JPH06339441A - Central cleaner - Google Patents

Abstract

PURPOSE:To reduce the number of wires leading from a main body to each outlet so as to enhance the properties of a central cleaner regarding its construction work by providing the main body including a fan motor with a signal receiving portion and an information transmitting portion, and providing a power receiving portion, the signal receiving portion and the information transmitting portion on the side of an at-hand hose. CONSTITUTION:A central cleaner main body 1 which collects dust by exerting a sucking force generated by a fan motor 12 on a hose outlet 2 provided in the wall or floor of each room is provided with an AC power transmitting portion 15 for supplying power to an at-hand hose 4 which can be connected to each hose outlet 2, a main body signal receiving portion 19 for receiving and demodulating signals superimposed on a feeder line 9, a main body control portion 11 for determining the power supply to the fan motor 12, and a main body information transmitting portion 18 for modulating information from the control portion 11 and for superimposing it on the feeder line 9. The at-hand hose 4 is provided with an at-hand control portion 21, a power receiving portion 24 for receiving power from the transmitting portion 15 via the feeder line 9, a signal receiving portion 29 for receiving the signals which are modulated at high frequencies and superimposed on the feeder line 9, and an information transmitting portion 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central cleaner for cleaning by connecting a hose to an insertion port arranged in advance on a wall or floor of each room.

[0002]

2. Description of the Related Art The structure of a conventional central cleaner will be described with reference to FIGS. In FIG. 12, 101 is a central cleaner main body. 10
2a and 102b are outlets for hoses attached to the wall or floor of each room, and also have terminals for connecting each signal line of the wiring cable from the main body and each signal line in the hand hose. Reference numeral 103 is a pipe for sending the dust sucked into the main body 101 from the insertion ports 102a and 102b. 10
Reference numeral 4 is a hand hose inserted by the user into the insertion port 102a. The hand hose 104 includes an operation unit 105 operated by a user, a floor nozzle 106 as a dust suction port, and a bellows hose 107 having a relay power supply line that connects a terminal of the insertion port 102 to an internal circuit of the hand hose 104. An extension space 108 having a relay power supply line is used between the bellows hose 107 and the floor nozzle 106. 10
Reference numeral 9 denotes a cable having three pairs of electric wires, which is connected to the main body 101 and the insertion ports 102a and 102b. FIG. 13 is a circuit diagram of the main body 101 and the hand hose 104. Reference numeral 110 denotes a fan motor, which is a power control unit 111b.
The power supply is controlled by the. Reference numeral 111a denotes a main body control unit, which detects a signal from the first pair 109a of the cable 109 and outputs a power supply power control signal to the power control unit 111b. 112 is a commercial power supply. Reference numeral 113 is the second pair of cables 109b of the cable 109 for reducing the commercial power supply to 30V.
It is a power transmission unit that transmits power to. Reference numeral 114 denotes a dust collection chamber, which is a place for collecting sucked dust. A dust full detection unit 115 detects that the dust collection chamber is full of dust, and its output is connected to the main body control unit 111a.

Reference numeral 117 denotes a slide volume attached to the operation unit 105, and one end of the fixed terminal 117b is connected to the 5V output of the power supply unit 116 and the other end 117c of the fixed terminal.
Are connected to a common line for the output of the power supply unit 116.
The sliding portion 117 a of the slide volume 117 is connected to the input of the voltage control oscillator 118. Reference numeral 119 denotes a power nozzle motor provided in the floor nozzle 106, and on / off of rotation is controlled by opening / closing a switch 120 of the operation unit 105. A light emitting diode 121 is attached to the insertion port 102 so that a person can easily recognize it. The main body control unit 111a closes the switch element 105a by the detection output of the dust full detection unit 115 of the main body 101, and the light emitting diode 121 attached to the insertion port 102 through the third pair 109c of the cable 109.
Light up. Reference numeral 122 is a diode that prevents a reverse voltage from being applied to the light emitting diode 121. Reference numeral 123 is a resistor that limits the current flowing through the light emitting diode 121 and the diode 122. Reference numeral 116 denotes a power supply unit for supplying power to the circuit of the hand hose 104, which converts the power received from the power transmission unit 113 of the main body 101 from the second pair 109b through the insertion port 102 to 5 V DC and supplies the power to the circuit. The second
The power line from the pair 109b is the power nozzle motor 11
9 and a switch 120 connected in series. The output of the voltage control transmitter 118 of the hand hose 104 is connected to the third 1-to-109c via the insertion port 102 and the main body 1
01 is connected to the input of the power control unit 111.

Next, the operation will be described. Hand hose 1
04, the slide volume 117 of the operation unit 105
It is assumed that the sliding part 117a is initially on the fixed terminal 117c side and no voltage is applied to the input of the voltage control oscillator 118, so that no high frequency signal is transmitted. At this time, the main body control unit 111a of the main body 101 cannot detect a high frequency signal, and thus does not output a signal to the power control unit 111b. Next, when the user operates the slide volume 117 to move the sliding portion 117a to the fixed terminal 117b side, the voltage increases from 0V. Therefore, the voltage control oscillator 118 transmits a frequency proportional to the input voltage. As a result, the main body control unit 111a detects the high frequency signal and outputs a signal instructing the fan motor drive power according to the frequency to the power control unit 111b, and the fan motor 110 is supplied with a constant power. That is,
When the slide volume 117 is operated to increase the input voltage of the voltage frequency conversion unit, the oscillation frequency increases, and the main body control unit 111a receiving this signal supplies a signal that supplies more power as the reception frequency increases. Control unit 11
Instruct 1b to increase the power supplied to the fan motor 110 and increase the suction force. Further, when the switch 120 of the operation unit 105 is closed, the power transmission unit 113 of the main body 101 moves to the cable 10
Electric power is sent through the connection terminal of 9b and the insertion port 102 to rotate the power nozzle motor 119. Further, when the dust full detection unit of the main body 101 detects that the dust in the dust collection chamber 114 is full, a DC voltage is output to the cable 109c and the light emitting diode 121 attached to the insertion port 102 is turned on to the user. Inform them that the garbage is full.

