CN108742310B - Floor brush driving device of dust collector - Google Patents
Floor brush driving device of dust collector Download PDFInfo
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- CN108742310B CN108742310B CN201810868604.6A CN201810868604A CN108742310B CN 108742310 B CN108742310 B CN 108742310B CN 201810868604 A CN201810868604 A CN 201810868604A CN 108742310 B CN108742310 B CN 108742310B
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- resistor
- driving
- tube
- driving tube
- brush
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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
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0405—Driving means for the brushes or agitators
- A47L9/0411—Driving means for the brushes or agitators driven by electric motor
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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 floor brush driving device of a dust collector, which comprises: the first output end and the second output end are respectively connected with the ground brush; the PWM input end receives a PWM signal; the driving module is connected between the PWM input end and the first output end and the second output end, generates a driving signal according to the PWM signal and outputs the driving signal to the first output end and the second output end; and the detection module is connected with the first output end and/or the second output end and used for detecting the insertion state of the ground brush. The floor brush driving device of the dust collector has the characteristics of low power consumption, low cost, simple assembly, less wire harness and safety.
Description
Technical Field
The invention relates to the technical field of intelligent control, in particular to a floor brush driving device of a dust collector.
Background
The floor brush control technology of the dust collector mainly comprises a floor brush plug-in technology which is not detected and an upper interface feedback technology of a floor brush module.
The implementation mode of the technology of not detecting the ground brush plug is that a ground brush control circuit is opened after the power-on, and a pulse width modulation (Pulse Width Modulation, PWM for short) signal for controlling the voltage of the brush is output. The PWM always exists no matter the ground brush is pulled out or inserted, so the ground brush plug-in terminal always has high voltage without detecting the ground brush plug-in technology, the ground brush is unsafe, and the power consumption of the circuit board is large.
The implementation mode of the interface feedback technology on the floor brush module is that besides two control ports of the floor brush, an interface is additionally arranged, and the floor brush module feeds back whether the floor brush exists for the main control system of the dust collector or not through the interface, so that the interface feedback technology on the floor brush module needs to be provided with a feedback interface, wiring harnesses are increased, assembly is complex, and cost is high.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the invention aims to provide a floor brush driving device of a dust collector, which can ensure that the floor brush driving device has the characteristics of low power consumption, low cost, simple assembly, less wire harness and safety.
To achieve the above object, an embodiment of the present invention provides a floor brush driving apparatus of a dust collector, comprising:
the first output end and the second output end are connected with the ground brush;
the PWM input end is used for receiving PWM signals;
the driving module is connected between the PWM input end and the first output end and the second output end, and is used for generating a driving signal according to the PWM signal and outputting the driving signal to the first output end and the second output end;
And the detection module is connected with the first output end and/or the second output end and is used for detecting the insertion state of the ground brush.
According to the ground brush driving device of the dust collector, the PWM input end receives the PWM signal, the driving module between the first output end and the second output end generates the driving signal according to the PWM signal and outputs the driving signal to the first output end and the second output end, and the detection module connected with the first output end and/or the second output end completes the detection of the ground brush insertion state, so that when the fact that the ground brush is not inserted (i.e. pulled out) is detected, the PWM signal is closed, and the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, so that the ground brush driving device is safe, low in power consumption of a circuit board, and low in wiring harness, and a feedback interface is not required to be added.
According to one embodiment of the invention, the driving module comprises: the first switch tube is connected with the second output end and is used for controlling the on-off of a grounding loop of the second output end; a first stage drive sub-module connected to the PWM input; and the output end of the second-stage driving sub-module is connected with the control end of the first switching tube.
According to one embodiment of the invention, the first stage drive sub-module comprises: the first end of the first resistor is connected with the PWM input end; the first end of the second resistor is connected with a power supply; the first end of the first driving tube is connected with the second end of the second resistor, the second end of the first driving tube is grounded, the control end of the first driving tube is connected with the second end of the first resistor, and the second end of the second resistor is the output end of the first-stage driving sub-module.
According to one embodiment of the invention, the second stage drive sub-module comprises: the first end of the third resistor is connected with the power supply; the control end of the second driving tube is connected with the output end of the first-stage driving sub-module, the first end of the second driving tube is connected with the second end of the third resistor, and the second end of the second driving tube is grounded; the first end of the fourth resistor is connected with the power supply; the control end of the third driving tube is connected with the second end of the third resistor, and the first end of the third driving tube is connected with the second end of the fourth resistor; the control end of the fourth driving tube is connected with the second end of the third resistor, the first end of the fourth driving tube is connected with the second end of the third driving tube, and the second end of the fourth driving tube is grounded; and the first end of the fifth resistor is connected with the second end of the third driving tube and the first end of the fourth driving tube, and the second end of the fifth resistor is connected with the control end of the first switching tube.
According to an embodiment of the present invention, the ground brush driving apparatus further includes: and a first diode connected between the first output terminal and the second output terminal.
According to an embodiment of the present invention, the ground brush driving apparatus further includes: and the enabling module is used for receiving the enabling signal and controlling the detection module according to the enabling signal.
According to one embodiment of the invention, the detection module comprises: the anode of the second diode is connected with the second output end; a first end of the fifth driving tube is connected with the cathode of the second diode, and a control end of the fifth driving tube is connected with the enabling module; the first end of the sixth resistor is connected with a power supply; a seventh resistor, wherein the first end of the seventh resistor is connected with the second end of the fifth driving tube; and the control end of the sixth driving tube is connected with the second end of the seventh resistor, the first end of the sixth driving tube is connected with the second end of the sixth resistor, and the second end of the sixth driving tube is grounded, wherein the first end of the sixth driving tube is a ground brush insertion state detection end.
According to one embodiment of the invention, the enabling module comprises: an eighth resistor, wherein a first end of the eighth resistor is connected with the enabling signal; and the control end of the seventh driving tube is connected with the second end of the eighth resistor, the first end of the seventh driving tube is the output end of the enabling module, and the second end of the seventh driving tube is grounded.
