JP2002120543A - Inside/outside air changeover device of air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the power by suppressing the power consumption and to provide a compact and appropriately functioning mechanism in an inside/outside air changeover device of an air conditioner for a vehicle selectively taking air from the compartment of the vehicle and the outside of the vehicle. SOLUTION: A first inside/outside air changeover door alternately opening/ closing an outside air suction port and a first inside air suction port, and a second inside/outside air changeover door alternately opening/closing an outside air passage and a second inside/outside air suction port are provided with a lever A and a lever D turning coaxially respectively and an interval therebetween is connected by another lever, a cam and a link mechanism so as to be formed into a transmission mechanism. The transmission mechanism is connected to the changeover switch in a driver's cab by an operation cord so that this device can become compact without any driving electric power in opening/closing of the respective inside/outside air changeover doors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inside / outside air switching device for a vehicle air conditioner which selectively takes in air from the inside of a vehicle and the outside of the vehicle.

[0002]

2. Description of the Related Art An outline of a conventional inside / outside air switching device for a vehicle air conditioner will be described with reference to FIGS.

FIG. 7 is a cross-sectional view of an air intake portion of a conventional inside / outside air switching device of a vehicle air conditioner. FIG. 8 is a diagram showing the inside / outside air switching device in which an inside / outside air switching door drive link mechanism is in a vehicle interior air intake state. FIG. 9 is an operation explanatory view of the inside / outside air switching device in a state where the outside air is taken in the vehicle compartment.

[0004] An air intake portion of the inside / outside air switching device in the conventional vehicle air conditioner is provided in an operator's cab to perform inside / outside air switching control, and an inside / outside air switching switch;
Temperature control of the vehicle interior from T (high temperature area) to MAX COOL (low temperature area), DEF (driver's seat front window direction side), DEF & FOOT (driver's seat front window direction and driver's seat foot side side), FOOT (driver's seat side) Foot side), FOOT
& FACE (driver's seat feet and driver's face side) or FA
The operation is performed based on a selection instruction of an inside air mode, an inside air / outside air mode, or an outside air mode selected based on a calculation result of an electronic control device that controls a vehicle interior wind direction such as CE (driver's seat face side).

To explain the outline of the structure, the inside / outside air switching device partitions the inside of the air passage into two, a first air passage 1 and a second air passage 2, and these first and second air passages 2 are provided. The centrifugal multi-blade type fans 3 and 4 are arranged in the air passages 1 and 2 respectively to blow air. This blowing method is generally called a two-layer flow unit.

[0006] An inside air state in which vehicle interior air (hereinafter, referred to as inside air) is introduced into the first and second air passages 1 and 2, or an outside air state in which outside vehicle interior air (hereinafter, referred to as outside air) is sent; The outer case 5 of the inside / outside air switching device is set to an inside / outside air state in which outside air is sent to the passage and inside air is sent to the other air passage.
Is provided with an outside air inlet 6, a first inside air inlet 7, and a second inside air inlet 8.

The outside air suction port 6 and the first inside air suction port 7 forming the first air passage 1 are provided with a second air inlet 6 and a second air inlet 7 which are closed when one of them is opened. One inside / outside air switching door 10 is disposed, and the outside air passage 9 and the second inside air suction port 8 provided in the outer case 5 forming the second air passage 2 are provided with the two suction ports as described above. When one of 8 and 9 is opened, a second inside / outside air switching door 11 that closes the other is arranged.

Since the first inside / outside air switching door 10 is integrated with the rotation axis 21 of the lever A20 provided outside the outer case 5, the rotation of the lever A20 causes the outside air suction port 6 and the first inside air / outside air switching port 10 to be connected to the first inside / outside air switching port. The inside air inlets 7 are alternately opened and closed.

Further, since the second inside / outside air switching door 11 is integrated with the rotation axis 26 of the lever D25 provided on the outside of the outer casing 5, the rotation of the lever D25 allows the outside air passage 9 and the second air switching door 11 to be connected to each other. The inside air inlets 8 are alternately opened and closed.

[0010] By the rotation of the servomotor 30 installed outside the outer case 5, the lever B33 about the fulcrum B32 is rotated through a connecting rod B31 rotatably connected to the servomotor 30. Rotation axis 2 of lever A20
The lever A20 having 1 as a rotation center is operated.

The engagement hole 22 of the lever A20 which engages with the engagement pin A34 of the lever B33 is provided when the first inside / outside air switching door 10 closes the outside air suction port 6 or the first inside air suction port 7. A play portion 22a is provided for keeping the first inside / outside air switching door 10 closed even when the lever B33 further rotates.

The lever B33 rotates the lever C37 about the fulcrum C36, and rotates the lever D25 via a connecting rod D40 connecting the engaging pin C38 of the lever C37 and the engaging pin D27 of the lever D25. Move.

At this time, after the first inside / outside air switching door 10 closes the first inside air suction port 7, the engagement hole 39 of the lever C37, which engages with the engagement pin B35 of the lever B33, closes the lever B33. When the rotation is advanced, a guide portion 39a is formed so as to rotate the lever C37, and the rotation of the lever C37 causes the lever D25 to rotate through the connecting rod D40.

Since the conventional vehicle air conditioner is configured as described above, in the inside air mode, the lever A33 is rotated rightward by the servo motor 30 to rotate the lever A20 upward and the lever A20 is rotated. The first inside / outside air switching door 10, which is coaxial with the first air passage, is rotated to open the first inside air suction port 7 and close the outside air suction port 6, and to open the first air passage 1
To enable the introduction of inside air.

The lever C37 engaged with the engagement pin B35 of the lever B33 holds the lever D25 in a state where the lever D25 is rotated rightward through the connecting rod D40.
The second inside / outside air switching door 11, which is coaxial with the first inside air, opens the second inside air suction port 8 and closes the outside air passage 9 so that inside air can be introduced into the second air passage 2.

In the inside / outside air mode, the lever A33 is turned leftward by the servo motor 30, so that the lever A20 is turned downward and the first inside / outside air switching door 10 coaxial with the lever A20 is turned. The first air inlet 6 is opened while the first air inlet 7 is closed, and external air can be introduced into the first air passage 1.

At this time, the lever C37 engaged with the engagement pin B35 of the lever B33 is moved to the engagement pin B3 of the lever B33.
Since the lever 5 has not reached the guide portion 39a of the engagement hole 39 of the lever C37, the lever D25 is held in a state of being rotated rightward via the connecting rod D40, and the second inside / outside air switching coaxial with the lever D25 is performed. The door 11 opens the second inside air suction port 8 and closes the outside air passage 9 so that inside air can be introduced into the second air passage 2.

