Double-roller floor brush, vacuum cleaner and dust cleaning method

Abstract

The present invention relates to a double-roller floor brush, a vacuum cleaner and a dust cleaning method, which belongs to the technical field of household appliances and is used to solve the problem that the existing double-roller floor brush cannot perform targeted and efficient cleaning according to the moving direction of the floor brush. The double-roller floor brush of the present invention includes a front roller brush unit, a rear roller brush unit, a control unit and a detection unit; the detection unit is used to detect the running direction of the double-roller floor brush in real time and transmit the generated signal to the control unit; the control unit controls the operation of the front roller brush unit and the rear roller brush unit respectively according to the signal transmitted by the detection unit. The present invention can adjust the rotation speed of the front roller brush unit and the rear roller brush unit in real time according to the running direction of the double-roller floor brush, so that the front roller brush unit and the rear roller brush unit can operate at different rotation speeds according to the running direction of the double-roller floor brush, so that the double-roller floor brush can perform targeted and efficient cleaning according to the forward direction.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a double-roller floor brush, a vacuum cleaner and a dust cleaning method. Background Art

[0002] The existing double roller floor brush includes a front roller brush and a rear roller brush. During use, the front roller brush and the rear roller brush rotate at the same speed. This method cannot perform targeted and efficient cleaning according to the moving direction of the floor brush. Summary of the Invention

[0003] In view of the above analysis, the embodiments of the present invention aim to provide a double-roller floor brush, a vacuum cleaner and a dust cleaning method to solve the problem that the existing double-roller floor brush cannot perform targeted and efficient cleaning according to the moving direction of the floor brush.

[0004] On the one hand, the present invention provides a double-roller brush, including a front roller brush unit, a rear roller brush unit, a control unit and a detection unit; the detection unit is used to detect the running direction of the double-roller brush in real time and transmit the generated signal to the control unit; the control unit controls the operation of the front roller brush unit and the rear roller brush unit respectively according to the signal transmitted by the detection unit.

[0005] Furthermore, the detection unit includes a sensor, which is connected to the control unit. The sensor can detect the running direction of the double roller brush, and the sensor transmits a real-time generated signal to the control unit.

[0006] Furthermore, the sensor is a forward and reverse rotation sensor, which can detect the rotation direction of the rollers of the double roller brush and generate a corresponding signal.

[0007] Furthermore, the front roller brush unit includes a front roller brush and a front roller brush motor, the front roller brush motor is used to drive the front roller brush to rotate, and the front roller brush motor is connected to the control unit;

[0008] The rear roller brush unit includes a rear roller brush and a rear roller brush motor. The rear roller brush motor is used to drive the rear roller brush to rotate, and the rear roller brush motor is connected to the control unit.

[0009] Furthermore, it also includes a roller brush housing, a front roller and a rear roller, the front roller is arranged on the front side of the bottom plate of the roller brush housing, and the rear roller is located behind the roller brush housing;

[0010] The detection unit is arranged on the rear roller, and the detection unit can detect the rotation direction of the rear roller in real time.

[0011] Furthermore, the rear roller is arranged behind the roller brush housing through a support plate;

[0012] The front end of the support plate is connected to the rear end surface of the roller brush housing. The rear roller is arranged at the rear end of the side wall of the support plate, and the rear roller does not contact the roller brush housing.

[0013] Furthermore, the rear roller includes a wheel body, an axle body and a sleeve, the sleeve is connected to the support plate, one end of the axle body is connected to the wheel body, and the other end of the axle body passes through the sleeve and is rotatably connected to the support plate.

[0014] Furthermore, the detection unit is mounted on the inner wall of the sleeve, opposite to the outer wall of the shaft.

[0015] Furthermore, the detection unit can also detect the running speed of the double roller brush in real time, and generate a corresponding speed signal, and transmit the speed signal to the control unit. The control unit can control the running speed of the front roller brush unit and the rear roller brush unit according to the speed signal.

[0016] On the other hand, the present invention provides a vacuum cleaner comprising a main body and the above-mentioned double-roller brush, wherein the main body is connected to the double-roller brush via a suction pipe.

