CN114481526A - Control method of drum washing machine and drum washing machine - Google Patents

Abstract

The invention belongs to the technical field of washing machines, and discloses a control method of a roller washing machine and the roller washing machine, wherein the roller washing machine comprises an outer cylinder and an inner cylinder, the inner cylinder is arranged in the outer cylinder, and washing water can be independently contained during washing; the lower part of the outer cylinder is provided with an electromagnetic heating module for heating the inner cylinder; before the electromagnetic heating module starts to heat the inner cylinder or in the process of heating the inner cylinder by the electromagnetic heating module, controlling the inner cylinder to drain water into the outer cylinder so that the electromagnetic heating module is at least partially immersed in water. The drum washing machine provided by the invention has the advantages that at least part of the electromagnetic heating module is immersed in the drained water of the outer drum, so that the electromagnetic heating module can be in contact with the surrounding washing water to perform heat exchange, the heat dissipation of the electromagnetic heating module is further realized, the heat dissipation effect is good, and the electromagnetic heating module is prevented from being in fault due to overheating in the working process.

Description

Control method of drum washing machine and drum washing machine

Technical Field

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

Background

The existing drum washing machine generally comprises an inner drum and an outer drum, wherein a plurality of dewatering holes are arranged on the wall of the inner drum. However, in the washing process, the washing water between the inner tub and the outer tub is not used, resulting in a waste of the washing water. Meanwhile, the dirt generated in the washing process can be partially remained between the inner barrel and the outer barrel and is difficult to clean, and the long-term accumulation can cause pollution to the washing water and influence the washing effect.

In order to solve the above problems, the prior art provides a washing machine without dewatering holes on the inner barrel, so that the inner barrel can independently contain washing water in the washing process, the condition of water storage between the inner barrel and the outer barrel in the washing process can be avoided, the using amount of the washing water is saved, and the condition of dirt accumulation between the inner barrel and the outer barrel is also avoided to a great extent.

However, since there is no water between the inner and outer drums during the washing process, the washing water cannot be heated in the form of a heating pipe provided in the outer drum in the conventional washing machine. In order to solve the problem that the washing machine without dewatering holes on the inner drum heats the washing water, the Chinese patent with application number 201811191414.1 discloses a drum washing machine, which comprises a nonporous drum which is arranged in a shell and does not have dewatering holes, the side wall of the nonporous drum is provided with a clothes input opening, and the drum is provided with a door body which can turn over to open and close the clothes input opening; the outer cylinder is sleeved outside the roller, and an electromagnetic heating module is arranged on the outer cylinder to heat the inside of the outer cylinder and transfer the heating heat to the washing water contained in the roller.

However, in the above solution, the temperature of the electromagnetic heating module itself is high during heating, and the efficiency of heat exchange between the electromagnetic heating module and air is low, and it is difficult to achieve effective heat dissipation only by the air flow around the electromagnetic heating module. And the excessive temperature can cause the electromagnetic heating module to be heated and to be out of order, thereby influencing the use. On the other hand, since the electromagnetic heating module is disposed in the outer tub, the washing water discharged from the inner tub may submerge the electromagnetic heating device, and there is a possibility that lint carried in the washing water may remain on the surface of the electromagnetic heating module. If the effective heat dissipation of electromagnetic heating module can not be realized, the burning of remaining thread scraps can still be caused to the too high temperature in electromagnetic heating module surface, and then causes bigger potential safety hazard. Therefore, how to realize the effective heat dissipation of the electromagnetic heating module becomes an urgent problem to be solved.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a control method of a drum washing machine and the drum washing machine.

In order to solve the technical problems, the invention adopts the technical scheme that:

a control method of a roller washing machine comprises an outer barrel and an inner barrel, wherein the inner barrel is arranged in the outer barrel and can independently contain washing water during washing; the lower part of the outer cylinder is provided with an electromagnetic heating module for heating the inner cylinder;

before the electromagnetic heating module starts to heat the inner cylinder or in the process of heating the inner cylinder by the electromagnetic heating module, controlling the inner cylinder to drain water into the outer cylinder so that the electromagnetic heating module is at least partially immersed in water.

Furthermore, a centrifugal drainage structure is arranged on the inner barrel and can reach a drainage rotating speed V on the inner barrel_{Row board}When the water is drained, the water tank is opened for draining;

before the electromagnetic heating module starts to heat the inner cylinder or in the process of heating the inner cylinder by the electromagnetic heating module,controlling the inner cylinder to discharge water at a rotational speed V_{Row board}The rotation of the water pump discharges water into the outer cylinder.

Further, after the roller washing machine receives an instruction for starting the electromagnetic heating module, the inner barrel is controlled to drain water at a rotating speed V_{Row board}Rotating to drain water into the outer cylinder;

preferably, the drum washing machine receives an instruction for starting the electromagnetic heating module, and the instruction passes through a first preset time length T₁Then, controlling the inner cylinder to rotate and drain water into the outer cylinder;

more preferably, the drum washing machine determines the first preset time period T according to a set heating temperature of the washing water₁。

Further, a first temperature sensor is arranged on the electromagnetic heating module, and when the temperature detected by the first temperature sensor is higher than a first preset temperature, the inner cylinder is controlled to drain water at a rotating speed V_{Row board}Rotating to drain water into the outer cylinder;

and/or a second temperature sensor for detecting the temperature between the inner cylinder and the outer cylinder is arranged in the outer cylinder, and when the temperature detected by the second temperature sensor is higher than a second preset temperature, the inner cylinder is controlled to drain the water at a rotating speed V_{Row board}The rotation of the water pump discharges water into the outer cylinder.

