JP2000071745A - Air conditioning apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the conditioned air volume blown into the cabin from failing to reach the target by disposing a hot air bypass passage in the support shaft side of the A/M door, while miniaturizing the heater case. SOLUTION: A hot air bypass passage 16 is disposed in the support shaft side of an A/M door 3 for guiding, in the F/D mode or DEF mode, hot air heated during the air passes a heat exchanger for heating, a heater core for instance, directly to a DEF blowout port 13 with by-passing an air passage 15 having a first air mixing chamber 17. This arrangement enables a large sectional area of the ventilation path in the upstream side of the heat exchanger for heating. Further, a communication port 19 that intercommunicate the air passage 15 and the hot air bypass passage 16 can be opened and closed by means of a face door 23 for opening/closing a face blowout port 12. Accordingly, reduction in the number of part items and miniaturization of a heater unit 1 are achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air bypass passage in a required outlet mode by opening or closing a communication passage connecting a air passage and a hot air bypass passage with a face door. The present invention relates to an air conditioner for a vehicle in which air flows.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. Hei 1-220214 discloses a heater case 10 as shown in FIG.
1, a first substantially rectangular shape communicating the outlet of the heating heat exchanger 102 such as a heater core and the foot outlet 103,
A heater unit (conventional technology) 100 provided with second air passages 104 and 105 has been proposed. The bypass air (cold air) distributed by the air mix door 106 joins the first and second air passages 104 and 105, and the face air outlet 107 and the defroster 107 are located downstream of the first air passage 104. Outlet 109
Are opened, and a foot outlet 103 is opened at a downstream portion of the second air passage 105 communicating with the first air passage 104.

[0003] In the heater case 101, the outlet of the heating heat exchanger 102 and the foot outlet 103 are directly connected in parallel with the first and second air passages 104 and 105, and the face outlet 107 is provided. And defroster outlet 10
A hot air bypass passage 110 that bypasses 9 is provided. The hot air bypass passage 110 is configured to be opened and closed by a foot door 111 for opening and closing the foot outlet 103. In addition, 112, 113
First and second air passages 104, 1
This is a partition wall for partitioning the area 05 from the fan-shaped opening (air passage) 114 and the installation site of the heating heat exchanger 102.

Then, hot air and cold air are mixed in the first air passage 104 and the mixed air is supplied to the face air outlet 1.
07 or the defroster outlet 109 and the foot outlet 103, and a portion of the warm air immediately after passing through the heating heat exchanger 102 is not mixed with the cool air to the foot outlet 103 via the hot air bypass passage 110. By guiding, the occupant's head cold foot feeling is improved.

[0005]

However, in the conventional heater unit 100, the second air passage 105 and the hot air bypass passage 110 are connected to the air mix door 106.
Is provided on the opposite side to the support shaft (shaft) side, that is, on the outer peripheral side of the fan-shaped opening 114 via the partition wall 113, there is a problem that the heater case 101 becomes large.

In order to solve this problem, if the size of the heater case 101 is the same as that of the heater case 101 without the second air passage 105 and the hot air bypass passage 110, the effective use of the heating heat exchanger 102 is prevented. It is necessary to reduce the heat exchange area and the size of the air mix door 106.

For this reason, the heater case 1
Fan-shaped opening (ventilation path) 114 for allowing cool air to flow into 01
Is reduced, the amount of conditioned air flowing through the heater case 101 is reduced, and the amount of air blown out from each outlet into the vehicle compartment may not reach the target air amount.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle air conditioner in which a hot air bypass passage is provided on a support shaft side of an air mixing door so that the amount of conditioned air blown into a vehicle cabin does not reach a target air flow. It is intended to provide a device. It is another object of the present invention to provide a vehicle air conditioner capable of reducing the size of a heater case.

[0009]

According to the first aspect of the present invention, the hot air heated when passing through the heating heat exchanger bypasses the air passage and passes through the second outlet or the third outlet. By providing the hot air bypass passage leading to the outlet on the support shaft side of the air mixing door, the effective heat exchange area of the heat exchanger for heating and the size from one end to the other end of the air mixing door can be increased. Thereby, the passage cross-sectional area of the ventilation passage on the upstream side of the air of the heating heat exchanger 4 can be increased, so that the amount of air flowing through the heater case can be increased. For this reason, the air volume of the conditioned air blown out from each of the first to third air outlets into the vehicle compartment can reach the target air volume.

