JPH0790007B2 - Vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner that can always use the output of an electric blower for dust collection built in an electric vacuum cleaner body with a constant suction capacity.

(Prior Art) As a conventional vacuum cleaner of this type, for example, the configuration shown in FIGS. 14 and 15 is known.

In this electric vacuum cleaner, as shown in FIG. 14, reference numeral 1 is an electric vacuum cleaner main body, and inside the electric vacuum cleaner main body 1, a dust collecting part (not shown), an electric blower 2, and an input of the electric blower 2. A control unit 3 and the like for controlling the are provided. And
A changeover switch 4 for switching the input of the electric blower to “strong”, “automatic”, and “weak” is provided at the upper rear end of the electric vacuum cleaner body 1, and the hose portion 6 is connected to the main body of the hose portion 6 in the opening 5 of the inclined surface. The part 7 is connected.

The body connecting portion 7 is connected to a hose body 8 having a transmission line inside, and the hose body 8 is connected to a connecting pipe 9. The connection pipe 9 has a hand control unit 10, and the hand control unit 10 is provided with an on / off switch 11. Further, an extension pipe 12 is connected to the connection pipe 9, and a suction port body 13 is connected to the extension pipe 12.

Next, a block diagram of the electric vacuum cleaner will be described with reference to FIG.

In FIG. 15, reference numeral 21 is an AC power supply, and this AC power supply 21 is connected to the electric blower 2 via the control unit 3.

Further, the AC power source 21 is connected via a step-down transformer 22 to a rectifying means 23 for rectifying the alternating current into a pulsating current.
Is connected to an opening / closing means 24 for turning on / off a power source, and this opening / closing means 24 is connected to a constant voltage means 25 for making a pulsating flow a constant voltage. Further, this constant voltage means 25 is connected to the on / off switch 11 of the hand control section 10 via a resistor 26 and to the current detection means 27, and this current detection means 27 turns on / off the on / off switch 11. It is connected to the opening / closing means 24 via a comparison circuit 28 for detecting OFF.

Further, the constant voltage means 25 is a manual setting means 31 for manually setting the input of the electric blower 2, a flow rate detecting means 32 for detecting the flow rate of wind in the air passage, and an output of the flow rate detecting means 32 is electrically output. It is connected to the detection means 34 which is composed of the conversion means 33 for converting into. Then, the detection means via the amplification means 35
34 is connected to a manual switching means 36 including a manual setting means 31 and a changeover switch 4 for switching between manual operation and automatic operation, and the manual switching means 36 is connected to the secondary winding of the transformer 22 and is a zero cross detecting means 38. At the same time, it is connected to the trigger means 37 and connected to the power control means 40 connected between the AC power source 21 and the electric blower 2 via the insulating means 39.

Then, the voltage from the AC power supply 21 is stepped down by the transformer 22 and rectified by the rectifying means 23. Further, the opening / closing means 24 turns on / off the electric power by the output of the comparison circuit 28 which judges the state of the on / off switch 11 detected by the current detecting means 27. Then, the pulsating current is converted into a constant voltage by the constant voltage means 25 and the constant voltage is supplied.

Further, the manual switching means 36 switches between manual and automatic. In the case of the manual setting means 31, a constant input is used, and in the case of automatic, the flow rate detecting means 32 detects the flow rate in the air passage, and the exchanging means 33 produces an electrical output. The air is converted and amplified by the amplifying means 35 so that the wind has a constant pressure or flow rate, and each is triggered by the trigger means 37. At this time, the zero-cross detector 38 detects zero volt. In this way, the suction force of the electric blower 2 is controlled by insulating by the insulating means 39 and giving a trigger output to the electric power control means 40 to control the electric power of the AC power supply 21 to control the input of the electric blower 2. .

(Problems to be Solved by the Invention) However, in the conventional vacuum cleaner described above, the circuit in the vacuum cleaner body 1 is a control circuit that is a combination of analog circuits, and a deviation in the control width and timing of the trigger is likely to occur. , In particular a sensor as a detection means or an amplification means 35
If is bad, the output from the sensor becomes a value unsuitable for control, and the operation becomes unstable.

The present invention has been made in view of the above problems, and when the output of the electric blower is controlled by the detection unit, an electric vacuum cleaner that operates stably even when the output from the detection unit is outside the set range is provided. The purpose is to do.

