A drum washing machine

Abstract

The present invention belongs to the technical field of washing machines and discloses a drum washing machine comprising an outer drum and an inner drum, wherein the inner drum is arranged inside the outer drum and can independently hold washing water during washing; an electromagnetic heating module for heating the inner drum is arranged inside the outer drum, wherein the outer drum comprises a side wall and a bottom wall, wherein the side wall has a mounting groove extending along the axis of the outer drum; one end of the mounting groove extends to the bottom wall of the outer drum, and the bottom wall has a mounting opening corresponding to the end of the mounting groove; the electromagnetic heating module is installed in the mounting groove through the mounting opening. By providing the electromagnetic heating module, the present invention achieves heating of the washing water in the inner drum when there is no water between the inner and outer drums. The electromagnetic heating module is installed in the mounting groove through the mounting opening provided on the bottom wall of the outer drum, which is simple to assemble and easy to implement.

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] However, since there's no water between the inner and outer drums during the wash cycle, heating the wash water using a heating tube installed in the outer drum, as is the case with traditional washing machines, is not feasible. To address this issue in washing machines without dewatering holes in the inner drum, a solution has been proposed: installing an electromagnetic heating module in the outer drum. This module achieves contactless heating by stimulating eddy currents. By using a metal inner drum, the electromagnetic heating module heats the rotating inner drum itself, thereby heating the wash water. However, the challenge remains to assemble the electromagnetic heating module with the outer drum.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a drum washing machine with an electromagnetic heating module.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A drum washing machine comprises an outer drum and an inner drum, wherein the inner drum is arranged inside the outer drum and can independently hold washing water during washing; an electromagnetic heating module is arranged inside the outer drum for heating the inner drum; the outer drum comprises a side wall and a bottom wall, and the side wall has a mounting groove extending along the axis of the outer drum;

[0009] One end of the mounting groove extends to the bottom wall of the outer cylinder, and the bottom wall is provided with a mounting opening corresponding to the end of the mounting groove; the electromagnetic heating module is installed in the mounting groove through the mounting opening.

[0010] Furthermore, the electromagnetic heating module includes an electromagnetic heating coil and a plastic-encapsulated shell covering the electromagnetic heating coil, wherein the plastic-encapsulated shell extends along the axis of the outer cylinder to a certain length, one end of the plastic-encapsulated shell passes through the installation opening and extends into the installation groove, and the other end is located outside the installation opening;

[0011] The electromagnetic heating coil is connected to a wiring terminal, and the wiring terminal extends from an end portion of the plastic-encapsulated housing located outside the installation opening.

[0012] Furthermore, the plastic-sealed housing includes a housing body and a mounting seat, the housing body is disposed in the mounting groove, the mounting seat partially passes through the mounting opening, and the wiring terminal extends out from the mounting seat.

[0013] Furthermore, the mounting seat includes a plug-in portion plugged into the mounting opening, and the housing body is inserted into one end of the plug-in portion extending into the mounting opening;

[0014] A limiting boss is provided at the other end of the plug-in portion, and the limiting boss abuts against the bottom wall of the outer cylinder at the outer side of the installation opening.

[0015] Furthermore, a sealing member having an interference fit with the installation opening is provided on a side wall of the plug-in portion, and the plug-in portion is inserted into the installation opening, and the sealing member blocks the installation opening.

[0016] Furthermore, a bracket for supporting the electromagnetic heating module is provided in the installation slot, and the bracket is respectively connected to the inner wall of the installation slot and the portion of the plastic shell extending into the installation slot;

[0017] Preferably, both sides of the plastic-sealed shell have insertion slots extending along the axis of the outer cylinder, and the bracket is fixedly connected to the inner wall of the mounting slot and inserted into the insertion slot from the suspended end of the plastic-sealed shell;

[0018] Preferably, the bracket is made of plastic material.

[0019] Furthermore, the electromagnetic heating module further includes a support portion provided at the suspended end of the plastic-encapsulated shell, wherein the support portion extends from the suspended end of the plastic-encapsulated shell toward the inner wall of the mounting groove and is connected to the inner wall of the mounting groove;

[0020] Preferably, the support portion and the plastic package shell are integrally formed.

[0021] Furthermore, the electromagnetic heating module has an upper surface facing the inner cylinder, and the upper surface is an arc surface coaxial with the side wall of the inner cylinder.

[0022] Furthermore, a drainage port connected to the drainage structure of the drum washing machine is provided on the mounting groove.

[0023] Furthermore, the drain outlet is arranged on the bottom wall of the mounting groove below the suspended end of the electromagnetic heating module.