According to one embodiment of the invention, the driving module comprises: the second switch tube is connected with the second output end; a first stage driver connected to the PWM input; a second stage driver connected to an output of the first stage driver; and the output end of the third-stage driver is connected with the control end of the second switching tube.
According to one embodiment of the invention, the first stage driver comprises: a ninth resistor, wherein a first end of the ninth resistor is connected with the power supply; a tenth resistor, wherein a first end of the tenth resistor is connected with the PWM input end; the control end of the eighth driving tube is connected with the second end of the tenth resistor, and the first end of the eighth driving tube is connected with the second end of the ninth resistor; and the first end of the eleventh resistor is connected with the second end of the eighth driving tube, and the second end of the eleventh resistor is grounded, wherein the first end of the eleventh resistor is the output end of the first-stage driver.
According to one embodiment of the invention, the second stage driver comprises: a twelfth resistor, a first end of which is connected with the power supply; a thirteenth resistor, a first end of the thirteenth resistor being connected to a second end of the twelfth resistor; a control end of the ninth driving tube is connected with the output end of the first stage driver, a first end of the ninth driving tube is connected with the second end of the thirteenth resistor, and a second end of the ninth driving tube is grounded; a tenth driving tube, wherein the control end of the tenth driving tube is connected with the second end of the twelfth resistor, the first end of the tenth driving tube is connected with the power supply, the fourteenth resistor, and the first end of the fourteenth resistor is connected with the second end of the tenth driving tube; and the first end of the fifteenth resistor is connected with the second end of the fourteenth resistor, and the second end of the fifteenth resistor is grounded, wherein the second end of the fourteenth resistor is the output end of the second-stage driver.
According to one embodiment of the present invention, the third stage driver includes: the anode of the third diode is connected with the output end of the second-stage driver; an eleventh driving tube, the control end of the eleventh driving tube is connected with the output end of the second stage driver, the first end of the eleventh driving tube is connected with the cathode of the third diode, and the second end of the eleventh driving tube is grounded; and the first end of the sixteenth resistor is connected with the cathode of the third diode, and the second end of the sixteenth resistor is grounded, wherein the cathode of the third diode is connected with the control end of the second switching tube and the output end of the third stage driver.
According to an embodiment of the present invention, the ground brush driving apparatus further includes: and a fourth diode connected between the first output terminal and the second output terminal.
According to one embodiment of the invention, the detection module comprises: the first sampling resistor is used for detecting the current of the second switching tube and generating sampling current; and the first operational amplifier is connected with the first sampling resistor and is used for amplifying the sampling current, wherein a ground brush insertion state detection result is generated according to the sampling current.
According to one embodiment of the invention, the detection module further comprises: and the first filter is connected with the first operational amplifier and is used for filtering the amplified sampling current.
According to one embodiment of the invention, the driving module comprises: the third switching tube is connected with the first output end; a seventeenth resistor, wherein a first end of the seventeenth resistor is connected with the PWM input end; an eighteenth resistor, a first end of the eighteenth resistor being connected to the power supply, a second end of the eighteenth resistor being connected to a second end of the seventeenth resistor; a twelfth drive tube, wherein the control end of the twelfth drive tube is connected with the second end of the seventeenth resistor; a twentieth resistor, a first end of the twentieth resistor being connected to the power supply; a twenty-first resistor, a first end of the twenty-first resistor being connected to the power supply; a thirteenth drive tube, the control end of the thirteenth drive tube being connected to the second end of the twentieth resistor, the first end of the thirteenth drive tube being connected to the second end of the twenty-first resistor; a fourteenth driving tube, wherein the control end of the fourteenth driving tube is connected with the second end of the twentieth resistor, the first end of the fourteenth driving tube is connected with the second end of the thirteenth driving tube, and the second end of the fourteenth driving tube is grounded; and the first end of the twenty-second resistor is connected with the second end of the thirteenth driving tube, and the second end of the twenty-second resistor is connected with the control end of the third switching tube.
According to one embodiment of the invention, the detection module comprises: the first detection sub-module is connected with the first output end and is used for generating a first detection result; the second detection sub-module is connected with the second output end and is used for generating a second detection result; and the decision sub-module is used for generating a ground brush insertion state detection result according to the first detection result and the second detection result.
According to an embodiment of the present invention, the ground brush driving apparatus further includes: and a fifth diode connected between the first output terminal and the second output terminal.
According to one embodiment of the invention, the first detection submodule comprises: a sixth diode, wherein the cathode of the sixth diode is connected with the first output end; a twenty-third resistor, wherein a first end of the twenty-third resistor is connected with the power supply; a twenty-fourth resistor, the first end of the twenty-fourth resistor being connected to the second end of the twenty-third resistor; a twenty-fifth resistor, wherein a first end of the twenty-fifth resistor is connected with a second end of the twenty-fourth resistor, and a second end of the twenty-fifth resistor is grounded; a twenty-sixth resistor, a first end of the twenty-sixth resistor being connected to the power supply; and the control end of the fifteenth driving tube is connected with the second end of the twenty-fourth resistor, the first end of the fifteenth driving tube is connected with the second end of the twenty-sixth resistor, and the second end of the fifteenth driving tube is grounded, wherein the second end of the twenty-sixth resistor is the output end of the first detection submodule.
According to one embodiment of the invention, the second detection submodule comprises: the second sampling resistor is used for detecting the current of the third switching tube and generating sampling current; and the second operational amplifier is connected with the second sampling resistor and is used for amplifying the sampling current, wherein the second detection result is generated according to the sampling current.
