A method for starting a motor of a drum-type washing machine and a washing machine

Abstract

The application discloses a starting method of a motor of a drum washing machine and the drum washing machine. The method comprises the following steps: receiving a starting control signal of starting the motor, wherein the starting control signal at least comprises a starting rotating direction of the motor; and controlling the motor to rotate reversely by a first set angle according to the starting rotating direction; and starting the motor according to the starting control signal. The starting method of the motor of the drum washing machine can first control the motor to rotate reversely by a certain angle when starting the motor, so that the gravity center of the load is lifted by a certain height reversely; when rotating according to the starting rotating direction, the load gravity potential energy is utilized to drive the drum to rotate, the inertia effect is helpful to starting the motor, the load gravity potential energy is converted into the kinetic energy of the motor rotation, and the output power of the driver can be reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of clothes processing equipment, and particularly relates to a starting method of a motor of a drum washing machine and the washing machine. BACKGROUND

[0002] A washing machine is a kind of common household appliance, which provides great convenience for people. Among them, a drum washing machine drives clothes movement and realizes free falling through rotation of a drum, so as to perform washing.

[0003] A common motor starting mode is that an upper computer sends a certain speed, acceleration and other instructions to a driver to reach a specified speed, the driver directly starts running and maintains at the set speed.

[0004] When the drum washing machine has a large washing load, a large torque is required during starting. If the torque is insufficient, problems such as excessive heating of the motor and locked rotor may occur, which affects user experience and shortens the service life of the motor.

[0005] The above information disclosed in the background art is only used to increase the understanding of the background art of the present application, and therefore, it can include prior art known by those skilled in the art. SUMMARY

[0006] The present application proposes a starting method of a motor of a drum washing machine to solve the above problems.

[0007] To achieve the above application purposes, the present application adopts the following technical solutions:

[0008] A starting method of a motor of a drum washing machine, comprising the following steps:

[0009] Receiving a starting control signal for starting the motor, the starting control signal at least including a starting rotation direction of the motor;

[0010] The step of controlling the motor to rotate in the opposite direction includes: controlling the motor to rotate in the opposite direction of the starting rotation direction by a first set angle;

[0011] Starting the motor according to the starting control signal.

[0012] Further, before the step of controlling the motor to rotate in the opposite direction, the method further includes a step of releasing the clamping current of the motor, which releases the clamping control of the motor to the drum.

[0013] Further, the starting control signal for starting the motor further comprises a step of weighing the laundry, and when the weight of the laundry is not less than a set value, a step of controlling the motor to rotate in the reverse direction is performed, otherwise the step of controlling the motor to rotate in the reverse direction is not performed, and the motor is directly started according to the starting control signal.

[0014] Further, in the step of controlling the motor to rotate in the reverse direction, the reverse rotation speed of the motor is not greater than 60 rpm.

[0015] Further, the starting control signal further comprises a starting rotation speed and a washing rotation speed of the motor, and the starting rotation speed is 1.5 to 2 times the washing rotation speed.

[0016] Further, the greater the weight of the laundry, the greater the first set angle.

[0017] Further, after the step of starting the motor according to the starting control signal, a step of judging whether the motor is successfully started is further included, when the motor rotates in the starting rotation direction by a second set angle within a first set time t1, it is judged that the motor is successfully started, otherwise, it is judged that the motor is not successfully started, and the step of controlling the motor to rotate in the reverse direction is returned.

[0018] Further, when it is judged that the motor is successfully started, the rotation speed of the motor is adjusted to the washing rotation speed.

[0019] Further, the greater the weight of the laundry, the smaller the second set angle.

[0020] The present application further provides a washing machine comprising a drum, a motor for driving the drum to rotate, at least one memory and at least one processor.

[0021] The memory is used for storing a machine readable program.

[0022] The processor is used for calling the machine readable program, and performing the starting method as described in any one of the preceding steps to control the motor to start.

[0023] Compared with the prior art, the present application has the following advantages and positive effects:

[0024] The starting method of the motor of the drum washing machine can first control the motor to rotate in the reverse direction by a certain angle when starting the motor, the center of gravity of the load is lifted to a certain height in the reverse direction, and when rotating in the starting rotation direction, the gravitational potential energy of the load is used to drive the drum to rotate, which is helpful to the starting of the motor under the action of inertia, and the gravitational potential energy of the load is converted into kinetic energy of the motor rotation, which can reduce the output power of the driver.

