A drum assembly and a drum washing machine

Abstract

The application belongs to the technical field of washing machines, and discloses an inner drum assembly and a drum washing machine, the inner drum assembly comprising: an inner drum, a drum wall of the inner drum having staggered heating areas and non-heating areas, the heating areas being used for heating under excitation of an alternating magnetic field; a separation part arranged inside the inner drum and used for separating the inner drum into a heating cavity and a washing cavity; the heating areas of the drum wall constituting part of cavity walls of the heating cavity, and the non-heating areas constituting part of cavity walls of the washing cavity.In the application, the inner part of the inner drum is separated into the heating cavity and the washing cavity, water in the heating cavity can be heated by the heating areas of the drum wall, and the heat is then transmitted to the washing cavity, clothes placed in the washing cavity will not directly contact the heating areas, and the clothes can be protected from being scalded.

Description

TECHNICAL FIELD

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

[0002] In recent years, in order to solve the problem that dirt is easily accumulated between the inner drum and the outer drum of the washing machine and is difficult to clean, the washing machine industry has developed a non-porous inner drum washing machine, that is, no dehydration hole is arranged on the inner drum, so that the inner drum can independently hold washing water during the washing process. Through the above-mentioned mode, the storage of water between the inner drum and the outer drum during the washing process can be avoided, the amount of washing water is saved, and the accumulation of dirt between the inner drum and the outer drum is largely avoided, so that the dirt between the inner drum and the outer drum does not enter the inner drum to pollute the clothes, and clean and sanitary washing is achieved. However, since there is no water between the inner drum and the outer drum during the washing process, the washing water cannot be heated by the form of arranging a heating pipe in the outer drum in the traditional washing machine.

[0003] In order to solve the above-mentioned problem, the prior art proposes a scheme of applying an electromagnetic heating device to heat the washing water in the washing machine. For example, a washing machine and a control method thereof are disclosed in Chinese Patent No. 201910767689.3, which comprises: an inner drum having a washing chamber for independently holding washing water; an outer drum arranged outside the inner drum; and an electromagnetic heating device arranged on the side wall of the outer drum and corresponding to the side wall of the inner drum.

[0004] However, in the above-mentioned scheme, since the side wall of the inner drum is self-heated under the action of the electromagnetic heating device, the side wall of the inner drum may have a high temperature, and there is a risk of being scalded when the clothes directly contact the side wall of the inner drum. In addition, when the clothes in the drum directly adhere to the side wall of the inner drum, the side wall of the inner drum may not be able to fully contact the washing water. At this time, the heat generated by the side wall of the inner drum cannot be quickly dissipated into the water, which causes the temperature of the side wall of the inner drum to rapidly increase, further increasing the probability of the clothes in the drum being scalded by the high-temperature side wall of the inner drum, resulting in damage to the clothes.

[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 inner drum assembly and a drum washing machine, two chambers are separated in the inner drum, one of the chambers can heat the washing water by electromagnetic heating, and the clothes are placed in the other chamber and do not contact the heated area of the inner drum, thereby protecting the clothes in the drum from being scalded.

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

[0008] An inner drum assembly comprises:

[0009] an inner cylinder, a cylinder wall of the inner cylinder having heating regions and non-heating regions arranged alternately, the heating regions being used for heating under excitation of an alternating magnetic field;

[0010] a partition arranged inside the inner cylinder and used for partitioning the inner cylinder into a heating cavity and a washing cavity;

[0011] the heating regions of the cylinder wall constitute part of cavity walls of the heating cavity, and the non-heating regions constitute part of cavity walls of the washing cavity.

[0012] Further, the inner cylinder has a cylinder bottom; the heating regions and the non-heating regions are arranged alternately along an axial direction of the inner cylinder, wherein the heating regions are arranged on the cylinder wall close to the cylinder bottom;

[0013] the washing cavity is in communication with a cylinder opening of the inner cylinder, and the partition is provided with a water-permeable structure for communicating the heating cavity and the washing cavity.

[0014] Further, the partition is a partition plate parallel to the cylinder bottom, and the water-permeable structure is a water-permeable hole opened on the partition plate; an outer periphery of the partition plate is connected to an inner surface of the cylinder wall, and the outer periphery of the partition plate is connected at a joint between the heating region and the non-heating region.

[0015] Further, the water-permeable hole is arranged on the partition plate close to the outer periphery and is arranged in multiple in a circumferential direction.

