JPS6212042B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is used in an automotive air conditioner that cools, heats, humidifies, etc. the interior of an automobile, and is used to selectively introduce air to be conditioned from outside and outside the interior of the vehicle. This invention relates to an inside/outside air switching device.

[Conventional technology]

Conventional devices of this type have one inlet for taking in outside air and one inlet for taking in inside air, and have one inside/outside air switching damper so that the user can select between outside air and inside air. The structure was such that when outside air was taken in, the inside air inlet was closed, and when inside air was taken in, the outside air inlet was closed.

By the way, this conventional system has one intake port for inside air and one outside air intake, so inside air is introduced to improve the air conditioning capacity, and at the same time outside air is taken in to ventilate the cabin. If necessary, the inside/outside air switching damper is set to a neutral position between the outside air inlet and the inside air inlet, so that outside air and inside air are introduced at the same time.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional device, when the opening area of the inside air inlet and outside air inlet is increased in order to increase the air volume, the inside/outside air switching damper inevitably becomes larger. There is a problem in that the rotation space for the damper must be enlarged, leading to an increase in the size of the inside/outside air switching box.

In view of the above, the present invention provides an air conditioner for an automobile that can increase air volume without increasing the size of the inside/outside air switching box, and can satisfactorily set outside air introduction mode, inside air introduction mode, and inside and outside air simultaneous introduction mode. The purpose is to provide a ki switching device.

[Means for solving problems]

In order to achieve the above object, the present invention includes: two inside air inlets, a first and a second, that introduce air into the vehicle interior; two outside air inlets, the first and second, that introduce air outside the vehicle; a first damper that switches between the first inside air inlet and the first outside air inlet; a second damper that switches between the second inside air inlet and the second outside air inlet; and these first and second dampers. an operating mechanism that performs switching control of the first and second inside air inlets by switching the first and second dampers, and a state in which the first and second inside air inlets are opened by switching the first and second dampers, and a state in which the first outside air inlet and the second inside air A technical means is adopted in which a state in which both the air inlet and the air inlet are open and a state in which the first and second inside air inlets are opened can be set.

[Effect]

According to the above technical means, the shy air introduction mode;
In both the outside air introduction mode and the inside and outside air simultaneous introduction mode, air is introduced through the two introduction ports, reducing ventilation resistance and increasing the air volume. Moreover, since the two inside air inlets and the two outside air inlets are selectively opened and closed by two inside/outside air switching dampers, the rotation space for each damper is relatively small.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

Fig. 1 is a cross-sectional view showing the inside/outside air switching box 1 attached to the lower surface of the vehicle dash panel 10. The first for intake,
It has second inside air inlets 2 and 3, and first and second outside air inlets 4 and 5 for taking in outside air that are open on the top surface. Reference numerals 6 and 7 denote first and second dampers provided in the inside/outside air switching box 1, which switch between inside and outside air by coming into contact with the peripheral edge of either the inside air inlet 2, 3 or the outside air inlet 4, 5. It is something. In addition, the mounting part of the inside/outside air switching box 1 and the dash panel 10 is attached to the batskin 8.
It is sealed by. Further, an outside air guide duct 9 is formed on the vehicle side, and outside air is guided from this duct 9 to the first and second outside air introduction ports 4 and 5. The inside of the inside/outside air switching box 1 is connected to a fan case 20, and the air introduced into the inside/outside air switching box 1 is forced to flow toward the air conditioner case 21 by the fan inside the fan case 20. The air is conditioned by air conditioners such as a cooler, a heater, and a humidifier disposed inside the air conditioner case 21.

FIG. 2 is a diagram showing the operating mechanism of the first and second dampers 6, 7. 11 is an operation link for the first damper 6, and this link 11 is connected to the rotation center shaft 12 of the first damper 6 so as to rotate together with the first damper 6, and the rotation center of the plate 13. An arcuate groove 11a formed in an arc shape centered on 13a, and a straight groove 1 continuous to this arcuate groove 11a.
1b, and both grooves 11a, 11b are adapted to engage with a first pin 13b attached to the plate 13.

