Control circuit and intelligent dual-mode electric floor brush

Abstract

The utility model discloses a control circuit and intelligent double -mode electric ground brush, control circuit is connected between power supply and ground brush motor to control the working voltage on ground brush motor, and control circuit includes: conversion unit is connected with the output of power supply and the input of ground brush motor respectively and will first voltage of power supply convert into second voltage, sampling unit is connected with the output of ground brush motor to generate sampling voltage according to the sampling current on ground brush motor, comparison unit is connected with sampling unit, and comparison unit is used to generate reference voltage and compare it with sampling voltage to generate switch voltage, switch unit is connected with comparison unit, power supply, conversion unit and ground brush motor respectively and according to the state of switch voltage to ground brush motor transmission first voltage or second voltage. The utility model discloses simple structure does not need singlechip, industrial computer this kind of complex hardware, and the production cost is low, not only improves cleaning efficiency, but also can save the power consumption and increase the endurance time of dust catcher.

Description

[0001] This application claims priority to the following patent: Application No.: 2025214432339, Application Date: July 10, 2025, Invention Title: Control Circuit for Electric Floor Brush and Vacuum Cleaner Technical Field

[0002] This utility model relates to the field of cleaning equipment technology, and in particular to control circuits and intelligent dual-mode electric floor brushes. Background Technology

[0003] Electric floor brushes are an important component of vacuum cleaners, widely used in various cleaning scenarios such as homes and commercial spaces. When working, electric floor brushes make direct contact with floors or carpets to clean dust and debris from their surfaces. However, the resistance on floors and carpets differs, so electric floor brushes need to be able to adjust their output power according to changes in the working environment. Existing electric floor brushes often require the use of cameras or sensors to identify different working environments, thus requiring corresponding industrial control computers or microcontrollers to control these vision devices. This undoubtedly increases the complexity of the product and the manufacturing cost. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a control circuit with a simple structure and convenient control, as well as a control circuit with high cleaning efficiency and good energy-saving effect, and an intelligent dual-mode electric floor brush.

[0005] This utility model discloses a control circuit, which is connected between a power supply and a floor brush motor to control the operating voltage on the floor brush motor. The control circuit includes:

[0006] The conversion unit is connected to the output terminal of the power supply and the input terminal of the floor brush motor respectively, and converts the first voltage of the power supply into the second voltage;

[0007] The sampling unit is connected to the output terminal of the floor brush motor to generate a sampling voltage based on the sampling current on the floor brush motor.

[0008] A comparison unit, connected to a sampling unit, is used to generate a reference voltage and compare it with the sampled voltage to generate a switching voltage.

[0009] The switching unit is connected to the comparison unit, the power supply, the conversion unit, and the floor brush motor, and transmits a first voltage or a second voltage to the floor brush motor according to the state of the switching voltage.

[0010] In one or more embodiments of this utility model, the conversion unit includes a conversion circuit, a filter circuit, and a voltage regulator circuit, wherein,

[0011] The conversion circuit is connected between the power supply and the filter circuit to convert the first voltage into the second voltage;

[0012] The voltage regulator circuit is connected to the output of the filter circuit to generate a third voltage based on the second voltage.

[0013] In one or more embodiments of this utility model, the sampling unit includes a sampling circuit and an amplification circuit, wherein,

[0014] The input terminal of the sampling circuit is connected to the negative terminal of the floor brush motor, and the output terminal is connected to the amplifier circuit. The sampling circuit is used to sample the sampling current on the floor brush motor and amplify it through the amplifier circuit to generate a sampling voltage.

[0015] In one or more embodiments of this utility model, the comparison unit includes a comparison circuit and a reference circuit, wherein,

[0016] The reference circuit is connected to the voltage regulator circuit and generates a reference voltage based on the third voltage.

[0017] The input terminals of the comparator circuit are connected to a reference circuit and an amplifier circuit, respectively, and the output terminal of the comparator circuit is connected to a switching unit to output a comparison voltage; wherein,

[0018] The comparison voltage is high when the voltage value of the sampled voltage is greater than the voltage value of the reference voltage.