[0017] In another aspect, the present invention provides a dust cleaning method using the above-mentioned double roller brush for cleaning, comprising the following steps:

[0018] Step 1: The detection unit detects the running direction of the double roller brush in real time and transmits the generated signal to the control unit;

[0019] Step 2: The control unit analyzes the running direction of the dual roller brushes according to the received signal and sends instructions to the front roller brush unit and the rear roller brush unit respectively;

[0020] Step 3: When the double roller brushes are pushed forward, the control unit controls the front roller brush and the rear roller brush to rotate forward. The speed of the front roller brush is V1, and the speed of the rear roller brush is V2, and V1>V2;

[0021] When the double roller brushes are dragged backward, the control unit controls the front roller brush and the rear roller brush to rotate backward, and V1 <V2。

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] (1) The speed of the front roller brush unit and the rear roller brush unit can be adjusted in real time according to the running direction of the double roller brush, so that the front roller brush unit and the rear roller brush unit can run at different speeds according to the running direction of the double roller brush, so that the double roller brush can perform targeted and efficient cleaning according to the forward direction;

[0024] (2) When pushing the double roller brush forward, increase the speed of the front roller; when dragging the double roller brush backward, increase the speed of the rear roller (forward or backward), so that the double roller brush can be controlled to clean in a targeted manner according to the direction of movement;

[0025] (3) When the double roller brush is running, the front roller brush and the rear roller brush do not need to be kept in the high-speed position at the same time, which can reduce power consumption and extend the service life of the front roller brush and the rear roller brush;

[0026] (4) The detection unit can also detect the running speed of the double roller brush in real time and transmit the speed signal to the control unit. The control unit controls the rotation speed of the front roller brush and the rear roller brush in real time based on the running speed, so that the double roller brush can achieve more intelligent, targeted and efficient cleaning.

[0027] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following description, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0029] Figure 1 A top view of a double roller brush according to a specific embodiment;

[0030] Figure 2 It is a front view of a double roller brush according to a specific embodiment;

[0031] Figure 3 It is a partial transverse cross-sectional view of a double roller brush according to a specific embodiment;

[0032] Figure 4 It is a partial longitudinal cross-sectional view of a double roller brush according to a specific embodiment;

[0033] Figure 5 This is a schematic diagram of the forward push of a double roller brush in a specific embodiment;

[0034] Figure 6 A schematic diagram of the rear drag of a double roller brush according to a specific embodiment;

[0035] Figure 7 It is a structural block diagram of a double roller brush in a specific embodiment.

[0036] Reference numerals:

[0037] 1-Front roller brush unit; 11-Front roller brush; 12-Front roller brush motor; 2-Rear roller brush unit; 21-Rear roller brush; 22-Rear roller brush motor; 3-Control unit; 4-Detection unit; 5-Roller brush housing; 6-Front roller; 7-Rear roller; 71-Wheel body; 711-Assembly groove; 72-Axis body; 73-Sleeve; 8-Support plate; 9-Suction pipe. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0039] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the term "connected" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] The terms "top," "bottom," "above," "below," and "on" used throughout the description refer to relative positions of components of a device, such as the relative positions of top and bottom substrates within a device. It will be understood that devices are multifunctional regardless of their orientation in space.

[0041] The working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal surface and used on the horizontal surface, and "high and low" and "up and down" are defined in this way.

[0042] Example 1

[0043] This embodiment provides a double roller brush, such as Figure 1-Figure 7 As shown, it includes a front roller brush unit 1, a rear roller brush unit 2, a control unit 3 and a detection unit 4. The control unit 3 is connected to the front roller brush unit 1, the rear roller brush unit 2 and the detection unit 4 respectively. Specifically, the detection unit 4 is used to detect the running direction of the double roller brush in real time and transmit the generated signal to the control unit 3. The control unit 3 controls the operation of the front roller brush unit 1 and the rear roller brush unit 2 according to the signal transmitted by the detection unit 4, so that the front roller brush unit 1 and the rear roller brush unit 2 can run at different speeds.

[0044] Compared with the existing technology, the double roller brush provided in this embodiment can adjust the rotation speed of the front roller brush unit 1 and the rear roller brush unit 2 in real time according to the running direction of the double roller brush, so that the front roller brush unit 1 and the rear roller brush unit 2 can operate at different speeds according to the running direction of the double roller brush, so that the double roller brush can perform targeted and efficient cleaning according to the forward direction.

[0045] Specifically, the front roller brush unit 1 includes a front roller brush 11 and a front roller brush motor 12. The front roller brush motor 12 is used to drive the front roller brush 11 to rotate. The front roller brush motor 12 is connected to the control unit 3, that is, the rotation direction and speed of the front roller brush motor 12 are controlled by the control unit 3.

