JP2001315521A - Air conditioning unit of air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning unit capable of being miniaturized and preventing the rise of a temperature of the blowout air in full-cooling. SOLUTION: In this air conditioning unit for an automobile comprising an evaporator 1, a heater core 2 located at a rear side H in the vehicle longitudinal direction of the evaporator 1, a main air mixing door 3 adjusting a ratio of the air passing through the heater core 2 and the air not passing therethrough, a cooling air bypass passage 6 where the air bypassing the heater core 2 flows, a hot air passage 7 where the air passing through the heater core 2 flows, a sub-mixing door 8 adjusting an amount of the air passing through the hot air passage 7, and a unit case 9 accommodating these things, a butterfly door is applied to the main air mixing door 3, and a ventilation resistor 11 is placed oppositely to a front end face 10 of the heater core 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner unit for a vehicle air conditioner, and more particularly, to a vehicle air conditioner in which heat exchangers for cooling and heating are arranged in the front-rear direction of the vehicle.

[0002]

2. Description of the Related Art FIG. 7 is a longitudinal sectional view of an air conditioner unit of a conventional automotive air conditioner.

[0003] The air conditioner unit includes an evaporator 5.
01, a heater core 502 located behind the evaporator 501 in the vehicle longitudinal direction H,
2, a main air mix door 503 for adjusting the ratio of air passing through and non-passing air, a cool air bypass passage 506 through which air bypassing the heater core 502 flows, and a hot air passage 507 through which air passing through the heater core 502 flows.
And a submix door 508 for adjusting the amount of air passing through the hot air passage 507, and a unit case 509 for accommodating the submix door 508.

[0006] A blower unit (not shown) is connected to the unit case 509.

[0005] The main air mix door 503 is located between the evaporator 501 and the heater core 502. The main air mix door 503 has a shaft 504 and a flat door body 505. End 505 of door body 505
a is attached to the shaft 504, and the door body 505 is
4 can be rotated.

[0006] The submix door 508 has a hot air passage 507.
Is located downstream of

In the unit case 509, an air mix space 518 is formed in which air downstream of the cool air bypass passage 506 and air downstream of the hot air passage 507 are mixed. The air mix space 518 is located downstream of the main air mix door 503.

The unit case 509 is provided with a differential blowing opening 519, a vent blowing opening 520, and a foot blowing opening 521 downstream of the air mix space 518. Also, a side surface portion (not shown) of the unit case 9
Is formed with an air inlet 525. A drain port 513 for discharging condensed water that has flowed down from the evaporator 501 is formed in the bottom portion 509a of the unit case 509.

Each outlet opening 5 in unit case 509
19, 520, 521, the mode switching door 52
2, 523 and 524 are provided rotatably.

Next, the operation of the air conditioner unit will be described.

When the blower unit operates, air flows into the unit case 509 through the air inlet 525. This air goes to the evaporator 501.

When the blow mode is set to the bi-level mode and the opening of the main air mixing door 503 is 50% and the opening of the sub mix door 508 is 100%, part of the air passing through the evaporator 501 is cooled by a cool air bypass. Through the passage 506 toward the air mix space 518, the rest toward the heater core 502. The air is the evaporator 50
As it passes through 1, it is cooled. In addition, evaporator 5
01 flows down to the bottom portion 509 a of the unit case 509, and flows out from the drain port 513 to the unit case 5.
09 is discharged outside.

The air that has passed through the heater core 502 passes through the hot air passage 507 to the air mixing space 518. As the air passes through heater core 502, it is heated.

The air downstream of the cool air bypass passage 506 and the air downstream of the hot air passage 507 are mixed in an air mixing space 518.
And are mixed, and are blown out of the unit case 509 from the vent blowout opening 520 and the foot blowout opening 521.

The blowing mode is set to the face mode,
When the main air mix door 503 shuts off the upstream of the heater core 502 and the sub mix door 508 shuts off the downstream of the heater core (when set to full cool), all the air passing through the evaporator 501 passes through the cool air bypass passage 506. Then, the air is blown out of the unit case 509 from the vent blowing opening 520.

FIG. 8 is a longitudinal sectional view of an air conditioner unit of another conventional vehicle air conditioner.

