Control method of drum washing machine and drum washing machine

Abstract

The present invention belongs to the technical field of washing machines and discloses a control method for a drum washing machine and a drum washing machine. The drum washing machine includes 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 at the lower portion of the outer drum for heating the inner drum; before the electromagnetic heating module begins heating the inner drum, or while the electromagnetic heating module is heating the inner drum, water is controlled from the inner drum to be drained into the outer drum, so that the electromagnetic heating module is at least partially immersed in water. The drum washing machine of the present invention drains water into the outer drum to immerse at least a portion of the electromagnetic heating module, allowing the electromagnetic heating module to contact the surrounding washing water for heat exchange, thereby achieving heat dissipation of the electromagnetic heating module, achieving good heat dissipation effect, and preventing malfunction of the electromagnetic heating module due to overheating during operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing machines, and in particular relates to a control method for a drum washing machine and the 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 is no water between the inner and outer drums during the washing process, it is impossible to heat the washing water by installing a heating pipe in the outer drum as in traditional washing machines. In order to solve the problem of heating the washing water in washing machines without dehydration holes on the inner drum, Chinese patent application number 201811191414.1 discloses a drum washing machine, which includes a non-porous drum without dehydration holes installed in a shell, a clothing loading port provided on the side wall of the non-porous drum, and a door body on the drum that can be flipped to open and close the clothing loading port; an outer drum is mounted on the outside of the drum, and the outer drum is provided with an electromagnetic heating module to heat the interior of the outer drum and transfer the heating heat to the washing water in the drum.

[0005] However, in the above scheme, the temperature of the electromagnetic heating module itself is relatively high during heating, and the efficiency of heat exchange between the electromagnetic heating module and the air is relatively low. It is difficult to achieve effective heat dissipation by relying solely on the air flow around the electromagnetic heating module. Excessively high temperatures may cause the electromagnetic heating module to malfunction due to heat, affecting its use. On the other hand, since the electromagnetic heating module is arranged in the outer drum, the washing water discharged from the inner drum will submerge the electromagnetic heating device, and it is possible that the lint carried in the washing water will remain on the surface of the electromagnetic heating module. If the electromagnetic heating module cannot effectively dissipate heat, the excessively high temperature on the surface of the electromagnetic heating module may also cause the residual lint to burn, thereby causing greater safety hazards. Therefore, how to achieve effective heat dissipation of the electromagnetic heating module has become an urgent problem to be solved.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a control method and a drum washing machine. By draining water into the outer drum to immerse at least part of the electromagnetic heating module, the heat dissipation of the electromagnetic heating module is achieved using washing water.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A control method for a drum washing machine, the drum washing machine comprising an outer drum and an inner drum, the inner drum being arranged inside the outer drum and independently holding washing water during washing; an electromagnetic heating module being arranged at the lower portion of the outer drum for heating the inner drum;

[0010] 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.

[0011] Furthermore, a centrifugal drainage structure is provided on the inner cylinder, which can achieve a drainage speed V in the inner cylinder. 排 Open to drain water;

[0012] Before the electromagnetic heating module starts to heat the inner drum, or during the process of the electromagnetic heating module heating the inner drum, the inner drum is controlled to run at a drainage speed V 排 Turn to drain water into the outer drum.

[0013] Furthermore, after receiving the instruction to start the electromagnetic heating module, the drum washing machine controls the inner drum to drain at a speed V 排 Rotate to drain water into the outer cylinder;

[0014] Preferably, the drum washing machine receives an instruction to start the electromagnetic heating module, and after a first preset time T1, controls the inner drum to rotate and drain water into the outer drum;

[0015] More preferably, the drum washing machine determines the first preset time T1 according to a set washing water heating temperature.

