WO2022100504A1

WO2022100504A1 - Washing machine and control method

Info

Publication number: WO2022100504A1
Application number: PCT/CN2021/128645
Authority: WO
Inventors: 刘凯; 于明亮; 刘晓春; 侯永顺
Original assignee: 青岛海尔滚筒洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2020-11-12
Filing date: 2021-11-04
Publication date: 2022-05-19

Abstract

The present invention relates to the technical field of washing machines. Disclosed are a washing machine and a control method. The washing machine comprises an outer tub and an inner tub. The inner tub is provided inside the outer tub, and can hold washing water independently during washing; an electromagnetic heating module for heating the inner tub is provided in the outer tub; the outer tub comprises a side wall and a bottom wall; the side wall has a mounting slot extending along the axis of the outer tub; one end of the mounting slot extends to the bottom wall of the outer tub, and a mounting opening is formed at the end of the bottom wall corresponding to the mounting slot; the electromagnetic heating module passes through the mounting opening and is mounted in the mounting slot. According to the present invention, by providing the electromagnetic heating module, while no water is present between the inner tub and the outer tub, heating is carried out on the washing water in the inner tub; the electromagnetic heating module passes through the mounting opening on the bottom wall of the outer tub and is mounted in the mounting slot, and assembly is simple and easy to implement.

Description

A washing machine and control method

technical field

The invention belongs to the technical field of washing machines, and in particular relates to a washing machine and a control method.

Background technique

Existing washing machines generally include an inner tub and an outer tub, and a plurality of dewatering holes are provided on the tub wall of the inner tub. However, in the washing process, the washing water between the inner tub and the outer tub will not be used, resulting in a waste of this part of the washing water. At the same time, the dirt generated during the washing process is easy to remain between the inner cylinder and the outer cylinder, which is difficult to clean. Long-term accumulation will pollute the washing water and affect the washing effect.

In order to solve the above problems, the prior art proposes a washing machine without dehydration holes on the inner drum, so that the inner drum can independently hold washing water during the washing process, thereby avoiding water storage between the inner drum and the outer drum during the washing process. It saves the amount of washing water, and also largely avoids the accumulation of dirt between the inner and outer cylinders.

However, since there is no water between the inner tub and the outer tub during the washing process, the washing water cannot be heated by arranging a heating tube in the outer tub in a conventional washing machine. In order to solve the problem of heating washing water in a washing machine without dewatering holes on the inner cylinder, a scheme of arranging an electromagnetic heating module on the outer cylinder is proposed. The electromagnetic heating module can realize non-contact heating by exciting the eddy current effect, and the inner cylinder is made of metal material, so that the inner cylinder itself can be heated by the electromagnetic heating module, thereby achieving the purpose of heating the washing water.

However, for the washing machine using the electromagnetic heating module, how to realize the assembly of the electromagnetic heating module and the outer tub has become a problem to be solved. On the other hand, there is currently no dry-burning protection device provided for the electromagnetic heating module. Once dry burning occurs, it may lead to a series of adverse consequences. In the dry burning state, the temperature of the inner tube will rise rapidly under the action of the electromagnetic heating module, and its temperature will exceed the heating temperature of the washing water under normal circumstances. When there are clothes in the inner tube, the excessive temperature of the inner tube may damage clothing in it. Correspondingly, the electromagnetic heating module itself will also overheat, which may cause damage to the electromagnetic heating module in severe cases. The dry burning of the electromagnetic heating module may even cause accidents such as fire or explosion, which seriously endangers the safety of users.

At the same time, the temperature of the electromagnetic heating module itself is high during heating, and the efficiency of heat exchange between the electromagnetic heating module and the air is low, and it is difficult to achieve effective heat dissipation only by the air flow around the electromagnetic heating module. There may also be metal foreign objects in the outer cylinder that can be excited by the alternating magnetic field. When the electromagnetic heating module is working, the metal foreign objects in the outer cylinder will also be excited by the magnetic field to heat up and heat up rapidly. In order to avoid being affected by the electromagnetic heating module, the outer cylinder itself is generally made of plastic material. The rapid temperature rise of metal foreign objects may cause damage to the outer cylinder, and even cause the working environment temperature of the electromagnetic heating module to rise sharply, resulting in the electromagnetic heating module. damaged condition. Therefore, there is a need to improve the heat dissipation efficiency of the electromagnetic heating module and its surrounding environment.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

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

In order to solve the above-mentioned technical problems, the basic conception of the technical scheme adopted in the present invention is:

The first object of the present invention is to provide a washing machine, the washing machine is a drum washing machine, including an outer cylinder and an inner cylinder, the inner cylinder is arranged in the outer cylinder, and can independently hold washing water during washing; the outer cylinder is provided with An electromagnetic heating module for heating an inner cylinder, the outer cylinder includes a side wall and a bottom wall, and the side wall has a mounting groove extending along the axis of the outer cylinder;

One end of the installation slot extends to the bottom wall of the outer cylinder, and the bottom wall defines an installation opening corresponding to the end of the installation slot; the electromagnetic heating module is installed in the installation slot through the installation opening.

Further, the electromagnetic heating module includes an electromagnetic heating coil and a plastic casing covering the electromagnetic heating coil, the plastic casing extends along the axis of the outer cylinder to a certain length, and one end extends into the installation slot through the installation opening. , the other end is located outside the installation opening;

The electromagnetic heating coil is connected to a connection terminal, and the connection terminal protrudes from the end of the plastic casing outside the installation opening.

Further, the plastic-encapsulated housing includes a housing body and a mounting seat, the housing body is disposed in the mounting groove, and the mounting seat partially passes through the mounting opening; the connection terminal protrudes from the mounting seat.

Further, the mounting seat includes a plug portion that is plugged into the mounting port, and the housing body is inserted into one end of the plug portion that extends into the mounting port;

The other end of the plug-in portion is provided with a limiting boss, and the limiting boss abuts against the bottom wall of the outer cylinder at the outer side of the installation opening.

Further, the side wall of the plug-in portion is provided with a sealing member that is in interference fit with the installation port, the plug-in portion is inserted into the installation port, and the sealing member blocks the installation port.

Further, a bracket for supporting the electromagnetic heating module is arranged in the installation slot, and the bracket is respectively connected with the inner wall of the installation slot and the part of the plastic casing extending into the installation slot;

Preferably, two sides of the plastic-encapsulated casing have insertion grooves extending along the axis of the outer cylinder, the bracket is fixedly connected to the inner wall of the installation groove, and inserted into the insertion grooves from the suspended end of the plastic-encapsulated casing;

Preferably, the bracket is made of plastic material.

Further, the electromagnetic heating module further includes a support portion disposed on the suspended end of the plastic-encapsulated casing, the support portion extends from the suspended end of the plastic-encapsulated casing to the inner wall of the installation groove, and is connected to the inner wall of the installation groove;

Preferably, the support portion is integrally formed with the plastic casing.

Further, the electromagnetic heating module has an upper surface facing the inner cylinder, and the upper surface is a circular arc surface coaxial with the side wall of the inner cylinder.

Further, the installation groove is provided with a drain port communicating with the drain structure of the washing machine.

Further, the water outlet is arranged on the bottom wall of the installation groove below the suspended end of the electromagnetic heating module.

The second object of the present invention is to provide a control method of a washing machine, the washing machine is a drum washing machine, including an outer tub and an inner tub, the inner tub is arranged in the outer tub, and can independently hold washing water during washing; the outer tub An electromagnetic heating module for heating the inner cylinder is arranged in the cylinder;

During the process of heating the inner tub by the electromagnetic heating module, the washing machine determines whether the electromagnetic heating module is in a dry burning state according to the working parameters of the electromagnetic heating module and/or the environmental parameters around the electromagnetic heating module.

Further, the electromagnetic heating module is provided with a first temperature sensor, and in the process of heating the inner cylinder by the electromagnetic heating module, if the temperature detected by the first temperature sensor is higher than the first preset temperature T ₁ , it is determined that the electromagnetic heating module is: dry state.

Further, the washing machine also includes a second temperature sensor for detecting the temperature between the outer tub and the inner tub. During the process of heating the inner tub by the electromagnetic heating module, if the temperature detected by the second temperature sensor is higher than the second preset temperature Assuming the temperature T ₂ , it is determined that the electromagnetic heating module is in a dry burning state.

Further, during the process of the electromagnetic heating module heating the inner drum, the washing machine monitors the output power of the electromagnetic heating module, and 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.

Further, the 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 the output power P=I×U.

Further, when it is determined that the electromagnetic heating module is in a dry burning state, the electromagnetic heating module is controlled to stop heating.

Further, when it is determined that the electromagnetic heating module is in a dry burning state, the water inlet device of the washing machine is also controlled to feed water into the inner tub.

Further, when the water level in the inner cylinder reaches the _first preset water level H1, the water inlet device is controlled to stop water inlet;

Preferably, when the water level in the inner cylinder reaches the second preset water level H ₂ , the electromagnetic heating module is controlled to continue heating the inner cylinder; the setting of the second preset water level H ₂ satisfies: H ₂ <H ₁ .

Further, after the water inlet device starts to feed water, if the inner cylinder is in a static state, the inner cylinder is controlled to rotate at a certain speed.

Further, the inner cylinder is provided with a centrifugal drainage structure, and the centrifugal drainage structure can be opened for drainage when the inner cylinder reaches the drainage speed V _row ;

When the water level in the inner cylinder reaches the _third preset water level H3, the inner cylinder is controlled to rotate at the drainage speed V _row to drain water into the outer cylinder, so that the electromagnetic heating module is at least partially immersed in water.

The third object of the present invention is to provide a control method for a washing machine, the washing machine comprising:

outer cylinder;

an inner cylinder, arranged in the outer cylinder, at least partially made of a metal material that can generate eddy currents in an alternating magnetic field;

The electromagnetic heating module is installed on the outer cylinder, and generates an alternating magnetic field radiating to the periphery to make the inner cylinder heat, and the alternating magnetic field forms a radiation area on the outer cylinder;

When the electromagnetic heating module works to heat the inner cylinder, the radiation area on the outer cylinder is covered by water.

Further, when the electromagnetic heating module operates to generate heat in the inner cylinder, the outer cylinder has water inside, and the water in the outer cylinder covers the inner surface of the radiation area on the outer cylinder.

