JP2005014811A - Air-conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noises entering a compartment 2 from an outside air introduction port 13 through an inside air introduction port 12 under an intermediate condition between an inside air mode and an outside air mode. <P>SOLUTION: This air-conditioner is provided with an inside air introduction port 12 formed in a blow unit case 11 of a blow unit 10, communicated with the compartment 2, and introducing the inside air, an outside introduction port 13 communicated with the vehicle outside the compartment and introducing the outside air, an inside air port opening/closing door 14 opening/closing the inside introduction port 12 provided in the blowing unit case 11, and an outside opening/closing door 15 opening/closing the outside air introduction port 13. The inside air port opening/closing door 14 and the outside air opening/closing door 15 are designed in a manner that one of them is opened when the other is closed. Even under an intermediate condition between the inside air mode and the outside air mode, because either one of the inside air port opening/closing door 14 or the outside port opening/closing door 15 is always closed, noises entering the compartment from the outside air introduction port 13 through the inside air introduction port 12 can be eliminated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner including an air conditioning unit installed in a vehicle interior of a vehicle and a blower unit disposed in a vehicle interior of the vehicle or outside the vehicle interior, and particularly noise outside the vehicle interior. The present invention relates to a structure of a blower unit that prevents entry into a passenger compartment.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a vehicle air conditioner that includes an air conditioning unit that includes an air conditioner such as an evaporator and a heater core and forms an air passage, and a blower unit that includes a blower inside. FIG. 6 is a schematic cross-sectional view showing a schematic structure of a conventional blower unit 10. The blower unit 10 switches between the blower unit case 11 that houses the blowers 18 and 19, the inside air introduction port 12 that introduces inside air formed in the blower unit case, the outside air introduction port 13 that introduces outside air, and the switching between inside and outside air. An inside / outside air switching door 6 is provided.
[0003]
Since the outside air introduction port 13 is closed when the inside / outside air switching door 6 opens the inside air introduction port 12 (the position indicated by the solid line in FIG. 6), when the blower fan 19 is activated, the inside air is discharged from the inside air introduction port 12. The air is introduced into the blower unit case 11 and blown to an air conditioning unit 20 (not shown) (inside air mode). Further, since the inside air introduction port 12 is closed when the outside air introduction port 13 is open (the position indicated by the broken line in FIG. 6), when the blower fan 19 is activated, outside air is introduced into the blower unit case 11 from the outside air introduction port 13. Then, the air is sent to the air conditioning unit 20 (not shown) (outside air mode).
[0004]
When the inside / outside air switching door 6 closes the outside air introduction port 13 in the inside air mode or when the inside / outside air switching door 6 closes the inside air introduction port 12 in the outside air mode, the inside / outside air switching door 6 is It functions as a sound insulation wall into the vehicle interior and prevents noise outside the vehicle interior from entering the vehicle interior from the outside air inlet 13. Although not shown, the same applies to a structure in which two inside air introduction ports and one outside air introduction port are switched by two inside / outside air switching doors.
[0005]
[Problems to be solved by the invention]
However, in the blower unit 10 having the above-described conventional structure, when the inside air mode and the outside air mode are switched, both the inlets 12 and 13 are opened (the two-dot chain line position in FIG. 6), and the outside air inlet 13 (outside the passenger compartment) and the inside air introduction port 12 (in the passenger compartment) are in a communication (cylinder disconnection) state, and noise outside the passenger compartment enters the passenger compartment and is heard by the occupant, causing discomfort. Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is noise that enters the vehicle interior through the outside air inlet to the inside air inlet in the middle state between the inside air mode and the outside air mode. An object of the present invention is to provide a vehicle air conditioner capable of reducing the above.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the technical means described in claims 1 to 3 are employed. That is, in the first aspect of the present invention, the air conditioning unit (20) that is installed in the vehicle compartment (2) of the vehicle and has an air conditioning device therein and forms an air passage, and the air blowing means (17-19) ) And a blower unit (10) that blows air to the air conditioning unit (20). The vehicle air conditioner is formed in the blower unit case (11) of the blower unit (10), and the passenger compartment (2). An inside air introduction port (12) that communicates with the inside of the vehicle and introduces vehicle interior air, an outside air introduction port (13) that communicates with the interior of the vehicle outside the vehicle compartment (2) and introduces vehicle interior air, and a blower unit case (11 The inside air opening / closing means (14) for opening and closing the inside air introduction opening (12) provided in the inside and the outside air opening / closing means (15) for opening / closing the outside air introduction opening (13) are provided. (14) and outside air opening / closing means (15) Is characterized in that to open the other is closed are one another.
