JPS58192519A - Electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a vacuum cleaner.

Generally, in a vacuum cleaner, the dust collection power decreases as the amount of dust collected increases or as the load on the stain blower increases depending on the type of floor surface. Therefore, it is necessary to increase the input power of the electric blower. Conventionally, as a means for achieving this, input control of the electric blower has been performed using a motor control circuit including a control element such as a triac, but this requires manual operation of a variable resistor regulator connected to the motor control circuit. Therefore, each operation must be performed by returning to the main body of the cleaner, which is troublesome. Also, since it is a manual operation, it is completely useless unless you know how to use it. Furthermore, a thin sheet or the like may seal the suction port of the suction port body, which may significantly reduce the suction air volume and cause the electric blower to overheat.

This invention was made in view of these points, and when the suction air volume decreases due to load fluctuations, the input of the electric blower is automatically increased to restore the dust suction capacity. Another object of the present invention is to provide a vacuum cleaner that can be easily run while preventing the suction port from coming into close contact with the sheet.

This invention provides a sensor that outputs a signal corresponding to the suction air volume, which changes depending on the load, and inputs the output of this sensor to the motor control circuit through a switching unit. By automatically controlling the input of the sensor and keeping the switching unit set to output a signal directly proportional to the input from the sensor, it is possible to increase the input of the electric blower when the intake air volume decreases due to the line type, etc. By restoring the suction power and reducing the input to the electric blower when the suction air volume increases on hard floors, this adjustment can be made automatically, and the switching section outputs a signal inversely proportional to the input from the sensor. By setting it in the state that The device is designed to reduce running resistance even on thin sheets and to efficiently clean the surfaces.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 6 VC. First, FIGS. 1 and 2 schematically show a vacuum cleaner. An electric case (1) and a dust case (2) are removably connected by a clamp (3). A suction port (4) is formed on the front surface of the dust case (2), and a filter unit (5) is installed inside. An electric blower (6) is installed inside the electric case (1),
A ventilation hole (8) is formed on the front surface (7).
A cover (9) is detachably attached to the lower part of this front surface (7). As a result, a suction air passage for dust collection is formed between the exhaust side of the dust case (2) and the suction side of the electric case (1).

Next, as shown in FIG. 3, the cover (9) K attached to the front surface (7) of the electric case (1) has a mesh filter α facing the ventilation hole (8) located at the lowest position.
υ is formed. A fixed plate (6) is screwed to the lower part of the front surface (7) of the electric case (1), and this fixed plate (6) is biased in the direction of separation by the movable plate (to) and the spring (t). It is attached so that it can rotate freely around the hinge α◆. A permanent magnet α0 is fixed to the fixed plate (6), and a magnetic sensing element αη is fixed to the movable plate (to). Moreover, the pressure t- of the spring (to) is applied to the movable plate (to).
An adjusting screw (2) is screwed together to adjust the cover (9).
An adjustment hole (E) closed by a stopper (E) is formed facing the adjustment screw (E), and further supports the movable plate (E) and adjusts the distance between the movable plate (E) and the fixed plate (6). Adjustment screw 01 is screwed together. Then, a sensor detects the intake air volume using the permanent magnet αO in the cover (9), the magnetic sensing element αη held on the Loe moving plate (to), and the amplifier (2) and generates a signal according to the air volume. configured. As shown in Figure 4, the output side of this seven-point wire is a display circuit (goods).
and an inverting circuit (c) which is a switching section. The display circuit (product) consists of a display 64 in which a large number of LEDs are arranged and a circle drive circuit (product). (to the inverting circuit)
is equipped with a changeover switch having positions 1 and 2,
When switching to position 1, a signal is output that is directly proportional to the input from the sensor, and when switching to position 2, a signal that is inversely proportional to the input from the sensor is output. The output 111J of the inverting circuit (c) is connected to the input side of the motor control circuit through the terminal (4) of the automatic/manual changeover switch. This motor control circuit (G) has a triac control circuit 0υ such as a trigger circuit, and a triac 0v whose gate side is connected to this triac control circuit 0◇.

This triac O is sequentially connected to the electric blower (6) and the negative pole of the plug connected to the end of the cord. The other pole of the plug (to) is connected to the power supply circuit (b). This power supply circuit (b) is a remote control circuit operated by a remote control switch (g).
2) and a DC power supply Off) connected to this remote control circuit (2). A variable resistor (2) connected to the setting power source (2) is connected to the terminal (I) of the auto/manual changeover switch (2). This auto/manual changeover switch 4's operation knob], l is a variable resistor (7)
It is placed at the top of the electric case (1) and also serves as an operation section. Furthermore, the LED indicator) is also placed on the top surface of the electric case (1). Further, the remote control switch (to) is arranged at a grip portion of a suction hose (not shown) that is inserted into the suction port (4).

