Sealing assembly, drum washing machine and control method

Abstract

The present invention provides a sealing assembly, a drum washing machine and a control method, wherein the sealing assembly comprises a door seal and a door body, the door seal being used to be arranged at a clothing loading port, and the door body being used to be arranged on a machine casing to open or close the clothing loading port; the door body comprising a door shell and an observation window, and the observation window being arranged on the door shell; a sealing structure is provided at one end of the door seal close to the door shell, and the sealing structure comprises a front sealing lip and a rear sealing lip which are arranged opposite to each other along the axial direction of the door seal; when the door body closes the clothing loading port, the front sealing lip and the rear sealing lip are arranged around the outside of the observation window, and the front sealing lip and the rear sealing lip are interference fit with the observation window, so that the door seal and the observation window are tightly sealed; a supporting rib is formed between the door seal and the rear sealing lip, so that the deformation resistance of the rear sealing lip is improved, so that the rear sealing lip and the observation window are tightly and evenly sealed; under the action of negative pressure, the front sealing lip is adsorbed on the observation window, so that the front sealing lip and the observation window are tightly and evenly sealed.

Description

Technical Field

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

[0002] In recent years, the washing machine industry has developed rapidly, and people's consumption level has also been increasing. More and more families are using drum washing machines instead of traditional pulsator washing machines. As more and more users use drum washing machines, the disadvantages of drum washing machines are becoming more and more obvious. For example, drum washing machines are different from pulsator washing machines. The drum is placed horizontally, and the door body is opened horizontally. When the door body closes the clothing loading port, a very high sealing performance is required between the door body and the door seal. In existing drum washing machines, when fully loaded, the seal between the door body and the door seal is not tight due to the compression of the load, resulting in water leakage. When the water level is high, the uneven sealing between the door body and the door seal causes water leakage. Summary of the Invention

[0003] In view of this, the present invention provides a sealing assembly, a drum washing machine and a control method to solve the problem that the seal between the door body and the door seal in the existing drum washing machine is not tight, resulting in water leakage when the drum washing machine is fully loaded or the water level is high.

[0004] The present invention provides a sealing assembly for a clothing inlet of a drum washing machine; the drum washing machine includes a housing, the housing being provided with a clothing inlet; the sealing assembly includes a door seal and a door body, the door seal being provided at the clothing inlet, the door body being provided on the housing to open or close the clothing inlet;

[0005] The door body includes a door shell and an observation window, wherein the observation window is provided on the door shell; a sealing structure is provided at one end of the door seal close to the door shell, wherein the sealing structure includes at least a front sealing lip and a rear sealing lip which are arranged opposite to each other along the axial direction of the door seal;

[0006] When the door body closes the clothing loading port, the front sealing lip and the rear sealing lip are arranged around the outside of the observation window, and both the front sealing lip and the rear sealing lip are interference-fitted with the observation window.

[0007] Further optionally, a support rib is formed between the door seal and the front sealing lip, and / or a support rib is formed between the door seal and the rear sealing lip.

[0008] Further optionally, a cavity is formed between the door shell and the observation window, the door shell is formed with an exhaust port communicating with the cavity, the observation window is formed with a vent communicating with the cavity, and the vent is close to the sealing structure;

[0009] The sealing assembly is configured such that when the door body closes the clothing loading port, the air in the cavity can be discharged to the outside of the cavity through the exhaust port, and under the negative pressure of the vent hole, the front sealing lip and / or the rear sealing lip are adsorbed on the observation window.

[0010] Further optionally, an air pump is provided in the cavity, the inlet of the air pump is connected to the cavity, and the outlet of the air pump is connected to the exhaust port through an exhaust pipe; the exhaust pipe is connected in series with a valve, and the valve can be controlled to open or close.

[0011] Further optionally, a door shell convex rib is provided on a side of the door shell close to the door seal, the door shell convex rib is an annular structure and is arranged around the observation window;

[0012] The door seal is provided with a door seal rib at one end close to the door shell; the door seal rib is annular in structure and the door seal rib and the door seal are coaxially arranged, or a plurality of door seal ribs are provided and the plurality of door seal ribs are spaced apart along the circumference of the door seal;

[0013] When the door body closes the clothing loading port, the door shell rib and the door seal rib abut against each other.