[0016] Further, the partition comprises:

[0017] a first extension part connected to the inner surface of the cylinder wall at the joint between the heating region and the non-heating region and extending towards a central axis of the inner cylinder;

[0018] a second extension part extending from an extension end of the first extension part towards the cylinder bottom, and an extension end of the second extension part being connected to an inner surface of the cylinder bottom;

[0019] the partition, the heating regions of the cylinder wall, and an outer peripheral region of the cylinder bottom jointly enclose the heating cavity.

[0020] Further, the first extension part extends obliquely towards the central axis of the inner cylinder and gradually approaches the cylinder bottom.

[0021] Further, the water-permeable structure is a water-permeable hole opened on the first extension part.

[0022] Further, the water-permeable hole is arranged in multiple in a circumferential direction on the first extension part;

[0023] Preferably, the water-permeable hole is arranged in a circumferential direction in one circle and in an axial direction in at least two circles.

[0024] Further, the partition is welded to the inner surface of the inner drum.

[0025] A drum washing machine comprises the inner drum assembly, and further comprises an electromagnetic heating device arranged outside the inner drum.

[0026] The electromagnetic heating device generates an alternating magnetic field radiating outward, and the alternating magnetic field forms a radiation area on the drum wall of the inner drum, which is inside the heating area of the drum wall.

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

[0028] In the present application, the inner drum is provided with a partition, so as to divide the inner drum into a heating cavity and a washing cavity. The heating area on the drum wall can heat up under the excitation of the alternating magnetic field, and directly heats the water in the heating cavity. The heated water can enter the washing cavity or transfer heat to the washing cavity. The clothes placed in the washing cavity will not contact the heating area, so as to avoid the clothes being scalded by the drum wall and protect the clothes.

[0029] In the present application, the area of the drum wall close to the drum bottom is set as the heating area, so as to set the heating cavity at one end of the drum bottom, and set the washing cavity to directly communicate with the drum opening of the inner drum, without affecting the taking and placing of the clothes. The inner space of the inner drum is divided by the partition plate parallel to the drum bottom, which is simple in structure and easy to process. The water-permeable holes are arranged on the outer periphery of the partition plate, so as to ensure that the water flow exchange between the heating cavity and the washing cavity can be realized at a low water level.

[0030] In the present application, the partition composed of the first extension and the second extension can form a nearly annular heating cavity at one end of the inner drum close to the drum bottom. Correspondingly, the washing cavity can extend from the drum opening to the drum bottom in the axial direction, which can not only avoid the clothes contacting the heating area, but also increase the size of the washing cavity along the axial direction of the inner drum under the condition that the size of the inner drum is constant, so as to ensure that the drum washing machine has a large washing capacity.

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

[0032] The accompanying drawings, which are part of the present application, 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 accompanying drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0033] Figure 1is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment one of the present application;

[0034] Figure 2 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment one of the present application; Figure 1 is the front view of the structure shown in the embodiment one of the present application;

[0035] Figure 3 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment one of the present application; Figure 2 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment one of the present application;

[0036] Figure 4 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment two of the present application;

[0037] Figure 5 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment two of the present application; Figure 4 is the front view of the structure shown in the embodiment two of the present application;

[0038] Figure 6 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment two of the present application; Figure 5 is the structure diagram of the inner drum assembly and the electromagnetic heating device in the drum washing machine of the embodiment two of the present application;

[0039] Figure 7 is the enlarged diagram of C in the embodiment two of the present application. Figure 6 In the figure: 100, inner drum; 110, drum wall; 120, drum bottom; 140, separation part; 141, separation plate; 142, first extension part; 143, second extension part; 150, water permeable hole; 161, heating cavity; 162, washing cavity; 200, electromagnetic heating device; M, heating area; N, non-heating area.

[0040] 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.

[0041] DETAILED DESCRIPTION In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application, and the following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship based on 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 therefore cannot be understood as limiting the device or element indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0043]

[0044] ​In the description of the present application, it is necessary to point out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] As shown in Figures 1 to 6 Embodiments of the present application provide an inner drum assembly, and a drum washing machine comprising the inner drum assembly.

[0046] Specifically, the drum washing machine comprises a cabinet, and the inner drum assembly is arranged inside the cabinet. The inner drum assembly comprises an inner drum 100 for placing clothes, and the axis of the inner drum 100 is arranged in a horizontal or nearly horizontal direction. The inner drum 100 can independently hold water during the washing process. The outer side of the inner drum 100 can be provided with an outer drum, or only a water collecting device for receiving the drainage of the inner drum 100.

