Drying fan, clothes processing equipment and clothes processing equipment control method

Abstract

The invention relates to the technical field of clothes treatment equipment, and discloses a drying fan, clothes treatment equipment and a clothes treatment equipment control method. The drying fan comprises a fan volute, an impeller and a heat production device, the impeller is rotationally arranged in the fan volute, the heat production device comprises a heating magnetic ring, the heating magnetic ring is arranged in the volute and located at the end of the impeller, and the heating magnetic ring can generate a magnetic field so that the impeller can generate heat under the action of the magnetic field. The heating magnetic ring is arranged in the fan volute, when the heating magnetic ring is powered on, the heating magnetic ring generates a magnetic field, so that the impeller generates heat under the action of magnetic field eddy current, and hot air flow can be generated when the impeller rotates. Namely, hot air flow can be automatically generated when the drying fan works, so that a heating pipe does not need to be additionally arranged for heating the air flow, the problem that the drying efficiency is affected due to accumulation of thread scraps at the position of the heating pipe is fundamentally solved, meanwhile, the problem of fire disasters caused by accumulation of the thread scraps can be avoided, and the drying effect and the use safety of the clothes treatment equipment are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing treatment equipment, and in particular to a drying fan, a clothing treatment equipment and a control method for the clothing treatment equipment. Background Art

[0002] In order to meet the user's need for drying clothes, some drum washing machines are designed with a drying function. However, the existing drum washing machines with a drying function usually adopt a design of a fan with a heating tube, and the heating tube is arranged on the air outlet path of the fan to heat the air blown out by the fan, so as to generate hot air and introduce it into the drum to dry the clothes.

[0003] In the above design method, after the washing machine is used for a period of time, lint generated during the drying process will accumulate at the heating tube. The presence of lint will affect the heating efficiency of the heating tube, and thus affect the drying efficiency. At the same time, some lint will be re-introduced into the drum during the drying air flow circulation process, resulting in secondary pollution of the clothes, and the lint accumulated at the heating tube poses a fire hazard in a high-temperature environment, affecting the use safety of the washing machine.

[0004] Therefore, there is an urgent need for a drying fan, a clothing treatment equipment and a control method for the clothing treatment equipment to solve the above problems. Summary of the Invention

[0005] Based on the above problems, the purpose of the present invention is to provide a drying fan, a clothing treatment equipment and a control method for the clothing treatment equipment. The drying fan enables the clothing treatment equipment to achieve the drying purpose without setting a heating tube, and can improve the drying efficiency and the use safety of the clothing treatment equipment at the same time.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, a drying fan is provided, which includes a fan volute, an impeller and a heat generation device. The impeller is rotatably arranged in the fan volute. The heat generation device includes a heating magnetic ring, and the heating magnetic ring is arranged in the fan volute and located at the end of the impeller. The heating magnetic ring can be energized to generate a magnetic field, so that the impeller generates heat under the action of magnetic field eddy current.

[0008] As a preferred embodiment of the drying fan of the present invention, the heating magnetic ring includes a circular ring and a plurality of exciting coils. The plurality of exciting coils are arranged at intervals along the circumferential direction in the circular ring, and the winding directions of every two adjacent exciting coils are opposite.

[0009] As a preferred embodiment of the drying fan of the present invention, the heat generation device further includes an electromagnetic module, and the electromagnetic module is electrically connected to the plurality of exciting coils for controlling the energization or de-energization of the plurality of exciting coils. When the plurality of exciting coils are energized, an alternating magnetic field can be generated.

[0010] As a preferred embodiment of the drying fan of the present invention, two heating magnetic rings are provided, and the two heating magnetic rings are respectively arranged at both ends of the impeller along the axial direction.

[0011] As a preferred embodiment of the drying fan of the present invention, the fan volute includes a first half shell and a second half shell that are buckled together. The first half shell has a first installation groove, and the second half shell has a second installation groove. The first installation groove is used to accommodate one of the heating magnetic rings, and the second installation groove is used to accommodate the other heating magnetic ring.

[0012] As a preferred embodiment of the drying fan of the present invention, the drying fan further includes a rotation driving member, and the output end of the rotation driving member is in transmission connection with the impeller for driving the impeller to rotate.

