JPH0754007Y2 - Air introduction device for vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an air introducing device for a vehicle air conditioner.

(Prior Art) An air conditioner for a vehicle is configured by disposing a blower, a cooler unit, a heater unit, and the like in a cowl box,
The inside or outside air in the vehicle compartment is taken in by an air introduction device to perform air conditioning in the vehicle compartment.

Conventionally, as the above-mentioned air introduction device, one described in Japanese Utility Model Laid-Open No. 64-42912 is known. This actual development 64-42912
In the air introduction device of the publication, a hollow rectangular parallelepiped inside / outside air switching box is connected to a scroll casing, a bottom wall of the inside / outside air switching box has an outlet port communicating with the inside of the scroll casing, and a top wall has an outside air inlet port. The first and second inside air introduction ports are formed on the side walls facing each other in the width direction, and the outside air introduction port and the first inside air introduction port are formed.
There is provided a first inside / outside air switching damper for switching to and from the inside air introducing port and a second inside / outside air switching damper for switching between the outside air introducing port and the second inside air introducing port.

(Problems to be Solved by the Invention) In the air introducing device described above, the first inside air introducing port and the second inside air introducing port are formed on the opposite side walls in the vehicle width direction to expand the inside air intake opening area. The sizes of the damper, the outside air introduction port, and the inside air introduction port are closely related, and when one is decided, the other two are also decided. It is difficult to enlarge only the inside air introduction port, and it is possible to enlarge the inside air intake opening. The area was also small.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an air suction device capable of further increasing the inside air suction area and reduce the suction resistance of the inside air.

(Means for Solving the Problem) The present invention provides an outside air introduction port at one end of an inside / outside air switching box that communicates with a scroll casing that accommodates a fan, and a second side wall opposite to the inside / outside air switching box. First and second inside air inlets are opened and pivotally attached to the inside / outside air switching box via first and second hinge shafts arranged between the first and second inside air inlets and the outside air inlet. The first and second
In the air introducing device for opening and closing the inside / outside air switching damper to switch the intake air between the inside air introducing port and the outside air introducing port, the first inside air introducing port and the first inside / outside air changing damper are
Is provided larger than the inside air introduction port and the second inside / outside air switching damper, and when the first and second inside air introduction ports are open, the first inside air introduction port is opened.
The gist of the inside / outside air switching damper is to provide a link mechanism for closing the outside air introduction port with a predetermined delay with respect to the second inside / outside air switching damper.

(Operation) According to the air introducing device of the present invention, the first inside air introducing port can be made larger than the second inside air introducing port, so that the inside air suction area can be increased. The size of the first and second switching dampers is restricted by the size of the first and second inside air introduction ports, and the sizes are different. However, these dampers close the outside air introduction port with a predetermined delay due to the link mechanism. The switching dampers do not interfere with each other.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 6 show an air introducing device according to an embodiment of the present invention, and FIG. 1 and FIG. 2 are sectional views of essential parts in different states, and FIGS. 3 (a) (b) (c). Is a side view showing the link mechanism in a different state, FIG. 4 is an overall sectional view of the air conditioner, FIG. 5 is an overall perspective view of the air conditioner, and FIG. It is a figure.

4 and 5, (A) shows an air conditioner for a vehicle, and the air conditioner (A) is unitized as shown in FIG. 5 and arranged in a cowl box (not shown). . This air conditioner (A) is an air introducing device
11, a blower device 12, an evaporator 13, and a heater unit 14, and the evaporator 13 and the heater unit 14 are housed in a duct case 15. The air introducing device 11 and the blower device 12 are provided in the front part of the duct case 15, and the duct case 15 has an air passage 16 defined therein, and the evaporator 13 and the heater unit 14 are interposed in the air passage 16. Further, the duct case 15 is provided with a defroster outlet 18 which is opened and closed by a defroster door 17, a vent outlet 20 which is opened and closed by a vent door 19 and a heater outlet (not shown). Each of the outlets 18 and 20 opens into the passenger compartment. The heater unit 14 has a heater core 21 and two air mix dampers 22.

The air introducing device 11 is composed of two units 11a and 11b, and the blower device 12 is also composed of two units 12a and 12b.
As shown in FIG. 5, the units 11a and 11b of the air introducing device 11 and the units 12a and 12b of the blower device 12 are alternately arranged in the vehicle width direction. As shown in FIG. 6, the blower device 12 includes a hollow scroll casing 23 for each unit 12a, 12b and a fan 50 driven by a motor (not shown). In this blower device 12, the unit 12a takes in air from the unit 11a of the air introducing device 11 and sends the air into the air passage 16, and the unit 12a takes the air introducing device 11 as well.
The air is taken in from the unit 11b and sent into the air passage 16.