[0007]
According to the first aspect of the present invention, either the inside air opening / closing means (14) or the outside air opening / closing means (15) is always closed even in the inside air mode, the outside air mode, and the intermediate state thereof. Therefore, it is possible to eliminate the noise that passes from the outside air inlet (13) to the inside air inlet (12) and enters the vehicle interior.
[0008]
According to the second aspect of the present invention, the outside air opening / closing means (15) is composed of the first outside air opening / closing means (15A) and the second outside air opening / closing means (15B). The second outside air opening / closing means (15B) is open when the means (14) and the first outside air opening / closing means (15A) are both closed.
[0009]
In the invention according to claim 1 alone, at the time of switching between the inside air mode and the outside air mode, a state in which both the inside air introduction port (12) and the outside air introduction port (13) are temporarily closed occurs. If the blower fan (19) is kept operating, an excessive force is applied to the inside air opening / closing means (14) and the outside air opening / closing means (15). Therefore, when the mode is switched, the blower fan (19) is stopped. Treatment is required.
[0010]
However, according to the second aspect of the present invention, by providing two outside air opening / closing means (15) and leaving one opening degree by shifting the operation timing, the inside air introduction port (12) can also be turned into the outside air introduction port ( 13) does not create a closed state. Thus, the inside air mode and the outside air mode can be smoothly switched without applying excessive force to the inside air opening / closing means (14) and the outside air opening / closing means (15) even when the blower fan (19) is operated. it can.
[0011]
According to the third aspect of the present invention, the inside air opening / closing means (14) and the second outside air opening / closing means (2) are provided between the inside air introduction port (12) and the outside air introduction port (13) in the blower unit (10). 15B), and the second outside air opening / closing means (15B) is arranged on the side farther from the inside air introduction opening (12) than the inside air opening / closing means (14), and the second outside air opening / closing means (15B) is a piece. The second outside air opening / closing means (15B) is formed from a side far from the inside air introduction port (12) by arranging the rotating plate (16) on the inside air introduction port (12) side. It is characterized by opening to the inlet (12) side.
[0012]
According to the second aspect of the present invention, there occurs a state in which the inside air introduction port (12) and the outside air introduction port (13) opened by the second outside air opening / closing means (15B) are opened little by little. However, according to the third aspect of the invention, the second outside air opening / closing means (15B) opens from the far side to the inside air introduction port (12) side at a position far from the inside air introduction port (12). Thus, the openings of the outside air introduction port (13) and the inside air introduction port (12), which are opened little by little, do not linearly communicate (disconnect the cylinder).
[0013]
As a result, the sound from outside the vehicle compartment collides with the opening / closing means (door) and the case wall and gradually enters and enters while being gradually attenuated. Incidentally, the reference numerals in parentheses of each means described above are an example showing the correspondence with the specific means described in the embodiments described later.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a mounting state of a vehicle air conditioner 1 according to an embodiment of the present invention on a vehicle, and FIG. 2 illustrates a schematic structure of a blower unit 10 according to an embodiment of the present invention. It is a horizontal cross-sectional schematic diagram. As shown in FIG. 1, the vehicle air conditioner 1 of the present embodiment is roughly composed of two parts, a blower unit 10 and an air conditioner unit 20, and includes a vehicle compartment 2 and a vehicle exterior (for example, an engine). It is arrange | positioned before and behind the dash panel (partition board) 4 which consists of an iron plate which partitions off the room.
