Drum washing machine and control method thereof

Abstract

The present invention belongs to the technical field of washing machines and discloses a drum washing machine and a control method thereof. The drum washing machine includes an inner drum that independently holds water when washing clothes, and a water level detection module. The water level detection module includes a water level detection device for detecting the water level in the inner drum, and a filter water box connected to the interior of the inner drum. The detection portion of the water level detection device is disposed within the filter water box, and a filtering structure is provided at the connection between the filter water box and the inner drum to prevent lint from entering the filter water box. The drum washing machine of the present invention disposes the detection portion of the water level detection device within the filter water box, and the filter water box is connected to the inner drum, which does not affect water level detection. The filtering structure on the filter water box blocks lint in the water outside the filter water box, thereby preventing the detection portion from being clogged by lint carried in the water, which could affect the accuracy of the detection result.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing machines, and in particular, relates to a drum washing machine and a control method thereof. Background Art

[0002] Existing drum washing machines typically consist of an inner drum and an outer drum, with multiple dewatering holes located on the inner drum's wall. However, during the wash process, the wash water between the inner and outer drums remains unused, resulting in wasted water. Furthermore, some dirt generated during the wash process can remain between the inner and outer drums, making it difficult to clean. Long-term accumulation can contaminate the wash water, impacting the washing effect.

[0003] In order to solve the above problems, a washing machine is proposed in which no dehydration holes are provided on the inner drum, so that the inner drum can independently hold washing water during the washing process, thereby avoiding the accumulation of water between the inner and outer drums during the washing process, saving the amount of washing water, and also largely avoiding the accumulation of dirt between the inner and outer drums.

[0004] However, since there's no water between the inner and outer drums during the wash cycle, the water level detection device installed in the outer drum, as in traditional washing machines, can't be used to detect the water level. If the water level detection device were installed directly on the inner drum, the inner drum would rotate during the wash cycle, causing the water level detection device to rotate with the inner drum. If the water level detection device were directly connected to a fixed control system via signal cables, as in traditional washing machines, to transmit the water level signal, the wiring would be complex, requiring a large number of control cables between the inner and outer drums, and potentially affecting the rotation of the inner drum.

[0005] To achieve signal transmission between the moving water level detection device and the fixed control system, wireless communication technology is currently applied to the aforementioned washing machine. The water level signal detected by the water level detection device is wirelessly transmitted to the control system, thereby controlling the operation of the washing machine. During the washing process, the rotating inner drum of a drum washing machine causes the clothes to be tumbled. The detection part of the water level detection device is located inside the inner drum and may be damaged by the impact of the clothes. Furthermore, lint in the wash water can easily enter the detection part, affecting the accuracy of the detection results. In severe cases, it may clog the detection part, resulting in the inability to detect the water level signal.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a drum washing machine and a control method thereof. By setting a filter water box with a filter structure, the detection part of the water level detection device is installed inside the filter water box. The filter structure on the filter water box blocks the lint in the water outside the filter water box, thereby avoiding the detection part being blocked by the lint carried in the water, affecting the accuracy of the detection results.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A drum washing machine comprises an inner drum for independently holding water when washing clothes, and a water level detection module, wherein the water level detection module comprises a water level detection device for detecting the water level in the inner drum, and a water filter box communicated with the interior of the inner drum;

[0010] The detection portion of the water level detection device is arranged inside the filter water box, and a filtering structure for preventing wire scraps from entering the filter water box is arranged at the connection point between the filter water box and the inner cylinder.

[0011] Furthermore, the water filter box is installed on the inner wall of the inner cylinder, and the filtering structure is a plurality of water inlet holes arranged on the surface of the water filter box.

[0012] Furthermore, the filtered water box has a first surface facing the inner wall of the inner cylinder, and an insertion port is provided on the first surface; the detection portion is a water level probe inserted into the insertion port, and the detection end of the water level probe is located inside the filtered water box;

[0013] Preferably, the water inlet hole is provided on a second surface of the water filter box opposite to the first surface;

[0014] More preferably, the water inlet hole is also provided on a side surface connecting the first surface and the second surface of the water filter box.

[0015] Furthermore, a mounting opening is provided on the inner cylinder, and the water level probe passes through the mounting opening and is plugged into the plug interface on the filtered water box; a sealing member for blocking the mounting opening is provided between the first surface of the filtered water box and the inner wall of the inner cylinder;

[0016] Preferably, a recessed mounting groove is provided on the first surface, and the sealing member is provided in the mounting groove;

[0017] More preferably, the mounting groove is arranged around the plug interface, and the sealing member is an annular sealing member.

[0018] Furthermore, the water level detection device is arranged on the outer periphery of the inner cylinder, or at a position close to the outer periphery of the inner cylinder;

[0019] Preferably, the water level detection device is arranged on the bottom of the inner cylinder and / or the front flange of the inner cylinder near the outer periphery, and the filtered water box is installed on the bottom of the inner cylinder and / or the inner side of the front flange.

[0020] Furthermore, the drum washing machine further comprises an outer drum, and the inner drum is arranged inside the outer drum; the water level detection module further comprises a wireless charging device for supplying power to the water level detection device;

[0021] The water level detection device is arranged on the bottom and / or front flange of the inner drum near the outer periphery, and the wireless charging device is arranged on the bottom and / or front flange of the outer drum. The installation position of the wireless charging device corresponds to the position of the water level detection device when it rotates to the lowest point with the inner drum;

[0022] Preferably, the water level detection module further comprises a signal feedback device, the signal feedback device comprising a signal transmitting end provided on the inner cylinder and electrically connected to the water level detection device, and a signal receiving end wirelessly connected to the signal transmitting end;

[0023] More preferably, the signal transmitting end and the water level detecting device are integrated on the bottom and / or front flange of the inner tube, and the signal receiving end and the wireless charging device are integrated on the bottom and / or front flange of the outer tube.

