JPH11321279A - Air-conditioning unit for automobile air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning unit for an automobile air conditioner, ensuring the sufficient air quantity and reducing vertical dimension with simple constitution. SOLUTION: An air-conditioning unit for an automobile air conditioner is provided with an evaporator 3 for cooling air fed from a blower fan through a relay unit, a heater core 5 disposed above the evaporator 3 so as to heat the air having passed the evaporator 3, and an air-conditioning unit case 18 for accommodating the evaporator 3 and the heater core 5. An air introducing port 19 of almost the same shape as the relay unit is provided on the vehicle front side, and the evaportor 3 is disposed on the vehicle rear side of the air introducing port 19.

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.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of an air conditioner unit of a conventional automobile air conditioner.

An air conditioner unit of an air conditioner for a vehicle includes an evaporator 103, a heater core 105, and an air conditioner unit case 118.

[0004] A rectangular air inlet 119 which is long in the front-rear direction of the vehicle is formed at a lower portion of the air conditioner unit case 118, and air sent from a blower fan (not shown) passes through the air inlet 119 into the air conditioner unit case 118. Will be introduced.

[0005] Above the air inlet 119 in the air conditioner unit case 118, an evaporator 103 is horizontally disposed, and cools the air introduced into the air conditioner unit case 118 via the evaporator 103.

A heater core 105 is disposed horizontally above the evaporator 103 in the air conditioner unit case 118, and the heater core 105 heats the air passing through the evaporator 103.

An air mix door 104 is provided between the evaporator 103 and the heater core 105, and the amount of air passing through the heater core 105 is adjusted by the air mix door 104.

Downstream of the heater core 105, a defroster outlet 108, a vent outlet 109, and a foot outlet duct connection port 121 are provided.

Each of the outlets 108 and 109 is provided with an opening / closing door 11.
Opened and closed by 3,114.

[0010] The air sent from the blower fan (not shown) into the air conditioner unit case 118 via an air inlet passage (not shown) connected to the air inlet 103 flows upward and passes through the evaporator 103. .

When the air mix door 104 is at the position shown by the solid line, the air that has passed through the evaporator 103 does not pass through the heater core 105 and directly passes through each of the outlets 108 and 10.
Flow to 9. As a result, the air cooled by the evaporator 105 is blown out from each of the outlets 108 and 109.

On the other hand, the air mix door 104
At the position indicated by the dashed line, the air that has passed through the evaporator 103 passes through the heater core 105 and then flows to the outlets 108 and 109. As a result, each outlet 108,
From 109, the air heated by the heater core 105 is blown out.

When the opening / closing doors 113 and 114 are at the solid line positions, the outlets 108 and 109 are closed, so that the air heated by the heater core 105 is blown out from the foot outlet duct connection port 121.

FIG. 5 is a sectional view of an air conditioner unit of another conventional air conditioner for automobiles.

The air conditioner unit of the vehicle air conditioner includes an evaporator 203, a heater core 205, and an air conditioner unit case 218.

A substantially trapezoidal air inlet 219 is formed at a lower portion of the air conditioner unit case 218, and air sent from a blower fan is introduced into the air conditioner unit case 218 through the air inlet 219.

Below the air inlet 219 in the air conditioner unit case 218, an evaporator 203 is disposed obliquely.

The air inlet 219 and the evaporator 203
The heater core 205 is disposed horizontally above the.

An air mix door 204 is provided between the evaporator 203 and the heater core 205.

The air sent into the air conditioner unit case 218 flows downward and passes through the evaporator 203. The air passing through the evaporator 203 reverses direction and flows upward. The flow of air at this time is indicated by an arrow a.

When the air mix door 204 is at the position shown by the solid line, the air that has passed through the evaporator 203 does not pass through the heater core 205 and directly passes through each of the outlets 208 and 20.
Flow to 9. As a result, the air cooled by the evaporator 203 is blown from each of the outlets 208 and 209.

On the other hand, when the aermic door 204 is at the position shown by the two-dot chain line, the air that has passed through the evaporator 203 passes through the heater core 205 and then passes through each of the outlets 2.
08, 209. As a result, each outlet 208, 2
From 09, the air heated by the heater core 205 is blown out.

When the doors 213 and 214 are at the solid line positions, the outlets 208 and 209 are closed, so that the air heated by the heater core 205 is blown out from the foot outlet duct connection port 221.

[0024]

However, in the air conditioner unit of the air conditioner for a vehicle shown in FIG. 4, the long side of the rectangular air inlet 119 is longer in the longitudinal direction of the vehicle, and the shorter side is longer than the longer side. Since it becomes extremely short (see FIG. 4), the passage cross-sectional area of the air introduction passage connecting the outlet of the blower fan and the air introduction port 119 sharply increases toward the air introduction port 119, and the air resistance increases to increase the air flow. The air volume from the outlets 108 and 109 and the foot outlet duct connection port 121 is reduced.