[0025] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following embodiments are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0027] Figure 1 Figure 1 is a structural schematic diagram of an embodiment of the drum washing machine in the starting method of the motor of the drum washing machine proposed by the present application;

[0028] Figure 2 Figure 2 is a partial structural schematic diagram of the drum washing machine of Figure 1 ;

[0029] Figure 3 Figure 3 is a flow chart of an embodiment of the starting method of the motor of the drum washing machine proposed by the present application;

[0030] Figure 4 Figure 4 is a flow chart of a preferred embodiment of the starting method of the motor of the drum washing machine proposed by the present application. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0032] It should be noted that, in the description of the present application, the terms indicating the direction or position relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0034] In the description of the present application, it is necessary to point out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense and for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0036] Embodiment one

[0037] The present embodiment proposes a starting method of a motor of a drum washing machine, the drum washing machine used in the method is shown as follows, comprising a drum 1, a shell 6, the shell 6 is provided with an outer cylinder 2, the outer cylinder 2 is connected with the washing machine shell 6 through damping suspension springs and damping support rods respectively at the upper and lower parts, so as to realize the purpose that the outer cylinder 2 can be vibrated to be installed in the shell 6. Figure 1

[0038] The outer cylinder 2 is sleeved with the drum 1 arranged coaxially; the outer cylinder 2 and the drum 1 are respectively composed of a cylindrical outer cylinder peripheral side wall 201 and a drum peripheral side wall 101, corresponding ends of the same side of the outer cylinder 2 and the drum 1 are provided with relatively opened openings respectively to form a drum cylinder opening and an outer cylinder cylinder opening, and the other corresponding ends are both sealingly provided to form a drum bottom 102 and an outer cylinder bottom 202 respectively.

[0039] At the same time, the washing machine shell 1 is provided with an outwardly openable door body 3 at the front end, the door body 3 is hingedly connected with the shell 6 and can axially move relative to the shell 6.

[0040] The opening and closing of the door body 3 can achieve the opening or closing of the cylinder opening of the outer cylinder 2. When the door body 3 is closed, it can seal the cylinder opening of the outer cylinder 2. Thus, the effect that the drum 1 can relatively rotate around the shaft and form a closed water container during washing is realized.

[0041] The door body 3 comprises a door frame 31 and a glass bowl 32, the glass bowl 32 is sealingly fixed with the door frame 31, and the glass bowl 32 is recessed towards the drum 1.

[0042] ​The glass bowl 32 is made of light-transmitting glass, and the user can observe the washing condition of the laundry in the drum 1 through the glass bowl 32.

[0043] In this embodiment, a weighing module (not shown in the figure) is preferably further provided. When the laundry is washed by using the washing machine, the weighing module can automatically weigh the laundry in the washing machine, and then automatically select a preset washing program matched with the weight of the laundry obtained by weighing and a preset running rhythm matched with the preset washing program, so that the operation program of the washing machine and the running rhythm of the motor are automatically adapted to the weight of the laundry, the intelligent selection of the washing program of the washing machine is realized, the intelligence of the laundry washing of the washing machine is improved, the user does not need to worry about how to select the washing program, the operation is simple and convenient, the user experience is improved, and the washing effect can be further effectively optimized.

[0044] In this embodiment, the drum washing machine includes at least one memory and at least one processor (not shown in the figure), and a motor 4 for driving the drum 1 to rotate.

[0045] The memory is used for storing machine-readable programs, including control programs for controlling various execution devices to perform corresponding actions to complete processes such as laundry washing, rinsing, and spinning. The processor can also be used to call the machine-readable programs to control the start of the motor.

[0046] As shown in Figure 1 , the motor 4 is arranged between the outer drum bottom 202 and the outer shell 6. The motor 4 is fixed with the outer drum 2, and the motor shaft of the motor 4 penetrates through the outer drum bottom 202 and is fixed with the drum bottom 102. The axis direction of the motor 4 is arranged along the horizontal direction. The motor 4 is controlled by the control module to rotate clockwise or counterclockwise along the axis direction.

