JP2007038746A - Air conditioner for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress ventilation resistance of warm air flowing from a heat exchanger for heating to a foot blow-out passage without causing an increase of the number of parts. <P>SOLUTION: An inlet 21 of the foot blow-out passage 18 to face to an air mix chamber 14 and having at least a part opened to be opposed to a ventilation rear surface 7b of the heat exchanger 7 is provided in an upper part of a warm air guide wall 30 for guiding warm air ventilating the heat exchanger 7 toward the air mix chamber 14. A foot door 18D for opening/closing the inlet 21 of the foot blow-out passage 18 is constituted as a planar rotary door rotating with a rotary shaft 18c provided in the vicinity of the heat exchanger 7 as a center, guides warm air of a warm air passage 12 toward the air mix chamber 14 at the time of closing the inlet 21 of the foot blow-out passage 18, and guides warm air of the warm air passage 12 toward the inlet 21 the foot blow-out passage 18 and the air mix chamber 14 by intersecting the warm air passage 12 at the time of opening the inlet 21 of the foot blow-out passage 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner for automobiles.

  A conventional automobile air conditioner is disclosed in Patent Document 1, for example. This automotive air conditioner includes a heating air exchanger (23) in which a heating heat exchanger (23) is arranged and a warm air passage (H) through which warm air heated by the heating heat exchanger (23) flows, and a heating heat exchanger (23). A bypass passage (C) for bypassing the cool air and bypassing the air, an air mix door (28) for adjusting the air volume ratio between the hot air passage (H) and the bypass passage (C), the hot air passage (H) and the bypass passage And a plurality of outlet passages branched from the junction (C) toward the passenger compartment. The outlet passage includes a defroster outlet passage (25a), a vent outlet passage (25b), and a foot outlet passage (F). The foot outlet passage (F) branches into a front foot outlet passage (25c) and a rear foot outlet (25d).

  In the middle of the hot air passage (H), a communication port (31) communicating with the foot blowing passage (F) is provided, and the communication port (31) rotates in the foot blowing passage (F). A door (36) for opening and closing the communication path (31) is provided. The foot outlet passage (F) is provided with a door (37) for opening and closing the foot outlet passage (F) downstream of the communication port (31).

Therefore, when it is desired to blow warm air from the foot blowing passage (F), if the foot blowing passage (F) is opened by the door (37) and the communication port (31) is opened by the door (36), the warm air passage (H) The hot air from the air flows as it is to the foot blowing passage (F) as a shortcut to the confluence portion of the cold air and the hot air. Thereby, the ventilation resistance of the warm air which goes to a foot blower outlet (25a, 25b) can be lowered | hung.
Japanese Patent Laid-Open No. 11-48748

  However, in the prior art, when the warm air from the warm air passage (H) is directly passed to the foot blowing passage (F), it is necessary to use the two doors (36, 37), so the number of parts is large. There is also a drawback that the control becomes complicated. In the description so far, the reference numerals in parentheses follow the reference numerals in Patent Document 1.

  In view of the above circumstances, an object of the present invention is to provide an automotive air conditioner that can reduce the resistance of warm air to the foot outlet passage while reducing the number of parts.

According to the first aspect of the present invention, there is provided a bypass passage for flowing cold air that bypasses the heat exchanger for heating, a flow of air passing through the heat exchanger for heating with the heating heat exchanger disposed therein, and the heat exchanger for heating. A hot air passage whose downstream side is curved toward the bypass passage, cold air flowing through the bypass passage, an air mix door for adjusting the flow rate of the hot air flowing through the hot air passage, and these bypass passages An air mix chamber that mixes hot air and cold air at a position where it joins the hot air passage, and a defroster outlet passage, a vent outlet passage, and a foot outlet passage that branch from the air mix chamber and head toward the passenger compartment. Automatic air that mixes cold air from the bypass passage and hot air from the hot air passage in an air mix chamber to produce air-conditioning air at a predetermined temperature and blows this air-conditioning air into the passenger compartment A use air-conditioning system,
A hot air guide wall is provided opposite to the ventilation rear surface of the heating heat exchanger and guides the warm air that has passed through the heating heat exchanger toward an air mix chamber, and is provided at an upper portion of the hot air guide wall. An inlet of the foot blowing passage is provided so as to face the air mix chamber and at least a part thereof opens at a position facing the ventilation rear surface of the heat exchanger for heating, and a foot door for opening and closing the foot blowing passage inlet is provided. The foot door is configured as a plate-like rotary door that rotates about a rotating shaft provided on the heating heat exchanger side across the hot air passage, and when the foot outlet passage is closed. The hot air in the hot air passage is guided toward the air mix chamber, and the hot air in the hot air passage intersects with the hot air passage when the foot blowing passage entrance is opened. It is characterized in that the guide toward the foot air passage inlet even without.

