JP2001245834A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a floor suction tool which can determine whether it attaches to the floor or not has a complicated structure and increases the cost. SOLUTION: The suction tool 5 comprises a built-in brush 9, a brush driving motor 10 to drive the brush 9 and a means 14 to determine whether the floor suction tool 5 attaches to the floor or not. The attachment determination means 14 comprises a line voltage detection means to detect the voltage on the power supply line for the electric power supplied to the brush driving motor 10, namely a power supply line resistance component 12 and a comparison resistance component 13. The attachment determination means 14 determines by the resistance division structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner used in ordinary households.

[0002]

2. Description of the Related Art In recent years, vacuum cleaners have been improved in function and improved in usability and power consumption have been reduced, and the number of vacuum cleaners that supply sufficient power for cleaning and suppress unnecessary power consumption has been increasing. .

[0003] As one of them, a vacuum cleaner having a motor-driven brush having a sufficient dust-collecting ability for a floor surface such as a carpet or the like to control the input by judging the floor surface condition is considered. Conventionally, this type of vacuum cleaner generally has a configuration as shown in FIGS. The configuration will be described below with reference to the drawings.

[0006] As shown in FIGS. 6 and 7, reference numeral 101 denotes a cleaner main body, 102 denotes a hose, 103 denotes a hand operation unit, 104 denotes an extension tube, and 105 denotes a floor suction tool. Vacuum cleaner body 101
A fan motor 106 for performing suction and a dust collection chamber 107 for storing the sucked dust are provided inside. Fan motor control means 108 controls the power of the fan motor 106. In the floor suction tool 105, there are a brush 109 for scraping up dust and a brush drive motor 110 for driving the brush 109. Reference numeral 111 denotes a brush motor control unit that drives the brush drive motor 110, and reference numeral 112 denotes a current detection unit that detects a current flowing through the brush drive motor 110. Reference numeral 113 denotes current change detection means for detecting a change in the current detection means 112, and reference numeral 114 denotes separation / attachment determination means for determining whether or not the floor suction tool 105 is attached to or detached from the floor surface from the output of the current change detection means 113. .

The operation of the above configuration is as follows.
When the hose 102, the extension tube 104, and the suction port 105 are connected to the cleaner main body 101 as shown in FIG. 7, and the commercial power source (not shown) is connected to operate the hand-held operation unit 103, the fan as shown in FIG. When a signal is output from the motor control means 108 and the fan motor 106 starts rotating, the brush motor control means 111 sends a signal to the brush drive motor 110 and the brush 109 also starts rotating, and the vacuum cleaner starts operating. Brush 10 in floor suction tool 105
9 moves by being operated on the floor surface, and at this time, the load applied to the brush 109 changes every moment. When the load changes, the current flowing through the brush drive motor 110 also changes. This change is monitored by the current change detecting means 113 through the output of the current detecting means 112, and when there is no change for a predetermined time, the detachment / determination means 114 performs detachment on the floor. This current detecting means 112
In this case, a current sensor is used, and the power supply to the fan motor 106 is reduced when the user is away from the floor, thereby saving power consumption. In some cases, a sensor for sensing the physical contact with the floor is provided to perform the same control.

[0006]

However, in such a conventional vacuum cleaner, a dedicated sensor is used to detect a change in the suction of the floor suction tool in order to determine whether or not the suction tool is detached from the floor surface. , Expensive and complicated configurations.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a floor suction device, a dust scraper built in the floor suction device for scraping dust on the floor, and a dust scraper. A drive motor for rotating the body, and a floor separation / adjustment determining unit for determining whether the floor suction tool is attached to or detached from the floor, and the floor supply / separation determination unit is configured to supply electric power supplied to the drive motor. It comprises voltage detecting means for detecting the voltage on the line, and determines whether or not the floor suction tool separates from the floor surface based on the detection result of the voltage detection means. It is possible to realize a vacuum cleaner that can determine whether to wear.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION
A floor suction device, a dust scraper built into the floor suction device for scraping dust on the floor, a drive motor for rotating the dust scraper, and detachment of the floor suction device from the floor. A floor surface separation / adjustment judging unit for judging the floor surface, wherein the floor surface separation / attachment judgment unit is constituted by voltage detection means for detecting a voltage on a power supply line supplied to the drive motor, and Since the determination of the wearing is made based on the detection result of the voltage detecting means, it is possible to realize a vacuum cleaner which can determine whether the floor suction tool is detached from the floor with a simple configuration.