Furthermore, the drum washing machine is provided with a washing water heating program, and after receiving an instruction for operating the washing water heating program, the drum washing machine controls the inner drum to discharge water at a rotating speed V in the washing water inlet process or after the washing water inlet is finished_{Row board}The rotation is carried out to discharge water into the outer cylinder.

Further, the drum washing machine controls the inner drum to drain the water at the rotating speed V_{Row board}Continuously rotating for a second preset time period T₂Draining;

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

Furthermore, a water outlet is arranged on the outer drum, and the drum washing machine further comprises a water drainage device communicated with the water outlet and the outside of the drum washing machine;

the control drainage device keeps closed in the process of draining water from the inner cylinder to the outer cylinder, and the communication between the drainage port and the outside of the drum washing machine is cut off.

Another object of the present invention is to provide a drum washing machine, comprising an outer drum and an inner drum, wherein the inner drum is arranged in the outer drum and is provided with a washing chamber for independently containing washing water; an electromagnetic heating module used for heating the inner barrel is arranged in the outer barrel, and the electromagnetic heating module is provided with a heat dissipation structure;

the drum washing machine preferably adopts the control method of the drum washing machine.

Further, the electromagnetic heating module is provided with an upper surface facing the inner barrel, and the heat dissipation structure comprises heat dissipation holes arranged on the upper surface.

Further, the electromagnetic heating module comprises an electromagnetic heating coil and a plastic package shell covering the electromagnetic heating coil, and the plastic package shell is provided with an upper surface facing the inner cylinder and a lower surface opposite to the upper surface;

the plastic package heating module comprises an inner barrel, a plastic package shell and a radiating hole, wherein the upper surface of the plastic package shell is provided with a first opening, the lower surface of the plastic package shell is provided with a second opening corresponding to the first opening, and the plastic package shell extends to the second opening from the first opening to the direction far away from the inner barrel to form the radiating hole penetrating through the electromagnetic heating module.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

The drum washing machine provided by the invention has the advantages that at least part of the electromagnetic heating module is immersed in the drained water of the outer drum, so that the electromagnetic heating module can be in contact with the surrounding washing water to perform heat exchange, the heat dissipation of the electromagnetic heating module is further realized, the heat dissipation effect is good, and the electromagnetic heating module is prevented from being in fault due to overheating in the working process.

The drum washing machine controls the electromagnetic heating module to start heating after receiving the instruction of starting the electromagnetic heating module, and the first preset time length T is passed₁Then the inner cylinder is controlled to rotate to drain water into the outer cylinder, or the inner cylinder is controlled to drain water into the outer cylinder by arranging a temperature sensor, so that the electromagnetic heating module can be immersed when the temperature of the electromagnetic heating module or the ambient temperature of the electromagnetic heating module reaches a set valueThe bubble electromagnetic heating module dissipates heat, so that the electromagnetic heating module is not soaked in the earlier heating period, and the influence on the heating efficiency of the washing water in the earlier heating period is avoided.

After receiving an instruction of operating a washing water heating program, the drum washing machine judges that an electromagnetic heating module needs to be started to heat the inner drum in the subsequent washing process, controls the inner drum to rotate to drain water into the outer drum in the water inlet process or after the water inlet is finished, finishes the operation of immersing the electromagnetic heating module before the clothes are washed, and avoids the influence on the washing effect of the clothes caused by changing the rotating speed of the inner drum in the washing process.

The roller washing machine is combined with a mode of immersing the electromagnetic heating module by using washing water for heat dissipation by arranging the heat dissipation structure on the electromagnetic heating module, so that the heat dissipation efficiency of the electromagnetic heating module is further improved. The radiating holes which are arranged to penetrate through the upper surface and the lower surface of the electromagnetic heating module are arranged on the radiating structure, so that the contact area between the electromagnetic heating module and the surrounding air and washing water is increased, and the radiating efficiency is further improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural view of a drum washing machine according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a control method of the drum washing machine according to an embodiment of the present invention;

FIG. 3 is a flowchart of a control method of a drum washing machine according to a second embodiment of the present invention;

FIG. 4 is a flowchart of a control method of a drum washing machine according to a third embodiment of the present invention;

FIG. 5 is a flow chart illustrating another control method of the drum washing machine according to the third embodiment of the present invention;

FIG. 6 is a schematic front view of a drum washing machine according to a fourth embodiment of the present invention;

FIG. 7 is a schematic view of the invention taken along the line A-A of FIG. 6;

FIG. 8 is a schematic structural view of an electromagnetic heating module in a fourth embodiment of the present invention;

fig. 9 is an exploded view of a drum washing machine in accordance with a fourth embodiment of the present invention;

FIG. 10 is a schematic side view of a drum washing machine according to a fourth embodiment of the present invention;

FIG. 11 is a schematic view of the invention taken along the line B-B of FIG. 10;

fig. 12 is an enlarged view of the structure of fig. 11 at C according to the present invention.

In the figure: 1. an inner barrel; 2. an outer cylinder; 3. a power supply line; 11. a drain hole; 100. an electromagnetic heating module; 110. a housing body; 111. heat dissipation holes; 112. inserting grooves; 120. a mounting seat; 121. a plug-in part; 122. a limiting boss; 123. a seal member; 130. a wiring terminal; 210. a side wall; 211. mounting grooves; 212. a support; 213. a limiting part; 220. a bottom wall; 221. and (7) installing the opening.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 for illustrating the present invention and 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", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1, the drum washing machine according to the present embodiment includes an outer tub 2 and an inner tub 1, and the inner tub 1 is disposed in the outer tub 2 and can independently contain washing water during washing.

