Control method of 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, wherein the drum washing machine includes an outer drum and an inner drum, the inner drum being arranged inside the outer drum and capable of independently holding washing water during washing; an electromagnetic heating module for heating the inner drum being arranged inside the outer drum; and during the process of the electromagnetic heating module heating the inner drum, the drum washing machine determines 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 surrounding the electromagnetic heating module. The drum washing machine of the present invention 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 surrounding the electromagnetic heating module, accurately and promptly making the determination on the occurrence of the dry-burning state, and then providing corresponding feedback, thereby preventing the electromagnetic heating module from dry-burning and damaging the clothes in the inner drum, or preventing the electromagnetic heating module from overheating and malfunctioning due to dry-burning, or even causing safety hazards.

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. 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 solution, there is no anti-dry-burn protection device set for the electromagnetic heating module. Once a dry-burn situation occurs, it may lead to a series of adverse consequences. In the dry-burn state, the temperature of the inner drum will rise rapidly under the action of the electromagnetic heating module, and its temperature will exceed the normal washing water heating temperature. When there are clothes in the inner drum, the excessively high temperature of the inner drum may damage the clothes. Correspondingly, the electromagnetic heating module itself will also overheat, and in severe cases, it may cause damage to the electromagnetic heating module. Dry-burning of the electromagnetic heating module may even cause accidents such as fire or explosion, seriously endangering the user's safety.

[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 deficiencies of the prior art and provide a control method for a drum washing machine that can prevent dry burning of an electromagnetic heating module.

[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 inside the outer drum for heating the inner drum;

[0010] During the process of the electromagnetic heating module heating the inner drum, the drum washing machine determines whether the electromagnetic heating module is in a dry-heating state based on the working parameters of the electromagnetic heating module and / or the environmental parameters around the electromagnetic heating module.

[0011] Furthermore, a first temperature sensor is provided on the electromagnetic heating module. When the electromagnetic heating module heats the inner cylinder, if the temperature detected by the first temperature sensor is higher than a first preset temperature T1, the electromagnetic heating module is determined to be in a dry-burning state.

[0012] Furthermore, the drum washing machine also includes a second temperature sensor for detecting the temperature between the outer drum and the inner drum. During the process of the electromagnetic heating module heating the inner drum, if the temperature detected by the second temperature sensor is higher than the second preset temperature T2, the electromagnetic heating module is determined to be in a dry-burning state.

[0013] Furthermore, when the electromagnetic heating module heats the inner drum, the drum washing machine monitors the output power of the electromagnetic heating module. When the output power P of the electromagnetic heating module is greater than the set power P0, it is determined that the electromagnetic heating module is in a dry-burning state.

[0014] Furthermore, the drum washing machine obtains the working current I and the working voltage U of the electromagnetic heating module, and calculates the output power P according to output power P=I×U.

[0015] Furthermore, when it is determined that the electromagnetic heating module is in a dry-burning state, the electromagnetic heating module is controlled to stop heating.

[0016] Furthermore, when it is determined that the electromagnetic heating module is in a dry-burning state, the water inlet device of the drum washing machine is controlled to feed water into the inner drum.

[0017] Furthermore, when the water level in the inner drum reaches a first preset water level H1, the water inlet device is controlled to stop inletting water;

[0018] Preferably, when the water level in the inner drum reaches a second preset water level H2, the electromagnetic heating module is controlled to continue heating the inner drum; the setting of the second preset water level H2 satisfies: H2

[0019] Furthermore, after the water inlet device starts to take in water, if the inner drum is in a stationary state, the inner drum is controlled to rotate at a certain speed.

[0020] ​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;

[0021] When the water level in the inner drum reaches the third preset water level H2, the water is controlled to drain at a speed V 排 The water is drained into the outer cylinder by rotating the cylinder so that the electromagnetic heating module is at least partially immersed in the water.

[0022] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0023] The drum washing machine of the present invention 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, and then make corresponding feedback, thereby preventing the electromagnetic heating module from dry-burning and damaging the clothes in the inner drum, or preventing the electromagnetic heating module from overheating and malfunctioning due to dry-burning, or even causing safety hazards.

[0024] The drum washing machine of the present invention determines whether the electromagnetic heating module is in a dry-burning state by obtaining the temperature and output power of the electromagnetic heating module, or the temperature between the outer drum and the inner drum. The determination of the dry-burning state is accurate and timely. When a dry-burning state occurs, the electromagnetic heating module is controlled to stop heating, which can effectively avoid adverse consequences caused by the dry-burning of the electromagnetic heating module.