[0046] Similarly, the rear roller brush unit 2 includes a rear roller brush 21 and a rear roller brush motor 22. The rear roller brush motor 22 is used to drive the rear roller brush 21 to rotate. The rear roller brush motor 22 is connected to the control unit 3, that is, the rotation direction and speed of the rear roller brush motor 22 are controlled by the control unit 3.

[0047] The control unit 3 includes an information module and a main control module connected to the information module. The information module is used to receive and process the signal sent by the detection unit 4. The information module transmits the processed signal data to the main control module. The main control module controls the front roller brush motor 12 and the rear roller brush motor 22 according to the received signal data, thereby controlling the rotation direction and speed of the front roller brush 11 and the rear roller brush 12. Specifically, when the double roller brushes are pushed forward, the detection unit 4 sends the detected signal to the control unit 3. After receiving the signal, the control unit 3 analyzes that the double roller brushes are running forward, thereby controlling the front roller brush 11 and the rear roller brush 21 to rotate forward, and the speed of the front roller brush 11 is V1, and the speed of the rear roller brush 21 is V2, and V1>V2; when the double roller brushes are dragged backward, the detection unit 4 sends the detected signal to the control unit 3. After receiving the signal, the control unit 3 analyzes that the double roller brushes are running backward, thereby controlling the front roller brush 11 and the rear roller brush 21 to rotate backward, and V1 <V2。

[0048] In order to more quickly control the rotation of the front roller brush 11 and the rear roller brush 21, the rotation speeds of the front roller brush 11 and the rear roller brush 21 are set to the first gear and the second gear, with the first gear speed value being R1 and the second gear speed value being R2, and R1>R2. At this time, the control unit 3 includes a speed module, R1 and R2 are stored in the speed module, and the control unit 3 specifically controls the rotation speeds of the front roller brush 11 and the rear roller brush 21 according to the speed module. When pushing the floor brush forward, V1=R1, V2=R2; when dragging the floor brush backward, V1=R2, V2=R1. It should be noted that R1 and R2 are fixed values, which can be set when the floor brush leaves the factory, or manually set by the user according to the specific cleaning situation. In this embodiment, R1=2R2.

[0049] The detection unit 4 is used to detect the running direction of the double roller brush in real time, that is, whether the double roller brush is pushing forward or dragging backward. The detection unit 4 is connected to the control unit 3 and sends the signal it generates to the control unit 3.

[0050] The detection unit 4 includes a sensor, which is connected to the control unit 3. The sensor can detect the running direction of the double roller brush, and the sensor transmits the real-time generated signal to the control unit 3.

[0051] It should be noted that any sensor that can detect the running direction of the double roller brush in real time can be used as the sensor of the detection unit 4.

[0052] In this embodiment, the sensor is a forward / reverse sensor that detects the rotation direction of the rollers of the dual-roller brushes and generates a corresponding signal. The sensor transmits the signal to the control unit 3, which analyzes the running direction of the dual-roller brushes and controls the operation of the front and rear brushes 11, 12. In this embodiment, when the dual-roller brushes are pushed forward, the rollers rotate clockwise; when the dual-roller brushes are dragged backward, the rollers rotate counterclockwise. The forward / reverse sensor determines the running direction of the brushes based on the rotation direction of the rollers.

[0053] The double roller floor brush also includes a roller brush shell 5, a front roller 6 and a rear roller 7. The roller brush shell 5 is provided with a front roller brush cavity for installing a front roller brush 11 and a rear roller brush cavity for installing a rear roller brush 12. The front roller brush 11 is located in front of the rear roller brush 12, that is, the front roller brush cavity is located on the front side of the rear roller brush cavity.

[0054] In order to reduce the volume of the roller brush housing 5 and make the weight distribution of the double roller brushes more reasonable, the front roller brush motor 12 and the rear roller brush motor 13 are located at the top of the roller brush housing 5, specifically, above the middle of the front roller brush cavity and the rear roller brush cavity, and are respectively arranged on the left and right sides.

[0055] The front roller 6 is arranged on the front side of the bottom plate of the roller brush housing 5 and in front of the front roller brush 11. In order to prevent the bottom plate of the roller brush housing 5 from being too high from the surface to be cleaned, thereby affecting the cleaning effect of the floor brush, the front roller 6 is relatively small. Specifically, the ratio of the diameter of the front roller 6 to the height of the roller brush housing 5 (the height is the maximum height of the roller brush housing 5) is not greater than 1:5. In this embodiment, the diameter of the front roller 6 and the height of the roller brush housing 5 are 1:6.

