A drum washing machine

Abstract

The present invention discloses a drum washing machine, comprising: a casing, wherein a feed opening is provided on a front panel of the casing; an outer drum, disposed within the casing, with the outer drum opening of the outer drum facing the feed opening; an inner drum, rotatably disposed within the outer drum, capable of independently containing washing water during washing; and a door, openably and closably mounted on the feed opening of the front panel; the door comprising an outer cover for sealing the feed opening, an outer drum cover for sealing the outer drum opening, and an inner drum cover for sealing the inner drum opening, the outer cover being fixedly connected to the outer drum cover, and the inner drum cover being rotatably connected to the outer cover and / or the outer drum cover via a rotating assembly. The present invention addresses the structural characteristics of different components of the washing machine and simultaneously solves the sealing problems of the feed opening, the outer drum opening, and the inner drum opening through an integrated door. Furthermore, the inner drum cover and the inner drum opening are fixedly connected and rotate synchronously, resulting in a better sealing effect, stronger sealing stability, and a longer sealing life than a dynamic sealing method.

Description

Technical Field

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

[0002] In the prior art, a drum washing machine generally includes an inner drum and an outer drum that are nested with each other. The outer drum is sealed for holding water, and the inner drum is used to hold clothes and to wash the clothes by rotating the inner drum. At the same time, a dehydration hole is provided on the inner drum, so that the water in the outer drum flows into the inner drum through the dehydration hole to soak the clothes in the inner drum, and the water in the inner drum flows out to the outer drum through the dehydration hole. When the inner drum rotates at high speed, the water on the clothes in the inner drum is discharged to the outer drum through the dehydration hole, thereby achieving the purpose of washing the clothes.

[0003] However, since the inner drum and the outer drum are nested together, dirt easily accumulates between the inner and outer drums during use of the washing machine. At the same time, since the inner and outer drums are nested together, users cannot clean the outer wall of the inner drum and the inner wall of the outer drum, which increases the bacteria inside the washing machine, reduces the washing efficiency of the washing machine, and reduces the cleanliness of the clothes after washing.

[0004] To address the above-mentioned issues, several patents have been proposed, such as the Chinese invention patent application number 201410215346.3, entitled "A Drum Washing Machine." This invention relates to a drum washing machine comprising a housing, an inner drum and an outer drum disposed therein, a door seal disposed between the outer drum and the housing, the inner drum connected to a drive device, the inner drum being a non-porous inner drum having a tapered shape with a small diameter at the bottom and a large diameter at the mouth, the mouth of the inner drum converging inwardly in an arc, the door seal being provided with a water inlet conduit, one end of which is connected to a rapid washing water heating device, the other end of which passes through the door seal and extends into the inner drum, the outer drum being provided with a drain port and a water pressure detection device. As can be seen from the above technical solution, the inner drum of this invention is a non-porous inner drum, water is introduced into the inner drum via the water inlet conduit disposed on the door seal, and water is drained during the dehydration process by virtue of the shape of the inner drum itself. This prevents water from accumulating between the inner and outer drums, significantly saving washing water.

[0005] The above invention provides a drum washing machine with a non-porous inner drum, which solves the problems of water waste and dirt accumulation between the inner drum and the outer drum. However, since the inner drum is a non-porous inner drum, in order to hold the washing water, the washing machine door needs to maintain dynamic sealing contact with the drum mouth of the inner drum. However, the dynamic sealing contact has problems such as low stability and effectiveness and deterioration of sealing performance over time.

[0006] In view of this, how to solve the problem of sealing the drum opening of the non-porous inner drum of the drum washing machine, the present invention is specially proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drum washing machine with no water between the inner and outer drums, which can effectively solve the problem of sealing and containing water in the inner drum.

[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, comprising:

[0010] The casing has a delivery port on its front panel;

[0011] The outer cylinder is arranged in the casing, and the outer cylinder opening of the outer cylinder is opposite to the feeding opening;

[0012] The inner drum is rotatably arranged in the outer drum and can independently hold washing water during washing;

[0013] and a door, which is openably mounted on the delivery port on the front panel;

[0014] The machine door includes an outer cover for sealing the feeding port, an outer cylinder cover for sealing the outer cylinder port, and an inner cylinder cover for sealing the inner cylinder port. The outer cover is fixedly connected to the outer cylinder cover, and the inner cylinder cover is rotatably connected to the outer cover and / or the outer cylinder cover through a rotating assembly.

