JPH07106077B2 - Vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention is to switch the output of an electric blower built in a cleaner body by a hand control unit of a hose connected to the cleaner body. Concerning vacuum cleaners.

(Prior Art) Conventionally, as a hand control operation unit of this type of vacuum cleaner,
For example, the configurations shown in FIGS. 7 and 8 are known.

The electric vacuum cleaner shown in FIG. 7 and FIG. 8 has a hand operation part 1, and a suction hose body 2 is sequentially connected with a cover pipe 3, a connecting pipe 4 and a gripping pipe 5, and the connecting pipe 4
The hand operation unit 1 is provided in the. This hand operation unit 1
For example, a cursor 7 is provided on the display plate 6 showing the condition of the surface to be cleaned and is fixed by the cover body 8.

Next, the control circuit in the cleaner body will be described with reference to FIG.

An electric blower 15 is connected to the commercial alternating-current power supply 11 via a power control element 14, and a series circuit of a resistor 12 and a capacitor 13 as a protection circuit is connected in parallel to the electric blower 15, and the electric blower 15 is connected to the electric blower 15. Is connected to a noise prevention capacitor 16.

A primary side of the transformer 20 is connected to the commercial AC power source 11, a rectifier circuit 21 of a diode bridge is connected to a secondary side of the transformer 20, and a resistor is provided on an output side of the rectifier circuit 21.
22 and Zener diode 23 constant voltage circuit is connected,
A resistor connected in series with this Zener diode 23 in parallel.
24 and a resistor 25 are connected, the gate of a programmable unijunction transistor (PUT) 26 is connected to the connection point of the resistor 24 and the resistor 25, and the primary side of the transformer 27 is connected to the cathode of the PUT 26. A capacitor 28 is connected between the anode of the PUT 26 and the primary side of the transformer 27. A resistor 29 and a diode 30 are connected to the secondary side of the transformer 27, and the gate of the power control element 14 is connected to the diode 30.

The resistor 31 is placed between the resistor 22 and the resistor 24, and
A resistor 32 is connected to the anode of the, and the resistor 31 and the resistor 32 are connected to the hand operation unit 1 via piano wires in the hose body 2, respectively.

Further, the hand operation unit 1 has an insulating unit 34 and has a cursor 7
It has a sliding variable resistor 35, a resistor 36 and an adjusting semi-fixed resistor 37 which are driven by.

Next, the operation of this conventional vacuum cleaner will be described.

First, when the condition of the surface to be cleaned shown on the display plate 6 of the hand operation unit 1 is set by the cursor 7, the sliding variable resistor 35 driven by the cursor 7 becomes a resistance value corresponding to the condition of the surface to be cleaned. . The PUT 26, which turns on when the voltage set by the resistors 24 and 25 exceeds the potential of the anode, causes the PUT 26 to turn on when the resistance value of the sliding variable resistor 35 increases.
Since the charging time of 28 becomes long, the phase control angle of the trigger of the power control element 14 becomes large, the electric power to the electric blower 15 decreases, and the output of the electric blower 15 decreases.

On the contrary, when the variable resistance value of the sliding variable resistor 35 set with the cursor 7 becomes smaller, the charging time of the capacitor 28 becomes shorter, so the trigger phase control angle of the power control element 14 becomes smaller and the output of the electric blower 15 increases. Then, with the cursor 7, the insulation part 34
The capacitor 28 is not charged when
14 is not triggered, so it turns off.

In this way, the output of the electric blower is controlled by changing the resistance value of the continuous variable resistance.

(Problems to be solved by the invention) However, since the conventional controller for the electric vacuum cleaner uses the sliding variable resistor 35 and the like, the resistance value changes due to mechanical wear due to long-term use, and mechanically changes. Since it has an electric contact part that slides, unstable operation cannot be avoided due to poor contact or wear.

Further, since the sliding variable resistor 35 is manually slid to set the surface to be cleaned, it is necessary to adjust while watching the displayed characters.
The display of the surface to be cleaned is difficult to confirm because the display on the display board and the pointing position of the cursor are difficult to check, and it is difficult to set the target setting condition of the surface to be cleaned immediately. Therefore, there is a problem that variations in display position and input increase.

The present invention has been made in view of the above problems, and provides a control device for a vacuum cleaner that is less aging and has less electrical instability, that the setting conditions and output of the surface to be cleaned are accurate, and that the size is reduced. The purpose is to do.