[0056] The rear roller 7 is located behind the roller brush housing 5. Specifically, the rear roller 7 is arranged behind the roller brush housing 5 via a support plate 8. Furthermore, the front end of the support plate 8 is connected to the rear end surface of the roller brush housing 5. The rear roller 7 is arranged at the rear end of the side wall of the support plate 8. The rear roller 7 does not contact the roller brush housing 5, that is, there is a certain distance between the rear roller 7 and the roller brush housing 5 to avoid affecting the rotation of the rear roller 7. In this embodiment, the length of the support plate 8 (the length is the distance between the front and rear end surfaces of the support plate 8) is greater than the diameter of the rear roller 7, and the rear roller 7 is flush with the rear end surface of the support plate 8.

[0057] In order to ensure the flexible operation and speed of the double roller brushes, as well as to improve the user's comfort and save the user's physical strength, the rear roller 7 is larger. Specifically, the ratio of the diameter of the rear roller 7 to the height of the roller brush shell 5 is not less than 1:2. In this embodiment, the ratio of the diameter of the rear roller 7 to the height of the roller brush shell 5 is 4:5.

[0058] Since the diameter and volume of the rear roller 7 are much larger than those of the front roller 6, in this embodiment, the detection unit 4 is arranged on the rear roller 7, that is, the forward and reverse sensor is arranged on the rear roller 7. The signal of the rotation direction of the rear roller 7 detected by the forward and reverse sensor is transmitted to the control unit 3. The control unit 3 analyzes the operating status of the double-roller brush through the signal of the rotation direction of the rear roller 7, thereby controlling the rotation direction and rotation speed of the front roller 11 and the rear roller 12, thereby realizing targeted and efficient cleaning of the double-roller brush.

[0059] The rear roller 7 includes a wheel body 71, a shaft body 72, and a sleeve 73. The sleeve 73 is connected to the support plate 8. One end of the shaft body 72 is connected to the wheel body 71, and the other end of the shaft body 72 passes through the sleeve 73 and is rotatably connected to the support plate 8. The shaft body 72 drives the wheel body 71 to rotate (or the wheel body 71 drives the shaft body 72 to rotate). The sleeve 73 and the support plate 8 are relatively stationary, that is, the sleeve 73 does not rotate with the shaft body 72 or the wheel body 71. The detection unit 4 is mounted on the inner wall of the sleeve 73, opposite the outer wall of the shaft body 72. The detection unit 4 can detect the rotation direction of the shaft body 72. In this embodiment, the forward and reverse rotation sensor is embedded in the inner wall of the sleeve 73, opposite the outer wall of the rotating shaft 72.

[0060] To ensure the stability of the rear roller 7, the sleeve 73 and the support plate 8 are integrally formed, with a certain gap left between the sleeve 73 and the shaft 72. The gap cannot be too small, as it must accommodate the installation space of the detection unit 4 and not hinder the rotation of the shaft 72. The gap cannot be too large, as it may cause the rear roller 7 to roll unsteadily and deflect, or even worse, affect the detection effect of the detection unit 4. Specifically, the width of the gap is no greater than twice the width of the detection unit 4 exposed on the inner wall of the sleeve 73 (the width is the distance from the detection head of the detection unit 4 to the inner wall of the sleeve 73 where it is installed).

[0061] In this embodiment, in order to ensure the compact layout and stability of the rear roller 7, an assembly groove 711 is provided on the side wall of the wheel body 71 facing the support plate 8. After the shaft body 72 passes through the sleeve 73 and is rotatably connected to the support plate 8, the wheel body 71 is covered on the sleeve 73, that is, the sleeve 73 is located in the assembly groove 711, and a gap is left between the side wall of the assembly groove 711 and the outer wall of the sleeve 73 for the wheel body 71 to rotate. Similarly, the gap should also be appropriate, so as not to hinder the rotation of the wheel body 71 if it is too small, and at least reduce the stability of the rear roller 7 if it is too large.

[0062] The double roller brush also includes a power supply unit, which is respectively connected to the front roller brush unit 1, the rear roller brush unit 2, the control unit 3 and the detection unit 4 to provide working power for these units.

