JPS6188788A - Vacuum cleaner phase control device - Google Patents

Abstract

PURPOSE:To commonly use 50/60Hz by phase-controlling a control rectifier so that the power consumption of a motor driven blower approaches a target power consumption. CONSTITUTION:A motor driven blower 101 is connected in series with a bidirectional thyristor 102, and connected between AC power sources. The outputs of a voltage detector 104 and a current detector 103 are input to a calculator 105, which generates a voltage proportional to the power consumption of the blower 101 by (effective voltage)X(effective current). A comparator 106 inputs a deviation signal between the voltage and a voltage proportional to the target power consumption given from an input setter 107 to a phase controller 108. Thus, the inputs substantially coincide at 50Hz, 60Hz, and thus a phase controller common at 50/60Hz is composed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a phase control device for a vacuum cleaner used in general households.

Conventional example (1 structure and its problems) Conventionally, this type of phase control device is constructed as shown in FIG. 4. In FIG.
is the main bidirectional thyristor, connected in series between the alternating current power supplies. Reference numeral 3 denotes a hand switch section at the tip of the Bose, which is composed of a series circuit of a switch 4 and a variable resistor 5. The circuit of the hand switch section 3 is connected to one end of current limiting resistors 6 and 7, and the other end of the resistor 7 is connected to a capacitor 8, so that the charging speed of the capacitor 8 is determined according to the value of the variable resistor 5 of the hand switch section 3. It is configured so that it can be changed.

Here, when the voltage across the terminals of the capacitor 8 reaches the breakover voltage of the element 9, the charge of the capacitor 8 flows into the gate terminal of the high-sensitivity bidirectional thyristor 10 via the trigger element 9, resulting in high-sensitivity bidirectional thyristor 10. The thyristor 10 turns on and the main bidirectional thyristor 2 is turned on via the resistor 11.
When the blower 1 is turned on, power is supplied to the blower 1 and it starts rotating.

According to the above circuit configuration, since the charging time of the capacitor 8 can be varied by varying the variable resistor 5 of the hand switch section 3, the trigger timing of the highly sensitive bidirectional thyristor 10 can be controlled, and the phase of t1 removal Control becomes possible. However, with this configuration, the power supply frequency of 50Hz
Currently, there is a problem that the power consumption of the electric blower 11 is different depending on the frequency and 60 Hz, making it difficult to share the same power.

FIG. 5 shows this relationship. If we take the resistance value of the variable resistor 5 of the hand switch unit 3 on the horizontal axis and the power consumption of the electric PA machine 1 on the vertical axis, we get characteristic 12 at 60Hz and characteristic 1 at 50H2.
It can be seen that 3 is different. For this reason, in the past, the variable resistor 5 was set separately for 5ol-1z and 60H2, so even if it was for the same -Ia type vacuum cleaner, 5ol-1z and 60H2 were set separately.
There are two types, 0Hz and 60Hz, which not only have poor serviceability but also pose a bottleneck in production.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a phase control device that can be used commonly by 50H2 and 601-12.

Structure of the Invention The phase control device for a vacuum cleaner of the present invention includes a control rectifier connected in series with the power supply circuit of an electric blower, and controls the control rectifier to control the load current to the electric blower and the electric blower l! It is configured to perform phase control so that the power consumption of the electric blower calculated from the effective voltage across both ends of I11 approaches the target power consumption set in the input setting section, so that it can be used for both 50Hz and 60Hz. It is characterized by what it did.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a block diagram of the phase control device.

In FIG. 1, an electric blower If1101 is connected in series with a bidirectional thyristor 102 and connected between an AC power source. Further, a current detection section 103 is inserted on the AC line to detect the effective current of the electric blower 101. 104 is a voltage detection unit that detects the effective voltage between both terminals of the electric blower 101. The outputs of the voltage detection section 104 and the current detection section 103 are calculated by an arithmetic circuit 105. The arithmetic circuit 105 generates a voltage proportional to the power consumption of the electric blower 101 using (effective voltage) x (effective current). This voltage is compared with a voltage proportional to the target power consumption given from the input setting section 107 by the comparator 106,
The output of the comparator 106 is input to the phase control section 108 and controlled via the bidirectional thyristor 102 so that the output voltage of the arithmetic circuit 105 approaches the output voltage of the input setting ali 107.

