CN111110108B - Dust collector control method and dust collector - Google Patents
Dust collector control method and dust collector Download PDFInfo
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- CN111110108B CN111110108B CN202010006767.0A CN202010006767A CN111110108B CN 111110108 B CN111110108 B CN 111110108B CN 202010006767 A CN202010006767 A CN 202010006767A CN 111110108 B CN111110108 B CN 111110108B
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- fan
- rotating speed
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- control unit
- air inlet
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2805—Parameters or conditions being sensed
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
- A47L9/2842—Suction motors or blowers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention provides a dust collector control method and a dust collector. The method comprises the following steps: when the air inlet is blocked, the fan control unit executes a breathing process, and the breathing process comprises the following steps: firstly, controlling the fan to reduce the rotating speed; then controlling the fan to increase the rotating speed; and if the air inlet is blocked, circularly executing the breathing process. The method can automatically eliminate the blockage, and is convenient to use; the user experience can be further improved.
Description
Technical Field
The invention relates to the field of intelligent equipment, in particular to a dust collector control method and a dust collector.
Background
The working principle of the dust collector is that the fan drives the impeller to rotate, work is done on air, the air in the dust collecting barrel is pumped out, pressure difference is formed between the inside of the barrel and the atmospheric pressure, and therefore objects around the air inlet are sucked into the dust collecting barrel. When the air inlet is blocked by an object, the object and air cannot enter the dust collection barrel, the dust collection barrel is in a vacuum state at the moment, the motor is in no load, the fan still continues to operate at constant power, and the rotating speed of the motor is the highest at the moment, so that the fan is easily overheated or the coil is damaged, and other faults are easily caused.
In order to solve the above problems, in the prior art, a man-made method is adopted to remove the obstacle stuck at the air inlet, or once the obstacle is found, the power supply is cut off to stop the dust collector, and the obstacle is manually removed. However, both of these approaches can be inconvenient to the user.
Therefore, in the long-term research and development, the inventor has conducted a great deal of research on the removal of the clogging object of the vacuum cleaner and has proposed a vacuum cleaner control method and a vacuum cleaner to solve one of the above technical problems.
Disclosure of Invention
The present invention is directed to a method for controlling a vacuum cleaner and a vacuum cleaner, which can solve at least one of the above-mentioned problems. The specific scheme is as follows:
according to a specific embodiment of the present invention, in a first aspect, the present invention provides a control method for a vacuum cleaner, wherein the vacuum cleaner includes an air inlet, a fan for generating a suction force and sucking in foreign objects from the air inlet, and a fan control unit, the control method includes: when the air inlet is blocked, a breathing process is executed, and the breathing process comprises the following steps: firstly, controlling the fan to reduce the rotating speed; then controlling the fan to increase the rotating speed; and if the air inlet is still blocked, circularly executing the breathing process.
Optionally, a first rotation speed threshold is preset in the fan control unit, where the first rotation speed threshold is greater than a normal operating rotation speed of the fan, and the control method further includes: detecting the rotating speed of the fan; and when the rotating speed of the fan reaches the first rotating speed threshold value, judging that the air inlet is blocked.
Optionally, before it is determined again that the air inlet is blocked, the method further includes: resetting the first rotating speed threshold value, so that the current first rotating speed threshold value is larger than the first rotating speed threshold value set last time.
Optionally, the first controlling the fan to reduce the rotation speed and then controlling the fan to increase the rotation speed includes: reducing the power supply current of the fan to reduce the rotating speed of the fan; when the rotating speed of the fan is reduced to a second rotating speed threshold value, increasing the power supply current of the fan to increase the rotating speed of the fan, wherein the second rotating speed threshold value is smaller than the normal working rotating speed of the fan; or when the time length of reducing the power supply current of the fan reaches a preset time threshold, improving the power supply current of the fan to improve the rotating speed of the fan.
Optionally, a restart power is preset in the fan control unit, where the restart power is greater than a normal working power of the fan, and the fan is controlled to increase the rotation speed again, where the restart power includes: and controlling the fan to increase the rotating speed by preset restart power until the fan output power reaches the restart power.
Optionally, if the cycle number of the breathing process reaches a preset cycle number, the fan control unit controls the fan to power off.
