JPH09240247A - Air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an installation space for a heat exchanger unit. SOLUTION: In the central part of an instrument panel in a vehicle interior, an evaporator 21 is arranged substantially horizontally, and blowing air from a blower is passed upward from the lower side of the evaporator 21. A heater core 22 is arranged substantially horizontally above the evaporator 21, and a blow-out mode switching unit 23 is arranged above the heater core 22. In addition, partition plates 20A-20C are arranged inside a case 30 in an air conditioner unit 2 so as to divide a blower passage into the first blower passage 19a and the second blower passage 19b. In this way, the outside air can be fed to the first blower passage 19a on a defroster passage 28 side in warming, while the inside air can be fed to the second blower passage 19b connected to a foot blow-out port side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for an automobile, and more particularly to an air conditioner unit in which air blown from a blower is introduced from below, and an air conditioner heat exchanger is installed at a substantially horizontal angle on the downstream side. Related to the layout.

[0002]

2. Description of the Related Art Conventionally, air conditioner units for automobiles, which are generally provided, are often of the so-called horizontal type. In this type, the blower unit, the cooler unit, and the heater unit are arranged in a straight line in the lateral direction (width direction) of the vehicle.

In this horizontal type, when mounted on a vehicle, the above-mentioned units are arranged over approximately half of the space in the vehicle instrument panel in the vehicle width direction (front portion on the passenger seat side). The unit will occupy a very large portion of the instrument panel space.

[0004]

However, in recent years, the number of in-vehicle computers has increased due to the electronics of vehicles,
The installation space of the air conditioner unit in the instrument panel has been reduced due to the installation of the CD changer in the passenger compartment and the increase in the passenger airbag installation rate.
It is becoming difficult to mount the above-mentioned horizontal type air conditioner unit on a vehicle.

Therefore, the air conditioner unit in which the evaporator for the cooler and the heater core are arranged in the longitudinal direction of the vehicle to be integrated is installed in the central portion of the vehicle, and only the blower is arranged offset in the width direction from the central portion of the vehicle. The structure is also considered. According to this center placement type layout, the evaporator for the cooler and the heater core are centrally installed in the central part of the vehicle, so it is easy to secure a space in the instrument panel, but on the other hand,
Since the air-conditioning heat exchangers (evaporators, heater cores) are placed almost vertically in a narrow space in the front-rear direction of the vehicle, a blower duct that introduces blown air from the blower is installed on the front side of the evaporator. The need arises.
Similarly, on the vehicle rear side of the heater core, a blower duct section through which blown air that has passed through the heater core flows is required.

As described above, since the air duct portions are required before and after the evaporator and the heater core, there is a problem that the dimension in the vehicle front-rear direction becomes large. In addition, since the size in the vehicle front-rear direction becomes large, it is often difficult in terms of space to install a blowout mode switching unit that switches the blowout mode on the vehicle rear side of the heater core. Therefore, there is a case where the blowout mode switching unit is installed above the heater core 22.
In this case, since the blowout mode switching unit is further installed above the heater core which is set upright, there is a problem that the dimension in the height direction becomes large.

[0007] As described above, there is a problem that even in a center-placed layout, it is difficult to mount it on a vehicle and lacks versatility. Therefore, in view of the above points, the present invention has an object to provide an air conditioner for a vehicle, which can be easily mounted even in a narrow vehicle interior space by adopting a heat exchanger layout in pursuit of space efficiency. It is a thing.

Another object of the present invention is to secure a heat exchanger layout in pursuit of space efficiency, and at the same time, at the time of heating, to improve both the heating capacity by reducing the ventilation load and the anti-fog effect on the window glass. And

[0009]

In order to achieve the above object, the present invention employs the following technical means. Claims 1-6
In the described invention, the cooling heat exchanger (21) is arranged substantially horizontally on the instrument panel portion of the vehicle interior, and the blower (1
The blast air blown by 5) is used for cooling the heat exchanger (2
1) The cooling heat exchanger (2
Above the 1), there is a heating heat exchanger (2) for heating the blast air.
2) is arranged substantially horizontally, and the blowout mode is changed over to the air downstream side of the heating heat exchanger (22) to switch the blowing direction of the air heated by the heating heat exchanger (22) and adjusted in temperature. In the air conditioner unit case (30) in which the part (23) is arranged and the cooling heat exchanger (21) and the heating heat exchanger (22) are housed, the partition means (parallel to the blowing direction of the blowing air) 20A to 20C), and the partition means (20A to 20C) divides the air passage in the air conditioner unit case (30) into a first air passage (19a) and a second air passage (19b). It is characterized by having done.

