JPS63214220A - Control apparatus of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner with a power control function.

2. Description of the Related Art Conventionally, a control device for this type of vacuum cleaner has been constructed as shown in FIG.

In FIG. 2, when the secondary side all-hand switch 2 of the pulse transformer 1 is short-circuited, current flows through the resistor 3, the voltage across the resistor 3 rises, the capacitor 4 is charged, and the transistor 5 becomes conductive. When the transistor 5 is turned on, the collector potential at the point A increases the count of the counter 8 every time the DC power is applied. The bidirectional thyristor [0] connected in series with the power supply circuit of the electric blower 9 is phase-controlled via a phase control circuit 11 based on the count value of the counter 8.

According to this conventional configuration, the counter 8 has a count value of “0”.
The count value increases step by step every time the hand switch 2 is operated, and when the count value reaches the maximum, when the hand switch 2 is further operated, the count value of the counter 8 reaches 0.
This is a ring-type counter, and each time the hand switch 2 is pressed, the power of the electric blower 9 increases step by step and is turned off at a certain point, which is repeated.

Problems to be Solved by the Invention In the conventional configuration shown in FIG. 2, the power control direction is only in one upward direction, and if you want to make a weak suction force, press the hand switch 2 many times and turn the counter 8. There was the inconvenience of having to go around it all the time.

The present invention can be expected to operate stably over a long period of time, and moreover, the power control of the electric blower can be controlled in either the upward or downward direction! The purpose of the present invention is to provide a control device for a vacuum cleaner.

Means for Solving the Problems The vacuum cleaner control device of the present invention includes a bidirectional thyristor connected in series to the power supply circuit of the electric blower.
The configuration is configured to perform phase control according to the count value of the counter, and determines the combination of logic levels of the terminal voltages of the first and second capacitors connected to the charging circuit to cause the counter to count up, count down, and reset. , a logic circuit for instructing whether to prohibit counting is provided, a first photocoupler is provided whose output is conductive to discharge the first capacitor when a current of positive polarity flows through the input, and a first photocoupler is provided that discharges the first capacitor when a current of positive polarity flows through the input; A second photocoupler whose output conducts when current flows to discharge the second capacitor is provided, and the second photocoupler is interposed between the inputs of the first and second photocouplers connected in parallel and the AC power source. The device is characterized in that it is equipped with a switching circuit that switches the energization state between positive polarity, negative polarity, off, and alternating current.

Operation According to this configuration, by selecting the type of voltage to be applied to the first and second photocouplers in the switching circuit,
The terminal voltage of the second capacitor is controlled separately, and the counter is up-counted, down-counted, and
Reset, switch to count prohibition face, and operate the switching circuit to control the power of the electric blower.

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

Components having the same functions as those in FIG. 2 showing the conventional example are designated by the same reference numerals and their explanations will be omitted.

12 counts up and counts down to counter 8,
A logic circuit that instructs whether to reset or prohibit counting, and on its input side are first and second capacitors 18, which are charged by a DC power supply 17 via resistors 13, 14, 15, and 16'.
19 are connected. Reference numerals 20 and 21 denote first and second photocouplers, each of which has a light emitting diode on its input side and a phototransistor on its output side.The output side of the first photocoupler 20 is connected to a first capacitor 18 via a resistor 14.
The output side of the second photocoupler 21 is connected in parallel to a second capacitor 19 via a resistor 16. The input sides of the first and second photocouplers 20.21 are connected in antiparallel to each other. The input side of the first and second photocouplers (to) 20.21 connected in parallel is connected to the secondary winding 24 of the transformer 23 via the switching circuit 22 arranged at the tip of the suction hose. There is.

The switching circuit 22 is connected to one end d of the first hand switch 25.
is connected to one end of the secondary winding 24, and the first hand switch 2
5 is connected to the common contact f of the second hand switch 26, the first contact gk of the second hand switch 26 is connected to the common contact of the third hand switch 27, and the third hand switch 26 is connected to the common contact f of the second hand switch 26. A first rectifier diode 28 is connected between the first contact i and the second contact j of the switch 27, with the second contact J being the anode.
A second rectifier diode 29 is connected between the first contact i of the third hand switch 27 and the second contact of the second hand switch 26, with the side facing the second contact being the cathode. and the input side is connected in parallel between the first contact i of the third hand switch 27 and the other end of the secondary winding.
, second photocouplers 20 and 21 are connected.

Next, the configuration of the logic circuit 12 will be explained based on its operation. When the first hand switch 25 gold holder, second and third hand switches 26 and 27 are placed in the state shown in FIG.
A transformer 23 is connected to the input of the second photocoupler 20.21.
The alternating current voltage generated in the secondary winding 24 of
capacitors 18 and 19 are both discharged, and the first and second capacitors 18 and 19 are discharged.
The terminal voltages of capacitors 18 and 19 are both ゝゝL L
Become L level. In this way, the first and second capacitors 1
When the terminal voltages of 8 and 19 both reach the ゝゝL // level, the logic circuit 12 inhibits the counting of the counter 8 so that the count value of the counter 8 does not change.

