JPH10250344A - Automobile air conditioning unit and automobile air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile air conditioning unit and an automobile air conditioner which can adjust the air temperature introduced into a foot blowing port and are excellent in draining function. SOLUTION: An evaporator 32 is arranged upperstream and a heater core 33 downstream and their respective air passing surfaces 32a, 33a are arranged in a nearly erected state. A bypass passage 35 and a cold wind passage 43 are formed near the heater core 33 and an air mix chamber C is formed in the vehicular upperside of the heater core 33 and a hot wind passage 41 is formed in the back surface side of the heater core. Two mix doors 34a, 34b are provided between the evaporator 32 and the heater core 33 and the temperature of the hot wind flowing in the foot blowing port 39 can be adjusted by a first mix door 34a.

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 a vertical type in which an evaporator (a condenser and a heat exchanger for cooling) and a heater core (a heat exchanger for heating) are arranged in an integrated unit. About integrated air conditioner.

[0002]

2. Description of the Related Art With an increase in the cooler mounting rate, it has been studied to house an evaporator and a heater core in one unit and abolish the conventional cooler unit, especially in a passenger car air conditioner. In contrast to a conventional horizontal air conditioner in which an intake unit, a cooler unit, and a heater unit are arranged in a horizontal line in the left-right direction of the vehicle, this type of automotive air conditioner is often called a vertical integrated air conditioner. .

[0003] Combining the cooler unit and the heater unit into one unit not only increases the foot space in the vehicle interior, but also reduces the material, manufacturing and assembly costs by integrating the units.

As a conventional vertical integrated air conditioner, an evaporator and a heater core are arranged substantially upright and arranged in the front-rear direction of a vehicle (for example, see Japanese Utility Model Laid-Open No. 57-5318). Are arranged substantially horizontally and arranged in the up-down direction of the vehicle (for example, see
No. 04,129).

[0005] As shown in FIG. 8, the former air conditioner has an air conditioner unit casing 31 and an air conditioner 32 and a heater core 3.
3 are provided in a substantially upright state, and the intake air from the intake unit is introduced into the casing 31 from an inlet 40 located in front of the vehicle. In addition, evaporator 3
A mix door 34a, a sub-mix door 34b and a bypass 35 are provided between the heater 2 and the heater core 33,
A vent outlet 37, a defrost outlet 38, and a foot outlet 39 are formed above the bypass passage 35.

In this type of air conditioner, air introduced from the inlet 40 flows toward the rear of the vehicle in the order of the evaporator 32 and the heater core 33. Note that "37
"D" is a vent door, "38D" is a differential door, "39D"
Is a foot door.

[0007]

However, in the conventional vertical integrated air conditioner shown in FIG. 1, since the foot outlet 39 is formed at a position where it is difficult to guide the cool air passing through the bypass 35, for example, a bi-level air conditioner is provided. In the mode, warm air mainly flows into the foot outlet 39,
There is a problem that the temperature difference between the cold air supplied to the upper body of the occupant and the warm air supplied to the feet becomes too large.

[0008] Although the problem of the temperature difference between the upper and lower sides can be solved by taking measures such as fine adjustment of the opening degree of the door and installation of air distribution ribs, the ventilation resistance increases in any of the methods. Therefore, there is a problem that the air volume is reduced, which is not preferable.

In a conventional vertical integrated air conditioner, the first
When the air is guided to the heater core 33 by opening the mixing door 34a, condensed water adhered to the surface of the evaporator 32 is carried together with the air, and accumulates on the bottom surface of the casing 31 in which the heater core 33 is installed. Become.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and provides a vertical integrated air conditioner capable of adjusting the temperature of the air guided to a foot outlet and having an excellent drainage function. The purpose is to provide.