[0024] Another object of the present invention is to provide a control method for the drum washing machine described above, wherein the drum washing machine further comprises a flow detection module for detecting the water inlet flow rate;

[0025] After water starts to enter, the control system of the drum washing machine determines whether a water inlet failure has occurred and / or the type of water inlet failure based on the signals fed back by the flow detection module and the water level detection module; the types of water inlet failure include damage to the flow detection module and / or the water level detection module, and / or water leakage in the washing machine.

[0026] Furthermore, if the control system receives feedback signals from the flow detection module and the water level detection module, it determines that no water inflow fault has occurred;

[0027] And / or, if the control system receives a water flow signal fed back by the flow detection module but does not receive a water level signal fed back by the water level detection module, it determines that a water inlet fault has occurred, such as a damage to the water level detection module or a water leakage in the washing machine;

[0028] And / or, if the control system receives a water level signal fed back by the water level detection module but does not receive a water flow signal fed back by the flow detection module, it determines that a water inflow fault has occurred due to damage to the flow detection module;

[0029] And / or, if the control system does not receive the feedback signals from the flow detection module and the water level detection module, it is determined that a water inlet fault has occurred in the washing machine, such as water leakage or damage to the flow detection module and the water level detection module.

[0030] Furthermore, after the water starts to enter the water tank and the first preset time has passed, if the control system continues to not receive the water level signal fed back by the water level detection module, the following steps are performed:

[0031] S1, controlling the inner drum to continuously rotate for a second preset time;

[0032] S2, determining whether the water level signal fed back by the water level detection module is received;

[0033] Preferably, before step S1 , the method further includes step S0 : pausing the water inlet process.

[0034] Furthermore, if in step S2, no water level signal fed back by the water level detection module is received, the following steps are performed:

[0035] S3, determine whether the number of times step S1 is executed reaches N times, if not, return to step S1, if so, execute step S4;

[0036] S4. Stop the water inlet process and determine the type of water inlet fault based on whether the water flow signal fed back by the flow detection module is received;

[0037] Preferably, if in step S2, a water level signal fed back by the water level detection module is received, step S5 is executed: the water inlet process is continued, and whether the flow detection module is damaged is determined based on whether a water flow signal fed back by the flow detection module is received.

[0038] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0039] In the drum washing machine of the present invention, a water filter box with a filtering structure is provided, and the detection portion of the water level detection device is positioned within the water filter box. The water filter box is connected to the inner drum, which does not affect water level detection. The filtering structure on the water filter box blocks lint in the water outside the water filter box, preventing the detection portion from being clogged by lint carried in the water and affecting the accuracy of the detection results. Furthermore, the water filter box prevents the detection portion from coming into direct contact with clothing, preventing clothing from scratching the detection portion, and preventing damage to the detection portion caused by impact when clothing is dropped in the inner drum.

[0040] In the drum washing machine of the present invention, a water inlet hole is provided on the water filter box as a filtering structure. Water in the inner drum can enter the water filter box through the water inlet hole without affecting the detection of the water level. At the same time, lint in the washing water can be blocked outside the water filter box. The structure is simple and has a good lint filtering effect.

[0041] In the drum washing machine of the present invention, the filtered water box and the water level probe are plugged and fixed together, resulting in a simple structure and easy assembly. A sealing member is provided between the filtered water box and the inner surface of the inner drum to seal the mounting opening of the inner drum for the water level probe, preventing water leakage from the inner drum caused by the installation of the water level detection device.

[0042] In the drum washing machine of the present invention, the water level detection device is disposed on the bottom of the inner drum and / or the front flange of the inner drum. Compared to methods of mounting the device on the inner drum wall, this prevents clothing from being dropped in the inner drum and impacting the water filter, potentially damaging the filter. It also reduces the probability that clothing covering the surface of the filter, preventing water in the inner drum from entering the filter, and thus preventing the water level signal from being detected.

[0043] The drum washing machine of the present invention receives signals fed back by the flow detection module and the water level detection module simultaneously after water starts to enter, thereby promptly notifying the occurrence of a water inlet failure or confirming the type of the water inlet failure, and then promptly prompting the user, allowing the user to perform targeted maintenance on the relevant components of the drum washing machine, thereby improving maintenance efficiency.

[0044] When the drum washing machine of the present invention does not receive the water level signal fed back by the water level detection module, it controls the inner drum to rotate for a certain period of time to beat the clothes in the inner drum, so that the clothes are redistributed in the inner drum, and then determines again whether the water level signal fed back by the water level detection module can be received, thereby avoiding the situation where the detection part of the water level detection device is covered by clothes, resulting in the inability to detect the water level, and then leading to a misjudgment of a water inlet failure.

[0045] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0047] Figure 1 1 is a schematic structural diagram of a drum washing machine in accordance with a first embodiment of the present invention;

[0048] Figure 2 This invention Figure 1 Schematic diagram of the AA section;

[0049] Figure 3 This invention Figure 2A magnified schematic diagram of the middle B;

[0050] Figure 4 This is a schematic structural diagram of the water filter box in the first embodiment of the present invention;

[0051] Figure 5 This is a schematic structural diagram of the water filter box in Embodiment 1 of the present invention from another angle;

[0052] Figure 6 This is a schematic diagram of the assembly of the sealing member and the water filter box in the first embodiment of the present invention;

[0053] Figure 7 This is the control method flow of the drum washing machine in the fourth embodiment of the present invention. Figure 1 ;

[0054] Figure 8 This is the control method flow of the drum washing machine in the fourth embodiment of the present invention. Figure 2 .

[0055] In the figure: 100, outer cylinder; 101, front flange; 200, inner cylinder; 201, front flange; 202, cylinder wall; 203, drain hole; 310, water level detection device; 311, water level probe; 312, liquid channel; 313, pressure diaphragm; 320, wireless charging device; 331, signal sending end; 332, signal receiving end; 340, filtered water box; 341, first surface; 342, second surface; 343, water inlet; 3431, first water inlet; 3432, second water inlet; 344, plug interface; 345, mounting groove; 346, sleeve portion; 347, fixing hole; 350, sealing member.