In the outside air mode shown in FIG. 9, the lever B33 is further rotated to the right by the servo motor 30 from the state of the inside and outside air mode, so that the engagement pin A34 of the lever B33 engages with the engagement hole 22 of the lever A20. And the lever A20 keeps rotating downward, the first inside / outside air switching door 10 coaxial with the lever A20 closes the first inside air suction port 7 and closes the outside air suction port 6. The open state is maintained, and the outside air introduction state to the first air passage 1 is continued.

Further, the lever C37 engaged with the engagement pin B35 of the lever B33 rotates the guide portion 39a of the engagement hole 39 of the lever C37 through the connection pin D40. The lever D25 is turned to the left, and the second inside / outside air switching door 11 coaxial with the lever D25 opens the outside air passage 9 and closes the second inside air suction port 8 to introduce outside air into the second air passage 2 as well. Make it possible.

[0020]

However, in the above-described conventional inside / outside air switching device for a vehicle air conditioner, the intake air is selectively introduced from the room inside the vehicle and from the outside of the vehicle. A lever and a link mechanism for opening and closing the first inside / outside air switching door and the second inside / outside air switching door for selecting the above, and using a motor such as a servomotor as a drive source thereof, the same motor Electric power for driving is consumed, and the load is large in electric vehicles and the like.

Further, the servo motor and the like for providing the driving force of the first inside / outside air switching door and the second inside / outside air switching door are mounted outside the outer case, so that the size and size are reduced. It was one of the points where improvement and improvement were required as on-vehicle equipment oriented to the future.

The present invention solves such problems in the conventional apparatus, suppresses the consumption of extra power, saves electric power, and aims at a more compact and properly functioning mechanism. It is an object of the present invention to provide an inside / outside air switching device for a vehicle air conditioner which is directed to the following.

[0023]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. As a first means, first and second air passages are formed in an outer case to introduce outside air. An outside air suction port and a first inside air suction port for introducing inside air are provided so as to be able to communicate with the first air passage, and are arranged in parallel with the outside air passage communicating with the outside air suction port and the first inside air suction port. A second inside air suction port for introducing inside air is provided so as to be able to communicate with the second air passage, and when one of the outside air suction port and the first inside air suction port is opened, the other is closed. An inside / outside air switching device for a vehicle air conditioner provided with a second inside / outside air switching door that closes the other when one of the outside air passage and the second inside air suction port is opened, Lever A that rotates coaxially with the first inside / outside air switching door A lever D that rotates coaxially with the second inside / outside air switching door, and a transmission mechanism is formed by connecting the lever A and the lever D with another lever, a cam, and a link mechanism. It is an object of the present invention to provide an inside / outside air switching device of a vehicle air conditioner connected to a changeover switch in a cab by an operation cable.

That is, according to the first means, the first inside / outside air switching door for alternately opening and closing the outside air suction port and the first inside air suction port, and the second inside air suction port for alternately opening and closing the outside air passage and the second inside air suction port. The second inside / outside air switching door is provided with a lever A and a lever D that rotate coaxially, and a transmission mechanism is formed by connecting a lever, a cam, and a link mechanism therebetween, and the transmission mechanism is formed. Since the operation cable is connected to the changeover switch in the cab, the first and second inside / outside air switching doors are operated by the operation cable via the transmission mechanism according to the mode selected by the changeover switch. The desired inside / outside air switching is performed by a compact and simple mechanism without requiring drive power for opening and closing the second inside / outside air switching door.

According to the present invention, as a second means, in the first means, a lever B for operating the lever A connected to a lever A which rotates coaxially with the first inside / outside air switching door is provided. The invention also provides an inside / outside air switching device for a vehicle air conditioner in which the lever B is connected to an inside / outside air changeover switch in a cab by an operation cable, and can be switched to inside air introduction or outside air introduction.

That is, according to the second means, the first inside / outside air switching door for alternately opening and closing the outside air suction port for introducing outside air and the first inside air suction port for introducing inside air is coaxial with the first inside / outside air switching door. The rotating lever A is operated by an operation cable connected to an inside / outside air changeover switch in a cab via a lever B connected to the lever A, and requires a simple and compact mechanism without requiring special driving power. It is possible to switch to inside air introduction or outside air introduction.

According to a third aspect of the present invention, as the third means, in the second means, a hook portion for engaging the lever B is provided, and the lever D for rotating the second inside / outside air switching door is provided on the lever D. An engaging pin that engages with a hook portion is provided, and when the inside air is introduced, the lever B is rotated by the operation of the operation cable, and the lever A and the lever D are rotated by following the operation, and the first and second levers are rotated. Activating the second inside / outside air switching door, opening the first and second inside air suction ports, closing the outside air suction port and the outside air passage, and opening the inside air to the first and second air passages. It is an object of the present invention to provide an inside / outside air switching device of a vehicle air conditioner which enables intake and stops introduction of outside air or inside / outside air.

That is, according to the third means, the second means
In addition to the above-described means, a hook portion is provided on the lever B, and an engaging pin provided on a lever D that rotates coaxially with a second inside / outside air switching door that opens and closes the outside air passage and the second inside air suction port alternately is provided. The first and second inside / outside air switching are performed by engaging the hook portion, operating the operating rope at the time of introducing the inside air, rotating the lever B, and following the rotation, rotating the lever A and the lever D to follow the movement. Activating the door, opening the first and second inside air suction ports and closing the outside air suction port and the outside air passage, without requiring special driving power, the first and second mechanisms are simple and compact. The internal air can be taken into the second air passage, and the switching to stop the introduction of the outside air or the introduction of the inside and outside air is made possible.

According to a fourth aspect of the present invention, in the second means, the lever B is provided with an engaging hook portion and the lever D is provided with an engaging pin which engages with the hook portion. At the time of introducing outside air, the lever B is turned by the operation of the operation cable, the lever A engaged with the lever B is turned, and the first inside / outside air switching door coaxial with the lever A is operated. It is an object of the present invention to provide an inside / outside air switching device of a vehicle air conditioner in which one inside air suction port is closed and the outside air suction port is opened so that outside air can be taken into the first air passage.

That is, according to the fourth means, the second means
In addition to the above means, a hook portion is provided on the lever B, and an engaging pin for engaging the hook portion is provided on the lever D,
When the outside air is introduced, the operation cable is operated to rotate the lever B,
Following this, the lever A is rotated to operate the first inside / outside air switching door, and the first inside air suction port is closed and the outside air suction port is opened, so that extra driving power is required. Instead, the outside air can be taken into the first air passage by a compact and simple mechanism.