In this embodiment, the wall of the inner cylinder 1 is not provided with dewatering holes, and is in a closed state in the washing process, and can independently contain washing water. The wall of the inner cylinder 1 is provided with a drain hole 11, and the drain hole 11 is blocked by a sealing component in the washing process.

There are various ways to achieve the drainage of the inner tub 1. In one scheme, a jacking component is arranged at a specific position of an outer cylinder 2, the inner cylinder 1 is controlled to rotate to a position corresponding to the jacking component, and the sealing component is operated to remove the blockage of the drainage hole 11 by the jacking component, so that the drainage of washing water is realized.

In another scheme, a centrifugal component is arranged in the inner cylinder 1, and when the inner cylinder 1 reaches a certain rotating speed, the centrifugal component can move under the action of centrifugal force to further drive the sealing component to move, so that the drain hole 11 is opened, and the washing water is drained.

In the present embodiment, an electromagnetic heating module 100 for heating the inner cylinder 1 is provided at the lower part of the outer cylinder 2. The inner cylinder 1 has a cylinder wall made of a metal material and generates an eddy current effect by receiving a magnetic field generated by the electromagnetic heating module 100 to generate heat, and the outer cylinder 2 is made of a plastic material which does not excite the eddy current effect in the magnetic field. The electromagnetic heating module 100 is preferably provided at the lowest position inside the outer tub 2.

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

In the above scheme, by controlling the inner cylinder 1 to drain water into the outer cylinder 2, the drained washing water is collected to the bottom of the outer cylinder 2, and at least part of the electromagnetic heating module 100 is immersed, so that the electromagnetic heating module 100 can be in contact with the surrounding washing water to perform heat exchange, and further the heat dissipation of the electromagnetic heating module 100 is realized, the heat dissipation effect is good, and the electromagnetic heating module 100 is prevented from being out of order due to overheating in the working process.

In this embodiment, a centrifugal drainage structure (not shown) is provided on the inner cylinder 1, and the centrifugal drainage structure can reach a drainage rotation speed V in the inner cylinder_{Row board}The drain hole 11 is opened to drain water.

In an implementation mode of this embodiment, the lifting rib is installed at the position corresponding to the drain hole 11 on the wall of the inner cylinder 1, a hole is opened on the shell of the lifting rib, a centrifugal drainage structure is integrally arranged in the lifting rib, the initial state of the centrifugal drainage structure is a plugging state, the inner cylinder 1 is kept sealed and independently holds washing water, and the centrifugal drainage structure can be opened under the action of centrifugal force, so that the washing water can be discharged through the drain hole 11.

Specifically, the centrifugal drainage structure comprises a sealing plunger capable of reciprocating and an elastic piece for elastically restoring the sealing plunger, wherein the sealing plunger can reciprocate to open or close the drainage hole 11. The sealing plunger is connected with a balancing weight through a lever, when the rotating speed of the inner barrel 1 reaches the water drainage rotating speed, the matching block moves towards the direction far away from the axis of the inner barrel 1 under the action of centrifugal force to drive the sealing plunger to move towards the direction close to the axis of the inner barrel 1 to open the drain hole 11, when the rotating speed of the inner barrel 1 is low or does not rotate, the elastic part pushes the sealing plunger to move towards the direction far away from the axis of the inner barrel 1 to plug the drain hole 11, and the sealing of the inner barrel 1 is realized.

Before the electromagnetic heating module 100 starts to heat the inner cylinder 1 or in the process of heating the inner cylinder 1 by the electromagnetic heating module 100, controlling the inner cylinder 1 to discharge water at a rotating speed V_{Row board}Rotating outer cylinder2, draining water.

In the present embodiment, the inner cylinder 1 is controlled to rotate to the outer cylinder 2 to discharge water in the process of heating the inner cylinder 1 by the electromagnetic heating module 100.

As shown in fig. 1 and 2, in a further embodiment of the present invention, after the drum washing machine receives the command for starting the electromagnetic heating module 100, the drum washing machine controls the inner drum 1 to rotate at the drainage speed V_{Row board}The rotation drains water into the outer cylinder 2.

Preferably, the drum washing machine receives a command for starting the electromagnetic heating module 100, and passes through a first preset time period T₁Then, the inner cylinder 1 is controlled to rotate to discharge water into the outer cylinder 2.

More preferably, the drum washing machine determines the first preset time period T according to a set heating temperature of the washing water₁。

In the above scheme, after receiving the instruction for starting the electromagnetic heating module 100, the drum washing machine controls the electromagnetic heating module to start working, and heats the inner drum 1, preferably for a first preset time period T₁And then the inner cylinder is controlled to rotate to drain water into the outer cylinder, so that the electromagnetic heating module 100 is not immersed in the washing water in the heating early stage. So in the heating earlier stage, the heating efficiency of electromagnetic heating module 100 can not receive the influence that the washing water soaked, has guaranteed the intensification rate of heating washing water in earlier stage, can make the washing water reach the settlement temperature fast.

When the set heating temperature of the washing water is different, the heating efficiency of the electromagnetic heating module 100 is different, and the time required for reaching a higher temperature is different. In this embodiment, the drum washing machine determines the first preset time period T according to the set heating temperature of the washing water₁For different washing water heating temperature set values, the time intervals between the starting of the electromagnetic heating module 100 and the rotating and draining of the inner cylinder 1 are different, so that the temperatures of the electromagnetic heating module 100 when the electromagnetic heating module is immersed by the washing water are basically the same under the different washing water heating temperature set values.