The voltage is rectified to have only positive polarity, and of the light emitting diodes of both the first and second photocouplers 20 and 21, only the light emitting diode of the first photocoupler 2o lights up, and the first photocoupler 20 The phototransistor becomes conductive, discharging the first capacitor 18, and the terminal voltage of the first capacitor 18 becomes "L" level and the terminal voltage of the second capacitor 19 becomes "YH" level. in this case,
The logic circuit 12 puts the counting state a of the counter 8 in an up-counting state, counts the clock signal generated at a constant repetition period, and when the counted value increases, only the third hand switch 27 is activated at an appropriate time. When the counter 8 is returned to the first and second photocouple labels, the count value of the counter 8 is held at the value at that time.

The voltage is rectified to have only negative polarity, and of the light emitting diodes of both the first and second photocouplers 20 and 21, only the light emitting diode of the second photocoupler 21 lights up, and the second photocoupler 20 lights up. The phototransistor becomes conductive, discharging the second capacitor 19, and the terminal voltage of the first capacitor 18 becomes "H" level and the terminal voltage of the second capacitor 19 becomes "L" level. in this case,
The logic circuit 12 sets the counting state of the counter 8 to a ladder run counting state, counts the clock signal that is generated at a constant repetition period, and when the counted value decreases, only the second hand switch 26 is activated at an appropriate time. When the voltage is returned to 1, the AC voltage is again applied to the inputs of the first and second photocouplers 20.21, and the terminal voltages of the first and second capacitors 18.19 are both at the "L" level. , the count value of the counter 8 is held at the value at that time.

When the count value of the counter 8 is changed in this way, the electric blower 9 is connected to the phase control circuit 11 and the bidirectional thyristor 1.
0, the power is controlled at a phase according to the count value of the counter 8 at any given time.

When the cleaning is finished and the first hand switch 25 is turned off,
No voltage is supplied to the inputs of the first and second photocouplers 20.21, and the first and second capacitors 18.19
The terminal voltages of both become "H" level.

In this case, the logic circuit 12 resets the count value of the counter 8 and stops the operation of the electric blower 9.

In this way, it is possible to select between counting up and counting down the counter 8 by operating the second and third hand switches 26 and 27, so it is possible to reduce the operating power of the electric blower without increasing it to the maximum. Can be done.

As mentioned above, the first to third hand switches 25 and 26
.

Although it is possible to select up-counting or down-counting of the counter 8 by operating 27, the electric cord connecting the main body of the vacuum cleaner and the hand part is only two wires, cords 30 and 31, so the suction hose 2-wire code 30,
31 can be used as is.

Effects of the Invention As described above, according to the present invention, the combination of logic levels of the terminal voltages of the first and second capacitors connected to the charging circuit is determined, and the phase control counter is up-counted, down-counted, and reset. , a logic circuit for instructing whether to prohibit counting is provided, a first photocoupler is provided whose output is conductive to discharge the first capacitor when a current of positive polarity flows through the input, and a first photocoupler is provided that discharges the first capacitor when a current of positive polarity flows through the input; A second photocoupler whose output conducts when current flows to discharge the second capacitor is provided, and the second photocoupler is interposed between the inputs of the first and second photocouplers connected in parallel and the AC power source. Since a switching circuit is provided for switching the energization state between positive polarity, negative polarity, off, and alternating current, the switching circuit can be operated to switch between up-counting and down-counting of the counter. The voltage applied to the input side of the second photocoupler is switched between alternating current, positive polarity, and negative polarity to change the counting state of the counter, so the switching circuit provided at the hand and the main body of the vacuum cleaner are connected. It only needs to be connected with two electrical cords, no separate wiring is required, and the configuration is simple.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a control device for a vacuum cleaner according to the present invention, and FIG. 2 is a block diagram of a conventional control device for a vacuum cleaner. 9... Electric blower, 10... Bidirectional thyristor,
11... Phase control circuit, 12... Logic circuit, 18.
19...first and second capacitors, 20.21...
First and second photo J couplers, 22... switching circuit, 23... transformer, 2
5, 26.27...First, second, and third hand switches, 28.29...First and second rectifier diodes. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A bidirectional thyristor connected in series to the power supply circuit of the electric blower is configured to be phase-controlled according to the count value of the counter, and the terminal voltage of the first and second capacitors connected to the charging circuit is controlled. determines the combination of logic levels and instructs the counter to count up, count down,
A logic circuit for instructing whether to reset or prohibit counting is provided, a first photocoupler is provided whose output becomes conductive to discharge the first capacitor when a positive polarity current flows through the input, and a first photocoupler is provided that discharges the first capacitor when a positive polarity current flows through the input; A second photocoupler is provided, the output of which becomes conductive to discharge the second capacitor when a current of This control device for a vacuum cleaner is provided with a switching circuit for switching the energization state between positive polarity, negative polarity, off, and alternating current, and the switching circuit is operated to control the counter and power control the electric blower.