[0013] In a second aspect, a laundry treatment device is provided, including a device cabinet, a drum, and the drying fan as described above. The drum and the drying fan are both located in the device cabinet, and the air outlet of the drying fan is communicated with the drum.

[0014] In a third aspect, a control method for a laundry treatment device is provided, which is applied to the laundry treatment device as described above, and includes the following steps:

[0015] Obtain the operating mode of the laundry treatment device, and the operating mode includes a washing mode and a drying mode;

[0016] Judge whether the drying mode is triggered. If so, control the drying fan to start and operate at the set power in the current drying mode.

[0017] As a preferred embodiment of the control method for the laundry treatment device of the present invention, the heating magnetic ring includes a circular ring and a plurality of exciting coils. The plurality of exciting coils are arranged at intervals along the circumferential direction in the circular ring. When the drying fan starts, by adjusting the rotation speed of the impeller and the exciting current of the exciting coils, the operating power of the drying fan is made to reach the set power.

[0018] As a preferred embodiment of the control method for the laundry treatment device of the present invention, the set power corresponding to the drying mode is calculated and determined according to the following formula:

[0019] P = KπfμH2,

[0020] where P is the set power, K is the power coefficient, f is the magnetic field transformation frequency, μ is the magnetic permeability, and H is the magnetic field strength;

[0021] The calculation formula for the magnetic field strength H is: H = N×I / Le;

[0022] Wherein, N is the number of turns of the exciting coil, I is the exciting current of the exciting coil, and Le is the effective magnetic path length of the exciting coil;

[0023] The calculation formula for the magnetic field conversion rate f is: f = n×N / 60;

[0024] Wherein, n is the rotational speed of the impeller, and N is the number of turns of the exciting coil.

[0025] As a preferred solution of the control method for the laundry treatment device of the present invention, the control method for the laundry treatment device further includes the following steps:

[0026] After the drying is completed, it is judged whether the clothes in the drum are taken out. If so, the impeller of the drying fan is controlled to stop rotating, and the heating magnetic ring of the drying fan is controlled to stop heating; if not, the heating magnetic ring of the drying fan is controlled to stop heating, and the impeller of the drying fan is controlled to maintain rotation at a preset rotational speed.

[0027] The beneficial effects of the present invention are:

[0028] The drying fan, laundry treatment device and control method for the laundry treatment device provided by the present invention are provided with a heating magnetic ring in the fan volute. When the heating magnetic ring is energized, the heating magnetic ring can generate a magnetic field, so that multiple blades of the impeller heat up under the action of the magnetic field eddy current. Therefore, when the impeller rotates, the drying fan can generate hot air. That is to say, the drying fan can automatically generate hot air when working. Therefore, there is no need to additionally set a heating pipe to heat the air flow, which fundamentally solves the problem that the drying efficiency is affected due to the accumulation of lint at the heating pipe, and at the same time can avoid the problem of fire caused by the accumulation of lint, effectively improving the drying effect and use safety of the laundry treatment device. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0030] Figure 1 is the first structural schematic diagram of the drying fan provided by the specific embodiment of the present invention;

[0031] Figure 2 is the second structural schematic diagram of the drying fan provided by the specific embodiment of the present invention;

[0032] Figure 3 is the schematic diagram of the impeller and the heat generating device provided by the specific embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the impeller and the heating magnetic ring provided by the specific embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the internal structure of the heating magnetic ring provided by the specific embodiment of the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the first half shell of the drying fan provided by the specific embodiment of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the second half shell of the drying fan provided by the specific embodiment of the present invention;

[0037] Figure 8 It is a schematic diagram of the internal structure of the drying fan provided by the specific embodiment of the present invention;

[0038] Figure 9 It is a flowchart of the control method for the laundry treatment device provided by the specific embodiment of the present invention.

[0039] In the figure:

[0040] 1 - blower housing; 2 - impeller; 4 - rotary drive member;

[0041] 11 - first half shell; 12 - second half shell; 13 - seal;

[0042] 111 - first mounting groove; 121 - second mounting groove; 122 - support member; 123 - flow dividing plate;

[0043] 31 - heating magnetic ring;

[0044] 311 - ring; 312 - exciting coil. Specific Embodiment

[0045] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] As Figures 1 to 8 shown, this embodiment provides a drying fan, which can be applied to washing and drying integrated machines, dryers, drying machines, etc., and can simplify the structural design and reduce the number of components. The drying fan includes a fan volute 1, an impeller 2, and a heat generating device.

