JPH0737854B2 - Air conditioner control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control device for an air conditioner.

[Prior Art] FIG. 4 is a block diagram of a conventional fan motor control device disclosed in, for example, Japanese Patent Application Laid-Open No. 63-11091 (hereinafter referred to as “first conventional example”), and FIG. 5 is an SSR6 of FIG. Of the operation of
FIG. 6 is a flow chart of a subroutine for controlling the fan motor of this conventional example. In FIG. 4, 4 is a power source, 5 is a fan motor, 6 is an SSR (solid state relay), 14 is an air conditioner control unit, 15 is an operation unit, 16 is a zero point control device, and 17 is a delay device. Is.

Next, the operation of this conventional example will be described with reference to FIGS. In FIG. 1 of the drawings, when the wind speed is set by the operation unit 15, the control unit 14 outputs a signal a for turning the SSR 6 on and off (see FIG. 5 (A)). This signal a
Is converted into a signal b which shifts from the off state to the on state by the zero point control device 16 when the phase of the AC waveform is 0 degree or 180 degrees as shown in FIG. The signal c is delayed by 17 by 1/4 of the AC cycle (see FIG. 5 (C)). This signal is applied to the photodiode of SSR6 to turn SSR6 on and off, and at the moment when the phase angle of the AC waveform becomes 90 degrees or 270 degrees, fan motor 5 has a waveform as shown in FIG. 5 (D). The rotation speed of the fan motor 5 is controlled by applying an AC voltage and changing the duty of the ON state and the OFF state of the SSR6. Therefore, in the above control method, 90 degrees or
When the SSR6 is turned on at 270 degrees, the instantaneous maximum value of the AC voltage is applied to the fan motor 5, so that the generated torque is large and constant, which makes it possible to suppress the vibration of the fan motor itself.

In the above-mentioned conventional example, the signal from the controller 14 is applied to the fan motor 5 by using the zero-point control device 16 and the delay device 17 to apply an alternating current that turns on and off at a phase of 90 degrees or 270 degrees. Alternatively, this may be controlled by a program of a microcomputer.

Next, the operation control of this conventional example will be described mainly with reference to FIG.

FIG. 6 is a flowchart of a fan motor control subroutine in the control program of the microcomputer.

In FIG. 6, when the processing mode of the microcomputer branches to a subroutine, first, step 50
Then, it is determined whether the signal for controlling the fan motor 5 (FIG. 4) is turned on or off. Then, depending on the determination result, the process proceeds to step 51 or 56 to determine whether the current signal is on or off, and when it is not necessary to invert the output, this subroutine is finished as it is. However, when it is necessary to change the output, the process proceeds to step 52 or 57, the input signal indicating the phase is read, and it is determined whether the phase is 0 degree or 180 degree in step 53 or 58, respectively. If the phase is not 0 degree or 180 degrees, the process returns to step 52 or 57 to read the input signal indicating the phase again, and if it is 0 degree or 180 degree, it is 1/4 at step 54 or 59.
The time of the cycle is delayed, and the output signal of the fan motor control is inverted in step 55 or 60. Then, this subroutine is finished.

Next, Japanese Utility Model Publication No. 55-102608 (hereinafter referred to as the second conventional example)
Discloses a fan control device for blower of an automobile,
The vehicle speed is detected by the speed detection means, and the rotation speed of the blower fan is controlled by this detection output. The rotation speed of the fan is automatically reduced to reduce the noise of the fan. Is. Further, the speed detecting means is composed of a position detecting device for detecting the position of the pointer provided on the speed meter in a stepwise manner.

[Problems to be Solved by the Invention]

As described above, in the conventional example, since the fan motor control device is configured as described above, the rotation speed of the fan motor increases due to the voltage fluctuation, and the vibration is transmitted to the wall or the like to generate the vibration sound. There was a problem.