In such a configuration, cleaning by turning on the remote control switch (b) and driving the electric blower (6) is the same as in the past. When the power input to the electric blower (6) is constant, the suction air volume changes when the suction port body is connected to the floor and cleaned.

In the case of hard floors, there is a tendency for the suction wind cover to increase due to the formation of some gaps between the suction port body and the floor surface, and in the case of paper flooring, the suction wind cover tends to increase depending on the length of the pile. There is a tendency for the suction air volume to decrease as the air becomes clogged with hair. If the suction port body is moved away from the floor, the suction air volume will be maximum9, and the suction air volume will also change depending on the amount of collection air. In accordance with this change in the amount of suction air, the rotational position of the movable plate (to) relative to the spring (c) changes, and the opposing distance between the magnetically sensitive element a'i) and the permanent magnet (2) changes. Therefore, the sensor (to) detects the intake air volume using the electric signal amplified by the magnetic flux density change total amplifier (2).

This signal is input to the D drive circuit (b) and the display shows the status.

Normally, cleaning is performed with the changeover switch @ of the inverting circuit (c) set to position l. In other words, the output of the assembly changes depending on the increase or decrease in the intake air volume, but the inverting circuit (E) outputs an output directly proportional to the input from the sensor (To) to the motor control circuit (1), and therefore the electric blower ( As shown in FIG. 5(cL), it is possible to reduce the input power to 6) when the suction air volume increases and to increase it when the suction air volume decreases. That is, in the case of wire type cleaning, the input power can be increased to ensure the entire suction air volume above a certain level. In addition, in the case of a hard floor, the input power is reduced to limit the increase in the intake air volume. In this way, the input power to the electric blower (6) can be automatically controlled according to changes in the intake air volume. Figure 6 is a graph showing the relationship between the suction air volume and the degree of vacuum.As the load shifts from cleaning hard floors to carpet cleaning, the input power to the electric blower (6) increases. This is done while moving from ``A'' to ``MOUTH'' to prevent a decrease in suction air volume and effectively suck up fine dust attached to the bristles.

When cleaning on a thin sheet such as vinyl, which is called a thin sheet, the sheet sticks tightly to the suction port of the suction port body and does not come off, and the suction air volume is drastically reduced. When the changeover switch (2) of the reversing circuit (2) is set to position 1, the input power to the electric blower (6) increases, so that the sheet comes into closer contact with the suction port body. Therefore, when cleaning thin sheets, set the selector switch to position 2. As a result, the signal output from the sensor according to the intake air volume does not change, but now the inverting circuit (2) outputs a signal that is inversely proportional to the input from the assembly. In other words, even though the sensor detects that the thin sheet is in close contact with the suction port body and the intake air volume is actually drastically reduced, the reversing circuit () outputs the opposite information to the motor control circuit (■). . This allows the electric blower (6)
Since the input becomes smaller and the suction force at the suction port of the suction port body is reduced, the sheet is separated from the suction port body and the suction port body can be completely run on the sheet. At this time, the suction air volume is restored to the value required for dust suction, but the above-described operation can be automatically repeated each time the sheet comes into close contact with the suction port body.

Next, a second embodiment of the present invention will be explained based on FIGS. 7 and 8. Components that are the same as those in the embodiment described above are designated by the same reference numerals, and description thereof will be omitted (the same applies hereinafter).

A setting device is provided to variably set two reference voltages as the output (pressure) from the assembly changes. The output side of this setting device □□□ is connected to the input side B of the switch circuit and the input side B of the comparison circuit
and are connected in parallel.

The output side of the assembly is connected in parallel to the display circuit (c), the input 11A of the switch circuit, and the human power 111A of the comparison circuit. The output 1Ill of the comparison circuit is connected to the switch circuit. The changeover switch has two changeover positions; in position 1, the setting value set in the setting device (6) is applied to the changeover switch (■) and the comparison circuit, and in position 2, the other setting value is applied. The voltage is applied to the switch circuit and the comparison circuit. Further, the comparator circuit U has a changeover switch with two switching positions, and in position 1, the output from the sensor (E) and the setting device (E) are output.
6), and at position 2, the output from the sensor (e) and the other set value of the setting device (contact) are compared. The switch circuit ■ normally outputs the input (A@) from the sensor (2) to the inverting circuit (E), and when receiving the output from the comparison circuit -, outputs the input (A side) from the sensor (E). The setting value applied from the cut-off setting device) is output to the inverting circuit).

