A method for controlling a washing machine

Abstract

The present invention provides a control method for a washing machine, the washing machine comprising: a housing; an inner drum, arranged in the housing, and having a washing chamber for independently holding washing water; the detection component is arranged on the inner drum, the position of the detection component can be raised / lowered as the water level rises / lowers, and the sensing component detects the position change of the detection component accordingly; the control method comprises: during the water inlet process of the washing machine, the inner drum is positioned to a position relative to the detection component and the sensing component, and the washing machine detects the position of the detection component by the sensing component to obtain the water level in the inner drum. The control method of the washing machine of the present invention realizes the water level detection of the inner drum without holes by controlling the positioning of the inner drum and cooperating with the water level detection device during the water inlet process, and the water level detection is accurate, simple, effective, stable and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of laundry equipment, and in particular to a control method for a washing machine. Background Art

[0002] As one of the most widely used household appliances in people's daily lives, washing machines help people get rid of the trouble of washing clothes and bring great convenience to people. However, existing washing machines generally include an inner drum and an outer drum, and multiple dehydration holes are distributed on the wall of the inner drum. During the washing process, the washing water between the inner drum and the outer drum will not be used, resulting in a waste of this part of the washing water. In addition, the dirt generated during the washing process will flow into the space between the inner drum and the outer drum and be accumulated. With long-term use, the accumulation of dirt will affect the washing effect and reduce the user experience.

[0003] In order to solve the above problems, some patents have been proposed, such as the Chinese invention patent with application number 201410215346.3, entitled "A drum washing machine", which relates to a drum washing machine, including a housing, an inner drum and an outer drum are arranged in the housing, a door seal is arranged between the outer drum and the housing, the inner drum is connected to a driving device, the inner drum is a holeless inner drum, and the inner drum is a conical drum with a small diameter at the bottom and a large diameter at the mouth, the mouth of the inner drum is curved inward, a water inlet conduit is arranged on the door seal, one end of the water inlet conduit is connected to the washing water rapid heating device, and the other end of the water inlet conduit passes through the door seal and extends into the inner drum, and a drain port and a water pressure detection device are arranged on the outer drum. It can be seen from the above technical scheme that the inner drum of the invention is a holeless inner drum, water is fed into the inner drum through the water inlet conduit arranged on the door seal, and water is drained during the dehydration process through the shape of the inner drum itself, so that water can be avoided between the inner and outer drums, which greatly saves the amount of washing water.

[0004] The above invention provides a drum washing machine with a hole-free inner drum. During the washing process, the washing water is contained in the inner drum, and there is no water in the outer drum, which solves the problems of water waste between the inner drum and the outer drum and dirt accumulation between the inner drum and the outer drum. However, the existing washing machine sets a water level sensor on the outer drum to detect the water level in the outer drum to control the water inlet process, which is no longer applicable.

[0005] In view of this, the present invention is proposed to solve the problem of water level detection in a washing machine with a non-porous inner drum. Summary of the invention

[0006] In order to solve the above problems, the present invention aims to provide a control method for solving the water level detection problem of a non-porous inner drum washing machine. Specifically, the following technical solutions are adopted:

[0007] A control method for a washing machine, the washing machine comprising: a housing; an inner drum, arranged in the housing, having a washing chamber for independently holding washing water; the detection component is arranged on the inner drum, the position of the detection component can be raised / lowered as the water level rises / lowers, and the sensing component detects the position change of the detection component accordingly; the control method comprises:

[0008] During the water intake process of the washing machine, the inner drum is positioned to a position where the detection component and the sensing component are relative to each other, and the washing machine detects the position of the detection component through the sensing component to obtain the water level in the inner drum.

[0009] Furthermore, during the water intake process of the washing machine, the driving motor is controlled to drive the inner drum to rotate and perform a rotation process. After the rotation process is completed, the driving motor is controlled to stop at a fixed position to position the inner drum to a position relative to the detection component and the sensing component.

[0010] Furthermore, during the water intake process of the washing machine, the driving motor is controlled to drive the inner drum to perform a rotation process at intervals. After each rotation process, the driving motor is controlled to stop at a fixed position to position the inner drum to a position where the detection component is relative to the sensing component. The washing machine detects the position of the detection component through the sensing component to obtain the water level in the inner drum. When the water level in the inner drum reaches the set value, the water-saving process ends. When the water level in the inner drum does not reach the set value, water continues to be taken in and the rotation process is performed.