[Structure of Invention]

(Means for Solving Problems) An electric vacuum cleaner according to the present invention includes an electric vacuum cleaner main body having a built-in electric blower and provided with a power control section for controlling power consumption of the electric blower, and the electric power control section. And a hose provided with a hand control unit, the power control unit supplies a current to the hand control unit of the hose, and a current detection unit that detects a current from the hand control unit. A unit, a first counter that counts the number of pulses from the current detection unit and outputs according to the counted number of pulses, a voltage setting unit that generates a voltage according to the output of the first counter,
A first power supply initialization circuit that resets the first counter when the DC power supply unit does not supply a current to the hand control unit; and the first power supply initialization circuit when the current of the current detection unit is less than or equal to a set value. A comparator that resets a counter, a trigger control unit that creates a phase control signal according to the voltage set by the voltage setting unit, and a power control element that is controlled by the trigger control unit and that controls the power from the AC power supply. The hand control unit counts the number of pulses generated by opening and closing the first switch and the opening and closing of the first switch, and outputs the output of the first counter corresponding to the counted number of pulses. A second counter that outputs a corresponding signal; a second power supply initialization circuit that resets the second counter when no current is flowing through the hand control unit; and the second counter A drive circuit operated by the output, and has a display unit that is driven by the driving circuit.

(Operation) The electric vacuum cleaner of the present invention supplies a current from the DC power supply unit of the electric vacuum cleaner main body to the hand control unit, and when the first switch of the hand control unit is opened and closed, a pulse is generated, and the electric current detection unit operates. A pulse is detected, the pulse of the current detection unit is counted by the first counter, and an output corresponding to the number of pulses is output. The voltage setting unit generates a voltage according to this output, and the trigger control unit responds to this voltage. A phase control signal was given to the power control element to drive the electric blower with electric power according to the number of opening / closing of the switch of the hand control unit, and the second counter as well as the first counter was counted and counted. According to the number of pulses, it outputs corresponding to the 1st counter, the drive circuit drives the indicator according to the output of the 2nd counter, based on the 1st counter and the 2nd counter, the indicator displays the electric blower. In response indicate. When no current is supplied from the DC power supply unit to the hand control unit, the first counter is reset by the first power supply initialization circuit, and the second counter is reset by the second power supply initialization circuit, The first counter and the second counter are made to correspond to each other.

(Embodiment) An embodiment of the electric vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 41 denotes an electric vacuum cleaner main body, which has an electric blower 42 and an electric power control unit 43 shown in FIG. 1 built therein. A dust collecting filter can be freely inserted into and removed from the front part of the electric vacuum cleaner main body 41. A dust collecting case 44 forming the attached dust collecting portion is detachably attached. At the front of the dust collecting case 44, there is provided a suction hose 45 provided with a transmission path having two reinforcing piano wires for connecting the power control unit 43 and the hand control unit 53 of the electric vacuum cleaner body 41 inside. A suction port 46 that is detachably inserted and connected is opened, and a connector 47 is provided adjacent to the suction port 46.

Further, a connection pipe portion 48 which is inserted and connected to the suction port 46 is provided at the base end of the hose 45, and the connection pipe portion 48 has a connector.
An insertion plug 49 electrically connected to 47 is provided. Further, a grip pipe 51 for inserting and connecting an extension pipe 50 and the like is provided at the tip of the hose 45, and a hand operating portion 52 is provided on the hand pipe 51, and inside the hand operating portion 52. A permission control unit 53 is provided. A suction port body 54 is detachably provided at the tip of the extension pipe 50.

As shown in FIG. 1, in the electric vacuum cleaner body 41, the electric blower 42 is connected to the commercial AC power supply 61 via the power control unit 43. In this power control unit 43, a DC power supply unit 62 is connected to a commercial AC power supply 61, a current detection unit 63 that detects a current from the hand control unit 53 is connected to the DC power supply unit 62, and the DC power supply unit 62 and the current Terminals A and B are drawn out from the detection unit 63 and connected to the connector 47.

