JPH0223920A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To simplify interchangeability between a model using an external signal for the automatic control of an electric fan and a model not using it by a method wherein a trigger device is operated according to only an output from a differential amplifier when an external signal is not inputted. CONSTITUTION:When a signal from external, such as a sensor for pressure, etc., is not inputted to terminals (C, D), an arithmetic logical unit 52 directly outputs an output from a differential amplifier 13 to a trigger device 14. An electric fan 7 is therefore controlled according to an electric current applied through a variable resistor 1 provided on a gripping pipe for a hose. On the other hand, a signal from external, such as the sensor for pressure is connected with the terminals (C, D), operation between an output from the differential amplifier 13 and an output from the external signal is done by the arithmetic logical unit 52, and its result is outputted to the trigger device 14. In this manner, the electric fan 7 is automatically controlled not only according to cursor handling but also according to the external signal from the sensor for pressure.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to an electric vacuum cleaner which is equipped with a control unit of an electric feeder and controls the suction force by operating the proximal portion of the hose. In particular, the present invention relates to a structure for switching the presence or absence of vllll based on an external signal from a pressure sensor or the like.

(Conventional wave packet) An example of the configuration of an electric circuit in a conventional vacuum cleaner is shown in Part 8.
This will be explained based on the diagram.

n The variable current stage 1 provided at the proximal portion of the hose that is detachably connected to the remover body is the terminal △.

It consists of a variable resistor 2 connected to eight resistors, and a resistor 3 connected in parallel to the variable resistor 2.

On the other hand, in the 1111 section 5 on the side of the main body, an external AC power source II! Electric blower 7 and electric power υl between the two poles of 6
I! A triac 8 as l1 means is connected in series, and this triac 8 has a resistor 9 and a capacitor 1.
A snubber circuit 11 consisting of 0 series circuits is connected in parallel. This snubber circuit 11 is for ensuring that the triac 8 is turned on. Also, a differential amplification means 13 is provided between the DC power supply means 12 connected to one pole of the AC power supply 6 and the other pole of the AC power supply 6.
and trigger means 14 are connected in parallel.
Between the trigger means 14 and one pole of the AC power source 6,
Zero cross means 15 for detecting the OV of this AC power supply 6 is connected. The DC power supply means 12, the differential amplification means 13, the trigger means 14F3, and the zero cross means 15 are specifically constituted by, for example, one well-known bipolar tC for triac phase control.

Also, the above direct ilI! Power supply means 12 and differential amplification means 13
Protective means (1) 16 and protective means (2) 17 are connected in series between one input terminal of The connection point of the protection means (2) 17 is the current variable means 1
It is designed to be connected to the terminal. Further, between the other pole of the AC power supply 6 and the other pole of the differential amplification means 13, there are a protection means (3) 18 and a protection means (4) 19 which similarly limit the current between the earth power supply and the ground power supply. are connected in series, and these protection means (a) 18 and protection means (4) are connected in series.
) 19 is connected to the terminal B of the current variable means 1. and said protection means 16.
17, 18, and 19 constitute a converting means 20 that converts the current from the current variable means 1 into a voltage. Further, the difference att between both input terminals of the differential amplification means 13 is
A magnification means 21 for adjusting the input of the IC means 13 is connected. In addition, these protection measures 16, 17, 18, 19
Specifically, F3 and magnification means 21 each consist of, for example, a fixed resistor.

One output terminal of the differential amplification means 13 is connected to one input terminal of the trigger means 14.

Further, another output terminal of the differential amplification means 13 is connected to the terminal ct, :i, and the tri-amplifier is connected to the means 1.
Another input terminal of 4 is connected to the terminal,
These terminals C2D are connected to jumper B provided for mounting or handling the electronic components that make up the III ti11 part 5.
22. Furthermore, said bird is means 1
The output terminal of 4 is connected to the gate of the triac 8.

Then, the protection means (1) 1 is powered by the DC power supply means 12.
6. A constant voltage is applied to the series circuit of the current variable means 1 and the protection means (4) 19, but the change in resistance value between terminals A and B due to the variable resistor 2 being operated by the user is , is detected as a change in the voltage drop between terminals A and B.