In the present embodiment, the bottom of the outer tub 2 is provided with a mounting groove 211, and the electromagnetic heating module 100 is mounted in the mounting groove 211. Due to the recessed structure of the mounting groove 211, water discharged from the inner tub 1 can be collected into the mounting groove 211, so that immersion of the electromagnetic heating module 100 can be achieved with less washing water discharge.

In order to control the water discharge amount of the inner drum 1, in a further scheme of the embodiment, the inner drum 1 is controlled by the drum washing machine to discharge water at the rotating speed V_{Row board}Continuously rotating for a second preset time period T₂And draining water. The drainage time is controlled by controlling the rotation time of the inner cylinder 1, namely the drainage time, at a certain drainage rotating speed V_{Row board}The drainage rate of the lower drum washing machine is basically unchanged, so that the drainage quantity of the electromagnetic heating module 100 soaked by the drainage water of the inner drum 1 at each time can be controlled to be basically consistent.

In another embodiment of the present invention, a water level detecting device for detecting the water level in the outer tub 2 is disposed on the drum washing machine, and when the water level detected by the water level detecting device reaches a preset water level, the inner tub 1 is controlled to reduce the rotation speed.

In the scheme, the inner cylinder 1 is controlled to reduce the rotating speed until the centrifugal drainage structure blocks the drainage hole 11, or the inner cylinder 1 is directly controlled to stop rotating, so that the inner cylinder 1 can be controlled to stop draining. The water level in the outer cylinder 2 is detected by arranging a water level detection device to control the inner cylinder 1 to stop draining, so that the drainage amount of the inner cylinder 1 is kept consistent every time the electromagnetic heating module 100 is immersed for heat dissipation.

In this embodiment, the outer tub 2 is provided with a water outlet, and the drum washing machine further includes a water discharge device communicating the water outlet with the outside of the drum washing machine. Preferably, the drain port is disposed on the mounting groove 211, and the washing water collected in the mounting groove 211 can be directly drained through the drain port, thereby preventing the washing water from remaining in the mounting groove 211 after the drainage of the drainage device.

In order to ensure that the electromagnetic heating module 100 can be immersed by the washing water to realize heat dissipation in the process of heating the inner barrel 1, the drainage device is controlled to be kept closed in the process of draining the water from the inner barrel 1 into the outer barrel 2, and the communication between the drainage outlet and the outside of the drum washing machine is cut off, so that the drained washing water can be kept in the outer barrel 2 to immerse the electromagnetic heating module 100.

In this embodiment, in the process that the electromagnetic heating module 100 heats the inner cylinder 1, the inner cylinder 1 is controlled to rotate to drain water into the outer cylinder, so that at least part of the electromagnetic heating module 100 is immersed in the washing water, the washing water immersed in the electromagnetic heating module 100 can be used for realizing heat dissipation of the electromagnetic heating module 100, the heat dissipation effect is good, and faults caused by overheating in the working process of the electromagnetic heating module are prevented. The electromagnetic heating module 100 controls the inner barrel 1 to drain after starting heating, so that the heating efficiency in the early stage of heating is ensured, and the washing water can reach the set temperature quickly. By controlling the length of time for draining or setting a water level detection device, the amount of water drained by the immersion electromagnetic heating module 100 can be controlled, and the waste of washing water caused by excessive drainage is avoided.

Example two

As shown in fig. 1 and 3, the present embodiment is different from the first embodiment in that: the electromagnetic heating module 100 is provided with a first temperature sensor, and when the temperature detected by the first temperature sensor is higher than a first preset temperature, the inner cylinder 1 is controlled to drain water at a rotating speed V_{Row board}The rotation drains water into the outer cylinder 2.

Or, a second temperature sensor for detecting the temperature between the inner cylinder 1 and the outer cylinder 2 is arranged in the outer cylinder 2, and when the temperature detected by the second temperature sensor is higher than a second preset temperature, the inner cylinder 1 is controlled to drain the water at the rotating speed V_{Row board}The rotation drains water into the outer cylinder 2.

In this embodiment, the first temperature sensor and the second temperature sensor may be simultaneously disposed, and when the temperature detected by any one of the temperature sensors is higher than the corresponding preset temperature, the inner cylinder 1 is controlled to rotate at the drainage speed V_{Row board}The rotation drains water into the outer cylinder 2.

In the above scheme, a temperature sensor is arranged to detect the temperature of the electromagnetic heating module 100 and the surrounding temperature thereof, and when the detected temperature reaches a certain value, the inner cylinder 1 is controlled to rotate to discharge water into the outer cylinder 2, so that the electromagnetic heating module 100 is not immersed in the washing water in the early heating period. So in the heating earlier stage, the heating efficiency of electromagnetic heating module 100 can not receive the influence that the washing water soaked, has guaranteed the intensification rate of heating washing water in earlier stage, can make the washing water reach the settlement temperature fast. Meanwhile, the drainage of the inner barrel 1 is controlled directly by detecting the temperature, and the node control of the drainage of the inner barrel 1 is more accurate.

EXAMPLE III

As shown in fig. 1, the present embodiment is different from the first embodiment in that: before the electromagnetic heating module 100 starts to heat the inner cylinder 1, the inner cylinder 1 is controlled to drain water at a rotating speed V_{Row board}The rotation drains water into the outer cylinder 2.

