JPH11301243A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a function of independently controlling blowoff air temperature to the front seat side and the rear seat side compatible with the miniaturization of constitution of the whole air-conditioning unit. SOLUTION: A cooling heat exchanger 12 and a heating heat exchanger 13 are arranged in a vehicle longitudinal direction inside an air-conditioning case 11, and blowoff air temperature from a blowoff opening part 30 on the front seat side is regulated by a front seat air mixing door 16. Further in the air-conditioning case 11, a rear seat cold air intake 21 for taking in cold air from a cold air by-pass passage 15, and a rear seat hot air intake 25 for taking in hot air from the heating heat exchanger 13, and a rear seat air mixing door 26 are arranged at parts within a range of vehicle lateral direction width dimension of the heating heat exchanger 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner capable of controlling the temperature of air blown to a front seat and the temperature of air blown to a rear seat independently.

[0002]

2. Description of the Related Art Conventionally, in a vehicle air conditioner, for example, Japanese Patent Application Laid-Open No. 61-2573 discloses a type in which the temperature of air blown to a front seat and the temperature of air blown to a rear seat can be independently controlled.
Japanese Patent Publication No. 12 describes that the air mix doors for the front seat and the rear seat for independently adjusting the air volume ratio of the hot air passing through the heating heat exchanger and the cool air bypassing the heating heat exchanger are independently installed. Have been. In the prior art described in this publication,
A special air blower for the rear seats is installed to independently control the air flow to the rear seats. There is no suggestion as to how to place them.

[0003]

In recent years, due to an increase in the mounting amount of various devices installed in the instrument panel of the vehicle compartment and a demand for an increase in the interior space of the passenger compartment, the device is installed in the instrument panel of the vehicle compartment. The demand for miniaturization of air conditioning units is increasing. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and aims to reduce the size of the entire air conditioning unit in a vehicle air conditioner having a function of independently controlling the temperature of air blown to a front seat and a rear seat. With the goal.

[0004]

In order to achieve the above object, according to the first to third aspects of the present invention, an air conditioning case (11) is provided.
Inside, a cooling heat exchanger (12) is arranged on the vehicle front side,
A heating heat exchanger (13) is arranged on the rear side of the vehicle, and cool air flowing through the cold air bypass passage (15) of the heating heat exchanger (13) and warm air passing through the heating heat exchanger (13). Is adjusted by the front seat air mix door (16), and air mixed with warm air from the heating heat exchanger (13) and cool air from the cool air bypass passage (15) is supplied to the air conditioning case (11). ) Through the defroster opening (30), the front seat face opening (34) and the front seat foot opening (35), and further in the air conditioning case (11).
A cold air inlet (21) for a rear seat that takes in cool air from the cold air bypass passage (15) and a heating heat exchanger ( A hot air intake (25) for the rear seat for taking in the hot air from 13) is formed, and the cool air from the cold air intake (21) for the rear seat and the hot air from the hot air intake (25) for the rear seat are formed. The rear-seat air mix door (26) for adjusting the ratio of the air flow to the air conditioner (11) is arranged in the air conditioning case (11) at a position within the width of the heating heat exchanger (13) in the lateral direction of the vehicle. Air mixed with cold air from the cold air inlet (21) for the seat and warm air from the hot air inlet (25) for the rear seat is blown out from the rear seat outlet (29) provided in the air conditioning case (11). It is characterized by flowing out.

According to this, the defroster opening (3)
0), the temperature of air blown from the front seat face opening (34) and the front seat foot opening (35) can be adjusted by the front seat air mixing door (16), and the rear seat blowing opening (29). ) Can be independently adjusted by the rear air mix door (26). Therefore, it is possible to independently control the temperature of the air blown to the front and rear of the vehicle compartment.

In addition, a cooling heat exchanger (12) and a heating heat exchanger (1) are arranged in the air-conditioning case (11) in the longitudinal direction of the vehicle.
3) can be obtained in a compact integrated unit in which the above-mentioned independent temperature control functions for the front and rear of the vehicle compartment can be obtained. In addition, a rear-seat cold air intake (21) for taking in cool air from the cool-air bypass passage (15) and a rear-seat hot air intake (25) for taking in warm air from the heating heat exchanger (13) are provided. , These two entrances (21, 25)
Since the ratio of the cool / hot air taken in from the rear is adjusted by the rear air mixing door (26), even if the air flow to the rear seat blowout opening (29) is shut off, the cooling heat exchanger ( 12) and the air flow to the heating heat exchanger (13) are not interrupted at all. Therefore, even when the air blowing to the rear seat side is stopped, both heat exchangers (12, 13)
The heat exchange can be performed using the entire area of the heat exchange surface of the heat exchanger, and the capabilities of both heat exchangers (12, 13) can be effectively exhibited.