(Means for Solving Problems) The present invention relates to an electric vacuum cleaner having a dust collecting section, an electric blower, a detecting means for detecting a suction capacity of the electric blower, and a control means for controlling an input of the electric blower. An electric vacuum cleaner comprising a main body and a hose part detachably connected to the electric vacuum cleaner main body, wherein the hose part, the dust collecting part, and an air passage part through the electric blower are formed. The means has an air passage detecting means for detecting at least one of the pressure and the flow rate in the air passage portion, and a converting means for converting an output of the air passage detecting means into an electric output, and the hose portion is A hand control means for setting the input of the electric blower, and a hose body including a transmission line connecting the hand control means and the vacuum cleaner body, the control means controlling the output from the hand control means. Current detecting means for detecting, storage means for converting and storing the output corresponding to the suction force set for the output of the detecting means, and processing the output from this storage means to the set suction capacity It has an arithmetic processing means and an output means for outputting to the electric blower according to the output of the arithmetic processing means, and when the electric blower operates according to the output of the detecting means, the output of the detecting means for a certain time or more. When is outside the set range, the output means drives the electric blower with a constant output signal within the control range.

(Operation) In the electric vacuum cleaner of the present invention, when the output of the electric blower is controlled by the detection means, and when the output of the detection means continues to be an inappropriate value outside the set range for a certain time or more, the output means The electric blower is driven by a constant output signal within the control range, and the output of the electric blower is stabilized even when the output from the detection means is outside the set range.

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

In FIG. 4 and FIG. 5, 41 is a vacuum cleaner body,
The vacuum cleaner main body 41 is composed of a main body case 43 having an opening 42 formed in an upper front portion thereof, and a lid body 44 having a rear end portion axially attached to the main body case 43 to open and close the opening 42. Further, the main body case 43 is composed of a lower main body case member 45 and an upper main body case member 46 joined and fixed to an upper side of the lower main body case member 45, and a front handle is provided on a front portion of the main body case 43.
A cover body 48 is attached to the upper rear part of the upper main body case member 46 so as to be openable and closable.

Inside the cover body 48, a component storage section 49 is provided, in which the hanging opening 50 and the round brush 60 are stored, and the cover body 48 has a locking piece 52.
Locked in. Further, a display window 54 of an indicator 53 showing the suction capacity is arranged on the front side of the component storage section 49. Then, behind the display window 54, for example, display light emitting diodes 55, 56, 57, 58 are provided and the level meter 5 is provided.
Make up nine. Further, the bumper 64 is located on the peripheral surface of the main body case 43 and is sandwiched by both main body case members 45 and 46.

Then, the inside of the main body case 43 is divided into front and rear by a partition wall 66 formed in a substantially central portion thereof and having a communication port 65, and an electric blower 67 is disposed in a space portion behind the partition wall 66, It is protected and fixed by an elastic member 68. further,
A circuit board 69 is provided above the electric blower 67, and a communication pipe 71 is provided between the circuit board 69 and the air passage 70 on the negative pressure side on the front side of the electric blower 67. Further, the space portion in front of the partition wall 66 has the opening 42 on the upper surface, and the electric blower 67
The dust collecting part 72 is located on the negative pressure side. Further, an exhaust port 73 communicating with the pressure boosting side of the electric blower 67 is formed on the rear surface of the main body case 43.

Further, inside the main body case 43, a cord reel 75, which is located behind the electric blower 67 and accommodates the power cord 74, is rotatably provided. The cord reel 75 is a cord reel button protruding from the button opening 76 of the cover body 48.
The power cord 74 is wound by pressing 77. Further, at the lower part of the main body case 43, a pair of wheels 78 and a turning wheel 79 are rotatably provided on the rear side of both side surfaces and the front side of the lower surface.

The lid 44 is formed in a thin box shape with an open lower surface, and a body clamp 81 urged by a spring 80 is pivotally attached to the front end of the lid 44. Then, the main body clamp 81 is disengageably engaged with the locking portion 82 formed at the upper end of the front surface of the main body case 43, and the lid body 44 is held in the closed state. Further, a handle 83 is provided near the joint between the lid body 44 and the main body case 43 so as to be rotatable and housed.

The front side of the upper surface of the lid body 44 is formed as an inclined surface 84 that descends toward the front, and a circular opening 85 is formed in the inclined surface 84.
Are formed. Also, on the lower surface side of the lid body 44, this lid body
An inner wall 86 is joined and fixed substantially parallel to the upper surface of 44, and a substantially cylindrical support 87 is fixed between the inclined surface 84 and the inner wall 86.

Further, a rotating body 88 is located between the inclined surface 84 and the inner wall 86 and is rotatably supported by the supporting body 87. Also, the rotating body 88
A pair of high-voltage terminal rings 89 for supplying power to, for example, a brush motor are fixed to the bottom surface of the high-voltage terminal ring 89, and these high-voltage terminal rings 89 are slidably contacted with a pair of contacts 90 fixed to the inner wall 86, respectively. ing. On the other hand, on the outer peripheral surface of the rotating body 88, a pair of low-voltage terminal rings 91 are fixed side by side in the axial direction, and these low-voltage terminal rings 91 respectively slide on a pair of contacts fixed to a support 87 or the like. It is controlled freely.