According to one embodiment of the invention, the second detection sub-module further comprises: and the second filter is connected with the second operational amplifier and is used for filtering the amplified sampling current.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view of a structure of a floor brush driving apparatus of a cleaner according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a floor brush driving apparatus of a dust collector according to another embodiment of the present invention;
FIG. 3 is a flowchart of a floor brush control method based on the floor brush driving apparatus of the vacuum cleaner shown in FIG. 2;
fig. 4 is a circuit diagram of a floor brush driving apparatus of a dust collector according to another embodiment of the present invention;
FIG. 5 is a flowchart of a floor brush control method based on the floor brush driving apparatus of the vacuum cleaner shown in FIG. 4;
fig. 6 is a circuit diagram of a floor brush driving apparatus of a dust collector according to another embodiment of the present invention;
fig. 7 is a flowchart of a floor brush control method based on the floor brush driving apparatus of the vacuum cleaner shown in fig. 6.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The floor brush driving apparatus of a dust collector according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic view of a structure of a floor brush driving apparatus of a cleaner according to an embodiment of the present invention. As shown in fig. 1, a floor brush driving apparatus of a dust collector according to an embodiment of the present invention includes:
the first output end 11 and the second output end 12, and the first output end 11 and the second output end 12 are connected with the ground brush.
A PWM input 13 for receiving a PWM signal.
The driving module 14 is connected between the PWM input terminal 13 and the first output terminal 11 and the second output terminal 12, and is configured to generate a driving signal according to the PWM signal and output the driving signal to the first output terminal 11 and the second output terminal 12.
The detection module 15, the detection module 15 is connected with the first output end 11 and/or the second output end 12, and is used for detecting the insertion state of the floor brush.
According to the ground brush driving device of the dust collector, the PWM input end receives the PWM signal, the driving module between the first output end and the second output end generates the driving signal according to the PWM signal and outputs the driving signal to the first output end and the second output end, and the detection module connected with the first output end and/or the second output end completes the detection of the ground brush insertion state, so that when the fact that the ground brush is not inserted (i.e. pulled out) is detected, the PWM signal is closed, and the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, so that the ground brush driving device is safe, low in power consumption of a circuit board, and low in wiring harness, and a feedback interface is not required to be added.
Fig. 2 is a circuit diagram of a floor brush driving apparatus of a dust collector according to another embodiment of the present invention. As shown in FIG. 2, in
The drive module 14, which is a basis for the embodiment shown in fig. 1, comprises: the first switch tube Q4 is connected with the second output end Brush- (corresponding to the second output end 12 in FIG. 1), and the first switch tube Q4 is used for controlling the on-off of a grounding loop of the second output end Brush-; a first stage drive sub-module connected to a PWM input PWM Brush (corresponding to PWM input 13 in fig. 1); and the output end of the second-stage driving sub-module is connected with the control end of the first switching tube Q4.
Wherein the first stage drive sub-module comprises: the first end of the first resistor R14 is connected with the PWM input end PWM Brush; the first end of the second resistor R11 is connected with the power supply VCC; the first end of the first driving tube Q8 is connected with the second end of the second resistor R11, the second end of the first driving tube Q8 is grounded, the control end of the first driving tube Q8 is connected with the second end of the first resistor R14, and the second end of the second resistor R14 is the output end of the first-stage driving sub-module.
Wherein the second stage drive sub-module comprises: the first end of the third resistor R1 is connected with the power supply VCC; the control end of the second driving tube Q7 is connected with the output end of the first-stage driving sub-module, the first end of the second driving tube Q7 is connected with the second end of the third resistor R1, and the second end of the second driving tube Q7 is grounded; the first end of the fourth resistor R2 is connected with the power supply VCC; the control end of the third driving tube Q2 is connected with the second end of the third resistor R1, and the first end of the third driving tube Q2 is connected with the second end of the fourth resistor R2; the control end of the fourth driving tube Q5 is connected with the second end of the third resistor R1, the first end of the fourth driving tube Q5 is connected with the second end of the third driving tube Q2, and the second end of the fourth driving tube Q5 is grounded; and a first end of the fifth resistor R6 is connected with the second end of the third driving tube Q2 and the first end of the fourth driving tube Q5, and a second end of the fifth resistor R6 is connected with the control end of the first switching tube Q4.
The ground brush driving device of the embodiment of the invention further comprises: a first diode D1 connected between the first output terminal brush+ and the second output terminal Brush-.
The ground brush driving device of the embodiment of the invention further comprises: and the enabling module is used for receiving the enabling signal and controlling the detection module according to the enabling signal.
Wherein the detection module 15 comprises: the anode of the second diode D2 is connected with the second output end Brush; a first end of the fifth driving tube Q1 is connected with the cathode of the second diode D2, and a control end of the fifth driving tube Q1 is connected with the enabling module; a sixth resistor R3, wherein a first end of the sixth resistor R3 is connected with the power supply VDD; a seventh resistor R5, wherein a first end of the seventh resistor R5 is connected to a second end of the fifth driving tube Q1; and a control end of the sixth driving tube Q3 is connected with a second end of the seventh resistor R5, a first end of the sixth driving tube Q3 is connected with a second end of the sixth resistor R3, and a second end of the sixth driving tube Q3 is grounded, wherein the first end of the sixth driving tube Q3 is a ground Brush insertion state detection end Brush detection end.
Wherein the enabling module comprises: an eighth resistor R12, wherein a first end of the eighth resistor R12 is connected to the ENABLE signal Brush ENABLE; and a control end of the seventh driving tube Q6 is connected with a second end of the eighth resistor R12, a first end of the seventh driving tube Q6 is an output end of the enabling module, and a second end of the seventh driving tube Q6 is grounded.
Wherein VBAT is the battery voltage and GND is ground.
The operating principle of the floor brush driving apparatus of the vacuum cleaner of the embodiment shown in fig. 2 is shown in table 1: when PWMBrush is high, the first driving transistor Q8 is turned on, the second driving transistor Q7 is turned off, the fourth driving transistor Q5 is turned off, and the third driving transistor Q2 is turned on, so the first switching transistor Q4 is turned on. When PWMBrush is low, the first driving transistor Q8 is not turned on, the second driving transistor Q7 is turned on, the fourth driving transistor Q5 is turned on, and the third driving transistor Q2 is not turned on, so the first switching transistor Q4 is not turned on.
After the local Brush is inserted, the resistance between the brush+ and the Brush-is small and is equivalent to a passage. When the Brush is not inserted (i.e., pulled out), there is a break between brush+ and Brush-.
Therefore, when PWMBrush is high after the ground Brush is inserted, the anode of the second diode D2 is low, the fifth driving transistor Q1 is not turned on, and the sixth driving transistor Q3 is not turned on, so that the Brush Detect is high.
