JP2018196675A - Vacuum cleaner - Google Patents

Abstract

To provide a vacuum cleaner capable of accurately determining an amount of dust in a dust chamber.SOLUTION: The vacuum cleaner includes: control means 4 that controls input power of an electric blower 1 in response to a signal from a dust detection sensor 6 for detecting dust passing through a ventilation path (not shown) communicated to a dust collection chamber (not shown); and a rotation speed detection sensor 30 that detects a rotation speed of the electric blower 1. When the dust detection sensor 6 detects dust, the vacuum cleaner increases the input power of the electric blower 1, and when the rotation speed detected by the rotation speed detection sensor 30 becomes a prescribed value or more, decreases the input power. Even when driving it at a low input power that is difficult to determine, the vacuum cleaner temporarily increases the input power to increase the rotation speed and, when the rotation speed detected by the rotation speed detection sensor 30 becomes the prescribed value or more, decreases the input power so as to suppress temperature rise in the electric blower 1 and accurately determine the amount of dust in the dust collection chamber.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vacuum cleaner that can accurately determine the amount of dust in a dust collection chamber.

  There is a conventional vacuum cleaner as shown in FIG. FIG. 7 is a circuit diagram of a conventional vacuum cleaner.

  In FIG. 7, the conventional vacuum cleaner includes a current sensor 3 for detecting a current flowing through the electric blower 1, a display means 5 for displaying the amount of dust accumulated in a dust collection chamber (not shown), and an electric motor. Drive means 2 for driving the blower 1 and control means 4 for controlling the input power of the electric blower 1 in accordance with a signal from the dust detection sensor 6 for detecting dust, the dust detection sensor 6 detecting dust. The electric power of the electric blower 1 is controlled so as to increase, and the display means according to the current value detected by the current sensor 3 while the dust detection sensor 6 is not detecting dust. 5 (see, for example, Patent Document 1).

JP 2001-087191 A

  However, in such a conventional vacuum cleaner, when the dust accumulates and the current value detected by the current sensor 3 becomes a predetermined value or less, the input power of the electric blower 1 is reduced to reduce the electric blower. However, when the change in the current value due to the amount of dust is small, it is difficult to determine the amount of dust in the dust chamber. In addition, a similar problem occurs when the amount of dust is determined based on the number of rotations of the electric blower 1.

  The present invention solves the above-described conventional problems, and an object thereof is to more accurately determine the amount of dust in a dust collection chamber.

  In order to solve the above-described conventional problems, the vacuum cleaner of the present invention includes a vacuum cleaner main body including an electric blower and a dust collection chamber, and dust detection for detecting dust passing through a ventilation passage communicating with the dust collection chamber. A sensor, a control means for controlling input power of the electric blower in accordance with a signal from the dust detection sensor, and a rotation speed detection sensor for detecting the rotation speed of the electric blower, wherein the dust detection sensor detects dust. The input power of the electric blower is controlled so as to increase, and the input power of the electric blower is reduced when the rotational speed detected by the rotational speed detection sensor becomes a predetermined value or more. Even during operation with low input power, which is difficult to determine, the rotational speed is increased by controlling to temporarily increase the input power, and the rotational speed detected by the rotational speed detection sensor. Is given It is possible to reduce the input power when it is above. Thereby, it is possible to accurately determine the suppression of the temperature rise of the electric blower and the amount of dust in the dust collection chamber.

  The vacuum cleaner of the present invention can accurately determine the amount of dust in the dust collection chamber even during operation with low input power, where it is difficult to determine the amount of dust in the dust collection chamber.

Partial sectional drawing of the vacuum cleaner in the 1st Embodiment of this invention Circuit diagram of the vacuum cleaner Relationship diagram between the operation time of the vacuum cleaner and the input power of the electric blower Flow chart of dust amount determination of the vacuum cleaner The figure which shows the relationship between the operating time of the vacuum cleaner in Embodiment 2 of this invention, the passage degree of dust, and the input electric power of an electric blower. The figure which shows transition of the input electric power of an electric blower with the operation time progress of the vacuum cleaner in Embodiment 3 of this invention. Circuit diagram of conventional vacuum cleaner

  According to a first aspect of the present invention, there is provided a vacuum cleaner body including an electric blower and a dust collection chamber, a dust detection sensor for detecting dust passing through a ventilation passage communicating with the dust collection chamber, and a signal from the dust detection sensor. And a control means for controlling the input power of the electric blower, and a rotation speed detection sensor for detecting the rotation speed of the electric blower. When the dust detection sensor detects dust, the input power of the electric blower is changed. It is controlled so as to increase, and when the rotational speed detected by the rotational speed detection sensor exceeds a predetermined value, the input power of the electric blower is controlled to be small. Even during operation of input power, control is performed to increase the input power temporarily to increase the rotation speed, and input when the rotation speed detected by the rotation speed detection sensor exceeds a predetermined value. Reduce power It is possible. Thereby, it is possible to accurately determine the suppression of the temperature rise of the electric blower and the amount of dust in the dust collection chamber.

