A drum washing machine

Abstract

The present invention belongs to the technical field of washing machines and discloses a drum washing machine comprising: an inner drum, which independently holds water during the washing / rinsing process and is provided with a drain outlet; a water collection device, which has a water collection chamber connected to the drain outlet; and a fan blade structure at least partially disposed within the water collection chamber, wherein the rotation of the fan blade structure creates a negative pressure within the water collection chamber. The drum washing machine of the present invention has a fan blade structure disposed within the water collection chamber. When the inner drum drains water into the water collection device, the rotation of the fan blade structure creates a negative pressure within the water collection chamber, thereby causing air outside the water collection device to flow into the water collection chamber through the gap between the water collection device and the inner drum. This effectively prevents water from the inner drum from splashing out of the gap between the water collection device and the inner drum, and avoids water leakage between the water collection device and the inner drum during the drainage process.

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] Existing drum washing machines typically consist of an inner drum and an outer drum, with multiple dewatering holes located on the inner drum's wall. However, during the wash process, the wash water between the inner and outer drums remains unused, resulting in wasted water. Furthermore, some dirt generated during the wash process can remain between the inner and outer drums, making it difficult to clean. Long-term accumulation can contaminate the wash water, impacting the washing effect.

[0003] To solve the above problems, the prior art proposes a washing machine in which no dehydration holes are provided on the inner drum, so that the inner drum can independently hold washing water during the washing process, thereby avoiding the accumulation of water between the inner and outer drums during the washing process, saving the amount of washing water, and also largely avoiding the accumulation of dirt between the inner and outer drums.

[0004] For example, Chinese patent application number 201910189910.1 discloses a sealed drainage device for a drum washing machine. The drum washing machine includes an inner drum for independently holding wash water when washing clothes, with a drain opening provided in the inner drum; a sealing component for sealing the drain opening of the inner drum; and a sealing member provided on the sealing member, which seals against the wall of the inner drum to close the drain opening or disengages to open the drain opening. A drum washing machine is also disclosed, wherein the inner drum of the washing machine is a container for holding water during a washing cycle, and the inner drum is provided with at least one drain opening. Each drain opening is provided with one of the sealed drainage devices described above. The sealing member of the sealed drainage device moves toward the center of the inner drum under the centrifugal force of the inner drum's rotation, thereby driving the seal to disengage from the inner drum wall and open the drain opening.

[0005] However, in the above scheme, the drain outlet is set on the side wall of the inner tube. In order to collect and discharge the drainage of the inner tube, it is necessary to retain the structure of the outer tube, or at least set a water collection device under the inner tube with a length that can cover the entire range from the inner tube mouth to the bottom of the tube. It is impossible to effectively expand the capacity of the inner tube.

[0006] The prior art also proposes a solution of setting a water retaining ring at the open part of the water collecting device to shorten the length of the water collecting device. However, since the inner cylinder relies on centrifugal force to drain water outward, the discharged water flow rate is relatively high, and it is inevitable that water will splash and then splash out from the gap between the water collecting device and the inner cylinder, causing water leakage.

[0007] In view of this, the present invention is proposed. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a drum washing machine with a fan blade structure arranged in a water collecting chamber. When the inner drum drains water to the water collecting device, a negative pressure is formed in the water collecting chamber through the rotation of the fan blade structure, so that the external air enters the water collecting chamber through the gap between the water collecting device and the inner drum under the action of the negative pressure environment in the water collecting chamber, effectively preventing the water discharged from the inner drum from splashing from the gap to the outside of the water collecting device.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0010] A drum washing machine, comprising:

[0011] The inner drum holds water independently during the washing / rinsing process and has a drain outlet;

[0012] a water collecting device having a water collecting chamber communicated with the drain outlet;

[0013] It also includes a fan blade structure that is at least partially arranged in the water collecting chamber, and the fan blade structure rotates to form a negative pressure in the water collecting chamber.

[0014] Furthermore, the fan blade structure is connected to the inner cylinder and rotates synchronously with the inner cylinder.

