JPH0641243B2 - Car air conditioner controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention responds to an electric signal with respect to inside air intake and outside air intake on the upstream side of an air duct provided with an electric blower capable of changing the blowing capacity. The present invention relates to a car air conditioner control device having a selection device for selecting.

[Conventional technology]

A car air conditioner control device having such a configuration is known, and in this configuration, when the inside / outside air intake state of the inside / outside air switching means is changed from inside air intake to outside air intake or outside air intake to inside air intake. In addition, it is also possible to increase or decrease the power supplied to the electric blower for the purpose of preventing changes in the amount of airflow and noise caused by differences in ventilation resistance and the like, as disclosed in JP-A-56-39911 and JP-A-57-77011. Known from the gazette.

[Problems to be solved by the invention]

By the way, in the conventional car air conditioner control device, when a command to switch the inside / outside air switching means from the intake of small air resistance to the intake of external air of large ventilation resistance is issued, the air flow rate of the electric blower is changed almost simultaneously with this command. The microcomputer issued a command to increase. In this case, after the command for switching the inside / outside air switching means is issued until the inside / outside air switching means is actually switched from the inside air intake to the outside air intake, and after the command for increasing the blown air amount is issued. Comparing with the time until the amount of blown air actually increases, the latter is shorter. Therefore, in the conventional case, there is a problem that the air blowing amount of the electric blower is increased while the inside / outside air switching unit is moving from the inside air intake to the outside air intake.

In other words, when the inside / outside air intake state of the inside / outside air switching means is a state of taking in both inside air and outside air, in an extreme case, a state of taking in more inside air than outside air, the air blow rate of the electric blower increases. As a result, the amount of air blown is increased when the inside air is taken in with a small ventilation resistance. Due to this, there is a problem in that the amount of air blown temporarily increases and eventually noise is generated.

Therefore, in order to solve the above problems, it is an object of the present invention to provide a car air conditioner control device that does not generate noise when the inside / outside air switching means is switched from inside air intake to outside air intake.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides an electric blower whose blower capacity can be changed, an air duct in which this electric blower is arranged, and an air intake provided outside the air duct. An inside / outside air switching means for selectively switching between the inside and outside air, a first signal generating means for generating a first signal for changing the inside / outside air switching means from the inside air intake to the outside air intake, and the inside / outside Second signal generating means for generating a second signal to change the air switching means from the outside air intake to the inside air intake; and the first signal from the first signal generating means. A first control for controlling the inside / outside air switching means so that the inside / outside air intake state of the inside / outside air switching means becomes the outside air intake.
When the second signal is generated by the inside / outside air control means and the second signal generating means, the inside / outside air switching is performed so that the inside / outside air intake state of the inside / outside air switching means is set to the inside air intake. Second internal / external air control means for controlling the means, and controlling the electric blower to increase the blowing capacity of the electric blower when the first signal is generated from the first signal generating means. A first blower control means, and a second blower control means for controlling the electric blower so as to reduce the blowing capacity of the electric blower when the second signal is generated from the second signal generating means. When the first signal is generated from the first signal generating means, the inside / outside air switching means is controlled by the first inside / outside air control means from the inside air intake to the outside air intake. After moving a fixed amount The car air conditioner controller having a delay control means for causing the control by the first blower control means and the gist thereof.

In carrying out the present invention, as the electric blower, a general electric blower having a changed blowing ability for adjusting the supplied power can be applied.

As the inside / outside air switching means, a known one using an air door capable of selectively opening / closing the inside air intake and the outside air intake can be applied. Further, a publicly-known configuration may be provided in which an air door that can be opened and closed is provided at each of the intakes.

The first and second signal generating means may generate the first and second signals in response to a manual operation input, or may correspond to the temperature adjustment amount determined when the automatic temperature adjusting means is provided. It may be one that generates the first and second signals.

For the first and second inside / outside air control means, for example, a microcomputer or the like can be applied.

The first and second blower control means may control the blowing ability set in response to a manual operation input in connection with the generation of the first and second signals, or have an automatic temperature adjusting means. The blowing capacity set corresponding to the temperature adjustment amount determined in some cases may be controlled in connection with the generation of the first and second signals.

The delay control means is only required to increase the air blowing capacity of the electric blower after the inside / outside air switching means moves a predetermined amount from the inside air intake to the outside air intake when the first signal is generated. .

For example, after the first signal is generated, the inside / outside air switching means has passed a predetermined delay time required to reach a predetermined position where the inside air intake air amount is determined to be sufficiently reduced, and then the electric drive is performed. Means for increasing the blowing capacity of the blower can be applied.