[0024] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0025] The drum washing machine of the present invention has a mounting opening on the bottom wall of the outer drum, and the electromagnetic heating module is installed in the mounting groove on the side wall of the outer drum through the mounting opening, so the assembly is simple and easy to implement.

[0026] The electromagnetic heating module of the present invention is provided with a mounting seat on the plastic-enclosed housing for mounting within the mounting opening. The wiring terminals extend from the mounting seat through the bottom wall of the outer drum, thereby connecting to the power supply line of the drum washing machine. A stopper boss is provided on the mounting seat to limit the position of the mounting seat in the mounting opening, ensuring more accurate installation. A seal with an interference fit within the mounting opening seals the opening, preventing water leakage.

[0027] In the present invention, by providing a bracket or a supporting portion, support is achieved for the portion of the electromagnetic heating module inserted into the mounting slot, so that the electromagnetic heating module is more stably installed in the mounting slot, and the suspended end of the electromagnetic heating module is prevented from falling.

[0028] In the present invention, the upper surface of the electromagnetic heating module is set as an arc surface coaxial with the side wall of the inner cylinder, so that the distance between each point on the upper surface of the electromagnetic heating module and the side wall of the inner cylinder is equal, thereby making the side wall of the inner cylinder heated evenly.

[0029] In the present invention, a drainage port is provided on the installation groove and communicated with the drainage structure of the drum washing machine, thereby preventing the occurrence of washing water residue in the installation groove.

[0030] 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

[0031] 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:

[0032] Figure 1 2 is a schematic structural diagram of a drum washing machine according to an embodiment of the present invention;

[0033] Figure 2 1 is a front view structural diagram of a drum washing machine according to an embodiment of the present invention;

[0034] Figure 3This invention Figure 2 Schematic diagram of the middle AA surface;

[0035] Figure 4 is a structural schematic diagram of an electromagnetic heating module in an embodiment of the present invention;

[0036] Figure 5 is an exploded view of a drum washing machine according to an embodiment of the present invention;

[0037] Figure 6 1 is a schematic side view of the drum washing machine according to an embodiment of the present invention;

[0038] Figure 7 This invention Figure 6 Schematic diagram of the middle BB surface;

[0039] Figure 8 This invention Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0040] In the figure: 1. Inner tube; 2. Outer tube; 3. Power supply line; 11. Drain hole; 100. Electromagnetic heating module; 110. Shell body; 111. Heat dissipation hole; 112. Plug-in slot; 120. Mounting seat; 121. Plug-in part; 122. Limiting boss; 123. Sealing member; 130. Terminal block; 210. Side wall; 211. Mounting slot; 212. Bracket; 213. Limiting part; 220. Bottom wall; 221. Mounting opening.

[0041] 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

[0042] 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.

[0043] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "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.

[0044] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0045] Example 1

[0046] like Figures 1 to 3 As shown, this embodiment provides a drum washing machine, comprising an outer drum 2 and an inner drum 1. The inner drum 1 is arranged in the outer drum 2 and can independently hold washing water during washing.

[0047] In this embodiment, the inner drum 1 has no dehydration holes and remains closed during the wash cycle, allowing the wash water to be stored independently. A drainage hole 11 is provided on the inner drum wall. This hole is blocked by a sealing assembly during the wash cycle. When the inner drum 1 reaches a certain rotational speed, the sealing assembly, under the action of centrifugal force, opens the drainage hole 11, allowing the wash water to be discharged.

[0048] In one implementation of this embodiment, a lifting rib is installed on the wall of the inner drum 1 at a position corresponding to the drainage hole 11, a hole is opened on the outer shell of the lifting rib, and a centrifugal drainage structure is integrated inside the lifting rib. The initial state of the centrifugal drainage structure is a blocked state, keeping the inner drum 1 closed and independently holding the washing water. Under the action of centrifugal force, the centrifugal drainage structure can be opened so that the washing water can be discharged through the drainage hole 11.

[0049] Specifically, the centrifugal drainage structure includes a sealing plunger that can reciprocate and an elastic member for elastically resetting the sealing plunger. The sealing plunger can reciprocate to open or block the drainage hole 11. The sealing plunger is connected to a counterweight block through a lever. When the speed of the inner drum 1 reaches the drainage speed V 排 When the inner tube 1 rotates at a low speed or does not rotate, the elastic member pushes the sealing plunger to move away from the axis of the inner tube 1 to block the drainage hole 11, thereby achieving sealing of the inner tube 1.

[0050] In this embodiment, an electromagnetic heating module 100 is disposed within the outer tube 2 to heat the inner tube 1. The inner tube 1 is constructed of metal to generate eddy currents in response to the magnetic field generated by the electromagnetic heating module 100, thereby generating heat. The outer tube 2 is constructed of plastic, which does not generate eddy currents in the magnetic field.