Each unit 11a, 11b of the air introducing device 11 has a hollow rectangular parallelepiped inside / outside air switching box 24, and a side portion of the inside / outside air switching box 24 is joined to a side portion of a scroll casing 23. In addition, these units 11a, 11b and the blower device 1 described above.
Each of the two units 12a and 12b has the same configuration, and the same portions will be described with the same numbers. Inside / outside air switching box 24
As is apparent from FIGS. 1, 2 and 6, the upper wall is formed by bending the two hypotenuses into a substantially V shape, and the outside air inlets 25a and 25b are formed in the front and rear, respectively. The first and second inside air introduction ports 26 and 27 are formed on the side walls of the above, and the delivery port 28 is formed on the side wall of the scroll casing 23 side in the vehicle width direction. The outside air inlets 25a and 25b have substantially the same size (area),
The inside air introduction ports 26, 27 are different in size, the first inside air introduction port 26 at the front is larger than the second inside air introduction port 27 at the rear, and the delivery port 28 is formed into a substantially circular shape inside the scroll casing 23. It is open. In addition, in FIG. 1 and FIG. 2, 29 is a bulkhead separating the rear of the engine room,
On the rear side of the bulkhead 29, a communication passage 30 that communicates the inside air introduction port 26 and the vehicle interior is defined.

In addition, in the inside / outside air switching box 24, a first inside / outside air switching damper 31 for adjusting the opening degree between the outside air introduction port 25a and the first inside air introduction port 26.
Also, a second inside / outside air switching damper 32 for adjusting the opening degree between the outside air introducing port 25b and the second inside air introducing port 27 is provided via the first and second hinge shafts 31a and 32a, respectively. The first inside / outside air switching damper 31 is larger than the second inside / outside air switching damper 32, and the first inside / outside air switching damper 31 is substantially equal in size to the first inside air introducing port 26 capable of closing the first inside air introducing port 26. Has a
Similarly, the second inside / outside air switching damper 32 has substantially the same size as the second inside air introducing port 27. One end of the first inside / outside air switching damper 31 is swingably supported at a front upper corner of the inside / outside air switching box 24, and one end of the second inside / outside air switching damper 32 is also inside / outside air switching box 24.
These dampers 31 and 32 are swingably supported at the upper rear corner of the
Are integrally connected to a motor (not shown) via a link mechanism 33.

The link mechanism 33 includes a motor lever 34, a first link 35, a second link 36, a first lever 37 and a second lever 38, as shown in FIGS. 3 (a), (b) and (c). Have.
One end of the first lever 37 is coupled to the end portion of the first inside / outside air switching lever 31 on the support side and swings integrally with the first inside / outside air switching lever 31, and the elongated hole 37a is formed on the other end side. Has been formed. Similarly, one end of the second lever 38 is coupled to the end portion of the second inside / outside air switching lever 32 on the supporting side to swing together with the second inside / outside air switching lever 32, and the other end side is extended. The hole 38a is formed. The first link 35 has a substantially rectangular plate shape, one corner portion is rotatably supported, and a slide pin 35a is provided at a corner portion opposite to this corner portion so that the first lever 37 is provided. Slot 37a
It is slidably fitted in and has a cam hole 39. The cam hole 39 has a substantially L shape having an arc portion 39a and a straight portion 39b. Further, the second link 36 is rotatably supported at the center thereof, has a slide pin 36a at one end thereof, and is slidably fitted into the elongated hole 38a of the second lever 38, and is provided at the other end thereof. A substantially L-shaped cam hole having an arc portion 40a and a straight portion 40b
40 are formed. The motor lever 34 has a substantially L-shape having a bent portion in the middle, and the bent portion is fixed to the output shaft of the motor and is slidable in the cam hole 39 of the first link 35 at one end. Is provided with a slide pin 34a, and the other end is provided with a slide pin 34b which is slidably fitted into the cam hole 40 of the second link 36.

