Control method of clothes airing machine and clothes airing machine

Abstract

The invention discloses a control method of a clothes airing machine and the clothes airing machine, and belongs to the technical field of smart home, and the control method of the clothes airing machine comprises the following steps: S1, circularly executing power-on and power-off actions on a coil arranged on the periphery of a winding wheel in a sleeving manner through a control circuit; s2, whenever the coil is in a power-off state, an induced current value of the coil is obtained through a current detection assembly; and S3, the number of turns of the lifting rope on the winding wheel is judged according to the induced current value. The clothes airing machine comprises a clothes airing rod, a lifting mechanism and a sensing device, the lifting mechanism comprises a winding wheel and a lifting rope, the winding wheel is made of a non-magnetic material, and the lifting rope is made of a magnetic material; the induction device comprises a control circuit, a coil and a current detection assembly, and the coil is arranged on the periphery of the winding wheel in a sleeving mode. The number of turns of the lifting rope on the winding wheel is judged through the magnetic induction principle, the current change is sensitive, and therefore the number of turns of the lifting rope can be detected more accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of smart home, and particularly to a control method for a clothes dryer and a clothes dryer. Background Art

[0002] For current electric clothes dryers, the clothes drying rod can not only stop at the lowest position and the highest position, but also stop at any intermediate position between the lowest position and the highest position. For the moving distance of the clothes drying rod, some are detected by a ranging module. By setting a reflector on the clothes drying rod, the ranging module measures the position of the clothes drying rod by transmitting a signal to the reflector and receiving the signal reflected by the reflector. However, the signal emitted by the ranging module is easily blocked by foreign objects, resulting in inaccurate detection. Some detect the number of turns of the wire reel rotation through a Hall sensor, and then calculate the moving distance of the steel wire rope according to the length of the steel wire rope on each turn of the wire reel. It requires complex calculations, and the detection is not accurate when the wire reel rotates less than one turn. Summary of the Invention

[0003] The purpose of the present invention is to provide a control method for a clothes dryer and a clothes dryer to solve the technical problem of inaccurate detection of the position of the clothes drying rod in the prior art.

[0004] As conceived above, the technical solution adopted by the present invention is as follows:

[0005] A control method for a clothes dryer includes:

[0006] Step S1: Circulatingly performing energization and power-off actions on a coil sleeved on the outer periphery of a wire reel through a control circuit;

[0007] Step S2: Whenever the coil is in a power-off state, obtaining an induced current value of the coil through a current detection component;

[0008] Step S3: Judging the number of turns of the lifting rope on the wire reel according to the magnitude of the induced current value.

[0009] Wherein, if the induced current value is greater than or equal to a first set current value, or the induced current value is less than or equal to a second set current value, a first prompt message is sent and the wire reel is controlled to stop rotating.

[0010] Wherein, if the induced current value is less than the first set current value and greater than or equal to a third set current value, or the induced current value is greater than the second set current value and less than or equal to a fourth set current value, a second prompt message is sent and the rotation speed of the wire reel is controlled to drop to the lowest rotation speed.

[0011] Wherein, when the clothes drying rod is in a static state, if the clothes dryer receives a lifting or lowering instruction, first obtain N induced current values. If the difference between any two induced current values is within a first current range, then control the wire reel to rotate.

[0012] Among them, before controlling the rotation of the wire reel, if the drying rod is in the highest position and the drying machine receives a rising instruction, or if the drying rod is in the lowest position and the drying machine receives a descending instruction, a first alarm message is sent.

[0013] Among them, the difference between two adjacent induced current values is the current change rate, and the lifting and lowering speed of the drying rod is judged according to the current change rate.

[0014] Among them, when the drying rod is in a stationary state, if the drying machine receives a lifting or lowering instruction, after a first set time period, if the current change rate is within a first set range, a second alarm message is sent.

[0015] Among them, after step S3, it further includes:

[0016] Step S4: Determine the position of the drying rod according to the number of turns of the lifting rope on the wire reel.