[0051] The outer cylinder 2 includes a sidewall 210 and a bottom wall 220. The sidewall 210 has a mounting slot 211 extending along the axis of the outer cylinder 2. One end of the mounting slot 211 extends to the bottom wall 220 of the outer cylinder 2. The bottom wall 220 defines a mounting opening 221 corresponding to the end of the mounting slot 211. The electromagnetic heating module 100 is installed in the mounting slot 211 through the mounting opening 221.

[0052] In the above solution, the drum washing machine opens a mounting opening 221 on the bottom wall 220 of the outer drum 2, and the electromagnetic heating module 100 is installed in the mounting groove 211 on the side wall 210 of the outer drum 2 through the mounting opening 221. The assembly is simple and easy to implement.

[0053] In a further solution of this embodiment, the electromagnetic heating module 100 includes an electromagnetic heating coil and a plastic-encapsulated shell covering the electromagnetic heating coil. The plastic-encapsulated shell extends along the axis of the outer cylinder 2 to a certain length, one end passes through the installation opening 221 and extends into the installation groove 211, and the other end is located outside the installation opening 221.

[0054] The electromagnetic heating coil is connected to the connection terminal 130 , and the connection terminal 130 extends from the end of the plastic package housing located outside the installation opening 221 .

[0055] Furthermore, if Figures 2 to 4 As shown, the plastic shell includes a shell body 110 and a mounting seat 120. The shell body 110 is set in the mounting groove 211. The mounting seat 120 partially passes through the mounting opening 221. The connection terminal 130 passes through the mounting seat 120 and is connected to the power supply line 3 of the drum washing machine.

[0056] In the above scheme, the terminal 130 passes through the right end of the mounting seat 120 and extends to the outside of the mounting opening 221, and can then be connected to the power supply line 3 of the drum washing machine to power the electromagnetic heating module 100 and heat the inner drum 1.

[0057] The specific structure of the mounting base 120 in this embodiment is as follows Figure 4 The mounting seat 120 includes an inserting portion 121 that is plugged into the mounting opening 221 , and the housing body 110 is inserted into the inserting portion 121 and extends into one end of the mounting opening 221 .

[0058] A limiting boss 122 is provided at the other end of the plug-in portion 121 . The limiting boss 122 abuts against the bottom wall 220 of the outer tube 2 at the outer side of the mounting opening 221 .

[0059] In the above embodiment, the left end of the plug portion 121 is hollow, and the housing body 110 is inserted into the left end of the plug portion 121, thereby enclosing the electromagnetic heating coil within the plastic housing. A limiting boss 122 is provided at the right end of the plug portion 121. By abutting the limiting boss 122 against the bottom wall 220, the position of the mounting base 120 is limited, ensuring a more accurate installation position for the electromagnetic heating module 100.

[0060] In a further solution of this embodiment, a sealing member 123 having an interference fit with the installation opening 221 is provided on the side wall of the plug-in portion 121 . The plug-in portion 121 is inserted into the installation opening 221 , and the sealing member 123 blocks the installation opening 221 .

[0061] In the above solution, a sealing member 123 is provided around the right end of the plug-in portion 121. The sealing member 123 may be made of rubber and has an interference fit with the mounting opening 221. During the process of inserting the plug-in portion 121 into the mounting opening 221, the sealing member 123 around the plug-in portion 121 is also gradually inserted into the mounting opening 221. When the limiting boss 122 abuts against the bottom wall 220, the sealing member 123 completely enters the mounting opening 221. Since the sealing member 123 has an interference fit with the mounting opening 221, the sealing member 123 seals the mounting opening 221 after entering the mounting opening 221, thereby avoiding water leakage at the mounting opening 221 and the risk of water leakage and electric leakage.

[0062] In this embodiment, the electromagnetic heating module 100 can be assembled as an independent module in advance. The assembled electromagnetic heating module 100 can be directly inserted into the installation groove 211 through the installation opening 221, and then the wiring terminal 130 exposed on the outside of the installation opening 221 is connected to the power supply line 3 of the drum washing machine, thereby completing the assembly of the electromagnetic heating module 100 and the outer drum 2.

[0063] like Figures 4 to 8 As shown, in the preferred embodiment of this embodiment, a bracket 212 for supporting the electromagnetic heating module 100 is provided in the mounting groove 211, and the bracket 212 is respectively connected to the inner wall of the mounting groove 211 and the part of the plastic shell extending into the mounting groove 211, that is, the bracket 212 is connected to the shell body 110.

[0064] Specifically, both sides of the plastic-sealed shell, i.e., the left and right sides of the shell body 110, respectively have plug-in slots 112 extending along the axis of the outer cylinder 2. The bracket 212 is fixedly connected to the inner wall of the mounting slot 211 and is inserted into the plug-in slot 112 from the suspended end of the plastic-sealed shell.