When the Brush is inserted and PWMBrush is low, the anode of the second diode D2 is high, the fifth driving transistor Q1 is turned on, and the sixth driving transistor Q3 is turned on, so the Brush Detect is low.
When the Brush is not inserted (i.e., pulled out) and PWMBrush is high, the anode of the second diode D2 is low, the fifth driving transistor Q1 is non-conductive, and the sixth driving transistor Q3 is non-conductive, so the Brush Detect is high.
When the Brush is not inserted (i.e., pulled out) and PWMBrush is low, the anode of the second diode D2 is low, the fifth drive tube Q1 is non-conductive, and the sixth drive tube Q3 is non-conductive, so the Brush Detect is high.
When power is supplied, the Brush ENABLE is set to be at a high level, and the seventh driving tube Q6 is turned on, so that the detection module 15 is ensured to operate.
Table 1 working principle of ground brush driving device of dust collector
Based on the working principle, the detection of the ground brush insertion state can be realized, and when the ground brush extraction is detected, the PWM signal is closed, namely the PWM signal is low level, so that the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, and the dust collector is safe and low in power consumption of a circuit board.
Fig. 3 is a flowchart of a floor brush control method based on the floor brush driving apparatus of the cleaner shown in fig. 2. As shown in fig. 3, the floor brush control method includes:
s101: the discharge is started.
S102: and outputting a ground Brush PWM signal (PWM Brush has control pulse).
S103: and (5) entering a ground brush pulling-out detection state.
S104: it is determined whether the Brush Detect is pulsed off for X seconds.
If not, returning to S103 to reenter the ground brush pulling detection state; if yes, the process proceeds to step S105.
S105: the result of the judgment is that the ground Brush is pulled out, and the ground Brush PWM signal (PWM Brush is low level) is turned off.
S106: and entering a ground brush access detection state.
S107: it is determined whether the flush Detect is low for X seconds.
If not, returning to S106 to enter a ground brush access detection state; if yes, the process proceeds to step S108.
S108: and returning to S102 to output a ground Brush PWM signal (PWM Brush has control pulse) after the ground Brush is inserted.
According to the ground brush driving device of the dust collector, the PWM input end receives the PWM signal, the driving module between the first output end and the second output end generates the driving signal according to the PWM signal and outputs the driving signal to the first output end and the second output end, and the detection module connected with the second output end completes detection of the ground brush insertion state, so that when the fact that the ground brush is not inserted (namely pulled out) is detected, the PWM signal can be closed, namely the PWM signal is low level, the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, and therefore the ground brush driving device is safe, low in circuit board power consumption, and low in wire harness, and a feedback interface is not required to be added.
Fig. 4 is a circuit diagram of a floor brush driving apparatus of a dust collector according to another embodiment of the present invention. As shown in fig. 4, on the basis of the embodiment shown in fig. 1, the driving module 14 includes: a second switching tube Q10 connected to the second output terminal MI- (corresponding to the second output terminal 12 in fig. 2); a first stage driver connected to the PWM input BRUSH PWM (corresponding to the first output 12 in fig. 1); a second stage driver connected to the output of the first stage driver; and the output end of the third-stage driver is connected with the control end of the second switching tube Q10.
Wherein the first stage driver comprises: a ninth resistor R21, wherein a first end of the ninth resistor R21 is connected to the power supply VCC; a tenth resistor R23, wherein a first end of the tenth resistor R23 is connected with a PWM input end BRUSH PWM; an eighth driving tube Q11, the control end of the eighth driving tube Q11 is connected to the second end of the tenth resistor R23, and the first end of the eighth driving tube Q11 is connected to the second end of the ninth resistor R21; an eleventh resistor R33, wherein a first end of the eleventh resistor R33 is connected to the second end of the eighth driving tube Q11, and a second end of the eleventh resistor R33 is grounded, and the first end of the eleventh resistor R33 is an output end of the first stage driver.
Wherein the second stage driver comprises: a twelfth resistor R18, a first end of the twelfth resistor R18 being connected to the power supply VDD; a thirteenth resistor R20, a first end of the thirteenth resistor R20 being connected to a second end of the twelfth resistor R18; a control end of the ninth driving tube Q12 is connected to the output end of the first stage driver, a first end of the ninth driving tube Q12 is connected to the second end of the thirteenth resistor R20, and a second end of the ninth driving tube Q12 is grounded; a tenth driving tube Q9, a control end of the tenth driving tube Q9 is connected to a second end of the twelfth resistor R18, and a first end of the tenth driving tube Q9 is connected to the power supply VDD; a fourteenth resistor Q22, a first end of the fourteenth resistor Q22 being connected to a second end of the tenth driving tube Q9; and a fifteenth resistor R26, wherein a first end of the fifteenth resistor R26 is connected with a second end of the fourteenth resistor R22, and a second end of the fifteenth resistor is grounded, wherein the second end of the fourteenth resistor R22 is an output end of the second-stage driver.
Wherein the third stage driver comprises: a third diode D8, wherein the anode of the third diode D8 is connected with the output end of the second-stage driver; an eleventh driving tube Q13, a control end of the eleventh driving tube Q13 is connected to an output end of the second stage driver, a first end of the eleventh driving tube Q13 is connected to a cathode of the third diode D8, and a second end of the eleventh driving tube Q13 is grounded; and a first end of the sixteenth resistor Q25 is connected with a cathode of the third diode D8, and a second end of the sixteenth resistor R25 is grounded, wherein the cathode of the third diode D8 is an output end of the third-stage driver and is connected with a control end of the second switching tube Q10.
The ground brush driving device of the embodiment of the invention further comprises: a fourth diode D7 connected between the first output mi+ and the second output MI-.
Wherein the detection module 15 comprises: the first sampling resistor R27 is used for detecting the current of the second switching tube Q10 and generating a sampling current; the first operational amplifier U4A is connected with the first sampling resistor R27 and is used for amplifying the sampling current, wherein a ground Brush insertion state detection result is generated according to the sampling current Brush_I.