Further, a waveform shaping circuit 64 for shaping the pulse wave from the hand movement control unit 53 from the current detection unit 63, a first counter 65 for counting the number of pulses from the hand movement control unit 53 and outputting according to the number of pulses, Depending on the output of the first counter 65, a carpet 66, a tatami floor / floor 67, a sofa 68, a curtain 69, an off 70
Voltage setting circuit 7 as a voltage setting unit that generates the voltage for
1, the trigger control unit 72 for controlling the phase angle according to the voltage of the voltage setting circuit 71 is connected in series,
The 72 is connected to a triac 73 as a power control element connected between the commercial AC power supply 61 and the electric blower 42, and controls the phase of the triac 73.

Further, the DC power supply unit 62 includes a hand control unit 53 and a DC power supply unit 62.
The first counter 65 when the current is no longer supplied from the
Is connected to the first power supply initialization circuit 74, which starts the first counter 65 from “off”, and the output terminal of the first power supply initialization circuit 74 is connected to the reset terminal of the first counter 65. It is connected.

Furthermore, a comparator 75 that resets the first counter 65 when the current of the current detection unit 63 is less than or equal to a set value is connected to the current detection unit 63 at the reset terminal of the first counter 65.

Here, the voltage setting circuit 71 will be described with reference to the circuit shown in FIG.

Connect a PNP transistor 81 with a protective resistor 82 connected between the emitter and base to the positive terminal, and output to the collector of this transistor 81 via a series circuit of a resistor 83 and a backflow prevention diode 84. Connected to the end, the connection between the resistor 83 and the diode 84 is grounded via the resistor 85,
These constitute a voltage setting circuit 71 for the carpet 66.

Similarly, connect a PNP transistor 86 with a protective resistor 87 connected between the emitter and base to the positive terminal, and connect a series circuit of a resistor 88 and a backflow prevention diode 89 to the collector of this transistor 86. The resistor 88 and the diode 89 are connected to the output terminal via the resistor 90, and the connection portion between the resistor 88 and the diode 89 is grounded via the resistor 90 to form a voltage setting circuit 71 for the folding / floor 67.

The positive terminal also has a protective resistor between the emitter and base.
A PNP type transistor 91 to which 92 is connected is connected, and the collector of this transistor 91 is connected to the output terminal through a series circuit of a resistor 93 and a diode 94 for backflow prevention, and is connected to the resistor 93 and the diode 94. The connection portion is grounded via the resistor 95 to form a voltage setting circuit 71 for the sofa 68.

Furthermore, a PNP type transistor 96, in which a protection resistor 97 is connected between the emitter and the base, is connected to the positive terminal, and a series circuit of a resistor 98 and a backflow prevention diode 99 is connected to the collector of this transistor 96. Connected to the output end via
The connection between the resistor 98 and the diode 99 is grounded via the resistor 100 to form a voltage setting circuit 71 for the curtain 69.

Note that the circuit for the disconnection 70 is used without being connected to anything.

The base of each transistor 81,86,91,96 is the first
If the decoder of the counter 65 of the above outputs “L” to the corresponding output, the decoder of the first counter 65 outputs “H” to the corresponding output as it is to the corresponding output terminal of the first counter 65. In the case of output, it is connected to the corresponding output terminal via each inverter circuit.

Next, the hand operation unit 52 shown in FIGS. 3 and 4 will be described.

In the hand operation part 52 provided on the grip tube 51 at the end of the hose 45, for example, a light emitting diode 101 as a carpet display, a light emitting diode 102 as a folding / floor display, and a sofa display. Light emitting diode 103,
A light emitting diode 104 is provided as a display for the curtain. Then, each light emitting diode 101, 10
Characters on the surface to be cleaned are displayed near 2, 103 and 104, and a first operation button 106 for setting conditions of the surface to be cleaned and a second operation button 107 for setting “off” are provided. As shown in FIG. 4, the first operation button 106 is provided on the normally open first switch 108, and the contact is made only when the operation button 106 is pressed. The second operation button 107 is also provided on the second switch 109 in the same manner.

The circuit of the hand control unit 53 of the hand operation unit 52 has a terminal A and a terminal B connected to a plug 49 connected to the power control unit 43 of the electric vacuum cleaner body 41, as shown in FIG. However, between these terminals A and B, a diode 111 for preventing backflow and a second operation button 107 operated by a second operation button 107 are provided.
The switch 109, the load circuit 112, and the first switch 108 operated by the first operation button 106 are connected in series.