[0047] In order to improve the washing effect, as shown in Figure 2 , a lifting rib 5 is usually arranged on the inner wall of the drum 1. The lifting rib 5 extends along the axis direction of the drum 1.

[0048] The main function of the lifting rib 5 is that when the laundry is washed by the drum washing machine, on the one hand, the friction force between the laundry and the lifting rib 5 is generated, and the part of the laundry close to the lifting rib 5 rubs against the lifting rib 5 to generate a rubbing action; on the other hand, the lifting rib 5 can drive the laundry to rotate together, the laundry is lifted out of the liquid surface and sent to a certain height, and then falls into the washing liquid again due to the action of gravity, thereby generating a beating and falling action to improve the washing effect.

[0049] The washing control logic of the drum washing machine includes:

[0050] S11, starting, obtaining the weight information of the laundry and determining the amount of detergent to be added;

[0051] Specifically, the drum washing machine obtains the weight information of the laundry through the weighing module, which can be realized by a weight sensor arranged on the outer drum 2.

[0052] The weight of the laundry corresponds to the detergent dosage, and the detergent dosage is determined. In this embodiment, the corresponding detergent can be added according to the weight of the laundry, which improves the utilization rate of the detergent and the washing effect of the drum washing machine.

[0053] Alternatively, the washing information of the laundry is obtained in step S11 to determine the detergent dosage. The washing information includes the load information of the laundry, and / or the category information of the laundry, and / or the material information of the laundry, and / or the category information of the laundry, and / or the type information of the stains on the laundry. The washing effect of the drum washing machine can be further improved.

[0054] S12, start the detergent pump and the water inlet valve, and add the detergent and water into the drum 1.

[0055] Specifically, the detergent pump is started to add the detergent in the drum 1 into the drum 1 through the detergent pipe. The weight sensor for weighing the detergent can also be arranged in the outer drum 2. The total weight of the detergent is detected by the weight sensor to determine the dosage of the detergent. Alternatively, the working parameters of the detergent pump are obtained to calculate the dosage of the detergent, wherein the working parameters of the detergent pump correspond to the dosage of the detergent.

[0056] At the same time, the water inlet valve is started in step S12, and the water dosage is determined according to the dosage of the detergent. Alternatively, the water inlet valve is started in step S12, and the water inlet time of the water inlet pump is determined according to the dosage of the detergent.

[0057] Therefore, in step S12, the detergent pump is started, and the detergent is added to the second cavity 24 to the confirmed dosage of the detergent, and then the detergent pump is closed.

[0058] S13, rotate the washing drum to drive the laundry in the washing drum to overturn in the washing drum, so that the high-concentration mixed solution can directly contact the laundry and the stains, which is beneficial to decompose the stains. Thus, the utilization rate of the detergent and the washing effect of the drum washing machine 1 are improved.

[0059] After the water is added into the drum 1 for a set time, the water inlet valve is closed.

[0060] S14, execute the washing program.

[0061] S15, execute the rinsing program.

[0062] The steps S13, S14 and S15 all need to start the motor, and when the drum washing machine has a large washing load, a large torque is needed at the start, and if the torque is insufficient, problems such as excessive heating of the motor and locked-rotor may occur, affecting the user experience and shortening the service life of the motor.

[0063] To solve the technical problem of starting the drum washing machine with a large load, the drum washing machine motor starting method of the embodiment shown in Figure 3 The drum washing machine motor starting method of the embodiment includes the following steps:

[0064] The starting control signal for starting the motor is received, and the starting control signal at least includes the starting rotation direction of the motor;

[0065] The step of controlling the motor to rotate in the opposite direction includes: controlling the motor to rotate in the opposite direction of the starting rotation direction by a first set angle.

[0066] The motor is started according to the starting control signal.