Further, the elements (21, 25, 26) constituting the air mixing mechanism for controlling the rear-seat outlet temperature.
Are arranged in a portion of the width of the heating heat exchanger (13) in the lateral direction of the vehicle, so that the rear air mixing mechanism can be made compact within the width of the heating heat exchanger (13). Can be configured. Together with the above effects, it is possible to provide a compact air-conditioning unit that favorably performs a function of controlling the temperature independently in the front and rear of the vehicle cabin, which is extremely advantageous in mountability on a vehicle.

According to the second aspect of the present invention, the cold air intake for the rear seat (21), the hot air intake for the rear seat (25), the air mix door for the rear seat (26) and the rear opening are provided. (2
9) is formed at the center of the width of the heating heat exchanger (13) in the lateral direction of the vehicle, and the front seat foot opening (3) is formed.
5) is characterized by being formed on the left and right sides of the rear seat outlet opening (29).

According to this, the rear opening (29)
The wind can be blown directly from the front foot opening (35) formed on the left and right sides of the front seat to the driver's seat side foot and the passenger's seat side foot of the front seat, which is practically convenient. In the invention according to claim 3, the air conditioning case (1
1) A partition wall (22) is formed inside, and the cool air from the cold air inlet (21) for the rear seat and the hot air inlet (25) for the rear seat are formed.
It is characterized in that a rear seat air passage (23) through which warm air from the air flows toward the rear seat blowout opening (29) is partitioned by a partition wall (22).

According to this, the air flow to the rear-seat outlet opening (29) is impeded by the rear-seat air passage (23) defined by the partition wall (22), which hinders the air conditioning function on the front-seat side. And can be formed well. In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means of embodiment mentioned later.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show the air-conditioning unit 10 according to the present embodiment. The ventilation system of the vehicle air-conditioning system according to the present embodiment is roughly divided into a blower unit (not shown) and an air-conditioning unit 10. Divided into The blower unit is located below the instrument panel
It is located offset from the center to the passenger seat side,
On the other hand, the air-conditioning unit 10 is arranged at a substantially central portion of the lower part of the instrument panel in the vehicle interior in the vehicle left-right direction.

As is well known, the blower unit comprises an inside / outside air switching box for switching and introducing inside air (vehicle interior air) and outside air (vehicle outside air), and a blower for sucking air through the inside / outside air switching box to blow air. ing. The air conditioning unit 10 is of a type in which an evaporator (heat exchanger for cooling) 12 and a heater core (heat exchanger for heating) 13 are both integrated into one common air conditioning case 11. The air-conditioning case 11 is made of a molded article of a resin such as polypropylene having a certain degree of elasticity and excellent strength. The air-conditioning case 11 is specifically composed of a plurality of divided cases. The plurality of divided cases accommodates the heat exchangers 12 and 13 and devices such as doors to be described later, and then includes fastening means such as metal spring clips and screws. To form the air-conditioning unit 10.

The air-conditioning unit 10 is disposed in a substantially central portion of a lower part of an instrument panel in a vehicle compartment in the form shown in FIGS. 1 is a cross-sectional view taken along the line CC of FIG. 3, and FIG.
3 is a DD cross section of FIG. An air inlet 14 is formed on the side surface of the air-conditioning case 11 that is closest to the front of the vehicle. The conditioned air blown from the blower unit flows into the air inlet 14.

An evaporator 12 is disposed in the air conditioning case 11 immediately after the air inlet 14. This evaporator 1
Numeral 2 is arranged in a vertical direction so as to cross the passage in the air conditioning case 11 in a thin form in the vehicle front-rear direction. Therefore, the blast air from the air inlet 14 flows into the front surface of the evaporator 12 extending in the vehicle vertical direction. As is well known, the evaporator 12 cools the conditioned air by absorbing the latent heat of evaporation of the refrigerant in the refrigeration cycle from the conditioned air.