Parts common to those in the conventional example of FIG. 7 are denoted by the same reference numerals, and description thereof is omitted.

In the conventional example shown in FIG. 7, a shaft 50 is attached to an end 505a of a door body 505 as a main air mixing door 503.
In contrast to the conventional door, a butterfly type door having a shaft 604 mounted on an intermediate portion 605b of a door body 605 is used as the main air mixing door 603.

The main air mix door 603 is located above the heater core 2 in the vehicle vertical direction V. Door body 60
5 is rotatable about an axis 604.

[0020]

In the conventional example shown in FIG. 7, at the time of full cooling, the main air mixing door 503 and the sub mixing door 508 shut off the upstream and downstream of the heater core 502. 502. However, since the rotation radius of the main air mixing door 503 is large, the rotation space is also large, and the evaporator 501 and the heater core 50
The distance between the air conditioner and the air conditioner increases, and the air conditioner unit becomes large.

In the conventional example shown in FIG. 8, a butterfly type door is used as the main air mix door 603, so that the rotation radius of the main air mix door 603 is small, so that the rotation space is also small. Therefore, the interval between evaporator 501 and heater core 502 can be reduced, and the air conditioner unit can be downsized. However, since the upstream side of the heater core 502 is always open and is opposed to the evaporator 501, a part of the air that has passed through the evaporator 501 at the time of full cooling is indicated by an arrow A in FIG.
As shown by, it passes through the heater core 502, returns to the evaporator 501 side again, and enters the cool air bypass passage 506. As a result, the temperature of the air blown out from the vent blowout opening 520 increases. Therefore, there has been a problem that the comfort during full cooling is impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to provide an air conditioner unit which can be reduced in size and can prevent an increase in blown air temperature at the time of full cooling. It is.

[0023]

According to the present invention, there is provided an air conditioner unit for an automotive air conditioner, comprising: a cooling heat exchanger; and a rear side of the cooling heat exchanger in a longitudinal direction of the vehicle. A heating heat exchanger located on the side, a main air mixing door for adjusting the ratio of air passing through the heating heat exchanger and air not passing therethrough, and cold air in which air bypassing the heating heat exchanger flows. A vehicle having a bypass passage, a hot air passage through which the air that has passed through the heating heat exchanger flows, a submix door that adjusts the amount of air that passes through the hot air passage, and a unit case that accommodates them. In the air conditioner unit of the air conditioner, the main air mix door is a butterfly type door, and a ventilation resistor is disposed to face a front end face of the heating heat exchanger in the vehicle front-rear direction. And it features.

Since the main air mix door is a butterfly type door, the upstream side of the heating heat exchanger is always open. However, since the ventilation resistor is disposed opposite to the front end face of the heating heat exchanger in the vehicle front-rear direction, a part of the air passing through the cooling heat exchanger passes through the heating heat exchanger during full cooling. And the airflow resistor prevents it from returning to the cooling heat exchanger. Therefore, the amount of warm air mixed into the cool air bypass passage decreases, and the temperature of the air blown out of the unit case does not increase.

According to a second aspect of the present invention, there is provided an air conditioner unit for an automobile air conditioner, wherein the airflow resistor is a mesh plate. .

As described above, since the ventilation resistor is a mesh-shaped plate, a part of the air that has passed through the cooling heat exchanger during full cooling passes through the heating heat exchanger, or is cooled again. The return to the heat exchanger side is prevented by the mesh plate as the ventilation resistor. Therefore, the amount of warm air mixed into the cool air bypass passage decreases, and the temperature of the air blown out of the unit case does not increase.

According to a third aspect of the present invention, there is provided an air conditioner unit for an automotive air conditioner, wherein the ventilation resistor is a plate provided with innumerable pores. It is characterized by.

As described above, since the ventilation resistor is a plate provided with innumerable pores, a part of the air passing through the cooling heat exchanger may pass through the heating heat exchanger during full cooling. Then, the plate having a myriad of pores as a ventilation resistor prevents return to the cooling heat exchanger side again. Therefore, the amount of warm air mixed into the cool air bypass passage is reduced,
The temperature of the air blown out of the unit case does not increase.