[0011] Furthermore, when the current water level value in the inner drum obtained by the washing machine is ≥ 4 / 5 of the set water level value, the driving motor is controlled to stop driving the inner drum to perform the rotation process, and the washing machine keeps the inner drum positioned at the relative position between the detection component and the sensing component until the water level in the inner drum reaches the set water level, and then the washing machine releases the positioning of the inner drum.

[0012] Furthermore, a positioning device is provided on the outer drum of the washing machine, the positioning device has a retractable positioning column, and the inner drum has a positioning hole for cooperating with the positioning column;

[0013] During the water intake process of the washing machine, the positioning column of the positioning device is controlled to extend and cooperate with the positioning hole to lock the inner drum, and the detection component and the sensing component are in relative positions.

[0014] Furthermore, when the washing machine is started, the washing machine weighs the clothes in the inner drum before water starts to be filled, and sets the water level of the water filling process according to the weight of the clothes.

[0015] As an embodiment of the present invention, the detection component is a magnetic float with magnetism arranged in the inner drum, the sensing component is a magnetic field sensing device, and the control method includes: during the water intake process of the washing machine, the washing machine detects the position of the magnetic float through the magnetic field sensing device to obtain the water level in the inner drum.

[0016] Furthermore, the magnetic field sensing device is a Hall sensor, and the control method includes: during the water intake process of the washing machine, the induced current of the Hall sensor changes with the height of the magnetic float, and the washing machine obtains the water level in the inner drum according to the change of the induced current of the Hall sensor.

[0017] Furthermore, the magnetic field sensing device is a reed switch, and the reed switch includes a plurality of reed switches, the path of the reed switch arranged outside the inner cylinder corresponds to the up and down floating path of the magnetic float inside the inner cylinder, and the plurality of reed switches are electrically connected to the main control board respectively; the control method includes:

[0018] When the washing machine is filled with water, the magnetic float rises with the water level. When the magnetic float rises, the reed switch corresponding to the height position of the magnetic float closes. The washing machine obtains the water level in the inner drum based on the closing signal of the reed switch at each position.

[0019] As another embodiment of the present invention, a light-emitting device is arranged in the inner drum, and a light-transmitting portion is provided on the wall of the inner drum for light emitted by the light-emitting device to pass through. The detection component is a float arranged in the inner drum and floating up and down along the light-transmitting portion. The sensing component is a light sensing device. The control method comprises: during the water intake process of the washing machine, as the water level in the inner drum changes, the float floats along the light-transmitting portion to change the light emitted by the light-transmitting portion, and the washing machine detects the light change through the magnetic field sensing device to obtain the water level in the inner drum.

[0020] The present invention provides a washing machine which does not need to fill washing / rinsing water between an inner drum and an outer drum, thereby avoiding the possibility of dirt adhering between the inner drum and the outer drum, avoiding the inner drum and the outer drum from getting dirty, improving user health and user experience; and reducing the amount of washing water used in the washing machine, thereby saving water consumption.

[0021] The water level detection device of the present invention is aimed at the structural characteristics of a washing machine with a non-porous inner drum. The position of the detection component arranged in the inner drum can change with the change of the water level. The sensing component is arranged outside the inner drum to detect the position change of the detection component. The sensing component obtains the water level height in the inner drum by detecting the position of the detection component, thereby realizing the water level detection in the inner drum. The water level detection device of the present invention solves the problem of water level detection in a washing machine with a non-porous inner drum, has a simple structure, high detection accuracy, and has broad market prospects.

[0022] The control method of the washing machine of the present invention realizes water level detection of the hole-free inner drum by controlling the positioning of the inner drum in cooperation with the water level detection device during the water inlet process. The water level detection is accurate, simple, effective, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A front view of a washing machine according to an embodiment of the present invention;

[0024] Figure 2 The washing machine of the present invention Figure 1 Sectional view of plane XX;

[0025] Figure 3 Washing machine according to the present invention Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 A flowchart of a method for controlling a washing machine according to an embodiment of the present invention;

[0027] Figure 5 Flowchart of a control method for a washing machine according to an embodiment of the present invention.