[0019] When the voltage value of the sampled voltage is less than the voltage value of the reference voltage, the comparison voltage is at a low level.

[0020] In one or more embodiments of this utility model, the switching unit includes a transistor, a MOSFET, an eighth resistor, and an eighteenth resistor, wherein,

[0021] The control terminal of the transistor is connected to the output terminal of the comparator circuit through the eighth resistor, the first terminal of the transistor is connected to the control terminal of the MOSFET, and the first terminal of the transistor is grounded.

[0022] The first end of the MOSFET is connected to the power supply, and the second end is connected to the input end of the ground brush motor.

[0023] The eighteenth resistor is connected between the first terminal and the control terminal of the MOSFET; wherein...

[0024] When the comparison voltage is high, the transistor and MOSFET are turned on, and the voltage at the input terminal of the ground brush motor is the first voltage;

[0025] When the comparison voltage is low, the transistor and MOSFET are not turned on, and the voltage at the input terminal of the ground brush motor is the second voltage.

[0026] In one or more embodiments of this utility model, the sampling circuit includes a ninth resistor and a nineteenth resistor. The ninth resistor is connected between the output terminal of the floor brush motor and the ground voltage. The first end of the nineteenth resistor is connected to the output terminal of the floor brush motor, and the second end of the nineteenth resistor is connected to the amplifier circuit.

[0027] In one or more embodiments of this utility model, the amplification circuit includes an amplifier, a twelfth resistor, and a thirteenth resistor, wherein,

[0028] The positive input terminal of the amplifier is connected to the second terminal of the nineteenth resistor;

[0029] The first end of the twelfth resistor is grounded, the second end is connected to the first end of the thirteenth resistor, the second end of the thirteenth resistor is connected to the output terminal of the amplifier, and the negative input terminal of the amplifier is connected to the second end of the twelfth resistor.

[0030] The amplifier is also connected to a voltage regulator circuit to be powered by a third voltage.

[0031] In one or more embodiments of this utility model, the comparison circuit includes a comparator, a first resistor, a second resistor, a twenty-first resistor, and a light-emitting diode, wherein,

[0032] The positive input terminal of the comparator is connected to the output terminal of the amplifier through the first resistor, the negative input terminal is connected to the reference voltage, and the output terminal is connected to the control terminal of the transistor through the eighth resistor. The comparator is also connected to a voltage regulator circuit to be powered by a third voltage.

[0033] The second resistor is connected between the positive input terminal and the output terminal of the comparator;

[0034] One end of the 21st resistor is connected to the output terminal of the comparator, and the other end is connected to the first terminal of the light-emitting diode, while the second terminal of the light-emitting diode is grounded.

[0035] In one or more embodiments of this utility model, the reference circuit includes a third resistor and a tenth resistor, wherein,

[0036] The first terminal of the tenth resistor is connected to the third voltage, and the second terminal is connected to the first terminal of the third resistor and outputs a reference voltage; the second terminal of the third resistor is grounded.

[0037] Another aspect of this utility model provides an intelligent dual-mode electric floor brush, which includes the control circuit described above. The intelligent dual-mode electric floor brush also includes a power supply and a floor brush motor. The power supply is connected to the control circuit, and the control circuit is connected to the floor brush motor.

[0038] The beneficial effects of this invention are as follows: This invention controls the voltage of the electric floor brush by setting a control circuit. When working on a flat surface with low resistance, such as a floor, the power supply outputs a second voltage Vout through the control circuit to power the electric floor brush. When the electric floor brush works on a flat surface with high resistance, such as a carpet, the current Id on the electric floor brush increases due to the increased load. After detecting the increase in current Id, the control circuit transmits a first voltage V to power the electric floor brush, thereby enabling the electric floor brush to operate with power matching the load. The control circuit in this invention has a simple structure, does not require complex hardware such as microcontrollers or industrial control computers, and has low manufacturing costs. At the same time, the electric floor brush in this invention can output different power according to the load, which not only improves cleaning efficiency but also saves power consumption and increases the vacuum cleaner's runtime. Attached Figure Description

[0039] Figure 1 This is a circuit diagram of the conversion unit in one embodiment of the present invention;

[0040] Figure 2 This is a circuit diagram of the control circuit in one embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of an electric floor brush module in one embodiment of the present invention.