[0056] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0059] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0060] Example 1

[0061] like Figures 1 to 6 As shown, the drum washing machine described in this embodiment includes an outer drum 100 and an inner drum 200. The inner drum 200 is arranged in the outer drum 100 and can independently hold water when washing clothes.

[0062] Specifically, the inner drum 200's wall 202 is not provided with a dewatering hole and remains closed during the wash cycle, allowing it to independently hold wash water. A drainage hole 203 is provided on the inner drum 200's wall 202. This hole is blocked by a sealing assembly (not shown) during the wash cycle. When the inner drum 200 reaches a certain rotational speed, the sealing assembly, under the action of centrifugal force, opens the drainage hole 203, allowing the wash water to drain. The outer drum 100 is connected to the drainage structure, and water discharged from the inner drum 200 enters the outer drum 100 and is then discharged from the washing machine through the drainage structure.

[0063] The drum washing machine of this embodiment also includes a water level detection module. Unlike conventional drum washing machines, this embodiment does not have water between the inner drum 200 and the outer drum 100 during washing, and therefore cannot detect the water level in the outer drum 100 or the washing water level. Therefore, the water level detection module of this embodiment includes a water level detection device 310 for detecting the water level in the inner drum 200.

[0064] Specifically, the water level detection module further includes a filtered water box 340 connected to the inner cylinder 200. The detection portion of the water level detection device 310 is set inside the filtered water box 340, and a filtering structure is set at the connection between the filtered water box 340 and the inner cylinder 200 to prevent lint from entering the filtered water box 340.

[0065] In the above solution, filtered water box 340 is connected to the interior of inner drum 200. Water in inner drum 200 can enter filtered water box 340 and contact the detection area of ​​water level detection device 310, thereby detecting the water level in inner drum 200. The filter structure blocks lint in the water outside filtered water box 340, preventing the detection area from being clogged by lint carried in the water and affecting the accuracy of the detection results.

[0066] For example, the detection part is a water level probe 311. The water level probe 311 senses water pressure and obtains water level information by providing a liquid channel 312 and a pressure diaphragm 313 at the end of the liquid channel 312. Washing water generally contains a large amount of lint. If lint enters the liquid channel 312, it will affect the smooth entry of washing water, resulting in inaccurate water pressure sensed by the pressure diaphragm 313 and affecting the accuracy of the water level detection results. In severe cases, lint may even clog the liquid channel 312, preventing washing water from entering and making it impossible to detect the water level signal. The filtering structure on the water filter box 340 prevents lint from entering, thereby preventing the liquid channel 312 from being clogged by lint.

[0067] On the other hand, the provision of the filtered water box 340 also prevents the detection portion from being directly exposed to the inner drum 200, thereby preventing direct contact between the detection portion and clothing, and preventing damage to the detection portion caused by clothing scraping against the detection portion. Furthermore, since the drum washing machine rotates the inner drum 200 during the washing process to achieve the washing effect, the clothing will cause a significant impact force on the inner wall of the inner drum 200 during the tumbling process. The provision of the filtered water box 340 also prevents impact on the detection portion caused by the tumbling of clothing, thereby extending the service life of the water level detection device 310.

[0068] In a specific solution of this embodiment, the filtered water box 340 is installed on the inner wall of the inner cylinder 200 , and the filtering structure is a plurality of water inlet holes 343 provided on the surface of the filtered water box 340 .

[0069] In the above solution, a water inlet hole 343 is provided on the filtered water box 340 as a filtering structure. Water in the inner drum 200 can enter the filtered water box 340 through the water inlet hole 343 without affecting water level detection. Furthermore, the diameter of the water inlet hole 343 is very small, preventing lint from passing through. Thus, lint in the water is trapped outside the filtered water box 340. This simple structure provides excellent lint filtering, thus preventing lint from clogging the liquid channel 312 of the water level probe 311, which could affect the accuracy of detection results.

[0070] In this embodiment, the water level detection device 310 is disposed on the outer periphery of the inner cylinder 200 , or at a position close to the outer periphery of the inner cylinder 200 .

[0071] In one embodiment of this invention, the water level detection device is mounted on the wall of the inner drum, and the filtered water cartridge is mounted on the inner side of the wall of the inner drum. When the water level detection device rotates with the inner drum to its lowest position, the water level detection device is located at the lowest point in the inner drum, providing more accurate water level detection results.

[0072] In another solution of this embodiment, Figure 2As shown, the water level detection device 310 is arranged on the front flange 201 of the inner cylinder 200 near the outer periphery, and the filtered water box 340 is installed on the inner side of the front flange 201 of the inner cylinder 200.

[0073] Compared to the arrangement in which the water level detection device 310 and filtered water box 340 are mounted on the inner drum 200's wall 202, the aforementioned arrangement reduces the impact of clothing tumbling around in the inner drum 200 on the filtered water box 340, thus preventing damage to the filtered water box 340. Furthermore, it reduces the probability that clothing covering the surface of the filtered water box 340 will prevent water in the inner drum 200 from entering the filtered water box 340, and thus prevent the detection of a water level signal. Therefore, in this embodiment, the arrangement in which the water level detection device 310 is mounted on the front flange 201 is preferred.

[0074] In a further embodiment of this embodiment, the filtered water box 340 has a first surface 341 facing the inner wall of the inner drum 200. The first surface 341 is provided with an insertion port 344. The detection portion is a water level probe 311 inserted into the insertion port 344. The detection end of the water level probe 311 is located inside the filtered water box 340.

[0075] In the above embodiment, filtered water box 340 and water level probe 311 are plugged and fixed together, making it easy to position filtered water box 340 and water level probe 311 relative to each other, simplifying the overall structure of water level detection device 310 and making it easy to assemble. Furthermore, since water level probe 311 is completely enclosed by filtered water box 340, there is no direct contact between clothing and water level probe 311, thus preventing damage to the water level probe 311 caused by clothing.