[0015] Furthermore, the water collection device is arranged on the side of the inner cylinder where the bottom is located, and the fan blade structure extends from the inner cylinder to the water collection device, with the extension end located outside the bottom of the inner cylinder and inside the water collection cavity;

[0016] Preferably, the fan blade structure is connected to the outer periphery of the inner cylinder near one end of the cylinder bottom.

[0017] Furthermore, the fan blade structure has a hollow channel connecting the water collection cavity and the drainage port of the inner cylinder, so that the fan blade structure forms a drainage channel for draining water from the inner cylinder to the water collection device;

[0018] Preferably, the water inlet end of the drainage channel is connected to the drainage port of the inner tube, and the water outlet end is arranged inside the water collecting chamber.

[0019] Furthermore, the water inlet end of the drainage channel is in the shape of a strip extending a certain length along the circumference of the inner cylinder, and the water outlet end of the drainage channel is in the shape of a strip matching the shape of the water inlet end, and there is a certain twist angle between the extension direction of the strip water outlet end and the extension direction of the strip water inlet end;

[0020] Preferably, the torsion angle is 30° to 60°.

[0021] Furthermore, the drainage channel includes an extension portion and a blade portion in sequence from the water inlet end to the water outlet end; the extension portion extends a certain length from the drainage outlet of the inner cylinder in a direction parallel to the axis of the inner cylinder, and the blade portion gradually twists and extends from the extended end of the extension portion, so that a certain twist angle exists between the water outlet end and the water inlet end;

[0022] Preferably, the connection between the extension portion and the blade portion is flush with the rearmost end of the inner tube.

[0023] Furthermore, the wall of the inner cylinder includes a body section and a mounting section connected to the bottom of the cylinder. The diameter of the mounting section is smaller than the diameter of one end of the body section close to the bottom of the cylinder. The mounting section and the body section are connected by a connecting wall.

[0024] The drain port is provided on the connecting wall, the drain channel extends from the connecting wall to the outside of the cylinder bottom, and the extension portion is provided on the outer periphery of the mounting section;

[0025] Preferably, the surface of the extension portion facing the mounting section is arranged in contact with the outer peripheral surface of the mounting section; and / or the surface of the extension portion facing away from the mounting section is flush with the outer peripheral surface of the main body section near the bottom end of the cylinder;

[0026] Preferably, the connecting wall has a tapered structure with a gradually decreasing diameter extending from the main body section to the mounting section.

[0027] Furthermore, the inner cylinder is connected to at least two drainage channels, and the outlet ends of the drainage channels are located on the same plane perpendicular to the axis of the inner cylinder;

[0028] Preferably, the at least two drainage channels are evenly distributed along the circumference of the inner cylinder.

[0029] Furthermore, the water collecting device includes a bottom wall and a side wall surrounding the bottom wall, and the side wall is provided with a water outlet facing the tangent direction of the outer peripheral surface of the side wall;

[0030] Preferably, the water outlet direction of the water outlet is inclined downward;

[0031] Preferably, a water retaining ring extending toward the inner periphery of the side wall is provided at one end of the side wall away from the bottom wall, and the portion of the inner cylinder close to the bottom of the cylinder is provided in the water collecting cavity, with a certain gap between the inner periphery of the water retaining ring and the outer periphery of the inner cylinder.

[0032] Furthermore, the water collecting chamber has a logarithmic spiral projection on a plane perpendicular to the axis of the inner cylinder.

[0033] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0034] The drum washing machine of the present invention is provided with a fan blade structure in the water collecting chamber. During the process of the inner drum draining water to the water collecting device, a negative pressure environment can be formed in the water collecting chamber by the rotation of the fan blade structure. In the gap between the water collecting device and the inner drum, the air outside the water collecting device will flow into the water collecting chamber under the action of negative pressure, thereby effectively preventing the splashing water generated by the drainage of the inner drum from splashing out from the gap between the water collecting device and the inner drum, thereby solving the problem of water leakage between the water collecting device and the inner drum in drum washing machines that are not provided with an outer drum.