[0049] Among them, referring to Figure 1 and Figure 2 , the impeller 2 is rotatably arranged in the fan volute 1. Referring to Figure 3 and Figure 4 , the heat generating device includes a heating magnetic ring 31. The heating magnetic ring 31 is arranged in the fan volute 1 and at the end of the impeller 2. The heating magnetic ring 31 can be energized to generate a magnetic field, so that the impeller 2 generates heat under the action of the magnetic field.

[0050] For the drying fan provided in this embodiment, by arranging the heating magnetic ring 31 in the fan volute 1, when the heating magnetic ring 31 is energized, the heating magnetic ring 31 generates a magnetic field, so that multiple blades of the impeller 2 heat up under the action of the magnetic field eddy current. Therefore, when the impeller 2 rotates, the drying fan can generate a hot air flow. That is to say, the drying fan can automatically generate a hot air flow during operation. Therefore, there is no need to additionally set a heating pipe to heat the air flow, which fundamentally solves the problem of affecting the drying efficiency due to the accumulation of lint at the heating pipe, and at the same time can avoid the problem of fire caused by the accumulation of lint, effectively improving the drying effect and use safety of the clothing treatment equipment.

[0051] Optionally, referring to Figure 5, the heating magnetic ring 31 includes a circular ring 311 and a plurality of exciting coils 312. The plurality of exciting coils 312 are arranged at intervals in the circumferential direction within the circular ring 311, and the winding directions of every two adjacent exciting coils 312 are opposite. When the exciting coils 312 are powered, the plurality of exciting coils 312 form a magnetic field in the range where the circular ring 311 is located, so that the impeller 2 itself heats up under the action of eddy current. In this embodiment, each exciting coil 312 is a set of coil windings, and the winding directions of the coil windings of adjacent exciting coils 312 are opposite, that is, one of the adjacent exciting coils 312 is a clockwise coil winding and the other is a counterclockwise coil winding. Such a setting can enable the plurality of exciting coils 312 to form an alternating magnetic field, and further cause the plurality of blades of the impeller 2 to generate heat due to the eddy current effect in the alternating magnetic field, achieving the purpose of automatically generating hot air flow for the drying fan.

[0052] Optionally, the heat generating device further includes an electromagnetic module (not shown in the figure). The electromagnetic module is electrically connected to the plurality of exciting coils 312 and is used to control the energization or de-energization of the plurality of exciting coils 312. When the plurality of exciting coils 312 are energized, an alternating magnetic field can be generated. The energization and de-energization of the plurality of exciting coils 312 can be controlled through the electromagnetic module, so that the heating magnetic ring 31 generates a magnetic field or the magnetic field disappears. The magnetic field intensity of the heating magnetic ring 31 can be adjusted by adjusting the magnitude of the energizing current, thereby adjusting the drying temperature of the drying fan. In this embodiment, the electromagnetic module is electrically connected to the controller of the laundry treatment device, and the controller controls the electromagnetic module to energize or de-energize the exciting coil 312 according to the control program corresponding to the current operation mode of the laundry treatment device, so that the drying fan generates an appropriate drying temperature.

[0053] In this embodiment, referring to Figure 3 and Figure 4 , two heating magnetic rings 31 are provided, and the two heating magnetic rings 31 are respectively arranged at both ends of the impeller 2 along the axial direction. By arranging the heating magnetic rings 31 at both ends of the impeller 2, the magnetic field range and magnetic field intensity can be increased, so that the plurality of blades of the impeller 2 can generate heat from both ends along the axial direction to the middle at the same time, improving the heat generation speed and heat generation uniformity of the impeller 2, thereby improving the heat generation efficiency of the drying fan.

