JPH02291824A - Central type suction cleaner - Google Patents

Abstract

PURPOSE:To improve the efficiency of wiring work and to prevent a difference of cleaning-performance caused by a hose length by providing a power nozzle wherein a rotary brush and a driving motor therefor are contained, and lead wires along a hose assembly, and a transformer whereby an electric current is supplied from the secondary output thereof to the rotary brush-driving motor. CONSTITUTION:By four lead wires 5, the secondary of a transformer 4 whereby an electric current is applied to a rotary brush-driving motor 41 in a power nozzle 40, together with a control circuit 3, are connected to each of hose-inserting ports 11, 12, 13. In this transformer 4, an A.C. of 100V is inputted from the primary and low voltage, e.g. an A.C. 36V or lower, is outputted to the secondary. Even a person who has not a licence as an electrical worker, therefore, can do wiring work since the line voltage from a cleaner main body 1 to the hose-inserting port 11, 12 or 13 is the A.C. of 36V or lower. In each of hose assemblies 20, a voltage drop is caused by both an electric current applied to the rotary brush-driving motor 41 and an electric resistance in lead wires 23 for power supplied which are buried in a hose of the hose assembly 20. It can be, however, made constant, independent of a hose length since an electric resistance value is made constant by the composition of the number of element wires which is in proportion to the hose length.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a central type vacuum cleaner. Conventional technology 1a The layout and circuit layout of a central type vacuum cleaner are shown in Figures 3 and 4. That is,
The vacuum cleaner main body 100 includes a fan motor 102 and a control circuit 10
3 and a built-in filter 101 for filtering the suctioned seaweed dust, and installed outdoors or in the lower part;
112. The hose 122 of the hose unit 120 is connected to either of the hose ports 111 to 112113,
Furthermore, an extension pipe 1 is attached to the tip of the hose unit 120.
31. 132 to which a floor nozzle 140 is connected.
, 113 are arranged along the piping 105 and connected in parallel to the control circuit 103 in the main body 100. Further, an exhaust port 107 is provided in the main body 100 so that the exhaust can be exhausted 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, and the floor nozzle 140, the extension pipes 132, 131, the hose unit 120, and the hose insertion ports 111, 112 are activated.
, 113, dust is sucked from the intake port 104 through the piping 105 to perform cleaning. Hand switch 12
The signal line that conveys that 1 is ONL is shown in Figure 5 (a
As shown in Hb), a piano wire 123 buried in the hose 122 is used to maintain its shape.

By the way, in recent years there has been a strong demand for carpet cleaning due to significant changes in the living environment, and turbine nozzles in which a rotating brush is provided inside the floor nozzle 140 and the rotating brush is rotated by intake air are increasing in number. Problems to be Solved by the Invention However, in such a conventional configuration, as the distance between the main body 100 and the hose insertion port increases, the pressure loss of the piping 105 increases, and the length of the port 122 ( For example, there is a difference in the wind force depending on the original prisoner, such as a difference in pressure loss depending on the position (4 m pose and 8 m pose), so the rotation speed of the rotating brush is not constant, and the distance from the room body 100 The problem was that cleaning performance varied depending on the length. Floor nozzle types with a rotating brush inside the floor nozzle include a turbine nozzle type and a power nozzle type with a built-in small motor for driving the rotating brush.If the latter is applied to a central type, pressure loss Even the difference in wind force caused by the wind force can be kept constant. To do this, it is necessary to supply AC 10GV from the ¥:h source to the floor nozzle, but in order to wire the AC 100V power line to the hose outlet, a person must have a license as an electrician, so wiring work must be carried out. The problem arises that the workability of the machine decreases. The present invention solves this problem, and has as its object the provision of a central vacuum cleaner in which the rated voltage of the rotating brush drive motor for the power nozzle is AC 3GV or less. Furthermore, in addition to the piano wire that was conventionally used as a signal line, a conductive wire is required to feed the rotating brush drive motor, and this sleeve port is used in floor-moving vacuum cleaners. is used more frequently than before, but
If we apply this directly to the central form, the following problem will occur. In other words, the length of the hose used in central vacuum cleaners varies depending on conditions such as the size of the room, and as a result, the length of the conductive wire also changes. A large difference in electrical resistance occurs; for example, the electrical resistance of a 4 m hose is half that of an 8 m hose. Furthermore, if the input voltage of the rotary brush Ilfg motor remains the same and the motor voltage specification is lowered to AC 36V or less as described above, the current consumption will be reduced by that much compared to that of the conventional floor movable type. It has increased three times. As a result, if the hose of a floor-moving vacuum cleaner (which has a conductive wire buried in it in addition to the piano wire) is used as is, the power nozzle motor rotation speed will change significantly depending on the length of the hose, resulting in inconsistent cleaning performance. The present invention further solves this problem and aims to provide a central type vacuum cleaner in which the number of strands of conductive wire is changed depending on the length of the hose. Means for Solving the Problems In order to solve the above-mentioned conventional problems, the central type vacuum cleaner of the present invention includes a vacuum cleaner body with a built-in fan motor, and a hose unit connected to the suction side of the vacuum cleaner body. ,
A power nozzle with a built-in rotating brush and its driving motor is connected to the tip of the hose unit via an extension tube, and a conductive nozzle is provided along a part of the hose unit to supply power to the rotating brush driving motor. A wire and a wire provided inside the vacuum cleaner body to supply power to the rotary brush drive motor.
This is because it is equipped with a transformer that supplies power from the next output.

