JPH0616744B2 - Central vacuum cleaner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a central type vacuum cleaner.

2. Description of the Related Art Generally, the configuration and circuit configuration of a central type vacuum cleaner are as shown in FIGS. 4 and 5. That is,
The vacuum cleaner main body 100 has a fan motor 102, a control circuit 103, and a filter 101 for filtering the sucked dust built therein, and is installed outdoors or in a staged state, and has a suction port for sucking the dust.
104 is connected to the hose insertion ports 111, 112, 113 of each room via a pipe 105, the hose 122 of the hose unit 120 is connected to one of the hose insertion ports 111, 112, 113, and the extension pipes 131, 132 are further provided at the tip of the hose unit 120. The floor nozzle 140 is connected via the. The conductive wire 106 from the hose insertion ports 111, 112, 113 is arranged along the pipe 105 and is connected in parallel to the control circuit 103 in the main body 100. Further, the exhaust port 107 is provided in the main body 100 so as to exhaust the air outdoors or under the floor of the house. When the user turns on the hand switch 121 of the hose unit 120, the control circuit 103 drives the fan motor 102, the floor nozzle 140, the extension pipes 132 and 131, the hose unit 120, and the hose insertion ports 111 and 11.
2,113, suction the dust through the intake port 104 through the pipe 105,
It is to clean. A piano wire embedded in the hose 122 also as a shape retainer is used as a signal line for transmitting that the hand switch 121 is turned on.

By the way, in recent years, the demand for carpet cleaning has become strong due to the remarkable change in living environment, and the suction power has become stronger. However, in that case, it becomes difficult to clean a place such as a curtain or a floor where the suction force is small, which is easy to clean. For this reason, a leak hole 123 is provided in a part of the hose unit 120, and the degree of throttling of this leak 123 is adjusted by the throttle valve 124.
The strength of the suction force is set by adjusting with and adjusting the air volume appropriately.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional configuration, noise is increased due to the wind noise from the throttle valve 124, and it is not possible to fully utilize the "quietness" which is one of the features of the central type vacuum cleaner. . Furthermore, the vacuum cleaner body 100 and the hose outlets 111, 112, 113
Since the pressure loss of the pipe 105 differs depending on the distance between the pipe and the pressure loss depending on the length of the hose, the throttle valve 124 of the hose unit 120 cannot fully throttle it, and it is difficult to clean the curtain, floor, etc. Had problems with sound and cleaning performance.

The present invention solves the above problems, and an object of the present invention is to provide a central type vacuum cleaner that can easily adjust the strength of the suction force without using a throttle valve and is stable against noise. is there.

A further object of the present invention is to provide a central type vacuum cleaner in which the polarity of the wiring connecting the hose unit and the cleaner body can be made non-polar.

Means for Solving the Problems The central type vacuum cleaner of the present invention for solving the above-mentioned conventional problems includes a hose insertion port that communicates the hose unit and the suction port of the vacuum cleaner body through a pipe. A central type vacuum cleaner, wherein the hose unit includes an input setting unit that sets an input of a fan motor, a frequency conversion unit that receives an output signal of the input setting unit and converts the output signal into a frequency corresponding thereto, and the input setting unit. And a frequency conversion unit, which has a built-in DC power supply unit for applying an operating voltage, and the cleaner body is turned on / off according to a signal from the frequency conversion unit.
ON / OF from this optical coupling element section
A voltage conversion unit that converts an F frequency signal into a voltage, a phase control unit that converts a voltage signal from the voltage conversion unit into a conduction angle and drives a fan motor, and an insulating transformer are built in, and the hose insertion port is a hose. When the unit is inserted, the frequency conversion section and the DC power source generation section of the hose unit are connected to the optical coupling element of the cleaner body and the secondary side of the insulation transformer, respectively, and the optical coupling element section emits two pairs of light. It is composed of a coupling element.