[0065] Preferably, the bracket 212 is made of plastic material, so that the eddy current effect will not be excited in the magnetic field generated by the electromagnetic heating module 100 to cause heating.

[0066] More preferably, the bracket 212 is integrally formed with the side wall 210 of the outer cylinder 2 , and extends from the left and right inner walls of the installation groove 211 toward the interior of the installation groove 211 .

[0067] Furthermore, a limiting portion 213 is provided on the upper surface of the bracket 212 . When the bracket 212 is inserted into the insertion slot 112 , the limiting portion 213 abuts against two side surfaces of the electromagnetic heating module 100 .

[0068] In the above solution, the electromagnetic heating module 100 extends a long distance in the direction of the axis of the outer cylinder 2, and the electromagnetic heating module 100 itself is relatively heavy. The plug-in fit between the mounting base 120 and the mounting opening 221 alone cannot effectively provide stable support for the electromagnetic heating module 100. The left end of the electromagnetic heating module 100 is suspended in the air and may fall due to gravity, which could seriously damage the assembly structure between the mounting base 120 and the mounting opening 221. By providing a bracket 212 to support the portion of the electromagnetic heating module 100 that extends into the mounting slot 211, the electromagnetic heating module 100 can be more stably installed in the mounting slot 211.

[0069] In another preferred embodiment of the present invention, the electromagnetic heating module 100 further includes a support portion provided at the suspended end of the plastic package shell, the support portion extending from the suspended end of the plastic package shell toward the inner wall of the mounting groove 211 and connected to the inner wall of the mounting groove 211 .

[0070] Preferably, the support portion and the plastic package shell are integrally formed.

[0071] In the above scheme, the support portion also plays the role of supporting the suspended end of the electromagnetic heating module 100, ensuring the stability of the electromagnetic heating module 100 installed in the installation groove 211. The support portion is integrally formed with the shell body 110 of the plastic-sealed shell, and there is no need to separately set up parts to support the electromagnetic heating module, and the structure is simpler. When installing the electromagnetic heating module, the mounting seat 120 is inserted into the installation opening 221 from the outside of the bottom wall 220, and then the shell body 110 provided with the support portion is inserted into the plug-in portion 121 of the mounting seat 120 from the inside of the installation opening 221 to seal the electromagnetic heating coil. Finally, the cylinder wall and the cylinder bottom of the outer cylinder 2 are assembled together, and the assembly of the outer cylinder 2 and the electromagnetic heating module 100 is completed.

[0072] In a further solution of this embodiment, the electromagnetic heating module 100 has an upper surface facing the inner tube 1 , and the upper surface is an arc surface coaxial with the side wall of the inner tube 1 .

[0073] In this embodiment, the upper surface of the electromagnetic heating module 100 is set to an arc surface coaxial with the side wall of the inner drum 1, so that the distance between each point on the upper surface of the electromagnetic heating module 100 and the side wall of the inner drum 1 is equal, thereby making the side wall of the inner drum 1 heated evenly, thereby achieving uniform heating of the washing water.

[0074] In a further solution of this embodiment, a drainage port communicating with the drainage structure of the drum washing machine is provided on the mounting groove 211 .

[0075] A drainage trough connected to the drainage structure is provided on the side wall 210 of the outer tub 2 to collect wash water, making it easier to drain the wash water. In this embodiment, a drain outlet is provided on the mounting groove 211, allowing the mounting groove 211 to also serve as a drainage trough. This single structure simultaneously performs multiple functions, simplifying the structure of the outer tub 2.

[0076] Furthermore, the mounting groove 211 in this embodiment forms a groove structure on the side wall 210 of the outer tub 2. This allows wash water to easily collect in the mounting groove 211 after exiting the inner tub 1. This can easily leave undischarged wash water in the mounting groove 211 after exiting the outer tub 2. A drain port is provided on the mounting groove 211 to directly drain the wash water collected in the mounting groove 211, thus preventing the remaining wash water from remaining in the mounting groove 211.

[0077] Furthermore, the drain outlet is provided on the bottom wall of the mounting groove 211 below the suspended end of the electromagnetic heating module 100 .

[0078] In the above scheme, the drain outlet is set as far away from the installation port 221 as possible, avoiding the tendency of the washing water in the installation groove 211 to gather near the installation port 221, further reducing the risk of water leakage at the installation port 221, and thus avoiding leakage accidents caused by contact between the terminal 130 and the power supply line 3 and the washing water.