A lid 94 that is opened by inserting the main body connecting portion 93 of the hose portion 92 is rotatably attached to the rotating body 88.
Further, an opening is formed between the inclined surface 84 of the lid body 44 and the rotating body 88.
A flexible sliding cover body 95 for opening and closing 85 is provided so as to be slidably housed.

The hose portion 92 is attachable to and detachable from the electric vacuum cleaner body 41, and the base end of the bendable hose body 96 having the power supply line and the two-wire transmission line is attached to the main body connecting portion 93. When the hose portion 92 is connected, the power supply line is electrically connected to the pair of high voltage terminal rings 89, and the transmission line is electrically connected to the pair of low voltage terminal rings 91. The hose portion 92, the dust collecting portion 72 and the electric blower 67 communicate with each other to form an air passage portion.

Further, at the tip of the hose body 96, a grip pipe 98 to which an extendable extension pipe 97 is inserted and detachably connected is provided, and a hand operation unit 99 is provided at the grip pipe 98. And
As shown in FIG. 6 and FIG. 7, a circuit board 101 of the hand permission control means 100 is provided in the hand permission operating portion 99, and the hand permission operating portion 99 has a cover pipe 102 connected to the hose body 96 and a grip pipe. The connection pipe 103 between 98 and this connection pipe 1
A display plate 104 is attached to 03. Then, in the vicinity of the display of "strong", for example, on the display board 104, it is necessary to operate a normally open contact (for example, a product name tact switch) 111 of one circuit as an operation switch for varying the input of the electric blower 67. Operation button 112 and this operation button 112
An indicator 113, which is composed of, for example, a light emitting diode, is provided for displaying the operation position of.

Similarly, the normally open contact 11
4 Operation button 115 and display 116, near the display of "weak" the normally open contact for sofa 117 Operation button 118 and display 119 near the display of "OFF", the normally open contact for the curtain 120 operation buttons 121 are provided respectively. No display corresponding to the operation button 121 for cutting is provided.

Further, a connecting pipe 123 of a suction port body 122 having a brush electric motor built therein is attached to the extension pipe 97 in a freely attachable / detachable manner, and the suction port body 122 is selected from the hanging port 50 or the round brush 60. Can be used interchangeably.

Next, the above embodiment will be described with reference to the block diagram shown in FIG.

In FIG. 1, 131 is a commercial AC power supply, which is connected to a control means 132, which is connected to an electric blower 67 to control the input of the electric blower 67.

This control means 132 uses a commercial AC power supply 131 for a step-down transformer 13
3 primary windings 134 connected, this transformer 133 secondary winding 1
A rectifying means 136 for rectifying an alternating current into a pulsating current is connected to 35,
The rectifying means 136 is connected with first and second constant voltage means 137, 138 for converting into constant voltages of different voltages. For example, an opening / closing means 139 for opening / closing the power source of the hand permitting control means 100 is connected to the first constant voltage means 137 for supplying a current to the hand permitting control means 100, and is connected to the terminal A.

Further, a protection means 140 for protecting the hand permission control means 100 is connected between the terminals A and B, a current detection means 141 for detecting a current from the hand permission control means 100 is connected from the terminal B, and is constituted by a microcomputer. Connected to the central processing unit 142. Further, the first constant voltage means 137 is connected to the constant current means 143 which holds a constant current value.
43 is an air passage detecting means for detecting the pressure or flow rate in the air passage 70.
It is connected to a detection means 146 including 144 and a conversion means 145 for converting the detection value of the wind path detection means 144 into an electric output.

The detecting means 146 is connected to the central processing unit 142 via the amplifying means 147 which amplifies the output of the detecting means 146. Further, the second constant voltage means 138 is the central processing unit 142.
Is connected to the central processing unit 142 as it is, and is also connected to the central processing unit 142 via the initializing means 148 which initializes the progress of the program of the central processing unit 142 when the power is turned on again.

Further, the secondary winding 135 of the transformer 133 is connected to the commercial AC power supply 131.
Is connected to a central processing unit 142, which is connected to a zero-cross detecting means 149 for detecting the zero volt of the signal and discriminating the frequencies of 50 Hz and 60 Hz. Further, the first constant voltage means 137 is connected to the display means 151 for displaying the input of the electric blower 67 or the operation position of the hand control means 100 via the current limiting means 150, and the display means 151 is connected to the central processing unit 142. Connected to. Further, a sounding means 153 for notifying an abnormality such as clogging is connected from the central processing unit 142 via the sounding driving means 152.

