CN114305203B - Dust collector control method and dust collector - Google Patents
Dust collector control method and dust collector Download PDFInfo
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- CN114305203B CN114305203B CN202111594843.5A CN202111594843A CN114305203B CN 114305203 B CN114305203 B CN 114305203B CN 202111594843 A CN202111594843 A CN 202111594843A CN 114305203 B CN114305203 B CN 114305203B
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Vacuum Cleaner (AREA)
Abstract
The invention provides a dust collector control method and a dust collector. The dust collector comprises an air inlet, a fan for generating suction force and sucking objects from the air inlet, and a fan control unit, wherein the control method comprises the following steps: detecting the rotating speed of the fan; when the rotating speed of the fan reaches a first rotating speed threshold, the fan control unit judges that the air inlet is blocked, wherein the first rotating speed threshold is larger 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: firstly, controlling the fan to be powered off; when the rotating speed of the fan is reduced to a second rotating speed threshold value, controlling the fan to restart; detecting the rotating speed of the fan again, and if the air inlet is still blocked, executing the breathing process circularly; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan; and if the respiration process reaches the preset cycle times, the fan control unit controls the fan to be thoroughly powered off.
Description
The present application is a divisional application with application number 202010006767.0, application date 2020, 01 and 03, and the name of the present application is "dust collector control method" and dust collector ".
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 applied to air, the air in the dust accumulation barrel is pumped out, and the pressure difference is formed between the barrel and the atmospheric pressure, so that objects around the air inlet are sucked into the dust collection 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, the motor is equivalent to no load, the fan still continuously operates with constant power, the rotating speed of the motor is the highest, and faults such as overheating of the fan or damage of the coil are easily caused.
Aiming at the situation, the prior art adopts a manual mode to remove the obstacle clamped at the air inlet, or cuts off the power supply to stop the dust collector once the blockage is found, and manually removes the obstacle. However, both of these methods are inconvenient for the user.
Therefore, in long-term research and development, the inventors have made a great deal of study on removing plugs from a vacuum cleaner, and have proposed a vacuum cleaner control method and a vacuum cleaner to solve one of the above problems.
Disclosure of Invention
The invention aims to provide a dust collector control method and a dust collector, which can solve at least one technical problem. The specific scheme is as follows:
according to a first aspect of the present invention, there is provided a control method of a vacuum cleaner, wherein the vacuum cleaner includes an air inlet, a blower for generating a suction force and sucking an object from the air inlet, and a blower control unit, the control method comprising:
detecting the rotating speed of the fan; when the rotating speed of the fan reaches the first rotating speed threshold, the fan control unit judges that the air inlet is blocked, wherein the first rotating speed threshold is larger 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: firstly, controlling the fan to be powered off so as to reduce the rotating speed; when the rotating speed of the fan is reduced to a second rotating speed threshold value, controlling the fan to restart so as to increase the rotating speed;
detecting the rotating speed of the fan again, and if the air inlet is still blocked, executing the breathing process circularly; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan;
and if the respiration process reaches the preset cycle times, the fan control unit controls the fan to be thoroughly powered off.
Optionally, before the fan control unit determines that the air inlet is blocked, the method further includes: and resetting the first rotation speed threshold value so that the current first rotation speed threshold value is larger than or equal to the first rotation speed threshold value set in the previous time.
Optionally, the controlling the fan to turn off to reduce the rotation speed, and then controlling the fan to restart and increase the rotation speed further includes: when the power-off time of the fan is controlled to reach a preset time threshold, the fan is controlled to restart so as to increase the rotating speed of the fan.
Optionally, the controlling the fan to restart to increase the rotation speed includes: and controlling the output power of the fan to be increased to normal working power or preset restarting power, wherein the preset restarting power is larger than the normal working power of the fan.