According to a fifth aspect of the present invention, in the first aspect, when introducing outside air and inside and outside air,
A cam receiving portion D is provided on the lever D, and the lever D is configured to rotate by engaging with a cam portion C provided on a cam C;
The present invention provides an inside / outside air switching device for a vehicle air conditioner, which is operable by connecting the cam C to a wind direction changeover switch provided in a vehicle cab and controlling a blowing direction of blowing air by an operation cable.

That is, according to the fifth means, the lever D
And a cam C or the like engaged with the cam C. The cam C is actuated by an operation cable connected to a wind direction changeover switch for controlling a blowing direction of the blowing air provided in the vehicle cab. By rotating D, the second inside / outside air switching door or the like connected to the same lever D is operated, and the introduction of outside air or inside / outside air is stopped by a compact and simple mechanism without special driving power. Switching is possible.

According to a sixth aspect of the present invention, as the sixth means, in the first means, a lever A which rotates coaxially with the first inside / outside air switching door to rotate the first inside / outside air switching door. A lever B for operating the lever A by connecting the lever B to an inside / outside air changeover switch is connected to the inside / outside air changeover switch by an operation cable. The cam C is connected to a wind direction changeover switch provided in the vehicle cab by an operation cable so as to rotate the lever D by engaging with the cam C provided on the C, and the cam C is engaged with the lever D. The cam C is mounted around the engaging pin of the lever F as a center of rotation, and the operating position of the lever F is regulated by a cam E engaging with the lever F or a cam G constantly engaged in the approach direction by a tension spring, and The cam G is connected to a temperature changeover switch provided in a cab by an operation cable. It continued, and the there is provided an outside air switching device of a vehicle air conditioning system that can be operated by each operating rope.

That is, according to the sixth means, the inside / outside air changeover switch, the wind direction changeover switch and the temperature changeover switch provided in the vehicle cab are engaged with the levers B and D for operating the lever A. The first inside / outside air switching door and the second inside / outside air switching door are rotatably driven by connecting and operating the cam C to be engaged and the cam G to be engaged with the lever F by operating lines, respectively. It is possible to perform desired switching such as introduction of outside air or introduction of inside air with a simple and compact mechanism without requiring electric power.

According to a seventh aspect of the present invention, as the seventh means, the first means includes a lever B for operating the lever A by being connected to a lever A which rotates coaxially with the first inside / outside air switching door. When the switch is connected to the inside / outside air changeover switch provided in the cab of the vehicle with the operation line and the inside / outside air changeover switch is set to introduce the outside air, the lever B is operated with the operation line by the inside / outside air changeover switch. The first inside / outside air switching door connected to the lever A is operated by the rotation of the lever A engaged with the first inside air to close the first inside air suction port, and the outside air suction port is opened to open the first inside air suction port. A cam receiving portion D is provided on a lever D that rotates coaxially with the second inside / outside air switching door so that outside air can be introduced into the air passage, and the lever D is rotated by engaging with the cam portion C provided on the cam C. Wind direction switching with cam C installed in the vehicle cab to move The cam C, which is connected to the switch by an operation cable, and is engaged with the lever D by the cam portion C, is mounted around the engagement pin of the lever F as a rotation center. The operating position is regulated by a cam G that is constantly urged and engaged in the approaching direction, and the cam G is connected to a temperature changeover switch provided in an operator's cab with an operation cable, and the changeover range of the temperature changeover switch is set to a low temperature region or operating the setting state of the high-temperature region, when the wind direction select switch setting conditions other than the driver's seat front window direction, the cam portion G ₁ of the cam G actuates the cam E, the cam portion E of the cam E is the lever F The cam portion C of the cam C engaged with the lever F by the engaging pin is
To operate the second inside / outside air switching door interlocked with the lever D, open the second inside air suction port, close the outside air passage, and take in inside air into the second air passage. It is an object of the present invention to provide an inside / outside air switching device for a vehicle air conditioner that is enabled.

That is, according to the seventh means, the operation cable connects to the inside / outside air changeover switch, the lever B operates the first inside / outside air changeover door via the lever A, and the operation line connects to the wind direction changeover switch. Then, the cam C for operating the second inside / outside air switching door via the lever D, and the operation cable are connected to the temperature changeover switch, and the second inside / outside air switching door is operated via the cam E, the lever F and the like. Operated by the cam G and the like, the first inside / outside air switching door and the second inside / outside air switching door are rotatable, and no special driving power is required, and the outside air or inside air is introduced by a compact and simple mechanism. The desired switching is possible.

Further, the present invention provides, as an eighth means, the operation of the seventh means, wherein the wind direction changeover switch is operated in place of setting the wind direction changeover switch to a setting condition other than the driver's seat front window direction side. By setting a cam mechanism that releases the engagement between the cam portion C of the cam C and the cam receiving portion D of the lever D when the seat is set to the front window direction side, the temperature switch is set to a high temperature region, an intermediate temperature region, and a low temperature region. It is an object of the present invention to provide an inside / outside air switching device for a vehicle air conditioner, in which the inside / outside air mode is not set when the wind direction changeover switch is located in the driver's seat front window direction side, regardless of the position of the region.

That is, according to the eighth means, the engagement between the cam C and the lever D is released when the setting of the wind direction switch is changed from a direction other than the driver's seat front window direction to the driver's seat front window direction. Therefore, the inside / outside air mode is not set irrespective of the setting of the temperature range, and these controls can be dealt with by a compact and simple mechanism without requiring any special driving power.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view showing a changeover switch arranged in a driver's cab in a vehicle air conditioner having an inside / outside air switching device according to the present embodiment, and FIG. 2 is an inside air intake of an inside / outside air switching door driving mechanism of the inside / outside air switching device. FIG. 3 is an explanatory view showing an introduction state, and FIG. 3 shows outside air / DEF / MAX COO.
Explanatory diagram showing the outside air introduction state under the L mode selection condition, FIG.
Is an explanatory diagram showing the inside / outside air introduction state under the outside air / FACE / MAX COOL mode selection condition, and FIG. 5 is the outside air / FACE.
FIG. 6 is an explanatory diagram showing the outside air introduction state under the condition of selecting the medium / intermediate temperature region mode, and FIG. 6 shows the outside air / FACE / MAX COO.
It is explanatory drawing which shows the inside / outside air introduction state under L mode selection conditions.

That is, the inside / outside air switching device according to the present embodiment is an inside / outside air selection switch 161, a wind direction switching switch 162, and a temperature switching switch 163 provided on an cab panel 160 provided in the cab. The operation is performed based on the mode, the inside / outside air mode, or the outside air mode selection instruction condition.