[0035] In the drum washing machine of the present invention, the inner drum itself drains water through the centrifugal force generated by high-speed rotation. The fan blade structure is connected to the inner drum, so that when the inner drum drains water, the fan blade structure can be driven to rotate synchronously, thereby generating negative pressure in the water collecting chamber. There is no need to set up a separate driving device for the fan blade structure, nor is there a need for separate control, which makes the structure of the drum washing machine simpler and the control logic simpler.

[0036] In the drum washing machine of the present invention, a hollow channel is provided within the fan blade structure to form a drainage channel for draining water to the water collection device. The fan blade structure not only directs the drain water directly into the water collection chamber, reducing water splashing, but also prevents the drain water from splashing by creating a negative pressure within the water collection chamber. This multi-functional structure further simplifies the internal structure of the drum washing machine while also providing enhanced splash prevention.

[0037] In the drum washing machine of the present invention, the water outlet of the water collection device is disposed on the side wall thereof and is oriented tangentially to the outer peripheral surface of the side wall. This facilitates the smooth outflow of water and air from the water collection chamber through the outlet under the action of the fan blade structure, thereby promoting the formation of a negative pressure environment within the water collection chamber and effectively preventing water from splashing. The cross-section of the water collection chamber is configured as a logarithmic spiral, which effectively guides the discharge of fluid through the outlet, thereby increasing the degree of negative pressure formed within the water collection chamber and further improving the effectiveness of preventing water from splashing.

[0038] 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

[0039] 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:

[0040] Figure 1 1 is a schematic structural diagram of a drum washing machine in accordance with a first embodiment of the present invention;

[0041] Figure 2 is an exploded view of the drum washing machine in the first embodiment of the present invention;

[0042] Figure 3 is a side view of the inner cylinder in embodiment 1 of the present invention;

[0043] Figure 4 This is a rear view of the inner cylinder in the first embodiment of the present invention;

[0044] Figure 5 is a front view of the water collection device in embodiment 1 of the present invention;

[0045] Figure 6 It is a schematic outline diagram of the water collection device in Example 1 of the present invention.

[0046] In the figure: 100, inner cylinder; 110, cylinder wall; 111, main body section; 112, installation section; 113, connecting wall; 120, cylinder bottom; 200, water collecting device; 201, water outlet; 210, bottom wall; 220, side wall; 230, water retaining ring; 240, boss; 300, fan blade structure; 400, drainage channel; 410, extension part; 420, fan blade part.

[0047] 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

[0048] 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.

[0049] In the description of the present invention, it should be noted that the terms "front", "rear", "horizontal", "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.

[0050] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0051] Example 1

[0052] like Figures 1 to 6 As shown, the drum washing machine described in this embodiment includes:

[0053] The inner drum 100 is used to independently hold water during the washing / rinsing process, and a drain outlet is provided on the inner drum 100;

[0054] a water collection device 200 having a water collection chamber in communication with the drain outlet;

[0055] It also includes a fan blade structure 300 that is at least partially disposed in the water collecting chamber. The fan blade structure 300 rotates to form a negative pressure in the water collecting chamber.

[0056] In this embodiment, the drain port on the inner drum 100 is sealed by a sealing assembly during the washing and rinsing cycles, forming a closed water chamber within the inner drum 100 that can independently hold water. During drainage, the sealing assembly opens the connection between the drain port and the water collection chamber, allowing the water in the inner drum 100 to drain into the water collection chamber of the water collection device 200. The water collection device 200 is provided with a water outlet 201 that communicates with the drum washing machine's drainage structure, allowing the water in the water collection device 200 to be discharged from the drum washing machine.