[0005]

In such a conventional central cleaner, the main body 101 and the respective insertion ports 10 are inserted.
The number of wires to 2a and 102b was large and the workability was very poor. In addition, the number of electric wires in the bellows hose 107 cannot be increased by 4 or more due to the weight, so that the garbage full signal cannot be displayed on the hand operation unit 105. Further, the main body control unit 111a cannot control suction force with good responsiveness unless the signal from the hand hose 104 is constantly monitored.

Then, in order to reduce the number of cables, the power nozzle motor 119 is provided with a power supply unit and a power receiving unit for superimposing a control signal on the power nozzle motor 119, a power nozzle unit that does not affect the transmission / reception signal due to noise, and the transmission / reception signal. There was no power transmission unit or power reception unit that would not affect the

The present invention is intended to solve the above-mentioned problems. It is possible to reduce the number of wires from the main body to each insertion port to improve the workability, display the garbage full at hand, and control the suction force with good responsiveness. It has the first purpose.

Further, in order to reduce the logarithm of the cable, a central cleaner having a transmitter for supplying power to the power nozzle motor and superimposing a control signal is constructed.
The purpose is.

A third object of the present invention is to construct a central cleaner having a receiver for receiving a control signal superimposed on a power supply line to the power nozzle motor in order to reduce the number of cables.

A fourth object is to construct a central cleaner having a receiver having a function of detecting that the received signal is correct.

A fifth object of the present invention is to construct a central cleaner having a receiver for detecting an abnormality in the transmission frequency of the main body or the hand.

A sixth object of the present invention is to construct a central cleaner having a power transmission section that does not affect the superimposed control signal.

A seventh object of the present invention is to construct a central cleaner having a power receiving section that does not affect the superimposed control signal.

An eighth object of the present invention is to construct a central cleaner having a floor nozzle that does not affect the control signal that is superimposed due to the noise of the power nozzle motor.

[0015]

In order to achieve the first object, the central cleaner of the first invention is a main body which is connected to the main body via a pipe and a main body for generating a suction force and further collecting the sucked dust. From the AC power transmission unit of the main body, which has a plurality of insertion ports installed on a wall, floor, etc., having terminals for connecting the pair of power supply lines from the power supply line to the power supply line inside the inserted hose. It consists of a pair of power supply wires wired to each insertion port, and a hand hose that is detachably attached to the insertion port. The main body has a dust collection chamber for collecting the dust sucked from the piping, and the dust collection chamber. A full-dust detector that detects that the battery is full, a fan motor that generates a suction force, an AC power transmission unit that supplies AC power to the hand hose through the pair of power supply lines, and a high frequency Modulated by The main body signal receiving unit that receives the signal superimposed on the power supply line and demodulates it into digital information, the main body control unit that determines the power supplied to the fan motor by the received digital information, and the signal from the main body control unit. A power control unit that controls the power supplied to the fan motor, a main body information transmission unit that modulates digital information from the main body control unit with a high frequency and superimposes it on the one pair of power supply lines, and the one pair of power supply lines. It consists of a main body zero volt detection unit that detects the phase of the AC power source that is transmitting to the main body control unit, and the main body control unit transmits and receives information to and from the hose in hand in synchronization with the signal from the main body zero volt detection unit. The hand hose receives the operation for turning on / off the fan motor of the main body and adjusting the suction force and transmits this operation signal to the hand control section. An operating unit, a display unit for displaying a signal indicating an operating state and fullness of dust in the dust collecting chamber of the main body by the hand controller, and an AC power transmission of the main body via the pair of power supply lines. An AC power receiving unit for receiving power from a unit, a hand signal receiving unit for receiving a signal modulated at a high frequency and superimposed on the pair of power supply lines, demodulating it into digital information, and inputting it to the hand controlling unit; and the hand controlling unit. Information transmission unit that modulates digital information from the device with a high frequency and superimposes it on the pair of power supply lines, a handy zero-volt detection unit that detects the received AC power supply phase and inputs it to the handy control unit, and a floor that sucks dust A nozzle, a power nozzle motor attached to the floor nozzle for rotating a rotary brush that strikes the floor surface, and a power nozzle for controlling the rotation of the power nozzle motor by a control signal from the hand control unit. The hand controller controls transmission / reception of information to / from the main body in synchronization with a signal from the hand zero volt detector.

In order to achieve the second object, the central cleaner of the second invention uses a basic clock and a value specified from the outside as an initial value for the basic clock in the main body information transmitting section and the hand information transmitting section. A counter that counts the output pulse signal, a frequency divider that divides the overflow output of this counter, a buffer amplifier that sends the output of this frequency divider to the power supply line, and an output signal of this buffer amplifier The counter is provided with a low-pass filter for suppressing harmonic components, and the counter reads an initial count value from the outside each time an overflow is output, and the initial count value of the counter is determined by the output from the main body control unit or the hand control unit. It is a thing.

In order to achieve the third object, the central cleaner of the third invention comprises a high-pass filter for extracting a high-frequency signal component superimposed on a power feed line in a main body signal receiving section and a local signal receiving section, and A phase-locked loop unit that functions to cause the frequency of the self-oscillation signal to follow the frequency of the output signal of the high-pass filter, and a voltage comparator that compares the output of this phase-locked loop unit with a reference voltage and outputs the result, The phase-locked loop section compares the phase of the high-frequency signal received from the power supply line with the phase of its own oscillation signal, the low-pass filter that integrates the output of this phase comparator, and the frequency proportional to the output voltage of this low-pass filter. Of the low-pass filter, and the output of the low-pass filter is As the output of the-locked-loop portion is intended to be input to the voltage comparator.

