JP2004314759A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce air-blowing noise transmitted to a driver seat side area in a cabin, in an air conditioner for a vehicle of center-placement layout in which a fan unit and an air conditioning unit are arranged at an approximately central part in a left/right direction of the vehicle. <P>SOLUTION: The air conditioner for the vehicle is provided with the fan unit 11; and the air conditioning unit self-containing a heat exchanger for heat-exchanging with the fan air of the fan unit 11. Both the fan unit 11 and the air conditioning unit are arranged at the approximately central part in the left/right direction of the vehicle. A single intake type air-blowing fan 19 having an intake port 20c only at a front passenger seat side in the left/right direction of the vehicle is provided and an external air intake port 23 and an internal air intake port 25 are arranged at a front passenger seat side position of the intake port 20c in the fan unit 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle air conditioner having a center-placed layout in which a blower unit and an air conditioner unit having a built-in heat exchanger are arranged substantially at the center in the vehicle left-right direction.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a vehicle air conditioner, a center-placed layout in which both a blower unit and an air conditioning unit are disposed substantially at the center in the vehicle left-right direction is known from Patent Document 1 and the like.
[0003]
In Patent Literature 1, the air conditioning unit is disposed at a substantially central portion in the vehicle left-right direction in the vehicle interior, and the blower unit is disposed at a substantially central portion in the vehicle left-right direction within the engine room. Therefore, the blower unit is arranged on the vehicle front side of the air conditioning unit.
[0004]
In this prior art, the rotation axis of the centrifugal blower fan of the blower unit is arranged in the left-right direction of the vehicle, a passage portion for outside air suction is formed on the vehicle front side above the blower fan, and the inside air suction passage is formed on the vehicle rear side above the centrifugal fan. Is described.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-94944
[Problems to be solved by the invention]
In the above prior art, the specific arrangement of the inside air suction port and the outside air suction port with respect to the suction port of the blower fan is not specified, but in this type of center-placed layout, the fan drive motor is usually a two-axis motor. A blower fan is arranged on both left and right sides of the two-axis motor, and suction ports are arranged on both left and right sides of the two blower fans, and an inside air intake port and an outside air intake port communicating with the left and right both sides are connected to the blower unit. They are arranged symmetrically.
[0007]
Therefore, the inside air suction ports of the blower unit will be disposed on the left and right sides of the blower unit in the engine room, and the left and right inside air suction ports will be passed through the inlet passages arranged on the left and right sides of the blower unit. It communicates with the cabin space.
[0008]
Therefore, the inside air inlet passage is configured to open to the driver's seat side area and the passenger's seat side area in the vehicle cabin at both left and right sides of the blower unit. Therefore, the blowing noise generated by the rotation operation of the blowing fan propagates through the inside air inlet passage to both the driver's seat side area and the passenger's seat side area in the vehicle compartment. In particular, since the driver is always in the driver's seat side area in the vehicle cabin, blast noise that propagates to the driver through the driver's seat side inside air inlet passage poses a serious problem in practice.
[0009]
The present invention has been made in view of the above circumstances, and in a vehicle-mounted air conditioner having a center-placed layout in which a blower unit and an air conditioning unit are both disposed substantially at the center in the vehicle left-right direction, the blowing noise transmitted to the driver's seat side area in the vehicle compartment is reduced. The purpose is to do.
[0010]
Another object of the present invention is to provide a center-placed vehicle air conditioner in which both a blower unit and an air conditioning unit are arranged substantially at the center in the vehicle left-right direction, so that the inside air suction airflow can be secured effectively.
[0011]
[Means for Solving the Problems]
To achieve the above object, according to the first aspect of the present invention, an air conditioning unit (13) incorporating a blower unit (11) and a heat exchanger (17, 18) for exchanging heat with air blown by the blower unit (11). ) And
In a vehicle-mounted air-conditioning system having a center-placed layout in which a blower unit (11) and an air-conditioning unit (13) are both arranged substantially at the center in the vehicle left-right direction,
The blower unit (11) is provided with a single-suction type blower fan (19) having a suction port (20c) only on the passenger seat side in the vehicle left-right direction,
The blower unit (11) is characterized in that an outside air suction port (23) and an inside air suction port (25) are arranged at a portion on the passenger seat side of the suction port (20c).