According to a second aspect of the present invention, there is provided a vacuum cleaner, wherein the vacuum cleaner includes an air inlet, a blower for generating a suction force and sucking sundries from the air inlet, and a blower control unit, wherein the blower control unit is configured to detect a rotation speed of the blower; when the rotating speed of the fan reaches the first rotating speed threshold, the fan control unit judges that the air inlet is blocked, wherein the first rotating speed threshold is larger 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: firstly, controlling the fan to be powered off so as to reduce the rotating speed; when the rotating speed of the fan is reduced to a second rotating speed threshold value, controlling the fan to restart so as to increase the rotating speed; the fan control unit is also used for detecting the rotating speed of the fan again, and if the air inlet is still blocked, the breathing process is circularly executed; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan; and if the respiration process reaches the preset cycle times, the fan control unit controls the fan to be thoroughly powered off.
Optionally, the fan control unit is further configured to: and resetting the first rotation speed threshold value so that the current first rotation speed threshold value is larger than or equal to the first rotation speed threshold value set in the previous time.
Optionally, the fan control unit is further configured to: when the power-off time of the fan is controlled to reach a preset time threshold, the fan is controlled to restart so as to increase the rotating speed of the fan.
Optionally, the fan control unit is further configured to: and controlling the output power of the fan to be increased to normal working power or preset restarting power, wherein the preset restarting power is larger than the normal working power of the fan.
Compared with the prior art, the scheme of the embodiment of the invention controls the fan to reduce the rotating speed when the air inlet is detected to be blocked, then automatically controls the fan to increase the rotating speed, and repeatedly repeats the above processes continuously 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 evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. 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 flowchart 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 illustrating the working state of the breathing process when the control method of delayed restarting is adopted according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dust collector according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 this application 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, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are 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 only used to distinguish … …. For example, the first … … may also be referred to as the second … …, and similarly the second … … may 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 phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product 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 product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such element.
For easy understanding, a specific application scenario of the embodiments of the present application will be first described below.
The dust collectors provided by the embodiments of the present application include, but are not limited to, upright cleaners, canister cleaners, hand-held cleaners, and automatic cleaners (e.g., sweeping robots), among others. The basic structure of the dust collector comprises a power part (a fan motor and a ground brush motor), a cleaning part (a ground brush), a fan for generating suction force and sucking sundries from the air inlet and a dust collecting part. The power component drives the cleaning component to rotate at a certain rotation speed and provides suction force required by sucking garbage. The cleaning part is directly connected with the dust collecting part or is connected with the dust collecting part through an air inlet channel, when the cleaning part rotates, garbage is sucked into the air inlet channel from the air inlet under the action of the suction force provided by the fan, and finally the garbage is collected into the dust collecting part, so that garbage cleaning is realized.
Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the flow chart of a method for controlling a vacuum cleaner according to an embodiment of the present application is shown. The dust collector control method provided by the embodiment of the application comprises the following steps:
s1, executing a breathing process when the air inlet is blocked;
in a specific embodiment of the present invention, the fan control unit is provided with a first rotation speed threshold in advance, 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 refers to a rotation speed of the fan when the air inlet is not blocked. In practical application, step S1 specifically includes:
s11, detecting the rotating speed of the fan;
in a specific embodiment of the present invention, the method for detecting the rotational speed of the fan is not limited, fig. 3 shows a working schematic diagram of a motor, where the diagram includes three stators and a rotor, the three stators are respectively provided with coils A, B, C, the coils B, C are in an energized state, the coil a is not energized, and the position of the coil a can be used as a basis for detecting the rotational speed of the rotor. Specifically, the rotor speed, i.e. the fan speed, can be calculated according to the formula ω=2ρn, where n represents the speed and ω is the angular speed. The above-mentioned angular velocity ω can be obtained by calculation according to the formula v=ω×r and the formula ε= BLv, where ε is electromotive force, B is magnetic induction (determined by the magnet on the rotor), L is the length of the wire on the coil, v is the velocity of the wire perpendicular to the cutting magnetic field line, i.e. the linear velocity at the radius r, and the specific detection method can refer to the calculation method related to the fan rotation speed in the prior art, which is not described in detail herein. It should be noted that, in the embodiment of the present invention, the fan includes an impeller and a motor, and the rotation speed of the fan is that of the motor.
And S12, judging that the air inlet is blocked when the rotating speed of the fan reaches the first rotating speed threshold value.