According to a second aspect of the present invention, there is provided a floor suction device, a dust scraper incorporated in the floor suction device for scraping dust on the floor, and a drive motor for rotating the dust scraper. And a floor separation / attachment determining unit that determines whether the floor suction tool is attached to or detached from the floor surface, wherein the floor surface separation / attachment determination unit is configured by a temperature detection unit that detects a temperature of the drive motor, Since the detachment of the floor suction tool is determined based on the detection result of the temperature detecting means, it is possible to realize a vacuum cleaner capable of determining the detachment of the floor suction tool from the floor surface with a simple configuration.

According to a third aspect of the present invention, there is provided a floor suction device, a dust scraper incorporated in the floor suction device for scraping dust on the floor, and a drive motor for rotating the dust scraper. And a floor-separation determining unit for determining whether the floor suction tool is separated from the floor surface. The counter-electromotive force detecting unit detects a back electromotive force generated by rotation of the drive motor. An electric vacuum cleaner comprising electric power detection means for determining whether or not the floor suction tool is attached or detached based on the detection result of the back electromotive force detection means. Can be realized.

According to a fourth aspect of the present invention, the back electromotive force is detected by a voltage of a driving motor, and a vacuum cleaner capable of judging whether or not the floor suction tool is detached from the floor surface with a simple configuration. Can be realized.

According to a fifth aspect of the present invention, a back electromotive force is detected by a voltage of a power supply line to a drive motor. A vacuum cleaner that can be determined can be realized.

According to a sixth aspect of the present invention, there is provided a fan motor for sucking dust into a cleaner body, a fan motor control means for controlling power supplied to the fan motor, and a floor suction tool. A detachment determining means for determining the detachment from the floor surface, and controlling the power supplied to the fan motor according to the determination result of the floor surface detachment determining means,
With a simple configuration, it is possible to save power consumption and reduce the noise of the cleaner body when leaving the bed.

According to a seventh aspect of the present invention, there is provided a fan motor for sucking dust into a cleaner body, fan motor control means for controlling power supplied to the fan motor, and a floor suction tool. Determining whether the floor suction surface is attached to or detached from the floor surface, and controlling the power supplied to the drive motor in accordance with the determination result of the separation / attachment determination unit. Savings can be achieved.

The invention according to claim 8 of the present invention comprises an operation section for outputting an input control signal of the fan motor and / or the drive motor from the main body, and the signal sent from the operation section and the separation / attachment determination means. Setting the control content of the fan motor and / or the drive motor according to the output of
It is possible to realize a vacuum cleaner that can save power consumption more accurately according to the user's feeling.

According to a ninth aspect of the present invention, one of a signal line for transmitting a signal from the operation unit to the main body and a power supply line for the drive motor is configured as a shared line, and the other signal line is connected to the other signal line. A change in the input / output voltage is judged to determine whether or not the vacuum cleaner is attached or detached, so that a vacuum cleaner having improved operability while reducing the number of wires can be realized.

According to the tenth aspect of the present invention, since a display section for outputting a signal from the main body in advance of the main body is provided, a vacuum cleaner having excellent usability can be realized.

According to an eleventh aspect of the present invention, a display section for outputting a signal from the main body first from the main body, and one of a power supply line and a display line of a drive motor is constituted by a common line. In addition, it is possible to judge the change of voltage by inputting the voltage change input from the other display line, thereby realizing a vacuum cleaner excellent in both operability and usability.