Wherein the detection module 15 further comprises: the first filter (including an RC filter formed by a resistor R75 and a capacitor C27) is connected to the first operational amplifier U4A, and is used for filtering the amplified sampling current.
Wherein BATT+ is battery voltage, GND is ground, and J4 is a brush motor module.
The working principle of the ground brush driving device of the embodiment shown in fig. 4 is shown in table 2: when the BRUSH PWM is at the high level, the eighth driving transistor Q11 is turned off, the ninth driving transistor Q12 is turned off, the tenth driving transistor Q9 is turned off, and the eleventh driving transistor Q13 is turned off, so that the second switching transistor Q10 is turned off. When the BRUSH PWM is at the low level, the eighth driving transistor Q11 is turned on, the ninth driving transistor Q12 is turned on, the tenth driving transistor Q9 is turned on, and the eleventh driving transistor Q13 is turned on, so the second switching transistor Q10 is turned on.
After the brush is inserted, the resistance between MI+ and MI-is very small, which is equivalent to the path. When the brush is not inserted (i.e., pulled out), the MI+ and MI-are open.
Therefore, after the local BRUSH is inserted, and when the BRUSH PWM is at a high level, the second switching tube Q10 is not conducted, the first sampling resistor R27 cannot detect the current of the second switching tube Q10 and generate a sampling current, and no effective working current exists at the BRUSH_I end.
When the BRUSH is inserted and BRUSH PWM is at a low level, the second switch tube Q10 is conducted, the first sampling resistor R27 detects the current of the second switch tube Q10 and generates sampling current, the sampling current is amplified by a plurality of times through the first operational amplifier and then filtered through the first filter, and the BRUSH_I end outputs stable and effective working current after amplification.
When the BRUSH is not inserted (i.e. pulled out), the MI+ and MI-are disconnected, and when BRUSH PWM is high level or low level, the first sampling resistor R27 can not detect the current of the second switching tube Q10 and generate sampling current, and the BRUSH_I end has no effective working current.
Table 2 working principle of ground brush driving device of dust collector
Based on the working principle, the detection of the ground brush insertion state can be realized, and when the ground brush extraction is detected, the PWM signal is closed, namely the PWM signal is high level, so that the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, and the dust collector is safe and low in power consumption of a circuit board. In addition, after the ground brush is detected to be pulled out and the PWM signal is closed, the PWM signal with certain low duty ratio can be opened at regular time, so that the two ends of the ground brush have very low voltage, at the moment, the ground brush motor does not move, and the ground brush plug terminal has very low current. Therefore, the ground brush plug terminal has small weak current at an irregular time, so that the ground brush plug terminal is safe and low in power consumption of a circuit board.
Fig. 5 is a flowchart of a floor brush control method based on the floor brush driving apparatus of the vacuum cleaner shown in fig. 4.
As shown in fig. 5, the floor brush control method includes:
s201: the discharge is started.
S202: and outputting a ground BRUSH PWM signal (BRUSH PWM has control pulse).
S203: constant current closed loop control or non-closed loop control.
S204: and (5) entering a ground brush pulling-out detection state.
S205: it is determined whether BRUSH_I has no active operating current output for X seconds.
If not, returning to S204 to reenter the ground brush pulling detection state; if yes, go to step 206.
S206: the BRUSH is pulled out as a result of the judgment, and the BRUSH PWM signal (brosh PWM is high) is turned off.
S207: and entering a ground brush access detection state.
S208: and the timing BRUSH PWM is A, the voltage at two ends of the ground BRUSH is B, and the ground BRUSH motor is motionless.
S209: it is determined whether BRUSH I has current Ia for X seconds.
If not, returning to S207 to reenter the ground brush access detection state; if yes, the process proceeds to step S210.
S210: and returning to S202 to output a ground BRUSH PWM signal (BRUSH PWM has control pulse) after the ground BRUSH is inserted as a result of judgment.
According to the ground brush driving device of the dust collector, the PWM input end receives the PWM signal, the driving module between the first output end and the second output end generates the driving signal according to the PWM signal and outputs the driving signal to the first output end and the second output end, and the detection module connected with the second switch tube completes detection of the ground brush insertion state, so that when the fact that the ground brush is not inserted (namely pulled out) is detected, the PWM signal can be closed, namely the PWM signal is high level, the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, and therefore the ground brush driving device is safe, low in circuit board power consumption, and low in wire harness, and a feedback interface is not required to be added.
Fig. 6 is a circuit diagram of a floor brush driving apparatus of a dust collector according to another embodiment of the present invention. As shown in fig. 6, on the basis of the embodiment shown in fig. 1, the driving module 14 includes: the third switching tube Q2 is connected with the first output end BR+; a seventeenth resistor R11, wherein a first end of the seventeenth resistor R11 is connected to a PWM input terminal PWM bussh (corresponding to the PWM input terminal 13 in fig. 1); an eighteenth resistor R8, a first end of the eighteenth resistor R8 is connected to the power supply VDD, and a second end of the eighteenth resistor R8 is connected to a second end of the seventeenth resistor R11; a twelfth driving tube Q5, the control end of the twelfth driving tube Q5 being connected to the second end of the seventeenth resistor R11; the first end of the twentieth resistor R1 is connected with the power supply VCC; a twenty-first resistor R2, wherein a first end of the twenty-first resistor R2 is connected with a power supply VCC; a thirteenth driving tube Q1, the control end of the thirteenth driving tube Q1 is connected to the second end of the twentieth resistor R1, and the first end of the thirteenth driving tube Q1 is connected to the second end of the twenty-first resistor R2; a fourteenth driving tube Q4, the control end of the fourteenth driving tube Q4 is connected to the second end of the twentieth resistor R1, the first end of the fourteenth driving tube Q4 is connected to the second end of the thirteenth driving tube Q1, and the second end of the fourteenth driving tube Q4 is grounded; the first end of the twenty-second resistor R6 is connected with the second end of the thirteenth driving tube Q1, and the second end of the twenty-second resistor R6 is connected with the control end of the third switching tube Q2.
