Roller washing machine capable of realizing self-cleaning of roller

Abstract

A drum washing machine capable of achieving self-cleaning of a drum comprises a rotatable inner drum and an outer drum arranged outside the inner drum, and is characterized in that a rotatable cleaning scraper is arranged on the outer circumferential wall of the inner drum and arranged in the axial length direction of the inner drum, and the outer drum is arranged on the outer circumferential wall of the inner drum. Only when the roller washing machine enters the self-cleaning mode, the cleaning scraper is in contact with the inner wall of the outer barrel of the roller washing machine, and the outer barrel is cleaned. By means of the design that the cleaning scraping pieces are additionally arranged on the outer side of the inner barrel, the scraping pieces can be unfolded and make mechanical contact with the outer barrel, and meanwhile water flow is driven along with the side faces of the scraping pieces to wipe the inner wall cleaning area of the outer barrel with water; according to the washing machine, the defect that in the prior art, washing and cleaning capacity is weak through water flow is overcome, intelligent self-cleaning of the washing machine barrel can be achieved, manual participation and complex disassembly cleaning are not needed any more, and meanwhile the water utilization efficiency and the cleaning effect of the washing machine in the cleaning process can be improved.

Description

Technical Field

[0001] This utility model relates to a drum washing machine, and more particularly to a drum washing machine that can achieve drum self-cleaning. Background Technology

[0002] Currently, drum washing machines are widely used, but after long-term use, they are prone to accumulating dirt and grime, and users cannot clean them themselves. They require professional technicians to come to the home and completely disassemble the machine for thorough cleaning. This can lead to secondary pollution problems for many users after long-term use of the washing machine.

[0003] To address the issue of cleaning washing machine drums, especially front-loading washing machines, the area between the inner and outer drums is the most prone to dirt buildup. Current front-loading washing machines primarily rely on water flow to rinse the area between the inner and outer drums. However, the rinsing power of water flow is actually quite weak and cannot remove contaminant residues such as lint and mold attached to the inside of the outer drum.

[0004] In the prior art, such as the Chinese utility model patent with patent number ZL201420116178.8, entitled "A Washing Machine with an Inner Drum Cleaning Device," a washing machine with an inner drum cleaning device is provided. This device cleans the outer wall of the inner drum by installing at least one inner drum cleaning device on the inner wall of the outer drum. A drive device is also provided to move the cleaning block. When cleaning of the outer wall of the inner drum is required, the drive device is activated to push the cleaning block inward and into contact with the outer wall of the inner drum. After cleaning, the cleaning block returns to its original position, disengaging from the outer wall of the inner drum. This ensures the cleanliness of the outer wall of the inner drum while avoiding unnecessary noise when cleaning is not required. However, this patent only provides cleaning for the inner drum and cannot clean the outer drum. In practical applications, the inner side of the outer drum often has residues such as lint and mold, making it more difficult to clean than the inner drum. Furthermore, the inner drum cleaning device in the aforementioned patent occupies a large space and has limited functionality.

[0005] In addition, current drum washing machines rely on water to soak clothes at the bottom of the outer tub. Water only soaks the clothes when they rotate to the bottom of the inner tub, resulting in low initial soaking efficiency.

[0006] In conclusion, the existing drum cleaning function of drum washing machines still has the aforementioned shortcomings and problems, and further improvements and refinements are needed. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a drum washing machine that is compact in structure, flexible in use, and can effectively improve the utilization rate of washing water and achieve drum self-cleaning, in light of the above-mentioned existing technology.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a drum washing machine that can achieve drum self-cleaning, the drum washing machine includes a rotatable inner drum and an outer drum disposed outside the inner drum, characterized in that: the inner drum is provided with a rotatable cleaning scraper on its outer peripheral wall, the cleaning scraper is arranged along the axial length direction of the inner drum, and only when the drum washing machine enters the drum self-cleaning mode, the cleaning scraper contacts the inner wall of the outer drum of the drum washing machine and achieves cleaning of the outer drum.

[0009] To make the overall structure compact and facilitate the installation of the cleaning scraper, preferably, the outer peripheral wall of the inner cylinder is provided with at least one groove along the axial direction, and the cleaning scraper is rotatably disposed in the groove.

[0010] In order to enable the cleaning scraper to rotate effectively, preferably, a motor with an output shaft is provided on one side of the groove; a rotatable shaft connection is provided on the other side of the groove; the cleaning scraper also includes a rotating shaft fixedly connected thereto, and one end of the rotating shaft is fixedly connected to the output shaft of the motor, and the other end of the rotating shaft is fixedly connected to the shaft connection.