[0054] Optionally, referring to Figure 1 , Figure 6 and Figure 7 , the fan volute 1 includes a first half shell 11 and a second half shell 12 that are buckled together. A first installation groove 111 is provided inside the first half shell 11, and a second installation groove 121 is provided inside the second half shell 12. The first installation groove 111 is used to accommodate one heating magnetic ring 31, and the second installation groove 121 is used to accommodate the other heating magnetic ring 31. The first installation groove 111 and the second installation groove 121 provide an installation space for the two heating magnetic rings 31, enabling the two heating magnetic rings 31 to stably generate an alternating magnetic field and ensuring that the impeller 2 can quickly heat up.

[0055] In this embodiment, the edges of the first half shell 11 and the second half shell 12 are both provided with flanges. After the first half shell 11 and the second half shell 12 are assembled, the flanges of the two are fitted together, and then the two flanges are connected and fixed using screws. Figure 8 The first half shell 11 and the second half shell 12 are sealed and connected by a seal 13 to ensure the relative airtightness of the fan volute 1, so that negative pressure can be formed in the fan volute 1 to generate a drying airflow. Exemplarily, the seal 13 is a rubber sealing strip sandwiched at the joint gap between the first half shell 11 and the second half shell 12.

[0056] See also Figure 1 and Figure 7 , a support member 122 is provided on the fan volute 1, and the support member 122 is configured to be fixedly connected to the equipment box of the clothes processing device, so as to support and fix the fan volute 1, and ensure that the drying fan is securely installed in the equipment box. Exemplarily, the support member 122 is integrally formed with the second half shell 12, and a connecting ear is provided at one end of the support member 122 away from the second half shell 12, and the connecting ear is connected and fixed to the equipment box by fasteners such as bolts, and the connection is reliable.

[0057] Further, see Figure 7 A diverter plate 123 is provided on the air inlet path of the second half shell 12, and the diverter plate 123 is used to separate and smooth the wind entering the fan volute 1, prevent the air flow from generating vortex in the fan volute 1, and improve the smoothness of the air inlet of the drying fan.

[0058] Optionally, see Figure 3 The drying fan further includes a rotary drive member 4, the output end of which is transmission-connected to the impeller 2 for driving the impeller 2 to rotate. The rotary drive member 4 is electrically connected to the controller of the clothing processing device. When the operation mode of the clothing processing device is determined, the controller controls the opening and closing of the rotary drive member 4 and the operating power according to the control program set in the current operation mode, so that the drying fan generates a suitable drying temperature and drying air volume. Exemplarily, the rotary drive member 4 is a rotary motor.

[0059] The present embodiment also provides a clothes processing device, including a device housing, a drum and a drying fan as described above, wherein the drum and the drying fan are both located in the device housing, and an air outlet of the drying fan is connected to the drum. The clothes processing device can be a washing machine with a drying function, or a clothes dryer or a drying machine, etc.

[0060] For a laundry treatment device using such a drying fan, the drying fan itself can blow hot air, eliminating the need to arrange additional heating devices such as heating tubes along the path of the drying air duct. This can meet the diverse functional requirements of the laundry treatment device, reduce the number of components, and simplify the assembly process. When the fan operates, it automatically generates a hot air flow, fundamentally solving the problem of reduced drying efficiency caused by lint accumulation at the heating tube, and at the same time avoiding the problem of fire caused by lint accumulation, effectively improving the drying effect and usage safety of the laundry treatment device.

[0061] As Figure 9 shown, this embodiment also provides a control method for a laundry treatment device, which is applied to the laundry treatment device described above and includes the following steps:

[0062] S1. Obtain the operating mode of the laundry treatment device, where the operating mode includes a washing mode and a drying mode;

[0063] S2. Determine whether the drying mode is triggered. If so, control the drying fan to start and operate at the set power in the current drying mode.

[0064] Specifically, when the laundry treatment device enters the drying mode, the controller controls the rotation drive member 4 to start according to a preset drying program, and at the same time controls the electromagnetic module to energize multiple excitation coils 312 of the heating magnetic ring 31, so that the impeller 2 generates heat and rises in temperature while rotating, thereby enabling the drying fan to blow hot air and introduce it into the drum of the laundry treatment device to dry the clothes.

[0065] In step S2, if the drying mode is not triggered, the drying fan does not operate and remains in a standby state.