In the air conditioner unit of the air conditioner for a vehicle shown in FIG. 5, since air is blown downward, after passing through the evaporator 203, the flow of air is reversed as shown by the arrow a. As a result, the air resistance also increases, and the air volume from each of the outlets 208 and 209 and the foot outlet duct connection port 221 decreases.

In each of the air conditioner units of the air conditioners for automobiles, the air inlets 119 and 2 are provided.
Since the air conditioner 19 and the evaporators 103 and 203 are arranged along the vehicle vertical direction, the size of the air conditioner unit in the vehicle vertical direction increases.

On the other hand, a method is known in which a slide door is used as a mix door to reduce the size in the vertical direction, but the mechanism becomes complicated.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an air conditioner unit for an air conditioner for an automobile which can secure a sufficient air volume and can reduce the size in the vertical direction of the vehicle with a simple configuration. To provide.

[0029]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is a cooling heat exchanger for cooling air sent from a blower through an air introduction path, and a cooling heat exchanger for cooling the air. A heating heat exchanger that is disposed substantially horizontally above the heat exchanger for heating air that has passed through the cooling heat exchanger, and the cooling heat exchanger and the heating heat exchanger. In an air conditioner unit for an air conditioner for a vehicle, comprising an air conditioner unit case accommodated in parallel,
An air inlet having substantially the same shape as the air inlet is provided on the front side of the vehicle, and the cooling heat exchanger is arranged on the vehicle rear side of the air inlet.

The cross section of the air introduction passage has substantially the same shape as that of the air introduction port, and the cooling heat exchanger is arranged substantially horizontally behind the air introduction port on the vehicle side to reverse the direction of the air introduced from the air introduction port. No, the air resistance is reduced.

According to a second aspect of the present invention, in the air conditioner unit for an air conditioner for an automobile according to the first aspect, the partition plate for shutting off the cooling heat exchanger and the heating heat exchanger is provided. It is characterized by comprising an opening provided in the plate, for guiding the air flowing from the air inlet directly to the heating heat exchanger, and a door for opening and closing the opening.

A partition plate for shutting off the heat exchanger for cooling and the heat exchanger for heating, an opening provided on the partition plate for directing the air flowing from the inlet into the heat exchanger for heating, and opening and closing the opening The air resistance is reduced by the amount not passing through the cooling heat exchanger, and the air volume is increased.

[0033]

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

FIG. 2 is a conceptual diagram showing the configuration of an air conditioner for a vehicle having an air conditioner unit according to one embodiment of the present invention. Since FIG. 2 is a conceptual diagram, it differs from the actual arrangement.

Unit case 1 of air conditioner for automobile
, From the upstream side to the downstream side, blower fan (blower) 2,
An evaporator (cooling heat exchanger) 3, an air mixing door 4, and a heater core (heating heat exchanger) 5 are arranged.

The blower fan 2 is a fan for introducing air from the inside air inlet 6 or the outside air inlet 7.

The evaporator 3 is a heat exchanger that cools the air sent from the blower fan 2.

The air mix door 4 is a door for adjusting the amount of air passing through the heater core 5. In this embodiment, a one-sided door is used.

The heater core 5 heats the air that has passed through the evaporator 3.

An upstream side of the unit case 1 is provided with an inside air inlet 6 and an outside air inlet 7, and a downstream side of the unit case 1 is provided with a differential outlet 8, a vent outlet 9, and a foot connection duct connection port 21. Is provided.

The inside air inlet 6 and the outside air inlet 7 are opened / closed by an inside / outside air opening / closing door 11, and each of the outlets 8, 9 and the foot outlet duct connection port 21 are provided with two opening / closing doors 13, 14.
Is opened and closed by

The unit case 1 includes a fan unit case 16 that houses the blower fan 2 and an air conditioner unit case 18 that houses the evaporator 3 and the heater core 5.
And a relay unit (air introduction path) 17 that connects the fan unit case 16 and the air conditioner unit case 18.

FIG. 1 is a sectional view of an air conditioner unit of an air conditioner for a vehicle.

The engine room is located in front of the vehicle (right side in FIG. 1), and the vehicle room is located behind the vehicle (left side in FIG. 1).

The air inlet 19 has substantially the same shape as the cross section of the relay unit 17. The air inlet 19 is provided at a lower portion on the front side of the vehicle.

The evaporator 3 is arranged substantially horizontally behind the air inlet 19 on the vehicle rear side.

The heater core 5 is located above the evaporator 3 and is arranged substantially horizontally.

A foot outlet duct (not shown) directed downward is connected to the foot outlet duct connection port 21 of the air conditioner unit case 18.

The foot outlet formed at one end of the foot outlet duct is always opened, and when the differential outlet 8 and the vent outlet 9 are closed by the opening and closing doors 13 and 14,
Air is blown out from the foot outlet.

When the blower fan 2 operates, air is introduced from the inside air inlet 6 or the outside air inlet 7 of the fan unit 16.