[0015]
The blower unit 10 is attached to the engine room 3 side in the approximate center of the dash panel 4, and is also attached to the back of the instrument panel 5 on the vehicle compartment 2 side in the approximate center of the dash panel 4. First, the air conditioning unit 20 is, as is well known, in a common air conditioning unit case made of a resin material such as polypropylene, an evaporator (cooling heat exchanger) 21 that constitutes a refrigeration cycle, and a heater core that uses engine cooling water as a heat source ( Air-conditioning equipment such as a heating heat exchanger (22) is integrally incorporated, and an air passage for sending conditioned air to a plurality of air outlets in the passenger compartment 2 is formed.
[0016]
Next, the blower unit 10 is roughly divided into an internal / external air switching means and a blower means. First, the air-conditioning unit 20 is made of a blower unit case 11 made of a resin material such as polypropylene. And an outside air introduction port 13 to be taken in. The inside air inlet 12 is connected to an opening 41 formed in the dash panel 4 so that the inside air can be taken into the unit through the opening 41.
[0017]
Inside the blower unit case 11, an inside air opening / closing door (inside air opening / closing means) 14 that opens and closes the circulation of the inside air from the inside air introduction port 12 and a first outside air opening / closing that opens and closes the circulation of the outside air from the outside air introduction port 13. A door (outside air opening / closing means 15, first outside air opening / closing means) 15A and a second outside air opening / closing door (outside air opening / closing means 15, second outside air opening / closing means) 15B are provided. 14 and two first / second outside air opening / closing doors 15A and 15B, a link mechanism (not shown), and a drive mechanism such as an actuator (not shown) such as a servo motor serve as inside / outside air switching means.
[0018]
An inside air opening / closing door 14 and a second outside air opening / closing door 15B are provided between the inside air introduction port 12 and the outside air introduction port 13, and the second outside air opening / closing door 15 B is an inside air introduction port rather than the inside air opening / closing door 14. It is arranged on the side far from 12. The second outside air opening / closing door 15B is a cantilever plate door, and the rotation shaft 16 is arranged on the inside air introduction port 12 side. Thus, the second outside air opening / closing door 15B opens from the side far from the inside air introduction port 12 to the inside air introduction port 12 side.
[0019]
The air flowing in through the inside / outside air switching means is sucked into the scroll casing 17 from the suction port 17a, pressurized by the blower fan 19 driven by the blower motor 18, and formed in the dash panel 4 from the discharge port 17b. The air is blown to the air conditioning unit 20 through the opening 42. The scroll casing 17, blower motor 18, and blower fan 19 serve as a blowing means. In addition, the ventilation unit 10 and the air conditioning unit 20 are being fixed to the dash panel 4 by the fastening component which is not illustrated through the sealing member which is not illustrated in the clearance gap between the periphery of the opening parts 41 * 42.
[0020]
Next, the operation in the above configuration will be described. FIG. 3 is a graph showing an operation pattern of each door when switching between the inside air mode and the outside air mode. Characteristically, the inside air opening / closing door 14 and the first outside air opening / closing door 15A are configured such that one of them closes and the other opens. The first outside air opening / closing door 15A and the second outside air opening / closing door 15B are fully opened at the same time, but the second outside air opening / closing door 15B has an operation pattern that is closed with a delay with respect to the first outside air opening / closing door 15A.
[0021]
First, in the inside air mode position, the inside air opening / closing door 14 (solid line in FIG. 3) is fully opened, and the first outside air opening / closing door 15A (dotted line in FIG. 3) and the second outside air opening / closing door 15B (broken line in FIG. 3) are opened. By closing, the passenger compartment air is introduced from the inside air introduction port 12 into the blowing means 17 to 19 and is blown to the air conditioning unit 20. In the outside air mode position, both the first and second outside air opening / closing doors 15A and 15B are fully opened and the inside air opening / closing door 14 is closed, so that the outside air of the vehicle compartment is introduced from the outside air introduction port 13 to the blowing means 17-19. The air is sent to the air conditioning unit 20.