According to a second aspect of the present invention, there is provided a vacuum cleaner, wherein the vacuum cleaner includes an air inlet, a fan for generating a suction force and sucking in impurities from the air inlet, and a fan control unit, and the fan control unit executes a breathing process when the air inlet is blocked, and the breathing process includes: and firstly controlling the fan to reduce the rotating speed, then controlling the fan to increase the rotating speed, and if the air inlet is still blocked, circularly executing the breathing process.
Optionally, the vacuum cleaner further comprises a main controller electrically connected to the fan control unit; the fan control unit is used for controlling the fan to reduce the rotating speed and outputting a fan abnormal signal when the air inlet is blocked; the main controller is used for outputting an enabling signal and a rotating speed control signal to the fan control unit after receiving the fan abnormal signal; wherein the rotational speed control signal comprises: the method comprises the following steps of presetting restart power and normal working power of a fan, wherein the presetting restart power is larger than the normal working power; the fan control unit is also used for controlling the fan to supply power according to the enabling signal and controlling the fan to increase the rotating speed according to the rotating speed control signal.
Optionally, the fan abnormal signal includes: and the rotating speed of the fan is reduced to a second rotating speed threshold or the time length of the rotating speed reduction of the fan reaches a preset time threshold, wherein the second rotating speed threshold is less than the normal working rotating speed of the fan.
Optionally, the fan control unit is further configured to: setting a first rotating speed threshold value, wherein the first rotating speed threshold value is greater than the normal working rotating speed of the fan; and resetting the first rotating speed threshold value, so that the current first rotating speed threshold value is larger than the first rotating speed threshold value set in the previous detection.
Compared with the prior art, according to the scheme of the embodiment of the invention, when the blockage of the air inlet is detected, the fan is controlled to reduce the rotating speed firstly, then the fan is automatically controlled to increase the rotating speed, and the process is continuously and circularly repeated until the blockage is eliminated, so that the blockage can be automatically cleaned, and the use is more convenient; the user experience can be further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a flowchart of a method for controlling a vacuum cleaner according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling a vacuum cleaner according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fan motor according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the working state of the respiratory process when the control method of delayed restart is adopted according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a vacuum cleaner according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe … … in embodiments of the present invention, these … … should not be limited to these terms. These terms are used only to distinguish … …. For example, the first … … can also be referred to as the second … … and similarly the second … … can also be referred to as the first … … without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
For the sake of understanding, a specific application scenario of the embodiment of the present application is first described below.
The vacuum cleaner provided by the embodiment of the application comprises but is not limited to an upright vacuum cleaner, a horizontal vacuum cleaner, a handheld vacuum cleaner, an automatic vacuum cleaner (such as a sweeping robot) and the like. The basic structure of the dust collector comprises a power component (a fan motor and a ground brush motor), a cleaning component (a ground brush), a fan for generating suction force and sucking sundries from the air inlet and a dust collecting component. The power component drives the cleaning component to rotate at a certain rotating speed and provides suction force required by sucking the garbage. Clean the part and be connected with dust collecting component directly or through inlet air channel, when cleaning the part when rotating, with rubbish from the air intake inhale extremely under the effect of the suction force that the fan provided finally collect dust collecting component to realize rubbish and clean.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the flowchart of a method for controlling a vacuum cleaner according to an embodiment of the present disclosure is shown. The control method of the dust collector provided by the embodiment of the application comprises the following steps:
s1, when the air inlet is blocked, executing a breathing process;
in a specific embodiment of the present invention, the fan control unit is preset with a first rotation speed threshold, where the first rotation speed threshold is greater than or equal to a normal working rotation speed of the fan, and the normal working rotation speed is a rotation speed of the fan when the air inlet is not blocked. In practical applications, step S1 specifically includes:
s11, detecting the rotating speed of the fan;
in the embodiment of the present invention, the method for detecting the rotational speed of the fan is not limited, and fig. 3 shows a working schematic diagram of the motor, where the diagram includes three stators and a rotor, the three stators are respectively provided with a coil A, B, C, the coil B, C is in an energized state, and the coil a is not energized, and at this time, the position of the coil a can be a basis for detecting the rotational speed of the rotor. Specifically, the rotor speed, i.e., the fan speed, may be calculated according to the formula ω — 2 pi n, where n denotes the rotational speed and ω is the angular speed. The angular velocity ω can be obtained by calculating according to a formula v ═ ω × r and a formula ∈ ═ BLv, where ∈ is an electromotive force, B is a magnetic induction intensity (determined by a magnet on the rotor), L is a length of a wire on the coil, and v represents a velocity at which the wire perpendicularly cuts a magnetic field line, that is, a linear velocity at the radius r. It should be noted that, in the embodiment of the present invention, the fan includes an impeller and a motor, and the fan rotation speed is the motor rotation speed.
