JP2009219671A - Suction tool for vacuum cleaner, and vacuum cleaner using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a suction tool for a vacuum cleaner, which has suction blow and an electric machine as the driving source of an agitator, to be compact and lightweight, to have dust collection power, and to enhance usability. <P>SOLUTION: The suction tool for the vacuum cleaner includes: a section of the suction blow and the electric machine 25, as the driving source of the rotation in the agitator 3; a rotation number detecting section 48 for detecting the rotation number of the agitator 3; and a dust detecting section 43 for detecting the sucked dust. The section by the suction blow is defined as the driving source in a normal case. When the rotation number of the agitator 3 to be detected by the rotation number detecting section 48 comes to be smaller than a prescribed value, the section by the electric machine 25 as the driving source is also started. While the electric motor 25 is being started, a dust state is determined based on the detection result of the dust detecting section 43, so as to control the electric machine 25, on the basis of the determination result. Consequently, control is performed with respect to the rotation of the agitator 3 according to the dust suction state, thereby providing the compact, lightweight, and convenient suction tool for the vacuum cleaner with dust collection power. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a suction tool for a vacuum cleaner having an agitator.

In order to improve the dust collection performance with respect to the floor surface, as one of the problems related to the vacuum cleaner including a suction tool having an agitator, there is a balance for achieving both dust collection force and operability. The suction tool for directly rotating the brush using the suction air as a driving source or rotating the brush via the turbine can be reduced in weight, but if the suction air is reduced due to clogging of dust, the dust collecting force is reduced. Further, in the case where the agitator is driven by the electric motor, the rotational force is secured, but the weight of the electric motor or the like makes it difficult to reduce the weight of the suction tool itself, and the operability is poor. As a solution to this problem, a suction tool has been devised that uses suction air as a driving source and also has a small electric motor so as to ensure the driving force of the agitator. In the invention described in Patent Document 1 below, the turbine and the motor are connected coaxially, and the agitator is rotated using the turbine when the air volume is large, and the motor when the air volume is small. For example, the motor is turned on and off at regular intervals, and the brush is rotated by suction air during the off time. Further, in Patent Document 3, the brush is not rotated by the suction air, but the motor is driven only when the dust collecting force is reduced by detecting the negative pressure.
JP-A-60-58122 Japanese Patent No. 3343979 JP-A-1-303118

  According to these inventions, dust collection performance is ensured by rotating the agitator by suction air and rotating the agitator by an electric motor. However, control is performed according to the dust suction state when dust is actually collected. If there is no particular consideration and no special measures are taken when a large amount of dust is sucked in, or if any dust or foreign matter is trapped, increase the number of rotations in response to a decrease in the number of rotations of the agitator. There is a problem that the driving force is increased, the object or the agitator itself may be more damaged, and even when the object is locked, the suction air is increased or the electric motor current is increased to waste useless power consumption.

  In order to solve these problems, the present invention provides a suction tool for a vacuum cleaner that is compact and lightweight and has a dust collecting force and is easy to use by detecting and controlling dust sucked from the suction tool. It is intended.

  In order to solve the above-described conventional problems, the vacuum cleaner suction tool of the present invention is based on an agitator storage chamber in which an agitator equipped with a brush or a blade is rotatably mounted, and suction air as a drive source for the rotation of the agitator. And a means by an electric motor, a rotation speed detection means for detecting the rotation speed of the agitator, and a dust detection means for detecting the sucked dust, and usually the agitator is rotated by using a suction force means as a drive source. At the same time, when the rotational speed of the agitator detected by the rotational speed detection means becomes smaller than a predetermined value, the means by the electric motor as the drive source is also activated, and the suction for the vacuum cleaner that transmits the rotational force to the agitator The dust collection state is determined from the detection result of the dust detection means while the electric motor as the drive source for the rotation of the agitator is activated. And providing a suction tool for a vacuum cleaner that is compact and lightweight, maintains dust collecting power, and is easy to use, based on the determination result, and controlling the electric motor as a drive source for the rotation of the agitator. Will be able to.

  According to the vacuum cleaner of the present invention, since the control of the rotation of the brush or the blade according to the dust suction state is performed, a compact and lightweight vacuum cleaner suction tool that is easy to use is provided. can do.