[0011] In order to achieve high-precision, high-efficiency and high-reliability angle rotation control, as a further preferred option, the motor is preferably a stepper motor. Stepper motors not only have a long lifespan and high reliability, but also have a simple structure and are easy to use and maintain.

[0012] In order to ensure that all cleaning areas on the inner wall of the outer tub are covered and to avoid omissions, preferably, the two ends of the cleaning scraper extend beyond the length of the rotating shaft. The cross-section of the cleaning scraper is wing-shaped, with the middle bulging outward and the ends converging. Furthermore, the length of the cleaning scraper is adapted to the length of the inner wall of the outer tub.

[0013] To avoid noticeable bulges in the grooved area of ​​the inner drum, as a further preferred embodiment, the groove has a V-shaped cross-section, and the inner wall of the inner drum is provided with lifting ribs at the location of the groove. Thus, the lifting ribs themselves, as part of the washing drum assembly, can improve washing efficiency while also decorating the inner wall of the drum, concealing the convex portion of the groove and improving aesthetics.

[0014] To further improve the cleaning efficiency and enhance the cleaning effect of the inner wall of the outer barrel, preferably, there can be three grooves, which are evenly distributed along the circumferential direction of the outer wall of the inner barrel, and correspondingly, each groove is provided with a cleaning scraper.

[0015] The drum washing machine includes a washing mode, a spin-drying mode, and a drum self-cleaning mode. To ensure the self-cleaning effect, preferably, when the drum washing machine is in the drum self-cleaning mode, the cross-section of the cleaning scraper is set at a 90-degree angle to the tangent of the outer peripheral wall of the inner drum.

[0016] As another preferred embodiment, when the drum washing machine is in the washing mode, in order to prevent the scraper from hitting the inner wall of the outer tub while ensuring that the water flow washes the inner wall of the outer tub, the cross-section of the cleaning scraper is set at a 45-degree angle to the tangent of the outer peripheral wall of the inner tub.

[0017] As another preferred option, when the drum washing machine enters the spin-drying mode, in order to avoid friction between the scraper and the outer tub, which would affect the spin-drying efficiency, the cross-section of the cleaning scraper is set at a 15-degree angle to the tangent of the outer peripheral wall of the inner tub.

[0018] Compared with the prior art, the advantages of this utility model are as follows: by adding a cleaning scraper to the outside of the inner drum, when it is necessary to clean the inner wall of the outer drum, the scraper can be unfolded and make mechanical contact with the outer drum. The inner drum slowly rotates with the motor, and at the same time, the water flow is driven by the side of the scraper to form a water-washed wiping of the inner wall cleaning area of ​​the outer drum. The design of this application solves the problem that the existing technical solution cannot wash away the pollutant residues such as lint and mold attached to the inner side of the outer drum by relying on water flow rinsing. It can realize intelligent self-cleaning of the washing machine drum, eliminating the need for manual intervention and complicated disassembly and cleaning, and at the same time improve the water utilization efficiency and cleaning effect of the washing machine during the washing process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the washing machine drum assembly structure according to an embodiment of the present utility model.

[0020] Figure 2 This is an exploded perspective view of the washing machine drum according to an embodiment of the present utility model.

[0021] Figure 3 This is a cross-sectional view of the inner drum structure of a washing machine according to an embodiment of the present utility model.

[0022] Figure 4 This is a cross-sectional view (including partial enlargement) of the washing machine drum assembly structure according to an embodiment of the present utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1-4 The figure shown is a preferred embodiment of the present invention.

[0025] This embodiment discloses a drum washing machine capable of self-cleaning. The washing machine includes a casing, a rotatable inner drum 1 disposed inside the casing, and an outer drum 2 fitted outside the inner drum 1. Figure 1 As shown, the outer tub 2 consists of a front outer tub 21 and a rear outer tub 22, and the space between the inner tub 1 and the outer tub 2 can store washing water.

[0026] Considering that after long-term use, the inner side of the outer tub 2 will be covered with residues such as lint, which may lead to mold, in order to clean the outer tub 2, this embodiment provides a rotatable cleaning scraper 3 on the outer peripheral wall of the inner tub 1. The cleaning scraper 3 is arranged along the axial length direction of the inner tub 1.

[0027] To facilitate the installation and replacement of the cleaning scraper 3, at least one groove 11 is provided on the outer peripheral wall of the inner cylinder 1 along the axial direction, and the cross-section of the groove 11 is V-shaped; to improve cleaning efficiency, this embodiment has three grooves 11, such as... Figure 2 , Figure 4 As shown, they are evenly distributed along the circumferential direction of the outer wall of the inner cylinder 1, and correspondingly, each groove 11 is provided with a rotatable cleaning scraper 3.