And S12, when the rotating speed of the fan reaches the first rotating speed threshold value, judging that the air inlet is blocked.
In practical application, when the dust collector works, the motor drives the impeller to rotate, the impeller applies work to air, the air in the dust collection barrel is pumped out, pressure difference is formed between the interior of the barrel and the atmospheric pressure, and therefore objects around the air inlet are sucked into the dust collection barrel. When the air inlet is blocked, the air amount in the dust collection barrel is reduced, the rotating speed of the fan is gradually increased from the normal working rotating speed at the moment until the air inlet is completely blocked by the object, the object and the air cannot enter the dust collection barrel, the dust collection barrel is in a vacuum state, the fan is equivalent to no load at the moment, and the rotating speed reaches the highest. It should be noted that the rotation speed of the fan and the suction force are in direct proportion, and in the process of gradually increasing the rotation speed of the fan, the suction force is also increased, and an object at the air inlet may be sucked into the dust collecting barrel, so that, preferably, the first rotation speed threshold is greater than the normal operation rotation speed when the fan is not blocked, which can improve the control accuracy and avoid the above-mentioned sudden suction.
S2, the breathing process comprises: firstly, controlling the fan to reduce the rotating speed; then controlling the fan to increase the rotating speed;
in an embodiment of the invention, when a blockage of the air inlet is detected, a breathing process is performed in order to eliminate the blockage. Specifically, step S2 includes:
s21, reducing the power supply current of the fan to reduce the rotating speed of the fan;
specifically, the manner of reducing the power supply current of the fan is not limited, and for example, the output current of the power supply may be controlled to be reduced; or directly stopping power supply to the fan. Preferably, when the rotating speed of the fan reaches the first rotating speed threshold value, the fan control unit powers off the fan, and at the moment, the rotating speed of the fan is gradually reduced based on inertia and may be finally reduced to zero, so that the shutdown is realized.
It should be noted that, in the process of reducing the power supply current of the fan, the rotating speed is smaller and smaller, and the suction force is also smaller and smaller, so that the blockage can fall off by reducing the rotating speed of the fan, thereby eliminating the blockage.
S22, when the rotating speed of the fan is reduced to a second rotating speed threshold value, increasing the power supply current of the fan to increase the rotating speed of the fan, wherein the second rotating speed threshold value is smaller than the normal working rotating speed of the fan;
specifically, when the fan speed is controlled to be increased from a decreasing speed according to the second speed threshold, the fan control unit needs to detect the fan speed in real time, and the detection principle still refers to fig. 3, after the fan control unit controls the motor to be powered off, the A, B, C coils are not powered, at this time, in the process of inertial stop of the rotor, a back electromotive force is generated to the coils A, B, C, and the speed of the rotor, that is, the fan speed, can be detected by detecting the back electromotive force and the position of the rotor corresponding to any one of the three stators. The specific calculation method can be calculated by the method provided by the prior art, and is not described in detail herein.
The second rotation speed threshold may be zero, or may be slightly greater than zero and much smaller than the normal operating rotation speed of the fan. If the second rotation speed threshold is not zero, the second rotation speed threshold is used as the initial rotation speed when the fan supplies power again, the rotation speed is gradually increased, and compared with the rotation speed increase from zero, the power supply time can be shortened, namely, the time for the fan to increase the rotation speed can be reduced; further, energy loss can be reduced.
In another possible implementation manner of the embodiment of the present invention, a method for controlling a rotation speed of the fan to change from a reduction to an increase may include: and when the time length for reducing the power supply current of the fan reaches a preset time threshold, improving the power supply current of the fan to improve the rotating speed of the fan.
In this implementation, the transition of the fan speed is controlled by a preset time threshold. As shown in fig. 4, the fan control unit does not need to detect the fan speed, but controls whether to increase the supply current of the fan according to a preset time threshold (0.5 second). In the embodiment of the invention, the timing is started from the power failure of the fan, and the power can be supplied to the fan again when the preset time threshold is reached. Preferably, the preset time threshold is smaller than the time required by the fan from the start of power failure to the reduction of the rotating speed to zero.