[0076] In a preferred solution of this embodiment, the water inlet 343 includes a first water inlet 3431 provided on a second surface 342 of the filtered water box 340 opposite to the first surface 341 .

[0077] More preferably, the water inlet 343 further includes a second water inlet 3432 provided on a side surface of the filtered water box 340 connecting the first surface 341 and the second surface 342. The second water inlet 3432 is specifically provided on two side surfaces of the filtered water box 340 facing upward and downward.

[0078] In the above scheme, the water inlet holes 343 are respectively arranged on the second surface 342 facing the interior of the inner drum 200, and on the side surfaces on the upper and lower sides of the second surface 342. The washing water in the inner drum 200 does not need to immerse the filtered water box 340 to enter the filtered water box 340, so that the water level probe 311 can detect the water level signal, and the timeliness of the water level detection result is better.

[0079] In this embodiment, the first surface 341 of the filtered water box 340 is further provided with a fixing hole 347 for fixing the filtered water box 340 to the front flange 201 of the inner cylinder 200. For example, the fixing hole 347 is a screw hole, and a screw is inserted through the front flange 201 of the inner cylinder 200 into the fixing hole 347 to fix the filtered water box 340 to the front flange 201.

[0080] The water level detection device 310 also has a portion located outside the inner cylinder 200. A water level probe 311 passes through the front flange 201 and is inserted into the insertion port 344 of the filtered water cartridge 340. The portion of the water level detection device 310 located outside the inner cylinder 200 and the first surface 341 of the filtered water cartridge 340 sandwich the front flange 201 of the inner cylinder 200 between them. Corresponding fixing holes 347 are provided on the portion of the water level detection device 310 located outside the inner cylinder 200 and on the front flange 201. Screws are inserted sequentially through the water level detection device 310 and the front flange 201 into the fixing holes 347 of the filtered water cartridge 340, thereby simultaneously securing the water level detection device 310 and the filtered water cartridge 340 to the front flange 201 of the inner cylinder 200. This eliminates the need for separate fixing of the water level detection device 310 and the filtered water cartridge 340, simplifying the assembly process.

[0081] In a further embodiment of this embodiment, the inner cylinder 200 has an installation opening through which the water level probe 311 is inserted into the insertion port 344 of the filtered water box 340. A seal 350 is provided between the first surface 341 of the filtered water box 340 and the inner wall of the inner cylinder 200 to seal the installation opening.

[0082] Specifically, the installation port is provided on the front flange 201 , and the sealing member 350 is located between the first surface 341 of the filtered water box 340 and the inner side of the front flange 201 of the inner cylinder 200 .

[0083] Preferably, a recessed mounting groove 345 is provided on the first surface 341 , and the sealing member 350 is disposed in the mounting groove 345 .

[0084] More preferably, the mounting groove 345 is arranged around the plug port 344 , and the sealing member 350 is an annular sealing member 350 .

[0085] In the above embodiment, the seal 350 is positioned between the filtered water box 340 and the front flange 201 of the inner drum 200, sealing the mounting opening on the front flange 201 and preventing water leakage from the inner drum 200 caused by the installation of the water level detection device 310. The installation groove 345 facilitates the positioning of the seal 350 and the filtered water box 340. The seal 350 can be placed in the installation groove 345 before the filtered water box 340 is installed on the front flange 201, simplifying assembly. The installation groove 345 circumferentially surrounds the insertion port 344, and the annular seal 350 is positioned therein, ensuring a complete circumferential seal around the mounting opening through which the water level probe 311 passes, achieving a strong sealing effect.

[0086] Specifically, in this embodiment, a certain distance exists between the inner periphery of the mounting groove 345 and the outer periphery of the insertion port 344, forming a sleeve portion 346 therebetween that sleeves onto the outer peripheral wall of the water level probe 311. The sleeve portion 346, coupled to the water level probe 311, provides a more stable fit between the water level detection device 310 and the filtered water cartridge 340. The left end of the water level probe 311 includes a mounting boss extending toward the outer periphery of the water level probe 311. The inner periphery of the mounting opening on the front flange 201 abuts against the outer periphery of the mounting boss. The left side surface of the sealing member 350 seals against the surface of the mounting boss and the inner surface of the front flange 201, respectively, thereby sealing the mounting opening.

[0087] In a preferred embodiment of this embodiment, each adjacent surface of the filtered water box 340 has rounded transitions to prevent sharp corners or ridges from scratching and damaging clothing. The radius of the rounded corners between the lower surface and the front and rear surfaces is larger than the radius of the rounded corners between the upper surface and the front and rear surfaces. This allows the lower side of the filtered water box 340 to avoid the curvature of the cylinder wall 202 during installation, allowing the filtered water box 340 to be installed as close to the outer periphery of the front flange 201 as possible. This also allows the water level detection device 310 to be installed as close to the outer periphery of the front flange 201 as possible, allowing water level signals to be detected even when the amount of water entering the inner cylinder 200 is very small, resulting in more timely detection.

[0088] In a further solution of this embodiment, the water level detection module further includes a wireless charging device 320 for supplying power to the water level detection device 310 .

[0089] The water level detection device 310 is arranged on the front flange 201 of the inner cylinder 200 near the outer periphery, and the wireless charging device 320 is arranged on the front flange 101 of the outer cylinder 100. The installation position of the wireless charging device 320 corresponds to the position of the water level detection device 310 when it rotates to the lowest point with the inner cylinder 200.

[0090] In the above solution, wireless charging is used to power water level detection device 310. Compared to wired charging, this reduces the need for supporting structures and simplifies the layout of connecting cables, thereby reducing costs and improving the assembly efficiency of the drum washing machine. Water level detection device 310 contains a coil that interacts with wireless charging device 320. Wireless charging device 320 generates a varying magnetic field, which stimulates current in the coil, thereby providing power to water level detection device 310, enabling it to operate and obtain water level information in inner drum 200.