According to a fourth aspect of the present invention, there is provided an air conditioner unit for an automobile air conditioner according to the second or third aspect, wherein a portion of the entire ventilation resistor which receives a high wind pressure is provided. The size of the mesh or the pores is reduced, and the size of the mesh or the pores is increased in a portion receiving a low wind pressure.

As described above, the size of the mesh or the pores is reduced in the portion of the entire ventilation resistor that receives a high wind pressure, and the size of the mesh or the pores is increased in the portion that receives a low wind pressure. Thus, the pressure distribution on the front end face of the heating heat exchanger in the vehicle front-rear direction becomes substantially uniform. Thus, the air passing through the heating heat exchanger is rectified. The sound of the air as it passes through the heating heat exchanger is reduced because the air flow is not disturbed.

According to a fifth aspect of the present invention, there is provided an air conditioner unit for an automotive air conditioner, comprising: a cooling heat exchanger; a heating heat exchanger located behind the cooling heat exchanger in the vehicle longitudinal direction; A main air mixing door for adjusting the ratio of air passing through the heat exchanger and air not passing therethrough, a cool air bypass passage through which air bypassing the heating heat exchanger flows, and passing through the heating heat exchanger. In an air conditioner unit of an automotive air conditioner including a hot air passage through which air flows, a submix door for adjusting an amount of air passing through the hot air passage, and a unit case accommodating them.
A drainage channel for discharging condensed water is provided on a bottom portion of the unit case, and an exhaust port for discharging air of the hot air passage into the drainage channel is provided on a bottom portion of the unit case. I do.

As described above, the drainage channel for discharging condensed water is provided at the bottom of the unit case, and the exhaust port for discharging the air in the hot air passage into the drainage channel is provided at the bottom of the unit case. During full cooling, the air that has passed through the heating heat exchanger is discharged from the exhaust port to the outside of the unit case through the drainage passage. Therefore, the amount of air flowing back upstream of the heating heat exchanger after being heated by the heating heat exchanger is reduced, and the amount of warm air mixed into the cool air in the cool air bypass passage is further reduced.

[0033]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an air conditioner unit of a vehicle air conditioner according to a first embodiment of the present invention, and FIG. 2 is a plan view of a ventilation resistor.

This air conditioner unit passes through an evaporator (cooling heat exchanger) 1, a heater core (heating heat exchanger) 2 located behind the evaporator 1 in the vehicle front-rear direction H, and the heater core 2. Main air mix door 3 that regulates the ratio of air to non-passing air
A cold air bypass passage 6 in which air bypassing the heater core 2 flows; a hot air passage 7 in which air passing through the heater core 2 flows; and a submix door 8 for adjusting the amount of air passing through the hot air passage 7; And a unit case 9 for accommodating the same.

A blower unit (not shown) is connected to the unit case 9.

The main air mix door 3 has a heater core 2
Of the vehicle in the vertical direction V of the vehicle. The main air mix door 3 has a shaft 4 and a flat door body 5.
The shaft 4 is attached to an intermediate portion 5b of the door body 5.
The main air mix door 3 is a door in which the door body 5 can rotate around the shaft 4, that is, a butterfly type door.

The submix door 8 is arranged downstream of the hot air passage 7.

In the vicinity of the front end face 10 of the heater core 2, a ventilation resistor 11 is disposed to be opposed. The ventilation resistor 11 is supported by the unit case 9. As shown in FIG. 2, the ventilation resistor 11 includes a ventilation section 30 and the ventilation section 30.
Is a plate-shaped member provided with a frame 31 for supporting. Vent section 3
The frame 0 and the frame 31 are integrally formed of a synthetic resin. The ventilation part 30 is formed with countless meshes of uniform size. That is, the ventilation part 30 is a mesh-like plate.

A partition plate 12 is formed on the bottom surface 9a of the unit case 9 so as to cover about 1/2 of the front end face 10 of the heater core 2, and the remaining about 1/2 portion always faces the evaporator 1 side. It is open. The partition plate 12 is located between the evaporator 1 and the heater core 2,
1 is located between the partition plate 12 and the heater core 2. Further, a drain port 13 for discharging condensed water flowing down from the evaporator 1 and an exhaust port 15 for discharging a part of the air in the warm air passage 7 are formed in the bottom surface portion 9 a of the unit case 9. Further, a drain passage 14 for guiding condensed water discharged from the drain port 13 and hot air discharged from the exhaust port 15 to the front side of the unit case 9 in the vehicle front-rear direction H is provided on the bottom surface 9 a of the unit case 9. Have been. The exhaust port 15 and the drain port 13 communicate with the drain channel 14. Unit case 9
The outlet 17 of the drainage channel 14 is formed in the front portion 9b of the drainage passage.