[0014] Further optionally, a side of the door shell close to the door seal is further provided with an abutment pad; when the door body closes the clothing loading port, the abutment pad is used to abut against the casing.

[0015] Further optionally, the abutment pad is arranged above the observation window, and the abutment pad is made of elastic material.

[0016] The present invention further provides a drum washing machine, comprising a casing, a drum, a drive motor, and any one of the above-described sealing assemblies; the drum is rotatably disposed within the casing, the casing being provided with a clothing loading opening at a position corresponding to the drum opening of the drum, the drive motor being drivably connected to the drum; the door seal being disposed at the clothing loading opening, and the door body being rotatably disposed on the casing;

[0017] When the door body is close to the door seal and the sealing structure is interference-fitted with the observation window, the clothing loading port is closed;

[0018] When the door body is away from the door seal, the clothing loading port is opened.

[0019] The present invention also provides a control method for a drum washing machine, wherein the drum washing machine is the drum washing machine described above; the drum washing machine is provided with a washing program, and when the drum washing machine runs the washing program, the control method comprises:

[0020] Controlling the rotation of the driving motor and obtaining the torque of the driving motor in real time;

[0021] The direction and / or speed of the drive motor are controlled according to the torque of the drive motor.

[0022] Further optionally, controlling the direction and / or speed of the drive motor according to the torque of the drive motor includes:

[0023] Determining whether a sudden change occurs in the torque of the drive motor;

[0024] When a sudden change occurs in the torque of the drive motor, the drive motor is controlled to rotate in the opposite direction of the current rotation direction to regain the torque of the drive motor;

[0025] Then determining whether there is a sudden change in the torque of the drive motor;

[0026] According to the result of determining whether a sudden change occurs in the torque of the drive motor, the drive motor is controlled to rotate alternately in forward and reverse directions until the torque of the drive motor does not suddenly change.

[0027] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0028] (1) A sealing structure is provided at one end of the door seal close to the door shell, and the sealing structure includes a front sealing lip and a rear sealing lip which are arranged opposite to each other along the axial direction of the door seal; when the door body closes the clothing loading port, the front sealing lip and the rear sealing lip are arranged around the outside of the observation window, and the front sealing lip and the rear sealing lip are interference fit with the observation window, so that the door seal and the observation window are tightly sealed, thereby solving the problem of loose sealing between the door body and the door seal in the existing drum washing machine, which leads to water leakage between the door body and the door seal when the washing machine is fully loaded or the water level is high.

[0029] (2) A supporting rib is formed between the door seal and the rear sealing lip to improve the deformation resistance of the rear sealing lip, so that the seal between the rear sealing lip and the observation window is tight and uniform; under the negative pressure of the vent hole, the front sealing lip is adsorbed on the observation window, so that the seal between the front sealing lip and the observation window is tight and uniform;

[0030] (3) A door shell convex rib is provided on one side of the door shell close to the door seal, and a door seal convex rib is provided on one end of the door seal close to the door shell. The door shell convex rib and the door seal convex rib abut against each other, which can effectively reduce the shaking of the door body; the abutment pad abuts against the casing to prevent the lower side of the door body from being forcibly opened and leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0032] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0033] Figure 1 A schematic structural diagram of a door embodiment provided by the present invention;

[0034] Figure 2a This is a schematic diagram of the main structure of a door seal embodiment provided by the present invention;

[0035] Figure 2b A schematic cross-sectional view of a door seal embodiment provided by the present invention;

[0036] Figure 2c for Figure 2b Enlarged view of point A in the middle;

[0037] Figure 2d and Figure 2e This is a schematic diagram of the axial structure of a door seal embodiment provided by the present invention;

[0038] Figure 3a This is a schematic diagram of the main structure of an embodiment of a drum washing machine provided by the present invention;

[0039] Figure 3b This is a schematic cross-sectional view of an embodiment of a drum washing machine provided by the present invention;

[0040] Figure 3c for Figure 3b Enlarged view of point B in the middle;

[0041] Figure 3d for Figure 3b Enlarged view of point C in the middle;

[0042] Figure 4a This is a schematic diagram of the assembly structure of the door body, door seal and housing embodiment provided by the present invention;

