JP2008178564A - Electric vacuum cleaner - Google Patents

Abstract

An electric cleaning device that can send a control signal to a control unit using a voltage waveform supplied from a vacuum cleaner body to a suction port body or a power supply unit of a communication pipe, and can reliably transmit the control signal. Provide a machine.
The suction port body 5 is provided with a suction port motor 13 for rotating a rotary cleaning body 18. The suction port motor 13 operates with the suction port power supply 48 as a power source, and the operation is instructed by the operation button 11 of the hand operation tube 12. A resistor 70 is connected to the power line 16 that supplies power from the cleaner body 1 to the suction port 5. The suction port control unit 52 is controlled by the bidirectional thyristor 39 and controls the suction port motor 13 based on a control signal input from the cleaner body 1 to the power source detection unit 54 via the power lines 14 and 16. Since the resistor 70 is provided, even when the suction port motor 70 is not driven, a holding current that maintains the ON state of the bidirectionality 39 flows because power is consumed, and the control signal can be reliably transmitted.
[Selection] Figure 4

Description

  The present invention relates to an electric vacuum cleaner including an operation part to which power is supplied from a vacuum cleaner main body and a control unit for controlling the operation part on a suction port body or a communication pipe.

  As a conventional vacuum cleaner, for example, a vacuum cleaner described in Patent Document 1 is known. In this electric vacuum cleaner, for example, a hand circuit portion to which power is supplied from the vacuum cleaner main body through two wires in the hose is provided in a hose. The hand circuit unit is provided with output means for outputting such as display and notification. On the other hand, the vacuum cleaner main body is provided with dust amount detection means and signal transmission means for outputting main body information corresponding to the dust amount detected by the dust amount detection means to the wiring.

Then, the main body information is transmitted to the local circuit unit by controlling the power supply voltage according to the amount of dust. The hand circuit section detects the controlled power supply voltage, and outputs the detection result to the output means. The output means displays or informs the main body information. According to this electric vacuum cleaner, it is possible to perform power supply and signal transmission to the local circuit unit without increasing the wiring of the hose.
JP 2001-104226 A

  Although the technical idea of transmitting a signal using the voltage waveform of the power source supplied from the cleaner body to the hand circuit unit is disclosed in Patent Document 1, a specific configuration for realizing this is disclosed. Absent. The inventor of the present application has repeatedly investigated the use of the voltage waveform of the power supply as a signal. When a bidirectional thyristor is used to easily control the voltage waveform of the AC power supply, the following problems are encountered. It was found to occur.

  The bidirectional thyristor is usually used for the purpose of controlling the power of a load such as a motor. In this case, the control thyristor is turned on when a control signal is supplied to the control terminal, and then the power is consumed by the load. For this reason, a holding current necessary for continuously operating the bidirectional thyristor flows and can be conducted until the power supply voltage is inverted. On the other hand, when the voltage waveform of the power supply is used as a signal, the bidirectional thyristor may be controlled even when a load such as a motor is not operating. In this case, the bidirectional thyristor is turned on by the control signal to the control terminal, but there is a risk that the connected load is light and sufficient current does not flow, and the conduction state cannot be maintained until the power supply voltage is reversed. As a result, there arises a problem that the reliability of the voltage waveform of the power supply used as the signal is lowered.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems and to obtain a vacuum cleaner that can use a voltage waveform of a power supply as a signal and can reliably transmit a signal.

  In order to achieve the above object, the present invention provides a vacuum cleaner body provided with an electric blower, a communication pipe connected to the vacuum cleaner body and provided with a power line, and an operation of the electric blower connected to the communication pipe to generate dust. Suction port body, a power supply unit provided in the suction port body and supplied with an AC voltage from the cleaner body via a power line, and an operation provided by the power supply unit provided in the suction port body And the vacuum cleaner main body is provided with a bidirectional thyristor connected to the power line and a control signal output unit for outputting a control signal to the bidirectional thyristor. A vacuum cleaner provided with a main body control unit for controlling a voltage waveform, and a suction port body provided with a control unit for controlling the operation unit based on an AC voltage waveform controlled by the main body control unit. Vacuum cleaner in operating state The load that consumes power from the body to the power supply unit which are connected to the power line.