[0079] In this embodiment, an electromagnetic heating module 100 is arranged in the outer tube 2. The magnetic field generated by the electromagnetic heating module 100 causes an eddy current effect to be generated on the wall of the inner tube 1, thereby causing the wall of the inner tube to generate heat and heat the washing water. By providing a mounting port 221 at the bottom 220 of the outer tube 2, the electromagnetic heating module 100 can be directly inserted into the mounting groove 211 through the mounting port 221 as an independent module, which is simple to assemble. By designing the mounting seat 120 of the electromagnetic heating module 100, the installation position of the electromagnetic heating module 100 is made more accurate, and the sealing of the mounting port 221 is achieved by the sealing member 123. The setting of the bracket 212 supports the portion of the electromagnetic heating module 100 that extends into the mounting groove 211, thereby preventing the length and weight of the electromagnetic heating module 100 from affecting the stability of its installation, and at the same time preventing damage to the assembly structure at the mounting seat 120 and the mounting port 221.

[0080] Example 2

[0081] like Figure 1As shown, this embodiment provides a control method for the drum washing machine described in the first embodiment. Before the electromagnetic heating module 100 starts heating the inner drum, or during the process of the electromagnetic heating module 100 heating the inner drum, the inner drum 1 is controlled to drain water into the outer drum 2, so that the electromagnetic heating module 100 is at least partially immersed in water.

[0082] Specifically, in this embodiment, before the electromagnetic heating module 100 starts to heat the inner drum 1, or during the process of the electromagnetic heating module 100 heating the inner drum 1, the inner drum 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2.

[0083] In the above scheme, by controlling the inner drum 1 to drain water into the outer drum 2 to immerse at least a portion of the electromagnetic heating module 100, the electromagnetic heating module 100 can be in contact with the surrounding washing water for heat exchange, thereby achieving heat dissipation of the electromagnetic heating module 100. The heat dissipation effect is good, and malfunction due to overheating during the operation of the electromagnetic heating module is prevented.

[0084] In this embodiment, there are at least three methods for controlling the inner drum to start rotating to drain water:

[0085] Solution 1: After receiving the instruction to start the electromagnetic heating module 100, the drum washing machine controls the inner drum 1 to drain at a speed V 排 Rotate to drain water into the outer tube 2;

[0086] Preferably, the drum washing machine receives an instruction to start the electromagnetic heating module 100, and after a first preset time T1, controls the inner drum 1 to rotate and drain water into the outer drum 2;

[0087] More preferably, the drum washing machine determines the first preset time T1 according to a set washing water heating temperature.

[0088] Solution 2: The electromagnetic heating module 100 is provided with a first temperature sensor. When the temperature detected by the first temperature sensor is higher than a first preset temperature, the inner drum 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2;

[0089] Alternatively, a second temperature sensor is provided in the outer tub 2 for detecting the temperature between the inner tub 1 and the outer tub 2. When the temperature detected by the second temperature sensor is higher than a second preset temperature, the inner tub 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2;

[0090] Alternatively, a first temperature sensor and a second temperature sensor may be provided at the same time. When the temperature detected by any one of the temperature sensors is higher than the corresponding preset temperature, the inner drum 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2.

[0091] Solution 3: The drum washing machine has a washing water heating program. When receiving the instruction to run the washing water heating program, the drum washing machine controls the inner drum 1 to drain the water at a speed V during the washing process. 排 The drum 2 is rotated to drain water. After the water is filled, the drum washing machine is controlled to run according to the set washing program to wash;

[0092] Alternatively, after the drum washing machine has finished washing, it first controls the inner drum 1 to drain at a speed V 排 The outer drum 2 is rotated to drain water, and after the electromagnetic heating module 100 is at least partially immersed, the drum washing machine is controlled to perform washing according to the set washing program;

[0093] During the washing process, the drum washing machine controls the electromagnetic heating module 100 to start heating the inner drum 1 .

[0094] In the aforementioned solutions 1 and 2, after the electromagnetic heating module 100 begins heating, after a certain period of time or when the water reaches a certain temperature, the inner drum 1 is controlled to rotate to drain water into the outer drum 2, so that the electromagnetic heating module 100 is not immersed in the wash water during the early heating period. This ensures that the heating efficiency of the electromagnetic heating module 100 is not affected by the wash water during the early heating period, ensuring the wash water temperature rise rate in the early heating period and allowing the wash water to quickly reach the set temperature.

[0095] In the third solution, the inner drum 1 is controlled to rotate and drain water into the outer drum 2 during the water filling process before the start of washing or after the water filling is completed. This allows the electromagnetic heating module 100 to be immersed before washing clothes. Therefore, there is no need to pause the washing process to drain water into the outer drum 2 during the subsequent washing process. This avoids the situation where changing the rotation speed of the inner drum 1 during the washing process affects the washing effect of the clothes.