The detection module 15 according to the embodiment of the present invention includes: the first detection sub-module is connected with the first output end and is used for generating a first detection result Brush detection; the second detection sub-module is connected with the second output end and is used for generating a second detection result Brush_I; and the decision sub-module is used for generating a ground Brush insertion state detection result according to the first detection result Brush detect and the second detection result brush_I.
The ground brush driving device of the embodiment of the invention further comprises: a fourth diode D2 connected between the first output br+ (corresponding to the first output 11 in fig. 1) and the second output BR- (corresponding to the second output 12 in fig. 1).
Wherein the first detection submodule includes: the cathode of the fifth diode D1 is connected with the first output end; a twenty-third resistor R3, wherein a first end of the twenty-third resistor R3 is connected with a power supply VDD; a twenty-fourth resistor R5, wherein a first end of the twenty-fourth resistor R5 is connected with a second end of the twenty-third resistor R3; a twenty-fifth resistor R7, wherein a first end of the twenty-fifth resistor R7 is connected with a second end of the twenty-fourth resistor R5, and a second end of the twenty-fifth resistor R7 is grounded; a twenty-sixth resistor R4, wherein a first end of the twenty-sixth resistor is connected with the power supply VDD; the control end of the fifteenth driving tube Q3 is connected with the second end of the twenty-fourth resistor R5, the first end of the fifteenth driving tube Q3 is connected with the second end of the twenty-sixth resistor R4, and the second end of the fifteenth driving tube Q3 is grounded, wherein the second end of the twenty-sixth resistor R4 is the output end BRUSH detection of the first detection submodule.
Wherein the second detection sub-module comprises: the second sampling resistor R16 is used for detecting the current of the third switching tube Q2 and generating a sampling current; the second operational amplifier U1A is connected to the second sampling resistor R16, and is configured to amplify the sampling current, where the second detection result brush_i is generated according to the sampling current brush_i.
Wherein the second detection sub-module further comprises: and the second filter (comprising an RC filter formed by a resistor R14 and a capacitor C3) is connected with the second operational amplifier U1A and is used for filtering the amplified sampling current.
Wherein vbat+ is battery voltage, GND is ground, and J1 is a brush motor module.
The operating principle of the floor brush driving apparatus of the vacuum cleaner of the embodiment shown in fig. 6 is shown in table 3: when PWM brosh is at a high level, the twelfth driving transistor Q5 is turned on, the thirteenth driving transistor Q1 is turned off, and the fourteenth driving transistor Q4 is turned on, so the third switching transistor Q2 is turned off. When PWM brosh is low, the twelfth driving transistor Q5 is not turned on, the thirteenth driving transistor Q1 is turned on, and the fourteenth driving transistor Q4 is not turned on, so the third switching transistor Q2 is turned on.
After the local brush is inserted, the resistance between BR+ and BR-is very small, which is equivalent to the passage. When the brush is not inserted (i.e., pulled out), the BR+ and BR-are disconnected.
Therefore, after the local BRUSH is inserted, when the PWM BRUSH is at a high level, Q2 is not turned on, Q3 is not turned on, BRUSHDetect is at a high level, and only a small current flows through the second sampling resistor R16, so that the amplified brush_i end obtains a small current; when PWM_BRUSH is low level, Q2 is conducted, Q3 is conducted, BRUSH detection is low level, working current is generated through a second sampling resistor R16, sampling current is amplified by a plurality of times through an operational amplifier U1A, then filtering is carried out through a filter, and stable large current is obtained through the BRUSH_I end after amplification.
When the BRUSH is not inserted (i.e. pulled out) and PWM BRUSH is high level or low level, the fifteenth driving tube Q3 is conducted, and BRUSH detection is low level; only tiny current passes through the second sampling resistor R16, the sampling current is amplified through the second operational amplifier U1A, and then filtered through the second filter, and the stable tiny current is obtained at the BRUSH_I end.
Table 3 working principle of floor brush driving device of dust collector
Based on the above working principle, the ground BRUSH insertion state is detected according to the second detection result BRUSH_I, and when the ground BRUSH is detected to be pulled out, whether the ground BRUSH is inserted is detected according to the first detection result Brush Detect, so that the detection of the ground BRUSH insertion state is realized, and when the ground BRUSH is detected to be pulled out, the PWM signal is turned off, namely, the PWM signal is high level, so that the ground BRUSH insertion terminal of the ground BRUSH driving device of the dust collector does not continuously carry high voltage, and therefore the dust collector is safe and has low circuit board power consumption.
Fig. 7 is a flowchart of a floor brush control method based on the floor brush driving apparatus of the vacuum cleaner shown in fig. 6.
As shown in fig. 7, the floor brush control method includes:
s301: the discharge is started.
S302: and outputting a ground BRUSH PWM signal (PWM BRUSH has control pulse).
S303: and (5) entering a ground brush pulling-out detection state.
S304: it is determined whether the BRUSH current signal BRUSH_I lasts for X seconds less than A.
If not, returning to S303 to enter a ground brush pulling-out detection state; if yes, the process proceeds to step S305.
S305: the result of the judgment is that the BRUSH is pulled out, and the BRUSH PWM signal (PWM BRUSH is high level) is turned off.
S306: and entering a ground brush access detection state.
S307: it is determined whether BRUSH Detector is high for X seconds.
If not, returning to S306 to reenter the ground brush access detection state; if yes, the process proceeds to step S308.
S308: and returning to S302 to output a ground BRUSH PWM signal (PWM BRUSH has control pulse) after the ground BRUSH is inserted as a result of judgment.