[0047] The drum washing machine described above can independently hold water through the inner drum 100, thereby greatly reducing the water consumption of the washing machine compared with the conventional washing machine, and avoiding the problem of dirt adhesion between the inner drum and the outer drum.

[0048] Further, since the drum washing machine independently holds water by using the inner drum 100, in order to realize the non-contact heating function of the washing water in the drum, the drum washing machine further comprises an electromagnetic heating device 200. At the same time, in order to cooperate with the electromagnetic heating device 200, the inner drum 100 is at least partially made of a metal material that can generate eddy current in an alternating magnetic field.

[0049] Specifically, the electromagnetic heating device 200 comprises a coil, and by passing high-frequency alternating current into the coil, the coil can generate an outwardly radiating high-frequency alternating magnetic field. The inner drum 100 is at least partially made of a metal material that can generate eddy current in a high-frequency alternating magnetic field. When it is necessary to heat the washing water, the electromagnetic heating device 200 is turned on to radiate the high-frequency alternating magnetic field outwardly. At this time, the inner drum 100 can be excited to generate eddy current and self-heat, and then the generated heat is transmitted to the washing water in the drum to realize the washing water heating function.

[0050] However, since the inner drum 100 directly heats under the action of the electromagnetic heating device 200, when the clothes in the drum directly contact the inner wall of the inner drum 100, especially when the clothes cover a large area of the inner wall of the inner drum 100, the temperature of the inner wall of the inner drum 100 may be too high, causing the clothes to be scalded.

[0051] Embodiment one

[0052] This embodiment addresses the problem of scalding clothes in drum washing machines that use electromagnetic heating.

[0053] Specifically, such as Figures 1 to 3 As shown, this embodiment provides an inner drum assembly for the aforementioned drum washing machine, including an inner drum 100 and a partition 140 disposed inside the inner drum 100. The inner drum 100 has a drum wall 110 and a drum bottom 120.

[0054] The inner cylinder 100 has an inner wall 110 with staggered heating regions M and non-heating regions N. The heating regions M are used to generate heat under the excitation of an alternating magnetic field. The partition 140 is used to divide the interior of the inner cylinder 100 into a heating chamber 161 and a washing chamber 162. The heating regions M of the inner wall 110 constitute part of the cavity wall of the heating chamber 161, and the non-heating regions N constitute part of the cavity wall of the washing chamber 162. The partition 140 serves as a shared cavity wall for the heating chamber 161 and the washing chamber 162.

[0055] The drum washing machine of this embodiment includes the inner drum assembly described above, and also includes an electromagnetic heating device 200 disposed on the outside of the inner drum 100. The electromagnetic heating device 200 generates an alternating magnetic field that radiates outward, and the alternating magnetic field forms a radiation area on the drum wall 110 of the inner drum 100, the radiation area being located inside the heating area M of the drum wall 110.

[0056] In the above scheme, the heating area M of the drum wall 110 is made of a metallic material that can be excited by an eddy current effect by an alternating magnetic field. When the electromagnetic heating device 200 radiates an alternating magnetic field to the outer periphery, the radiation area of ​​the alternating magnetic field falls entirely within the heated area M on the drum wall 110. That is to say, only the heated area M on the drum wall 110 will be excited by an eddy current effect and generate heat under the action of the electromagnetic heating device 200, thereby heating the water in the heating chamber 161. The clearance area N of the drum wall 110 will not be heated by the electromagnetic heating device 200. The water in the washing chamber 162 is indirectly heated by circulating with the heating chamber 161 or by heat transfer through the partition 140. When clothes are placed in the washing chamber 162 for washing, they are blocked by the partition 140 and will not come into contact with the heated area M, which can prevent the clothes from being scalded by the drum wall 110 and protect the clothes.

[0057] In a further embodiment, the heating area M and the non-heating area N of the cylinder wall 110 are staggered along the axial direction of the inner cylinder 100, wherein the heating area M is located on the cylinder wall 110 in the area near the bottom of the cylinder 120.

[0058] With the above structure, when the partition 140 is arranged in the inner drum 100, the washing cavity 162 and the heating cavity 161 can be formed in the inner drum 100. That is, the washing cavity 162 directly communicates with the drum opening of the inner drum 100, and the heating cavity 161 is arranged in the rear region of the inner drum 100, and the user can still take and place the laundry through the drum opening of the inner drum 100.

[0059] Correspondingly, in the embodiment, the electromagnetic heating device 200 is arranged close to the drum bottom 120 of the inner drum 100, so that the radiation area of the alternating magnetic field on the drum wall 110 falls within the heating region M.