In practical application, the dust collector further comprises a main controller, when the fan is powered off, the fan control unit outputs a fan abnormal signal to the main controller, the main controller outputs an enable signal and a rotating speed control signal to the fan control unit, and the fan control unit controls the fan to be powered on again to improve the rotating speed based on the enable signal and the rotating speed control signal. Here, there are at least the following three ways to control the fan to increase the rotation speed:
in a first possible mode, the power is supplied by the normal working power of the fan, and the normal working power refers to the output power of the fan when the air inlet is not blocked. Specifically, when power is supplied again, the input current of the fan is not changed under the condition of constant voltage, that is, the input current is the normal operating current of the fan, and the output power of the fan is not changed. It will be appreciated that this is a way of restoring the operating state prior to the power outage, and that the blockage may be subsequently removed by performing a number of such breathing processes.
In a second possible mode, power is supplied with preset restart power, and the restart power is greater than the normal working power of the fan. Specifically, the output power of the fan is controlled to be increased to the restart power. In practical application, when power is supplied again, the input current of the fan can be increased under the condition of constant voltage, so that the output power of the fan is increased, the suction force is larger, and the blockage is eliminated. It will be appreciated that the fan control unit automatically selects an upshift restart upon re-powering. Of course, the upshift restart may be manually selected, for example, by pressing a key to select a high-gear rotation speed after power supply.
In a third possible way, the fan speed may be increased by increasing the first speed threshold, so as to eliminate the blockage. Specifically, before the fan control unit detects whether the air inlet is blocked, the first rotation speed threshold value is reset, so that the current first rotation speed threshold value is larger than the first rotation speed threshold value set at the previous time. The fan speed increases with time based on the inherent mechanical characteristics of the fan, and thus the greater the first speed threshold, the longer the power supply time, and the higher the fan speed, the greater the suction force. In this manner, the power supply at the normal operating power or the preset restart power can be selected.
And S3, if the air inlet is still blocked, circularly executing the breathing process.
In practical application, the fan control unit detects the rotating speed of the fan in real time, and after the fan is powered up again each time, if the rotating speed of the fan is detected to still reach the first rotating speed threshold value, the situation that a blockage does not fall off or is not sucked into the dust collection barrel is indicated, and at the moment, the breathing process needs to be executed repeatedly.
Further, the fan control unit is also set with a preset cycle number, and the control method further comprises: and S4, if the cycle number of the breathing process reaches the preset cycle number, the fan control unit controls the fan to be powered off completely, namely the rotating speed of the fan is reduced to zero, and manual cleaning is carried out. The preset cycle number can be set arbitrarily according to actual requirements, for example, 4 times or 5 times.
It should be noted that, in each execution of the breathing process, only one parameter, namely the preset cycle number of the breathing process, may be changed, and one or more of the preset restart power, the first preset threshold, the preset cycle number, and the like may also be changed to eliminate the blockage.
Finally, the control method of the dust collector provided by the embodiment of the invention firstly controls the fan to reduce the rotating speed when the dust collector is detected to be blocked, then automatically controls the fan to increase the rotating speed, and repeats the processes continuously and circularly until the blockage is eliminated, so that the blockage does not need to be cleaned manually, and the use is more convenient; further improving the user experience.
Based on the control method of the dust collector provided by the embodiment, the embodiment of the application also provides the dust collector. Referring to fig. 5, the cleaner includes: the air conditioner comprises an air inlet 50, a fan 51 and a fan control unit 52, wherein the fan 51 is used for generating suction force and sucking objects from the air inlet 50, and the fan control unit 52 is used for executing a breathing process when detecting that the air inlet is blocked, and the breathing process comprises the following steps: firstly, controlling the fan to reduce the rotating speed, and then controlling the fan to increase the rotating speed; and if the air inlet is blocked, circularly executing the breathing process.