Further, the electromagnetic heating module includes an electromagnetic heating coil for generating an alternating magnetic field after being energized; the electromagnetic heating module is installed in the bottom area of the outer cylinder, and the radiation area at least includes the coil of the electromagnetic heating module at the bottom of the outer cylinder. projection area;

When the electromagnetic heating module works to heat the inner cylinder, the projection of the water in the outer cylinder to the bottom of the outer cylinder covers the projection area of the coil on the bottom of the outer cylinder;

Preferably, the washing machine is a front-loading washing machine, and the electromagnetic heating module is installed on the wall of the outer cylinder; when the electromagnetic heating module operates to heat the inner cylinder, the projection of the water in the outer cylinder to the wall of the outer cylinder covers the The projected area of the coil on the outer cylinder wall;

Alternatively, the washing machine is a pulsator washing machine, and the electromagnetic heating module is installed on the bottom of the outer cylinder; when the electromagnetic heating module operates to heat the inner cylinder, the projection of the water in the outer cylinder to the bottom of the outer cylinder covers the The projected area of the coil on the bottom of the outer cylinder.

Further, the electromagnetic heating module is installed on the outside of the outer cylinder, and the coil is projected upward to form the projection area; when the electromagnetic heating module works to make the inner cylinder generate heat, the projection of the water surface in the outer cylinder on the inner wall of the outer cylinder covers the projection formed by the coil. projection area.

Further, the electromagnetic heating module is installed inside the outer cylinder, and the water surface in the outer cylinder is not lower than the upper surface of the electromagnetic heating module;

Preferably, there is a certain interval between the water surface in the outer cylinder and the outer wall of the inner cylinder.

Further, the washing machine includes a water inlet device, and the water inlet device feeds water into the outer tub to cover the radiation area.

Further, the washing machine further includes a flow sensor for detecting the water intake of the water inlet device; if the water intake detected by the flow sensor reaches a preset water intake, it is determined that the radiation area is covered by the water in the outer cylinder;

Alternatively, the washing machine further includes a water level sensor for detecting the water level in the outer tub; if the water level detected by the water level sensor reaches a preset water level, it is determined that the radiation area is covered by the water in the outer tub;

Preferably, if the water inflow detected by the flow sensor reaches the preset water inflow, the water inflow device stops water inflow into the outer cylinder;

Or, if the height of the water level detected by the water level sensor reaches the preset water level, the water feeding device stops feeding water into the outer cylinder.

Further, a drain port is provided on the outer cylinder, and the washing machine further includes a drain device connecting the drain port and the outside of the washing machine;

When the electromagnetic heating module works so that the inner cylinder is heated, the drainage device is kept in a closed state, and the communication between the drainage port and the outside of the washing machine is disconnected.

Further, after the washing machine receives the signal to start the washing program, if it is determined that the washing water heating function is turned on, water is fed into the outer tub to cover the radiation area.

Further, the washing machine is a drum washing machine, and the electromagnetic heating module is arranged at the lower part of the outer tub;

Before the electromagnetic heating module starts to heat the inner cylinder, or during the heating of the inner cylinder by the electromagnetic heating module, 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.

Before the electromagnetic heating module starts to heat the inner cylinder, or during the process of heating the inner cylinder by the electromagnetic heating module, the inner cylinder is controlled to rotate at the drainage speed V to _drain water into the outer cylinder.

Further, after receiving the instruction to start the electromagnetic heating module, the washing machine controls the inner tub to rotate at the drainage speed V _row to drain water into the outer tub;

Preferably, the washing machine receives an instruction to activate the electromagnetic heating module, and after a first preset time period _t1 , controls the inner tub to rotate to drain water into the outer tub;

More preferably, the washing machine determines the first preset time period t ₁ according to the set washing water heating temperature.

Further, a first temperature sensor is set on the electromagnetic heating module, and when the temperature detected by the first temperature sensor is higher than the _third preset temperature T3, the inner cylinder is controlled to rotate at the drainage speed V to _drain water in the outer cylinder. ;

And/or, the outer cylinder is provided with a second temperature sensor for detecting the temperature between the inner cylinder and the outer cylinder, when the temperature detected by the second temperature sensor is higher than the _fourth preset temperature T4, control The inner cylinder rotates at the drainage speed V _row to drain water into the outer cylinder.

Further, the washing machine has a washing water heating program. After receiving the instruction to run the washing water heating program, the washing machine controls the inner drum to rotate into the outer drum at the _drainage speed V during the washing process or after the washing is completed. drain.

Further, the washing machine controls the inner tub to continuously rotate for a second preset duration t ₂ at the drainage speed V _row to drain water;

Alternatively, the washing machine is provided with a water level detection device for detecting the water level in the outer tub, and when the water level detected by the water level detection device reaches a preset water level, the inner tub is controlled to reduce the rotational speed.

The control drain device is kept closed during the process of draining the inner tub to the outer tub, and the communication between the drain outlet and the outside of the washing machine is disconnected.

The fourth object of the present invention is to provide a washing machine, comprising an outer tub and an inner tub, the inner tub is arranged in the outer tub, and has a washing chamber that independently holds washing water; the outer tub is provided for heating the inner tub The electromagnetic heating module, the electromagnetic heating module has a heat dissipation structure;

The washing machine preferably adopts the control method of the washing machine described above.

Further, the electromagnetic heating module has an upper surface facing the inner cylinder, and the heat dissipation structure includes a heat dissipation hole disposed on the upper surface.

Further, the electromagnetic heating module comprises an electromagnetic heating coil and a plastic casing covering the electromagnetic heating coil, and the plastic casing 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-encapsulated casing, a second opening is arranged on the lower surface of the plastic-encapsulated casing corresponding to the first opening, and the plastic-encapsulated casing extends from the first opening to the second opening in a direction away from the inner cylinder, A heat dissipation hole is formed through the electromagnetic heating module.

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

In the washing machine of the present invention, an installation opening is provided on the bottom wall of the outer tub, and the electromagnetic heating module is installed in the installation groove on the side wall of the outer tub through the installation opening, and the assembly is simple and easy to implement. There is a limit boss on the mounting seat to limit the position where the mounting seat is inserted into the mounting port, and the installation is more accurate. By arranging a sealing member which is in interference fit with the installation port, the sealing of the installation port is realized, and the situation of water leakage at the installation port is avoided. By arranging the bracket or the support portion, the part of the electromagnetic heating module inserted into the installation slot is supported, so that the electromagnetic heating module is more stably installed in the installation slot, and the hanging end of the electromagnetic heating module is prevented from falling.

The washing machine of the present invention can judge whether the electromagnetic heating module is in a dry-burning state according to the working parameters of the electromagnetic heating module and/or the environmental parameters around the electromagnetic heating module, and then can make corresponding feedback, so as to prevent the electromagnetic heating module from being damaged by dry-burning in the inner tub. Clothes, or the electromagnetic heating module overheating due to dry burning, or even causing a safety hazard. By obtaining the temperature and output power of the electromagnetic heating module, or the temperature between the outer cylinder and the inner cylinder, it is judged whether the electromagnetic heating module is in a dry burning state, and the judgment of the dry burning state is accurate and timely. The heating module stops heating, which can effectively avoid the adverse consequences caused by the dry burning of the electromagnetic heating module.

In the present invention, during the operation of the electromagnetic heating module, the radiation area on the outer cylinder covered by the alternating magnetic field is covered by water, so that rapid heat dissipation of the outer cylinder can be achieved by exchanging heat with water. During the operation of the electromagnetic heating module, in the case of residual metal foreign bodies in the outer cylinder, the heat generated by the metal foreign bodies excited by the alternating magnetic field is transferred to the outer cylinder, and can be further dissipated by contacting with water, avoiding the need for The metal foreign body heats up rapidly and forms an abnormally high temperature environment in the outer cylinder, thereby causing a potential safety hazard, which plays a role in heating protection during the working process of the electromagnetic heating module.

The water inlet device is arranged to feed water into the outer cylinder to realize the coverage of the radiation area, and the structure is simple and easy to realize. The washing machine is equipped with a flow sensor or a water level sensor, and the water volume in the outer cylinder is monitored in real time through the flow sensor or water level sensor, and the water volume in the outer cylinder is controlled to just completely cover the radiation area, which not only avoids the insufficient water volume and cannot play a role in heating protection, but also It can prevent the heating efficiency of washing water in the inner tub from being reduced due to excessive water inflow.

The washing machine immerses at least part of the electromagnetic heating module through draining water from the inner tub to the outer tub, so that the electromagnetic heating module can contact the surrounding washing water for heat exchange, thereby realizing the heat dissipation of the electromagnetic heating module, and the heat dissipation effect is good, preventing the working process of the electromagnetic heating module. failure due to overheating.

The washing machine of the present invention further improves the heat dissipation efficiency of the electromagnetic heating module by arranging a heat dissipation structure on the electromagnetic heating module and combining with the method of immersing the electromagnetic heating module with washing water for heat dissipation. The heat dissipation structure is arranged to pass through the heat dissipation holes on the upper and lower surfaces of the electromagnetic heating module, which increases the contact area between the electromagnetic heating module and the surrounding air and washing water, so that the heat dissipation efficiency is further improved.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

1 is a schematic structural diagram of a washing machine in Embodiments 1 to 3 of the present invention;

2 is a schematic front view of the structure of the washing machine in Embodiments 1 to 3 of the present invention;

Fig. 3 is the schematic diagram of A-A section in Fig. 2 of the present invention;

4 is a schematic structural diagram of an electromagnetic heating module in Embodiments 1 to 3 of the present invention;

5 is an exploded view of the washing machine in Embodiments 1 to 3 of the present invention;

6 is a schematic side view of the structure of the washing machine in Embodiments 1 to 3 of the present invention;

Fig. 7 is the schematic diagram of B-B section in Fig. 6 of the present invention;

Fig. 8 is the enlarged structure schematic diagram of C place in Fig. 7 of the present invention;

9 is a flowchart of a control method of a washing machine in the first embodiment of the second embodiment of the present invention;

10 is a flow chart of the control method of the washing machine in the second scheme of the second embodiment of the present invention;

11 is a flow chart of the control method of the washing machine in the third scheme of the second embodiment of the present invention;

12 is a flowchart of the control method of the washing machine in the first solution of the third embodiment of the present invention;

13 is a flow chart of the control method of the washing machine in the second scheme of the third embodiment of the present invention;

14 is a flow chart of the first control method of the washing machine in the third scheme of the third embodiment of the present invention;

15 is a flowchart of the second control method of the washing machine in the third scheme of the third embodiment of the present invention;

16 is a schematic structural diagram of a washing machine in Embodiment 4 of the present invention;

17 is a schematic structural diagram of a washing machine in Embodiment 5 of the present invention;

18 is a perspective structural schematic diagram of a partial top view of the bottom of the outer cylinder in the fourth and fifth embodiments of the present invention.

