JPH03254722A - Electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent the flow of a large flush electric current at start by stepwise increasing the input value in each certain time, from the min. input value within the control range by an operating means in a control means for a motor- driven blower to the input value selected by the operating means. CONSTITUTION:The control output of a control means 42 is stepwise selected by an operating means 43 operated by a user, while the control means 42 controls the input of a motor-driven blower 41 by the selected control output, and the input value of the motor-driven blower 41 is stepwise selected. When the motor-driven blower 41 starts, if the selection value of the control output of the operating means 43 is a certain input value larger than the min. input value of the motor-driven blower 41 e.g. the largest input value, the control means 42 increases the input value stepwise at each time from the min. input value within the control range by the operating means 43 to the selected input value by the operating means 43. Accordingly, the flow of the large flush electric current can be prevented, and the reduction of the voltage of an electric power source is prevented, and the bad influence applied to other electric equipment is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vacuum cleaner, and particularly to control at the time of starting an electric blower.

(Prior art) For example, as described in Japanese Patent Application Laid-open No. 64-64615, the input of an electric blower in the vacuum cleaner body can be variably controlled by a control means, and the control output of this control means is used for one suction. A vacuum cleaner is known in which the selection is possible using an operating means provided at the hand of the hose or the like. In particular, in the vacuum cleaner described in the above-mentioned publication, the control output can be selected in stages from several preset values using a plurality of switches of the operating means. And this type of conventional vacuum cleaner, when the electric blower is stopped,
Even when the operating means selects a control output that maximizes the input value of the electric blower, the control output of the control means suddenly corresponds to the maximum input value.

However, with this conventional structure, when the maximum input value is selected by the operating means, especially when the maximum input value is directly selected from a state where the electric blower is stopped, a large input current (rush current) flows. Power fluctuations occur. This rush current increases as the level of the maximum human power value increases. When such a large rush current flows, the voltage of the power supply that supplies power to the electric blower will drop, and the voltage to other electrical devices that are supplied with power from the same power supply will also drop. Otherwise, the operation of other electrical equipment may become unstable. The operation of other electrical equipment becomes unstable as the voltage drop increases, but in the worst case, electrical equipment that has a built-in microcomputer that performs control operations may become uncontrollable, that is, the microcomputer's program may become unstable. There is a risk that the product will not function properly. Along with this, the amount of load on main control elements such as bidirectional thyristors that control the motor of the electric blower also increases when the electric blower is started.

Therefore, in order to reduce the rush when turning ON and OFF as described above, when the maximum input value is selected with the electric blower OFF or stopped, the input value of the electric blower is gradually increased from OV to the maximum human power value. A vacuum cleaner has been developed that incorporates a slow start mechanism to increase the speed. Conventional slow start mechanisms are made up of complex analog circuits and are designed exclusively for starting up the electric blower, so they can control the human power value of the electric blower regardless of the input value selected during cleaning. It was supposed to increase continuously.

However, such a conventional slow start mechanism requires a special circuit, which increases cost and may have a negative effect on functionality.

(Problem to be Solved by the Invention) As described above, in conventional vacuum cleaners, a large rush current flows, especially when the maximum input value of the electric blower is selected by the operating means from a state where the electric blower is stopped. Therefore, there was a problem that it adversely affected other electrical equipment being used on the same power line.

Also, even if a vacuum cleaner is equipped with a slow start mechanism to prevent large rush currents from flowing,
Conventionally, the slow start mechanism was constructed using a special analog circuit, which caused problems such as increased costs.

The present invention aims to solve these problems, and can be easily implemented with a simple structure and without the need for special circuits.
A first object of the present invention is to provide a vacuum cleaner that can prevent a large rush current from flowing by delaying the increase in the input value when the electric blower is started.

A second object of this vacuum cleaner is to enable the delay in increasing the input value of the electric blower to be appropriately adjusted depending on, for example, the state of the power supply line.