[0011]

According to a first aspect of the present invention, there is provided an air conditioning unit for an automobile, wherein an evaporator and a heater core are arranged such that the evaporator is located upstream and the heater core is located downstream. An automotive air-conditioning unit having an air passage surface arranged substantially upright, wherein a warm air passage is formed on a rear side of the heater core, and a vent outlet is formed on a vehicle upper side of the warm air passage. In a vehicle air conditioning unit in which a foot outlet is formed on a lower side of a vehicle in a passage, in a vicinity of the heater core, a first bypass path that bypasses the heater core to reach the vent outlet, and bypasses the heater core. A second bypass passage leading to the hot air passage is formed, and the heater core and the second bypass are provided between the evaporator and the heater core. A first mixing door controls an amount of air flowing down the road, the heater core and the first
And a second mix door for controlling the amount of air flowing down to the bypass path.

In the vehicle air conditioning unit according to the first aspect, the air that has passed through the heater core and the air that has passed through the second bypass path are guided to the hot air passage formed on the back surface of the heater core. The air in the hot air passage is supplied to a vent outlet formed on the upper side of the vehicle and a foot outlet formed on the lower side of the vehicle.

Here, since the amount of air flowing down to the heater core and the second bypass passage is controlled by the first mix door, the temperature of the air flowing mainly to the foot outlet is adjusted by this.

On the other hand, since the amount of air flowing down to the heater core and the first bypass passage is controlled by the second mix door, the temperature of the air flowing mainly to the vent outlet is thereby adjusted.

Therefore, the temperature of the air flowing into each of the vent outlet and the foot outlet can be controlled almost independently by the second mix door and the first mix door.

As a result, for example, it is possible to set the upper and lower differential temperature in the bi-level mode to an appropriate temperature,
It is possible to prevent the temperature difference from becoming too large or too small.

Further, in the vehicle air conditioning unit according to the first aspect, since the mix door provided between the evaporator and the heater core is divided into two mix doors, the range required for rotation is small. I'm done. That is, the dimension between the evaporator and the heater core can be set short, and as a result, an air conditioning unit that is short in the vehicle front-rear direction can be provided.

Further, in the vehicle air conditioning unit according to the first aspect, the foot air outlet is formed below the vehicle in the hot air passage, so that the warm air passing through the heater core can be guided to the foot air outlet as it is. It is possible to omit a foot blow duct of a separate component which is required when it is formed on the upper side.

In the automotive air conditioner unit according to the first aspect, the set position of the second bypass passage is not particularly limited, but the vehicle air conditioner unit according to the second aspect is configured such that the second bypass passage is provided with the heater core. The bottom surface of the air conditioning unit casing which is formed on the lower side of the vehicle and forms the second bypass path is inclined downward toward the evaporator.

In the vehicle air conditioning unit according to the second aspect, since the bottom surface of the air conditioning unit casing constituting the second bypass is inclined downward toward the evaporator, condensed water scattered from the evaporator is removed. The air flows in the direction of the evaporator along the bottom surface of the second bypass path. Since a water distribution pipe is usually provided near the evaporator, the scattered water can be drained out of the system.

In the automotive air conditioning unit according to the first or second aspect, the set position of the air mix chamber is not particularly limited, but the automotive air conditioning unit according to the third aspect is arranged above the heater core and the hot air passage above the vehicle. An air mix chamber is formed.

Since a heater core for an automobile is generally smaller than an evaporator, when the evaporator and the heater core are arranged in a substantially upright state with their bottoms aligned, a space is created above the heater core in the vehicle. In the automotive air conditioning unit according to the third aspect, by utilizing this space and forming an air mix chamber here,
A small air conditioning unit is provided by effectively utilizing the space.

According to a fourth aspect of the present invention, in the automotive air conditioning unit, the vent door completely closes the hot air passage in a full cool mode.

In the air conditioning unit for an automobile according to the fourth aspect, the air mix chamber is formed above the heater core in the vehicle, and the hot air passage is formed on the back side of the heater core. Although the air warmed on the back surface rises in the hot air passage and tries to flow into the air mix chamber, since the vent door can fully close the hot air passage, the mixing of the warm air can be prevented. As a result, the cool air that has flowed down from the bypass path is supplied to the room while maintaining the same temperature without being warmed at all, thereby preventing a decrease in cooling capacity at low cost.

[0025] In the automotive air conditioning unit according to any one of claims 1 to 4, the set position of the defrost air outlet is not particularly limited. An outlet is formed.

