CN114481566A - Drum washing machine - Google Patents

Abstract

The invention belongs to the technical field of washing machines, and discloses a drum washing machine, which comprises an outer drum and an inner drum, wherein the inner drum is arranged in the outer drum and can independently contain washing water during washing; an electromagnetic heating module for heating the inner barrel is arranged in the outer barrel, the outer barrel comprises a side wall and a bottom wall, and the side wall is provided with a mounting groove extending along the axis of the outer barrel; one end of the mounting groove extends to the bottom wall of the outer barrel, and a mounting opening is formed in the end part, corresponding to the mounting groove, of the bottom wall; the electromagnetic heating module penetrates through the mounting opening to be mounted in the mounting groove. The electromagnetic heating module is arranged, so that the washing water in the inner barrel is heated under the condition that no water exists between the inner barrel and the outer barrel, and the electromagnetic heating module penetrates through the mounting opening formed in the bottom wall of the outer barrel and is mounted in the mounting groove, so that the electromagnetic heating module is simple to assemble and easy to realize.

Description

A drum washing machine

technical field

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

Background technique

The existing drum washing machine generally includes an inner tub and an outer tub, and a plurality of dewatering holes are arranged 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 will partially 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. How to realize the assembly of the electromagnetic heating module and the outer cylinder has become a problem to be solved.

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 drum washing machine with an electromagnetic heating module.

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

A drum washing machine includes an outer tub and an inner tub, the inner tub is arranged in the outer tub, and can independently hold washing water during washing; an electromagnetic heating module for heating the inner tub is arranged in the outer tub, and the outer tub comprising a side wall and a bottom wall, 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 drainage port communicating with the drainage structure of the drum 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.

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

In the drum 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.

In the present invention, a mounting seat is provided on the plastic-encapsulated shell of the electromagnetic heating module for the installation opening, and the wiring terminal passes through the bottom wall of the outer cylinder from the mounting seat, so as to realize the connection with the power supply line of the drum washing machine. 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.

In the present invention, the bracket or the support part is provided to realize the support for the part of the electromagnetic heating module inserted into the installation slot, so that the electromagnetic heating module is more stably installed in the installation slot, and the suspended end of the electromagnetic heating module is prevented from falling.

In the present invention, the upper surface of the electromagnetic heating module is set as a circular arc surface coaxial with the side wall of the inner cylinder, so that the distances between the upper surface of the electromagnetic heating module and the side wall of the inner cylinder are equal, and the inner cylinder is further The side walls are heated evenly.

In the present invention, a drainage port is provided on the installation groove to communicate with the drainage structure of the drum washing machine, so as to prevent the residual washing water in the installation groove.

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 drum washing machine in an embodiment of the present invention;

Fig. 2 is the front structure schematic diagram of the drum washing machine in the embodiment of the present invention;

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

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

5 is an exploded view of the drum washing machine in the embodiment of the present invention;

6 is a schematic side view of a drum washing machine according to an embodiment of the present invention;

Fig. 7 is the B-B plane schematic diagram 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;

In the figure: 1. Inner cylinder; 2. Outer cylinder; 3. Power supply line; 11. Drainage hole; 100, Electromagnetic heating module; 110, Shell body; 111, Heat dissipation hole; 121, plug-in part; 122, limit boss; 123, seal; 130, terminal; 210, side wall; 211, installation slot; 212, bracket; 213, limit part; 220, bottom wall; 221, installation port.

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 orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship 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, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present 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, and 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 100 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 211 , and is connected to the inner wall of the installation groove 211 . Inner wall connection.