[0028] Explanation of the numbers in the accompanying drawings: 1-shell 2-door 3-main controller 4-outer cylinder 5-inner cylinder 6-lifting rib 7-detection component 8-sensing component 9-base 10-conical structure 11-drain pipe 12-water inlet valve 13-drainage device 14-inner cylinder door 15-sealed cabin structure 16-detergent delivery box 17-upper table panel 18-hollow channel 19-inner cylinder shaft 20-driving motor 21-side wall 22-float shell 23-guide rod 24-bottom wall 25-connecting port 26-air pressure balance mechanism. DETAILED DESCRIPTION

[0029] A control method for a washing machine of the present invention is described in detail below with reference to the accompanying drawings:

[0030] like Figure 1-3 As shown, a washing machine of this embodiment includes:

[0031] Shell 1;

[0032] The inner drum 5 is arranged in the housing 1 and has a washing chamber for independently containing washing water;

[0033] And a water level detection device, the water level detection device includes a detection component 7 and a sensing component 8, the detection component 7 is arranged on the inner tube 5, the position of the detection component 7 can be increased / decreased as the water level increases / decreases, and the sensing component 8 detects the position change of the detection component 7 accordingly; the sensing component 8 obtains the water level height in the inner tube 5 by detecting the position of the detection part 7.

[0034] The present embodiment provides a washing machine that does not need to fill washing / rinsing water between the inner drum and the outer drum, which not only avoids the possibility of dirt adhesion between the inner drum and the outer drum, and avoids the inner drum and the outer drum from getting dirty, thereby improving user health and user experience; but also reduces the amount of washing water used in the washing machine, saving water consumption.

[0035] The water level detection device of this embodiment is aimed at the structural characteristics of a washing machine with a non-porous inner drum. The position of the detection component 7 arranged in the inner drum 5 can change with the change of the water level. The sensing component 8 is arranged outside the inner drum 5 to detect the position change of the detection component 7. The sensing component 8 obtains the water level height in the inner drum 5 by detecting the position of the detection part 7, thereby realizing water level detection in the inner drum.

[0036] The detection component 7 of this embodiment utilizes the physical properties of water and changes its position as the water level changes. The detection component 7 does not need to be powered on, which solves the problem that the structural components in the holeless inner drum cannot be powered. The sensing component 8 can indirectly detect the water level in the inner drum by detecting the detection component 7. The sensing component 8 is arranged on the outside of the inner drum, and can be arranged on a fixed component, on the outer drum, or in the shell. This does not affect the power supply to the sensing component 8 and the exchange of data and control signals between the sensing component 8 and the main controller 8 of the washing machine.

[0037] The inner drum 5 of this embodiment is a hole-free inner drum with a closed drum wall. An inner drum door 14 is arranged on the drum mouth of the inner drum to form an independent sealed cabin structure 15, which prevents the possibility of clothes in the inner drum 5 coming out, and prevents the clothes from being pressed or hit to cause water to flow out of the inner drum or splash out, thereby avoiding the possibility of dirt adhesion between the inner and outer drums, and truly realizing that there is no water between the inner and outer drums.

[0038] Since the drum dehydration speed can reach 1600 rpm, a safety accident will occur if the inner drum door on the inner drum is not locked properly. The washing machine of this embodiment has a door lock detection device that ensures that the inner drum door is locked in place, ensuring that the locking judgment accuracy is 100%, greatly improving the safety of the machine, user health and user experience.

[0039] As an implementation mode of this embodiment, the detection component 7 described in this embodiment is a magnetic float with magnetism arranged in the inner tube 5, and the sensing component 8 is a magnetic field sensing device. The magnetic field sensing device obtains the water level height in the inner tube by detecting the height change of the magnetic float.

[0040] This embodiment solves the problem of water level detection of a non-porous inner drum washing machine by using a magnetic field sensing device to sense a magnetic float, and has a simple structure and high detection accuracy.

[0041] Furthermore, in order to solve the installation problem of the magnetic float, a float shell 22 is arranged in the inner cylinder 5 described in this embodiment, and a float chamber connected to the inner cylinder is formed between the float shell 22 and the cylinder wall of the inner cylinder 5. The magnetic float is arranged in the float chamber and can float up and down with the change of water level.

[0042] Specifically, the float housing 22 described in this embodiment is installed on the bottom wall 24 of the inner cylinder 5, and a float chamber extending radially along the bottom wall 24 of the inner cylinder 5 is formed between the float housing 22 and the bottom wall 24. The float housing 22 is provided with a communication port 25 connected to the interior of the inner cylinder at one end of the peripheral side wall 21 of the inner cylinder 5.