And the voltage between terminals A and B is protected by protection means (2) 17
and protection means (3) 18, differential amplification means 1
The signal is applied to the input terminal of No. 3, is amplified, and is output to the trigger means 14 via the terminals C, D and jumper 1!22. This trigger means 14 is, for example, a zero cross means 15.
When the sawtooth wave voltage generated by using the AC power supply 6 and the Ti 51 exceeds the DC output voltage from the differential amplification means 13, a trigger output is output to the gate of the triac 8, and the phase of the triac 8 is changed. Then, if the resistance value of the variable resistor 2 changes, the differential amplifying means 1
Since the output voltage of 3 changes, the phase angle at which it reaches phase υ1@ changes, and N! 11 The input of the blower 7 changes.

In addition, in the conventional vacuum cleaner shown in FIG. 8, the electric blower R7 is activated according to the output of a pressure sensor or the like disposed in the air passage communicating with the electric blower 7. If the model is to be controlled by il, use jumper 1i! which shorts terminals C and D. 22 was cut to open the terminal C2D, and the output terminal of the pressure sensor was connected to the terminals C and D by P&. In a model in which a pressure sensor is connected in this way, for example, the output voltage of the pressure sensor is added as an external signal to the output voltage of the conversion means 20 amplified by the differential amplification means 13, and in addition to the current change in the current variable means 1. Then, the electric feeding rock 7 is controlled according to the output from the pressure sensor.

(Problems to be Solved by the Invention) As mentioned above, in the conventional electric illusion remover, when the electric blower 117 is not automatically controlled according to the output of a pressure sensor, etc., the differential Terminals C and D between the amplification means 13 and the trigger means 14 must be short-circuited using a jumper@22, a shorting bar, a switch, etc. On the other hand, if the model is to be automatically controlled, the jumper wire 22 must be short-circuited. I had to connect a pressure sensor, etc. to terminals C and D by cutting them off. In other words, it is not easy to change the A-seat model from one that does not perform automatic control to one that does, resulting in poor manufacturability.

The present invention aims to solve these problems, and it is easy to change between models that use external signals for automatic control and models that do not. J has good construction,
The purpose is to provide electrolytic lead mi that can be produced at low cost. Furthermore, it is an object of the present invention to provide a vacuum cleaner that allows the user to select whether or not to perform automatic control, has a simple configuration, and can be made at low cost.

[Structure of the invention]

(Means for Solving Problem 51) A vacuum cleaner according to claim 1 of the present invention includes an electric blower, an lltll section for controlling the electric blower, and a control section connected to the control section for operating the electric blower. and a current variable means, and the control unit controls a current υ between the DC power supply means for supplying power to the current variable means and the ground power source.
a converting means for converting the current from the current variable means into a voltage; a multiplying means for adjusting the input of the converting means; a differential amplifying means for amplifying the output of the converting means; an external input means for inputting an external signal from a pressure sensor or the like other than the means; a computation means for performing a calculation between the external signal from the external input means and the output of the differential amplification means; and an output of the calculation means. or a trigger means for outputting a trigger output in accordance with the output of the differential amplification means, and a power control means connected in series with the transmitter IyJ 1a, the trigger being operated by the trigger output from the means. In the absence of the external signal input, the trigger means operates only in response to the output of the difference 1I1111 width means.

Furthermore, in the vacuum cleaner of claim 2, the control section determines whether or not the output of the differential amplification means is within a certain set range, and when the output of the differential amplification means is outside the set range, an external input signal from the external input means is provided. A comparison/discrimination means for not inputting the signal to the calculation means is added.

(Function) In the vacuum cleaner according to claim 1 of the present invention, the current flowing through the current variable means supplied with power from the DC power supply means of the control section is 1! ? The output voltage of this converting means is converted into a voltage signal by means of a converting means which also limits the current between the converter and the converter, the input of which is adjusted by a multiplying means, and the output voltage of this converting means is amplified by a differential amplifying means. When there is no external signal input to the external input means, the trigger means outputs a trigger output to the power control means connected in series with the electric blower in accordance with only the output of the differential amplification means, and operates the power control means. let

In this way, the electric blower costs $11,111, but when the current variable means is operated and the current flowing through the current variable means changes, the output of the differential amplification means also changes, so the input to the electric blower changes. On the other hand, when the external input means receives an external signal input from a pressure sensor or the like, the calculation means performs a calculation between this external signal and the differential amplification means, and the trigger means outputs a trigger according to the output of the calculation means. Output. That is, the electric blower is υItll in response to, for example, the N flow in the current variable means as well as an external signal from a pressure sensor or the like.

