JPS5815791A - Operation control device of fan - Google Patents

Abstract

PURPOSE:To make it possible to set various medium speed operations with two variable speed terminals by energizing a fan motor such that energizing time for the high and low speed terminals of the fan motor partly lap over each other. CONSTITUTION:When signals are respectively outputted with the period of TB1 (L level)+TB2(H level) from a 19th terminal, an elctric current is sent to a low speed terminal with triac Q3-ON during TB1 to cause a gentle wind, and a fan is operated with a low speed terminal +alpha with both triacs Q1 and Q2-ON during overlapped TA1 and TB2 and it is subjected to a strong operation with triac Q1-ON during TA2. During these operations, since an electric current is instantaneously sent in either case within the range of several cycles out of power frequency, motor load and fan inertia are mixed together and motor FM rotates with a medium speed. This medium speed can be selected by controlling the degree of overlapping of TA1 and TA2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation control device for various blowers such as electric fans.

As shown in FIG. 1, an operation control device has been proposed that controls the rotational speed of a blower by intermittent energization to a motor that rotates a fan within a range of several cycles of the power supply frequency. In this case, the noise generated by the motor (gurgling noise) can be reduced by starting energization to the motor at a certain phase angle that adapts to the characteristics of the motor and motor load, but we assume that this device is applied to an electric fan. Then, as shown in FIG. 2, when the elevation angle θ of the electric fan is increased, a rumbling sound may still occur.

This occurs when the angle of elevation is large and the motor is held obliquely, as shown in FIG. In other words, the rotor shaft 1' of the motor normally has an axial play of about IWn, and when the motor is energized, the stator 2' and the rotor 3'
The rotor 3' rotates at the position where the electromagnetic centers of the motors are aligned (the position indicated by the dotted line in Figure 3). Therefore, if the intermittent control speed is changed within a range of several cycles of the power supply frequency as shown in Figure 1, the electromagnetic center position of the rotor 3' when energized will change. The rotor 3' moved downward and hit the stopper, causing noise, especially when the power was switched off from the energized state. However, this caused a rumbling sound.

The object of the present invention is to control the rotational speed of a fan motor by intermittent control of the energization time to the fan motor without producing the above-mentioned rumbling noise. The motor is energized so that the energizing times partially overlap, and by controlling the overlapping energizing time, the speed of rotation is controlled, and an electromagnetic force is always generated in the motor to keep the rotor fixed at the electromagnetic center position, thereby eliminating the rumbling noise. This is to prevent the occurrence of

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings, using an electric fan using a microcomputer as an embodiment.

Fig. 4 is an electric circuit diagram of the electric fan according to the present invention, Figs. 5 and 6 are waveform diagrams in the electric circuit, and Fig. 7 is an electric circuit showing another embodiment of the fan motor portion of the electric circuit. It is a diagram.

First, in the electric circuit diagram shown in FIG. 4, the control circuit includes a power supply circuit section 1, a motor drive circuit section 2, a waveform shaping circuit section 3, a reset signal generation circuit section 4, a first operation circuit section 5, and a second operation circuit section. It has a circuit section 6, a display circuit section 7, a notification circuit section 8, and a microcomputer IC3, and is configured to be controlled by one microcomputer IC3 that is integrated into a single chip and written in a ROM system. Computer IC3 has 28 pins and 1 kilobyte RO.
It has a capacity of M and is equipped with circuits (functions) for processing signals from various circuits.

In the power supply circuit section 1, TR is a lance connected between both terminals of an alternating current power supply AC via a current fuse FU, and a varistor NR for overvoltage prevention and a capacitor C7 for noise prevention are connected between its input terminals. Connected. Q5 is a transistor whose collector is connected to the output terminal of the autotransformer TR via diodes D1 and D2, and whose base is connected to one terminal of the AC power supply AC via a Zener diode ZDI. A resistor R6 is connected between the emitter and the base, and a smoothing electrolytic capacitor C1 is connected between the emitter and the base via a Zener diode ZDI, thereby stabilizing the voltage across the capacitor CI.

C2 is a smoothing electrolytic capacitor connected between the collector and base of transistor Q5 via a Zener diode ZDI, and C6 is a high frequency pass capacitor connected between both ends of capacitor CI.