[0016] Furthermore, a first temperature sensor is provided on the electromagnetic heating module. When the temperature detected by the first temperature sensor is higher than a first preset temperature, the inner drum is controlled to drain at a speed V 排 Rotate to drain water into the outer cylinder;

[0017] And / or, a second temperature sensor is provided in the outer drum for detecting the temperature between the inner drum and the outer drum, and when the temperature detected by the second temperature sensor is higher than a second preset temperature, the inner drum is controlled to drain at a speed V 排 Turn to drain water into the outer drum.

[0018] Furthermore, the drum washing machine has a washing water heating program. When receiving an instruction to run the washing water heating program, the drum washing machine controls the inner drum to run at a drainage speed V during or after the washing water is filled. 排 Turn to drain water into the outer drum.

[0019] Furthermore, the drum washing machine controls the inner drum to drain at a speed V 排 Continue to rotate for a second preset time T2 to drain water;

[0020] Alternatively, the drum washing machine is provided with a water level detection device for detecting the water level in the outer drum, and when the water level detected by the water level detection device reaches a preset water level, the inner drum is controlled to reduce its rotation speed.

[0021] Furthermore, a drain port is provided on the outer drum, and the drum washing machine further comprises a drain device connecting the drain port with the outside of the drum washing machine;

[0022] The drainage device is controlled to remain closed during the process of draining water from the inner drum to the outer drum, disconnecting the drainage port from the outside of the drum washing machine.

[0023] Another object of the present invention is to provide a drum washing machine comprising an outer drum and an inner drum, wherein the inner drum is disposed within the outer drum and has a washing chamber independently containing wash water; an electromagnetic heating module is disposed within the outer drum for heating the inner drum, and the electromagnetic heating module has a heat dissipation structure;

[0024] The drum washing machine preferably adopts the above-mentioned control method for the drum washing machine.

[0025] Furthermore, the electromagnetic heating module has an upper surface facing the inner cylinder, and the heat dissipation structure includes heat dissipation holes arranged on the upper surface.

[0026] Furthermore, the electromagnetic heating module includes an electromagnetic heating coil and a plastic-sealed shell covering the electromagnetic heating coil, wherein the plastic-sealed shell has an upper surface facing the inner cylinder and a lower surface opposite to the upper surface;

[0027] A first opening is provided on the upper surface of the plastic-sealed shell, and a second opening is provided on the lower surface of the plastic-sealed shell corresponding to the first opening. The plastic-sealed shell extends from the first opening to the second opening in a direction away from the inner cylinder to form a heat dissipation hole that passes through the electromagnetic heating module.

[0028] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0029] The drum washing machine of the present invention drains water into the outer drum to immerse at least a portion of the electromagnetic heating module, so that the electromagnetic heating module can contact the surrounding washing water for heat exchange, thereby realizing heat dissipation of the electromagnetic heating module, with good heat dissipation effect, and preventing the electromagnetic heating module from malfunctioning due to overheating during operation.

[0030] The drum washing machine of the present invention controls the electromagnetic heating module to start heating after receiving the instruction to start the electromagnetic heating module, and then controls the inner drum to rotate and drain water into the outer drum after a first preset time T1, or controls the inner drum to drain water into the outer drum by setting a temperature sensor. When the temperature of the electromagnetic heating module itself or its surroundings reaches a set value, the electromagnetic heating module can be immersed to dissipate heat, so that the electromagnetic heating module is not immersed in the early stage of heating, thereby avoiding affecting the heating efficiency of the washing water in the early stage of heating.

[0031] After receiving the instruction to run the washing water heating program, the drum washing machine of the present invention determines that the electromagnetic heating module needs to be started to heat the inner drum during the subsequent washing process. During the water filling process or after the water filling is completed, the inner drum is controlled to rotate to drain water into the outer drum, and the operation of immersing the electromagnetic heating module is completed before starting to wash clothes, so as to avoid changing the rotation speed of the inner drum during the washing process to affect the washing effect of the clothes.

[0032] The drum washing machine of the present invention further improves the heat dissipation efficiency of the electromagnetic heating module by providing a heat dissipation structure on the electromagnetic heating module, combined with a method of immersing the electromagnetic heating module in wash water to dissipate heat. The heat dissipation structure is provided as heat dissipation holes extending through the upper and lower surfaces of the electromagnetic heating module, increasing the contact area between the electromagnetic heating module and the surrounding air and wash water, further improving heat dissipation efficiency.