In practical application, when the dust collector works, the motor drives the impeller to rotate, work is applied to air, and the air in the dust collection barrel is pumped out, so that the pressure difference is formed between the barrel and the atmospheric pressure, and objects around the air inlet are sucked into the dust collection barrel. When the air inlet is blocked, the air quantity in the dust collection barrel is reduced, the rotating speed of the fan is gradually increased from the normal working rotating speed until the air inlet is completely blocked by objects, the objects 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, and the rotating speed is highest. It should be noted that, fan rotational speed and suction size are in direct proportion, and in the in-process that fan rotational speed increases gradually, suction also is increasing, the object of air intake department can be inhaled in the dust collection bucket, therefore, preferably, first rotational speed threshold value is greater than the normal operating speed when the fan is unblock, can improve the degree of accuracy of control like this, avoids taking place the circumstances of above-mentioned suddenly inhaling.
S2, the respiration process includes: firstly, controlling the fan to reduce the rotating speed; controlling the fan to increase the rotating speed;
in a specific embodiment of the present invention, when the air inlet is detected to be blocked, a respiration process is performed in order to remove 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 supply current of the blower is not limited, for example, the output current of the power supply can be controlled to be reduced; or directly stopping power supply to the fan. Preferably, when the fan rotation speed reaches the first rotation speed threshold value, the fan control unit powers off the fan, and at the moment, the fan rotation speed gradually decreases based on inertia, and finally the fan rotation speed may decrease to zero, so that shutdown is realized.
In the process of reducing the power supply current of the fan, the rotating speed is smaller and smaller, and the suction force is smaller and smaller, so that the blocking object can be dropped by reducing the rotating speed of the fan, and the blocking is eliminated.
S22, when the rotating speed of the fan is reduced to a second rotating speed threshold value, the power supply current of the fan is increased 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 changed from reduction to increase according to the second speed threshold, the fan control unit needs to detect the fan speed in real time, and the detection principle is that please continue to refer to fig. 3, when the fan control unit controls the motor to be powered off, the A, B, C coils are not powered any more, and at this time, in the process of stopping the inertia of the rotor, reverse 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 reverse electromotive force and the rotor position corresponding to any one of the three stators. The specific calculation method can be calculated by a method provided by the prior art, and will not be described in detail here.
The second rotation speed threshold value can be zero, or can be slightly greater than zero and far less than the normal working rotation speed of the fan. If the second rotation speed threshold is not zero, the fan is powered up again by taking the second rotation speed threshold as an initial rotation speed and gradually increasing the rotation speed, so that the power supply time can be shortened, namely the time required by the fan to increase the rotation speed can be reduced compared with the rotation speed which is increased from zero; further energy losses can be reduced.
In other possible implementations of the embodiment of the present invention, a method for controlling the rotation speed of the fan from decreasing to increasing may include: when the duration of the power supply current of the fan is reduced to reach a preset time threshold, the power supply current of the fan is increased to increase 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 rotation speed, but controls whether to increase the supply current of the fan according to a preset time threshold (0.5 seconds). In the embodiment of the invention, the timing is started from the power failure of the fan, and the fan can be powered again when the preset time threshold is reached. Preferably, the preset time threshold is less than the time required for the blower to drop to zero from the start of power down.
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 enabling signal and a rotating speed control signal to the fan control unit, and the fan control unit controls to supply power to the fan again based on the enabling signal and the rotating speed control signal so as to improve the rotating speed. Here, there are at least three ways to control the fan to increase the rotation speed:
in a first possible manner, the fan is powered at a normal operating power, which refers to the output power of the fan when the air inlet is not blocked. Specifically, when the 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 working current of the fan, and the output power of the fan is unchanged. It will be appreciated that this way the state of operation prior to the power outage is restored and the blockage can be subsequently removed by performing the breathing process a number of times.
In a second possible manner, the power supply is performed with a preset restarting power, wherein the restarting 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 restarting power. In practical application, when the 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 to enable the suction force to be larger, and the blockage is eliminated. It will be appreciated that upon re-powering, the fan control unit automatically selects an upshift restart. Of course, the upshift restart may be manually selected, for example, by pressing a button to select the high gear speed after power is supplied.