Furthermore, a third object of the present invention is to prevent the delay in increasing the input value of the electric blower from being unnecessarily delayed when the electric blower is already activated.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the first object, the vacuum cleaner according to claim 1 of the present invention includes an electric blower communicating with the dust collecting section and an input of the electric blower. The control means includes a control means and an operation means for selecting a control output of the control means in a stepwise manner, and the control means is configured such that the selection of the control output by the operation means at the time of starting the electric blower is lower than the lowest input value of the electric blower. When the input value is higher than a certain value, for example, the maximum input value, the input value is increased step by step for a certain period of time from the lowest input value in the control range by the operating means in the control means to the input value selected by the operating means. It is intended to increase

In addition, in order to achieve the second object, the vacuum cleaner according to the second aspect of the present invention includes an arrival time variable means for varying the time taken to reach the input value selected by the operating means.

Furthermore, in the vacuum cleaner according to claim 3, in order to achieve the third object, the control means controls the current time by the operating means at a preset time according to the input value selected last time by the operating means. The input value is increased up to the selected input value.

(Function) In the vacuum cleaner according to claim 1 of the present invention, the operating means operated by the user selects the control output of the control means in a stepwise manner, and the control means controls the electric blower with the selected control output. The input value of the electric blower is thereby selected in stages. When the electric blower is started, if the control output selected by the operating means is an input value greater than a certain value higher than the minimum input value of the electric blower, for example, the maximum input value, the control means controls the control output of the control means. The input value is increased stepwise over a predetermined period of time from the lowest input value in the control range by the means to the human power value selected by the operating means. This prevents large rush currents from flowing and prevents voltage drops in the power source that the electric blower is powered by, which could adversely affect other electrical equipment powered by the same power source. This will be prevented.

Further, in the vacuum cleaner according to the second aspect of the present invention, the arrival time variable means varies the time taken to reach the input value selected by the operating means, such as when starting the electric blower. For example, in homes where the capacity of the power source used is small, the rush current can be made smaller by increasing the time it takes to reach the selected input value.On the other hand, in homes where the capacity of the power source used is large, It is better to shorten the time it takes to reach the selected input value.

Furthermore, in the vacuum cleaner according to claim 3, when the input value equal to or greater than the certain predetermined value is selected by the operating means, the control means operates at a preset time according to the input value previously selected by the operating means. , increases the input value to the currently selected input value.

Here, for example, if the previously selected input value is not 0, that is, if the electric blower has already been started, the time it takes to reach the selected input value will be shorter than when the electric blower is started. , the delay in increasing the input value is not unduly slow.

(Embodiment) Hereinafter, the structure of a first embodiment of the vacuum cleaner of the present invention will be described based on FIGS. 1 to 7.

In FIG. 6, reference numeral 1 indicates the vacuum cleaner body, and the vacuum cleaner body 11 has a dust collection chamber with a built-in filter as a dust collection section in the front part. An electric blower communicating with the dust collection chamber is provided at the rear.A rotatable handle 12 is provided on the top surface of the vacuum cleaner main body 11, and a rotatable handle 12 is provided at the inside of the handle 12. , a display means 13 consisting of a light-emitting display or the like is provided as a power meter for displaying the input value of the electric blower.
A suction port 14 communicating with the dust collection chamber is formed on the top surface of the dust collection chamber 1 . Then, a hose 16 is connected to this suction port 14.
One end of the hose 16 is detachably connected, and a suction port body 19 is detachably connected to a handle portion 17 provided at the other end of the hose 16 via an extension pipe 18.

Further, the hand portion 17 of the hose 16 is provided with a hand operation portion 21, as shown in FIG. This hand control unit 21 includes a push button switch 22 with a "strong" display for operating the electric blower with a large input value, and a "medium switch" display for operating the electric blower with a medium input value. A push-button switch 23 with a display, a push-button switch 24 with a "weak" display for operating the electric blower with a small input value, and a push-button switch 24 with a "off" display for stopping the electric blower. 25, and a push button switch 26 for turning ON/OFF the rotary brush driving electric motor built into the suction port body 19. Along with this, each of these switches 22, 23. Indicators 27, 28 and 29, 30 are respectively located in the vicinity of 24 and 26 to display the selected input value of the electric blower or the ON/OFF state of the rotary brush driving electric motor. ing.

Next, the outline of the configuration of the electric circuit will be explained based on FIGS. 1 and 2.