[0022]
Next, the operation state of each door in the middle of switching between the inside air mode and the outside air mode will be described. FIG. 4 is a schematic diagram showing the operating state of each door at the position A in FIG. In this position, the inside air opening / closing door 14 and the first outside air opening / closing door 15A are both closed in front, but the second outside air opening / closing door 15B is opened only by the opening a, and the introduction port is completely closed. I am trying not to. FIG. 5 is a schematic diagram showing the operating state of each door at the position B in FIG. At this position, the first outside air opening / closing door 15A is closed in front, but both the inside air opening / closing door 14 and the second outside air opening / closing door 15B are opened by an opening b. As a result, both outside air and inside air are introduced (outlined arrow in FIG. 5), and sound outside the vehicle compartment (black arrow in FIG. 5) enters the outside air from the open second outside air opening / closing door 15B. There is a possibility that the open air opening / closing door 14 will flow backward to enter the passenger compartment 2.
[0023]
Next, features in the present embodiment will be described. First, it is formed in the blower unit case 11 of the blower unit 10 and communicates into the vehicle interior 2 and introduces vehicle interior air, and communicates into the vehicle outside the vehicle compartment 2 and introduces vehicle exterior air. The outside air inlet 13, the inside air opening / closing door 14 that opens and closes the inside air inlet 12 provided in the blower unit case 11, and the outside air opening / closing door 15 that opens and closes the outside air inlet 13 are provided, and the inside air opening / closing The door 14 and the outside air opening / closing door 15 are configured such that one of them closes and the other opens.
[0024]
As a result, either the inside air opening / closing door 14 or the outside air opening / closing door 15 is always closed even in the inside air mode, the outside air mode, and the intermediate state thereof, so that the outside air introduction port 13 changes to the inside air introduction port 12. It is possible to eliminate the noise that passes through the vehicle interior.
[0025]
Further, the outside air opening / closing door 15 is constituted by two sheets of the first outside air opening / closing door 15A and the second outside air opening / closing door 15B, and when the inside air opening / closing door 14 and the first outside air opening / closing door 15A are both closed. The second outside air opening / closing door 15B is opened. This is because, with the above structure alone, when the mode is switched between the inside air mode and the outside air mode, both the inside air introduction port 12 and the outside air introduction port 13 are temporarily closed, and the blower fan 19 remains operating. Then, since an excessive force is applied to the inside air opening / closing door 14 and the outside air opening / closing door 15, it is necessary to take measures such as stopping the blower fan 19 when the mode is switched.
[0026]
However, in the structure of the present embodiment, two outside air opening / closing doors 15 are provided, and the opening timing of one opening is left by shifting the operation timing so that neither the inside air introduction port 12 nor the outside air introduction port 13 is closed. I have to. As a result, it is possible to smoothly switch between the inside air mode and the outside air mode without applying excessive force to the inside air opening / closing door 14 and the outside air opening / closing door 15 even when the blower fan 19 is operated.
[0027]
Further, an inside air opening / closing door 14 and a second outside air opening / closing door 15B are provided between the inside air introduction port 12 and the outside air introduction port 13 in the blower unit 10, and the second outside air opening / closing door 15B is connected to the inside air opening / closing door 14. By arranging the second outside air opening / closing door 15B as a cantilever plate door and disposing the rotating shaft 16 on the inside air introduction port 12 side, the second outside air opening / closing door 15B is arranged on the side farther from the inside air introduction port 12 than the second air opening / closing door 15B. The outside air opening / closing door 15B opens from the side far from the inside air introduction port 12 to the inside air introduction port 12 side.