[0096] In order to control the drainage volume of the inner drum 1, in a further solution of this embodiment, the drum washing machine controls the inner drum 1 to drain at a speed V 排 The second preset rotation time T2 is continued to drain water. By controlling the rotation time of the inner drum 1, that is, controlling the drainage time, at a certain drainage speed V 排 The drainage rate of the lower drum washing machine remains substantially unchanged, so that the drainage volume of the inner drum 1 each time the electromagnetic heating module 100 is soaked can be controlled to be substantially the same.

[0097] In another solution of this embodiment, the drum washing machine is provided with a water level detection device for detecting the water level in the outer drum 2. When the water level detected by the water level detection device reaches a preset water level, the inner drum 1 is controlled to reduce its rotation speed.

[0098] In the above solution, the inner drum 1 can be controlled to stop draining by reducing its rotation speed until the centrifugal drainage structure blocks the drain hole 11, or by directly stopping the inner drum 1 from rotating. By providing a water level detection device to detect the water level in the outer drum 2 and control the inner drum 1 to stop draining, the amount of water discharged by the inner drum 1 remains consistent each time the electromagnetic heating module 100 is immersed in the outer drum for heat dissipation.

[0099] In this embodiment, the drain outlet on the mounting groove 211 is connected to the exterior of the drum washing machine via a drainage structure. To ensure that the electromagnetic heating module 100 can be submerged in wash water while heating the inner drum 1 to dissipate heat, the drainage structure is controlled to remain closed during the process of draining water from the inner drum 1 into the outer drum 2, disconnecting the drain outlet from the exterior of the drum washing machine. This allows the drained wash water to remain in the mounting groove 211 and submerge the electromagnetic heating device 100.

[0100] like Figure 1 As shown, this embodiment also provides a drum washing machine, which adopts the above-mentioned control method for a drum washing machine. The electromagnetic heating module 100 of the drum washing machine has a heat dissipation structure, and the heat dissipation of the electromagnetic heating module 100 can be achieved through the heat dissipation structure.

[0101] Furthermore, if Figure 3 and Figure 4 As shown, the heat dissipation structure includes heat dissipation holes 111 arranged on the upper surface of the electromagnetic heating module 100 .

[0102] Specifically, the plastic housing has an upper surface facing the inner cylinder 1 and a lower surface opposite the upper surface. A first opening is provided on the upper surface of the plastic housing, and a second opening is provided on the lower surface of the plastic housing corresponding to the first opening. The plastic housing extends from the first opening away from the inner cylinder 1 to the second opening, forming a heat dissipation hole 111 that penetrates the electromagnetic heating module 100.

[0103] By providing heat dissipation holes 111 that pass through the electromagnetic heating module 100 from top to bottom, the surface area of ​​the electromagnetic heating module 100 is increased. Combined with the heat dissipation method of controlling the inner drum 1 to drain water into the outer drum to immerse the electromagnetic heating module 100, the contact area between the electromagnetic heating module 100 and the surrounding air and washing water is increased, thereby further improving the heat dissipation efficiency.

[0104] In this embodiment, while the electromagnetic heating module 100 is heating the inner drum 1, the inner drum 1 is controlled to rotate to drain water into the outer drum, so that the electromagnetic heating module 100 is at least partially immersed in the wash water. The wash water that submerges the electromagnetic heating module 100 can be used to dissipate heat from the electromagnetic heating module 100, effectively preventing malfunctions due to overheating during operation. The electromagnetic heating module 100 is provided with heat dissipation holes 111 extending vertically therethrough, increasing the contact area between the electromagnetic heating module 100 and the surrounding air and wash water, further improving the heat dissipation efficiency of the electromagnetic heating module 100.

[0105] Example 3

[0106] like Figure 1 As shown, this embodiment provides a control method for the drum washing machine described in the first embodiment. During the process of the electromagnetic heating module 100 heating the inner drum, the drum washing machine determines whether the electromagnetic heating module 100 is in a dry-heating state based on the operating parameters of the electromagnetic heating module 100 and / or the environmental parameters surrounding the electromagnetic heating module 100.

[0107] In the above scheme, the drum washing machine can determine whether the electromagnetic heating module is in a dry-burning state based on the working parameters of the electromagnetic heating module and / or the environmental parameters around the electromagnetic heating module. The judgment on the occurrence of the dry-burning state is accurate and timely, and corresponding feedback can be made to prevent the electromagnetic heating module from dry-burning and damaging the clothes in the inner drum, or causing the electromagnetic heating module to overheat and malfunction due to dry-burning, or even cause safety hazards.

