JP4509665B2 - Vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner that drives an electric blower based on a set value output from an operation unit.

Conventionally, this type of vacuum cleaner includes a vacuum cleaner body that houses an electric blower. In the main body of the vacuum cleaner, a hose body, an extension pipe and a floor brush are sequentially connected to the suction side of the electric blower, and an operator sets the drive mode of the electric blower by a pulse current at the tip of the hose body A handy operation unit with a setting button is provided. In addition, a control circuit is provided in the vacuum cleaner main body so that the hand operating unit is electrically connected via a transmission line. Further, the control circuit detects a current value due to an operation of the hand operation unit, and determines an input operation to the hand operation unit based on whether or not the current value exceeds a plurality of preset threshold values. And this control circuit is the setting value detected by the control circuit when the noise entered the setting value output from the hand control unit or the transmission line is short-circuited, and the short-circuit state of the preset transmission line The control means ignores the detected set value when the extreme threshold value, which is the current value at, is exceeded (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-42089 (page 3, Fig. 5-6)

  However, the above-described vacuum cleaner has a problem in that, if noise or the like is mixed in the current value within a range that does not exceed the extreme threshold, the current value may erroneously discriminate the set value output from the local operation unit. is doing.

  The present invention has been made in view of such a point, and an object thereof is to provide a vacuum cleaner that can prevent erroneous determination of a set value output from an operation unit.

According to the present invention, control means for driving the electric blower based on the setting value output from the operation unit that outputs a setting value for setting the driving state of the electric blower by operation is output from the operation unit by operation of the operation unit. A first control for sampling the set value a predetermined number of times, a second control for extracting a maximum value and a minimum value from the sampled values and obtaining a difference between them, and a maximum value obtained by the second control a third control for differences compared with a predetermined threshold magnitude of the minimum value, when the difference between the maximum value and the minimum value in the third control is greater than a predetermined threshold, among the predetermined number of times of sampling values The first control discards the first sampled value and performs the fourth control to newly sample the set value output from the operation unit and return to the second control .

According to the present invention, when the setting value output by the operation of the operation unit is sampled a predetermined number of times and the difference between the maximum value and the minimum value extracted from these sampled values is greater than a predetermined threshold value. , Discarding the first sampled value among the values sampled a predetermined number of times, newly sampling the set value output from the operation unit and newly extracting the difference between the maximum value and the minimum value, so it was output from the operation unit next it ignores the control unit the set value, such as noise to the set value outputted from the operation unit even in such case that has entered, it is possible to prevent erroneous determination of the set value.

  Hereinafter, the configuration of a vacuum cleaner according to an embodiment of the present invention will be described with reference to the drawings.

  In FIG. 2, reference numeral 1 denotes a cleaner body, and an electric blower 2 is accommodated in the cleaner body 1. The vacuum cleaner main body 1 is a so-called canister-type vacuum cleaner, and dust sucked together with the intake air generated by driving the electric blower 2 is collected by a dust collection pack arranged in a dust collection chamber (not shown). And collect dust.

  Further, a power cord (not shown) for supplying electric power to the electric blower 2 is accommodated in the cleaner body 1, and a tip portion is led out to the outside.

  Furthermore, a main body inlet 3 for sucking air from the outside is opened at the front center of the cleaner main body 1. A hose body 4 is connected to the main body suction port 3 as an elongated substantially cylindrical connecting pipe that is flexible and can be bent. At the tip of the hose body 4, a hand operation unit 5 is provided as an operation unit capable of selecting an operation mode of the electric blower 2.

  The hand operating unit 5 includes a plurality of setting buttons 6 for setting the driving state of the electric blower 2 and the like in the cleaner body 1 to a plurality of predetermined positions such as off, weak, medium and strong, that is, a driving mode. And a gripping portion 7 that is gripped by an operator when cleaning is projected from the proximal end side. In addition, an extensible and elongated cylindrical extension pipe 8 is detachably connected to the distal end of the hand operation section 5 in a detachable manner. Furthermore, a floor brush 9 as a suction port for sucking dust on the carpet is detachably connected to the tip of the extension pipe 8, for example, placed on a carpet on the floor of the room. Yes.

  Next, the internal configuration of the above embodiment will be described.

  As shown in FIG. 1, a control means 11 is provided in the cleaner body 1. The control means 11 is connected to a power source unit 12 that rectifies and smoothes the power supplied from the commercial AC power source e, and the power is supplied from the power source unit 12. The control means 11 is electrically connected to the setting button 6 of the hand operation unit 5 and the gate of the triac Tr that is a bidirectional control element.

  Further, the control means 11 detects on / off of the setting button 6 of the hand operating unit 5 selected and set by the operator based on a voltage value as a setting value output from the setting button 6, and this detected setting is detected. By supplying a predetermined pulse voltage to the gate of the TRIAC Tr in response to the ON / OFF of the button 6 to turn the TRIAC Tr on and off, the phase conduction angle is controlled, and the input voltage from the power supply unit 12 to the electric blower 2 is controlled. The drive state of the electric blower 2 is controlled by a plurality of drive modes such as “strong”, “medium”, and “weak”.

  Next, the control of the above embodiment will be described with reference to the graphs shown in FIGS. 3 and 4 and the flowchart shown in FIG.

  In the state where the cleaner body 1 is driven, first, the control means 11 reads the voltage value output by the operation of the setting button 6 of the hand operation unit 5 (step 1).

  Next, the control means 11 determines whether the voltage value has been detected a predetermined number of times, for example, whether 10 voltage values have been read (step 2).