The motor drive circuit section 2 is connected between both terminals of the AC power supply AC via a current fuse FU, and the fan motor FM has a triac connected between each terminal for high speed and low speed and the AC power supply AC. Q1 and Q3 are inserted, and a triac Q4 is inserted between the oscillating motor SM and the AC power supply AC. The oscillating motor SM is a drive source for a oscillating mechanism that causes the head of an electric fan having a fan and the like rotated by the fan motor FM to perform a oscillating motion.

The waveform shaping circuit section 3 generates a clock signal used within the microcomputer ICa.

In the waveform shaping circuit section 3, Q6 is a transistor whose base is connected to the output terminal of the autotransformer TR via a resistor R8, and whose emitter is connected to the + side of the capacitor C1, that is, H level (Ov
) side, and the collector is connected to one side of the capacitor C1, that is, the L level (-10V) side, through the resistor R2, and is also connected to the clock signal input terminal, that is, the No. 25 terminal of the microcomputer I (l). D3 is a diode connected between the base and emitter of transistor Q6,
C4 is a high frequency pass capacitor connected between the emitter and collector of the transistor Q6. The transistor Q6 has a diode D between its base and emitter.
3 is inserted, the - half-wave of the alternating current taken out from the autotransformer TR via the resistor R8 is applied to the base, and while this - half-wave is applied, it is in the ON state, and the - half-wave is applied to the base. It is in the OFF state when no half wave is applied. Therefore, the collector voltage of the transistor Q6 is the voltage obtained by dividing the voltage across the capacitor CI by the internal resistance of the transistor Q6 and the resistor R2 when the transistor Q6 is ON (actually, the internal resistance of the transistor Q6 is the voltage of the resistor R2). Since it is extremely small compared to the resistance value and can be ignored, it becomes a value close to ten voltages of the capacitor C1, and conversely, when the transistor Q6 is OFF, it becomes one voltage of the capacitor CI. That is, a square wave pulse synchronized with the power supply frequency is generated at the collector of the transistor Q6, and this square wave pulse is supplied to the 25th terminal of the microcomputer IC3.

The reset signal generating circuit section 4 generates a reset signal for the microcomputer IC 8 when the power is turned on.

In the reset signal generation circuit section 4, Q7 is a transistor whose emitter is connected to one side of the capacitor C1 as well as to one side of the capacitor C1, and whose base is a Zener diode ZD2, and after inserting a resistor R4, a resistor R is connected to one side of the capacitor C3 and to one side of the capacitor C1.
7 to the positive side of the capacitor CI, and the collector thereof is connected to the positive side of the capacitor C1 through the resistor R3, and is also connected to the reset input terminal of the microcomputer I (1), that is, the 26th terminal.

R1 is a resistor connected between the base and emitter of the transistor Q7, and D4 is a diode connected in parallel with the resistor R7 to facilitate discharging the charge in the capacitor C3 when the power is cut off. When power is applied to the reset signal generating circuit section 4, the voltage across the capacitor CI starts charging the capacitor C3 via the resistor R7, and the charging of the capacitor C3 progresses, causing the Zener diode ZD2 to exceed the specified value. When a voltage (a voltage higher than the Zener voltage) is applied, the resistors R7, R4 and the Zener diode ZD2. l- Current flows through the base of transistor Q7 and resistor R1, and a voltage is applied between the emitter and base of transistor Q7 by the voltage drop caused by resistor R1, turning transistor Q7 ON, and transistor Q7
Since the Zener voltage of the Zener diode ZD2 is lower than the voltage across the capacitor CI, after the capacitor C3 is charged to a level higher than the Zener voltage, current continues to flow through the resistor R1, so that the ON state continues, and when the power is cut off, the ON state continues. Transistor Q7 is turned off. Note that the transistor Q7 is in an OFF state from when power is first applied until the capacitor C3 is charged to the Zener voltage of the Zener diode ZD2. By operating in this way, the collector voltage of transistor Q7 becomes the voltage of capacitor C1 when transistor Q7 is OFF,
Also, when transistor Q7 is ON, the voltage of capacitor C1 is divided by resistor R3 and the internal resistance of transistor Q7. Because there is
When the power is turned on, a reset node signal is supplied to the 26th terminal of the microcomputer IC3.

