Drum washing machine

Abstract

The present application belongs to the technical field of household appliances, and particularly relates to a drum washing machine. The present application aims to solve the problem that a secondary driving module needs to be separately arranged in a main sealing door to drive a secondary drum to rotate. The drum washing machine of the present application is provided with a main drum in a main washing cavity, a main sealing door at a main clothes loading and unloading opening, and a driving device in the machine body for driving the main drum to rotate. The main sealing door comprises a main outer cover part and a main inner cover part, and the two parts define a secondary washing cavity. A secondary drum coaxial with the main drum is arranged in the secondary washing cavity. The main inner cover part is made of a non-magnetic material. The end of the main drum close to the secondary drum is provided with a first magnetic force structure, and the end of the secondary drum close to the main drum is provided with a second magnetic force structure corresponding to the first magnetic force structure. Through the above arrangement, the rotating main drum drives the secondary drum to rotate through magnetic force, and a secondary driving module for separately driving the secondary drum to rotate is not needed, so that the manufacturing is convenient, the cost is low, and the washing capacity of the secondary washing cavity is high.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and specifically relates to a drum washing machine. Background Technology

[0002] Front-loading washing machines are common laundry appliances. They are designed to mimic the principle of beating clothes with a stick, using a drive mechanism to rotate the drum. Clothes are repeatedly lifted and tumbled within the drum, and this repeated motion, combined with the action of detergent and water, cleans the clothes. In recent years, to increase washing capacity and to separate small items like socks and underwear from larger items, some front-loading washing machines have incorporated a secondary drum inside the main sealed door. This secondary drum rotates within the secondary washing chamber to wash the clothes placed inside.

[0003] Existing drum washing machines with a secondary drum inside the main sealing door have a main washing chamber inside the machine body, in which a main drum is installed. A main sealing door for sealing the main washing chamber is installed at the main clothes loading and unloading port of the machine body. A secondary washing chamber is formed inside the main sealing door, and a secondary drum is installed inside the secondary washing chamber. The main drum and the secondary drum are driven by a main drive module located in the machine body and a secondary drive module located in the main sealing door, respectively, so as to wash the clothes in the main washing chamber and the secondary washing chamber, respectively.

[0004] Existing drum washing machines with a secondary drum inside the main sealing door require a separate secondary drive module consisting of an electric motor and other electrical components inside the main sealing door to drive the secondary drum to rotate. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, specifically the need for a separate auxiliary drive module composed of a motor and other electrical components within the main sealing door to drive the auxiliary drum rotation, this invention provides a drum washing machine comprising:

[0006] The machine body has a main washing chamber inside, and a main clothes loading and unloading port connected to the main washing chamber is located on the machine body.

[0007] The main washing chamber is equipped with a main drum, and the main clothes loading and unloading port is equipped with a main sealing door for sealing the main washing chamber. The machine body is also equipped with a drive device for driving the main drum to rotate.

[0008] The main sealing door includes a main outer cover and a main inner cover. The main outer cover is connected to the machine body, and the main inner cover is fastened to the inner surface of the main outer cover. The main outer cover and the main inner cover define a secondary washing chamber, and a secondary washing chamber is arranged in the secondary washing chamber, which is coaxial with the main washing drum.

[0009] The main inner cover is made of non-magnetic material. The end of the main roller near the auxiliary roller is provided with a first magnetic structure, and the end of the auxiliary roller near the main roller is provided with a second magnetic structure corresponding to the first magnetic structure. The rotating main roller drives the auxiliary roller to rotate through the magnetic force between the first magnetic structure and the second magnetic structure.

[0010] In the preferred technical solution of the above-mentioned drum washing machine, the end of the auxiliary drum near the main drum is located inside the main washing chamber, and the first magnetic structure is located on the radial outside of the second magnetic structure of the auxiliary drum.

[0011] In the preferred technical solution of the above-mentioned drum washing machine, the first magnetic structure includes a plurality of first magnetic elements arranged at intervals along the circumference of the main drum, and the second magnetic structure includes a plurality of second magnetic elements that correspond one-to-one with the first magnetic elements. Each pair of first magnetic elements and second magnetic elements is a fan-shaped structure that corresponds to each other.

[0012] Each first magnetic element and its corresponding second magnetic element are arranged facing each other on the circumference of the auxiliary roller. The rotating main roller drives the auxiliary roller to rotate through the magnetic attraction between the first magnetic element and the second magnetic element; or, all the first magnetic elements and second magnetic elements are arranged alternately on the circumference of the auxiliary roller. The rotating main roller drives the auxiliary roller to rotate through the magnetic repulsion between the first magnetic element and the second magnetic element.

[0013] In the preferred technical solution of the above-mentioned drum washing machine, the top of the main inner cover is provided with a secondary water inlet that connects to the secondary washing chamber, and the top surface of the main clothes loading and unloading opening is provided with a secondary water inlet that is opposite to the secondary water inlet. The secondary water inlet and the secondary water inlet are spaced apart, and the opening of the secondary water inlet is greater than the opening of the secondary water inlet.

[0014] And / or, a secondary water outlet is provided on the bottom wall of the secondary washing chamber, a siphon assembly is provided inside the secondary washing chamber, the siphon assembly is located outside the secondary drum, the water outlet end of the siphon assembly is connected to the secondary water outlet, the secondary water outlet is connected to the drain pipe inside the machine body, the water inlet end of the siphon assembly is connected to the secondary washing chamber, and the siphon assembly is configured to discharge the washing water in the secondary washing chamber into the drain pipe after the liquid level in the secondary washing chamber reaches a preset position.