Further, the inside / outside air switching means responds to reaching a predetermined position where the inside air intake air amount is sufficiently reduced, and the inside / outside air switching means is operated by the detecting means after the first signal is generated. It is also possible to apply a device provided with a prohibition device that prohibits the control of the first blower control device until it is detected that the device has reached the predetermined position.

[Action effect]

According to the above configuration, when the second signal generating means generates the second signal to switch the inside / outside air switching means from the outside air intake having a large ventilation resistance to the inside air intake having a small ventilation resistance, the second signal is generated. By the control of the inside / outside air control unit and the second blower control unit, the inside / outside air switching unit switches from the outside air intake to the inside air intake, and the blowing capacity of the electric blower is reduced. As a result, a rapid increase in the amount of blown air due to the difference in ventilation resistance is offset by an increase in the blown air capacity.

Further, when the first signal for switching the inside / outside air switching means from the inside air intake having a small ventilation resistance to the outside air intake having a large ventilation resistance is generated by the first signal generating means, the first inside / outside air control is performed. By the control of the means, the inside / outside air switching means moves from the inside air intake to the outside air intake.

Only after the inside / outside air switching means moves by a predetermined amount from the inside air intake to the outside air intake, the delay control means causes the first blower control means to perform control by the first blower control means, that is, control to increase the blowing capacity of the electric blower. .

As a result, the timing at which the blower capacity of the electric blower is increased by the first blower control means comes after the amount of air taken in is reduced by a predetermined amount, so that the blower capacity is increased by the first blower control means. However, since the ventilation resistance is increased by a predetermined amount, it is possible to prevent the problem that the amount of blown air suddenly increases and the problem that noise is generated by this.

As a result, the noise that has been temporarily generated when the inside / outside air switching means is switched from the inside air intake to the outside air intake is eliminated, so that the passenger in the vehicle compartment can enjoy a more comfortable air conditioning feeling.

〔Example〕

FIG. 2 shows the overall configuration of the car air conditioner control device according to the first embodiment. The air duct AD has an outside air intake 1 and an inside air intake 2, and an electric blower 5 capable of changing the blowing capacity. , The evaporator 6, the heater core 7, the temperature adjusting air mix damper 8, and the outlet switching doors 9 and 10 to supply temperature-controlled air to the passenger compartment 11. On the upstream side of the air duct AD, an air door 3 is arranged as an inside / outside air switching means for selecting inside air intake and outside air intake, and the air door 3 responds to the first signal or the second signal S1. The inside air intake and the outside air intake are selectively selected by the drive device 12 that operates in accordance with the above. The air duct AD is also provided with a switch 4 for detecting a predetermined position where the air door 3 opens the outside air intake 1, for example, a position where the outside air intake state is completely reached.

The drive device 12 as the inside / outside air switching means is connected so as to respond to the first signal or the second signal S1 generated from the microcomputer 20, and the electric blower 5 also responds to the control output signal from the microcomputer 20. The power supply is controlled by the driving circuit 13 that operates. The microcomputer 20 can also be configured to provide a control output signal to the drive unit 12 and other air conditioning functional elements of the drive circuit 13, and 14 represents a drive unit of the air mix damper 8.

The microcomputer 20 cooperates with some signal inputting means by executing the control program, and when the first signal is generated from the first signal generating means, the inside / outside air intake state of the inside / outside air switching means. When the second signal is generated from the first inside / outside air switching means for controlling the inside / outside air switching means so as to make the outside air intake, and the second signal generating means,
Second inside / outside air switching means for controlling the inside / outside air switching means so as to set the inside / outside air intake state of the inside / outside air switching means to the inside air intake; and the first signal from the first signal generating means. First blower control means for controlling the electric blower so as to increase the blowing capacity of the electric blower when generated, and the second signal generated from the second signal generating means, Second blower control means for controlling the electric blower so as to reduce the blowing capacity of the electric blower; and the first inside / outside air switching when the first signal is generated from the first signal generating means. By the control of the means, the inside / outside air switching means moves a predetermined amount from the inside air intake to the outside air intake, and then the delay control means for performing the control by the first blower control means is realized. In addition to the switch 4 described above, reference numeral 1 is used as the signal input means.
Included are various sensors shown at 5, 16, 17, 18, 19, and 21.

The main part of the control program of the microcomputer 20 is shown in FIG. The microcomputer 2
0 is a well-known temperature control program, which determines the temperature control amount based on the input signals from various sensors, adjusts the position of the air mix damper 8 based on it, and responds to the temperature control amount. The blower capacity of the electric blower 5 is set.