Since the automotive air conditioning unit is mounted near the center console of the instrument panel, it is desirable that the defrost outlet connected to the defrost grille be located very close to the instrument panel. For this reason, in the vehicle air conditioning unit according to the fifth aspect, the defrost air outlet is formed on the upper side of the vehicle in the air mix chamber, thereby shortening the duct leading to the defrost grille as much as possible.

In the automotive air conditioning unit according to the first to fifth aspects, the orientation of the evaporator and the heater core when the vehicle is mounted on the vehicle and the set position of the inlet of the air introduced into the air conditioning unit are not particularly limited. The evaporator and the heater core are disposed such that the evaporator and the heater core are located on the front side of the vehicle and the heater core is located on the rear side of the vehicle, and the respective air passage surfaces thereof are directed substantially in the front-rear direction of the vehicle. An inlet for intake air is formed on the front side.

With this configuration, the air flow path in the air conditioning unit is formed linearly from the front side to the rear side of the vehicle, so that an air conditioning unit having a small airflow resistance can be provided. Further, since the size in the vehicle front-rear direction can be reduced by doing so, a wide entrance capable of sufficiently reducing the ventilation resistance can be set at the vehicle front side of the evaporator.

An air conditioner for an automobile which can exhibit the above-described effects by combining the air conditioning unit for an automobile according to any one of claims 1 to 6 and an intake unit having a blower and arranging them in the left-right direction of the vehicle. Is provided.

[0030]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a mounted state of an automotive air conditioner of the present invention, and FIG. 2 is a longitudinal sectional view showing an embodiment of an automotive air conditioning unit of the present invention.

As shown in FIG. 1, the air conditioner 100 for an automobile according to the present embodiment includes an intake unit 10 and an air conditioning unit 30, each having an intake unit casing 11 and an air conditioning unit casing 31, and these are ducts. (Not shown). These units 10 and 30 are mounted in the left and right direction along the dash panel DP within the instrument panel IP of the vehicle. Although not particularly limited, the intake unit 10 is attached to the back of the instrument panel IP located at the foot of the passenger seat, and the air conditioning unit 30
Is attached to the center console CC located at the center of the vehicle. In a left-hand drive vehicle, it is mounted symmetrically with respect to FIG.

The intake unit casing 11 includes:
An outside air intake 12 for taking in air outside the vehicle compartment and an inside air intake 13 for circulating room air are formed. The inside air inlet 13 is formed directly in the intake unit case 11 while the outside air inlet 12 is
It communicates with an inlet formed in the cowl panel of the vehicle body through an air duct (both not shown).

Although not shown, the intake unit case 11 has an intake door rotatably provided at a position where the outside air intake 12 is fully closed (inside air circulation mode).
And a position (the outside air intake mode) where the inside air intake 13 is fully closed, and stops at an intermediate position (the inside / outside air intake mode) as necessary. This rotation of the intake door is performed by an intake door actuator attached to the intake unit case 11 or a manual wire. The intake of inside air and / or outside air is performed by a fan rotated by a fan motor.

As shown in FIG. 2, an inlet 40 of the air blown from the intake unit 10 via a duct is formed in the air conditioning unit casing 31 on the side of the casing 31 on the front side of the vehicle. FIG. 2 is a longitudinal sectional view when the air conditioning unit 30 is viewed from the passenger seat side in FIG.

An evaporator 32 for cooling the intake air is provided near the inlet 40 so as to be substantially upright and the air passage surface 32a is directed in the front-rear direction of the vehicle. The evaporator 32 is one element of a cooling cycle configured by connecting the compressor, a condenser (evaporator), an expansion valve, a liquid tank, and the like with a refrigerant pipe.
In addition, since the main parts such as the compressor, condenser, and liquid tank are provided in the engine room,
These and the evaporator 32 are connected through the dash panel DP by refrigerant piping. The operation and stop of the cooling cycle are performed by an air conditioner switch of a control panel provided on an instrument panel IP in the vehicle compartment.

On the rear side of the evaporator 32 in the air conditioning unit case 31, a heater core 33 is provided.
5 are provided substantially upright. The heater core 33 is also provided with the air passage surface 33a facing the vehicle front-rear direction. The engine coolant of the vehicle circulates through the heater core 33, and the air is heated by heat exchange between the engine coolant and the air.