[0012]
According to this, air is blown from the outside air suction port (23) and the inside air suction port (25) arranged at the passenger seat side portion of the suction port (20c) by the single suction type blower fan (19), and the air conditioning unit ( 13) can be blown. Further, the outside air intake port (23) and the inside air intake port (25) can be arranged at the passenger seat side portion in the vehicle left-right direction of the blower unit (11), and can be kept away from the driver seat side area in the vehicle interior. For this reason, it is advantageous in reducing the blowing noise in the driver's seat side area in the vehicle interior in the outside air mode and the inside air mode.
[0013]
According to the second aspect of the present invention, the blower unit (11) is disposed substantially at the center in the vehicle left-right direction in the engine room (10), and the blower unit (11) is positioned substantially at the center in the vehicle left-right direction within the vehicle compartment (12). And an air-conditioning unit (13) having heat exchangers (17, 18) for exchanging heat with the air blown by the blower unit (11).
The blower unit (11) is provided with a single-suction type blower fan (19) having a suction port (20c) only on the passenger seat side in the vehicle left-right direction,
In the blower unit (11), an outside air suction port (23) and an inside air suction port (25) are arranged at a passenger seat side portion of the suction port (20c), and an inlet passage (25a) of the inside air suction port (25) is connected to an engine room. It is characterized in that it is formed from inside (10) to the vehicle interior (12) and communicates the entrance passage (25a) into the vehicle interior (12).
[0014]
According to this, in the vehicle air conditioner of the center-placed layout in which the blower unit (11) is arranged in the engine room (10) and the air conditioning unit (13) is arranged in the vehicle compartment (12), the same operation as in claim 1 is performed. The effect can be demonstrated.
[0015]
According to the third aspect of the present invention, in the second aspect, the blower fan (19) is a centrifugal blower fan disposed in the scroll casing (20), and the inlet passage (25a) is provided at least in the scroll casing (20). ) Has a portion located on the passenger seat side of the outlet duct portion (20b).
[0016]
As a result, the inside air intake port (25) in the engine room (10) is separated from the interior passage (25a) by the inlet passage (25a) located on the passenger seat side of the blow-out duct (20b) of the scroll casing (20). Can be communicated linearly and smoothly.
[0017]
According to a fourth aspect of the present invention, in the third aspect, the inlet passage (25a) extends from the passenger seat side region of the blow-out duct portion (20b) of the scroll casing (20) to the upper region of the blow-out duct portion (20b). It is characterized in that it is formed in a cross-sectional shape of a passage.
[0018]
Thereby, the passage area of the inlet passage (25a) of the inside air suction port (25) is enlarged in an L shape, and the pressure loss of the inside air suction can be reduced. Therefore, even if the blower fan (19) in the engine room (10) is a single-suction type blower fan, it is easy to secure the inside air suction amount.
[0019]
In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means described in embodiment mentioned later.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a vehicle air conditioner according to the present embodiment in a state where the air conditioner is mounted on a vehicle. The vehicle air conditioner includes a blower unit 11 disposed in an engine rule 10 and an air conditioner unit 13 disposed in a passenger compartment 12. They are roughly divided into The engine rule 10 and the cabin 12 are partitioned by a vehicle partition (firewall) 14.
[0021]
FIG. 2 is a schematic perspective view of the blower unit 11 viewed from the direction of arrow A in FIG. 1, FIG. 3 is a schematic sectional view showing the arrangement of the inside air intake port and the outside air intake port of the blower unit 11, and FIG. It is the schematic front view of the blower unit 11 seen from the arrow direction. Arrows of front, rear, up, down, left and right in FIGS. 1 to 4 indicate directions in a vehicle mounted state. Note that the present embodiment is a vehicle air conditioner mounted on a left-hand drive vehicle. Therefore, the left side of the vehicle is the driver's seat side and the right side of the vehicle is the passenger's seat side.