According to the twelfth aspect of the present invention, since the display line and the signal line are shared, it is possible to realize an inexpensive vacuum cleaner having excellent usability.

According to the thirteenth aspect of the present invention, since the output value of the separation / separation judging means is input in synchronization with the power supply frequency, it is possible to realize a vacuum cleaner which can surely and easily judge the separation. .

In the invention according to claim 14 of the present invention, the judgment of departure / attachment and other signals are switched in time series, so that signal transmission and line saving can be reliably realized, and inexpensive and power consumption can be saved. Can be realized.

The invention according to the fifteenth aspect of the present invention is provided with an informing means for informing a user when the floor suction tool is determined to be in the off-bed state from the output of the on-off determining means. Information can be reliably transmitted to the user, and a vacuum cleaner with good usability can be realized.

According to a sixteenth aspect of the present invention, when it is determined from the output of the separation / admission judging means that the floor suction tool is in the departure state, power is supplied to the drive motor every predetermined time. By determining whether or not the electric power is supplied to the drive motor except at this timing, it is possible to realize a vacuum cleaner that can reliably perform the determination when leaving the bed and can save power consumption.

According to the seventeenth aspect of the present invention, since the drive motor is constituted by an inverter motor, the drive motor can be controlled with high accuracy, and an easy-to-use vacuum cleaner can be realized.

In the invention according to claim 18 of the present invention, the separation / attachment determination means is constituted by the rotation speed detection means of the inverter motor for the drive motor. Since it is possible to determine the leaving of bed by detecting the number of revolutions, it is possible to realize a vacuum cleaner that saves power consumption with a simple configuration.

In the invention according to claim 19 of the present invention, the separation / attachment determination means is constituted by the current detection means of the inverter motor for the drive motor. Since it is possible to determine the leaving of bed by detecting the value, it is possible to realize a vacuum cleaner that saves power consumption with a simple configuration.

According to the twentieth aspect of the present invention, since the fan motor is constituted by an inverter motor, the input control of the fan motor can be performed with very high accuracy, and an easy-to-use vacuum cleaner can be realized.

According to the twenty-first aspect of the present invention, since the power supply voltage is detected and the judgment result of the separation / separation judgment means is corrected,
It is possible to realize a vacuum cleaner that can accurately judge leaving the bed and saves power consumption.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 shows the overall configuration of the electric vacuum cleaner according to the present embodiment. 1 is a vacuum cleaner main body, 2 is a hose, 3 is a hand operating part, 4 is an extension tube having one end connected to the hose 2, and 5 is a floor suction tool connected to the other end of the extension tube 4. It is. In the main body 1, there are a fan motor 6 and a dust collecting chamber 7 for storing sucked dust. A fan motor control unit 8 controls the electric power of the fan motor 6. In the floor suction tool 5, there are a brush 9 for scraping up dust and a brush drive motor 10 for driving the brush 9. As shown in FIG. 1, 11 is a brush motor control means for driving the brush drive motor 10, 12 is a power supply line resistance component to the brush drive motor 10, and 13 is a voltage drop of the power supply line resistance component 12. Reference numeral 14 denotes a detachment / separation determining unit that determines the amount of power supplied to the brush drive motor 10 from the power supply line resistance component 12 and the comparison resistance component 13. Reference numeral 15 denotes an operation resistance component for performing a driving operation in the hand operation unit 3, reference numeral 16 denotes a hand determination comparison resistor for determining the content of the operation, and reference numeral 17 denotes the operation resistance component 15 and the hand determination comparison resistance. This is a hand operation determination unit that determines the operation content of the hand operation unit from the number 16. Reference numeral 18 denotes a commercial power supply.