[0091] In a further solution of this embodiment, the water level detection module also includes a signal feedback device, which includes a signal sending end 331 arranged on the inner cylinder 200 and electrically connected to the water level detection device 310, and a signal receiving end 332 wirelessly connected to the signal sending end 331.

[0092] In the above scheme, the signal transmitting terminal 331 is electrically connected to the water level detecting device 310 and is used to obtain the water level detection results of the water level detecting device 310 and transmit them to the signal receiving terminal 332. The signal transmitting terminal 331 is connected to the water level detecting device 310 by wire to obtain the water level monitoring results and needs to be installed on the inner drum 200 together with the water level detecting device 310. The signal receiving terminal 332 is electrically connected to the control system of the drum washing machine and is used to transmit the received water level information to the control system for controlling the operation of the drum washing machine. The water level detection module transmits information through a wireless communication connection between the signal transmitting terminal 331 and the signal receiving terminal 332, further simplifying the layout of the connecting cables and improving the assembly efficiency of the drum washing machine.

[0093] In a preferred solution of this embodiment, the signal transmitting end 331 and the water level detecting device 310 are integrated on the front flange 201 of the inner tube 200 , and the signal receiving end 332 and the wireless charging device 320 are integrated on the front flange 101 of the outer tube 100 .

[0094] In the above solution, the signal transmitting terminal 331 is integrated with the water level detection device 310 to form a single unit, and the signal receiving terminal 332 is integrated with the wireless charging device 320 to form a single unit. This simplifies the structure of the water level detection module, thereby further simplifying the assembly process of the drum washing machine. The signal transmitting terminal 331 is integrated with the water level detection device 310, and the wireless charging device 320 simultaneously supplies power to the water level detection device 310 and the signal transmitting terminal 331. When the signal transmitting terminal 331 and the water level detection device 310 rotate with the inner drum 200 to the active area of ​​the wireless charging device 320, that is, near the lowest point, the wireless charging device 320 supplies power to the water level detection device 310 and the signal transmitting terminal 331. The water level detection device 310 detects the water level in the inner drum 200 and transmits the detection result to the signal receiving terminal 332 via the signal transmitting terminal 331, enabling the control system to obtain the water level in the inner drum 200.

[0095] The drum washing machine of this embodiment is equipped with a Hall effect sensor at the bottom or rear portion of the outer drum 100, and a magnet mounted on the outer portion of the bottom or wall 202 of the inner drum 200. The Hall effect sensor is positioned to correspond to the circumferential position of the wireless charging device 320 around the outer drum 100. During the rotation of the inner drum 200, the Hall effect sensor's response to the magnet on the inner drum 200 determines the rotational position of the inner drum 200, thereby enabling the positioning of the water level detection device 310.

[0096] Before water begins to fill, the inner drum 200 is secured so that the water level detection device 310 is at its lowest position. Once the water inlet valve is opened and water begins to flow in, the wireless charging device 320 supplies power to the water level detection device 310. During this process, the water level in the inner drum 200 is monitored in real time. After a preset initial water filling duration, the inner drum 200 begins to rotate. After a preset rotation duration, the inner drum 200 is controlled to rotate until the water level detection device 310 is within the active area of ​​the wireless charging device 320 based on feedback from the Hall effect sensor, at which point the inner drum 200 stops rotating. The rotation duration is set based on the time it takes for the clothing to absorb water.

[0097] After the inner cylinder 200 stops, power is supplied to the water level detection device 310 and the signal sending end 331 through the wireless charging device 320. The water level detection device 310 detects the water level height in the inner cylinder 200 and sends the water level detection result to the control system through the wireless communication connection between the signal sending end 331 and the signal receiving end 332.

[0098] Furthermore, the drum washing machine has a wash water heating function. Specifically, an electromagnetic heating module is disposed below the inner drum 200, either inside or outside the outer drum 100. The wall 202 of the inner drum 200 is at least partially made of metal. The metal wall 202 generates eddy currents under the stimulation of the electromagnetic heating module, generating heat, thereby heating the wash water in the inner drum 200. Preferably, the entire wall 202 of the inner drum 200 is made of metal. During the rotation of the inner drum 200, each portion of the wall 202 is stimulated by the electromagnetic heating module and generates heat, thereby achieving higher heating efficiency.

[0099] In another scheme of this embodiment, the cylinder wall 202 of the inner cylinder 200 can be made of insulating material, and lifting ribs or other additional modules made of metal material are provided on the cylinder wall 202 of the inner cylinder 200. The lifting ribs or other additional modules generate heat under the excitation of the electromagnetic heating module, thereby heating the washing water in the inner cylinder 200.

[0100] The drum washing machine of this embodiment is preset with a minimum heating water level. When a wash program with a wash water heating function is running, the water level in the inner drum 200 is detected by the water level detection module. When the detected water level reaches or exceeds the minimum heating water level, the electromagnetic heating module is controlled to turn on and start heating, preventing dry-burning failures, thereby preventing the drum wall 202 of the inner drum 200 from overheating and damaging clothes. Dry-burning failures can also cause overheating of the electromagnetic heating module itself, which in severe cases may cause damage to the electromagnetic heating module and even cause accidents such as fire or explosion, seriously endangering user safety. The water level in the inner drum 200 is detected by the water level detection module, and the electromagnetic heating module is controlled to turn on when the detected water level reaches the minimum heating water level. This effectively avoids a series of adverse consequences caused by dry-burning and ensures user safety.

[0101] In this embodiment, a temperature probe can be integrated into the water level detection device 310 to detect the washing water temperature. This, combined with the electromagnetic heating module, allows for more accurate temperature control of the washing water. By simultaneously powering the water level probe 311, the temperature probe, and the signal transmitter 331 through the wireless charging device 320, dual detection of the water level and temperature can be achieved, resulting in a more compact structure.