Further, the first switch 1 is provided at both ends of the first switch 108.
A waveform shaping circuit 113 that removes the noise component of the pulse number from 08 and shapes the pulse waveform is connected, and the output of this waveform shaping circuit 113 is configured to be input to the second counter 114. The output according to the number counted by the counter 114 is connected so as to be input to each drive section in the corresponding drive circuit 115, and the drive circuit 11
This drive circuit 115 is connected to the diode 11
It is connected between 1 and terminal B. Furthermore, drive circuit 1
Each drive unit of 15 has a corresponding light emitting diode 101, 10
It is connected to a display unit 116 composed of 2,103,104.

Further, 117 is a second power source initializing circuit, and this second power source initializing circuit 117 is connected to the diode 111 and the terminal B in order to detect whether a current is flowing to the hand control unit 53, and It is connected to the reset terminal of the second counter 114 so as to reset the second counter 114 when the current stops flowing to the hand control unit 53 and start the second counter 114 from “off”.

Further, the hand control unit 53 is provided between the diode 111 and the terminal B.
A protection circuit 118 for protecting the is connected.

Further, the power control unit 43 and the hand control unit of the vacuum cleaner body 41
53 is connected to the inside of the hose 45 by two wires (not shown) for reinforcement and transmission, not shown.

Next, the operation of the above embodiment will be described.

First, the plug 49 of the hose 45 is connected to the connector 47 of the vacuum cleaner body 41, and the power control unit 43 of the vacuum cleaner body 41 is connected to the AC power supply 61.

At this time, since the first switch 108 is not operating, no pulse is generated, and the first counter 65 and the second
Both counters 114 are reset, the voltage setting circuit 71 maintains the state of OFF 70, and the electric blower 42 is in the stopped state.

Here, when the first operation button 106 is further pressed, the first switch 108, which is normally open, is closed to energize, and a pulse is generated. Then, this pulse is detected by the current detection unit 63 of the power control unit 43 in the electric vacuum cleaner body 41, the waveform shaping circuit 64 removes noise to shape the pulse waveform, and the first counter 65 counts it. . Then, the first counter 65 counts one pulse and outputs the corresponding output to the voltage setting circuit.
The voltage corresponding to the curtain 69 is output to the trigger control unit 72 by the voltage setting circuit 71, and the trigger control unit 72 outputs the voltage.
Then, the triac 73 is controlled at a phase angle at which the electric power consumption of the electric blower 42 corresponds to the curtain, and the output of the electric blower 42 corresponds to the curtain. At this time, in the hand control unit 53, the waveform shaping circuit 113 removes noise from the pulse to shape the waveform, and the second counter 114 counts one pulse,
Drive circuit corresponding to the curtain corresponding to one pulse 115
The light emitting diode 104 that drives the
Lights up. In this way, the first counter 65 and the second counter 114 operate correspondingly.

After that, the first operation button 106 is pressed again and the first switch 1
When 08 is closed and a pulse is given, the first counter 65 and the second counter 114 increase the number of pulses by one so that the total number of pulses becomes two, and the voltage setting circuit is the sofa 68.
The output of the electric blower 42 is set to the output corresponding to the sofa, and the display unit 116 is the light emitting diode 1 of the sofa.
Turn on 03. Then give a pulse and blower 42
It is driven by the output corresponding to each of the tatami / floor and the carpet, and the display unit 116 also lights the corresponding light emitting diode.

In this way, when the total number of pulses counted by the first and second counters 65 and 114 is 0, the voltage setting circuit 71 is turned off 70 and the electric blower 42 is stopped. When the total number of pulses is 1, the voltage setting circuit 71 is turned off. Becomes the curtain 69, operates the electric blower 42 with the output corresponding to the curtain, lights the light emitting diode 104, and when the total number of pulses is two, the voltage setting circuit 71 becomes the sofa 68 and outputs the electric blower 42 with the output corresponding to the sofa. When operating, the light emitting diode 103 is turned on. When the total number of pulses is three, the voltage setting circuit 71 becomes the folding / floor 67 and the electric blower 42 is folded / operating with the output corresponding to the floor and the light emitting diode 102 is turned on,
When the total number of pulses is four, the voltage setting circuit 71 becomes the carpet 66 and the electric blower 42 is operated at an output corresponding to the carpet and the light emitting diode 101 is turned on.

Then, when the total number of pulses is five, it is turned off, and when the total number of pulses is five or more, the above operation is repeated. That is, the total number of pulses is divided by 5 which is the set number of outputs, and the operation corresponding to the number of pulses corresponding to the remaining number of pulses is performed.