[0028] In order to achieve effective rotation of the cleaning scraper 3, such as Figure 3 As shown, a motor 4 is provided on one side of the groove 11. The motor 4 has an output shaft. The motor 4 is preferably a stepper motor. Stepper motors not only have a long life and high reliability, but also have a simple structure and are easy to use and maintain. They can achieve high precision, high efficiency and high reliability in controlling the angle rotation of the cleaning scraper 3.

[0029] A rotatable shaft connection part 5 is provided on the other side of the groove 11. The cleaning scraper 3 also includes a rotating shaft 31 fixedly connected thereto. One end of the rotating shaft 31 is fixedly connected to the output shaft of the motor 4, and the other end of the rotating shaft 31 is fixedly connected to the shaft connection part 5.

[0030] In order to cover all parts of the inner wall of the outer tub 2 along its length and avoid cleaning omissions, the two ends of the cleaning scraper 3 extend beyond the length of the rotating shaft 31. The cross-section of the cleaning scraper 3 is wing-shaped, with the middle bulging outward and the ends converging. Furthermore, it is best that the length of the cleaning scraper 3 is matched with the length of the inner wall of the outer tub 2 to ensure effective cleaning of all parts of the inner wall of the outer tub 2.

[0031] Since the groove 11 is formed on the outer peripheral wall of the inner drum 1, in order to avoid the inner drum 1 having a noticeable inward protrusion at the location of the groove 11, a lifting rib 6 is provided on the inner side wall of the inner drum 1 at the location of the groove 11. Thus, the lifting rib 6 serves two purposes: firstly, as part of the washing assembly, it can improve washing efficiency; secondly, it can decorate the inner wall of the inner drum 1, covering the inward protrusion where the groove 11 is formed, thereby improving the overall aesthetics of the inner drum 1.

[0032] The core principle of a drum washing machine for cleaning clothes is: first, the washing water soaks the clothes; second, the detergent chemically removes dirt; and third, the rotation and tumbling action of the clothes. Therefore, the drum washing machine of this application includes a washing mode, a spin-drying mode, and a drum self-cleaning mode, and the rotation speeds of the inner drum 1 corresponding to the three working modes are respectively: Vspin-drying > Vwashing > Vself-cleaning.

[0033] In this application, the cleaning scraper 3 can rotate to different positions under the drive of the motor 4 in the three working modes described above. See [link to relevant documentation]. Figure 4 ;

[0034] ① When the drum washing machine enters the spin-drying mode, in order to avoid friction between the scraper blade and the outer tub 2, which would affect the spin-drying efficiency, the cleaning scraper blade 3 is rotated to position L1 under the drive of the motor 4, that is, the angle between the cross-section of the cleaning scraper blade 3 and the tangent 7 of the outer peripheral wall of the inner tub 1 is set to A = 15°.

[0035] ② When the drum washing machine enters the washing mode, in order to prevent the scraper blade from hitting the inner wall of the outer tub 2 and to ensure that the water flow washes the inner wall of the outer tub 2, the cleaning scraper blade 3 is rotated to the L2 position under the drive of the motor 4, that is, the angle between the cross-section of the cleaning scraper blade 3 and the tangent 7 of the outer peripheral wall of the inner tub 1 is set to B = 45°.

[0036] ③ When the drum washing machine enters the drum self-cleaning mode, the cleaning scraper 3 is rotated to position L3 under the drive of the motor 4, that is, the angle between the cross-section of the cleaning scraper 3 and the tangent 7 of the outer peripheral wall of the inner drum 1 is set to C = 90°.

[0037] In the L1 position, the high-speed centrifugal dehydration mode is used, and the cleaning scraper 3 is in a fully retracted state to prevent the scraper from colliding with the outer cylinder during high-speed dehydration.

[0038] Position L2 corresponds to the quick wash mode. To improve washing efficiency, the washing machine operates as follows after entering quick wash mode: water is discharged from the washing machine → the scraper blade moves to position L2 → the inner drum 1 washes at the set quick wash speed → when the inner drum 1 rotates clockwise, the water and clothes move with the drum. Since the cleaning scraper 3 forms a certain angle B = 45° with the outer wall of the inner drum 1, a water storage chamber is formed. When it rotates to a certain height, the water overflows from the other side and falls with the clothes for thorough mixing and wetting → when the inner drum 1 rotates counterclockwise, due to the gentle slope of the inner drum 1 lifting ribs 6, the clothes will remain at the bottom and can further contact the water; therefore, through three-dimensional water flow wetting, the washing machine's cleaning efficiency can be effectively improved.