In each of the above switches, the inside / outside air changeover switch 161 controls the opening / closing of the inlet of the air intake unit in response to an instruction to switch between “inside air” and “outside air”.

The wind direction changeover switch 162 is a switch for instructing the direction of air-conditioned air to be blown into the vehicle compartment. The following abbreviations are used: "DEF" (front window side of the driver's seat).
[DEF and FOOT] (driver's seat front window direction and driver's seat foot side), “FOOT” (driver's seat foot side), “FOOT”
And FACE ”(driver's seat feet and driver's seat face side) and“ FACE ”(driver's seat face side) can be selected.
When "F" is selected, a structure that does not enter the inside / outside air state is provided.

The temperature changeover switch 163 sets the temperature in the cabin and sets a predetermined set temperature range to “MAX”.
HOT ”area (high temperature area), intermediate temperature area, and“ MA ”
When classified into the “XCOOL” area (low temperature area), “MAX”
In both areas of “HOT” and “MAXCOOL”, the inside / outside air state can be configured except when “DEF” is selected.

The inside / outside air switching device divides the inside of the air passage into two, a first air passage 101 and a second air passage 10.
2 and these first and second air passages 101, 10
2 are arranged so that centrifugal multi-blade fans 103 and 104 are arranged and blown.

In order to select and switch between an inside air state in which inside air is sent to both air passages 101 and 102 or an outside air state in which outside air is sent, and an outside air state in which outside air is sent to one air passage and inside air is sent to the other air passage, The outside air suction port 106 and the first inside air suction port 10 are provided in the outer case 105 of the inside / outside air switching device.
7 and the second inside air suction port 108 are installed.

The outside air suction port 106 and the first inside air suction port 107 communicating with the first air passage 101 are provided with one of the two suction ports 106 and 107 when the other is closed. An outer case 105 in which an inside / outside air switching door 110 is arranged and which communicates with the second air passage 102
Outside air passage 109 and second inside air suction port 108
A second inside / outside air switching door 111 that opens one of the suction ports 108 and 109 and closes the other.
Place.

The first inside / outside air switching door 110 is provided with a rotation axis A of a lever A 120 provided outside the outer case 105.
121, the outside air suction port 106 and the first inside air suction port 107 are rotated by the rotation of the lever A120.
Are alternately opened and closed as described above.

Further, the second inside / outside air switching door 111 is connected to the rotation axis 1 of a lever D125 provided outside the outer case 105.
26, the outside air passage 109 and the second inside air suction port 108 are alternately opened and closed similarly to the first inside / outside air switching door 110 by the rotation of the lever D125.

Outside the outer case 105, inside and outside air switching operation cables 180 directly connected to the inside and outside air switching switch 161 of the cab panel 160, a wind direction switching operation cable 185 directly connected to the wind direction switching switch 162, and a temperature switching switch 163.
A temperature switching operation cable 190 directly connected to the operation cable holding section B1
81, operation cable holding unit C186 and operation cable holding unit G191
Respectively.

The operation cable B182 for transmitting the operating force installed inside the inside / outside air switching operation cable 180 is provided with a lever B13.
3 and is rotatably connected.

The lever B133 has a fulcrum B132 planted in the outer case 105 as a center of rotation, and has a lever A1 at one end.
20 with an engaging pin 134 for operation, and a lever D at the other end.
A hook portion 133a for 125 operation is formed. The lever A120 rotates about the rotation axis A121 as the center of rotation, and the lever B133 is rotated by the link engagement hole 120a.
And rotate by engaging with the engagement pin 134.

The lever D125 rotates about the rotation axis 126 as the center of rotation, and rotates when the engaging pin 127 implanted in the lever D125 is pushed by the hook 133a of the lever B133.

Note that a second inside / outside air switching door 111 coaxially mounted on the lever D125 by a spring 129 is biased in a direction to close the second inside air suction port 108.
An operation cable C187, which is provided inside the wind direction mode switching operation cable 185 and transmits an operating force, is loosely fitted to the cam C140 and is rotatably connected thereto.

The cam C140 is rotatably mounted on an engaging pin 156 implanted in the lever F155.
The cam portion C140a of 140 slides when it comes into contact with the cam receiving portion D125a of the lever D125, and regulates the rotational position of the lever D125.

The lever F155 is rotatably mounted on a fulcrum F157 implanted in the outer case 105, and the cam G
Tension spring 1 disposed between the fulcrum 145 and the fulcrum G146
49 acts on the cam G145.

Further, the cam receiving portion F _{1 of the} lever F155 is provided.
155a is a fulcrum E151 planted in the outer case 105.
E150 of the cam E150 rotatably mounted on the cam E150
The rotation position is regulated by a.

An operation cable G192 installed inside the temperature switching operation cable 190 for transmitting an operating force is loosely fitted to the cam G145 and is rotatably connected thereto.

The cam G145 has a fulcrum G146 planted in the outer case 105 as a center of rotation, and a cam portion G around the cam.
₁ 145a, cam portion G ₂ 145b and cam portion G ₃ 145
forming a c, the cam receiving portion F ₂ 15 cam receiver E150b or lever F155 cam E150 during contact actuation
5b, and regulates the rotation position of the cam E150 or the lever F155.

The inside air introduction state will be described with reference to FIG. 2 showing a state where the inside air mode is set in the present embodiment configured as described above. That is, when changing from the outside air introduction state to the inside air introduction state, the cab panel 160
The inside / outside air changeover switch 161 is operated to change to "inside air".

With this change, the inside / outside air changeover switch 16
The operation cable B1 of the inside / outside air switching operation cable 180 connected to the control cable 1
The lever 82 is pulled to the right as shown in FIG. 2, and the lever B133 is rotated to the right about the fulcrum B132 as the center of rotation.

Accordingly, the lever A120 engaged with the engagement pin 134 provided on the lever B133 is
The first inside air outside opening 107 is opened while the first inside outside opening 107 is opened and the outside outside air opening 106 is closed by rotating the first inside / outside air switching door 110 coaxial with the lever A120. Inside air is introduced into the air passage 101.

The hook 133a of the lever B133 pivots the second inside / outside air switching door 111 coaxial with the lever B133 to rotate the engagement pin 127 of the lever D125, and the second inside air suction port 108 is rotated. And the outside air passage 109 is closed, and inside air is introduced into the second air passage 102.

At this time, no matter what position the wind direction changeover switch 162 and the temperature changeover switch 163 are set, that is, the wind direction changeover operation line C187 and the temperature changeover operation line G
Regardless of the position of 192, the cam C140 is held by the hook portion 133a of the lever B133, so that the cam C140 becomes independent of the cam receiving portion D125a of the lever D125.
The second inside / outside air switching door 111 is connected to the second inside air suction port 10.
8, the outside air passage 109 is closed.