A heater core 13 is disposed downstream of the evaporator 12 on the air flow side (rear side of the vehicle) at a predetermined interval. The heater core 13 is disposed at a lower side in the air conditioning case 11 so as to be inclined toward the vehicle rear side. Further, as shown in FIG. 3, the width of the heater core 13 in the vehicle left-right direction is designed to be substantially equal to the width of the air conditioning case 11. The width of the evaporator 12 in the vehicle left-right direction is the same as the heater core 13, and is designed to be substantially equal to the width of the air-conditioning case 11.

The heater core 13 reheats the cold air that has passed through the evaporator 12, and flows therein high-temperature hot water (engine cooling water). The hot water is used as a heat source to heat the air. In this embodiment, the hot water inlet tank 13a of the heater core 13 is arranged on the lower side, and the hot water outlet tank 13b is arranged on the upper side.
A heat exchange core 13c is arranged between 3a and 13b.

In the air passage in the air-conditioning case 11, a cool air bypass passage 15 through which air (cool air) flows bypassing the heater core 13 is provided above the heater core 13.
Are formed. Further, the heater core 13 and the evaporator 12
A flat air-mixing door 16 for a front seat that adjusts the ratio of the amount of hot air heated by the heater core 13 to the amount of cold air that bypasses the heater core 13 through the cool air bypass passage 15 is disposed between Have been.

Here, the air mix door 16 for the front seat is used.
Is integrally connected to a rotating shaft 17 arranged in the horizontal direction, and is rotatable with the rotating shaft 17 in the vertical direction of the vehicle. The air mix door 16 constitutes a front seat side temperature adjusting means for adjusting the temperature of the air blown out to the front seat side in the vehicle compartment by adjusting the air flow rate. The rotating shaft 17 is rotatably supported by the air-conditioning case 11, and one end of the rotating shaft 17 protrudes outside the air-conditioning case 11. An actuator mechanism using a servomotor or the like or a manual The air mix door 1 is connected to an operation mechanism, and is operated by the actuator mechanism or the manual operation mechanism.
6 is adjusted.

In the air-conditioning case 11, a wall surface 18 extending in the vertical direction at a predetermined interval from the heater core 13 is formed integrally with the air-conditioning case 11 downstream of the heater core 13 (portion on the rear side of the vehicle). Have been. The wall surface 18 forms a warm air passage 19 that extends upward from immediately after the heater core 13. The downstream side (upper side) of the hot air passage 19 merges with the downstream side of the cool air bypass passage 15 in the upper portion of the heater core 13 to form a front seat air mixing unit 20 that mixes cold air and hot air. Here, at the position where the front air mix door 16 fully closes the cool air bypass passage 15 (position 16a in FIGS. 1 and 2), the rear cold air inlet 21 closed by the front air mix door 16 is partitioned. It is formed by the wall 22.

The cold air inlet 21 for the rear seat and the partition wall 22
Is located at the center of the width of the heater core 13 in the width direction of the vehicle inside the air conditioning case 11, and
The cold air bypass passage 15 is located at a position below the vehicle. The partition wall 22 is formed integrally with the air-conditioning case 11, and is formed in a portal shape as shown in FIGS. The partition wall 22 defines a rear seat air passage 23 extending rearward from the portion of the rear seat cold air intake 21.

On the vehicle upper side (FIG. 1) and the left and right sides of the vehicle (FIGS. 2 and 4) of the partition wall 22, cold air intake for the front seat for taking in the cold air flowing from the cold air bypass passage 15 toward the front air mixing section 20. An inlet 24 is formed. On the other hand, a warm air inlet 25 for the rear seat is formed immediately after the upper end of the heater core 13 (the hot water outlet side tank 13b). The rear-seat warm air inlet 25 connects the warm-air passage 19 to the rear-seat air passage 23 in the partition wall 22. As shown in FIG. 3, the heater core 13 has a width dimension in the vehicle left-right direction. It is located in the center of the range. Inside the air passage 23 for the rear seat, a flat rear air air for adjusting the ratio of the amount of the cool air from the cool air intake 21 for the rear seat and the amount of the hot air from the warm air intake 25 for the rear seat is provided. A mix door 26 is provided.

The rear-seat air mix door 26 is also disposed at the center of the heater core 13 within the width of the vehicle in the left-right direction, and is rotated in the vertical direction of the vehicle by a rotating shaft 27 disposed horizontally. It is possible. The rear-seat air mix door 26 constitutes a rear-seat-side temperature adjusting means for adjusting the temperature of the air blown to the rear seat side in the vehicle compartment by adjusting the air flow rate.