  A first aspect of the invention is to detect an agitator storage chamber in which an agitator equipped with a brush or a blade is rotatably mounted, a means by suction air as a drive source for the rotation of the agitator, a means by an electric motor, and a rotational speed of the agitator And a dust detector for detecting the sucked dust. Usually, the agitator is rotated by using the suction air as a drive source, and the rotation of the agitator detected by the engine speed detector is performed. When the number becomes smaller than the predetermined value, the means by the electric motor as the driving source is also activated, and the electric motor as the driving source of the agitator rotation is activated in the vacuum cleaner suction tool that transmits the rotational force to the agitator The dust collection state is determined from the detection result of the dust detection means, and the agitator rotation is determined based on the determination result. It is configured to control an electric motor as a driving source of the motor, and by controlling the rotation of the brush or blade according to the suction state of the dust sucked from the suction tool using the dust detection means, it is compact and lightweight. It is possible to provide a vacuum cleaner suction tool that retains dust force and is easy to use.

  The second invention makes it possible to adjust the time for increasing the rotational speed of the agitator and / or the amount of increase in the rotational speed of the agitator when the dust detecting means of the first invention detects a predetermined amount or more of dust. It is a vacuum cleaner suction tool that prioritizes dust collection performance, and by detecting the amount of dust sucked from the suction tool and controlling the number of rotations, more efficient dust suction can be achieved. It is possible to provide a vacuum cleaner suction tool that has dust power and is easy to use.

  According to a third aspect of the present invention, when the dust detection means of the first aspect of the invention detects dust of a predetermined amount or less, the time for lowering the rotational speed of the agitator and / or the lowering amount of the rotational speed of the agitator can be adjusted. It is a vacuum cleaner suction tool that prioritizes the reduction of power consumption. By detecting the amount of dust sucked from the suction tool and controlling the rotation speed, it is possible to suction dust more efficiently, and it is compact and lightweight. It is possible to provide a vacuum cleaner suction tool that has a dust collecting power and is easy to use.

  According to a fourth aspect of the present invention, when it is determined from the detection result of the dust detection means of the first or third aspect that the inside of the suction path is blocked by foreign matter, two drive sources, a means using suction air and a means using electric motor, are provided. This is controlled so that it is separated from the agitator, and even if dust or foreign matter sucked from the suction tool is large and the suction path is blocked, the agitator can be separated from the drive source to make it free. Therefore, it is possible to provide an easy-to-use vacuum cleaner suction tool that can more easily remove foreign matter jammed.

  The fifth invention is an electric vacuum cleaner using the vacuum cleaner suction tool of any one of the first to fourth inventions, and is a compact and lightweight vacuum cleaner that is easy to use while having dust collecting power. The vacuum cleaner provided with the suction tool for can be provided.

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

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS. In addition, this invention is not limited by this embodiment.

  First, each component will be described with reference to FIG.

  Reference numeral 1 denotes a suction tool according to the first embodiment of the present invention, in which an agitator 3 in which brushes 2 are arranged is rotatably disposed in an agitator storage chamber 4. The storage chamber is formed with a cross section having substantially the same diameter as the agitator 3, and a suction port 7 is provided at the bottom. 9 is a Yuka nozzle pipe for connecting to the extension pipe 10, which is in communication with the storage chamber 4, and the dust sucked from the suction port 7 passes through the Yuka nozzle pipe 9, through the extension pipe 10 and the hose 11. It is sucked into the cleaner body 8. Reference numeral 13 denotes an operating means provided near one end of the hose 11.

  The yuka nozzle pipe 9 and the storage chamber 4 are connected to each other so as to be rotatable in the vertical direction, and 12 indicates the center of rotation (the specific configuration is the same as the existing configuration, and the description is omitted).

  An air inflow port 14 for taking in suction air different from the suction port 7 is formed in the lower front portion of the storage chamber 4, and air for rotating the agitator 3 is taken in.

  The opening area of the air inlet 14 is set so that about 30% of the suction air volume of the cleaner body can be sucked on a flat floor surface, and even when the suction port 7 is blocked, it is 50 to 70%. The pressure loss is suppressed to such an extent that the air volume is sucked. Further, two air inlets 14 are formed near the center in front of the storage chamber 4 so that the suction air is applied to the vicinity of the center of the agitator 3 through the air volume control valve 46.