[0057] The inner cylinder 100 is partially disposed within the water collection device 200. The water collection device 200 has an opening for the inner cylinder 100 to be installed, with a certain gap between the opening of the water collection device 200 and the inner cylinder 100. The rotation of the fan blade structure 300, which is at least partially disposed within the water collection chamber, creates a negative pressure within the water collection chamber. Under the influence of the negative pressure, air outside the water collection device 200 flows into the water collection chamber through the gap, thereby preventing water in the water collection chamber from splashing out of the water collection device 200 through the gap and avoiding water leakage between the water collection device 200 and the inner cylinder 100.

[0058] In a further solution of this embodiment, the fan blade structure 300 is connected to the inner cylinder 100 and rotates synchronously with the inner cylinder 100.

[0059] In this embodiment, the sealing assembly used to block the drain opening can be opened to drain water under the action of a certain amount of centrifugal force. During the drainage process, the inner drum 100 needs to rotate at a high speed to provide sufficient centrifugal force to open the sealing assembly. In the above solution, the fan blade structure 300 is connected to the inner drum 100. When the inner drum 100 drains water, it can drive the fan blade structure 300 to rotate synchronously, creating a negative pressure in the water collection chamber to prevent water from splashing out. This eliminates the need to provide a separate drive device for the fan blade structure 300 and reduces the need for structural modifications to the drum washing machine. Furthermore, there is no need to separately control the rotation and stopping of the fan blade structure 300, eliminating the need to adjust the control logic of the drum washing machine, making it easy to implement.

[0060] In the specific scheme of this embodiment, the water collecting device 200 is arranged on the side of the bottom 120 of the inner tube 100, and the fan blade structure 300 extends from the inner tube 100 to the water collecting device 200. The extension end is located outside the bottom 120 of the inner tube 100 and inside the water collecting chamber.

[0061] Preferably, the fan blade structure 300 is connected to the outer periphery of the inner cylinder 100 near one end of the cylinder bottom 120 .

[0062] In detail, the front side of the water collecting device 200 is open, the end of the inner cylinder 100 close to the cylinder bottom 120 is installed inside the water collecting device 200, the fan blade structure 300 is installed at the end of the inner cylinder 100 close to the cylinder bottom 120, and extends toward the rear side of the cylinder bottom 120, and the whole is located inside the water collecting chamber.

[0063] The water collecting device 200 includes a bottom wall 210 and a side wall 220 that form a water collecting chamber. A circular boss 240 that protrudes toward the bottom 120 of the inner tube 100 is provided in the middle area of the bottom wall 210. The extended end of the fan blade structure 300 is located in the annular space between the inner periphery of the side wall 220 and the outer periphery of the boss 240.

[0064] In the above scheme, the inner cylinder 100 rotates clockwise at a high speed during the drainage process, driving the fan blade structure 300 to rotate clockwise at a high speed in the annular space, and then driving the water and air in the water collection device 200 to flow clockwise at a high speed in the annular space and be discharged from the water outlet 201, thereby forming a better negative pressure effect, thereby improving the effect of preventing water leakage between the water collection device 200 and the inner cylinder 100.

[0065] In a further solution of this embodiment, the fan blade structure 300 has a hollow channel connecting the water collection chamber and the drainage port of the inner cylinder 100, so that the fan blade structure 300 forms a drainage channel 400 for discharging water from the inner cylinder 100 to the water collection device 200.

[0066] Preferably, the water inlet end of the drainage channel 400 is connected to the drainage port of the inner cylinder 100, and the water outlet end is arranged inside the water collecting chamber.

[0067] In this embodiment, a sealing assembly (not shown) that blocks the drain outlet is installed at the outlet of the drain channel 400. During the washing and rinsing processes, the sealing assembly blocks the outlet of the drain channel 400, thereby allowing the inner drum 100 to independently hold water. During the draining process, the sealing assembly rotates relative to the outlet of the drain channel 400 under the action of centrifugal force, thereby opening the outlet and allowing water in the inner drum 100 to enter the drain channel 400 through the drain outlet and then drain into the water collection device 200 from the outlet of the drain channel 400.