[0060] Meanwhile, since the axis of the inner drum 100 is arranged in a horizontal or close-to-horizontal direction, the washing water in the inner drum 100 is concentrated in the lower region of the inner drum 100. For the case where the washing cavity 162 and the heating cavity 161 are distributed in front and back, especially in the case where the water level in the inner drum 100 is low, the portion of the partition 140 below the liquid surface is very small, and the heating efficiency of the washing water in the washing cavity 162 through the heat transfer of the partition 140 is very limited.

[0061] Therefore, in the embodiment, the partition 140 is provided with a water-permeable structure which communicates the heating cavity 161 and the washing cavity 162. With the rotation of the inner drum 100 during the operation of the drum washing machine, the heated water in the heating cavity 161 can flow into the washing cavity 162 through the water-permeable structure, so that the water in the washing cavity 162 can also flow into the heating cavity 161 to be heated, so that the water in the washing cavity 162 can be quickly heated. The water-permeable structure is arranged to allow only water to flow through, and the laundry cannot enter the heating cavity 161 through the water-permeable structure, avoiding the problem that the laundry is scalded by contacting the heating region M.

[0062] In the specific scheme of the embodiment, the partition 140 is a partition plate 141 parallel to the drum bottom 120, and the water-permeable structure is a water-permeable hole 150 opened in the partition plate 141. The outer periphery of the partition plate 141 is connected to the inner surface of the drum wall 110, and the outer periphery of the partition plate 141 is connected to the drum wall 110 at the junction of the heating region M and the non-heating region N.

[0063] Further, the drum wall 110 of the inner drum 100 is of an integral structure and is made of a metal material that can be excited by an alternating magnetic field. The partition plate 141 as the partition 140 is also made of a metal material and is welded to the inner surface of the inner drum 100. Specifically, in the embodiment, the outer periphery of the partition plate 141 is welded to the inner surface of the drum wall 110.

[0064] In the above scheme, the flat partition plate 141 is used to divide the inner cylinder 100 into the front and rear distributed washing cavity 162 and heating cavity 161, which is simple in structure and easy to process. The partition plate 141 is welded with the cylinder wall 110 of the inner cylinder 100 to be integrated, which is firm and reliable in connection.

[0065] Meanwhile, the electromagnetic heating device 200 radiates an alternating magnetic field to the outer periphery, and the heating area M of the cylinder wall 110 is excited to have eddy current effect by cutting the magnetic induction lines of the alternating magnetic field, so that the direction of the magnetic induction lines of the alternating magnetic field is close to the direction perpendicular to the cylinder wall 110. The partition plate 141 is arranged parallel to the cylinder bottom 120, that is, perpendicular to the cylinder wall 110, and further parallel to the surface through which most of the magnetic induction lines pass. In this way, although the partition plate 141 is also made of metal material, it will not basically have self-heating phenomenon when the electromagnetic heating device 200 works, and it is not necessary to strictly control the distance between the electromagnetic heating device 200 and the cylinder wall 110 to prevent the partition plate 141 from being heated. In this way, only the heating area M of the cylinder wall 110 will be excited by the electromagnetic heating device 200 to self-heat, and the washing cavity 162 cavity wall directly contacted by the clothes, including the non-heating area N of the partition plate 141 and the cylinder wall 110, will not self-heat, which can effectively prevent the clothes from being scalded.

[0066] Further, in the embodiment, the water permeable holes 150 are arranged on the partition plate 141 close to the outer periphery, and a plurality of water permeable holes 150 are arranged at intervals in the circumferential direction. The plurality of water permeable holes 150 are arranged in the circumferential direction of the inner cylinder 100, which can ensure that part of the water permeable holes 150 are located in the lower area of the inner cylinder 100 during the rotation of the inner cylinder 100. At the same time, the water permeable holes 150 are arranged close to the outer periphery of the partition plate 141, which can ensure that part of the water permeable holes 150 are below the liquid level even at a low water level, so that the water flow exchange between the washing cavity 162 and the heating cavity 161 can be realized through the water permeable holes 150.

[0067] Specifically, the minimum distance between the outer periphery of the water permeable hole 150 and the outer periphery of the partition plate 141 is less than the lowest water level height in the inner cylinder 100. Preferably, the distance between the position where the outer periphery of the water permeable hole 150 is closest to the central axis of the inner cylinder 100 and the outer periphery of the partition plate 141 is less than the lowest water level height in the inner cylinder 100. In this way, even if the lowest water level is used for washing, it can be ensured that at least one water permeable hole 150 is completely immersed in water, so that the water flow exchange between the heating cavity 161 and the washing cavity 162 can be realized.

