JP2537272Y2 - Automotive air conditioners - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner for a vehicle capable of independent left / right or front / rear air distribution such as a driver seat and a passenger seat or a front seat and a rear seat. .

[0002]

2. Description of the Related Art FIG. 5 is a schematic view of an air conditioner for a vehicle which can perform left and right independent air distribution. Alternatively, an intake unit 15 for blowing air selectively taken in from outside air intake 14 with fan 1, a cooler unit 2 having an evaporator 16 for cooling the air from intake unit 15, and air cooled by cooler unit 2 And a heater unit 3 that blows out after heating a part or the like by the heater core 17 and adjusting the temperature to an appropriate temperature. This blower connects a differential duct (not shown), a vent duct 21, and a foot duct 22 to a differential air outlet 18, a vent air outlet 19, and a foot air outlet 20 opened in the heater unit 3, and from the air outlets of these ducts. The air is distributed to a predetermined part in the vehicle interior. Note that “M” in the figure is a motor.

In this vehicle air conditioner of the left and right independent air distribution type, since air is distributed to the driver's seat side D and the passenger's seat side A, the branch vent duct 6 is connected to the vent outlet 19, The four air outlets 4a, 4b of the vent duct 6
Air is blown out from 5a and 5b. In this apparatus, a central duct 7 is provided between the branch vent duct 6 and the heater unit 3 in order to more evenly distribute the air distribution, and the inside of the central duct 7 is partitioned by a central partition wall 23 to form a branch passage 9a. , 9b. Further, the air distribution door 8 is provided at the end of the partition wall 23, and the air distribution door 8 is rotated left and right by a predetermined angle from the neutral position, so that the ratio of the air blown out from the driver seat side D and the passenger seat side A is increased. Is adjusted.

[0004]

However, in the conventional left and right independent air distribution type vehicle air conditioner, for example, when the air volume on the driver's seat side is reduced, the air distribution door is simply turned to the position shown in FIG. However, there is a drawback that the wind speed passing through the branch vent duct on the driver's seat side increases and noise is generated. Moreover, in this case, only the reduced amount of the airflow on the driver's seat side is discharged to the passenger's seat side, so that the airflow on the passenger's seat side is increased and the feeling of the passenger's seat is impaired. The present invention has been made in view of such a problem of the related art, and in a vehicle air conditioner of a type in which air is blown independently from air outlets separated from each other, a wind distribution door rotates. The purpose is also to maintain the noise level at a constant value.

[0005]

According to the present invention, there is provided a unit (2, 3) for cooling or heating air blown from an intake unit (15) provided with a fan (1). And a branch duct (6) for blowing out the air from at least a pair of air distribution ports (4a, 4b, 5a, 5b) separated from each other through a center duct (7). In the air conditioner for an automobile, an air distribution door (8) is provided at a center to form branch passages (9a, 9b) communicating with the air distribution ports (4a, 4b, 5a, 5b). Openings (10, 11) are provided on the left and right side walls of (7), and open / close doors (10D, 11D) are provided toward the upstream side of the air to open and close these openings (10, 11), respectively. The openings (10, 11) and the An automobile air conditioning system is characterized in that communication between the fan upstream of the emissions take unit (15) via a feedback duct (12).

[0006]

According to the present invention, the air blown by the fan (1) is converted into desired conditioned air by the cooling unit (2) and / or the heating unit (3), and then the central duct is formed. The air is discharged from the air outlets (4a, 4b, 5a, 5b) via (7) and the branch duct (6). At this time, when the air distribution door (8) is rotated from the neutral position, the respective air volume ratios blown out from the pair of air distribution ports (4a, 4b / 5a, 5b) are changed. When the opening / closing door (10D) provided in the center duct (7) on the side where 8) is rotated is opened and the opposite opening / closing door (11D) is closed, the air distribution door (8) is rotated. The air that has flowed down along the side wall of the side central duct is returned to the intake unit (15) from the opening (10) via the return duct (12). As a result, the amount of air passing through the branch duct (9a) narrowed by the rotation of the air distribution door (8) decreases, so that the noise level can be maintained at a constant value. In addition, although the ventilation resistance of the branch duct (9b) on the enlarged side is reduced by the rotation of the air distribution door (8), the amount of air passing therethrough is similarly reduced. It is possible to prevent the occupant from feeling uncomfortable with little change in the air volume.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing one embodiment of the present invention, FIGS.
FIG. 4 is a conceptual diagram of a vent duct for explaining the operation of the embodiment. The same members as those shown in FIG. 5 are denoted by the same reference numerals, and the description thereof is partially omitted.