The rotating shaft 27 is rotatably supported by the air conditioning case 11, and one end of the rotating shaft 27 protrudes outside the air conditioning case 11 as shown in FIG. Further, the drive link 28 is connected to an independent actuator mechanism using a servo motor or the like or a manual operation mechanism via a link mechanism (not shown),
The rotation position of the rear air mix door 26 is independently adjusted by the actuator mechanism or the manual operation mechanism.

The end of the rear air passage 23 downstream of the rear air mix door 26 is located at the rearmost portion of the air-conditioning case 11 at the rear of the vehicle, and the downstream end (rear portion of the vehicle). The rear-seat outlet opening 29 is opened downward. The rear-seat outlet opening 29 is located at the center in the vehicle left-right direction as shown in FIG. A rear-seat connection duct (not shown) is provided in the rear-seat outlet opening 29.
Through a rear face air outlet (not shown) and a rear foot air outlet (not shown).

On the other hand, on the upper surface of the air conditioning case 11,
The defroster opening 3 is opened at a position adjacent to the front seat air mixing section 20. The defroster opening 30 receives temperature-controlled conditioned air from the air mixing unit 20 and is connected to a defroster outlet via a defroster duct (not shown). Blow the wind toward the inside.

The defroster opening 30 is opened and closed by a flat defroster door 31. This defroster door 31
Is rotated by a rotary shaft 32 arranged in the horizontal direction near the upper surface of the air conditioning case 11. The defroster door 31 switches and opens and closes the defroster opening 30 and the communication port 33. The communication port 33 serves as a passage for flowing the conditioned air from the air mixing section 20 to the front seat opening 34 and the front foot opening 35 described later.

On the upper surface of the air conditioning case 11, a face opening 34 is provided at a position on the vehicle rear side (closer to the occupant) than the defroster opening 30, and the face opening 34 is provided via a face duct (not shown). The air outlet is connected to a face outlet disposed above the instrument panel, and blows air from the face outlet toward the head of an occupant in the passenger compartment.

Next, in the air conditioning case 11, a foot opening 35 is provided below the face opening 34 in a positional relationship facing the face opening 34. As shown in FIG. 3, the foot openings 35 are separately arranged on the left and right sides of the rear seat blowout opening 29. The air from the left and right foot openings 35 is blown out to the driver's seat side of the front seat and the passenger's feet on the front passenger seat side via a front seat foot duct (not shown) and a front seat foot outlet.

A flat-faced foot face switching door 36 is rotatably disposed between the openings 34 and 35 by a rotating shaft 37. The switching door 36 allows the face opening 34 and the foot opening 35 to be opened. Are switched open and closed. Here, the switching door 36 is divided and disposed on the left and right sides corresponding to the two foot openings 35 on the left and right sides, and the rotating shafts 37 of the two left and right switching doors 36, 36 are disposed.
37 is integrally connected, two left and right switching doors 36,
Reference numeral 36 is integrally operated.

By the way, the defroster door 31 and the foot face switching door 36 are door means for switching the blowing mode, and an actuator mechanism for switching the blowing mode such as a servomotor or a manual mechanism via a link mechanism (not shown). It is connected to an operation mechanism, and is operated in conjunction with the actuator mechanism or the manual operation mechanism.

Next, the operation of the present embodiment in the above configuration will be described. In the vehicle air conditioner of the present embodiment, the operating positions of the defroster door 31 and the foot face switching door 36 serving as the door means for blowing mode switching are set. By making a selection, the following blowing modes can be set. (1) Face blowing mode By operating the defroster door 31 to the solid line position in FIGS.
The defroster opening 30 is closed and the communication port 33 is fully opened. Further, the foot opening 35 is closed by operating the foot face switching door 36 to the position indicated by the solid line in FIG. At this time, when the air mix door 16 for the front seat is operated to the solid line position in FIGS. 1 and 2, the maximum cooling state in which the ventilation path to the heater core 13 is fully closed and the cold air bypass path 15 is fully opened is set. In this state, when a blower unit and a refrigeration cycle (not shown) are operated, the blown air from the blower unit flows in from the air inlet 14 and is cooled by the evaporator 12 to become cool air.