In the figure: 1. Inner cylinder; 2. Outer cylinder; 3. Power supply line; 11. Drainage hole; 12. Lifting ribs; 13. Inner cylinder door; 100. Electromagnetic heating module; 110. Shell body; 111. Heat dissipation hole; 112, socket; 120, mounting seat; 121, socket; 122, limit boss; 123, seal; 130, terminal; 210, side wall; 211, mounting slot; 212, bracket; 213, Limiting part; 220, bottom wall; 221, installation port; 300, electromagnetic heating module; 310, electromagnetic heating coil; 320, plastic casing; 321, fixing part; 330, rectifier; 340, driver; 400, box body; 410 , upper panel; 420, bottom plate; 421, foot; 430, front panel; 431, door; 500, drainage device; 600, detergent box; 700, control panel.

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

Detailed ways

In order to make the purposes, 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 with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

As shown in FIG. 1 to FIG. 3 , this embodiment provides a drum washing machine, which includes an outer tub 2 and an inner tub 1 . The inner tub 1 is arranged in the outer tub 2 and can independently hold washing water during washing.

In this embodiment, no dewatering holes are provided on the wall of the inner cylinder 1, and the inner cylinder 1 is in a closed state during the washing process, and can independently hold washing water. Drainage holes 11 are arranged on the wall of the inner cylinder, and the drainage holes 11 are blocked by the sealing assembly during the washing process. When the inner cylinder 1 reaches a certain speed, the sealing assembly can open the drainage holes 11 under the action of centrifugal force to realize the washing water. discharge.

In an implementation of this embodiment, a lifting rib is installed on the wall of the inner cylinder 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 is a blocked state, keeping the inner cylinder 1 closed to hold the washing water independently, and the centrifugal drainage structure can be opened under the action of centrifugal force, so that the washing water can be discharged through the drainage hole 11 .

Specifically, the centrifugal drainage structure includes a reciprocating sealing plunger and an elastic member for elastically restoring the sealing plunger. The sealing plunger can reciprocate to open or block the drainage hole 11 . The sealing plunger is connected with a counterweight block through a lever. When the rotation speed of the inner cylinder 1 reaches the drainage speed V _row , the fitting block moves away from the axis of the inner cylinder 1 under the action of centrifugal force, driving the sealing plunger to approach the axis of the inner cylinder 1. The directional movement opens the drainage hole 11 . When the inner cylinder 1 rotates at a low speed or does not rotate, the elastic member pushes the sealing plunger to move away from the axis of the inner cylinder 1 to block the drainage hole 11 , so as to seal the inner cylinder 1 .

In this embodiment, an electromagnetic heating module 100 for heating the inner cylinder 1 is arranged in the outer cylinder 2 . The cylinder wall of the inner cylinder 1 is made of metal material to generate eddy current effect to generate heat by the magnetic field generated by the electromagnetic heating module 100 , and the outer cylinder 2 is made of plastic material that does not induce eddy current effect in the magnetic field.

The outer cylinder 2 includes a side wall 210 and a bottom wall 220 , and the side wall 210 has an installation groove 211 extending along the axis of the outer cylinder 2 . One end of the installation groove 211 extends to the bottom wall 220 of the outer cylinder 2 , and an installation opening 221 is defined on the bottom wall 220 corresponding to the end of the installation groove 211 . The electromagnetic heating module 100 is installed in the installation slot 211 through the installation opening 221 .

In the above solution, the drum washing machine has an installation opening 221 on the bottom wall 220 of the outer tub 2, and the electromagnetic heating module 100 is installed in the installation groove 211 on the side wall 210 of the outer tub 2 through the installation opening 221, which is simple to assemble and easy to implement.

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

The electromagnetic heating coil is connected to the connection terminal 130 , and the connection terminal 130 protrudes from the end of the plastic casing outside the installation opening 221 .

Further, as shown in FIG. 2 to FIG. 4 , the plastic-encapsulated housing includes a housing body 110 and a mounting seat 120 , the housing body 110 is arranged in the mounting groove 211 , the mounting seat 120 partially passes through the mounting opening 221 , and the wiring terminal 130 extends from the mounting seat 120 Pass it out and connect it to the power supply line 3 of the front-loading washing machine.

In the above solution, the wiring terminal 130 protrudes from the right end of the mounting seat 120 to extend to the outside of the mounting port 221, and then can be connected to the power supply line 3 of the drum washing machine, so as to supply power to the electromagnetic heating module 100, and to carry out the operation on the inner cylinder 1. heating.

The specific structure of the mounting seat 120 in this embodiment is shown in FIG. 4 . The mounting seat 120 includes a plug portion 121 that is plugged into the mounting port 221 , and the housing body 110 is inserted into one end of the plug portion 121 that extends into the mounting port 221 .

The other end of the plug-in portion 121 is provided with a limiting boss 122 , and the limiting boss 122 abuts against the bottom wall 220 of the outer cylinder 2 at the outer side of the installation opening 221 .

In the above solution, the left end of the plug portion 121 is a hollow structure, and the housing body 110 is inserted into the left end of the plug portion 121, thereby enclosing the electromagnetic heating coil inside the plastic casing. The right end of the plug-in portion 121 is provided with a limit boss 122 , and the limit boss 122 abuts against the bottom wall 220 to limit the position of the mounting seat 120 , so that the installation position of the electromagnetic heating module 100 is more accurate.

In a further solution of this embodiment, the side wall of the plug-in portion 121 has a sealing member 123 in an interference fit with the installation port 221 , the plug-in portion 121 is inserted into the installation port 221 , and the sealing member 123 blocks the installation port 221 .

In the above solution, a sealing member 123 is provided on the peripheral side of the right end of the plug-in portion 121 , and the sealing member 123 can be made of rubber and has an interference fit with the installation port 221 . During the process of inserting the insertion portion 121 into the installation opening 221 , the sealing member 123 on the peripheral side of the insertion portion 121 is also gradually inserted into the installation opening 221 . When the limiting boss 122 abuts against the bottom wall 220 , the sealing member 123 completely enters the installation opening 221 . Due to the interference fit between the seal 123 and the installation port 221 , the seal 123 can block the installation port 221 after entering the installation port 221 , thereby avoiding water leakage at the installation port 221 and causing the risk of water leakage and electricity leakage.

In this embodiment, the electromagnetic heating module 100 can be assembled first as an independent module, and the assembled electromagnetic heating module 100 can be directly inserted into the installation slot 211 through the installation opening 221 , and then the wiring terminals 130 exposed outside the installation opening 221 can be inserted into the installation slot 211 . Connecting to the power supply line 3 of the drum washing machine completes the assembly of the electromagnetic heating module 100 and the outer tub 2 .

As shown in FIG. 4 to FIG. 8 , in the preferred solution of this embodiment, brackets 212 for supporting the electromagnetic heating module 100 are provided in the installation groove 211 , and the brackets 212 extend into and install with the inner wall of the installation groove 211 and the plastic casing respectively. Part of the groove 211 is connected, that is, the bracket 212 is connected with the housing body 110 .

Specifically, the two sides of the plastic-encapsulated casing, that is, the left and right sides of the casing body 110, respectively have insertion slots 112 extending along the axis of the outer cylinder 2, and the brackets 212 are fixedly connected to the inner wall of the installation slot 211, and are connected from the inner wall of the plastic-encapsulated casing. The suspended end is inserted into the insertion slot 112 .

Preferably, the bracket 212 is made of plastic material, and the eddy current effect will not be excited in the magnetic field generated by the electromagnetic heating module 100 to cause heat generation.

More preferably, the bracket 212 is integrally formed with the side wall 210 of the outer cylinder 2 , and is formed to extend from the inner walls of the left and right sides of the installation groove 211 to the inside of the installation groove 211 .

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

In the above solution, the extension length of the electromagnetic heating module 100 in the axial direction of the outer cylinder 2 is relatively long, and the electromagnetic heating module 100 itself has a relatively large weight. 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 under the influence of gravity, and in severe cases, the assembly structure at the mounting seat 120 and the mounting opening 221 may be damaged. By arranging the bracket 212 to support the part of the electromagnetic heating module 100 extending into the installation slot 211 , the electromagnetic heating module 100 can be installed in the installation slot 211 more stably.

In another preferred solution of this embodiment, the electromagnetic heating module further includes a support portion disposed on the suspended end of the plastic-encapsulated casing, the supporting portion extending from the suspended end of the plastic-encapsulated casing to the inner wall of the installation groove and connected to the inner wall of the installation groove.

Preferably, the support portion is integrally formed with the plastic casing.

In the above solution, the support portion also plays the role of supporting the suspended end of the electromagnetic heating module, which ensures the stability of the electromagnetic heating module being installed in the installation slot. The support part is integrally formed with the shell body of the plastic-encapsulated shell, and there is no need to separately arrange parts for supporting the electromagnetic heating module, and the structure is simpler. When installing the electromagnetic heating module, insert the mounting seat into the mounting opening from the outside of the bottom wall, then insert the shell body provided with the support part into the plug-in part of the mounting seat from the inside of the mounting opening, and seal the electromagnetic heating coil. The wall of the cylinder and the bottom of the cylinder are assembled together, that is, the assembly of the outer cylinder and the electromagnetic heating module is completed.

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

In this embodiment, the upper surface of the electromagnetic heating module 100 is set as a circular arc surface coaxial with the side wall of the inner cylinder 1, so that the distances between the upper surface of the electromagnetic heating module 100 and the side wall of the inner cylinder 1 are equal to each other. equal, so that the side wall of the inner cylinder 1 is heated evenly, so as to achieve uniform heating of the washing water.

In a further solution of this embodiment, the installation groove 211 is provided with a drain port that communicates with the drain structure of the drum washing machine.

The side wall 210 of the outer cylinder 2 is provided with a drainage groove communicating with the drainage structure, so that the washing water can be collected, so that the washing water can be discharged more easily. In this embodiment, a water outlet is provided on the installation groove 211 , so that the installation groove 211 acts as a water discharge groove at the same time, and the same structure can realize multiple functions at the same time, which simplifies the structure of the outer cylinder 2 .

On the other hand, the installation groove 211 in this embodiment forms a groove structure on the side wall 210 of the outer cylinder 2 . , the washing water that cannot be discharged is likely to remain in the installation tank 211 . The installation tank 211 is provided with a drain port, so that the washing water collected in the installation tank 211 can be directly discharged, and the situation that the washing water remains in the installation tank 211 is avoided.

Further, the water outlet is arranged on the bottom wall of the installation groove 211 below the suspended end of the electromagnetic heating module 100 .

In the above solution, the setting position of the drain port is set as far as possible from the installation port 221, which avoids the tendency of the washing water in the installation tank 211 to collect near the installation port 221, further reduces the risk of water leakage at the installation port 221, and thus avoids the Therefore, the connection terminal 130 and the power supply line 3 are in contact with the washing water to cause an electric leakage accident.