[0102] The drum washing machine of this embodiment utilizes a filtered water box 340 to install the water level probe 311 of the water level detection device 310 inside the filtered water box 340. This prevents direct contact between the water level probe 311 and clothing, thereby preventing clothing from damaging the water level probe 311. The water inlet 343 in the filtered water box 340 allows water from the inner drum 200 to enter without affecting water level detection. The water inlet 343 also blocks lint carried in the water outside the filtered water box 340, preventing lint from clogging the liquid passage 312 within the water level probe 311, thereby ensuring more accurate detection results. The water level detection device 310 and filtered water box 340 are installed on the front flange 201 of the inner drum 200, reducing the impact of clothing tumbling in the inner drum 200 on the filtered water box 340 during washing. This also reduces the probability that clothing will cover the surface of the filtered water box 340, preventing water from entering the filtered water box 340 and, consequently, preventing the detection of a water level signal.

[0103] Example 2

[0104] The difference between this embodiment and the above-mentioned embodiment 1 is that the water level detection device is installed on the bottom of the inner cylinder, and the filtered water box is installed on the inner side of the bottom of the inner cylinder.

[0105] Correspondingly, the bottom of the inner drum has a mounting opening. The water level probe of the water level detection device passes through the mounting opening and plugs into a socket on the filtered water box fixed to the bottom of the inner drum. A sealing member is provided between the side of the filtered water box facing the bottom of the inner drum and the bottom of the inner drum to seal the mounting opening on the bottom of the drum.

[0106] Preferably, the water level detection device is arranged on the bottom of the inner cylinder near the outer periphery, and the wireless charging device is arranged on the bottom of the outer cylinder, and its installation position corresponds to the position of the water level detection device when it rotates to the lowest point with the inner cylinder.

[0107] Furthermore, the signal transmitting end and the water level detecting device are integrated on the bottom of the inner tube, and the signal receiving end and the wireless charging device are integrated on the bottom of the outer tube.

[0108] The structure of this embodiment is essentially the same as that of the first embodiment, with the only change being the location of the water level detection module, which is no longer mounted on the front flange of the inner drum but now on the bottom of the inner drum. The wireless charging device has also been adjusted to a corresponding location on the outer drum. Similar to the first embodiment, the drum washing machine of this embodiment also prevents the water level detection device's water level probe from being damaged by clothing or clogged by lint, thereby improving the accuracy of the detection results and extending the service life of the water level detection device.

[0109] Example 3

[0110] The drum washing machine described in this embodiment is a combination of the first and second embodiments described above, namely, two water level detection devices are provided, one mounted on the bottom and one mounted on the front flange of the inner drum. Correspondingly, two filtered water boxes are also provided, one mounted on the inner side of the bottom and one mounted on the inner side of the front flange of the inner drum.

[0111] Correspondingly, mounting openings are provided on the bottom and front flange of the inner drum. The water level probes of the two water level detection devices each pass through a mounting opening and connect to the sockets on the filtered water cartridges fixed to the bottom and front flange of the inner drum, respectively. Seals are provided between the sides of the filtered water cartridges facing the inner wall of the inner drum and the corresponding bottom or front flange to seal the mounting openings on the bottom and front flange.

[0112] Preferably, two water level detection devices are respectively arranged on the bottom of the inner cylinder and the front flange near the outer periphery, and two wireless charging devices are provided, which are respectively installed on the bottom of the outer cylinder and the front flange, and their installation positions correspond to the position of the water level detection device when it rotates to the lowest point with the inner cylinder.

[0113] Furthermore, two signal sending ends are provided, which are integrated with the water level detection devices installed on the bottom and front flange of the inner tube respectively, and two signal receiving ends are provided accordingly, which are integrated with the wireless charging devices installed on the bottom and front flange of the outer tube respectively.

[0114] In this embodiment, the specific assembly structure of the water level detection module and the inner drum is the same as in Embodiments 1 and 2, thereby improving the accuracy of the water level detection device's detection results and extending the service life of the water level detection device. The water level detection modules are respectively installed on the front flange and bottom of the inner drum, and the water level height is detected at the front and rear of the inner drum, further improving the accuracy of the water level detection results.

[0115] Example 4

[0116] This embodiment provides a control method for the drum washing machine described in the first or second embodiment.

[0117] The drum washing machine further includes a flow detection module for detecting water inflow. Specifically, the flow detection module includes a flow meter disposed on the water inlet pipe, preferably disposed at the water inlet valve. The flow meter can detect whether water is flowing through, thereby allowing the flow detection module to continuously feedback a water flow signal during the water inlet process after the water inlet valve is opened.

[0118] During the normal water inlet process, after the water inlet valve is opened for a certain period of time, when the liquid level of the washing water in the inner drum reaches the height of the water level probe, the water level probe can detect the water level information, so that the water level detection module can feedback the water level signal.

[0119] like Figure 7As shown, after the drum washing machine of this embodiment begins to fill with water, the control system of the drum washing machine determines whether a water inflow fault has occurred and / or the type of water inflow fault based on the signals fed back by the flow detection module and the water level detection module. The types of water inflow faults include damage to the flow detection module and / or the water level detection module, and / or water leakage in the washing machine.

[0120] In the above solution, if the drum washing machine is receiving water normally, it can simultaneously receive the water flow signal fed back by the flow detection module and the water level signal fed back by the water level detection module. If any of these feedback signals is not received for a period of time after water begins to enter, a water inflow failure is likely to have occurred. By simultaneously receiving the signals fed back by the flow detection module and the water level detection module after water begins to enter, the drum washing machine can promptly be informed of the occurrence of a water inflow failure and can thus promptly alert the user to avoid affecting use. At the same time, compared to the method of determining a water inflow failure through a single detection module, it can effectively avoid misjudgments caused by damage to the detection module itself, reducing the probability of misjudgment.

[0121] Alternatively, the drum washing machine of this embodiment can further confirm the type of water inlet failure based on the feedback signal received, and can inform the user of the type of water inlet failure while prompting the user, so that the user can inspect and repair the relevant components of the drum washing machine in a targeted manner, thereby improving maintenance efficiency.

[0122] Specifically, after the water inlet valve is opened, the feedback signals received by the control system may include the following:

[0123] In case 1, if the control system receives feedback signals from the flow detection module and the water level detection module, it determines that no water inflow fault has occurred.