  According to the first aspect of the present invention, when the door at the entrance of the foot outlet passage is opened, the hot air flowing through the hot air passage flows through the foot outlet passage by shortcutting the air mix chamber. Ventilation resistance of the flowing warm air decreases. When the door at the entrance of the foot blowing passage is closed, the warm air flowing through the warm air passage is directly directed to the air mix chamber and blown out from other blowing passages (defroster blowing passage and / or vent blowing passage).

  According to the present invention, according to the present invention, the opening position of the foot blowing passage and the structure of the door that opens and closes the foot blowing passage, while having a structure in which the resistance to warm air flowing from the warm air passage to the foot blowing passage is lowered. Thus, there is no need to control the opening and closing of the foot outlet passage as in the prior art (for example, Patent Document 1), the number of parts is reduced, and the opening and closing control is simplified.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First Embodiment: FIGS. 1 to 6 show a first embodiment of the present invention. First, the schematic structure of the air conditioner will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view showing an automobile air conditioner according to the first embodiment, FIG. 2 is a sectional view showing a door control position and a wind flow in the vent mode of the automobile air conditioner, and FIG. FIG. 4 is a sectional view showing the control position of the door and the flow of wind during the vent / foot (bilevel mode) of the air conditioner. FIG. 4 is a cross section showing the control position of the door and the flow of wind during the foot mode of the automotive air conditioner FIG. 5 is a sectional view showing the door control position and wind flow during the differential / foot operation of the vehicle air conditioner. FIG. 6 is the door control position and wind flow during the defroster mode of the vehicle air conditioner. FIG. 7 is a schematic perspective view of a foot door of the automotive air conditioner.

  An automotive air conditioner according to this embodiment includes an intake box (not shown) that selectively introduces internal and external air, a blower (not shown) that sends air from the intake box downstream, and air from the blower And an air conditioning unit 1 that regulates the temperature of the air and blows it out into the passenger compartment.

  The air conditioning unit 1 is disposed at the center in the vehicle width direction in front of the instrument panel at the front end of the passenger compartment. The air conditioning unit 1 is configured by arranging a filter F, a heat exchanger 7 for heating, a heat exchanger 5 for cooling, and the like in an air conditioning case 2 formed by an air passage. The air conditioning case 2 has an inlet 4 as an upstream end of the air passage, and air outlets 16, 17, 23, and 25 as downstream ends of the air passage. A blower duct (not shown) is connected to each blower outlet 16, 17, 23, 25, and the temperature-controlled air in the air conditioning case 2 is blown out toward a predetermined position in the passenger compartment through the connection duct. It has become.

  Next, the structure of the air conditioning unit 1 will be described in more detail.

  In the air conditioning case 2, an evaporator 5 as a cooling heat exchanger, an air mix door 6 as a temperature adjusting means, and a heater core 7 as a heating heat exchanger are arranged.

  The evaporator 5 as a cooling heat exchanger cools and dehumidifies the air that is ventilated by circulating a low-temperature and low-pressure refrigerant inside. The evaporator 5 is arranged substantially vertically so as to ventilate from the front to the rear of the vehicle.

  On the other hand, the heater core 7 as a heat exchanger for heating heats the air heat that is ventilated by circulating a high-temperature heating medium such as engine cooling water inside. The heater core 7 is set to have a smaller ventilation area and smaller height than the evaporator 5, and is disposed opposite to the lower portion of the evaporator 5 on the vehicle rear side of the evaporator 5. The heater core 7 is arranged in a forward tilt posture.