Operation With the above configuration, the signal set by the input setting section is converted into a frequency by the frequency conversion section, transmitted to the cleaner body by the conductive wire embedded in the hose unit, and the frequency is waveform-shaped by the optical coupling element section. The signal is converted to a voltage by the voltage converter and then converted to a conduction angle by the phase controller to drive the fan motor, so that the strength of the suction force can be easily adjusted without using a throttle valve in a central cleaner. And moreover,
The optical coupling element section eliminates the influence of induction and noise and enables extremely stable operation.

In addition, the hose unit and the cleaner body are connected by multiple pairs of wiring, but by using the optical coupling element section and the insulating transformer, the polarity of each pair of wiring can be made non-polar, which is troublesome for construction. By reducing the output voltage of the secondary side of the insulation transformer to AC36V or less, it is possible for a person who does not have a diploma under the Electrician Act to easily perform wiring.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, the basics of the present invention will be described with reference to FIGS. 1 and 2. In FIG. 1, reference numeral 1 is an input setting unit for setting the suction force. In this embodiment, a variable resistor 5 is used to
When the suction force is set weak, the resistance is high, and when it is strongly set, the resistance is low. 2 is the input setting section 1
It is a frequency conversion unit that converts the resistance value signal input from the IC into a frequency signal by the frequency conversion IC 3, and in this embodiment, the frequency is always set to 1 KHz or higher, which is higher than the commercial frequency (50 Hz or 60 Hz). Therefore, the output frequency is inversely proportional to the resistance value such that the high frequency has a low frequency and the low resistance has a high frequency. The input setting unit 1 and the frequency conversion unit 2 are built in the hose unit 10. In this way, the frequency signal output from the frequency conversion unit 2 is transmitted from the conductive wire embedded in the hose unit 10 to the cleaner body 40 via the hose insertion port 50. 25 is O according to the frequency signal of the frequency converter 2.
This is an optical coupling element portion that repeats N / OFF, and in this embodiment, a light emitting diode and a phototransistor are used.
Reference numeral 21 is a voltage conversion unit for converting the output frequency signal of the optical coupling element unit 25 into a DC voltage. In the present embodiment, a frequency / voltage conversion dedicated IC 22 is used to provide a low voltage at a low frequency and a high voltage at a high frequency. Is configured to be. 23 is the voltage converter 21
Of the phase control IC 24 for converting the output voltage of the phase control circuit into a conduction angle and driving the fan motor 30.
Is used so that the output voltage of the voltage converter 21 has a small conduction angle when the voltage is low and a large conduction angle when the voltage is high. These optical coupling element section 25, voltage conversion section 21, phase control section
23 and fan motor 30 are built into the cleaner body 40,
It is installed outdoors or under the stairs. The cleaner body 40 is wired up to the insertion port 50 of each room, and the user inserts the hose unit 10 into the hose insertion port 50 for use.

Next, the operation will be described with reference to FIG. When the user wants to clean the curtain or the like, if the input setting is the curtain, that is, the resistance is high, the low frequency signal is output from the frequency conversion unit 2. This signal is a hose unit
Vacuum cleaner body from the conductive wire in 10 via the hose outlet 50
Transmitted to 40. The optical coupling element section 25 in the cleaner body 40 transmits a frequency signal synchronized with ON / OFF of the frequency conversion section 2 to the voltage conversion section 21. It goes without saying that the optical coupling element 25 performs a kind of waveform shaping here. Now, the voltage converter 21 outputs a low voltage corresponding to the low-frequency signal, and the phase controller 23 drives the fan motor 30 with a small conduction angle corresponding thereto, so that the suction force becomes weak.

On the other hand, if you want to clean the carpet, etc., if you set the carpet to the input setting, that is, if the resistance is low, a high-frequency signal is output from the frequency conversion unit 2, and the high voltage is output from the voltage conversion unit 21 via the optical coupling element unit 25. And the phase control unit 23 drives the fan motor 30 with a large conduction angle corresponding to
The suction force can be increased.

When the hose unit 10 is not inserted, the input terminal of the optical coupling element section 25 is in the open state,
Since there is no energy that can drive the optical coupling element unit 25 due to induction or noise from the home / indoor wiring, it is stable against noise.