Specifically, as shown in fig. 1 and 4, the drum washing machine has a washing water heating program, and when receiving an instruction to operate the washing water heating program, the drum washing machine controls the inner tub 1 to discharge the water at a discharge rotation speed V during the washing water intake process_{Row board}The water is drained from the outer cylinder 2 by rotation, and the drum washing machine is controlled to run according to a set washing program to wash after water is completely fed. The drum washing machine controls the electromagnetic heating module 100 to start to heat the inner drum 1 in the running process of the washing program.

Alternatively, as shown in fig. 1 and 5, after the drum washing machine receives the instruction for operating the washing water heating program, the inner tub 1 is controlled to rotate at the draining speed V after the washing water is completely filled_{Row board}The water is drained from the outer cylinder 2 by rotation, the electromagnetic heating module 100 is at least partially immersed, and then the drum washing machine is controlled to operate according to a set washing program for washing. The drum washing machine controls the electromagnetic heating module 100 to start to heat the inner drum 1 in the running process of the washing program.

In the above scheme, after receiving the instruction of operating the washing water heating program, the drum washing machine determines that the electromagnetic heating module 100 needs to be started to heat the inner drum 1 in the subsequent washing process. The operation of immersing the electromagnetic heating module 100 can be completed before the clothes are washed, so that the operation of draining water into the outer cylinder 2 is not required to be suspended in the middle of the subsequent washing process. Therefore, the condition that the washing effect of the clothes is influenced by changing the rotating speed of the inner barrel 1 in the washing process is avoided.

Example four

As shown in fig. 1, the present embodiment provides a drum washing machine, which includes an outer tub 2 and an inner tub 1, the inner tub 1 is disposed inside the outer tub 2 and has a washing chamber for independently containing washing water. An electromagnetic heating module 100 for heating the inner barrel 1 is arranged in the outer barrel 2, and the electromagnetic heating module 100 has a heat dissipation structure.

In a preferred aspect of this embodiment, the drum washing machine employs the control method of the drum washing machine described in any one of the first to third embodiments.

In this embodiment, the electromagnetic heating module 100 has a heat dissipation structure, and the heat dissipation of the electromagnetic heating module 100 can be realized by the heat dissipation structure. The combination with the mode of utilizing the washing water to immerse the electromagnetic heating module 100 for heat dissipation further improves the heat dissipation efficiency of the electromagnetic heating module 100 and avoids the overheating phenomenon in the working process of the electromagnetic heating module 100.

In a further aspect of the present embodiment, as shown in fig. 7 and 8, the electromagnetic heating module 100 has an upper surface facing the inner cylinder 1, and the heat dissipation structure includes heat dissipation holes 111 disposed on the upper surface.

In this embodiment, the electromagnetic heating module 100 is used for heating the inner cylinder 1, and during the heating process, the temperature of the upper surface is higher, and the heat dissipation holes 111 are arranged on the upper surface and used as a heat dissipation structure, so that a better heat dissipation effect is achieved.

Further, the electromagnetic heating module 100 includes an electromagnetic heating coil and a plastic package housing covering the electromagnetic heating coil, and the plastic package housing has an upper surface facing the inner cylinder 1 and a lower surface opposite to the upper surface.

The upper surface of the plastic package shell is provided with a first opening, the lower surface of the plastic package shell is provided with a second opening corresponding to the first opening, and the plastic package shell extends to the second opening from the first opening to the direction far away from the inner cylinder 1 to form a heat dissipation hole 111 penetrating through the electromagnetic heating module 100.

In the above solution, the contact area between the electromagnetic heating module 100 and the ambient air and the washing water is increased through the heat dissipation holes 111 penetrating vertically, so that the heat dissipation efficiency is further improved. The plastic package shell extends from the first opening to the second opening to form a heat dissipation hole 111, and the electromagnetic heating coil is sealed inside the plastic package shell.

In this embodiment, the electromagnetic heating module 100 has a heat dissipation structure, and is matched with the control method of the drum washing machine, so that the electromagnetic heating module 100 with the heat dissipation structure is immersed in the washing water in the process of heating the inner drum 1, and the heat dissipation efficiency of the electromagnetic heating module 100 is further improved. The heat dissipation structure is provided with the heat dissipation holes 111 penetrating through the upper surface and the lower surface of the electromagnetic heating module 100, so that the contact area between the electromagnetic heating module 100 and the surrounding air and washing water is increased, and the heat dissipation efficiency is further improved.

As shown in fig. 6 to 8, in a further aspect of the present embodiment, the outer cylinder 2 includes a side wall 210 and a bottom wall 220, and the mounting groove 211 is disposed on the side wall 210 and extends along an axis of the outer cylinder 2 with a certain length. One end of the mounting groove 211 extends to the bottom wall 220 of the outer cylinder 2, and the end of the bottom wall 220 corresponding to the mounting groove 211 is provided with a mounting opening 221. The electromagnetic heating module 100 is installed in the installation recess 211 through the installation opening 221.

In the above solution, the drum washing machine is provided with the mounting opening 221 on the bottom wall 220 of the outer tub 2, and the electromagnetic heating module 100 is mounted in the mounting groove 211 on the side wall 210 of the outer tub 2 through the mounting opening 221, so that the assembly is simple and easy to implement.

Further, the plastic envelope of the electromagnetic heating module 100 extends along the axis of the outer cylinder 2 to have a certain length, one end of the plastic envelope passes through the installation opening 221 and extends into the installation groove 211, and the other end of the plastic envelope is located outside the installation opening 221.

The electromagnetic heating coil is connected with the wiring terminal 130, and the wiring terminal 130 penetrates out of the end part of the plastic package shell, which is positioned outside the mounting port 221.