Next, the outside air introduction state will be described with reference to FIG. 3 showing a state in which the outside air / DEF / MAX COOL mode is set. When changing from the inside air introduction state to the outside air introduction state, the inside / outside air changeover switch 161 of the cab panel 160 is operated to change to “outside air”.

With this change, the inside / outside air changeover switch 16
The operation cable B1 of the inside / outside air switching operation cable 180 connected to the control cable 1
82 is pushed to the left as indicated by the arrow in FIG.
Reference numeral 33 rotates leftward about the fulcrum B132.

Accordingly, the lever A 120 engaged with the engaging pin 134 provided on the lever B 133 is
Rotating clockwise around the center 121 as shown by the arrow, turning the first inside / outside air switching door 110 coaxial with the lever A120 to open the outside air suction port 106 and opening the first inside air suction port 107 is closed, and outside air is introduced into the first air passage 101.

Further, since the hook 133a of the lever B133 is disengaged from the engaging pin 127 of the lever D125, the lever D125 is rotated by the urging force of the spring 129, and the second inside / outside air switching door 111 coaxial with the lever D125 is moved. It turns to open the outside air passage 109, closes the second inside air suction port 108, and introduces outside air into the second air passage 102.

At this time, since the wind direction switch 162 is set to "DEF", the wind direction switch operation cable C1 is set to "DEF".
87 becomes the extended position, and the cam portion C14 of the cam C140
0a is disengaged from the cam receiving portion D125a of the lever D125.

For this reason, the temperature switch 163 is set to “M
Even if it is set to the “AX COOL” position, that is, the temperature switching operation cable G192 extends, the cam G145 rotates, and the cam portion 145b of the cam G regulates the position of the cam E150.
Although the cam portion E150a of the cam E150 rotates the lever F155 upward against the tension spring 149, the cam portion C140a of the cam C140 engaged with the lever F155 does not engage with the cam receiving portion D125a of the lever D125. The second inside / outside air switching door 111 opens the outside air passage 109 and closes the second inside air suction port 108.

Next, the inside / outside air introduction state will be described with reference to FIG. 4 showing a state in which the outside air / FACE / MAX COOL mode is set. The "outside air / DEF" of FIG.
/ MAX COOL mode, when the outside air introduction state is changed to the inside / outside air introduction state, the wind direction changeover switch 162 of the cab panel 160 is operated to select “DEF” other than “DEF”.
And FOOT ”,“ FOOT ”,“ FOOT and FAC ”
E "or" FACE "(set to FACE in FIG. 4).

With this change, the wind direction switch 162
Rope C187 of the wind direction switching rope 185 connected to the
Is pulled to the upper right side as shown by the arrow in FIG.
0 rotates about the engagement pin 156 of the lever F155 as the center of rotation, and the cam portion C140a of the cam C140 is moved to the lever D1.
The 25 cam receiving portions D125a are pushed up.

Accordingly, the second inside / outside air switching door 111 coaxial with the lever D125 is rotated counterclockwise as shown by the arrow to open the second inside air suction port 108 and close the outside air passage 109. Then, the inside air is introduced into the second air passage 102.

By the above operation, outside air is introduced into the first air passage 101, and inside air is introduced into the second air passage 102, thereby enabling a two-layer flow of introduction of inside and outside air.

Next, the change to the outside air introduction state will be described with reference to FIG. 5 showing a state in which the outside air / FACE / intermediate temperature range mode is set. The "outside air / FA" of FIG.
When changing from the inside / outside air introduction state in the “CE / MAX COOL mode” state to the outside air introduction state, the cab panel 16
By operating the 0 temperature changeover switch 163, the temperature is changed to the "intermediate temperature range (temperature range other than MAX COOL and MAX HOT)".

With this change, the temperature switch 163
Cable G192 of the temperature switching cable 190 connected to the
Is pulled to the upper right as shown by the arrow in FIG.
5 rotates counterclockwise about the fulcrum G146 as a rotation center, and the lever F reaches a position where it contacts the cam portion 145b of the cam G.
155 is rotated to the lower position by the tension force of the tension spring 149.

Accordingly, the engaging pin 15 of the lever F155
The cam C140 around the rotation center 6 also rotates downward, and the engagement between the cam portion C140a of the cam C140 and the cam receiving portion D125a of the lever D125 is released.

As a result, the second inside / outside air switching door 111 coaxial with the lever D125 is rotated clockwise by the force of the spring 129, as shown by the arrow, to open the outside air passage 109 and to open the second inside air passage. The suction port 108 is closed, and outside air is introduced into the second air passage 102.

Further, the change to the inside / outside air introduction state will be described with reference to FIG. 6 showing a state in which the outside air / FACE / MAX HOT mode is set. The “outside air /
When changing from the outside air introduction state in the “FACE / intermediate temperature range mode” state to the inside / outside air introduction state, the operation panel 16
0 by operating the temperature changeover switch 163 of “MAX HO”.
T ”.

With this change, the temperature switch 163
Cable G192 of the temperature switching cable 190 connected to the
6 is further pulled from the position shown in FIG. 5 as indicated by the arrow in FIG. 6, the cam G145 rotates counterclockwise about the fulcrum G146 as a rotation center, and the lever F155 is brought into contact with the cam portion 145c of the cam G145. It turns to the upper position against the tension force of the tension spring 149.

Accordingly, the engaging pin 15 of the lever F155
The cam C140 around the rotation center 6 also rotates upward, and the cam portion C140a of the cam C140 and the cam receiving portion D125a of the lever D125 engage.

As a result, the second inside / outside air switching door 111, which is coaxial with the lever D125, turns counterclockwise to open the second inside air suction port 108, close the outside air passage 109, and close the second air Inside air is introduced into the passage 102, and outside air introduced into the first air passage 101 enables a two-layer flow of introduction of inside and outside air.

As described above, according to the present embodiment, an electric motor such as a servomotor is not used as a drive source for the lever, cam and link mechanism for opening and closing the first and second inside / outside air switching doors 110 and 111. 182, 187, 1
Since the operation is performed using the 92, the load on the electric vehicle or the like can be reduced without consuming power for opening and closing the first and second inside / outside air switching doors 110 and 111.

Further, since a thick motor such as a servomotor is not mounted on the outside of the outer case, there is also an effect of making the shape smaller and more compact.

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to such embodiments.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.