In particular, in the air conditioning unit 30 of the present embodiment,
As will be described later, since a countermeasure against warm air at the time of full cooling is taken, a hot water valve provided in the engine cooling water pipe can be omitted.

In the air conditioning unit 30 of this embodiment, two mix doors 34a and 34b are provided between the evaporator 32 and the heater core 33. The first mix door 34a located on the lower side of the vehicle controls the amount of air flowing down to the heater core 33 and a cool air passage 43 described later, whereas the second mix door 34a located on the upper side of the vehicle is controlled.
b controls the amount of air flowing down to the heater core 33 and the bypass 35.

The two mixed doors 34a, 34b
Is rotated in conjunction with mechanically (for example, a link mechanism) or electrically (for example, an actuator motor and a controller) or independently, whereby the ratio of the amount of air passing through the heater core 33 to the amount of air passing through the bypass passage 35 is increased. Is adjusted.

In the air conditioning unit 30 of the present embodiment, the mix door provided between the evaporator 32 and the heater core 33 is divided into a first mix door 34a and a second mix door 34b. As compared with the case where temperature control is performed with a single mixed door, the range required for rotation can be reduced. That is, the dimension in the vehicle front-rear direction between the evaporator 32 and the heater core 33 can be set short, and as a result, the air conditioning unit 30 that is short in the vehicle front-rear direction can be set.
Can be provided.

The air conditioning unit 30 of the present embodiment cools the air blown from the intake unit 10 by the above-described evaporator 32, then controls the temperature by the heater core 33, and adjusts the vehicle interior from a desired outlet. It has a function to distribute air. For this purpose, an air mix chamber C is formed above the heater core 33 of the air conditioning unit case 31 on the vehicle side.
A warm air passage 41 for guiding the warm air that has passed through to the air mix chamber C or the foot outlet 39 is formed on the back surface of the heater core 33.

In addition, in the air conditioning unit of the present embodiment, in particular, a cool air passage (second bypass passage) 43 is formed below the heater core 33, and the first mix door 3 is provided.
When 4 a is other than fully opening the heater core 33, the cool air from the evaporator 32 passes through the cool air passage 43 and is guided to the warm air passage 41. The cool air passage 43 is configured to independently vary the temperature of the air blown out from the foot outlet 39. For example, in the bilevel mode or the like,
The temperature difference between the cool air from the vent outlet 37 and the warm air from the foot outlet 39 is adjusted.

The bottom surface 31a of the cool air passage 43 is constituted by the bottom wall 31a of the air conditioning unit casing 31. In the present embodiment, the bottom surface 31a is formed to be inclined downward toward the evaporator 32. ing.
As a result, the first or second mixed door 34a, 3
Even if condensed water scatters from the evaporator 32 and accumulates on the bottom surface 31a when the rotary shaft 4b is rotated, the condensed water is discharged from the drain pipe 31 formed near the evaporator 32.
Since it is led to b, there is no need to provide a separate drain pipe.

A vent outlet 37 and a defrost outlet 38 are formed in the air mix chamber C. The vent outlet 37 is connected to a vent grill provided in front of the instrument panel IP in the vehicle compartment via an air duct or directly, and blows out conditioned air mainly toward the upper body of the occupant.

The defrost outlet 38 is communicated with a defrost grill provided on the upper surface of the instrument panel IP through an air duct or directly, and blows low humidity air or warm air toward the inner surface of the windshield to remove fogging. Clear up.

On the other hand, the foot outlet 39 is connected to the hot air passage 41.
Is formed under the vehicle and opens under the feet of the occupant in the vehicle interior,
Warm air is mainly blown toward the feet of the occupants.

Vent outlet 37, defrost outlet 38
And the foot outlet 39 has a vent door 37, respectively.
D, a differential door 38D, and a foot door 39D are provided to open and close respective outlets.