14 and 15 are operation links for the second damper 7, and the first link 14 is designed to rotate around a fulcrum 16 provided at an intermediate position, and has an arcuate groove 14a and a straight groove at one end thereof. 14b are formed continuously, and both these grooves 14a, 14b
is adapted to engage with a second pin 13c attached to the plate 13. Here, the arcuate groove 14a is formed to have an arcuate shape centered on the rotation center 13a of the plate 13 when the link 14 is operated to the one-dot chain line position 14'.
Further, a straight groove 14 is provided on the other end side of the first link 14.
c is formed, and the pin 15a of the second link 15 engages with this straight groove 14c. The second link 15 is connected to the rotation center shaft 17 of the second damper 7 and rotates together with the second damper 7. Therefore, the rotation of the plate 13 is caused through these links 14 and 15. and is transmitted to the second damper 7.

The plate 13 is rotatably pinned to the inside/outside air switching box 1 at a rotation center 13a, and is configured to rotate in response to the amount of movement of an operating wire 18 connected to an end portion 13d of the plate 13. Although not shown, the operating wire 18 is adapted to move in response to displacement of an inside/outside air operating lever of an air conditioning control panel disposed at the front of the vehicle interior.

As described above, in this embodiment, the operating mechanism for controlling the switching of the first and second dampers 6 and 7 is constituted by the link mechanism (11, 13, 14, 15, etc.) shown in FIG. .

Next, the operation of this embodiment in the above configuration will be explained. First, we will discuss the case where only outside air needs to be introduced when the automobile air conditioner is performing heating operation or when ventilating the air inside the vehicle.
In this case, the operating wire 18 is moved to the position shown by the solid line in FIG _. Second
The rear end position of the arcuate groove 14a of the damper operation link 14
Move to B ₁ . As a result, the first damper 6 and the second damper 7 close the first and second inside air inlets 2 and 3 and open the first and second outside air inlets 4 and 5, respectively.

Next, in order to introduce inside air and outside air in a mixed state, move the operating wire 18 to rotate the plate 13 clockwise in FIG. respectively in Figure 2.
Move it to the positions indicated by A ₂ and B ₂ . In this operation, the first pin 13b moves within the arcuate groove 11a of the first damper operation link 11, so the rotation of the plate 13 is not transmitted to the first damper 6, so the first damper 6 Keep mouth 2 closed. On the other hand, since the second pin 13c is located within the straight groove 14b of the second damper operating link 14, the rotation of the plate 13 is transmitted to the second damper operating links 14 and 15.
5 move to the positions shown by the dashed-dotted lines 14' and 15' in FIG. 3 is opened and the second outside air introduction port 5 is closed.

Therefore, in this state, outside air from the first outside air intake port 4 and inside air from the second inside air intake port 3 are simultaneously introduced into the inside/outside air switching box 1, and outside air is brought into the vehicle interior for ventilation. This is effective when there is a need to simultaneously take in air that has already been air-conditioned in the vehicle in order to improve the cooling and heating capabilities of the vehicle interior.

Also, in the above-described simultaneous inside and outside air introduction mode, the first damper 6 abuts the peripheral edge of the first inside air inlet 2, and the second damper 7 abuts the peripheral edge of the second outside air inlet 5. , first, second
Since both dampers 6 and 7 can be held securely,
Problems such as when the first and second dampers 6, 7 vibrate and generate abnormal noises do not occur. In conventional systems, where one internal/external air switching damper is set at the neutral position and internal/external air is taken in at the same time, the internal/external air switching damper is located in the airflow, making its retention unstable, making it difficult to drive on rough roads. Damper vibration is likely to occur due to such factors, but this example can also satisfactorily eliminate such problems.

If the automobile air conditioner is in cooling operation and it is necessary to increase its cooling capacity, and it is necessary to introduce only the air inside the vehicle that has already been cooled to some extent, the operation wire 18 can be moved. Then move the plate 13 further clockwise in FIG.
Move to the positions indicated by A ₃ and B ₃ . In addition, position B ₃
is the same position as position _A1 .