[0068] In a further aspect of the embodiment, the upper surface of the electromagnetic heating device 200 facing the inner drum 100 is a circular arc surface coaxial with the drum wall 110. In order to ensure that the radiation area of the alternating magnetic field generated by the electromagnetic heating device 200 on the drum wall 110 falls within the heating area M, the width of the electromagnetic heating device 200 along the axial direction of the inner drum 100 is less than or equal to the extension length of the heating area M along the axial direction of the inner drum 100.

[0069] Specifically, the electromagnetic heating device 200 is fixed to other components (not shown in the figure) at a distance from the inner drum 100 drum wall 110, for example, fixed to the outer drum or the water collecting device outside the inner drum 100. The electromagnetic heating device 200 is arranged along the circumferential direction of the inner drum 100, and the upper surface of the electromagnetic heating device 200 facing the inner drum 100 drum wall 110 is arranged at a distance from the drum wall 110 and is a circular arc surface coaxial with the drum wall 110.

[0070] In the embodiment, in the case of a certain overall volume of the inner drum 100, in order to make the washing cavity 162 have a larger volume, the extension length of the heating area M on the drum wall 110 along the axial direction of the inner drum 100 is substantially less than the extension length of the non-heating area N along the circumferential direction of the inner drum 100. Further, since it is necessary to ensure that the radiation area of the alternating magnetic field on the drum wall 110 does not exceed the range of the heating area M, the width of the electromagnetic heating device 200 along the axial direction of the inner drum 100 is limited. By arranging the electromagnetic heating device 200 to extend along the circumferential direction of the inner drum 100 for a certain length, the area of the radiation area can be increased under the premise of ensuring that the radiation area is located within the heating area M, thereby achieving higher heating efficiency.

[0071] By arranging the upper surface of the electromagnetic heating device 200 as a circular arc surface, the distance between the upper surface of the electromagnetic heating device 200 and the drum wall 110 can be kept consistent along the circumferential direction of the inner drum 100, ensuring that the drum wall 110 is uniformly heated in the radiation area of the alternating magnetic field.

[0072] The radiation area of the alternating magnetic field on the drum wall 110 is approximately the projection area of the electromagnetic heating device 200 on the inner drum 100 drum wall 110. By arranging the width of the electromagnetic heating device 200 along the axial direction of the inner drum 100 to be less than or equal to the extension length of the heating area M along the axial direction of the inner drum 100, it can be ensured that in the axial direction of the inner drum 100, the radiation area does not exceed the range of the heating area M, thereby ensuring that when the electromagnetic heating device 200 is working, the non-heating area N on the drum wall 110 which can be directly contacted by the clothes does not spontaneously heat up due to the excitation of the alternating magnetic field.

[0073] In detail, in this embodiment, the electromagnetic heating device 200 extends semi-circumferentially along the inner cylinder 100. When the electromagnetic heating device 200 is working, the lower half of the heating area M of the cylinder wall 110 can be heated simultaneously, ensuring high heating efficiency. In the axial direction of the inner cylinder 100, the side of the electromagnetic heating device 200 near the cylinder bottom 120 is flush with the plane where the cylinder bottom 120 is located, and the side away from the cylinder bottom 120 is located between the cylinder bottom 120 and the partition plate 141 in the axial direction of the inner cylinder 100.

[0074] In this embodiment, the drum washing machine includes an inner drum assembly with the above-described structure, and an electromagnetic heating device 200 disposed below the inner drum 100 and spaced apart from the drum wall 110. During the washing process, clothes are placed inside the inner drum 100, and the clothes are washed by water independently contained in the inner drum 100.

[0075] Specifically, the clothes are placed in the washing chamber 162 for washing. The drum washing machine can introduce water into the washing chamber 162 or the heating chamber 161 through the water inlet structure connected to the inner drum 100. The water flow can pass through the water permeable holes 150 on the partition plate 141, thereby realizing the simultaneous water intake of the washing chamber 162 and the heating chamber 161.

[0076] When the washing water in the inner drum 100 needs to be heated, the electromagnetic heating device 200 is turned on, and a high-frequency alternating current is passed through its coil, thereby generating a high-frequency alternating magnetic field that radiates outwards. This high-frequency alternating magnetic field radiates onto the drum wall 110 of the inner drum 100, forming a radiation area. This radiation area falls into the heating area M of the drum wall 110, causing the heating area M to be excited to generate eddy currents, achieving self-heating. The generated heat can then be transferred to the water in the heating chamber 161. The heated water in the heating chamber 161 can circulate with the water in the washing chamber 162 through the water permeable hole 150, thus raising the temperature of the water in the washing chamber 162.

