JPH11314512A - Fan unit of air conditioning device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the noise in a car room in an internal and external air mixing time (a half internal air mode), by closing the internal air door at the car body side, and opening the internal air door at the engine room side in a specified amount. SOLUTION: By opening a switching door 13A at the engine room side gradually while closing a switching door 12A at the car room side, the internal air is introduced, and the switching door 12A at the car room side is opened immediately before making in the internal air mode. And after the switching door 12A at the car room side is closed, the switching door 13A at the engine room side is closed gradually to introduce the external air. As a result, in the half internal air mode when the external air and the internal air are mixed, the switching door 12A at the car room side is closed, so as to reduce the invasion of a noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fan unit for an air conditioner for a vehicle.

[0002]

2. Description of the Related Art A fan unit of an air conditioner for a vehicle includes a fan unit case accommodating a blower fan, two inside air inlets for introducing inside air into the fan unit case, and outside air into the fan unit case. It has an outside air inlet and two opening / closing doors for switching between inside and outside air.

[0003] The two inside air introduction ports and the outside air introduction port are formed in a fan unit, and the two inside air introduction ports are arranged in the vehicle longitudinal direction of the fan unit.

When both of the two inside air introduction ports are closed, since the outside air introduction port is open, when the blower fan operates, outside air is introduced into the fan unit case from the outside air introduction port (outside air mode).

When both of the two inside air introduction ports are open, the outside air introduction port is closed. When the blower fan operates, inside air is introduced into the fan unit case from the two inside air introduction ports (inside air mode). ).

[0006]

FIG. 12 is a diagram showing the relationship between the opening degrees of two opening / closing doors and the drive side stroke in a fan unit of a conventional automobile air conditioner, and FIG.
FIG. 4 is a diagram showing a relationship between an opening / closing door and noise.

In FIG. 12, the vertical axis represents the opening degree of the opening / closing door,
The horizontal axis is the mode. The solid line indicates the door on the passenger compartment side, and the dotted line indicates the door on the engine side.

In FIG. 13, the vertical axis represents the noise level, and the horizontal axis represents the opening of the door.

When the two opening / closing doors close the two inside air inlets (points a and b in FIG. 12), the opening / closing door functions as a sound insulating wall in the vehicle compartment, and the noise when air (outside air) is sucked is shut off. You.

However, when the two inside air introduction ports are changed from the outside air mode in which only outside air is introduced to the semi-inside air mode in which inside air and outside air are mixed, or from the inside air mode in which only inside air is introduced (point e in FIG. 12). In the inside air mode, the door on the indoor side opens in synchronization with the door on the engine room side (see points c and d in FIG. 12), so that noise at the time of air intake is reduced by the inside air inlet and the instrument on the vehicle side. There is a problem that the vehicle enters the vehicle interior through an instrument panel (hereinafter referred to as an instrument panel).

The noise does not change linearly with the opening of the door (see FIG. 13) but increases rapidly.

Therefore, when the room temperature is high, for example, in summer, the inside air mode (2
Cooling is continued with the two air inlets open), and when the temperature drops to some extent, the air conditioner is switched to the cooling in the inside / outside air mode. However, since both the opening and closing doors are open, the inside air inlet on the passenger compartment side Loud noise always enters the passenger compartment (see the range R in FIG. 13).

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to provide a fan unit of an air conditioner for an automobile, which can reduce noise in a vehicle compartment particularly when air inside and outside is mixed (semi-inside air mode). It is to be.

[0014]

According to a first aspect of the present invention, there is provided a fan unit case which is disposed between a vehicle room and an engine room and houses a blower fan, Two inside air inlets formed side by side in the vehicle front-rear direction to introduce inside air, an outside air inlet formed in the fan unit case to introduce outside air, and provided inside the fan unit case to switch between inside and outside air. In the fan unit of the automotive air conditioner including two opening and closing doors, when in a semi-inside air mode in which outside air and inside air are mixed, the inside air door on the vehicle compartment side is closed, and the inside air door on the engine room side is closed. An opening / closing door interlocking means that opens a predetermined amount is provided.