[0015] Furthermore, a bearing seat is provided on the inner wall of the outer cover, and the rotating assembly includes a rotating bearing installed in the bearing seat and a rotating shaft sleeved in the inner ring of the rotating bearing. The bearing seat passes through the outer cylinder cover, and the rotating shaft is fixedly connected to the inner cylinder cover.

[0016] Furthermore, a dynamic sealing oil seal is provided in the opening of the bearing seat to maintain dynamic sealing contact with the rotating shaft, and a sealing ring is provided between the outer peripheral wall of the bearing seat and the outer cylinder cover.

[0017] Furthermore, the end of the rotating shaft is fixedly connected to the center position of the inner cylinder cover through a fastening screw, and a screw sealing ring is provided between the fastening screw and the fastening hole on the inner cylinder cover.

[0018] Furthermore, an inner drum seal is provided on the inner drum opening. When the machine door is closed, the inner drum cover is sealed on the inner drum opening and maintains sealing contact with the inner drum seal, forming a water storage chamber that can independently hold washing water.

[0019] Furthermore, the inner cylinder seal comprises an inner cylinder sleeve portion sleeved on the outer peripheral wall of the inner cylinder opening and an inner cylinder sealing portion extending into the inner cylinder opening and in sealing contact with the peripheral wall of the inner cylinder cover;

[0020] Preferably, the inner cylinder sleeve portion is sleeved on the outer peripheral wall of the inner cylinder opening through a clamp.

[0021] Furthermore, a sealing decorative plate is fixedly installed on the outer cylinder opening, and when the machine door is closed, the outer cylinder cover maintains sealing contact with the sealing decorative plate through the sealing mechanism.

[0022] Furthermore, the sealing mechanism includes an outer cylinder sealing member provided on the cylinder opening of the outer cylinder. When the door is closed, the outer cylinder sealing member maintains an annular sealing contact with the outer cylinder cover.

[0023] Furthermore, the outer cylinder seal includes a fitting portion and a sealing portion. An annular sealing groove is provided on the outer wall of the cylinder mouth of the outer cylinder. The sealing decorative plate is fixedly mounted on the outer wall of the cylinder mouth of the outer cylinder through a connecting piece, and the fitting portion is squeezed into the sealing groove. When the machine door is closed, the sealing portion maintains an annular sealing contact with the outer cylinder cover.

[0024] Furthermore, the sealing mechanism includes an elastic sealing ring provided on the outer cover, and when the door is closed, the elastic sealing ring maintains an annular sealing contact with the outer surface of the sealing decorative plate;

[0025] Preferably, a magnet is provided on the side of the elastic sealing ring in contact with the sealing decorative plate. When the door is closed, the magnet is adsorbed on the sealing decorative plate so that the elastic sealing ring maintains an annular sealing contact with the outer surface of the sealing decorative plate.

[0026] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0027] The door of the present invention comprises an outer cover for sealing the loading port, an outer drum cover for sealing the outer drum opening, and an inner drum cover for sealing the inner drum opening. The outer cover is fixedly connected to the outer drum cover, and the inner drum cover is rotatably connected to the outer cover and / or the outer drum cover via a rotating assembly. In view of the structural characteristics of different components of the washing machine, the sealing problems of the loading port, the outer drum opening, and the inner drum opening are solved simultaneously through the integrated door. Moreover, the inner drum cover and the inner drum opening are fixedly connected and rotate synchronously. Compared with the dynamic sealing method, the sealing effect is good, the sealing stability is strong, and the sealing life is longer.

[0028] 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

[0029] 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:

[0030] Figure 1 2 is a schematic structural diagram of a drum washing machine according to an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 Cross-section along the AA direction;

[0032] Figure 3 This is an enlarged view of the assembly of the inner cylinder seal and the outer cylinder seal according to an embodiment of the present invention;

[0033] Figure 4 It is an enlarged view of the assembly between the outer cover, outer cylinder cover and inner cylinder cover in an embodiment of the present invention.