The air conditioner for a vehicle according to this embodiment has an intake unit 15, a cooler unit 2, and a heater unit 3. The intake unit 15 has a built-in fan 1 for blowing air and a motor M for rotating the fan, and an intake door 24 is mounted on the upstream side of the fan 1 so that air is appropriately selected and introduced from the vehicle interior or exterior. It is supposed to. The cooler unit 2 is provided with an evaporator 16 for cooling or dehumidifying the passing air, in which a refrigerant circulates, and the passing air is cooled by heat exchange with the refrigerant. Further, the heater unit 3 is provided with a heater core 17 for heating the passing air, and a detour 25 is formed on a side portion. Engine coolant circulates through the heater core 17, and the passing air is exchanged with heat to be heated. On the upstream side of the heater core 17, a mix door 26 for controlling the amount of air flowing through the heater core 17 and the bypass 25 to adjust the temperature of the air blown into the vehicle interior is rotatably mounted. The heated air passing through the heater core 17 and the air flowing through the detour 25 are mixed in the mixing chamber 27 and controlled to a predetermined temperature. The temperature-controlled air is supplied from a differential air outlet 18, a vent air outlet 19, a foot air outlet 20, a differential duct (not shown) connected to each of the air outlets 18, 19, 20 provided in the heater unit 3, Through a duct 21 and a foot duct 22, a predetermined portion in the vehicle cabin from the air distribution opening of each duct, that is, the inner surface of the windshield in the case of the differential outlet 18, the upper body of the occupant in the case of the vent outlet 19, In the foot outlet 20, air is respectively distributed to the feet of the occupant. Each of the outlets 18, 19, 20 has a differential door 28, a vent door 29, and a foot door 30.
Are provided, these doors 28, 29, 30
Is controlled, the air distribution site is determined.

The vehicle air conditioner according to the present embodiment
Although the branch vent duct 6 communicates with the above-described vent outlet 19 to perform left and right independent air distribution, the branch vent duct 6 and the heater unit 3 are used to more evenly distribute the air distribution. And a central duct 7 is provided. A partition wall 23 is provided at the center of the center duct 7, and two branch passages 9a and 9b are formed. Also,
At the tip of the partition wall 23, an air distribution door 8 extends in the surface direction of the partition wall 23 so that the distribution ratio between the right and left sides can be appropriately adjusted. The air distribution door 8 has an opening detection means (for example, a potentiometer (PB) provided in an actuator for driving the air distribution door) for detecting an opening of the air distribution door from a neutral position.
R), not shown), and control means (not shown) for controlling the opening degree data detected by the opening degree detecting means.
To control the operation of the opening and closing doors 10D and 11D described later.

Openings 10 and 11 are respectively formed on the left and right side walls of the central duct 7 substantially parallel to the plane direction of the air distribution door 8, and an opening / closing door 10D for opening and closing these openings 10 and 11 is provided. , 11D are provided rotatably. It is preferable that the rotation axes of the opening and closing doors 10D and 11D are set on the downstream side with respect to the flowing direction of the air. In this embodiment, as shown in FIG. It is provided to be. These openings 10 and 11 communicate with an opening 24 opened on the upstream side of the fan 1 of the intake unit 15 via a return duct 12. This return duct 12 is, as shown in FIG.
After merging from the respective openings 10 and 11, it may be connected to the opening 24 of the intake unit 15, or may be connected from the respective openings 10 and 11 to the intake unit 15 by respective return ducts.

[0011] The two opening and closing doors 10D, 1 according to the present embodiment.
1D, the opening / closing control is performed according to the opening degree of the air distribution door 8, and as described above, the opening degree of the air distribution door 8 is detected by a PBR or the like, and based on the data, the control means controls the two opening / closing doors 10 based on this data.
The signals are output to an actuator (not shown) that controls the operation of D and 11D. Further, without being limited to the opening / closing operation by such an actuator, for example, the air distribution door 8 is provided by a link mechanism.
And the two opening and closing doors 10D and 11D may be controlled.

The control means takes in the opening degree data from the opening degree detecting means of the air distribution door 8 and, when the air distribution door 8 is rotated in any direction from the neutral position, according to the amount of rotation. The opening degree of the two open / close doors 10D and 11D is calculated. Specifically, the greater the amount of rotation of the air distribution door 8, the greater the ventilation resistance of the branch vent duct (the branch vent duct 9 a in the state shown in FIG. 3) on the rotated side. The noise generated by the opening and closing door 1 provided on the side wall of the central duct 7 corresponding to the turning direction of the air distribution door 8 also increases.
When opening 0D, a part of the air flowing down along this side wall returns to the intake unit 15 from the opening 10 via the return duct 12, and the air volume passing through the narrowed branch vent duct 9a is also reduced. Since it is reduced, generation of noise can be suppressed. On the other hand, a larger amount of air than the air flow before the rotation of the air distribution door 8 is going to flow through the branch vent duct on the enlarged side (the branch vent duct 9b in the state shown in FIG. 3). Since a part of the air passing through 7 is returned from the opening 10 to the intake unit 15 by the return duct 12, the air flow having the same air volume as before the rotation is caused by the reduction of the air volume, thereby causing the airflow fluctuation to the occupant. Can reduce the sense of incongruity. The control means of the present embodiment controls the number of revolutions of the fan on the basis of the opening degree data and the number of revolutions data based on the above concept.