Further, the plastic casing includes a casing body 110 and a mounting seat 120, the casing body 110 is disposed in the mounting groove 211, a portion of the mounting seat 120 passes through the mounting opening 221, and the connection terminal 130 passes through the mounting seat 120 and is connected to the power supply line 3 of the drum washing machine.

In the above solution, the connection terminal 130 penetrates out from the right end of the mounting seat 120 to extend out of the mounting opening 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 heat the inner drum 1.

In this embodiment, the heat dissipation holes 111 are disposed on the housing body 110 and penetrate the upper and lower surfaces of the housing body 110.

The specific structure of the mounting base 120 in this embodiment is shown in fig. 8. The mounting seat 120 includes a plug portion 121 plugged with the mounting opening 221, and the housing body 110 is plugged into one end of the plug portion 121 extending into the mounting opening 221.

The other end of the insertion part 121 is provided with a limit boss 122, and the limit boss 122 is abutted against the bottom wall 220 of the outer cylinder 2 at the outer side of the mounting opening 221.

In the above scheme, the left end of the insertion part 121 is a hollow structure, and the housing body 110 is inserted into the left end of the insertion part 121, so that the electromagnetic heating coil is enclosed inside the plastic-sealed housing. The right end of the insertion part 121 is provided with the 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 mounting position of the electromagnetic heating module 100 is more accurate.

In a further scheme of this embodiment, a sealing member 123 in interference fit with the mounting opening 221 is provided on a side wall of the insertion part 121, the insertion part 121 is inserted into the mounting opening 221, and the sealing member 123 blocks the mounting opening 221.

In the above embodiment, the sealing member 123 is disposed on the right end peripheral side of the insertion part 121, and the sealing member 123 may be made of rubber and be in interference fit with the mounting opening 221. During the insertion of the socket 121 into the mounting opening 221, the seal 123 on the circumferential side of the socket 121 is gradually inserted into the mounting opening 221. When the stop boss 122 abuts the bottom wall 220, the sealing member 123 is fully inserted into the mounting opening 221. Because the sealing member 123 is in interference fit with the mounting port 221, the sealing member 123 plugs the mounting port 221 after entering the mounting port 221, and the risk of water leakage and electric leakage caused by water leakage at the mounting port 221 is avoided.

In this embodiment, the electromagnetic heating module 100 may be assembled in advance as an independent module, the assembled electromagnetic heating module 100 may be directly inserted into the mounting groove 211 through the mounting opening 221, and then the connection terminal 130 exposed outside the mounting opening 221 is connected to the power supply line 3 of the drum washing machine, so as to complete the assembly of the electromagnetic heating module 100 and the outer tub 2.

As shown in fig. 8 to 12, in a preferred embodiment of the present invention, a bracket 212 for supporting the electromagnetic heating module 100 is disposed in the mounting groove 211, and the bracket 212 is respectively connected to an inner wall of the mounting groove 211 and a portion of the plastic casing extending into the mounting groove 211, that is, the bracket 212 is connected to the casing body 110.

Specifically, the two sides of the plastic package housing, that is, the left and right sides of the housing body 110, are respectively provided with an insertion groove 112 extending along the axis of the outer cylinder 2, and the bracket 212 is fixedly connected with the inner wall of the mounting groove 211 and inserted into the insertion groove 112 from the free end of the plastic package housing.

Preferably, the bracket 212 is made of plastic material, and does not induce eddy current effect in the magnetic field generated by the electromagnetic heating module 100, thereby generating heat.

More preferably, the bracket 212 is integrally formed with the sidewall 210 of the outer tub 2 to extend from the left and right inner walls of the mounting groove 211 toward the inside of the mounting groove 211.

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

In the above-described configuration, the extension length of the electromagnetic heating module 100 in the axial direction of the outer tube 2 is long, and the weight of the electromagnetic heating module 100 itself is large, and stable support of the electromagnetic heating module 100 cannot be achieved well only by the insertion fitting of the mounting base 120 and the mounting opening 221. The left end of the electromagnetic heating module 100 is suspended, and may fall down due to gravity, and in severe cases, the assembly structure of the mounting base 120 and the mounting opening 221 may be damaged. The portion of the electromagnetic heating module 100 extending into the mounting groove 211 is supported by the bracket 212, so that the electromagnetic heating module 100 is more stably mounted in the mounting groove 211.

In another preferred embodiment of this embodiment, the electromagnetic heating module 100 further includes a support portion disposed at the free end of the plastic package housing, and the support portion extends from the free end of the plastic package housing to the inner wall of the mounting groove 211 and is connected to the inner wall of the mounting groove 211.

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

In the above scheme, the supporting portion also plays a role in supporting the suspended end of the electromagnetic heating module 100, and the stability of the electromagnetic heating module 100 installed in the installation groove 211 is ensured. The supporting part and the shell body 110 of the plastic package shell are integrally formed, a part for supporting the electromagnetic heating module does not need to be arranged independently, and the structure is simpler. When the electromagnetic heating module is installed, the installation base 120 is inserted into the installation opening 221 from the outer side of the bottom wall 220, then the shell body 110 provided with the supporting portion is inserted into the insertion part 121 of the installation base 120 from the inner side of the installation opening 221, the electromagnetic heating coil is sealed, and finally the cylinder wall and the cylinder bottom of the outer cylinder 2 are assembled together, namely the assembly of the outer cylinder 2 and the electromagnetic heating module 100 is completed.

In a further embodiment of the present embodiment, an upper surface of the electromagnetic heating module 100 facing the inner cylinder 1 is an arc surface coaxial with the sidewall of the inner cylinder 1.