[0068] In the above solution, a hollow channel is provided within the fan blade structure 300 to form a drainage channel 400 that drains water to the water collection device 200. This allows the fan blade structure 300 to rotate synchronously with the inner drum 100, creating a negative pressure within the water collection chamber, thereby preventing water from splashing out. Furthermore, it can also guide the water from the inner drum 100 into the water collection chamber for discharge, thereby reducing the degree of water splashing. The combination of these two effects further enhances the effectiveness of preventing water from splashing out. Furthermore, the addition of a single structure to the inner drum 100 achieves both of these effects, avoiding overly complex internal structures of the drum washing machine. This minimizes the internal structure of the drum washing machine, reduces the space occupied by the additional structure on the outer periphery of the inner drum 100, and does not significantly affect the expansion of the inner drum 100.

[0069] Furthermore, the water inlet end of the drainage channel 400 is a strip extending a certain length along the circumference of the inner cylinder 100, and the water outlet end of the drainage channel 400 is a strip matching the shape of the water inlet end, and there is a certain torsion angle α between the extension direction of the strip water outlet end and the extension direction of the strip water inlet end.

[0070] Preferably, the torsion angle α is 30° to 60°, and the torsion angle α used in this embodiment is 45°.

[0071] In the above scheme, the drainage channel 400 is approximately flat, and the torsion angle α between the water inlet end and the water outlet end forms a twisted curved surface on the surface of the drainage channel 400, thereby having a shape similar to a fan blade. When the inner cylinder 100 rotates clockwise, it can effectively drive the air flow and water flow to be discharged, thereby forming a negative pressure in the water collection chamber.

[0072] In the specific embodiment of this embodiment, the drainage channel 400 includes an extension portion 410 and a blade portion 420, sequentially extending from the water inlet to the water outlet. The extension portion 410 extends a certain distance from the drainage outlet of the inner cylinder 100 in a direction parallel to the axis of the inner cylinder 100. The blade portion 420 gradually twists and extends from the extended end of the extension portion 410, so that a certain twist angle α is formed between the water outlet and the water inlet.

[0073] Preferably, the connection between the extension portion 410 and the fan blade portion 420 is flush with the rearmost end of the inner cylinder 100. The extension portion 410 is located on the outer periphery of one end of the inner cylinder 100 near the bottom 120, fitting as closely as possible to the outer periphery of the inner cylinder 100 without taking up additional space. The fan blade portion 420 is located behind the bottom 120, that is, beyond the range of the inner cylinder 100. It can be twisted and extended to form a fan blade-like shape. In the radial direction of the inner cylinder 100, it can be located inside or outside the outer periphery of the inner cylinder 100 without affecting the structure of the inner cylinder 100 itself.

[0074] In this embodiment, the shape of the drainage channel is not limited to the flat shape shown in the figure, and can also be set to a square, triangle or other shape, as long as it can play a role similar to fan blades when rotating with the inner cylinder 100 to generate negative pressure in the water collection chamber.

[0075] Furthermore, the cylinder wall 110 of the inner cylinder 100 includes a main body section 111 and a mounting section 112 connected to the cylinder bottom 120 . The diameter of the mounting section 112 is smaller than the diameter of the main body section 111 at one end close to the cylinder bottom 120 . The mounting section 112 and the main body section 111 are connected by a connecting wall 113 .

[0076] The drain port is provided on the connecting wall 113 , the drain channel 400 extends from the connecting wall 113 to the outside of the cylinder bottom 120 , and the extension portion 410 is provided on the outer periphery of the mounting section 112 .

[0077] Preferably, the surface of the extension portion 410 facing the mounting section 112 is arranged in contact with the outer circumference of the mounting section 112; and / or the surface of the extension portion 410 facing away from the mounting section 112 is flush with the outer circumference of the main body section 111 near the bottom 120.

[0078] In the optimal solution of this embodiment, the inner surface of the extension portion 410 is in contact with the outer peripheral surface of the installation section 112, which has a better fixing effect on the drainage channel 400. The outer surface of the extension portion 410 is flush with the rear end of the main body section 111, avoiding obstruction of the water in the inner cylinder 100 when entering the drainage channel 400 from the inner cylinder 100, making it easier for the water in the inner cylinder 100 to be discharged through the drainage channel 400.