In such a configuration, first, two setting values are set on the setting device, and the changeover switch is set to position 1. The switching operations of these changeover switches 1-1 are performed in conjunction with each other. Explaining using the graph in FIG. 8 (-), when the intake air volume increases, the input power to the electric blower (6) is small as described above. While the load increases and the suction air volume decreases to reach the value of Ql, the output from the 7-plane coil is input from the switch circuit to the inverting circuit (E), and the input output is directly proportional to 900,000,000. This is output to the motor control circuit, thereby increasing the human power of the electric blower (6). When the intake air volume decreases from Qz, the comparison circuit that was comparing the set value applied from the setting device (6) and the output from the sensor outputs a signal, and upon receiving this output, the switch circuit changes the output from the sensor. The input signal applied from the setting device (6) is output to the inverting circuit (c). This output is constant, and even if the intake air volume decreases thereafter, the input to the electric blower (6) remains unchanged and is maintained at the maximum input.

Therefore, compared to a hard floor, the amount of suction air is reduced for wire types, which increases the input power to the electric blower (6), and even for the same wire type, paper types with long piles require less input power to the electric blower (6). Although the amount increases, according to this embodiment, the electric blower (6) can be driven with the maximum input even when cleaning paper types with short pile length. That is, let Qs be the suction air volume when cleaning short-pile paper types, and set the setter (6) to a setting value equal to the output from the sensor (to) corresponding to this Ql.

When cleaning a thin sheet, as described above, set the reversing circuit to position 2 while interlocking the other changeover switch circuits. Therefore, the signal (to the sensor) is input from the switch circuit (product) to the inverting circuit (c), and the inverting circuit (c) outputs an output inversely proportional to the input value to the motor control circuit (1).
As shown in Figure (4), in the process where the intake air volume increases from Ql, the input power to the electric blower (6) also increases. When the thin sheet comes into close contact with the suction port body, the suction air volume is drastically reduced to below Q1. However, this QIi, b′&1atK″ff1
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By setting a new setting value in the setting device, the setting value is compared with the output from the sensor (2), and when they match, the comparison circuit outputs an output, and upon receiving this output, the switch circuit outputs an output. The circuit (2) cuts off the input from the sensor (to) and inverts the constant value input from the setting device.
Output to. The inverting circuit (e) outputs an output that is inversely compared with the input value, and although the output is slow, it is sufficient to drive the electric blower (6). Therefore, when a thin sheet comes into close contact with the suction port body, the electric blower (6)
The input power of the electric blower (6) is lowered to wait for the suction air volume to recover, but if the suction air volume decreases below Q1, the dust suction action continues without stopping the electric blower (6) at all, although the running resistance of the suction port body is somewhat heavy. It is possible to wait for the suction air volume to recover while doing so.

Furthermore, a third embodiment of the present invention will be described based on FIG. 9 and FIG. 1θ. This embodiment uses the switch circuit shown in Fig. 7.
Instead, a variable amplifier V) is connected between the sensor (To) and the inverting circuit (E). Other configurations are similar to the second embodiment.

Then, normally, the selector switch @-@4 is set to position 7, and the inverting circuit (in the inverting circuit) receives the signal from the sensor (2) and outputs an output that is directly proportional to the input for cleaning. . When cleaning lines with long piles, the suction air volume decreases next to thin sheets, and the suction air volume at this time is defined as Qx. Naturally, when a different eyelid is inhaled, the amount of inhaled air is further reduced. As a result, by setting a value equal to the signal from the seven sensors corresponding to (b) in the setting device @4, the comparison circuit compares the set value of the sensor with the signal from the sensor. When the value and the signal from the sensor match, the amplification degree by the variable amplifier α power is varied by the output from the comparator circuit, and the signal output from the inverting circuit) to the motor control circuit (g) is changed. If the suction air volume is reduced to Q leakage due to foreign objects clogging the suction port during cleaning, the input power of the electric blower (6) will be attenuated instead of increasing, and the foreign objects will be removed from the suction port. It is possible to recover the suction force immediately after releasing the grip. Of course, this series of input controls can be performed automatically.