In the specific embodiment of the present invention, the fan control unit 52 is preset with: and the first rotating speed threshold value is greater than the normal working rotating speed of the fan. In practical application, when the dust collector works, the motor drives the impeller to rotate, the impeller applies work to air, the air in the dust collection barrel is pumped out, pressure difference is formed between the interior of the barrel and the atmospheric pressure, and therefore objects around the air inlet are sucked into the dust collection barrel. When the air inlet is blocked, the air amount in the dust collection barrel is reduced, the rotating speed of the fan is gradually increased from the normal working rotating speed at the moment until the air inlet is completely blocked by the object, the object and the air cannot enter the dust collection barrel, the dust collection barrel is in a vacuum state, the fan is equivalent to no load at the moment, and the rotating speed reaches the highest. It should be noted that the rotation speed of the fan and the suction force are in direct proportion, and in the process of gradually increasing the rotation speed of the fan, the suction force is also increased, and an object at the air inlet may be sucked into the dust collecting barrel, so that, preferably, the first rotation speed threshold is greater than the normal operation rotation speed of the fan, which can improve the accuracy of the control method and avoid the above-mentioned sudden suction.
Further, the fan control unit 52 includes a detection circuit 520, a fan controller 521, and a motor drive circuit 522. The detection circuit 520 is configured to detect the rotational speed of the fan and send the rotational speed to the fan controller 521.
In the embodiment of the present invention, the method for detecting the rotational speed of the fan by the detection circuit 520 is not limited, and reference may be specifically made to a method for calculating the rotational speed of the fan in the prior art, which is not described herein again. It should be noted that, in the embodiment of the present invention, the fan includes an impeller and a motor, and the fan rotation speed is the motor rotation speed.
The fan controller 521 is configured to execute a breathing process when the fan speed reaches the first speed threshold, where the breathing process includes: the fan is controlled to reduce the rotating speed firstly, and then the fan is controlled to increase the rotating speed.
In an embodiment of the invention, when a blockage of the air inlet is detected, a breathing process is performed in order to eliminate the blockage. Specifically, the fan controller 521 is configured to: when the fan speed reaches the first speed threshold, sending a speed reduction signal to the motor drive circuit 522; the motor drive circuit 522 is configured to: receives the rotation speed reduction signal and reduces the supply current of the fan 51.
In practical applications, the reduced speed signal includes the situation that the input voltage is zero or the output current is reduced. In the embodiment of the present invention, when the motor driving circuit 522 stops inputting the voltage to the fan, the fan speed gradually decreases based on inertia, and may eventually decrease to zero, so that the shutdown is realized.
It should be noted that, in the process of reducing the rotating speed of the fan, the rotating speed is smaller and smaller, and the suction force is also smaller and smaller, so that the blockage can fall off by reducing the rotating speed of the fan, and the blockage is eliminated.
The fan controller 521 is further configured to control the motor driving circuit 522 to increase the supply current of the fan to increase the rotation speed when the rotation speed of the fan is reduced to a second rotation speed threshold, where the second rotation speed threshold is smaller than the normal operating rotation speed of the fan.
Specifically, when the fan controller 521 controls the fan rotation speed to be changed from a reduced rotation speed to an increased rotation speed according to a second rotation speed threshold, the detection circuit 520 needs to detect the fan rotation speed in real time, please refer to fig. 3 for the detection principle, when the fan controller 521 controls the fan to be powered off, the A, B, C coils are not powered, at this time, in the process of the inertial stop of the rotor, a back electromotive force is generated to the coils A, B, C, and the rotation speed of the rotor, that is, the fan rotation speed, can be detected by detecting the back electromotive force and the position of the rotor corresponding to any one of the three stators. The above specific calculation method can be calculated by a method improved in the prior art, and is not described in detail here.
The second rotation speed threshold may be zero, or may be slightly greater than zero and much smaller than the normal operating rotation speed when the fan is not blocked. If the second rotation speed threshold is not zero, the second rotation speed threshold is used as the initial rotation speed when the fan is powered up again, and the rotation speed is gradually increased, so that the power supply time can be shortened, namely, the time required by the fan for increasing the rotation speed can be reduced compared with the case of increasing the rotation speed from zero; further, energy loss can be reduced.
In other possible implementation manners of the embodiment of the present invention, the fan controller 521 is further configured to: when the time length of the reduced rotating speed of the fan reaches a preset time threshold value, the motor driving circuit 522 is controlled to increase the power supply current of the fan so as to increase the rotating speed of the fan.