[0124] In the above case, that is, after the water inlet valve is opened, the flow detection module and the water level detection module both provide normal feedback, indicating that the drum washing machine is in a normal water inlet state and can continue to operate until the water inlet is completed and continue with subsequent processes.

[0125] In case 2, if the control system receives the water flow signal fed back by the flow detection module but does not receive the water level signal fed back by the water level detection module, it determines that a water inlet fault has occurred, such as the water level detection module being damaged or the washing machine leaking water.

[0126] In the above situation, the flow detection module feeds back a water flow signal, indicating that the water flow in the water inlet pipe is normal and the flow detection module is functioning normally. However, the water level detection module does not feed back a water level signal. In this case, the washing machine may be receiving water normally, but due to damage to the water level detection module itself, it is unable to feed back a water level signal. It is also possible that a water inlet failure has occurred in the washing machine, such as a water inlet pipe leak that prevents water from entering the inner drum, or a water inlet pipe leak that causes water to flow out of the inner drum. In this case, the drum washing machine needs to pause the water inlet process and prompt the user. After receiving the prompt information, the user can check the water inlet pipe, inner drum, and water flow detection module to determine the actual faulty component before repairing it. In this case, there is no need to check the flow detection module, which can improve maintenance efficiency.

[0127] Case three: if the control system receives the water level signal fed back by the water level detection module but does not receive the water flow signal fed back by the flow detection module, it is determined that a water inlet fault has occurred due to damage to the flow detection module.

[0128] In this case, the water level detection module returns a water level signal, indicating that the water level in the inner drum is normal, water is flowing into the inner drum normally, and the water level detection module is functioning normally. However, the flow detection module does not return a water flow signal, suggesting damage. In this case, the water inflow process can be paused to prompt the user for maintenance.

[0129] Since the specific water inflow can also be controlled by the water level detection module, the washing process can continue until the washing process is completed and the user is prompted for maintenance. After receiving the prompt information, the user can directly repair or replace the water flow detection module without having to check the water inlet pipe, inner drum and water flow detection module one by one to troubleshoot the problem, which improves maintenance efficiency.

[0130] In case 4, if the control system does not receive the feedback signal from the flow detection module and the water level detection module, it is determined that a water inlet fault has occurred in the washing machine, such as water leakage or damage to the flow detection module and the water level detection module.

[0131] In the above situation, if neither the flow detection module nor the water level detection module returns a signal, it could be that water is flowing normally but both are damaged, or it could be that the washing machine is leaking. In this case, the drum washing machine will pause the water filling process and notify the user. After the user checks each component one by one to determine the type of water inflow problem, they can then repair or replace the faulty component.

[0132] like Figure 8 As shown, in a further solution of this embodiment, after the water starts to enter and reaches the first preset time, if the control system continues to not receive the water level signal fed back by the water level detection module, the following steps are executed:

[0133] S1, controlling the inner drum to continuously rotate for a second preset time;

[0134] S2. Determine whether the water level signal fed back by the water level detection module is received.

[0135] Preferably, before step S1 , the method further includes step S0 : pausing the water inlet process.

[0136] In the above solution, when the drum washing machine fails to receive a water level signal from the water level detection module, it controls the inner drum to rotate for a certain period of time, tumbling the clothes in the inner drum to redistribute the clothes within the inner drum. It then determines again whether it can receive a water level signal from the water level detection module. This avoids the situation where the detection area of ​​the water level detection device is covered by clothes, making it unable to detect the water level, and thus leading to a false diagnosis of a water inflow fault.

[0137] In the preferred solution of this embodiment, if the water level signal fed back by the water level detection module is not received in step S2, the following steps are performed:

[0138] S3, determine whether the number of times step S1 is executed reaches N times, if not, return to step S1, if so, execute step S4;

[0139] S4. Stop the water inlet process and determine the type of water inlet fault based on whether the water flow signal fed back by the flow detection module is received.

[0140] In this embodiment, the maximum number of execution times N of step S1 can be set to 2 or 3 times.

[0141] When the clothes are redistributed by rotating the inner drum, after the second preset time period, the detection portion of the water level detection device may not be fully exposed, resulting in no water level signal being detected. Especially during the rinse cycle after spin, the clothes may be firmly attached to the inner wall of the inner drum, and performing step S1 only once may not remove the clothes covering the detection portion.

[0142] In the above solution, if the water level signal is still not received after redistributing the laundry, step S1 can be repeated 2-3 times to ensure that the laundry is completely removed from the water level detection device. If the water level detection module still does not receive a water level signal, it indicates that the water level detection module is damaged or the washing machine is leaking, resulting in no water entering the inner drum. At this point, the type of water ingress fault can be further determined by whether the water flow detection module receives a water flow signal.

[0143] Preferably, if in step S2, a water level signal fed back by the water level detection module is received, step S5 is executed: the water inlet process is continued, and whether the flow detection module is damaged is determined based on whether a water flow signal fed back by the flow detection module is received.

[0144] In this embodiment, if the water level detection module properly returns a water level signal, it indicates that there is no water inflow failure in the washing machine, and the water level detection module is functioning normally and can detect the water level in the inner drum. At this point, the drum washing machine can be controlled to continue the wash cycle. If the control system can also properly receive the water flow signal from the flow detection module, it indicates that there is no water inflow failure and the drum washing machine can continue to operate until the end of the wash cycle. If the control system cannot receive the water flow signal from the flow detection module, it indicates that the flow detection module is damaged. The drum washing machine can still continue to operate until the end of the wash cycle and prompt the user to perform maintenance after the wash cycle ends.