[0079] In the preferred embodiment of the present invention, the connecting wall 113 has a conical structure with a gradually decreasing diameter extending from the main body section 111 to the mounting section 112. When there is a certain difference in diameter between the rear end of the main body section 111 and the mounting section 112, the area of the drain port can be larger, which is conducive to the smooth discharge of water in the inner tube 100.

[0080] More preferably, the diameter of the main body section 111 gradually increases from the end close to the cylinder mouth toward the cylinder bottom 120 , so that the water in the inner cylinder 100 flows more easily along the main body section 111 toward the cylinder bottom 120 , and then enters the drainage channel 400 and is discharged from the inner cylinder 100 .

[0081] In a further solution of this embodiment, at least two drainage channels 400 are connected to the inner cylinder 100, such as Figure 3 As shown by the middle dotted line, the outlet ends of the drainage channels 400 are located on the same plane perpendicular to the axis of the inner cylinder 100 .

[0082] Preferably, the at least two drainage channels 400 are evenly distributed along the circumference of the inner cylinder 100 .

[0083] In this embodiment, three drainage channels 400 are provided on the inner drum 100 , and the interval between two adjacent drainage channels 400 is 120°.

[0084] It is understandable that the number of drainage channels can also be two, four or other numbers, all of which can achieve similar technical effects.

[0085] In a further embodiment of the present invention, the water collection device 200 includes a bottom wall 210 and a side wall 220 surrounding the bottom wall 210. The side wall 220 is provided with a water outlet 201 oriented tangentially to the outer peripheral surface of the side wall 220. Arranging the water outlet 201 tangentially to the outer peripheral surface of the side wall 220 aligns with the direction of flow of the water and air within the water collection chamber under the rotation of the fan blade structure 300, i.e., the drainage channel 400. This further increases the velocity of the water and air flowing out of the water outlet 201, thereby facilitating the formation of a negative pressure environment within the water collection chamber and effectively preventing water from splashing out.

[0086] Preferably, the water outlet direction of the water outlet 201 is inclined downward relative to the horizontal direction, so that the gravity of the water flow can be used to further increase the speed of the drainage flowing out of the water outlet 201, thereby increasing the negative pressure level in the water collection chamber.

[0087] In the preferred solution of this embodiment, a water retaining ring 230 extending toward the inner periphery of the side wall 220 is provided at one end of the side wall 220 away from the bottom wall 210, and the portion of the inner cylinder 100 close to the cylinder bottom 120 is provided in the water collecting chamber, and there is a certain gap between the inner periphery of the water retaining ring 230 and the outer periphery of the inner cylinder 100.

[0088] In the above solution, the provision of water retaining ring 230 prevents water entering water collection device 200 from moving forward, thereby minimizing the length of water collection device 200 parallel to the axis of inner cylinder 100. This reduces the space occupied by water collection device 200 and provides more available space for expansion of inner cylinder 100. Furthermore, water retaining ring 230 extends from the front end of sidewall 220 toward the inner periphery of sidewall 220, thereby reducing the area of the front opening of water collection device 200 and, in other words, the width of the gap between the inner cylinder 100 and the opening of water collection device 200. This reduction in gap width also reduces the total gap area. Under a certain negative pressure within the water collection chamber, the velocity at which external air is drawn into water collection device 200 through this gap increases, further enhancing the effectiveness of preventing water splashing.

[0089] In this embodiment, the cross-section of the water collecting chamber perpendicular to the axis of the inner cylinder 100 can be designed to be circular or any other shape that is conducive to the drainage of the fluid, thereby ensuring that the water and air in the water collecting chamber are discharged smoothly and at high speed from the water outlet 201 to form a negative pressure environment in the water collecting chamber.

