Drum washing machine having an outer tub and the outer tub

Abstract

The application discloses an outer cylinder and a drum washing machine with the same, wherein the outer cylinder comprises an outer cylinder body with an open end, a heater mounting groove recessed outward is arranged on the inner wall of the outer cylinder body, a baffle extends to the opening of the heater mounting groove, and a grid structure is arranged at the bottom of the baffle to enhance the impact force of water flow in the heater mounting groove on the heater. In the application, the baffle blocks the water flow from flowing out of the heater mounting groove, the grid structure not only prevents the water flow in the heater mounting groove from splashing outside the heater mounting groove, but also enables the water flow in the heater mounting groove to form a turbulent water flow, enhances the impact force of the water flow on the heater, and improves the cleaning effect of the water flow on the scale on the surface of the heater.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of washing machines, in particular, relates to an outer drum and a drum washing machine with the same. BACKGROUND

[0002] At present, washing machines have been widely used in families, which are generally divided into pulsator washing machines and drum washing machines. The pulsator washing machine washes clothes through the water flow generated by the operation of the pulsator in the washing tub, while the drum washing machine washes clothes through the vertical falling of clothes caused by the rotation of the drum. Compared with the pulsator washing machine, the drum washing machine not only consumes less water, but also is less likely to cause the entanglement and wrinkle of the washing clothes.

[0003] With the diversification of user's functional requirements for washing machines, the existing drum washing machine increases the heating function, which heats the washing water during the washing process, can not only make the additive fully play the decontamination efficiency, but also can play the role of sterilization and disinfection. Especially the drum washing machine with steam washing function can effectively kill the microorganisms attached to the clothes through high-temperature steam. However, after a period of use, a layer of scale will be attached to the surface of the heating device, which affects the heat dissipation and even causes damage to the heating device, which exists a safety hazard.

[0004] For example, a drum washing machine is disclosed in Chinese patent, which comprises an outer drum and an inner drum, and further comprises a heating device and an ultrasonic wave generating device arranged in the inner part of the outer drum. The heating device comprises a mounting member and a heating member connected with each other, and the mounting member is connected with the inner wall of the outer drum. The ultrasonic wave generating device is installed on the inner bottom wall of the outer drum, and the ultrasonic wave generating device can clean the heating member and the inner drum. However, the ultrasonic wave generating device is easy to be damaged, the disassembly and assembly are complicated, and the use process is accompanied by noise, which affects the user's experience.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide an outer drum to improve the cleaning effect of water flow on the scale on the surface of the heater.

[0007] To solve the above technical problems, the basic idea of the technical solution of the present application is:

[0008] An outer drum comprises an outer drum body with an open end, a heater mounting groove recessed outward is arranged on the inner wall of the outer drum body, and a baffle extending to the opening of the heater mounting groove is arranged on the outer drum body. A grid structure is arranged on the bottom of the baffle to enhance the impact force of the water flow in the heater mounting groove on the heater.

[0009] Further, the inner wall of the bottom of the outer cylinder body is recessed along the axial direction of the outer cylinder body to form a heater mounting groove, and the baffle is arranged on at least one side of the heater mounting groove along the circumferential direction of the outer cylinder body, and the bottom of the baffle is arranged with the grid fins extending in the same direction as the baffle.

[0010] Preferably, the baffle is arranged on the side of the heater mounting groove facing the rotation direction of the inner cylinder.

[0011] Further, the grid fins and the baffle are respectively inclined upward from one side of the heater mounting groove toward the opening of the heater mounting groove;

[0012] Preferably, the bottom wall of the grid fin and the inner wall of the baffle are respectively inclined surfaces gradually inclined upward toward the opening direction of the heater mounting groove;

[0013] More preferably, the bottom wall of the grid fin and the inner wall of the baffle have the same inclination.

[0014] Further, the adjacent grid fins and the baffle enclose a downwardly open water collecting groove extending toward the opening of the heater mounting groove;

[0015] Preferably, the extension end of the water collecting groove has an opening.

[0016] Further, the bottom wall of the water collecting groove is inclined upward from one side of the heater mounting groove, and the water collecting groove is a groove with a narrow upper part and a wide lower part.