  ADVANTAGE OF THE INVENTION According to this invention, a control signal can be sent to a control part from a main body control part using the voltage waveform supplied from a cleaner body, and also the reliability of signal transmission can be improved.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  First, the configuration of the electric vacuum cleaner will be described with reference to FIGS. 1, 2, and 3. The vacuum cleaner has a vacuum cleaner body 1, a hose 3 having one end detachably connected to the suction port 2 formed in the vacuum cleaner body 1, and one end detachably connected to the other end of the hose 3. Extension pipe 4 and a suction port body 5 detachably connected to the other end of the extension pipe 4. The hose 3 and the extension pipe 4 constitute a communication pipe 6.

  The vacuum cleaner main body 1 is provided with a dust collection bag 8 as a dust collection portion communicating with the hose 3 via the electric blower 7 and the suction port 2, and the intake air of the electric blower 7 passes through the dust collection bag 8. Thus, the dust collection bag 8 separates and collects the dust. Further, a swivel wheel (not shown) that can turn freely is provided on the front lower surface of the main body 1, and a pair of large-diameter driven rear wheels 9 (only one is shown) are provided on the rear side surface of the main body 1.

  The hose 3 is formed of a substantially cylindrical shape that is extendable and bendable, and has a hand operation tube 12 (hand operation unit) including a handle 10 and an operation button 11 for setting an input of the electric blower 7 and the like. Yes. The operation button 11 is configured to be able to select a plurality of types of operation modes in which the electric blower 7 and the suction port motor 13 are driven in different states. Specifically, as shown in the figure, the operation button 11a for setting the stop of the electric blower 7 toward the direction of the extension pipe 4 from the hose 3 and the operation setting for strong input / weak input of the electric blower 7 are used. Operation buttons 11b and operation buttons 11c for setting forward / reverse / stop operation of the suction port motor 13 are sequentially arranged in a line.

  Further, the hose 3 is provided with a pair of power lines 14 for connecting a power source of the electric blower 7, for example, an AC power source and the suction port body 5. Further, the hose 3 is provided with a pair of signal lines 15 that connect a body control unit (described later) provided on the vacuum cleaner body 1 and the hand operation unit 12. One of the signal lines 15 shares the power line 14. The power line 14 and the signal line 15 are arranged from one end of the hose 3 to the other end.

  The extension pipe 4 includes a large diameter pipe 4a and a small diameter pipe 4b inserted into the large diameter pipe 4a. The extension pipe 4 can be extended and contracted by sliding the small diameter pipe 4b with respect to the large diameter pipe 4a. . A pair of power lines 16 are provided on the large diameter pipe 4 a and the small diameter pipe 4 b, and the power lines 16 are connected to a power line 14 provided on the hose 3.

  Next, the configuration of the suction port body 5 will be described in detail. The suction port body 5 is detachably attached to the distal end of the extension pipe 4 and is provided with a suction opening 5a for sucking dust on the surface to be cleaned. FIG. 2 is a plan view showing the configuration of the suction port body 5 as viewed from the cleaning surface (bottom surface) side. As shown in FIG. 2, a suction port motor 13 as an operation unit is disposed in the suction port body 5, and the rotation of the suction port motor 13 is transmitted to the rotary cleaning body 18 by a power transmission mechanism 17. It is like that. A cleaning surface switch 19 that functions as a safety switch of the suction port motor 13 is disposed on the cleaning surface (bottom surface) side of the suction port body 5. A suction port circuit board 21 on which the suction port control device 60 is mounted is incorporated in the suction port body 5.

  Next, a circuit configuration including the main body control unit 30 built in the cleaner main body 1 and the suction port control device 60 built in the suction port body 5 will be described with reference to FIG. Reference numeral 31 denotes a commercial AC power source. The main body control unit 30 constitutes a part of a switching element driven by a control signal, for example, a bidirectional thyristor 32, a current fuse 33, and an electric blower 7, and is driven by an AC power source. A commutator motor (hereinafter simply referred to as a motor) 34 is connected in series.

  The electric blower 7 mainly includes a motor 34 and a fan 35 rotated by the motor 34. The motor 34 is, for example, a universal motor including a brush (not shown), an armature 34a having a commutator that slides on the brush, and field windings 34b and 34c. The fan 35 is a centrifugal fan connected to the rotating shaft of the motor 34, and when the fan 35 is rotated by the motor 34, the dust-containing air passes from the suction port body 5 through the extension pipe 4 and the hose 3 to the vacuum cleaner main body. Inhaled into 1. Reference numeral 36 denotes a zero-cross detection unit that detects a zero-cross point of the AC power supply voltage applied to the motor 34.