[0022]
The air-conditioning unit 13 is disposed in the vehicle compartment 12 immediately behind the vehicle partition wall 14, and more specifically, in a vehicle left-right direction inside a frontmost instrument panel (not shown) in the vehicle compartment 12. The air conditioning unit 13 is arranged at a substantially central portion of the air conditioner. The blower unit 11 is disposed in the engine room 11 immediately in front of the vehicle partition 14 at a substantially central portion in the vehicle left-right direction. Accordingly, the blower unit 11 and the air conditioning unit 13 are arranged adjacent to each other through the vehicle partition wall 14 in the vehicle front-rear direction, and the blower unit 11 and the air conditioning unit 13 are arranged substantially in the center in the vehicle left-right direction. The layout is centered.
[0023]
The air-conditioning unit 13 has a case 15 made of resin, and forms an air passage in which the conditioned air flows from the front side to the rear side of the vehicle. An air purifying filter 16 is arranged at the most upstream side (vehicle front side) in the case 15, and an evaporator serving as a cooling heat exchanger is provided at a downstream side (vehicle rear side) of the filter 16. A heater core 18 serving as a heat exchanger for heating is disposed downstream of the evaporator 17.
[0024]
As is well known, a low-pressure refrigerant decompressed by the decompression means of the refrigeration cycle flows into the evaporator 17, and the low-pressure refrigerant absorbs heat from the conditioned air in the case 15 and evaporates, thereby cooling the conditioned air. ing. The heater core 18 reheats the cold air that has passed through the evaporator 17, in which high-temperature hot water (engine cooling water) flows, and heats the air using the hot water as a heat source. Note that the air conditioning unit 13 in this example is configured to control the temperature of the air blown into the vehicle cabin by adjusting the flow rate of hot water to the heater core 18.
[0025]
A plurality of well-known blowing openings (not shown) for blowing the conditioned air whose temperature has been adjusted by the heater core 18 are arranged at the downstream end (the rear end of the vehicle) of the air passage of the case 15. That is, a face opening that blows conditioned air toward the upper body of the occupant, a foot opening that blows conditioned air toward the foot of the occupant, and a defroster that blows conditioned air toward the inside of the vehicle window glass. An opening is provided, and the face opening, the foot opening, and the defroster opening are opened and closed by a blowing mode door (not shown).
[0026]
Next, the blower unit 11 will be described in detail. As shown in FIG. 1, the blower unit 11 has a blower fan 19 composed of a centrifugal multi-blade fan disposed in a spiral scroll casing 20. Here, the rotating shaft 19a of the blower fan 19 is arranged so that the axial direction thereof is oriented in the direction perpendicular to the plane of FIG. 1, that is, in the left-right direction of the vehicle (see FIG. 3).
[0027]
The scroll casing 20 is arranged so that the spiral shape thereof is oriented in the vertical direction, the winding start portion (nose portion) 20a of the scroll casing 20 is arranged above the blower unit 11 on the vehicle rear side, and the scroll casing 20 blows out. The duct portion 20b is arranged below the winding start portion (nose portion) 20a, that is, below the blower unit 11 on the vehicle rear side.
[0028]
The outlet duct portion 20 b of the scroll casing 20 passes through the inside of the through hole 14 a of the vehicle partition wall 14 and is connected to the upstream end of an air passage in the case 15 of the air conditioning unit 13.
[0029]
FIG. 3 schematically shows a passage configuration inside the blower unit 11, and the scroll casing 20 is provided with a bell mouth-shaped suction port 20c only on the right side in the vehicle left-right direction, that is, only on the passenger seat side. Therefore, the blower fan 19 is a single-suction type fan that sucks air from only the right side of the vehicle in the left-right direction, that is, only from the passenger seat side as shown by the arrow a. For this reason, the drive motor 21 of the blower fan 19 is disposed on the left side in the vehicle left-right direction, that is, on the driver's seat side.