[0039] Position L3 corresponds to the drum intelligent self-cleaning mode. When the user selects the drum self-cleaning mode, the cleaning scraper 3 rotates to position L3 under the drive of motor 4, which can mechanically scrape and clean the outer drum 2. After entering the drum self-cleaning mode, the working process of the washing machine is as follows: the washing machine outputs water → the cleaning scraper 3 moves to position L3 → the inner drum 1 performs self-cleaning according to the set drum self-cleaning speed and performs periodic forward and reverse rotation to thoroughly clean the inside of the outer drum 2.

[0040] This application addresses the shortcomings of existing technologies that rely primarily on water flow for rinsing, which is often weak. By adding a cleaning scraper 3 to the outside of the inner drum 1, this design effectively removes residual contaminants adhering to the inside of the outer drum 2, enabling intelligent self-cleaning of the washing machine drum and eliminating the need for complex manual disassembly and cleaning. Furthermore, the cleaning scraper 3 can be adjusted to different rotation angles for different operating modes. In particular, during the washing mode, it solves the problem of low initial immersion efficiency caused by relying on water to soak clothes at the bottom of the outer drum in drum-type washing machines, where water only soaks the clothes when they rotate to the bottom with the inner drum 1. This design improves the washing efficiency of the washing machine and enhances water efficiency.

[0041] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A drum washing machine capable of self-cleaning, the drum washing machine comprising a rotatable inner drum (1) and an outer drum (2) disposed outside the inner drum (1), characterized in that: The inner drum (1) is provided with a rotatable cleaning scraper (3) on its outer peripheral wall. The cleaning scraper (3) is arranged along the axial length direction of the inner drum (1). Only when the drum washing machine enters the drum self-cleaning mode, the cleaning scraper (3) contacts the inner wall of the outer drum (2) of the drum washing machine and cleans the outer drum (2).

2. The drum washing machine capable of self-cleaning the drum according to claim 1, characterized in that: The outer peripheral wall of the inner cylinder (1) is provided with at least one groove (11) along the axial direction, and the cleaning scraper (3) is rotatably disposed in the groove (11).

3. The drum washing machine capable of self-cleaning the drum according to claim 2, characterized in that: A motor (4) is provided on one side of the groove (11), the motor (4) having an output shaft, and a rotatable shaft connection part (5) is provided on the other side of the groove (11); the cleaning scraper (3) also includes a rotating shaft (31) fixedly connected thereto, and one end of the rotating shaft (31) is fixedly connected to the output shaft of the motor (4), and the other end of the rotating shaft (31) is fixedly connected to the shaft connection part (5).

4. The drum washing machine capable of self-cleaning the drum according to claim 3, characterized in that: The motor (4) is a stepper motor.

5. The drum washing machine capable of self-cleaning the drum according to claim 3, characterized in that: The cleaning scraper (3) extends beyond the length of the rotating shaft (31) at both ends. The cross-section of the cleaning scraper (3) is wing-shaped with the middle convex and the ends converging. Furthermore, the length of the cleaning scraper (3) is adapted to the length of the inner wall of the outer barrel (2).

6. The drum washing machine capable of self-cleaning the drum according to claim 2, characterized in that: The groove (11) has a V-shaped cross section, and the inner wall of the inner cylinder (1) is provided with lifting ribs (6) at the location of the groove (11).

7. The drum washing machine capable of self-cleaning the drum according to claim 2, characterized in that: There are three grooves (11), which are evenly distributed along the circumferential direction of the outer peripheral wall of the inner cylinder (1). Correspondingly, each groove (11) is provided with a cleaning scraper (3).

8. The drum washing machine capable of self-cleaning the drum according to claim 1, characterized in that: The drum washing machine includes a washing mode, a spin-drying mode and a drum self-cleaning mode. When the drum washing machine enters the drum self-cleaning mode, the cross-section of the cleaning scraper (3) is set at 90 degrees to the tangent (7) of the outer peripheral wall of the inner drum (1).

9. The drum washing machine capable of self-cleaning the drum according to claim 8, characterized in that: When the drum washing machine is in the washing mode, the cross-section of the cleaning scraper (3) is set at a 45-degree angle to the tangent (7) of the outer peripheral wall of the inner drum (1).

10. The drum washing machine capable of self-cleaning the drum according to claim 8, characterized in that: When the drum washing machine is in the spin-drying mode, the cross-section of the cleaning scraper (3) is set at 15 degrees to the tangent (7) of the outer peripheral wall of the inner drum (1).

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