  Reference numeral 16 denotes a front and rear roller, which maintains the distance from the floor so that the tip of the brush 2 of the agitator 3 protrudes 1 mm from the bottom 8.

  Reference numeral 17 denotes a protruding portion formed in front of the rotating brush storage chamber 4, which serves as a reinforcing material that receives an impact when it hits a wall, and has a roller 16 disposed in a freely rotating manner attached thereto.

  An upper air inlet 18 that opens upward is formed on the upper surface of the projecting portion 17, and a front air intake port 19 that opens forward is formed on the front surface of the projecting portion 17. It is arranged in line with the position.

  More specifically, the upper air intake 18 is positioned higher than the air inlet 14 and is formed in a direction substantially orthogonal to the air inlet 14. On the other hand, the front air intake 19 is located at a position facing the air inlet 14 and is opened in a direction substantially orthogonal to the upper air intake 18.

  A flat plate 20 is formed below the upper air intake 18, and the downstream side of the flat plate 20 reaches the air inlet 14 of the rotary brush storage chamber 4 and enters from the upper air intake 18 and the front air intake 19. Air is guided to the air inlet 14.

  A first shaft 5 and a second shaft 6 are provided at both ends of the agitator 3 and are covered with a first protective cylinder 21 and a second protective cylinder 22, respectively. A clutch 23 is used for the bearing component that receives the first shaft 5 of the agitator 3. Since the outer ring of the clutch 23 is fixed to the large gear 24, the large gear 24 and the clutch 23 rotate in the same direction.

  Reference numeral 26 denotes a small gear attached to the electric motor 25, which meshes with the large gear 24, and each gear shaft (the rotation shaft 27 of the large gear 24 and the motor shaft 28 of the small gear 26) is pitched to the attachment plate 29. As a result, the rotational force of the electric motor 25 is amplified and transmitted to the clutch 23.

  The clutch 23 is composed of an electromagnetic clutch or the like, and sets a connection / disconnection state between the outer ring and the shaft 5 in response to a signal from the control means. When in a disconnected state, the shaft 5 idles with respect to the outer ring. At the time of connection, the rotational force is transmitted to the agitator 3 when the electric motor 25 rotates.

  A motor chamber 30 covers the electric motor 25. Reference numeral 31 denotes a bearing body that covers the first protective cylinder 21 of the agitator 3. When a heavy load is applied in the radial direction of the agitator 3 due to an impact or the like, the bearing body 31 receives the first protective cylinder 21 so that the excessive weight is not concentrated on the clutch 23. As well as preventing dust from entering the clutch 23 portion.

  32 is a detachable lid provided at the other end, integrally formed with a resin bearing 33 that rotatably holds the second shaft 6 of the agitator 3, and by opening and closing the lid 32, The agitator 3 can be attached and detached.

  Reference numeral 34 denotes wiring for supplying power to the electric motor 25 via the electric motor control means 42 and sending electric power and signals to the control target such as the clutch 23.

  Reference numeral 40 denotes control means composed of a microcomputer or the like, which receives a signal from the operation means 13 and transmits a signal for driving the electric blower 41, and determines the control by judging the result of the detection means. Reference numeral 42 denotes an electric motor control means for driving the electric motor 25, which can perform not only rotation but also braking control.

  Reference numeral 43 denotes dust detection means provided in the suction path, which is composed of, for example, an infrared LED and a phototransistor, and converts infrared light blocked by the passage of dust into an electrical signal. The dust amount determination means 44 determines the dust amount from the amount of signal from the dust detection means 43 and sends a signal to the control means 40. In addition, when a large foreign matter is sucked and the infrared light of the dust detection means 43 remains blocked, the biting judgment means 45 judges that the suction portion is blocked by the foreign matter, and controls the control means 40. Send the bite information.

  Reference numeral 46 denotes an air volume control valve composed of, for example, an actuator or the like, which is provided while the air that has entered the air inlet 14 from the upper air inlet 18 and the front air inlet 19 is sent to the agitator 3. The air volume can be adjusted and operated from the output of the wind power control means 47. The electric motor cooling port 51 is a cooling port for heat generation of the electric motor 25.