[0017] Further, the grid fins are vertically arranged on the bottom of the baffle, and the cross section of the grid fin is a trapezoidal or triangular shape with a wide upper part and a narrow lower part;

[0018] Preferably, the cross section of the grid fin is an isosceles trapezoidal or isosceles triangular shape.

[0019] Further, the two sides of the heater mounting groove along the circumferential direction of the outer cylinder body correspondingly have a first baffle and a second baffle, the bottom of the first baffle is arranged with first grid fins extending in the same direction as the first baffle, and the bottom of the second baffle is arranged with second grid fins extending in the same direction as the second baffle.

[0020] Further, the first grid fins and the first baffle, and the second grid fins and the second baffle are respectively inclined upward from one side of the heater mounting groove toward the opening of the heater mounting groove;

[0021] Preferably, the bottom wall of the first grid fin and the inner wall of the second baffle, and the bottom wall of the second grid fin and the inner wall of the second baffle are respectively inclined surfaces gradually inclined upward toward the opening direction of the heater mounting groove;

[0022] More preferably, the bottom wall of the first grid fin and the inner wall of the first baffle have the same inclination, and the bottom wall of the second grid fin and the inner wall of the second baffle have the same inclination.

[0023] Further, the first baffle is arranged on the side of the heater mounting groove facing the rotation direction of the inner drum, and the second baffle is arranged on the side of the heater mounting groove facing away from the rotation direction of the inner drum, and the lowest end of the bottom wall of the first baffle is higher than the lowest end of the bottom wall of the second baffle.

[0024] Preferably, the size of the first baffle extending to the opening of the heater mounting groove is greater than or equal to the size of the second baffle extending to the opening of the heater mounting groove.

[0025] Another object of the present application is to provide a drum washing machine to achieve the purpose of cleaning the scale on the surface of the heater and improving the washing effect of the washing machine.

[0026] A drum washing machine comprises the outer drum and the inner drum arranged in the inner drum of any of the above-mentioned outer drums, and the heater mounting groove is open to the inner drum, and the gap is formed between the outer wall of the baffle and the outer wall of the inner drum.

[0027] Compared with the prior art, the present application has the following beneficial effects.

[0028] 1. In the present application, the baffle blocks the water flow from the heater mounting groove, and the grid structure not only prevents the water flow in the heater mounting groove from splashing outside the heater mounting groove, but also forms a turbulent water flow in the heater mounting groove, thereby enhancing the impact force of the water flow on the heater and improving the cleaning effect of the water flow on the scale on the surface of the heater.

[0029] 2. In the present application, the first baffle and the second baffle on both sides of the heater mounting groove concentrate the water flow in the heater mounting groove, and the first grid and the second grid at the bottom of the first baffle and the second baffle further concentrate the water flow, thereby preventing the water flow from splashing outside the heater mounting groove after impacting the surface of the heater.

[0030] 3. In the present application, the heater mounting groove is open to the inner drum, so that the washing water flows into the heater mounting groove, and then the water flow in the heater mounting groove forms a turbulent water flow through the baffle and the grid structure arranged at the bottom of the baffle, and the gap is formed between the outer wall of the baffle and the outer wall of the inner drum to ensure the safety of the rotation of the inner drum.

[0031] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained based on these drawings without creative labor for those skilled in the art. In the drawings:

[0033] Figure 1 is a structural schematic diagram of an outer cylinder in an embodiment of the present application;

[0034] Figure 2 is a partial enlarged view of A in Figure 1

[0035] Figure 3 is a schematic diagram of a grid structure in an embodiment of the present application;

[0036] Figure 4 is a side view of a grid structure in an embodiment of the present application;

[0037] Figure 5 is a front view of a grid structure in an embodiment of the present application.

[0038] in the figure:

[0039] 100, outer cylinder body;

[0040] 200, heater mounting groove; 201, side wall; 202, bottom wall;

[0041] 300, baffle; 301, first baffle; 302, second baffle; 303, connecting hole;

[0042] 400, grid sheet; 401, first grid sheet; 402, second grid sheet; 403, water collecting groove.