[0043] In this embodiment, the float housing 22 is arranged on the bottom wall 24 of the inner drum 5, and does not occupy the middle space of the inner drum 5, and has no effect on the laundry washing process. A float chamber extending radially along the bottom wall 24 of the inner drum 5 is formed between the float housing 22 and the bottom wall 24, so that the float chamber can be arranged in the vertical direction to measure the water level by positioning the inner drum 5.

[0044] In order to better guide the magnetic float to slide up and down, improve detection accuracy, and ensure that the magnetic float is within the detection range of the magnetic field detection device, a guide structure for guiding the magnetic float to float up and down is provided in the float housing described in this embodiment.

[0045] Preferably, the guide structure is a guide rod 23 arranged inside the float housing, the magnetic float has a through channel inside, the guide rod 23 passes through the through channel of the magnetic float, and the magnetic float can float up and down along the guide rod.

[0046] As an implementation mode of this embodiment, the washing machine of this embodiment includes a main controller 3, and the magnetic field sensing device is a Hall sensor, which is electrically connected to the main controller 3; the induced current of the Hall sensor changes with the height of the magnetic float, and the main controller 3 obtains the water level height in the inner drum according to the change of the induced current of the Hall sensor.

[0047] As another implementation of this embodiment, the washing machine of this embodiment includes a main controller 3, the magnetic field sensing device is a reed switch, and the reed switch includes multiple reed switches. The path of the reed switch arranged outside the inner drum corresponds to the up and down floating path of the magnetic float inside the inner drum, and the multiple reed switches are electrically connected to the main controller 3 respectively: as the height of the magnetic float changes, the reed switch corresponding to the height position of the magnetic float closes, and the main controller 3 obtains the water level height in the inner drum according to the closing signal of the reed switch at each position.

[0048] Preferably, each of the reed switches corresponds to a settable water level height setting of the washing machine. During the water filling process of the washing machine, when the reed switch corresponding to the set water level is closed, the main control board determines that the water has filled in to the set water level.

[0049] Furthermore, the washing machine of this embodiment includes an outer drum 4 , and the magnetic field sensing device is arranged on the outer drum 4 ; preferably, the magnetic field sensing device is arranged on the bottom wall of the outer drum 4 .

[0050] Since the inner drum rotates during the washing process, but when detecting the water level in the inner drum, the float chamber where the electromagnetic float is located needs to be set vertically, therefore, the inner drum needs to be positioned to a certain position when performing water level detection. In order to achieve this purpose of the invention, a positioning device is provided on the outer drum 4 described in this embodiment, and the positioning device has a retractable positioning column, and the inner drum 5 has a positioning hole for cooperating with the positioning column; when the positioning column of the positioning device is extended to cooperate with the positioning hole to lock the inner drum, the magnetic field sensing device and the magnetic float are in a relative position, and the float chamber is in a vertical position.

[0051] In addition, the inner drum 5 can also be locked at a certain position by the driving motor of the washing machine.

[0052] This embodiment also provides another solution for water level detection of a hole-free inner cylinder. In this embodiment, a light-emitting device is arranged in the inner cylinder 5, and a light-transmitting portion is provided on the cylinder wall of the inner cylinder 5 for the light-emitting device to emit light through. The detection component 7 is a float arranged in the inner cylinder 5 and floating up and down along the light-transmitting portion, and the sensing component is a light sensing device:

[0053] As the water level in the inner cylinder changes, the float floats along the light-transmitting portion to change the light emitted by the light-transmitting portion, and the magnetic field sensing device obtains the water level in the inner cylinder by detecting the light change.

[0054] The light emitting device in the above manner can be powered by a battery and sealed at the same time.

[0055] The washing machine of this embodiment adopts a structure of a non-porous inner drum. In order to achieve drainage of the non-porous inner drum, a drainage hole is opened on the side wall of the inner drum of this embodiment, and a centrifugal drainage mechanism 10 is installed on the drainage hole. The centrifugal drainage mechanism 10 keeps the drainage hole in a normally closed state to form a non-porous inner drum, which independently holds washing water. When drainage is required, the inner drum is controlled to rotate at a high speed, and the centrifugal mechanism 10 opens the drainage hole under the centrifugal effect of the high-speed rotation, and the washing water is discharged from the drainage hole. Preferably, a plurality of lifting ribs 6 are arranged on the wall of the inner drum 5, and the centrifugal drainage mechanism 10 is arranged in the inner chamber of at least one lifting rib 6.