As shown in FIG. 1, one pole of an AC power source 40 such as a household 100V AC power source is connected to one end of an electric blower 41 and a terminal M of a control means 42 such as a microcomputer. The other end of the electric blower 41 is connected to T2, and the terminal TI of the control means 42 is connected to the other pole of the AC power source 40. In addition, the hose 1
The switch 22 provided on the hand operation unit 21 of 6. ...
, 25, etc. are connected to the terminals RMI, RM2 of the control means 42. The control means 42 controls the input to the electric blower 41. On the other hand, the operating means 43 is for selecting the control output of the control means 42 step by step, and is for sending a command to the control means 42 so as to obtain the desired control output content.

The control means 42, as shown in FIG.
It has input selection means 44 connected to MI and RM2, input increase delay means 45, and control output means 46 connected to the terminal T2. In addition, the control means 42 includes a main control element such as a reverse blocking three-terminal thyristor or a bidirectional thyristor connected in series between the power source 40 and the electric blower 41, and this main control element By being controlled, the human power of the electric blower 41 is changed. The control output means 46 then provides a trigger signal to the main control element as a control output. Further, the input selection means 44 causes the operation means 43 to select a trigger signal from the control output means 46. For example, the input selection means 44 is a switch 2 of the operation means 43.
It has a storage means whose contents are rewritten in accordance with the operations of 2, . The element is now triggered.

In this way, the push button switch 22 of the operating means 43, -
. . , 25 are operated, each of these switches 22 . . That is, for example, when controlling the input of the motor of the electric blower 41 by phase control of a main control element such as a bidirectional thyristor, each switch 22. ..., strong, medium, by 24 press operations.
In response to the weak input value selection, the control output is selected and the trigger level value a for the main control element is 501 60
+ b 50 + b 60 + C50 + C60 is set. Here, the trigger level value a50+...
・+C60 is the time from 0■ to ON for every half cycle of the power supply 4θ in phase control, and when the frequency of the power supply 40 is 501g, 0≦a. <b, 0<
When C50<10111.60Hs, 0≦a, o
<b60<C60<8.33+++s. 5
For 01(! and 60Hx, the trigger level value a,.,・
...+C60, 5oH! and 6Ht to achieve equivalent operation.

Further, the input increase delay means 45 controls the start-up control output means 46 of the electric blower 41, and when the control output selected by the operation means 43 is the maximum input value of the electric blower 41, the control means 42 The input value is increased stepwise over a fixed period of time from the lowest input value in the control range by the operating means 43 to the input value selected by the operating means 43. That is, when the strong push button switch 22 is operated while the electric blower 41 is stopped,
First, the trigger level value c. Or, after the T electric blower 41 is operated for a predetermined time at C60, the trigger level value is set. Alternatively, at b'60, the T electric blower 41 is operated for a predetermined period of time, and then the electric blower 41 is operated at the selected trigger level value a50 or a60. Here, both of the predetermined times T are set around 150 to 5 (fi1 ms), and both Ts are set to 300 to 10 ms in total.
A value of around 100O is standard. This value is for electric blower 4
This setting is made so that a large rush current does not flow at the time of startup of the motor.

Such control at the time of starting the electric blower 41 is performed, for example, by a program in a microcomputer that constitutes the control means 42.

Next, the process when the electric blower 41 is controlled by the microcomputer will be explained with reference to the flowcharts of FIGS. 3 and 4.

As shown in FIG. 3, after the power is turned on, initialization is first performed and each initial value is set (step 2). At this time, the stored contents of the storage means of the input selection means 44 correspond to turning off the electric blower 41. Next, the switch 22 of the operating means 43 for selecting an input value
．． ..., 25 is read (step ■)
. Before that, select one of the switches 22. ..., 25 is pressed by the user, the input selection means 44
The stored contents of the storage means are stored according to the operated switch 22.・
..., 25, but the previously operated switch 22. . . , 25 are also retained.

And switch 22. . . , the selected input value is determined in step 25 (steps ■, ■).

■). Here, if the selected input value is strong, that is, the maximum human power value, after the input increase delay processing (step ■) is performed, the strong input processing (step ■) is performed, and the selected input value is If so, medium input processing (step ■) is performed, and if the selected input value is weak, that is, the lowest input value, weak input processing (step ■) is performed. In each input process (steps ■, ■, ■), respectively,
Trigger level value is 850+” 60+ b50
+b60 or C50+C60, and thereafter the electric blower 41 is operated at strong, medium or weak manual power values. If the selected input value is not strong, medium, or weak, the selected input value is off, that is, O, so the electric blower 41 is stopped (step [phase]). Step ■
,■.