In order to achieve the fourth object, the central cleaner of the fourth invention comprises a plurality of auxiliary voltage comparators for comparing the output of the low pass filter of the phase locked loop section with another reference voltage of two or more values. The output signal of the auxiliary voltage comparator determines whether or not the signal received from the power supply line by the main body control unit or the hand control unit is correct.

To achieve the fifth object, in the central cleaner of the fifth invention, the main body control section or the hand control section is constituted by a microcomputer having an AD converter, and the output of the low pass filter of the phase locked loop section is provided. By connecting to the AD converter input port, the main body control unit or the hand control unit recognizes the difference between the frequency of the signal received from the power supply line and its own transmission frequency.

In order to achieve the sixth object, the central cleaner of the sixth invention is connected to an AC power transmission unit so as to short-circuit a transformer for stepping down and outputting commercial power. Connected to the power supply line side of this parallel resonance circuit, a plurality of series resonance circuits composed of the coil and the capacitor, a parallel resonance circuit composed of the coil and the capacitor connected in series between the output of the transformer and the power supply line side. A plurality of series resonant circuits resonate at at least two frequencies f1 and f2, the parallel resonant circuit resonates at an intermediate frequency between f1 and f2, and the low pass filter is A capacitor is arranged on the transformer side and a coil is arranged on the feeder line side.

In order to achieve the seventh object, the central cleaner of the seventh invention is such that an AC power receiving section has a rectifier for rectifying an AC voltage received from a power supply line and a stabilized power source section for producing a stable DC voltage. And a power storage unit that stores the voltage of the stabilized power supply, a switching element provided at the input of the rectifier, and a resistor connected in parallel with the switching element, and the hand control unit outputs the transmission signal. The switching element is made conductive only when.

In order to achieve the eighth object, the central cleaner of the eighth invention is a DC nozzle driven power nozzle motor for rotating a rotary brush around a floor nozzle, a rectifier for rectifying an AC voltage, and a power supply line. And a low-pass filter inserted between the rectifier and the rectifier. This low-pass filter has a choke coil on the side of the power feed line.

[0023]

According to the first aspect of the present invention, with the above-mentioned configuration, the number of wires from the main body to each insertion port is reduced to improve the workability, the garbage full display is displayed at hand, and the suction force can be controlled with good responsiveness. .

According to the second aspect of the present invention, the control signal can be superposed on the power supply line to the power nozzle motor in order to reduce the number of cables in the above configuration.

The third aspect of the present invention is capable of receiving the control signal superimposed on the power supply line to the power nozzle motor in order to reduce the number of cables in the above configuration.

According to the fourth aspect of the present invention, it is possible to detect whether or not the received signal is correct by the above-mentioned configuration.

The fifth aspect of the present invention is capable of detecting an abnormality in the transmission frequency of the main body or the hand with the above configuration.

According to the sixth aspect of the invention, with the above-described configuration, power can be transmitted to the hand hose without affecting the superimposed control signal.

The seventh aspect of the present invention is capable of receiving electric power without affecting the superimposed control signal by the above-mentioned configuration.

The eighth aspect of the present invention is capable of driving the power nozzle so as not to affect the superimposed control signal by the above configuration.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the first invention is shown in FIG.
This will be described with reference to FIGS. 2 and 3.

In FIG. 1, reference numeral 1 is a central cleaner body. Reference numerals 2a and 2b are outlets of hoses attached to the walls or floors of the rooms, and are provided with terminals for connecting a pair of power supply lines from the main body and a relay power supply line in the bellows hose. Reference numeral 3 is a pipe for sending the dust sucked into the main body 1 from the respective insertion ports 2a, 2b. Reference numeral 4 is a hand hose inserted by the user into the insertion port 2a. The hand hose 4 has an operation section 5 operated by a user, a floor nozzle 6 which is a suction port of dust, and a bellows hose 7. An extension pipe 8 is used between the bellows hose 7 and the floor nozzle 6. . Reference numeral 9 denotes a pair of power supply lines, which are connected to the main body 1 and the respective insertion ports 2a and 2b. Reference numeral 10 is a dust collection chamber for collecting the sucked dust. FIG. 2 is a circuit configuration diagram of the main body 1 and the hand hose 4. Reference numeral 11 is a main body control unit, 12 is a fan motor, and 13 is an electric power control unit using a triac. The electric power supplied to the fan motor 12 can be varied by phase control. The triac firing pulse signal from the main body control unit 11 causes the fan motor The power supplied to 12 is controlled. 14 is a commercial power supply. 15
Is an AC power transmission unit that steps down the commercial power supply 14 to 30 V and transmits the power to the pair of power supply lines 9. Reference numeral 16 denotes a dust full detection unit for detecting that the dust in the dust collection chamber is full. The detection output of the dust full detection unit 16 is input to the main body control unit 11. Reference numeral 17 denotes a main body zero-volt detection unit, which detects the phase of the AC voltage output by the AC power transmission unit 15 and inputs it to the main body control unit 11. Reference numeral 18 denotes a main body information transmission unit, which modulates the digital information output from the main body control unit 11 with a high frequency and superimposes it on the pair of power supply lines 9. Reference numeral 19 denotes a main body signal receiving unit, which demodulates the high frequency signal superimposed on the pair of power supply lines 9 and inputs it to the main body control unit 11 as digital information.