[0015] In the preferred technical solution of the above-mentioned drum washing machine, a main sealing ring is provided at the main clothes loading and unloading port to connect the outer wall of the machine body and the cavity wall of the main washing chamber.

[0016] The auxiliary water inlet is located on the main sealing ring; and / or, the auxiliary water outlet is located opposite the main sealing ring, with the auxiliary water outlet spaced apart from the main sealing ring, and the auxiliary water outlet is connected to the drain pipe through the main washing chamber.

[0017] In the preferred technical solution of the above-mentioned drum washing machine, the siphon assembly is a float-type siphon assembly, and the water inlet end of the float-type siphon assembly is configured to float up and down with the change of liquid level in the secondary washing chamber.

[0018] In the preferred technical solution of the above-mentioned drum washing machine, the float-type siphon assembly includes a siphon bend, a float, a hose, and a suction head.

[0019] The siphon bend is a rigid tube that corresponds to the curvature of the inner wall of the auxiliary washing chamber. The siphon bend is tightly connected to the inner wall of the auxiliary washing chamber, and the top of the inner cavity of the siphon bend is at a preset position.

[0020] The outlet of the siphon bend is connected to the secondary outlet, and the inlet of the siphon bend is connected to the outlet of the hose. The float is equipped with a water suction channel. The inlet of the hose is tightly connected to the float, and the inlet of the hose is connected to the outlet of the water suction channel. The suction head is tightly connected to the lower surface of the float, and the outlet of the suction head is connected to the inlet of the water suction channel. The inlet of the suction head faces downward and is connected to the secondary washing chamber.

[0021] In the preferred technical solution of the above-mentioned drum washing machine, the water inlet end of the suction head has a toothed structure;

[0022] And / or, the water intake channel includes a horizontal section and a vertical section. The water outlet of the horizontal section penetrates the side wall of the float and is connected to the water inlet of the hose. The water inlet of the horizontal section is connected to the water outlet of the vertical section. The water inlet of the vertical section is connected to the water outlet of the suction head. The upper end of the vertical section is its water outlet and the lower end is its water inlet.

[0023] In the preferred embodiment of the above-mentioned drum washing machine, a partition is provided between the inner wall of the secondary washing chamber and the outer wall of the secondary drum, and a gap is left between the bottom side of the partition and the bottom wall of the secondary washing chamber.

[0024] The float-type siphon assembly is located in the space between the baffle and the secondary washing chamber, and the water inlet end of the float-type siphon assembly is configured to float up and down in the space between the baffle and the secondary washing chamber.

[0025] In the preferred technical solution of the above-mentioned drum washing machine, the main washing chamber, the main drum, the auxiliary washing chamber and the auxiliary drum are all arranged at an angle, and the main clothes loading and unloading port, the main outer cover and the main inner cover are all arranged at an angle.

[0026] Those skilled in the art will understand that the drum washing machine of the present invention has a main drum arranged in the main washing chamber and an auxiliary drum coaxial with the main drum arranged in the auxiliary washing chamber defined by the main outer cover and the main inner cover of the main sealing door. A first magnetic structure is provided at the end of the main drum near the auxiliary drum, and a second magnetic structure corresponding to the first magnetic structure is provided at the end of the auxiliary drum near the main drum. A drive device inside the machine body drives the main drum to rotate, and the rotating main drum drives the auxiliary drum to rotate through the magnetic force between the first and second magnetic structures. With the above arrangement, the drive device can drive the auxiliary drum to rotate synchronously simply by driving the main drum. Only a drive device for driving the main drum needs to be arranged inside the machine body to drive both the main drum and the auxiliary drum to wash the clothes in the main and auxiliary washing chambers. There is no need to set up a separate auxiliary drive module for driving the auxiliary drum inside the main sealing door, and there is no need to introduce wires and circuits into the main sealing door, thus avoiding the problem of difficult wiring between the main sealing door and the machine body. Furthermore, without a secondary drive module inside the main sealing door, the space of the auxiliary washing chamber can be increased, the size of the auxiliary drum can be increased, and the washing capacity of the auxiliary washing chamber can be improved. Furthermore, reducing the need for a separate auxiliary drive module to drive the auxiliary roller lowers manufacturing costs. Additionally, the auxiliary roller is magnetically driven, meaning it can be stopped by a person or object touching it, enhancing safety. Attached Figure Description

[0027] A preferred embodiment of the drum washing machine of the present invention will now be described with reference to the accompanying drawings. The drawings are as follows:

[0028] Figure 1 This is a schematic diagram of an embodiment of the drum washing machine proposed in this invention;

[0029] Figure 2 This is a schematic diagram of the second magnetic structure arranged on the auxiliary drum in an embodiment of the drum washing machine proposed in this invention;

[0030] Figure 3 This is a schematic diagram of the end face of the float-type siphon assembly arranged in the secondary washing chamber in an embodiment of the drum washing machine proposed in this invention.

[0031] Figure 4 This is a schematic diagram of the float-type siphon assembly arranged in the secondary washing chamber on the side of the secondary washing chamber in an embodiment of the drum washing machine proposed in this invention.