[0030]
The blower fan 19 rotates the drive motor 21 in the direction of the arrow b in FIG. 1 to blow the intake air from the suction port 20 c to the radially outer side, and further blows the air along the scroll shape of the scroll casing 20. 20b, and the air is blown from the outlet duct portion 20b to the vehicle rear side as shown by the arrow c.
[0031]
In the blower unit 11, an inside / outside air intake passage is formed in the right side portion of the scroll casing 20, that is, inside the case 22 located on the passenger seat side. Specifically, the outside air suction port 23 is disposed in the case 22 at a position on the right side of the bell mouth-shaped suction port 20c. The outside air intake port 23 communicates with the space in the engine room 10 and sucks outside air (outside the vehicle compartment) from the engine room 10 into the case 22. An outside air door 24 that opens and closes the outside air suction port 23 is disposed in the case 22 immediately after the outside air suction port 23. The outside air door 24 is constituted by a plate door that can be rotated by a rotation shaft 24a.
[0032]
In the case 22, an inside air inlet 25 is disposed at a position on the vehicle rear side of the bell mouth-shaped inlet 20c. The entrance passage 25a formed on the vehicle rear side of the inside air intake port 25 passes through the inside of the through hole 14a of the vehicle partition 14 and communicates with the vehicle interior 12 as shown in FIG. Is sucked into the case 22. Inside the case 22, an inside air door 26 that opens and closes the inside air suction port 25 is disposed in an entrance passage 25 a of the inside air suction port 25.
[0033]
The inside air door 26 is constituted by a plate door that can be rotated by a rotation shaft 26a. The rotating shaft 24a of the outside air door 24 is connected to an outside air door operating mechanism via a link mechanism (not shown), and the rotating shaft 26a of the inside air door 26 is connected to the inside air door operating mechanism via a link mechanism (not shown).
[0034]
The outside air door 24 and the inside air door 26 can be operated in conjunction with each other by the outside air door operation mechanism and the inside air door operation mechanism, and the outside air door 24 and the inside air door 26 can be individually operated by each operation mechanism. The outside air door operation mechanism and the inside air door operation mechanism are each configured by an actuator mechanism using a servomotor, but the outside air door operation mechanism and the inside air door operation mechanism may be configured by a manual operation mechanism.
[0035]
Then, in order to reduce the inside air suction pressure loss, the passage area of the inlet passage 25a is enlarged as follows as compared with the passage area of the inside air suction port 25. That is, as shown in FIGS. 2 and 4, a substantially rectangular connection end 27 corresponding to the shape of the through hole 14 a of the vehicle partition wall 14 is formed at the vehicle rear end of the blower unit 11.
[0036]
An outlet duct portion 20b of the scroll casing 20 is arranged below the vehicle left side (driver's seat side) inside the connection end portion 27, and other portions except the outlet duct portion 20b, that is, the outlet duct portion 20b is provided. The entire L-shaped passage cross-sectional shape (the narrow dot area in FIG. 4) from the upper portion to the right side (passenger seat side) of the blow-out duct portion 20b is configured as an inlet passage 25a of the inside air suction port 25, and the L-shaped passage is formed. The entire cross-sectional shape communicates with the interior space of the vehicle interior 12.
[0037]
Next, the operation of the present embodiment in the above configuration will be described. Now, when the outside air door 24 and the inside air door 26 are operated to the solid line position in FIG. 3 by the inside / outside air door operation mechanism, the outside air suction port 23 is fully closed, the inside air suction port 25 is fully opened, and the inside air mode is set. Therefore, when the drive motor 21 of the blower unit 11 is energized by an air-conditioning control device (not shown) (not shown) and the blower fan 19 is rotated by the drive motor 21 in the direction of arrow b in FIG. The inside air is sucked only from the inside air suction port 25 communicating with the interior space of the vehicle interior 12.