[0042] In the diagram: control circuit 100, conversion unit 11, conversion circuit 112, filter circuit 112, voltage regulator circuit 113, switching unit 12, sampling unit 13, sampling circuit 131, amplifier circuit 132, comparison unit 14, comparison circuit 141, reference circuit 142, power supply 200, and floor brush motor 300. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0044] The terms "coupled," "connected," or "linked" in the specification include both direct and indirect connections. An indirect connection is a connection made through an intermediate medium, such as a connection made through an electrically conductive medium, which may have a parasitic first inductance or capacitance. Indirect connections may also include connections made through other active or passive devices to achieve the same or similar functional purpose, such as connections through circuits or components like switches or follower circuits. Furthermore, in the invention, terms such as "first" and "second" are primarily used to distinguish one technical feature from another, and do not necessarily require or imply any actual relationship, quantity, or order between these technical features.

[0045] In the detailed description of this specification, reference is made to the accompanying drawings, which form a part thereof, wherein like reference numerals always denote like parts, and wherein exemplary embodiments are shown by way of example that may be implemented. It should be understood that other embodiments may be utilized, and structural or logical changes may be made, without departing from the scope of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0046] The various operations in the specification may be described sequentially as multiple discrete actions or operations in a manner most conducive to understanding the claimed subject matter. However, the order of description should not be construed as implying that these operations must be sequentially related. Specifically, these operations may not be performed in the order presented. The described operations may be performed in a different order than in the described embodiments. Various additional operations may be performed in additional embodiments and / or the described operations may be omitted.

[0047] Various components and devices may be mentioned or shown in the singular form herein, but only for the convenience of discussion, and any element mentioned in the singular form may include multiple such elements as taught herein.

[0048] The description uses the phrases "in one embodiment," "in other embodiments," or "in some embodiments," each of which may refer to one or more of the same or different embodiments. Furthermore, the terms "comprising," "including," "having," etc., used with respect to embodiments of this disclosure are synonymous.

[0049] As described in the background section, most of the existing devices used to control electric floor brushes are high-cost and space-consuming devices such as industrial control computers or microcontrollers, which are not conducive to the development of low-cost and lightweight designs for electric floor brushes.

[0050] For the above issues, please refer to the appendix. Figure 1As shown, this utility model provides a control circuit. The control circuit 100 is connected between the power supply 200 and the floor brush motor 300 to control the working voltage on the floor brush motor 300. The control circuit 100 includes: a conversion unit 11, a sampling unit 13, a comparison unit 14, and a switching unit 12.

[0051] The conversion unit 11 is connected to the output terminal of the power supply 200 and the input terminal of the floor brush motor 300, respectively, and converts the first voltage V1 of the power supply 200 into the second voltage Vout; the sampling unit 13 is connected to the output terminal of the floor brush motor 300 to generate a sampling voltage Vd based on the sampling current Id on the floor brush motor 300; the comparison unit 14 is connected to the sampling unit 13, and the comparison unit 14 is used to generate a reference voltage Ve and compare it with the sampling voltage Vd to generate a switching voltage Vf; the switching unit 12 is connected to the comparison unit 14, the power supply 200, the conversion unit 11 and the floor brush motor 300, respectively, and transmits the first voltage or the second voltage to the floor brush motor 300 according to the state of the switching voltage Vf.