[0017] A drying machine, comprising:

[0018] A drying rod;

[0019] A lifting mechanism, including a wire reel and a lifting rope wound around the wire reel, the drying rod is connected to the lifting rope, the wire reel is made of a non-magnetic material, and the lifting rope is made of a magnetic material;

[0020] An induction device, including a control circuit, a coil and a current detection component, the coil is sleeved on the outer periphery of the wire reel, the control circuit is used to energize or de-energize the coil, and the current detection component is used to detect the current value in the coil.

[0021] Among them, the lifting mechanism further includes a first guide pulley, the first guide pulley is located in the space surrounded by the coil, the lifting rope is wound around the first guide pulley and extends parallel to the axial direction of the coil under the guidance of the first guide pulley.

[0022] The beneficial effects of the present invention:

[0023] The control method of the clothes dryer proposed by the present invention has a coil sleeved on the outer periphery of a wire winding wheel. The lifting rope is equivalent to an iron core arranged inside the coil. When the number of turns of the lifting rope on the wire winding wheel changes, it is equivalent to a change in the length of the iron core. When the control circuit performs energization and de - energization actions on the coil in a cycle, an alternating magnetic field is generated around the coil, so that the lifting rope has magnetism. Whenever the coil is in a de - energized state, the magnetic field generated by the lifting rope acts on the coil, causing an induced current to be generated in the coil. The stronger the magnetic field generated by the lifting rope with more turns, and the weaker the magnetic field generated by the lifting rope with fewer turns. When the number of turns of the lifting rope changes, the generated magnetic field changes, and further the induced current changes. Therefore, the number of turns of the lifting rope on the wire winding wheel can be judged according to the magnitude of the induced current value. By judging the number of turns of the lifting rope on the wire winding wheel through the magnetic induction principle, the change of the current is relatively sensitive, so the detection of the number of turns of the lifting rope is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a partial structural schematic diagram of the clothes dryer provided in Embodiment 1 of the present invention;

[0025] Figure 2 FIG. is a partial structural sectional view of the clothes dryer provided in Embodiment 1 of the present invention;

[0026] Figure 3 FIG. is the flow of the control method of the clothes dryer provided in Embodiment 1 of the present invention Figure 1 ;

[0027] Figure 4 FIG. is the flow of the control method of the clothes dryer provided in Embodiment 1 of the present invention Figure 2 ;

[0028] Figure 5 FIG. is the flow of the control method of the clothes dryer provided in Embodiment 1 of the present invention Figure 3 ;

[0029] Figure 6 FIG. is the flow of the control method of the clothes dryer provided in Embodiment 2 of the present invention Figure 1 ;

[0030] Figure 7 FIG. is the flow of the control method of the clothes dryer provided in Embodiment 2 of the present invention Figure 2 .

[0031] In the figure:

[0032] 1, wire winding wheel; 2, lifting rope; 3, coil; 4, first guide wheel. DETAILED DESCRIPTION OF THE INVENTION

[0033] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between 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 situations.

[0035] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0037] Embodiment 1

[0038] See Figure 1 and Figure 2 , an embodiment of the present invention provides a clothes drying machine, including a clothes drying rod, a lifting mechanism, and a sensing device. The lifting mechanism includes a winding wheel 1 and a lifting rope 2 wound around the winding wheel 1. The clothes drying rod is connected to the lifting rope 2. The winding wheel 1 is made of a non-magnetic material, and the lifting rope 2 is made of a magnetic material. The sensing device includes a control circuit, a coil 3, and a current detection component. The coil 3 is sleeved on the outer periphery of the winding wheel 1. The control circuit is used to energize or de-energize the coil 3, and the current detection component is used to detect the current value in the coil 3.

[0039] Among them, the non-magnetic material can be plastic, rubber, nylon or ceramic; the magnetic material can be iron, cobalt or nickel. Therefore, a steel wire rope is usually selected as the lifting rope 2. Winding the lifting rope 2 around the wire reel 1 is a conventional technique. Usually, a row of winding grooves is provided on the outer peripheral surface of the wire reel 1. The winding grooves can enable the lifting rope 2 to be arranged in an orderly manner at a fixed position, avoiding entanglement and facilitating the control of the retraction and release of the lifting rope 2. The current detection component can be an existing ammeter. Energizing or de-energizing the coil 3 by the control circuit can be achieved by closing or opening a control switch, and its principle is a conventional technique.