[0043] Figure 4b This is a schematic diagram of the exploded structure of the door body, door seal and casing provided by the present invention;

[0044] In the picture:

[0045] 1-door body; 11-door shell; 111-door shell rib; 112-abutment pad; 12-observation window; 13-cavity; 131-vent;

[0046] 2-Door seal; 21-Front sealing lip; 22-Rear sealing lip; 221-Radial outer section; 222-Radial inner section; 23-Support rib; 24-Door seal rib; 25-Avoidance space;

[0047] 3-drum washing machine; 31-housing; 311-clothing inlet; 32-drum;

[0048] 41-vacuum pump; 42-exhaust pipe. DETAILED DESCRIPTION

[0049] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0050] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0051] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0052] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0053] Unlike pulsator washing machines, drum washing machines are placed horizontally with the door open horizontally. When the door closes the clothing loading opening, a high degree of sealing is required between the door and the door seal. Existing drum washing machines often have a loose seal between the door and the door seal, which can lead to water leakage between the door and the door seal when the drum washing machine is fully loaded or the water level is high.

[0054] The present invention creatively provides a sealing assembly for the clothing loading port of a drum washing machine; the door seal is provided with a sealing structure, the sealing structure including a front sealing lip and a rear sealing lip arranged opposite to each other along the axial direction of the door seal; when the door body closes the clothing loading port, the front sealing lip and the rear sealing lip are interference fit with the observation window, so that the door seal and the observation window are sealed and tightly sealed, thereby preventing water leakage between the door body and the door seal when the drum washing machine is fully loaded or the water level is high.

[0055] Example 1

[0056] like Figures 1 to 2e As shown, this embodiment provides a sealing assembly for a clothing loading port 311 of a drum washing machine 3. The drum washing machine 3 includes a housing 31 and a drum 32. The drum 32 is rotatably disposed inside the housing 31. The housing 31 is formed with a clothing loading port 311 at a position corresponding to the drum opening of the drum 32. A user can place clothing into or take clothing out of the drum 32 through the clothing loading port 311. The sealing assembly includes a door seal 2 and a door body 1. The door seal 2 is used to be disposed at the clothing loading port 311. The door body 1 is used to be disposed on the housing 31 to open or close the clothing loading port 311.

[0057] The door body 1 includes a door shell 11 and an observation window 12. The observation window 12 is provided on the door shell 11. Specifically, the door shell 11 is circular, and one side of the door shell 11 is hinged to the housing 31 via a rotating shaft. When the door body 1 rotates about the rotating shaft, the clothing loading port 311 can be opened or closed. The observation window 12 is provided on the side of the door shell 11 near the door seal 2.

[0058] The door seal 2 is an annular structure and is made of elastic material. The door seal 2 is arranged around the clothing loading port 311; a sealing structure is provided at one end of the door seal 2 close to the door shell 11, and the sealing structure includes at least a front sealing lip 21 and a rear sealing lip 22 arranged opposite to each other along the axial direction of the door seal 2; the front sealing lip 21 and the rear sealing lip 22 are both located on the inner side wall of the door seal 2, and the front sealing lip 21 and the rear sealing lip 22 are both annular structures, and the front sealing lip 21 and the rear sealing lip 22 are both coaxially arranged with the door seal 2; along the axial direction of the door seal 2, from the bottom of the drum 32 to the drum mouth of the drum 32 ( Figure 2b and Figure 2e In the front-to-back direction), the front sealing lip 21 is in front of the rear sealing lip 22;

[0059] When the door body 1 closes the clothing loading port 311, the front sealing lip 21 and the rear sealing lip 22 are arranged around the outside of the observation window 12, and the front sealing lip 21 and the rear sealing lip 22 are interference fit with the observation window 12, that is, at least a part of the front sealing lip 21 is attached to the observation window 12, and at least a part of the rear sealing lip 22 is attached to the observation window 12, so that the door seal 2 and the observation window 12 are sealed and tightly sealed, preventing water in the drum 32 from being discharged through the gap between the door seal 2 and the observation window 12; when the drum washing machine 3 is fully loaded, double sealing between the door seal 2 and the observation window 12 is achieved by the front sealing lip 21 and the rear sealing lip 22, which is tight and doubly leak-proof.