[0052] In this embodiment, the specific parameter values ​​are determined based on actual conditions. For example, the first voltage V1 can be 26V, the second voltage Vout can be 16V, the sampling current Id can be 0.8A, the sampling voltage Vd can be 2.5V, the reference voltage Ve can be 2.5V, and the third voltage can be 5V. The sampling current Id varies depending on the operating environment of the floor brush motor 300; the larger the load, the larger the value of the sampling current Id. The specific parameter values ​​in this embodiment are only for ease of implementation and explanation; the values ​​can be changed as needed during actual operation. In this embodiment, when the floor brush motor 300 operates on the floor, its operating voltage is the second voltage Vout; when the floor brush motor 300 operates on a carpet, its operating voltage is the first voltage V1.

[0053] In a further embodiment, the conversion unit 11 includes a conversion circuit 111, a filter circuit 112, and a voltage regulator circuit 113. The conversion circuit 111 is connected between the power supply 200 and the filter circuit 112 to convert the first voltage V1 into a second voltage Vout. The voltage regulator circuit 113 is connected to the output terminal of the filter circuit 112 to generate a third voltage Vcc based on the second voltage Vout.

[0054] The conversion circuit 111 includes a conversion chip IC3, a fifteenth resistor R15, and a sixth capacitor C6. The first terminal of the conversion chip IC3 is connected to the first voltage V1, the second terminal is grounded, the third terminal is connected to the first voltage V1 through the fifteenth resistor R15, and the fourth terminal is unconnected. The sixth capacitor C6 is connected between the first terminal and the second terminal of the conversion chip IC3.

[0055] The filter circuit 112 includes a fourteenth resistor R14, an eighth capacitor C8, a fourth diode D4, a third inductor L3, a sixteenth resistor R16, and a twentieth resistor R20. The fourteenth resistor R14 is connected between the seventh and eighth terminals of the conversion chip IC3. The eighth capacitor C8 is connected between the seventh and sixth terminals of the conversion chip IC3. The first terminal of the third inductor L3 is connected to both the seventh terminal of the conversion chip IC3 and the first terminal of the fourth diode D4. The second terminal of the fourth diode D4 is grounded. The second terminal of the third inductor L3 is connected to the first terminal of the sixteenth resistor R16. The second terminal of the sixteenth resistor R16 is connected to both the first terminal of the twentieth resistor R20 and the fifth terminal of the conversion chip IC3. The second terminal of the twentieth resistor R20 is grounded. In this embodiment, the conversion chip IC3 converts the first voltage V1 into a second voltage Vout, and the filter circuit performs filtering and noise reduction processing on the second voltage Vout.

[0056] The voltage regulator circuit 113 includes a voltage regulator block VR1, a first capacitor C1, and a second capacitor C2. The input terminal of the voltage regulator block VR1 is connected to the second terminal of the third inductor L3, and its output terminal outputs a third voltage Vcc. The first terminal of the first capacitor C1 is connected to the output terminal of the voltage regulator block VR1, and its second terminal is grounded. The first terminal of the second capacitor C2 is connected to the output terminal of the voltage regulator block VR1, and its second terminal is grounded. The voltage regulator block VR1 is used to regulate the second voltage Vout to generate the third voltage Vcc, which powers the sampling unit 13 and the comparison unit 14.

[0057] In a further embodiment, such as Figure 2 As shown, the sampling unit 13 includes a sampling circuit 131 and an amplification circuit 132. The input terminal of the sampling circuit 131 is connected to the negative terminal P2 of the floor brush motor 300, and the output terminal is connected to the amplification circuit 132. The sampling circuit 131 is used to sample the sampling current Id on the floor brush motor 300 and amplify it through the amplification circuit 132 to generate a sampling voltage Vd.

[0058] Comparison unit 14 includes a comparison circuit 141 and a reference circuit 142. The reference circuit 142 is connected to the voltage regulator circuit 113 and generates a reference voltage Ve based on the third voltage Vcc. The input terminals of the comparison circuit 141 are connected to the reference circuit 142 and the amplifier circuit 132, respectively. The output terminal of the comparison circuit 141 is connected to the switching unit 12 to output a comparison voltage Vf.