[0033] 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

[0034] 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:

[0035] Figure 1 2 is a schematic structural diagram of a drum washing machine according to an embodiment of the present invention;

[0036] Figure 2 This is a flow chart of a control method for a drum washing machine in Embodiment 1 of the present invention;

[0037] Figure 3is a flow chart of a control method for a drum washing machine in a second embodiment of the present invention;

[0038] Figure 4 This is a flow chart of a control method for a drum washing machine in the third embodiment of the present invention;

[0039] Figure 5 This is a flow chart of another control method for a drum washing machine in the third embodiment of the present invention;

[0040] Figure 6 1 is a front view schematic structural diagram of a drum washing machine in a fourth embodiment of the present invention;

[0041] Figure 7 This invention Figure 6 Schematic diagram of the middle AA surface;

[0042] Figure 8 Schematic diagram of the structure of the electromagnetic heating module in the fourth embodiment of the present invention;

[0043] Figure 9 is an exploded view of a drum washing machine in a fourth embodiment of the present invention;

[0044] Figure 10 1 is a schematic side structural diagram of a drum washing machine in a fourth embodiment of the present invention;

[0045] Figure 11 This invention Figure 10 Schematic diagram of the middle BB surface;

[0046] Figure 12 This invention Figure 11 Schematic diagram of the enlarged structure at point C in the middle.

[0047] 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.

[0048] 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

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Example 1

[0053] like Figure 1 As shown, the drum washing machine described in this embodiment includes 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.

[0054] In this embodiment, the inner drum 1 is not provided with a dehydration hole on its wall and is in a closed state during the washing process, so that washing water can be independently contained. A drainage hole 11 is provided on its wall and is blocked by a sealing assembly during the washing process.

[0055] There are several ways to drain the inner drum 1. In one approach, a push-open assembly is provided at a specific position on the outer drum 2, and the inner drum 1 is controlled to rotate to a position corresponding to the sealing assembly and the push-open assembly. The action of the push-open assembly releases the sealing assembly from blocking the drain hole 11, allowing the wash water to be discharged.

[0056] In another solution, a centrifugal assembly is provided in the inner drum 1. When the inner drum 1 reaches a certain rotation speed, the centrifugal assembly can move under the action of centrifugal force, thereby driving the sealing assembly to move, thereby opening the drain hole 11 and realizing the discharge of washing water.

[0057] In this embodiment, an electromagnetic heating module 100 is installed below the outer tube 2 to heat the inner tube 1. The inner tube 1 is constructed of metal, which generates eddy currents due 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. The electromagnetic heating module 100 is preferably located at the lowest point within the outer tube 2.

[0058] Before the electromagnetic heating module 100 starts to heat the inner cylinder, or during the process of the electromagnetic heating module 100 heating the inner cylinder, the inner cylinder 1 is controlled to drain water into the outer cylinder 2 so that the electromagnetic heating module 100 is at least partially immersed in water.

[0059] In the above scheme, by controlling the inner drum 1 to drain water into the outer drum 2, the discharged washing water gathers at the bottom of the outer drum 2, immersing at least part of the electromagnetic heating module 100, so that the electromagnetic heating module 100 can contact with the surrounding washing water for heat exchange, thereby realizing heat dissipation of the electromagnetic heating module 100, and the heat dissipation effect is good, preventing the electromagnetic heating module 100 from malfunctioning due to overheating during operation.

[0060] In this embodiment, a centrifugal drainage structure (not shown in the figure) is provided on the inner drum 1. The centrifugal drainage structure can achieve a drainage speed V in the inner drum. 排 When draining, open the drain hole 11 to drain.

[0061] 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.