Then, the central processing unit 142 is connected to the output means 156 including the driving means 154 and the insulating means 155.
156 is connected to a power control unit 157 connected between the commercial AC power supply 131 and the electric blower 67.

Here, the central processing unit 142 will be described.

The zero-cross detecting means 149 is via the zero-cross input means 161, and the initializing means 148 is the initializing input means 1
The current detecting means 141 and the amplifying means 147 are connected via 62 to the input switching means 163 for alternately switching the inputs from the current detecting means 141 and the amplifying means 147, and through the A / D converting means 164 for digitizing. And is connected to the data carrying means 165 for reading and reading the data. The display means 151 is connected to the display opening / closing means 166 for turning on / off the display.

Further, the data transfer means 165 is connected to a storage means 173 composed of a data storage means 171 and a temporary storage means 172, and this storage means 173 outputs the current detection means 141 and converts it.
The data is stored by converting it into an output corresponding to the suction force set for the output of 145. Further, the data transfer means 165
An arithmetic processing unit 174 that calculates the output from the input switching unit 163 and the storage unit 173 to the set suction capacity is connected to the. Further, from the data transfer means 165, a display output means 175 which is connected to the display opening / closing means 166 and operates the display opening / closing means 166, a sound output means 176 which is connected to the sound output driving means 152 and operates the sound output driving means 152, is driven. Means 15
Output means 177 connected to 4 and actuating this drive means 154
Are connected respectively.

Next, the permission control means 100 will be described with reference to FIG.

In FIG. 2, terminals A and B of the hand control means 100 are connected to the control means 132 of the electric vacuum cleaner body 41, respectively.
Further, a protection means 181 for protecting the hand permission control means 100 from a surge is connected between the terminals A and B of the hand permission control means 100.

Further, 182 is an opening / closing means, and this opening / closing means 182 is composed of a strong opening / closing means 183, an automatic opening / closing means 184, a weak opening / closing means 185, and a cutting opening / closing means 186.
Reference numerals 4,185,186 denote a heavy load means 188, an automatic load means 189, and a weak load means 19 of the load means 187 for setting the load resistance.
0 and the cutting load means 191. The load means 188, 189, 190, 191 are connected to the terminal A, and the load means 188, 189, 190, 19 are connected.
The amplifying means 192 for amplifying the output of the load resistance value of 1 is connected to the strong amplifying means 193, the automatic amplifying means 194, the weak amplifying means 195 and the cutting amplifying means 196, respectively, and is connected to the cutting amplifying means 196. Is connected to reset means 197 for resetting to off when the power is disconnected.

Then, each amplification means 193, 194, 195, 196 is connected to each opening / closing means 18
3,184,185,186, which are memory means for storing the operation content of the memory means 201, automatic memory means 203, automatic memory means 203, weak memory means 204, cutting memory means 205 are mutually set and reset. Mutual resetting means
206, the mutual reset means 206 is connected to each of the storage means 202, 203, 204, 205, respectively.
For 2,203,204,205, each storage means 20
A power supply backup means 207 for protecting the stored contents of 2,203,204,205 is connected.

Then, each of the storage means 202, 203, 204 is connected to the strong display means 212, the automatic display means 213 and the weak display means 214 of the display means 211 for displaying the operated contents, and the current value to the control means 132. Is connected to the strong current changing means 216, the automatic current changing means 217, and the weak current changing means 218 of the current changing means 215, and is connected to the terminal B of the hand control means 100. The display means 211 and the current varying means 216 are not connected to the storage means 205 for cutting.

Next, a specific circuit of the above embodiment will be described with reference to FIGS. 8 and 9.

Via the fuse 221 to the commercial AC power supply 131, the triac 2 which is the bidirectional control element of the power control means 157 of the control means 132.
22 and electric blower 67 connected in series, triac
A snubber circuit 225 for protecting the triac 222 including a resistor 223 and a capacitor 224 is connected to the 222. In addition, the electric blower 67 includes the electric blower 67 and the fuse 22.
Noise prevention circuit 229 for preventing noise, which is composed of capacitors 226, 227, 228 Δ-connected to both ends of commercial AC power supply 131 via 1
Are connected.

In addition, the commercial AC power supply 131 via the fuse 221 is a transformer.
A primary winding 134 of 133 is connected, and a protective fuse 231 and a varistor 232 connected in series in parallel are connected to the primary winding 134. Further, a diode bridge 239 composed of diodes 235, 236, 237, 238 as a rectifying means 136 is connected to the secondary winding 135, and a direct current output side of this diode bridge 239 is used for a constant voltage of, for example, 12 V of the first constant voltage means 137. 3 terminal regulator 241 is connected.