In the first operation circuit section 5, the air volume switching switches of "strong", "medium", "breeze" and "off" are set to switch SW3 to SW6 on the H level side of the power supply circuit l and Nos. 5 to 2 of the microcomputer IC8. At 08:00, the corresponding signal is input to the microcomputer IC3. The frequency selection switch SW9 switches between 50Hz and 60Hz, and is connected between the H level of the power supply circuit section 1 and the No. 6 terminal of the microcomputer IC3.
When using 0 Hz, it is OFF when using 160 Hz, so that the clock signal in the microcomputer 1 always operates accurately at the predetermined frequency regardless of the power frequency. 2 of l
Each resistor of the resistor array RA2 is connected between the terminals No. 6 to 6 and the L level side of the power supply circuit section l. In addition, switches SW3 to SW6 are automatic key switches that are turned ON only when they are pressed, and switch SW9 is turned ON.
N.

This is a switch that can be locked in either the OFF or OFF state.

In the second operating circuit section 6, a timer release switch S
WI, timer setting switch SW2, swinging switch SW
7 and intermittent operation switch SW8 are connected to the H level side of the power supply circuit section 1 and the numbers 23 and 24 of the microcomputer IC3.
They are connected between terminals 22 and 21, respectively, and when turned on, input the accompanying signal to the microcomputer C3. Each resistor of the resistor array RAI is connected between the 21st to 24th terminals of the microcomputer IC8 and the L level side of the power supply circuit l. In addition, the above switches SWI, SW
2. SW7 and SW8 are momentary key switches that are turned on only when pressed.

The display circuit section 7 includes six display elements that display different time zones, for example, four red light emitting diodes LED4 to LED7.
and a time display section having two green light emitting diodes LED8 and LED9. In the display circuit section 7, the input terminals 2 to 6 of the transistor array ICI are connected to the 12 to 8 terminals of the microcomputer IC8, and the output terminals 9 to 13 are connected to the light emitting diodes L.
It is connected to the H level side of the power supply circuit section 1 via ED9 to LED5.

In addition, the transistor array IC2 has input terminals 2 to 6 or microcomputer I (19 to 16, 1 of I).
At the same time, each output terminal of No. 11 to 13 is connected to the gate of each triac Q3 to Q1, and the output terminal of No. 10 is connected to the gate of triac Q4 via resistor R5. Furthermore, the No. 9 output terminal is connected to the H level side of the power supply circuit section 1 via the light emitting diode LED4. transistor array ICI,
Both No. 7 terminals of IC2 are connected to the L level side of the power supply circuit section l. In addition, the light emitting diodes LED4 to LED9 are used to display the set time limit and remaining time of the timer.
ED4 is from 100 minutes OI seconds to 120 minutes, LED5 is from 80 minutes OI seconds to 100 minutes, LED6 is 60 minutes 01
From seconds to 80 minutes, LED 7 from 40 minutes 01 seconds to 60 minutes, LED 8 from 20 minutes 01 seconds to 40 minutes, LED
9 displays each time period from 01 seconds to 20 minutes. In the figure, R11 to R19 represent current limiting resistors.

In the notification circuit section 8, the emitter of the transistor Q8 is connected to the L level side of the power supply circuit section 1 via a resistor R9, and a resistor RIO is connected between the base and collector. The piezoelectric buzzer BZ has an A electrode connected to the microcomputer IC3 through the diode D5 together with the collector of the transistor Q8.
B is connected to the buzzer signal output terminal, that is, terminal No. 20, and
The electrode is connected to the emitter of transistor Q8, and the C electrode, which is a divided electrode, is connected to the base of transistor Q8.

Therefore, when ten voltages are applied to the electrode side of the piezoelectric buzzer BZ and one voltage is applied to the side of the B electrode side, the piezoelectric buzzer BZ performs self-oscillation, and together with the buzzer case (resonator) not shown, generates sound. . The diode D5 protects the microcomputer IC3 from the voltage generated when a shock is applied to the piezoelectric buzzer element for some reason.

Intermediate frequency transformer iFT is microcomputer ICa
Connect terminal 1 to the internal clock pulse generation circuit (not shown),
It is externally connected via terminal No. 28, and generates a 400 KHz synchronization pulse from the clock pulse generation circuit. Note that C5 indicates a high frequency pass capacitor.

The No. 7 terminal of the microcomputer IC8 is an input terminal for testing the timer operation, and is normally connected to the L level side of the power supply circuit section 1 via the resistor of the resistor array RA2. They are connected to the H level side of section 1, respectively. Further, the microcomputer IC3 has its 14th terminal connected to the H level side of the power supply circuit section 1, and its 27th terminal connected to the same L level side.