According to the first to sixth aspects of the invention, both the cooling heat exchanger (21) and the heating heat exchanger (22) are arranged in a substantially horizontal direction so that they are vertically stacked. Therefore, the space of the heat exchanger in the vertical direction can be made very small, and as a result, the height dimension can be made sufficiently smaller than that of the conventional center placement unit. Moreover, since the space of the heat exchanger in the vertical direction can be made extremely small as described above, even if the blowing mode switching unit (23) for switching the blowing direction of the air is arranged above the heating heat exchanger (22). The vertical dimension of the air conditioner as a whole can be kept small.

Further, since the blast air is introduced from the lower side of the heat exchangers (21, 22) arranged in the substantially horizontal direction, and the blast air is led to the upper side, it is like a conventional center placement unit. Since it is not necessary to provide a ventilation duct part before and after the heat exchanger part, the size in the vehicle front-rear direction can be significantly shortened. From the above, the device of the present invention can be easily mounted on a vehicle, and its practical effect is great.

Furthermore, the air blow path in the air conditioner unit case (30) for accommodating the cooling heat exchanger (21) and the heating heat exchanger (22) is separated by partition means (20A to 20).
Since it is divided into the first air passage (19a) and the second air passage (19b) by C), while ensuring a space-efficient heat exchanger layout, the first and second air passages are also provided.
Blast air can be independently supplied to the air passages (19a, 19b). Therefore, the inside air and the outside air are caused to flow through one of the first and second air passages (19a, 19b), or the first and second air passages (19a, 19b).
It is possible to obtain such functions as adjusting the temperature of the air to different temperatures.

In particular, in the invention described in claim 4, the inside air and the outside air simultaneously introduced from the inside / outside air switching box (11) are
The air is blown separately by the blower (15), the outside air is blown to the first blower path (19a), the inside air is blown to the second blower path (19b), and the air from the first blower path (19a) is blown. The outside air is introduced into the defroster blowout air passage (28), and the second air
Since the inside air from the blower air passage (19b) is blown to the foot blowout air passageway (27), warm air with low humidity is blown to the defroster side and the inside air is blown to the foot blowout port (27b). Hot air with high temperature can be blown out by recirculation.

Therefore, at the time of heating, it is possible to improve both the heating capacity by reducing the ventilation load and the anti-fog effect on the window glass. Further, in the invention according to claim 5, among the partitioning means (20A to 20C), the partitioning means (20A, 20B) arranged on the windward side and the leeward side of the cooling heat exchanger (21) are used for cooling. Since it is arranged on the same plane as the tube wall surface of the tube (21f) of the heat exchanger (21), the blast air flow path is also used in the cooling heat exchanger (21) by using the tube wall surface of the tube (21f). Therefore, it is possible to surely prevent the mixture of the air in the first and second air passages (19a, 19b).

The reference numerals in parentheses of the above means indicate the correspondence with the specific means described in the embodiment described later.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment, a blower unit 1 of an air conditioner is offset in the vehicle width direction from a central portion of an instrument panel (not shown) in a vehicle compartment (in the case of a right-hand drive vehicle, it is offset to the left side in the vehicle width direction). ), And is arranged in the front part of the passenger seat.

As shown in FIG. 1, the blower unit 1 has an inside / outside air switching box 11 made of resin for switching and introducing the air inside the vehicle and the air outside the vehicle as shown in FIG. As shown in FIG. 3, the outside air introduction port 12 and the first and second inside air introduction ports 13a and 13b are opened. Inside the inside / outside air switching box 11, these inlets 12, 13a, 1
First and second inside / outside air switching doors 14a, 1 for opening / closing 3b
4b is installed. Here, the first inside / outside air switching door 14a is a rotary door having an arcuate circumferential surface,
The second inside / outside air switching door 14b is formed of a normal plate door.