In this embodiment, an electromagnetic heating module 100 is arranged in the outer cylinder 2, and the magnetic field generated by the electromagnetic heating module 100 causes the eddy current effect on the cylinder wall of the inner cylinder 1, so that the cylinder wall of the inner cylinder 1 generates heat to heat the washing water. By opening the installation opening 221 in the cylinder bottom 220 of the outer cylinder 2, the electromagnetic heating module 100 can be directly inserted into the installation slot 211 through the installation opening 221 as an independent module, and the assembly is simple. By designing the mounting seat 120 of the electromagnetic heating module 100 , the mounting position of the electromagnetic heating module 100 is made more accurate, and the sealing member 123 realizes the sealing of the mounting port 221 . The setting of the bracket 212 supports the part of the electromagnetic heating module 100 that extends into the installation slot 211 , so as to avoid the length and weight of the electromagnetic heating module 100 from affecting the stability of its installation, and at the same time to avoid the connection between the installation seat 120 and the installation opening 221 . The assembly structure is damaged.

Embodiment 2

This embodiment provides a control method for a drum washing machine. As shown in FIG. 1 , the drum washing machine may be the washing machine described in the first embodiment.

Specifically, the control method described in this embodiment includes: during the process of heating the inner drum by the electromagnetic heating module 100, the drum washing machine determines the electromagnetic heating according to the working parameters of the electromagnetic heating module 100 and/or the environmental parameters around the electromagnetic heating module 100. Whether the module 100 is in a dry burning state.

In the above solution, the drum washing machine can judge whether the electromagnetic heating module 100 is in the dry burning state according to the working parameters of the electromagnetic heating module 100 and/or the environmental parameters around the electromagnetic heating module 100, and the judgment of the occurrence of the dry burning state is accurate and timely, and further can Corresponding feedback is made to prevent the electromagnetic heating module 100 from dry-burning and damaging the clothes in the inner tub 1, or the electromagnetic heating module 100 being overheated and malfunctioning due to dry-burning, or even causing a safety hazard.

The solutions for determining whether the electromagnetic heating module 100 is in a dry burning state for the drum washing machine includes at least the following three solutions:

Scheme 1, as shown in FIG. 1 and FIG. 9 , the electromagnetic heating module 100 is provided with a first temperature sensor. During the process of heating the inner cylinder by the electromagnetic heating module 100, if the temperature detected by the first temperature sensor is higher than the first set temperature At the temperature T ₁ , it is determined that the electromagnetic heating module 100 is in a dry burning state.

In the above solution, when there is no water in the inner cylinder 1, the heat generated by the electromagnetic heating module 100 heating the inner cylinder 1 cannot be further conducted out, which will cause the temperature of the electromagnetic heating module 100 itself to rise rapidly, reaching far higher than the non-heating temperature. temperature in dry state. The drum washing machine judges whether the electromagnetic heating module 100 is in a dry burning state by detecting its own temperature during the working process, and can detect the occurrence of dry burning in time, and then control the drum washing machine to make corresponding feedback to prevent the electromagnetic heating module 100 from continuing to dry burning. lead to adverse consequences.

Scheme 2, as shown in Figures 1 and 10, the drum washing machine includes a second temperature sensor for detecting the temperature between the outer tub 2 and the inner tub 1. During the process of heating the inner tub by the electromagnetic heating module 100, if the first If the temperature detected by the two temperature sensors is higher than the second set temperature T ₂ , it is determined that the electromagnetic heating module 100 is in a dry burning state.

In the above solution, the inner cylinder 1 is subjected to the magnetic field generated by the electromagnetic heating module 100 to generate an eddy current effect to generate heat. When there is no water in the inner cylinder 1, the generated heat cannot be effectively conducted out, which will cause the temperature of the inner cylinder 1 itself. The temperature rises rapidly to a higher range, so that the temperature between the outer cylinder 2 and the inner cylinder 1 rises under the influence of the high temperature inner cylinder 1 . The drum washing machine judges whether the electromagnetic heating module 100 is in a dry burning state by detecting the temperature between the outer drum 2 and the inner drum 1 during the operation of the electromagnetic heating module 100, and can also detect the occurrence of dry burning in time, and then controls the drum washing machine to make Corresponding feedback can prevent the electromagnetic heating module 100 from continuing to dry out and cause adverse consequences.

Option 3, as shown in FIG. 1 and FIG. 11 , during the process of heating the inner tub 1 by the electromagnetic heating module 100 , 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 P ₀ , it is determined that the electromagnetic heating module 100 is in a dry burning state. Specifically, in the process of heating the inner drum 1 by the electromagnetic heating module 100, the drum washing machine acquires the working current I and the working voltage U of the electromagnetic heating module 100 in real time, and calculates the output power P according to the output power P=I×U.

In the above solution, when there is no water in the inner cylinder 1, the heat generated by the electromagnetic heating module 100 heating the inner cylinder 1 cannot be further conducted out, which will cause the output power P of the electromagnetic heating module 100 in the working state and the inner cylinder 1. There is a big difference when there is water. Since the output power P can reflect the working condition of the electromagnetic heating module 100 in real time, and the temperature of the electromagnetic heating module 100 itself and its surroundings needs to change for a certain period of time, the drum washing machine judges whether it is by monitoring the output power P of the electromagnetic heating module 100 during the working process. In the dry burning state, compared with the judgment lag phenomenon that may occur when using temperature as the judgment standard, the detection of the dry burning situation is more timely and accurate, which can reduce the occurrence of misjudgments, and has better safety and reliability.

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 damage the clothes in the inner tub or damage the electromagnetic heating module 100 .

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

When the water level in the inner cylinder ₁ reaches the first preset water level H1, the water inlet device is controlled to stop water inlet.

In the above solution, when the electromagnetic heating module 100 is controlled to stop heating, water is also injected into the inner cylinder 1 through the water inlet device. Since the water inlet device is connected with the tap water to achieve water supply, the water injected into the inner cylinder 1 is normal temperature water, so that the high temperature inner cylinder can be rapidly cooled. When there are clothes in the inner tub 1, the clothes can also be cooled down quickly, so as to avoid damage to the clothes when they are in a high temperature environment for a long time.

In the preferred solution of this embodiment, when the water level in the inner cylinder 1 reaches the second preset water level H ₂ , the electromagnetic heating module 100 is controlled to continue heating the inner cylinder. The setting of the second preset water level H ₂ satisfies: H ₂ <H ₁ .

In the above solution, when a certain water level is reached in the inner cylinder, the electromagnetic heating module 100 is automatically controlled to restart to continue heating the inner cylinder 1, and subsequent programs can continue to run without user operation, thus realizing automatic elimination of dry burning faults.

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 according to the operating parameters of the electromagnetic heating module and/or environmental parameters around the electromagnetic heating module. When it is determined that the electromagnetic heating module is in a dry burning state, the electromagnetic heating module 100 is controlled to stop heating, and the water feeding device is controlled to feed water into the inner cylinder 1 .

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

In a further solution of this embodiment, after the water inlet device starts to feed water, if the inner cylinder 1 is in a static state, the inner cylinder 1 is controlled to rotate at a certain speed. By controlling the rotation of the inner cylinder 1, the water injected into the inner cylinder 1 flows in the inner cylinder 1, and the cooling efficiency of the inner cylinder 1 is accelerated.

Further, in this embodiment, during the water inflow process, when the water level in the inner cylinder 1 reaches the _third preset water level H3, the inner cylinder 1 is controlled to rotate at the drainage speed V to _drain water in the outer cylinder 2, so that the electromagnetic The heating module 100 is at least partially immersed in water.

In the above solution, since the electromagnetic heating module 100 is disposed at the lower part of the outer cylinder 2 , by controlling the inner cylinder 1 to drain water into the outer cylinder 2 , the discharged water can collect to the bottom of the outer cylinder 2 , thereby submerging at least part of the electromagnetic heating module 100 . By contacting the electromagnetic heating module 100 with water to perform heat exchange, rapid cooling of the electromagnetic heating module 100 can be achieved, preventing the electromagnetic heating module 100 from overheating for a long time and causing failure.

In this embodiment, in the process of heating the inner tub 1 by the electromagnetic heating module 100, the drum washing machine can determine whether the electromagnetic heating module 100 is in a dry burning state according to the working parameters of the electromagnetic heating module 100 and/or the environmental parameters around the electromagnetic heating module 100 , and control the electromagnetic heating module 100 to stop heating when it is determined to be in a dry burning state, so that the occurrence of dry burning can be detected in a timely and accurate manner, so as to avoid the electromagnetic heating module 100 continuing to dry and burn to damage clothes or cause malfunctions. When it is determined that dry burning occurs, water is also injected into the inner cylinder 1 to cool down, and when the water level in the inner cylinder 1 reaches a certain height, the electromagnetic heating module 100 is restarted to continue heating, and subsequent programs can be automatically run without user operation. high.

Embodiment 3

Specifically, the control method described in this embodiment includes: before the electromagnetic heating module 100 starts to heat the inner cylinder 1, or during the process of heating the inner cylinder 1 by the electromagnetic heating module 100, controlling the inner cylinder 1 to drain water into the outer cylinder 2, The electromagnetic heating module 100 is at least partially immersed in water.

In this embodiment, before the electromagnetic heating module 100 starts to heat the inner cylinder 1, or during the process of heating the inner cylinder 1 by the electromagnetic heating module 100, the inner cylinder 1 is controlled to rotate at the drainage speed V to _drain water into the outer cylinder 2.

In the above solution, by controlling the inner cylinder 1 to drain water into the outer cylinder 2 to immerse at least part of the electromagnetic heating module 100, the electromagnetic heating module 100 can be in contact with the surrounding washing water for heat exchange, thereby realizing the heat dissipation of the electromagnetic heating module 100, The heat dissipation effect is good, which prevents the electromagnetic heating module from malfunctioning due to overheating during the working process.

In this embodiment, the schemes for controlling the start of rotation of the inner cylinder to drain water include at least the following three solutions:

Option 1, as shown in Figure 1 and Figure 12, after receiving the instruction to start the electromagnetic heating module 100, the drum washing machine controls the inner tub 1 to rotate at the drainage speed V to _drain water into the outer tub 2;

Preferably, the drum washing machine receives an instruction to activate the electromagnetic heating module 100, and controls the inner tub 1 to rotate to drain water into the outer tub ₂ after a first preset time period t1;

More preferably, the drum washing machine determines the first preset time period t ₁ according to the set washing water heating temperature.