In the air introducing device 11 of this embodiment, as shown in FIG. 1, the dampers 31 and 32 close the inside air introducing ports 26 and 27 to take in outside air (outside air introducing state), as shown in FIG. Thus, the dampers 31 and 32 close the outside air introduction ports 25a and 25b and take in the inside air (inside air introduction state). Here, this air introduction device 11 is
Since the first inside air introduction port 26 is enlarged without changing the sizes of the outside air introduction ports 25a and 25b, the suction resistance of the inside air can be reduced without enlarging the inside / outside air switching box 24.

In addition, the air introduction device 11 includes the first inside / outside air switching damper.
31 is formed to have a size capable of closing the first inside air introduction port 26 and is larger than the second inside / outside air switching damper 32. However, as described below, the dampers 31, 32 are connected by the link mechanism 33. Each damper 31, 32
Will not interfere. That is, in the link mechanism 33, the outside air introduction state is shown in FIG. 3 (a) and the inside air introduction state is shown in FIG. 3 (c), and when the outside air introduction state is changed to the inside air introduction state, the motor lever 34 is indicated by an arrow in the figure. The slide pins 34a and 34b of the motor lever 34 slide in the cam hole 39 of the first link 35 and the cam hole 40 of the second link 36, respectively. Since the arc portion 39a of the hole 39 is located with the bending portion of the motor lever 34 as the center of curvature, only the second link 36 rotates clockwise in the figure due to the swing of the motor lever 34, and FIG. As shown in (3), only the second inside / outside air switching damper 32 operates to close the outside air introduction port 25b. When the motor lever 34 is subsequently rotated, the slide pin 34a slides on the straight portion 39b of the cam hole 39 of the first link 35 and the slide pin 34b slides on the arc portion 40a of the cam hole 40 of the second link 36. However, since the arc portion 40a of the cam hole 40 of the second link 36 is positioned with the bending portion as the center of curvature, only the first link 35 rotates and the first inside / outside air switching damper 31 operates, As shown in FIG. 3 (c), a first inside / outside air switching damper
31 closes the outside air inlet 25a. The transition from the inside air introduction state to the outside air introduction state is performed in the reverse process to the above-mentioned case, and the first inside / outside air switching damper 31 closes the first inside / outside air introduction port 26 and then the second inside / outside air changeover. The damper 32 closes the second inside air inlet 27 and opens the outside air inlets 25a and 25b.

(Effect of the Invention) As described above, according to the air introduction device of the vehicle air conditioner of the present invention, the inside air introduction port is enlarged to increase the inside air suction resistance without enlarging the inside / outside air switching box. The effect of being small can be obtained.

Further, when the first and second inside / outside air switching dampers are opened by the link mechanism, the inside / outside air switching damper having the smaller area is swung first, so that the inside / outside air switching dampers may interfere with each other. Absent.

[Brief description of drawings]

1 to 6 show an air introducing device of an air conditioner for a vehicle according to an embodiment of the present invention, and FIG. 1 and FIG.
The figure is a cross-sectional view in the state where the main part is different, FIG.
Drawing (b) and Drawing 3 (c) are side views in the state where a link mechanism differs, respectively, Drawing 4 is a whole sectional view of an air harmony device, Drawing 5 is a whole perspective view of an air harmony device, and Drawing 6 FIG. 3 is a partially enlarged schematic perspective view. A: Air conditioner for vehicle 11: Air introduction device 11a, 11b, 12a, 12b: Unit 16: Air passage 23: Scroll casing 24: Inside / outside air switching box 25a, 25b: Outside air inlet 26 ...... First inside air inlet 27 ...... Second inside air inlet 28 ...... Outlet 31 ...... First inside / outside air switching damper 32 ...... Second inside / outside air switching damper 33 ...... Link mechanism

Claims (1)

[Scope of utility model registration request] 1. An outside air inlet is provided at one end of an inside / outside air switching box that communicates with a scroll casing containing a fan, and first and second inside air inlets are provided on two opposing side walls of the inside / outside air switching box. First and second openings, which are pivotally attached to the inside / outside air switching box via first and second hinge shafts arranged between the first and second inside air introducing ports and the outside air introducing port.
In the air introducing device that opens and closes the inside / outside air switching damper to switch intake air between the inside air introducing port and the outside air introducing port, the first inside air introducing port and the first inside / outside air changing damper include the second inside air introducing port. The opening is larger than the second inside / outside air switching damper, and when the first and second inside air introducing ports are open, the first inside / outside air switching damper has a predetermined delay with respect to the second inside / outside air switching damper. An air introducing device for a vehicle air conditioner, which is provided with a link mechanism for closing the outside air introducing port.