[0059] When the voltage value of the sampling voltage Vd is greater than the voltage value of the reference voltage Ve, the comparison voltage Vf is at a high level;

[0060] When the voltage value of the sampling voltage Vd is less than the voltage value of the reference voltage Ve, the comparison voltage Vf is at a low level.

[0061] In a further embodiment, the switching unit 12 includes a transistor Q2, a MOSFET Q3, an eighth resistor R8, and an eighteenth resistor R18. The control terminal of transistor Q2 is connected to the output terminal of the comparator circuit 141 via the eighth resistor R8. The first terminal of transistor Q2 is connected to the control terminal of MOSFET Q3, and the first terminal of transistor Q2 is grounded. The first terminal of MOSFET Q3 is connected to the power supply 200, and the second terminal is connected to the input terminal of the ground brush motor 300. The eighteenth resistor R18 is connected between the first terminal and the control terminal of MOSFET Q3.

[0062] When the comparison voltage is high, transistor Q2 and MOSFET Q3 are turned on, and the voltage at the input terminal of the ground brush motor 300 is the first voltage V1.

[0063] When the comparison voltage is low, transistors Q2 and Q3 are not turned on, and the voltage at the input terminal of the ground brush motor 300 is the second voltage Vout.

[0064] In this embodiment, the control terminal of transistor Q2 is the base, the first terminal is the collector, and the second terminal is the emitter; MOSFET Q3 is a P-channel transistor, with the first terminal being the source, the second terminal being the drain, and the control terminal being the gate.

[0065] In a further embodiment, the sampling circuit 131 includes a ninth resistor R9 and a nineteenth resistor R19. The ninth resistor R9 is connected between the output terminal P2 of the floor brush motor 300 and the ground voltage. The first end of the nineteenth resistor R19 is connected to the output terminal of the floor brush motor 300, and the second end of the nineteenth resistor R19 is connected to the amplifier circuit 132.

[0066] In a further embodiment, the amplifier circuit 132 includes an amplifier IC4B, a twelfth resistor R12, and a thirteenth resistor R13. The positive input terminal of the amplifier IC4B is connected to the second terminal of the nineteenth resistor R19. The first terminal of the twelfth resistor R12 is grounded, and the second terminal is connected to the first terminal of the thirteenth resistor R13. The second terminal of the thirteenth resistor R13 is connected to the output terminal of the amplifier IC4B, and the negative input terminal of the amplifier IC4B is connected to the second terminal of the twelfth resistor R12. The amplifier IC4B is also connected to a voltage regulator circuit and powered by a third voltage Vcc.

[0067] In this embodiment, the positive input terminal of amplifier IC4B samples the voltage at the ninth resistor R9 through the nineteenth resistor R19 and amplifies it by 125 times to obtain the sampled voltage Vd. The amplification factor can be adjusted by the values ​​of the twelfth resistor R12 and the thirteenth resistor R13.

[0068] The comparator circuit 141 includes a comparator IC4A, a first resistor R1, a second resistor R2, a twenty-first resistor R21, and a light-emitting diode (LED). The positive input terminal of the comparator IC4A is connected to the output terminal of the amplifier IC4B through the first resistor, and the negative input terminal of the comparator IC4A is connected to the reference voltage Ve. The output terminal is connected to the control terminal of the transistor Q2 through the eighth resistor R8. The comparator IC4A is also connected to the voltage regulator circuit 113 and powered by the third voltage Vcc. The second resistor R2 is connected between the positive input terminal and the output terminal of the comparator IC4A. One end of the twenty-first resistor R21 is connected to the output terminal of the comparator IC4A, and the other end is connected to the first terminal of the LED. The second terminal of the LED is grounded. In this embodiment, the comparison voltage Vf connected to the output terminal of the comparator IC4A can be displayed through the LED to confirm the working status of the electric ground brush.