Also, when cleaning thin sheets, set the changeover switch @wheel to position 2, and output an output inversely proportional to the input value from the reversing circuit (E) to the motor control circuit. The thin sheet is in close contact with the
By setting the setting value equal to the signal output from the sensor (E) when the amount decreases to 1 in the setting device, the sheet will come into close contact with the suction port as shown in Fig. 10 (4). When the suction air volume drastically decreases to Ql, the comparison circuit outputs an output that matches the setting value of the setting device and the signal from the sensor, and upon receiving this output, the variable amplifier (b) amplifies the output from the sensor. By changing the rate, the input power to the electric blower (6) is suddenly reduced at the intake air volume below Q1,
It is possible to use the sheet in a manner that promotes separation of the sheet from the suction port body.

FIG. 11 is a block diagram showing a fourth embodiment of the invention. In this embodiment, a second setter @4 is added to the configuration shown in FIG. 9, which varies the amplification factor by the variable amplifier value by varying the output of the comparator circuit.

Therefore, in the usage mode in which the selector switch (@-) is set to position 1, the human power to the electric blower (6) is rapidly attenuated when the intake air volume decreases below the working level in Figure 1O (-). However, according to this embodiment, the second setting device is operated to change the output of the comparator circuit, and accordingly, the amplification factor of the variable amplifier for the input from the sensor is changed. As shown in FIG. 12(a), it is possible to change the attenuation rate of the input power to the electric blower (6) when the intake air volume decreases below Q3 as indicated by the dotted line A or B.

Therefore, even when cleaning the same type of paper, if the pile is long and dense, the suction air volume decreases quickly and the electric blower (6) overheats quickly, so it is better to reduce the input power by the attenuation rate shown in A. Adjustable range of amplification factor of variable gain f @ gain αη
It is also possible to change it to multiple stages such as mouth, ha, and two.

By the same means, even when cleaning thin sheets with the changeover switch (7)-1 set to position 2, the amplification factor of the variable amplifier @no can be changed to
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When the electric blower (6) is operated, the human power applied to the electric blower (6) can be reduced by the attenuation rate shown in (A) and (V). Therefore, if a thin sheet frequently sticks to the suction port body, the input power is reduced by the attenuation rate shown in A. This makes it possible to improve the deflection of the sheet from the suction port body and further improve the running performance of the suction port body.

In addition, as can be said in common with the first to fourth embodiments, by switching the auto/manual changeover switch @7 to the number terminal on the manual side and varying the resistance of the variable resistor, it is possible to switch to the conventional manual mode. It is also possible to adjust the input power by

Since this invention is configured as described above, when the intake air volume changes due to a change in load, the output of the sensor can be input to the motor control circuit to automatically control the input power to the electric blower. By providing a switching unit that selects between outputting an output directly proportional to the input from the sensor to the motor control circuit and outputting the output to the motor control circuit with an output inversely proportional to the input from the sensor, the intake air volume is reduced. It is possible to obtain a usage pattern in which the input power of the electric blower is increased when the suction air volume increases, and the input power of the electric blower is decreased when the suction air volume increases, and when the suction air volume decreases when cleaning thin sheets etc. This has the effect of reducing the amount of human power required for the electric blower, thereby making it possible to prevent the electric blower from overheating and to recover the suction power.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the overall structure of a vacuum cleaner according to the first embodiment of the present invention, Fig. 2 is a partially cutaway side view, and Fig. m3 shows the structure of its sensor. Fig. 4 is a block diagram showing the circuit, Fig. 5 is a graph showing the relationship between the input power to the electric blower and the suction air volume, and Fig. 6 shows the suction air volume and vacuum. 7 is a block diagram showing the circuit according to the second embodiment of the present invention, and FIG. 8 is a graph showing the relationship between the input power to the electric blower and the intake air volume. , FIG. 9 is a block diagram showing the circuit according to the third embodiment of the present invention, FIG. 1θ is a graph showing the relationship between the input power to the electric blower and the suction air volume, and FIG. FIG. 12 is a block diagram showing the circuit related to the fourth dormitory embodiment, and FIG. 12 is a graph showing the relationship between the input power to the electric blower and the suction amount. 6... Electric blower, 23... Sensor, 25... Reversing circuit (switching part), 30... Motor control circuit application
People Tokyo Electric Co., Ltd. -=, ) Amount of Yabuwagai

Claims (1)

[Claims] A motor control circuit that controls the input of the electric blower and a sensor that outputs a good signal according to an increase or decrease in intake air volume are provided, and a signal that is directly proportional to the input from the sensor is provided between the sensor and the motor control circuit. 1. A vacuum cleaner, characterized in that a switching unit is connected thereto for selectively performing an output operation and an operation of outputting a signal inversely proportional to the input from the sensor.