According to the second aspect of the present invention, the hot air bypass passage and the air passage are provided in parallel in the width direction of the heater case, so that the hot air bypass passage and the air passage are provided inside the heater case. Even when it is formed, it is possible to prevent the heater case from being enlarged in the thickness direction. This makes it possible to reduce the size of the heater case in the thickness direction.

According to the third and fourth aspects of the invention, the air passage and the hot air bypass passage are partitioned by the partition wall, and the hot air bypass passage is provided on one side or both sides in the width direction of the heater case. By providing the heater case so as to be adjacent to the air passage, it is possible to prevent the heater case from increasing in the thickness direction. This makes it possible to reduce the size of the heater case in the thickness direction.

According to the fifth aspect of the present invention, the hot air inlet on the heating heat exchanger side of the hot air bypass passage is provided near the outlet of the heating heat exchanger, so that the heating heat exchanger has Since the warm air flowing out of the outlet can flow directly into the warm air bypass passage, the temperature of the conditioned air blown into the passenger compartment from the second outlet or the third outlet can be easily increased.

According to the invention, the air passage and the hot air bypass passage communicate with each other, and the communication passage for joining the conditioned air flowing through the air passage with the warm air from the hot air bypass passage is provided. In addition, a dedicated communication passage opening / closing door is opened and closed by opening and closing a second air outlet switching door that opens and closes a second air outlet for blowing out conditioned air to the occupant's head and chest. Compared with a vehicle air conditioner having a door, the number of components can be reduced, and the heater case can be reduced in size by providing a dedicated communication passage opening / closing door.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of Embodiment] FIGS. 1 to 6 show an embodiment of the present invention. FIG. 1 is a diagram showing the position of each door in a DEF mode, and FIG. It is the figure which showed the heater unit of the air conditioner for vehicles.

The air conditioner for a vehicle according to the present embodiment has an inside / outside air switching means (not shown) for switching a suction port mode for sucking either outside air (hereinafter referred to as outside air) or inside air (hereinafter referred to as inside air). ), A cooler unit having a built-in heat exchanger for cooling such as an evaporator, a centrifugal blower for generating an airflow toward a vehicle cabin, and a heater unit 1 having a built-in heat exchanger 4 for heating such as a heater core. ing. The heater unit 1 is a center-installed air conditioning (A / C) unit provided in the front center portion of the vehicle interior of the vehicle. The heater unit 1 mixes cold air and hot air to produce air-conditioned air at a temperature required by a vehicle occupant. The air mix temperature control system that produces

The centrifugal blower includes a scroll case 5 connected to the cooler unit of the cooler unit on the downstream side of the air.
It comprises a centrifugal fan rotatably arranged in the scroll case 5 and a blower motor for driving the centrifugal fan to rotate. A bell mouth-shaped suction port 6 for sucking outside air or inside air from the inside / outside air switching means into the scroll case 5 is formed at the center of the scroll case 5.

The heater unit 1 has a heater case 2 connected to the scroll case 5 on the downstream side of the air. Inside the heater case 2, an air mix (A / M) door 3, a heating heat exchanger 4, and an outlet switching means are provided from the air upstream to the air downstream.

The A / M door 3 has a resin door portion on both sides to which a packing such as urethane resin is adhered, and a round member integrally formed at one end of the resin door portion and rotatably supported by the heater case 2. This is a one-sided support plate door configured with a rod-shaped support shaft (shaft) and the like. This A / M door 3
From MAX COOL (fully closed) to MAX HOT (fully open)
By adjusting the amount of air passing through the heating heat exchanger 4 and the amount of air bypassing the heating heat exchanger 4, the temperature of the conditioned air blown into the vehicle compartment is adjusted. The dashed line shown in FIG. 1 indicates the operating range of the A / M door 3.

When the A / M door 3 is driven by an actuator such as a servomotor, the opening is determined by controlling the actuator by an air conditioning control device (air conditioner ECU) as air conditioning control means. Further, the opening of the A / M door 3 may be determined according to the operation position of a manual operation means such as a temperature control lever.

The heating heat exchanger 4 is installed below the heater case 2 in the figure, with the inlet side facing upward in the figure and the outlet side facing downward in the figure. Then, the engine cooling water warmed by the engine mounted on the vehicle flows into the heating heat exchanger 4 through the pipe 10. The heating heat exchanger 4 is a hot water heater (heater core) that heats the air by exchanging heat between the flowing engine cooling water and passing air.