In the hand hose 4, 21 is a hand control unit, and 22 is a power nozzle motor control unit which controls the rotation of the power nozzle motor 25 of the floor nozzle 6 according to an instruction from the hand control unit 21. When the control unit 21 receives an ON operation of the power nozzle at the operation unit 5, it outputs a signal to the power nozzle motor control unit 22 to supply power to the power nozzle motor 25 and rotate it. Reference numeral 23 denotes a hand zero-volt detector for detecting the phase of the AC voltage received from the pair of power supply lines 9, and the detection output is input to the hand controller 21. Reference numeral 24 denotes a power receiving unit that receives power from a pair of power supply lines 9 to generate a DC stabilized voltage of 5 V and supplies it to a circuit in the hand hose. Reference numeral 26 denotes a display section for displaying an operating state and a full of dust from the main body, which is provided in the immediate vicinity of the operation section 5. Reference numeral 28 is a hand information transmission unit, which modulates the digital information output from the hand control unit 21 at a high frequency and superimposes it on the pair of power supply lines 9. Reference numeral 29 is a hand signal reception unit, which demodulates the high frequency signal superimposed on the pair of power supply lines 9 and inputs it to the hand control unit 21 as digital information. Therefore, the hand control unit 21 and the main body control unit 1
1 is configured to be capable of exchanging various meaningful digital information mutually modulated at a high frequency through a pair of power supply lines 9.

Next, the operation will be described. Figure 3 is the first
FIG. 8 is an operation explanatory view of the embodiment of the invention of FIG. In FIG.
(A) is an AC voltage waveform transmitted by the AC power transmission unit 15 to the power supply line 9. (B) is the main unit zero-volt detector 1
7 and the near zero-volt detector 23 detect the AC power supply phase, and the pulse is output at the timing when the voltage crosses 0V. (C) is an operation signal received by the operation unit 5 of the hand hose 4. When it is stopped, it is turned on, driven with high power, switched to low power, and then stopped. (D) is a high-frequency signal transmitted from the hand control section 21 after being modulated and transmitted by the hand information transmission section 28. The hand control unit 21 transmits every other output signal pulse of the zero volt detection unit 17. Here, 1100 is a code having the meaning of driving the fan motor with high power. When the power is switched to low power, the hand control unit 21 switches the transmission signal to 1010. When the stop operation is further accepted, the hand control unit 21 transmits 1000. (E) is digital information received and demodulated by the main body signal receiving section 19. (F) is a carrier detection signal output when the main body signal receiving unit 19 detects a high frequency signal from the power supply line 9, and is input to the main body control unit 11. The main body control section 11 checks whether or not there is a carrier detection signal after the pulse of the main body zero volt detection section 17, and if there is a carrier detection signal, decodes the received data demodulated by the main body signal reception section 19. (L) is a commercial power supply waveform applied to the fan motor 12. The ignition pulse signal output from the main body control unit 11 controls the waveform of the commercial power supply voltage applied to the fan motor 12. That is, the power supplied to the fan motor 12 is adjusted according to the data received by the main body control unit 11. (G) is an output signal of the dust full detection unit 16 of the main body 1. When the main body control unit 11 receives the signal from the dust full detection unit 16, the main body control unit 11 transmits after the next zero volt detection pulse received from the hand hose 4.
(H) is digital information transmitted by the main body control unit 11, and 0100 is a code meaning that the dust is full. (I)
Is a signal received by the local signal receiving unit 29 from the power feeding line 9 and demodulated. (J) is a carrier detection signal output when the local signal receiving unit 29 detects a high frequency signal from the power supply line 9, and is input to the local control unit 21.
The hand control unit 21 checks whether or not there is a carrier detection signal after the pulse of the zero-volt detection unit 23 at hand, and if there is a carrier detection signal, decodes the reception data demodulated by the hand signal reception unit 29. (K) is a dust full display signal output from the hand control unit 21, and the dust full display is displayed on the display unit 26 of the hand hose 4.

As described above, in the embodiment, the rotation speed of the fan motor 12 is controlled and the suction force is controlled only by wiring the main body 1, the insertion opening 2 and the hand hose 4 with only two non-polar power supply lines. It can be changed, the power nozzle motor 25 can be rotated in the floor nozzle 6, and when the dust in the dust collecting chamber 10 of the main body 1 is full, it can be displayed on the display unit 26 of the hose 4 at hand, and the AC power phase can be changed. Since the information is transmitted and received in synchronization, the main body control unit 11 can easily perform phase control using a triac to control the power of the fan motor 12.

Next, an embodiment of the second invention will be described with reference to FIG. Reference numeral 31 is a basic clock which oscillates 6 MHz. Reference numeral 31a is an input terminal for operating the oscillation operation and stop, and is a main body control unit 11 or a hand control unit 21.
It is connected to the transmission control output terminal of. Reference numeral 32 is a 4-bit binary counter which counts clock pulses of the basic clock 31. The counter 32 can read the values of 32a, 32b, 32c, 32d as the initial value of counting. 32e is an overflow output of the counter 32. 32f is an input for instructing the timing of reading the initial value of the count, and is connected to the overflow output 32e. Therefore, the initial value is read every time the counter 32 overflows. Also counter 3
The 2 overflow output 32e is further divided by 2 by the frequency divider 33 to be converted into a square wave having the same duty of high and low. Here, one input 32a of the counter 32 is connected to the digital information output terminal of the main body control unit 11 or the hand control unit 21. Reference numeral 34 is a buffer amplifier that performs impedance matching in order to superimpose the high frequency signal of the frequency divider 33 on the feeder line 9. Reference numeral 35 is a low-pass filter that suppresses harmonics other than the fundamental frequency, and the clock divided by passing through this low-pass filter becomes a sine wave and is superimposed on the feeder line 9.