In this embodiment, the upper surface of the electromagnetic heating module 100 is set to be an arc surface coaxial with the side wall of the inner cylinder 1, so that distances between each position on the upper surface of the electromagnetic heating module 100 and the side wall of the inner cylinder 1 are equal, the side wall of the inner cylinder 1 is heated uniformly, and uniform heating of the washing water is realized.

Preferably, the drain port in the mounting recess 211 is provided in the bottom wall of the mounting recess 211 below the free end of the electromagnetic heating module 100. The position of setting up of outlet is kept away from installing port 221 as far as possible and is set up, has avoided the trend that the washing water in mounting groove 211 gathers near installing port 221 department, has further reduced the risk that the installing port 221 department takes place to leak, and then has avoided binding post 130 and power supply line 3 and washing water contact to cause the electric leakage accident.

In this embodiment, by forming the mounting opening 221 in the bottom 220 of the outer tube 2, the electromagnetic heating module 100 can be inserted into the mounting groove 211 as an independent module directly through the mounting opening 221, and the assembly is simple. Through the design of the mounting seat 120 of the electromagnetic heating module 100, the mounting position of the electromagnetic heating module 100 is more accurate, and the sealing of the mounting opening 221 is realized through the sealing member 123. The support 212 supports the suspended end of the electromagnetic heating module 100, so that the length and weight of the electromagnetic heating module 100 are prevented from affecting the installation stability of the electromagnetic heating module, and meanwhile, the assembly structure of the installation seat 120 and the installation opening 221 is prevented from being damaged.

EXAMPLE five

As shown in fig. 1, the present embodiment provides a control method of a drum washing machine according to the fourth embodiment. In the process that the electromagnetic heating module 100 heats the inner barrel, the drum washing machine judges whether the electromagnetic heating module 100 is in a dry-burning state or not according to the working parameters of the electromagnetic heating module 100 and/or the environmental parameters around the electromagnetic heating module 100.

In the above scheme, drum washing machine can judge whether electromagnetic heating module is the dry combustion state according to electromagnetic heating module's working parameter and/or electromagnetic heating module surrounding environmental parameter, and the judgement that appears the dry combustion state is accurate timely, and then can make corresponding feedback, has prevented that electromagnetic heating module from burning the clothing that damages the inner tube futilely, perhaps leads to electromagnetic heating module overheated trouble or even causes the potential safety hazard because the dry combustion.

The scheme for judging whether the electromagnetic heating module 100 is in the dry-burning state by the drum washing machine at least comprises the following three schemes:

in the first scheme, a first temperature sensor is arranged on the electromagnetic heating module 100, and in 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 a first set temperature, the electromagnetic heating module 100 is determined to be in a dry-burning state.

In a second aspect, the drum washing machine includes a second temperature sensor for detecting a temperature between the outer drum 2 and the inner drum 1, and in a process that the electromagnetic heating module 100 heats the inner drum, if a temperature detected by the second temperature sensor is higher than a second set temperature, it is determined that the electromagnetic heating module 100 is in a dry-fire state.

In the third scheme, in the process that the electromagnetic heating module 100 heats the inner barrel 1, the drum washing machine monitors the output power of the electromagnetic heating module 100. When the output power P of the electromagnetic heating module 100 is greater than the set power P₀Then, the electromagnetic heating module 100 is determined to be in a dry-fire state. Specifically, in the process that the electromagnetic heating module 100 heats the inner barrel 1, the drum washing machine obtains the working current I and the working voltage U of the electromagnetic heating module 100 in real time, and the working current I and the working voltage U are measured according to the output power P ═ I × UThe output power P is calculated.

In the three schemes, because 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 the surrounding temperature changes for a certain time, the drum washing machine judges whether the drum washing machine is in a dry-heating state by monitoring the output power P in the working process of the electromagnetic heating module 100, compared with a judgment hysteresis phenomenon which may occur when the temperature is used as a judgment standard, the detection of the dry-heating condition 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-fire state, the electromagnetic heating module 100 is controlled to stop heating, so as to prevent the electromagnetic heating module 100 from continuing to heat and damage the clothes in the inner drum or damage the electromagnetic heating module 100.

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

When the water level in the inner cylinder 1 reaches a first preset water level H₁And when the water is filled, controlling the water inlet device to stop water inlet.

In the above-described embodiment, the electromagnetic heating module 100 is controlled to stop heating, and water is also injected into the inner cylinder 1 through the water inlet device. Because water supply is realized to water installations and running water intercommunication, the water of pouring into inner tube 1 is normal atmospheric temperature water to can carry out rapid cooling to the inner tube of high temperature. When the clothes exist in the inner barrel 1, the clothes can be quickly cooled, and the clothes are prevented from being damaged in a high-temperature environment for a long time.

In the preferred embodiment, when the water level in the inner cylinder 1 reaches the second preset water level H₂And then, controlling the electromagnetic heating module 100 to continuously heat the inner barrel. The second preset water level H₂The setting of (1) satisfies: h₂<H₁。

In the scheme, when the inner cylinder reaches a certain water level height, the electromagnetic heating module 100 is automatically controlled to restart, the inner cylinder 1 is continuously heated, the subsequent program can be continuously operated without user operation, and the dry burning fault is automatically eliminated.

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

And when the frequency of judging that the electromagnetic heating module is in the dry-burning state reaches the preset frequency N, the drum washing machine stops running and gives an alarm.

In a further scheme 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 rotation speed. The water injected into the inner cylinder 1 flows in the inner cylinder 1 by controlling the rotation of the inner cylinder 1, so that the cooling efficiency of the inner cylinder 1 is accelerated.