These doors 37D, 38D, 39D are
It is operated by a mode door actuator or a manual wire via a link mechanism or the like. In other words, vent mode,
By selecting various blowing modes such as a defrost mode, a bi-level mode, and a foot mode, three doors 37D,
These doors operate according to the combination of opening and closing of 38D and 39D.

For example, in the bi-level mode, the vent outlet 37 and the foot outlet 39 are each half-opened,
Cool air is blown out from the vent outlet 37 and warm air is blown out from the foot outlet 39, so that a so-called head-and-foot-type thermal control is performed.

In the air conditioning unit 30 of the present embodiment, the vent door 37D has a structure capable of not only opening and closing the vent outlet 37 but also closing the upper end of the hot air passage 41. Specifically, as shown in the figure, a rib 42 with which the tip of the vent door 37D can contact is formed at the upper end of the heater core 33. On the vent door 37D side, in addition to the conventional three positions of the fully closed position, the half open position, and the fully closed position of the vent outlet, a stop position for fully closing the hot air passage is added by a link mechanism or an actuator. ing. This configuration is not essential in the present invention.

Next, the operation will be described. 3 shows the air flow in the vent mode, FIG. 4 shows the air flow in the foot mode, FIG. 5 shows the air flow in the bi-level mode, FIG. 6 shows the air flow in the defrost mode, and FIG.

Vent Mode In a vent mode in which cooling or temperature control is generally performed, as shown in FIG. 3, the defrost outlet 38 and the foot outlet 39 are fully closed, and the vent outlet 37 is fully opened.
The hot air passage 41 is fully closed. That is, the vent door 37
D is the maximum rotation position. The first mix door 34a fully closes the heater core 33, the second mix door 34b fully closes the heater core 33, and the bypass path 35
Is fully opened.

By doing so, the intake unit 10
The intake air introduced into the inlet 40 from the evaporator 3
While passing through the second air passage surface 32a, the air flows toward the rear side of the vehicle, and mainly reaches the bypass passage 35 and directly flows into the vent outlet 37. Here, a part of the cold air flowing down from the evaporator 32 reaches the warm air passage 43 through the cool air passage 43, but the warm air passage 41 has an upper end formed by a vent door 37D and a lower end formed by a foot door 39D. Since the air is closed, when the internal pressure of the hot air passage 41 increases, no more air flows in.

As described above, in the vent mode, the air is warmed on the back surface of the heater core 33 (that is, on the side of the hot air passage 41).
Since it is closed by 7D, only the cool air from the evaporator 32 flows into the vent outlet 37, and as a result, the cooling capacity is ensured only by the modification of the vent door 37D.

Further, since the air flow path from the inlet 40 to the vent outlet 37 is formed in a substantially straight line, the air flow resistance is extremely small, and a large amount of cold air can be supplied to the room. Here, if the second mix door 34b is constituted by a butterfly door, the cool air passing therethrough can be deflected to the vent outlet 37, and the reduction of the ventilation resistance is further promoted.

In the foot mode in which heating is generally performed, as shown in FIG. 4, the defrost air outlet 38 and the vent air outlet 37 are provided.
Is fully closed, and the foot outlet 39 is fully opened. Further, the first mix door 34a completely closes the cool air passage 43, and the second mix door 34b completely closes the bypass passage 35.

By doing so, the intake unit 10
The intake air introduced into the inlet 40 from the evaporator 3
While flowing through the second air passage surface 32 a, the air flows toward the rear side of the vehicle, and all flows to the heater core 33. Then, the air that has become hot air through the air passage surface 33a of the heater core 33 flows from the hot air passage 41 into the foot outlet 39,
Supplied to the crew's feet.

As described above, even in the foot mode, the air flow path from the inlet 40 to the foot outlet 39 is formed substantially linearly, so that the airflow resistance is extremely small.
A large amount of warm air can be supplied to the room.

[0059] bi-level mode On the other hand, in the intermediate temperature air temperature regulation mode is a by bi-level mode for supplying the (temperature control / bi-level mode), as shown in FIG. 5, a defrost outlet 38 is fully closed , The vent outlet 37 and the foot outlet 39 are opened halfway. Also, the first and second mixed doors 34a, 34a, 3
Reference numerals 4b denote substantially intermediate positions.