A blower 15 is disposed below the inside / outside air switching box 11 as shown in FIG.
Is a resin centrifugal multi-blade fan (Sirocco fan) 15
a, 15b, a fan driving motor 16, and a scroll casing 17 made of resin. Here, the fan of the blower 15 is composed of a fan 15a having a large outer diameter on the motor 16 side and a fan 15b having a small outer diameter on the side opposite to the motor 16;
The rotation axis of the fan 5b is disposed so as to be directed substantially in the horizontal direction. The rotation of the fan 15a draws air from the inside / outside air switching box 11 through the first air suction port 18a, and the rotation of the fan 15b causes the inside / outside air switching box to rotate. Air is sucked from 11 through the second air suction port 18b.

The inside of the scroll casing 17 is
A first air passage 19a through which air blown by the fan 15a flows,
It is partitioned into a second air passage 19b through which the air blown by the fan 15b flows. Reference numeral 20 is a partition plate for partitioning the first air passage 19a and the second air passage 19b. As is understood from FIG. 2, the partition plate 20 is arranged in the vertical direction, the first air passage 19a and the second air passage 19b are partitioned in the vehicle front-rear direction, and extend in parallel from the vehicle left side to the vehicle right side. ing. Therefore, the blowing air also passes through each passage 19a,
19b is blown from the outlet of the scroll casing 17 in a substantially horizontal direction in parallel from the left side to the right side of the vehicle compartment.

The case of the blower unit 1 is divided into an inside / outside air switching box 11 part and a scroll casing 17 part, and the scroll casing 17 part is further divided into two parts in the left-right direction in FIG. Due to such case division, the doors 14a, 14b, the fan 15a,
15b and the like are incorporated in the case. Further, the partition plate 20 is a scroll casing 1 made of resin.
7 is formed integrally with the inner wall surface.

On the other hand, an air conditioner unit 2 incorporating a heat exchanger for air conditioning, which will be described later, is arranged at a substantially central portion of an instrument panel in a vehicle compartment. In this air conditioner unit 2, an evaporator (cooling) of a refrigeration cycle is installed. The heat exchanger 21) is installed in a substantially horizontal state as shown in FIG. 1, and blown air from the blower unit 1 is introduced from the lower side thereof.

A heater core (heating heat exchanger) 22 is installed in a substantially horizontal state on the air downstream side (upper side of the passenger compartment) of the evaporator 21.
The engine uses cooling water (warm water) as a heat source, and a blowing mode switching unit 23 is disposed above the heater core 22 in the cabin (downstream of air). Here, in this example, as a temperature control method of air conditioning, an air mix method of adjusting a mixing ratio of cold and hot air is adopted. As shown in FIG. 4, a lower portion of the heater core 22 in the vehicle interior (air upstream side). The ratio of the amount of hot air passing through the heater core 22 and the ratio of the amount of cold air bypassing the heater core 22 is adjusted in accordance with the degree of opening of the air mix doors 24a and 24b disposed on the side, thereby controlling the temperature of air blown into the vehicle interior. In addition, rotary doors having arc-shaped circumferential surfaces are used as the air mix doors 24a and 24b.

Instead of the air mix doors 24a and 24b, a hot water control valve for controlling the flow rate of hot water to the heater core 22 is provided, and the heater core 22 is controlled by this hot water control valve.
Of course, it is also possible to control the flow rate of hot water to the heater and adjust the amount of air heating by the heater core 22 to control the temperature of the air blown into the vehicle interior. Further, in the air conditioner unit 2 as well, the air passage inside thereof is provided with the partition plate 20.
A, 20B, and 20C divide the vehicle in the front-rear direction into a first air passage 19a and a second air passage 19b, and air flows through these air passages 19a and 19b independently.