Furthermore, the central type vacuum cleaner of the present invention includes a vacuum cleaner body with a built-in fan motor, a hose unit connected to the suction side of the vacuum cleaner body, and a hose unit connected to the tip of the hose unit via an extension pipe. , a power nozzle with a built-in rotating brush and its driving motor, and a plurality of stranded wires, a part of which is placed along the hose unit, for power supply to the rotating brush rgA driving motor, and the number of the strands. It is equipped with a conductive wire configured to be proportional to the length of the hose. With the above configuration, power can be supplied to the rotary brush drive motor at a voltage of AC 36V or less, for example, without the need for an electrician's license. can be used, and is not affected by pressure loss due to piping or hoses, unlike conventional methods. In addition, if the length of the hose used is long, the number of strands is increased, and if the hose is short, the electrical resistance of the conductive wires can be made the same by using fewer wires. Since it can be used once without being affected by the length, it can be used to clean evenly and reliably. EXAMPLE An example of the present invention will be described below based on the drawings. FIG. 1 is a circuit diagram of a central type insertion/extraction machine showing one embodiment of the present invention. In Figure 1, I? ^In addition to the fan motor 2 and the control circuit 3, the vacuum cleaner body l has an insulated transformer 4 built in to supply power to the rotating brush drive motor 41 of the power nozzle 40, and the secondary side of the transformer l1 is controlled. Hose outlets 11 and 12 are connected to the circuit 3 and four conductive wires 5.
．． 13, and the ACI is connected to the primary side of this transformer 4.
OOV is input, and the secondary side is, for example, AC 36V.
The following voltages are output.

Therefore, from the insertion/removal machine main body l to the hose insertion ports 11 and 12,
．． Since the voltage between wiring meters up to 13 is below AC 36V, wiring work can be carried out even by those without an electrician's license. 21 is a hand switch provided with the hose unit 20, and upon receiving an ON signal from the hand switch 21, the control circuit 3 is activated.
drives the fan motor 2 and supplies power to the transformer 4. 22 is a power nozzle switch provided in the hose unit 20, and this power nozzle switch 22 is turned on.
By N, the secondary 1 of transformer l1! ! The voltage of IJ is applied to the rotating brush II of the power nozzle 40 and the driving motor 41.
is applied to drive the power nozzle 40. If the hand switch 21 is currently OFF, the control circuit 3 will not operate, and neither the fan motor 2 nor the transformer 4 will be supplied with power. Therefore, even if the power nozzle switch 22 is turned ON in this state, the rotating brush drive motor 41 is not energized.