Furthermore, in the vacuum cleaner of claim 2, the comparison and determination means determines whether or not the output of the differential amplification means is within a certain set range, and if the output is outside the set range, the external input means Do not allow external signals to be input to the calculation means. Therefore, the trigger means operates only in response to the output of the differential amplification means.

Oh, the difference! When the output of the 1lj1 width means is within a certain set range, an external signal is input to the calculation means. Therefore, the trigger means operates according to the output of the calculation means, and the trigger means operates according to the output of the calculation means, and the rt feeding ffl I
N Cal+11 III Sarel.

(Embodiment) Hereinafter, the structure of a first embodiment of the electric scraper of the present invention will be described based on FIGS. 1 to 3.

In FIG. 2, 31 is a vacuum cleaner body, and inside this vacuum cleaner body 31, although not shown, an electric blower is disposed on the rear side and is connected to the suction side of the electric blower to collect the air. Built-in dust filter! A seaweed chamber is formed on the front side. Further, a power cord 32 for connection to an external AC power source is led out from the rear of the vacuum cleaner main body 31.

Furthermore, the front part of the vacuum cleaner main body 31 has the I! A connection port 33 is formed to communicate the dust chamber with the outside. Further, 34 is a hose, and this hose 34 includes a flexible hose main body 35, a connecting pipe 36 provided at one end of the hose main body 35 and detachably inserted into the connection port 33, and the hose main body 35. It consists of a grip tube 31 which is provided at the other end of the grip tube 35 and serves as a hand portion. Further, 38 is an extension tube, and one end of the extension tube 38 is removably fitted into and connected to the grip tube 31. Furthermore, 39 is a suction port body, and this suction port body 39 has a suction port (not shown) on the bottom surface.
a connecting pipe 4 which communicates with the suction port and is removably fitted and connected to the other end of the extension pipe 38;
0 at the rear.

Although not shown, current variable means is provided between the grip tube 31 and the cover integral 41 fixed to the outer circumferential side of the grip tube 31, and a variable resistor constituting the current variable means is provided. A cursor 42 that slides integrally with the slider of
is slidably supported on the outer surface of the cover unit 41. Further, as shown in FIG. 3, on the outer surface of the integrated cover 41, "JUTAN", "TOKYO/TATAMI J, F SOFA", "CURTAINE", "
A display opening 143 such as "OFF" is formed. Furthermore, as shown in FIG. 2, a pair of electrical contacts 44 are provided on the outer circumferential side of the connecting tube 36 and on the inner circumferential side of the connecting port 33, respectively, and are detachably connected.

Also, the configuration of the electric circuit is shown in Figure 1, and since this electric circuit has almost the same configuration as the electric circuit shown in Figure 8 described above, corresponding parts are designated by the same reference numerals. The explanation will be omitted and only the different points will be explained.

Reference numeral 51 denotes an external input means for inputting an external signal, and an input terminal of this external input means 51 is connected to, for example, the cleaning 1 main body 31.
Electric blower inside! They are each connected to a terminal C1D for connecting a pressure sensor or the like arranged in the air passage communicating with the air passage 17. And the output terminal of the first stage of external input 51! P
The output terminals of the amplifying means 13 are respectively connected to the input terminals of the calculating means 52, and the output terminals of the calculating means 52 are connected to the input terminals of the means 14. This performance
When there is an external signal input from the external input means 51, the means 52 calculates the external signal and the output of the differential amplification means 13, and sends the result of the calculation to the trigger means 14.
When there is no external signal input, the input from the differential amplification means 13 and the output to the means 14 are set to 1=1.

Note that terminals A and B in FIG. 1 are electrical contacts 44 in FIG. 2.

Next, the operation of the above embodiment will be explained.

When the terminal C, the DkHz sensor, etc. are not connected, that is, when there is no external signal input, the calculation means 52 outputs the output of the differential amplification means 13 to the trigger means 14 as it is. Therefore, this trigger means 14 operates only in response to the output of the differential amplification means 13. That is, the electric blower 7 is controlled only according to the magnitude of the current flowing through the current variable means 1 provided in the grip tube 31 of the hose 34.