According to the ground brush driving device provided by the embodiment of the invention, the PWM input end receives the PWM signal, the driving module between the first output end and the second output end generates the driving signal according to the PWM signal and outputs the driving signal to the first output end and the second output end, and the detection module connected with the first output end and the second output end completes the detection of the ground brush insertion state, so that when the fact that the ground brush is not inserted (i.e. pulled out) is detected, the PWM signal can be closed, namely the PWM signal is high level, so that the ground brush insertion terminal of the ground brush driving device of the dust collector does not continuously carry high voltage, the ground brush driving device is safe, the power consumption of a circuit board is low, a feedback interface is not required to be added, and the ground brush driving device is simple in design, easy to assemble, low in cost and few in wire harness.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (21)
1. A floor brush driving apparatus of a vacuum cleaner, comprising:
the first output end and the second output end are connected with the ground brush;
the PWM input end is used for receiving PWM signals;
the driving module is connected between the PWM input end and the first output end and the second output end and is used for generating a driving signal according to the PWM signal and outputting the driving signal to the first output end and the second output end, and the detection module connected with the second output end is used for detecting the inserting state of the ground brush and closing the PWM signal when detecting that the ground brush is not inserted;
and the detection module is connected with the first output end and/or the second output end and is used for detecting the insertion state of the ground brush.
2. The floor brush driving apparatus of a vacuum cleaner according to claim 1, wherein the driving module comprises:
The first switch tube is connected with the second output end and is used for controlling the on-off of a grounding loop of the second output end;
a first stage drive sub-module connected to the PWM input;
and the output end of the second-stage driving sub-module is connected with the control end of the first switching tube.
3. The floor brush driving apparatus of a vacuum cleaner of claim 2, wherein the first stage driving sub-module comprises:
the first end of the first resistor is connected with the PWM input end;
the first end of the second resistor is connected with a power supply;
the first end of the first driving tube is connected with the second end of the second resistor, the second end of the first driving tube is grounded, the control end of the first driving tube is connected with the second end of the first resistor, and the second end of the second resistor is the output end of the first-stage driving sub-module.
4. The floor brush driving apparatus of a vacuum cleaner of claim 2, wherein the second stage driving sub-module comprises:
the first end of the third resistor is connected with a power supply;
The control end of the second driving tube is connected with the output end of the first-stage driving sub-module, the first end of the second driving tube is connected with the second end of the third resistor, and the second end of the second driving tube is grounded;
the first end of the fourth resistor is connected with the power supply;
the control end of the third driving tube is connected with the second end of the third resistor, and the first end of the third driving tube is connected with the second end of the fourth resistor;
the control end of the fourth driving tube is connected with the second end of the third resistor, the first end of the fourth driving tube is connected with the second end of the third driving tube, and the second end of the fourth driving tube is grounded;
and the first end of the fifth resistor is connected with the second end of the third driving tube and the first end of the fourth driving tube, and the second end of the fifth resistor is connected with the control end of the first switching tube.
5. The floor brush driving apparatus of a vacuum cleaner according to claim 2, further comprising:
and a first diode connected between the first output terminal and the second output terminal.
6. The floor brush driving apparatus of a vacuum cleaner according to claim 2, further comprising:
and the enabling module is used for receiving the enabling signal and controlling the detection module according to the enabling signal.
7. The floor brush driving apparatus of a vacuum cleaner according to claim 6, wherein the detection module comprises:
the anode of the second diode is connected with the second output end;
a first end of the fifth driving tube is connected with the cathode of the second diode, and a control end of the fifth driving tube is connected with the enabling module;
the first end of the sixth resistor is connected with a power supply;
a seventh resistor, wherein the first end of the seventh resistor is connected with the second end of the fifth driving tube;
and the control end of the sixth driving tube is connected with the second end of the seventh resistor, the first end of the sixth driving tube is connected with the second end of the sixth resistor, and the second end of the sixth driving tube is grounded, wherein the first end of the sixth driving tube is a ground brush insertion state detection end.
8. The floor brush driving apparatus of a vacuum cleaner according to claim 6, wherein the enabling module comprises:
An eighth resistor, wherein a first end of the eighth resistor is connected with the enabling signal;
and the control end of the seventh driving tube is connected with the second end of the eighth resistor, the first end of the seventh driving tube is the output end of the enabling module, and the second end of the seventh driving tube is grounded.
9. The floor brush driving apparatus of a vacuum cleaner according to claim 1, wherein the driving module comprises:
the second switch tube is connected with the second output end;
a first stage driver connected to the PWM input;
a second stage driver connected to an output of the first stage driver;
and the output end of the third-stage driver is connected with the control end of the second switching tube.
10. The floor brush driving apparatus of a vacuum cleaner according to claim 9, wherein the first stage driver comprises:
a ninth resistor, wherein a first end of the ninth resistor is connected with a power supply;
a tenth resistor, wherein a first end of the tenth resistor is connected with the PWM input end;
the control end of the eighth driving tube is connected with the second end of the tenth resistor, and the first end of the eighth driving tube is connected with the second end of the ninth resistor;
And the first end of the eleventh resistor is connected with the second end of the eighth driving tube, and the second end of the eleventh resistor is grounded, wherein the first end of the eleventh resistor is the output end of the first-stage driver.
11. The floor brush driving apparatus of a vacuum cleaner according to claim 9, wherein the second stage driver comprises:
a twelfth resistor, a first end of which is connected with a power supply;
a thirteenth resistor, a first end of the thirteenth resistor being connected to a second end of the twelfth resistor;
a control end of the ninth driving tube is connected with the output end of the first stage driver, a first end of the ninth driving tube is connected with the second end of the thirteenth resistor, and a second end of the ninth driving tube is grounded;
a tenth driving tube, the control end of the tenth driving tube is connected with the second end of the twelfth resistor, the first end of the tenth driving tube is connected with the power supply,
a fourteenth resistor, a first end of which is connected to a second end of the tenth driving tube;
and the first end of the fifteenth resistor is connected with the second end of the fourteenth resistor, and the second end of the fifteenth resistor is grounded, wherein the second end of the fourteenth resistor is the output end of the second-stage driver.
12. The floor brush driving apparatus of a vacuum cleaner according to claim 9, wherein the third stage driver comprises:
the anode of the third diode is connected with the output end of the second-stage driver;
an eleventh driving tube, the control end of the eleventh driving tube is connected with the output end of the second stage driver, the first end of the eleventh driving tube is connected with the cathode of the third diode, and the second end of the eleventh driving tube is grounded;
and the first end of the sixteenth resistor is connected with the cathode of the third diode, and the second end of the sixteenth resistor is grounded, wherein the cathode of the third diode is connected with the control end of the second switching tube and the output end of the third stage driver.