  The downstream side of the evaporator 5 branches into a warm air passage 12 and a bypass passage 13. The warm air passage 12 is a passage that heats the cold air that has passed through the evaporator 5 by passing it through the heater core 7, and the bypass passage 13 bypasses the cold air that has passed through the evaporator 5 and bypasses the heater core 7, and circulates it as cold air. It is a passage. The inlet 12a of the hot air passage 12 and the inlet 13a of the bypass passage 13 are arranged vertically. An air mix door 6 as a temperature adjusting means is disposed over the inlets 12a and 13a, and the air volume ratio distributed to the bypass passage 13 and the hot air passage 12 can be adjusted by the air mix door 6. ing. The air mix door 6 of this embodiment is a plate-like sliding door that bulges in a circular arc shape on the downstream side, and slides up and down over both the inlets 12a and 13a to both the passages 12 and 13. Adjust the air flow ratio.

  The bypass passage 13 is formed in a substantially straight shape toward the rear obliquely upward direction, that is, toward the vent outlet passage 17. On the other hand, the warm air passage 12 is formed such that the upstream side of the heater core 7 faces obliquely downward and the downstream side of the heater core 7 is curved toward the upper bypass passage 13 by the warm air guide wall 30. The hot air guide wall 30 is curved and provided with a bottom wall portion 30a, a vertical wall portion 30c, and an upper portion 30e. The bottom wall portion 30a is provided along the lower end portion of the heater core 7, and smoothly follows the vertical wall portion 30c via the inclined portion 30b. The vertical wall portion 30c is disposed so as to be substantially parallel to the rear face 7b of the heater core 7 and its upper portion 30e is slightly wound toward the upper end side of the heater core 7 and is directed obliquely upward to the front.

  A confluence portion downstream of the bypass passage 13 and the hot air passage 12 is set as an air mix chamber 14 for mixing cold air and hot air. A plurality of outlet passages 16 to 18 are branched from the air mix chamber 14. The outlet passages 16 to 18 of this embodiment are a defroster outlet passage 16, a vent outlet passage 17, and a foot outlet passage 18.

  Next, each blowing passage 16-18 is demonstrated in detail.

  The defroster outlet passage 16 branches from the air mix chamber 14 upward. The defroster outlet passage 16 is provided with an opening / closing door 16D, and the defroster outlet passage 16 can be opened and closed by the opening / closing door 16D.

  The vent blowing passage 17 branches from the air mix chamber 14 toward the rear of the vehicle and blows the conditioned air toward the front seat passenger's upper body. The vent blowing passage 17 branches upward from the air mix chamber 14 to the side window. And a side vent outlet passage for blowing out the conditioned air toward. The vent blow passage 17 is provided with an open / close door 17D, and the blow passage 17 can be opened and closed by the open / close door 17D.

  The foot outlet passage 18 extends downward from the vicinity of the boundary between the air mix chamber 14 and the hot air passage 12, and includes a front foot outlet 23 directed toward the front seat occupant foot and a rear foot outlet 25 directed toward the rear seat occupant foot. And. The inlet 21 of the foot blowing passage 18 is open to the upper portion 30e of the hot air guide wall 30 and faces the air mix chamber 14, and a part thereof (substantially lower half in this example) is the rear ventilation surface 7b of the heater core 7. It is opened at a position opposite to. Strictly speaking, a part of the foot blowing passage entrance 21 interferes with the ventilation rear surface 7b of the heater core 7 (that is, the foot blowing passage entrance 21 extends from the direction Y orthogonal to the ventilation surfaces 7a and 7b of the heater core 7). It opens in the projected plane of the heater core 7 as seen. Therefore, both the warm air from the warm air passage 12 and the cold air from the bypass passage 13 can flow into the foot blowing passage 18.

  A foot door 18D for opening and closing the inlet 21 is provided at the foot outlet passage 21. The foot door 18D rotates about a rotation shaft 18c provided at the upper rear portion of the heater core 7, and is configured as a plate-like rotary door. The foot door 18D has a plate surface facing the rotary shaft 18c, and is formed in a circular arc shape that is convex toward the rotary shaft 18c. 2, the foot door 18D is flush with the warm air guide wall 30 when the foot outlet passage 21 is closed, and directs the warm air from the warm air passage 12 to the air mix chamber 14 and / or the bypass passage 13. To guide. As shown in FIGS. 3 and 4, the foot door 18D intersects the hot air passage 12 so as to block the hot air passage 12 when the foot outlet passage 21 is opened, and at least the hot air from the hot air passage 12 is blown out. The guide is directed toward the passage entrance 21. FIG. 7 is a perspective view showing a schematic structure of the foot door 18D, and reference numeral 19 denotes a pair of substantially triangular connecting plates that connect the foot door 18D and its rotating shaft 18c.