[0077] During the heating process, the inner drum 100 can rotate according to a set program, which can accelerate the water exchange between the heating chamber 161 and the washing chamber 162, thereby achieving higher heating efficiency. When the clothes are tumbled in the inner drum 100, they are blocked by the partition plate 141 and will not come into contact with the heating area M of the drum wall 110, effectively avoiding the problem of clothes being scalded by the drum wall 110 during the washing process.

[0078] Example 2

[0079] like Figures 4 to 6 As shown, the difference between this embodiment and the first embodiment above is that the partition 140 is no longer a flat plate structure.

[0080] Specifically, in the embodiment, the partition 140 comprises a first extending portion 142 and a second extending portion 143. The first extending portion 142 is connected to the inner surface of the drum wall 110 at the joint of the heating region M and the non-heating region N, and extends to the central axis of the inner drum 100. The second extending portion 143 extends from the extending end of the first extending portion 142 to the direction of the drum bottom 120, and the extending end thereof is connected to the inner surface of the drum bottom 120.

[0081] Through the above structure, the partition 140, the heating region M of the drum wall 110, and the outer peripheral region of the drum bottom 120 jointly enclose the heating cavity 161.

[0082] Specifically, in the embodiment, the washing cavity 162 comprises a front section and a rear section along the axial direction of the inner drum 100. The front section of the washing cavity 162 extends from the drum opening of the inner drum 100 to the joint of the heating region M and the non-heating region N, and the rear section extends from the joint of the heating region M and the non-heating region N to the drum bottom 120. The inner diameter of the washing cavity 162 is greater in the front section than in the rear section. The heating cavity 161 is arranged around the outside of the rear section of the washing cavity 162 in the region close to the drum bottom 120.

[0083] In the above scheme, the heating cavity 161 is an annular cavity, and the washing cavity 162 can extend from the drum opening to the drum bottom 120 along the axial direction of the inner drum 100. Compared with the above embodiment I, the size of the washing cavity 162 along the axial direction of the inner drum 100 can be increased while the overall size of the inner drum 100 remains unchanged.

[0084] When the volume of the heating cavity 161 is controlled to remain unchanged compared with the above embodiment I, the size of the heating cavity 161 along the axial direction of the inner drum 100 is also greater, i.e., the heating region M can have a greater extension length along the axial direction of the inner drum 100, and the heating region M can have a greater area, which is beneficial to improving the heating efficiency. If the size of the heating region M remains unchanged compared with the above embodiment I, the volume of the washing cavity 162 can be increased, and thus the drum washing machine has a greater washing capacity.

[0085] In a further scheme of the embodiment, the first extending portion 142 extends obliquely to the central axis of the inner drum 100 and gradually approaches the drum bottom 120. Preferably, the second extending portion 143 extends to be connected to the drum bottom 120 in a direction parallel to the central axis of the inner drum 100.

[0086] In the above scheme, the inner diameter of the rear section of the washing cavity 162 gradually decreases in the direction close to the barrel bottom 120, and then remains unchanged. In this way, the heating cavity 161 can be formed around the rear section of the washing cavity 162, and an obtuse angle bend can be formed at the connection between the first extension 142 and the second extension 143, which is beneficial to the structural stability of the partition 140 and can reduce the damage caused by the inner wall of the washing cavity 162 to the clothes at the connection between the first extension 142 and the second extension 143.

[0087] Preferably, the first extension 142 and the second extension 143 have a fillet transition at the connection, which further avoids damage to the clothes in the washing cavity 162 caused by scratching.

[0088] In this embodiment, the partition 140 is also welded to the inner barrel 100. Specifically, the front end of the first extension 142 is welded to the inner surface of the barrel wall 110, and the extension end of the second extension 143 is welded to the inner surface of the barrel bottom 120.

[0089] In a further scheme of this embodiment, the water-permeable structure provided on the partition 140 is a water-permeable hole 150 provided on the first extension 142. Since the first extension 142 is closer to the barrel wall 110 of the inner barrel 100 than the second extension 143, when the water level in the inner barrel 100 is low, at least part of the first extension 142 can be submerged even if the liquid level does not reach the height of the second extension 143. By arranging the water-permeable hole 150 on the first extension 142, water flow communication between the heating cavity 161 and the washing cavity 162 can be achieved at a low water level.