In this implementation manner, the change of the rotation speed is controlled by the preset time threshold, and the detection circuit 520 only needs to control the power supply to the fan 51 by the preset time threshold (0.5 second) without detecting the rotation speed of the fan, that is, the timing is started from the power failure of the fan, and when the preset time threshold is reached, the power supply to the fan 51 can be resumed. Preferably, the preset time threshold is smaller than the time required for the fan 51 to reduce the rotation speed to zero from the power-off state.
In practical application, the vacuum cleaner further includes a main controller 53, when the fan 51 is powered off, the fan controller 521 outputs a fan abnormal signal to the main controller 53, after the main controller 53 receives the fan abnormal signal, the main controller 53 outputs an enable signal and a rotation speed control signal to the fan controller 521, and the fan controller 521 controls the motor driving circuit 522 to supply power to the fan 51 and controls to increase the rotation speed of the fan based on the enable signal and the rotation speed control signal.
Wherein, fan abnormal signal includes: and the rotating speed of the fan is reduced to a second rotating speed threshold value or the rotating speed reduction time of the fan reaches the preset time threshold value. The rotational speed control signal includes: the normal working power or the preset restarting power of the fan is larger than the normal working power. In some implementations of specific embodiments of the present invention, the fan controller 521 is configured to control the motor driving circuit 522 to supply power at a preset restart power. Specifically, when power is supplied again, the input current of the fan is increased under the condition of constant voltage, so that the output power of the fan is increased to make the suction force larger, and the blockage is eliminated. It will be appreciated that upon re-powering, an upshift restart may be automatically set. Of course, the upshift may be manually restarted, for example, after power supply, the high-gear rotation speed is manually selected by pressing a key.
In other embodiments, the fan controller 521 is configured to control the motor driver circuit 522 to supply power at the normal operating power of the fan. Specifically, when power is supplied again, the input current of the fan is not changed under the condition of constant voltage, namely, the normal working current of the fan before power failure is input. It will be appreciated that this is a way of restoring the operating state prior to the power outage, and that by performing the breathing process a number of times the blockage can be removed.
In other embodiments, the fan controller 521 may increase the fan speed by increasing the first speed threshold to eliminate the blockage. Specifically, when the detection circuit 520 detects whether the air inlet is blocked every time, the first rotation speed threshold is reset, so that the current first rotation speed threshold is greater than the previously set first rotation speed threshold. The fan speed increases with time based on the inherent mechanical characteristics of the fan, and thus the greater the first speed threshold, the longer the power supply time, and the higher the fan speed, the greater the suction force. In this manner, the power supply can be selected to be performed at the normal operation power or the preset restart power.
Further, the fan controller 521 is also configured to: and if the air inlet is still blocked, circularly executing the breathing process. Specifically, after the blower controller 521 executes a breathing process (i.e. a period of power off and power supply), the detection circuit 520 detects whether the blower speed reaches the first speed threshold, and if the blower speed still reaches the first speed threshold, it indicates that the blockage does not fall or is sucked into the dust collecting bucket, and at this time, the breathing process needs to be executed repeatedly.
Further, the fan controller 521 is set with a preset number of cycles, and the fan controller 521 is further configured to: when the cycle number of the breathing process reaches the preset cycle number, the fan 51 is controlled to be powered off completely, namely the rotating speed of the fan is controlled to be reduced to zero, and then the blockage is cleaned manually. The preset cycle number can be set arbitrarily according to actual requirements, for example, 4 times or 5 times.
It should be noted that, in each execution of the breathing process, only one parameter, namely the preset cycle number of the breathing process, may be changed, and one or more of the preset restart power, the first preset threshold, the preset cycle number, and the like may also be changed to eliminate the blockage.
Finally, when the air inlet is blocked, the dust collector provided by the embodiment of the invention firstly controls the fan to reduce the rotating speed, then automatically controls the fan to increase the rotating speed, and repeats the processes continuously and circularly until the blockage is eliminated, so that the blockage can be automatically cleaned, and the dust collector is convenient to use; further improving the user experience.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The system or the device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The above examples are only intended to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (7)
1. A control method of a vacuum cleaner, wherein the vacuum cleaner includes an air inlet, a fan for generating a suction force and sucking an object from the air inlet, and a fan control unit, the control method comprising:
detecting the rotating speed of the fan; when the rotating speed of the fan reaches a first rotating speed threshold value preset in the fan control unit, judging that the air inlet is blocked, wherein the first rotating speed threshold value is greater than the normal working rotating speed of the fan;
when the air inlet is blocked, the fan control unit executes a breathing process, and the breathing process comprises the following steps: firstly, controlling the fan to be powered off to reduce the rotating speed; when the rotating speed of the fan is reduced to a second rotating speed threshold value, receiving an enabling signal and a rotating speed control signal output by a main controller, controlling the fan to automatically restart and increasing the rotating speed; simultaneously resetting the first rotating speed threshold value so that the current first rotating speed threshold value is larger than the previously set first rotating speed threshold value;
detecting the rotating speed of the fan again, and if the air inlet is still blocked, circularly executing the breathing process; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan;
and the control of the fan restart is to supply power by using the normal working power of the fan or preset restart power, and the restart power is greater than the normal working power.