[0108] There are at least three methods for determining whether the electromagnetic heating module 100 of the drum washing machine is in a dry-heating state:

[0109] Solution 1: A first temperature sensor is provided on the electromagnetic heating module 100. When the electromagnetic heating module 100 heats the inner cylinder, if the temperature detected by the first temperature sensor is higher than a first set temperature, the electromagnetic heating module 100 is determined to be in a dry-burning state.

[0110] Option 2, the drum washing machine includes a second temperature sensor for detecting the temperature between the outer drum 2 and the inner drum 1. During the process of the electromagnetic heating module 100 heating the inner drum, if the temperature detected by the second temperature sensor is higher than the second set temperature, it is determined that the electromagnetic heating module 100 is in a dry-burning state.

[0111] In the third approach, while the electromagnetic heating module 100 is heating the inner drum 1, the drum washing machine monitors the output power of the electromagnetic heating module 100. When the output power P of the electromagnetic heating module 100 is greater than the set power P0, the electromagnetic heating module 100 is determined to be in a dry-heat state. Specifically, while the electromagnetic heating module 100 is heating the inner drum 1, the drum washing machine obtains the operating current I and voltage U of the electromagnetic heating module 100 in real time and calculates the output power P using the formula: output power P = I × U.

[0112] In the above three schemes, since the output power P can reflect the working status of the electromagnetic heating module 100 in real time, and it takes a certain amount of time for the temperature of the electromagnetic heating module 100 itself and its surroundings to change, the drum washing machine determines whether it is in a dry-burning state by monitoring the output power P of the electromagnetic heating module 100 during its operation. Compared with the judgment lag that may occur when temperature is used as the judgment standard, the detection of dry-burning conditions is more timely and accurate, reducing the occurrence of misjudgment.

[0113] When the drum washing machine determines that the electromagnetic heating module 100 is in a dry-burning state, the electromagnetic heating module 100 is controlled to stop heating to prevent the electromagnetic heating module 100 from continuing to heat and damaging the clothes in the inner drum, or causing damage to the electromagnetic heating module 100.

[0114] In a further solution of this embodiment, when it is determined that the electromagnetic heating module 100 is in the dry-burning state, the water inlet device of the drum washing machine is also controlled to feed water into the inner drum 1 .

[0115] When the water level in the inner drum 1 reaches a first preset water level H1, the water inlet device is controlled to stop inletting water.

[0116] In the above solution, while electromagnetic heating module 100 is controlled to stop heating, water is also injected into inner drum 1 through the water inlet device. Because the water inlet device is connected to the tap water supply, the water injected into inner drum 1 is at room temperature, which can quickly cool the high-temperature inner drum. If there are clothes in inner drum 1, the clothes can also be quickly cooled, preventing damage caused by prolonged exposure to high temperatures.

[0117] In the preferred embodiment of the present invention, when the water level in the inner drum 1 reaches the second preset water level H2, the electromagnetic heating module 100 is controlled to continue heating the inner drum. The setting of the second preset water level H2 satisfies:

[0118] In the above solution, when the water level in the inner drum reaches a certain height, the electromagnetic heating module 100 is automatically controlled to restart and continue to heat the inner drum 1. Subsequent programs can continue to run without user operation, thereby automatically eliminating the dry burning fault.

[0119] ​Preferably, after the electromagnetic heating module 100 is restarted, the drum washing machine continues to determine whether the electromagnetic heating module is in a dry-burning state based on the operating parameters of the electromagnetic heating module and / or the environmental parameters surrounding the electromagnetic heating module. If the electromagnetic heating module is determined to be in a dry-burning state, the electromagnetic heating module 100 is controlled to stop heating and the water inlet device is controlled to fill water into the inner drum 1.

[0120] When the number of times that the electromagnetic heating module is determined to be in the dry-burning state reaches a preset number N, the drum washing machine suspends operation and issues an alarm.

[0121] In a further embodiment of the present invention, after the water inlet device starts to fill the inner drum 1, if the inner drum 1 is in a stationary state, the inner drum 1 is controlled to rotate at a certain speed. By controlling the rotation of the inner drum 1, the water injected into the inner drum 1 flows within the inner drum 1, thereby accelerating the cooling efficiency of the inner drum 1.

[0122] Furthermore, in this embodiment, during the water inlet process, when the water level in the inner drum 1 reaches the third preset water level H2, the inner drum 1 is controlled to drain at a speed V 排 The water is drained into the outer tube 2 by rotating so that the electromagnetic heating module 100 is at least partially immersed in water.

[0123] In the above scheme, by controlling the inner tube 1 to drain water into the outer tube 2 to immerse at least a portion of the electromagnetic heating module 100, the electromagnetic heating module 100 is brought into contact with water for heat exchange, thereby achieving rapid cooling of the electromagnetic heating module 100 and preventing the electromagnetic heating module 100 from overheating for a long time and causing malfunction.