By this operation, the first pin 13b engages with the linear groove 11b of the first damper operating link 11, transmits the rotation of the plate 13 to the first damper operating link 11, and moves the link 11 to the position shown in FIG. It is moved to the position indicated by the dotted chain line 11'. Therefore, the first damper 6 also rotates around the central axis of rotation 12 to the position shown by the two-dot chain line 6' in FIG. 2, opening the first inside air inlet 2 and closing the first outside air inlet 4. On the other hand, since the arcuate groove 14a of the second damper operation links 14 and 15 is located on the circumference centered on the rotation center 13a of the plate 13, the second pin 13c is connected to the arcuate groove 14a.
therefore, the second damper operating link 1
4 and 15 maintain the positions indicated by the dashed-dotted lines 14' and 15' in FIG. 2, and the second damper 7 still closes the second outside air inlet 5 and opens the second inside air inlet 3. There is.

Therefore, in this state, both the first and second outside air introduction ports 4 and 5 are closed, and only inside air is introduced into the outside air switching box 1 through the first and second inside air introduction ports 2 and 3. Become.

In the above embodiment, the amount of movement of the operating wire 18 for rotating the plate 13 is controlled by the operating lever, but if necessary, mechanical drive means such as a diaphragm actuator or a step motor may be used. Of course, the amount of movement of the operating wire 18 may be controlled using an electric driving means such as the above.

In addition, by connecting the above-mentioned mechanical drive means or electric drive means to the first and second dampers 6 and 7, and operating the first and second dampers 6 and 7 by the drive means, the inside and outside air can be Switching may also be performed.

In addition, the first outside air inlet 4 of the inside and outside air switching box 1
The partition portion 19 between the first outside air inlet 5 and the second outside air inlet 5 may be removed. In this case, there is only one outside air inlet in appearance, but the space covered by the first damper 6 and the second
Since the space covered by the damper 7 exists separately, the apparatus of the present invention assumes that the first outside air inlet 4 and the second outside air inlet 5 exist even in such a case. In addition, in order to obtain a good internal air introduction state when this partition part 19 is removed, the first and second dampers 6 and 7 are
It is preferable that an elastic member is disposed at the tip of the dampers 6 and 7 so that the dampers 6 and 7 come into contact with each other.

〔Effect of the invention〕

As described above, according to the device of the present invention, the two inside air inlets 2, 3 and the two outside air inlets 4, 5 are switched open and closed by the two dampers 6, 7, so that only inside air is introduced; It has the excellent effect of being able to very effectively switch between introducing a mixture of inside air and outside air and introducing only outside air.

Moreover, since the device of the present invention is provided with two each of the inside air inlet and the outside air inlet, the opening area of the outside air inlet can be increased to increase the air volume. Second
By using the two dampers 6 and 7, the rotation space of the dampers can be set small, and the effect is that the inside/outside air switching box can be relatively small.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the device of the present invention installed in a vehicle, and FIG. 2 is an explanatory view showing a link mechanism for driving a damper. 2...First inside air introduction port, 3...Second inside air introduction port, 4...First outside air introduction port, 5...Second outside air introduction port, 6...First damper, 7...Second damper, 1
1, 14, 15...link, 13...plate.

Claims (1)

[Scope of Claims] 1. Two inside air inlets, a first and a second, that introduce air inside the vehicle; two outside air inlets, a first and second, that introduce air outside the vehicle; and the first inside air introduction. a first damper for switching between the first outside air inlet and the second outside air inlet; a second damper for switching between the second inside air inlet and the second outside air inlet; and a second damper for switching between the first and second dampers. The operating mechanism is configured to open the first and second inside air inlets by switching the first and second dampers, and to open the first and second inside air inlets by switching the first and second dampers. An inside/outside air switching device for an automobile air conditioner, characterized in that it is configured to be able to set a state in which both of the outside air inlets are open, and a state in which the first and second outside air inlets are open. 2. The internal/external air switching device for an automobile air conditioner according to claim 1, wherein the operating mechanism is constituted by a link mechanism that interlocks switching of the first and second dampers. .