[0056] In order to improve the drainage efficiency of the inner cylinder 5, the centrifugal drainage mechanism 10 of the present embodiment is arranged in the middle part of the peripheral wall of the inner cylinder, and the peripheral wall of the inner cylinder presents a conical structure 10 with an inner diameter gradually increasing from the inner cylinder mouth to the centrifugal drainage mechanism 10, and presents a conical structure with an inner diameter gradually increasing from the bottom wall of the inner cylinder to the centrifugal drainage mechanism 10, thereby forming an inner cylinder structure with small ends and large middle. In this way, during high-speed centrifugal drainage, the water in the inner cylinder can be better guided through the conical structure to the middle centrifugal drainage structure 10 for discharge.

[0057] The bottom of the outer cylinder 4 of this embodiment is connected to a drainage device 13 , and the drainage device 13 is connected to a drainage pipe 11 for leading water out of the shell 1 .

[0058] The laundry machine of this embodiment has a casing 1, and the casing 1 includes: an upper panel 17, a front panel, a back panel and a bottom panel. A foot 9 is fixedly mounted on the bottom panel for supporting the entire washing machine, and a machine door 2 is mounted on the front panel. The casing 1 has an outer drum 4 inside, and an inner drum 5 is coaxially arranged inside the outer drum 4. The main purpose of the outer drum 4 is to collect the drainage of the inner drum 5 and the drainage of the high-speed centrifugal dehydration of the inner drum 5. The inner drum 5 rotates, and preferably, a lifting rib 6 is provided to continuously lift, drop and beat the clothes so as to clean the clothes. The inner drum 5 is a non-porous structure, and the outer drum 4 has a central mounting hole, and a bearing is fixedly mounted. The inner drum shaft 19, which is tightly connected to the inner drum 5, passes through the bearing shown and is connected to the drive motor 20.

[0059] In order to realize water inflow into the hole-free inner drum of this embodiment, the driving motor 19 of the washing machine of this embodiment is fixedly connected to the inner drum 5 through the inner drum shaft 19 to drive the inner drum 5 to rotate. The inner drum shaft 19 has a hollow passage 18 connected to the inside of the inner drum 5, and the water inlet pipeline of the washing machine is connected to the hollow passage 18 of the inner drum shaft 19. The water inlet end of the water inlet pipeline extends out of the housing 1 of the washing machine to connect to the faucet, and the water inlet pipeline is connected to the water inlet valve 13, the detergent delivery device 16 and the hollow passage 18 of the inner drum shaft 19 in sequence.

[0060] The inner cylinder 5 of this embodiment is provided with an air pressure balancing mechanism for connecting the inner cylinder 5 with the external environment to balance the air pressure inside the inner cylinder.

[0061] When water enters, the gas in the sealed compartment of the inner tube is pressurized and can overflow through the balancing mechanism to ensure air pressure balance.

[0062] When the water supply is suddenly cut off, the external atmosphere can quickly enter the sealed compartment of the inner drum and destroy the back suction, ensuring the air pressure balance and preventing the washing water from being sucked into the tap water network.

[0063] In other cases, such as dehydration, the air pressure balance mechanism can also ensure the air pressure balance in the inner drum.

[0064] As an implementation of this embodiment, the air pressure balance mechanism includes a pressure equalizing channel 26 opened on the inner cylinder shaft 19 to connect the inner cylinder 5 with the external environment, and the highest water level in the inner cylinder 5 is lower than the inner cylinder shaft. This can prevent the water in the inner cylinder 5 from flowing out of the pressure equalizing channel 26.

[0065] The pressure equalizing channel 26 in this embodiment includes a first channel section and a second channel section, wherein the first channel section is arranged parallel to the hollow channel, and one end of the first channel section is connected to the interior of the inner cylinder, and one end of the second channel section is connected to the first channel section, and the other end extends to the outer peripheral wall of the inner cylinder shaft and is connected to the interior of the outer cylinder. Preferably, the second channel section is arranged perpendicular to the first channel section to form an L-shaped pressure equalizing channel.