[0090] Preferably, the water collecting chamber has a logarithmic spiral projection on a plane perpendicular to the axis of the inner cylinder 100. Accordingly, the outline of the water collecting device 200 is also logarithmic spiral ( Figure 6 The dashed line in the center is a circular reference line. The cross-section of the water collection chamber is configured as a logarithmic spiral, giving the water collection device 200 a volute-like structure. When the drainage channel 400 rotates with the inner cylinder 100 within the water collection chamber, it operates similarly to a centrifugal pump, ensuring smooth flow of water and air within the water collection chamber and outflow through the outlet 201. This design of the water collection chamber's cross-section improves the guidance of fluids discharged through the outlet 201, further increasing the degree of negative pressure within the water collection chamber and preventing splashing.

[0091] In this embodiment, a fan blade structure 300 is connected to the inner drum 100. The fan blade structure 300 is located inside the water collection chamber of the water collection device 200 and rotates synchronously with the inner drum 100 during drainage, accelerating the flow of water and air within the water collection chamber and discharging them from the water outlet 201, thereby creating a negative pressure environment within the water collection chamber. The negative pressure environment within the water collection chamber allows air outside the water collection device 200 to be drawn into the water collection chamber through the gap between the water collection device 200 and the inner drum 100, thereby preventing water discharged into the water collection device 200 from splashing out of the gap. The fan blade structure 300 has a hollow channel connecting the inner drum 100 drain outlet and the water collection device 200. It also serves as a drainage channel 400 that guides water discharged from the inner drum 100 into the water collection device 200, reducing the degree of water splashing, further improving the effect of preventing water splashing, and avoiding excessive complexity of the internal structure of the drum washing machine.

[0092] Example 2

[0093] The difference between this embodiment and the above-mentioned embodiment 1 is that the fan blade structure and the drainage channel are respectively provided on the inner cylinder.

[0094] Specifically, the fan blade structure is connected to the outer periphery of the inner cylinder near one end of the cylinder bottom and includes at least two symmetrically arranged fan blades. The fan blade structure is only used to rotate synchronously with the inner cylinder to generate negative pressure in the water collection chamber, and no longer has a hollow channel to guide the inner cylinder to drain water.

[0095] The water inlet end of the drainage channel is connected to the wall or bottom of the inner tube, extends to the outside of the bottom of the inner tube in a direction parallel to the axis of the inner tube, and extends into the interior of the water collection device, so that the inner tube drainage enters the water collection chamber under the guidance of the drainage channel, reducing the splashing of water during the drainage process.

[0096] In this embodiment, the inner drum is equipped with a fan structure and a drainage channel. The latter is used to guide the drainage water flow to reduce the degree of water splashing, while the former is used to create negative pressure in the water collection chamber, thereby drawing external air into the water collection chamber through the gap between the water collection device and the inner drum, preventing the drainage in the water collection chamber from splashing out of the gap. The two functions together effectively prevent water leakage between the water collection device and the inner drum during the drum washing machine's drainage process, achieving essentially the same functional effects as the first embodiment.

[0097] Example 3

[0098] The difference between this embodiment and the above-mentioned embodiment 1 is that: the water collecting device or the inner cylinder is provided with a blowing device for blowing air from the outside of the water collecting device toward the gap between the water collecting device and the inner cylinder.

[0099] In this embodiment, the blowing device is set to blow air from the outside of the water collection device to the gap, so that the gap produces a larger resistance to movement from the inside to the outside, and can also play a similar role as the above-mentioned embodiment one or two, preventing drainage from splashing out of the gap.

[0100] 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, comprising: The inner drum is used to independently hold water during the washing / rinsing process, and a drain port is provided on the inner drum. The drain port is blocked by a sealing assembly during the washing and rinsing process; a water collecting device having a water collecting chamber communicated with the drain outlet; It is characterized in that it also includes a fan blade structure at least partially disposed in the water collecting chamber, and the fan blade structure rotates to form a negative pressure in the water collecting chamber; The sealing component can open the drain port to drain water under the action of centrifugal force; The fan blade structure is connected to the inner cylinder and rotates synchronously with the inner cylinder.