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

In the above solution, the support portion also plays a role of supporting the suspended end of the electromagnetic heating module 100 , which ensures the stability of the electromagnetic heating module 100 being installed in the installation slot 211 . The support portion is integrally formed with the shell body 110 of the plastic-encapsulated shell, and there is no need to separately provide parts for supporting the electromagnetic heating module, and the structure is simpler. When installing the electromagnetic heating module, insert the mounting seat 120 into the mounting opening 221 from the outside of the bottom wall 220 , and then insert the housing body 110 provided with the support portion into the inserting portion 121 of the mounting seat 120 from the inside of the mounting opening 221 to heat the electromagnetic heating module. The coil is closed, and finally the wall and the bottom of the outer cylinder 2 are assembled together, that is, the assembly of the outer cylinder 2 and the electromagnetic heating module 100 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

As shown in FIG. 1 , this embodiment provides a control method for a drum washing machine according to the first embodiment. Before the electromagnetic heating module 100 starts to heat the inner cylinder, or during the heating of the inner cylinder by the electromagnetic heating module 100, the inner cylinder 1 is controlled to drain water into the outer cylinder 2, so that the electromagnetic heating module 100 is at least partially immersed in water.

Specifically, 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:

Scheme 1, 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 after a first preset time period T1, controls the inner tub ₁ to rotate to drain water into the outer tub 2;

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

Option 2, the electromagnetic heating module 100 is provided with a first temperature sensor, and when the temperature detected by the first temperature sensor is higher than the first preset temperature, the inner cylinder 1 is controlled to rotate at the _drainage speed V to the outer cylinder. 2 medium drains;

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 second preset temperature, the inner cylinder 1 is controlled Drain water in the outer cylinder 2 by rotating at the drainage speed V _row ;

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.

Option 3, 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 rotate at the _drainage speed V during the process of washing water and drain water into the outer drum 2. , after the water inflow is completed, control the drum washing machine to run according to the set washing program to wash;

Alternatively, after the washing machine is finished, the drum washing machine first controls the inner drum 1 to rotate at the drainage speed V to _drain water into the outer drum 2, immerses the electromagnetic heating module 100 at least partially, and then controls the drum washing machine to run according to the set washing program to wash. ;

During the running process of the washing program, the drum washing machine controls the electromagnetic heating module 100 to start heating the inner tub 1 .

In the above solutions 1 and 2, after the electromagnetic heating module 100 starts to heat for a certain period of time or reaches a certain temperature, the inner cylinder 1 is controlled to rotate to drain water into the outer cylinder 2, so that the electromagnetic heating module 100 is not immersed in the washing process in the early stage of heating. in 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.

In the above-mentioned scheme 3, the inner drum 1 is controlled to rotate to drain water into the outer drum 2 during the water intake process before the washing starts or after the water intake is completed. During the washing process, there is no need to suspend the washing program in the middle to perform the operation of draining 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 duration T2 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 device 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 that pass through the upper and lower sides to increase the surface area of the electromagnetic heating module 100 , and the electromagnetic heating module 100 is increased by controlling the heat dissipation method of the inner cylinder 1 immersing the electromagnetic heating module 100 with water in the outer cylinder. The contact area 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. The washing water 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 3

As shown in FIG. 1 , this embodiment provides a control method for a drum washing machine according to the first embodiment. During the process of heating the inner drum by the electromagnetic heating module 100 , the drum washing machine determines 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 environmental parameters around the electromagnetic heating module 100 .

In the above solution, the drum washing machine can judge whether the electromagnetic heating module is in the dry burning state according to the working parameters of the electromagnetic heating module and/or the environmental parameters around the electromagnetic heating module, and the judgment of the occurrence of the dry burning state is accurate and timely, and then corresponding The feedback prevents the electromagnetic heating module from dry-burning and damaging the clothes in the inner tub, or the electromagnetic heating module overheating 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, 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, it is determined that the electromagnetic heating module 100 is dry. burnt state.

Option 2, 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 temperature detected by the second temperature sensor is higher than At the second set temperature, it is determined that the electromagnetic heating module 100 is in a dry burning state.

Solution 3: 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 tub 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 three solutions, 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 changes, it takes a certain time. Compared with the judgment lag phenomenon that may occur when using temperature as the judgment standard, the detection of dry burning is more timely and accurate, and the occurrence of misjudgment is reduced.

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 _H2 , the inner cylinder 1 is controlled to rotate at the drainage speed V to _drain water into the outer cylinder 2, so that the electromagnetic The heating module 100 is at least partially immersed in water.