The blowout mode switching unit 23 is for switching the blowout mode into the passenger compartment, and communicates with a center face (upper) outlet (not shown) that blows air toward the passenger's head inside the passenger compartment. A side face outlet air passage 26 that communicates with the center face outlet air passage 25 and a side face outlet (not shown), and a foot outlet 27 that blows out air toward the feet of the passenger in the passenger compartment.
a, and a defroster outlet air passage 28 communicating with a defroster outlet (not shown) for blowing air toward the window glass, and the plurality of outlet air passages 25, 27 are provided. , 28 are switched and opened and closed by door means.

In this example, as the door means for switching the blowing mode, as shown in FIG. 4, plate-like doors 29a, 29a are provided.
Although b and 29c are used, it goes without saying that a rotary door or a film door having an arc-shaped outer peripheral surface can also be used. In FIG. 4, the door 29a is a face door, and the door 29b is a defroster door.
The door 29c is a foot door, and FIG. 4 shows a door operation position in the foot mode. Although the foot outlet air passage 27 is not shown in FIG. 4, when the foot door 29c is operated to the position indicated by the two-dot chain line in FIG. 4, the entrance of the foot outlet air passage 27 is closed. ing. Further, as is well known, the side face blow-out air passage 26 is always in communication with the space inside the blow-out mode switching unit 23, and the side face blow-out air outlet 26 is operated by operating the blow-out grill provided in the side face blow-out port. Intermittent blowing air and adjusting the blowing direction are possible.

In this embodiment, the doors 29a, 29b, 2
By switching and opening and closing the plurality of outlet air passages 25, 27 and 28 by selecting the operation (rotation) position of 9c, the well-known face outlet mode, bi-level outlet mode, foot outlet mode, foot / defroster combined outlet mode, A plurality of blowing modes such as a defroster blowing mode can be selected.

The case 30 of the air conditioner unit 2
Is composed of a resin case divided into four parts in the vertical direction. That is, although detailed illustration is omitted, case 3
Reference numeral 0 denotes a lower case that houses the evaporator 21, an intermediate case that houses the heater core 22, and two front and rear upper cases that constitute the blowout mode switching unit 23. Equipment such as vessels and doors are incorporated. And the partition plates 20A, 20B,
20C is integrally formed on the inner wall surfaces of these resin cases.

The divided cases of the blower unit 1 and the air conditioner unit 2 are detachably connected by using a well-known elastic metal clip, a screw or the like. By the way, the evaporator 21 is arranged slightly inclined from the horizontal plane in order to improve the discharge property of the condensed water generated by the cooling action. That is, as shown in FIG.
The evaporator 21 is disposed so as to be inclined downward toward the front side (rightward in FIG. 1) of the blown air blown by the above.

Here, the inclination angle θ of the evaporator 21
Is preferably in the range of 10 to 30 ° so that the water holding capacity of the evaporator 21 itself is reduced. Further, the evaporator 21 has a structure as shown in FIGS. 5 and 6, for example, and is a tube 21f formed by laminating metal thin plates such as aluminum having excellent thermal conductivity and corrosion resistance in the left-right direction of FIG.
And a corrugated fin 21g is interposed between the tubes 21f to form a core portion (heat exchange portion).

On one end side (upper end side in FIG. 5) of the tube 21f, a tank portion 21e for distributing the refrigerant to the multiple tubes 21f and collecting the refrigerant from the multiple tubes 21f is arranged. The flow of the refrigerant in the tube 21f is made to make a U-turn at the other end of the. A refrigerant inlet (not shown) into which a gas-liquid two-phase refrigerant whose pressure is reduced by an expansion valve (pressure reducing means) not shown flows into the tank portion 21e and a refrigerant outlet (not shown) from which a gas refrigerant evaporated in the tube 21f flows out. ) Is provided. In addition,
When the evaporator 21 is incorporated in the air conditioner unit 2, the tank portion 21e is disposed on the left side of the vehicle as shown in FIG.

The tube 21 of the evaporator 21
f is arranged so as to extend in the same direction as the blowing direction of the blown air (direction from the left side to the right side in FIG. 1),
As a result, the condensed water is pressed on the surface of the tube 21f by the blown air to smoothly incline the forward end (the right end in FIG. 1).
I am going to move to. Here, the evaporator 21
The condensed water generated in 2 is discharged from a condensed water discharge pipe 21c provided below the evaporator 21 on the lower side (air upstream side) of the inclined forward end of the evaporator 21, and this pipe 21c is connected to the air conditioner unit 2 Is integrally formed at the bottom of a resin case 30 (see FIG. 1 below).