Therefore, the microcomputer IC3 is a CPU.

It is equipped with RAM, ROM, Ilo, etc., and is equipped with a 400 KHz synchronization signal generation circuit, and is controlled according to a program written in the ROM based on this synchronization signal, and mainly includes the following means. That is, the microcomputer IC8 switches the switches SWI to SW9.
and means for determining the operation of switches SW3 to SW5.
A means for outputting a fan motor control signal based on the input signal associated with N, and a step-up (every 20 minutes) of the set time limit according to the input time of the time limit setting signal when the switch SW2 is turned on, and time measurement when the switch SW2 is turned off. A timer means for starting the operation, a means for calculating the remaining time of the timer means and generating a signal for operating the fan motor at a low speed for a certain period of time (40 minutes before the end of the set time period); Means for outputting a time display signal based on the set time limit and remaining time; means for generating a signal for canceling the set time limit of the timer means based on the input signal accompanying the ON of the switch S/Wl; and the ON of the switch SW7. means for outputting an oscillating motor control signal based on an input signal accompanying switch SW8; means for generating a fan motor intermittent control signal based on an input signal accompanying ON of switch SW8;
It is provided with means for outputting a buzzer signal when the set time limit of the timer means is stepped up when I to SW8 are turned on.

Next, the operation of the electric fan including the control circuit as described above will be explained.

〔Normal operation〕

First, by connecting a plug to a power source and applying an arithmetic operation, a reset signal is inputted from the reset signal generation circuit section 4 to the microcomputer IC 3 via the terminal No. 26,
All means within the microcomputer IC3 are reset to their initial states.

Next, select your desired air volume and operate the corresponding switch. Now, when strong wind operation is selected and switch SW3 is pressed, microcomputer Ic3 outputs a buzzer signal of approximately 0.11+5 from terminal 20 as a signal is input through terminal 5, and outputs a buzzer signal of approximately 0.11+5 to the piezoelectric buzzer. Ten voltages are applied to the octupole side of BZ to vibrate the piezoelectric buzzer BZ and generate a sound to confirm that the switch SW3 has been turned on, while determining the input signal accompanying the ON of the switch SW3 and A corresponding output signal is generated at the 19th terminal and inputted to the 2nd terminal of the transistor array IC2.

Then, conduction occurs between the 13th terminal and the 7th terminal of the transistor array IC2, and the 13th terminal and the 7th terminal of the transistor array IC2 are connected from the H level side of the capacitor c1 to the first electrode of the triac Q1, the gate, the resistor R11, and the 13th terminal and the 7th terminal of the transistor array IC2. Thereafter, a current flows to the L level side of the capacitor CI, thereby making the triac Q1 conductive, and the fan motor FM receives 100 V of the AC power supply AC through the high speed terminal, and operates at high speed. This high-speed operation of the fan motor FM causes the electric fan to be in a strong wind operation state.

Similarly, when the switch SW5 is turned on, the piezoelectric buzzer BZ makes a sound confirming the operation, the triac Q3 is made conductive, and the fan motor FM is operated at a low speed to cause the fan to operate with a slight breeze.

Next, when the switch SW4 is turned on, outputs are generated from the 17th and 19th terminals of the microcomputer lc8 from time t1 as shown in FIG. In other words, the H signal from terminal 19 as shown in Fig. 5(I) continues, and the triac Q1 conducts, energizing the high-speed terminal of fan motor FM, and the signal from terminal 17 as shown in Fig. 5(I). The H signal is intermittently output at a cycle of TI (H level) + T2 (L level), and triac Q3 is ON during T1, and T2
The low speed terminal of the fan motor FM is energized intermittently. And triac Q1 is ON
, When triac Q3 is OFF, try to drive at high speed (maximum speed) Measurement example: Rotation speed 60Hz 100V
1300 rpm), when triac Q1 is ON and triac Q3 is ON, the high speed terminal and low speed terminal of fan motor FM are short-circuited and energized, the current flowing through the winding increases slightly, and the low speed terminal α (Measurement example: 60Hz.

85 Orpm at 100V, 60Hz when operating only with low speed terminal [breeze], 57 Orpm at 100V, so α;
, 850-570 rpm). However, since the time T (-71+T 2 ) is an instant within several cycles of the power supply frequency, the motor load is mixed with the fan inertia, and the fan motor FM rotates at a medium speed. This medium speed of rotation can be selected by controlling the time T1.