When directly setting “OFF”, if the second operation button 107 is pressed and the normally closed second switch 109 is opened under any setting condition, current does not flow to the hand control unit 53 and the second power source is turned off. When the initializing circuit 117 resets the second counter 114 and the second switch 109 is opened, the hand control unit 53 does not flow any current other than the protection circuit 118, and the current of the current detection unit 63 falls below the set value. First by comparator 75
Reset counter 65 of. Therefore, the first and second counters 65 and 114 are in the “off” state, and the electric blower 42 is stopped.

In addition, when the power is removed, the socket 49 of the hose 45 is disconnected from the connector 47 of the vacuum cleaner main body 41, and the current from the DC power supply unit 62 of the vacuum cleaner main body 41 does not flow to the hand control unit 53. In this case, the first and second power supply initialization circuits 74 and 117 respectively
The counters 65 and 114 are reset, and both the voltage setting circuit 71 and the display unit 116 are turned off. Further, the comparator 75 ensures resetting of the first counter 65. This will cause the hose 45 to come off and the first counter
The number of pulses counted by 65 and the second counter 114 is not different, and the number of pulses counted by the first counter 65 and the second counter 114 is always the same.

In the above-described embodiment, the light emitting diode 105 is provided for confirming the power-on even in the "off" state, but the light emitting diode indicating "off" may not be provided.

In addition, the setting of the output strength is not limited to 5 steps including "OFF", but if it is not 5 steps, the output corresponding to the number of extra pulses when the number of pulses is divided by the set number of strength It may be set so that the light emitting diode operates.

〔The invention's effect〕

According to the electric vacuum cleaner of the present invention, both the outputs of the first counter and the second counter are output corresponding to the number of pulses, and the output is displayed on the display device corresponding to the output of the electric blower. Since it does not rely on a switch that has a variable resistance and mechanical contacts to slide on, there is no change due to aging or instability due to poor contact, the setting conditions of the surface to be cleaned and the output of the electric blower are accurate, and operability is good. The condition of the surface to be cleaned can be set.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electric vacuum cleaner body and a hand control unit of an embodiment of the electric vacuum cleaner of the present invention, FIG. 2 is a perspective view showing the same electric vacuum cleaner body, and FIG. 3 is the same hand hand operation control. FIG. 4 is a side view showing the part, FIG. 4 is a cross-sectional view showing the same hand operation control part, FIG. 5 is a circuit diagram showing the same voltage setting circuit, and FIG. FIG. 7 is a side view showing the same hand operation control section, and FIG. 8 is a plan view showing the same. 41 …… vacuum cleaner body, 42 …… electric blower, 43 …… power control unit, 45 …… hose, 53 …… hand control unit, 61 …… commercial AC power supply, 62 …… DC power supply unit, 63 …… Current detector, 65 ...
... first counter, 71 ... voltage setting circuit as voltage setting section, 72 ... trigger control section, 73 ... triac as power control element, 74 ... first power source initialization circuit, 108 ... 1 switch, 114 …… second counter,
115 ... Drive circuit, 116 ... Display unit, 117 ... Second power source initialization circuit.

Claims (1)

[Claims] 1. An electric vacuum cleaner body having a built-in electric blower and provided with a power control unit for controlling power consumption of the electric blower,
A hose provided with a hand permission control section electrically connected to the power control section, wherein the power control section supplies a direct current power source for supplying current to the hand permission control section of the hose; A current detection unit that detects a current, a first counter that counts the number of pulses from this current detection unit and outputs according to the counted number of pulses, and a voltage is generated according to the output of this first counter. A voltage setting unit, a first power supply initialization circuit that resets the first counter when the DC power supply unit does not supply a current to the hand control unit, and the current of the current detection unit is less than or equal to a set value. Sometimes a comparator for resetting the first counter, a trigger control unit for producing a phase control signal according to the voltage set by the voltage setting unit, and an AC power supply controlled by the trigger control unit. And a power control element for controlling the power of the first switch, wherein the hand control unit counts the number of pulses generated by opening and closing the first switch and corresponds to the counted number of pulses. A second counter that outputs an output corresponding to the output of the first counter; and a second power supply initialization circuit that resets the second counter when no current is flowing to the hand control unit, An electric vacuum cleaner comprising: a drive circuit that operates according to the output of the second counter; and a display unit that is driven by the drive circuit.