JP2006192044A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a dust collecting efficiency when intensively cleaning a specific range of a cleaning object surface from which dust is hardly removable. <P>SOLUTION: This vacuum cleaner is provided with a reciprocation detecting means 11 detecting a reciprocating speed of a suction implement 6 and an electric blower 2 generating a suction force; and improves the suction force of the electric blower 2, when the speed of the reciprocation detecting means 11 becomes higher than a preset speed. This constitution can provide the vacuum cleaner having high usability and improving the dust collecting efficiency when intensively cleaning a place from which the dust is hardl removable. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner, and more particularly to control that improves dust collection efficiency of dust that has entered a carpet.

Conventionally, in this type of vacuum cleaner, as shown in FIG. 5, a control circuit 104 having an electric blower 102 and a signal processing unit 103 is built in the vacuum cleaner main body 101, and a hand operating unit 105, a vacuum cleaner main body 101, and a hand A hose 106 connected to the operation unit 105, an electric motor 108 built in the floor suction tool 107, a rotating brush 109 that scoops up dust rotated by the electric motor, and an extension connecting the floor suction tool 107 and the hand operation unit 105. It is comprised from the pipe | tube 110, The suction force control of the electric blower 102 and the presence or absence of rotation of an electric motor are controlled by the hand operation part 103. FIG. Further, in order to suppress the number of core wires of the hose 106, one side of the commercial power source is connected to the motor 108, and the power source and the hand operation signal are transmitted with reference to the wire. In addition, there is one that detects a current of an electric motor and stops the electric motor when an overcurrent occurs (for example, see Patent Document 1).
JP 2002-248070 A

  However, in the conventional configuration, since the suction force is constant, the suction force is reduced on wooden floors where dust is easily removed, reducing power consumption, and for carpets that are difficult to remove dust, the suction force is increased to improve the take-off performance. The operation was selected by the user using the local operation unit. Also, the electric motor does not blow off dust on a light wooden floor, and the floor has many specifications such as setting the rotation speed at which dust can be scraped out and setting the height of the suction tool considering operability. Nevertheless, since the rotation speed and the height of the suction tool are constant, it is difficult to make compatible settings. In addition, when pet hair or the like gets into the carpet, there is a problem that it is difficult to collect dust with the current setting.

  The present invention solves the above-mentioned conventional problems, and provides a vacuum cleaner with improved cleaning performance that improves dust collection efficiency when cleaning is performed in a concentrated area where dust is difficult to remove.

  In order to solve the above-described conventional problems, the vacuum cleaner of the present invention includes a reciprocating detection means for detecting the reciprocating speed of the suction tool and an electric blower for generating a suction force, and the speed of the reciprocating detection means is preset. When the speed is higher than the current speed, the suction force of the electric blower is improved.

  As a result, when intensively cleaning a place such as a carpet where dust is difficult to remove, the suction force increases when the suction tool is operated at the same reciprocating speed at the same place multiple times.

  The vacuum cleaner of the present invention can collect dust that is difficult to remove because the suction force increases when intensively cleaning a place where dust is difficult to remove. Further, since the suction force is low at the normal reciprocating speed, power consumption can be suppressed and noise can also be suppressed.

  A first invention includes a reciprocation detecting means for detecting a reciprocating speed of the suction tool and an electric blower for generating a suction force. When the speed of the reciprocating detection means becomes higher than a preset speed, the electric motor By improving the suction force of the blower, dust that is difficult to remove can be collected because the suction force increases when the place where dust is difficult to remove is intensively cleaned. Further, since the suction force is low at the normal reciprocating speed, power consumption can be suppressed and noise can also be suppressed.

  The second invention comprises a reciprocating detection means for detecting the reciprocating speed of the suction tool, a rotating brush for scraping dust to the suction tool, and an electric motor for rotating the rotating brush, and the speed of the reciprocating detecting means is preset. When the speed is higher than the speed at which the motor is rotating, the rotational speed of the motor is increased so that when the dust is difficult to remove, the motor speed increases and the dust of the rotating brush is lifted up. Can collect dust that is difficult to remove. Further, at the normal reciprocating speed, the number of rotations can reduce power consumption, and dust can be prevented from being blown off.