An air mix space 18 is formed in the unit case 9 where air downstream of the cool air bypass passage 6 and air downstream of the hot air passage 7 are mixed. The air mix space 18 is located downstream of the main air mix door 3.

The unit case 9 has a differential blowing opening 19, a vent blowing opening 20, and a foot blowing opening 21 formed downstream of the air mix space 18. An air inlet 25 is formed on a side surface (not shown) of the unit case 9. The mode switching door 2 is located upstream of each of the blowout openings 19, 20, 21 in the unit case 9.
2, 23 and 24 are provided rotatably.

Next, the operation of the air conditioner unit will be described.

When the blower unit operates, air flows into the unit case 9 through the air inlet 25. The air flowing into the unit case 9 goes to the evaporator 1.

When the blowing mode is set to the bi-level mode and the opening of the main air mixing door 3 is 50% and the opening of the sub mix door 8 is 100%, the evaporator 1
A part of the air that has passed through passes through the cool air bypass passage 6 to the air mixing space 18, and the rest goes to the heater core 2. As the air passes through the evaporator 1, it is cooled. The condensed water on the surface of the evaporator 1 flows down to the bottom surface 9a of the unit case 9, and flows from the drain 13 to the drain 1
4 and is discharged to the outside of the unit case 9.

The air flowing to the heater core 2 is supplied to the ventilation resistor 1
1 passes through the warm air passage 7 to the air mixing space 18 after passing through the ventilation resistor 11. As the air passes through the heater core 2, it is heated.

The air downstream of the cool air bypass passage 6 and the air downstream of the hot air passage 7 merge in the air mix space 18,
The mixture is blown out of the unit case 9 through the vent outlet opening 20 and the foot outlet opening 21.

The blowing mode is set to the face mode,
When the main air mix door 3 is fully opened and the sub mix door 8 blocks the downstream of the heater core 2 (that is, when it is set to full cool), since the main air mix door 3 is a butterfly type door, it is upstream of the heater core 2. Although the side is always open, since the ventilation resistor is disposed opposite to the front end face 10 of the heater core 2 in the vehicle front-rear direction H, the air that has passed through the evaporator 1 is
1 prevents the air from flowing into the heater core 2 and prevents the air from returning to the evaporator 1 again. Therefore, the air flowing into the heater core 2 hardly mixes with the air in the cool air bypass passage 6. As a result,
The temperature of the air blown out of the unit case 9 does not increase.

A drain passage 14 for discharging condensed water is provided on the bottom surface 9a of the unit case 9, and an exhaust port 15 for discharging air from the hot air passage 7 into the drain passage 14 is provided on the bottom surface 9a of the unit case 9. , The heater core 2
Is discharged from the exhaust port 15 to the outside of the unit case 9. Therefore, after being heated by the heater core 2, the air returning to the upstream side of the heater core 2 and entering the cool air in the cool air bypass passage 6 is further reduced.

According to this embodiment, the unit case 9
Since the temperature of the air blown from the air does not increase, the comfort during full cooling is not impaired.

Further, at the time of full cooling, the air that has passed through the heater core 2 is exhausted from the exhaust port 15 to the outside of the unit case 9, so that the amount of air that enters the cool air in the cool air bypass passage 6 is further reduced. For this reason, the temperature rise of the air blown out of the unit case 9 can be suppressed.

FIG. 3 is a plan view of a ventilation resistor of an air conditioner unit according to a modification.

In the embodiment shown in FIG. 1, the case where the ventilation resistor 11 having an infinite number of meshes is used as the ventilation resistor has been described. Alternatively, the plate 139 in which the numerous uniform pores 137 are formed is ventilated. It may be used as the resistor 111.

The structure other than the ventilation resistor 111 is the same as that of the first embodiment.
The description is omitted because it is common to the embodiment.