[0067] The motor 4 drives the drum 1 to rotate in the opposite direction of the starting rotation direction, and under the action of the friction force of the lifting ribs 5, the clothes in the drum 1 are lifted to a certain height in the opposite direction. At this time, the motor is controlled to rotate according to the starting control signal, that is, to rotate in the starting rotation direction. Since the center of gravity of the clothes deviates from the vertical central axis at this time and is located on the side opposite to the starting rotation direction of the vertical central axis, after receiving the starting rotation direction rotation signal, the center of gravity of the clothes will first be lowered to the lowest point, at which time the center of gravity is located on the vertical central axis, and then continue to rotate in the starting rotation direction, and the center of gravity is lifted on the side consistent with the starting rotation direction. When the center of gravity of the clothes is lowered to the lowest point, the gravitational potential energy of the clothes is converted into kinetic energy, which gives the drum 1 a certain acceleration for keeping rotating in the starting rotation direction under the action of inertia, and is superimposed with the driving torque of the motor, thereby helping to start the motor. At the same time, the gravitational potential energy of the load is converted into kinetic energy for the rotation of the motor, which can reduce the output power of the motor driver.

[0068] The starting rotation direction can be clockwise rotation or counterclockwise rotation, which is determined according to the system definition.

[0069] During the rotation of the motor 4, in order to facilitate and accurately control the rotation angle, a clamping current is generally output to the motor 4 when the motor 4 is stationary, so as to keep the current position as the starting position for controlling the rotation.

[0070] After the clothes are put into the drum 1, especially after the clothes are absorbed water, the center of gravity of the clothes may not be at the lowest position, and therefore, in order to effectively lift the center of gravity of the clothes in the opposite direction in the step of controlling the motor 4 to rotate in the opposite direction, the drum washing machine of the embodiment shown in Figure 4As shown, the embodiment preferably further comprises a step of releasing the motor clamping current before the step of controlling the motor 4 to rotate in the reverse direction, so as to release the clamping control of the motor 4 on the drum 1, and allow the drum 1 to rotate naturally under the action of the weight of the laundry, so as to lower the gravity center to the lowest point.

[0071] The starting method of the motor of the drum washing machine is particularly suitable for large load starting, so as to solve the problem of starting failure or motor stall caused by insufficient driving torque when the load is large. When the load is small, the motor can be started according to the conventional starting method.

[0072] Therefore, the method further comprises a weighing step after receiving the starting control signal of the motor, so as to obtain the weight of the laundry. When the weight of the laundry is not less than a set value, the step of controlling the motor to rotate in the reverse direction is performed, otherwise the step of controlling the motor to rotate in the reverse direction is not performed, and the motor is directly started according to the starting control signal. The set value can be set according to the actual power of the drum washing machine.

[0073] In the step of controlling the motor to rotate in the reverse direction, the motor rotates in the reverse direction of the starting rotation direction by a first set angle. The first set angle is in the range of 0° to 90°.

[0074] The first set angle can be set according to the weight of the load. That is, the greater the weight of the laundry, the greater the first set angle. The greater the first set angle, the higher the height of the laundry lifted in the reverse direction, and the greater the gravitational potential energy converted when rotating in the starting direction, which is more helpful for starting the motor.

[0075] In the step of controlling the motor to rotate in the reverse direction, the reverse rotation speed of the motor is not greater than 60 rpm (rpm, revolutions per minute). When the drum washing machine needs to rotate, a certain rotation speed, such as 50 rpm, is received in the forward direction.

[0076] If the reverse rotation by the first set angle is completed within a certain time, or if the first set angle cannot be reached within a limited time, it is determined whether the clamping current output according to the weight of the load can keep the inner drum from rotating. If the clamping current can keep the inner drum from rotating, it is considered that the lifting in the reverse direction fails, and the step of controlling the motor to rotate in the reverse direction is performed again.

[0077] If the clamping current cannot keep the inner drum from rotating, it is considered that the gravity center of the laundry has been lifted, and a command is sent to the driver to rotate in the starting rotation direction of the motor.

[0078] The starting control signal further comprises a starting rotation speed and a washing rotation speed of the motor.

[0079] The starting rotation speed in the embodiment = the washing rotation speed * a coefficient, which is set according to different load weights. The greater the load, the greater the coefficient, which can be between 1.5 and 2.0.

