A washing machine

Abstract

The present invention provides a washing machine comprising: a housing; an inner drum, disposed within the housing and having a washing chamber independently containing washing water; and a water level detection device, the water level detection device comprising a detection component and a sensing component, the detection component being disposed on the inner drum, the position of the detection component being able to rise / fall as the water level rises / falls, the sensing component correspondingly detecting changes in the position of the detection component; the sensing component determining the water level within the inner drum by detecting the position of the detection component. The water level detection device of the present invention is designed to address the structural characteristics of a non-porous inner drum washing machine, wherein the position of the detection component disposed within the inner drum is able to change as the water level changes, the sensing component being disposed outside the inner drum correspondingly detecting changes in the position of the detection component, the sensing component determining the water level within the inner drum by detecting the position of the detection component, thereby achieving water level detection within the inner drum. The device has a simple structure, high detection accuracy, and broad market prospects.

Description

Technical Field

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

[0002] Washing machines are one of the most widely used household appliances in our daily lives, freeing us from the hassles of laundry and bringing great convenience. However, existing washing machines generally consist of an inner drum and an outer drum, with multiple dewatering holes distributed on the inner drum wall. During the washing process, the wash water between the inner and outer drums is not used, resulting in waste of this water. Furthermore, dirt generated during the washing process can flow into the space between the inner and outer drums and accumulate. Over time, this accumulation of dirt can affect the washing effect and reduce the user experience.

[0003] To address the above-mentioned issues, several patents have been proposed, such as the Chinese invention patent application number 201410215346.3, entitled "A Drum Washing Machine." This invention relates to a drum washing machine comprising a housing, an inner drum and an outer drum disposed therein, a door seal disposed between the outer drum and the housing, the inner drum connected to a drive device, the inner drum being a non-porous inner drum having a tapered shape with a small diameter at the bottom and a large diameter at the mouth, the mouth of the inner drum converging inwardly in an arc, the door seal being provided with a water inlet conduit, one end of which is connected to a rapid washing water heating device, the other end of which passes through the door seal and extends into the inner drum, the outer drum being provided with a drain port and a water pressure detection device. As can be seen from the above technical solution, the inner drum of this invention is a non-porous inner drum, water is introduced into the inner drum via the water inlet conduit disposed on the door seal, and water is drained during the dehydration process by virtue of the shape of the inner drum itself. This prevents water from accumulating between the inner and outer drums, significantly saving 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 accumulation of dirt between the inner drum and the outer drum. However, the existing washing machine method of arranging a water level sensor on the outer drum to detect the water level in the outer drum to control the water inlet process 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 washing machine capable of realizing water level detection of a non-porous inner drum washing machine. Specifically, the following technical solutions are adopted:

[0007] A washing machine, comprising:

[0008] case;

[0009] The inner drum is arranged in the shell and has a washing chamber for independently holding washing water;

[0010] 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 rise / lower as the water level rises / lowers, and the sensing component detects the position change of the detection component accordingly; the sensing component obtains the water level height in the inner cylinder by detecting the position of the detection component.

[0011] Furthermore, the detection component is a magnetic float with magnetism arranged in the inner cylinder, and the sensing component is a magnetic field sensing device. The magnetic field sensing device obtains the water level in the inner cylinder by detecting the height change of the magnetic float.

[0012] Furthermore, a float housing is provided in the inner cylinder, and a float chamber communicating with the inner cylinder is formed between the float housing and the cylinder wall of the inner cylinder. The magnetic float is provided in the float chamber and can float up and down with changes in water level.

[0013] Furthermore, the float housing is mounted on the bottom wall of the inner cylinder, and a float chamber extending radially along the bottom wall of the inner cylinder is formed between the float housing and the bottom wall. A communication port communicating with the interior of the inner cylinder is provided at one end of the float housing close to the peripheral side wall of the inner cylinder.

[0014] Furthermore, a guide structure for guiding the magnetic float to float up and down is provided in the float housing;

[0015] Preferably, the guide structure is a guide rod arranged inside the float housing, the magnetic float has a through channel inside, the guide rod passes through the through channel of the magnetic float, and the magnetic float can float up and down along the guide rod.

[0016] Furthermore, the washing machine includes a main controller, the magnetic field sensing device is a Hall sensor, and the Hall sensor is electrically connected to the main controller;

[0017] The induced current of the Hall sensor changes as the height of the magnetic float changes, and the main controller obtains the water level in the inner cylinder according to the change of the induced current of the Hall sensor.