[0040] Among them, the rotation of the wire reel 1 can be driven by a motor and a gear mechanism. The gear mechanism includes a driven gear coaxially arranged with the wire reel 1. A driving gear is provided on the motor shaft of the motor. The driving gear meshes with the driven gear, thereby being able to drive the driven gear to rotate, and then drive the wire reel 1 to rotate. The forward or reverse rotation of the motor realizes the forward or reverse rotation of the wire reel 1. When the wire reel 1 rotates forward, the lifting rope 2 is released and the clothes drying rod descends; when the wire reel 1 rotates in reverse, the lifting rope 2 is retracted and the clothes drying rod ascends.

[0041] The axis of the wire reel 1 extends along a first straight line direction. The first straight line can extend along the horizontal direction or the vertical direction. The lifting mechanism further includes a guiding component for guiding the lifting rope 2 to extend downward, facilitating the connection with the clothes drying rod.

[0042] The guiding component includes a first guiding wheel 4. The first guiding wheel 4 is located within the space surrounded by the coil 3. The lifting rope 2 is wound around the first guiding wheel 4 and extends parallel to the axial direction of the coil 3 under the guidance of the first guiding wheel 4. By providing the first guiding wheel 4, the interference between the lifting rope 2 and the coil 3 is avoided. The guiding component further includes a second guiding wheel located outside the coil 3. The lifting rope 2 is wound around the second guiding wheel and extends vertically downward under the guidance of the second guiding wheel.

[0043] The diameter of the coil 3 is 1.5 - 2 times the diameter of the wire reel 1, which not only ensures that the coil 3 will not interfere with the lifting rope 2, but also ensures that the magnetic field generated by the coil 3 can act on the lifting rope 2.

[0044] The clothes dryer further includes a controller. Components that need to be controlled, such as the driving mechanism, the control circuit, and the current detection component, are all electrically connected to the controller. The controller can receive lifting and stop instructions to control the start and stop of the driving mechanism and realize the lifting of the clothes drying rod. The controller can receive the current value detected by the current detection component, and the controller can also control the closing and opening of the control circuit. The control principle of the controller is a conventional technique in the field of electric control and will not be elaborated here.

[0045] Since the coil 3 is sleeved on the outer periphery of the winding wheel 1, the lifting rope 2 is equivalent to an iron core disposed inside the coil 3. When the number of turns of the lifting rope 2 on the winding wheel 1 changes, it is equivalent to a change in the length of the iron core. When the number of turns of the lifting rope 2 on the winding wheel 1 decreases, it is equivalent to the iron core becoming shorter; when the number of turns of the lifting rope 2 on the winding wheel 1 increases, it is equivalent to the iron core becoming longer.

[0046] See Figures 3 to 5 , an embodiment of the present invention provides a control method for a clothes dryer, including: Step S1: The coil 3 sleeved on the outer periphery of the winding wheel 1 is cyclically energized and de-energized through a control circuit; Step S2: Whenever the coil 3 is in a de-energized state, the induced current value of the coil 3 is obtained through a current detection component; Step S3: The number of turns of the lifting rope 2 on the winding wheel 1 is judged according to the magnitude of the induced current value.

[0047] Since the coil 3 is sleeved on the outer periphery of the winding wheel 1, the lifting rope 2 is equivalent to an iron core disposed inside the coil 3. When the number of turns of the lifting rope 2 on the winding wheel 1 changes, it is equivalent to a change in the length of the iron core; when the control circuit cyclically energizes and de-energizes the coil 3, an alternating magnetic field is generated around the coil 3, so that the lifting rope 2 has magnetism. Whenever the coil 3 is in a de-energized state, the magnetic field generated by the lifting rope 2 acts on the coil 3, causing an induced current to be generated in the coil 3; the more turns the lifting rope 2 has, the stronger the generated magnetic field; the fewer turns the lifting rope 2 has, the weaker the generated magnetic field; when the number of turns of the lifting rope 2 changes, the generated magnetic field changes, and further the induced current changes. Therefore, the number of turns of the lifting rope 2 on the winding wheel 1 can be judged according to the magnitude of the induced current value. By judging the number of turns of the lifting rope 2 on the winding wheel 1 through the magnetic induction principle, the change of the current is relatively sensitive, so the detection of the number of turns of the lifting rope 2 is more accurate.