"Action"
The flow of the conditioned air in the main blowing mode of the automotive air conditioner configured as described above will be described with reference to FIGS.

Vent blowing mode (Figure 2)
First, the vent blowing mode will be described with reference to FIG. The vent blowing mode is a mode for blowing conditioned air from the vent blowing passage 17. Specifically, the vent blow passage 17 is fully open, the defroster blow passage 16 is fully closed, and the foot blow passage 18 is fully closed by adjusting the opening of the open / close doors 16D to 18D.

  In this vent blowing mode, the air mix door 6 causes the hot air passage 12 to be almost fully closed and the bypass passage 13 to be almost fully open, so that the air volume ratio between the cold air and the hot air is around 10: 0 to 8: 2. It is in the set full cool mode.

  Thereby, almost all of the air that has passed through the evaporator 5 flows into the air mix chamber 14 through the bypass passage 13 and is blown out into the vehicle compartment through the vent blowout passage 17. Part of the air that has passed through the evaporator 5 is heated in the hot air passage 12 to become hot air, and is mixed with the cold air in the air mix chamber 14.

  Here, the foot door 18D is set to the fully closed position. As a result, the foot door 18D is flush with the warm air guide wall 30 and guides the warm air from the warm air passage 12 as it is toward the air mix chamber.

Bi-level blowing mode (Fig. 3)
Next, the bi-level blowing mode will be described with reference to FIG. The bi-level blowing mode is a mode in which conditioned air is blown from both the vent blowing passage 17 and the foot blowing passage 18. Specifically, the vent blowing passage 17 is half-opened, the defroster blowing passage 16 is fully closed, and the foot blowing passage 18 is half-opened by adjusting the opening of the open / close doors 16D to 18D.

  In the bi-level blowing mode, the air mix door 6 is set to an air mix mode in which the warm air passage 12 is set to be substantially half open and the bypass passage 13 is set to be substantially half open.

  As a result, the air that has passed through the evaporator 5 flows approximately halfway through the bypass passage 13 and the hot air passage 12, whereby the cold air from the bypass passage 13 and the hot air from the hot air passage 12 are mixed in the air mix chamber 14. After that, the air is blown into the passenger compartment through the vent blow passage 17 and the foot blow passage 18.

  Here, the foot door 18D is set at a substantially intermediate position between the fully open position and the fully closed position. As a result, the foot door 18D crosses the hot air passage 12 so as to block the outlet of the hot air passage 12 (substantially orthogonal), and the hot air from the hot air passage 12 is sent under the foot outlet passage 21 and the bypass passage 13. While diverting toward the side portion, the cold air from the bypass passage 13 is guided to the foot outlet passage inlet 21 as it is along the upper surface thereof. The warm air that has flowed to the lower portion of the bypass passage 13 flows into the vent outlet passage 17 together with the cold air from the bypass passage 13.

Foot blowing mode (Figure 4)
Next, the foot blowing mode will be described with reference to FIG. The foot blowing mode is a mode for blowing conditioned air from the foot blowing passage 18. Specifically, the vent blow passage 17 is fully closed, the defroster blow passage 16 is fully closed, and the foot blow passage 18 is fully opened by adjusting the opening of the open / close doors 16D to 18D.

  In this foot blowing mode, the air mix door 6 causes the hot air passage 12 to be almost fully opened and the bypass passage 13 to be almost fully closed, so that the air volume ratio between the cold air and the hot air is around 0:10 to 2: 8. The set full hot mode is set.

  As a result, almost all of the air that has passed through the evaporator 5 circulates through the hot air passage 12 and flows into the foot outlet passage 18 from the inlet 21 of the foot outlet passage, and the front foot outlet 23 and the rear foot of the foot outlet passage 18. The air is blown out from the air outlet 25 into the passenger compartment. The cool air that has flowed into the air mix chamber 14 from the bypass passage 13 flows into the foot blowing passage 18 from the inlet 21 of the foot blowing passage 18.