[0085]

As described above, according to the first aspect of the present invention, the first and second air passages are formed in the outer case, and the outside air suction port for introducing outside air and the second air passage for introducing inside air. A second inside air suction port is provided so as to be able to communicate with the first air passage, and is provided in parallel with the outside air passage communicating with the outside air suction port and the first inside air suction port to introduce inside air. An opening is provided so as to be able to communicate with the second air passage,
A first inside / outside air switching door for closing one of the outside air suction port and the first inside air suction port when the other is open, and opening one of the outside air passage and the second inside air suction port. When the inside / outside air switching device of the vehicle air conditioner is provided with a second inside / outside air switching door that closes the other, a lever A that rotates coaxially with the first inside / outside air switching door; A lever D that rotates coaxially with the air switching door is provided, and the lever A and the lever D are connected by another lever, a cam, and a link mechanism to form a transmission mechanism. Since the inside and outside air switching device of the vehicle air conditioner connected to the changeover switch is configured, a first inside and outside air switching door that alternately opens and closes the outside air suction port and the first inside air suction port,
And a second inside / outside air switching door that alternately opens and closes the outside air passage and the second inside air suction port is provided with a lever A and a lever D that rotate coaxially, and connected therebetween by another lever, cam and link mechanism. To form a transmission mechanism, and the transmission mechanism is connected to a changeover switch in the operator's cab by an operation cable, so that the first and second inside / outside air changeover doors correspond to the mode selected by the changeover switch. Operated by an operation cable via a transmission mechanism, and does not require driving power to open and close the first and second inside / outside air switching doors, and performs desired inside / outside air switching with a compact and simple mechanism, such as an electric vehicle. However, it is possible to obtain a suitable inside / outside air switching device of a vehicle air conditioner which can be easily handled.

According to a second aspect of the present invention, in the first aspect of the present invention, the lever A is connected to a lever A which rotates coaxially with the first inside / outside air switching door.
Is provided, and the lever B is connected to an inside / outside air changeover switch in the cab with an operation cable to constitute an inside / outside air switching device of a vehicle air conditioner capable of switching between inside air introduction and outside air introduction. Therefore, the first inside / outside air switching door, which alternately opens and closes the outside air suction port for introducing outside air and the first inside air suction port for introducing inside air, connects the lever A that rotates coaxially with the first door to the same lever A. It is operated by the operation cable connected to the inside / outside air changeover switch in the cab through the lever B which has been set, and it is possible to switch to the desired inside air introduction or outside air introduction with a compact and simple mechanism without special driving power. Thus, it is possible to obtain a suitable inside / outside air switching device of a vehicle air conditioner that can be easily applied to an electric vehicle or the like.

According to a third aspect of the present invention, in the second aspect of the present invention, the hook for engaging the lever B is provided, and the second inside / outside air switching door is rotated. A lever D is provided with an engaging pin that engages with the hook portion, and when introducing inside air, the lever B is rotated by the operation of the operating cable, and the lever A and the lever D are rotated by following the operation. Activating the first and second inside / outside air switching doors, opening the first and second inside air suction ports, closing the outside air suction ports and the outside air passage, and setting the first and second Since the inside air / outside air switching device of the vehicle air conditioner is configured to allow the inside air to be taken into the air passage and stop the outside air introduction or the inside / outside air introduction, the lever in addition to the invention according to the second embodiment, B is provided with a hook, and the outside air passage and the second inside An engaging pin provided on a lever D that rotates coaxially with a second inside / outside air switching door that alternately opens and closes the suction port is engaged with the hook portion, and at the time of inside air introduction, an operation cable is operated to turn the lever B. The first and second inside / outside air switching doors are actuated by rotating the levers A and D in accordance with the movement, and the first and second inside air suction ports are opened, and the outside air is sucked. By closing the mouth and outside air passage, it is possible to take in the inside air into the first and second air passages with a simple and compact mechanism without requiring special driving power, and stop the introduction of outside air or inside / outside air. Thus, it is possible to obtain a suitable inside / outside air switching device of a vehicle air conditioner, which makes it possible to easily switch between electric vehicles and the like.

According to a fourth aspect of the present invention, in the second aspect of the present invention, an engaging hook portion is provided on the lever B, and the lever D is engaged with the hook portion. A mating pin is provided, and when introducing outside air, the lever B is turned by the operation of the operation cable, and the lever A engaged with the lever B is turned to turn the first inside / outside air switching door coaxial with the lever A. Actuating, closing the first inside air suction port and opening the outside air suction port to constitute an inside / outside air switching device of a vehicle air conditioner capable of taking in outside air into the first air passage. Therefore, in addition to the invention described in claim 2, the lever B is provided with a hook portion, and the lever D is provided with an engaging pin that engages with the hook portion. Rotate lever B, follow it, By turning the bar A to operate the first inside / outside air switching door, the first inside air suction port is closed, and the outside air suction port is opened, so that no special driving power is required, and a compact and simple operation is achieved. Thus, it is possible to obtain a suitable inside / outside air switching device of an air conditioner for a vehicle, which enables the outside air to be taken into the first air passage by a simple mechanism and can be easily applied to an electric vehicle or the like.