[0025] The drum washing machine of the present invention fills water into the inner drum when it determines that the electromagnetic heating module is in a dry-burning state, which can quickly cool the inner drum. After a certain water level is reached in the inner drum, the electromagnetic heating module is automatically controlled to continue heating the inner drum without the need for user operation, thereby automatically eliminating the dry-burning fault.

[0026] The drum washing machine of the present invention controls the inner drum to rotate after the water inlet device starts to fill the water, so that the water injected into the inner drum flows in the inner drum, thereby accelerating the cooling efficiency of the inner drum. 排 The water is drained into the outer cylinder by rotation, so that the electromagnetic heating module is at least partially immersed in water, thereby achieving rapid cooling of the electromagnetic heating module and preventing the electromagnetic heating module from overheating for a long time and malfunctioning.

[0027] 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

[0028] 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:

[0029] Figure 1 2 is a schematic structural diagram of a drum washing machine according to an embodiment of the present invention;

[0030] Figure 2 This is a flow chart of a control method for a drum washing machine in Embodiment 1 of the present invention;

[0031] Figure 3 is a flow chart of a control method for a drum washing machine in a second embodiment of the present invention;

[0032] Figure 4 is a flow chart of a control method for a drum washing machine in a third embodiment of the present invention;

[0033] Figure 5 1 is a front view schematic structural diagram of a drum washing machine in a fourth embodiment of the present invention;

[0034] Figure 6 This invention Figure 5 Schematic diagram of the middle AA surface;

[0035] Figure 7 is a schematic structural diagram of the electromagnetic heating module in the fourth and fifth embodiments of the present invention;

[0036] Figure 8 is an exploded view of a drum washing machine in a fourth embodiment of the present invention;

[0037] Figure 9 1 is a schematic side structural diagram of a drum washing machine in a fourth embodiment of the present invention;

[0038] Figure 10 This invention Figure 9 Schematic diagram of the middle BB surface;

[0039] Figure 11 This invention Figure 10 Schematic diagram of the enlarged structure at point 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 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.

[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 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.

[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] 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 working parameters of the electromagnetic heating module 100 and / or the environmental parameters around the electromagnetic heating module 100.

[0052] like Figure 1 and Figure 2 As shown, in a further solution of this embodiment, a first temperature sensor is provided on the electromagnetic heating module 100. During the process of the electromagnetic heating module 100 heating the inner cylinder, if the temperature detected by the first temperature sensor is higher than the first preset temperature T1, it is determined that the electromagnetic heating module 100 is in a dry-burning state.

[0053] In the above solution, when there is no water in the inner drum 1, the heat generated by the electromagnetic heating module 100 heating the inner drum 1 cannot be further conducted away, causing the temperature of the electromagnetic heating module 100 to rise rapidly, reaching a temperature far higher than that in a non-dry-burn state. The drum washing machine detects the temperature of the electromagnetic heating module 100 during operation to determine whether it is in a dry-burn state. This can promptly and accurately detect the occurrence of a dry-burn condition and then control the drum washing machine to provide corresponding feedback, preventing the electromagnetic heating module 100 from continuing to dry-burn and causing adverse consequences.

[0054] Specifically, in this embodiment, 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.

[0055] 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 .

[0056] 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.

[0057] 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.

[0058] 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:

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Furthermore, in this embodiment, the centrifugal drainage structure provided on the inner drum 1 can achieve a drainage speed V in the inner drum. 排 When draining, open the drain hole 11 to drain.

[0064] 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.

[0065] ​In this embodiment, the electromagnetic heating module 100 is disposed below the outer tube 2, preferably at the lowest point within the outer tube 2. By controlling the inner tube 1 to drain water into the outer tube 2, the drained water collects at the bottom of the outer tube 2, submerging at least a portion of the electromagnetic heating module 100. Heat exchange between the electromagnetic heating module 100 and the water allows for rapid cooling of the electromagnetic heating module 100, preventing prolonged overheating and malfunction.

[0066] In this embodiment, a mounting groove 211 is provided at the bottom of the outer tube 2, and the electromagnetic heating module 100 is mounted in the mounting groove 211. Due to the concave structure of the mounting groove 211, water discharged from the inner tube 1 can be collected in the mounting groove 211, thereby achieving immersion of the electromagnetic heating module 100 with less water discharge.

[0067] Furthermore, in order to control the drainage volume of the inner drum 1, in this embodiment, the drum washing machine controls the inner drum 1 to drain at a speed V 排 Alternatively, the drum washing machine is provided with a water level detection device for detecting the water level in the outer drum 2, and when the water level detected by the water level detection device reaches a preset water level, the inner drum 1 is controlled to stop rotating.