The operation of the above configuration is as follows.
When the hose 2, the extension tube 4, and the suction tool 5 are connected to the cleaner body 1 as shown in FIGS. 1 and 2, and then connected to the commercial power supply 18 and the hand operation unit 3 is operated, the resistance value of the operation resistance component 15 is reduced. The resistance division with the hand determination comparison resistor 16 also changes, and if the setting is the operation position, the hand operation determination means 17 starts operation. Then, a signal is output from the fan motor control means 8 and the fan motor 6 starts rotating,
The brush motor control means 11 sends a signal to the brush drive motor 10 and the brush 9 starts rotating. The load applied to the brush 9 changes depending on whether the floor suction tool 5 is operated on the floor surface or separated from the floor surface. Since the load becomes minimum when the brush drive motor 10 is separated from the floor, the current flowing through the brush drive motor 10 is also minimized when the brush drive motor 10 is separated from the floor as shown in FIG. This change is judged by the separation / attachment judging means 14 from the resistance division configuration of the power supply line resistance component 12 and the comparison resistance component 13. At this time, the voltage drop in the power supply line resistance component 12 changes depending on the amount of power supply to the brush drive motor 10. As shown, the power supply amount can be determined based on the change in the voltage. At this time, the accuracy can be improved by determining the determination timing in synchronization with the power supply frequency. If it is determined from this determination that the floor suction tool 5 is separated from the floor surface, a signal is sent to the fan motor control means 8 so as to reduce the amount of power supplied to the fan motor 6, thereby saving power consumption and driving. In addition to reducing noise, a signal is also sent to the brush motor control means 11 to reduce the power supply to the brush drive motor 10 and save power consumption.
Further, it is not necessary to make this determination at all times, and the determination is made at predetermined time intervals that do not affect the usability. After the floor suction tool 5 is once determined to be out of the bed, the brush motor control means 11 only controls the brush The power supply to the drive motor 10 may be performed, and during that time, the power supply may be stopped to further reduce power consumption. In addition, a switch 19 (not shown) is provided which is mechanically opened and closed by detachment to securely stop the brush 9 from a safety aspect when the floor suction device 5 is in a state of leaving the floor. Also in the tool 5, it is possible to determine the detachment from the floor surface in the same manner. In this case, the power supply to the brush drive motor 10 is stopped at the time of leaving the bed, so that the voltage drop in the power supply line resistance component 12 is eliminated, and a clear difference occurs when power is supplied in a normal use state. The attachment / detachment determination means 14 can judge the attachment / detachment of the floor suction tool 5.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG. The external configuration is the same as that of the first embodiment. Also, the same components are denoted by the same reference numerals and description thereof will be omitted. As shown in FIG. 3, a power supply line to the brush drive motor 10 and a signal line of the hand operation unit 3 are shared, and reference numeral 20 denotes a common line resistance component. Reference numeral 21 denotes a common comparison judgment resistor used for both the judgment of the hand operation 3 and the judgment of the amount of power supply to the brush drive motor 10, and 22 denotes the hand operation state and the distance of the floor suction tool 5 from the floor surface. This is state determination means for determining a wearing state. Reference numeral 23 denotes a notifying unit that notifies the user of the leaving state of the floor suction tool 5 by the output of the notifying control unit 24.

The operation according to the above configuration is as follows.
Operations similar to those in the first embodiment are omitted. In the case of this embodiment, if the amount of voltage drop of the common line resistance component 20 fluctuates due to the load of the brush 9 when making the judgment of the hand operation 3, the judgment of the operation resistance component 15 at hand will be erroneous. The power supply to the brush drive motor 10 is temporarily stopped only for a short time when the determination is made. As a result, the voltage drop in the common line resistance component 20 is eliminated, and the common comparison judgment resistance 21
The state determination means 22 determines the content of the hand operation from the hand operation resistance 15. After the determination, the power supply to the brush drive motor 10 through this shared line is restarted. Then, as in the first embodiment, the judgment of the load state of the brush 9 and the detachment / attachment to the floor surface are made in the same manner as in the first embodiment.
2 makes the decision. In this way, the timing can be determined in a time-sharing manner to make the configuration even simpler, and the separation and attachment of the floor suction tool 5 to the floor surface can be determined with an inexpensive configuration, and the fan motor 6 and the brush drive motor 10 can be determined. Unnecessary power supply can be reduced. Further, the user can be notified of this state by the notification means 23, so that usability can be improved.