A smoothing electrolytic capacitor 242 and a capacitor 243 connected in parallel are connected between one end of the three-terminal regulator 241 and the negative electrode of the diode bridge 239.
An electrolytic capacitor 244 and a capacitor 245 are connected between the other end of the terminal regulator 241 and the negative electrode of the diode bridge 239, respectively. In addition, the diode bridge 23
On the DC output side of 9, the second constant voltage means 138, for example, 5V
3 terminal regulator 246 for constant voltage is connected, and one end of this 3 terminal regulator 246 and diode bridge 239
A capacitor 247 is connected to the negative electrode of the three-terminal regulator 246, and a smoothing electrolytic capacitor 248 and a capacitor 249 are connected to the other end of the three-terminal regulator 246 and the negative electrode of the diode bridge 239.

Further, the opening / closing means 1 is provided on the positive output side of the diode bridge 239.
N with a bias resistor 251 between the emitter and base of 39
The collector of a PN type transistor 252 is connected, and the base of this transistor 252 is connected to an NPN type transistor 254 having a bias resistor 253 between the emitter and the base. The emitter of this transistor 254 is the negative side of the diode bridge 239. It is connected to the. In addition, the base of the transistor 252 and the collector of the transistor 254 are connected to the three-terminal regulator 241 via the resistor 255,
The base of 254 is connected to central processing unit 142 via resistor 256. Further, a smoothing electrolytic capacitor 257 and a capacitor 258 are connected in parallel between the emitter of the transistor 252 and the emitter of the transistor 254.

The negative electrode of the diode bridge 239 is connected to the terminal A via the varistor 261 and the capacitor 262 connected in parallel to the protection means 140, and to the terminal B via the varistor 263 and the capacitor 264 connected in parallel. It is connected. A resistor 141 as a current detecting means is connected between the terminal B and the negative electrode of the diode bridge 239, and a resistor 265 is connected between the terminal B and the central processing unit 142.

Furthermore, 3 terminal regulator 241 and diode bridge 2
An electrolytic capacitor 271 for smoothing is connected to 39. Further, the three-terminal regulator 241 is connected to the inverting input terminal of the operational amplifier 143 as the constant current means, and the resistor 272 is connected to the non-inverting input terminal. Further, a semiconductor such as silicon as the detecting means 146 is diffused between the output terminal of the operational amplifier 143 and the resistor 272, and the resistor 27 is equivalently formed.
It forms a resistive bridge consisting of 3,274,275,276.
Among these, a variable resistor 277 as an offset gain for gain adjustment is connected between the resistors 273 and 274,
The sliding terminal of this variable resistor is connected to the amplifying means 147 via the resistor 278.
Is connected to the non-inverting input terminal of the operational amplifier 279, the connection point of the resistor 275 and the resistor 276 is connected to the inverting input terminal of the operational amplifier 279 via the resistor 280, and the resistor 281 is connected between the inverting input terminal and the output terminal. ing.

Further, the non-inverting input terminal of the operational amplifier 279 is connected to the resistor 283 connected from the inverting input terminal of the operational amplifier 143 to the output terminal of the operational amplifier 282 forming the voltage follower circuit. The output terminal of the operational amplifier 279 is connected to the inverting input terminal of the operational amplifier 285 via the resistor 284, and the non-inverting input terminal is connected to the output terminal of the operational amplifier 282 via the resistor 286. A resistor 287 and a semi-fixed resistor 288 for adjusting the amplification degree are connected between the inverting input terminal and the output terminal of the operational amplifier 285, and the output terminal is the central processing unit 1.
It is connected to 42 and is also connected to the negative electrode of the diode bridge 239 via the resistor 289.

Also, from the three-terminal regulator 241 to the initialization means 1
It is connected to the negative electrode of the diode bridge 239 through the resistor 291, the Zener diode 292 and the resistor 293 of 48.
The base of the NPN transistor 294 is connected to the connection point between the cathode of the Zener diode 292 and the resistor 293,
The collector of this transistor 294 is the first via the resistor 295.
In the three-terminal regulator 241 of the constant voltage means 137, the emitter of this transistor 294 is the base of the NPN transistor 296, the collector of this transistor 296 is the positive electrode of the diode bridge 239 via the central processing unit 142 and the resistor 297, The emitters of the transistors 296 are respectively connected to the negative electrodes of the diode bridge 239.