■ After 0, return to step ■.

In this way, the input value of the electric blower 41 is selected step by step by the operating means 43.

As shown in FIG. 4, in the input increase delay process (step ■), it is determined whether the strong input value selection is from a state in which the electric blower 41 is stopped (step 0). . If the selection is made while the electric blower 41 is stopped, first, the trigger level value C
After the T electric blower 41 is operated for a predetermined time at 1° or C60 (step 0), the T electric blower 41 is operated for a predetermined time at a trigger level value b50 or b60 (step ◎), and then the electric blower 41 is selected. is operated at the trigger level value a50 or a6O (step [
phase]).

On the other hand, if the input value of strong is selected while the electric blower 41 has already been activated, the process immediately proceeds to step (2).

Therefore, when the process shown in the flowchart of FIG. 3 is repeated after a strong input value is selected, the stored contents of the storage means of the input selection means 44 are read as corresponding to the strong input value. Steps (2) and (2) are not performed every time, and the slow start by step O9 (2) is performed only when the electric blower 41 is started.

Thus step 0. While (2) is being executed, the activation of the electric blower 41 crosses a peak without a large rush current flowing, and the current flowing through the electric blower 41 reaches a steady current range. Therefore, when the electric blower 41 is started, the voltage of the power supply 40 to which the electric blower 41 is supplied with power is prevented from decreasing, and other electric devices receiving power from the same power supply 40 are prevented from being adversely affected. is prevented. At the same time, the load on the main control element for controlling the electric blower 41 can also be reduced.

Moreover, according to the above configuration, at the time of slow start, data is read one after another within the microcomputer program, and the trigger level value C50+C taken during cleaning is determined.
60+ b 50+ b 60 sequentially electric blower 4
1 is operated, a special slow start circuit is not required, and the structure is simple and can easily prevent generation of large rush current when starting the electric blower 41, resulting in cost reduction.

Note that if you set a particularly low input value for slow start, the electric blower 41 may not start, but as mentioned above, if you start the electric blower 41 with the lowest input value selected during actual cleaning, There is no risk that the electric blower 41 will not start, and from this point of view as well, it is advantageous to increase the input value from the lowest input value in the control range of the operating means 43 in the control means 41.

Next, a second embodiment of the present invention will be described based on FIGS. 8 and 9.

In this embodiment, as shown in FIG. 8, arrival time variable means 51 is added to the control means 42.

The arrival time variable means 51 receives input from the input means 52 and varies the time taken to reach the maximum input value selected by the operating means 43 when the electric blower 41 is started. Note that the input means 52 is, for example, a sixth
As shown in the figure, a setting device 53 such as a knob or button is provided on the top surface of the cleaner body 11.

Then, as shown in FIG. 9, in the input increase delay process (step ■), the strong input value selection is
1 is from a stopped state (step ■), and if the electric blower 41 is from a stopped state, the electric blower is turned on at a lower input value until the maximum input value is reached. It is determined whether a predetermined time T for operating the blower 41 is set in the program (step 0).

Here, if the predetermined time T has not been set, the process moves to the arrival time setting routine, has the user or vendor set the predetermined time T using the input means 52, and sets the predetermined time T1 that has been input. After determining T2, T3, and T4 (
Step 0. ■, [phase]), specified time T on the program
,,T2. I set T3 and T4 (step ■,
@, @, @), return to step 0. In addition, T
r, T2, T3, and T4 are different values.

Next, after the electric blower 41 is operated for a predetermined period of time set as described above at the trigger level value C6° or C6° (step 0), the electric blower 41 is operated as described above at the trigger level value b50 or b60. The electric blower 41 is operated for a predetermined time T (step 0), and then the electric blower 41 is operated at the selected trigger level value aso or a60.
(Step ■).

Other processing is the same as in the first embodiment.

Here, how to specifically set the predetermined time T will be explained.