The introduced air flows into the air conditioner unit case 18 from the air inlet 19 through the relay unit 17 and proceeds from the front of the vehicle (right side in FIG. 1) to the rear of the vehicle. , Air conditioner unit case 1
Go up inside 8.

The air is supplied to the evaporator 3 as indicated by the arrow b.
Is cooled when passing through.

The air passing through the evaporator 3 travels further upward.

When the air mix door 4 is at the position shown by the solid line in FIG. 1, the air that has passed through the evaporator 3 proceeds to the respective outlets 8 and 9.

When the doors 13 and 14 are at the positions indicated by the two-dot chain lines in FIG. 1, the air that has passed through the evaporator 3 is guided by the partition plate 20 and proceeds to the heater core 5.

The air that has passed through the heater core 5 is
Guided to 2 and proceed to each outlet 8,9.

When passing through the heater core 5, the air cooled by the evaporator 3 is heated.

As shown in the figure, when the differential air outlet 8 and the vent air outlet 9 are closed, the air heated by the heater core 5 flows from the foot air outlet duct connection port 21 to the foot air outlet through a foot air outlet duct (not shown). Sent and blown out into the cabin.

According to this embodiment, the relay unit 17
Can be made substantially the same shape as the air inlet 19, and the evaporator 3 is arranged substantially horizontally behind the air inlet 19 in the vehicle so that the direction of the air introduced from the air inlet 19 is not reversed. Therefore, the air resistance can be reduced and the air volume can be increased.

Further, the vertical dimension of the air conditioner unit can be reduced without using a slide door having a complicated mechanism as the conventional example as the mix door 4 and using a one-way door having a simple mechanism. Moreover, maintenance is improved, for example, the attachment and detachment of the evaporator 3 is facilitated.

FIG. 3 is a cross-sectional view of an air conditioner unit of an air conditioner for a vehicle according to a modification of the embodiment of the present invention. .

In this modified example, a guide plate 20 (partition plate) for shutting off the evaporator 3 and the heater core 5 is provided with an opening 2 for guiding the air flowing from the air inlet 19 directly to the heater core 5.
This embodiment is different from the above-described embodiment in that 0A is formed and a submix door (door) 30 is provided in the opening 20A.

According to this modification, the same effects as in the above embodiment can be exhibited, and air can be introduced into the heater core 5 only by opening the submix door 30 (at the position shown by the two-dot chain line). 19 to heater core 5
Can be reduced, and the amount of air passing through the heater core 5 can be increased.

[0064]

As described above, according to the air conditioner unit of the air conditioner for a vehicle according to the first aspect of the present invention, the cross section of the air introduction path has substantially the same shape as the air introduction port, and the heat exchange for cooling is performed. Since the container is disposed substantially horizontally behind the air inlet and the direction of the air introduced from the air inlet is not reversed, the air resistance can be reduced and the air volume can be increased.

According to the air conditioner unit for an air conditioner for a vehicle according to the second aspect of the present invention, the air resistance is reduced by the amount not passing through the cooling heat exchanger, so that the air volume passing through the heating heat exchanger increases. .

[Brief description of the drawings]

FIG. 1 is a sectional view of an air conditioner unit of an air conditioner for a vehicle.

FIG. 2 is a conceptual diagram showing a configuration of a vehicle air conditioner including an air conditioner unit according to an embodiment of the present invention.

FIG. 3 is a sectional view of an air conditioner unit of an air conditioner for a vehicle according to a modification of the embodiment of the present invention.

FIG. 4 is a cross-sectional view of an air conditioner unit of a conventional automotive air conditioner.

FIG. 5 is a sectional view of an air conditioner unit of another conventional air conditioner for a vehicle.

[Explanation of symbols]

 2 blower fan (blower) 3 evaporator (cooling heat exchanger) 5 heater core (heating heat exchanger) 17 relay unit (air introduction path) 18 air conditioner unit 19 air introduction port 30 submix door (door)

Claims (2)

[Claims] 1. A cooling heat exchanger for cooling air sent from an air blower through an air introduction passage, and a cooling heat exchanger disposed substantially horizontally above the cooling heat exchanger. A heat exchanger for heating the air that has passed through,
An air conditioner unit for an air conditioner for an automobile, comprising: an air conditioner unit case that accommodates the cooling heat exchanger and the heating heat exchanger in a substantially parallel manner. An air conditioner unit for an air conditioner for an automobile, wherein the heat exchanger for cooling is provided on a front side of the vehicle and the heat exchanger for cooling is arranged on a rear side of the vehicle with respect to the air inlet. 2. A partition plate that shuts off the cooling heat exchanger and the heating heat exchanger, and air that is provided on the partition plate and that flows in from the air introduction port directly to the heating heat exchanger. The air conditioner unit for an air conditioner for a vehicle according to claim 1, further comprising an opening that guides, and a door that opens and closes the opening.