JPH07106192B2 - Central vacuum cleaner - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a central type vacuum cleaner.

2. Description of the Related Art An example of the configuration and circuit configuration of a conventional central type vacuum cleaner will be described with reference to FIGS. That is, the main body 17 incorporating the fan motor 14, the control circuit 15, and the filter 16 that filters the sucked dust is installed outdoors or under the stairs in a stationary state. Then, the suction port 18 side is connected to the hall inlets 19a, 19b, 19c of each room by combining the pipes 20, and the hose unit 2 is connected to any of the hose inlets 19a, 19b, 19c.
Connect 1 Further, the hose unit 21 includes extension pipes 22 and 23 connected to the tips of the hose units 21 and a floor nozzle 24 connected to the tips of the extension pipes 22 and 23. Hose outlets 19a, 19b,
The conductive wire from 19c is connected in parallel to the control circuit 15 in the main body 17. Further, the exhaust port 25 is installed outdoors or under the floor of the house so that the exhaust air is emitted.

When the user turns on the hand switch 26 of the hose unit 21, the control circuit 15 of the main body 17 drives the fan motor 14, and the floor nozzle 24, the extension pipes 22 and 23, the hose unit 21, the hose insertion port 19b, and the pipe 20. The dust is sucked through the suction port 18 and cleaned. A piano wire embedded in the hose 27 also as a shape retainer is used as a signal line for transmitting that the hand switch 26 is turned on.

By the way, in recent years, due to a remarkable change in living environment, demand for carpet cleaning has become strong, and suction power has become strong. However, in that case, it becomes difficult to clean a place such as a curtain or a floor that has a small suction force and is easy to clean. Therefore, a leak hole 28 is provided in a part of the hose unit 21, and the strength of the suction force is set by adjusting the degree of throttle of the hole 28 with a throttle valve 29 to appropriately adjust the air volume.

However, in the above configuration, noise is increased due to the wind noise from the throttle valve 29, and "quietness" which is one of the features of the central type vacuum cleaner cannot be fully utilized. Furthermore, since the pressure loss of the pipe 20 differs depending on the distance between the main body 17 and the hose insertion ports 19a, 19b, 19c, and the pressure loss varies depending on the length of the hose 27, the throttle valve 29 of the hose unit 21 is sufficient. There was a problem with sound and suction power performance of cleaning, such as being unable to squeeze and making it difficult to clean curtains and floors.

Further, since the length of the hose is as long as at least 4 m, a signal loss occurs due to the resistance, and it is difficult to reliably transmit the signal of the hand switch 26 of the hose to the main body 17 and the like.

The present invention aims to solve the above-mentioned problems and to provide a central type vacuum cleaner in which the strength of suction force can be easily adjusted by connecting a hose, an insertion port and a main body, without using a throttle valve. It is a thing.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an input setting unit capable of setting a suction force of a fan motor and a frequency for receiving an output signal of the input setting unit and converting the frequency to a frequency corresponding thereto. A hose having a built-in converter, an amplifier that amplifies a signal from the frequency converter, and an insertion port to which the hose can be inserted and connected, and a connector connected to the insertion port from the amplifier. A voltage conversion unit that converts a frequency signal into a voltage,
A central type vacuum cleaner comprising a main body having a built-in phase controller and a fan motor for converting the voltage signal from the voltage converter into a conduction angle and driving the fan motor.

Operation According to the above configuration, the signal set by the input setting unit provided in the hose is converted into a frequency by the frequency conversion unit, transmitted to the insertion port connected to the hose, amplified, and further transmitted to the main body. In the main body, the frequency signal is converted into a voltage by the voltage conversion unit, which is converted into a conduction angle by the phase control unit, the fan motor is controlled, and the central type vacuum cleaner can be controlled and operated as the suction power is strong or weak. became.

Embodiment Hereinafter, a central type vacuum cleaner which is an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 is a hose, which contains an input setting unit 2 and a frequency conversion unit 3. The input setting unit 2 uses a variable resistor so that the suction force of the fan motor can be set. When the suction force is set weak, the resistance is high, and when it is strongly set, the resistance is low. The frequency conversion unit 3 is an IC for frequency conversion dedicated to the resistance value signal from the input setting unit 2.
Convert to frequency signal by 4. This frequency is inversely proportional to the resistance value, that is, the frequency is low when the resistance is high and high when the resistance is low.