According to the fifth aspect of the present invention, in the first aspect of the present invention, a cam receiving portion D is provided on the lever D and a cam C is provided on the lever D when introducing outside air and inside and outside air. The lever C is configured to rotate by being engaged with a cam portion C, and the cam C is connected to a wind direction changeover switch provided in the vehicle cab for controlling a blowing direction of blown air by an operation cable, and is operable. Of the inside and outside air switching device of the vehicle air conditioner, a lever D and a cam C engaging with the lever D are provided, and connected to a wind direction switch provided in the vehicle cab for controlling a blowing direction of blowing air. By operating the cam C with the operated cable, the lever D is rotated via the cam C, and the second inside / outside air switching door or the like connected to the lever D is operated, so that special driving power is required. Without
It is possible to obtain a suitable inside / outside air switching device of a vehicle air conditioner which enables switching to stop introduction of outside air or inside / outside air with a simple and compact mechanism, and which can be easily applied to electric vehicles and the like. is there.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the first inside / outside air switching door is coaxial with the first inside / outside air switching door to rotate the first inside / outside air switching door. A lever B, which is connected to the rotating lever A and operates the lever A, is connected to an inside / outside air switching switch by an operation cable, and a cam receiving portion is attached to a lever D that rotates coaxially with the second inside / outside air switching door. A cam C is connected to a wind direction changeover switch provided in the vehicle cab by an operation cable so that the lever D is rotated by engaging with the cam portion C provided on the cam C. The cam C is engaged with the engagement pin of the lever F as a rotation center, and the lever F is operated by the cam E engaged with the lever F or the cam G constantly engaged in the approaching direction by a tension spring in the approaching direction. The position of the cam G is regulated and the temperature switching switch provided in the cab is The air conditioner for a vehicle is connected to the vehicle by an operation cable and can be operated by each of the operation cables. For each of the switches, a lever B for operating the lever A, a cam C for engaging the lever D, and a cam G for engaging the lever F
By connecting and operating each with an operation cable,
The first inside / outside air switching door and the second inside / outside air switching door are rotatable, so that it is possible to perform desired switching such as outside air introduction or inside air introduction with a compact and simple mechanism without special driving power. Thus, it is possible to obtain a suitable inside / outside air switching device of a vehicle air conditioner which can be easily applied to an electric vehicle or the like.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the lever A is connected to the lever A which rotates coaxially with the first inside / outside air switching door.
Is connected to the inside / outside air changeover switch provided in the cab of the vehicle by an operation cable, and when the inside / outside air changeover switch is set to the outside air introduction, the lever B is operated by the operation line by the inside / outside air changeover switch. Is operated, and the first inside / outside air switching door connected to the lever A is operated by the rotation of the lever A engaged with the lever B to close the first inside air suction port and open the outside air suction port. To allow the outside air to be introduced into the first air passage, provide a cam receiving portion D on a lever D that rotates coaxially with the second inside / outside air switching door, and engage with the cam portion C provided on the cam C. To rotate the lever D
Is connected to a wind direction changeover switch provided in a vehicle cab by an operation cable, and a cam C which is engaged with a lever D by a cam portion C is mounted around an engagement pin of the lever F, and the lever F is connected thereto. The operating position is regulated by the engaging cam E or the engaging cam G which is constantly urged in the approaching direction by a tension spring, and the cam G is connected to a temperature changeover switch provided in the cab by an operation cable, When the switching range of the changeover switch is set to the low temperature range or the high temperature range and the wind direction changeover switch is set to a condition other than the driver's seat front window direction side, the cam portion G ₁ of the cam G is set.
Actuates the cam E, the cam portion E of the cam E operates the lever F, and the cam portion C of the cam C engaged with the lever F with the engaging pin rotates the lever D, thereby interlocking with the lever D. Activating a second inside / outside air switching door, opening the second inside air suction port and closing the outside air passage so that inside air can be taken into the second air passage. Since the device is configured, the operation cable connects to the inside / outside air changeover switch, the lever A operates the first inside / outside air changeover door via the lever A, and the operation line connects to the wind direction changeover switch.
A cam C for operating a second inside / outside air switching door via a lever D, and a cam E,
The first inside / outside air switching door and the second inside / outside air switching door are operated by a cam G or the like that operates the second inside / outside air switching door via the lever F or the like, and special driving power is required. It is possible to obtain a suitable inside / outside air switching device of a vehicle air-conditioning system that can easily perform outside air introduction or inside air introduction or the like by a compact and simple mechanism without any difficulty, and can easily handle an electric vehicle or the like. It is a thing.

Further, according to the invention described in claim 8, in the invention described in claim 7, instead of setting the wind direction changeover switch to a setting condition other than the driver's seat front window direction side, the same is true. When the wind direction changeover switch is set to the driver's seat front window direction side, by setting a cam mechanism for releasing the engagement between the cam portion C of the cam C and the cam receiving portion D of the lever D, the temperature changeover switch becomes high temperature region, Regardless of the position in the intermediate temperature range or the low temperature range, the inside / outside air switching device of the vehicle air conditioner is configured so that the inside / outside air mode is not set when the wind direction switch is in the driver's seat front window direction side. So
When the setting of the wind direction changeover switch is changed from a direction other than the driver's seat front window direction to the driver's seat front window direction, the engagement between the cam C and the lever D is released, and the inside / outside air mode is set regardless of the setting of the temperature range. It does not require special driving power, and can be handled by a compact and simple mechanism. The device was obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a changeover switch arranged in a cab for operating an inside / outside air switching device of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an inside air intake state of an inside / outside air switching door driving mechanism in the inside / outside air switching device of the vehicle air conditioner.

FIG. 3 is an explanatory diagram showing an outside air introduction state under an outside air / DEF / MAX COOL mode selection condition in the inside / outside air switching device of the vehicle air conditioner.

FIG. 4 is an explanatory diagram showing an inside / outside air introduction state in the inside / outside air switching device of the vehicle air conditioner under outside air / FACE / MAX COOL mode selection conditions.

FIG. 5 is an explanatory diagram showing an outside air introduction state under an outside air / FACE / intermediate temperature region mode selection condition in the inside / outside air switching device of the vehicle air conditioner.

FIG. 6 is an explanatory diagram showing an inside / outside air introduction state under an outside air / FACE / MAX COOL mode selection condition in the inside / outside air switching device of the vehicle air conditioner.

FIG. 7 is a cross-sectional view of an air intake portion in a conventional inside / outside air switching device of a vehicle air conditioner.

8 is an explanatory diagram of the operation of the inside / outside air switching device in the device of FIG. 7, in which the inside / outside air switching door driving link mechanism is in a vehicle interior air intake state.

9 is an explanatory diagram of the operation of the inside / outside air switching device in the state shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 First air passage 2 Second air passage 3 Centrifugal multi-blade fan 4 Centrifugal multi-blade fan 5 Outer case 6 Outside air suction port 7 First inside air suction port 8 Second inside air suction port 9 Outside air passage DESCRIPTION OF SYMBOLS 10 1st inside / outside air switching door 11 2nd inside / outside air switching door 20 Lever A 21 Rotation axis core 22 Engagement hole 22a Play part 25 Lever D 26 Rotation axis axis 27 Engagement pin D 30 Servo motor 31 Connecting rod B 32 Support point B 33 Lever B 34 Engagement pin A 35 Engagement pin B 36 Support point C 37 Lever C 38 Engagement pin C 39 Engagement hole 39a Guide 40 Connection rod D 101 First air passage 102 Second air passage 103 Centrifugal multi-blade fan 104 Centrifugal multi-blade fan 105 Outer case 106 Outside air suction port 107 First inside air suction port 108 Second inside air suction port 109 Outside air passage 1 0 First inside / outside air switching door 111 Second inside / outside air switching door 120 Lever A 120a Link engagement hole 121 Rotation axis A 125 Lever D 125a Cam receiving part D 126 Rotation axis D 127 Engagement pin 129 Spring 132 Support point B 133 Lever B 133a Hook section 134 Engagement pin 140 Cam C 140a Cam section C 145 Cam G 145a Cam section G ₁ 145b Cam section G ₂ 145c Cam section G ₃ 146 Support point G 149 Extension spring 150 Cam E 150a Cam section E 150b Cam receiving portion E 151 Supporting point E 155 Lever F 155a Cam receiving portion F ₁ 155b Cam receiving portion F ₂ 156 Engagement pin 157 Supporting point F 160 Operating room panel 161 Inside / outside air changeover switch 162 Wind direction changeover switch 163 Temperature changeover switch 180 Inside / outside air Switching cable 181 Operation cable Holding part B 182 Operation rope B 185 Wind direction mode switching operation rope 186 Operation rope holding part C 187 Operation rope C 190 Temperature switching operation rope 191 Operation rope holding part G 192 Operation rope G