FIG. 3 shows a circuit of an embodiment of the present invention. In FIG. 3, the same operations as those in FIG. 1 will be described using the same reference numerals. In FIG. 3, reference numeral 1 denotes an input setting unit for setting the suction force, and in this embodiment, the variable resistor 5
When the suction force is set weak, the resistance is high, and when the suction force is set strong, the resistance is low. Reference numeral 2 is a frequency conversion unit that converts the resistance value signal input from the input setting unit 1 into a frequency signal by the frequency conversion IC 3, and in this embodiment, the frequency is always higher than the commercial frequency (50 Hz or 60 Hz) and is 1 KHz or higher. The output frequency is inversely proportional to the resistance value such that the resistance value is low when the resistance is high and high when the resistance is low.
Reference numeral 4 denotes a DC power supply unit that supplies the operating voltage of the input setting unit 1 and the frequency conversion unit 2, and is configured to be connected to a secondary output terminal of an insulation transformer 27 described later. The input setting unit 1, the frequency conversion unit 2 and the DC power supply unit 4 are built in the hose unit 10. The frequency signal output from the frequency conversion unit 2 is transmitted to the cleaner body 40 from the conductive wire embedded in the hose unit 10 via the hose insertion port 50. 26 is ON / O according to the frequency signal of the frequency conversion unit 2.
This is an optical coupling element part that performs FF. In this embodiment, two pairs of a light emitting diode and a phototransistor are used to make the wiring nonpolar. Reference numeral 21 is a voltage conversion unit for converting the output frequency signal of the optical coupling element unit 26 into a DC voltage. In the present embodiment, a dedicated frequency / voltage conversion IC 22 is used to provide a low voltage at a low frequency and a high voltage at a high frequency. Is configured to be.
Reference numeral 23 denotes a phase control unit that converts the output voltage of the voltage conversion unit 21 into a conduction angle and drives the fan motor 30. In this embodiment, the output voltage of the voltage conversion unit 21 is reduced by using the phase control IC 24. When the voltage is high, the conduction angle is small, and when the voltage is high, the conduction angle is large. Reference numeral 27 is an insulating transformer for supplying power to the hose unit 10, and in this embodiment, it is set so that the secondary side output voltage is AC33V. The optical coupling element section 26, the voltage conversion section 21, the phase control section 23, the fan motor 30 and the transformer 27 are built in the cleaner body 40 and installed outdoors or under stairs. The vacuum cleaner body 40 is wired up to the hose insertion port 50 in each room, and the user inserts the hose unit 10 into the hose insertion port 50 for use.

The operation is the same as that of the previous embodiment, and will be described with reference to FIG. When the user wants to clean the curtain or the like, if the input setting is the curtain, that is, the resistance is high, the low frequency signal is output from the frequency conversion unit 2. This signal is sent from the conductive wire in the hose unit 10 to the hose insertion port 50.
Is transmitted to the vacuum cleaner body 40 via. One of the two light emitting diodes of the optical coupling element section 26 in the cleaner body 40 is turned ON / O in synchronization with ON / OFF of the frequency conversion section 2.
FF is performed, and the phototransistor corresponding to this is turned on / off in synchronization with it. In this way the optical coupling element section
The frequency signal passing through one of the 26 is transmitted to the voltage conversion unit 21 as a low frequency signal, a low voltage corresponding to the low frequency signal is output, and the phase control unit 23 operates the fan motor 30 with a small conduction angle corresponding thereto. Since it is driven, the suction force becomes weak.

On the other hand, if you want to clean the carpet, etc., if you set the input setting to the carpet, that is, the resistance is low, a high frequency signal is output from the frequency conversion unit 2 and voltage conversion is performed via either one of the optical coupling element units 26. Converted to high voltage in part 21,
The phase control unit 23 adjusts the fan motor 30 with a large conduction angle accordingly.
The suction port can be strengthened because it is driven.