2. The drum washing machine according to claim 1, characterized in that: The water collecting device is arranged on the side of the bottom of the inner cylinder, and the fan blade structure extends from the inner cylinder to the water collecting device, with the extension end located outside the bottom of the inner cylinder and inside the water collecting cavity.

3. The drum washing machine according to claim 2, characterized in that: The fan blade structure is connected to the outer periphery of the inner cylinder near one end of the cylinder bottom.

4. The drum washing machine according to claim 1, characterized in that: The fan blade structure has a hollow channel connecting the water collection cavity and the drainage port of the inner cylinder, so that the fan blade structure forms a drainage channel for discharging water from the inner cylinder to the water collection device.

5. The drum washing machine according to claim 4, characterized in that: The water inlet end of the drainage channel is connected to the drainage port of the inner cylinder, and the water outlet end is arranged inside the water collecting cavity.

6. The drum washing machine according to claim 5, characterized in that: The water inlet end of the drainage channel is a strip extending a certain length along the circumference of the inner cylinder, and the water outlet end of the drainage channel is a strip matching the shape of the water inlet end, and there is a certain torsion angle between the extension direction of the strip water outlet end and the extension direction of the strip water inlet end.

7. The drum washing machine according to claim 6, characterized in that: The torsion angle is 30° to 60°.

8. The drum washing machine according to claim 6, characterized in that: The drainage channel includes an extension portion and a fan blade portion in sequence from the water inlet end to the water outlet end; the extension portion extends a certain length from the drainage outlet of the inner tube in a direction parallel to the axis of the inner tube, and the fan blade portion gradually twists and extends from the extension end of the extension portion, so that there is a certain twist angle between the water outlet end and the water inlet end.

9. The drum washing machine according to claim 8, characterized in that: The connection between the extension portion and the blade portion is flush with the rearmost end of the inner tube.

10. The drum washing machine according to claim 8, characterized in that: The wall of the inner cylinder includes a body section and a mounting section connected to the bottom of the cylinder. The diameter of the mounting section is smaller than the diameter of the end of the body section close to the bottom of the cylinder. The mounting section and the body section are connected by a connecting wall. The drain port is arranged on the connecting wall, the drain channel extends from the connecting wall to the outside of the cylinder bottom, and the extension portion is arranged on the outer periphery of the installation section.

11. The drum washing machine according to claim 10, characterized in that: The surface of the extension portion facing the mounting section is arranged in contact with the outer circumference of the mounting section; and / or the surface of the extension portion facing away from the mounting section is flush with the outer circumference of the body section near the bottom end of the cylinder.

12. The drum washing machine according to claim 10, characterized in that: The connecting wall has a tapered structure with a gradually decreasing diameter extending from the main body section to the mounting section.

13. The drum washing machine according to claim 6, characterized in that: At least two drainage channels are connected to the inner cylinder, and the water outlet ends of the drainage channels are located on the same plane perpendicular to the axis of the inner cylinder.

14. The drum washing machine according to claim 13, characterized in that: The at least two drainage channels are evenly distributed along the circumference of the inner cylinder.

15. The drum washing machine according to any one of claims 1 to 14, characterized in that: The water collecting device comprises a bottom wall and a side wall surrounding the bottom wall. The side wall is provided with a water outlet facing the tangent direction of the outer peripheral surface of the side wall.

16. The drum washing machine according to claim 15, characterized in that: The water outlet direction of the water outlet is inclined downward.

17. The drum washing machine according to claim 15, characterized in that: A water retaining ring extending toward the inner periphery of the side wall is provided at one end of the side wall away from the bottom wall. The portion of the inner cylinder close to the cylinder bottom is provided in the water collecting cavity. There is a certain gap between the inner periphery of the water retaining ring and the outer periphery of the inner cylinder.

18. The drum washing machine according to claim 15, characterized in that: The water collecting chamber has a logarithmic spiral projection on a plane perpendicular to the axis of the inner cylinder.

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