  The third invention comprises a reciprocating detection means for detecting the reciprocating speed of the suction tool, a rotating brush for scraping dust to the suction tool, and a brush moving means capable of changing the height of the rotating brush from the floor surface, When the speed of the reciprocating detection means is higher than a preset speed, the rotary brush sucks in when intensively cleaning the place where dust is difficult to remove by bringing the rotary brush close to the floor surface. It is possible to collect dust that is difficult to remove because it gets closer to the tool and the lifting force increases. Further, since the rotating brush is housed in the suction tool at the normal reciprocating speed, it is possible to suppress damage to the floor.

  4th invention is equipped with the reciprocating detection means which detects the reciprocating speed of a suction tool, and the nozzle movement means which can vary the height from the floor surface of a suction tool, The speed of the said reciprocation detecting means is preset. When the speed becomes faster, the suction tool gets closer to the floor when intensive cleaning is performed in a place where it is difficult to remove dust. Dust that is difficult to remove can be collected. Moreover, since the suction tool is separated from the floor surface at the normal reciprocating speed, the operability can be reduced.

  The fifth invention is particularly a reciprocation detecting means according to any one of the first to fourth inventions, and the current load such as a wooden floor and a tatami mat is judged by judging the acceleration change of the acceleration sensor provided in the suction tool. The reciprocating speed can be detected even on a floor surface with small changes, and all floor surfaces can be handled reliably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a circuit block diagram of the electric vacuum cleaner according to the first embodiment of the present invention, and FIG. 2 is an external view of the electric vacuum cleaner.

  In FIG. 2, reference numeral 1 denotes a main body of an electric vacuum cleaner, which has a built-in electric blower 2 for a dust collection chamber (not shown) that generates a suction force and collects dust. Reference numeral 3 denotes a hose, which has a hand operating section 4 for switching the operation mode of the electric vacuum cleaner by changing the strength of the suction force of the electric blower 2. Reference numeral 6 denotes a suction tool for sucking dust on the surface to be cleaned in contact with the floor surface, and has a built-in rotary brush 7 for scraping dust on the surface to be cleaned and an electric motor 8 for driving the rotary brush 7. The rotating brush 7 is driven by the electric motor 8 via a belt (not shown) or the like, or the electric motor 8 is built in the rotating brush 7 and the rotating brush is connected via a gear (not shown) or the like. 7 or the like. Reference numeral 5 denotes an extension pipe that communicates the suction tool 6 and the hose 3. By operating the hand operating section 4 and driving the electric blower 2 and the electric motor 8, dust on the surface to be cleaned is wiped up from the suction tool 6, and the dust is removed from the extension pipe 5, the hose 3, and the electric vacuum cleaner main body 1. The dust is collected in a dust collection chamber (not shown) built in the main body 1 of the vacuum cleaner, and the suction air is discharged from the vacuum cleaner 1.

  In FIG. 1, the vacuum cleaner of the present embodiment is divided into four blocks: a vacuum cleaner body 1, a hose 3 provided with a hand operation unit 4, an extension pipe 5, and a suction tool 6. 7 is a first bidirectional thyristor for controlling the phase of an electric motor 8 that rotationally drives 7. Reference numeral 11 denotes a reciprocal detection means, and in this embodiment, the current detection means 12 detects the load current I by a voltage loss corresponding to the resistance r of the hose 3 existing on the power supply path to the electric motor 8. The load current I can be detected by a voltage loss caused by the resistance r due to the load current flowing in the motor 8 and the applied voltage changing. Reference numeral 13 denotes a second bidirectional thyristor for controlling the phase of the electric blower 2 that generates the suction force. Reference numeral 14 denotes a microcomputer which is a control means for controlling the electric power supplied to the electric blower 2 and the electric motor 8, and takes in the switch operation information of the hand operating section 4 and the load current information of the electric motor 8 output from the current detection means 12, Based on the information, an ignition pulse for phase control is output to the first bidirectional thyristor 10 and the second bidirectional thyristor 13 to perform control. Reference numeral 15 denotes a DC power supply device serving as a power supply for the microcomputer, which is constituted by a negative power supply with reference to the common line. Reference numeral 16 denotes a commercial power source for supplying power to the vacuum cleaner.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 1, the hand operating unit 4 includes a plurality of switches SW1 to SW3 and resistors r1 to r4, and the hand operating unit 4 is controlled by a change in the divided voltage with the resistor R built in the circuit on the main body 1 side. Recognizing how the operation is performed, the microcomputer 14 signal is output to the first bidirectional thyristor 10 and the second bidirectional thyristor 13, and the electric blower 2 and the electric motor 8 are operated according to the hand operation. Operates with suction force. When the electric motor 8 operates and a load current flows, the current I flows through the minute resistance r on the wiring of the hose 3, so that a voltage loss of r × I occurs at the resistance r, and this voltage loss is transmitted to the microcomputer 14. It is input in a waveform as shown in FIG. The peak value of this waveform changes according to the change of the load current I, and increases as the current I increases, and decreases as the current I decreases. Therefore, the microcomputer 14 can determine the load current of the motor 8.