[0066] like Figure 4 and Figure 5 As shown, a control method of a washing machine of this embodiment, the washing machine comprises: a housing; an inner drum, which is arranged in the housing and has a washing chamber for independently holding washing water; and a water level detection device, the water level detection device comprises a detection component and a sensing component, the position of the detection component arranged in the inner drum can change with the change of water level, and the sensing component is arranged outside the inner drum to detect the position change of the detection component; the control method comprises:

[0067] During the water intake process of the washing machine, the inner drum is positioned to a position where the detection component and the sensing component are relative to each other, and the washing machine detects the position of the detection component through the sensing component to obtain the water level in the inner drum.

[0068] The control method of this embodiment realizes water level detection of the hole-free inner cylinder by controlling the positioning of the inner cylinder and cooperating with the water level detection device during the water inlet process. It has a simple structure, high detection accuracy, and broad market promotion value.

[0069] As an implementation method of this embodiment, during the water inlet process of the washing machine, the driving motor is controlled to drive the inner drum to rotate and perform the rotation process. After the rotation process is completed, the driving motor is controlled to stop at a fixed position to position the inner drum to a position where the detection component and the sensing component are relative. The washing machine controls the inner drum to rotate during the water inlet process, which can better soak the clothes and improve the washing effect of the clothes; during the water inlet process, the inner drum is controlled to rotate and the inner drum is positioned to detect the water level alternately, which not only ensures the soaking effect of the clothes, but also realizes the water level detection in the inner drum, which is convenient for controlling the water inlet process.

[0070] Specifically, during the water intake process of the washing machine, the driving motor is controlled to drive the inner drum to perform a rotation process at intervals. After each rotation process, the driving motor is controlled to stop at a fixed position to position the inner drum to a position where the detection component is relative to the sensing component. The washing machine detects the position of the detection component through the sensing component to obtain the water level in the inner drum. When the water level in the inner drum reaches the set value, the water-saving process ends. When the water level in the inner drum does not reach the set value, water continues to be taken in and the rotation process is performed.

[0071] Furthermore, when the current water level value in the inner drum obtained by the washing machine is ≥ 4 / 5 of the set water level value, the driving motor is controlled to stop driving the inner drum to perform the rotation process, and the washing machine keeps the inner drum positioned at the relative position between the detection component and the sensing component until the water level in the inner drum reaches the set water level, and then the washing machine releases the positioning of the inner drum.

[0072] When the water level detection device detects that the water level value is about to reach the set water level, the process of controlling the rotation of the inner drum is stopped, and the water level detection is continued until the set water level is reached to avoid causing the water level to be too high.

[0073] As another implementation of this embodiment, a positioning device is provided on the outer drum of the washing machine, the positioning device has a retractable positioning column, and the inner drum has a positioning hole for cooperating with the positioning column;

[0074] During the water intake process of the washing machine, the positioning column of the positioning device is controlled to extend and cooperate with the positioning hole to lock the inner drum, and the detection component and the sensing component are in relative positions.

[0075] In the control method of the washing machine of the present embodiment, when the washing machine is started, the clothes in the inner drum are weighed before water starts to be filled, and the water level of the water filling process is set according to the weight of the clothes.

[0076] The detection component described in this embodiment is a magnetic float with magnetism arranged in the inner drum, the sensing component is a magnetic field sensing device, and the control method includes: during the water intake process of the washing machine, the washing machine detects the position of the magnetic float through the magnetic field sensing device to obtain the water level in the inner drum.

[0077] As an implementation of this embodiment, the magnetic field sensing device is a Hall sensor, and the control method includes: during the water intake process of the washing machine, the induced current of the Hall sensor changes with the height of the magnetic float, and the washing machine obtains the water level height in the inner drum according to the induced current change of the Hall sensor.

[0078] As another implementation of this embodiment, it is characterized in that the magnetic field sensing device is a reed switch, and the reed switch includes a plurality of reed switches, the path of the reed switch arranged outside the inner cylinder corresponds to the up and down floating path of the magnetic float inside the inner cylinder, and the plurality of reed switches are electrically connected to the main control board respectively; the control method includes:

[0079] When the washing machine is filled with water, the magnetic float rises with the water level. When the magnetic float rises, the reed switch corresponding to the height position of the magnetic float closes. The washing machine obtains the water level in the inner drum based on the closing signal of the reed switch at each position.

[0080] In the present embodiment, a light-emitting device is arranged in the inner drum, and a light-transmitting portion is provided on the wall of the inner drum for light emitted by the light-emitting device to pass through. The detection component is a float arranged in the inner drum and floating up and down along the light-transmitting portion. The sensing component is a light sensing device. The control method comprises: during the water intake process of the washing machine, as the water level in the inner drum changes, the float floats along the light-transmitting portion to change the light emitted by the light-transmitting portion, and the washing machine detects the light change through the magnetic field sensing device to obtain the water level in the inner drum.