According to the above configuration, the power consumption of the electric blower 173101 is detected as is, and the power consumption is controlled to the power value set in the input setting section 107, so that the inputs are almost the same at 5oHz and 60Hz. Therefore, 50/60H
A z-shared phase 1iIJ fil device can be constructed.

FIG. 2 shows input characteristics when the phase control device of FIG. 1 is used. In the figure, the horizontal axis indicates the input setting section 107.
If we take the power consumption value of the electric blower 101 on the vertical axis, then
It can be seen that the 50 Hz characteristic 109 and the 60 Hz characteristic 110 almost match. Characteristic 111 is an input characteristic curve of 60)1z when a conventional phase control device is used. In this way, phase ill III can be performed while matching the input characteristics of 50/60 Hz.

FIG. 3 shows a specific example of FIG. The voltage detection section 104 includes a diode 112, a resistor 113F3, and a capacitor 11.
4, the change in the effective voltage across the electric transmission 8i1 machine 101 is detected as a change in the voltage across the capacitor 114, and is input to the arithmetic circuit 105. Resistor 115 is a discharge resistance of capacitor 114. The current detection section 103 includes a pickup coil 116. Since the effective voltage ■ of the electric blower 101 and the detection signal of the load current 1 are input to the arithmetic circuit 105, an output proportional to the power consumption of the electric blower 101 is produced as an output, and one input of the comparator 106 in the next stage is output. input to the terminal. Further, the output voltage of the variable resistor 117 as the input setting section 107 is applied as a reference voltage to the other input terminal of the comparator 106. The output of the comparator 106 is input to the setting circuit 118 from the phase control section 108 .

The trigger setting circuit 118 includes a capacitor 119 and a resistor 1.
It sets the charging speed of the charging circuit composed of the bidirectional thyristor 10 via the trigger element 121.
The trigger setting circuit 118 operates so that the input voltages of the comparator 106 are equal, and the variable resistor 117 controls the electric transmission J.
! The power consumption of the I machine 101 can be freely and variably set.

As described in the detailed description of the invention, the phase control device of the present invention includes a control rectifier connected in series with the power supply circuit of an electric blower, and this control rectifier is connected to the load current to the electric blower. Since the configuration is such that phase control is performed so that the power consumption of the electric blower I'll played based on the effective voltage between both ends of the electric blower approaches the target power consumption set in the input setting section, the power consumption is 50/60.
It is now possible to completely match the Hz input characteristics,
Since 50/60Hz can be shared, both productivity and serviceability can be improved. Furthermore, since the same type of product can be used for 50 Hz and 60 Hz regions, it has the advantage that consumers can use it in different regions, and its practical value is extremely high.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a block diagram of the phase control device of the present invention, FIG. 2 is a 50/60 Hz input characteristic diagram of the device in FIG. 1, and FIG. The figure shows a specific circuit diagram of FIG. FIG. 4 is a block diagram of a conventional phase control device, and FIG. 5 is a 50/60H2 input characteristic diagram of the device shown in FIG. 101--Electric blower, 102-Both flesh pressure thyristor [control rectifier], 103--Current detection unit, 10
4...Voltage detection section, 105... Arithmetic circuit, 10G.
... Comparator, 107 ... Input setting section, 108 ... Phase control section agent Yoshihiro Morimoto 77 Installation A tile included in the second drawing

Claims (1)

[Claims] 1. A control rectifier is inserted in series in the power supply circuit of the electric blower, and the power consumption of the electric blower is calculated from the load current to the electric blower and the effective voltage across the electric blower. A phase control device for a vacuum cleaner configured to perform phase control so as to approach a target power consumption set in an input setting section.