[0066] As Figure 5 shown, the heating magnetic ring 31 includes a circular ring 311 and multiple excitation coils 312, and the multiple excitation coils 312 are arranged at intervals along the circumferential direction within the circular ring 311. In step S2, when the drying fan starts, by adjusting the rotation speed of the impeller 2 and the excitation current of the excitation coil 312, the operating power of the drying fan is made to reach the set power. That is, after the drying mode is determined, the drying temperature is determined, and the rotation speed of the impeller 2 (the rotation speed of the rotation drive member 4) and the excitation current of the excitation coil 312 jointly determine the operating power of the drying fan. Different operating powers of the drying fan correspond to different drying temperatures. Therefore, by adjusting the rotation speed of the impeller 2 and the excitation current of the excitation coil 312, the drying temperature and the air volume output of the drying fan can be adjusted.

[0067] In this embodiment, the set power corresponding to the drying mode is calculated and determined according to the following formula:

[0068] P = KπfμH2,

[0069] Among them, P is the set power, K is the power coefficient, f is the magnetic field transformation frequency, μ is the magnetic permeability, and H is the magnetic field strength.

[0070] The above-mentioned power coefficient K refers to the ratio of the actual maximum power that can be achieved when the drying fan is working to the theoretical maximum power. The power coefficient K is a fixed value after the drying fan is manufactured and formed, and it is a known number. The specific value of the power coefficient K is determined according to the model specifications of the drying fan.

[0071] After the material of the impeller 2 is determined, the above-mentioned magnetic permeability μ is determined and is a known value. Exemplarily, the impeller 2 is made of iron material, and the magnetic permeability of the iron material is 200B / H - 400B / H.

[0072] Furthermore, the calculation formula for the magnetic field strength H is: H = N×I / Le;

[0073] Among them, N is the number of turns of the excitation coil 312, I is the excitation current of the excitation coil 312, and Le is the effective magnetic path length of the excitation coil 312.

[0074] After the specifications of the excitation coil 312 are selected, the number of its turns is known. The excitation current I of the excitation coil 312 is a measured value. During the operation of the drying fan, the magnitude of the excitation current I when the electromagnetic module energizes the excitation coil 312 can be detected in real time, so as to obtain the specific value of the excitation current I. The effective magnetic path length refers to the length of the part of the excitation coil 312 that can generate an alternating magnetic field. The effective magnetic path length Le of the excitation coil 312 is obtained according to the effective magnetic path length of the excitation coil specimen measured in the previous test stage and is a known value.

[0075] Furthermore, the calculation formula for the magnetic field transformation rate f is: f = n×N / 60;

[0076] Among them, n is the rotational speed of the impeller 2, and N is the number of turns of the excitation coil 312. The rotational speed of the impeller 2 is obtained by detecting the rotational speed of the output end of the rotation driving member 4.

[0077] When the structure of the heating magnetic ring 31 and the material of the impeller 2 are determined, the operating power of the drying fan is jointly determined by the rotational speed n of the impeller 2 and the excitation current I of the heating magnetic ring 31. According to the maximum drying temperature that the clothes can withstand under different drying modes, the operating power of the drying fan corresponding to different drying temperatures is measured through previous tests, and then the rotational speed n of the impeller 2 of the drying fan and the excitation current I of the heating magnetic ring 31 are determined according to different operating powers. That is, different drying modes are matched with corresponding rotational speeds n and excitation currents I.

[0078] Furthermore, the clothes treatment equipment control method further includes the following steps:

[0079] S3. After the drying is completed, determine whether the clothes in the drum are taken out. If so, control the impeller 2 of the drying fan to stop rotating, and control the heating magnetic ring 31 of the drying fan to stop heating; if not, control the heating magnetic ring 31 of the drying fan to stop heating, and control the impeller 2 of the drying fan to continue rotating at a preset speed.

[0080] Since sometimes users cannot take out the clothes in time after the drying is completed, if the clothes are stored in the drum for a long time, it is easy to make the clothes have a strange smell. Therefore, when the clothes are not taken out in time, by controlling the drying fan to continue blowing, the air in the drum can be exchanged with the outside, avoiding the clothes from having a strange smell. Since the heating magnetic ring 31 of the drying fan is not heated at this time, the energy consumption of the clothes processing equipment can be reduced.