[0062] Specifically, the centrifugal drainage structure includes a reciprocating sealing plunger and an elastic member for elastically returning the sealing plunger. The sealing plunger can reciprocate to open or close the drainage hole 11. The sealing plunger is connected to a counterweight block via a lever. When the rotational speed of the inner drum 1 reaches the drainage speed, the counterweight block moves away from the axis of the inner drum 1 under the action of centrifugal force, driving the sealing plunger to move toward the axis of the inner drum 1, opening the drainage hole 11. When the rotational speed of the inner drum 1 is low or not rotating, the elastic member pushes the sealing plunger away from the axis of the inner drum 1 to close the drainage hole 11, thereby sealing the inner drum 1.

[0063] 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 flow at a water flow rate V 排 Rotate to drain water into the outer tube 2.

[0064] In this embodiment, when 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 2 .

[0065] like Figure 1 and Figure 2 As shown, in a further solution of this embodiment, after the drum washing machine receives the instruction to start the electromagnetic heating module 100, it controls the inner drum 1 to drain at a speed V 排 Rotate to drain water into the outer tube 2.

[0066] Preferably, the drum washing machine receives an instruction to start the electromagnetic heating module 100 and controls the inner drum 1 to rotate and drain water into the outer drum 2 after a first preset time period T1.

[0067] More preferably, the drum washing machine determines the first preset time T1 according to a set washing water heating temperature.

[0068] In the above embodiment, after receiving the instruction to activate the electromagnetic heating module 100, the drum washing machine controls the electromagnetic heating module to start operating and heat the inner drum 1. Preferably, after a first preset time period T1, the inner drum is controlled to rotate and drain water into the outer drum, so that the electromagnetic heating module 100 is not immersed in the wash water during the early heating period. In this way, the heating efficiency of the electromagnetic heating module 100 is not affected by the immersion of the wash water during the early heating period, ensuring the temperature rise rate of the wash water during the early heating period, and allowing the wash water to quickly reach the set temperature.

[0069] Different wash water heating temperature settings result in different heating efficiencies of the electromagnetic heating module 100, and consequently, different times required to reach a higher temperature. In this embodiment, the drum washing machine determines the first preset time duration T1 based on the set wash water heating temperature. For different wash water heating temperature settings, the time interval between turning on the electromagnetic heating module 100 and controlling the inner drum 1 to rotate and drain water varies. This ensures that the temperature of the electromagnetic heating module 100 when submerged in wash water remains substantially the same at different wash water heating temperature settings.

[0070] In this embodiment, a mounting groove 211 is provided at the bottom of the outer tub 2, and the electromagnetic heating module 100 is mounted in the mounting groove 211. Due to the recessed structure of the mounting groove 211, water discharged from the inner tub 1 can be collected in the mounting groove 211, thereby achieving immersion of the electromagnetic heating module 100 with less wash water discharge.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] In this embodiment, a drain port is provided on the outer drum 2, and the drum washing machine further includes a drainage device connecting the drain port to the exterior of the drum washing machine. Preferably, the drain port is provided on the mounting groove 211, so that wash water collected in the mounting groove 211 can be directly drained through the drain port, thereby preventing wash water from remaining in the mounting groove 211 after drainage by the drainage device.

[0075] In order to ensure that the electromagnetic heating module 100 can be immersed in washing water to achieve heat dissipation during the process of heating the inner drum 1, the drainage device is controlled to remain closed during the process of draining water from the inner drum 1 into the outer drum 2, and the connection between the drain port and the outside of the drum washing machine is disconnected so that the discharged washing water can remain in the outer drum 2 to immerse the electromagnetic heating device 100.

[0076] 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, resulting in effective heat dissipation and preventing malfunctions due to overheating during operation of the electromagnetic heating module. After the electromagnetic heating module 100 begins heating, the inner drum 1 is controlled to drain water, ensuring heating efficiency in the early stages of heating and allowing the wash water to quickly reach the set temperature. By controlling the drainage time or providing a water level detection device, the amount of water discharged from the submerged electromagnetic heating module 100 can be controlled to avoid excessive drainage and waste of wash water.