The present invention has been made to solve the above-mentioned problems of the conventional example. When the rotation speed of the fan motor reaches a rotation speed (upper limit rotation speed) at which vibration noise due to vibration of a wall or the like is generated, the fan is rotated. An object of the present invention is to obtain an air conditioner control device that reduces the number of rotations of a motor to prevent generation of vibration noise of the wall or the like.

[Means for Solving the Problems]

Therefore, in the present invention, the remote control means for changing the speed control of the fan motor of the air conditioner by remote control, the signal receiving means for receiving the signal of the remote control means, and the rotation speed of the fan motor in stages. And a rotation speed detection means for detecting a preset upper limit rotation speed of the fan motor. When the upper limit rotation speed is detected, the rotation speed of the fan motor is set at a low stage speed. By the control device of the air conditioner characterized by operating
It is intended to achieve the above object.

[Action]

The air conditioner control device according to the present invention allows the speed control of the fan motor to be remotely controlled by the remote control means.
The signal receiving means receives the signal from the remote control means, the control means controls the rotation speed of the fan motor, and the rotation speed detecting means detects the upper limit rotation speed of the fan motor.

〔Example〕

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

Drawing FIG. 1 is an electric circuit diagram of a control device for an air conditioner which is an embodiment of the present invention, FIG. 2 is a view showing a method of applying a voltage to SSR6 of FIG. 1, and FIG. 3 is a drawing of this embodiment. It is a flow chart which controls operation.

In FIG. 1, reference numeral A is a remote operation means for changing the speed adjustment (speed adjustment) of a fan motor of an air conditioner by a remote operation, and a signal for operating / stopping and changing the fan motor speed is sent to the air conditioner. It is composed of a remote controller 2 for delivery. B is a signal receiving means, which is composed of a receiver 3 that receives a signal from the remote controller 2. C is a control means for controlling the rotation speed of the fan motor 5, and is a solid-state relay (hereinafter SS) for controlling the speed of the microcomputer 1 (hereinafter referred to as a microcomputer) and the fan motor.
R)). Reference numeral D denotes a rotation speed detecting means including a rotation speed detecting element (hall element) 11 for detecting the rotation speed of the fan motor 5, particularly the upper limit rotation speed. Further, 4 is an AC power supply, 8 is a diode for full-wave rectification, there is a transistor 9 for capturing the full-wave rectified waveform in the microcomputer 1, and 10 is a resistor for pulling up the transistor 9. . 12 is a transistor and 13 is a resistor.

Next, the drive of the fan motor and the rotation speed control, which are the operations of this embodiment, will be described centering on the control means C with reference to FIGS.

First, driving of the fan motor will be described with reference to FIG.

FIG. 2 shows a method of applying a voltage to the SSR for driving the fan motor.

In FIG. 2 of the drawings, the waveform (i) is the waveform after full-wave rectification by the diode 8, and the rectangular wave of the waveform (ii) is input to the microcomputer 1 by waveform shaping by the transistor 9. The microcomputer 1 outputs a pulse having a width X of the waveform (iii) after a time t from the fall of the waveform (ii) from H to L. By applying the pulse of waveform (iii) to SSR6, the fan motor rotates. Width X of waveform (iii)
If there is no pulse of, the fan motor will stop.

Next, the rotation speed control of the fan motor in the operation of this embodiment will be described with reference to FIG.

In FIG. 3 of the drawing, in step 10, the receiver 3 determines whether or not the operation ON signal from the remote controller 2 is received. operation
When ON is received, the process proceeds to step 11 and it is determined "whether the fan speed set last time is the same as the fan speed set this time." If not, go to step 12 and set "This time the set fan speed is 4".
Or? " (Fan motor speed is 4>3>2>
In the order of 1> stop, the rotation speed increases toward the left). If the fan speed is 4, go to step 13 and read ROM (rea
Store 4 in Accumulator A in the area d only memory). If the set fan speed of this time is not 4 in step 12, proceed to step 14 "The set fan speed of this time is 3
Is judged, and if it is 3, at step 15, 3 is stored in the accumulator A. If the set fan speed this time is not 3 in step 14, proceed to step 16 to determine "is this set fan speed 2?" If it is 2, step 17
Store 2 in Accumulator A. If the set fan speed this time is not 2 in step 16, the process proceeds to step 18 and 1 is stored in the accumulator A.