[0090] With the above structure, when the drum washing machine only supplies water to one of the heating cavity 161 and the washing cavity 162, water flow can pass through the water-permeable hole 150 to enter the other cavity at a very low water level.

[0091] Further, the water-permeable hole 150 is arranged in multiple circumferential intervals on the first extension 142, so that during rotation of the inner barrel 100, part of the water-permeable hole 150 is always located in the lower region of the inner barrel 100, i.e., below the liquid level, ensuring water flow communication between the washing cavity 162 and the heating cavity 161 through the water-permeable hole 150.

[0092] Preferably, the water-permeable hole 150 is arranged in one circumferential interval and at least two axial intervals.

[0093] In detail, in this embodiment, two circumferential intervals of water-permeable holes 150 are arranged on the first extension 142, and the two circumferential intervals of water-permeable holes 150 are arranged one by one in correspondence with the circumferential direction of the inner barrel 100.

[0094] In the preferred embodiment of the present application, the second extending portion 143 of the partition 140 is a cylindrical surface structure coaxial with the cylinder wall 110, and the distance between the second extending portion 143 and the cylinder wall 110 is less than the lowest water level in the inner cylinder 100. When the lowest water level washing is used, the lower part of the second extending portion 143 can be immersed in the washing water.

[0095] With the above structure, when the electromagnetic heating device 200 is working to heat the water in the heating cavity 161, the heated water directly contacts the lower area of the second extending portion 143, so that the second extending portion 143 is heated by the water. Then, the second extending portion 143 can further transfer heat to the water in the washing cavity 162 above it. In this way, in addition to the water flow exchange between the heating cavity 161 and the washing cavity 162 through the water permeable hole 150, the water in the washing cavity 162 can also be indirectly heated by the heat conduction of the second extending portion 143. Although the second extending portion 143 can be heated by heat conduction, the temperature is significantly lower than the heating area M of the cylinder wall 110 excited to self-heating by the electromagnetic heating device 200, so that the clothes in the washing cavity 162 can contact the second extending portion 143 without the risk of being scalded.

[0096] In the present application, the electromagnetic heating device 200 radiates an alternating magnetic field upward, and the partition 140 arranged inside the inner cylinder 100 is located in the space directly above the electromagnetic heating device 200. When the partition 140 is made of metal material, it is necessary to control the partition 140 so as not to be excited by the alternating magnetic field generated by the electromagnetic heating device 200. To this end, the present application further adopts the following scheme.

[0097] The electromagnetic heating device 200 in the present application has an excitation distance threshold L0. The excitation distance threshold L0 refers to that when the interval distance between the metal material that can be excited by the alternating magnetic field and the electromagnetic heating device 200 is less than or equal to L0, the metal material can be excited to generate eddy current effect to heat; but if the interval distance between the metal material and the electromagnetic heating device 200 is greater than L0, the alternating magnetic field cannot excite the metal material to generate eddy current effect of sufficient strength to heat.

[0098] Specifically, the alternating magnetic field generated by the electromagnetic heating device 200 has a higher strength in the area close to the electromagnetic heating device 200, and the farther the distance from the electromagnetic heating device 200, the lower the strength of the alternating magnetic field, and the lower the strength of the excited eddy current. When the distance exceeds the excitation distance threshold L0, the strength of the eddy current excited by the alternating magnetic field at this position decreases sharply, which is not enough to make the excited material self-heat.

[0099] In the embodiment, the interval distance L1 between the outer surface of the heating area M and the upper surface of the electromagnetic heating device 200 needs to be set to be less than or equal to the excitation distance threshold L0, so that the heating area M is excited to self-heat by the electromagnetic heating device 200. In order to avoid the second extension part 143 being excited to self-heat, the interval distance L2 between the outer peripheral surface of the second extension part 143 and the upper surface of the electromagnetic heating device 200 needs to be set to be greater than the excitation distance threshold L0.

[0100] The above structure can be realized by adjusting the installation position of the electromagnetic heating device 200. In this way, the heating area M of the inner cylinder wall 110 is located within the action range of the electromagnetic heating device 200 and can be excited by the alternating magnetic field to self-heat through the eddy current effect. The interval distance between the second extension part 143 inside the heating area M and the upper surface of the electromagnetic heating device 200 is far enough to be excited to generate the self-heating phenomenon. In this way, the second extension part 143 in direct contact with the clothes will not scald the clothes due to excessively high temperature.

