Sealing assembly, roller washing machine and control method

Abstract

The invention provides a sealing assembly, a roller washing machine and a control method, the sealing assembly comprises a door seal and a door body, the door seal is used for being arranged at a clothes putting opening, and the door body is used for being arranged on a machine shell to open or close the clothes putting opening; the door body comprises a door shell and an observation window, and the observation window is arranged on the door shell; a sealing structure is arranged at the end, close to the door shell, of the door seal and comprises a front sealing lip and a rear sealing lip which are oppositely arranged in the axial direction of the door seal. When the door body closes the clothes putting opening, the front sealing lip and the rear sealing lip are arranged on the outer side of the observation window in a surrounding mode, and the front sealing lip and the rear sealing lip are both in 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, and the rear sealing lip and the observation window are tightly and uniformly sealed; and under the action of negative pressure, the front sealing lip is adsorbed on the observation window, so that the sealing between the front sealing lip and the observation window is tight and uniform.

Description

Technical Field

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

[0002] In recent years, the washing machine industry has developed rapidly, people's consumption level has also been increasing, and 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 inlet, 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 sealing 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 comprises a casing, and the casing is provided with a clothing inlet; the sealing assembly comprises a door seal and a door body, the door seal is used to be arranged at the clothing inlet, and the door body is used to be arranged on the casing to open or close the clothing inlet;

[0005] The door body comprises a door shell and an observation window, wherein the observation window is arranged on the door shell; a sealing structure is arranged at one end of the door seal close to the door shell, wherein the sealing structure comprises 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 supporting rib is formed between the door seal and the front sealing lip, and / or a supporting 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 connected to the cavity, the observation window is formed with a vent hole connected to the cavity, and the vent hole is close to the sealing structure;

[0009] The sealing assembly is configured as follows: 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 be opened or closed.

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

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

[0013] When the door body closes the clothing loading port, the door shell convex rib and the door seal convex 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 driving motor and any one of the sealing assemblies described above; the drum is rotatably arranged inside the casing, the casing is provided with a clothing loading port at a position corresponding to the drum opening of the drum, the driving motor is drivingly connected to the drum; the door seal is arranged at the clothing loading port, and the door body is rotatably arranged 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 to obtain the torque of the driving motor in real time;

[0021] The direction of rotation and / or the speed of rotation of the driving motor are controlled according to the torque of the driving 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 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;

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

[0026] According to the judgment result of whether the torque of the drive motor has a sudden change, the drive motor is controlled to rotate alternately in forward and reverse directions until the torque of the drive motor does not have a sudden 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 outer side 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 rear sealing lip and the observation window are tightly and evenly sealed; under the negative pressure of the vent hole, 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;

[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 abutting 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] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0032] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

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

[0034] Figure 2a 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 A schematic diagram of the axial structure of a door seal embodiment provided by the present invention;

[0038] Figure 3a A schematic diagram of the front structure of a drum washing machine according to an embodiment of the present invention;

[0039] Figure 3b 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 A schematic diagram of the assembly structure of a door body, a door seal and a housing embodiment provided by the present invention;

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

[0044] In the figure:

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

[0046] 2-door seal; 21-front sealing lip; 22-rear sealing lip; 221-radial outer section; 222-radial inner section; 23-support ribs; 24-door seal ribs; 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 is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" 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 other meanings, and "multiple" 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" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0053] The drum washing machine is different from the pulsator washing machine. The drum is placed horizontally, and the door is opened horizontally. When the door closes the clothing inlet, the door and the door seal must have a high degree of sealing. In the existing drum washing machines, the door and the door seal are not tightly sealed, which leads 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 a clothing loading port of a drum washing machine; a door seal is provided with a sealing structure, 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 both interference fit with the observation window, so that the door seal and the observation window are sealed and tightly connected, 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 Figure 1 to Figure 2e As shown, the present embodiment provides a sealing assembly for a clothing inlet 311 of a drum washing machine 3; the drum washing machine 3 comprises a casing 31 and a drum 32, the drum 32 is rotatably arranged inside the casing 31, and the casing 31 is formed with a clothing inlet 311 at a position corresponding to the drum opening of the drum 32; a user can place clothing in the drum 32 or take clothing out of the drum 32 through the clothing inlet 311; the sealing assembly comprises a door seal 2 and a door body 1, the door seal 2 is used to be arranged at the clothing inlet 311, and the door body 1 is used to be arranged on the casing 31 to open or close the clothing inlet 311;

[0057] The door body 1 includes a door shell 11 and an observation window 12, and the observation window 12 is arranged 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 through a rotating shaft, and when the door body 1 rotates around the rotating shaft, the clothing loading port 311 can be opened or closed; the observation window 12 is arranged on one side of the door shell 11 close to 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 at least includes a front sealing lip 21 and a rear sealing lip 22 which are 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 arranged coaxially 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 tightly sealed 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 escape 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 escape space 25, and the escape 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 Figure 1 to Figure 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 the present 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 deformation resistance of the front sealing lip 21 and / or the rear sealing lip 22 is improved by the support rib 23, 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 sealed tightly and evenly, thereby solving the problem in the prior art that the sealing lips are deformed and the sealing is uneven when the sealing lips of the observation window 12 and the door seal 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 the design of 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 connected to the cavity 13, and the observation window 12 is formed with a vent hole 131 connected to the cavity 13, and the vent hole 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, and negative pressure is formed in the cavity 13 and at the vent hole 131. Under the negative pressure of the vent hole 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 and the rear sealing lip 22 and the observation window 12 are tightly and evenly sealed.