[0124] In this embodiment, when the electromagnetic heating module 100 of the drum washing machine is heating the inner drum 1, it can determine whether the electromagnetic heating module is in a dry-burn state based on the working parameters of the electromagnetic heating module and / or the environmental parameters around the electromagnetic heating module. When it is determined to be in a dry-burn state, the electromagnetic heating module 100 is controlled to stop heating. The occurrence of a dry-burn situation can be detected in a timely and accurate manner to prevent the electromagnetic heating module 100 from continuously drying and damaging clothes or causing malfunctions. When a dry-burn situation is determined to have occurred, water is also injected into the inner drum 1 to cool it down, and when the water level in the inner drum 1 reaches a certain height, the electromagnetic heating module 100 is restarted to continue heating. Subsequent programs can be automatically executed without user operation, with a high degree of automation.

[0125] 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 an outer drum and an inner drum, wherein the inner drum is arranged inside the outer drum and can independently hold washing water during washing; an electromagnetic heating module is arranged inside the outer drum for heating the inner drum, characterized in that: The outer cylinder comprises a side wall and a bottom wall, wherein the side wall has a mounting groove extending along the axis of the outer cylinder; One end of the mounting groove extends to the bottom wall of the outer cylinder, and the bottom wall is provided with a mounting opening corresponding to the end of the mounting groove; the electromagnetic heating module is installed in the mounting groove through the mounting opening; The electromagnetic heating module includes an electromagnetic heating coil and a plastic-sealed shell covering the electromagnetic heating coil, wherein the plastic-sealed shell extends along the axis of the outer cylinder to a certain length; a bracket for supporting the electromagnetic heating module is provided in the mounting groove; The bracket has a certain length along the extension direction of the mounting groove and is fixedly connected to the inner wall of the mounting groove; both sides of the plastic-sealed shell have plug-in slots extending along the axis of the outer cylinder, and the bracket is inserted into the plug-in slots from the suspended end of the plastic-sealed shell; The wall of the inner cylinder is made of metal material so as to generate eddy current effect to generate heat due to the magnetic field generated by the electromagnetic heating module; before the electromagnetic heating module starts to heat the inner cylinder, or during the process of the electromagnetic heating module heating the inner cylinder, the inner cylinder is controlled to drain water into the outer cylinder so that the electromagnetic heating module is at least partially immersed in water.

2. The drum washing machine according to claim 1, characterized in that: One end of the plastic-encapsulated housing extends through the mounting opening into the mounting groove, and the other end is located outside the mounting opening; The electromagnetic heating coil is connected to a wiring terminal, and the wiring terminal extends from an end portion of the plastic-encapsulated housing located outside the installation opening.

3. The drum washing machine according to claim 2, characterized in that: The plastic-sealed housing comprises a housing body and a mounting seat. The housing body is arranged in the mounting groove. The mounting seat partially passes through the mounting opening. The wiring terminal passes through the mounting seat.

4. The drum washing machine according to claim 3, characterized in that: The mounting seat includes a plug-in portion plugged into the mounting opening, and the housing body is inserted into one end of the plug-in portion extending into the mounting opening; A limiting boss is provided at the other end of the plug-in portion, and the limiting boss abuts against the bottom wall of the outer cylinder at the outer side of the installation opening.

5. The drum washing machine according to claim 4, characterized in that: A sealing member which is interference-fitted with the installation opening is provided on the side wall of the plug-in portion. The plug-in portion is inserted into the installation opening, and the sealing member blocks the installation opening.

6. The drum washing machine according to any one of claims 1 to 5, characterized in that: The bracket is made of plastic material.

7. The drum washing machine according to any one of claims 1 to 5, characterized in that: The electromagnetic heating module further includes a support portion provided at the suspended end of the plastic-encapsulated shell. The support portion extends from the suspended end of the plastic-encapsulated shell toward the inner wall of the mounting groove and is connected to the inner wall of the mounting groove.

8. The drum washing machine according to claim 7, characterized in that: The supporting portion and the plastic package shell are integrally formed.

9. The drum washing machine according to any one of claims 1 to 5, characterized in that: The electromagnetic heating module has an upper surface facing the inner cylinder, and the upper surface is an arc surface coaxial with the side wall of the inner cylinder.

10. The drum washing machine according to any one of claims 1 to 5, characterized in that: The mounting groove is provided with a drainage port which is communicated with the drainage structure of the drum washing machine.

11. The drum washing machine according to claim 10, characterized in that: The drain outlet is arranged on the bottom wall of the mounting groove below the suspended end of the electromagnetic heating module.

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