[0048] Among them, the coil 3 sleeved on the outer periphery of the winding wheel 1 is cyclically energized and de-energized through a control circuit, that is, the coil 3 is controlled to be energized, de-energized, energized, de-energized... The energization duration and the de-energization duration can be fixed values and set according to actual needs. Usually, multiple energizations and de-energizations can be completed within a few seconds. Whenever the coil 3 is in a de-energized state, the induced current value of the coil 3 is obtained through a current detection component, so the induced current value can be detected multiple times in a short time.

[0049] There is a one-to-one correspondence between the magnitude of the induced current value and the number of turns of the lifting rope 2 on the winding wheel 1. Therefore, after obtaining the current induced current, the number of turns of the lifting rope 2 corresponding to the induced current can be retrieved according to the data stored in the database. The data stored in the database is obtained and stored through multiple detections before leaving the factory. The number of turns of the lifting rope 2 on the winding wheel 1 can be an integer or a fraction, such as 7 / 3 turns.

[0050] For a clothes dryer, the total length of the lifting rope 2 is fixed. Therefore, the position of the clothes drying rod can be determined according to the number of turns of the lifting rope 2 on the winding wheel 1. By using the magnetic induction principle to judge the position of the clothes drying rod, the change of current is relatively sensitive, so the position of the clothes drying rod can be judged more accurately.

[0051] There is a one-to-one correspondence between the number of turns of the lifting rope 2 on the winding wheel 1 and the position of the clothes drying rod. Therefore, after obtaining the number of turns of the lifting rope 2 on the current winding wheel 1, the position of the clothes drying rod corresponding to this number of turns can be retrieved according to the data stored in the database. The data stored in the database is obtained and stored through multiple detections.

[0052] In summary, there is a one-to-one correspondence between the magnitude of the induced current value and the position of the clothes drying rod, and thus the position of the clothes drying rod can be determined according to the magnitude of the induced current.

[0053] The clothes drying rod can move between the highest position and the lowest position. When the clothes drying rod is at the highest position, the number of turns of the lifting rope 2 on the winding wheel 1 is M1, and the generated induced current is the largest, set as I1. When the clothes drying rod is at the lowest position, the number of turns of the lifting rope 2 on the winding wheel 1 is M2, and the generated induced current is the smallest, set as I2. When the clothes drying rod is at a certain position between the highest position and the lowest position, the generated induced current is between I1 and I2. For example, if the induced current is I3, then the clothes drying rod is at the first position; if the induced current is I4, then the clothes drying rod is at the second position; and so on. Among them, the first position and the second position can be a fixed height value or a height range.

[0054] It can be understood that if the clothes drying rod rises, the number of turns of the lifting rope 2 on the winding wheel 1 increases, and the induced current increases. If the clothes drying rod descends, the number of turns of the lifting rope 2 on the winding wheel 1 decreases, and the induced current decreases. Therefore, if a series of sequentially obtained induced current values show an increasing trend, it is judged that the clothes drying rod is rising; if a series of sequentially obtained induced current values show a decreasing trend, it is judged that the clothes drying rod is descending.

[0055] In this embodiment, there is no need to set proximity switches at the highest position and the lowest position. Whether the clothes drying rod reaches the highest position or the lowest position is judged by the magnitude of the induced current value. If the induced current value is greater than or equal to the first set current value, or the induced current value is less than or equal to the second set current value, a first prompt message is sent and the rotation of the winding wheel 1 is controlled to stop. Among them, the first prompt message can be "Reached the highest position" or "Reached the lowest position" displayed in text or broadcast by voice.