[0034] Figure: 1. Control panel; 2. Casing; 3. Inlet; 4. Front panel; 5. Foot; 6. Outer cover; 7. Outer drum cover; 8. Detergent dispenser; 9. Rotating shaft; 10. Rotating shaft seat; 11. Rotating shaft seat screw; 12. Water inlet channel; 13. Lifting rib; 14. Inner drum; 15. Outer drum; 16. Drive shaft; 17. Drive motor; 18. Locking seat screw; 19. Locking hook; 20. Front counterweight ring of outer drum; 21. Sealing trim; 22. Outer drum seal; 23. Inner drum seal. 24. Blocking part; 25. Fitting part; 26. Flanging; 27. Sealing part; 28. Fitting part; 29. ​​Sealing groove; 30. Connecting piece; 31. Countersunk groove; 32. Inner tube cover; 33. Inner tube sealing part; 34. Inner tube fitting part; 35. Clamp; 36. Rotating bearing; 37. Outer ring; 38. Bracket; 39. Ball; 40. Inner ring; 41. Bearing seat; 42. Rotating shaft; 43. Fastening screw; 44. Dynamic sealing oil seal; 45. Sealing ring; 46. Elastic sealing ring.

[0035] 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

[0036] 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.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "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.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may 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.

[0039] like Figures 1 to 4 As shown, the present invention provides a drum washing machine, comprising:

[0040] The housing 2 has a front panel 4 with a feed port 3;

[0041] The outer cylinder 15 is disposed in the housing 2, and the outer cylinder opening of the outer cylinder 15 is opposite to the feeding port 3;

[0042] The inner drum 14 is rotatably disposed in the outer drum 15 and can independently hold washing water during washing;

[0043] and a door, which is openably and closably mounted on the delivery port 3 of the front panel 4;

[0044] The machine door includes an outer cover 6 for covering the feeding port, an outer cylinder cover 7 for covering the outer cylinder port, and an inner cylinder cover 32 for covering the inner cylinder port. The outer cover 6 is fixedly connected to the outer cylinder cover 7, and the inner cylinder cover 32 is rotatably connected to the outer cover 6 and / or the outer cylinder cover 7 through a rotating assembly.

[0045] The inner drum 14 of this embodiment is a non-porous inner drum without dehydration holes on the drum wall. During washing, the inner drum 14 is independently filled with washing water. The inner drum 14 rotates to wash clothes, and the inner drum 4 is independently filled with water. This solves the problem of washing water in the existing washing machine entering between the inner drum and the outer drum. As time accumulates, the outer wall of the inner drum and the inner wall of the outer drum are prone to "hiding dirt and grime".

[0046] The outer drum of an existing drum washing machine is primarily used to hold water. Since the outer drum is stationary, sealing is generally achieved by sealing the outer drum with the washing machine body. However, the drum washing machine of this embodiment creatively designs the inner drum 14 as a non-porous inner drum for holding washing water. Since the inner drum 14 is placed horizontally, this embodiment requires sealing the inner drum opening of the inner drum 14. Therefore, the door of this embodiment includes an outer cover 6 for sealing the inlet, an outer drum cover 7 for sealing the outer drum opening, and an inner drum cover 32 for sealing the inner drum opening. The outer cover 6 is fixedly connected to the outer drum cover 7, and the inner drum cover 32 is rotatably connected to the outer cover 6 and / or the outer drum cover 7 via a rotating assembly. In view of the structural characteristics of different components of the washing machine, the integrated door simultaneously solves the sealing problems of the inlet, outer drum opening, and inner drum opening. Furthermore, the inner drum cover 32 is fixedly connected to the inner drum opening, and the two rotate synchronously. Compared with dynamic sealing methods, this provides better sealing effect, stronger sealing stability, and longer sealing life.