Next, the operation will be described. Main body control unit 1
1 or when a transmission signal is output from the hand control unit 21, the control input 31a of the basic clock 31 becomes active and 6M
Start transmitting Hz. The counter 32 counts this 6 MHz clock. When an overflow occurs once, a pulse is generated at 32e, and since this pulse is input to the initial value reading control terminal 32f, at the end of this pulse, the counter 32 has four counters 32a, 32b, 32c and 32d.
Read the bit value. Here, the most significant bit 32d is 0, and the second bit is the main body control unit 11 or the hand control unit 21.
Since it is connected to the transmission data of, it changes to 0 or 1 depending on the transmission data. The third bit 32c is 0 and the least significant bit 32b is 1. Therefore, 0 when the transmission data is 0
Counting up from 001, that is, from 1 in decimal, overflows at the 15th clock, and the initial value is read again. When the transmission data is 1, 0101
That is, the decimal number starts counting up from 5, and overflows at the 11th clock to read the initial value again. As a result, the output 32e of the counter 32 is 1 at 6 MHz.
A clock pulse with a frequency division of 5 or 11 appears. Frequency divider 3
Since 3 is further divided by 4, a signal of 6 MHz divided by 44 or 60, that is, a signal of 137 kHz or 100 kHz appears at this output. That is, when the main body control unit 11 or the hand control unit 21 outputs 1 as transmission data, 137 kHz is output, and when 0 is output as transmission data, 100 kHz is output. The high frequency signal of 100 kHz or 137 kHz of the frequency divider 33 is impedance-matched by the buffer amplifier 34 so as to be superimposed on the power supply line 9, and the low pass filter 35 is used.
As a result, harmonics other than the fundamental frequency are suppressed to form a sine wave, which is superimposed on the feeder line 9.

As described above, in the embodiment, 1
It is possible to configure an information transmitter of a frequency modulation system that switches between two frequencies of 00 kHz and 137 kHz, and configure a central cleaner that superimposes a high frequency signal on a power supply line.

Next, an embodiment of the third invention will be described with reference to FIG. A high-pass filter 40 takes out a high-frequency signal from the power supply line 9 and uses it as a first input of the phase comparator 42. Reference numeral 41 is a phase locked loop unit, which is composed of a phase comparator 42 that outputs a product of two input signals, a low-pass filter 43, and a voltage control oscillator 44. Reference numeral 45 is a reference voltage source, which is connected to the negative input 46a of the voltage comparator 46. The low-pass filter 43 is composed of resistors 47 and 48 and a capacitor 48, and one end of the resistor 47 is connected to the output of the phase comparator 42 and the other end is connected to one end of the resistor 48. The other end of the resistor 48 is connected to one end of a capacitor 49, and the other end of the capacitor 49 is dropped to a common potential. The inputs of the voltage control oscillator 44 are resistors 47 and 48.
Is connected to the output 43b of the low-pass filter 43 which is the connection end of the voltage control oscillator 44, and the output of the voltage control oscillator 44 is connected to the positive input 46b of the phase comparator. The connecting end 43a of the resistor 48 and the capacitor 49 is the integrated output 43a of the low-pass filter 43.
Is connected to the second input 46b of the voltage comparator 46.

Next, the operation will be described. FIG. 6 is an operation explanatory diagram of the embodiment of the third invention. In FIG. 6, (A)
Is the received signal, and (B) is the output of the voltage controlled oscillator 44. In the phase-locked loop unit 41 in this embodiment, the received signal (A) is 0 to the input 43b of the voltage control oscillator 44.
When the oscillation frequency when V is applied is almost the same, it stabilizes in the phase relationship as shown in (A) and (B). The output of the phase comparator 42 at this time, that is, the low-pass filter 43
The input waveform of is like (C). Since the plus and minus components are equal, the integrated output 4 of the low-pass filter 43
3a becomes almost 0V. The waveform when the frequency fa higher than that in (A) is received is (D), and (E) is the output of the voltage control oscillator 44. At this time, the phase is stabilized as shown in (D) and (E). Phase comparator 42 at this time
Output, that is, the input waveform of the low-pass filter 43 is as shown in (F). Since there are more plus components than minus components, the integrated output 43a of the low-pass filter 43 has a plus potential Va as shown in (G). Next, the waveform when the frequency fb lower than (A) is received is (H), and (I) is the output of the voltage control oscillator 44. At this time, the phase relationship shown in (H) and (I) stabilizes. The output of the phase comparator 42 at this time, that is, the input waveform of the low-pass filter 43 is as shown in (J). Since the negative component is more than the positive component, the integrated output 43a of the low pass filter 43 has the negative potential Vb as shown in (K). In the central cleaner of this embodiment, the transmission frequency for data 1 is fa and the transmission frequency for data 0 is f.
Since the reference voltage source 45 of the negative input 46a of the voltage comparator 46 is set to the average value of Va and Vb, the output of the voltage comparator 46 receives the transmission frequency fa at the time of data 1. It sometimes outputs 1 and outputs 0 when the transmission frequency fb when the data is 0 is received. Therefore, the main body control unit 11 or the hand control unit 21 can receive the data of the high frequency signal received from the power supply line by reading the output of the voltage comparator 46.

As described above, in the embodiment, the control signal superimposed on the power supply line to the power nozzle motor can be easily received in order to reduce the number of cables.

Next, an embodiment of the fourth invention will be described with reference to FIG. Since the phase locked loop unit 41 and the voltage comparator 46 are the same as those in FIG. 6, their explanations are omitted. 5
Reference numeral 0 is an auxiliary voltage comparison unit, which is composed of comparators 51 and 52, reference voltage sources 53 and 54, and a logical product unit 55 that ANDs the outputs of the comparators 51 and 52. The output of the logical product 55 becomes the output of the auxiliary voltage comparator 50 and is connected to the input of the main body control unit 11 or the hand control unit 21.