The standard setting for the time required to reach the maximum input value when starting the electric blower 41, that is, the appropriate setting for a home where the capacity of the power source 40 is set to a standard value, In the case of a small home, etc., there is a possibility that the rush current will not be sufficiently reduced. Therefore, if the state of the power source 40 is not stable enough, such as in a home where the capacity of the power source 40 used is small, the effect of reducing rush current can be improved by increasing the time required to reach the maximum input value. Become. On the other hand, in homes where the power source 40 used has a large capacity, it is preferable to shorten the time it takes to reach the maximum input value. That is, it is preferable to take this time unnecessarily long so that the response of the electric blower 41 to the operation of the switch 22 is not unnecessarily delayed.

As described above, according to the configuration of the second embodiment, by selecting the time to reach the maximum human power value, the start-up delay of the electric blower 41 until the maximum input value is reached, for example, according to the state of the power line. can be adjusted appropriately.

Next, a third embodiment of the present invention will be described based on FIGS. 10 and 11.

In this embodiment, as shown in FIG.
A minimum input variable means 56 is added.

The minimum input variable means 56 receives an input from the input means 57 and changes the minimum input value within a range that can be controlled by the control means 42 using the operating means 43.

The human power means 57 is provided as a setting device 53 such as a knob or a button on the upper surface of the cleaner body 11, for example, as shown in FIG.

Then, as shown in Figure 11, the manpower increase delay process (
In step ■), it is determined whether the strong input value selection is from a state where the electric blower 41 is stopped (step o), and whether the input value selection of strong is from a state where the electric blower 41 is stopped or not is determined. For example, it is determined whether a trigger level value C corresponding to the minimum human power value is set in the program (in step). Here, if the trigger level value C has not been set, the process moves to the trigger level value setting routine, has the user or vendor set the trigger level value C using the input means 57, and inputs the input trigger level value CIr. After determining C2+ C3r04 (steps ■, ■, ■) and setting ell C21Cal C4 for a predetermined time on the program (steps ■, ■, ■, @), step [phase]
Return to Note that CI r 02 + 03 + 04 is a different value, but it must be a value that allows the electric blower 41 to be started.

Thereafter, the electric blower 41 is operated for a predetermined time T at the trigger level value C thus set (step 0).

According to the configuration of the third embodiment, as in the case of the second embodiment, the trigger level value C corresponding to the lowest input value, which is the starting point for slow start, is selected and this trigger level value C is set. By lowering it accordingly, if necessary.
The effect of reducing rush current can be enhanced. Moreover, since the trigger level value C itself is lowered, the rush current reduction effect can be made greater than in the second embodiment, and a more sufficient effect can be obtained.

Next, a fourth embodiment of the present invention will be described based on FIGS. 12 and 13.

In this embodiment, the input increase delay means 45 of the control means 42
However, the input value of the electric blower 41 is increased to the input value selected this time by the operating means 43 at a preset time according to the input value selected last time by the operating means 43. That is, in this fourth embodiment, even if the maximum input value is selected while the minimum input value was selected last time, the input increase is delayed; The time to reach the maximum input value will be shorter if the maximum input value is selected when the minimum manual force value has been selected than when the maximum input value is selected from a stopped state. ing. Further, in this fourth embodiment, the electric blower 41
Even when an intermediate input value is selected from a state where the input value is stopped, the input increase is delayed.

That is, as shown in FIG. 12, if the selected input value is the maximum input value, input increase delay processing (step ■) is performed.
is performed, strong input processing (step ■) is performed, but even when the selected input value is medium, input increase delay processing (step 0) is performed, and then medium input processing (
Step ■) is performed.

In the input increase delay processing of step (■), first, it is determined whether the maximum input value is selected for the first time or not.
That is, it is determined whether the previous human power value was also the maximum input value (step 0). If the maximum input value is to be selected again, go to step ■ immediately without going through steps @ and ◎. On the other hand, if the previous input value was not the maximum input value, it is determined whether the selection of the maximum input value was from a state in which the electric blower 41 was stopped (step 0).

If the selection is made while the electric blower 41 is stopped, the predetermined time T during which the electric blower 4I is operated at a lower input value until the maximum input value is reached is set to T1 (
After step 0), trigger level value C50 or C60
The electric blower 41 is operated for a predetermined period of time (step 0).
) along with the trigger level value. Or, in b60, the electric blower 41 is operated for a predetermined time T (step 0), and then the electric blower 41 is set to the selected trigger level a.
,. or a6(l) (step O).