  In particular, the second invention calculates the degree of passage of dust according to the amount of dust detected by the dust detection sensor of the first invention, and when the degree of passage exceeds a certain value, Since the input power is controlled to increase, an opportunity to increase the input power is determined according to the amount of dust in the cleaning location, and the amount of dust in the dust collection chamber can be determined more accurately.

  In the third invention, in particular, when the input power of the electric blower of the first or second invention is low, the input power is controlled to increase when a certain period of time elapses, so that dust does not pass through the dust detection sensor. Even in this case, the input power can be increased, and the amount of dust in the dust collection chamber can be determined more accurately.

  The fourth aspect of the invention controls the electric blower of any one of the first to third aspects of the invention so as to increase the duration of time during which the input power increases, and the electric blower is collected in a stable state. The amount of dust in the dust chamber can be determined more accurately.

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

(Embodiment 1)
FIG. 1 is a partial sectional view of a vacuum cleaner according to a first embodiment of the present invention, FIG. 2 is a circuit diagram of the vacuum cleaner, and FIG. 3 is an operation time of the vacuum cleaner and an input of an electric blower FIG. 4 is a flowchart of the dust amount determination of the electric vacuum cleaner.

1-4, the vacuum cleaner 10 in this Embodiment is the vacuum cleaner main body 9 which incorporated the electric blower 1 and the dust collection chamber 8, the drive means 2 for controlling rotation of the electric blower 1, and electric A rotation speed detection sensor 30 for detecting the value of the rotation speed of the blower 1, a control means 4 for controlling the operation of the vacuum cleaner 10, a display means 5 for informing the amount of dust sucked, The user arbitrarily selects the dust detection sensor 6 for detecting dust passing through a ventilation path (not shown) communicating with the dust collection chamber 8 and the input power of the electric blower 1 divided into a plurality of stages. One of the selection means 7 is an “automatic position” in which the electric blower 1 is operated according to the output of the dust detection sensor 6.

  First, when the user selects “automatic position” in which the vacuum cleaner 10 is operated according to the output of the dust detection sensor 6 by the selection means 7, when dust is not detected by the dust detection sensor 6, For example, the input power of the electric blower 1 is set to be a first predetermined value, for example, about 60 W. On the other hand, when dust is detected by the dust detection sensor 6, as shown in FIG. Control is performed to increase the input power of the electric blower 1 to a second predetermined value, for example, about 140 W.

  At this time, if dust increases in the dust collection chamber 8 provided in the vacuum cleaner 10, the air volume decreases and the degree of vacuum in the dust collection chamber 8 increases. Therefore, the electric blower 1 The load on is reduced. Thereby, the rotation speed of the electric blower 1 increases, and the value of the rotation speed detected by the rotation speed detection sensor 30 also increases.

  When the rotational speed value detected by the rotational speed detection sensor 30 is sent to the control means 4 and the rotational speed value exceeds a predetermined value, a large amount of dust accumulates in the dust collection chamber 8. Then, a signal is sent from the control means 4 so that the display means 5 displays the accumulation state. At the same time, the input power of the electric blower 1 is reduced to prevent the electric blower 1 from being heated.

  If a plurality of the predetermined values are provided, as the dust in the dust collection chamber 8 increases, it can be displayed in stages on the display means 5 and the usability is further improved. is there.

  In operation with low input power such as “automatic position”, the difference in the rotational speed of the electric blower 1 between when dust is accumulated in the dust collection chamber 8 and when it is not accumulated is small. Depending on the difference, it is difficult to accurately determine the amount of dust in the dust collection chamber 8. However, the input power is increased to a third predetermined value, for example, about 200 W in accordance with the output of the dust detection sensor 6, and the above determination is made during that time, so that the inside of the dust collection chamber 8 can be accurately detected even during operation with low input power It is possible to determine the amount of dust.