Next, the operation will be described. Similarly to the voltage comparator 46, the input of the auxiliary voltage comparator 50 is the integrated output 43 of the low-pass filter 43 of the phase-locked loop unit 41.
a. The reference voltage source 53 is set to the output voltage Vc of the phase-locked loop unit 41 when the upper limit frequency fc is received with consideration given to the variation in fa, and the reference voltage source 54 is set to the variation in fb. In consideration of the above, the output voltage Vd of the phase locked loop unit 41 when the lower limit frequency fd having a sufficient margin is received is set. At this time, when a signal having a frequency of fa or fb higher than fd and lower than fc is received, the outputs of the voltage comparators 51 and 52 are 1 and the output of the AND gate 55 is 1. However, when a signal having a frequency higher than fc is received, the output of the voltage comparator 46 becomes 1, but the output of the voltage comparator 51 becomes 0, so that the logical product 5
The output of 5 becomes 0. Also, when a signal having a frequency lower than fd is received, the output of the voltage comparator 46 becomes 0, but the output of the voltage comparator 52 becomes 0, so that the logical product 55
Output becomes zero. Therefore, when the output of the auxiliary voltage comparison unit 50 is 0, it can be determined that the output of the voltage comparator 46 is invalid.

As described above, the embodiment can have a function of detecting whether the received signal is valid or invalid.

Next, an embodiment of the fifth invention will be described with reference to FIG. Since the phase locked loop unit 41 and the voltage comparator 46 are the same as those in FIG. 5, their explanations are omitted. 6
Reference numeral 0 is a microcomputer of the main body control unit 11 or the hand control unit 21. Reference numeral 61 denotes an AD converter inside the microcomputer 60, which is a low-pass filter 43 of the phase-locked loop unit 41 through the input port 60a.
The output 43a is input.

Next, the operation will be described. The AD converter 61 can detect the voltage of the integrated output 43a of the low pass filter 43 of the phase locked loop unit 41 as an analog amount. Since the signal transmitted by itself is superimposed on the power supply line 9, the transmission data also enters the signal receiving unit that is also receiving the signal from the power supply line 9. The transmission frequency for data 1 is fa, and the phase-locked loop unit 41 at this time is fa
The integrated output voltage of the low pass filter 43 becomes
The transmission frequency when the data is 0 is fb, and the integrated output voltage of the low-pass filter 43 of the phase-locked loop unit 41 at this time is Vb. Therefore, when the reading by the AD converter when outputting the data 1 is different from Va, or when the reading by the AD converter when outputting the data 0 is different from Vb, the transmission frequency of itself shifts. Can be detected.

As described above, in the embodiment, it is possible to easily detect an abnormality in the transmission frequency of the main body or the hand.

Next, an embodiment of the sixth invention will be described with reference to FIG. In FIG. 9A, reference numeral 69 is a transformer, which lowers the commercial power supply to 30V. Reference numerals 70a and 70b are series resonance circuits including a coil and a capacitor. 71a
Reference numerals 71b are parallel resonance circuits composed of a coil and a capacitor. The series resonance circuits 70a and 70b are connected so as to short-circuit the output of the transformer 69, and the parallel resonance circuits 71a and 71b are inserted in series between the output of the transformer 69 and the power supply line 9. Reference numeral 72 is a low-pass filter, which includes a coil 82 and a capacitor 81 on the side of the power supply line 9.

Next, the operation will be described. The curve (1) in FIG. 9B is the impedance seen from the power supply line 9 by the series resonant circuits 70a and 70b. The curve (2) in FIG. 9B is the impedance seen from the power supply line 9 by the parallel resonant circuits 71a and 71b. The series resonance circuit 70a resonates at the frequency fa, and the series resonance circuit 70b resonates at the frequency fb. Further, the parallel resonance circuits 71a and 71b have fa and fb
Resonates at an intermediate frequency fe. Therefore, the series resonance circuit 7
0a and 70b and the parallel resonant circuits 71a and 71b can suppress the amount of signals of frequencies fa and fb leaking from the power supply line side to the commercial power source side to an extremely low level. Further, the low-pass filter 72 and the parallel resonance circuits 71a and 71b can suppress the ingress of noise having frequencies close to fa and fb from the commercial power supply. Further, since the coil 82 of the low-pass filter 72 is arranged on the side of the power feeding line 9, the high frequency signals fa and fb superimposed on the side of the power feeding line 9 are stored in the capacitor 8.
It is possible to suppress the absorption to 1.

As described above, in the embodiment, the intrusion of noise from the commercial power source is suppressed and the superimposed high frequency signal for control is not disturbed, and the high frequency signal superimposed on the power supply line 9 is supplied to the commercial power source. It will not be leaked to and will not adversely affect other devices and systems.

Next, FIG. 10 shows an embodiment of the seventh invention.
Will be explained. Reference numeral 83 denotes a stabilized power supply circuit, which converts the supplied power to a stabilized power supply of 5 V and supplies it to each part of the circuit. A rectifier 84 rectifies the supplied AC voltage and supplies it to the stabilized power supply 83. Reference numeral 85 denotes a switching element whose opening and closing is controlled by a signal from the transmission control output terminal of the hand control unit 21, which is inserted in series between the power supply line 9 and the rectifier 84. Reference numeral 86 is a resistor, which is connected in parallel with the switching element 85.