In the maximum cooling state, the cool air passes through the cool air bypass passage 15 as it is, and the cool air intake 24 for the front seat,
The air flows toward the front-seat face opening 34 via the front-seat air mixing section 20 and the communication port 33, and cool air is blown from the front-seat face outlet toward the head of the front-seat occupant. At this time, when the rear air mix door 26 is operated to the solid line position in FIG. 1 to close the hot air inlet 25 for the rear seat and fully open the air passage 23 for the rear seat, the cool air bypass passage 15 is opened. Part of the cool air flows into the rear seat air passage 23 from the rear seat cool air inlet 21 and passes through the air passage 23 toward the rear seat outlet opening 29. Further, cool air is blown from the rear-seat outlet opening portion 29 toward the head of the rear-seat occupant through the rear-seat connection duct and the rear-seat face outlet.

When the air mix door 16 for the front seat is operated from the solid line position (maximum cooling position) in FIGS. Most of the cool air passes through the cool air bypass passage 15 in accordance with the opening position of (1), and the remaining cool air flows into the heater core 13 and is heated to become hot air. The cool air in the cool air bypass passage 15 flows from the cool air inlet 24 for the front seat to the air mixing section 20 for the front seat. The warm air heated by the heater core 13 rises in the warm air passage 19 to be mixed with the front seat air mixing section 20.
, Where it joins with the cold air and is mixed.

The air adjusted to the desired temperature by mixing the cool air and the warm air flows toward the front seat face opening 34 through the communication port 33. At this time, the front seat air mix door 16
Is operated to the intermediate opening position, the open state of the rear cold air inlet 21 is maintained, so that part of the cool air in the cold air bypass passage 15 passes through the rear cold air inlet 21 and the rear seat is cooled. Flows into the use air passage 23. Therefore, when the rear-seat air mix door 26 is operated from the solid line position (maximum cooling position) in FIG. 1 to the intermediate opening position, the rear-seat warm air intake 25 is opened, and the warm air in the warm air passage 19 is released. Part flows into the rear-seat air passage 23 from the rear-seat warm air intake 25 and the rear-seat air mix door 2.
On the downstream side of 6, the cold air from the rear-seat cold air inlet 21 and the hot air from the rear-seat hot air inlet 25 are mixed to reach a desired temperature. The wind at the desired temperature is blown out from the rear-seat outlet opening 29 toward the rear-seat passenger. By independently controlling the operation positions (rotational positions) of the front air mix door 16 and the rear air mix door 26, the face blown air temperatures of the front seat side and the rear seat side can be controlled independently.

(2) Bi-level blowing mode By operating the defroster door 31 to the solid line position in FIGS.
The defroster opening 30 is closed and the communication port 33 is fully opened. In addition, the foot face switching door 36 is operated to an intermediate position between the solid line position and the broken line position in FIG. 2 to open both the front seat face opening 34 and the front seat foot opening 35.

In the bi-level blowing mode,
Since the front air mix door 16 is operated to the intermediate opening position, the wind adjusted to the desired temperature is generated in the front seat opening 34 and the front seat foot opening 35 because the air mixing door 16 is used in the middle season of spring and autumn. It blows out from both up and down in the cabin at the same time. In addition, since the rear-seat cold air intake 21 is opened by operating the front-seat air mix door 16 to the intermediate opening position, the rear seat side can be moved up and down in the vehicle cabin from both the face opening and the foot opening. At the same time, a bi-level blowing mode in which the wind is blown out can be set.

(3) Foot blowing mode The defroster door 31 is operated from the solid line position in FIGS. 1 and 2 to a position where the defroster opening 30 is opened a little and the communication port 33 is opened (almost fully opened). Further, the foot face switching door 29 is operated to the broken line position in FIG. 2 to close the front seat face opening 34 and fully open the front seat foot opening 35.

At this time, when the air mix door 16 for the front seat is operated to the dashed position 16a in FIGS. 1 and 2, the maximum heating state is set in which the cold air bypass passage 15 is fully closed and the ventilation path to the heater core 13 is fully opened. You. In this state, when a blower unit (not shown) is operated, the blown air from the blower unit flows in from the air inlet 14, passes through the evaporator 12, and the whole amount flows into the heater core 13 and is heated, so that the hot air is heated. Becomes This warm air rises through the warm air passage 19 to reach the front seat air mixing section 20, from which the air flows to the front seat foot opening 35 through the communication port 33, and from there toward the foot of the front seat occupant. Hot air blows out.