In addition, by using an inverter motor for the fan motor 6 and the brush drive motor 10, a special sensor can be provided for judging the separation from the floor surface, and control of the inverter motor can be performed without using means different from the intended purpose. By using necessary control means such as a rotation speed detection sensor and a current detection sensor, it is possible to reliably and accurately determine whether or not the vehicle is separated from the floor surface.

In addition, by detecting the power supply voltage and correcting the judgment value according to the detected value, it is possible to more accurately and more reliably determine whether the power supply voltage has changed even if the power supply voltage fluctuates.

[0036]

According to the first to fifth aspects of the present invention, it is possible to realize an electric vacuum cleaner capable of judging whether or not the suction device for the floor is detached from the floor surface with a simple structure at a low cost.

According to the invention as set forth in claim 6 of the present invention, it is possible to realize a vacuum cleaner which saves power consumption for the fan motor when the floor is separated from the floor.

According to the invention described in claim 7 of the present invention, it is possible to realize a vacuum cleaner which saves power consumption for the brush drive motor when the floor is off the floor.

According to the invention of claims 8 to 15 of the present invention, there is provided a vacuum cleaner which can judge whether or not the suction tool for floor is detached from the floor surface with a simple and inexpensive structure, and which has high operability and operability. realizable.

According to the sixteenth aspect of the present invention,
It is possible to realize a vacuum cleaner that can reliably detect the power consumption of the brush drive motor while the power is further removed from the floor surface.

According to the seventeenth to nineteenth aspects of the present invention, it is possible to realize a vacuum cleaner capable of controlling the brush driving motor with high accuracy and determining whether to attach or detach.

According to the invention of claim 20 of the present invention,
By controlling the fan motor with high accuracy, an easy-to-use vacuum cleaner can be realized.

According to the twenty-first aspect of the present invention,
It is possible to realize an electric vacuum cleaner that makes a more accurate judgment of separation.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of a vacuum cleaner showing a first embodiment of the present invention.

FIG. 2 is an external perspective view of a vacuum cleaner showing the first and second embodiments of the present invention.

FIG. 3 is a circuit block diagram of a vacuum cleaner showing a second embodiment of the present invention.

FIG. 4 is a correlation diagram of a load applied to a brush and a brush drive motor current during the operation of the vacuum cleaner.

FIG. 5A is a waveform diagram of a power supply voltage applied to the brush drive motor. FIG. 5B is a waveform diagram of a current flowing through the brush drive motor.

FIG. 6 is a system block diagram of a conventional vacuum cleaner.

FIG. 7 is an external perspective view of a conventional vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Hose 3 Hand operation part 4 Extension pipe 5 Floor suction tool 6 Fan motor 7 Dust collection chamber 8 Fan motor control means 9 Brush 10 Brush drive motor 11 Brush motor control means 12 Power supply line resistance component 13 Comparative resistance Component 14 Detachment / detachment judgment means 15 Operation resistance component 16 Hand judgment comparison resistance 17 Hand operation judgment means 18 Commercial power supply 19 Switch 20 Shared line resistance component 21 Common comparison judgment resistance 22 State judgment means 23 Notification means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akihiro Kitagawa 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 72) Inventor: Shinichi Tsuzuki 1006, Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor: Hidenori Kitamura, 1006, Kadoma, Kazuma, Kadoma, Osaka Pref.