In a third possible way, the fan speed may be increased by increasing the first speed threshold, in order 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 in the previous time. Based on the inherent mechanical characteristics of the blower, the blower speed increases with time, so that the greater the first speed threshold, the longer the power supply time, and the higher the blower speed, the greater the suction force. In this way, it is possible to choose to supply power at normal operating power or at a preset restart power.
And S3, if the air inlet is still blocked, the breathing process is circularly executed.
In practical application, the fan control unit detects the fan rotation speed in real time, and when the fan is powered again each time, if the fan rotation speed still reaches the first rotation speed threshold, it is indicated that the blockage does not fall or is not sucked into the dust collection barrel, and at this time, the breathing process needs to be repeatedly executed.
Further, the fan control unit is further configured to set a preset cycle number, and the control method further includes: and S4, if the cycle times of the breathing process reach the preset cycle times, the fan control unit controls the fan to be thoroughly powered off, namely the rotating speed of the fan is reduced to zero, and manual cleaning is performed. The preset cycle number can be set arbitrarily according to the actual requirement, for example, 4 times or 5 times.
It should be noted that, in each execution of the breathing process, only the parameter of the preset number of cycles of the breathing process may be changed, or one or more of the parameters of the preset restart power, the first preset threshold, the preset number of cycles, etc. may be changed to eliminate the blockage.
Finally, when the dust collector is detected to be blocked, the dust collector control method 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 repeatedly repeats the above processes continuously until the blockage is eliminated, so that the blockage is not required to be cleaned manually, and the dust collector control method is convenient to use; further improving the user experience.
Based on the dust collector control method provided by the embodiment, the embodiment of the application also provides a dust collector. Referring to fig. 5, the vacuum cleaner includes: the air intake 50, be used for producing suction and follow air intake 50 the fan 51 and fan control unit 52 of suction object, its characterized in that, fan control unit 52 is used for when detecting the air intake takes place to block up, carries out the breathing process, the breathing process includes: 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 still blocked, the breathing process is circularly executed.
In the embodiment of the present invention, the fan control unit 52 is preset with: the first rotational speed threshold is larger than the normal working rotational speed of the fan. In practical application, when the dust collector works, the motor drives the impeller to rotate, work is applied to air, and the air in the dust collection barrel is pumped out, so that the pressure difference is formed between the barrel and the atmospheric pressure, and objects around the air inlet are sucked into the dust collection barrel. When the air inlet is blocked, the air quantity in the dust collection barrel is reduced, the rotating speed of the fan is gradually increased from the normal working rotating speed until the air inlet is completely blocked by objects, the objects 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, and the rotating speed is highest. It should be noted that, the fan rotation speed and the suction force are in direct proportion, and in the process of gradually increasing the fan rotation speed, the suction force is also increasing, and the 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 working rotation speed of the fan, so that the accuracy of the control method can be improved, and the sudden suction condition can be avoided.
Further, the fan control unit 52 includes a detection circuit 520, a fan controller 521, and a motor driving circuit 522. The detection circuit 520 is configured to detect the fan speed and send the detected fan speed to the fan controller 521.
In a specific embodiment of the present invention, the method for detecting the fan speed by the detection circuit 520 is not limited, and the method for calculating the fan speed in the prior art can be referred to, and will not be described in detail herein. It should be noted that, in the embodiment of the present invention, the fan includes an impeller and a motor, and the rotation speed of the fan is that of the motor.
The fan controller 521 is configured to perform a respiration process when the fan rotation speed reaches the first rotation speed threshold, where the respiration process includes: the fan is controlled to reduce the rotating speed, and then the fan is controlled to increase the rotating speed.
In a specific embodiment of the present invention, when the air inlet is detected to be blocked, a respiration process is performed in order to remove the blockage. Specifically, the fan controller 521 is configured to: sending a speed reduction signal to the motor drive circuit 522 when the fan speed reaches the first speed threshold; the motor driving circuit 522 is configured to: receives the rotation speed reduction signal and reduces the supply current of the blower 51.