When switching from the outside air mode to the inside air mode, the inside air is introduced by gradually opening the opening door on the engine room side with the opening door on the vehicle compartment side closed, and the opening door on the vehicle compartment side is set immediately before entering the inside air mode. To open. When switching from the inside air mode to the outside air mode, the open / close door on the vehicle compartment side is closed, and then the open / close door on the engine room side is gradually closed to introduce outside air. Therefore, in the semi-inside air mode, the opening / closing door on the passenger compartment side is in a closed state.

According to a second aspect of the present invention, there is provided a fan unit case which is disposed between a vehicle compartment and an engine room and accommodates a blower fan, and is formed side by side in the vehicle width direction of the fan unit case to introduce inside air. A vehicle air conditioner comprising: two inside air inlets; an outside air inlet formed in the fan unit case for introducing outside air; and two opening / closing doors provided in the fan unit case for switching between inside and outside air. In the fan unit of the apparatus, when in a semi-inside air mode in which the outside air and the inside air are mixed, an opening / closing door interlocking unit that closes the inside air door on the driver's seat side and opens the predetermined amount of the inside air door on the passenger seat side is provided. Features.

When switching from the outside air mode to the inside air mode, the passenger side opening / closing door is gradually opened while the driver's seat side opening / closing door is closed to introduce inside air, and the driver's seat side opening / closing door is set immediately before the inside air mode is set. To open. When switching from the inside air mode to the outside air mode, after opening and closing the driver's seat side door, the front passenger side opening and closing door is gradually closed to introduce outside air. Therefore, in the semi-inside air mode, the opening / closing door on the driver's seat side is closed.

[0018]

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

FIG. 1 is a schematic diagram showing a mounting position of an air conditioner for a vehicle having a fan unit according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.

The vehicle air conditioner 1 is arranged between an engine room 20 and a vehicle room 30.

The engine room 20 and the vehicle air conditioner 1 are separated by a dash panel 21, and the vehicle air conditioner 1 and the passenger compartment 30 are separated by an instrument panel 31.

The vehicle air conditioner 1 comprises a fan unit 10 and an air conditioner unit 40.

The fan unit 10 is disposed substantially forward of the passenger seat 32 and far from the driver seat 33.

The air conditioner unit 40 includes an evaporator 41
And a heater core 42.

The fan unit 10 includes a fan unit case 11, inside air inlets 121 and 13, outside air inlet 14, and doors 12A and 13A.

A blower fan 15 for introducing air into the air conditioner unit 40 is accommodated in a lower portion of the fan unit case 11.

The blower fan 1 of the fan unit case 11
Above 5, two inside air introduction ports 12 and 13 for introducing inside air are formed, and an outside air introduction port 14 for introducing outside air is formed. The two inside air introduction ports 12 and 13 are arranged along the vehicle front-back direction.

Inside air inlets 12 and 13 and outside air inlet 14
Near the opening and closing door 12 for switching between inside and outside air.
A and 13A are provided.

Next, the operation of the fan unit will be described.

FIGS. 3 to 5 are schematic diagrams of a fan unit for explaining the operation of the opening / closing door by the drive link, FIGS. 6 to 8 are schematic diagrams of the fan unit for explaining mode switching, and FIG. FIG. 4 is a diagram showing a relationship between the degree and a drive-side stroke.

In FIG. 9, the vertical axis indicates the opening degree of the opening / closing door, and the horizontal axis indicates the mode. The solid line indicates the opening / closing door on the passenger compartment side, and the dotted line indicates the opening / closing door on the engine side.

6 is shown in FIG. 3, FIG. 7 is shown in FIG.
6 are diagrams respectively corresponding to FIG.

The opening and closing doors 12A and 13A are connected to each other by a link mechanism (opening and closing door interlocking means) 50.

The link mechanism 50 includes four links 51 to 54
Consists of

The first link 51 is substantially triangular, and
The shaft 12B of the door 12A is attached to one of the apex angles, and the first link 51 rotates integrally with the door 12A.

The first link 51 has an arc-shaped groove 51A.
And a linear groove 51B extending in a direction away from the shaft 12B at one end of the arc-shaped groove 51A.
Are formed.

The second link 52 is substantially L-shaped, and has an intermediate portion rotatably supported by the fan unit case 11 via a shaft 52A.

The grooves 51A, 5A are provided at one end of the second link 52.
A slider 52B slidable along 1B is provided, and one end of a rod 61 is rotatably supported at the other end.