  Here, the foot door 18D is set at the fully open position, so that it is located closer to the bypass passage inlet 13a than the above-described half-open position (see FIG. 3), and also compared with the above-described half-open position (see FIG. 3). In addition, the wind passing through the warm air passage 12 is more likely to enter the foot blowing passage 21. At this time, the plate surface of the foot door 18D is directed to the foot outlet passage entrance 21 side, that is, the rear obliquely downward direction. Thereby, the foot door 18D guides all the warm air from the warm air passage 12 to the foot outlet passage entrance 21. The cold air flows from the bypass passage 13 into the foot outlet passage inlet 21 so as to be attracted to the flow of the hot air.

Differential / foot blowing mode (Figure 5)
Next, the differential / foot blowing mode will be described with reference to FIG. The differential / foot blowing mode is a mode in which conditioned air is blown from the defroster blowing passage 16 and the foot blowing passage 18. Specifically, the vent blow passage 17 is fully closed, the defroster blow passage 16 is half open, and the foot blow passage 18 is half open by adjusting the opening of the open / close doors 16D to 18D.

  In the differential / foot blowing mode, the hot air passage 12 is fully opened and the bypass passage 13 is fully closed by the air mix door 6, and the full hot mode is set in which only the warm air is blown out.

  As a result, all of the air that has passed through the evaporator 5 flows through the warm air passage 12 and is heated, and then is blown out from the foot blow passage 18 and the defroster blow passage 16 into the vehicle interior.

  Here, the foot door 18D is set at a substantially intermediate position between the fully open position and the fully closed position as in the case of FIG. 3, and intersects (substantially orthogonal) the hot air passage 12 so as to block the outlet of the hot air passage 12. Then, the warm air from the warm air passage 12 is diverted toward the foot blowing passage entrance 21 and the lower portion of the bypass passage 13. The warm air that has flowed into the foot blowing passage 18 is blown into the vehicle interior through the front foot blowout port 23 and the rear foot blowout port 25, while the warm air that has flowed into the lower portion of the bypass passage 13 is blown into the air mix chamber 14. Through the defroster outlet passage 16.

Defroster blowing mode (Fig. 6)
Next, the defroster blowing mode will be described with reference to FIG. The defroster blowing mode is a mode for blowing conditioned air from the defroster blowing passage 16. Specifically, the vent blow passage 17 is fully closed, the defroster blow passage 16 is fully opened, and the foot blow passage 18 is fully closed by adjusting the opening of the open / close doors 16D to 18D. In this defroster blowing mode, the temperature control mode is set to the full hot mode. That is, the air mix door 6 is set so that the warm air passage 12 is fully opened and the bypass passage 13 is fully closed, and only warm air is blown out.

  Thereby, the warm air flowing into the air mix chamber 14 from the warm air passage 12 is blown out into the vehicle compartment through the defroster blow passage 16.

  Here, the foot door 18D is set at the fully closed position as in the case of FIG. 2, and is flush with the warm air guide wall 30 to guide the warm air from the warm air passage 12 to the air mix chamber 14 as it is.

"effect"
As described above, the automotive air conditioner according to the present embodiment has a foot that opens to the upper portion 30e of the hot air guide wall 30 so as to face the air mix chamber 14 and to face at least a part of the rear ventilation surface 7b of the heater core 7. A plate-like rotary door provided with an inlet 21 of the blow-out passage 18, and a foot door 18D for opening and closing the foot blow-out passage inlet 21 rotates around a rotary shaft 18 c provided on the heater core 7 side across the hot air passage 12. The warm air in the warm air passage 12 is guided toward the air mix chamber 14 when the foot outlet passage 21 is closed, and the warm air crosses the hot air passage 12 when the foot outlet passage 21 is opened. The warm air in the passage 12 is guided toward at least the foot outlet passage entrance 21.

  Therefore, when the door 18D of the inlet 21 of the foot blowing passage 18 is opened, the warm air flowing through the warm air passage 12 flows into the foot blowing passage 18 by shortcutting the air mix chamber 14, and therefore, the foot blowing passage 18 extends from the hot air passage 12. The resistance to warm air flowing to the On the other hand, when the door 18D at the inlet 21 of the foot outlet passage 18 is closed, the hot air flowing through the hot air passage 12 goes directly to the air mix chamber 14 and from the other outlet passages (defroster outlet passage 16 and / or vent outlet passage 17). Blown out.