In the above solution, the drum washing machine controls the electromagnetic heating module to start working after receiving the instruction to start the electromagnetic heating module 100 to heat the inner tub 1, preferably after the first preset time period _t1 , and then controls the inner tub to rotate to drain water into the outer tub , so that the electromagnetic heating module 100 is not immersed in the washing water in the early stage of heating. In this way, in the early stage of heating, the heating efficiency of the electromagnetic heating module 100 will not be affected by soaking in the washing water, which ensures the heating rate of the washing water in the early stage of heating, and enables the washing water to quickly reach the set temperature.

When the set washing water heating temperature is different, the heating efficiency of the electromagnetic heating module 100 is also different, and the time required to reach a higher temperature is also different. The drum washing machine determines the first preset time period t ₁ according to the set washing water heating temperature. For different washing water heating temperature setting values, the time interval between the electromagnetic heating module 100 turning on and controlling the rotation of the inner tub 1 to drain water is different. , so that under different setting values of the washing water heating temperature, the temperature of the electromagnetic heating module 100 when immersed in the washing water is basically the same.

Scheme 2, as shown in FIG. 1 and FIG. 13 , 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 _third preset temperature T3, the internal control Drum 1 rotates to _drain water in outer drum 2 at drainage speed V;

Alternatively, the outer cylinder 2 is provided with a second temperature sensor for detecting the temperature between the inner cylinder 1 and the outer cylinder 2, and when the temperature detected by the second temperature sensor is higher than the _fourth preset temperature T4, the control Drum 1 rotates to _drain water in outer drum 2 at drainage speed V;

Alternatively, the first temperature sensor and the second temperature sensor can also be set at the same time. When the temperature detected by any one of the temperature sensors is higher than its corresponding preset temperature, the inner cylinder 1 is controlled to rotate at the _drainage speed V to the outer cylinder 2. Medium drainage.

In the above solution, the temperature of the electromagnetic heating module 100 and its surroundings is detected by setting a temperature sensor, and when the detected temperature reaches a certain value, the inner cylinder 1 is controlled to rotate to drain water into the outer cylinder 2, so that the electromagnetic heating module 100 does not operate in the early stage of heating. Immerse in wash water. In this way, in the early stage of heating, the heating efficiency of the electromagnetic heating module 100 will not be affected by soaking in the washing water, which ensures the heating rate of the washing water in the early stage of heating, and enables the washing water to quickly reach the set temperature. At the same time, by directly controlling the drainage of the inner cylinder 1 by detecting the temperature, the control of the node where the inner cylinder 1 starts to drain is more accurate.

Option 3, as shown in Figures 1 and 14, the drum washing machine has a washing water heating program. After receiving the instruction to run the washing water heating program, the drum washing machine controls the inner drum 1 to drain the rotation speed during the washing process. The V _row rotates to drain water into the outer drum 2, and after the water inflow is completed, the drum washing machine is controlled to run according to the set washing program to wash;

Alternatively, as shown in FIG. 1 and FIG. 15 , after the washing is completed, the drum washing machine first controls the inner drum 1 to rotate to the outer drum 2 at the _drainage speed V, and then controls the drum washing machine after at least partially immersing the electromagnetic heating module 100 The washing is performed according to the set washing program; the drum washing machine controls the electromagnetic heating module 100 to start heating the inner tub 1 during the running of the washing program.

In the above solution, after receiving the instruction to run the washing water heating program, the drum washing machine determines that the electromagnetic heating module 100 needs to be activated to heat the inner tub 1 in the subsequent washing process. Controlling the rotation of the inner tub 1 to drain water into the outer tub 2 during the water intake process before the start of washing or after the water intake is completed, the operation of immersing the electromagnetic heating module 100 can be completed before starting to wash the clothes, so that the subsequent washing process does not occur. It is necessary to suspend the washing program in the middle to perform the operation of draining the water into the outer tub 2 . In this way, the situation of changing the rotational speed of the inner tub 1 during the washing process and affecting the washing effect of the clothes is avoided.

In order to control the drainage volume of the inner tub 1, in a further solution of this embodiment, the drum washing machine controls the inner tub 1 to continuously rotate at the drainage speed V _row for a second preset time period t ₂ to drain water. By controlling the rotation time of the inner drum 1, that is, the drainage time, the drainage rate of the drum washing machine is basically _unchanged at a certain drainage speed V, so that the drainage volume of the electromagnetic heating module 100 can be controlled every time the inner drum 1 is drained. Basically the same.

In another solution of this embodiment, a water level detection device for detecting the water level in the outer tub 2 is provided on the drum washing machine, and when the water level detected by the water level detection device reaches a preset water level, the inner tub 1 is controlled to lower Rotating speed.

In the above solution, controlling the inner cylinder 1 to reduce the rotational speed until the centrifugal drainage structure blocks the drainage holes 11, or directly controlling the inner cylinder 1 to stop rotating, can control the inner cylinder 1 to stop draining water. A water level detection device is provided to detect the water level in the outer cylinder 2 to control the inner cylinder 1 to stop draining water, so that each time the electromagnetic heating module 100 is immersed to dissipate heat, the drainage volume of the inner cylinder 1 remains the same.

In this embodiment, the drain port on the installation groove 211 is communicated with the outside of the drum washing machine through the drain structure. In order to ensure that the electromagnetic heating module 100 can be submerged by the washing water in the process of heating the inner drum 1 to realize heat dissipation, the control drainage structure is kept closed during the process of draining the inner drum 1 to the outer drum 2, and the drain outlet is disconnected from the drum washing machine. The external communication allows the drained washing water to remain in the installation tank 211 to submerge the electromagnetic heating module 100 .

As shown in FIG. 1 , this embodiment further provides a drum washing machine, which adopts the above-mentioned control method of the 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 realized through the heat dissipation structure.

Further, as shown in FIG. 3 and FIG. 4 , the heat dissipation structure includes heat dissipation holes 111 disposed on the upper surface of the electromagnetic heating module 100 .

Specifically, the plastic casing has an upper surface facing the inner cylinder 1 and a lower surface opposite to the upper surface. A first opening is arranged on the upper surface of the plastic-encapsulated casing, and a second opening is arranged on the lower surface of the plastic-encapsulated casing corresponding to the first opening. The plastic casing 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 penetrating the electromagnetic heating module 100 .

The electromagnetic heating module 100 is provided with heat dissipation holes 111 running through the upper and lower sides, thereby increasing the surface area of the electromagnetic heating module 100, and cooperating to control the heat dissipation method of the electromagnetic heating module 100 immersed in the water in the inner cylinder 1 and the outer cylinder 2, that is, the electromagnetic heating is increased. The contact area of the module 100 with the surrounding air and washing water further improves the heat dissipation efficiency.

In this embodiment, during the process of heating the inner cylinder 1 by the electromagnetic heating module 100, the electromagnetic heating module 100 is at least partially immersed in the washing water by controlling the rotation of the inner cylinder 1 to drain water into the outer cylinder 2. The washing water of 100 realizes the heat dissipation of the electromagnetic heating module 100, and the heat dissipation effect is good, which prevents the electromagnetic heating module from malfunctioning due to overheating during the working process. The electromagnetic heating module 100 is provided with heat dissipation holes 111 penetrating up and down, which increases the contact area between the electromagnetic heating module 100 and the surrounding air and washing water, and further improves the heat dissipation efficiency of the electromagnetic heating module 100 .

Embodiment 4

This embodiment provides a washing machine and a control method thereof.

As shown in FIG. 16 , the washing machine described in this embodiment is a drum washing machine, including:

outer cylinder 2;

The inner cylinder 1, arranged in the outer cylinder 2, is at least partially made of a metal material that can generate eddy currents in an alternating magnetic field;

The electromagnetic heating module 300 is installed on the outer cylinder 2 , and generates an alternating magnetic field radiating to the periphery to make the inner cylinder 1 generate heat, and the alternating magnetic field forms a radiation area on the outer cylinder 2 .

Specifically, the inner cylinder 1 in this embodiment is not provided with a dehydration hole, and an openable/closeable inner cylinder door 13 is provided at the cylinder mouth of the inner cylinder 1. When the inner cylinder door 13 is closed, a closed washing cavity is formed inside the inner cylinder 1. Wash water can be used independently in the washing and rinsing stages.

Drain holes are arranged on the wall of the inner cylinder 1, and a centrifugal drainage structure is installed. The initial state of the centrifugal drainage structure is the state of blocking the drainage holes, so as to keep the inner cylinder 1 closed and independent to hold water. When the rotation speed of the inner cylinder 1 reaches the drainage rotation speed, the centrifugal drainage structure can open the drainage holes under the action of centrifugal force, thereby realizing the drainage function of the inner cylinder 1 . In the washing machine of the present embodiment, a lifting rib 12 is provided on the wall of the inner tub 1 , the lifting rib 12 is opened with holes, and the centrifugal drainage structure is integrated inside the lifting rib 12 .

The washing machine further includes a box body 400 , which is composed of an upper panel 410 , a front panel 430 , a back panel and a bottom panel 420 . Bottom feet 421 are fixedly installed on the bottom plate 420 for supporting the entire washing machine. The front panel 430 is provided with an opening for taking out clothes, and an openable/closable door 431 is installed.

The outer cylinder 2 and the inner cylinder 1 are coaxially disposed inside the box body 400, and the outer cylinder 2 has a central mounting hole in which the bearing structure is fixedly mounted. A drive shaft that is fastened to the inner cylinder 1 passes through the bearing structure and is connected to a driving motor, so that the inner cylinder 1 is driven to rotate by the driving motor. The drive shaft has a hollow structure and forms a water inlet channel that communicates with the interior of the inner barrel 1. The water inlet channel is communicated with the water inlet pipeline of the washing machine, and a dynamic seal is arranged between the two, thereby realizing the water inlet of the inner barrel 1. Features.

The electromagnetic heating module 300 includes an electromagnetic heating coil 310 for generating an alternating magnetic field after being energized. The current is input to the rectifier 330 or the driver 340, and finally converted into high-frequency alternating current, which is input into the electromagnetic heating coil 310, so that the electromagnetic heating coil 310 generates a high-frequency alternating magnetic field radiating outward. The high-frequency alternating magnetic field generated by the electromagnetic heating coil 310 is radiated to the inner cylinder 1 made of metal material, so that the inner cylinder 1 can generate eddy currents under the action of electromagnetic induction, and the eddy currents can overcome the internal resistance of the inner cylinder 1 to flow and complete the transfer of electrical energy to thermal energy. Converted to achieve self-heating of the inner tub 1, thereby heating the washing water therein.