  Reference numeral 48 denotes a rotational speed detection means for detecting the rotational speed of the agitator 3, which is composed of, for example, a Hall IC (not shown) and the like, and sends a signal synchronized with the rotation of the agitator 3 to the control means 40. .

  The operation of the above configuration will be described.

  When the user gives an instruction to start the operation of the vacuum cleaner via the operation means 13, the control means 40 operates the electric blower 41 and a suction force is generated. At this time, when the suction tool 1 is placed on a flat surface to be cleaned such as a wooden floor, air is sucked from the suction port 7, the air inlet 14, and the rear groove 15 by the suction force of the electric blower 41. About 70% of the suction air volume of the cleaner body 8 is sucked from the suction port 7, about 25% is sucked from the air inlet 14, and about 5% is sucked from the groove 15.

  Since the agitator 3 is in a free state with respect to the forward rotation, the air sucked from the air inlet 14 rotates the agitator 3 and the brush 2. Then, it exerts an effect of scraping off the dust on the floor surface, and collects dust on the floor surface in combination with the suction air from the suction port 7.

  At this time, the air entering the air inlet 14 becomes a downwardly flowing airflow because the vertical airflow entering from the upper air inlet 18 and the horizontal airflow entering from the front air inlet 19 collide with each other. Enter storage room 4. Therefore, wind hits the outer diameter side of the agitator 3, and a high torque torque is exhibited.

  On the other hand, when cleaning a fuzzy surface to be cleaned such as a carpet, the amount of air sucked from the suction port 7 is reduced, and air exceeding 50% of the amount of air sucked from the cleaner body 8 is sucked from the front air inlet 14. Will be.

  Therefore, the force for rotating the agitator 3 by the suction air is doubled, and the brush 2 can be rotated even on a floor surface with a large load such as a carpet.

  In addition, the air entering from the air inlet 14 rotates the agitator 3 and lifts the dust on the surface to be cleaned and transports it to the Yuka nozzle pipe 9 side. Will not fall.

  However, the contact resistance against the agitator 3 is increased in a wiping mat made of a soft material in which the surface to be cleaned floats up due to a long carpet or suction force. Disappear.

  When the rotational speed of the agitator 3 becomes smaller than a predetermined value by the rotational speed detection means 48, the control means 40 activates the electric motor 25 via the electric motor control means 42 and transmits the rotational force to the agitator 3. Thus, the agitator 3, that is, the brush 2 is rotated to collect dust.

  If the agitator 3 rotates, the air flow described above is formed, so that the rotational force due to the wind speed and the force to lift up the dust act, and excellent dust removal performance can be ensured even if the driving force of the motor is low. .

  At this time, it is conceivable to change the number of rotations based on the amount of dust determined by the dust amount determination means 44. For example, as shown in the table below, when it is determined that the amount of dust sucked is very small when it is less than a predetermined dust amount A, it is considered that a substantially high rotational speed is not required. Next, when the dust amount is equal to or greater than A and less than the predetermined dust amount B, the motor is controlled to rotate at the original target rotation speed, and when the dust amount is equal to or greater than B, the motor control means is rotated at a higher rotation speed. 42 or the wind power control means 47 is sent to control the rotational speed of the agitator 3. Thus, the vacuum cleaner which improved dust collection efficiency can be provided by controlling according to the amount of dust.

  It is also conceivable to pay attention to the size of the dust detected by the dust detection means 43 and control the rotational speed of the agitator 3 and the input of the electric blower 41. For example, when the ratio of the size of dust larger than a predetermined value is equal to or greater than a predetermined amount, it can be considered that if the number of rotations is increased due to the large amount of dust, the amount of dust flying off by the brush increases. In such a case, it is better to increase the power supplied to the electric blower without increasing the number of rotations to efficiently suck dust. As described above, by controlling the rotational speed of the agitator 3 or the power consumption of the electric blower 42 based on the detection result of the dust detection unit 43 and the determination result of the dust amount determination unit 44, the power consumption and the dust collection efficiency are combined. An easy-to-use vacuum cleaner that can be enhanced can be provided.