Further, in the present embodiment, during the water inlet process, when the water level in the inner barrel 1 reaches the third preset water level H₂While controlling the inner cylinder 1 to discharge water at the rotating speed V_{Row board}The rotation drains water into the outer tub 2, causing the electromagnetic heating module 100 to be at least partially immersed in water.

In the above scheme, at least part of the electromagnetic heating module 100 is immersed in the water drained from the inner cylinder 1 to the outer cylinder 2, so that the electromagnetic heating module 100 is in contact with water to perform heat exchange, rapid cooling of the electromagnetic heating module 100 can be realized, and the electromagnetic heating module 100 is prevented from being overheated for a long time and breaking down.

In this embodiment, in the process that the electromagnetic heating module 100 heats the inner barrel 1, the drum washing machine may determine 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 control the electromagnetic heating module 100 to stop heating when the electromagnetic heating module is determined as the dry-burning state, so that the occurrence of the dry-burning condition may be detected accurately in time, and the electromagnetic heating module 100 is prevented from continuously burning to damage the laundry or cause a failure. When the dry-fire condition is judged to occur, water is injected into the inner barrel 1 for cooling, the electromagnetic heating module 100 is restarted to continue heating when the water level in the inner barrel 1 reaches a certain height, the follow-up program can be automatically operated without user operation, and the automation degree is high.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims (10)

1. A control method of a roller washing machine comprises an outer barrel and an inner barrel, wherein the inner barrel is arranged in the outer barrel and can independently contain washing water during washing; the lower part of the outer cylinder is provided with an electromagnetic heating module for heating the inner cylinder;

the electromagnetic heating device is characterized in that before the electromagnetic heating module starts to heat the inner cylinder or in the process of heating the inner cylinder by the electromagnetic heating module, the inner cylinder is controlled to discharge water into the outer cylinder, so that at least part of the electromagnetic heating module is immersed in water.

2. A control method for a drum washing machine according to claim 1, characterized in that the inner drum is provided with a centrifugal drainage structure which can reach a drainage rotation speed V of the inner drum_{Row board}When the water is drained, the water tank is opened for draining;

before the electromagnetic heating module starts to heat the inner barrel or in the process of heating the inner barrel by the electromagnetic heating module, controlling the inner barrel to discharge water at a rotating speed V_{Row board}The rotation of the water pump discharges water into the outer cylinder.

3. The control method of the drum washing machine according to claim 2, characterized in that the drum washing machine controls the inner drum to drain water at a rotating speed V after receiving the command of starting the electromagnetic heating module_{Row board}Rotating to drain water into the outer cylinder;

preferably, the drumThe washing machine receives an instruction for starting the electromagnetic heating module and passes a first preset time length T₁Then, controlling the inner cylinder to rotate and drain water into the outer cylinder;

more preferably, the drum washing machine determines the first preset time period T according to a set heating temperature of the washing water₁。

4. The control method of a drum washing machine according to claim 2, characterized in that a first temperature sensor is arranged on the electromagnetic heating module, and when the temperature detected by the first temperature sensor is higher than a first preset temperature, the inner drum is controlled to rotate at a drainage rotating speed V_{Row board}Rotating to drain water into the outer cylinder;

and/or a second temperature sensor for detecting the temperature between the inner cylinder and the outer cylinder is arranged in the outer cylinder, and when the temperature detected by the second temperature sensor is higher than a second preset temperature, the inner cylinder is controlled to drain the water at a rotating speed V_{Row board}The rotation of the water pump discharges water into the outer cylinder.

5. The control method of a drum washing machine according to claim 2, wherein the drum washing machine has a washing water heating program, and when receiving an instruction to operate the washing water heating program, the drum washing machine controls the inner drum to discharge the water at a discharge rotation speed V during or after the washing water is supplied_{Row board}The rotation of the water pump discharges water into the outer cylinder.

6. A drum washing machine control method according to any of claims 2-5, characterized in that the drum washing machine controls the inner drum to drain at a rotational speed V_{Row board}Continuously rotating for a second preset time period T₂Draining;

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

7. A control method of a drum washing machine according to any one of claims 1-6, characterized in that a water outlet is arranged on the outer drum, the drum washing machine further comprises a water discharge device for communicating the water outlet and the outside of the drum washing machine;

the control drainage device keeps closed in the process of draining water from the inner cylinder to the outer cylinder, and the communication between the drainage port and the outside of the drum washing machine is cut off.

8. A drum washing machine comprises an outer drum and an inner drum, wherein the inner drum is arranged in the outer drum and is provided with a washing chamber for independently containing washing water; an electromagnetic heating module for heating the inner barrel is arranged in the outer barrel, and the electromagnetic heating module is characterized by having a heat dissipation structure;

the drum washing machine preferably adopts the control method of the drum washing machine as claimed in any one of claims 1 to 7.

9. A drum washing machine according to claim 8, characterized in that the electromagnetic heating module has an upper surface facing the inner drum, and the heat dissipation structure comprises heat dissipation holes provided on the upper surface.

10. A drum washing machine according to claim 9, characterized in that the electromagnetic heating module comprises an electromagnetic heating coil and a plastic casing encasing the electromagnetic heating coil, the plastic casing having an upper surface facing the inner drum and a lower surface opposite the upper surface;

the plastic package heating module comprises an inner barrel, a plastic package shell and a radiating hole, wherein the upper surface of the plastic package shell is provided with a first opening, the lower surface of the plastic package shell is provided with a second opening corresponding to the first opening, and the plastic package shell extends to the second opening from the first opening to the direction far away from the inner barrel to form the radiating hole penetrating through the electromagnetic heating module.

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