[0069] In this embodiment, comparator IC4A compares the sampled voltage Vd with the reference voltage Ve. In this embodiment, the reference voltage Ve is 2.5V, which corresponds to the sampled current Id on the brush motor 300 being 0.025A. The value of the reference voltage Ve is a critical value, which can be adjusted by the values ​​of the ninth resistor R9 and the nineteenth resistor R19 to adapt to different models of brush motors 300 or different working environments.

[0070] In a further embodiment, the reference circuit 142 includes a third resistor R3 and a tenth resistor R10, wherein the first end of the tenth resistor R10 is connected to the third voltage Vcc, the second end is connected to the first end of the third resistor R3 and outputs the reference voltage Ve; the second end of the third resistor R3 is grounded.

[0071] This utility model also provides an intelligent dual-mode electric floor brush, including a control circuit 100, a power supply 200 and a floor brush motor 300. The power supply 200 is connected to the control circuit 100 and the control circuit 100 is connected to the floor brush motor 300.

[0072] In this embodiment, the floor brush motor 300 has two operating modes. When the floor brush motor 300 is working on the floor or a flat surface with low resistance, the value of the sampling current Id on the floor brush motor 300 is small, and the value of the sampling voltage Vd is less than the value of the reference voltage Ve. Therefore, the signal output by the comparator IC4A is low, so the transistor Q2 is not turned on. As a result, the voltage at the control terminal of the MOS transistor is pulled up to the first voltage V1 by the eighteenth resistor R18. Therefore, the MOS transistor is in a non-conducting state. At this time, the second voltage Vout output by the conversion circuit 11 supplies power to the floor brush motor 300.

[0073] When the floor brush motor 300 operates in a carpeted or high-resistance environment, the value of the sampling current Id increases, and consequently, the sampling voltage Vd is greater than the reference voltage Ve. Therefore, the output signal of the comparator IC4A is high, which turns on the transistor Q2, thereby pulling the voltage at the control terminal of the MOSFET down to ground. Thus, the MOSFET is turned on and powered by the first voltage V1, thereby increasing the power of the floor brush motor 300. A third diode D3 is also connected in series at the output of the third inductor L3. Its first end is connected to the third inductor L3, and its other end is connected to the input terminal P2 of the floor brush motor 300. It is used to prevent the first voltage V1 of the power supply 200 from flowing back into the second voltage Vout when the MOSFET is turned on, thus preventing damage to the electrical components.

[0074] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A control circuit (100) connected between a power supply (200) and a floor brush motor (300) to control the operating voltage on the floor brush motor (300), characterized in that, The control circuit (100) includes: The conversion unit (11) is connected to the output terminal of the power supply (200) and the input terminal of the floor brush motor (300) respectively, and converts the first voltage of the power supply (200) into the second voltage; The sampling unit (13) is connected to the output terminal of the floor brush motor (300) to generate a sampling voltage based on the sampling current on the floor brush motor (300); The comparison unit (14) is connected to the sampling unit (13). The comparison unit (14) is used to generate a reference voltage and compare it with the sampled voltage to generate a switching voltage. The switching unit (12) is connected to the comparison unit (14), the power supply (200), the conversion unit (11) and the floor brush motor (300) respectively, and transmits a first voltage or a second voltage to the floor brush motor (300) according to the state of the switching voltage.

2. The control circuit according to claim 1, characterized in that, The conversion unit (11) includes a conversion circuit (111), a filter circuit (112), and a voltage regulator circuit (113), wherein, The conversion circuit (111) is connected between the power supply (200) and the filter circuit (112) to convert the first voltage into the second voltage; The voltage regulator circuit (113) is connected to the output of the filter circuit (112) to generate a third voltage based on the second voltage.

3. The control circuit according to claim 2, characterized in that, The sampling unit (13) includes a sampling circuit (131) and an amplification circuit (132), wherein, The input terminal of the sampling circuit (131) is connected to the negative terminal of the floor brush motor (300), and the output terminal is connected to the amplifier circuit (132). The sampling circuit (131) is used to sample the sampling current on the floor brush motor (300) and amplify it through the amplifier circuit (132) to generate a sampling voltage.