[0043] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0045] In the description of the present application, it should be noted that the terms “upper”, “lower”, “front”, “rear”, “left”, “right”, “longitudinal”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0046] ​In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Example 1

[0048] like Figures 1 to 5 As shown, an embodiment of the present invention provides an outer cylinder, including an outer cylinder body 100 with one end open. The inner wall of the outer cylinder body 100 is provided with an outwardly recessed heater mounting groove 200 and a baffle 300 extending into the opening of the heater mounting groove 200. The bottom of the baffle 300 is provided with a grid structure for enhancing the impact force of the water flow in the heater mounting groove 200 on the heater.

[0049] In this embodiment, the inner cylinder is fitted inside the outer cylinder, the heater mounting groove 200 faces the opening of the inner cylinder, the water flow between the outer cylinder and the inner cylinder flows into the heater mounting groove 200, and the baffle 300 prevents the water flow from flowing out of the heater mounting groove 200.

[0050] like Figures 1 to 5 As shown, in this embodiment, the baffle 300 is provided with a connection hole 303. Fasteners pass through the connection hole 303 on the baffle 300 and are fixedly connected to the baffle 300 and the outer cylinder body 100 to ensure the tightness of the connection between the two; or, the baffle 300 and the outer cylinder body 100 are integrally formed, making the processing more convenient.

[0051] In this embodiment, the water flow between the outer cylinder and the inner cylinder falls into the heater mounting groove 200 and impacts the heater. Some of the water flowing upwards is blocked by the grid structure and falls back into the heater mounting groove 200. That is, the gravitational potential energy of the water flow is converted into kinetic energy. The water flow with a certain speed impacts the heater. The grid structure can not only prevent the water flow from splashing to the outside of the heater mounting groove 200, but also make the water flow in the heater mounting groove 200 form a turbulent water flow, which enhances the impact force of the water flow on the heater and improves the cleaning effect of the water flow on the scale on the heater surface.

[0052] like Figure 1 and Figure 2As shown, the inner wall of the bottom of the outer cylinder body 100 is recessed along the axial direction of the outer cylinder body 100 to form a heater mounting groove 200, and the baffle 300 is arranged on at least one side of the heater mounting groove 200 along the circumferential direction of the outer cylinder body 100. The bottom of the baffle 300 is spaced apart from the grid fins 400 which extend in the same direction as the baffle 300. The water flow moves upward after impacting the heater, and part of the upwardly moving water flow moves between adjacent grid fins 400 and impacts the baffle 300 to fall back. The grid fins 400 make the water flow more concentrated, and the impact force of the water flow is positively correlated with the speed and flow rate when falling onto the surface of the heater.

[0053] Preferably, the baffle 300 is arranged on the side of the heater mounting groove 200 facing the rotation direction of the inner cylinder, so that the water flow between the outer cylinder and the inner cylinder flows better into the heater mounting groove 200, ensuring the water flow rate in the heater mounting groove 200 and improving the impact force of the water flow.

[0054] As shown in the drawings, Figures 3 to 5 In this embodiment, the baffle 300 and the grid fins 400 are joined by rotation welding, or are bonded by high-frequency bonding, or the baffle 300 is integrally formed with the outer cylinder body 100, or the two are combined by any means.

[0055] As shown in the drawings, Figure 1 and Figure 2 The grid fins 400 and the baffle 300 are respectively inclined upward from one side of the heater mounting groove 200 toward the opening of the heater mounting groove 200, so that the kinetic energy of the water flow moving upward after impacting the heater is converted into gravitational potential energy before the water flow impacts the grid fins 400 and the baffle 300, preventing the water flow from splashing outside the heater mounting groove 200 due to excessively high flow rate when the water flow impacts the grid fins 400 and the baffle 300.

[0056] Preferably, the bottom wall of the grid fin 400 and the inner wall of the baffle 300 are respectively inclined surfaces gradually inclined upward toward the opening direction of the heater mounting groove 200, so that the water flow is as concentrated as possible between adjacent grid fins 400, ensuring the water flow reciprocating between the heater, the grid fins 400 and the baffle 300.