  Further, as apparent from the waveform of FIG. 3, the peak value of the voltage is after a certain time since the first bidirectional thyristor 10 is turned on, and the change at that time becomes large. Needless to say, the accuracy is improved by taking in. The accuracy can also be improved by smoothing, amplifying and capturing this waveform. Here, since the rotating brush 7 is rotating in one direction, when the suction tool 6 is pushed out, the suction tool 6 is pressed against the surface to be cleaned. Since the suction tool 6 is in a state of being separated, the load current I of the electric motor 8 is larger in the pushing state than in the pulling state. That is, since the load current I due to the reciprocating operation of the user's suction tool 6 fluctuates, the voltage at a certain timing or the smoothed voltage changes like a wave as shown in FIG. Since the change width and absolute value of this waveform vary depending on the load current I, it varies depending on the load on the surface to be cleaned such as a wooden floor or a carpet. The wavelength of this waveform varies depending on the reciprocating speed.

  Therefore, the microcomputer 14 can detect the reciprocating speed of the surface to be cleaned and the suction tool 6 by this waveform. When the user intensively cleans the limited cleaning range where dust is difficult to remove, the reciprocation speed increases. When the microcomputer 14 recognizes this reciprocation speed and exceeds the predetermined speed, The phase value of the first bidirectional thyristor 10 is changed to improve the rotational speed of the electric motor 8, and the lifting force is further improved, or the phase value of the second bidirectional thyristor 13 is changed to improve the suction force. In addition, the notification unit 16 operates to notify the user. Further, since the floor surface can also be detected, the power control of the electric blower 2 and the motor 8 when the reciprocating speed is fast depending on the type of the floor surface can achieve both energy saving and dust collection performance if performed in multiple stages. . Since the reciprocating speed varies depending on the user, this waveform is constantly monitored using a storage means (not shown) to store the reciprocating speed having a high use frequency, and it is recognized that the speed determined in advance by the microcomputer 14 is high. It is also possible to adjust to the user's feeling by correcting the speed. Needless to say, if power control of the electric blower 2 and the electric motor 8 is performed in multiple stages according to the reciprocating speed, it is possible to achieve both energy saving and dust collection performance.

  In the present embodiment, the reciprocating detection means 11 is realized by detecting the change in the load current I of the electric motor 8. However, the acceleration sensor 17 and the second DC power source serving as the power source for the acceleration sensor 17 are provided in the suction tool 6. By having the device 18, the reciprocating speed of the suction tool 6 can be detected from the change of the piezoresistive element in the acceleration sensor 17 generated by the reciprocating operation. Further, by providing the extension tube 5 with the angle sensor 19 and the third DC power supply device 20 that serves as a power source for the angle sensor 19, the angle from the gravity direction of the extension tube 5 generated by the reciprocating operation can be determined. The reciprocating speed of the suction tool 6 can also be detected by detecting the angle by reading it with an optical sensor with reference to the lower limit. Further, the current detecting means 12 can be realized more easily if it is detected by a dedicated component such as a current transformer.

  As described above, in the present embodiment, the reciprocating speed is detected by detecting the voltage loss generated in the conductor resistance of the hose 3 due to the change in the load current I due to the reciprocating operation of the suction tool 6. By improving the suction force of the electric blower 2 and improving the lifting force of the electric motor 8, optimum control when intensively cleaning a limited cleaning range can be realized, and dust collection performance is improved. A vacuum cleaner can be provided.