The rod 61 is an actuator (not shown)
As a result, it moves in the left-right direction with a predetermined stroke (range indicated by arrow a), and transmits the driving force to the second link 52 side.
The mode is switched according to the stroke.

One end of the third link 53 has an opening / closing door 13
A shaft 13B of A is attached, and the third link 53 rotates integrally with the opening / closing door 13A.

One end of the fourth link 54 is connected to the second link 5
2 is rotatably supported by the other end, and the other end is rotatably supported by the other end of the third link 53.

When the inside / outside air changeover switch (not shown) is switched to the outside air mode, the other end of the second link 52 is urged rightward via the rod 61 by the action of the actuator, and the second link 52 is turned counterclockwise. Rotate to the second
Of the slider 52B rotates counterclockwise.

When the slider 52B reaches the end of the groove 51A, the door 12A on the passenger compartment side rotates clockwise, and the inside air inlet 12 closes.

When the second link 52 rotates counterclockwise, the fourth link 54 causes the third link 53 to rotate.
Turns counterclockwise, opening and closing door 1 on the engine room side
3A rotates counterclockwise, and the inside air inlet 13 closes.

This is the state at point A in FIG.

When the blower fan 15 is operated, outside air is introduced into the fan unit case 11 from the outside air inlet 14 (see FIG. 6).

The introduced outside air is cooled when passing through the evaporator 41, heated when passing through the heater core 42, and sent to a differential outlet, a vent outlet, and a foot outlet (not shown).

When the inside / outside air changeover switch is switched to the semi-inside air mode, the rod 6 is actuated by the action of the actuator.
The other end of the second link 52 is urged to the left via 1.

At this time, the slider 5 of the second link 52
2B only rotates clockwise along the groove 51A of the first link 51, the first link 51 is not urged in any direction, and the inside air inlet 12 on the passenger compartment side remains closed. is there.

This is the state at point B in FIG.

At the same time, the third link 53 is rotated clockwise by the fourth link 54, the opening / closing door 13A on the engine room side is rotated clockwise, and the inside air inlet 13 starts to open.

This is, for example, the state at point C in FIG.

When the blower fan 15 is operated, the fan unit case 1 is connected to the outside air inlet 14 and the inside air inlet 13.
Outside air and inside air are introduced into 1 (see FIG. 7).

When the inside / outside air changeover switch is switched to the inside air mode, the rod 61 is actuated by the action of the actuator.
The other end of the second link 52 is further urged to the left through the line than in the semi-inside air mode.

At this time, the slider 5 of the second link 52
2B moves from the arc-shaped groove 51A of the first link 51 to the linear groove 51B.

The opening / closing door 12A is still closed.

This is the state at point D in FIG.

When the slider 52B reaches the end of the groove 51B, the first link 51 rotates counterclockwise, the opening / closing door 12A rotates counterclockwise, and the inside air inlet 12 on the passenger compartment side.
Begins to open.

This is the state at point E in FIG.

At this time, the third link 53 is further rotated clockwise by the fourth link 54, and the opening / closing door 13A on the engine room side closes the outside air inlet 14 in synchronization with the opening / closing door 12A on the vehicle compartment side. To the inside air inlet 1
2, 13 are fully opened.

This is the state at point F in FIG.

When the blower fan is operated, inside air is introduced into the fan unit case 11 from the two inside air inlets 12 and 13 (see FIG. 8).

When the mode is changed from the inside air mode to the outside air mode, the actuator may be operated in a manner opposite to the above.

According to this embodiment, while the door 12A on the passenger compartment side is closed, the door 13 on the engine room side is gradually opened to introduce inside air, and the door 12A on the passenger compartment is set to the inside air mode. Can be opened just before.

After closing the door 12A on the passenger compartment side, the door 13A on the engine room side can be gradually closed to introduce outside air.

As a result, in the semi-inside air mode in which the outside air and the inside air are mixed, the opening / closing door 12A on the passenger compartment side is closed, so that the noise at the time of air intake is shut off by the opening / closing door 12A. Noise can be reduced to about 1-2 dB.

For example, when the room temperature is high as in summer, the air conditioner is cooled in the inside air mode and then set to the semi-inside air mode. In such a case, the effect of noise reduction is remarkable as compared with the conventional fan unit. is there.