[0047] As an implementation method of this embodiment, Figure 2 and Figure 4 As shown, in this embodiment, a bearing seat 41 is provided on the inner wall of the outer cover 6. The rotating assembly includes a rotating bearing 36 mounted within the bearing seat 41 and a rotating shaft 42 sleeved within the inner ring of the rotating bearing 36. The bearing seat 41 passes through the outer cylinder cover 7, and the rotating shaft 42 is fixedly connected to the inner cylinder cover 32. In this embodiment, relative rotation between the inner cylinder cover 32 and the outer and outer cylinder covers 6 and 7 is achieved through the rotating bearing 36, resulting in a simple and stable structure.

[0048] Furthermore, the rotating bearing 36 of this embodiment includes an outer ring 37, an inner ring 40, a bracket 38 arranged between the inner ring 40 and the outer ring 37, and a ball 39 arranged on the bracket 38. The outer ring 37 of this embodiment has an interference fit with the mounting hole of the bearing seat 41, and the rotating shaft 42 of this embodiment has an interference fit with the inner ring 40.

[0049] Furthermore, a dynamic sealing oil seal 44 is provided in the opening of the bearing seat 41 described in this embodiment to maintain dynamic sealing contact with the rotating shaft 42, and a sealing ring 45 is provided between the outer peripheral wall of the bearing seat 41 and the outer cylinder cover 7. In this way, water in the inner cylinder 14 can be prevented from seeping out through the connection gap and flowing into the machine door.

[0050] In order to achieve the connection between the rotating shaft 42 and the inner cylinder cover 32, the end of the rotating shaft 42 in this embodiment is fixedly connected to the center position of the inner cylinder cover 32 by a fastening screw 43, and a screw sealing ring is provided between the fastening screw 43 and the fastening hole on the inner cylinder cover 32.

[0051] In order to solve the sealing connection between the inner drum cover 32 and the inner drum opening, an inner drum seal 23 is provided on the inner drum opening described in this embodiment. When the machine door is closed, the inner drum cover 32 covers the inner drum opening and maintains sealing contact with the inner drum seal 23, forming a water storage chamber that can independently hold washing water.

[0052] Furthermore, the inner cylinder seal 23 includes an inner cylinder sleeve portion 34 sleeved on the outer peripheral wall of the inner cylinder opening and an inner cylinder sealing portion 33 extending into the inner cylinder opening and sealingly contacting the peripheral wall of the inner cylinder cover 32. Preferably, the inner cylinder sleeve portion 34 is sleeved on the outer peripheral wall of the inner cylinder opening via a clamp 35.

[0053] In order to solve the sealing problem between the outer cylinder cover 7 and the outer cylinder opening, a sealing decorative plate 21 is fixedly installed on the outer cylinder opening in this embodiment. When the door is closed, the outer cylinder cover 7 maintains sealing contact with the sealing decorative plate 21 through the sealing mechanism.

[0054] This embodiment of the drum washing machine eliminates the conventional window gasket seal at the outer drum opening. Instead, a sealing panel 21 is provided. When the door is closed, a sealing mechanism maintains sealing contact with the sealing panel 21, sealing the outer drum opening. This eliminates the problem of dirt accumulation on the window gasket of conventional drum washing machines. Furthermore, the sealing panel 21 of this embodiment blocks the structure at the outer drum opening, making it cleaner and more aesthetically pleasing, enhancing the user experience.

[0055] As one implementation of this embodiment, the sealing mechanism includes an outer cylinder seal 22 disposed on the outer cylinder opening. When the appliance door is closed, the outer cylinder seal 22 maintains an annular sealing contact with the outer cylinder cover 7. In this embodiment, the outer cylinder seal 22 directly maintains an annular sealing contact with the inner wall surface of the outer cylinder cover 7 to achieve sealing of the outer cylinder opening by the appliance door 6. The outer cylinder seal 22 has a simpler structure and is less susceptible to dirt accumulation than a window gasket. Furthermore, the seal is enhanced by squeezing against the outer cylinder opening when the appliance door 6 is closed.

[0056] Furthermore, the outer cylinder seal 22 includes a fitting portion 28 and a sealing portion 27. An annular sealing groove 29 is provided on the outer wall of the cylinder opening of the outer cylinder. The sealing decorative plate 21 is fixedly mounted on the outer wall of the cylinder opening of the outer cylinder 15 through a connector 30, while squeezing the fitting portion 28 into the sealing groove 29. When the machine door is closed, the sealing portion 27 maintains an annular sealing contact with the outer cylinder cover 7.