[0032] In the attached diagram: 100, machine body; 110, main washing chamber; 111, drain outlet; 120, main clothes loading / unloading opening; 130, drain pipe; 140, outer drum; 150, main sealing ring; 160, main water inlet channel; 161, main water inlet; 170, secondary water inlet channel; 171, secondary water inlet pipe; 172, secondary water collection tank; 173, secondary water inlet; 200, main drum; 210, first magnetic component; 300, main sealing door; 310, main outer cover; 320, main inner cover; 330, secondary drum; 340 350. Secondary garment loading / unloading opening; 351. Secondary washing chamber; 360. Partition; 370. Secondary water inlet; 380. Secondary water outlet; 400. Secondary magnetic component; 410. Siphon assembly; 420. Siphon bend; 430. Flexible hose; 431. Float; 432. Suction channel; 433. Horizontal section; 434. Vertical section; 440. Suction head; 441. Toothed structure; 500. Secondary sealing door; 510. Secondary outer cover; 520. Secondary inner cover; 600. Drive unit; 700. Damping platform; 800. Suspension spring. Detailed Implementation

[0033] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0034] Secondly, it should be noted that in the description of this invention, terms such as "inner" and "outer" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0035] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Existing drum washing machines with a secondary drum inside the main sealing door require a separate secondary drive module, consisting of a motor and other electrical components, to drive the secondary drum. After installing the secondary drive module, wiring and circuits connected to the power supply module on the machine body need to be routed into the main sealing door to transmit electrical energy and control signals. This wiring into the main sealing door, which is located at the main clothes loading / unloading opening, is quite difficult. Furthermore, the secondary drive module within the main sealing door occupies a significant amount of space, resulting in a small secondary washing chamber, a small secondary drum, and poor washing capacity. In addition, the secondary drive module itself is expensive, and routing wiring and circuits into the main sealing door further increases manufacturing costs, making drum washing machines with a secondary drum inside the main sealing door prohibitively expensive to manufacture.

[0037] To address the aforementioned issues, the inventors of this invention have implemented a novel design. A first magnetic structure is installed at the end of the main drum near the auxiliary drum within the main washing chamber, which is located within the machine body. A second magnetic structure, corresponding to the first magnetic structure, is installed at the end of the auxiliary drum, coaxial with the main drum, within the auxiliary washing chamber formed inside the main sealing door, near the main drum. This allows a drive unit located within the machine body to rotate the main drum, and the rotating main drum, through the magnetic force between the first and second magnetic structures, drives the auxiliary drum to rotate. With this configuration, the drive unit can drive the main drum to rotate, thus synchronously rotating the auxiliary drum. Only a drive unit for the main drum needs to be located within the machine body to drive both the main and auxiliary drums for washing clothes in both washing chambers. This eliminates the need for a separate auxiliary drive module within the main sealing door, avoiding the wiring difficulties between the main sealing door and the machine body. Furthermore, eliminating the auxiliary drive module within the main sealing door allows for a larger space in the auxiliary washing chamber, increasing the size of the auxiliary drum and enhancing the washing capacity of the auxiliary washing chamber. Furthermore, reducing the need for a separate auxiliary drive module to drive the auxiliary roller lowers manufacturing costs. Additionally, the auxiliary roller is magnetically driven, meaning it can be stopped by a person or object touching it, enhancing safety.

[0038] The preferred technical solution of the drum washing machine of the present invention is described below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of an embodiment of the proposed drum washing machine. Figure 1 As shown, an embodiment of the drum washing machine of the present invention specifically includes:

[0040] The machine body 100 has a main washing chamber 110 inside and a main garment loading and unloading port 120 on the machine body 100 that connects to the main washing chamber 110.

[0041] The main washing chamber 110 is equipped with a main drum 200, and the main clothes loading and unloading port 120 is equipped with a main sealing door 300 for sealing the main washing chamber 110. The machine body 100 is also equipped with a drive device 600 for driving the main drum 200 to rotate.

[0042] The main sealing door 300 includes a main outer cover 310 and a main inner cover 320. The main inner cover 320 is fastened to the inner surface of the main outer cover 310. The main outer cover 310 and the main inner cover 320 define a secondary washing chamber 350. A secondary washing chamber 350 coaxial with the main washing chamber 200 is arranged inside the secondary washing chamber 350.

[0043] The main inner cover 320 is made of non-magnetic material. The end of the main roller 200 near the auxiliary roller 330 is provided with a first magnetic structure, and the end of the auxiliary roller 330 near the main roller 200 is provided with a second magnetic structure corresponding to the first magnetic structure. The rotating main roller 200 drives the auxiliary roller 330 to rotate through the magnetic force between the first magnetic structure and the second magnetic structure.

[0044] In the above embodiment, when the drive device 600 drives the main drum 200 to rotate, the auxiliary drum 330 rotates with the main drum 200 due to the magnetic force between the first and second magnetic structures. This eliminates the need for a separate auxiliary drive module to drive the auxiliary drum 330 within the main sealing door 300, and avoids the difficulty of wiring between the main sealing door 300 and the machine body 100. Furthermore, it allows for a larger secondary washing chamber, increasing the size of the auxiliary drum 330 and enhancing the washing capacity of the secondary washing chamber 350. Moreover, reducing the need for a separate auxiliary drive module for the auxiliary drum 330 lowers manufacturing costs. Since the auxiliary drum 330 rotates magnetically, it can be stopped by contact with a person or object, enhancing safety.

[0045] It should be noted that the magnetic force between the first magnetic structure and the second magnetic structure can be either magnetic attraction or magnetic repulsion, as long as the rotating first magnetic structure can drive the auxiliary roller 330 equipped with the second magnetic structure to rotate through the magnetic force.

[0046] It is understood that the machine body 100 is provided with an outer drum 140, the inner cavity of the outer drum 140 is the main washing chamber 110, the main sealing door 300 is provided with a secondary clothes loading and unloading port 340 that connects to the secondary washing chamber 350, and a secondary sealing door 500 for sealing the secondary washing chamber 350 is provided at the secondary clothes loading and unloading port 340. The side walls of the main drum 200 and the secondary drum 330 are provided with multiple water passage holes. The free end of the main drum 200 is opposite to the main clothes loading and unloading port 120, and the connecting end of the main drum 200 is connected to the drive device 600. The main drum 200 is rotatably connected to the cavity wall of the main washing chamber 110 through the drive device 600. The drive device 600 can be fastened to the outer drum 140. The free end of the secondary drum 330 is opposite to the secondary clothes loading and unloading port 340, and the connecting end of the secondary drum 330 is rotatably connected to the cavity wall of the secondary washing chamber 350.