(Embodiment 2)
FIG. 5 shows an internal configuration diagram of the suction tool according to the second embodiment of the present invention.
Reference numeral 21 denotes a roller disposed on the bottom surface of the suction tool 6. Reference numeral 22 denotes a moving body connected to a roller 21 disposed at the corner of the suction tool 6, and this moving body 22 is connected to a stepping motor 23 which is a nozzle moving means via a gear 24. The moving body 22 is attached so that it can move in the vertical direction of the suction tool 6 by forward and reverse rotation of the stepping motor 23.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In the circuit configuration of this embodiment, the reciprocating speed of the suction tool 6 is detected, and when the reciprocating speed is high, the microcomputer 14 outputs a signal to the stepping motor 23 that is a nozzle moving means so as to rotate in the forward rotation direction. When the motor 23 rotates forward, the moving body 22 operates so that the suction tool 6 approaches the surface to be cleaned, so that the negative pressure of the suction tool 6 increases. When the reciprocating speed becomes slow, the suction tool 6 moves away from the surface to be cleaned by rotating in reverse, so that the negative pressure decreases. Here, when the reciprocating speed increases, the suction tool 6 approaches the floor surface, so that the load on the floor surface increases and the rotational speed of the rotary brush 7 decreases, but the load current I is detected, so the object to be cleaned is cleaned. It goes without saying that the moving distance is varied so as not to impair the scraping force on the surface. If the moving body 22 is connected to the rotating brush 7 with this configuration, only the rotating brush 7 can be brought close to the surface to be cleaned as the brush moving means 25.

  As described above, in the present embodiment, the negative pressure on the floor surface is increased by moving the suction tool 6 and the rotating brush 7 closer to the surface to be cleaned by the reciprocating speed by the reciprocating operation of the suction tool 6. Provides a highly usable vacuum cleaner that improves dust collection performance by providing optimal control when intensively cleaning a limited cleaning range by improving the lifting force of the rotating brush 7 can do.

  As described above, the vacuum cleaner according to the present invention can automatically improve the suction force by applying the fact that the reciprocating speed of the suction tool increases when cleaning a place where dust is difficult to remove, Since it can respond to the various conditions of various floors, it can be used widely.

The circuit block diagram of the vacuum cleaner in Embodiment 1 of this invention External view of the electric vacuum cleaner in Embodiment 1 Explanatory drawing of the load current change of the vacuum cleaner in Embodiment 1 Explanatory drawing at the time of suction tool reciprocation of the electric vacuum cleaner in Embodiment 1 The internal block diagram of the suction tool in Embodiment 2 of this invention External view of conventional vacuum cleaner

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Electric blower 6 Suction tool 7 Rotating brush 8 Electric motor 11 Reciprocation detection means 12 Current detection means 16 Notification means 17 Acceleration sensor 19 Angle sensor 23 Stepping motor (nozzle movement means)
25 Brush moving means

Claims (5)

When the reciprocating speed detected by the reciprocating detection means becomes faster than a preset speed, comprising a reciprocating detecting means for detecting the reciprocating speed of the suction tool, an electric blower for generating a suction force, and a control means. Is a vacuum cleaner characterized in that the control means increases the suction force of the electric blower. A reciprocating detecting means for detecting a reciprocating speed of the suction tool, a rotating brush for scraping dust to the suction tool, an electric motor for rotating the rotating brush, and a control means, and the reciprocating speed detected by the reciprocating detecting means is The vacuum cleaner characterized in that when the speed becomes higher than a preset speed, the control means increases the rotational speed of the electric motor. Reciprocating detection means for detecting the reciprocating speed of the suction tool, a rotating brush for scraping dust to the suction tool, a brush moving means capable of varying the height of the rotating brush from the floor, and a control means, An electric vacuum cleaner characterized in that when the reciprocating speed detected by the reciprocating detecting means is faster than a preset speed, the control means brings the rotating brush closer to the floor surface. A reciprocating detection means for detecting the reciprocating speed of the suction tool, a nozzle moving means capable of changing the height of the suction tool from the floor, and a control means, wherein the reciprocating speed detected by the reciprocating detection means is set in advance. The vacuum cleaner characterized in that the control means brings the suction tool closer to the floor surface when the speed becomes higher than a certain speed. The reciprocating detection means detects the acceleration of the suction tool instead of the reciprocating speed of the suction tool, and when the detected acceleration becomes faster than the preset acceleration, the control means increases the suction force of the electric blower, Alternatively, the number of rotations of the electric motor is increased, the rotating brush is brought closer to the floor surface, or the suction tool is brought closer to the floor surface.

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