The microcomputer 20 determines in step A of the program whether to select inside air intake or outside air intake.
For the determination, it is determined whether or not the magnitude of the temperature adjustment amount exceeds a preset reference value. In step B, it is determined whether or not the result of the determination is that it is necessary to switch from the inside air intake to the outside air intake, that is, whether or not the first signal is generated. Further, it is determined in step F whether or not it is necessary to switch from the outside air intake to the inside air intake, that is, whether or not the second signal is generated.

When it is necessary to switch from the intake of the inside air to the intake of the outside air, in step C, the first signal S1 is output to the drive device 12 so that the air door 3 is actually taken into the outside air. still,
In this embodiment, step C constitutes the first inside / outside air switching means.

As a result, when the air door 3 is changing its position so as to increase the outside air intake air amount, in step D, it is repeatedly determined whether or not a predetermined outside air intake state is reached by the detection signal of the switch 4. That is, in the next step E, the time when the correction of increasing the blowing capacity is performed waits until the outside air intake state is reached. The correction of the blowing capacity by the switch E is performed by the above-described calculation of increasing the preset blowing capacity by a preset ratio, and the control output signal is output to the drive circuit 13 so that the blowing amount representing the result is obtained. Is given. In this embodiment, step D constitutes delay control means, and step E constitutes first blower control means.

On the other hand, when it is necessary to switch from the outside air intake to the inside air intake, in step G, the second signal S1 is output to the drive device 12 and the setting is performed so that the air door 3 is actually brought into the inside air intake. A control output signal is given to the drive circuit 13 so that the blown air capacity thus obtained is reduced by a set ratio and the blown air capacity is obtained. In this embodiment, step G constitutes a second inside / outside air control means and a second blower control means.

Thus, by executing the control program described above, when changing between the inside air intake and the outside air intake, the blowing capacity of the electric blower 5 is corrected by a predetermined amount, and especially when changing from the inside air intake to the outside air intake. The increase of the blowing capacity is corrected after the outside air intake air amount reaches a predetermined ratio or more with respect to the inside air intake. It should be noted that the position of the air door 3 can be detected not by the switch 4 but by a program that compares its output with a potentiometer.

FIG. 4 illustrates the second embodiment of the present invention.
In the configuration shown, the switch 4 is removed and the control program of the microcomputer 20 is modified as shown in FIG. Step H is a program process for waiting for the lapse of a predetermined time in place of the switch determination step D of FIG. In this embodiment, step H constitutes the delay control means.

[Brief description of drawings]

FIG. 1 is a conceptual configuration diagram conceptually showing the configuration of the present invention, and FIG.
FIG. 4 is a block diagram showing a first embodiment of the present invention, FIG. 3 is a flow chart showing a part of a control program of the microcomputer shown in FIG. 2, and FIG. 4 is a control applied to the second embodiment of the present invention. It is a flowchart which shows a part of program. 1 ... outside air intake, 2 ... inside air intake, 3 ... air door, 5 ... electric blower, 12 ... driving device, 13 ... driving circuit, 20 ... microcomputer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Honda, 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd. (56) Reference JP-A-56-39911 (JP, A) JP-A-57 -126710 (JP, A)

Claims (1)

[Claims] 1. An electric blower capable of changing its blowing capacity, an air duct in which this electric blower is arranged, and an air duct provided upstream of this air duct to selectively switch between intake of inside air and intake of outside air. An inside / outside air switching means; a first signal generating means for generating a first signal to change the inside / outside air switching means from the inside air intake to the outside air intake; Second signal generating means for generating a second signal indicating a change from the outside air intake to the inside air intake; and the inside / outside air when the first signal is generated from the first signal generating means. A first for controlling the inside / outside air switching means so that the inside / outside air intake state of the switching means becomes the outside air intake
When the second signal is generated from the inside / outside air control unit and the second signal generating unit, the inside / outside air switching is performed so that the inside / outside air intake state of the inside / outside air switching unit is set to the inside air intake. Second controlling means
Inside / outside air control means, and first blower control means for controlling the electric blower so as to increase the blowing capacity of the electric blower when the first signal is generated from the first signal generating means. A second blower control means for controlling the electric blower so as to reduce the blowing capacity of the electric blower when the second signal is generated from the second signal generating means; and the first signal. When the first signal is generated from the generating means, the inside / outside air switching means moves by a predetermined amount from the inside air intake to the outside air intake under the control of the first inside / outside air control means, and then, A car air conditioner control device comprising: a delay control means for controlling by a first blower control means.