[0081] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A method for controlling a washing machine, the washing machine comprising: case; An inner drum, arranged in the shell, having a washing chamber for independently containing washing water; And a water level detection device, the water level detection device includes a detection component and a sensing component, the detection component is arranged on the inner cylinder, the position of the detection component can be increased / decreased as the water level increases / decreases, and the sensing component detects the position change of the detection component accordingly; characterized in that the control method includes: When the washing machine is in the process of water intake, the inner drum is positioned to a position where the detection component and the sensing component are opposite to each other, and the washing machine detects the position of the detection component through the sensing component to obtain the water level in the inner drum; During the water intake process of the washing machine, the control driving motor drives the inner drum to rotate and perform the rotation process. After the rotation process is completed, the control driving motor stops at a fixed position to position the inner drum to a position where the detection component and the sensing component are opposite. A positioning device is arranged on the outer drum of the washing machine, the positioning device has a retractable positioning column, and the inner drum has a positioning hole for cooperating with the positioning column; During the water intake process of the washing machine, the positioning column of the positioning device is controlled to extend and cooperate with the positioning hole to lock the inner drum, and the detection component and the sensing component are in relative positions.

2. A method for controlling a washing machine according to claim 1, characterized in that: During the water intake process of the washing machine, the driving motor is controlled to drive the inner drum to perform a rotation process at intervals. After each rotation process, the driving motor is controlled to stop at a fixed position to position the inner drum to a position where the detection component is relative to the sensing component. The washing machine detects the position of the detection component through the sensing component to obtain the water level in the inner drum. When the water level in the inner drum reaches the set value, the water-saving process ends. When the water level in the inner drum does not reach the set value, water continues to be taken in and the rotation process is performed.

3. A method for controlling a washing machine according to claim 2, characterized in that: When the current water level value in the inner drum obtained by the washing machine is ≥ 4 / 5 of the set water level value, the driving motor is controlled to stop driving the inner drum to rotate. The washing machine keeps the inner drum positioned at the relative position between the detection component and the sensing component until the water level in the inner drum reaches the set water level, at which time the washing machine releases the positioning of the inner drum.

4. A method for controlling a washing machine according to claim 1, characterized in that: The washing machine is started, and before water starts to fill the inner drum, the washing machine weighs the clothes, and sets the water level during the water filling process according to the weight of the clothes.

5. A method for controlling a washing machine according to any one of claims 1 to 4, characterized in that: The detection component is a magnetic float with magnetism arranged in the inner drum, the induction component is a magnetic field induction device, and the control method includes: during the water intake process of the washing machine, the washing machine detects the position of the magnetic float through the magnetic field induction device to obtain the water level in the inner drum.

6. A method for controlling a washing machine according to claim 5, characterized in that: The magnetic field sensing device is a Hall sensor, and the control method includes: when the washing machine is in the process of water intake, the induced current of the Hall sensor changes with the height of the magnetic float, and the washing machine obtains the water level in the inner drum according to the change of the induced current of the Hall sensor.

7. A method for controlling a washing machine according to claim 5, characterized in that: The magnetic field sensing device is a reed switch, which includes a plurality of reed switches. The path of the reed switch arranged outside the inner cylinder corresponds to the up and down floating path of the magnetic float inside the inner cylinder. The plurality of reed switches are electrically connected to the main control board respectively. The control method comprises: When the washing machine is filled with water, the magnetic float rises with the water level. When the magnetic float rises, the reed switch corresponding to the height position of the magnetic float closes. The washing machine obtains the water level in the inner drum based on the closing signal of the reed switch at each position.

8. A method for controlling a washing machine according to any one of claims 1 to 4, characterized in that: A light-emitting device is arranged in the inner drum, and a light-transmitting portion is provided on the wall of the inner drum for light emitted by the light-emitting device to pass through and be emitted. The detection component is a float arranged in the inner drum and floating up and down along the light-transmitting portion. The sensing component is a light sensing device. The control method comprises: during the water intake process of the washing machine, as the water level in the inner drum changes, the float floats along the light-transmitting portion to change the light emitted by the light-transmitting portion, and the washing machine detects the light change by the light sensing device to obtain the water level in the inner drum.

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