[0080] The driver utilizes PID control, and the greater the difference between the 0 rotation speed and the starting rotation speed, the greater the force that can be output. When the inner drum rotation does not exceed 90 degrees, the speed has reached, and the output torque must be reduced, which is not conducive to the starting of the motor. In the embodiment, the starting rotation speed is set to be greater than the washing rotation speed, and a greater starting rotation speed is set, so that greater output torque of the driver can be obtained, which is conducive to the smooth starting of the motor.

[0081] The starting rotation speed is calculated by the above formula to be between 75 rpm and 100 rpm.

[0082] When the motor 4 drives the drum 1 to rotate by a certain angle, the gravity of the clothes lifted by the drum 1 is greater than the component of the friction in the vertical direction, and the clothes begin to fall, at which time the load of the motor is reduced, and it can be more easily overcome the critical point of 90 degrees, and it can be basically determined that it can be started. Therefore, in the present scheme, whether the starting is successful is determined by detecting the rotation angle of the motor in the rotation direction.

[0083] Based on this, the embodiment further includes a step of judging whether the motor is started successfully after the step of starting the motor according to the starting control signal. When the motor rotates by a second set angle in the starting rotation direction within a first set time t1, it is judged that the starting is successful, otherwise, it is judged that the starting is not successful, and the step of controlling the motor to rotate in the reverse direction is returned to.

[0084] If the second set angle can be set to 120°-180°, then the processor sends an instruction to the driver to rotate in the starting rotation direction, and the rotation speed can be 50 rpm. If the rotation angle cannot reach the second set angle, then the reverse rotation of 60°-90° is tried again, and the cycle is executed.

[0085] If the attempt is more than 5 times, then the present starting fails, and the motor is not started again. The next time the starting is needed, the attempt is tried again.

[0086] Because the starting rotation speed is set to be large, the large rotation speed is not needed during normal washing. Therefore, when it is judged that the motor is started successfully, the rotation speed of the motor is adjusted to the washing rotation speed, and the washing rotation speed of the normal washing mode is executed.

[0087] The second set angle can be set according to the load weight. The greater the weight of the clothes, the smaller the angle at which the clothes begin to fall when lifted, and the smaller the second set angle.

[0088] Embodiment Two

[0089] The present embodiment proposes a drum washing machine, such asFigure 1 、 Figure 2 As shown in the figure, the washing machine comprises a drum 1 and a housing 6, and the housing 6 is internally provided with an outer cylinder 2.

[0090] The drum 1 is coaxially arranged in the outer cylinder 2; the outer cylinder 2 and the drum 1 are respectively formed by a cylindrical outer cylinder peripheral wall 201 and a cylindrical drum peripheral wall 101, and the same side of the outer cylinder 2 and the drum 1 is provided with a corresponding opening, so as to respectively form a drum opening and an outer cylinder opening, and the other side of the outer cylinder 2 and the drum 1 is both provided with a corresponding sealing end, so as to respectively form a drum bottom 102 and an outer cylinder bottom 202.

[0091] Meanwhile, the front end of the washing machine housing 1 is provided with an outwardly open door 3, and the door 3 is hingedly connected with the housing 6 and can axially move relative to the housing 6.

[0092] The opening and closing of the door 3 can achieve the opening or closing of the outer cylinder opening corresponding to the drum 1. When the door 3 is closed, it can seal the outer cylinder opening of the drum 1. Thus, the drum 1 can be installed in the outer cylinder 2 to rotate relative to the shaft and form a closed water container during washing.

[0093] The door 3 comprises a door frame 31 and a glass bowl 32, and the glass bowl 32 is sealingly fixed with the door frame 31 and recessed towards the drum 1.

[0094] The glass bowl 32 is made of light-transmitting glass, and the user can observe the washing condition of the clothes in the drum 1 through the glass bowl 32.

[0095] In this embodiment, a weighing module (not shown in the figure) is preferably further provided, and when the clothes are washed by using the washing machine, the weighing module can automatically weigh the clothes in the washing machine, and then automatically select a preset washing program matched with the weight of the clothes and a preset running rhythm matched with the preset washing program, so that the operation program of the washing machine and the running rhythm of the motor are automatically adapted to the weight of the clothes, the intelligent selection of the washing program of the washing machine is realized, the intelligence of the washing clothes by the washing machine is improved, the user does not need to worry about how to select the washing program, the operation is simple and convenient, the user experience is improved, and the washing effect can be further optimized.