Furthermore, the microcomputer IC3 has a frequency of 400KHz using an intermediate frequency transformer iFT, and a waveform shaping circuit section 3.
Since there is a power supply frequency clock, the phase at the start of T, the time of TI, T2, etc. can be adjusted.

Also, when the switch SW4 is turned on, the microcomputer C3's 1
When the H signal is intermittently output from the 7th terminal and the 19th terminal, that is, the TAI signal is output from the 17th terminal as shown in Fig. 6 (I).
(H level) + TA2 (L level) cycle, 19 again
When a signal is output from the terminal No. 6 at the cycle of TBI (L level) + TB2 (H level) as shown in FIG. Breeze operation (measurement example: 60Hz, 10
57 Orpm at 0V), and while TAI and TB2 overlap, triac Q1 and Q3 are both ON and low speed terminal +
α (Measurement example: 60Hz, 85Orpm at l OOV)
During Ta2, triac Q1 is turned on and operated strongly (side illumination: 60Hz, IQOV: 130Orpm). Since these operations are instantaneous within several cycles of the power supply frequency, the motor load is mixed with the inertia of the fan, and the fan motor FM rotates at a medium speed. This medium rotation speed can be selected by controlling the degree of overlap between TAI and TB2.

Strictly speaking, the output of microcomputer IC3 is H.
Even if it becomes more L, the triac will continue to conduct until near the next zero cross, so in reality TAI, Ta21
Various checks are required when determining TBI and TB2. Further, it is better to set TA1+TA2=TB1+TB2.

Therefore, if you want to change the air volume while the fan motor FM is operating, by turning on the switch corresponding to the desired air volume, the fan motor will be switched to the speed corresponding to that switch, allowing you to obtain the desired air volume. can. Then, any operating state of fan motor FM is set to O of switch SW6.
End with N. That is, microcomputer IC
3 generates a buzzer signal at terminal 20 when a signal accompanying the ON of switch SW6 is input through terminal 2, a piezoelectric buzzer BZ emits a sound confirming the operation, and determines whether switch SW6 is ON. to stop the generation of the fan motor control signal currently being output.

If two or more switches SWI to SW8 are turned on at the same time, the microcomputer IC8 determines that two or more switches are turned on at the same time, generates a buzzer signal at terminal 20, and makes a sound using the piezoelectric buzzer BZ. This occurs intermittently to warn of incorrect operation and to prompt correct operation.

[Timer control operation]

The switch SW2 is used to set the time limit of a timer means, and it becomes effective only when the fan motor FM is in operation.

Now, if the switch SW2 is turned ON while the fan motor FM is operating at high speed, the microcomputer IC
3 receives the time limit setting signal in conjunction with the ON of SW2 SW2 through terminal 24, judges this time limit setting signal, and starts calculating the input time of the time limit setting signal using the clock signal. Set the time limit to 20 minutes and
An output is generated at the No. 8 terminal, inputted to the No. 6 terminal of the transistor array ICI, and conduction is established between the No. 9 and No. 7 terminals to light the green light emitting diode LED9, and this lighting causes a 20-minute display to be performed.

Then, when the ON time of the switch SW2, that is, the input time of the time limit setting signal exceeds 0.7 seconds, the microcomputer IC3 sets the time limit of the timer to 40 seconds based on the elapsed time.
At the same time, the output of the 8th terminal is eliminated and the output is generated at the 9th terminal, and the transistor array 1'
By connecting the 10th terminal and the 7th terminal of the CI, the green light emitting diode LED8 is turned on in place of the LED9, and a 40 minute display is made.

Furthermore, if the ON state of switch SW2 continues and the input time of the time limit setting signal is extended, the microcomputer IC
8 sets the timer to 60 minutes every 0.7 seconds, 8
Step up sequentially from 0 minutes to 120 minutes, and sequentially switch the terminals that generate output to terminals 10 to 13.
The light emitting diodes that light up along with this are also LED7~LE.
By sequentially switching to D4, a display corresponding to the time limit of the timer is performed. In this way, the time limit of the timer is set to a maximum of 120 minutes.