[0018] Furthermore, the washing machine includes a main controller, the magnetic field sensing device is a reed switch, and the reed switches include a plurality of reed switches. The paths of the reed switches arranged outside the inner drum correspond to the paths of the magnetic float floating up and down inside the inner drum. The plurality of reed switches are electrically connected to the main control board respectively. As the height of the magnetic float changes, the reed switches corresponding to the height position of the magnetic float close, and the main controller derives the water level in the inner drum based on the closing signals of the reed switches at each position.

[0019] Preferably, each of the reed switches corresponds to a settable water level 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 controller determines that the water has filled in to the set water level.

[0020] Furthermore, the washing machine includes an outer drum, and the magnetic field sensing device is arranged on the outer drum;

[0021] Preferably, the magnetic field induction device is arranged on the bottom wall of the outer cylinder.

[0022] Furthermore, a positioning device is provided on the outer cylinder, the positioning device has a retractable positioning column, and the inner cylinder has a positioning hole for cooperating with the positioning column;

[0023] When the positioning post of the positioning device extends out and matches with the positioning hole to lock the inner cylinder, the magnetic field sensing device and the magnetic float are in relative positions.

[0024] Furthermore, a light emitting device is provided in the inner tube, and a light-transmitting portion is provided on the wall of the inner tube for light emitted by the light emitting device to pass through. The detection component is a float provided in the inner tube and floating up and down along the light-transmitting portion, and the sensing component is a light sensing device.

[0025] As the water level in the inner tube changes, the float floats along the light-transmitting portion to change the light emitted by the light-transmitting portion. The magnetic field sensing device obtains the water level in the inner tube by detecting the light change.

[0026] The present invention provides a washing machine that does not require washing / rinsing water to be filled between an inner drum and an outer drum, thereby avoiding the possibility of dirt adhering between the inner drum and the outer drum, preventing the inner drum and the outer drum from becoming dirty, and improving user health and user experience; and reducing the amount of washing water used in the washing machine, thereby saving water consumption.

[0027] The water level detection device of the present invention addresses the structural characteristics of washing machines with non-porous inner drums. The detection component, positioned within the inner drum, changes position with the water level. The sensing component, located outside the inner drum, detects changes in the detection component's position. The sensing component determines the water level within the inner drum by detecting the position of the detection component, thereby achieving water level detection within the inner drum. This water level detection device solves the water level detection problem in non-porous inner drum washing machines, boasts a simple structure, high detection accuracy, and broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A front view of a washing machine according to a first embodiment of the present invention;

[0029] Figure 2 Embodiment 1 of the present invention: a washing machine Figure 1 Cross-sectional view of the middle XX plane;

[0030] Figure 3 Embodiment 1 of the present invention: a washing machine Figure 2 A partial enlarged view of point A in the middle;

[0031] Figure 4 A flowchart of a control method for a washing machine according to a second embodiment of the present invention;

[0032] Figure 5 Flowchart of a control method for a washing machine according to a second embodiment of the present invention.

[0033] 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 dispenser box 17-upper table panel 18-hollow channel 19-inner cylinder shaft 20-drive motor 21-side wall 22-float shell 23-guide rod 24-bottom wall 25-connecting port 26-air pressure balancing mechanism. DETAILED DESCRIPTION

[0034] A washing machine of the present invention is described in detail below with reference to the accompanying drawings:

[0035] Example 1

[0036] like Figure 1-3 As shown, a washing machine of this embodiment includes:

[0037] Shell 1;

[0038] The inner drum 5 is arranged in the housing 1 and has a washing chamber for independently holding washing water;

[0039] 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 rise / lower as the water level rises / lowers. 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.

[0040] This embodiment provides a washing machine that does not require washing / rinsing water to be filled between the inner drum and the outer drum. This not only avoids the possibility of dirt adhering between the inner drum and the outer drum, preventing the inner drum and the outer drum from getting dirty, thereby improving user health and user experience; it also reduces the amount of water used for washing in the washing machine, saving water consumption.

[0041] The water level detection device of this embodiment is based on 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 component 7, thereby realizing water level detection in the inner drum.

[0042] 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, which solves the problem that the structural components in the non-porous 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.