[0096] In this embodiment, the drum washing machine comprises at least one memory and at least one processor (not shown in the figure), and a motor 4 for driving the drum 1 to rotate.

[0097] The memory is used for storing machine readable programs, including control programs for controlling various execution devices to perform corresponding actions and complete processes such as washing, rinsing and spinning. The processor can also be used to call the machine readable programs and control the start of the motor.

[0098] As Figure 1As shown, the motor 4 is arranged between the outer drum bottom 202 and the outer shell 6, and the motor 4 is fixed with the outer drum 2, and the motor shaft of the motor 4 penetrates the outer drum bottom 202 and is fixed with the drum bottom 102. The axial direction of the motor 4 is arranged along the horizontal direction, and the motor 4 is controlled by the control module to rotate clockwise or counterclockwise along the axial direction.

[0099] In order to improve the washing effect, such as Figure 2 As shown, the lifting ribs 5 are usually arranged on the inner wall of the drum 1. The lifting ribs 5 extend along the axial direction of the drum 1.

[0100] The main function of the lifting ribs 5 is that, during the washing of the laundry in the drum washing machine, on the one hand, the friction force is generated between the laundry and the lifting ribs 5, and the part of the laundry close to the lifting ribs 5 rubs against the lifting ribs 5 to generate the rubbing action; on the other hand, the lifting ribs 5 can drive the laundry to rotate together, the laundry is lifted out of the liquid surface and sent to a certain height, and then falls into the washing liquid again due to the gravity to generate the beating and falling action, thereby improving the washing effect.

[0101] The washing control logic of the drum washing machine and the starting method of the motor of the drum washing machine can be referred to the description in Embodiment One, and will not be repeated here.

[0102] The drum washing machine of the embodiment can be a large-capacity washing machine, which meets the more laundry washing needs of users.

[0103] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. A method of starting a motor of a drum washing machine, characterized in that, The method comprises the following steps: receiving a start control signal for starting the motor, the start control signal comprising at least a start rotating direction of the motor; the step of controlling the motor to rotate reversely comprises: controlling the motor to rotate reversely by a first set angle; starting the motor according to the start control signal; before the step of controlling the motor to rotate reversely, the method further comprises the step of releasing the clamping current of the motor, and releasing the clamping control of the drum by the motor, so that the drum rotates naturally under the action of the gravity of the laundry, and the gravity center drops to the lowest point; after receiving the start control signal for starting the motor, the method further comprises the step of weighing, to obtain the weight of the laundry; when the weight of the laundry is not less than a set value, the step of controlling the motor to rotate reversely is executed, otherwise, the step of controlling the motor to rotate reversely is not executed, and the motor is started according to the start control signal; after the step of starting the motor according to the start control signal, the method further comprises the step of judging whether the motor is started successfully; when the motor rotates by a second set angle in a start rotating direction within a first set time t1, it is judged that the motor is started successfully, otherwise, it is judged that the motor is not started successfully, and the step of controlling the motor to rotate reversely is returned.

2. The method for starting the motor of a drum washing machine according to claim 1, characterized in that, In the step of controlling the motor to rotate reversely, the reverse rotating speed of the motor is not greater than 60 rpm.

3. The method of starting a motor of a drum washing machine according to claim 1, characterized in that, The start control signal further comprises a start rotating speed and a washing rotating speed of the motor, and the start rotating speed is 1.5 times to 2 times of the washing rotating speed.

4. The method of starting a motor of a drum washing machine according to claim 1, characterized in that, The greater the weight of the laundry is, the greater the first set angle is.

5. A method of starting a motor of a drum washing machine according to claim 4, characterized in that, When it is judged that the motor is started successfully, the rotating speed of the motor is adjusted to the washing rotating speed.

6. The method of starting a motor of a drum washing machine according to claim 4, characterized in that, The greater the weight of the laundry is, the smaller the second set angle is. 7.A washing machine comprising a drum, a motor for driving the drum to rotate, at least one memory and at least one processor, characterized in that, the memory is used for storing a machine readable program; the processor is used for calling the machine readable program, and executing the method according to any one of claims 1 to 6 to control starting the motor.

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