[0060] Specifically, the front sealing lip 21 and the rear sealing lip 22 are both inclined toward one side of the bottom of the drum 32, and an avoidance space 25 is formed between the front sealing lip 21 and the rear sealing lip 22. When the front sealing lip 21 and the observation window 12 cooperate, at least a portion of the front sealing lip 21 is deformed toward the avoidance space 25, and the avoidance space 25 can accommodate at least a portion of the deformation of the front sealing lip 21; the radial length of the rear sealing lip 22 is greater than the radial length of the front sealing lip 21, and along the radial direction of the door seal 2, the rear sealing lip 22 includes a radial inner section 222 and a radial outer section 221, and the radial inner section 222 and the radial outer section 221 form an L-shaped structure; the radial inner section 222 is formed on the side of the radial outer section 221 facing the front sealing lip 21, and the thickness of the radial inner section 222 is greater than the thickness of the radial outer section 221; when the rear sealing lip 22 and the observation window 12 cooperate, the radial inner section 222 and the observation window 12 are sealed and connected, and the radial outer section 221 plays a supporting role.

[0061] It should be noted that there is no limit to the number of sealing lips included in the sealing structure, and multiple sealing lips can be arranged in sequence along the axial direction of the door seal 2; when the door body 1 closes the clothing loading port 311, the multiple sealing lips are all arranged around the outside of the observation window 12, and the sealing lips are interference fit with the observation window 12 to improve the sealing effect.

[0062] Example 2

[0063] like Figures 1 to 2e As shown, the deformation resistance of the front sealing lip 21 and the rear sealing lip 22 determines the sealing performance between the door seal 2 and the observation window 12. Therefore, in this embodiment, a support rib 23 is formed between the door seal 2 and the front sealing lip 21, and / or a support rib 23 is formed between the door seal 2 and the rear sealing lip 22. The support rib 23 improves the deformation resistance of the front sealing lip 21 and / or the rear sealing lip 22, and the front sealing lip 21 and the observation window 12, as well as the rear sealing lip 22 and the observation window 12, are tightly and evenly sealed, thereby solving the problem in the prior art that the sealing lips of the observation window 12 and the door seal are deformed and unevenly sealed when they cooperate.

[0064] Preferably, a support rib 23 is formed between the door seal 2 and the rear sealing lip 22 ; specifically, a support rib 23 is formed between the door seal 2 and a side of the radial outer section 221 facing the bottom of the drum 32 .

[0065] The stress conditions of the front sealing lip 21 and the rear sealing lip 22 also affect the sealing performance between the door seal 2 and the observation window 12. Therefore, in this embodiment, a cavity 13 is formed between the door shell 11 and the observation window 12. The door shell 11 is formed with an exhaust port communicating with the cavity 13, and the observation window 12 is formed with a vent 131 communicating with the cavity 13. The vent 131 is close to the sealing structure.

[0066] The sealing assembly is configured such that: when the door body 1 closes the clothing loading port 311, the air in the cavity 13 can be discharged to the outside of the cavity 13 through the exhaust port, thereby forming a negative pressure in the cavity 13 and at the vent 131. Under the action of the negative pressure in the vent 131, the front sealing lip 21 and / or the rear sealing lip 22 are adsorbed on the observation window 12, so that the front sealing lip 21 and the observation window 12, as well as the rear sealing lip 22 and the observation window 12, are tightly and evenly sealed.

[0067] Preferably, the vent hole 131 is provided close to the front sealing lip 21 , and under the negative pressure of the vent hole 131 , the front sealing lip 21 is adsorbed on the observation window 12 ; the rear sealing lip 22 and the observation window 12 always maintain an interference fit together.

[0068] Specifically, a plurality of vent holes 131 are provided, and the plurality of vent holes 131 are arranged around the observation window 12, and the plurality of vent holes 131 are arranged corresponding to the front sealing lip 21; under the negative pressure of the plurality of vent holes 131, the front sealing lip 21 is adsorbed on the observation window 12; the size of the vent holes 131 can be set according to the radial length of the front sealing lip 21.