[0043] The inner drum 5 of this embodiment is a non-porous inner drum with a closed drum wall. An inner drum door 14 is provided on the drum opening of the inner drum to form an independent sealed cabin structure 15. This prevents the clothes in the inner drum 5 from coming out, and prevents the clothes from being compressed or dropped, causing water to flow out of the inner drum or splash out. This prevents the possibility of dirt adhering between the inner and outer drums, and truly achieves a water-free space between the inner and outer drums.

[0044] Since the drum dehydration speed can reach 1600 rpm, if the inner drum door on the inner drum is not locked properly, a safety accident will occur. 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 inner drum door is locked in place and the locking judgment accuracy is 100%, greatly improving the safety of the machine, user health and user experience.

[0045] As an implementation 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.

[0046] This embodiment solves the problem of water level detection in a non-porous inner drum washing machine by adopting a magnetic field induction device to induce a magnetic float, and has a simple structure and high detection accuracy.

[0047] Furthermore, in order to solve the installation problem of the magnetic float, a float housing 22 is provided in the inner cylinder 5 described in this embodiment. A float chamber connected to the interior of the inner cylinder is formed between the float housing 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 changes in water level.

[0048] Specifically, the float housing 22 described in this embodiment is installed on the bottom wall 24 of the inner cylinder 5. 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. A communication port 25 communicating with the interior of the inner cylinder is provided at one end of the float housing 22 close to the peripheral side wall 21 of the inner cylinder 5.

[0049] In this embodiment, the float housing 22 is mounted on the bottom wall 24 of the inner drum 5, eliminating the space in the center of the inner drum 5 and preventing any interference with the laundry 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. This allows the float chamber to be positioned vertically to measure the water level by positioning the inner drum 5.

[0050] 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.

[0051] Preferably, the guide structure is a guide rod 23 provided inside the float housing. The magnetic float has a through passage inside. The guide rod 23 passes through the through passage of the magnetic float. The magnetic float can float up and down along the guide rod.

[0052] 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 based on the change of the induced current of the Hall sensor.

[0053] 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.

[0054] Preferably, each of the reed switches corresponds to a settable water level 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.

[0055] Furthermore, the washing machine of this embodiment includes an outer drum 4 , and the magnetic field induction device is arranged on the outer drum 4 ; preferably, the magnetic field induction device is arranged on the bottom wall of the outer drum 4 .

[0056] Because the inner drum rotates during the washing process, the water level detection requires the float chamber housing the electromagnetic float to be vertically positioned. Therefore, the inner drum must be positioned to a specific location during water level detection. To achieve this objective, the outer drum 4 of this embodiment is provided with a positioning device comprising a retractable positioning post, and the inner drum 5 has a positioning hole for engaging the positioning post. When the positioning post of the positioning device is extended and engages the positioning hole to lock the inner drum, the magnetic field sensing device and the magnetic float are in relative position, and the float chamber is in a vertical position.

[0057] In addition, the inner drum 5 can also be locked at a certain position by the driving motor of the washing machine.

[0058] This embodiment also provides another solution for water level detection in a hole-free inner cylinder. In this embodiment, a light-emitting device is provided in the inner cylinder 5. The inner cylinder 5 has a light-transmitting portion on its wall for the light-emitting device to emit light. The detection component 7 is a float provided in the inner cylinder 5 and floats up and down along the light-transmitting portion. The sensing component is a light sensing device.

[0059] As the water level in the inner tube changes, the float floats along the light-transmitting portion to change the light emitted by the light-transmitting portion. The magnetic field sensing device obtains the water level in the inner tube by detecting the light change.

[0060] The light emitting device in the above manner can be powered by a battery and sealed at the same time.

[0061] The washing machine of this embodiment utilizes a non-porous inner drum structure. To achieve drainage of the non-porous inner drum, drainage holes are provided on the sidewalls of the inner drum. A centrifugal drainage mechanism 10 is installed in the drainage holes. The centrifugal drainage mechanism 10 maintains the drainage holes in a normally closed state, forming a non-porous inner drum that independently holds wash water. When drainage is required, the inner drum is controlled to rotate at high speed, and the centrifugal mechanism 10, under the centrifugal effect of the high-speed rotation, opens the drainage holes, and the wash water is discharged through the drainage holes. Preferably, a plurality of lifting ribs 6 are provided on the wall of the inner drum 5, and the centrifugal drainage mechanism 10 is disposed within the internal cavity of at least one of the lifting ribs 6.