Since the ventilation resistor 111 is disposed opposite to the front end face of the heater core 2 in the vehicle front-rear direction H, the air passing through the evaporator 1 is prevented from flowing into the heater core 2 by the ventilation resistor 111 during the full cooling. And return to the evaporator 1 again.
Blocked by 11.

According to this modification, the same effect as in the first embodiment can be obtained.

FIG. 4 is a plan view of a ventilation resistor of an air conditioner unit of a vehicle air conditioner according to a second embodiment of the present invention.

In this embodiment, the nets 233 and 23 having two types of meshes of different sizes are used as the ventilation resistor 211.
4 to form the ventilation part 230.

The structure other than the ventilation resistor 211 is the same as that of the first embodiment.
The description is omitted because it is common to the embodiment.

A small mesh net 233 is used in a portion of the ventilation part 230 which receives high wind pressure, and a large mesh net 234 is used in a portion which receives low wind pressure.

A partition 231 integral with the frame 31 is formed between the nets 233 and 234, and the net 233 and the net 234 are separated from each other by the partition 231.

As described above, since two types of nets 233 and 234 are used as the ventilation resistor 211 in accordance with the wind pressure,
The pressure distribution on the upstream end face 10 of the heater core 2 becomes substantially uniform, and the air passing through the heater core 2 is rectified.

When the air conditioner unit is set to full hot (when all the air from the evaporator 1 passes through the heater core 2), all the air that has passed through the evaporator 1 flows into the heater core 2, but the ventilation resistor 2
The pressure distribution at 11 is substantially uniform, and the distribution of the velocity of air flowing through the ventilation resistor 211 into the heater core 2 is also substantially constant. Since there is almost no variation in the speed distribution of the ventilation resistor 211, the ventilation resistance is reduced in proportion to the square of the difference in the speed variation, and the ventilation resistance at the time of full hot is minimized.

According to this embodiment, since the air passing through the heater core 2 is rectified, the flow of the air is not disturbed, and the sound when the air passes through the heater unit 2 is reduced.

FIG. 5 is a plan view of a ventilation resistor of an air conditioner unit according to a modification.

In this modification, a plate 239 in which an infinite number of pores 337 and 338 of two different sizes are formed is used as a ventilation resistor 311.

The structure other than the ventilation resistor 311 is the same as that of the first embodiment.
The description is omitted because it is common to the embodiment.

A small hole 337 is used in a portion of the plate 239 which receives a high wind pressure, and a large hole 338 is used in a portion which receives a low wind pressure.

According to this modification, the same effect as in the second embodiment can be obtained.

FIG. 6 is a plan view of a ventilation resistor of an air conditioner unit according to another modification.

In this modified example, the nets 433, 43 having three types of meshes of different sizes are used as the ventilation resistor 411.
4,435 were combined to form the ventilation section 430.

The structure other than the ventilation resistor 411 is the same as that of the first embodiment.
The description is omitted because it is common to the embodiment.

A small mesh net 433 is provided at a portion of the ventilation section 430 which receives high wind pressure, a large mesh net 435 is provided at a portion which receives low wind pressure, and the wind pressure received by the
A mesh 434 of an intermediate mesh is used in a portion that receives a wind pressure that is about the middle of the wind pressure that the wind 5 receives.

A partition 416 integral with the frame 31 is formed between the nets 433, 434, and 435.
5 are separated from each other by the partition 416.

According to this modification, the same effect as in the second embodiment can be obtained.

In the second embodiment, two or three types of nets or pores are used as the ventilation resistors, but more types of nets or pores may be used.

Further, in these embodiments, the case where a synthetic resin is used as the material of the ventilation resistor has been described.
(Fiber rainforced plastic
s).

Further, in these embodiments, the ventilation resistors 11, 111, 211, 311, 41 are provided in the unit case 9.
1 has been described, the ventilation resistors 11, 111, 211, 311, 41 are attached to the unit case 9.
1 may be formed integrally.

The ventilation resistor 1 is provided in the unit case 9.
As a method of attaching 1, 111, 211, 311 and 411, a groove (not shown) is provided in the unit case 9,
The ventilation resistors 11, 111, 211, 311 and 4 are provided in the grooves.
11 may be fitted, or the ventilation resistors 11, 111, 211, 311 and 411 may be bonded to the unit case.