Further, the light emitting diodes 302 and 303 connected in anti-parallel to the zero cross detection means 149 are connected to both ends of the secondary winding 135 of the transformer 133 via the resistor 301, and these light emitting diodes 3 and 3 are connected.
A phototransistor 304 is photocoupled to 02 and 303. The collector of the phototransistor 304 is the three-terminal regulator 2 of the second constant voltage means 138.
At 45, the emitter of this phototransistor 304 is connected to the diode bridge 23 via the central processing unit 142 and the resistor 305.
9 connected to the negative electrode.

Further, one end of the resistor 150 as the current limiting means is connected to the three-terminal regulator 241, and the other end is connected to the anodes of the light emitting diodes 55, 56, 57 and 58 connected in parallel to the display means 151. The cathodes of 56, 57 and 58 are connected to the central processing unit 142.

Further, one end of the resistor 311 of the sound generation driving means 152 has a central processing unit.
142, the other end is connected to the base of a transistor 313 having a bias resistor 312 between the emitter and the base,
The emitter of this transistor 313 is the diode bridge 2
To the negative electrode of 39, the collector of this transistor 313 is connected in parallel to the buzzer 316 of the sounding means 153 having the resistor 315,
It is connected to the three-terminal regulator 241 of the first constant voltage means 137. Further, capacitors 321 and 322 are connected in parallel between the central processing unit 142 and the negative electrode of the diode bridge 239, and between the connection point between the central processing unit 142 and the capacitor 321 and the connection point between the central processing unit 142 and the capacitor 322. Resistance 323
And the oscillator 324 for the clock of the central processing unit 142 is connected in parallel.

Further, a transistor 333 having a bias resistor 332 between the emitter and the base via the resistor 331 from the central processing unit 142.
The emitter of the transistor 333 is connected to the negative electrode of the diode bridge 239, and the collector of the transistor 333 is connected to the three-terminal regulator 241 of the first constant voltage means 137 via the light emitting diode 334 of the insulating means 155 and the resistor 335. Has been done. The light emitting diode 334 is photocoupled with the phototriac 336 and electrically insulated, and the phototriac 336 is connected to the gate of the triac 222 and the connection point between the triac 222 and the electric blower 67 via the resistor 337.

Next, a specific circuit of the hand permission control means 100 shown in FIG. 2 will be described with reference to FIG.

As shown in FIG. 2, a capacitor 341 is connected between terminals A and B, and a protection means 1 is provided via a diode 342 for preventing backflow.
Resistor connected in parallel as 81, Zener diode 34
4 and electrolytic capacitor 345 are connected. And
The cathode of the diode 342 is further connected to the anode of the diode 343 for backflow prevention, and the resistor 351 and the capacitor 352 of the power source backup means 207 are connected in parallel between the cathode of the diode 343 and the terminal B.

Further, from the connection point between the cathode of the diode 342 and the anode of the diode 343, a resistor as a strong current varying means is provided.
A series circuit of a resistor 356 having 216 and a light emitting diode 113 for high power is connected in parallel, and a series circuit of a resistor 357 having a resistor 217 as an automatic current varying means and a light emitting diode for automatic use 116 is connected in parallel. , A series circuit of a resistance 358 having a resistance 218 as weak current changing means connected in series and a weak light emitting diode 119 is connected in parallel, and an amplifying means 192, a mutual resetting means 206, and a storing means 201, respectively.
Is connected to an integrated circuit 360 having the function of. In addition,
No light emitting diode for cutting is provided.

Furthermore, pull-up resistors 188, 189, 190, 191 as load means 187 are connected from the cathode of the diode 343, and the respective pull-up resistors 188, 189, 190, 191 are integrated circuits 360.
The pull-up resistor 188 for strong use is connected to the switch 183 for strong use as the opening / closing means for strong use, and the pull-up resistor 189 for automatic use is the switch for automatic use 184 as the opening / closing means for automatic use.
The weak pull-up resistor 190 is connected to the weak switch 185 serving as the weak opening / closing means, and the off pull-up resistor 191 is connected to the off switch 186 serving as the off opening / closing means. The connection point of the switching switch 186 and the switching pull-up resistor 191 and the terminal B
A capacitor 197 as a resetting device is connected between and.

Next, the operation of the above embodiment will be described with reference to the flowcharts shown in FIGS.

First, when the power is turned on (step 1), the commercial AC power supply
After the voltage of 131 is stepped down by the transformer 133 and rectified by the rectifying means 136, it is made constant by the second constant voltage means 138, and the contents of the central processing unit 142 are initialized by the initializing means 148 (step 2). Further, when the voltage is made constant by the first constant voltage means 137 and output to the hand permission control means 100 via the transmission line, the power of the hand permission control means 100 is temporarily turned off by the opening / closing means 139 and the hand permission control means 100 is reset. Storage means 201 by means 197
The content of is reset (step 3).