Now, when the red light emitting diode LED6 lights up and the switch SW2 is turned off, the time limit of the timer is set to 80 minutes, and the microcomputer IC8, which has determined that the switch SW2 is turned off, starts a timekeeping operation. Then, initially, the air volume operation set by the air volume changeover switches SW3 to SW5, that is, the high-speed operation of the fan motor FM, continues as it is, and the microcomputer C3 calculates the elapsed time using the clock signal and sets the timer. When the remaining time reaches 60 minutes, the microcomputer IC3 becomes 11 minutes.
The output of the terminal No. 10 is extinguished to turn off the red light emitting diode LED6, and at the same time, an output is generated to the terminal No. 10 to turn on the red light emitting diode LED7, and the display is switched to 60 minutes. Furthermore, when the remaining time of the timer reaches 40 minutes, the microcomputer-c3 eliminates the output from the 10th terminal, generates an output from the 9th terminal, and displays a green light emitting diode that shows a different display mode than before. 40 by lighting LED8
At the same time, an output is generated at terminal No. 17 to conduct the triac Q3, and the air volume operation set by the air volume changeover switch, that is, the flow motor FM is switched from high speed operation to low speed operation. When the remaining time of the timer reaches 20 minutes, the microcomputer I (I) generates an output at terminal 8 and switches on the green light emitting diode LED9. When the time is 0 minutes, that is, when the set time period ends, the microcomputer IC3 turns off the output from terminals 8 and 17, turns off the green light emitting diode LED9, and turns off the fan motor FM.
will be stopped.

After setting the time limit of the timer, if you want to extend the time limit of the timer, turn on the switch SW2 again. Then, the microcomputer IC3 switches the switch SW2 to O.
N is determined, and the time limit of the timer is stepped up based on the current time limit.

On the other hand, if you want to shorten the time limit of the timer, turn on the switch SWI and input 2 to the microcomputer IC8.
After the timer output in the microcomputer IC3 is temporarily extinguished by inputting a timer release signal through the No. 3 terminal, the time limit of the timer is set again using the switch SW2.

In addition, the microcomputer IC3 has a switch SWI,
2 based on the accompanying input signal when SW2 is ONL.
A buzzer signal is generated at terminal 0 and the piezoelectric buzzer BZ makes an operation confirmation sound, and when stepping up the time limit of the timer, a buzzer signal is generated at terminal 20 and the sound of the piezoelectric buzzer BZ causes the timer to set the time limit. You will be asked to confirm the switching.

[Swinging operation]

The switch SW7 is used to stop the head vibration operation, and becomes effective only when the fan motor FM is in operation.

Now, when the switch SW7 is turned ON, a signal is input to the microcomputer IC3 through the 22nd terminal, and the microcomputer IC8 determines whether the switch SW7 is ON and generates an output at the 16th terminal to conduct the triac Q4. I will let you do it.

Due to this conduction, the oscillating motor SM is supplied with the AC power supply A.
10QV of C is applied, and the oscillating mechanism starts operating by operating the oscillating motor SM, causing the head of the fan to perform a oscillating operation.

When the switch SW7 is turned on again during the head vibration operation, the microcomputer IC3 judges the signal inputted through the 22nd terminal and eliminates the output from the 16th terminal. Then, the triac Q4 becomes non-conductive, and the oscillating motor SM is de-energized and stops, thereby stopping the oscillating operation of the oscillating head.

By repeatedly operating the switch SW7 in this manner, the neck vibration operation can be stopped. The microcomputer IC3 generates a buzzer signal at the 20th terminal based on the input signal when the switch SW7 is turned on, and the piezoelectric buzzer BZ makes a sound to confirm the operation.

[Intermittent operation]

The switch SW8 performs intermittent operation of the fan motor FM, and becomes effective only when the fan motor FM is in operation.

Now, if the switch SW8 is turned on while the fan motor FM is operating at high speed, the microcomputer IC
3 determines the signal input through the 21st terminal and stores the ROM
A control signal is output to terminal 19 based on a program stored in advance, and this control signal turns triac Q1 ON and OFF to intermittent high-speed operation of fan motor FM, and causes light emitting diode LED1 to blink. Become. In other words, by intermittent high-speed operation of the fan motor FM, the resulting wind has a variation close to that of natural wind, and a sufficiently cool feeling can be obtained.Also, by blinking the light emitting diode LED I, intermittent operation at high speed is possible. It is possible to display that the

Also, in such an intermittent operation state, switch S is turned on again.
When W8 is turned on, microcomputer IC3 becomes 21.
The signal input through terminal No. 19 is judged and a continuous control signal is output to terminal No. 19, and the fan motor FM
will return to continuous high-speed operation. By repeatedly operating the switch SW8 in this way, it is possible to select between intermittent operation and continuous operation.