Here, on the most downstream side of the heater case 2, a foot (FOOT) outlet 11 as a first outlet for blowing out conditioned air toward the foot of the vehicle occupant, and a head-and-chest ( FACE outlet 1 as a second outlet for blowing air-conditioned air toward the upper body
2. Defroster (DEF) as a third outlet for blowing conditioned air toward the inner surface of the windshield
The outlet 13 and the like are open.

The FACE outlet 12 and the DEF outlet 13 are open on the upper side of the heater case 2 in the figure, and the FOOT outlet 11 is below the FACE outlet 12 and the DEF outlet 13 and It is open at the lower side of the heater case 2 in the figure. Further, the inside of the heater case 2 is divided into an air passage 15 and a hot air bypass passage 16 by a partition wall 14 integrally formed on the inner wall surface of the heater case 2.

As shown in FIG. 2, the air passage 15 is provided with two partition walls 14 provided at the center of the heater case 2.
It is formed between them. The air passage 15 has a first air mixing chamber 17 that mixes hot air heated when passing through the heat exchanger 4 for heating and cool air that bypasses the heat exchanger 4 for heating. The air-conditioned air mixed with the hot air and the cold air in the air mix chamber 17 is supplied to the FACE outlet 12,
It is a central ventilation passage (first air passage) leading to the DEF outlet 13 and the FOOT outlet 11.

As shown in FIG. 2, the hot air bypass passage 16 is formed between the inner wall surface of the side wall of the heater case 2 on the support shaft side of the A / M door 3 and the two partition walls 14, that is, the width of the air passage 15. It is formed on each side of the direction. The hot air bypass passage 16 directly guides the heated air heated when passing through the heating heat exchanger 4 to the DEF outlet 13 and further to the FOOT outlet 11 through the air passage 15. (Second air passage).

The inlet of the hot air bypass passage 16 is
The outlet of the hot air bypass passage 16 is open near the side wall surface of the scroll case 5 and near the DEF outlet 13. In addition, between the outlet of the hot air bypass passage 16 and the DEF outlet 13, the high-temperature hot air that has passed through the hot air bypass passage 16 and the conditioned air that has been adjusted to an appropriate temperature in the first air mix chamber 17. 2nd air mix chamber 1 where air mixes
8 are provided.

On the upper side of the heater case 2 in the figure,
Between the FACE outlet 12 and the DEF outlet 13, the FA
A rectangular communication port 19 opened near the CE outlet 12 is formed. The communication port 19 is provided in the partition wall 20 and forms a communication path that connects the air passage 15 and the hot air bypass passage 16. Further, an air passage 1 is provided below the heater case 2 from the outlet of the heating heat exchanger 4.
A substantially J-shaped hot air passage 21 is formed to connect the inlet 5 and the hot air bypass passage 16.

The outlet switching means includes a foot (FOO) as a first outlet switching door for opening and closing the FOOT outlet 11.
T) door 22, a face (FACE) door 23 as a second outlet switching door for opening and closing the FACE outlet 12,
And a defroster (DEF) door 24 as a third air outlet switching door for opening and closing the DEF air outlet 13. The FACE door 23 is rotatably supported by the partition wall 20 on the FACE outlet 12 side,
It also serves as a communication passage opening / closing door that opens and closes the communication port 19.

Each of the FOOT door 22, the FACE door 23 and the DEF door 24 has a resin door portion on both sides of which a packing such as urethane resin is adhered, and a heater integrally formed at one end of the resin door portion. Round rod-shaped support shaft (shaft) rotatably supported by case 2
This is a single-sided support plate door configured from the above. The FOOT door 22, the FACE door 23 and the DEF door
The door 24 switches to any one of an outlet mode among a face (FACE) mode, a bilevel (B / L) mode, a foot (FOOT) mode, a foot differential (F / D) mode, and a defroster (DEF) mode.

Here, the FACE mode is an air outlet mode for blowing conditioned air toward the head and chest (upper body) of the vehicle occupant, and the B / L mode is a mode in which the head and chest and the foot of the vehicle occupant are The FOOT mode is an outlet mode in which the conditioned air is blown toward the feet of the vehicle occupant. The F / D mode is an air outlet mode that blows conditioned air toward both the feet of the vehicle occupant and the inner surface of the windshield, and the DEF mode is directed toward the inner surface of the windshield. This is an outlet mode for blowing out conditioned air.

When the FOOT door 22, the FACE door 23, and the DEF door 24 are driven by an actuator such as a servo motor, the air conditioner ECU
The outlet mode is determined by controlling the actuator. Further, the FOOT door 22, the FACE door 23, and the DEF door 24 may be configured such that an outlet mode is determined according to an operation position of a manual operating means such as an outlet switching lever.