The evaporator 21 will be described in more detail with reference to FIGS. 5 and 6. The tube 21f is formed as a flat tube having a flat cross-sectional shape, and the tube 21f has a flat wall surface that is made of air. A large number of layers are stacked so that they are oriented substantially parallel to the flow. By stacking a large number of tubes 20 in this manner, the inside of the core portion of the evaporator 21 is divided into a large number of spaces by the tubes 21f.

A main air passage 20a is formed in the space defined by the tube 21f between the tube wall surfaces. Further, the fin 21g is provided in the main air passage 20.
It is arranged at a and is joined to the wall surface of the tube 21f by brazing. In addition, a well-known louver 21 for promoting heat exchange efficiency is provided on the folded plate surface of the fin 21g.
h is obliquely cut and raised, and this louver 21h allows ventilation between the plate surfaces of the fins 21g. The main air passage 20b is formed by the plate surface of the fin 21g.
Is further partitioned to form a sub air passage 21b.

The partition plates 20A and 20B arranged on the windward side and the leeward side of the evaporator 21 are arranged along the windward and leeward ends of one tube 21f in the central portion of the evaporator 21, and the partition plates are arranged. The plates 20A and 20B and the tube 21f at the central portion are arranged on the same plane. Therefore, the plate surfaces of the partition plates 20A and 20B and the tube 2
It extends in a straight line with the wall surface of 1f.

In this way, the ventilation direction on the windward side and the leeward side of the evaporator 21 and the ventilation direction on the main air passage 21a in the evaporator 21 coincide with each other.
Further, as shown in FIG. 4, the partition plate 20C arranged on the leeward side of the heater core 22 has a shape that is bent obliquely to the upper right side at the upper portion thereof, and the diagonal bending surface 20D of the partition plate 20C is A communication port 20E is provided to connect the first ventilation passage 19a and the second ventilation passage 19b.

The communication port 20E is opened and closed by the foot door 29c, and is fully closed in the foot mode and the foot / def combined mode, and is fully opened in the face mode and the defroster mode. In the bi-level mode, the communication port 20E is fully closed or partially opened. Then, as shown in FIG. 4, the center face outlet air passage 25 and the defroster outlet air passage 28 are arranged on the first ventilation passage 19a side, while the foot outlet air passage 27 is arranged on the second ventilation passage 19b side. There is. Further, although not shown in FIG. 4, the side face blow-out air passage 26 is arranged on the first air passage 19a side.

Next, the operation of the present embodiment having the above structure will be described. In FIG. 2, the air that has flowed in from the inside / outside air switching box 11 flows in the scroll casing 17 in a substantially horizontal direction by the blower fans 15a and 15b, and flows into the lower portion of the evaporator 21. Then, the blown air is dehumidified and cooled by the evaporator 21, flows further upward, is introduced into the heater core 22, and is heated here.

In this example, the air mix doors 24a and 24b are used as the air-conditioning temperature control means, and the air passing through the heater core 22 and the heater core 22 are bypassed depending on the opening degree of the air mix doors 24a and 24b. The desired blown-air temperature is created by adjusting the air flow rate of the generated air. Then, the conditioned air reheated to the desired temperature by the heater core 22 is distributed to predetermined outlets by the doors 29a to 29c of the outlet mode switching unit 23 of the upper case portion.

In this embodiment, with the above-mentioned structure, the following effects can be obtained. Since the evaporator 21 and the heater core 22 are both arranged in a substantially horizontal direction and have a layout in which the evaporator 21 and the heater core 22 are overlapped in the vertical direction, the space for the heat exchanger section in the vertical direction can be made very small, and as a result, the height is higher than that of the conventional center-mounted unit The dimensions can be made sufficiently small.