In practical applications, the rotation speed reducing signal includes situations such as zero input voltage or reduced output current. In the embodiment of the present invention, when the motor driving circuit 522 stops inputting the voltage to the fan, the fan rotation speed gradually decreases based on inertia, and may eventually decrease to zero, so as to achieve shutdown.
In the process of reducing the rotation speed of the fan, the rotation speed is smaller and smaller, and the suction force is smaller and smaller, so that the blockage can be dropped by reducing the rotation 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 power supply current of the fan to increase the rotation speed when the rotation speed of the fan decreases to a second rotation speed threshold, where the second rotation speed threshold is smaller than the normal operation rotation speed of the fan.
Specifically, when the fan controller 521 controls the fan speed to change from decreasing to increasing according to the second speed threshold, the detection circuit 520 needs to detect the fan speed in real time, and the detection principle is to continue referring to fig. 3, when the fan controller 521 controls the fan to be powered off, the A, B, C coils are not powered any more, and at this time, in the process of stopping the inertia of the rotor, a reverse 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 reverse electromotive force and the rotor position corresponding to any one of the three stators. The specific calculation method can be calculated by a method improved in the prior art, and will not be described in detail here.
The second rotational speed threshold may be zero, or may be slightly greater than zero and much less than the normal operating rotational speed when the fan is not plugged. If the second rotation speed threshold value is not zero, the second rotation speed threshold value is taken as an initial rotation speed and the rotation speed is gradually increased when the power is supplied to the fan again, and compared with the rotation speed which is increased from zero, the power supply time can be shortened, that is, the time required by the fan to increase the rotation speed can be reduced; further energy losses can be reduced.
In other possible implementations of the embodiment of the present invention, the fan controller 521 is further configured to: when the duration of the fan speed reduction reaches a preset time threshold, the motor driving circuit 522 is controlled to increase the fan power supply current to increase the fan speed.
In this implementation, the rotation speed is controlled by a preset time threshold, and the detection circuit 520 does not need to detect the rotation speed of the fan, but only needs to control the power supply to the fan 51 by the preset time threshold (0.5 seconds), that is, the fan 51 is powered again when the preset time threshold is reached after the fan is powered off. Preferably, the preset time threshold is less than the time required for the blower 51 to drop to zero from power off to rotational speed.
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, the main controller 53 outputs an enable signal and a rotation speed control signal to the fan controller 521 after receiving the fan abnormal signal, and the fan controller 521 controls the motor driving circuit 522 to supply power to the fan 51 and control 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 the specific embodiment 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 the 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 an upshift restart may be automatically set upon re-powering. Of course, the engine can be restarted by manual upshift, for example, after power is supplied, the high gear rotating speed is manually selected by a key.
In other embodiments, the fan controller 521 is configured to control the motor drive circuit 522 to supply power at the normal operating power of the fan. In particular, the input current of the blower is not changed under the condition of constant voltage when the power is supplied again, that is, the input is carried out with the normal working current before the power is cut off. It will be appreciated that this is to restore the state of operation prior to the power outage and that the blockage may be removed by performing the breathing process a number of times.
In other embodiments, the fan controller 521 may increase the fan speed by increasing the first speed threshold to thereby eliminate clogging. Specifically, each time the detection circuit 520 detects whether the air inlet is blocked, the first rotation speed threshold is reset, so that the current first rotation speed threshold is greater than the first rotation speed threshold set in the previous time. Based on the inherent mechanical characteristics of the blower, the blower speed increases with time, so that the greater the first speed threshold, the longer the power supply time, and the higher the blower speed, the greater the suction force. In this way, it is possible to choose to supply power at normal operating power or at a preset restart power.
Further, the fan controller 521 is further configured to: and if the air inlet is still blocked, the breathing process is circularly executed. Specifically, each time the fan controller 521 performs a breathing process (i.e., power is turned off-supplied for one cycle), the detection circuit 520 detects whether the fan rotation speed reaches the first rotation speed threshold, and if the fan rotation speed still reaches the first rotation speed threshold, it indicates that the blockage does not fall or is sucked into the dust collecting barrel, and at this time, the breathing process needs to be repeatedly performed.