[0038]
This inside air is sucked into the scroll casing 20 from the bell mouth-shaped suction port 20c, and is guided to the outlet duct section 20b along the scroll shape of the scroll casing 20. Further, the inside air is blown from the outlet duct portion 20b to the rear side of the vehicle as shown by an arrow c, and flows into the case 15 of the air conditioning unit 13. The blown air is adjusted to a desired temperature in the air conditioning unit 13, and thereafter, the air is blown from a predetermined blow opening toward a predetermined area in the vehicle compartment.
[0039]
Next, when the outside air door 24 and the inside air door 26 are operated to the broken line positions in FIG. 3 by the inside / outside air door operation mechanism, the outside air suction port 23 is fully opened, the inside air suction port 25 is fully closed, and the outside air mode is set. . At this time, only the outside air is sucked from the outside air intake port 23 and is blown into the air conditioning unit 13, so that the outside air can be adjusted to a desired temperature in the air conditioning unit 13 to perform air conditioning in the passenger compartment.
[0040]
Further, if the outside air door 24 and the inside air door 26 are operated to the intermediate position between the solid line position and the broken line position in FIG. 3, an inside / outside air mixing mode for simultaneously sucking in the outside air and the inside air can be set.
[0041]
By the way, according to the blower unit 11 of the present embodiment, the following unique operation and effect can be exhibited. That is, the bell mouth-shaped suction port 20c of the scroll casing 20 is disposed only on the passenger seat side in the vehicle left-right direction, and the blower fan 19 is a single-suction type fan that sucks air only from the passenger seat side in the vehicle left-right direction. The outside air suction port 23 and the inside air suction port 25 are arranged on the right side of the front passenger seat side suction port 20c, that is, on the front passenger seat side.
[0042]
Therefore, both the outside air intake port 23 and the inside air intake port 25 are kept away from the driver's seat side area in the vehicle cabin, and it is possible to reduce the propagation of the inside and outside air suction noise of the blower fan 19 to the driver's seat side area in the vehicle cabin.
[0043]
In addition, the inside air suction port 25 is disposed at the passenger seat side of the single-suction type blower fan 19, but the entrance passage (vehicle rear side passage) 25a of the inside air suction port 25 is shown in a fine dot area in FIG. As described above, the entire area from the upper part of the outlet duct part 20b to the right side part of the outlet duct part 20b is effectively used to form an L-shaped passage sectional shape, so that the passage area of the inlet passage 25a is effectively enlarged. it can. Thus, even if the blower fan 19 is a one-sided suction fan, the passage pressure loss of the inside air suction is reduced, and it becomes easy to secure the inside air suction amount.
[0044]
Although the passage area of the inlet passage 25a of the inside air inlet 25 is enlarged to the upper part of the blow-out duct portion 20b, it is different from the prior art in which the inlet passage of the inside air inlet is provided on the left and right sides of the blower unit. Thus, the opening position of the entrance passage 25a of the inside air suction port 25 can be shifted to the passenger seat side. As a result, the blowing noise that propagates through the entrance passage 25a of the inside air intake port 25 to the driver's seat side area in the vehicle compartment can be reduced as compared with the related art.
[0045]
(Other embodiments)
In the above-described embodiment, the blower unit 11 is disposed in the engine room 10 at a substantially central portion in the vehicle left-right direction, and the air conditioning unit 13 is disposed in the vehicle compartment 12 at a substantially central portion in the vehicle left-right direction. Although the air conditioner for a vehicle having a center-placed layout has been described, in a vehicle in which a space in which the blower unit 11 can be arranged in the passenger compartment 12 in front of the air conditioner unit 13 can be secured, both the blower unit 11 and the air conditioner unit 13 What is necessary is just to arrange | position in the center of the vehicle left-right direction in the room 12.