13. The floor brush driving apparatus of a vacuum cleaner as claimed in claim 9, further comprising:
and a fourth diode connected between the first output terminal and the second output terminal.
14. The floor brush driving apparatus of a vacuum cleaner according to claim 9, wherein the detection module comprises:
the first sampling resistor is used for detecting the current of the second switching tube and generating sampling current;
And the first operational amplifier is connected with the first sampling resistor and is used for amplifying the sampling current, wherein a ground brush insertion state detection result is generated according to the sampling current.
15. The floor brush driving apparatus of a vacuum cleaner of claim 14, wherein the detection module further comprises:
and the first filter is connected with the first operational amplifier and is used for filtering the amplified sampling current.
16. The floor brush driving apparatus of a vacuum cleaner according to claim 1, wherein the driving module comprises:
the third switching tube is connected with the first output end;
a seventeenth resistor, wherein a first end of the seventeenth resistor is connected with the PWM input end;
an eighteenth resistor, wherein a first end of the eighteenth resistor is connected with a power supply, and a second end of the eighteenth resistor is connected with a second end of the seventeenth resistor;
a twelfth drive tube, wherein the control end of the twelfth drive tube is connected with the second end of the seventeenth resistor;
a twentieth resistor, a first end of the twentieth resistor being connected to the power supply;
a twenty-first resistor, a first end of the twenty-first resistor being connected to the power supply;
A thirteenth drive tube, the control end of the thirteenth drive tube being connected to the second end of the twentieth resistor, the first end of the thirteenth drive tube being connected to the second end of the twenty-first resistor;
a fourteenth driving tube, wherein the control end of the fourteenth driving tube is connected with the second end of the twentieth resistor, the first end of the fourteenth driving tube is connected with the second end of the thirteenth driving tube, and the second end of the fourteenth driving tube is grounded;
and the first end of the twenty-second resistor is connected with the second end of the thirteenth driving tube, and the second end of the twenty-second resistor is connected with the control end of the third switching tube.
17. The floor brush driving apparatus of a vacuum cleaner of claim 16, wherein the detection module comprises:
the first detection sub-module is connected with the first output end and is used for generating a first detection result;
the second detection sub-module is connected with the second output end and is used for generating a second detection result;
and the decision sub-module is used for generating a ground brush insertion state detection result according to the first detection result and the second detection result.
18. The floor brush driving apparatus of a vacuum cleaner as claimed in claim 16, further comprising:
and a fifth diode connected between the first output terminal and the second output terminal.
19. The floor brush driving apparatus of a vacuum cleaner of claim 17, wherein the first detection submodule includes:
a sixth diode, wherein the cathode of the sixth diode is connected with the first output end;
a twenty-third resistor, wherein a first end of the twenty-third resistor is connected with the power supply;
a twenty-fourth resistor, the first end of the twenty-fourth resistor being connected to the second end of the twenty-third resistor;
a twenty-fifth resistor, wherein a first end of the twenty-fifth resistor is connected with a second end of the twenty-fourth resistor, and a second end of the twenty-fifth resistor is grounded;
a twenty-sixth resistor, a first end of the twenty-sixth resistor being connected to the power supply;
and the control end of the fifteenth driving tube is connected with the second end of the twenty-fourth resistor, the first end of the fifteenth driving tube is connected with the second end of the twenty-sixth resistor, and the second end of the fifteenth driving tube is grounded, wherein the second end of the twenty-sixth resistor is the output end of the first detection submodule.
20. The floor brush driving apparatus of a vacuum cleaner of claim 17, wherein the second detection submodule includes:
the second sampling resistor is used for detecting the current of the third switching tube and generating sampling current;
and the second operational amplifier is connected with the second sampling resistor and is used for amplifying the sampling current, wherein the second detection result is generated according to the sampling current.
21. The floor brush driving apparatus of a vacuum cleaner of claim 20, wherein the second detection sub-module further comprises:
and the second filter is connected with the second operational amplifier and is used for filtering the amplified sampling current.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868604.6A CN108742310B (en) | 2018-08-02 | 2018-08-02 | Floor brush driving device of dust collector |
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| CN201810868604.6A CN108742310B (en) | 2018-08-02 | 2018-08-02 | Floor brush driving device of dust collector |
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| CN108742310B true CN108742310B (en) | 2023-08-08 |
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| CN112294185B (en) * | 2019-07-31 | 2024-03-15 | 苏州市春菊电器有限公司 | Dual-detection circuit and method for ground brush load current and motor rotation speed of dust collector |
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| CN1103572A (en) * | 1993-06-25 | 1995-06-14 | 沃维克股份有限公司 | Suction floor cleaner, especially adaptor and details of electric suction cleaner |
| CN203424910U (en) * | 2013-09-18 | 2014-02-12 | 吴臣 | Multifunctional shoe-brushing machine |
| CN104705993A (en) * | 2015-03-25 | 2015-06-17 | 浙江巨力电机成套设备有限公司 | Single-power and dual-drive reciprocating brush device |
| CN205374692U (en) * | 2015-09-08 | 2016-07-06 | 王军 | Aircraft battery power shows and alarm device |
| CN105867512A (en) * | 2016-06-02 | 2016-08-17 | 苏州普发科技有限公司 | Low-power-consumption ground brush detecting circuit for lithium battery dust collector |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103572A (en) * | 1993-06-25 | 1995-06-14 | 沃维克股份有限公司 | Suction floor cleaner, especially adaptor and details of electric suction cleaner |
| CN203424910U (en) * | 2013-09-18 | 2014-02-12 | 吴臣 | Multifunctional shoe-brushing machine |
| CN104705993A (en) * | 2015-03-25 | 2015-06-17 | 浙江巨力电机成套设备有限公司 | Single-power and dual-drive reciprocating brush device |
| CN205374692U (en) * | 2015-09-08 | 2016-07-06 | 王军 | Aircraft battery power shows and alarm device |
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