In this embodiment, in order to prevent the outer cylinder 2 from being heated under the action of the electromagnetic heating module 300 , the outer cylinder 2 can be made of a material that is not excited by a magnetic field, such as plastic. of the alternating magnetic field. However, when the electromagnetic heating module 300 operates, the metal objects located within the coverage of the alternating magnetic field generated by the electromagnetic heating module 300 may be excited by the magnetic field and generate heat.

However, metal foreign matter may remain in the outer cylinder 2 due to various unexpected reasons. For example, during the assembly of the washing machine, the worker mistakenly left metal parts such as iron wires, screws and other metal objects between the inner tub 1 and the outer tub 2 . Or after the outer tub 2 is opened during the maintenance process of the washing machine, metal objects are accidentally left in the outer tub 2 . It is also possible that children insert metal toys from the gap between the cylinder openings of the inner cylinder 1 and the outer cylinder 2 during play. It is also possible that during the washing process of the clothes, the metal ornaments on the clothes fall off and remain between the inner tub 1 and the outer tub 2 after the water is drained.

Once there is a metal foreign body in the outer cylinder 2, it is possible that the electromagnetic heating module 300 will be excited by the magnetic field and heat up rapidly after the electromagnetic heating module 300 is turned on, and an abnormal high temperature environment will be locally generated in the outer cylinder 2, which may cause damage to the outer cylinder 2 or the electromagnetic heating module 300, or even cause damage to the outer cylinder 2 or the electromagnetic heating module 300. lead to serious safety incidents.

In order to solve this problem, the present embodiment provides a control method for the above washing machine. When the electromagnetic heating module 300 operates to make the inner tub 1 generate heat, the radiation area on the outer tub 2 is covered with water.

In the above solution, the radiation area is also the action range of the electromagnetic heating module 300 on the outer cylinder 2 . During the operation of the electromagnetic heating module 300, the radiation area of the alternating magnetic field on the outer cylinder 2 is covered by water, and then the inner and outer cylinders 2 in the radiation area can be in contact with water for heat exchange to achieve rapid heat dissipation. If there is metal foreign matter remaining in the outer cylinder 2, the metal foreign body is excited by the alternating magnetic field to self-generate, and the generated heat is transferred to the outer cylinder 2, and then can be dissipated into the water through the outer cylinder 2, so as to achieve rapid heat dissipation without causing When the metal foreign body heats up rapidly, an abnormally high temperature environment is formed in the outer cylinder 2 , which avoids the occurrence of safety accidents, and plays a heating protection role in the working process of the electromagnetic heating module 300 .

In a further solution of this embodiment, when the electromagnetic heating module 300 operates to make the inner cylinder 1 generate heat, the outer cylinder 2 has water inside, and the water in the outer cylinder 2 covers the inner surface of the radiation area on the outer cylinder 2 .

In the above scheme, the inner surface of the radiation area is covered by the outer cylinder 2 containing water, and the metal foreign matter existing in the outer cylinder 2 can be directly immersed in the water, so as to directly contact the surrounding water for heat exchange, so as to realize the protection of metal clothing. Rapid heat dissipation, which in turn plays a role in more effective and reliable heating.

In this embodiment, the electromagnetic heating module 300 is installed at the bottom area of the outer cylinder 2 , and the radiation area at least includes the projection area of the electromagnetic heating coil 310 of the electromagnetic heating module 300 at the bottom of the outer cylinder 2 . As shown in FIG. 3 , when the electromagnetic heating module 300 works to make the inner cylinder 1 generate heat, the amount of water in the outer cylinder 2 satisfies: the projection of the water surface in the outer cylinder 2 (shown by S in FIG. 3 ) to the bottom of the outer cylinder 2 covers the electromagnetic heating The projected area of the coil 310 on the bottom of the outer cylinder 2 .

The electromagnetic heating module 300 is installed at the bottom area of the outer tub 2, and heats the inner tub 1 from below, so that the alternating magnetic field generated by the electromagnetic heating module 300 is concentrated and radiated to the bottom area of the inner tub 1, that is, the area where the washing water is concentrated, so that it has a higher heating efficiency. And once there are metal foreign objects remaining in the outer cylinder 2, the metal foreign objects are likely to be concentrated on the inner side of the bottom area of the outer cylinder 2, so that the outer cylinder 2 is filled with water to soak the metal foreign objects during the operation of the electromagnetic heating module 300, thereby preventing the metal foreign objects from heating up rapidly effect is more pronounced.

In this embodiment, the washing machine is a drum washing machine, the electromagnetic heating module 300 is installed on the wall of the outer tub 2 , and the radiation area at least includes the projection area of the electromagnetic heating coil 310 of the electromagnetic heating module 300 on the wall of the outer tub 2 . When the electromagnetic heating module 300 operates to heat the inner cylinder 1 , the projection of the water surface in the outer cylinder 2 to the outer cylinder wall covers the projection area of the electromagnetic heating coil 310 on the outer cylinder 2 cylinder wall.

Specifically, the electromagnetic heating module 300 further includes a plastic casing 320, and the electromagnetic heating coil 310 is arranged inside the plastic casing 320, which can play a sealing and protective effect on the electromagnetic heating coil 310, and prevent the electromagnetic heating coil 310 from contacting water and causing a short circuit, thereby causing electromagnetic heating. The heating module 300 is damaged.

The electromagnetic heating module 300 in this embodiment is installed outside the outer cylinder 2, and the electromagnetic heating coil 310 is projected upward to form the projection area. When the electromagnetic heating module 300 operates to generate heat in the inner cylinder 1 , the projection of the water surface in the outer cylinder 2 on the inner wall of the outer cylinder 2 covers the projection area formed by the electromagnetic heating coil 310 .

The electromagnetic heating module 300 is installed on the outer side of the outer tub 2. During the operation of the washing machine, the electromagnetic heating module 300 is not in direct contact with the washing water, and the sealing performance of the plastic casing 320 is relatively low. A fixing portion 321 is provided on the plastic casing 320 , and the electromagnetic heating module 300 is installed and fixed on the outer cylinder 2 through the connection between the fixing portion 321 and the wall of the outer cylinder 2 .

Preferably, the amount of water in the outer cylinder 2 also satisfies that there is a certain interval between the water surface in the outer cylinder 2 and the outer surface of the cylinder wall of the inner cylinder 1 . In this way, when the electromagnetic heating module 300 heats the inner tub 1, the heat generated by the inner tub 1 can be transferred to the washing water inside the inner tub 1 as much as possible, and the heat diffused into the air around the inner tub 1 is very little. It is beneficial to improve the heating efficiency of washing water. However, if the inner tub 1 is in contact with the water in the outer tub 2, a large amount of heat will diffuse into the water outside the inner tub 1, resulting in a reduction in the heating rate of the washing water.

In this embodiment, in order to realize the purpose of holding water inside the outer tub 2 during the operation of the electromagnetic heating module 300 , the washing machine includes a water inlet device (not shown in the figure), and the water inlet device feeds water into the outer tub 2 Cover the radiation area.

In a specific implementation of this embodiment, the water inlet device includes:

The main water inlet pipe is used to connect to the external water source, and the water inlet valve is set on the main water inlet pipe;

the first water inlet pipe, the water inlet end of which is connected with the main water inlet pipe, and the water outlet end is connected to the inside of the outer cylinder 2;

The second water inlet pipe, the water inlet end of which is communicated with the main water inlet pipe, and the water outlet end is communicated with the interior of the inner cylinder 1;

The switching mechanism controls at least one of the first water inlet pipe and the second water inlet pipe to communicate with the general water inlet pipe.

If the washing machine runs a washing program with washing water heating function, the switching mechanism conducts the first water inlet pipe and the main water inlet pipe, opens the water inlet valve, and feeds water into the outer tub 2 to cover the radiation area. By controlling the switching mechanism to conduct the second water inlet pipe and the main water inlet pipe, and controlling the opening of the water inlet valve, the purpose of feeding water into the inner cylinder 1 can be achieved.

In detail, the water outlet end of the second water inlet pipe is connected to the detergent box 600 , and the detergent box 600 is connected with the water inlet channel in the drive shaft of the inner cylinder 1 through a pipeline to achieve the purpose of feeding water into the inner cylinder 1 .

In the above solution, only one water inlet valve is provided inside the washing machine, and the direction of the water inlet water flow is controlled by the action of the switching mechanism, which helps to simplify the water inlet structure inside the washing machine.

In order to control the water inflow in the outer cylinder 2 and ensure that the radiation area on the outer cylinder 2 is completely covered by water, this embodiment uses flow detection or water level detection to control the water inflow.

For example, the washing machine further includes a flow sensor for detecting the water intake amount of the water intake device. If the water inflow detected by the flow sensor reaches the preset water inflow, it is determined that the radiation area is covered by water.

Alternatively, the washing machine further includes a water level sensor for detecting the water level in the outer tub 2 . If the height of the water level detected by the water level sensor reaches the preset water level, it is determined that the radiation area is covered by water.

In the preferred solution of this embodiment, the amount of water in the outer cylinder 2 is controlled to just enough to completely cover the radiation area. Specifically, if the water intake detected by the flow sensor reaches the preset water intake, or the water level detected by the water level sensor reaches the preset water level, the water intake device stops feeding water into the outer tub 2 .

In this embodiment, controlling the amount of water in the outer cylinder 2 within a specific range is conducive to achieving the best effect. If the amount of water inflow is too small, the metal foreign objects may not be completely immersed in the water, or the water in the outer cylinder 2 may reach a high water temperature within a short period of time when the electromagnetic heating module 300 continues to work, which may cause the heating effect. Protection is limited. However, if the water intake is too large, a large part of the heat generated by the operation of the electromagnetic heating module 300 will be absorbed by the water in the outer tub 2 , thereby reducing the heating efficiency of the washing water in the inner tub 1 .

In the above solution, the real-time monitoring of the water inflow in the outer cylinder 2 is carried out by the flow sensor or the water level sensor during the water inflow process of the water inlet device, so that the actual water inflow can be accurately controlled to the expected water inflow, which not only avoids insufficient water inflow As a result, effective heating protection cannot be achieved, and it can also prevent the heating efficiency of the washing water in the inner tub 1 from being reduced due to excessive water intake.

In a further solution of this embodiment, a drain port is provided on the outer tub 2, and the washing machine further includes a drain device 500 connecting the drain port and the outside of the washing machine.

When the electromagnetic heating module 300 operates to generate heat in the inner tub 1, the drain device 500 is kept in a closed state, and the communication between the drain port and the outside of the washing machine is disconnected.

Specifically, from the time when the water inlet device starts to enter water until the electromagnetic heating module 300 is turned off, the drainage device 500 is always in a closed state, and the water in the outer cylinder 2 will not be discharged, which ensures that the metal foreign matter that may exist in the outer cylinder 2 is heated by the electromagnetic heating. The module 300 is always submerged in water during operation, so as to avoid abnormal high temperature environment in the outer cylinder 2 .