In the above solution, by controlling the inner cylinder 1 to drain water into the outer cylinder 2 to submerge at least part of the electromagnetic heating module 100, so that the electromagnetic heating module 100 is in contact with water for heat exchange, the rapid cooling of the electromagnetic heating module 100 can be achieved, and electromagnetic heating can be prevented. The module 100 overheats for a long time and fails.

In this embodiment, in the process of heating the inner drum 1 by the electromagnetic heating module 100, the drum washing machine 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 When it is determined to be in the dry burning state, the electromagnetic heating module 100 is controlled to stop heating, which can timely and accurately detect the occurrence of the dry burning condition, so as to prevent the electromagnetic heating module 100 from continuing to dry and burn clothes 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.

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 (10)

1. A drum washing machine comprises an outer drum and an inner drum, wherein the inner drum is arranged in the outer drum and can independently contain washing water during washing; the electromagnetic heating device is characterized in that the outer cylinder comprises a side wall and a bottom wall, and the side wall is provided with an installation groove extending along the axis of the outer cylinder;

one end of the mounting groove extends to the bottom wall of the outer barrel, and a mounting opening is formed in the end part, corresponding to the mounting groove, of the bottom wall; the electromagnetic heating module penetrates through the mounting opening to be mounted in the mounting groove.

2. A drum washing machine as claimed in claim 1 wherein the electromagnetic heating module comprises an electromagnetic heating coil and a plastic casing covering the electromagnetic heating coil, the plastic casing extends along the axis of the outer drum to a certain length, one end of the plastic casing passes through the mounting opening and extends into the mounting groove, and the other end of the plastic casing is located outside the mounting opening;

the electromagnetic heating coil is connected with a wiring terminal, and the wiring terminal penetrates out of the end part of the plastic package shell, which is positioned outside the mounting port.

3. A drum washing machine according to claim 2, characterized in that the plastic casing comprises a casing body and a mounting seat, the casing body is arranged in the mounting groove, and the mounting seat partially passes through the mounting opening; the wiring terminal penetrates out of the mounting seat.

4. A drum washing machine according to claim 3, characterized in that the mounting seat comprises a plug-in part which is plugged with the mounting opening, and the shell body is inserted into one end of the plug-in part which extends into the mounting opening;

the other end of the inserting part is provided with a limiting boss, and the limiting boss is arranged on the outer side of the mounting opening and abutted against the bottom wall of the outer barrel.

5. A drum washing machine according to claim 4, characterized in that the side wall of the insertion part is provided with a sealing element which is matched with the mounting opening in an interference manner, the insertion part is inserted into the mounting opening, and the sealing element blocks the mounting opening.

6. A drum washing machine according to any one of claims 2-5, characterized in that a bracket for supporting the electromagnetic heating module is arranged in the mounting groove, and the bracket is respectively connected with the inner wall of the mounting groove and the part of the plastic packaging shell extending into the mounting groove;

preferably, the two sides of the plastic package shell are provided with insertion grooves extending along the axis of the outer cylinder, the support is fixedly connected with the inner wall of the mounting groove, and the support is inserted into the insertion grooves from the suspended end of the plastic package shell;

preferably, the bracket is made of a plastic material.

7. The drum washing machine according to any one of claims 2-5, characterized in that the electromagnetic heating module further comprises a support part arranged at the free end of the plastic package casing, the support part extends from the free end of the plastic package casing to the inner wall of the mounting groove and is connected with the inner wall of the mounting groove;

preferably, the support part and the plastic package housing are integrally formed.

8. A drum washing machine according to any one of claims 1-7 characterized in that the electromagnetic heating module has an upper surface facing the inner drum, the upper surface being a circular arc surface coaxial with the sidewall of the inner drum.

9. A drum washing machine according to any one of claims 1-8, characterized in that the mounting groove is provided with a drain opening communicating with a drain structure of the drum washing machine.

10. A drum washing machine according to claim 9, characterized in that the drain opening is provided on the bottom wall of the mounting groove below the free end of the electromagnetic heating module.

Images