[0145] After water begins to fill, the drum washing machine of this embodiment simultaneously receives feedback signals from both the flow rate detection module and the water level detection module. This allows for timely notification of a water inflow fault or confirmation of the type of water inflow fault, prompting the user to perform targeted repairs on the relevant components of the drum washing machine, thereby improving maintenance efficiency. If no water level signal is received from the water level detection module, the inner drum is rotated for a certain period of time, causing the clothing in the drum to be tumbled and redistributed within the drum. The system then re-determines whether a water level signal from the water level detection module is received. This avoids the situation where the detection area of ​​the water level detection device is covered by clothing, resulting in an inability to detect the water level and a misjudgment of a water inflow fault.

[0146] 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 drum washing machine, comprising an inner drum for independently holding water when washing clothes, and a water level detection module, characterized in that: The water level detection module includes a water level detection device for detecting the water level in the inner cylinder, and a filtered water box communicated with the interior of the inner cylinder; The detection part of the water level detection device is arranged inside the filter water box, and a filtering structure is provided at the connection between the filter water box and the inner cylinder to prevent wire scraps from entering the filter water box; The water filter box is installed on the inner wall of the inner cylinder, and the filtering structure is a plurality of water inlet holes arranged on the surface of the water filter box; The filtered water box has a first surface facing the inner wall of the inner cylinder, and an insertion port is provided on the first surface; the detection portion is a water level probe inserted into the insertion port, and the detection end of the water level probe is located inside the filtered water box; The water level probe is provided with a liquid channel and a pressure diaphragm at the end of the liquid channel to sense water pressure and thereby obtain water level information.

2. The drum washing machine according to claim 1, characterized in that: The water inlet hole is arranged on a second surface of the water filter box which is opposite to the first surface.

3. The drum washing machine according to claim 2, characterized in that: The water inlet hole is also provided on the side surface of the water filter box connecting the first surface and the second surface.

4. The drum washing machine according to claim 1, characterized in that: The inner cylinder is provided with an installation opening, and the water level probe passes through the installation opening and is plugged into the plug interface on the filtered water box; a sealing member for blocking the installation opening is provided between the first surface of the filtered water box and the inner wall of the inner cylinder.

5. The drum washing machine according to claim 4, characterized in that: A recessed mounting groove is provided on the first surface, and the sealing member is provided in the mounting groove.

6. The drum washing machine according to claim 5, characterized in that: The mounting groove is arranged around the plug interface, and the sealing member is an annular sealing member.

7. The drum washing machine according to any one of claims 1 to 6, characterized in that: The water level detection device is arranged on the outer periphery of the inner cylinder, or at a position close to the outer periphery of the inner cylinder.

8. The drum washing machine according to claim 7, characterized in that: The water level detection device is arranged on the bottom of the inner cylinder and / or the front flange of the inner cylinder near the outer periphery, and the filtered water box is installed on the bottom of the inner cylinder and / or the inner side of the front flange.

9. The drum washing machine according to any one of claims 1 to 6, characterized in that: The drum washing machine further includes an outer drum, and the inner drum is arranged inside the outer drum; the water level detection module further includes a wireless charging device for supplying power to the water level detection device; The water level detection device is arranged on the bottom of the inner cylinder and / or the front flange near the outer periphery, and the wireless charging device is arranged on the bottom of the outer cylinder and / or the front flange of the outer barrel. The installation position of the wireless charging device corresponds to the position of the water level detection device when it rotates to the lowest point with the inner cylinder.

10. The drum washing machine according to claim 9, characterized in that: The water level detection module further includes a signal feedback device, which includes a signal transmitting end provided on the inner cylinder and electrically connected to the water level detection device, and a signal receiving end wirelessly connected to the signal transmitting end.

11. The drum washing machine according to claim 10, characterized in that: The signal transmitting end and the water level detecting device are integrated on the bottom and / or the front flange of the inner tube, and the signal receiving end and the wireless charging device are integrated on the bottom and / or the front flange of the outer tube.

12. A method for controlling a drum washing machine according to any one of claims 1 to 11, characterized in that: The drum washing machine further includes a flow detection module for detecting water inflow; After water starts to enter, the control system of the drum washing machine determines whether a water inlet failure has occurred and / or the type of water inlet failure based on the signals fed back by the flow detection module and the water level detection module; the types of water inlet failure include damage to the flow detection module and / or the water level detection module, and / or water leakage in the washing machine.

13. The control method of the drum washing machine according to claim 12, characterized in that: If the control system receives the feedback signals from the flow detection module and the water level detection module, it determines that no water inflow fault has occurred; And / or, if the control system receives a water flow signal fed back by the flow detection module but does not receive a water level signal fed back by the water level detection module, it determines that a water inlet fault has occurred, such as a damage to the water level detection module or a water leakage in the washing machine; And / or, if the control system receives a water level signal fed back by the water level detection module but does not receive a water flow signal fed back by the flow detection module, it determines that a water inflow fault has occurred due to damage to the flow detection module; And / or, if the control system does not receive the feedback signals from the flow detection module and the water level detection module, it is determined that a water inlet fault has occurred in the washing machine, such as water leakage or damage to the flow detection module and the water level detection module.

14. The control method of a drum washing machine according to claim 12 or 13, characterized in that: After the water starts to enter the system and the first preset time has passed, if the control system continues to not receive the water level signal fed back by the water level detection module, the following steps are executed: S1, controlling the inner drum to continuously rotate for a second preset time; S2. Determine whether the water level signal fed back by the water level detection module is received.

15. The control method of the drum washing machine according to claim 14, characterized in that: Before step S1 , the method further includes step S0 : pausing the water inlet process.

16. The control method of the drum washing machine according to claim 14, characterized in that: If the water level signal fed back by the water level detection module is not received in step S2, the following steps are performed: S3, determine whether the number of times step S1 is executed reaches N times, if not, return to step S1, if so, execute step S4; S4. Stop the water inlet process and determine the type of water inlet fault based on whether the water flow signal fed back by the flow detection module is received.

17. The control method of the drum washing machine according to claim 16, characterized in that: If in step S2, the water level signal fed back by the water level detection module is received, step S5 is executed: the water inlet process is continued, and whether the flow detection module is damaged is determined based on whether the water flow signal fed back by the flow detection module is received.

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