FIG. 10 is a schematic view showing a mounting position of an air conditioner for a vehicle having a fan unit according to a second embodiment of the present invention. FIG. 11 is a sectional view taken along line XI-XI in FIG. The same parts as those of the embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The fan unit 110 of this embodiment is
Two inside air inlets 112 and 113 for introducing inside air
Are different from the first embodiment in that they are arranged side by side in the vehicle width direction.

According to the second embodiment, the noise at the time of air intake can be cut off by the door 112A on the driver's seat side, and the noise transmitted to the driver is reduced. This opening and closing door 112A corresponds to the opening and closing door 12A of the first embodiment.

[0071]

As described above, according to the fan unit of the vehicle air conditioner according to the first aspect of the present invention,
When switching from the outside air mode to the inside air mode, gradually open the engine room side door with the vehicle room side door closed to introduce inside air, and the vehicle room side door almost has the engine room side door. Open when fully opened. When switching from the inside air mode to the outside air mode, the open / close door on the vehicle compartment side is closed, and then the open / close door on the engine room side is gradually closed to introduce outside air. As a result, in the semi-inside air mode, the opening / closing door on the passenger compartment side is in a closed state, so that noise at the time of air intake is shut off by the door on the passenger compartment side, and noise entering the passenger compartment is reduced. .

According to the fan unit of the vehicle air conditioner of the present invention, when switching from the outside air mode to the inside air mode, the opening and closing door on the passenger seat side is gradually opened while the opening and closing door on the driver seat side is closed. The driver's seat-side door opens when the engine room-side door is almost fully opened. When switching from the inside air mode to the outside air mode, after opening and closing the driver's seat side door, the front passenger side opening and closing door is gradually closed to introduce outside air. As a result, in the semi-inside air mode, the opening / closing door on the driver's seat side is closed, so that the noise at the time of air intake is cut off by the opening / closing door on the driver's seat side, and the noise transmitted to the driver is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a mounting position of an air conditioner for a vehicle having a fan unit according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a schematic view of a fan unit for explaining an operation of an opening / closing door by a drive link.

FIG. 4 is a schematic view of a fan unit for explaining an operation of an opening / closing door by a driving link.

FIG. 5 is a schematic view of a fan unit for explaining an operation of an opening / closing door by a driving link.

FIG. 6 is a schematic diagram of a fan unit for explaining mode switching.

FIG. 7 is a schematic view of a fan unit for explaining mode switching.

FIG. 8 is a schematic view of a fan unit for explaining mode switching.

FIG. 9 is a diagram showing a relationship between an opening degree of an opening / closing door and a drive-side stroke.

FIG. 10 is a schematic view showing a mounting position of an air conditioner for a vehicle having a fan unit according to a second embodiment of the present invention.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10;

FIG. 12 is a diagram showing a relationship between the opening degrees of two opening / closing doors and a drive side stroke in a fan unit of a conventional automotive air conditioner.

FIG. 13 is a diagram showing a relationship between an opening / closing door and noise.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Fan unit case 12, 13 Inside air inlet 12A, 13A Opening / closing door 14 Outside air inlet 15 Blowing fan 20 Engine room 30 Car room 50 Link mechanism (opening / closing door interlocking means)

Claims (2)

[Claims] 1. A fan unit case which is arranged between a vehicle compartment and an engine room and accommodates a blower fan, and two inside air inlets formed side by side in the vehicle front-rear direction of the fan unit case to introduce inside air. A fan unit of an air conditioner for an automobile, comprising: an outside air inlet formed in the fan unit case for introducing outside air; and two opening / closing doors provided in the fan unit case for switching between inside and outside air. An air opening / closing means for closing the inside air door on the vehicle compartment side and opening and closing the inside air door on the engine room side by a predetermined amount in a semi-inside air mode in which outside air and inside air are mixed. A fan unit for a harmony device. 2. A fan unit case which is arranged between a vehicle compartment and an engine room and accommodates a blower fan, and two inside air inlets formed side by side in the vehicle width direction of the fan unit case and for introducing inside air. A fan unit of an air conditioner for an automobile, comprising: an outside air inlet formed in the fan unit case for introducing outside air; and two opening / closing doors provided in the fan unit case for switching between inside and outside air. An air opening / closing means for closing the inside air door on the driver's seat side and opening and closing the inside air door on the passenger side by a predetermined amount in a semi-inside air mode in which outside air and inside air are mixed; A fan unit for a harmony device.