[0069] Furthermore, an air pump 41 is provided in the cavity 13, the inlet of the air pump 41 is connected to the cavity 13, and the outlet of the air pump 41 is connected to the exhaust port through an exhaust pipe 42; the exhaust pipe 42 is connected in series with a valve, which can be controlled to open or close;

[0070] When the door 1 closes the clothing loading port 311 and the drum washing machine 3 starts a washing program, the air extraction pump 41 is controlled to operate and the valve is opened, so that the air in the cavity 13 is discharged to the outside of the cavity 13 through the exhaust pipe 42 and the exhaust port. Then, a negative pressure is formed in the cavity 13. At this time, the front sealing lip 21 is adsorbed on the observation window 12 through the vent hole 131. When the pressure difference between the inside and outside of the cavity 13 reaches a preset value, the air extraction pump 41 is controlled to stop operating and the valve is closed, so that the door seal 2 and the observation window 12 are further sealed.

[0071] After the drum washing machine 3 finishes the washing program and drains the water, the control valve opens to connect the inside and outside of the cavity 13. The air pressure in the cavity and the air pressure in the environment where the washing machine is located reach equilibrium, and the front sealing lip 21 no longer adsorbs the observation window 12. At this time, the user can open the door 1.

[0072] When the drum washing machine 3 is fully loaded, the drum 32 rotates, and the load squeezes the door body 1, causing the seal between the door body 1 and the door seal 2 to be loose and the door body 1 to shake. In this embodiment, a door shell rib 111 is provided on the side of the door shell 11 close to the door seal 2. The door shell rib 111 is annular and is arranged around the observation window 12.

[0073] A door seal rib 24 is provided at one end of the door seal 2 close to the door shell 11; the door seal rib 24 is annular in structure and the door seal rib 24 and the door seal 2 are coaxially arranged, or a plurality of door seal ribs 24 are provided and the plurality of door seal ribs 24 are spaced apart along the circumference of the door seal 2;

[0074] When the door body 1 closes the clothing loading port 311, the door shell rib 111 and the door seal rib 24 abut against each other; when the load presses the door body 1, the abutment between the door shell rib 111 and the door seal rib 24 can effectively reduce the shaking of the door body 1;

[0075] Furthermore, the door shell rib 111 can be detachably set on the door shell 11, and the door seal rib 24 can be detachably set on the door seal 2. According to the degree of shaking of the door body 1, the appropriate door shell rib 111 can be set on the door shell 11, and the appropriate door seal rib 24 can be set on the door seal 2, so that the door shell rib 111 and the door seal rib 24 are abutted against each other, effectively reducing the shaking of the door body 1.

[0076] When the load presses the lower side of the door body 1, it is often easy to force the door body 1 open, causing the seal between the door body 1 and the door seal 2 to fail and leak water. This embodiment proposes that abutment pad 112 is also provided on the side of the door shell 11 close to the door seal 2; when the door body 1 closes the clothing loading port 311, the abutment pad 112 is used to abut on the casing 31 to prevent the lower side of the door body 1 from being forcibly opened and leaking water.

[0077] Furthermore, the abutment pad 112 is detachably mounted on the door shell 11 and its position on the door shell 11 is adjustable; the appropriate abutment pad 112 can be positioned at the appropriate position of the door shell 11 according to the location and amount of water leakage between the door body 1 and the door seal 2, thereby effectively preventing the lower side of the door body 1 from being forcibly opened.

[0078] Preferably, the abutment pad 112 is provided above the observation window 12 , and the abutment pad 112 is made of elastic material; preferably, the abutment pad 112 is made of rubber.

[0079] The front sealing lip 21 and the rear sealing lip 22 are arranged around the outside of the observation window 12, and the front sealing lip 21 and the rear sealing lip 22 are interference fit with the observation window 12; under the action of the vacuum pump 41, the cavity 13 and the vent 131 form a negative pressure, so that the front sealing lip 21 is tightly adsorbed on the observation window 12, increasing the contact area and contact force between the front sealing lip 21 and the observation window 12, and achieving further sealing; the support rib 23 is used to improve the deformation resistance of the rear sealing lip 22, so that the rear sealing lip 22 is tightly adsorbed on the observation window 12, increasing the contact area and contact force between the rear sealing lip 22 and the observation window 12, and achieving further sealing.