[0068] 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 water collected in the mounting groove 211 can be directly drained through the drain port, thereby preventing residual wash water from remaining in the mounting groove 211 after the drain device drains the water.

[0069] 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.

[0070] In this embodiment, while the electromagnetic heating module 100 is heating the inner drum 1, the drum washing machine detects the temperature of the electromagnetic heating module 100 itself to determine whether the electromagnetic heating module 100 is in a dry-burn state. If it is determined to be in a dry-burn state, the electromagnetic heating module 100 is controlled to stop heating. This can promptly and accurately detect the occurrence of a dry-burn situation, preventing the electromagnetic heating module 100 from continuously drying out and damaging clothing or causing malfunctions. When a dry-burn situation is determined to be present, water is also injected into the inner drum 1 to cool it down. 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, resulting in a high degree of automation.

[0071] Example 2

[0072] like Figure 1 and Figure 3 As shown, the difference between this embodiment and the above-mentioned embodiment 1 is that 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 preset temperature T2, it is determined that the electromagnetic heating module 100 is in a dry-burning state.

[0073] In the above solution, the inner drum 1 is subjected to the magnetic field generated by the electromagnetic heating module 100, generating eddy currents to generate heat. In the absence of water in the inner drum 1, the generated heat cannot be effectively conducted away, causing the temperature of the inner drum 1 to rapidly rise to a higher range. This in turn causes the temperature between the outer drum 2 and the inner drum 1 to rise under the influence of the high-temperature inner drum 1. The drum washing machine determines whether the electromagnetic heating module 100 is in a dry-burn state by detecting the temperature between the outer drum 2 and the inner drum 1 during operation. This allows for timely and accurate detection of dry-burn conditions, and allows the washing machine to provide appropriate feedback to prevent the electromagnetic heating module 100 from continuing to dry-burn, leading to adverse consequences.

[0074] In this embodiment, the control method after determining that the electromagnetic heating module 100 is in a dry-burning state is the same as the scheme in the above-mentioned embodiment 1, which can achieve rapid cooling of the inner drum 1 and the electromagnetic heating module 100, and automatic elimination of the dry-burning fault. The drum washing machine can automatically run subsequent programs without user operation, which is convenient for users.

[0075] Example 3

[0076] like Figure 1 and Figure 4 As shown, the difference between this embodiment and the above-mentioned embodiment 1 is that: during the process of the electromagnetic heating module 100 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-heating state.

[0077] Furthermore, when the electromagnetic heating module 100 of the drum washing machine heats the inner drum 1, the working current I and the working voltage U of the electromagnetic heating module 100 are obtained in real time, and the output power P is calculated according to the output power P=I×U.

[0078] In the above solution, when there is no water in the inner drum 1, the heat generated by the electromagnetic heating module 100 heating the inner drum 1 cannot be further conducted away, resulting in a significant difference in the output power P of the electromagnetic heating module 100 when in operation and when there is water in the inner drum 1. Since the output power P can reflect the operating status of the electromagnetic heating module 100 in real time, while the temperature of the electromagnetic heating module 100 itself and its surroundings takes a certain amount of time to change, the drum washing machine determines whether it is in a dry-burn state by monitoring the output power P of the electromagnetic heating module 100 during operation. Compared with the judgment lag that may occur when using temperature as a judgment criterion, the dry-burn state is detected more promptly and accurately, reducing the occurrence of misjudgments.

[0079] In this embodiment, the control method after determining that the electromagnetic heating module 100 is in a dry-burning state is the same as the scheme in the above-mentioned embodiment 1, which can achieve rapid cooling of the inner drum 1 and the electromagnetic heating module 100, and automatic elimination of the dry-burning fault. The drum washing machine can automatically run subsequent programs without user operation, which is convenient for users.

[0080] Example 4

[0081] like Figure 1 and Figures 5 to 11 As shown, this embodiment provides a drum washing machine, which adopts the control method of the drum washing machine described in any one of the above embodiments 1 to 3.

[0082] In this embodiment, the outer cylinder 2 includes a sidewall 210 and a bottom wall 220. A mounting groove 211 is provided on the sidewall 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.

[0083] Furthermore, the electromagnetic heating module 100 includes an electromagnetic heating coil and a plastic shell covering the electromagnetic heating coil. The plastic shell extends along the axis of the outer cylinder 2 to a certain length, one end of which passes through the installation opening 221 and extends into the installation groove 211, and the other end is located outside the installation opening 221.

[0084] 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 .

[0085] 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.

[0086] The specific structure of the mounting base 120 in this embodiment is as follows Figure 7 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 .

[0087] 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 .

[0088] 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.

[0089] 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 .

[0090] 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.

[0091] 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.

[0092] like Figures 7 to 11 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.