  Reference numeral 37 denotes a main body control device comprising a microcomputer and constituting a control signal output unit. The signal line 15 connected to the hand operation tube 12 is connected to the I / O unit 38, and the hand operation tube 12 An instruction signal or the like is input to the I / O unit 38. Then, the main body control device 37 takes in the zero cross timing of the commercial AC power supply 31 and takes in the instruction signal from the hand control tube 12, and as a power control element connected to the bidirectional thyristor 32 and the power line 14. A control signal is output to the control terminal of the bidirectional thyristor 39.

  Furthermore, a load 70 composed of a resistance element is provided between a pair of power lines that connect the AC power supply 31 and a power supply unit (described later) provided in the suction port body 5. The load 70 is connected in parallel with the power supply unit and is provided in the cleaner body 1 in the present embodiment, but may be provided on either of the power lines 14 and 16. From the viewpoint of cooling, the load 70 is preferably arranged in the air path generated by the electric blower 7.

  Further, the resistance components 12a to 12c provided in series with the operation buttons 11a to 11c of the hand operation tube 12 have different resistance values, and the divided voltage value of the output voltage of the main body power supply unit 40 is set to the operation button. The circuit configuration (voltage variable circuit) for changing according to the 11 operation states is formed. Then, the main body control device 37 periodically reads the partial pressure value that varies depending on the operation state of the operation button 11.

  The main body control device 37 mainly includes a central processing unit 41, a memory 42, the I / O unit 38 described above, a timer 43, and the like. The memory 42 stores data such as a control program executed by the central processing unit 41 and necessary constants in advance, and a data storage area and work area for temporarily storing calculation data of the central processing unit 41 and the like. Used as.

  Reference numeral 44 denotes a current detection unit that detects a current flowing through the electric blower 7, and an output of the current detection unit 44 is input to the main body control device 37. The main body control device 37 operates a not-shown notifying unit provided in the cleaner main body 1 according to the output of the current detection unit 44. As a result, the user is informed of information related to the amount of dust collected in the dust bag 8.

  Next, the structure of the suction inlet control apparatus 60 provided in the suction inlet body 5 is demonstrated. A suction port power supply unit 48 as a power supply unit is connected to the commercial AC power supply 31 via a bidirectional thyristor 39. The output timing of the control signal of the bidirectional thyristor 39 is controlled by the main body control device 37 as described above. The suction port power supply unit 48 includes a rectifying unit 48a, a step-down unit 48b, a constant voltage unit 48c, and the like connected to the power line 16. The rectifying unit 48a is composed of, for example, a diode, and the constant voltage unit 48c is composed of, for example, an electrolytic capacitor. A bridge circuit 49 including four switching elements 49 a to 49 d such as transistors is connected to the rectifying unit 48 a, and the inlet motor 13 is connected to the bridge circuit 49. Moreover, the suction inlet power supply part 48 functions also as a power supply of the suction inlet control part 50 as a control part.

  The inlet control unit 50 mainly includes a memory 51, a central processing unit 52, an I / O unit (not shown), and a timer 53. The memory 51 stores data such as a control program related to the operation of the operation unit provided in the suction port body 5 and necessary constants in advance. A power source detection unit 54 is connected to the suction port control unit 50.

  Information on the AC voltage waveform supplied from the power supply detection unit 54 to the suction port power supply unit 48 from the power supply detection unit 54, in other words, a signal is input to the suction port control unit 50. And according to this waveform information, an ON / OFF control signal is output to each of the switching elements 49a to 49d of the bridge circuit 49 to control the rotational speed and direction of the suction inlet motor 13. For example, when the suction port control unit 50 turns on the switching elements 49a and 49d, the suction port body 5 rotates (forward) so as to move forward with respect to the cleaning surface, and conversely, the switching element 49b When 49 and 49c are turned on, the suction port body 5 rotates (reverses) so as to move backward with respect to the cleaning surface.

  The main body control device 37 supplies a control signal to the control terminal of the bidirectional thyristor 39 at a predetermined timing when an outlet is inserted and power is supplied from a commercial power supply, and the power supply section 48 of the suction port body 5. To supply power. As a result, the suction port control unit 50 is operable by being supplied with power. At this time, the suction port controller 50 does not output anything to the switching elements 49 a to 49 d of the bridge circuit 49.

  In such a configuration, when the operation button 11 of the hand control tube 12 is operated, a signal based on this operation is input to the main body control device 37. When the signal indicates that the electric blower 7 is to be operated, a control signal is supplied from the main body control device 37 to the control terminal of the bidirectional thyristor 32 and the electric blower 7 is driven. The main body control device 37 can vary the input of the electric blower 7 by phase control.