[0062] In order to improve the drainage efficiency of the inner cylinder 5, the centrifugal drainage mechanism 10 of this embodiment is arranged in the middle of the peripheral wall of the inner cylinder. 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 centrifugal drainage structure 10 in the middle to be discharged.

[0063] 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 .

[0064] The washing machine of this embodiment has a casing 1, which includes: an upper panel 17, a front panel, a back panel and a bottom panel. The bottom panel is fixed with feet 9 for supporting the entire washing machine, and the front panel is installed with a door 2. 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, lifting ribs 6 are 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 installed. The inner drum shaft 19, which is fastened to the inner drum 5, passes through the bearing shown and is connected to the drive motor 20.

[0065] To allow water to flow into the non-porous inner drum of this embodiment, the drive motor 19 of the washing machine of this embodiment is fixedly connected to the inner drum 5 via the inner drum shaft 19, which drives the inner drum 5 to rotate. The inner drum shaft 19 has a hollow passage 18 that communicates with the interior of the inner drum 5. The water inlet pipe 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 pipe extends out of the washing machine housing 1 to connect to the faucet. The water inlet pipe is sequentially connected to the water inlet valve 13, the detergent dispensing device 16, and the hollow passage 18 of the inner drum shaft 19.

[0066] In this embodiment, the inner cylinder 5 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.

[0067] When water enters, the pressurized gas in the sealed compartment of the inner tube can overflow through the balancing mechanism to ensure air pressure balance.

[0068] When the water supply is suddenly cut off, the external atmosphere can quickly enter the sealed compartment of the inner tube and destroy the back suction, ensuring the air pressure balance and preventing the washing water from being sucked into the tap water network.

[0069] For example, during dehydration, the air pressure balancing mechanism can also ensure the air pressure balance in the inner drum.

[0070] As one implementation of this embodiment, the air pressure balancing mechanism includes a pressure equalizing channel 26 formed on the inner cylinder shaft 19, connecting the interior of the inner cylinder 5 with the external environment. The maximum water level in the inner cylinder 5 is lower than the inner cylinder shaft. This prevents water in the inner cylinder 5 from flowing out of the pressure equalizing channel 26.

[0071] The pressure-equalizing channel 26 in this embodiment comprises a first channel section and a second channel section. The first channel section is arranged parallel to the hollow passage, with one end communicating with the interior of the inner cylinder. The second channel section has one end connected to the first channel section and the other end extending to the outer circumferential wall of the inner cylinder shaft and communicating with 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.

[0072] Example 2

[0073] like Figure 4 and Figure 5 As shown, a control method for a washing machine of this embodiment is provided. The washing machine comprises: a housing; an inner drum, disposed within the housing and having a washing chamber independently containing wash water; and a water level detection device, the water level detection device comprising a detection component and a sensing component. The position of the detection component disposed within the inner drum can change with changes in the water level, and the sensing component is disposed outside the inner drum to correspondingly detect changes in the position of the detection component. The control method comprises:

[0074] When the washing machine is filling with water, the inner drum is positioned to a position where the detection component is opposite 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.

[0075] The control method of this embodiment realizes water level detection of the non-porous inner cylinder by controlling the positioning of the inner cylinder during water inflow and cooperating with the water level detection device. The water level detection is accurate, simple, effective, stable and reliable.

[0076] As one embodiment of this invention, during water inflow, the washing machine controls the drive motor to rotate the inner drum to perform a rotation process. After the rotation process is completed, the drive motor is controlled to stop at a fixed position to position the inner drum relative to the detection component and the sensing component. The washing machine controls the inner drum to rotate during water inflow, thereby better wetting the clothes and improving the washing effect. During water inflow, the washing machine alternates between controlling the inner drum rotation and positioning the inner drum for water level detection, which not only ensures the wetting effect of the clothes but also enables water level detection within the inner drum, facilitating control of the water inflow process.

[0077] Specifically, during the water intake process of the washing machine, the driving motor is controlled to drive the inner drum to perform the 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.

[0078] 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 drive 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, at which time the washing machine releases the positioning of the inner drum.

[0079] When the water level detection device detects that the water level value is about to reach the set water level, it stops controlling the rotation of the inner drum and continues to detect the water level until it reaches the set water level to avoid the water level being too high.

[0080] As another implementation of this embodiment, a positioning device is provided on the outer drum of the washing machine, wherein the positioning device has a retractable positioning post, and the inner drum has a positioning hole for cooperating with the positioning post;

[0081] During the water filling 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.