Next, the operation of the vehicle air conditioner 1 according to the present embodiment will be briefly described with reference to FIGS.

B) FACE Mode When the outlet mode is the FACE mode, the FOOT outlet 11 is closed (sealed) by the FOOT door 22 as shown in FIG. FA
The CE outlet 12 is opened, the communication port 19 is sealed, and the DEF outlet 13 is further sealed by the DEF door 24.

Thus, the cool air flowing into the air upstream of the heater case 2 from the discharge port of the scroll case 5 of the centrifugal blower is distributed according to the opening of the A / M door 3. Then, a part of the cold air distributed by the A / M door 3 is supplied to the first air mix chamber 17 of the air passage 15.
Flows directly into

On the other hand, the remaining portion of the cold air is heated when passing through the heating heat exchanger 4 to become hot air, and then passes from the outlet of the heating heat exchanger 4 through the hot air passage 21 to the first air. It flows into the mix chamber 17. Here, in the FACE mode, since the communication port 19 is shut by the FACE door 23 and the DEF outlet 13 is shut by the DEF door 24, no hot air flows through the hot air bypass passage 16.

Therefore, the first air mix chamber 1
The conditioned air that has been cooled to an appropriate temperature by mixing the cold air and the hot air in 7 is blown into the vehicle interior from the FACE outlet 12 opened by the FACE door 23. That is, the conditioned air blown into the passenger compartment from the FACE outlet 12 is transmitted to the A / M door 3.
The temperature is easily controlled in accordance with the opening of the A / M door 3 because the air is mixed according to the ratio of the cold air and the hot air distributed in the above.

B) In B / L mode When the outlet mode is the B / L mode, the FOOT door 11 is opened by the FOOT door 22 as shown in FIG. FACE outlet 1
2 is opened, and the communication port 19 is sealed.
The EF outlet 24 is sealed by the EF door 24.

In the B / L mode, the communication port 19 is shut by the FACE door 23 and the DEF outlet 13 is shut by the DEF door 24 in the same manner as in the FACE mode. There is no hot air flowing through. Therefore, the conditioned air that has been cooled to an appropriate temperature by mixing the cold air and the hot air in the first air mix chamber 17 is opened at the FACE outlet 12 or the FOOT door 22 opened at the FACE door 23. FO
The air is blown out of the OT outlet 11 into the vehicle interior.

C) FOOT mode When the outlet mode is the FOOT mode, the FOOT outlet 11 is opened by the FOOT door 22 and the FACE outlet is opened by the FACE door 23 as shown in FIG. 12 is sealed, and the communication port 19 is opened.
The DEF door 24 seals the DEF outlet 13.

In the FOOT mode, the communication port 19 is opened by the FACE door 23, but the DEF door 24
, The DEF outlet 13 is shut off, so that hot air does not flow through the hot air bypass passage 16. Therefore, the conditioned air that has been cooled to an appropriate temperature by mixing the cold air and the hot air in the first air mix chamber 17 is supplied to the FOOT door 22.
Is blown into the vehicle interior from the FOOT outlet 11 which is opened.

D) In the F / D mode When the outlet mode is the F / D mode, the FOOT door 11 is opened by the FOOT door 22 and the FACE door 23 is opened by the FOOT door 22, as shown in FIG. FACE outlet 1
2 is sealed, and the communication port 19 is opened.
The DEF outlet 13 is opened by the EF door 24.

In the F / D mode, the FACE door 2
Since the communication port 19 is open at 3 and the DEF outlet 13 is also open at the DEF door 24, hot air flows into the hot air bypass passage 16. Therefore, a part of the conditioned air that has been cooled to an appropriate temperature by mixing the cold air and the hot air in the first air mix chamber 17 is blown into the vehicle compartment from the FOOT outlet 11 opened by the FOOT door 22. .

The hot air flowing into the hot air bypass passage 16 from the outlet of the heating heat exchanger 4 through the hot air passage 21 flows into the second air mixing chamber 18 through the outlet of the hot air bypass passage 16. Flows into. On the other hand, the remainder of the conditioned air that has been cooled to an appropriate temperature by mixing the cool air and the warm air in the first air mix chamber 17 flows into the second air mix chamber 18 through the communication port 19.