At this time, the rear-seat air mix door 26 is moved to the position indicated by the broken line in FIG.
When the door 5 is fully opened, a part of the warm air in the warm air passage 19 flows from the warm air inlet 25 for the rear seat into the air passage 23 for the rear seat, passes through the air passage 23 and the outlet opening 29 for the rear seat. Head for.
Further, warm air is blown from the rear-seat outlet opening portion 29 through the rear-seat foot outlet to the foot portion of the rear-seat occupant.

When the front air mix door 16 is operated from the broken line position (maximum heating position) in FIGS. A part of the cool air passes through the cool air bypass passage 15 in accordance with the opening position of
And is heated and becomes hot air. Cold air bypass passage 1
The cool air of No. 5 reaches the cool air inlet 24 for the front seat to the air mixing section 20 for the front seat. The warm air heated by the heater core 13 rises through the warm air passage 19 to reach the front seat air mixing section 20,
Here, it joins with the cold air and is mixed. The air adjusted to the desired temperature by mixing the cool air and the hot air blows out from the front seat foot opening 35 toward the foot of the front seat occupant through the communication port 33.

At this time, as the air mix door 16 for the front seat is operated to the intermediate opening position, the cold air inlet 2 for the rear seat is operated.
1 is released. When the rear seat air mix door 26 is operated from the broken line position (maximum heating position) in FIG. 1 to the intermediate opening position, the rear seat air passage 23 is opened. Therefore,
A part of the cool air in the cool air bypass passage 15 passes through the rear seat cool air inlet 21 and flows into the rear seat air passage 23, and a part of the warm air in the warm air passage 19 flows into the rear seat warm air inlet. 25
From the air passage 23 for the rear seat.

As a result, on the downstream side of the rear-seat air mix door 26, the cool air from the rear-seat cold air intake 21 and the hot air from the rear-seat hot air intake 25 are mixed to reach a desired temperature.
The wind at the desired temperature is blown out from the rear-seat outlet opening 29 toward the rear-seat passenger. By independently controlling the operation positions (rotational positions) of the front-seat air mix door 16 and the rear-seat air mix door 26, it is possible to independently control the front-seat side and rear-seat side foot air temperature.

In the foot blowing mode, the amount of air blown out from the defroster opening 30 and the front face opening 34
The ratio with the amount of air blown out from is usually about 2 to 8. (4) Foot defroster blowing mode The foot defroster blowing mode is a mode in which the defroster opening 30 is provided.
This is a mode in which the amount of defroster blown air is increased so that the ratio between the amount of blown air from the front and the amount of blown air from the front seat face opening 34 is about 5 to 5. Therefore, the defroster door 31 is operated to a position where the degree of opening of the defroster opening 30 increases and the degree of opening of the communication port 33 decreases as compared with the case of the foot blowing mode. This makes it possible to obtain a blowout air volume ratio of about 5 to 5 described above. The other points are the same as those in the foot blowing mode, and the description is omitted.

(5) Defroster blowing mode By operating the defroster door 31 at the position indicated by the broken line in FIGS.
The defroster opening 30 is fully opened, and the communication port 33 is closed. Therefore, the temperature of the blast air from the blower unit is adjusted by the opening position of the air mixing door 16 for the front seat, and after passing through the air mixing section 20 for the front seat, the entire amount thereof flows into the defroster opening 30 and the defroster blows. It is blown out from the exit toward the vehicle's front window glass to prevent fogging of the front window glass.

As can be understood from the above description, the operation positions (rotational positions) of the front-seat air mix door 16 and the rear-seat air mix door 26 are controlled independently in each of the blowout modes. The temperature of the air blown from the seat side and the rear seat side can be controlled independently. In addition, the rear-seat outlet opening 29
Even if the air outlet for the rear seat connected to the rear seat is closed to block the air flow from the air passage 23 for the rear seat to the outlet opening 29 for the rear seat, the air flow to the evaporator 12 and the heater core 13 is obstructed. Not at all. Therefore, even when the air blowing to the rear seat side is stopped, the evaporator 12 and the heater core 1
The heat exchange can be performed by using the entire area of the heat exchange surface of No. 3, and the capabilities of the evaporator 12 and the heater core 13 can be effectively exhibited.