Further, since the blast air is introduced from the lower side of the heat exchangers (21, 22) arranged in a substantially horizontal direction, and the blast air is led to the upper side, it is like a conventional center placement unit. Since it is not necessary to provide a ventilation duct section before and after the heat exchanger section, the dimension in the vehicle front-rear direction can be significantly shortened. The evaporator 21 is inclined downward toward the front side in the air blowing direction of the air blown below.
Further, since the tubes 21f of the evaporator 21 are also arranged in the air blowing direction (the left-right direction in FIG. 1), the condensed water is pressed against the air on the surface of the tubes 21f to smoothly move the inclined forward end of the evaporator 21 ( (The right edge of Figure 1)
Gather and fall.

Then, the condensed water is discharged to the outside from the condensed water discharge pipe 21c located below the inclined forward end of the evaporator 21. Therefore, the condensed water is supplied to the evaporator 21
Can be discharged smoothly. Since the condensed water of the evaporator 21 flows down to the lower air upstream side, the falling condensed water is warmed by the blast air having a high temperature before cooling. Therefore, since the outer surface temperature of the case 30 does not decrease so much, the dew condensation on the case 30 is significantly reduced or disappears. Therefore, an insulator (heat insulating material) to be normally attached to the inside of the case is not used. It can be abolished and the cost can be further reduced.

The amount of water retention varies depending on the inclination angle θ when the evaporator 21 is installed, but the installation angle θ ranges from 10 to 10.
It has been found that the water retention amount to the evaporator 21 can be reduced by setting the angle to 30 °. Further, in the present embodiment, in the season that requires heating in winter, air is blown while separating the outside air from the inside air,
Performs heat exchange and blows out warm air that heats low-humidity outside air from the defroster side, and blows out warm air that heats inside air from the foot outlet 27a at the foot, exerting a two-layer flow function of inside and outside air It has the feature of doing.

The operation and effect of this two-layered internal / external air unit will be described below. In FIG. 3, when the first internal / external air switching door 14a is moved to the hatched position in the figure, this door 1
4a closes the first inside air introduction port 13a, and the outside air introduction port 12
To release. Similarly, when the second inside / outside air switching door 14b is operated to the hatched position in the figure, the door 14b opens the second inside air introduction port 13b.

Therefore, the fans 15a, 15 of the blower 15 are
When b rotates, the outside air from the outside air inlet 12 is sucked into the first air passage 19a through the first air inlet 18a,
Further, the inside air from the second inside air introduction port 13b is sucked into the second air passage 19b through the second air suction port 18b. That is, the outside air and the inside air can be separately sent to the first air passage 19a and the second air passage 19b.

Further, also in the air conditioner unit 2, the partition plates 20A to 20C partition the air passage into the first air passage 19a and the second air passage 19b, and at the leeward side of the heater core 22, Second air duct 19
Since the communication ports 19c of a and 19b are closed by the foot door 29c in the foot mode and the foot / diff combined mode, the outside air that has flowed into the first air passage 19a in both modes is the evaporator 21 and the heater core 22. After passing through the defroster air passage 28
Then, the air is blown toward the vehicle window glass and the vicinity of the upper body of the occupant through the side face air passage 26. Here, by heating the low-humidity outside air with the heater core 22 to generate hot air, the effect of preventing fogging of the vehicle window glass can be enhanced.

On the other hand, the inside air is blown into the second air passage 19b, and the inside air is heated by the heater core 22 to become warm air, which is blown from the foot outlet 27a to the foot of the passenger through the foot outlet air passage 27. . Therefore, when heating the foot of the passenger compartment, no ventilation load occurs due to the introduction of outside air,
Therefore, even under conditions where the temperature of the engine coolant flowing into the heater core 22 is not sufficiently high and does not rise (for example, when the diesel engine vehicle is idling), the heating effect can be enhanced.

Therefore, it is possible to realize both improvement of the anti-fog effect of the vehicle window glass and improvement of the heating effect. by the way,
As shown in FIG. 4, since the evaporator 21 has a large thickness (for example, about 90 mm) in the air flow direction (vertical direction in FIG. 4), the partition plate 20A for the evaporator 21 is
Depending on the arrangement of 20B, the first and second air ducts 19a, 1
There is a problem that the separability of the inside air and the outside air passing through 9b is deteriorated.