Similarly, when the switch SW8 is turned on when the fan motor FM is operating at a medium speed, the fan motor FM becomes an intermittent operation at a medium speed, and when the switch SW8 is turned on when the fan motor FM is operating at a low speed, the fan motor FM becomes an intermittent operation at a low speed. It becomes driving.

In addition, the microcomputer IC3 is connected to the O of switch SW8.
A buzzer signal is generated at the 20th terminal based on the input signal associated with N, and the operation confirmation sound is emitted by the piezoelectric boob q-BZ ξ
It is something.

Therefore, the above-mentioned timer control, oscillation, and intermittent operations can be used together. Also, by turning on the switch SW6, the microcomputer Ic3 inputs a reset signal through the No. 2 terminal, and the microcomputer IC8
This is to erase all ways of appearing and reset to the initial state.

Note that by inputting an H level signal to the microcomputer IC8 through the terminal No. 7 of the microcomputer IC8, that is, the input terminal for the timer operation test,
For example, this is to shorten one minute to one second so that the timer operation details can be checked.

In the description of the above embodiment, the triac Q1 is connected to the high speed terminal of the fan motor FM in FIG. 4, and the triac Q3 is connected to the low speed terminal, but one of the auxiliary windings of the fan motor FM is In addition to the method in which the speed change terminal is pulled out from the
There is a method to change speed by connecting to M.

In method 7 of Fig. 7, when there is an output from a microcomputer as shown in Fig. 5, triac Q3' is continuously conductive, triac Q1 is ON only during T1, and T2
OFF during 7 days. Here, if the reactor Z has a higher impedance than the fan motor FM, even if the triac Q3' is turned on, the voltage applied to the fan motor FM is low, only a small current flows, and the motor hardly rotates ( However, the electric fan should have enough electromagnetic force to prevent rumbling noise even when the angle of elevation θ is large.

When triac Ql is ON, fan motor FM
When the power supply voltage is applied to the
Since the time of TI + T2 is a very short time, the rotation speed can be freely controlled by using a fan motor with the rotation speed mixed by inertia, and since the reactor Z is large, the triac Q8' becomes a continuous conductive force.

- If necessary, turn on the switching element (TRIAC Q1') at a phase angle that adapts the phase at the ON start of T1 to the characteristics of the motor and motor load.
It may also be possible to prevent a sudden current from flowing at the time of start.

As described above, the present invention energizes the high-speed terminals and low-speed terminals of the fan motor so that their energizing times partially overlap, and also changes speed by controlling the overlapping energizing times. Because of this, there are 2 gear shifting terminals.
Various medium-speed operations can be set individually, and since electromagnetic force is always applied to the fan motor, for example, even if the angle of elevation of an electric fan becomes large, no rumbling noise will be generated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of 0N-OFF of the speed change method by ON/OFF control in the operation control device of the fan, Fig. 2 is an explanatory diagram of the elevation angle of the fan, and Fig. 3 is an explanation of the internal structure of the fan shown in Fig. 2. 4 is an electric circuit diagram of a fan that is an embodiment of the present invention, FIGS. 5 and 6 are waveform diagrams in the same electric circuit, and FIG. 7 is another embodiment of the fan motor portion of the same electric circuit. FIG. 3 is an electrical circuit diagram showing an example. 1: Power supply circuit section, 2: Motor drive circuit section, 5: First operation circuit section, 6: Second operation circuit section, 7: Display circuit section, I
C8: Microcomputer, FM: Fan motor. Agent Patent Attorney Aihiko Fukushi

Claims (1)

[Claims] 1. Operation control of a blower by energizing high-speed terminals and low-speed terminals of a fan motor so that their energizing times partially overlap, and changing the speed by controlling the overlapping energizing times. Device. 2. An operation control device for a blower according to claim 1, wherein current is continuously supplied to one terminal, and the supply of current to the other terminal is controlled intermittently within a range of several cycles of the power supply frequency. 3. Current supply to the high-speed terminal and the low-speed terminal is controlled intermittently in cycles within several cycles of the power supply frequency, and the energization times partially overlap, Claim 1
The operation control device for the blower described in Section 1.