Then, the cold air and the high-temperature hot air are mixed in the second air mixing chamber 18 to form the FOOT air outlet 1.
The air-conditioned air having a higher temperature than the air-conditioned air blown out from the DEF outlet 1 is opened by the DEF door 24.
From the passenger compartment. Therefore, in the F / D mode, the temperature of the air blown out from the DEF outlet 13 into the vehicle interior can be increased by using the hot air bypass passage 16, so that the vertical temperature is higher than in the B / L mode. The difference can be made large.

Since the high-temperature conditioned air is intensively blown toward the inner surface of the windshield, no fogging occurs on the inner surface of the windshield, and the inner air of the windshield is generated. Fogging can be removed instantly.

(E) DEF mode When the outlet mode is the DEF mode, the FOOT outlet 11 is sealed by the FOOT door 22 and the FACE outlet by the FACE door 23 as shown in FIG. 12 is sealed, and the communication port 19 is opened.
The DEF door 13 is opened by the DEF door 24.

In the DEF mode, the communication port 19 is opened by the FACE door 23 and the DEF outlet 13 is opened by the DEF door 24 in the same manner as in the F / D mode. Hot air flows in the bypass passage 16. Therefore, the conditioned air that has been cooled to an appropriate temperature by mixing the cool air and the warm air in the first air mix chamber 17 flows into the second air mix chamber 18 through the communication port 19.

On the other hand, the high-temperature hot air flowing into the second air mixing chamber 18 from the outlet of the heating heat exchanger 4 through the hot air passage 21 and the hot air bypass passage 16 is supplied to the second air mixing chamber 18. After being mixed with the air-conditioning air flowing in from the communication port 19, the air is blown into the vehicle interior from the DEF air outlet 13 opened by the DEF door 24. Therefore, high-temperature conditioned air is intensively blown toward the inner surface of the windshield, so that no fogging occurs on the inner surface of the windshield. Can be removed.

[Effects of the Embodiment] As described above, in the heater unit 1 of the present embodiment, the air passage 15 and the hot air bypass passage 16 are partitioned by the partition wall 14, and the warm air bypass passage 16 is The heater case 2 can be prevented from being enlarged in the thickness direction by being provided adjacent to and in parallel with the air passage 15 on both sides in the width direction of the case 2. Thereby, downsizing of the heater unit 1 in the thickness direction can be achieved. A communication port 19 that connects the air passage 15 and the hot air bypass passage 16 is connected to the FACE door 23.
By reducing the number of parts compared to a heater unit with a dedicated communication opening / closing door,
The size of the heater unit 1 can be reduced.

Further, by providing the hot air bypass passage 16 on the support shaft side of the A / M door 3, the effective heat exchange area of the heat exchanger 4 for heating and one end of the A / M door 3 can be changed. The size up to the end can be increased. Thereby, the passage cross-sectional area of the ventilation passage on the air upstream side of the heating heat exchanger 4 can be increased, so that the amount of air flowing through the heater case 2 can be increased. Therefore, the FOOT outlet 11, the FACE outlet 12, and the DEF outlet 13
The airflow of the conditioned air blown into the vehicle interior from the vehicle can reach the target airflow.

Then, in the B / L mode, the communication port 19 is sealed with the FACE door 23 and the communication port 19 is sealed with the DEF door 24.
By sealing the EF outlet 13, hot air does not flow in the hot air bypass passage 16, so that high-temperature hot air can be prevented from being sent from the hot air bypass passage 16 to the FACE outlet 12. Therefore, the FACE outlet 12
Thus, it is possible to prevent the temperature of the air blown into the vehicle compartment from rising, so that it is possible to obtain a good head and foot heat state with a good air conditioning feeling.

Further, the communication port 19 is opened by the FACE door 23 only in the F / D mode or the DEF mode.
By opening the DEF outlet 13 with the DEF door 24, high-temperature hot air is sent from the hot air bypass passage 16 to the DEF outlet 13. Therefore, the hot air bypass passage 16 can be used only in the outlet mode in which it is necessary to increase the temperature of the air blown out from the DEF outlet 13 serving as the upper outlet.

By providing the hot air inlet of the hot air bypass passage 16 on the side of the heating heat exchanger 4 near the outlet of the heating heat exchanger 4, the comparison of the hot air flowing out of the outlet of the heating heat exchanger 4 is performed. Since the high-temperature hot air can flow directly into the hot-air bypass passage 16, the temperature of the conditioned air blown into the vehicle interior from the DEF outlet 13 can be easily increased.