[0063] The working principle of the double roller brush of this embodiment:

[0064] When the double roller brushes are pushed forward, the forward and reverse rotation sensor detects in real time that the rear roller 7 is rotating in the clockwise direction, generates a clockwise rotation signal, and sends the real-time detected signal to the control unit 3. After receiving the signal, the control unit 3 analyzes that the double roller brushes are moving forward, thereby controlling the front roller brush 11 and the rear roller brush 21 to rotate forward, and V1>V2;

[0065] When the double roller brushes are dragged backward, the forward and reverse sensors detect in real time that the rear roller 7 is rotating counterclockwise, generate a counterclockwise rotation signal, and send the real-time detected signal to the control unit 3. After receiving the signal, the control unit 3 analyzes that the double roller brushes are running backward, thereby controlling the front roller brush 11 and the rear roller brush 21 to rotate backward, and V1 <V2。

[0066] It should be noted that in addition to pre-setting the two speed settings R1 and R2 to control the rotational speed of the front and rear brushes 11 and 21, more speed settings can be set. Furthermore, the detection unit 4 can also detect the operating speed of the dual roller brushes in real time and transmit the speed signal to the control unit 3. The control unit 3 uses the operating speed to control the real-time rotational speed of the front and rear brushes 11 and 12, enabling the dual roller brushes to achieve more intelligent, targeted, and efficient cleaning.

[0067] For example, the forward and reverse sensor in this embodiment can detect the rotation speed of the rear roller 7 in real time, and the rotation speed is recorded as V t (It should be noted that V t The control unit converts the speed of the rear roller into the value of the speed of the front roller brush or the rear roller brush), and then detects the running speed of the double roller brush. At this time, the control unit 3 detects the V in real time. t Automatically adjust the speed of the front or rear roller brush. Specifically, when the double roller brush is pushed forward, V1 = V t ; When the double roller brush is dragged backward, V2=Vt .

[0068] Compared with the prior art, the double roller floor brush provided in this embodiment has at least one of the following beneficial effects:

[0069] (1) The speed of the front roller brush unit and the rear roller brush unit can be adjusted in real time according to the running direction of the double roller brush, so that the front roller brush unit and the rear roller brush unit can run at different speeds according to the running direction of the double roller brush, so that the double roller brush can perform targeted and efficient cleaning according to the forward direction;

[0070] (2) When pushing the double roller brush forward, increase the speed of the front roller; when dragging the double roller brush backward, increase the speed of the rear roller (forward or backward), so that the double roller brush can be controlled to clean in a targeted manner according to the direction of movement;

[0071] (3) When the double roller brush is running, the front roller brush and the rear roller brush do not need to be kept in the high-speed position at the same time, which can reduce power consumption and extend the service life of the front roller brush and the rear roller brush;

[0072] (4) The detection unit can also detect the running speed of the double roller brush in real time and transmit the speed signal to the control unit. The control unit controls the rotation speed of the front roller brush and the rear roller brush in real time based on the running speed, so that the double roller brush can achieve more intelligent, targeted and efficient cleaning.

[0073] Example 2

[0074] This embodiment provides a vacuum cleaner, such as Figure 1-Figure 7 As shown, it includes a main body and the double roller brush provided in Example 1, and the main body is connected to the double roller brush through a suction pipe 9.

[0075] Compared with the prior art, the beneficial effects of the vacuum cleaner provided by this embodiment are basically the same as the beneficial effects of the double roller brush provided by the first embodiment, and will not be described in detail here.

[0076] Example 3

[0077] This embodiment provides a dust cleaning method, comprising the following steps:

[0078] Step 1: The detection unit 4 detects the running direction of the double roller brush in real time and transmits the generated signal to the control unit 3;

[0079] Step 2: The control unit 3 analyzes the running direction of the dual roller brushes according to the received signal and sends instructions to the front roller brush unit 1 and the rear roller brush unit 2 respectively;

[0080] Step 3: When the dual roller brushes are pushed forward, the control unit 3 controls the front roller brush 11 and the rear roller brush 21 to rotate forward. The rotation speed of the front roller brush 11 is V1, and the rotation speed of the rear roller brush 21 is V2, and V1>V2;

[0081] When the double roller brushes are dragged backward, the control unit 3 controls the front roller brush 11 and the rear roller brush 21 to rotate backward, and V1 <V2。

[0082] Compared with the prior art, the beneficial effects of the dust cleaning method provided in this embodiment are basically the same as the beneficial effects of the double roller brush provided in Example 1, and will not be described in detail here.

[0083] Specifically, in the above step 3, when the floor brush is pushed forward, V1 = R1, V2 = R2; when the floor brush is dragged backward, V1 = R2, V2 = R1. In the above step 1, if the detection unit 4 can also detect the running speed of the double roller floor brush, when the double roller floor brush is pushed forward, V1 = V t ; When the double roller brush is dragged backward, V2=V t .