[0101] In the preferred embodiment of the present embodiment, the interval distance L3 between the inner surface of the heating area M and the upper surface of the electromagnetic heating device 200 is just equal to the excitation distance threshold L0 by adjusting the installation position of the electromagnetic heating device 200. In this way, the heating area M is completely located within the action range of the electromagnetic heating device 200 and can self-heat when the electromagnetic heating device 200 works to heat the water in the heating cavity 161. The first extension part 142 and the second extension part 143 of the partition part 140 are both located outside the action range of the electromagnetic heating device 200 and will not heat due to the excitation of the electromagnetic heating device 200. The clothes can directly contact the first extension part 142 and the second extension part 143 without being scalded.

[0102] In the embodiment, the partition part 140 composed of the first extension part 142 and the second extension part 143 can form the annular heating cavity 161 at one end of the inner cylinder 100 close to the cylinder bottom 120, and correspondingly, the washing cavity 162 can extend along the axis of the inner cylinder 100 from the cylinder opening to the cylinder bottom 120. On the one hand, in the case of a certain size of the inner cylinder 100, the size of the washing cavity 162 along the axis of the inner cylinder 100 can be increased to ensure that the drum washing machine has a larger washing capacity. On the other hand, the second extension part 143 is partially immersed in water, and the second extension part 143 can also heat the water in the washing cavity 162 through the heat transfer effect of the second extension part 143, which is conducive to improving the heating efficiency.

[0103] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above-mentioned technical content with the prompt as equivalent embodiments of equivalent changes without departing from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not depart from the technical solution of the present application, still belongs to the scope of the present application.

Claims

1. An inner cylinder assembly, characterized in that, include: The inner cylinder has a cylinder wall and a cylinder bottom. The cylinder wall has heating areas and non-heating areas that are staggered along the axial direction of the inner cylinder. The heating areas are located on the cylinder wall near the cylinder bottom and are used to generate heat under the excitation of an alternating magnetic field. A partition is provided inside the inner cylinder to divide the interior of the inner cylinder into a heating chamber and a washing chamber. The washing chamber is connected to the opening of the inner cylinder. A water-permeable structure is provided on the partition to connect the heating chamber and the washing chamber. The heated area of ​​the cylinder wall constitutes part of the wall of the heating chamber, and the non-heated area constitutes part of the wall of the washing chamber. The partition includes: The first extension is connected to the inner surface of the cylinder wall at the junction of the heated area and the non-heated area, and extends toward the central axis of the inner cylinder. The second extension extends from the end of the first extension toward the bottom of the cylinder, and its end is connected to the inner surface of the bottom of the cylinder. The partition, the heating area of ​​the cylinder wall, and the outer peripheral area of ​​the cylinder bottom together form the heating cavity.

2. The inner cylinder assembly according to claim 1, characterized in that, The first extension extends obliquely toward the central axis of the inner cylinder, gradually approaching the bottom of the cylinder.

3. The inner cylinder assembly according to claim 2, characterized in that, The second extension extends in a direction parallel to the central axis of the inner cylinder until it connects with the bottom of the cylinder.

4. The inner cylinder assembly according to claim 2, characterized in that, The first extension and the second extension have a rounded corner transition at the connection point.

5. The inner cylinder assembly according to any one of claims 1-4, characterized in that, The permeable structure is a permeable hole formed on the first extension.

6. The inner cylinder assembly according to claim 5, characterized in that, Multiple permeable holes are arranged at intervals along the circumference on the first extension.

7. The inner cylinder assembly according to claim 6, characterized in that, The permeable holes are arranged circumferentially at intervals around the perimeter, and at least two circles are arranged axially.

8. The inner cylinder assembly according to claim 5, characterized in that, The second extension is a cylindrical surface structure coaxial with the cylinder wall, and the distance between the second extension and the cylinder wall is less than the lowest water level in the inner cylinder.

9. The inner cylinder assembly according to any one of claims 1-4, characterized in that, The partition is welded to the inner surface of the inner cylinder.

10. The inner cylinder assembly according to claim 5, characterized in that, The partition is welded to the inner surface of the inner cylinder.

11. A drum washing machine, characterized in that, The inner cylinder assembly includes any one of claims 1-10, and further includes an electromagnetic heating device disposed on the outside of the inner cylinder; The electromagnetic heating device generates an alternating magnetic field that radiates outwards. The alternating magnetic field forms a radiation area on the inner cylinder wall, and the radiation area is located inside the heating area of ​​the cylinder wall.

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