[0057] More preferably, the bottom wall of the grid fin 400 and the inner wall of the baffle 300 have the same slope, which is simple in structure and convenient to process, and has a significant water flow concentration effect.

[0058] As shown in the drawings, Figure 1 and Figure 2As shown, the adjacent grid sheet 400 and the baffle 300 surround a downwardly open water collecting groove 403 extending to the opening of the heater mounting groove 200, and the water flow impacting the heater and moving upward is concentrated in the water collecting groove 403, which not only can concentrate the water flow, increase the water flow and improve the impact force of the water flow on the surface of the heater, but also can adjust the direction of the water flow to make the water flow impact the surface of the heater after falling back.

[0059] Preferably, the extending end of the water collecting groove 403 has an opening, so that the water flow reciprocates better and then impacts the surface of the heater.

[0060] As shown in the drawings, Figures 3 to 5 The bottom wall of the water collecting groove 403 extends upwardly from one side of the heater mounting groove 200, and the water collecting groove 403 is a groove with a narrow upper part and a wide lower part.

[0061] In this embodiment, after the upwardly moving water flow impacts the baffle 300, the water collecting groove 403 is a groove with a narrow upper part and a wide lower part, the water collecting groove 403 guides the water flow to flow downwardly in a radial manner, which can increase the coverage area of the water flow and better impact the surface of the heater.

[0062] As shown in the drawings, Figures 3 to 5 The grid sheet 400 is vertically arranged at the bottom of the baffle 300, the cross section of the grid sheet 400 is a trapezoid or a triangle with a wide upper part and a narrow lower part, after the upwardly moving water flow impacts the baffle 300, the water collecting groove 403 is a groove with a narrow upper part and a wide lower part, the water collecting groove 403 guides the water flow to flow downwardly in a radial manner, which can increase the coverage area of the water flow and better impact the surface of the heater.

[0063] Preferably, the cross section of the grid sheet 400 is an isosceles trapezoid or an isosceles triangle, so as to form the water collecting groove 403 extending in the same direction as the baffle 300 with a narrow upper part and a wide lower part.

[0064] Through the above-mentioned outer cylinder, the baffle 300 blocks the water flow from flowing out of the heater mounting groove 200, and the grid structure not only can prevent the water flow in the heater mounting groove 200 from splashing outside the heater mounting groove 200, but also can make the water flow in the heater mounting groove 200 form a turbulent water flow, enhance the impact force of the water flow on the heater, and improve the cleaning effect of the water flow on the scale on the surface of the heater.

[0065] Embodiment Two

[0066] As shown in the drawings, Figures 1 to 5 In this embodiment, the heater mounting groove 200 is further limited based on the above-mentioned embodiment one, and the first baffle 301 and the second baffle 302 are correspondingly arranged at the two sides of the circumference of the outer cylinder body 100, the first grid sheet 401 extending in the same direction as the first baffle 301 is arranged at the bottom of the first baffle 301 in a spaced manner, and the second grid sheet 402 extending in the same direction as the second baffle 302 is arranged at the bottom of the second baffle 302 in a spaced manner.

[0067] In this embodiment, the first baffle 301 and the second baffle 302 on both sides of the heater installation groove 200 make the water flow concentrate in the heater installation groove 200, and the first grid and the second grid at the bottom of the first baffle 301 and the second baffle 302 make the water flow further concentrate, avoiding the water flow splashing outside the heater installation groove 200 after impacting the surface of the heater.

[0068] As shown in Figure 1 and Figure 2 , the first grid piece 401 and the first baffle 301, the second grid piece 402 and the second baffle 302 are respectively inclined upward from one side of the heater installation groove 200 toward the opening of the heater installation groove 200, so that the kinetic energy of the water flow moving upward after impacting the heater is converted into gravitational potential energy before the water flow collides with the grid piece 400 and the baffle 300, preventing the water flow from splashing outside the heater installation groove 200 due to excessively high flow rate when the water flow collides with the grid piece 400 and the baffle 300 after impacting the heater.