After that, the routine proceeds to step 19, and a flag indicating whether the rotation speed of the fan motor detected by the rotation speed detecting element (hall element) 11 which is the rotation speed detecting means D exceeds the upper limit set value is detected. , Go to step 20 and leave the contents of the accumulator as it is. If the flag is 1, the process proceeds to step 21 and 1 is subtracted from the data of the accumulator A, and the result is stored in the accumulator A.

After that, in step 22, SSR6 with the contents of accumulator A
Turn on.

Next, in step 23, it is determined whether or not the rotation speed of the fan motor exceeds the upper limit rotation speed setting value (a value at which a wall or the like vibrates when this rotation speed is exceeded). The "upper limit engine speed over flag" is set to 1.
If not, the "upper limit engine speed over flag" is set to 0 in step 25. After passing through step 24, proceed to step 26 and "set the N value in the rotation speed down timer". In this case, the timer time is the time when rotating at the rotation speed that is one speed lower, and this timer is released. Then,
The control is performed to return the rotation speed to the original rotation speed.

After that, in step 27, the rotation speed down timer is decreased by one. As a result, it is determined in step 28 whether the rotation speed down timer has reached 0, and if not 0, step
At 29, set the "revolution speed down flag" to 1. If the rotation speed down timer is 0, the "rotation speed down flag" is set to 0 in step 30. Further, in step 11, if "the previously set fan speed and the current set fan speed are the same", the process proceeds to step 31, and it is determined whether or not the "revolution speed down flag" is reversed from 1 to 0. If it is reversed, the process proceeds to step 12, and if it is not reversed, the process proceeds to step 19. Also, step 10
If the received data of the remote controller 2 is OFF, the process proceeds to step 32 to step 35, the power to the SSR6 is set to 0 (stop), the upper limit rotation speed over flag is set to 0, and the rotation speed down timer is set to 0. The rotation speed down flag is set to 0.

As described above, according to this embodiment, the fan motor control device has the rotation speed detection means D for detecting the rotation speed of the fan motor 5, and the rotation speed of the fan motor 5 is equal to the set value. When it exceeds the limit, the number of rotations can be reduced by one speed, which prevents transmission of vibrations to walls and the like.

The condition for returning the speed control of the fan motor 5 that has decreased by one speed to the original speed control is when the n-minute timer is released or when the speed control of the fan is changed by the remote controller 2.

〔The invention's effect〕

As described above, according to the present invention, when the rotation speed of the fan motor reaches the rotation speed (upper limit rotation speed) at which vibration noise due to vibration of the wall or the like is generated, the rotation speed of the fan motor is decreased to set the wall There is an effect that it is possible to obtain an air conditioner control device that prevents the generation of vibration noise.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a control device for an air conditioner according to an embodiment of the present invention, FIG. 2 is a diagram showing a method of applying a voltage to SSR6 in FIG. 1, and FIG. 3 is an operation of this embodiment. FIG. 4 is a block diagram of a conventional fan motor control device, FIG. 5 is a diagram showing the operation of the SSR6 of FIG. 4, and FIG. 6 is a flowchart of the fan motor control subroutine of this conventional example. Is. A: remote control means B: signal reception means C: control means D: rotational speed detection means 1 ... microcomputer 2 ... remote control device 3 ... receiver 4 ... AC power supply 5 ... fan motor 6 ... SSR 8 ... Diode 11 ... Rotation speed detection element (Hall element) The same symbols indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A remote control means for changing the speed control of a fan motor of an air conditioner by remote control, a signal receiving means for receiving a signal from the remote control means, and a stepwise control of the rotation speed of the fan motor. A control means and a rotation speed detection means for detecting a preset upper limit rotation speed of the fan motor, and when the upper limit rotation speed is detected, the rotation speed of the fan motor is operated at a low stage speed. A control device for an air conditioner.