[0082] In the control method of the washing machine of this embodiment, the washing machine is started, and 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.

[0083] 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 filling 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.

[0084] As an implementation of this embodiment, the magnetic field sensing device is a Hall sensor, and the control method includes: when the washing machine is filled with water, 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.

[0085] As another implementation of this embodiment, it is characterized in that the magnetic field sensing device is a reed switch, and the reed switches include multiple reed switches. The paths of the reed switches arranged outside the inner cylinder correspond to the up and down floating paths of the magnetic float inside the inner cylinder. The multiple reed switches are electrically connected to the main control board respectively; the control method includes:

[0086] When the washing machine is filled with water, the magnetic float rises with the water level. During the rising process of the magnetic float, the reed switch corresponding to the height position of the magnetic float closes. The washing machine calculates the water level in the inner drum based on the closing signal of the reed switch at each position.

[0087] In this embodiment, a light-emitting device is provided 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 provided 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 includes: during the water filling 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.

[0088] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A washing machine, characterized in that: include: case; outer cylinder; The inner drum is arranged in the shell and has a washing chamber for independently holding washing water, and its axis is arranged in the horizontal direction; and a water level detection device, comprising a detection component and a sensing component. The detection component is disposed on the inner cylinder, and its position can be raised / lowered as the water level rises / falls. The sensing component detects the position change of the detection component accordingly. The sensing component determines the water level in the inner cylinder by detecting the position of the detection component. The detection component is a magnetic float with magnetism arranged in the inner cylinder, and the induction component is a magnetic field induction device. The magnetic field induction device obtains the water level in the inner cylinder by detecting the height change of the magnetic float. A float housing mounted on the bottom wall of the inner cylinder is provided in the inner cylinder. A float chamber is formed between the float housing and the bottom wall, communicating with the interior of the inner cylinder and extending radially along the bottom wall of the inner cylinder. The magnetic float is provided in the float chamber and can float up and down with changes in the water level. The magnetic field sensing device is provided on the bottom wall of the outer cylinder. When the washing machine is filled with water, the driving motor is controlled to drive the inner drum to rotate at intervals. After each rotation process, the inner drum is positioned to a position where the detection component and the sensing component are opposite to each other, and the water level in the inner drum is obtained by detecting the position of the detection component through the sensing component. When the water level in the inner drum reaches the set value, the water filling process ends. When the water level in the inner drum does not reach the set value, the water continues to fill and the rotation process is performed. 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 drive motor is controlled to stop driving the inner drum to perform the rotation process. 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.

2. A washing machine according to claim 1, characterized in that: One end of the float housing close to the peripheral side wall of the inner cylinder is provided with a communication port communicated with the interior of the inner cylinder.

3. The washing machine according to claim 1, wherein: A guide structure for guiding the magnetic float to float up and down is arranged in the float housing.

4. A washing machine according to claim 3, characterized in that: The guide structure is a guide rod arranged inside the float housing. The magnetic float has a through channel inside. The guide rod passes through the through channel of the magnetic float. The magnetic float can float up and down along the guide rod.

5. The washing machine according to claim 1, characterized in that: It includes a main controller, the magnetic field sensing device is a Hall sensor, and the Hall sensor is electrically connected to the main controller; The induced current of the Hall sensor changes as the height of the magnetic float changes, and the main controller obtains the water level in the inner cylinder according to the change of the induced current of the Hall sensor.

6. The washing machine according to claim 1, characterized in that: It includes a main controller, the magnetic field sensing device is a reed switch, and the reed switches include multiple ones. The path of the reed switches arranged outside the inner cylinder corresponds to the up and down floating path of the magnetic float inside the inner cylinder. The multiple reed switches are electrically connected to the main control board respectively: as the height of the magnetic float changes, the reed switches corresponding to the height position of the magnetic float are closed, and the main controller obtains the water level in the inner cylinder according to the closing signals of the reed switches at each position.

7. A washing machine according to claim 6, characterized in that: Each of the reed switches corresponds to a settable water level 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 controller determines that the water has filled in to the set water level.

8. A washing machine according to any one of claims 1 to 7, characterized in that: The outer cylinder is provided with a positioning device, the positioning device has a retractable positioning column, and the inner cylinder has a positioning hole for cooperating with the positioning column; When the positioning post of the positioning device extends out and matches with the positioning hole to lock the inner cylinder, the magnetic field sensing device and the magnetic float are in relative positions.

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