[0080] Example 3

[0081] like Figures 3a to 4b As shown, this embodiment provides a drum washing machine 3, comprising a housing 31, a drum 32, a drive motor, and the sealing assembly described in any one of Embodiments 1 and 2; the drum 32 is rotatably disposed inside the housing 31, and the housing 31 is formed with a clothing loading port 311 at a position corresponding to the drum opening of the drum 32, and the drive motor is drivingly connected to the drum 32; a door seal 2 is disposed at the clothing loading port 311, and a door body 1 is rotatably disposed on the housing 31; specifically, one side of the door housing 11 is hinged to the housing 31 by a rotating shaft, and when the door body 1 rotates about the rotating shaft, the clothing loading port 311 can be opened or closed; an observation window 12 is provided on the side of the door housing 11 near the door seal 2;

[0082] When the door body 1 is close to the door seal 2 and the sealing structure is interference-fitted with the observation window 12, the clothing loading port 311 is closed;

[0083] When the door body 1 moves away from the door seal 2 , the clothing loading port 311 is opened.

[0084] When the drum washing machine 3 runs a washing program, the drum 32 rotates, and the load squeezes the door body 1, reducing the sealing between the door body 1 and the door seal 2. Therefore, by reducing the load on the door body 1, the sealing between the door body 1 and the door seal 2 can be ensured. This embodiment also provides a control method for the drum washing machine 3. The drum washing machine 3 is the drum washing machine 3 described above. The drum washing machine 3 is provided with a washing program. When the drum washing machine 3 runs the washing program, the control method includes:

[0085] Control the rotation of the drive motor and obtain the torque of the drive motor in real time;

[0086] The direction and / or speed of the drive motor are controlled according to the torque of the drive motor.

[0087] Furthermore, controlling the direction and / or speed of the drive motor according to the torque of the drive motor includes:

[0088] Determine whether the torque of the drive motor has a sudden change;

[0089] When the torque of the drive motor suddenly changes, the drive motor is controlled to rotate in the opposite direction of the current rotation direction to regain the torque of the drive motor;

[0090] Then determine whether the torque of the drive motor has a sudden change;

[0091] According to the result of judging whether the torque of the driving motor has a sudden change, the driving motor is controlled to rotate alternately in forward and reverse directions until the torque of the driving motor does not have a sudden change;

[0092] Specifically, when the drum washing machine 3 runs the washing program, the torque of the driving motor is obtained to determine whether the torque of the driving motor has a sudden change; when the torque of the driving motor suddenly changes (that is, the torque rises instantly and then recovers), it can be determined that the load and the observation window 12 are squeezing each other, and at this time the driving motor is controlled to decelerate and rotate in the opposite direction; the torque of the driving motor is obtained again, and it is determined again whether the torque of the driving motor has a sudden change; when the torque of the driving motor suddenly changes, the driving motor is controlled to decelerate and rotate in the opposite direction; in this way, the direction in which the torque required by the driving motor is small is found in the forward and reverse rotation of the driving motor, the squeezing force of the load on the door body 1 is reduced, the force on the door body 1 is more evenly distributed, and the clothes are prevented from being squeezed by the observation window 12, thereby solving the problem of the door body 1 shaking due to squeezing until the washing program ends.

[0093] In summary, by optimizing the structure of the sealing assembly of the clothing inlet 311 and the washing procedure, the problem of water leakage caused by the loose seal between the door body 1 and the door seal 2 and the shaking of the door body 1 is solved, thereby improving the user experience and reducing after-sales complaints.