  Furthermore, it is possible to perform control when a large foreign object is sucked from the detection state of the dust detection means 43. For example, when a cloth-like object is sucked and the dust detection unit is blocked, the infrared light is completely blocked, so that it can be determined that the situation is different from the normal dust detection situation. The biting judgment means 45 judges that this state is present and sends a signal to the control means 40. When it is determined that the control means 40 is jammed, the control means 40 sends a signal to the wind power control means 47 to operate the air volume adjusting valve 46. Then, the air flow is closed, and the rotation of the agitator 3 by the suction air can be stopped. At the same time, the control means 40 sends a signal to the electric motor control means 42 to apply the brake so that the electric motor 25 immediately stops the agitator 3. As a result, it is possible to prevent damage from being sucked or damaged by further rotating the agitator 3. At this time, it goes without saying that controlling the input of the electric blower 41 to drop the input or to temporarily stop is also a descending enemy. Further, the control means 40 is not only a means of braking by the electric motor 25 but also separates the electric motor 25 and the agitator 3 by the clutch 23, and stops the rotational force from the suction air by the air volume adjusting valve 46 so that the agitator 3 is completely free. You can also put it in This control makes it possible to easily remove the sucked material without damaging it.

  In this way, dust is collected by utilizing the force of the air sucked in, and the rotation is assisted by the driving force of the electric motor 25 as necessary. Therefore, the electric motor 25 to be mounted has a lower rotational force than the conventional one and is longer. Since a small motor that does not require a life can be selected, the suction tool itself can be reduced in size and weight, and its control is performed according to the state of the dust that has been sucked in. It is possible to provide an easy-to-use suction tool while ensuring goodness and dust collection.

  As described above, the vacuum cleaner suction tool according to the present invention is extremely useful because it is compact and lightweight and secures the dust collecting power.

Sectional drawing of the vacuum cleaner suction tool in Embodiment 1 of this invention Same as above, top view of vacuum cleaner suction tool Same sectional view of the vacuum cleaner suction tool System block diagram of vacuum cleaner suction tool Part drawing of vacuum cleaner suction tool The external perspective view around the electric vacuum cleaner in the first embodiment

Explanation of symbols

1 Suction Tool 3 Agitator 4 Rotating Brush Storage Room (Agitator Storage Room)
DESCRIPTION OF SYMBOLS 8 Vacuum cleaner main body 10 Extension pipe 11 Hose 14 Air inlet 16 Roller 18 Upper air inlet 19 Front air inlet 23 Clutch 25 Electric motor 40 Control means 43 Dust detection means 46 Air volume adjustment valve 47 Wind power control means 47

Claims (5)

An agitator storage chamber in which an agitator equipped with a brush or a blade is rotatably attached, means by suction air as a drive source for rotation of the agitator and means by an electric motor, and a rotation speed detection means for detecting the rotation speed of the agitator And a dust detection means for detecting the sucked dust. Usually, the agitator is rotated with the suction air means as a driving source, and the rotation speed of the agitator detected by the rotation speed detection means is smaller than a predetermined value. In this case, in the vacuum cleaner suction tool for starting the means by the electric motor as the driving source and transmitting the rotational force to the agitator, the dust detection is performed while the electric motor as the driving source for the rotation of the agitator is activated. The dust collection state is judged from the detection result of the means, and based on the judgment result, it is used as a drive source for the rotation of the agitator. Suction tool for configuration for controlling the electric motor and the electric vacuum cleaner. 2. The dust collection performance is prioritized by making it possible to adjust the time for increasing the rotational speed of the agitator and / or the amount of increase in the rotational speed of the agitator when the dust detection means detects a predetermined amount or more of dust. Vacuum cleaner suction tool. 2. The reduction of power consumption is prioritized by enabling adjustment of the time for lowering the rotational speed of the agitator and / or the amount of lowering of the rotational speed of the agitator when the dust detection means detects dust of a predetermined amount or less. Vacuum cleaner suction tool. 4. The control according to claim 1, wherein when the inside of the suction path is determined to be blocked by foreign matter from the detection result of the dust detection means, the two drive sources of the suction air means and the electric motor means are controlled to be separated from the agitator. Vacuum cleaner suction tool. The vacuum cleaner using the suction tool for vacuum cleaners of any one of Claims 1-4.

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