  Further, when dust accumulates in the dust collection chamber 8 and the electric blower 1 is operated and controlled with low input power, the input power of the electric blower 1 is reduced even if dust detection sensor 6 detects dust in the air passage. The heat generation of the electric blower 1 is suppressed by controlling with a constant input power without increasing the power.

  In the above embodiment, when dust is detected by the dust detection sensor 6, control is performed to increase the input power of the electric blower 1 to about 140 W. However, as shown in FIG. When the detection sensor 6 detects dust, the input power of the electric blower 1 is increased to about 200 W, and if the input is controlled to continue for a certain period of time, the rotational speed of the electric blower 1 is increased. It can be stabilized at a constant value, and the amount of dust in the dust collection chamber 8 can be determined more accurately.

(Embodiment 2)
FIG. 5 is a diagram illustrating the relationship between the operation time of the electric vacuum cleaner, the degree of dust passage, and the input power of the electric blower in Embodiment 2 of the present invention. Note that the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 5, the vacuum cleaner 10 in the present embodiment increases the input power only to a second predetermined value, for example, about 140 W when the degree of passing of dust detected by the dust detection sensor 6 is low. When the value of the degree of dust passage is not less than a certain value, the input power is controlled to increase to a third predetermined value, for example, about 200 W, and the dust inside the dust collection chamber 8 is sucked when a large amount of dust is sucked. The amount of dust is determined.

  Accordingly, it is possible to suppress the clogging of dust in the air passage and to control the input power in accordance with the amount of dust, so that the operation time can be improved.

(Embodiment 3)
FIG. 6 shows the transition of the input power of the electric blower as the operation time of the electric vacuum cleaner in Embodiment 3 of the present invention elapses. The same parts as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the vacuum cleaner 10 according to the present embodiment, the control unit 4 outputs a signal from the dust detection sensor 6 for a certain period after the control to increase the input power of the electric blower 1 to a third predetermined value, for example, about 200 W is performed. The input power is increased only to a second predetermined value, for example, about 140 W, and control is performed to automatically increase the input power to a third predetermined value, for example, about 200 W after a certain time has passed. It is what you want to do. Thereby, even when the passage degree of dust is low, the amount of dust in the dust collection chamber 8 can be determined periodically.

  As described above, according to the vacuum cleaner in the above-described embodiment, dust collection during operation at low input power, which could not be realized by the method for determining the amount of dust in the dust collection chamber 8 of the conventional vacuum cleaner, is not possible. The amount of dust in the chamber 8 is determined by increasing the input power when the dust detection sensor 6 detects the dust, thereby increasing the number of revolutions of the electric blower 1 and determining the amount of dust in the dust collection chamber 8. The determination can be performed more accurately.

  Further, the input power is increased only to a second predetermined value, for example, about 140 W when the dust passage degree is low, and the input power is set to a third predetermined value when the dust passage degree is a certain value or more. For example, by performing the control to increase the power to about 200 W, it is possible to suppress the clogging of dust in the air passage and to control the input power in accordance with the amount of dust, so that the operation time can be improved.

  As described above, since the vacuum cleaner according to the present invention can accurately determine the amount of dust in the dust collection chamber, it accurately determines the amount of dust in the dust collection chamber while maintaining a long operation time. It can be applied to various vacuum cleaners.

DESCRIPTION OF SYMBOLS 1 Electric blower 2 Drive means 4 Control means 5 Display means 6 Dust detection sensor 7 Selection means 8 Dust collection chamber 9 Vacuum cleaner main body 10 Vacuum cleaner 30 Rotation number detection sensor

Claims (4)

A vacuum cleaner main body having an electric blower and a dust collection chamber, a dust detection sensor for detecting dust passing through a ventilation passage communicating with the dust collection chamber, and a signal from the dust detection sensor A control means for controlling input power and a rotation speed detection sensor for detecting the rotation speed of the electric blower are provided, and when the dust detection sensor detects dust, the input power of the electric blower is controlled to be increased. An electric vacuum cleaner that controls the input power of the electric blower to be small when the rotational speed detected by the rotational speed detection sensor becomes a predetermined value or more. The degree of dust passage is calculated according to the amount of dust detected by the dust detection sensor, and control is performed to increase the input power of the electric blower when the degree of passage exceeds a certain value. The vacuum cleaner described. The electric vacuum cleaner according to claim 1 or 2, wherein the input power is controlled to increase when a certain period of time has elapsed when the input power of the electric blower is low. The electric vacuum cleaner according to any one of claims 1 to 3, wherein the electric vacuum blower is controlled so as to extend a duration of time during which input power of the electric blower increases.

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