For example, in FIG. 5, the partition plate 20A,
20B is a direction orthogonal to the tube longitudinal direction (horizontal direction)
In the evaporator 21, the outside air and the inside air are mixed in the evaporator 21 by passing through the sub air passage 21b formed by the louver 21h. When the inside air is mixed into the first air passage 19a on the outside air side, the anti-fog effect of the window glass is reduced.

On the contrary, in the present embodiment, as described above, the partition plates 20A and 20B arranged on the windward side and the leeward side of the evaporator 21 are provided on the windward side of one tube 21f at the central portion of the evaporator 21, respectively. The partition plates 20A and 20B and the tube 21f at the central portion are arranged on the same plane so as to be arranged along the leeward end portion.
Therefore, the plate surfaces of the partition plates 20A and 20B and the tube 21f
Since it has a relationship that extends in a straight line with the wall surface of
Even inside the evaporator 21, the inside air and the outside air do not mix and pass while being separated.

Similarly, regarding the heater core 22, it is preferable to consider the separability between the inside air and the outside air. However, as shown in FIG. 4, the heater core 22 has a thickness in the air flow direction (vertical direction in FIG. 4). Since it is small (for example, about 27 mm), even if the partition plates 20B and 20C are arranged with respect to the heater core 22 even if the inside air and the outside air are mixed with each other, the adverse effect on the anti-fog effect of the window glass is small.

Therefore, in the arrangement example of FIG. 4, the heater core 2
The two tank portions 22a and 22b are arranged on both sides of the partition plates 20B and 20C, and the tube of the heater core 22 (not shown)
Since the partition plates 20B and 20C have a layout orthogonal to each other, a slight amount of mixing of the inside air and the outside air occurs through the louver portion of the corrugated fin (not shown) of the heater core 22, but a decrease in the anti-fog effect is practically caused. There is no problem.

In the above description, only the case where the outside air and the inside air are introduced at the same time is selected, but the operating positions of the two inside / outside air switching doors 14a and 14b are selected between the solid line position and the chain double-dashed line position in FIG. Therefore, the first and second air ducts 19
It is possible to select an all-outside-air mode in which outside air is introduced into both a and 19b, and an inside-inside air mode in which inside air is introduced into both the first and second air passages 19a and 19b. (Other Embodiments) The evaporator 21 is not limited to the above-described laminated type, and is a so-called serpentine type in which a multi-hole flat tube is formed in a meandering shape and corrugated fins are combined with the meandering tube. For example, other formats may be used.

Further, the air mix doors 24a and 24b are not limited to rotary type doors having an arcuate circumferential surface,
Of course, it is possible to use an ordinary flat plate door or the like. Further, in the above-described embodiment, the inside air and the outside air are blown into the air conditioner unit 2 independently to improve both the anti-fog effect of the window glass during heating and the improvement of the heating effect. The present invention is not limited to this. For example, it can be applied to a so-called left / right independent temperature control type automotive air conditioner that independently controls the temperature of the air blown to the driver's seat side and the passenger's seat side of the passenger compartment. In this case, since it is not necessary to separate the inside and outside air into two layers, the partition plate 20 in the blower unit 1 part becomes unnecessary. Similarly, it is not necessary to divide the fan into two fans 15a and 15b.

Further, in the bi-level mode, in which the blown air is simultaneously blown out from both the upper side blower outlet (face side blower outlet) and the lower side blower outlet (foot side blower outlet), the upper side blower is blown out. The present invention may be applied to an automobile air conditioner having a so-called upper / lower independent temperature control function of independently controlling the temperature of air blown from the outlet and the air outlet on the lower side.

Further, the present invention may be applied to an automotive air conditioner of a so-called front / rear independent temperature control system in which the temperature of blown air to the front seat side and the rear seat side of the vehicle compartment is independently controlled. In such a left / right, up / down, or front / rear independent temperature control system, the first and the second partitions partitioned by the partition plates 20A to 20C are used.
The air temperature of the second air passages 19a and 19b may be controlled by the independent control of the emmix doors 24a and 24b so that a predetermined air outlet is selected and blown out into the vehicle compartment.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a cross-sectional view of a blower unit portion in the apparatus of FIGS.