[0047] The main outer cover 310 includes a main outer cover and a main door ring. The main door ring is closably installed at the main garment loading / unloading opening 120. The main outer cover is fastened to the outer surface of the main door ring. The main inner cover 320 is fastened to the inner surface of the main door ring. The main inner cover 320 extends into the main garment loading / unloading opening 120 and is sealed to the main garment loading / unloading opening 120. The main inner cover 320, the main outer cover, and the main door ring define the secondary washing chamber 350. The secondary drum 330 is rotatably connected to the inner surface of the end of the main inner cover 320 away from the main outer cover 310.

[0048] For example, the drive unit 600 is a direct drive motor. The motor stator is fixed on the outer drum 140. The motor rotor is coaxially and tightly connected to the connection end of the main drum 200. The connection end of the auxiliary drum 330 is rotatably connected to the cavity wall of the auxiliary washing chamber 350 through a bearing assembly. One side of the main door ring is hinged to the side corresponding to the main clothes loading and unloading port 120.

[0049] In some examples, the main outer cover has a secondary clothing access opening 340, and a secondary sealing door 500 is located on the main outer cover.

[0050] This design facilitates the loading and unloading of underwear in the secondary washing chamber.

[0051] In some examples, the main inner cover 320 is made of austenitic stainless steel.

[0052] With this design, the main sealing door 300 and its internal secondary washing chamber 350 are less prone to damage and have a longer service life.

[0053] In some possible implementations, the drum washing machine is a horizontal drum washing machine, in which the main washing chamber 110, the main drum 200, the auxiliary washing chamber 350 and the auxiliary drum 330 are all arranged at an angle, and the main clothes loading and unloading port 120, the main outer cover 310 and the main inner cover 320 are all arranged at an angle.

[0054] With this design, the water in the main washing chamber 110 and the auxiliary washing chamber 350 is concentrated at their sloping bottom, which saves more water. Furthermore, the sloping main clothes loading and unloading port 120 reduces the need to bend over, making it convenient to load and unload clothes and preventing them from being missed. In addition, it also facilitates the automatic sliding of clothes that are spun onto the inner surfaces of the main inner cover 320 and the auxiliary inner cover 520 during the washing process back into the main drum 200 and the auxiliary drum 330.

[0055] Understandably, the secondary clothing access port 340 and the secondary sealing door 500 are also set at an angle, making it equally convenient to take out and put in clothing through the secondary clothing access port 340.

[0056] In some examples, the main inner cover 320 is a hollow columnar structure.

[0057] This configuration increases the volume of the secondary washing chamber 350 defined by the main inner cover 320 and the outer cover, thereby improving the washing capacity of the secondary washing chamber 350.

[0058] It is understandable that the outer shape of the main inner cover 320 and the shape of its inner cavity are both columnar structures.

[0059] In some examples, the main inner cover 320 has a cylindrical shape in both its outer surface and inner cavity.

[0060] This design allows for an increase in the size of the secondary washing chamber 330 while maintaining a fixed volume within the secondary washing chamber 350 defined by the inner cavity of the main inner cover 320. This improves washing capacity and saves more water.

[0061] In some examples, the main washing chamber 110 is cylindrical, and the main washing chamber 110, the auxiliary washing chamber 350, the main drum 200 and the auxiliary drum 330 are arranged coaxially.

[0062] This design allows for an increase in the size of the main drum 200 while maintaining a fixed volume in the main washing chamber 110, which improves washing capacity and saves more water.

[0063] In some examples, the end of the main inner cover 320 away from the main outer cover extends to the free end of the main roller 200.

[0064] This design prevents clothes in the main washing chamber 110 from falling into the space between the main drum 200 and the main washing chamber 110 during washing, and also helps to increase the volume of the secondary washing chamber 350.

[0065] In some examples, the main outer cover is a heat shield.

[0066] This design prevents the main sealing door from overheating when a drying system is installed inside a drum washing machine.

[0067] In some examples, the secondary sealing door 500 includes a secondary outer cover 510 and a secondary inner cover 520, the secondary inner cover 520 being fastened to the inner surface of the secondary outer cover 510, the end of the secondary inner cover 520 away from the secondary outer cover 510 extending to the free end of the secondary roller 330, and the secondary outer cover 510 or the secondary inner cover 520 being used for a sealing engagement with the secondary garment loading / unloading opening 340.

[0068] This design prevents clothes in the secondary washing chamber 350 from falling into the space between the secondary drum 330 and the secondary washing chamber 350 during washing.

[0069] Understandably, the secondary outer cover 510 includes a secondary outer cover and a secondary door ring. The secondary door ring is closable and installed at the secondary clothing access opening 340. The secondary outer cover is securely connected to the outer surface of the secondary door ring, and the secondary inner cover 520 is securely connected to the inner surface of the secondary door ring. The secondary inner cover 520 extends into the secondary clothing access opening 340.

[0070] For example, one side of the secondary door ring is hinged to the side corresponding to the secondary clothing access opening 340.

[0071] In some examples, the secondary cover is a heat shield.

[0072] This design prevents the secondary sealing door from overheating when a drying system is installed inside a drum washing machine.

[0073] In some examples, the inner cover 520 is a basin-shaped structure that is larger on the outside and smaller on the inside.

[0074] This design allows clothes and other items on the surface of the inner cover 520 to automatically fall into the secondary washing chamber 350.