  In step 2, if the control means 11 determines that ten voltage values have not been read, the process returns to step 1.

On the other hand, if the control means 11 determines that 10 voltage values have been read in step 2, the 10 voltage values are grouped into one group, and the control means 11 determines the maximum voltage value V in this group. The difference between _A and the minimum value V _B is extracted, and ΔV is calculated (step 3).

At this time, for example, as shown in FIG. 3, in a state where almost no noise has entered the voltage value, V _A ≈V _B and ΔV becomes relatively small.

On the other hand, for example, as shown in FIG. 4, in the state where noise has entered the voltage value, the difference between the maximum value V _A and the minimum value V _B becomes large, and ΔV becomes relatively large. This noise is generated, for example, from broadcasting radio waves or communication radio waves.

Therefore, the control means 11 determines whether or not ΔV calculated in step 3 exceeds a predetermined threshold value V _TH (for example, 3 to 4 V) set in advance, that is, whether ΔV> V _TH (step 4). In step 4, when the control means 11 determines that ΔV> V _TH is not satisfied, that is, ΔV ≦ V _TH , the control means 11 determines that almost no noise has entered the voltage value. The control means 11 calculates the average value of the eight voltage values excluding the maximum value V _A and the minimum value V _B of the individual voltage values as a detection set value, that is, a detection voltage value. Is determined by the control means 11, and the control means 11 switches the drive of the electric blower 2 to a drive mode corresponding to this voltage value (step 5).

  In this step 5, when the detected voltage value is determined by the control means 11, various other methods are possible, for example, averaging all the read voltage values.

On the other hand, if the control means 11 determines in step 4 that ΔV> V _TH , the control means 11 determines that noise has entered the read voltage value and is not a normal voltage value, so The voltage value output from the unit 5 is ignored, the voltage value is not judged, the first value of the read 10 voltage values is discarded, the process returns to Step 1 (Step 6), and the 10th voltage is newly added. Read the voltage value .

  Next, the cleaning operation of the above embodiment will be described.

  First, the worker sequentially connects the hose body 4, the extension pipe 8, and the floor brush 9 to the main body suction port 3 of the cleaner body 1.

  Further, when the operator pulls out a power cord (not shown) from the vacuum cleaner body 1 and connects it to an outlet (not shown), then grips the gripping portion 7 and operates a predetermined setting button 6. Then, the control means 11 drives the electric blower 2 in a predetermined drive mode.

  Then, the floor brush 9 grounded on the floor surface is caused to travel back and forth, and dust on the floor surface is sucked from the floor brush 9 together with air.

  The sucked air passes through the extension pipe 8, the hose body 4 and the main body suction port 3 together with dust, and dust is collected when passing through the dust collection pack of the dust collecting chamber in the cleaner body 1. The air in which the dust is collected is sucked into the electric blower 2 and exhausted to the outside of the cleaner body 1 as exhaust air.

As described above, in the above-described embodiment, the difference ΔV between the maximum value V _A and the minimum value V _B extracted by the control means 11 by sampling the voltage value output from the hand operation unit 5 a predetermined number of times is predetermined. When it is larger than the threshold value V _TH , the control unit 11 ignores the voltage value output from the hand operating unit 5.

  For this reason, compared with the case where the average value of the voltage value read by the control means 11 is made into a detected voltage value etc., for example, the operation part 5 by the electric wave from motors, such as an electric blower 2, a mobile phone, or a radio tower etc. Even when noise enters the voltage value output from the control unit 11, it is possible to prevent the control means 11 from misidentifying this voltage value. For example, the electric blower 2 is erroneously in the off mode against the operator's operation. It can be surely prevented that it gets stuck.

  Moreover, since it can respond only by changing the control method by the control means 11, the part added especially with respect to the conventional vacuum cleaner is unnecessary, and it can prevent that a structure becomes complicated.

  In addition, in the said one Embodiment, as a setting value which sets the drive state of the electric blower 2, various things other than a voltage value can be used.

  Moreover, in this Embodiment, although the predetermined threshold value was set to 3-4V, it is not necessarily limited to this numerical value.

  Furthermore, the vacuum cleaner is not limited to the canister type, and can be applied to any configuration such as an upright type, a self-propelled type, or a handy type.

It is a block diagram which shows the vacuum cleaner of one embodiment of this invention. It is a perspective view which shows a vacuum cleaner same as the above. It is a graph which shows the relationship between the normal setting value and time of the hand operation part of a vacuum cleaner same as the above. It is a graph which shows the relationship between the setting value which the noise of the same operation part same as the above invaded, and time. It is a flowchart which shows control of a vacuum cleaner same as the above.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner body 2 Electric blower 5 Hand operation part as operation part
11 Control means

Claims (1)

A vacuum cleaner body containing an electric blower,
An operation unit for outputting a set value for setting a driving state of the electric blower by operation;
Control means for driving the electric blower based on the set value output from the operation unit,
The control means includes
A first control for sampling a set value output from the operation unit by a predetermined number of times by operating the operation unit ;
A second control for extracting a maximum value and a minimum value from these sampled values and obtaining a difference between them;
A third control for comparing the difference between the maximum value and the minimum value obtained by the second control with a predetermined threshold;
The third when the difference between the maximum value and the minimum value is greater than the predetermined threshold value in the control is first outputted from the operation unit discarded sampled value set value of the predetermined number of times of sampling values A vacuum cleaner characterized by performing a fourth control to newly sample and return to the second control .

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