Claims (21)

[Claims] 1. A floor suction device, a dust scraper incorporated in the floor suction device for scraping dust on the floor, a drive motor for rotating the dust scraper, and a floor of the floor suction device An electric cleaning device, comprising: a floor separation / separation determining unit that determines separation / separation from a surface; and wherein the floor separation / separation determining unit is configured by a voltage detection unit configured to detect a voltage on a power supply line supplied to the drive motor. Machine. 2. A floor suction device, a dust scraper built in the floor suction device to scrape dust on the floor, a drive motor for rotating the dust scraper, and a floor of the floor suction device. A vacuum cleaner comprising: a floor surface separation / determination unit configured to determine separation / attachment to / from a surface, wherein the floor surface separation / attachment determination unit includes a temperature detection unit configured to detect a temperature of the drive motor. 3. A floor suction device, a dust scraper built in the floor suction device for scraping dust on the floor, a drive motor for rotating the dust scraper, and a floor of the floor suction device. A vacuum cleaner comprising: a floor surface separation / determination unit for determining separation / attachment to / from a surface, wherein the separation / determination unit includes a back electromotive force detection unit configured to detect a back electromotive force generated by rotation of the drive motor. 4. The vacuum cleaner according to claim 3, wherein the back electromotive force is detected by a voltage of a driving motor. 5. The vacuum cleaner according to claim 3, wherein the back electromotive force is detected by a voltage of a power supply line to the drive motor. 6. A fan motor for sucking dust into the cleaner body, a fan motor control means for controlling power supplied to the fan motor, and judging whether the floor suction tool is detached from the floor. The vacuum cleaner according to any one of claims 1 to 5, further comprising: a detachment / determination unit that controls the power supplied to the fan motor according to a result of the determination by the detachment / determination unit. 7. A fan motor for sucking dust into the cleaner body, a fan motor control means for controlling power supplied to the fan motor, and judging whether or not the floor suction tool is attached to or detached from the floor. The vacuum cleaner according to any one of claims 1 to 6, further comprising: a separation / determination unit configured to control electric power supplied to the drive motor according to a determination result of the separation / determination unit. 8. An operation section for outputting an input control signal of a fan motor and / or a drive motor from a main body first, and the fan motor and / or the drive motor are output in accordance with a signal sent from the operation section and an output of separation / attachment determination means. The vacuum cleaner according to any one of claims 1 to 7, wherein the control content of the drive motor is set. 9. One of a signal line for sending a signal from the operation unit to the main body and a power supply line to the drive motor is constituted by a common line, and a voltage change input from the other signal line is determined. 9. The vacuum cleaner according to claim 8, wherein the determination is made. 10. The vacuum cleaner according to claim 1, further comprising a display unit that outputs a signal from the main body before the main body. 11. A display section for outputting a signal from the main body first from the main body, and one of a power supply line and a display line of a drive motor is constituted by a common line, and is inputted from the other display line. The vacuum cleaner according to claim 10, wherein a determination of a change in voltage is made to determine whether or not the battery has been detached. 12. The vacuum cleaner according to claim 11, wherein the display line and the signal line are shared. 13. The vacuum cleaner according to claim 8, wherein an output value of the attachment / detachment determination means is input in synchronization with a power supply frequency. 14. The vacuum cleaner according to claim 8, wherein the judgment of the departure or arrival and another signal are switched in a time series. 15. The electric device according to claim 1, further comprising a notifying unit for notifying a user when the floor suction tool is determined to be in a departure state from an output of the separation / attachment judgment unit. Vacuum cleaner. 16. When it is determined from the output of the separation / adsorption determining means that the floor suction device is in the floor release state, power is supplied to the drive motor every predetermined time to make a separation / desorption determination. The vacuum cleaner according to any one of claims 1 to 15, wherein power is not supplied to the drive motor. 17. The vacuum cleaner according to claim 1, wherein the drive motor is constituted by an inverter motor. 18. The vacuum cleaner according to claim 17, wherein the separation / attachment judging means is constituted by a rotational speed detecting means of the drive motor inverter motor. 19. The electric vacuum cleaner according to claim 17, wherein the separation / attachment judgment means is constituted by current detection means of an inverter motor for a drive motor. 20. The vacuum cleaner according to claim 1, wherein the fan motor comprises an inverter motor. 21. The electric vacuum cleaner according to claim 1, wherein a power supply voltage is detected and a result of the judgment made by the separation / admission judging means is corrected.