    When the operation button 11 </ b> C is operated and a signal for operating the suction port motor 13, which is the operating portion of the suction port body 5, is input to the main body control device 37, the main body control device 37 is connected to the bidirectional thyristor 39. For example, the control signal is supplied to the control terminal after a time tb from the timing shown in FIG. 4E, that is, the zero cross timing of the power supply voltage. At this time, the suction port motor 13 is not operating, but since the resistor 70 is connected between the power lines 14, 14, the power supplied from the cleaner body 1 to the suction port body 5 is consumed, and bidirectionality is achieved. A current exceeding the holding current flows through the thyristor 39. Therefore, the bidirectional thyristor 39 is surely turned on until the power supply voltage is inverted, so that the voltage shown in FIG. 4F is generated between the suction port terminals, that is, the power line 16. Note that the output timing of this control signal is predetermined based on the operation of the operation button 11C, and a control signal is supplied to enable the suction port control unit 50 to operate when the power is turned on as described above. Are set at different timings that can be easily distinguished from each other. Further, as shown in FIG. 4F, the voltage waveform may be the same until the next operation is performed after the operation button 11C of the hand operation unit 12 is operated, that is, the control signal may be continuously output. Then, the voltage waveform corresponding to the operation is set only for a predetermined period after the operation button 11C is operated, and thereafter, the voltage waveform of the AC power source shown in FIG. 4A is set, that is, the control signal is output only for the predetermined period. May be. In this case, the power source detection unit 54 detects a voltage waveform during a predetermined period, converts the voltage waveform into a suction port power source detection signal, and outputs the suction port power source detection signal to the suction port control unit 50. And the suction inlet control part 50 controls the suction inlet motor 13 according to a suction inlet power supply detection signal. Thereafter, the power source detection unit 54 detects the voltage waveform of the AC power source and outputs a suction port power source detection signal to that effect to the suction port control unit 50. And the suction inlet control part 50 is controlled so that the suction inlet motor 13 maintains the former state.

  Here, in FIG. 4F, the voltage waveform indicated by the dotted line is a voltage waveform generated between the suction port terminals when the load 70 is not connected. This is because, when the suction port motor 13 is not operating, the load connected to the power line is only a light load such as a microcomputer constituting the suction port control unit 50. This is because at a certain point, the current becomes lower than the holding current. In the case of a configuration in which the power supply waveform to the suction port power supply unit 48 is used as a signal, the voltage waveform in the dotted line portion becomes a large error factor when the power supply detection unit 54 converts the voltage waveform into the suction port power supply detection signal, etc. Adversely affect signal transmission.

  However, according to the above configuration, since the load 70 is provided between the pair of power lines connecting the AC power supply 31 and the suction port power supply unit 48, the power from the cleaner body 1 is consumed by the load 70. Thus, a sufficient current exceeding the holding current flows through the bidirectional thyristor 39. For this reason, the bidirectional thyristor 39 is conducted until the power supply voltage is inverted, and the inlet-terminal voltage during the period td shown in FIG. 4 is substantially the voltage indicated by the solid line in FIG. It becomes a waveform, and the influence on the voltage waveform controlled by the bidirectional thyristor 39 can be suppressed as much as possible. Therefore, even if the suction port motor 13 is in a non-operating state, the power source detection unit 54 of the suction port body 5 can reliably receive the voltage waveform of the power source controlled by the main body control unit 30. As described above, since the holding current flows through the bidirectional thyristor 39 when the inlet motor 13 is operating, the load 70 is connected to the power line at least when the inlet motor 13 is not operating. It only has to be adapted.

  When the operation button 11C is operated again, the main body control device 37 outputs a control signal to the bidirectional thyristor 39 at a timing different from the output timing shown in FIG. Based on this, the suction port control unit 50 controls the suction port motor 13 to be reversed, for example. After that, when the operation button 11C is operated again, the suction port motor 13 is controlled to stop similarly.

  Since it is as above-mentioned, the power supply detection part 54 shows the voltage waveform shown as the continuous line in (f) of FIG. 4 (f) by which the bad influence to the voltage waveform by the shortage of the current which flows into the bidirectional thyristor 39 was suppressed. It can be converted into a detection signal of the suction port power source shown in g-1) or (g-2), and this detection signal can be output to the suction port control unit 50. In the case of the detection signal shown in FIG. 4G-1, the suction port control unit 50 detects the high level period td or the low level period tc, and sets the suction port motor 13 in a predetermined state according to the detection result. For example, the switching elements 49a and 49d are turned on to perform normal rotation. Moreover, in the case of the detection signal of FIG.4 (g-2), the inlet control part 50 measures the voltage value Vs, and controls the inlet motor 13 similarly according to this measured value.