[0077] Example 2

[0078] like Figure 1 and Figure 3 As shown, the difference between this embodiment and the above embodiment 1 is that: the electromagnetic heating module 100 is provided with a first temperature sensor, and when the temperature detected by the first temperature sensor is higher than the 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.

[0079] 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.

[0080] In this embodiment, a first temperature sensor and a second temperature sensor can 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.

[0081] In the above solution, a temperature sensor is provided to detect the temperature of the electromagnetic heating module 100 and its surroundings. When the detected temperature reaches a certain value, the inner drum 1 is controlled to rotate and drain water into the outer drum 2, ensuring 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. Furthermore, by directly controlling the draining of the inner drum 1 based on the temperature detection, the control of the point at which the inner drum 1 begins draining is more accurate.

[0082] Example 3

[0083] like Figure 1 As shown, the difference between this embodiment and the above embodiment 1 is that before the electromagnetic heating module 100 starts to heat 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.

[0084] Specifically, if Figure 1 and Figure 4 As shown, 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 washing machine is rotated to drain water into the outer drum 2. After the water is filled in, the drum washing machine is controlled to run the washing program according to the set washing program. During the washing program, the drum washing machine controls the electromagnetic heating module 100 to start heating the inner drum 1.

[0085] Or, as Figure 1 and Figure 5 As shown, when the drum washing machine receives the instruction to run the washing water heating program, after the washing water is completed, the inner drum 1 is controlled to drain at a speed V 排 The drum washing machine is controlled to run the washing program according to the set washing process. During the washing process, the drum washing machine controls the electromagnetic heating module 100 to start heating the inner drum 1.

[0086] In the above solution, after receiving a command to start a wash water heating program, the drum washing machine determines that electromagnetic heating module 100 needs to be activated to heat inner drum 1 during the subsequent wash cycle. During the water filling process before the wash begins or after the water filling is completed, inner drum 1 is controlled to rotate to drain water into outer drum 2. This allows the electromagnetic heating module 100 to be immersed before washing begins, eliminating the need to pause the wash cycle to drain water into outer drum 2 during the subsequent wash cycle. This avoids the situation where changing the rotation speed of inner drum 1 during the wash cycle could affect the washing effect.

[0087] Example 4

[0088] like Figure 1 As shown, this embodiment provides a drum washing machine, comprising an outer drum 2 and an inner drum 1. The inner drum 1 is disposed within the outer drum 2 and has a separate washing chamber for holding wash water. An electromagnetic heating module 100 is disposed within the outer drum 2 for heating the inner drum 1. The electromagnetic heating module 100 has a heat dissipation structure.

[0089] In a preferred solution of this embodiment, the drum washing machine adopts the control method of the drum washing machine described in any one of the above embodiments 1 to 3.

[0090] In this embodiment, the electromagnetic heating module 100 has a heat dissipation structure, which can dissipate heat from the electromagnetic heating module 100. Combined with the method of immersing the electromagnetic heating module 100 in wash water to dissipate heat, the heat dissipation efficiency of the electromagnetic heating module 100 is further improved, and overheating of the electromagnetic heating module 100 during operation is avoided.

[0091] In a further embodiment of the present invention, Figure 7 and Figure 8 As shown, the electromagnetic heating module 100 has an upper surface facing the inner cylinder 1 , and the heat dissipation structure includes heat dissipation holes 111 arranged on the upper surface.

[0092] In this embodiment, the electromagnetic heating module 100 is used to heat the inner cylinder 1. During the heating process, the temperature of the upper surface is higher. Providing heat dissipation holes 111 on the upper surface as a heat dissipation structure is conducive to achieving a better heat dissipation effect.

[0093] Furthermore, the electromagnetic heating module 100 includes an electromagnetic heating coil and a plastic-sealed shell covering the electromagnetic heating coil. The plastic-sealed shell has an upper surface facing the inner cylinder 1 and a lower surface opposite to the upper surface.