Next, the operation will be described. At the time of reception, since there is no signal from the transmission control output terminal of the hand controller 21, the switching element 85 is open and the circuit current is the resistance 86.
Are supplied through. Therefore, the impedance viewed from the power supply line side of the power receiving unit can be raised to the impedance of the resistor 86, and the weak high frequency signal that is superimposed is not absorbed. Further, at the time of transmission, the switching element 85 is closed by a signal from the transmission control output terminal of the hand control unit 21, and a large circuit current can be obtained.

As described above, in the embodiment, at the time of reception, the impedance seen from the power supply line side of the power receiving section can be increased and the weak high frequency signal that is superimposed is not absorbed. Further, since a resistor 86 is short-circuited during transmission when a large amount of circuit current is required, a large amount of circuit current can be taken.

Next, an embodiment of the eighth invention is shown in FIG.
Will be explained. A rectifier 88 rectifies the supplied AC power and supplies it to the power nozzle motor 25. 89
Is a low-pass filter, and includes a coil 90 and a capacitor 91.
It is composed of. A choke coil 92 is inserted in series between the feeder line 9 and the low-pass filter 89.

Next, the operation will be described. When the power nozzle motor 25 is supplied with power and driven, it generates a very high level of noise at both ends. Low pass filter 89
Serves to suppress the high frequency components of this motor noise.
Therefore, the frequency component of the noise of the power nozzle motor appearing on the power supply line 9 is in a frequency band considerably lower than the frequencies of the high frequency signals fa and fb, and thus the high frequency signals fa and f.
The interference given to b can be kept low. Further, since the choke coil 92 is arranged on the side of the power feeding line 9, it is possible to prevent the high frequency signals fa and fb superimposed on the power feeding line 9 from being absorbed by the capacitor 91 of the low pass filter 89.

As described above, in the embodiment, it is possible to use the floor nozzle which does not interfere with the high frequency signal superimposed on the power supply line 9 due to the noise of the power nozzle motor.

[0057]

As is apparent from the above embodiments, the first
According to the invention, it is possible to obtain a central cleaner that reduces the number of wires from the main body to each insertion port to improve the workability, displays the garbage full at hand, and controls the suction force with good responsiveness.

Further, according to the second invention, since the number of cables is reduced, it is possible to obtain the central cleaner having the information transmitting section capable of easily superimposing the control signal on the power supply line to the power nozzle motor.

Further, according to the third aspect of the invention, in order to reduce the number of cables, the central cleaner having the receiving portion for easily receiving the control signal superimposed on the power supply line to the power nozzle motor can be obtained. .

Further, according to the fourth invention, it is possible to obtain the central cleaner having the receiving portion having the function of easily detecting whether the received signal is valid or invalid.

Further, according to the fifth invention, it is possible to obtain a central cleaner having a receiver for detecting an abnormality in the transmission frequency of the main body or the hand.

According to the sixth aspect of the present invention, noise from the commercial power source is prevented from entering and the superimposed high-frequency signal for control is not disturbed, and the high-frequency signal superimposed on the power supply line is commercialized. It is possible to obtain a central cleaner having a power transmission unit that does not leak to the power source and adversely affect other devices and systems.

Further, according to the seventh invention, at the time of reception, the impedance seen from the power supply line side of the power receiving section can be increased and the weak high frequency signal which is superimposed is not absorbed. Further, it is possible to obtain a central cleaner having a power receiving unit capable of taking a large amount of circuit current during transmission, which requires a large amount of circuit current.

According to the eighth aspect of the invention, it is possible to obtain a central cleaner having a floor nozzle which does not interfere with the control signal superimposed by the noise of the power nozzle motor.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a central cleaner showing an embodiment of a first invention.

[Fig. 2] Circuit configuration diagram of the central cleaner

FIG. 3 is an explanatory view of the operation of the central cleaner.

FIG. 4 is a configuration diagram of an information transmission unit of a central cleaner showing an embodiment of the second invention.

FIG. 5 is a configuration diagram of a signal receiving portion of a central cleaner showing an embodiment of a third invention.

FIG. 6 is an operation explanatory view of the central cleaner.

FIG. 7 is a configuration diagram of a signal receiving unit of a central cleaner showing an embodiment of a fourth invention.

FIG. 8 is a configuration diagram of a signal receiving unit of a central cleaner showing an embodiment of the fifth invention.

FIG. 9A is a configuration diagram of an AC power transmission unit of a main body of a central cleaner showing an embodiment of the sixth invention, and FIG. 9B is a characteristic diagram thereof.

FIG. 10 is a configuration diagram of a power receiving unit in a hand hose of a central cleaner showing an embodiment of a seventh invention.

FIG. 11 is a circuit configuration diagram of a floor nozzle of a central cleaner showing an embodiment of the eighth invention.

FIG. 12 is a configuration diagram of a conventional central cleaner.

FIG. 13 is a circuit configuration diagram of a conventional central cleaner.

[Explanation of symbols]

 1, 101 Main body 2, 102 Insertion port 3, 103 Piping 4, 104 Hand hose 5, 105 Operation part 6 Floor nozzle 9 Feed line 11 Main body control part 12, 110 Fan motor 13 Power control part 14 Commercial power supply 15 AC power transmission part 16,115 Garbage full detection unit 17 Main body zero volt detection unit 18 Main body information transmission unit 19 Main body signal reception unit 21 Hand control unit 22 Power nozzle motor control unit 23 Hand zero voltage detection unit 24 Power receiving unit 25 Power nozzle motor 28 Hand information transmission unit 29 Hand signal receiving unit 32 Counter 34 Buffer amplifier 40 High-pass filter 41 Phase-locked loop unit 42 Phase comparator 35, 43, 72, 89 Low-pass filter 44 Voltage control oscillator 46 Voltage comparator 60 Microcomputer 61 AD converter 69 Transformer 7 Series resonant circuit 71 the parallel resonant circuit 83 stabilized power supply 84, 88 rectifier 85 switching element 92 Choke coil