  As described above, according to the electric vacuum cleaner of the present embodiment, the operation unit such as the inlet motor 13 is controlled using the voltage waveform of the power source of the inlet motor 13 supplied from the cleaner body 1. be able to. In addition, since the load 70 is provided between the pair of power lines connecting the AC power supply 31 and the suction port power supply unit 48, the holding current can be surely passed through the bidirectional thyristor 39, and the signal transmission reliability is ensured. The decrease can be suppressed. In addition, since the load 70 is provided in the cleaner body 1, it is possible to prevent the suction port body 5 from becoming large, and further, the load 70 is arranged in the wind path of the wind flowing by the electric blower 7. Thus, the heat generating load 70 can be efficiently cooled, and the safety against heat generation is improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. The description of the same configuration as that of the first embodiment is omitted. In the present embodiment, the load 70 shown in FIG. 3 is not provided. As a means for preventing the bidirectional thyristor 39 from being inadvertently turned off, the load 70 is connected to the power supply line 14 in the first embodiment, whereas in the present embodiment. The control signal control by the main body control device 37 is devised.

  When the operation button 11 </ b> C is operated and a signal for operating the suction port motor 13, which is the operation unit of the suction port body 5, is input to the main body control device 37, the main body control unit 37 controls the bidirectional thyristor 39. For example, a control signal is output to the terminal as shown in FIG. That is, the main body control unit 37 continues to substantially output the control signal from the time when the control signal rises until the time when the AC power supply voltage waveform reaches the next zero cross point. In the present embodiment, the control signal is continuously output for a period from the time tb of the zero cross point to immediately before the next zero cross point. Thereby, regardless of the load connected to the power lines 14 and 16, the bidirectional thyristor 39 can be kept conductive during this period.

  Therefore, the waveform of the voltage between the suction port terminals is as shown in FIG. 5F, and the suction port power supply detection signal output from the power supply detection unit 54 is as shown in FIG. 5G-1. The suction port control unit 50 detects the high level period te or the low level period tf of the detection signal, and turns on the suction port motor 13 in a predetermined state, for example, by turning on the switching elements 49a and 49d according to the detection result. Turn.

  In addition, when the suction port motor 13 is in an operating state, the bidirectional thyristor 39 is supplied with a current equal to or higher than the holding current, so that the suction terminal voltage is from the time point tb after the zero cross point to the next zero cross point. A voltage is generated, and therefore the suction port power supply detection signal output from the power supply detection unit 54 is also longer than the time te. However, the suction port control unit 50 determines this to be equivalent to the time te, and turns on the switching elements 49a and 49d to rotate the suction port motor 13 in the normal direction.

  As described above, according to the vacuum cleaner of the present embodiment, the operation unit such as the suction port motor 13 can be controlled as in the first embodiment. In addition, since the main body control unit 37 continues to substantially output the control signal from the time when the control signal rises to the time when the AC power supply voltage waveform reaches the next zero cross point, the bidirectional thyristor 39 is inadvertently turned off. Can be prevented, and a decrease in signal transmission reliability can be suppressed.

  In the present embodiment, the main body control device 37 continues to output the control signal for a period from the time point tb after the zero cross point until the next zero cross point is reached. The signal may continue to be output until the point in time. However, there is a further advantage as described below by not outputting the control signal until the next zero cross point as in the present embodiment. That is, when the main body control device 37 continues to output the control signal from the rising point of the control signal to the next zero cross point, if a detection error occurs in the zero cross detection section 36 of the main body control section 30, the zero cross point is exceeded. Although there is a possibility that the control signal is output until the time point, in the present embodiment, such a possibility is small. Accordingly, it is possible to further suppress a decrease in signal transmission reliability.

  In each of the above-described embodiments, the operation unit provided in the suction port body 5 has been described. However, the operation unit may be provided in the communication pipe 6. In this case, a power source detection unit that detects a voltage waveform from the cleaner body 1 and The control unit 50 that controls the operation unit may be provided in the communication pipe 6. For example, it is conceivable that a display unit or the like for displaying a dust clogging state based on the detection result of the current detection unit 44 is provided in the hand operation tube 12 of the communication tube 6. As described above, even when the operation unit and the power source detection unit are provided in the communication pipe 6, the same effects as those of the above embodiments can be obtained.