When the electrical angle of the AC power supply 131 shown in FIG. 13 is 0 ° or 180 °, the zero cross detection means 149 detects the voltage Zelvolt (step 4) (point a), and the output of the current detection means 141 is detected. A / D conversion means 164 via the input switching means 163
To the temporary storage means 172 (step 6).

Further, it is judged whether or not this current value is a current value of a first predetermined value slightly lower than the current value when the current value is set to "strong" (step 7), and the current value is equal to or more than the first predetermined value. When the trigger time of the triac 222 is a [m
s] (step 8), and when the current is less than the first predetermined value, it is determined whether the current value is at least a second predetermined value slightly higher than the current value when it was set to “weak” (step 9). ), If the current value is not greater than or equal to the second predetermined value, it is determined whether the current value is equal to or greater than the third predetermined value, which is the current value when set to "weak" (step 10). The electric blower 67 is turned off (step 11), and when it is higher than the third predetermined value, the trigger time of the triac 222 is set to b [ms] corresponding to "weak" output (step 12).

Further, when the current value is equal to or larger than the second predetermined value, it is determined whether or not it is within a predetermined time, for example, 2.0 [S] after the electric blower 67 is activated (step 14). The previous triac trigger time is read (step 16), and if it is within a predetermined time, a constant output is output in order to avoid unstable operation by operating according to the output of the air path detecting means 144 of the detecting means 146. The signal triac trigger time is set to C [ms] (step 1
Five).

Then, the output means 177 outputs a trigger at the set triac trigger time (step 17) (period b). After that, the output data from the airway detecting means 144 read by the A / D converting means 164 is read (step 18) (section C), and the average value of the output voltage from the airway detecting means 144 (SENA
V) is set (step 19). Then, the average value (SENAV) is compared with the data in the data storage means 171, and the arithmetic processing means 174 performs arithmetic processing (period d).

That is, when the average value (SENAV) is more than the data (SENDA1) and less than the data (SENDA2) (step 20), the triac trigger time is set to d [ms] (step 21), and the average value (SENAV) is the data (SENDA2). ) Above data (SENDA
If it is less than 3) (step 22), the triac trigger time is set to e [ms] (step 23). Similarly, the average value (SENAV) is the data (SENDA3) or more data (SENDA4)
If it is less than (step 24), the triac trigger time is set to f [ms] (step 25), and if the average value (SENAV) is more than data (SENDA4) and less than data (SENDA5) (step 26), traac trigger The time is set to g [ms] (step 27) and the data (SENDA5) or more data (SENDA5)
If it is less than A6) (step 28), the triac trigger time is set to h [ms] (step 29) and the data (SENDA
6) More than data (SENDA7) less than (step 3
0), the triac trigger time is set to i [ms] (step 31) When the data (SENDA7) is less than the data (SENDA8) (step 32), the triac trigger time is j.
[Ms] (step 33) If the data (SENDA8) is less than the data (SENDA9) (step 34), set the triac trigger time to k [ms] (step 35), the data (SENDA9) or more data (SENDA10) If it is less than (step 36), the triac trigger time is set to 1 [ms] (step 37), and the average value (SENAV) is the data (SENDA10).
If more than the data (SENDA11) is less than (step 38),
Set the triac trigger time to m [ms] (step
39).

Further, it is judged whether the average value (SENAV) is less than the data (SENDA1) outside the lower limit setting range (step 40) or is more than the data (SENDA10) outside the upper limit setting range (step 41). If not, step 19
Return to. In addition, it is determined whether or not any of the above is the Nth time or more after a certain time or more (step 42). If it is less than N times, the process returns to step 19, and if it is more than N times, the triac trigger time is set to the optimum value n [ms] as a failure of the detecting means 146 or the amplifying means 147 (step 43). Thus, 11 triac trigger times are set, and any one of these triac trigger times is stored in the temporary storage means 172 (step 44). That is, after the triac trigger, A /
The data extraction of the D conversion means 164 (period C) and the triac trigger time are arithmetically processed by the arithmetic processing means 174 (period D) (period E).

Then, for example, when the input of the electric blower 67 is set to “strong”, the operation button 112 for high power is pressed to open the open / close means 1 for high power.
83 is operated to activate the heavy load means 188, and the high power amplifying means 1 is operated.
After amplification in 93, the mutual reset means 206 resets the previous memory and stores it in the overuse memory means 202.