[0094] A first opening is provided on the upper surface of the plastic-sealed shell, and a second opening is provided on the lower surface of the plastic-sealed shell corresponding to the first opening. The plastic-sealed shell extends from the first opening to the second opening in a direction away from the inner cylinder 1 to form a heat dissipation hole 111 that passes through the electromagnetic heating module 100.

[0095] In the above solution, the vertically extending heat dissipation holes 111 increase the contact area between the electromagnetic heating module 100 and the surrounding air and wash water, further improving heat dissipation efficiency. The heat dissipation holes 111 extend from the first opening to the second opening of the plastic housing, ensuring that the electromagnetic heating coil is enclosed within the plastic housing.

[0096] In this embodiment, the electromagnetic heating module 100 has a heat dissipation structure. This, in conjunction with the control method for the drum washing machine, allows the electromagnetic heating module 100 with the heat dissipation structure to be immersed in the wash water during the heating of the inner drum 1, further improving the heat dissipation efficiency of the electromagnetic heating module 100. The heat dissipation structure is provided as heat dissipation holes 111 extending through the upper and lower surfaces of the electromagnetic heating module 100, increasing the contact area between the electromagnetic heating module 100 and the surrounding air and wash water, further improving the heat dissipation efficiency.

[0097] like Figures 6 to 8 As shown, in a further embodiment of this embodiment, the outer cylinder 2 includes a side wall 210 and a bottom wall 220. A mounting groove 211 is provided on the side wall 210 and extends a certain length along the axis of the outer cylinder 2. One end of the mounting groove 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 groove 211. The electromagnetic heating module 100 is installed in the mounting groove 211 through the mounting opening 221.

[0098] 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.

[0099] Furthermore, the plastic-encapsulated shell of the electromagnetic heating module 100 extends along the axis of the outer cylinder 2 to a certain length, with one end passing through the installation opening 221 and extending into the installation groove 211 , and the other end being located outside the installation opening 221 .

[0100] 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 .

[0101] Furthermore, the plastic-sealed 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.

[0102] 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.

[0103] In this embodiment, the heat dissipation holes 111 are provided on the housing body 110 and pass through the upper and lower surfaces of the housing body 110 .

[0104] The specific structure of the mounting base 120 in this embodiment is as follows Figure 8 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 .

[0105] 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 .

[0106] 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.

[0107] 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 .

[0108] 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.

[0109] 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.

[0110] like Figures 8 to 12 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.

[0111] 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.

[0112] 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.

[0113] 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 .

[0114] 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 .

[0115] 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.

[0116] 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 .

[0117] Preferably, the support portion and the plastic package shell are integrally formed.

[0118] 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.

[0119] In a further solution of this embodiment, the upper surface of the electromagnetic heating module 100 facing the inner tube 1 is an arc surface coaxial with the side wall of the inner tube 1 .

[0120] 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.

[0121] Preferably, the drain port on the mounting groove 211 is provided on the bottom wall of the mounting groove 211 below the free end of the electromagnetic heating module 100. The drain port is provided as far away from the mounting opening 221 as possible to prevent the washing water in the mounting groove 211 from collecting near the mounting opening 221, further reducing the risk of water leakage at the mounting opening 221, thereby preventing the connection terminal 130 and the power supply line 3 from coming into contact with the washing water and causing leakage accidents.

[0122] In this embodiment, by providing a mounting opening 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 opening 221 as an independent module, simplifying assembly. The design of the mounting seat 120 of the electromagnetic heating module 100 makes the installation position of the electromagnetic heating module 100 more accurate, and the sealing of the mounting opening 221 is achieved by the sealing member 123. The provision of the bracket 212 supports the suspended end of the electromagnetic heating module 100, preventing the length and weight of the electromagnetic heating module 100 from affecting its installation stability, while also preventing damage to the assembly structure at the mounting seat 120 and the mounting opening 221.

[0123] Example 5

[0124] like Figure 1As shown, this embodiment provides a control method for the drum washing machine described in the fourth 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.