[0056] When the clothes drying rod rises close to the highest position, or when the clothes drying rod descends close to the lowest position, in order to avoid large vibrations caused by sudden stops at the end points, the moving speed of the clothes drying rod can be reduced. Therefore, if the induced current value is less than the first set current value and greater than or equal to the third set current value, or, if the induced current value is greater than the second set current value and less than or equal to the fourth set current value, the second prompt message is sent and the rotation speed of the wire reel 1 is controlled to decrease to the lowest rotation speed. Among them, the second prompt message can be "approaching the end point" displayed in text or broadcast by voice.

[0057] It can be understood that during the process of controlling the rotation speed of the wire reel 1 to decrease to the lowest rotation speed, if the current rotation speed of the wire reel 1 is greater than the lowest rotation speed, the rotation speed of the wire reel 1 is controlled to decrease, and its essence is to control the rotation speed of the motor to decrease; if the current rotation speed of the wire reel 1 is already the lowest rotation speed, the rotation speed of the wire reel 1 is controlled to remain unchanged.

[0058] When the clothes drying rod is in a stationary state, if the clothes dryer receives a lifting or lowering instruction, first obtain N induced current values. If the difference between any two induced current values is within the first current range, then control the wire reel 1 to rotate. That is, when switching from the stationary state to the moving state, before controlling the wire reel 1 to rotate, through the obtained induced current values, the current number of turns of the lifting rope 2 on the wire reel 1 can be judged, and then the current position of the clothes drying rod can be judged. If the difference between any two induced current values is within the first current range, it means that each induced current value is relatively close, the judgment of the position of the clothes drying rod is relatively accurate, and it can also indicate that the induction device is fault-free.

[0059] Before controlling the wire reel 1 to rotate, if the clothes drying rod is at the highest position and the clothes dryer receives a rising instruction, or, if the clothes drying rod is at the lowest position and the clothes dryer receives a descending instruction, then the first alarm message is sent. Among them, the first alarm message can be "instruction error, unable to rise or descend" displayed in text or broadcast by voice.

[0060] In some embodiments, among the N induced current values obtained before controlling the wire reel 1 to rotate, if the difference between at least two induced current values is not within the first current range, it means that at least two induced current values differ greatly, then the first warning message is sent. At this time, it may be due to a fault in the induction device.

[0061] In some embodiments, for the N induced current values obtained before controlling the wire reel 1 to rotate, if the difference between at least two induced current values is not within the first current range, it means that at least two induced current values differ greatly. To avoid errors, the maximum and minimum values among the N induced current values are removed. Among the remaining all induced current values, if the difference between at least two induced current values is not within the first current range, then the first warning message is sent.

[0062] When the clothes drying rod is in the ascending state, if the induced current value is less than the first set current value and greater than or equal to the third set current value, a second prompt message is sent and the rotation speed of the wire reel 1 is controlled to decrease to the lowest rotation speed. When the clothes drying rod is in the descending state, if the induced current value is greater than the second set current value and less than or equal to the fourth set current value, a second prompt message is sent and the rotation speed of the wire reel 1 is controlled to decrease to the lowest rotation speed. If the induced current value is greater than or equal to the first set current value, or the induced current value is less than or equal to the second set current value, a first prompt message is sent and the wire reel 1 is controlled to stop rotating.

[0063] When the clothes drying rod is in the lifting and lowering state, if the clothes dryer receives a stop instruction, it first controls the wire reel 1 to stop rotating, and then obtains N induced current values. If the difference between any two induced current values is within the first current range, a third prompt message is sent. Among them, the third prompt message can be "arrived at the specified position" displayed in text or broadcast by voice.

[0064] When the clothes drying rod is in the ascending state, if the clothes dryer receives a descending instruction, it first obtains N induced current values. If the difference between any two induced current values is within the first current range, then it controls the wire reel 1 to reverse. By the obtained induced current value, the current number of turns of the lifting and lowering rope 2 on the wire reel 1 can be judged, and then the current position of the clothes drying rod can be judged. According to the received descending instruction, the position that the clothes drying rod is about to reach can be judged, and the wire reel 1 can be controlled to stop rotating when the induced current value reaches the corresponding current value.