[Other Embodiments] In this embodiment, the partition wall 20 provided integrally inside the heater case 2 has
A communication port 19 for communicating the air passage 15 and the hot air bypass passage 16 is provided, and the communication port 19 is shut by the FACE door 23 in the FACE mode or the B / L mode. As shown in FIG. 4, one or a plurality of communication holes 25 are provided in the partition wall 20 located on the outlet side of the hot air bypass passage 16 with respect to the communication port 19, and the partition wall 20 is provided in the FACE mode or the B / L mode. The high-temperature hot air passing through the hot-air bypass passage 16 from the communication hole 25 is
The temperature of the air blown from the FACE outlet 12 may be increased by feeding the air into the ACE outlet 12.

In this embodiment, two air passages 15
Although the two hot air bypass passages 16 are provided, one hot air bypass passage 16 may be provided on one side in the width direction of the air passage 15, or one hot air bypass passage between the two air passages 15. 16 may be provided. Further, the air passage 15 extends in the width direction of the ventilation passage formed in the heater case 2.
And the hot air bypass passage 16 may be provided alternately.

[Brief description of the drawings]

FIG. 1 is a sectional view showing each door position in a DEF mode (embodiment).

FIG. 2 is a sectional view showing a heater unit of the vehicle air conditioner (embodiment).

FIG. 3 is a sectional view showing each door position in a FACE mode (embodiment).

FIG. 4 is a sectional view showing each door position in a B / L mode (embodiment).

FIG. 5 is a sectional view showing each door position in a FOOT mode (embodiment).

FIG. 6 is a sectional view showing each door position in the F / D mode (embodiment).

FIG. 7 is a cross-sectional view showing a heater unit of a vehicle air conditioner (prior art).

[Explanation of symbols]

 Reference Signs List 1 heater unit 2 heater case 3 A / M door 4 heating heat exchanger 11 FOOT outlet (first outlet) 12 FACE outlet (second outlet) 13 DEF outlet (third outlet) 14 partition wall Reference Signs List 15 air passage 16 hot air bypass passage 17 first air mix chamber 18 second air mix chamber 19 communication port (communication passage) 20 partition wall 21 hot air passage 22 FOOT door (first air outlet switching door) 23 FACE door (first 2 outlet switching door) 24 DEF door (third outlet switching door)

Claims (6)

[Claims] 1. A heating heat exchanger for heating air, one end of which is rotatably supported by a support shaft to bypass the heating heat exchanger and the amount of air passing through the heating heat exchanger. An air conditioner for a vehicle, comprising: an air mix door for adjusting an amount of air; and a heater case incorporating the heating heat exchanger and the air mix door, wherein the heater case is air-conditioned at a foot of an occupant. A first outlet for blowing the wind, a second outlet for blowing the conditioned air to the head and chest of the occupant, a third outlet for blowing the conditioned air to the window glass, the temperature passing through the heating heat exchanger. An air passage that guides air-conditioned air, which is a mixture of air and cold air that bypasses the heating heat exchanger, to the first outlet or the second outlet, and is provided on a spindle side of the air mix door, Heating when passing through the heating heat exchanger The the warm air to bypass said air passage, said second air outlet or the third
An air conditioner for a vehicle, comprising a hot air bypass passage leading to an air outlet. 2. A vehicle air conditioner according to claim 1, wherein said hot air bypass passage is provided in parallel with said air passage in a width direction of said heater case. apparatus. 3. The vehicle air conditioner according to claim 2, wherein the hot air bypass passage is partitioned by a partition wall so as to be adjacent to the air passage on one side in the width direction of the heater case. An air conditioner for a vehicle, comprising: 4. The vehicle air conditioner according to claim 2, wherein the hot air bypass passage is defined by a partition wall adjacent to the air passage on both sides in the width direction of the heater case. An air conditioner for a vehicle, comprising: 5. The vehicle air conditioner according to claim 1, wherein a hot air inlet of the hot air bypass passage on a side of the heating heat exchanger is connected to the air passage of the air passage. A vehicle provided near the outlet on the side of the heat exchanger for heating, so that warm air flowing out of the outlet of the heat exchanger for heating directly flows into the hot air bypass passage. Air conditioner. 6. The vehicle air conditioner according to claim 1, wherein the heater case opens and closes the first outlet.
An air outlet switching door, a second air outlet switching door that opens and closes the second air outlet, a third air outlet switching door that opens and closes the third air outlet, and a communication between the air passage and the hot air bypass passage. And a communication passage for joining the conditioned air flowing through the air passage with the warm air from the hot air bypass passage, wherein the second air outlet switching door opens and closes the communication passage. An air conditioner for a vehicle, which also serves as a door.