[0094] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. A sealing assembly for a clothes loading port (311) of a drum washing machine (3); the drum washing machine (3) comprises a housing (31), the housing (31) being provided with the clothes loading port (311); characterized in that: The sealing assembly comprises a door seal (2) and a door body (1), wherein the door seal (2) is used to be arranged at the clothing delivery opening (311), and the door body (1) is used to be arranged on the housing (31) to open or close the clothing delivery opening (311); The door body (1) comprises a door shell (11) and an observation window (12), wherein the observation window (12) is arranged on the door shell (11); a sealing structure is provided at one end of the door seal (2) close to the door shell (11), wherein the sealing structure comprises at least a front sealing lip (21) and a rear sealing lip (22) arranged opposite to each other along the axial direction of the door seal (2); When the door body (1) closes the clothing delivery port (311), the front sealing lip (21) and the rear sealing lip (22) are arranged around the outside of the observation window (12), and both the front sealing lip (21) and the rear sealing lip (22) are interference-fitted with the observation window (12); A cavity (13) is formed between the door shell (11) and the observation window (12); the door shell (11) is formed with an exhaust port communicating with the cavity (13); the observation window (12) is formed with a vent (131) communicating with the cavity (13); the vent (131) is close to the sealing structure; The sealing assembly is configured such that when the door body (1) closes the clothing delivery port (311), the air in the cavity (13) can be discharged to the outside of the cavity (13) through the exhaust port, and under the negative pressure of the vent (131), the front sealing lip (21) and / or the rear sealing lip (22) are adsorbed on the observation window (12).

2. The sealing assembly according to claim 1, wherein: A supporting rib (23) is formed between the door seal (2) and the front sealing lip (21), and / or a supporting rib (23) is formed between the door seal (2) and the rear sealing lip (22).

3. The sealing assembly according to claim 1, wherein: An air pump (41) is provided in the cavity (13); the inlet of the air pump (41) is connected to the cavity (13); the outlet of the air pump (41) is connected to the exhaust port via an exhaust pipe (42); a valve is connected in series to the exhaust pipe (42); and the valve can be controlled to be opened or closed.

4. The sealing assembly according to claim 1, wherein: A door shell convex rib (111) is provided on one side of the door shell (11) close to the door seal (2); the door shell convex rib (111) is an annular structure and is arranged around the observation window (12); The door seal (2) is provided with a door seal rib (24) at one end close to the door shell (11); the door seal rib (24) is an annular structure and the door seal rib (24) and the door seal (2) are coaxially arranged, or a plurality of door seal ribs (24) are provided and the plurality of door seal ribs (24) are spaced apart along the circumference of the door seal (2); When the door body (1) closes the clothing delivery opening (311), the door shell rib (111) and the door seal rib (24) abut against each other.

5. The sealing assembly according to claim 1, wherein: A contact pad (112) is also provided on one side of the door shell (11) close to the door seal (2); when the door body (1) closes the clothing delivery port (311), the contact pad (112) is used to contact the machine shell (31).

6. The sealing assembly according to claim 5, wherein: The abutment pad (112) is arranged above the observation window (12), and the abutment pad (112) is made of elastic material.

7. A drum washing machine (3), characterized in that: The invention comprises a housing (31), a drum (32), a driving motor and a sealing assembly according to any one of claims 1 to 6; the drum (32) is rotatably arranged inside the housing (31); the housing (31) is provided with a clothing delivery port (311) at a position corresponding to the drum opening of the drum (32); the driving motor and the drum (32) are drivingly connected; the door seal (2) is arranged at the clothing delivery port (311); and the door body (1) is rotatably arranged on the housing (31); When the door body (1) is close to the door seal (2) and the sealing structure is interference-fitted with the observation window (12), the clothing delivery port (311) is closed; When the door body (1) moves away from the door seal (2), the clothing loading port (311) is opened.

8. A method for controlling a drum washing machine (3), characterized in that: The drum washing machine (3) is the drum washing machine (3) according to claim 7; the drum washing machine (3) is provided with a washing program, and when the drum washing machine (3) runs the washing program, the control method comprises: Controlling the rotation of the driving motor and obtaining the torque of the driving motor in real time; The direction and / or speed of the drive motor are controlled according to the torque of the drive motor.

9. The control method of the drum washing machine (3) according to claim 8, characterized in that: The controlling the direction and / or speed of the drive motor according to the torque of the drive motor includes: Determining whether a sudden change occurs in the torque of the drive motor; When a sudden change occurs in the torque of the drive motor, the drive motor is controlled to rotate in the opposite direction of the current rotation direction to regain the torque of the drive motor; Then determining whether there is a sudden change in the torque of the drive motor; According to the result of determining whether a sudden change occurs in the torque of the drive motor, the drive motor is controlled to rotate alternately in forward and reverse directions until the torque of the drive motor does not suddenly change.

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