FIG. 4 is a cross-sectional view of an air conditioner unit in the device shown in FIGS.

FIG. 5 is a perspective view of an evaporator portion used in the embodiment of the present invention.

FIG. 6 is a sectional view taken along the line CC of FIG. 5;

[Explanation of symbols]

11 ... Inside / outside air switching box, 12 ... Outside air inlet, 13a, 13
b ... 1st, 2nd inside air inlet, 14a, 14b ... 1st,
Second inside / outside air switching door, 15 ... Blower, 15a, 15b
... fan, 17 ... scroll casing, 18a, 18
b ... 1st, 2nd air inlet, 19a, 19b ... 1st,
2nd ventilation path, 20, 20A, 20B, 20C ... Partition plate, 21 ... Evaporator, 22 ... Heater core, 23 ... Blowout mode switching part.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Sugi Hikari 1-1-1, Showa-cho, Kariya, Aichi Prefecture Nippon Denso Co., Ltd.

Claims (6)

[Claims] 1. A blower (15) for blowing conditioned air, which is arranged substantially horizontally on an instrument panel portion of a vehicle compartment,
Blower air blown by the blower (15) is introduced from the lower side, a cooling heat exchanger (21) that cools the blown air and guides it upward, and an upper part of the cooling heat exchanger (21). In the heating heat exchanger (2), which is arranged substantially horizontally and heats the blown air.
2) and is arranged on the air downstream side of the heating heat exchanger (22),
A blowout mode switching unit (2) that switches the blowout direction of the air that has been heated in the heating heat exchanger (22) and the temperature of which has been adjusted.
3), and a partitioning means (parallel to the blowing direction of the blowing air) inside the air conditioner unit case (30) that houses the cooling heat exchanger (21) and the heating heat exchanger (22). 20A to 20C), and the partition means (20A to 20C) divides the air passage in the air conditioner unit case (30) into a first air passage (19a) and a second air passage (19b). An air conditioning system for automobiles characterized by the above. 2. The blower (15) is offset from the center of the vehicle interior instrument panel portion in the vehicle width direction, and the air conditioner unit case (30) is substantially central to the vehicle interior instrument panel portion. The air conditioner for a vehicle according to claim 1, wherein the blowout mode switching unit (23) is disposed above the heating heat exchanger (22). 3. The partition means (20A to 20C),
The vehicle air conditioner according to claim 1 or 2, wherein the air conditioner unit case (30) is arranged so as to extend in a substantially vertical direction. 4. An inside / outside air switching box (11) for selectively introducing the inside air and the outside air is provided, and the inside / outside air switching box (11) is configured to be able to introduce the inside air and the outside air at the same time, and the blower ( 15) is the inside / outside air switching box (1
The inside air and the outside air introduced from 1) are separated, and the outside air is blown to the first air passage (19a) and the inside air is blown to the second air.
To the defroster blow-out air passage (28), and the inside air from the second blow passage (19b) is blown out to the foot. Air passage (2
The air conditioner for an automobile according to any one of claims 1 to 3, characterized in that the air is blown to (7). 5. A tube wall surface of a tube (21f) through which a refrigerant of the cooling heat exchanger (21) flows is in a direction parallel to air flowing in the first and second air passages (19a, 19b). Among the partitioning means (20A to 20C), the partitioning means (20A, 20B) disposed on the windward side and leeward side of the cooling heat exchanger (21) are the cooling heat exchangers. The air conditioner for an automobile according to any one of claims 1 to 4, wherein the tube (21f) of (21) is arranged in a portion located on the same plane as the tube wall surface. 6. The inside / outside air switching box (11) is disposed above the blower (15), and the inside of the inside / outside air switching box (11) is disposed below the blower (1).
A scroll casing (17) of 5) is arranged, and a centrifugal fan (15a, 15b) for blowing the air sucked from the inside / outside air switching box (11) is built in the scroll casing (17), The automotive air conditioner according to claim 5, wherein the blow-out portion of the scroll casing (17) is connected to an air flow path below the cooling heat exchanger (21).