JP2000038014A - Blower unit of air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify and miniaturize a structure, to reduce the manufacturing cost and to save the space by providing an outwardly opened opening/closing door opening or closing a cabin side inner air inlet on a unit case, and providing a sound absorbing material on the inside face. SOLUTION: A unit case 1 is provided with an opening/closing door 7 opening or closing an inner air inlet 5 and an air inlet mode selector door 8 selectively opening or closing the inner air inlet 5 and an outer air inlet 4. The opening/ closing door 7 is a so-called outwardly opened door opened toward the outside of the unit case 1, and a sound absorbing material 9 is provided on the inside face. Sound absorbing materials 10, 11 are provided on both faces of the air inlet mode selector door 8. When a fan 2 is rotated by the action of a motor 3, inner air is introduced into the unit case 1 from the inner air inlets 5, 6. The noise of the fan 2 hits the sound absorbing material 9 on the inside face of the opening/closing door 7, the sound absorbing function of the sound absorbing material 9 operates, and the noise leaked to the car room side from the inner air inlet 5 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower unit for an automotive air conditioner.

[0002]

2. Description of the Related Art As a conventional blower unit for an air conditioner for a vehicle, there is one disclosed in Japanese Utility Model Laid-Open No. 2-23204.

FIG. 4 is a sectional view showing a blower unit of the automotive air conditioner.

[0004] The blower unit of the automotive air conditioner includes a unit case 101 for accommodating a fan 102,
Motor 103 for driving fan 102 and inside air inlets 105 and 106 for introducing inside air into unit case 101.
And an outside air inlet 104 for introducing outside air into the unit case 101, and two inside and outside ports for opening or closing the inside air inlets 105 and 106 and the outside air inlet 104 to introduce inside air or outside air into the unit case 101. Air switching doors 107, 10
8 is provided.

[0005] Two inside air inlets 105 and 106 and one outside air inlet 104 are formed in the unit case 101, and the two inside air inlets 105 and 106 are opposed to each other in the left-right direction in FIG.

The unit case 101 has an inside air inlet 1
Arc-shaped plates 150 and 15 facing the magnetic heads 05 and 106
1 are provided via support arms 170 and 171. Sound absorbing members 160 and 161 are attached to the surfaces of the plates 150 and 151 facing the inside air introduction port.

When the two inside / outside air switching doors 107 and 108 are at the positions indicated by the two-dot chain lines in FIG.
5 and 106 are closed, and the outside air inlet 104 is opened. When the fan 102 rotates in this state, the outside air inlet 104
From outside is introduced into the unit case 101 (outside air introduction mode).

When the two inside / outside air switching doors 107 and 108 are at the positions shown by solid lines in FIG. 4 (when the two inside / outside air switching doors 107 and 108 are in contact with the stopper 180), the outside air introduction port 104 is closed and the inside air introduction is performed. Mouth 105,1
06 is released. When the fan 102 rotates in this state, inside air is introduced into the unit case 101 from both the inside air introduction ports 105 and 106 (inside air introduction mode).

At this time, noise from the fan 102 leaks from the inside air inlets 105 and 106 to the outside, but the leaked noise is generated by the sound absorbing members 160 and 161 of the arc-shaped plates 150 and 151 facing the inside air inlets 105 and 106. Absorbed.

[0010]

As described above, according to the conventional blower unit, in the inside air introduction mode, noise leaking from the inside air introduction ports 105 and 106 to the vehicle compartment can be reduced.

However, in the case of the conventional blower unit, the structure for reducing noise is complicated as described above, and the whole unit is large. That is, two inside air inlets 10
Arc plates 150, 15 in each of 5, 106
1 are opposed to each other via support arms 170, 171;
Moreover, the inside air inlets 105, 106 and the plates 150, 1
A predetermined space is formed between the first space 51 and the second space 51.

As described above, there are many components having a structure for reducing noise, the manufacturing cost is high, and the size of the blower unit is increased, so that a larger accommodation space is required.

The present invention has been made in view of such circumstances, and its object is to simplify and reduce the size of the structure.
An object of the present invention is to provide a blower unit of an air conditioner for a vehicle, which can reduce the manufacturing cost and save space.

[0014]

According to a first aspect of the present invention, there is provided a blower unit for an air conditioner for a vehicle, comprising: a unit case for accommodating a fan; and a unit case formed therein for introducing inside air. A vehicle compartment side inside air inlet and an engine room side inside air inlet, an outside air inlet formed in the unit case for introducing outside air, and provided in the unit case, the engine room side inside air inlet and the outside air introduction. A blower unit for an automotive air conditioner having an inside / outside air switching door that selectively opens and closes an opening; an outside opening / closing door that is provided in the unit case and opens and closes the inside air introduction port on the vehicle interior; A sound-absorbing material provided on an inner surface of the outward opening and closing door.

As described above, the unit case is provided with the open / close door for opening / closing the inside air introduction port on the passenger compartment side, and the sound absorbing material is provided on the inner surface of the open / close door. It is simplified, the number of parts is reduced, and the blower unit is downsized.

According to a second aspect of the present invention, in the blower unit for an automotive air conditioner according to the first aspect of the present invention, the openable door is an arc or L-shape. It is characterized by.

As described above, the outward opening type door is arc-shaped or L-shaped, and the incident angle of the noise of the fan to the sound absorbing material approaches a right angle, so that the sound absorbing efficiency is improved.