[0046]
In the above-described embodiment, the winding start portion (nose portion) 20a of the scroll casing 20 is disposed above the rear side of the blower unit 11 on the vehicle side, and the blowing duct portion 20b of the scroll casing 20 is wound (nose portion). ) Is disposed below the blower unit 11, that is, at a lower portion on the vehicle rear side of the blower unit 11. On the contrary, the winding start portion (nose portion) 20 a of the scroll casing 20 is positioned rearward of the blower unit 11 on the vehicle side. Side, and the blow-out duct portion 20b of the scroll casing 20 may be arranged above the winding start portion (nose portion) 20a, that is, above the blower unit 11 on the vehicle rear side.
[0047]
Therefore, in this modified example, the entrance passage 25a of the inside air suction port 25 is formed in an L-shaped passage cross-sectional shape from the passenger seat side region of the blow-out duct portion 20b to the lower region of the blow-out duct portion 20b. In the above modification, the rotation direction of the blower fan 19 is set to a direction opposite to the direction of the arrow b in FIG. 1 (clockwise direction).
[0048]
Further, in the above-described embodiment, as shown in FIG. 3, the outside air door 24 and the inside air door 26 are each constituted by a cantilever plate door in which rotary shafts 24a and 26a are arranged at ends of the plate door. Needless to say, the outside air door 24 and the inside air door 26 may each be constituted by a butterfly door having rotating shafts 24a and 26a arranged at the center of a plate door.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a vehicle mounted state according to an embodiment of the present invention.
FIG. 2 is a schematic perspective view showing a blower unit according to one embodiment of the present invention, as viewed in the direction of arrow A in FIG. 1;
FIG. 3 is a schematic sectional view of a blower unit according to an embodiment of the present invention.
FIG. 4 is a schematic front view showing a blower unit according to an embodiment of the present invention, as viewed in the direction of arrow A in FIG. 1;
[Explanation of symbols]
10 ... engine room, 11 ... blower unit, 12 ... car room,
13 air conditioning unit, 17 evaporator (heat exchanger for cooling),
18 ... heater core (heat exchanger for heating), 19 ... blower fan,
Reference numeral 20: scroll casing, 20b: blow-out duct, 20c: suction port,
23: outside air inlet, 25: inside air inlet, 25a: inlet passage.

Claims (4)

A blower unit (11);
An air conditioning unit (13) incorporating heat exchangers (17, 18) for exchanging heat with the air blown by the blower unit (11);
In a vehicle-mounted air conditioner having a center-placed layout in which both the blower unit (11) and the air-conditioning unit (13) are arranged substantially at the center in the vehicle left-right direction,
The blower unit (11) is provided with a single-suction type blower fan (19) having a suction port (20c) only on the passenger seat side in the vehicle left-right direction,
An air conditioner for a vehicle, wherein an outside air intake port (23) and an inside air intake port (25) are arranged in a part of the blower unit (11) on the passenger seat side of the intake port (20c). A blower unit (11) disposed substantially at the center in the vehicle left-right direction in the engine room (10);
An air conditioning unit (13) which is disposed at a substantially central portion in the vehicle left-right direction in the vehicle compartment (12) and has a built-in heat exchanger (17, 18) for exchanging heat with the air blown by the blower unit (11); In a vehicle air conditioner with a center layout
The blower unit (11) is provided with a single-suction type blower fan (19) having a suction port (20c) only on the passenger seat side in the vehicle left-right direction,
In the blower unit (11), an outside air suction port (23) and an inside air suction port (25) are arranged at a passenger seat side portion of the suction port (20c),
An entrance passage (25a) of the inside air suction port (25) is formed from the interior of the engine room (10) toward the compartment (12), and the entrance passage (25a) is formed in the compartment (12). An air conditioner for a vehicle, which is in communication. The blower fan (19) is a centrifugal blower fan arranged in a scroll casing (20),
The vehicular air conditioner according to claim 2, wherein the inlet passage (25a) has a portion located at least on a passenger seat side of an outlet duct portion (20b) of the scroll casing (20). . The entrance passage (25a) is formed in an L-shaped passage cross-sectional shape extending from a passenger seat side region of the blow duct portion (20b) of the scroll casing (20) to an upper region of the blow duct portion (20b). The vehicle air conditioner according to claim 3, wherein:

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