[0093] 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.

[0094] Preferably, the bracket 212 is made of plastic material, and will not stimulate eddy current effect and generate heat in the magnetic field generated by the electromagnetic heating module 100.

[0095] 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 .

[0096] 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 .

[0097] 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.

[0098] 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 .

[0099] Preferably, the support portion and the plastic package shell are integrally formed.

[0100] 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.

[0101] 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 .

[0102] 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.

[0103] 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.

[0104] 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.

[0105] Example 5

[0106] like Figure 1 As shown, this embodiment provides a control method for the drum washing machine described in the fourth 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.

[0107] 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.

[0108] 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.

[0109] In this embodiment, there are at least three methods for controlling the inner drum to start rotating to drain water:

[0110] 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;

[0111] Preferably, the drum washing machine receives an instruction to start the electromagnetic heating module 100, and after a first preset time, controls the inner drum 1 to rotate and drain water into the outer drum 2;

[0112] More preferably, the drum washing machine determines the first preset time according to a set washing water heating temperature.

[0113] 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 the first set temperature, the inner drum 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2;

[0114] 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 the second set temperature, the inner tub 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2;

[0115] 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 its corresponding set temperature, the inner drum 1 is controlled to drain at a speed V 排 Rotate to drain water into the outer tube 2.

[0116] 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;

[0117] 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;

[0118] During the washing process, the drum washing machine controls the electromagnetic heating module 100 to start heating the inner drum 1 .

[0119] 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.

[0120] 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.

[0121] 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 time 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.

[0122] 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.

[0123] 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.

[0124] like Figure 1As 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.

[0125] Furthermore, if Figure 1 and Figure 7 As shown, the heat dissipation structure includes heat dissipation holes 111 arranged on the upper surface of the electromagnetic heating module 100 .

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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 wash water during washing; an electromagnetic heating module is disposed between the outer drum and the inner 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; During the process of the electromagnetic heating module heating the inner drum, the drum washing machine determines whether the electromagnetic heating module is in a dry-heating 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 that the electromagnetic heating module is in a dry-burning state, the water inlet device of the drum washing machine is controlled to supply water into the inner drum; after the water inlet device starts to supply water, if the inner drum is in a stationary state, the inner drum is controlled to rotate at a certain speed; The inner drum is provided with a centrifugal drainage structure. When the water level in the inner drum reaches a third preset water level, the inner drum is controlled to drain at a speed V 排 The water is drained into the outer cylinder by rotating the cylinder so that the electromagnetic heating module is at least partially immersed in the water.

2. The control method of the drum washing machine according to claim 1, characterized in that: The electromagnetic heating module is provided with a first temperature sensor. When the electromagnetic heating module heats the inner cylinder, if the temperature detected by the first temperature sensor is higher than a first preset temperature T1, the electromagnetic heating module is determined to be in a dry-burning state.

3. The control method of the drum washing machine according to claim 1, characterized in that: The drum washing machine also includes a second temperature sensor for detecting the temperature between the outer drum and the inner drum. When the electromagnetic heating module heats the inner drum, if the temperature detected by the second temperature sensor is higher than the second preset temperature T2, the electromagnetic heating module is determined to be in a dry-burning state.

4. The control method of the drum washing machine according to claim 1, characterized in that: During the process of the electromagnetic heating module heating the inner drum, the drum washing machine monitors the output power of the electromagnetic heating module. When the output power P of the electromagnetic heating module is greater than the set power P0, it is determined that the electromagnetic heating module is in a dry-heating state.

5. The control method of the drum washing machine according to claim 4, characterized in that: The drum washing machine obtains the working current I and working voltage U of the electromagnetic heating module, and calculates the output power P according to output power P = I×U.

6. The control method for a drum washing machine according to any one of claims 1 to 5, characterized in that: When it is determined that the electromagnetic heating module is in a dry-burning state, the electromagnetic heating module is controlled to stop heating.

7. The control method of the drum washing machine according to claim 6, characterized in that: When the water level in the inner drum reaches a first preset water level H1, the water inlet device is controlled to stop inletting water.

8. The control method of the drum washing machine according to claim 7, characterized in that: When the water level in the inner drum reaches a second preset water level H2, the electromagnetic heating module is controlled to continue heating the inner drum; the setting of the second preset water level H2 satisfies: H2 < H1.

9. The control method of the drum washing machine according to claim 6, characterized in that: The electromagnetic heating module includes a plastic-sealed shell covering the electromagnetic heating coil; a first opening is provided on the upper surface of the plastic-sealed shell, and a second opening is provided on the lower surface 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, forming a heat dissipation hole that passes through the electromagnetic heating module.

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