[0065] In some embodiments, each time the clothes dryer receives a lifting and lowering instruction, the clothes drying rod is lifted and lowered by a set distance. In some embodiments, the received lifting and lowering instruction is a set distance value. During the process of controlling the rotation of the wire reel 1, the induced current value is obtained in real time until the induced current value reaches the current value corresponding to the set distance value, and then the wire reel 1 is controlled to stop rotating.

[0066] In some embodiments, there are two wire reels 1, and a coil 3 is provided corresponding to each wire reel 1. According to the difference between the induced currents on the two coils 3, the inclination degree of the clothes drying rod is judged. If the difference between the induced currents on the two coils 3 exceeds the first set threshold, an inclination alarm message is sent.

[0067] Example: The highest position of the clothes drying rod is 2 m from the ground, and the lowest position is 1 m from the ground. When the clothes drying rod stops at a certain position between the highest and lowest positions, for example, 1.2 m from the ground, and the clothes drying rod is in a stationary state. If the clothes dryer receives an upward instruction, it first obtains 5 induced current values. If the difference between any two induced current values is within the first current range, it then controls the winding wheel 1 to rotate forward, causing the lifting rope 2 to wind around the winding wheel 1, and the clothes drying rod rises. The current number of turns of the lifting rope 2 on the winding wheel 1 can be determined as N1 according to the average value of the 5 induced current values.

[0068] If the upward instruction received by the clothes dryer is a set distance of 0.5 m, when the clothes drying rod is in the upward state, it implements judging the number of turns of the lifting rope 2 on the winding wheel 1 according to the induced current value. When the number of turns is N2, it means the clothes drying rod has risen 0.5 m, and the control winding wheel 1 stops rotating.

[0069] If the clothes dryer receives an upward instruction and there is no set distance, it is default that the clothes drying rod continues to rise until the highest position or until the clothes dryer receives a stop instruction.

[0070] If the clothes dryer receives an upward instruction and there is no set distance, then each time an upward instruction is received, the clothes drying rod rises 0.2 m until the clothes drying rod rises to the highest position or until the clothes dryer no longer receives a stop instruction.

[0071] Embodiment 2

[0072] Figure 6 and Figure 7 Embodiment 2 is shown, where the same or corresponding components as in Embodiment 1 are adopted with the corresponding reference numerals in Embodiment 1. For simplicity, only the differences between Embodiment 2 and Embodiment 1 are described. The difference lies in that the difference between two adjacent induced current values is the current change rate, and the lifting speed of the clothes drying rod is judged according to the current change rate. Among them, the difference between two adjacent induced current values refers to the difference between the currently detected induced current value and the previously detected induced current value.

[0073] Under normal circumstances, if the current change rate is greater than 0 and remains unchanged, it means the clothes drying rod is rising at a constant speed; if the current change rate is equal to 0 and remains unchanged, it means the clothes drying rod is stationary; if the current change rate is less than 0 and remains unchanged, it means the clothes drying rod is descending at a constant speed.

[0074] When the clothes drying rod is in a stationary state, if the clothes dryer receives a lifting or lowering instruction, after the first set time period, if the current change rate is within the first set range, a second alarm message is issued. If the current change rate is within the first set range, the current lifting or lowering state is maintained.

[0075] Under normal circumstances, when the clothes drying rod is in a stationary state, the current change rate is equal to 0 and remains unchanged. If the clothes dryer receives a lifting or lowering instruction, after the first set duration, the wire winding wheel 1 should be controlled to rotate. At this time, the current change rate should be greater than 0 or less than 0. If the current change rate is within the first set range, it means that the current change rate approaches 0. The first set range is a range relatively close to 0. Within the allowable error range, it means that the wire winding wheel 1 has not rotated. That is to say, after the first set duration since the clothes dryer received the lifting or lowering instruction, there is no response, and then the second alarm message is issued. Among them, after the clothes dryer receives the lifting or lowering instruction, the induced current value will be obtained according to steps S1 and S2 in Embodiment 1. The first set duration is used to obtain N induced current values; the second alarm message can be "Drive failure" displayed in text or broadcast by voice.