Claims (8)

[Claims] A first and a second air passages are formed in an outer case so that an outside air suction port for introducing outside air and a first inside air suction port for introducing inside air can communicate with the first air passage. And an outside air passage communicating with the outside air suction port and a second inside air suction port arranged in parallel with the first inside air suction port for introducing inside air are provided so as to be able to communicate with the second air passage. A first inside / outside air switching door that closes one of the suction port and the first inside air suction port when the other is open,
In the inside / outside air switching device of a vehicle air conditioner provided with a second inside / outside air switching door that closes one of the outside air passage and the second inside air suction port when the other is open, the first inside / outside air A lever A that rotates coaxially with the switching door and a lever D that rotates coaxially with the second inside / outside air switching door are provided, and the lever A and lever D are connected by another lever, cam and link mechanism. An internal / external air switching device for an air conditioner for a vehicle, wherein a transmission mechanism is formed by an operating cable and the transmission mechanism is connected to a changeover switch in a cab. 2. A switch B which is connected to a lever A which rotates coaxially with the first inside / outside air switching door and operates the lever A, and the lever B is operated by an operation cable to switch the inside / outside air in the cab. The inside / outside air switching device for a vehicle air conditioner according to claim 1, wherein the inside air / outside air switching device can be switched to inside air introduction or outside air introduction. 3. An engaging hook portion is provided on the lever B, and an engaging pin engaging with the hook portion is provided on a lever D for rotating the second inside / outside air switching door. The lever B is rotated by the operation of the operation cable,
Following this, the lever A and the lever D are rotated to operate the first and second inside / outside air switching doors,
Opening the second inside air suction port and closing the outside air suction port and the outside air passage, allowing inside air to be taken into the first and second air passages, and stopping outside air introduction or inside / outside air introduction. The inside / outside air switching device for a vehicle air conditioner according to claim 2, wherein 4. The lever B is provided with an engaging hook portion and the lever D is provided with an engaging pin which engages with the hook portion. When the outside air is introduced, the lever B is rotated by the operation of the operating cable. By rotating the lever A engaged with the lever B to operate the first inside / outside air switching door coaxial with the lever A, the first inside air suction port is closed and the outside air suction port is opened. The inside / outside air switching device for a vehicle air conditioner according to claim 2, wherein outside air can be taken into the first air passage. 5. A cam receiving portion D is provided on the lever D at the time of introducing outside air and inside and outside air, and the lever D is rotated by engaging with a cam portion C provided on a cam C. 2. The inside / outside air switching device for a vehicle air conditioner according to claim 1, wherein C is connected to a wind direction changeover switch provided in the vehicle cab, which controls a blowing direction of blowing air, by an operation cable, and is operable. . 6. A lever B which is connected to a lever A which rotates coaxially with the first inside / outside air switching door to rotate the first inside / outside air switching door, and switches a lever B which operates the lever A inside / outside air switching. A cam receiving portion D is provided on a lever D which is connected to the switch with an operation cable and rotates coaxially with the second inside / outside air switching door, and the lever D is rotated by engaging with a cam portion C provided on the cam C. A cam C is connected to a wind direction changeover switch provided in a vehicle cab by an operation cable so as to move, and the cam C engaged with a lever D by a cam portion C is mounted around an engagement pin of a lever F as a rotation center,
The operating position of the lever F is regulated by a cam E engaged with the lever E or a cam G engaged by being constantly urged in the approaching direction by a tension spring. The cam G is connected to a temperature switch provided in the cab by an operating cable. The inside / outside air switching device for a vehicle air conditioner according to claim 1, wherein the inside / outside air switching device of the vehicle air conditioner is operated by the operation cables. 7. A lever B, which is connected to a lever A which rotates coaxially with the first inside / outside air switching door and operates the lever A, is connected to an inside / outside air switching switch provided in a cab of the vehicle by an operation cable. When the inside / outside air changeover switch is set to the outside air introduction, the lever B is actuated by the operation cable by the inside / outside air changeover switch, and connected to the lever A by the rotation of the lever A engaged with the lever B. The first inside / outside air switching door is operated to close the first inside air suction port, and the outside air suction port is opened to allow outside air to be introduced into the first air passage. A cam receiving portion D is provided on a lever D that rotates coaxially with the door, and a cam C is provided in a vehicle cab to rotate the lever D by engaging with a cam portion C provided on a cam C. Connect with operating cable, lever D
The cam C engaged with the cam portion C is mounted around the engagement pin of the lever F as the center of rotation, and the lever F is always urged and engaged in the approach direction by the cam E or a tension spring engaged with the cam C. The operating position is regulated by a cam G, and the cam G is connected to a temperature changeover switch provided in an operator's cab with an operation cable, and when the changeover range of the temperature changeover switch is set to a low temperature range or a high temperature range, the wind direction changeover switch is in the case of setting conditions other than the driver's seat front window direction, the cam portion G ₁ of the cam G actuates the cam E, the cam portion E of the cam E actuates the lever F, the lever F
The cam portion C of the cam C engaged with the engagement pin rotates the lever D to operate the second inside / outside air switching door interlocked with the lever D, thereby opening the second inside air suction port. 2. The inside / outside air switching device for a vehicle air conditioner according to claim 1, wherein the outside air passage is closed to allow inside air to be taken into a second air passage. 8. When the wind direction changeover switch is set to the driver's seat front window direction side instead of setting the wind direction changeover switch to conditions other than the driver's seat front window direction side, the cam portion C of the cam C By setting the cam mechanism for releasing the engagement of the lever D with the cam receiving portion D, the wind direction changeover switch is set to the front of the driver's seat regardless of whether the temperature changeover switch is set to the high temperature range, the intermediate temperature range, or the low temperature range. 8. The inside / outside air switching device for a vehicle air conditioner according to claim 7, wherein the inside / outside air mode is not set when the vehicle is in a window direction side.