Further, if the input value selected last time is medium or weak, it is further determined whether the human input value selected last time was weak, that is, the lowest input value (step 0), and if it is the lowest input value, After setting the predetermined time T to T2 (step 0), the process proceeds to step O. On the other hand, if it is determined in step 0 that the previously selected input value is not the lowest input value, that is, if the previously selected input value is within the range, the process immediately proceeds to step (2).

Although a flowchart is not shown in the input increase delay processing of step ◎, if the selection is made from a state in which the electric blower 41 is stopped, the electric blower 41
After being operated for a predetermined time at the lowest input value, this electric blower 41 is operated at the middle input value. At this time,
The time it takes to reach the selected input value may be shorter than the time it takes for the electric blower 41 to reach the maximum input value from a stopped state.

According to the configuration of the fourth embodiment, when the previously selected input value is not 0, that is, when the electric blower 41 has already been started, it takes longer to reach the selected input value than when the electric blower 41 is started. Since it is shorter, the delay in increasing the input value does not become unnecessarily slow. That is, the increase in input value is delayed for an appropriate time, and rush current can be effectively reduced without impairing usability.

Note that it is also possible to combine the configurations of the second to fourth embodiments.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

In the vacuum cleaner according to claim 1, when the electric blower is started, if the control output selection in the operating means is a certain value or more that is higher than the lowest input value of the electric blower, the control output is selected by the operating means in the control means. Since the human power value is increased step by step over a certain period of time from the lowest input value in the control range to the input value selected by the operating means, it is possible to prevent a large rush current from flowing when starting the electric blower, and the Voltage fluctuations in the power supply to which the blower receives power can be reduced, and electrical equipment being used on the same power line can be prevented from being adversely affected. Moreover, since the input value originally set for selection by the operating means is used, there is no need to provide a special analog circuit for slow start, and rush current can be easily reduced with a simple structure, reducing costs. can.

Furthermore, since the vacuum cleaner according to claim 2 has a reaching time variable means for varying the time taken to reach the input value selected by the operating means, it is useful, for example, in homes where the capacity of the power source used is small. Then, by increasing the time it takes to reach the selected input value, and in homes where the capacity of the power source used is large, by shortening the time it takes to reach the selected input value, the electric power The delay in increasing the input value of the blower can be appropriately adjusted.

Furthermore, in the vacuum cleaner according to claim 3, the input value is increased to the input value selected this time by the operating means in a preset time according to the input value selected last time by the operating means, so that the electric blower is activated. By shortening the time it takes to reach the selected input value than when starting the electric blower, the delay in increasing the input value will not be unnecessarily delayed, and the user-friendliness will not be compromised. Rush current can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electric circuit showing a first embodiment of the vacuum cleaner of the present invention, and FIG. 2 is a block diagram of the same control means.
FIG. 3 is a flowchart of the same as above, FIG. 4 is a flowchart of input increase delay processing of same as above, FIG. 5 is a table showing the relationship between input value selection and trigger level value of above, FIG. FIG. 7 is an external plan view of the upper operating section, FIG. 8 is a block diagram of the control means showing a second embodiment of the present invention, FIG. 9 is a flowchart of the input increase delay process, and FIG. A block diagram of the control means showing the third embodiment; FIG. 11 is a flowchart of the input increase delay process as described above; FIG. 12 is a flowchart of the fourth embodiment of the present invention; FIG. 13 is a flowchart of the input increase delay process as described above. It is. 41. Electric blower, 42. Control means, 43. Operation means, 51. Arrival time variable means. -11 1 penalty l drunkenness

Claims (3)

[Claims] (1) It has an electric blower communicating with the dust collection section, a control means for controlling the input of the electric blower, and an operation means for selecting the control output of the control means in a stepwise manner, and the control means includes the above-mentioned control means. If the selection of the control output by the operating means at startup of the electric blower is an input value greater than a certain value that is higher than the lowest input value of the electric blower, the control output is selected from the lowest input value of the control range by the operating means in the control means. A vacuum cleaner characterized in that the input value is increased stepwise by a certain period of time up to the input value selected by the means. (2) The vacuum cleaner according to claim 1, further comprising a reaching time variable means for varying the time taken to reach the input value selected by the operating means. (3) The control means increases the input value up to the input value selected this time by the operation means at a preset time according to the input value selected last time by the operation means. The vacuum cleaner described in 1 or 2.