[0075] In some examples, a secondary sealing ring is provided at the secondary garment loading / unloading port 340 to connect the outer wall of the main outer cover 310 and the cavity wall of the secondary washing chamber 350.

[0076] With this configuration, the sealing effect of the secondary sealing door 500 can be guaranteed when it is closed by the sealing cooperation between the secondary sealing ring and the secondary outer cover 510 or the secondary inner cover 520.

[0077] In some possible implementations, the end of the auxiliary drum 330 near the main drum 200 is located within the main washing chamber 110.

[0078] This arrangement helps to reduce the distance between the first magnetic structure and the second magnetic structure, and also helps to enhance the magnetic force between the first magnetic structure and the second magnetic structure.

[0079] In some examples, the first magnetic structure is located radially outside the second magnetic structure on the auxiliary roller 330.

[0080] This configuration helps to reduce the distance between the first magnetic structure and the second magnetic structure, enhances the magnetic force between the first magnetic structure and the second magnetic structure, and provides a large torque for driving the auxiliary roller 330 to rotate, which is beneficial for driving the auxiliary roller 330 to rotate.

[0081] In some examples, the first magnetic structure includes one or more first magnetic elements 210, which are fastened to the end of the main roller 200 near the auxiliary roller 330, and the second magnetic structure includes one or more second magnetic elements 380, which are fastened to the end of the auxiliary roller 330 near the main roller 200.

[0082] For example, the edge of the free end of the main roller 200 protrudes towards the main garment loading / unloading opening 120 with a mounting portion. The mounting portion has mounting grooves corresponding to the first magnetic components 210. The first magnetic components 210 are embedded in the corresponding mounting grooves. A limiting bracket is also provided at the opening of the mounting groove to prevent the first magnetic components 210 from detaching under centrifugal force. A second magnetic component 380 is fastened to the side wall of the auxiliary roller 330 at a position corresponding to the first magnetic component 210 on the end facing the main roller 200. The second magnetic component 380 can be fastened to the side wall of the auxiliary roller 330 by welding, bonding, or other methods.

[0083] In some other examples, the second magnetic structure may be located at the edge of the end of the auxiliary roller 330, with the first and second magnetic structures arranged axially opposite to each other on the auxiliary roller.

[0084] In the example where the auxiliary roller 330 is rotated by magnetic attraction, the auxiliary roller 330 can also be made entirely of magnetic material. The end of the auxiliary roller 330 near the main roller 200 serves as the second magnetic structure, and the first magnetic structure at the end of the main roller 200 directly attracts the corresponding area on the auxiliary roller 330.

[0085] It is understandable that, in the example where the auxiliary roller 330 is rotated by magnetic attraction, both the first magnetic structure and the second magnetic structure can be magnets, and the first magnetic structure and the second magnetic structure have opposite poles; or, one of the first magnetic structure and the other magnetic structure can be a magnet, and the other can be made of a superconducting magnetic material, such as permalloy.

[0086] In the example where the auxiliary roller 330 is rotated by magnetic repulsion, both the first magnetic structure and the second magnetic structure are magnets, and the magnetic poles of the first magnetic structure and the second magnetic structure are the same in the circumferentially opposite parts of the auxiliary roller 330.

[0087] Figure 2 This is a schematic diagram of the second magnetic structure arranged on the auxiliary drum in an embodiment of the proposed drum washing machine.

[0088] like Figure 2 As shown, in some possible implementations, the first magnetic structure includes a plurality of first magnetic elements 210 arranged circumferentially along the main roller 200, and the second magnetic structure includes a plurality of second magnetic elements 380 corresponding one-to-one with the first magnetic elements 210.

[0089] Each first magnetic element 210 and its corresponding second magnetic element 380 are arranged facing each other in the circumference of the auxiliary roller 330. The rotating main roller 200 drives the auxiliary roller 330 to rotate through the magnetic attraction between the first magnetic element 210 and the second magnetic element 380; or, all the first magnetic elements 210 and the second magnetic elements 380 are arranged alternately in the circumference of the auxiliary roller 330. The rotating main roller 200 drives the auxiliary roller 330 to rotate through the magnetic repulsion between the first magnetic element 210 and the second magnetic element 380.

[0090] With this configuration, the magnetic force generated between the first magnetic structure and the second magnetic structure is large and uniform, which is beneficial for the auxiliary roller 330 to rotate under the magnetic force of the first magnetic structure and the second magnetic structure.

[0091] In some examples, each pair of first magnetic elements 210 and second magnetic elements 330 are corresponding fan-shaped structures.

[0092] This configuration results in a large torque for driving the auxiliary roller 330 to rotate, which is beneficial for driving the auxiliary roller 330 to rotate.

[0093] like Figure 1 As shown, in some possible embodiments, the top of the main inner cover 320 is provided with a secondary water inlet 360 that communicates with the secondary washing chamber 350, and the top surface of the main clothes loading and unloading opening 120 is provided with a secondary water inlet 173 that is opposite to the secondary water inlet 360. The secondary water inlet 360 and the secondary water inlet 173 are spaced apart, and the opening of the secondary water inlet 360 is greater than the opening of the secondary water inlet 173.

[0094] It is understandable that when the main sealing door 300 is closed, the auxiliary water inlet 360 is opposite to the auxiliary water injection port 173.

[0095] This design facilitates the filling of water into the secondary washing chamber 350. During water filling, the air inside the secondary washing chamber 350 is displaced through the secondary water inlet 360. The alternating design of the secondary water inlet 360 and the secondary water inlet 173 makes it easy to open and close the main sealing door 300.

[0096] In some examples, the secondary water inlet 173 is connected to the water inlet pipe through the secondary water inlet channel 170, and the secondary water inlet channel 170 is equipped with a secondary water inlet valve.