The resistance value (input R) of the current variable means 1 that changes when the cursor 42 is operated by the user and the output (2) of the differential amplification means 13 are as shown in FIG. 6 (2) or 7.
There is a relationship as shown in Figure (a) ((5), and the larger the input R is, the smaller the output I is.
The timing, that is, the phase angle (output
), there is a relationship as shown in FIG. 60. Therefore, as shown in FIG. 70, as the input R of the current variable means 1, that is, the resistance value becomes larger, the output mt of the trigger means 14, that is, the phase angle becomes larger.
input becomes smaller. For example, when the output ■ is QIS, it becomes the maximum input, and when it is 51s, it becomes the minimum input, and this minimum input is around 200W. In this way, the user
The input to the electric blower 7 can be arbitrarily adjusted depending on the object to be cleaned, such as a carpet, floor/folding, sofa-curtain, etc.

On the other hand, when, for example, a pressure sensor is connected to the terminal C1D, that is, when the external signal input is not 0, the calculating means 52 calculates the output of the differential amplifying means 13 and the external signal, and outputs the result. The signal is output to the trigger means 14. - As an example, see Figure 6 (graphs of υ Vl, V2, V
3, as shown by V4, the calculation means 52 changes the amplification factor of the output (2) of the calculation means 52 with respect to the output (2) of the differential amplification means 13, depending on the magnitude of the external signal. That is,
If the amplification factor is as shown in the graph v1t', the output ■ of the trigger means 14 can reach Oes as shown by the broken line in the sixth figure, but if the amplification factor is as shown in the graph v2
If it is as shown in Figure 6, the output m cannot reach Qms as shown by the solid line in Figure 6, and the output m of the differential amplifying means 13 will be lower than the maximum case shown in graph ■1. The input to the electric blower 7 decreases at each output. In this way, in addition to the control according to the operation of the cursor 42 by the user, the electric blower 7 is controlled according to the external signal from the pressure sensor.
is automatically controlled by i11.

In addition, as the calculation in the calculation means 52, addition or subtraction between the external signal and the output (2) of the differential amplification means 13 is also possible. In addition, as shown by the solid line in Fig. 7,
The external signal input S and the output ■ of the calculation means 52 are directly proportional,
Output H for input S according to the output of differential amplification means 13
The amplification factor may be changed. On the other hand, as shown by the broken line in FIG. 7, the amplification factor of the output (2) with respect to the input S may be made negative so that the input S and the output (2) are in an inversely proportional relationship. In these cases, the input to the electric blower 17 is within a range of less than or more than a certain value determined by the output of the differential amplifying means 13 corresponding to the position of the cursor 420.
υ1 will be done immediately. That is, in response to the setting of the position of the cursor 42, the input of the electric blower 7 becomes automatic ATV within a specific range.
controlled. Further, the range of tIll[I of the input of the 'ixe blower 7 corresponding to the output I of the differential amplification means 13 may have a constant width. Furthermore, as shown in Figure 7 ■, in a small range of the external signal input S, the output ■ changes to the input S.
The output (2) may be proportional to, and the output (2) will be a constant value regardless of the input S in a large range, and this constant value may change depending on the output (2), so that the range of change of the output (2) may change. In this case as well, the maximum value of the output ■ is determined depending on the position of the cursor 42.

Moreover, what is connected to terminals C and D is not limited to pressure sensors. For example, in order to increase the input to the electric blower 7 when the suction port body 39 is grounded and to decrease the input when the suction port body 39 is lifted, a pressure sensor may be formed of a switch that detects the grounding of the suction port body 39. In addition, the suction port body 39
In order to increase the input when pushing and decrease the input when pulling, it may be a sensor that detects the running direction of the suction port body 39.

According to the above configuration, switching between models that use external signals for automatic control and models that do not use terminals C,
This can be done by simply connecting a pressure sensor or the like to D, and in mass production there is no need to provide a jumper wire or the like on the circuit board for switching, resulting in good manufacturability and low cost.

Next, a second embodiment of the present invention will be described based on FIG. 4.