[0076] When the clothes drying rod is in the rising state and has not received a stop instruction, if the current change rate decreases sharply or suddenly equals 0, it means that the clothes drying rod is stationary or rising slowly. It may be because a foreign object suddenly exerts a large downward pulling force on the clothes drying rod, making the clothes drying rod heavy and unable to rise. Then, control the wire winding wheel 1 to stop rotating and issue the third alarm message to prevent the lifting rope 2 from breaking. If the current change rate is greater than 0 and remains unchanged, the current lifting state is maintained.

[0077] In the case of issuing the third alarm message, obtain the current weight value G of the clothes drying rod. If the weight value G is greater than the first weight threshold, then issue the third prompt message. Among them, the third prompt message can be "The clothes drying rod is too heavy" displayed in text or broadcast by voice. Among them, the weight value of the clothes drying rod includes the weight of the clothes drying rod itself and the weight of the items hanging on the clothes drying rod. Specifically, the weight value of the clothes drying rod can be obtained through a weight sensor.

[0078] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A method for controlling a clothes drying machine, characterized in that: include: Step S1: cyclically powering on and off the coil sleeved on the outer periphery of the winding wheel through the control circuit; Step S2: Whenever the coil is in a power-off state, the induced current value of the coil is obtained through the current detection component; Step S3: judging the number of turns of the lifting rope on the winding wheel according to the magnitude of the induced current value.

2. The control method of the clothes drying machine according to claim 1, characterized in that: If the induced current value is greater than or equal to the first set current value, or the induced current value is less than or equal to the second set current value, a first prompt message is issued and the winding wheel is controlled to stop rotating.

3. The control method of the clothes drying machine according to claim 2, characterized in that: If the induced current value is less than the first set current value and greater than or equal to the third set current value, or the induced current value is greater than the second set current value and less than or equal to the fourth set current value, a second prompt message is issued and the speed of the winding wheel is controlled to drop to the minimum speed.

4. The control method of the clothes drying machine according to claim 1, characterized in that: When the clothes drying rod is in a stationary state, if the clothes drying machine receives a lifting instruction, N induced current values ​​are first obtained. If the difference between any two induced current values ​​is within the first current range, the winding wheel is controlled to rotate.

5. The control method of the clothes drying machine according to claim 4, characterized in that: Before the winding wheel is controlled to rotate, if the clothes drying rod is at the highest position and the clothes drying machine receives an ascending instruction, or if the clothes drying rod is at the lowest position and the clothes drying machine receives a descending instruction, a first alarm message is issued.

6. The control method of the clothes drying machine according to claim 1, characterized in that: The difference between two adjacent induced current values ​​is the current change rate, and the lifting speed of the clothes drying rod is determined based on the current change rate.

7. The control method of the clothes drying machine according to claim 6, characterized in that: When the clothes drying rod is in a stationary state, if the clothes drying machine receives a lifting instruction, after a first set time, if the current change rate is within a first set range, a second alarm message is issued.

8. The control method of the clothes drying machine according to any one of claims 1 to 7, characterized in that: After step S3, the method further includes: Step S4: Determine the position of the clothes drying rod according to the number of turns of the lifting rope on the winding wheel.

9. A clothes drying machine, characterized in that: include: clothes drying pole; The lifting mechanism comprises a winding wheel and a lifting rope wound around the winding wheel, the clothes drying rod is connected to the lifting rope, the winding wheel is made of non-magnetic material, and the lifting rope is made of magnetic material; The induction device includes a control circuit, a coil and a current detection component. The coil is sleeved on the outer circumference of the winding wheel. The control circuit is used to energize or deenergize the coil. The current detection component is used to detect the current value in the coil.

10. The clothes drying machine according to claim 9, characterized in that: The lifting mechanism further includes a first guide wheel, which is located in a space surrounded by the coils. The lifting rope is wound around the first guide wheel and extends parallel to the axial direction of the coil under the guidance of the first guide wheel.

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