[0067] Preferably, the vent hole 131 is arranged 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, and the valve can be controlled to be opened or closed;

[0070] When the door body 1 closes the clothing loading port 311 and before the drum washing machine 3 runs the washing program, the vacuum pump 41 is controlled to run 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, and 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 vacuum pump 41 is controlled to stop running 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, and the air pressure in the cavity reaches equilibrium with the air pressure in the environment where the washing machine is located. The front sealing lip 21 no longer adsorbs the observation window 12, and the user can open the door 1 at this time.

[0072] When the drum washing machine 3 is fully loaded, the drum 32 rotates, and the load squeezes the door body 1, so that the seal between the door body 1 and the door seal 2 is not tight and the door body 1 shakes. In this embodiment, 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.

[0073] A door seal convex rib 24 is provided at one end of the door seal 2 close to the door shell 11; the door seal convex rib 24 is an annular structure and the door seal convex rib 24 and the door seal 2 are coaxially arranged, or a plurality of door seal convex ribs 24 are provided and the plurality of door seal convex 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 convex rib 111 and the door seal convex rib 24 abut against each other; when the load presses the door body 1, the abutment between the door shell convex rib 111 and the door seal convex rib 24 can effectively reduce the shaking of the door body 1;

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

[0076] When the load squeezes the lower side of the door body 1, it is often easy to force the door body 1 open, resulting in failure of the seal between the door body 1 and the door seal 2 and water leakage. The present embodiment proposes that abutment pad 112 is further provided on the side of the door shell 11 close to the door seal 2; when the door body 1 closes the clothing inlet 311, the abutment pad 112 is used to abut against the machine casing 31 to prevent the lower side of the door body 1 from being forcibly opened and leaking.

[0077] Furthermore, the abutment pad 112 is detachably arranged on the door shell 11 and the position of the abutment pad 112 on the door shell 11 is adjustable; the adapted abutment pad 112 can be arranged at the adapted position of the door shell 11 according to the water leakage position and water leakage amount between the door body 1 and the door seal 2, so as to effectively prevent the lower side of the door body 1 from being forcibly opened;

[0078] Preferably, the abutment pad 112 is disposed above the observation window 12 , and the abutment pad 112 is made of an 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 both 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 hole 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 deformation resistance of the rear sealing lip 22 is improved by the support rib 23, 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 proposes a drum washing machine 3, comprising a casing 31, a drum 32, a driving motor and the sealing assembly described in any one of embodiments 1 and 2; the drum 32 is rotatably arranged inside the casing 31, and the casing 31 is formed with a clothing delivery opening 311 at a position corresponding to the drum opening of the drum 32, and the driving motor and the drum 32 are drivingly connected; the door seal 2 is arranged at the clothing delivery opening 311, and the door body 1 is rotatably arranged on the casing 31; specifically, one side of the door casing 11 is hinged to the casing 31 through a rotating shaft, and when the door body 1 rotates around the rotating shaft, the clothing delivery opening 311 can be opened or closed; an observation window 12 is arranged on one side of the door casing 11 close to the door seal 2;

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

[0083] When the door body 1 is away from the door seal 2, the clothing loading opening 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, so that the sealing between the door body 1 and the door seal 2 is reduced; therefore, by reducing the force of 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 proposes 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, and 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 of rotation and / or the speed of the drive motor are controlled according to the torque of the drive motor.

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

[0088] Determine whether there is a sudden change in the torque of the drive motor;

[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 there is a sudden change in the torque of the drive motor;

[0091] According to the judgment result of 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 changes suddenly; when the torque of the driving motor changes suddenly (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 changes suddenly; when the torque of the driving motor changes suddenly, 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, so as to reduce the squeezing force of the load on the door body 1, make the force on the door body 1 more uniform, avoid forced squeezing of the clothes and the observation window 12, and solve the problem of shaking of the door body 1 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] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structures, configurations or implementations described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent configurations included in the spirit and scope of the appended claims.

Claims

1. A sealing assembly, used for a clothing loading port (311) of a drum washing machine (3); the drum washing machine (3) comprises a casing (31), the casing (31) being provided with the clothing 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 loading opening (311), and the door body (1) is used to be arranged on the housing (31) to open or close the clothing loading 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) which are 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 the front sealing lip (21) and the rear sealing lip (22) are both interference fit with the observation window (12).

2. The sealing assembly according to claim 1, characterized in that: 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, characterized in that: 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 hole (131) communicating with the cavity (13); the vent hole (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 hole (131), the front sealing lip (21) and / or the rear sealing lip (22) are adsorbed on the observation window (12).

4. The sealing assembly according to claim 3, characterized in that: An air pump (41) is arranged 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.

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

6. The sealing assembly according to claim 1, characterized in that 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 opening (311), the contact pad (112) is used to contact the machine shell (31).

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

8. 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 7; the drum (32) is rotatably arranged inside the housing (31); the housing (31) is provided with a clothing delivery opening (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 opening (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 and the observation window (12) are in interference fit, the clothing delivery opening (311) is closed; When the door body (1) is away from the door seal (2), the clothing loading port (311) is opened.

9. 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 8; 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 to obtain the torque of the driving motor in real time; The direction of rotation and / or the speed of rotation of the driving motor are controlled according to the torque of the driving motor.

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

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