[0097] This configuration allows for control of the water volume in the secondary washing chamber 350. When there are no clothes to be washed in the secondary washing chamber 350, there is no need to add water to the secondary washing chamber 350, which reduces the load on the drive unit 600.

[0098] In some examples, the body 100 is equipped with a detergent dispenser, the bottom of which is provided with a first detergent outlet. The secondary water inlet channel 170 includes a secondary water inlet pipe 171 and a secondary water collection tank 172. The inlet end of the secondary water inlet pipe 171 is connected to the inlet pipe, and the outlet end of the secondary water inlet pipe 171 and the first detergent outlet are both connected to the inner cavity of the secondary water collection tank 172. The lower end of the secondary water collection tank 172 is connected to the secondary water inlet 173 through a pipe.

[0099] With this setup, the pre-measured detergent flows into the secondary water collection tank 172 through the first detergent outlet. The secondary water collection tank 172 is then flushed by the secondary water inlet pipe 171. The water mixed with detergent in the secondary water collection tank 172 is injected into the secondary washing chamber 350 through the secondary water inlet 173, which facilitates the addition of detergent into the secondary washing chamber 350. When rinsing is required, the first detergent outlet is closed, and after the secondary water collection chamber is flushed by the secondary water inlet pipe 171, there is no detergent residue, which is beneficial for rinsing the underwear in the secondary washing chamber 350.

[0100] Understandably, the main washing chamber 110 has a main water inlet 161 at its top, which is connected to the water inlet pipe via a main water inlet channel 160. A main water inlet valve is installed on the main water inlet channel 160. A second detergent outlet is located at the bottom of the detergent dispenser, and this outlet is connected to the main water inlet channel 160. The detergent flowing from the second outlet is flushed into the main washing chamber 110 through the main water inlet channel 160. A drain outlet 111 is located at the bottom of the main washing chamber 110, and it is connected to a drain pipe 130. To achieve top drainage, a drain pump can be installed on the drain pipe 130.

[0101] In some possible implementations, a secondary water outlet 370 is provided on the bottom wall of the secondary washing chamber 350, and a siphon assembly 400 is provided inside the secondary washing chamber 350. The siphon assembly 400 is located outside the secondary drum 330. The water outlet end of the siphon assembly 400 is connected to the secondary water outlet 370, and the secondary water outlet 370 is connected to the drain pipe 130 inside the machine body 100. The water inlet end of the siphon assembly 400 is connected to the secondary washing chamber 350. The siphon assembly 400 is configured to discharge the washing water in the secondary washing chamber 350 into the drain pipe 130 after the liquid level in the secondary washing chamber 350 reaches a preset position.

[0102] With this setup, during washing, the water level in the secondary washing chamber 350 is lower than the preset position. When drainage is required, water is added to the secondary washing chamber 350 to raise the water level to the preset position, which triggers the siphon to drain the water. This makes water storage and drainage convenient.

[0103] For example, the water level in the secondary washing chamber 350 can be controlled by adjusting the water injection time based on the flow rate of the secondary water inlet 173. During washing, the water level in the secondary washing chamber 350 is kept slightly lower than the preset position. When drainage is required, only a small amount of water needs to be briefly injected into the secondary water inlet 173 to trigger the siphon and drain the water.

[0104] In some possible implementations, a main sealing ring 150 is provided at the main garment loading and unloading port 120, which connects the outer wall of the machine body 100 and the cavity wall of the main washing chamber 110.

[0105] This design prevents water and clothes from entering the space between the main washing chamber 110 and the outer wall of the machine body 100.

[0106] In some possible implementations, the secondary water inlet 173 is located on the main sealing ring 150.

[0107] This arrangement makes it easy for the secondary water inlet 173 to be opposite the secondary water inlet 360, which facilitates the injection of water into the secondary washing chamber 350 through the secondary water inlet 360.

[0108] In some possible implementations, the secondary water outlet 370 is located opposite to the main sealing ring 150, and the secondary water outlet 370 is spaced apart from the main sealing ring 150. The secondary water outlet 370 is connected to the drain pipe 130 through the main washing chamber 110.

[0109] With this configuration, the water flowing out of the auxiliary outlet 370 flows into the main washing chamber 110 along with the main sealing ring 150, which can prevent the water flowing out of the auxiliary outlet 370 from entering the main drum 200.

[0110] In an embodiment of a horizontal drum washing machine, the secondary water outlet 370 is located on the upper part of the bottom wall of the secondary washing chamber 350, and the water inlet end of the siphon assembly 400 faces the lower part of the bottom wall of the secondary washing chamber 350.

[0111] This design facilitates the complete drainage of water from the secondary washing chamber 350 and allows the secondary water outlet 370 to be aligned with the main sealing ring 150.

[0112] Figure 3 This is a schematic diagram of the float-type siphon assembly arranged in the secondary washing chamber at the end face of the secondary washing chamber in an embodiment of the proposed drum washing machine. Figure 4 This is a schematic diagram of the float-type siphon assembly arranged in the secondary washing chamber on the side of the secondary washing chamber in an embodiment of the proposed drum washing machine.

[0113] like Figure 3 , Figure 4 As shown, in some possible implementations, the siphon assembly 400 is a float-type siphon assembly, the inlet end of which is configured to float up and down with changes in the liquid level within the secondary washing chamber 350.

[0114] With this configuration, the water inlet of the siphon assembly 400 will float according to the change of liquid level in the secondary washing chamber 350, which can prevent the water inlet of the siphon assembly 400 from being blocked by lint in the secondary washing chamber 350 when draining.