Next, the operation will be described with reference to FIGS. FIG. 2 shows the air distribution door rotated to the neutral position, FIG.
4 shows a state in which the air distribution door is turned to the driver seat side, and FIG. 4 shows a state in which the air distribution door is turned to the passenger seat side. As shown in FIG. 2, when the air distribution door is at the neutral position, all of the openable and closable doors close the opening. As a result, the conditioned air passing through the center duct is equally divided by the air distribution doors, flows into the left and right branch vent ducts, and is then blown into the passenger compartment from the air distribution ports.

On the other hand, when reducing the air volume on the driver's seat side D, the air distribution door 8 is swung to the driver's seat side D as shown in FIG. Thus, the amount of air flowing into the branch vent duct 9a on the driver's seat side D is substantially determined by the inner wall of the central duct 7 and the tip of the air distribution door 8. Here, if the amount of air blown by the fan 1 is constant, the wind speed passing through the narrowed branch vent duct 9a on the driver's seat side D, which is narrowed, increases, so that the noise generated therefrom naturally increases. In the case of the present embodiment, the rotation position of the air distribution door 8 is detected by the opening degree detection means and output to the control means. The control means outputs a command signal to the actuator of the opening / closing door 10D. Door 8
The opening / closing door 10 </ b> D on the side where the opening 10 starts to open according to the amount of rotation of the air distribution door 8, and after guiding a part of the air flowing down along the side wall where the opening 10 is opened into the return duct 12, Return to intake unit 15. Accordingly, the amount of air passing through the narrowed branch vent duct 9a is also reduced, so that generation of noise can be suppressed. On the other hand, at this time, a larger amount of air than the air volume before the rotation of the air distribution door 8 is going to flow through the branch vent duct on the enlarged side (the branch vent duct 9b in the state shown in FIG. 3). Central duct 7
A part of the air passing through is returned from the opening 10 to the intake unit 15 by the return duct 12, and the reduced airflow allows air having the same airflow as before the rotation to pass, thereby causing the occupant to vary the airflow due to the airflow fluctuation. The feeling of discomfort given can be reduced. Conversely, when the air volume on the passenger side A is reduced, as shown in FIG.
In this case, the operation opposite to that described above is achieved.

In the above-described embodiment, the left and right vent ducts are distributed independently. However, the present invention is not limited to this embodiment, and can be applied to, for example, the foot duct 22. .

[0016]

As described above, according to the present invention, openings are respectively opened on the left and right side walls of the center duct, and open / close doors are provided toward the upstream side of the air so as to open and close these openings, respectively. The opening and the upstream side of the fan of the intake unit are communicated via the return duct, so noise generated when independent air distribution is performed can be suppressed, and in addition to this, occupants feel uncomfortable due to fluctuations in air distribution. Can be alleviated.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a vent duct for explaining the operation of the embodiment, in which the air distribution door is in a neutral position.

FIG. 3 is a conceptual diagram showing a vent duct for explaining the operation of the embodiment, showing a state in which an air distribution door is located on a driver's seat side.

FIG. 4 is a conceptual diagram showing a vent duct for explaining the operation of the embodiment, showing a state in which an air distribution door is on a passenger seat side.

FIG. 5 is a conceptual diagram showing a conventional automobile air conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fan, 2 ... Cooler unit, 3 ... Heater unit, 4a, 5a ... Driver side air outlet, 4b, 5b ... Passenger side air outlet, 6 ... Branch duct, 7 ... Central duct, 8 ... Air distribution door,
9a, 9b ... branch passage, 10, 11 ... opening,
10D, 11D: openable door, 12: return duct.

Claims (1)

(57) [Scope of request for utility model registration] 1. A unit (2, 3) for cooling or heating air blown from an intake unit (15) in which a fan (1) is installed, and at least one pair of air distribution ports (23) separating the air from each other. 4a, 4b, 5a, 5b) and a branch duct (6) which blows out through a central duct (7). An air distribution door (8) is provided at the center of the central duct (7) to provide each of the air distribution ports. In a vehicle air conditioner having a branch passage (9a, 9b) communicating with (4a, 4b, 5a, 5b), openings (10, 11) are respectively formed in left and right side walls of the center duct (7). At the same time, opening and closing doors (10D, 11D) are provided toward the upstream side of the air so as to open and close these openings (10, 11), respectively, so that the openings (10, 11) and the intake unit (15) can be opened and closed. Return the fan upstream Automotive air conditioning apparatus characterized by communicating through the door (12).