In these embodiments, the case where a mesh-like plate or a plate having an infinite number of pores is used as the ventilation resistor has been described. Can also be used as a ventilation resistor.

[0081]

According to the air conditioner unit for a vehicle air conditioner according to the first, second or third aspect of the present invention, the size of the air conditioner can be reduced and the temperature of the blown air during full cooling can be prevented.

According to the air conditioner unit of the air conditioner for a vehicle according to the fourth aspect of the present invention, since the pressure distribution on the front end face of the heating heat exchanger in the front-rear direction of the vehicle is substantially uniform, the air passing through the heating heat exchanger is provided. Is rectified, and the noise when air passes through the heating heat exchanger is reduced.

According to the air conditioner unit of the vehicle air conditioner of the present invention, the amount of air that is mixed with the cool air in the cool air bypass passage after being heated by the heat exchanger during full cooling is further reduced. The temperature rise of the air blown out of the case can be further suppressed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an air conditioner unit of an automotive air conditioner according to a first embodiment of the present invention.

FIG. 2 is a plan view of a ventilation resistor of the air conditioner unit.

FIG. 3 is a plan view of a ventilation resistor of an air conditioner unit according to a modification.

FIG. 4 is a plan view of a ventilation resistor of an air conditioner unit of an automotive air conditioner according to a second embodiment of the present invention.

FIG. 5 is a plan view of a ventilation resistor of an air conditioner unit according to a modification.

FIG. 6 is a plan view of a ventilation resistor of an air conditioner unit according to another modification.

FIG. 7 is a longitudinal sectional view of an air conditioner unit of a conventional automotive air conditioner.

FIG. 8 is a longitudinal sectional view of an air conditioner unit of another conventional vehicle air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Evaporator (cooling heat exchanger) 2 Heater core (heating heat exchanger) 3 Main air mixing door 6 Cold air bypass passage 7 Hot air passage 8 Submix door 9 Unit case 9a Bottom part 10 End face 11 Ventilation resistor 14 Drainage channel 15 Exhaust port 39, 139, 239 Plate 137, 337, 338 Pores H Vehicle longitudinal direction

Claims (5)

[Claims] 1. A heat exchanger for cooling, a heat exchanger for heating located on a rear side in a vehicle longitudinal direction of the heat exchanger for cooling, and air passing through the heat exchanger for heating and air not passing therethrough. A main air mixing door for adjusting the ratio, a cold air bypass passage in which air bypassing the heating heat exchanger flows, a hot air passage in which air passing through the heating heat exchanger flows, and a passage through the hot air passage An air conditioner unit for an automotive air conditioner, comprising: a submix door for adjusting an amount of air to be mixed; and a unit case for accommodating the submix door, wherein the main air mix door is a butterfly door, and the heating heat exchanger is a vehicle. An air conditioner unit for an air conditioner for a vehicle, wherein a ventilation resistor is disposed facing the front end face in the front-rear direction. 2. An air conditioner unit for an air conditioner for a vehicle according to claim 1, wherein said ventilation resistor is a mesh-like plate. 3. An air conditioner unit for an automotive air conditioner according to claim 2, wherein said ventilation resistor is a plate provided with innumerable pores. 4. The size of the mesh or pores is reduced in a portion of the entire ventilation resistor which receives a high wind pressure,
The air conditioner unit of an air conditioner for a vehicle according to claim 2 or 3, wherein the size of the mesh or the pores is increased in a portion receiving a low wind pressure. 5. A cooling heat exchanger, a heating heat exchanger located on the rear side of the cooling heat exchanger in the front-rear direction of the vehicle, and air passing through the heating heat exchanger and air not passing therethrough. A main air mixing door for adjusting the ratio, a cold air bypass passage in which air bypassing the heating heat exchanger flows, a hot air passage in which air passing through the heating heat exchanger flows, and a passage through the hot air passage An air conditioner unit for an air conditioner for a vehicle, comprising: a submix door for adjusting an amount of air to be discharged; and a unit case for accommodating the submix door, wherein a drainage channel for discharging condensed water is provided on a bottom portion of the unit case. An air conditioner unit for an automotive air conditioner, wherein an exhaust port for discharging air in an air passage into the drainage passage is provided on a bottom surface of the unit case.