[0069] Preferably, the bottom wall of the first grid piece 401 and the inner wall of the second baffle 302, and the bottom wall of the second grid piece 402 and the inner wall of the second baffle 302 are respectively inclined surfaces gradually inclined upward toward the opening direction of the heater installation groove 200, so that the water flow is concentrated as much as possible between adjacent grid pieces 400, ensuring the water flow reciprocating between the heater, the grid piece 400 and the baffle 300.

[0070] More preferably, the bottom wall of the first grid piece 401 and the inner wall of the first baffle 301 have the same slope, and the bottom wall of the second grid piece 402 and the inner wall of the second baffle 302 have the same slope, which is simple in structure, convenient to process, and has a significant water flow concentration effect.

[0071] As shown in Figure 1 and Figure 2 , the first baffle 301 is arranged on the side of the heater installation groove 200 facing the rotation direction of the inner cylinder, and the second baffle 302 is arranged on the side of the heater installation groove 200 facing away from the rotation direction of the inner cylinder, and the lowest end of the bottom wall of the first baffle 301 is higher than the lowest end of the bottom wall of the second baffle 302. The inner cylinder rotates at high speed under the drive of the motor, and most of the washing water and foam attached to the outer wall of the inner cylinder are thrown to the side of the inner wall of the outer cylinder body 100 facing away from the rotation direction of the inner cylinder under the action of centrifugal force, and then flow into the first baffle 301 arranged on the side facing away from the rotation direction of the inner cylinder of the heater installation groove 200.

[0072] Preferably, the first baffle 301 extends to the opening of the heater mounting groove 200 with a size greater than or equal to the size of the second baffle 302 extending to the opening of the heater mounting groove 200, so as to prevent the water splashing to the outside of the heater mounting groove 200 on the side of the inner wall of the outer drum body 100 facing away from the rotation direction of the inner drum under the action of the centrifugal force.

[0073] As shown in Figure 1 and Figure 2 , the extension length of the side wall 201 of the heater mounting groove 200 close to the second baffle 302 is less than the extension length of the side wall 201 of the heater mounting groove 200 close to the first baffle 301, so that the washing water flows more smoothly and more quickly from the first baffle 301 to the second baffle 302, and better impacts the surface of the heater.

[0074] As shown in Figures 1 to 5 , the curvature of the side wall 201 of the heater mounting groove 200 close to the second baffle 302 is greater than the curvature of the side wall 201 of the heater mounting groove 200 close to the first baffle 301, so that the washing water flows more smoothly and more quickly from the first baffle 301 to the second baffle 302, and better impacts the surface of the heater.

[0075] As shown in Figure 1 and Figure 2 , the bottom wall 202 of the heater mounting groove 200 extends downwardly along the rotation direction of the inner drum, the drain port is arranged at the lowest part of the bottom wall 202 of the heater mounting groove 200, the washing water on the first baffle 301 flows downwardly into the heater mounting groove 200, the drain port is arranged at the lowest part of the bottom wall 202 of the heater mounting groove 200, and the washing water inside the heater mounting groove 200 can flow more smoothly into the drain port and be discharged outside the washing machine.

[0076] Through the above-mentioned outer drum, the first baffle 301 and the second baffle 302 are oppositely arranged at both sides of the heater mounting groove 200 to make the water flow concentrate in the heater mounting groove 200, and the first grid and the second grid corresponding to the bottom of the first baffle 301 and the second baffle 302 make the water flow further concentrate, avoiding the water flow splashing to the outside of the heater mounting groove 200 after impacting the surface of the heater.

[0077] Embodiment three

[0078] In the embodiment of the present application, a drum washing machine is provided, which comprises the above-mentioned outer drum and an inner drum arranged inside the outer drum, the heater mounting groove 200 is open to the inner drum, and a gap is formed between the outer wall of the baffle 300 and the outer wall of the inner drum.

[0079] In the embodiment, the heater installation groove 200 is open to the inner cylinder, so that washing water flows into the heater installation groove 200, and then the water flow in the heater installation groove 200 is formed into a turbulent flow by the baffle 300 and the grid structure arranged at the bottom of the baffle 300, and the outer wall of the baffle 300 and the outer wall of the inner cylinder have a gap, which ensures the safety of the rotation of the inner cylinder.