[0057] In this embodiment of the drum washing machine, during installation of the sealing trim 21, the mating portion 28 of the outer drum seal 22 is squeezed into the sealing groove 29, achieving simple and reliable assembly. In this embodiment, the sealing groove 29 is located on the edge of the outer drum 15, corresponding to the back of the sealing trim 21. The mating portion 28 is an annular elastic member that is squeezed into the sealing groove 29 during installation of the sealing trim 21.

[0058] Furthermore, the sealing trim plate 21 of this embodiment has a recessed groove 31 with a mounting hole defined therein. The connector 30 passes through the mounting hole and is secured within the recessed groove 31. The outer cylinder seal 22 includes a blocking portion 24 extending into the recessed groove 31 to block the connector 30. After the connector 30 is installed, the blocking portion 24 of this embodiment elastically recovers its deformation, shielding the connector 30 and the recessed groove 31, creating a visual illusion of no connector and enhancing the aesthetics of the seal.

[0059] Preferably, the connecting member 30 described in this embodiment can be a fastening screw.

[0060] Furthermore, the edge of the sealing trim plate 21 of this embodiment has a flange 26, and the recessed groove 31 is located inside the flange 26. The outer cylinder seal 22 includes a sleeve portion 25, which has an open groove inside the sleeve portion 25 that sleeves onto the flange 26. One side of the open groove extends horizontally to form a blocking portion 24, while the other side of the open groove extends to form a mating portion 28 and a sealing portion 27. The flange 26 on the edge of the trim plate 21 of this embodiment increases the overall strength of the trim plate 21 and prevents deformation when the outer cylinder 15 vibrates. At the same time, the outer cylinder seal covers the flange 26, preventing damage caused by user contact with the flange 26 and enhancing the overall aesthetics of the sealing trim plate 21.

[0061] As can be seen from the above, the drum washing machine of this embodiment eliminates the window gasket and installs the outer drum seal 22 by installing a sealing plate at the drum opening. The outer drum seal 22 maintains sealing contact with the outer drum cover 7 when the machine door is closed, thereby achieving the outer drum cover 7 sealing the drum opening of the outer drum. At the same time, the drum washing machine of this embodiment needs to further improve the sealing between the outer cover 6 and the sealing plate 21 to enhance the sealing effect. Specifically, as shown in FIG. Figure 2 As shown, the sealing mechanism described in this embodiment includes an elastic sealing ring 46 provided on the outer cover 6 . When the door 6 is closed, the elastic sealing ring 46 maintains an annular sealing contact with the outer surface of the sealing decorative plate 21 .

[0062] Furthermore, the elastic sealing ring 46 includes a sealing body having a hollow elastic deformation chamber. Thus, when the door is closed, the sealing body is squeezed and elastically deformed to maintain sealing contact. Preferably, the sealing body of this embodiment has multiple, mutually separated elastic deformation chambers, which increases the range of elastic deformation and ensures a good sealing effect.

[0063] The elastic sealing ring 46 described in this embodiment includes a buckle integrally formed with the sealing body. The outer cover 5 has a slot, and the buckle is snapped into the slot, thereby achieving the installation of the elastic sealing ring 46 on the outer cover 6.

[0064] Furthermore, in this embodiment, a magnet is provided on the side of the elastic sealing ring 46 that contacts the sealing trim 21. When the appliance door is closed, the magnet 34 is attracted to the sealing trim 21, maintaining an annular sealing contact between the elastic sealing ring 46 and the outer surface of the sealing trim 21. The sealing trim 21 of this embodiment is made of metal. The magnet provided on the elastic sealing ring 46 of this embodiment allows the magnet 34 to attract the sealing trim 21 when the appliance door is closed, maintaining the closed state and enhancing the sealing effect between the appliance door and the elastic sealing ring 46.