[0084] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A double roller floor brush, characterized in that: It comprises a front roller brush unit (1), a rear roller brush unit (2), a control unit (3) and a detection unit (4); The detection unit (4) is used to detect the running direction of the double roller brush in real time and transmit the generated signal to the control unit (3); The control unit (3) controls the operation of the front roller brush unit (1) and the rear roller brush unit (2) respectively according to the signal transmitted by the detection unit (4); It also includes a roller brush housing (5), a front roller (6) and a rear roller (7), wherein the front roller (6) is arranged on the front side of the bottom plate of the roller brush housing (5), and the rear roller (7) is located behind the roller brush housing (5); the ratio of the diameter of the front roller (6) to the height of the roller brush housing (5) is not greater than 1:5; the ratio of the diameter of the rear roller (7) to the height of the roller brush housing (5) is not less than 1:2; the detection unit (4) includes a sensor, which is connected to the control unit (3), and the sensor can detect the running direction of the double roller brush, and the sensor transmits a real-time generated signal to the control unit (3); The sensor is a forward and reverse rotation sensor, which is arranged on the rear roller (7). The signal of the rotation direction of the rear roller detected by the forward and reverse rotation sensor is transmitted to the control unit (3); The forward and reverse rotation sensor can detect the rotation speed of the rear roller (7) in real time, which is recorded as V t , where V t The control unit converts the speed of the rear roller into the value of the speed of the front roller brush or the rear roller brush, and then detects the running speed of the double roller brush. The control unit (3) detects the V in real time. t Automatically adjust the speed of the front or rear roller brush; When the double-rotating floor brush is pushed forward, the control unit (3) controls the front rotating brush (11) and the rear rotating brush (21) to rotate forward. The rotation speed of the front rotating brush (11) is V1, and the rotation speed of the rear rotating brush (21) is V2, where V1 > V2 and V1 = V t ; when the double-rotating floor brush is pulled backward, the control unit (3) controls the front rotating brush (11) and the rear rotating brush (21) to rotate backward, where V1 < V2 and V2 = V t .

2. The double roller brush according to claim 1, characterized in that: The front roller brush unit (1) comprises a front roller brush (11) and a front roller brush motor (12), the front roller brush motor (12) is used to drive the front roller brush (11) to rotate, and the front roller brush motor (12) is connected to the control unit (3); The rear roller brush unit (2) comprises a rear roller brush (21) and a rear roller brush motor (22). The rear roller brush motor (22) is used to drive the rear roller brush (21) to rotate. The rear roller brush motor (22) is connected to the control unit (3).

3. The double roller floor brush according to claim 1, characterized in that: The rear roller (7) is arranged behind the roller brush housing (5) via a support plate (8); The front end of the support plate (8) is connected to the rear end surface of the roller brush housing (5); the rear roller (7) is arranged at the rear end of the side wall of the support plate (8), and the rear roller (7) does not contact the roller brush housing (5).

4. The double roller brush according to claim 3, characterized in that: The rear roller (7) comprises a wheel body (71), an axle body (72) and a sleeve (73); the sleeve (73) is connected to the support plate (8); one end of the axle body (72) is connected to the wheel body (71); the other end of the axle body (72) passes through the sleeve (73) and is rotatably connected to the support plate (8).

5. The double roller brush according to claim 4, characterized in that: The detection unit (4) is mounted on the inner wall of the sleeve (73) and is opposite to the outer wall of the shaft body (72).

6. A vacuum cleaner, characterized in that: It comprises a main body and a double-roller floor brush as claimed in any one of claims 1 to 5, wherein the main body is connected to the double-roller floor brush via a suction pipe (9).

7. A dust cleaning method, characterized in that: The double roller brush according to any one of claims 1 to 5 is used, comprising the following steps: Step 1: The detection unit (4) detects the running direction of the double roller brush in real time and transmits the generated signal to the control unit (3); Step 2: The control unit (3) analyzes the running direction of the double roller brushes according to the received signal and sends instructions to the front roller brush unit (1) and the rear roller brush unit (2) respectively; Step 3: When the double roller brushes are pushed forward, the control unit (3) controls the front roller brush (11) and the rear roller brush (21) to rotate forward, the rotation speed of the front roller brush (11) is V1, the rotation speed of the rear roller brush (21) is V2, and V1>V2; When the double roller brushes are dragged backward, the control unit (3) controls the front roller brush (11) and the rear roller brush (21) to rotate backward, and V1 <V2。

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