[0081] The above-mentioned preset speed can be designed as a default value, which can be determined by testing in the early experimental stage, as long as the air can be ventilated inside and outside the drum. Of course, the preset speed can also be set by the user according to actual needs.

[0082] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Drying fan, characterized in that, It includes a fan volute (1), an impeller (2) and a heat generating device. The impeller (2) is rotatably arranged in the fan volute (1). The heat generating device includes a heating magnetic ring (31). The heating magnetic ring (31) is arranged in the fan volute (1) and at the end of the impeller (2). The heating magnetic ring (31) can be energized to generate a magnetic field, so that the impeller (2) generates heat under the action of magnetic field eddy current.

2. The drying fan according to claim 1, wherein The heating magnetic ring (31) includes a ring (311) and a plurality of exciting coils (312). The plurality of exciting coils (312) are arranged at intervals in the circumferential direction in the ring (311), and the winding directions of every two adjacent exciting coils (312) are opposite.

3. The drying fan according to claim 2, wherein, The heat generating device further includes an electromagnetic module. The electromagnetic module is electrically connected to the plurality of exciting coils (312) and is used to control the energization or de-energization of the plurality of exciting coils (312). When the plurality of exciting coils (312) are energized, an alternating magnetic field can be generated.

4. The drying fan according to claim 1, characterized in that, There are two heating magnetic rings (31), and the two heating magnetic rings (31) are respectively arranged at both ends of the impeller (2) along the axial direction.

5. The drying fan according to claim 4, characterized in that, The fan volute (1) includes a first half shell (11) and a second half shell (12) that are buckled together. The first half shell (11) has a first installation groove (111), and the second half shell (12) has a second installation groove (121). The first installation groove (111) is used to accommodate one heating magnetic ring (31), and the second installation groove (121) is used to accommodate the other heating magnetic ring (31).

6. The drying fan according to any one of claims 1-5, characterized in that, The drying fan further includes a rotary driving member (4). The output end of the rotary driving member (4) is in transmission connection with the impeller (2) and is used to drive the impeller (2) to rotate.

7. A laundry treatment device, characterized in that, It includes an equipment box body, a drum and the drying fan according to any one of claims 1-6. The drum and the drying fan are both located in the equipment box body, and the air outlet of the drying fan is communicated with the drum.

8. A method for controlling a laundry treatment device, applied to the laundry treatment device according to claim 7, characterized in that, It includes the following steps: Obtain the operation mode of the clothing treatment equipment. The operation mode includes a washing mode and a drying mode; Judge whether the drying mode is triggered. If so, control the drying fan to start and operate at the set power in the current drying mode.

9. The method for controlling a laundry treating apparatus according to claim 8, wherein, The heating magnetic ring (31) includes a ring (311) and a plurality of exciting coils (312). The plurality of exciting coils (312) are arranged at intervals in the circumferential direction in the ring (311). When the drying fan starts, by adjusting the rotation speed of the impeller (2) and the exciting current of the exciting coils (312), the operating power of the drying fan reaches the set power.

10. The control method of the laundry treatment device according to claim 9, characterized in that, The set power corresponding to the drying mode is calculated and determined according to the following formula: P = KπfμH2, where P is the set power, K is the power coefficient, f is the magnetic field transformation frequency, μ is the magnetic permeability, and H is the magnetic field strength; The calculation formula for the magnetic field strength H is: H = N×I / Le; where N is the number of turns of the exciting coil (312), I is the exciting current of the exciting coil (312), and Le is the effective magnetic path length of the exciting coil (312); The calculation formula for the magnetic field transformation rate f is: f = n × N / 60; wherein, n is the rotation speed of the impeller (2), and N is the number of turns of the exciting coil (312).

11. The method for controlling a laundry treating apparatus according to claim 8, wherein, The method for controlling the laundry treatment device further includes the following steps: After the drying is completed, it is judged whether the laundry in the drum is taken out. If so, the impeller (2) of the drying blower is controlled to stop rotating, and the heating magnetic ring (31) of the drying blower is controlled to stop heating; if not, the heating magnetic ring (31) of the drying blower is controlled to stop heating, and the impeller (2) of the drying blower is controlled to continue rotating at a preset rotation speed.

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