Claims (8)

[Claims] 1. A main body for generating a suction force and further collecting the sucked dust, and a main body connected to the main body via a pipe.
A plurality of insertion ports which have terminals for connecting a pair of power supply lines and a power supply line inside the inserted hose and which are installed on a wall, floor, or the like, and which are wired from the main body to each of the insertion ports It consists of a pair of power supply lines and a hand hose that is detachably attached to the insertion port, and the main body detects the dust collection chamber that collects the dust sucked from the piping and that the dust in this dust collection chamber is full A dust full detection unit, a fan motor that generates a suction force, an AC power transmission unit that supplies AC power to a hand hose through the pair of power supply lines, and a pair of power supplies that are modulated at high frequencies. A main body signal receiving unit that receives the signal superimposed on the electric wire and demodulates it into digital information, a main body control unit that determines the power supplied to the fan motor based on the received digital information, and a front end by a signal from this main body control unit. A power control unit that controls the power supplied to the fan motor, a main body information transmission unit that modulates digital information from the main body control unit with a high frequency and superimposes it on the one pair of power supply lines, and one power supply line. It consists of a main body zero volt detection section that detects the phase of the AC power source that is transmitting power and inputs it to the main body control section, and the main body control section transmits and receives information with the hand hose in synchronization with the signal from the main body zero volt detection section. The hose at hand controls the hand control part, the operation part that receives the operation for turning on / off the fan motor of the main body and adjusts the suction force, and transmits this operation signal to the hand control part, the operating state and the dust collection of the main body. A display unit that receives and displays a signal indicating that the room is full of dust, an AC power receiving unit that receives power from the AC power transmitting unit of the main body through the pair of power supply lines, and a high frequency And a hand signal receiving unit for receiving the signal modulated by the above and superposed on the pair of power supply lines, demodulating it into digital information, and inputting it to the hand controlling unit; and modulating the digital information from the hand controlling unit with a high frequency, A hand information transmitting unit that is superposed on a pair of power supply lines,
Zero-volt detection unit at hand to detect the AC power source phase received and input to the above-mentioned control unit, floor nozzle for sucking dust, power nozzle motor for rotating a rotating brush attached to this floor nozzle, and this, And a power nozzle motor control unit that controls the rotation of the power nozzle motor by a control signal from the hand control unit, and the hand control unit transmits and receives information to and from the main body in synchronization with the signal from the hand zero-volt detection unit. Central cleaner characterized by what it does. 2. The main body information transmission unit and the hand information transmission unit,
The basic clock, a counter that counts the pulse signal of the output of the basic clock with an externally specified value as an initial value, a frequency divider that divides the overflow output of this counter, and the output of this frequency divider Is composed of a buffer amplifier for sending out to the power supply line and a low-pass filter for suppressing the harmonic components of the output signal of this buffer amplifier, and the counter reads the initial value of the count from the outside every time it outputs an overflow, and the counter The central cleaner according to claim 1, wherein the initial value of the count of is determined by the output from the main body control unit or the hand control unit. 3. The main body signal receiving section and the hand signal receiving section,
A high-pass filter for extracting the high-frequency signal component superimposed on the power supply line, a phase-locked loop part that functions to make the frequency of the self-oscillation signal follow the frequency of the output signal of this high-pass filter, and the phase-locked loop part A phase comparator for comparing the phase of the high frequency signal received from the power supply line with the phase of the self-generated signal, and the phase comparator. Of a low-pass filter that integrates the output of the low-pass filter and a voltage-controlled oscillator that emits a signal of a frequency proportional to the output voltage of the low-pass filter and uses it as its own oscillation signal. The central cleaner according to claim 1, wherein the central cleaner is input as an output to the voltage comparator. 4. A plurality of auxiliary voltage comparators for comparing the output of the low-pass filter of the phase-locked loop section with another reference voltage of two or more values, and a main body control section or an output signal of the auxiliary voltage comparators. The central cleaner according to claim 3, wherein the hand control unit determines whether or not the signal received from the power supply line is correct. 5. The main body control unit or the hand control unit is AD
It is composed of a microcomputer with a built-in converter, and the output of the low-pass filter in the phase-locked loop is AD.
4. The central cleaner according to claim 3, wherein the main body control unit or the hand control unit recognizes the difference between the frequency of the signal received from the power supply line and its own transmission frequency by connecting to the converter input port. 6. The AC power transmission unit, a transformer for stepping down and outputting a commercial power source, a plurality of series resonance circuits including a coil and a capacitor connected so as to short-circuit the output of the transformer, and the transformer. Of the parallel resonance circuit including a coil and a capacitor connected in series between the output of the parallel resonance circuit and the power supply line side, and a low-pass filter including a coil and a capacitor connected to the power supply line side of the parallel resonance circuit. The resonant circuit resonates at at least two frequencies, the parallel resonant circuit resonates at an intermediate frequency between the two frequencies, and the low-pass filter has a capacitor on the transformer side and a coil on the feeder line side. A central cleaner according to claim 1. 7. The AC power receiving unit includes a rectifier that rectifies an AC voltage received from a power supply line, a stabilized power source that generates a stable DC voltage, and a power storage unit that stores the voltage of the stabilized power source. A switching element provided at the input of the rectifier, and a resistor connected in parallel with the switching element, wherein the switching element conducts only when the hand control unit outputs a transmission signal. Central cleaner described in 1. 8. The floor nozzle comprises a DC nozzle driving power nozzle motor for rotating a rotary brush, a rectifier for rectifying an AC voltage, and a low-pass filter inserted between the power supply line and the rectifier. The central cleaner according to claim 1, wherein the filter has a choke coil on the feeder line side.