[0018]

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

FIG. 1 is a sectional view showing a blower unit of an automotive air conditioner according to one embodiment of the present invention.

The blower unit includes a fan 2 and a fan 2
And a motor 3 for driving the fan 2.

The unit case 1 has an outside air introduction port 4 for introducing outside air, and an inside air introduction port (vehicle room side inside air introduction port) 5 for introducing inside air from a vehicle room side (not shown) (left side in FIG. 1). , And an inside air inlet (engine room side inside air inlet) 6 for introducing inside air from the engine room side (not shown) (right side in FIG. 1).

The unit case 1 is provided with an opening / closing door 7 for opening and closing the inside air inlet 5 and an inside / outside air switching door 8 for selectively opening and closing the inside air inlet 6 and the outside air inlet 4. Is provided. The opening / closing door 7 is a so-called outside opening / closing door that opens toward the outside of the unit case 1.

A sound absorbing material 9 is provided on the inner surface of the door 7. Both sides of the inside / outside air switching door 8 have sound absorbing materials 10, 1
1 is provided.

When an inside / outside air changeover switch (not shown) is switched to the inside air introduction mode, the opening / closing door 7 and the inside / outside air changeover door 8 are respectively moved to the positions indicated by solid lines in FIG. 1 by the action of an actuator (not shown). The mouths 5, 6 open. At this time, the inside / outside air switching door 8 controls the outside air introduction port 4.
Closes.

When the fan 2 is rotated by the operation of the motor 3, inside air is introduced into the unit case 1 from the inside air inlets 5 and 6.

At this time, the noise of the fan 2 hits the sound absorbing material 9 on the inner surface of the opening and closing door 7 as shown by the dashed line arrow in FIG. 1 and the sound absorbing function of the sound absorbing material 9 works. Noise leaking to the room side is reduced.

When the inside / outside air changeover switch is switched to the outside air introduction mode, the inside / outside air switching door 8 moves to the position indicated by the two-dot chain line in FIG. The door 7 rotates and the inside air inlet 5 closes.

Outside air is introduced into the unit case 1 from the outside air inlet 4.

According to the blower unit of the automotive air conditioner of this embodiment, as described above, the inside air inlet 5
The opening / closing door 7 for opening and closing the door is provided in the unit case 1, and the sound absorbing material 9 is provided on the inner surface of the opening / closing door 7, so that the structure for reducing noise is simplified, the number of parts is reduced, and the blower is reduced. The unit is downsized. Therefore, the manufacturing cost can be reduced, and a large accommodation space on the back side of the instrument panel is not required.

FIGS. 2 and 3 are sectional views showing a blower unit of an automotive air conditioner according to a modification of the embodiment of FIG.

The same parts as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the embodiment shown in FIG. 1, the case where the flat opening / closing door 7 is used as the outwardly opening type opening / closing door has been described. Alternatively, the circular opening / closing door 17 shown in FIG.
Alternatively, a substantially L-shaped opening / closing door 27 shown in FIG. 3 may be used.

When the inside air inlets 15, 25 on the passenger compartment side of the unit cases 31, 41 are open, the inside air inlets 15, 25 are opened.
The noise of the fan 2 leaked from the fan 25 is indicated by the dashed line arrow in FIGS.
This corresponds to 9,29. As described above, the opening door 1
7, 27 are arc-shaped or L-shaped, and the angle of incidence of noise on the sound absorbing members 19, 29 is closer to a right angle than in the embodiment of FIG.

According to these modifications, the inside air inlet 1
Noise leaking from 5, 25 to the passenger compartment side can be further reduced.

[0035]

As described above, according to the blower unit for an automotive air conditioner of the first aspect of the present invention, the structure for reducing noise is simplified, the number of parts is reduced, and the blower unit is downsized. Therefore, the manufacturing cost can be reduced, and a large accommodation space is not required on the back side of the instrument panel.

According to the blower unit of the vehicle air conditioner according to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the sound absorption coefficient is improved, so that the interior air inlet from the passenger compartment side to the passenger compartment side. Leakage noise can be further reduced.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing a blower unit of an automotive air conditioner according to a modification of the embodiment of FIG.

FIG. 3 is a sectional view showing a blower unit of an air conditioner for a vehicle according to another modification of the embodiment of FIG. 1;

FIG. 4 is a sectional view showing a blower unit of a conventional automotive air conditioner.

[Explanation of symbols]

 1, 31, 41 Unit case 2 Fan 4 Outside air inlet 5, 6, 15, 25 Inside air inlet 7, 17, 27 Opening / closing door 8 Inside / outside air switching door 9, 10, 11, 19, 29 Sound absorbing material

Claims (2)

[Claims] 1. A unit case for accommodating a fan, a compartment-side inside air inlet and an engine room-side inside air inlet formed in the unit case for introducing inside air, and formed in the unit case for introducing outside air. A blower unit for an automotive air conditioner, comprising: an outside air introduction port; and an inside / outside air switching door provided in the unit case and selectively opening and closing the engine room side inside air introduction port and the outside air introduction port. An automotive vehicle, comprising: an outer opening door that is provided in a unit case and opens and closes the interior air inlet, and a sound absorbing material that is provided on an inner surface of the outer opening door. Blower unit for air conditioner. 2. A blower unit for an automotive air conditioner according to claim 1, wherein said openable door is arc-shaped or L-shaped.