Further, in the integrated air-conditioning unit 10 in which the evaporator 12 and the heater core 13 are integrally housed in the vehicle front-rear direction in the air-conditioning case 11, the rear seat is provided within the width of the heater core 13 in the vehicle left-right direction. (See FIG. 3), the size of the entire air conditioning unit 10 is prevented from being increased in size, and the air-conditioning unit 10 is excellent in mountability on a vehicle.

(Other Embodiments) In the above embodiment, as shown in FIG. 3, a rear-seat cool air inlet 21, a rear-seat air passage 23, and a rear-seat air passage 23, which constitute a rear-seat air mixing mechanism, are provided. Hot air intake 25 for seat and air mix door 2 for rear seat
Although the heater core 6 is disposed at the center of the heater core 13 in the vehicle left-right direction, the elements constituting the rear seat air-mixing mechanism may be disposed to be shifted left and right from the center of the heater core 13 in the vehicle left-right direction. In this case, the rear seat outlet opening 29 is provided.
It is also preferable to dispose them right and left.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, and shows a CC section of FIG.

FIG. 2 is a longitudinal sectional view showing one embodiment of the present invention, and shows a DD section of FIG. 3;

FIG. 3 is a view taken in the direction of arrow A in FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIGS.

[Explanation of symbols]

11 air conditioning case, 12 evaporator, 13 heater core,
15: Cold air bypass passage, 16: Front air mixing door, 19: Hot air passage, 20: Air mixing unit, 21: Rear cold air inlet, 22: Partition wall, 23: Rear air passage,
25: Hot air intake for rear seat, 26: Air mix door for rear seat, 29: Blow-off opening for rear seat, 30: Defroster opening, 31: Defroster door, 34: Face opening for front seat, 35 ... Front seat opening, 36 ... Foot face switching door.

Claims (3)

[Claims] 1. An air conditioning case (11) forming an air passage through which air flows from a front side of a vehicle to a rear side of the vehicle;
A cooling heat exchanger (12) for cooling air; and the cooling heat exchanger (1) in the air conditioning case (11).
2) A heating heat exchanger (1) that is arranged on the rear side of the vehicle and heats the air that has passed through the cooling heat exchanger (12).
3), a cool air bypass passage (1) formed in the air conditioning case (11) and cooled by the cooling heat exchanger (12) and flowing through the heating heat exchanger (13).
5) and a front seat that is arranged in the air conditioning case (11) and adjusts a flow rate of hot air passing through the heating heat exchanger (13) and cold air passing through the cool air bypass passage (15). A hot air from the heating heat exchanger (13) and the cold air bypass passage (15) provided in the air mixing door (16) and the air conditioning case (11).
A defroster opening (30) through which air mixed with cool air from the air flows out, a front face opening (34) and a front foot opening (35), and the heating in the air conditioning case (11). Heat exchanger (1
3) a cold air inlet (21) for a rear seat, which is formed in a portion within a width dimension of the vehicle in the lateral direction of the vehicle and takes in cool air from the cold air bypass passage (15); The heating heat exchanger (1)
3) A hot air inlet (25) for a rear seat, which is formed at a portion within a width dimension of the vehicle in the lateral direction of the vehicle and takes in warm air from the heat exchanger (13) for heating, and the air conditioning case (11). ), The heating heat exchanger (1)
3) The air flow between the cold air from the rear-seat cold air intake (21) and the hot air from the rear-seat hot air intake (25), which is arranged in a region within the width dimension of the vehicle in the lateral direction of 3). A rear-seat air mix door (26) for adjusting the proportion; cold air from the rear-seat cold air inlet (21) provided in the air-conditioning case (11);
An air conditioner for a vehicle, comprising: a rear-seat outlet opening (29) through which air mixed with warm air from (5) flows out. 2. The rear-seat cold air intake (21), the rear-seat hot air intake (25), the rear-seat air mix door (26), and the rear-seat outlet opening (29). The heating heat exchanger (13) is formed at a central portion within a width dimension of the vehicle in the left-right direction, and the front seat foot opening (35) is formed at a position opposite to the rear seat blowing opening (29). The vehicle air conditioner according to claim 1, wherein the air conditioner is divided into left and right sides. 3. A partition wall (22) is formed inside the air-conditioning case (11), and cool air from the rear-seat cold air inlet (21) and hot air from the rear-seat hot air inlet (25) are formed. The air conditioner for a vehicle according to claim 1 or 2, wherein a rear air passage (23) through which wind flows toward the rear outlet opening (29) is defined by the partition wall (22). apparatus.