  That is, according to the automobile air conditioner of the present embodiment, the air blowing resistance of the hot air flowing from the hot air passage 12 to the foot blowing passage 18 is reduced. There is no need for opening / closing control by a plurality of doors, the number of parts is reduced, and opening / closing control is simplified.

  Note that the present invention is not construed as being limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

FIG. 1 is a longitudinal sectional view of an automotive air conditioner according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a door control position and a wind flow when the vehicle air conditioner is in a vent mode. FIG. 3 is a cross-sectional view showing a door control position and wind flow when the vehicle air conditioner is vented / footed (bi-level mode). FIG. 4 is a cross-sectional view showing a door control position and a wind flow in the foot mode of the vehicle air conditioner. FIG. 5 is a cross-sectional view showing the control position of the door and the flow of wind during differential / foot operation of the air conditioner for the automobile. FIG. 6 is a cross-sectional view showing the door control position and the wind flow in the defroster mode of the automotive air conditioner. FIG. 7 is a schematic perspective view of a foot door of the vehicle air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air conditioning unit 2 ... Air conditioning case 4 ... Inlet 5 ... Evaporator (cooling heat exchanger)
6 ... Air mix door 7 ... Heater core (heat exchanger for heating)
7a: Ventilation front surface 7b: Ventilation rear surface 12 ... Warm air passage 12a ... Warm air passage inlet 13 ... Bypass passage 13a ... Bypass passage inlet 14 ... Air mix chamber 16 ... Defroster outlet passage 16C ... Open / close door 17 ... Vent outlet passage 17C ... Open / close Door 18 ... foot outlet passage 18C ... foot door 21 ... foot outlet passage entrance 23 ... foot outlet passage outlet (front foot outlet)
25 ... Foot outlet passage exit (rear foot outlet)
30 ... Warm air guide wall 30a ... Bottom wall part 30b Inclined part 30c ... Vertical wall part (opposing part)
30e ... upper part Y ... orthogonal direction (ventilation direction)
F ... Filter

Claims (1)

A bypass passage (13) for flowing cold air to bypass the heat exchanger (7) for heating;
The heating heat exchanger (7) is arranged to flow a wind passing through the heating heat exchanger (7), and the downstream side of the heating heat exchanger (7) is directed to the bypass passage (13). A curved hot air passage (12);
An air mix door (6) for adjusting the flow rate of the cold air flowing through the bypass passage (13) and the hot air flowing through the hot air passage (12);
An air mix chamber (14) for mixing hot air and cold air at a joining position of the bypass passage (13) and the hot air passage (12);
A defroster outlet passage (16), a vent outlet passage (17) and a foot outlet passage (18) branched from the air mix chamber (14) toward the passenger compartment;
With
Cold air from the bypass passage (13) and hot air from the hot air passage (12) are mixed in an air mix chamber (14) to produce conditioned air at a predetermined temperature, and the conditioned air is blown into the vehicle interior. An air conditioner,
A hot air guide wall that is arranged to face the rear ventilation surface (7b) of the heating heat exchanger (7) and guides the hot air that has passed through the heating heat exchanger (7) toward the air mix chamber (14). (30)
The upper part (30e) of the hot air guide wall (30) faces the air mix chamber (14) and at least a part thereof faces the ventilation rear surface (7b) of the heating heat exchanger (7). An inlet (21) of the foot outlet passage (18) is provided so as to open,
A foot door (18D) for opening and closing the foot outlet passage entrance (21) is provided,
The foot door (18D) is configured as a plate-like rotary door that rotates around a rotating shaft (18c) provided on the heating heat exchanger (7) side across the hot air passage (12). And the warm air in the warm air passage (12) is guided toward the air mix chamber (14) when the foot blowing passage inlet (21) is closed, and the foot blowing passage inlet (21) is opened when the foot blowing passage inlet (21) is opened. An automotive air conditioner that crosses the hot air passage (12) and guides the hot air in the hot air passage (12) toward at least the foot outlet passage entrance (21).

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