Further, in the heavy-duty storage means 202, the heavy-duty display means 212 is activated to turn on the heavy-duty indicator 113, and the heavy-duty current varying means 216 is activated. Then, the data is again output to the control means 132 via the transmission line, and the control means 132 inputs the current from the current detection means 141 to the central processing unit 142 to detect that it is “strong” and stores it in the data storage means 171. There is. Also,
The "strong" data is output to the output means 177, and the electric power control means 157 inputs the "strong" power from the driving means 154 to the electric blower 67 via the insulating means 155 to drive the electric blower 67 with high strength.
At this time, the level meter 59 of the electric vacuum cleaner body 41 indicates “strong” by, for example, turning on all the light emitting diodes 55, 56, 57, 58.

On the other hand, when the weak operation button 118 is pressed, the electric blower 67 inputs "weak" by the same operation, and the manual operation unit 99
The indicator 119 for weak use lights up and the vacuum cleaner body 4
The level meter 59 of 1 is, for example, the light emitting diodes 55, 56, 57,
It indicates that it is "weak" by turning on any one of the 58.

Next, a case where the input of the electric blower 67 is automatically set will be described.

When the automatic operation button 115 is pressed to make it automatic, the automatic display unit 116 of the automatic display unit 213 lights up, and the automatic current changing unit 217 is operated to operate the electric vacuum cleaner body 4 via the transmission path.
1 is transmitted to the control means 132. Then, the triac trigger time is set according to the pressure or flow rate of the air passage 70, and the electric blower 67 is driven. At this time, the number of the light emitting diodes 55, 56, 57, 58 of the display means 151 is turned on according to the output of the electric blower 67, for example.

Further, when the transmission line is cut off for a short time, the power supply backup means 207 holds the storage of the storage means 201, and after the backup is completed, the reset means 197 resets the storage and sets it to off.

According to the above-described embodiment, the trigger can be performed by the central processing unit 142 including a microcomputer, so that fine control can be performed at low cost.

(Effect of the Invention) According to the electric vacuum cleaner of the present invention, when the output of the electric blower is controlled by the detection means and the output of the detection means continues to be an inappropriate value outside the set range for a certain time or more, The output means drives the electric blower with a constant output signal within the control range, and the output of the electric blower can be stabilized even when the output from the detection means is out of the set range due to a failure of the detection means or the like.

[Brief description of drawings]

FIG. 1 is a block diagram showing a vacuum cleaner main body of an embodiment of the present invention, FIG. 2 is a block diagram showing a hand operation unit of the same, FIG. 3 is a block diagram showing a central processing unit of the same, and FIG. 5 is a perspective view showing the same electric vacuum cleaner main body, FIG. 5 is a vertical sectional view of the same as above, FIG. 6 is a plan view showing the hand operation part of the same above, FIG. 7 is a vertical sectional view of the same above, and FIG. FIG. 9, FIG. 9 is a circuit diagram showing the hand operation unit of the same, FIG. 10 to FIG. 12 are flowcharts showing the operation, FIG. 13 is a timing chart of the same, and FIG. 14 is a perspective view of the same vacuum cleaner body. FIG. 15 is a block diagram showing a conventional example. 41 …… Vacuum cleaner body, 67 …… Electric blower, 72 …… Dust collector, 92 …… Hose section, 96 …… Hose body, 100 …… Hand control means, 132 …… Control means, 141 …… Current Resistance as detecting means, 144 ... Wind path detecting means, 145 ... Converting means, 14
6 ... Detection means, 173 ... Storage means, 174 ... Arithmetic processing means.

Claims (1)

[Claims] 1. A vacuum cleaner body having a dust collector, an electric blower, a detection means for detecting the suction capacity of the electric blower, and a control means for controlling the input of the electric blower, and the vacuum cleaner body. An electric vacuum cleaner comprising: a hose part detachably connected, wherein an air passage part is formed through the hose part, the dust collecting part, and the electric blower, wherein the detection means is a pressure in the air passage part. And an airflow detecting means for detecting at least one of the flow rate and a flow rate, and a converting means for converting an output of the airflow detecting means into an electrical output, and the hose portion sets an input of the electric blower. It has a hand permission control means and a hose body including a transmission line connecting the hand permission control means and the vacuum cleaner body, and the control means is a current detection means for detecting an output from the hand permission control means. Storage means for converting and storing the output corresponding to the suction force set with respect to the output of the detection means; arithmetic processing means for arithmetically processing the output from this storage means to the set suction capacity; When the electric blower operates according to the output of the detection means, the output means outputs the electric blower according to the output of the processing means. The electric cleaner is characterized in that the output means drives an electric blower with a constant output signal within a control range.