface 100F. This is because there is no shield. In particular, it is preferable to blow warm air toward the feet of the rear seat occupant during heating.

  (2) At the ventilation position, since the air outlet 125 opens rearward and does not open upward, it is difficult for foreign matter to enter the elevating duct 120 from the air outlet 125.

  (3) In the storage position, by storing the elevating duct 120 in the duct storage cylinder 130, a member protruding on the floor surface 100F can be eliminated. Therefore, it is easy to secure the foot space for the rear seat occupant and the loading space. Of course, if there is no protruding member on the floor surface 100F, it is not necessary to take steps on the rear end of the air-conditioning duct or take measures for its appearance.

  (4) In the storage position, the inlet 131 of the duct storage cylinder 130 is blocked by the duct side wall 121 above the communication hole 124. Therefore, the conditioned air that has passed through the branch duct 113 is not supplied from the outlet 125, and it is not necessary to supply unnecessary conditioned air to the rear seat side.

  (5) At the shielding position, the elevating duct 120 is made to protrude larger than the floor surface 100F, so that the space between the lower surface of the front seat FrS and the floor surface 100F has a space in front of and behind the elevating duct 120. Can be partitioned. Therefore, it can suppress that the air-conditioning wind of front seat FrS escapes from the front space side of the raising / lowering duct 120 to the back space side, and can improve the air-conditioning efficiency of front seat FrS.

  (6) At the shielding position, the conditioned air that has passed through the branch duct 113 is not introduced into the elevating duct 120, and the conditioned air is not supplied from the outlet 125. Therefore, it is not necessary to supply unnecessary air-conditioning air to the rear seat side.

<Modification>
In the above-described embodiment, the configuration using the duct housing cylinder 130 has been described, but the duct housing cylinder 130 may be omitted. When the duct housing cylinder 130 is not used, the elevating duct 120 is fitted directly into the duct opening 100H. In the ventilation position, the rear end opening 110H of the underfloor duct 110 (branch duct 113) faces the communication hole 124 of the elevating duct 120. In the storage position, the rear end opening 110 </ b> H of the underfloor duct 110 is blocked by the duct side wall 121 above the communication hole 124. Then, the rear end opening 110 </ b> H of the underfloor duct 110 is blocked by the duct side wall 121 below the communication hole 124.

100 Car interior IP Instrument panel FrS Front seat Sc Seat cushion Sb Seat back AC Air conditioning unit AC1 DEF outlet AC2 Face outlet AC3 Foot outlet 100F Floor surface 100H Duct opening Fb Floor base panel Fc Floor carpet 110 Under floor Duct 110H Rear end opening 111 Duct body 113 Branch duct 115 Outlet 120 Elevating duct 121 Duct side wall 122 Top surface 123 Bottom surface 124 Communication hole 125 Outlet port 126 Air guide plate 130 Duct storage cylinder 131 Inlet port 132 Storage side wall 133 Upper opening 134 Bottom surface

Claims (1)

A duct arranged below the floor surface of the passenger compartment, and an underfloor duct for guiding the conditioned air of the air conditioning unit from the front of the passenger compartment through the rear end opening to the rear seat side,
A duct opening formed in the floor surface;
Elevating duct fitted to the duct opening so as to be movable up and down, and having a duct side wall and an upper surface closing the upper part of the duct side wall,
The duct side wall of the elevating duct is
A communication hole that opens to the front or side of the vehicle compartment;
A blower opening that opens on the rear side of the passenger compartment above the communication hole;
The lifting position of the lifting duct is
In the state where the outlet is exposed above the floor surface, a ventilation position where the underfloor duct and the elevating duct communicate with each other through the rear end opening and the communication hole,
An air conditioning duct structure for an automobile having an upper surface positioned below the floor surface and a storage position where the rear end opening is closed by the duct side wall above the communication hole.

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