Reference numeral 5 is an insertion port, and a frequency signal is transmitted by inserting and connecting the hose 1, but this signal is attenuated by the resistance value of the conductor wire embedded in the hose 1. Reference numeral 6 denotes an amplifier, which is an amplifier for amplifying the attenuated frequency signal from the frequency converter 3 and transmitting it to the main body. In this embodiment, a comparator 7 is used and a little hysteresis is applied. Reference numeral 8 is a main body, and 9 is a voltage converter, which converts the output frequency signal from the amplifier 6 into a DC voltage. In this embodiment, the frequency / voltage conversion IC 10 is used to set the voltage to a low voltage at a low frequency and the voltage to a high voltage at a high frequency. A phase controller 11 converts the output voltage of the voltage converter 9 into a conduction angle and drives the fan motor 12. In this embodiment, the phase control IC 13 is used to set the output voltage of the voltage conversion unit 9 to have a small conduction angle when the voltage is low and a large conduction angle when the voltage is high. The main body 8 incorporates the voltage conversion unit 9, the phase control unit 11 and the fan motor 12, and is installed outdoors or under stairs. The main body 8 is wired to the outlet 5 of each room, and the user inserts the hose 1 into the outlet 5.
Use by inserting into.

Now, when the user wants to clean the curtain or the like, when the input setting is the curtain, that is, the resistance is high, a low frequency signal is transmitted from the frequency conversion unit 3 through the lead wire in the hose 1 and the amplification unit 6 in the insertion port 5 is connected. The voltage converter 9 in the main body 8 is amplified by
Be transmitted to. The voltage converter 9 outputs a low voltage corresponding to the low frequency signal, and the phase controller 11 drives the fan motor 12 with a small conduction angle corresponding to the low voltage, so that the suction force is weak.

On the other hand, if you want to clean the carpet, etc., you can change the input setting to the carpet, that is, lower the resistance.
Similarly, a high frequency signal is transmitted from the hose 1 to the voltage conversion unit 9 in the main body 8 via the amplification unit 6 in the insertion port 5. A high voltage corresponding to a high frequency signal is output from the voltage conversion unit 9, and the phase control unit 11 drives the fan motor 12 with a large conduction angle corresponding thereto, so that the suction force can be increased.

As described above, in the present embodiment, the resistance value: high → frequency: low → voltage: low → conduction angle: small resistance value: low → frequency: high → voltage: high → conduction angle: large, the user sets the input. By changing the setting of the section 2 with the variable resistor, the conduction angle of the fan motor 12 can be changed to change the suction force.

FIG. 2 is a waveform diagram (b) of the frequency conversion part 3 of the input setting part 2 by the input (a) in the hose 1 and a waveform diagram (c) of the amplification part provided in the insertion port 5. FIG. 7 is a waveform diagram (e) of the phase controller 11 based on the voltage (d) by the voltage converter 9 in the main body 8 and a diagram showing a weak-weak relationship of the suction force depending on the applied voltage value (f) of the fan motor 12.

As described above, according to the present invention, the signal set by the input setting unit provided in the hose is converted into the frequency by the frequency converting unit,
The signal is transmitted to the main body after being amplified by the amplification unit at the insertion port connected to the hose. The frequency signal is converted to a voltage by the voltage converter, and the phase controller converts it to a conduction angle to drive the fan motor.Therefore, even in a central type vacuum cleaner, the suction force is strong without using a throttle valve. You can now easily adjust the height.

Also, in the case of a Centriral type vacuum cleaner, the length of the hose is 4 m even if it is short, and about 10 m is long, so attenuation of the output signal from the frequency conversion part in the hose is unavoidable,
By providing the amplifying portion in the insertion port as in the present invention, it becomes possible to reliably transmit a signal from the hose to the insertion port and the main body, and it is possible to obtain stable cleaning performance without malfunction. Has excellent effect.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a waveform diagram of the main part, FIG. 3 is an exploded front view of a conventional central type vacuum cleaner, and FIG. 4 is a circuit of the main part. It is a figure. 1 ... Hose, 2 ... Input setting part 3 ... Frequency conversion part, 5 ... Insertion part 6 ... Amplification part, 8 ... Main body, 9 ... Voltage conversion part 11 ... Phase control part, 12 ... … Fan motor

Claims (1)

[Claims] 1. An input setting unit capable of setting a suction force of a fan motor and an output signal of the input setting unit,
A hose including a frequency conversion unit that converts the frequency to a corresponding frequency, an insertion unit that includes an amplification unit that amplifies a signal from the frequency conversion unit, and that can be connected by inserting the hose, and the insertion port. A main body that is connected and has a built-in voltage converter that converts the frequency signal from the amplifier into a voltage, a phase controller that converts the voltage signal from the voltage converter into a conduction angle and drives the fan motor, and a fan motor. Central type vacuum cleaner characterized by consisting of.