4. A control circuit according to claim 3, characterized in that, The comparison unit (14) includes a comparison circuit (141) and a reference circuit (142), wherein, The reference circuit (142) is connected to the voltage regulator circuit (113) and generates a reference voltage based on the third voltage; The input terminals of the comparator circuit (141) are connected to the reference circuit (142) and the amplifier circuit, respectively, and the output terminal of the comparator circuit (141) is connected to the switching unit (12) to output a comparison voltage; wherein, The comparison voltage is high when the voltage value of the sampled voltage is greater than the voltage value of the reference voltage. When the voltage value of the sampled voltage is less than the voltage value of the reference voltage, the comparison voltage is at a low level.

5. A control circuit according to claim 4, characterized in that, The switching unit (12) includes a transistor, a MOSFET, an eighth resistor, and an eighteenth resistor, wherein, The control terminal of the transistor is connected to the output terminal of the comparator circuit (141) through the eighth resistor, the first terminal of the transistor is connected to the control terminal of the MOS transistor, and the first terminal of the transistor is grounded. The first end of the MOS transistor is connected to the power supply (200), and the second end is connected to the input end of the ground brush motor (300); The eighteenth resistor is connected between the first terminal and the control terminal of the MOSFET; wherein... When the comparison voltage is high, the transistor and MOSFET are turned on, and the voltage at the input terminal of the ground brush motor (300) is the first voltage; When the comparison voltage is low, the transistor and MOSFET are not turned on, and the voltage at the input terminal of the ground brush motor (300) is the second voltage.

6. A control circuit according to claim 3, characterized in that, The sampling circuit (131) includes a ninth resistor and a nineteenth resistor. The ninth resistor is connected between the output terminal of the floor brush motor (300) and the ground voltage. The first end of the nineteenth resistor is connected to the output terminal of the floor brush motor (300), and the second end of the nineteenth resistor is connected to the amplifier circuit (132).

7. A control circuit according to claim 6, characterized in that, The amplifier circuit (132) includes an amplifier, a twelfth resistor, and a thirteenth resistor, wherein, The positive input terminal of the amplifier is connected to the second terminal of the nineteenth resistor; The first end of the twelfth resistor is grounded, the second end is connected to the first end of the thirteenth resistor, the second end of the thirteenth resistor is connected to the output terminal of the amplifier, and the negative input terminal of the amplifier is connected to the second end of the twelfth resistor. The amplifier is also connected to a voltage regulator circuit to be powered by a third voltage.

8. A control circuit according to claim 4, characterized in that, The comparator circuit (141) includes a comparator, a first resistor, a second resistor, a twenty-first resistor, and a light-emitting diode, wherein, The positive input terminal of the comparator is connected to the output terminal of the amplifier through the first resistor, the negative input terminal is connected to the reference voltage, and the output terminal is connected to the control terminal of the transistor through the eighth resistor. The comparator is also connected to a voltage regulator circuit to be powered by a third voltage. The second resistor is connected between the positive input terminal and the output terminal of the comparator; One end of the 21st resistor is connected to the output of the comparator, and the other end is connected to the first end of the light-emitting diode, while the second end of the light-emitting diode is grounded.

9. A control circuit according to claim 8, characterized in that, The reference circuit (142) includes a third resistor and a tenth resistor, wherein, The first terminal of the tenth resistor is connected to the third voltage, and the second terminal is connected to the first terminal of the third resistor and outputs a reference voltage; the second terminal of the third resistor is grounded.

10. A smart dual-mode electric floor brush, comprising the control circuit (100) according to any one of claims 1 to 9, characterized in that, The intelligent dual-mode electric floor brush also includes a power supply (200) and a floor brush motor (300), wherein the power supply (200) is connected to a control circuit (100) and the control circuit (100) is connected to the floor brush motor (300).

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