[0125] 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.

[0126] 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:

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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 .

[0133] 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.

[0134] 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.

[0135] 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:

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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 control method for a drum washing machine, comprising an outer drum and an inner drum, wherein the inner drum is disposed within the outer drum and independently holds washing water during washing; an electromagnetic heating module is disposed below the outer drum for heating the inner drum; It is characterized by: The electromagnetic heating module includes an electromagnetic heating coil; 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; The bottom of the outer cylinder is provided with a recessed mounting groove, and the electromagnetic heating module is mounted in the mounting groove; The drum washing machine receives an instruction to start the electromagnetic heating module, and after a first preset time T1, controls the inner drum to drain water into the outer drum, so that the electromagnetic heating module is at least partially immersed in water.

2. The control method of the drum washing machine according to claim 1, characterized in that: The inner cylinder is provided with a centrifugal drainage structure, which can reach a drainage speed V in the inner cylinder. 排 Open to drain water; Before the electromagnetic heating module starts to heat the inner drum, or during the process of the electromagnetic heating module heating the inner drum, the inner drum is controlled to run at a drainage speed V 排 Turn to drain water into the outer drum.

3. The control method of the drum washing machine according to claim 1, characterized in that: The drum washing machine determines the first preset time T1 according to the set washing water heating temperature.

4. The control method of the drum washing machine according to claim 2, characterized in that: The electromagnetic heating module 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 is controlled to drain at a speed V 排 Rotate to drain water into the outer cylinder; And / or, a second temperature sensor is provided in the outer drum for detecting the temperature between the inner drum and the outer drum, and when the temperature detected by the second temperature sensor is higher than a second preset temperature, the inner drum is controlled to drain at a speed V 排 Turn to drain water into the outer drum.

5. The control method of the drum washing machine according to claim 2, characterized in that: The drum washing machine has a washing water heating program. When receiving an instruction to run the washing water heating program, the drum washing machine controls the inner drum to run at a drainage speed V during or after the washing water is filled. 排 Turn to drain water into the outer drum.

6. The control method of the drum washing machine according to claim 2, characterized in that: The drum washing machine controls the inner drum to drain at a speed V 排 Continue to rotate for a second preset time T2 to drain water; Alternatively, the drum washing machine is provided with a water level detection device for detecting the water level in the outer drum, and when the water level detected by the water level detection device reaches a preset water level, the inner drum is controlled to reduce its rotation speed.

7. The control method for a drum washing machine according to any one of claims 1 to 6, characterized in that: The outer drum is provided with a drain port, and the drum washing machine further comprises a drain device communicating with the drain port and the outside of the drum washing machine; The drainage device is controlled to remain closed during the process of draining water from the inner drum to the outer drum, disconnecting the drainage port from the outside of the drum washing machine.

8. A drum washing machine comprising an outer drum and an inner drum, wherein the inner drum is arranged inside the outer drum and has a washing chamber for independently holding washing water; an electromagnetic heating module for heating the inner drum is arranged inside the outer drum, characterized in that: The electromagnetic heating module has a heat dissipation structure; The drum washing machine adopts the control method of the drum washing machine according to any one of claims 1 to 7.

9. The drum washing machine according to claim 8, characterized in that: The electromagnetic heating module has an upper surface facing the inner cylinder, and the heat dissipation structure includes heat dissipation holes arranged on the upper surface.

10. The drum washing machine according to claim 9, characterized in that: The electromagnetic heating module includes an electromagnetic heating coil and a plastic-sealed shell covering the electromagnetic heating coil, wherein the plastic-sealed shell has an upper surface facing the inner cylinder and a lower surface opposite to the upper surface; A first opening is provided on the upper surface of the plastic-sealed shell, and a second opening is provided on the lower surface of the plastic-sealed shell corresponding to the first opening. The plastic-sealed shell extends from the first opening to the second opening in a direction away from the inner cylinder to form a heat dissipation hole that passes through the electromagnetic heating module.

Images