In a further solution of this embodiment, after the washing machine receives a signal for starting the washing program, if it is determined that the washing water heating function is turned on, water is fed into the outer tub 2 to cover the radiation area.

Specifically, a control panel 700 is provided on the top of the washing machine, and a user operates on the control panel 700 to set a washing program to be run by the washing machine. If the washing program set by the user includes the operation of heating the washing water, after receiving the signal to start the washing program, the water inlet device can be controlled to feed water into the outer tub 2, so that the metal foreign objects that may exist in the outer tub 2 are immersed. The operation of feeding water into the outer cylinder 2 can be completed before the electromagnetic heating module 300 starts to heat, for example, it can be performed before or at the same time as the water feeding into the inner cylinder 1, or it can be performed when the electromagnetic heating module 300 starts to heat. The initial stage is completed, for example, after the inner tube 1 is filled with water, the electromagnetic heating module 300 is activated and water is started to be fed into the outer tube 2 at the same time. All of the above methods can ensure that the metal foreign matter that may exist in the outer cylinder 2 can quickly dissipate heat, so as to avoid a rapid temperature rise in the outer cylinder 2 .

In this embodiment, during the operation of the electromagnetic heating module 300 , the outer cylinder 2 contains water to cover the radiation area of the alternating magnetic field, so that the metal foreign objects remaining in the outer cylinder 2 can be submerged by the water. When the metal foreign body is excited by the alternating magnetic field to generate heat, the heat generated can be diffused into the surrounding water to prevent the local environment in the outer cylinder 2 from heating up rapidly, thereby preventing safety accidents during the heating process. By setting the water inlet device to directly feed water into the outer cylinder 2, the structure is simple, and the water quantity control is relatively accurate, so that the water quantity in the outer cylinder 2 can be accurately controlled in the radiation area that just completely covers the alternating magnetic field on the outer cylinder 2, which not only ensures the The metal foreign objects that may be excited are completely submerged, which ensures effective heating protection, and at the same time avoids the reduction of the heating efficiency of the washing water in the inner tub 1 caused by excessive water inflow.

Embodiment 5

As shown in FIG. 17 , the difference from the fourth embodiment is that the electromagnetic heating module 300 is installed inside the outer cylinder 2 . Specifically, the bottom of the outer cylinder 2 is provided with an installation opening, and the electromagnetic heating module 300 is installed inside the outer cylinder 2 through the installation opening.

The control method of the washing machine in this embodiment is basically the same as that in the fourth embodiment. The water inlet device also feeds water into the outer tub 2, and then during the operation of the electromagnetic heating module 300, the water in the outer tub 2 covers the inner surface of the radiation area. , so as to immerse the metal foreign objects that may remain in the outer cylinder 2 in the water, avoid the abnormal heating of the metal foreign objects under the action of the electromagnetic heating module 300 and cause safety accidents, and realize the heating protection effect.

In the preferred solution of this embodiment, the amount of water in the outer cylinder 2 satisfies that the water surface in the outer cylinder 2 is not lower than the upper surface of the electromagnetic heating module 300 , preferably higher than the upper surface of the electromagnetic heating module 300 .

In the above solution, the electromagnetic heating module 300 is installed inside the bottom area of the outer cylinder 2 , and the metal foreign matter in the outer cylinder 2 may also remain on the upper surface of the electromagnetic heating module 300 . The amount of water in the outer cylinder 2 is controlled so that the water level in the outer cylinder 2 is not lower than the upper surface of the electromagnetic heating module 300, and the metal foreign matter remaining on the upper surface of the electromagnetic heating module 300 can also contact the water in the outer cylinder 2, and the water Realize heat dissipation and avoid rapid heating.

On the other hand, the electromagnetic heating module 300 can also be immersed in water, which is beneficial to realize the heat dissipation of the electromagnetic heating module 300 itself through the surrounding water, and avoid overheating failure during the operation of the electromagnetic heating module 300 .

In this embodiment, since the electromagnetic heating module 300 is in direct contact with water during operation and when the inner cylinder 1 drains water, the electromagnetic heating coil 310 is covered by the plastic casing 320, which effectively avoids the existence of the electromagnetic heating coil 310 and the water. contacts, thus avoiding short circuit failures.

In this embodiment, it is further preferred that there is a certain interval between the water surface in the outer cylinder 2 and the outer wall of the inner cylinder 1 to ensure that the inner cylinder 1 and the water in the outer cylinder 2 do not have contact, and prevent the inner cylinder 1 from being The heat spreads to the outside of the inner tub 1, reducing the heating efficiency of the washing water inside the inner tub 1.

The difference between this embodiment and the fourth embodiment is that the specific installation position of the electromagnetic heating module 300 is different. The same heating protection effect in . At the same time, the water in the outer cylinder 2 can also contact the electromagnetic heating module 300 installed in the outer cylinder 2 to enhance the heat dissipation rate of the electromagnetic heating module 300 .

Embodiment 6

This embodiment is a further limitation of the fifth embodiment above. An installation groove is provided on the cylinder wall of the outer cylinder, a concave structure is formed on the inner side of the cylinder wall, and the electromagnetic heating module is arranged in the installation groove.

In this embodiment, the radiation area of the alternating magnetic field on the outer cylinder is the groove bottom wall of the installation groove. When the inner cylinder generates heat when the electromagnetic heating module is working, the installation groove is filled with water, so that the radiation area of the alternating magnetic field can be covered by water.

In the above solution, since the installation groove forms a concave structure on the inner side of the cylinder wall, the incoming water in the outer cylinder can be collected in the installation groove, which is beneficial to achieve complete coverage of the radiation area with less water inflow.

Embodiment 7

The difference between this embodiment and the fifth embodiment is that a water storage box is arranged on the outer surface of the radiation area on the cylinder wall of the outer cylinder. When the electromagnetic heating module operates to make the inner cylinder heat, the water storage box is filled with water. , the water in the water storage box covers the outer surface of the radiation area on the wall of the outer cylinder.

In this embodiment, although the metal foreign matter remaining in the outer cylinder does not directly contact water for heat exchange, when it is excited by the electromagnetic heating module to generate heat, the heat generated can also be transferred to the water storage box through the cylinder wall of the outer cylinder water within. In other words, since the wall of the outer cylinder is in direct contact with the water, rapid heat dissipation can be achieved, so that the local rapid temperature rise of the cylinder wall of the outer cylinder will not occur, thereby causing the structure of the outer cylinder to be damaged.

Embodiment 8

The difference between this embodiment and the fourth embodiment above is that the washing machine is a pulsator washing machine, and the electromagnetic heating module is installed on the bottom of the outer cylinder. When the electromagnetic heating module operates to heat the inner cylinder, the projection of the water in the outer cylinder to the bottom of the outer cylinder covers the projection area of the coil on the bottom of the outer cylinder.

Specifically, the electromagnetic heating module can be installed inside the outer cylinder, and water is fed into the outer cylinder of the water inlet device until the electromagnetic heating module is completely immersed in the water. While preventing the metal foreign matter in the outer cylinder from being rapidly heated up by the electromagnetic heating module, it can also assist the electromagnetic heating module to dissipate heat and improve the working stability of the electromagnetic heating module.

The electromagnetic heating module can also be installed outside the outer cylinder, that is, arranged below the outer cylinder. At this time, the water inlet device feeds water between the inner cylinder and the outer cylinder until the bottom of the outer cylinder is completely covered, and there is a certain interval between the water surface and the bottom of the inner cylinder.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims

A washing machine, the washing machine is a drum washing machine, comprising an outer cylinder and an inner cylinder, the inner cylinder is arranged in the outer cylinder, and can independently hold washing water during washing; electromagnetic heating for heating the inner cylinder is arranged in the outer cylinder The module, characterized in that the outer cylinder comprises a side wall and a bottom wall, and the side wall has a mounting groove extending along the axis of the outer cylinder;

One end of the installation slot extends to the bottom wall of the outer cylinder, and the bottom wall defines an installation opening corresponding to the end of the installation slot; the electromagnetic heating module is installed in the installation slot through the installation opening.
The washing machine according to claim 1, wherein the electromagnetic heating module comprises an electromagnetic heating coil and a plastic casing covering the electromagnetic heating coil, the plastic casing extending along the axis of the outer cylinder with a certain length, and one end extend into the installation slot through the installation opening, and the other end is located outside the installation opening;

The electromagnetic heating coil is connected to a connection terminal, and the connection terminal protrudes from the end of the plastic casing outside the installation opening.
The washing machine according to claim 2, wherein the plastic-encapsulated housing comprises a housing body and a mounting seat, the housing body is disposed in the mounting groove, and the mounting seat partially passes through the mounting opening; the The connection terminal is protruded from the mounting seat.
The washing machine according to claim 3, wherein the mounting seat comprises a plug portion that is plugged into the mounting port, and the housing body is inserted into an end of the plug portion extending into the mounting port;

The other end of the plug-in portion is provided with a limiting boss, and the limiting boss abuts against the bottom wall of the outer cylinder at the outer side of the installation opening.
The washing machine according to claim 4, characterized in that, the side wall of the plug-in portion is provided with a sealing member which is in interference fit with the installation port, the plug-in portion is inserted into the installation port, and the sealing member Block the mounting port.
The washing machine according to any one of claims 2-5, wherein a bracket for supporting the electromagnetic heating module is provided in the installation slot, and the bracket extends into the inner wall of the installation slot and the plastic casing respectively Partial connection of the mounting slot;

Preferably, two sides of the plastic-encapsulated casing have insertion grooves extending along the axis of the outer cylinder, the bracket is fixedly connected to the inner wall of the installation groove, and inserted into the insertion grooves from the suspended end of the plastic-encapsulated casing;

Preferably, the bracket is made of plastic material.
The washing machine according to any one of claims 2-5, wherein the electromagnetic heating module further comprises a support portion disposed on the suspended end of the plastic-encapsulated casing, and the support portion is installed from the suspended end of the plastic-encapsulated casing to the installation The inner wall of the slot extends and is connected with the inner wall of the installation slot;

Preferably, the support portion is integrally formed with the plastic casing.
The washing machine according to any one of claims 1-7, wherein the electromagnetic heating module has an upper surface facing the inner tub, and the upper surface is coaxial with the side wall of the inner tub Arc face.
The washing machine according to any one of claims 1-8, characterized in that, a drain port communicated with a drain structure of the washing machine is provided on the installation groove.
The washing machine according to claim 9, wherein the water outlet is arranged on the bottom wall of the installation groove below the suspended end of the electromagnetic heating module.
A control method of a washing machine, the washing machine is a drum washing machine, comprising an outer cylinder and an inner cylinder, the inner cylinder is arranged in the outer cylinder, and can independently hold washing water during washing; the outer cylinder is provided for heating the inner cylinder The electromagnetic heating module;