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 respiration process reaches the preset cycle number, the fan 51 is controlled to be completely powered off, namely, the rotation speed of the fan is controlled to be reduced to zero, and then the blockage is manually cleaned. The preset cycle number can be set arbitrarily according to the actual requirement, for example, 4 times or 5 times.
It should be noted that, in each execution of the breathing process, only the parameter of the preset number of cycles of the breathing process may be changed, or one or more of the parameters of the preset restart power, the first preset threshold, the preset number of cycles, etc. may 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 repeatedly repeats the above processes continuously until the blockage is eliminated, so that the blockage can be automatically cleaned, and the dust collector is more convenient to use; further improving the user experience.
Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The system or the device disclosed in the embodiments are relatively simple in description, and the relevant points refer to the description of the method section because the system or the device corresponds to the method disclosed in the embodiments.
The above embodiments are merely for illustrating the technical solution of the present disclosure, and are not limiting thereof; 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (6)
1. A control method of a vacuum cleaner, wherein the vacuum cleaner includes an air inlet, a blower for generating a suction force and sucking an object from the air inlet, and a blower control unit, the control method comprising:
detecting the rotating speed of a fan; when the rotating speed of the fan reaches a first rotating speed threshold, the fan control unit judges that the air inlet is blocked, wherein the first rotating speed threshold is larger 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: firstly, controlling the fan to be powered off so as 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, and controlling the fan to restart so as to increase the rotating speed; resetting the first rotation speed threshold value so that the current first rotation speed threshold value is larger than the first rotation speed threshold value set in the previous time;
detecting the rotating speed of the fan again, and if the air inlet is still blocked, executing the breathing process circularly; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan;
and if the respiration process reaches the preset cycle times, the fan control unit controls the fan to be thoroughly powered off.
2. The method of claim 1, wherein controlling the fan to be de-energized to reduce the rotational speed and then controlling the fan to restart and increase the rotational speed further comprises:
when the power-off time of the fan is controlled to reach a preset time threshold, the fan is controlled to restart so as to increase the rotating speed of the fan.
3. The method of any one of claims 1 to 2, wherein the controlling the fan to restart to increase rotational speed comprises:
and controlling the output power of the fan to be increased to normal working power or preset restarting power, wherein the preset restarting power is larger than the normal working power of the fan.
4. A dust collector, wherein the dust collector comprises an air inlet, a fan for generating suction force and sucking sundries from the air inlet and a fan control unit, and is characterized in that,
the fan control unit is used for detecting the rotating speed of the fan; when the rotating speed of the fan reaches a first rotating speed threshold, the fan control unit judges that the air inlet is blocked, wherein the first rotating speed threshold is larger 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: firstly, controlling the fan to be powered off so as 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, and controlling the fan to restart so as to increase the rotating speed; simultaneously, before the fan control unit judges that the air inlet is blocked, resetting the first rotation speed threshold value so that the current first rotation speed threshold value is larger than the first rotation speed threshold value set in 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 still blocked, the breathing process is circularly executed; the second rotating speed threshold value is smaller than the normal working rotating speed of the fan;
and if the respiration process reaches the preset cycle times, the fan control unit controls the fan to be thoroughly powered off.
5. The vacuum cleaner of claim 4, wherein the blower control unit is further configured to:
when the power-off time of the fan is controlled to reach a preset time threshold, the fan is controlled to restart so as to increase the rotating speed of the fan.
6. The vacuum cleaner of any one of claims 4 to 5, wherein the blower control unit is further configured to:
and controlling the output power of the fan to be increased to normal working power or preset restarting power, wherein the preset restarting power is larger than the normal working power of the fan.
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| CN114794963B (en) * | 2020-08-27 | 2023-06-27 | 追觅创新科技(苏州)有限公司 | Hand-held dust collector |
| 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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| CN114305203A (en) | 2022-04-12 |
| CN111110108B (en) | 2022-01-11 |
| CN111110108A (en) | 2020-05-08 |
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