[0065] In this embodiment, the outer cylinder cover 7 maintains sealing contact with the cylinder opening of the outer cylinder 15 via the outer cylinder seal 22 for sealing, and the outer cover 6 maintains sealing contact with the sealing decorative plate 21 for sealing via the elastic sealing ring 46 for sealing. Thus, when the door 6 is closed, at least two seals are formed from the inside out, between the cylinder opening of the outer cylinder 15 and the outer cylinder cover 7, and between the sealing decorative plate 21 and the outer cover 6, thereby ensuring the sealing effect of the door on the cylinder opening of the outer cylinder 15 and preventing water leakage.

[0066] like Figure 2 As shown, the outer cover 6 of this embodiment is rotatably mounted on the front panel 4 of the casing 2, and the shaft seat 10 is fixedly mounted on the front panel located on the side of the loading port 3 by the shaft seat screw 11. The shaft 9 is installed on one side of the outer cover 6, and the shaft 9 is rotatably mounted on the shaft seat 10, thereby realizing that the outer cover 6 can be rotatably mounted on the front panel 4.

[0067] In this embodiment, a lock seat 19 is fixedly installed on the front panel on the side opposite to the delivery port 3 and the rotating shaft seat 10 by a lock seat screw 18, and a lock hook is installed on the side opposite to the rotating shaft 9 on the outer cover 6.

[0068] The elastic sealing ring 46 of this embodiment is arranged corresponding to the rotating shaft 9 and the locking hook, so that after the outer cover 6 is closed and locked, the elastic sealing ring 46 can be better acted on to perform contact sealing.

[0069] As an implementation of this embodiment, an outer cylinder front counterweight ring 20 is installed at the cylinder mouth of the outer cylinder 15 of this embodiment, and the sealing decorative plate 21 blocks the outer cylinder front counterweight ring 20 .

[0070] The casing 2 of the drum washing machine of this embodiment includes: an upper panel, a front panel 4, a back panel and a bottom panel. The bottom panel is fixed with feet 5 for supporting the entire washing machine. A control panel 1 and a detergent dispenser box 8 are set on the upper part of the front panel 4.

[0071] The drum washing machine of this embodiment has an outer drum 15 within its casing, with an inner drum 14 coaxially positioned within it. The outer drum's primary purpose is to collect drainage from the inner drum 14 and the drainage from the high-speed centrifugation of the inner drum 14. The inner drum 14 rotates and is preferably equipped with lifting ribs 13 to continuously lift, drop, and shake the clothes for a clean finish. The inner drum 14 is non-porous.

[0072] The outer cylinder 15 has a central mounting hole, on which a bearing structure is installed and fixed. A drive shaft 16, which is tightly connected to the inner cylinder 14, passes through the bearing. The drive shaft 16 is connected to a drive motor 17. The drive shaft 16 has a hollow water inlet channel 12, and a dynamic seal is designed between the water inlet pipe and the water inlet channel 12.

[0073] The driving motor 17 in the diagram of this embodiment is illustrated using a direct drive motor as an example, and a similar structure also has water inlet at the center of the shaft, which is not illustrated again.

[0074] The non-porous inner drum of this embodiment of a drum washing machine has a tapered shape, with the centrifugal valve positioned at the maximum point of the taper. Centrifugal force forces the centrifugal water along the tapered edge toward the centrifugal valve, where it converges. This structure effectively achieves efficient dehydration and centrifugal drainage in the non-porous inner drum.

[0075] The centrifugal valve of this embodiment can be opened at a certain rotation speed N, such as 100 rpm.

[0076] The drum washing machine of this embodiment starts draining and dehydrating after washing or rinsing is completed.

[0077] The drainage process of the drum washing machine of this embodiment is as follows:

[0078] When the eccentricity is less than M1, the driving motor drives the inner drum to run at a first speed and maintains it for a certain time t1, and the speed is N1, N1>N.

[0079] If N is 110-400 rpm, it is preferably 170±50 rpm, and more preferably 150±20 rpm.

[0080] The range of t1 is between 0.1-5 minutes, preferably 1-2 minutes.

[0081] At this time, most of the water in the inner drum can be discharged from the inner drum, and the water load can be effectively distributed, effectively achieving evenly distributed load, reducing eccentricity, and reducing the vibration of subsequent high-speed dehydration.

[0082] The dehydration process of the drum washing machine of this embodiment:

[0083] When the speed gradually increases to the rated dehydration speed (such as 1400 rpm), the centrifugal valve opens under the action of centrifugal force. The water contained in the clothes is centrifuged out and discharged by centrifugation to achieve centrifugal drainage.