In this embodiment, the characteristic changeover switch 56 is included in the calculation means 52.
has been established. This characteristic changeover switch 56 has a difference aJ!
This is for switching the positive or negative amplification factor of the output of the calculation means 52 with respect to the output of the width means 13. That is, when the characteristic changeover switch 56 is switched to the changeover terminal a, the sixth
As shown in figure (e), the amplification factor becomes positive and the difference! l] The output (2) of the calculation means 52 is directly proportional to the output I of the amplification means 130. On the other hand, when the switch 56 is switched to the switching terminal, the amplification factor becomes negative and the output I
The relationship between and the output ■ becomes inversely proportional. In either case,
Depending on the magnitude of the external signal input, the amplification factor changes as shown by the solid line and broken line graphs.

In addition, addition and subtraction between the external signal input in the calculation means 52 and the output of the differential amplification means 13 may be switched. Furthermore, as shown by the solid line graph J3 and the broken line graph in FIG.

By the way, l! In order to deal with the problem of filter dust clogging and improve the cleaning ability, it is necessary to reduce the pressure in the air path between the dust collection filter in which the pressure sensor is installed and the electric blower 7. The input of the electric blower 117 must be increased accordingly. On the other hand, in order to prevent the suction port body 39 from adhering to the object to be cleaned and improve operability, the input must be reduced as the pressure decreases. However, according to the above configuration, in response to the decrease in external signal input from the pressure sensor, electric air blowing is performed!
It is possible to easily switch between decreasing and increasing the input of 17, and it is possible to provide a variety of seeds according to the user's preference. Note that it may be possible for the user to switch.

As described above, according to the above configuration, in contrast to the conventional automatic control using pressure sensors and the like during removal, where it was not possible to easily convert the input/output characteristics to the inverse characteristics, the characteristics can be easily and inexpensively inverted. Become so.

Next, a third embodiment of the present invention will be described based on FIG. 5.

In this embodiment, in the current variable means 1 of the hose 34, the resistance pattern 2b on which the slider 2a of the variable resistance 2 slides
A non-resistance pattern 61 is provided on an extension of the line. Further, a resistor 3 is connected in parallel with the resistor pattern 2b, and a resistor 62 is connected between the connection point of the resistor pattern 2b and the resistor 3 and the non-resistance pattern 61.

When the slider 2a is on the resistance pattern 2b, the resistance value between the variable resistor 2 and the resistor 3 is as low as 0 to 15 Ω, for example, while the resistance value of the resistor 62 is 500 Ω, for example. It has a high resistance value of 0th place.

On the other hand, in the control 2I1 section 5 of the vacuum cleaner main body 31, the external input means 51 and the calculation means 52 are connected to the comparison determination means (1 ) 64. Further, the output terminal of the differential amplification means 13 is connected to the input terminal of the comparison and discrimination means (2) 65, and the output terminal of this comparison and discrimination means (2) 65 is connected to the comparison and discrimination means (1) 64. ing. This comparison and determination means (2>65) compares the output voltage from the differential amplification means 13 with the reference voltage to determine whether the resistance value of the current variable means 1 is around 50KΩ or not, for example, 450 to 550KΩ.
If it is within the range, the switch 63 of the comparison/determination means (1) 64 is closed, and if it is outside the range, the switch 63 is opened.

Then, when the slider 2a is on the resistance pattern 2b in the current variable means 1, the resistance value between the terminals A and B is 0 to 1.
5 and Ω, the output of the differential amplification means 13 is outside the setting range when the resistance value is 450 to 550 Ω.
) 64 switch 63. As a result, the external signal input from the external input means 51 is not input to the calculation means 52,
The output of the differential amplification means 13 is directly outputted to the trigger means 14. That is, the electric transport II rock 7 is controlled only manually.

On the other hand, by retracting the cursor 42 to the maximum extent, i! l! When the child 2a is on the non-resistance pattern 61, the resistance between the terminals A and 8 is approximately 500Ω.

Therefore, the comparing and determining means (2) 65 determines that the output from the difference all amplifying means 13 is within the set range, and closes the switch 63. As a result, a signal input from a pressure sensor or the like is input to the calculation means 52 via the external input means 51° switch 63, and the electric blower 817 is turned on in response to the external signal.