As described in the related art, generally, a plurality of outlets are provided, and it is desirable that the polarity of the plurality of wirings is as small as possible due to the construction.

Although four wires are used in this embodiment, two wires are the secondary output of the isolation transformer 27 and the other two wires are the output of the frequency conversion unit 2 to two pairs of light emitting diodes and phototransistors. It is intended for transmission, which makes it possible to eliminate polarity in each pair. Therefore, the troublesomeness of the construction can be reduced.

In addition, the secondary side output voltage of the transformer 27 is A of 36 V AC or less.
Since it is C33V, the DC power supply unit 4 also has an AC36V or less, and even a person who does not have a diploma under the Electrical Construction Act can easily perform wiring work.

Further, when the hose unit 10 is not inserted, the input terminal of the optical coupling element section 26 is in an open state, but there is no energy to drive the optical coupling element section 26 due to noise or induction from household wiring. Therefore, there is no malfunction.

EFFECTS OF THE INVENTION As described above, according to the present invention, the signal set by the input setting unit is converted into a frequency by the frequency conversion unit, and the electric wire embedded in the hose unit is passed through the hose insertion port to be the vacuum cleaner. The optical coupling element that is transmitted to the main body and installed in the main body of the vacuum cleaner is turned on in synchronization with the frequency signal from the hose unit.
By repeating ON / OFF, the waveform is shaped, the voltage converter accurately converts the voltage, and the phase controller converts the conduction angle into the conduction angle to drive the fan motor. The strength of the suction force can be easily adjusted without using. In addition, since the induction and noise generated in the optical coupling element do not have enough energy to drive the optical coupling element, the induction and noise can be prevented from being transmitted to the cleaner body side.

Further, according to the present invention, similarly to the above, in the central type, the strength of the suction force can be easily adjusted without using the throttle valve, and the malfunction due to noise is eliminated.

Furthermore, since the secondary side output of the insulation transformer and two pairs of optical elements are wired between the cleaner body and the hose unit, each pair can be made non-polar, and if the output voltage of the insulation transformer is AC36V or less, wiring is possible. The restrictions on workability can be significantly reduced, and workability can be improved. Furthermore, since the transformer is an insulation type, there is no danger of electric shock to the human body even if an abnormality occurs.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a central type vacuum cleaner showing a basic configuration of the present invention, FIG. 2 is a waveform diagram of essential parts for explaining the operation of FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a circuit diagram of a central type vacuum cleaner, FIG. 4 is a configuration diagram of a conventional central type vacuum cleaner, and FIG. 5 is a circuit diagram of the conventional central type vacuum cleaner. 1 ... Input setting section, 2 ... Frequency conversion section, 4 ... DC power supply generation section, 5 ... Variable resistor, 10 ... Hose unit,
21 …… Voltage converter, 23 …… Phase controller, 25,26 …… Optical coupling element, 27 …… Insulation transformer, 30 …… Fan motor, 40
…… Vacuum cleaner body, 50 …… Hose outlet.

Claims (1)

[Claims] 1. A central type vacuum cleaner having a hose insertion port for communicating a hose unit with a suction port of a cleaner body through a pipe, wherein the hose unit sets an input of a fan motor. The cleaning unit includes an input setting unit, a frequency conversion unit that receives an output signal of the input setting unit and converts the output signal into a frequency corresponding thereto, and a DC power supply generation unit that applies an operating voltage to the input setting unit and the frequency conversion unit. The machine body is turned on / off according to the signal from the frequency converter.
ON / OF from this optical coupling element section
A voltage conversion unit that converts an F frequency signal into a voltage, a phase control unit that converts a voltage signal from the voltage conversion unit into a conduction angle and drives a fan motor, and an insulating transformer are built in, and the hose insertion port is a hose. When the unit is inserted, the frequency conversion section and the DC power source generation section of the hose unit are connected to the optical coupling element of the cleaner body and the secondary side of the insulation transformer, respectively, and the optical coupling element section emits two pairs of light. Central type vacuum cleaner composed of coupling elements.