[0115] In some possible implementations, the float-type siphon assembly includes a siphon bend 410, a float 430, a hose 420, and a suction head 440.

[0116] The siphon bend 410 is a rigid tube, which is fastened to the inner wall of the auxiliary washing chamber 350. The top of the inner cavity of the siphon bend 410 is at a preset position.

[0117] The outlet end of the siphon bend 410 is connected to the secondary outlet 370, and the inlet end of the siphon bend 410 is connected to the outlet end of the hose 420. The float 430 is provided with a water suction channel 431. The inlet end of the hose 420 is tightly connected to the float 430, and the inlet end of the hose 420 is connected to the outlet end of the water suction channel 431. The suction head 440 is tightly connected to the lower surface of the float 430, and the outlet end of the suction head 440 is connected to the inlet end of the water suction channel 431. The inlet end of the suction head 440 faces downward and is connected to the secondary washing chamber 350.

[0118] With this configuration, the float 430 floats on the liquid surface, and the inlet end of the suction head 440 is always slightly below the liquid surface, which ensures continuous drainage and facilitates the complete drainage of water in the auxiliary washing chamber 350. The suction head 440 and the siphon bend 410 are connected by a flexible hose 420, which allows the float 430 to drive the suction head 440 to float. The outlet end of the rigid siphon bend 410 is connected to the auxiliary outlet 370, which is less prone to failure and ensures high reliability of drainage.

[0119] In some possible implementations, the curvature of the siphon bend 410 corresponds to that of the inner wall of the secondary washing chamber 350.

[0120] This arrangement facilitates the layout of the siphon bend 410 and reduces the gap between the outer wall of the auxiliary drum 330 and the inner wall of the auxiliary washing chamber 350.

[0121] It is understandable that the curvature of the inner wall of the siphon bend 410 corresponds to that of the secondary washing chamber 350. That is, when the radial section of the secondary washing chamber 350 is circular, the projection of the siphon bend 410 on the end face of the secondary washing chamber 350 is an arc segment.

[0122] In some examples, the radial cross-section of the siphon bend 410 is a flattened circle.

[0123] This arrangement facilitates the layout of the siphon bend 410 and reduces the gap between the outer wall of the auxiliary drum 330 and the inner wall of the auxiliary washing chamber 350.

[0124] In some possible implementations, the water inlet end of the suction head 440 is a toothed structure 441.

[0125] This design prevents the suction head 440 from reaching the bottom wall of the secondary washing chamber 350 when drainage is almost finished, thus avoiding drainage interruption and excessive residual water in the secondary washing chamber 350. It also prevents the float 430 from lifting the suction head 440 from the bottom wall of the secondary washing chamber 350 after water is refilled, directly triggering a siphon and causing a failure to continue storing water.

[0126] In other examples, the float-type siphon assembly may also omit the rigid siphon bend 410, allowing the middle of the hose 420 to be fixed to the inner wall of the secondary washing chamber 350 and in a preset position, with the water outlet of the hose 420 directly connected to the secondary water outlet 370.

[0127] In some possible implementations, a partition 351 is provided between the inner wall of the secondary washing chamber 350 and the outer wall of the secondary drum 330, with a gap between the bottom side of the partition 351 and the bottom wall of the secondary washing chamber 350. A float-type siphon assembly is disposed in the space between the partition 351 and the secondary washing chamber 350, and the water inlet end of the float-type siphon assembly is configured to float up and down in the space between the partition 351 and the secondary washing chamber 350.

[0128] This configuration ensures that the float-type siphon assembly floats within the space between the partition 351 and the secondary washing chamber 350, preventing the float-type siphon assembly from affecting the secondary drum 330.

[0129] In an embodiment of a float-type siphon assembly including a float 430, a hose 420, a suction head 440, and a siphon bend 410, the gap between the bottom side of the partition 351 and the bottom wall of the secondary washing chamber 350 is less than the sum of the heights of the suction head 440 and the float 430. The siphon bend 410, hose 420, float 430, and suction head 440 are all located in the space between the partition 351 and the secondary washing chamber 350. The float 430 drives the suction head 440 to float in the space between the partition 351 and the secondary washing chamber 350.

[0130] In some examples, the water intake channel 431 includes a horizontal section 432 and a vertical section 433. The water outlet of the horizontal section 432 passes through the side wall of the float 430 and is connected to the water inlet of the hose 420. The water inlet of the horizontal section 432 is connected to the water outlet of the vertical section 433. The water inlet of the vertical section 433 is connected to the water outlet of the suction head 440. The upper end of the vertical section 433 is its water outlet, and the lower end is its water inlet.

[0131] This configuration helps to keep the water inlet end of the suction head 440 vertically downward. Especially in embodiments with a partition 351, it helps to keep the water inlet end of the suction head 400 facing downward when the float 430 drives the suction head 400 to float in the narrow space between the partition 351 and the secondary washing chamber 350.

[0132] In some other examples, the water intake channel 431 may also be provided on the upper surface of the float 430, and the water inlet end of the hose 420 may be securely connected to the upper surface of the float 430.

[0133] In some examples, the body 100 is provided with a suspension spring 800 and a damping platform 700. The upper end of the suspension spring 800 is fastened to the top of the inner side of the body 100, and the lower end of the suspension spring 800 is fastened to the outer cylinder 140. The outer cylinder 140 is suspended in the body 100 by the suspension spring 800. The upper end of the damping platform 700 is fastened to the bottom of the outer cylinder 140, and the lower end of the damping platform 700 is fastened to the body 100.

[0134] With this configuration, the damping platform 700 can accelerate the attenuation of vibrations in the outer drum 140 and the main drum 200, allowing the vibrating outer drum 140 and main drum 200 to stop vibrating quickly, thus reducing noise. In addition, the suspension spring 800 and the damping platform 700 work together to help keep the main washing chamber 110 in an inclined position.