Thus, the intake air introduced from the intake unit 10 to the inlet 40 flows toward the rear side of the vehicle while passing through the air passage surface 32a of the evaporator 32. The air is guided to the bypass passage 35, the air guided to the heater core 33, and the air guided to the cool air passage 43 by the 34a and the second mix door 34b.

The cold air branched to the bypass passage 35 collides with the warm air that has passed through the heater core 33 and ascended in the hot air passage 41 in the air mixing chamber C. As a result, the mixture is brought to an appropriate temperature, and then the vent outlet 37
And air at an appropriate temperature is supplied to the upper body of the occupant. Also, warm air that has passed through the heater core 33,
The cool air that has passed through the cool air passage 43 is mixed in the warm air passage 41, flows into the foot outlet duct 42 in a state where the temperature is slightly lowered, and air having a higher temperature than the vent outlet duct flows from the foot outlet 39 to the feet of the occupant. Supplied. However, since the cool air passage 43 is provided, an extreme temperature difference is avoided.

As described above, in the temperature control / bi-level mode, the cool air that has passed through the bypass passage 35 and the warm air that has risen through the heater core 33 collide in a substantially right angle direction, so that the mixing property is low. The conditioned air having a higher temperature and a uniform temperature is supplied to the room. In addition, by the presence of the cold air passage 43, the magnitude of the bi-level differential temperature can be adjusted, and the temperature control of the head cold feet according to the environment can be realized.

Defrost Mode In the defrost mode in which warm air is mainly blown onto the inner surface of the windshield to remove fogging, the vent outlet 37 and the foot outlet 39 are fully closed as shown in FIG. 38 is fully opened. Also,
The first mix door 34a completely closes the cold air passage 43,
The second mix door 34b completely closes the bypass 35.

By doing so, the intake unit 10
The intake air introduced into the inlet 40 from the evaporator 3
While flowing through the second air passage surface 32 a, the air flows toward the rear side of the vehicle, and all flows to the heater core 33. The air that has become hot air through the air passage surface 33a of the heater core 33 flows from the hot air passage 41 into the defrost outlet 38, and is supplied to the inner surface of the windshield.

As described above, even in the defrost mode, the air passage from the inlet 40 to the hot air passage 41 is formed substantially linearly, and the air passage from this to the defrost outlet 38 has almost no ventilation resistance. A large amount of hot air can be supplied to the inner surface of the windshield, and safety is further improved.

Differential / Foot Mode On the other hand, in a differential / foot mode in which the temperature of the room is controlled while clearing the fogging of the glass, as shown in FIG. 7, the vent outlet 37 is fully closed, the defrost outlet 38 and the foot are closed. The outlet 39 is opened halfway. In addition, the first and second mix doors 34a and 34b are respectively set at substantially intermediate positions.

In this way, the intake air introduced from the intake unit 10 to the inlet 40 flows toward the rear of the vehicle while passing through the air passage surface 32a of the evaporator 32. The air is guided to the bypass passage 35, the air guided to the heater core 33, and the air guided to the cool air passage 43 by the 34a and the second mix door 34b.

The cold air branched to the bypass passage 35 collides with the warm air that has passed through the heater core 33 and has risen in the warm air passage 41 in the air mixing chamber C. As a result, the mixture is brought to an appropriate temperature, and then flows into the defrost blow-off port 38, and the air at an appropriate temperature is supplied to the inner surface of the windshield. Further, the warm air that has passed through the heater core 33 and the cool air that has passed through the cool air passage 43 are mixed in the warm air passage 41, flow into the foot outlet duct 42 with the temperature slightly lowered, and have a higher temperature than the defrost outlet. Air is supplied from the foot outlet 39 to the feet of the occupant. However, since the cool air passage 43 is provided, an extreme temperature difference is avoided.

As described above, even in the differential / foot mode, the cool air that has passed through the bypass 35 and the heater core 33
The hot air that has risen through the air collide with the hot air in a substantially right angle direction, so that the mixing property is enhanced and the temperature-controlled air having a uniform temperature is supplied to the room. In addition, the presence of the cold air passage 43 allows the magnitude of the differential / foot differential temperature to be adjusted, and realizes temperature control according to the environment.

The embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[0071]

As described above, according to the present invention, since the temperature of the air guided to the foot outlet can be adjusted, for example, the upper and lower temperature difference in the bilevel mode can be set to an appropriate temperature. This makes it possible to prevent the temperature difference from becoming too large or too small.

Further, since the condensed water scattered from the evaporator flows along the bottom surface of the second bypass passage toward the evaporator, the scattered water is drained out of the system from a drain pipe provided near the evaporator. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounted state of a vehicle air conditioner of the present invention.

FIG. 2 is a longitudinal sectional view showing an embodiment of the automotive air conditioning unit of the present invention.

FIG. 3 is a longitudinal sectional view showing a vent mode of the air conditioning unit of FIG. 2;

FIG. 4 is a vertical sectional view showing a foot mode of the air conditioning unit of FIG. 2;

FIG. 5 is a longitudinal sectional view showing a bi-level mode of the air conditioning unit of FIG. 2;

FIG. 6 is a longitudinal sectional view showing a defrost mode of the air conditioning unit of FIG. 2;

FIG. 7 is a longitudinal sectional view showing a differential / foot mode of the air conditioning unit of FIG. 2;

FIG. 8 is a longitudinal sectional view showing a conventional vertical integrated air conditioning unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Intake unit 30 ... Air conditioning unit 31 ... Casing 32 ... Evaporator 32a ... Air passage surface 33 ... Heater core 33a ... Air passage surface 34a ... 1st mix door 34b ... 2nd mix door 35 ... Bypass path (1st bypass) (Road) 37 ... Vent outlet 38 ... Defrost outlet 39 ... Foot outlet 40 ... Inlet 41 ... Hot air passage 42 ... Rib 43 ... Cold air passage (second bypass passage) C ... Air mix chamber IP ... Instrument panel CC … Center console DP… Dash panel

Claims (7)

[Claims] An evaporator (32) and a heater core (33) have an evaporator upstream and a heater core downstream, and a respective air passage surface (32).
a, 33a) is arranged so as to be substantially upright, wherein a warm air passage (41) is formed on the back side of the heater core, and on a vehicle upper side of the warm air passage (41). A vent outlet is formed, and a foot outlet (39) is provided below the vehicle in the warm air passage.
In the automotive air conditioning unit, a first bypass path (35) that bypasses the heater core and reaches the vent outlet is provided near the heater core, and a hot air path that bypasses the heater core. A second bypass passage (43) is formed, and between the evaporator (32) and the heater core (33), a first mix door for controlling an amount of air flowing to the heater core and the second bypass passage. (34
a) and a second mix door (34) for controlling the amount of air flowing down to the heater core and the first bypass path.
(b) an air conditioning unit for a vehicle, characterized in that: 2. The second bypass passage (43) is formed below the heater core in the vehicle, and forms a bottom surface (3) of an air conditioning unit casing (31) that constitutes the second bypass passage.
2. The vehicle air conditioning unit according to claim 1, wherein 1a) is inclined downward toward the evaporator (32). 3. 3. The air conditioning unit according to claim 1, wherein an air mixing chamber (C) is formed above the heater core (33) and the hot air passage (41). 4. A vehicle air conditioning unit according to claim 1, wherein a vent door (37D) for opening and closing the vent outlet (37) can completely close the hot air passage (41). . 5. An air conditioning unit for a vehicle according to claim 3, wherein a defrost air outlet (38) is formed above the air mix chamber (C) in the vehicle. 6. The evaporator (32) and the heater core (33) have the evaporator facing the vehicle front and the heater core facing the vehicle rear, and have their respective air passing surfaces (32a, 33a) extending substantially in the vehicle longitudinal direction. The air conditioning unit for a vehicle according to any one of claims 1 to 5, wherein an intake air inlet (40) is formed on a front side of the evaporator (32). 7. An air conditioner for an automobile, wherein the air conditioning unit (30) for an automobile according to any one of claims 1 to 6 and an intake unit (10) having a blower are arranged along the lateral direction of the vehicle. .