By the way, depending on the calculation in the calculation means 52, for example, the input of the electric blower vs7 may be such that the resistance value between the terminals A and B is 1.
If the input power is set to be 200 W, which is the lowest when the resistance is 5.Ω, the input may be several watts when the resistance is 500.Ω, and there is a possibility that the electric blower 7 may stop. In order to eliminate such a fear, in addition to performing appropriate amplification in the calculation means 52, it is necessary to apply an external signal to the trigger means 14 from the external input means 51 without inputting an external signal from a pressure hinger or the like to the terminals C and D. If so, an output may be output such that the input of the electric feeder 7 becomes the set minimum input.

According to the above configuration, since the external signal input from the pressure sensor etc. is automatically turned on or off according to the resistance value of the current variable means 1, the user can easily select whether or not to fj self-help t+1III. be able to. In addition, in order to identify whether or not automatic control is to be performed in the control unit based on the difference in resistance value of the Ti flow variable means operated by hand VJ, for example, the output of the pressure sensor is a voltage, so that the resistance value can be changed. Although it is necessary to convert it into a voltage for switching, according to the above configuration, since the resistance value of the current variable means 1 is outputted as a voltage from the differential amplification means 13, the Through processing, it is possible to switch between automatic control and manual control without using a separate circuit for converting to voltage, and the configuration of connections etc. can be simple, inexpensive, and compact.

(Effect of the invention〕 According to the present invention, the following effects can be obtained.

The vacuum cleaner according to claim 1 includes a current variable means, a conversion means for converting the current from the current variable means into a voltage, a differential amplification means for amplifying the output of the conversion means, an external input means, and Calculating means for calculating the external signal from the external input means and the output of the differential amplifying means, and a triggering means for outputting a trigger output for electric transmission JI I control according to the output of these calculating means or the differential lJ amplifying means. If there is no external signal Otsuki, the output from 1 to 1 depends only on the output of the differential amplification means.
Since the trigger means works, the electric blower is white! It is easy to change between a model that uses an external signal for JJ or one shot, and a model that does not, and it is easy to manufacture, is inexpensive, and is advantageous in terms of mass production.

Furthermore, the electric crusher according to claim 2 is provided with a comparison and determination means that determines whether or not the output of the differential amplification means is within a set range and does not input an external signal to the calculation means when it is outside the range. Therefore, the user can perform automatic υJI using external signals.
It is possible to easily select whether or not to perform IB, and in particular, by making the determination based on the output of the difference vJlt'1 width means, the configuration for the selection can be made simple, inexpensive and compact.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the electric fault type of the present invention,
Fig. 2 is a perspective view of the same as above, Fig. 3 @0 is a plan view and side view of the grip tube as above, Fig. 4 is a circuit diagram showing a second embodiment of the present invention, and Fig. 5 is a third embodiment of the present invention. FIGS. 6 and 7 are circuit diagrams showing an example of the present invention, and FIG. 8 is a circuit diagram showing an example of a conventional vacuum cleaner. 1... Current variable means, 5... l+11111 part, 7...
Electric transmission +ita, 8... Triac as power υ control means, 12... DC power source means, 13... Differential amplification means, 14... Trigger means, 20... Conversion means, 21... Multiplying means, 51. - External input means, 52... Calculation means, 6
4... Comparison and discrimination means (1), 65... Comparison and discrimination means (2
). 15 miles

Claims (2)

[Claims] (1) An electric blower, a control section for controlling the electric blower, and a current variable means for operating the electric blower connected to the control section, the control section supplying electric power to the current variable means. a DC power source means for controlling the current, a converting means for limiting current between the ground power source and converting the current from the current variable means into a voltage, a multiplying means for adjusting the input of the converting means, and an output of the converting means. differential amplification means for amplifying the current, and external input means for inputting an external signal from a source other than the current variable means;
a calculation means for calculating an external signal from the external input means and the output of the differential amplification means; a trigger means for outputting a trigger output according to the output of the calculation means or the output of the differential amplification means; and a power control means connected in series with the electric blower and operated by a trigger output from the trigger means, and when the external signal is not input, the trigger means operates only according to the output of the differential amplification means. A vacuum cleaner characterized by: (2) The control unit determines whether the output of the differential amplification means is within a certain set range or not, and when the output is outside the set range, the control unit does not input the external signal from the external input means to the calculation means. The vacuum cleaner according to claim 1, further comprising determining means.