[0135] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A drum washing machine, characterized in that, include: The machine body has a main washing chamber inside and a main clothes loading and unloading port that communicates with the main washing chamber. The main washing chamber is equipped with a main drum, and the main clothes loading and unloading port is equipped with a main sealing door for sealing the main washing chamber. The machine body is also equipped with a drive device for driving the main drum to rotate. The main sealing door includes a main outer cover and a main inner cover. The main outer cover is connected to the machine body, and the main inner cover is fastened to the inner surface of the main outer cover. The main outer cover and the main inner cover define a secondary washing chamber, and a secondary washing chamber is arranged in the secondary washing chamber, which is coaxial with the main washing drum. The main inner cover is made of a non-magnetic material. The end of the main roller near the auxiliary roller is provided with a first magnetic structure, and the end of the auxiliary roller near the main roller is provided with a second magnetic structure corresponding to the first magnetic structure. The rotating main roller drives the auxiliary roller to rotate through the magnetic force between the first magnetic structure and the second magnetic structure. The end of the auxiliary drum near the main drum is located inside the main washing chamber, and the first magnetic structure is located on the radial side of the second magnetic structure of the auxiliary drum; The first magnetic structure includes a plurality of first magnetic elements spaced apart along the circumference of the main roller, and the second magnetic structure includes a plurality of second magnetic elements corresponding one-to-one with the first magnetic elements. Each pair of first magnetic elements and second magnetic elements is a corresponding fan-shaped structure. Each of the first magnetic elements and its corresponding second magnetic element is arranged facing each other on the circumference of the auxiliary roller. The rotating main roller drives the auxiliary roller to rotate through the magnetic attraction between the first magnetic element and the second magnetic element; or, all the first magnetic elements and the second magnetic elements are arranged alternately on the circumference of the auxiliary roller. The rotating main roller drives the auxiliary roller to rotate through the magnetic repulsion between the first magnetic element and the second magnetic element.

2. The drum washing machine according to claim 1, characterized in that, The top of the main inner cover is provided with a secondary water inlet that connects to the secondary washing chamber. The top surface of the main clothes loading and unloading opening is provided with a secondary water inlet that is opposite to the secondary water inlet. The secondary water inlet and the secondary water inlet are spaced apart, and the opening of the secondary water inlet is greater than the opening of the secondary water inlet. And / or, The auxiliary washing chamber has an auxiliary water outlet on its bottom wall and a siphon assembly inside the auxiliary washing chamber. The siphon assembly is located outside the auxiliary drum, and its outlet end is connected to the auxiliary water outlet. The auxiliary water outlet is connected to the drain pipe inside the machine body, and its inlet end is connected to the auxiliary washing chamber. The siphon assembly is configured to discharge the washing water in the auxiliary washing chamber into the drain pipe after the liquid level in the auxiliary washing chamber reaches a preset position.

3. The drum washing machine according to claim 2, characterized in that, The main garment loading and unloading port is provided with a main sealing ring that connects the outer wall of the machine body and the cavity wall of the main washing chamber; The auxiliary water inlet is located on the main sealing ring; and / or, the auxiliary water outlet is located opposite to the main sealing ring, the auxiliary water outlet is spaced apart from the main sealing ring, and the auxiliary water outlet is connected to the drain pipe through the main washing chamber.

4. The drum washing machine according to claim 2, characterized in that, The siphon assembly is a float-type siphon assembly, and the water inlet end of the float-type siphon assembly is configured to float up and down with the change of liquid level in the auxiliary washing chamber.

5. The drum washing machine according to claim 4, characterized in that, The float-type siphon assembly includes a siphon bend, a float, a hose, and a suction head; The siphon bend is a rigid tube that corresponds to the curvature of the inner wall of the auxiliary washing chamber. The siphon bend is fastened to the inner wall of the auxiliary washing chamber, and the top of the inner cavity of the siphon bend is the preset position. The outlet end of the siphon bend is connected to the secondary outlet, the inlet end of the siphon bend is connected to the outlet end of the hose, the float is provided with a water suction channel, the inlet end of the hose is fixedly connected to the float, and the inlet end of the hose is connected to the outlet end of the water suction channel, the suction head is fixedly connected to the lower surface of the float, the outlet end of the suction head is connected to the inlet end of the water suction channel, the inlet end of the suction head faces downward, and the inlet end of the suction head is connected to the secondary washing chamber.

6. The drum washing machine according to claim 5, characterized in that, The water inlet end of the suction head has a toothed structure; And / or, the water suction channel includes a horizontal section and a vertical section, the water outlet of the horizontal section penetrates the side wall of the float and is connected to the water inlet of the hose, the water inlet of the horizontal section is connected to the water outlet of the vertical section, the water inlet of the vertical section is connected to the water outlet of the suction head, and the upper end of the vertical section is its water outlet and the lower end is its water inlet.

7. The drum washing machine according to claim 4, characterized in that, A partition is provided between the inner wall of the secondary washing chamber and the outer wall of the secondary drum, and a gap is left between the bottom side of the partition and the bottom wall of the secondary washing chamber. The float-type siphon assembly is disposed in the space between the partition and the secondary washing chamber, and the water inlet end of the float-type siphon assembly is configured to float up and down in the space between the partition and the secondary washing chamber.

8. The drum washing machine according to any one of claims 1-7, characterized in that, The main washing chamber, the main drum, the auxiliary washing chamber, and the auxiliary drum are all arranged at an angle, and the main garment loading and unloading port, the main outer cover, and the main inner cover are all arranged at an angle.

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