[0028]
This is because the inside air inlet 12 and the outside air inlet 13 opened by the second outside air opening / closing door 15B are slightly opened by the above structure. However, according to the structure of the present embodiment, the second outside air opening / closing door 15B is opened from the far side to the inside air introduction port 12 at a position far from the inside air introduction port 12, so that the outside air introduction port opened little by little. 13 and the open air inlet 12 do not linearly communicate with each other (cylinder disconnection). As a result, the sound from outside the vehicle compartment collides with the opening / closing means (door) and the case wall and gradually enters and enters while being gradually attenuated.
[0029]
(Other embodiments)
In the above-described embodiment, the blower unit 10 is disposed outside the vehicle compartment, but the present invention is not limited to this, and the blower unit 10 is disposed in the vehicle compartment so that only the outside air inlet 13 communicates outside the vehicle compartment. It may be the one that has been made.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a mounting state of a vehicle air conditioner 1 according to an embodiment of the present invention on a vehicle.
FIG. 2 is a horizontal cross-sectional schematic diagram showing a schematic structure of the blower unit 10 in one embodiment of the present invention.
FIG. 3 is a graph showing an operation pattern of each door when switching between an inside air introduction mode and an outside air introduction mode.
4 is a schematic diagram showing the operating state of each door at the position A in FIG. 3. FIG.
FIG. 5 is a schematic diagram showing an operating state of each door at a position B in FIG. 3;
6 is a schematic cross-sectional view showing a schematic structure of a conventional blower unit 10. FIG.
[Explanation of symbols]
2 ... Vehicle compartment 10 ... Blower unit 11 ... Blower unit case 12 ... Inside air inlet 13 ... Outside air inlet 14 ... Inside air opening / closing door (inside air opening / closing means)
15A ... First outside air opening / closing door (outside air opening / closing means 15, first outside air opening / closing means)
15B ... Second outside air opening / closing door (outside air opening / closing means 15, second outside air opening / closing means)
16 ... Rotating shaft 17 ... Scroll casing (air blowing means)
18 ... Blower motor (air blowing means)
19 ... Blower fan (fan means)
20 ... Air conditioning unit

Claims (3)

An air conditioning unit (20) which is installed in a vehicle compartment (2) of the vehicle and has an air conditioning device inside and forms an air passage;
In a vehicle air conditioner provided with a ventilation unit (10) which has ventilation means (17-19) inside and blows air to the air conditioning unit (20).
A vehicle outside the vehicle compartment (2) and an internal air inlet (12) formed in the air blower unit case (11) of the air blower unit (10) and communicating with the interior of the vehicle compartment (2) to introduce vehicle interior air. An outside air introduction port (13) that communicates inside and introduces outside air in the passenger compartment,
An inside air opening / closing means (14) for opening and closing the inside air introduction port (12) provided in the blower unit case (11), and an outside air opening / closing means (15) for opening and closing the outside air introduction port (13). And providing
The vehicle air conditioner characterized in that the inside air opening / closing means (14) and the outside air opening / closing means (15) are configured such that one of them closes and the other opens. The outside air opening / closing means (15) includes two parts, a first outside air opening / closing means (15A) and a second outside air opening / closing means (15B), and the inside air opening / closing means (14) and the first outside air. The vehicle air conditioner according to claim 1, wherein the second outside air opening / closing means (15B) is opened when both the opening / closing means (15A) are closed. In the blower unit (10), the inside air opening / closing means (14) and the second outside air opening / closing means (15B) are provided between the inside air introduction port (12) and the outside air introduction port (13), The second outside air opening / closing means (15B) is arranged on the side farther from the inside air introduction opening (12) than the inside air opening / closing means (14), and the second outside air opening / closing means (15B) is cantilevered. The second outside air opening / closing means (15B) is configured from a side far from the inside air introduction port (12) by being constituted by a plate door and arranging the rotation shaft (16) on the inside air introduction port (12) side. The vehicular air conditioner according to claim 1 or 1, wherein the vehicular air conditioner is opened toward the inside air inlet (12).

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