Next, when the hand switch 21 is ON, the control circuit 3 operates and power is supplied to the fan motor 2 and the transformer 4.
Suction is performed. At this time, the power nozzle switch 22
When turned ON, the rotating brush drive motor 41 is energized, and the rotating brush rotates to perform cleaning. At this time, a voltage drop occurs within the hose unit 20 due to the current flowing through the rotary brush drive motor 41 and the electrical resistance of the power supply conductive wire 23 embedded in the hose of the hose unit 20. a) As in (b),
By adjusting the number of wires according to the hose length, the electrical resistance value can be kept constant regardless of the length of the hose.
The voltage drop in the hose unit 20 can be made constant regardless of the length of the hose.

For example, it is assumed that the conductive wire 23 of the hose has a stranded wire structure in which seven wires each having a diameter of 0.18 m are bundled as shown in FIG. 2(a). Now, when the length of the conductive wire is Qm, the electrical resistance R is on Roc ・ 1 ・ λ Sn Where, S is the cross-sectional area of the conductor, n. is experimentally determined to be the number of strands. For example, to make a 4m hose with the same resistance as an 8m hose, cross section! aS 8m
Either set it to 17218 for the hose, or set the number of strands n to 172.
It turns out that you can double it. Any method may be used, but here, the electrical resistance is made equal by changing the number n of strands as shown in FIG. 2(b) to FIG. 2(a).

In other words, the electrical resistance R4 of a 4m hose is R4cx:-x
-x4-Upper X'

According to the above configuration, the voltage and current applied to the rotary brush drive motor 41 of the power nozzle 40 are constant even if the length of the hose used is different, and the input is constant and there is no difference in cleaning performance.

In this way, according to this embodiment, power can be increased by using a hose whose electrical resistance value is constant by changing the number of wires depending on the length of the hose, and by using the low voltage output of the transformer. Since a constant voltage can always be applied to the motor that drives the nozzle's rotating brush, the power nozzle can always be used under stable conditions without being affected by pressure loss in piping or hoses, which reduces the impact on cleaning performance. It can be resolved.
Furthermore, by making the transformer insulated, there is no risk of electric shock to the human body even if an accident occurs in the power nozzle system.

Effects of the Invention As described above, according to the present invention, it is possible to use a power nozzle as a floor nozzle, and even if the length of the hose used is different, there is no difference in the electrical resistance. The function of the power nozzle is not affected by pressure loss in the hose, and the function of the power nozzle can be fully utilized, allowing for reliable cleaning. Further, since power is supplied to the rotating brush drive motor of the power nozzle using the secondary output of the transformer, for example, AC 36V or less, there are no restrictions on wiring workability, and workability can be improved.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing a central type vacuum cleaner according to an embodiment of the present invention, Figs. Fig. 4 is a circuit diagram of a conventional central type vacuum cleaner, and Fig. 5 (aHb) is a plan view and partially enlarged sectional view of a hose. 1... Vacuum cleaner body, 2... Fan motor, 3... Control circuit, 4... Transformer, 11, 1
2. 13... Hose insertion port, 20... Hose unit l., 21... Hand switch, 22... Power nozzle switch, 23... Conductive wire, 40... Power nozzle, 41... Rotating brush drive motor. agent
Yoshihiro Morimoto 2nd figure (mu (tono 4 starvation 9 sokutaichi matata figure [leg end 22 r / figure 4!

Claims (1)

[Claims] 1. A vacuum cleaner body with a built-in fan motor, a hose unit connected to the suction side of the vacuum cleaner body, and a rotating brush connected to the tip of the hose unit via an extension tube. a power nozzle with a built-in driving motor therein; a conductive wire that partially runs along the hose unit for power supply to the rotating brush driving motor; A central vacuum cleaner equipped with a transformer that supplies power from the secondary output. 2. A vacuum cleaner body with a built-in fan motor, a hose unit connected to the suction side of the vacuum cleaner body, and a rotary brush and its driving motor connected to the tip of the hose unit via an extension tube. It is composed of a built-in power nozzle and a plurality of stranded strands of strands, a part of which runs along the hose unit, for power supply to the rotary brush drive motor, and the number of strands is proportional to the length of the hose. A central type vacuum cleaner equipped with a conductive wire.