2. The method of claim 1, wherein controlling the fan to power down to reduce the speed of the fan and then controlling the fan to restart and increase the speed of the fan comprises:
and when the power-off duration of the fan is controlled to reach a preset time threshold, the fan is controlled to restart so as to improve the rotating speed of the fan.
3. The method of claim 1, wherein a restart power is preset in the fan control unit,
and controlling the fan to increase the rotating speed by the preset restart power until the fan output power reaches the restart power.
4. The method of claim 1, wherein the fan control unit controls the fan to be powered off if the number of cycles of the breathing process reaches a preset number of cycles.
5. A dust collector comprises an air inlet, a fan used for generating suction force and sucking sundries from the air inlet, and a fan control unit,
the detection circuit is used for detecting the rotating speed of the fan;
the fan control unit is used for judging that the air inlet is blocked when the rotating speed of the fan reaches a first rotating speed threshold value, and executing a breathing process, wherein the breathing process comprises the following steps: firstly, controlling the fan to be powered off to reduce the rotating speed; when the rotating speed of the fan is reduced to a second rotating speed threshold value, receiving an enabling signal and a rotating speed control signal output by a main controller, controlling the fan to automatically restart and increase the rotating speed, and resetting the first rotating speed threshold value at the same time so that the current first rotating speed threshold value is larger than the first rotating speed threshold value set at the previous time;
the fan control unit is also used for detecting the rotating speed of the fan again, and if the air inlet is blocked, the breathing process is executed in a circulating mode;
wherein the first rotational speed threshold is greater than a normal operating rotational speed of the fan; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan; the fan control unit controls the fan to restart to supply power to the fan at the normal working power or the preset restarting power of the fan, and the restarting power is larger than the normal working power.
6. The vacuum cleaner of claim 5, further comprising a main controller electrically connected to the fan control unit;
the fan control unit is used for controlling the fan to reduce the rotating speed and outputting a fan abnormal signal when the air inlet is blocked;
the main controller is used for outputting an enabling signal and a rotating speed control signal to the fan control unit after receiving the fan abnormal signal; wherein the rotational speed control signal comprises: the method comprises the following steps of presetting restart power and normal working power of a fan, wherein the presetting restart power is larger than the normal working power;
the fan control unit is also used for controlling the fan to supply power according to the enabling signal and controlling the fan to increase the rotating speed according to the rotating speed control signal.
7. The vacuum cleaner of claim 6, wherein the fan anomaly signal comprises: and the rotating speed of the fan is reduced to a second rotating speed threshold or the time length of the rotating speed reduction of the fan reaches a preset time threshold, wherein the second rotating speed threshold is less than the normal working rotating speed of the fan.
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| CN202111594843.5A CN114305203B (en) | 2020-01-03 | 2020-01-03 | Dust collector control method and dust collector |
| CN202010006767.0A CN111110108B (en) | 2020-01-03 | 2020-01-03 | Dust collector control method and dust collector |
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| CN112021985B (en) * | 2020-08-27 | 2022-04-29 | 追觅创新科技(苏州)有限公司 | Handheld dust collector and control method |
| CN112168065B (en) * | 2020-09-29 | 2023-04-28 | 追觅创新科技(苏州)有限公司 | Method, device, apparatus and storage medium for determining blockage of air duct in cleaning equipment |
| EP4183467A1 (en) * | 2021-11-23 | 2023-05-24 | Philips Domestic Appliances Holding B.V. | Filter cleaning of an air treatment device |
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| CN114305203B (en) | 2023-06-30 |
| CN111110108A (en) | 2020-05-08 |
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