It is characterized in that, during the process of heating the inner tub by the electromagnetic heating module, the washing machine determines whether the electromagnetic heating module is in a dry burning state according to the working parameters of the electromagnetic heating module and/or the environmental parameters around the electromagnetic heating module.
The method for controlling a washing machine according to claim 11, wherein a first temperature sensor is provided on the electromagnetic heating module, and in the process of heating the inner drum by the electromagnetic heating module, if the temperature detected by the first temperature sensor is higher than The first preset temperature T 1 determines that the electromagnetic heating module is in a dry burning state.
The control method of a washing machine according to claim 11, wherein the washing machine further comprises a second temperature sensor for detecting the temperature between the outer tub and the inner tub, and in the process of heating the inner tub by the electromagnetic heating module, if the The temperature detected by the second temperature sensor is higher than the second preset temperature T 2 , and it is determined that the electromagnetic heating module is in a dry burning state.
The control method of a washing machine according to claim 11, wherein in the process of heating the inner tub by the electromagnetic heating module, the washing machine monitors the output power of the electromagnetic heating module, and when the output power P of the electromagnetic heating module is greater than the set power P 0 , it is determined that the electromagnetic heating module is in a dry burning state.
The control method of the washing machine according to claim 14, wherein the 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 the output power P=I×U.
The method for controlling a washing machine according to any one of claims 11-15, wherein when it is determined that the electromagnetic heating module is in a dry-burning state, the electromagnetic heating module is controlled to stop heating.
The method for controlling a washing machine according to claim 16, wherein when it is determined that the electromagnetic heating module is in a dry burning state, the water inlet device of the washing machine is also controlled to feed water into the inner tub.
The control method of a washing machine according to claim 17, wherein when the water level in the inner tub reaches the first preset water level H1, the water inlet device is controlled to stop water inlet;

Preferably, when the water level in the inner cylinder reaches the second preset water level H 2 , the electromagnetic heating module is controlled to continue heating the inner cylinder; the setting of the second preset water level H 2 satisfies: H 2 <H 1 .
The control method of a washing machine according to claim 17 or 18, wherein after the water inlet device starts to feed water, if the inner tub is in a static state, the inner tub is controlled to rotate at a certain speed.
The control method of a washing machine according to any one of claims 17-19, wherein the inner drum is provided with a centrifugal drainage structure, and the centrifugal drainage structure can be opened when the inner drum reaches the drainage speed V row . drain;

When the water level in the inner cylinder reaches the third preset water level H3, the inner cylinder is controlled to rotate at the drainage speed V row to drain water into the outer cylinder, so that the electromagnetic heating module is at least partially immersed in water.
A control method for a washing machine, the washing machine comprising:

outer cylinder;

an inner cylinder, disposed in the outer cylinder, at least partially made of a metal material that can generate eddy currents in an alternating magnetic field;

The electromagnetic heating module is installed on the outer cylinder, and generates an alternating magnetic field radiating to the periphery to make the inner cylinder heat, and the alternating magnetic field forms a radiation area on the outer cylinder;

It is characterized in that when the electromagnetic heating module operates to make the inner cylinder generate heat, the radiation area on the outer cylinder is covered by water.
The method for controlling a washing machine according to claim 21, wherein when the electromagnetic heating module operates to generate heat in the inner tub, the outer tub has water inside, and the water in the outer tub covers the radiation area on the outer tub. The inner surface.
The control method of a washing machine according to claim 22, wherein the electromagnetic heating module comprises an electromagnetic heating coil for generating an alternating magnetic field after being energized; the electromagnetic heating module is installed in the bottom area of the outer cylinder, the The radiation area at least includes the projection area of the coil of the electromagnetic heating module on the bottom of the outer cylinder;

When the electromagnetic heating module works to heat the inner cylinder, the projection of the water in the outer cylinder to the bottom of the outer cylinder covers the projection area of the coil on the bottom of the outer cylinder;

Preferably, the washing machine is a front-loading washing machine, and the electromagnetic heating module is installed on the wall of the outer cylinder; when the electromagnetic heating module operates to heat the inner cylinder, the projection of the water in the outer cylinder to the wall of the outer cylinder covers the The projected area of the coil on the outer cylinder wall;

Alternatively, the washing machine is a pulsator washing machine, and the electromagnetic heating module is installed on the bottom of the outer cylinder; when the electromagnetic heating module operates to heat the inner cylinder, the projection of the water in the outer cylinder to the bottom of the outer cylinder covers the The projected area of the coil on the bottom of the outer cylinder.
The control method of a washing machine according to claim 23, wherein the electromagnetic heating module is installed on the outer side of the outer cylinder, and the coil is projected upward to form the projection area; when the electromagnetic heating module operates to make the inner cylinder heat, the outer The projection of the water surface in the cylinder on the inner wall of the outer cylinder covers the projection area formed by the coil.
The control method of a washing machine according to claim 23, wherein the electromagnetic heating module is installed inside the outer tub, and the water surface in the outer tub is not lower than the upper surface of the electromagnetic heating module;

Preferably, there is a certain interval between the water surface in the outer cylinder and the outer wall of the inner cylinder.
The control method for a washing machine according to any one of claims 22 to 25, wherein the washing machine includes a water inlet device, and the water inlet device feeds water into an outer tub to cover the radiation area.
The method for controlling a washing machine according to claim 22, wherein the washing machine further comprises a flow sensor for detecting the water inflow of the water inlet device; if the water inflow detected by the flow sensor reaches a preset water inflow, it is judged that the The radiation area is covered by water in the outer cylinder;

Alternatively, the washing machine further includes a water level sensor for detecting the water level in the outer tub; if the water level detected by the water level sensor reaches a preset water level, it is determined that the radiation area is covered by the water in the outer tub;

Preferably, if the water inflow detected by the flow sensor reaches the preset water inflow, the water inflow device stops water inflow into the outer cylinder;

Or, if the height of the water level detected by the water level sensor reaches the preset water level, the water feeding device stops feeding water into the outer cylinder.
The control method of a washing machine according to any one of claims 22 to 27, wherein a drain port is provided on the outer tub, and the washing machine further comprises a drain device connecting the drain port and the outside of the washing machine;

When the electromagnetic heating module works so that the inner cylinder is heated, the drainage device is kept in a closed state, and the communication between the drainage port and the outside of the washing machine is disconnected.
The method for controlling a washing machine according to any one of claims 22 to 28, wherein after the washing machine receives a signal for starting a washing program, if it is judged that the washing water heating function is turned on, water is fed into the outer tub to cover the radiation area.
The control method of a washing machine according to claim 21 or 22, wherein the washing machine is a drum washing machine, and the electromagnetic heating module is arranged at the lower part of the outer tub;

Before the electromagnetic heating module starts to heat the inner cylinder, or during the heating of the inner cylinder by the electromagnetic heating module, 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.
The control method of a washing machine according to claim 30, wherein the inner cylinder is provided with a centrifugal drainage structure, and the centrifugal drainage structure can be opened to drain when the inner cylinder reaches the drainage speed V row ;

Before the electromagnetic heating module starts to heat the inner cylinder, or during the process of heating the inner cylinder by the electromagnetic heating module, the inner cylinder is controlled to rotate at the drainage speed V to drain water into the outer cylinder.
The method for controlling a washing machine according to claim 31, wherein after the washing machine receives an instruction to activate the electromagnetic heating module, the washing machine controls the inner tub to rotate at the drainage speed V row to drain water into the outer tub;

Preferably, the washing machine receives an instruction to activate the electromagnetic heating module, and after a first preset time period t1 , controls the inner tub to rotate to drain water into the outer tub;

More preferably, the washing machine determines the first preset time period t 1 according to the set washing water heating temperature.
The method for controlling a washing machine according to claim 31, wherein a first temperature sensor is provided on the electromagnetic heating module, and when the temperature detected by the first temperature sensor is higher than the third preset temperature T3, Control the inner cylinder to rotate at the drainage speed V row to drain water into the outer cylinder;

And/or, the outer cylinder is provided with a second temperature sensor for detecting the temperature between the inner cylinder and the outer cylinder, when the temperature detected by the second temperature sensor is higher than the fourth preset temperature T4, control The inner cylinder rotates at the drainage speed V row to drain water into the outer cylinder.
The control method of a washing machine according to claim 31, wherein the washing machine has a washing water heating program, and after receiving an instruction to run the washing water heating program, the washing machine is in the process of washing water or when the washing is completed. Afterwards, the inner cylinder is controlled to rotate at the drainage speed V row to drain water into the outer cylinder.
The method for controlling a washing machine according to any one of claims 31 to 34, wherein the washing machine controls the inner tub to continuously rotate for a second preset time period t2 at the drainage speed V row to drain water;

Alternatively, the washing machine is provided with a water level detection device for detecting the water level in the outer tub, and when the water level detected by the water level detection device reaches a preset water level, the inner tub is controlled to reduce the rotational speed.
The control method of a washing machine according to any one of claims 30-35, wherein a drain port is provided on the outer tub, and the washing machine further comprises a drain device that communicates the drain port with the outside of the washing machine;

The control drain device is kept closed during the process of draining the inner tub to the outer tub, and the communication between the drain outlet and the outside of the washing machine is disconnected.
A washing machine, comprising an outer cylinder and an inner cylinder, the inner cylinder is arranged in the outer cylinder and has a washing chamber independently containing washing water; an electromagnetic heating module for heating the inner cylinder is arranged in the outer cylinder, and it is characterized in that , the electromagnetic heating module has a heat dissipation structure;

The washing machine preferably adopts the control method of the washing machine according to any one of claims 21-36.
The washing machine according to claim 37, wherein the electromagnetic heating module has an upper surface facing the inner tub, and the heat dissipation structure comprises a heat dissipation hole disposed on the upper surface.
The front-loading washing machine according to claim 38, wherein the electromagnetic heating module comprises an electromagnetic heating coil and a plastic-encapsulated casing covering the electromagnetic heating coil, the plastic-encapsulated casing having an upper surface facing the inner tub and a surface opposite to the inner tub. the lower surface opposite the upper surface;

A first opening is provided on the upper surface of the plastic-encapsulated casing, a second opening is arranged on the lower surface of the plastic-encapsulated casing corresponding to the first opening, and the plastic-encapsulated casing extends from the first opening to the second opening in a direction away from the inner cylinder, A heat dissipation hole is formed through the electromagnetic heating module.