The perspective view which shows the structure of the vacuum cleaner which concerns on embodiment of this invention. The top view which shows the structure of the suction inlet main body which concerns on embodiment of this invention. The figure which shows the circuit structure of the vacuum cleaner which concerns on 1st embodiment of this invention. The figure which shows the voltage and signal waveform of each part in the embodiment. The figure which shows the voltage and signal waveform of each part in 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner body 5 Suction port body 6 Communication pipe 7 Electric blower 13 Suction port motor (operation | movement part)
14 Power line 16 Power line 30 Main body control unit 37 Main body control device (control signal output unit)
39 Bidirectional Thyristor 48 Suction Port Power Supply Unit (Power Supply Unit)
50 Suction port control unit (control unit)
54 Power supply detection unit (detection unit)

Claims (4)

A vacuum cleaner body provided with an electric blower, a communication pipe connected to the vacuum cleaner body and provided with a power line, a suction port body connected to the communication pipe and sucking dust by operation of the electric blower, and the suction port A power supply unit that is provided on the body and supplied with power by applying an AC voltage from the cleaner body through the power line, and an operation unit that is provided on the suction port body and operates by the power supply unit,
An AC voltage waveform applied from the cleaner body to the power supply unit, comprising a bidirectional thyristor connected to the power line and a control signal output unit for outputting a control signal to the bidirectional thyristor in the cleaner body. A main body control unit for controlling
A vacuum cleaner provided with a control unit for controlling the operation unit based on an AC voltage waveform controlled by the main body control unit in the suction port body,
A vacuum cleaner, wherein a load that consumes power from the vacuum cleaner main body to the power supply unit is connected to the power line in a non-operating state of the operation unit. A vacuum cleaner body provided with an electric blower, a communication pipe connected to the vacuum cleaner body and provided with a power line, a suction port connected to the communication pipe and sucking dust by operation of the electric blower, and the communication pipe And a power supply unit to which power is supplied by applying an AC voltage from the vacuum cleaner body via the power line, and an operation unit that is provided in the communication pipe and operates by the power supply unit,
An AC voltage waveform applied from the cleaner body to the power supply unit, comprising a bidirectional thyristor connected to the power line and a control signal output unit for outputting a control signal to the bidirectional thyristor in the cleaner body. A main body control unit for controlling
A vacuum cleaner provided with a control unit for controlling the operation unit based on an AC voltage waveform controlled by the main body control unit in the communication pipe,
A vacuum cleaner, wherein a load that consumes power from the vacuum cleaner body to the power supply unit is connected to the power line in a non-operating state of the operation unit. A vacuum cleaner body provided with an electric blower, a communication pipe connected to the vacuum cleaner body and provided with a power line, a suction port body connected to the communication pipe and sucking dust by the operation of the electric blower, and the suction port A power supply unit that is provided on the body and supplied with power by applying an AC voltage from the cleaner body through the power line, and an operation unit that is provided on the suction port body and operates by the power supply unit,
An AC voltage waveform applied from the cleaner body to the power supply unit, comprising a bidirectional thyristor connected to the power line and a control signal output unit for outputting a control signal to the bidirectional thyristor in the cleaner body. A main body control unit for controlling
A vacuum cleaner provided with a control unit for controlling the operation unit based on an AC voltage waveform controlled by the main body control unit in the suction port body,
The control signal output unit continues to substantially output the control signal from the time when the control signal rises until the time when the AC voltage waveform reaches the next zero cross point in a non-operating state of the operation unit. Electric vacuum cleaner. A vacuum cleaner main body provided with an electric blower, a communication pipe connected to the vacuum cleaner main body and provided with a power line, a suction port connected to the communication pipe and sucking dust by operation of the electric blower, and the communication pipe And a power supply unit to which power is supplied by applying an AC voltage from the vacuum cleaner body via the power line, and an operation unit that is provided in the communication pipe and operates by the power supply unit,
An AC voltage waveform applied from the cleaner body to the power supply unit, comprising a bidirectional thyristor connected to the power line and a control signal output unit for outputting a control signal to the bidirectional thyristor in the cleaner body. A main body control unit for controlling
A vacuum cleaner provided with a control unit for controlling the operation unit based on an AC voltage waveform controlled by the main body control unit in the communication pipe,
The control signal output unit continues to substantially output the control signal from the time when the control signal rises until the time when the AC voltage waveform reaches the next zero cross point in a non-operating state of the operation unit. Electric vacuum cleaner.

Images