[0080] The above merely describes the preferred embodiments of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content with equivalent embodiments of equivalent changes, without departing from the technical solution of the present application. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A tub for a washing machine, the tub comprising a tub body having an open end, a heater mounting groove recessed outwardly formed on an inner wall of the tub body, and a baffle extending toward an opening of the heater mounting groove, characterized in that: The bottom of the baffle is provided with a grid structure for enhancing the impact force of water flow in the heater mounting groove on the heater; the inner wall of the bottom of the outer cylinder body is recessed along the axial direction of the outer cylinder body to form the heater mounting groove, and the baffle is arranged on at least one side of the heater mounting groove along the circumferential direction of the outer cylinder body, and the bottom of the baffle is spaced apart and provided with grid fins extending in the same direction as the baffle.

2. An outer tube according to claim 1, wherein: The baffle is arranged on the side of the heater mounting groove facing the rotation direction of the inner cylinder.

3. An outer tube according to claim 1, wherein: The grid fins and the baffle are respectively inclined upward from one side of the heater mounting groove toward the opening of the heater mounting groove.

4. An outer tube according to claim 3, wherein: The bottom wall of the grid fin and the inner wall of the baffle are respectively inclined surfaces gradually inclined upward toward the opening direction of the heater mounting groove.

5. An outer tube according to claim 4, wherein: The bottom wall of the grid fin and the inner wall of the baffle have the same inclination.

6. An outer tube according to claim 3, wherein: The adjacent grid fins and the baffle enclose a downwardly open water collecting groove extending toward the opening of the heater mounting groove. The extension end of the water collecting groove has an opening.

7. An outer tube according to claim 6, wherein: The bottom wall of the water collecting groove is inclined upward from one side of the heater mounting groove, and the water collecting groove is a groove with a narrow upper part and a wide lower part.

8. An outer tube according to claim 7, wherein: The grid fins are vertically arranged on the bottom of the baffle, and the cross section of the grid fin is a trapezoidal or triangular shape with a wide upper part and a narrow lower part.

9. An outer tube according to claim 8, wherein: The cross section of the grid fin is an isosceles trapezoidal or isosceles triangular shape.

10. An outer tube according to any one of claims 1 to 9, characterized in that: The first baffle and the second baffle are respectively arranged on both sides of the heater mounting groove along the circumferential direction of the outer cylinder body, the bottom of the first baffle is spaced apart and provided with first grid fins extending in the same direction as the first baffle, and the bottom of the second baffle is spaced apart and provided with second grid fins extending in the same direction as the second baffle.

11. An outer tube according to claim 10, wherein: The first grid fins and the first baffle, and the second grid fins and the second baffle are respectively inclined upward from one side of the heater mounting groove toward the opening of the heater mounting groove.

12. An outer tube according to claim 11, wherein: The bottom wall of the first grid fin and the inner wall of the second baffle, and the bottom wall of the second grid fin and the inner wall of the second baffle are respectively inclined surfaces gradually inclined upward toward the opening direction of the heater mounting groove.

13. An outer tube according to claim 12, wherein: The bottom wall of the first grid fin and the inner wall of the first baffle have the same inclination, and the bottom wall of the second grid fin and the inner wall of the second baffle have the same inclination.

14. The outer tube of claim 11, wherein: The first baffle is arranged on the side of the heater mounting groove facing the rotation direction of the inner cylinder, the second baffle is arranged on the side of the heater mounting groove away from the rotation direction of the inner cylinder, and the lowest end of the bottom wall of the first baffle is higher than the lowest end of the bottom wall of the second baffle.

15. An outer tube according to claim 14, wherein: The size of the first baffle extending toward the opening of the heater mounting groove is greater than or equal to the size of the second baffle extending toward the opening of the heater mounting groove.

16. A drum washing machine characterised in that: The outer cylinder and the inner cylinder arranged inside the outer cylinder are included, the heater mounting groove is open toward the inner cylinder, and there is a gap between the outer wall of the baffle and the outer wall of the inner cylinder.

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