[0084] 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, characterized in that: include: The casing has a delivery port on its front panel; The outer cylinder is arranged in the casing, and the outer cylinder opening of the outer cylinder is opposite to the feeding opening; The inner drum is rotatably arranged in the outer drum and can independently hold washing water during washing; and a door, which is openably mounted on the delivery port on the front panel; The door comprises an outer cover for covering the feeding port, an outer cylinder cover for covering the outer cylinder opening, and an inner cylinder cover for covering the inner cylinder opening. The outer cover is fixedly connected to the outer cylinder cover, and the inner cylinder cover is rotatably connected to the outer cover and / or the outer cylinder cover via a rotating assembly. A sealing decorative plate is fixedly mounted on the outer cylinder opening, and the sealing decorative plate is fixedly mounted on the outer wall of the cylinder opening of the outer cylinder via a connecting piece. When the door is closed, the outer cylinder cover maintains sealing contact with the sealing decorative plate via a sealing mechanism. The sealing decorative plate has a recessed groove with a mounting hole provided in the recessed groove, and the connecting piece is fixed in the recessed groove through the mounting hole; the sealing mechanism includes an outer cylinder seal provided on the cylinder mouth of the outer cylinder, and the outer cylinder seal includes a blocking portion extending into the recessed groove for blocking the connecting piece; when the machine door is closed, the outer cylinder seal maintains an annular sealing contact with the outer cylinder cover.

2. The drum washing machine according to claim 1, characterized in that: A bearing seat is provided on the inner wall of the outer cover. The rotating assembly includes a rotating bearing installed in the bearing seat and a rotating shaft sleeved in the inner ring of the rotating bearing. The bearing seat passes through the outer cylinder cover, and the rotating shaft is fixedly connected to the inner cylinder cover.

3. The drum washing machine according to claim 2, characterized in that: A dynamic sealing oil seal is arranged in the opening of the bearing seat to maintain dynamic sealing contact with the rotating shaft, and a sealing ring is arranged between the outer peripheral wall of the bearing seat and the outer cylinder cover.

4. The drum washing machine according to claim 2, characterized in that: The end of the rotating shaft is fixedly connected to the center position of the inner cylinder cover through a fastening screw, and a screw sealing ring is arranged between the fastening screw and the fastening hole on the inner cylinder cover.

5. The drum washing machine according to any one of claims 1 to 4, characterized in that: An inner drum seal is provided on the inner drum opening. When the machine door is closed, the inner drum cover seals the inner drum opening and maintains sealing contact with the inner drum seal to form a water storage chamber that can independently store washing water.

6. The drum washing machine according to claim 5, characterized in that: The inner cylinder sealing member comprises an inner cylinder sleeve portion sleeved on the outer peripheral wall of the inner cylinder opening and an inner cylinder sealing portion extending into the inner cylinder opening and in sealing contact with the peripheral wall of the inner cylinder cover.

7. The drum washing machine according to claim 6, characterized in that: The inner cylinder sleeve portion is sleeved on the outer peripheral wall of the inner cylinder opening through a clamp.

8. The drum washing machine according to any one of claims 1 to 4, characterized in that: The outer cylinder seal includes a fitting portion and a sealing portion. An annular sealing groove is provided on the outer wall of the cylinder mouth of the outer cylinder, and the sealing decorative plate squeezes the fitting portion into the sealing groove. When the machine door is closed, the sealing portion maintains an annular sealing contact with the outer cylinder cover.

9. The drum washing machine according to any one of claims 1 to 4, characterized in that: The sealing mechanism comprises an elastic sealing ring arranged on the outer cover. When the door is closed, the elastic sealing ring maintains an annular sealing contact with the outer surface of the sealing decorative plate.

10. The drum washing machine according to claim 9, characterized in that: A magnet is provided on the side of the elastic sealing ring in contact with the sealing decorative plate. When the door is closed, the magnet is adsorbed on the sealing decorative plate so that the elastic sealing ring maintains an annular sealing contact with the outer surface of the sealing decorative plate.

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