Control method of clothes treating apparatus

Abstract

The present application relates to a control method of a laundry treating apparatus, the control method comprising: a heating step of heating a drum by a heating portion that induces an eddy current in the drum; and an operation execution step of alternately executing a stirring operation of rotating the drum with a first number of revolutions generating a centrifugal force of less than 1 G and a heat transfer operation of rotating the drum with a second number of revolutions generating a centrifugal force of 1 G or more, the ratio between the execution time of the stirring action and the execution time of the heat transfer action is set to be different according to the dryness of the clothes.

Description

Technical Field

[0001] The present application relates to a control method of a clothing processing device. Background Art

[0002] The clothing processing apparatus is an apparatus capable of washing, drying, or washing / drying clothing (washing objects or drying objects), and is a concept including washing machines, drying machines, and washing machines having a drying function.

[0003] Clothes treating devices (dryers) capable of drying clothes are classified into exhaust type drying systems and circulation type drying systems according to how heated air (hot air) is processed after being supplied to the clothes and exchanging heat with the clothes.

[0004] The circulation drying system is a method in which the exhausted air is dehumidified and heated in sequence in the storage space for storing clothes and then supplied to the storage space. The exhaust drying system is a method in which the heated air is supplied to the storage space and the air exhausted from the storage space is discharged to the outside of the clothing processing device.

[0005] Since the drying time required for the clothes to reach the set target dryness is determined by the effect of heat exchange between the air supplied to the drum and the clothes, the clothing processing device with any drying system regards the control for improving the efficiency of heat exchange between the air supplied to the inside of the drum and the clothes as a very important design consideration in the clothing processing device for the purpose of drying clothes.

[0006] In the existing clothes treating apparatus, heat exchange efficiency is improved by controlling the number of revolutions or the rotating direction of the drum during air supply to the drum.

[0007] During supply of heated air to the drum, since the conventional laundry treating apparatus controls the number of revolutions of the drum to be low, the laundry repeatedly rises and falls inside the drum, and thus a problem of significant shrinkage of the laundry may occur.

[0008] The shrinkage of clothes is caused by complex factors such as the magnitude of the external force supplied to the clothes, the dryness of the clothes, the temperature of the air supplied to the clothes, and the time (drying time) during which the hot air is supplied to the clothes. The magnitude of the external force supplied to the clothes can be regarded as the biggest factor that aggravates the shrinkage of the clothes. Therefore, the existing control method of continuously and repeatedly performing the rising and falling of the clothes during the period when the heated air is supplied to the drum is likely to aggravate the shrinkage of the clothes.

[0009] In the conventional clothes treating apparatus, there is a case where the drum is rotated at a high number of revolutions (a number of revolutions at which a centrifugal force of 1 G or more is generated) during supply of heated air to the drum (Grant No. 10-1594368).

[0010] In the conventional laundry processing device, when heated air is supplied to the drum, the laundry is kept in close contact with the circumferential surface of the drum, thereby minimizing the external force supplied to the laundry. Since the drying mechanism of the laundry processing device is heat transfer by convection, it takes a long time to dry.

[0011] In addition, in the method of supplying heated air while keeping the clothes in close contact with the circumferential surface of the drum, the dryness of the surface exposed to the air (the surface of the clothes facing the rotation center of the drum) and the surface not exposed to the air (the surface in contact with the circumferential surface of the drum) will be different. This not only means a decrease in the heat exchange efficiency between the air supplied to the drum and the clothes, but also may cause damage to the heated part of the clothes or accelerate shrinkage.

[0012] On the other hand, in order to dry the clothes, the drying program (drying step) performed by the clothes treating device can be divided into a preheating period, a constant drying rate period and a falling drying rate period.

[0013] The preheating stage is a stage in which the dryness of the clothes hardly changes and the temperature of the clothes gradually rises (the temperature of the clothes gradually rises to a temperature at which moisture is discharged from the clothes), the constant rate drying stage is a stage in which the dryness of the clothes rises sharply and the temperature of the clothes remains almost constant, and the reduced rate drying stage is a stage in which the dryness of the clothes hardly changes and the temperature of the clothes rises sharply.

[0014] According to experiments, it is confirmed that the more the execution time of the reduced rate drying stage is increased and the more the temperature of the air supplied to the clothes is increased during the reduced rate drying stage, the more the clothes shrink. Since the above-mentioned conventional clothes treating apparatus does not have a control method for shortening the execution time of the reduced rate drying stage or a control method for adjusting the temperature of the air supplied to the clothes during the execution of the reduced rate drying stage, it is difficult to prevent the clothes from shrinking. Summary of the invention

[0015] Problems to be solved by the invention

[0016] The problem to be solved by the present application is to provide a control method for a clothes treating device which can reduce the shrinkage phenomenon of clothes.

[0017] In addition, the present application aims to provide a method for controlling a clothes treating device which can control the external force applied to the clothes, thereby minimizing the shrinkage of the clothes.

[0018] In addition, the problem to be solved by the present application is to provide a control method for a clothes processing device which can shorten the time required for drying clothes and minimize the shrinkage of clothes.

[0019] In addition, the present application aims to provide a method for controlling a clothes treating apparatus that can control the amount of heat energy supplied to clothes, thereby minimizing the shrinkage of the clothes.

[0020] Technical solutions to the problem

[0021] The present application provides a control method for a clothes treating device, wherein the clothes treating device comprises: an outer tub for storing water; a drum disposed inside the outer tub and storing clothes; and a heating part for forming an eddy current in the drum and heating the drum.

[0022] The control method may include: an action execution step, alternately executing a stirring action of rotating the drum at a first number of revolutions to generate a centrifugal force less than 1G and a heat transfer action of rotating the drum at a second number of revolutions to generate a centrifugal force greater than 1G; and a heating step, operating the heating part and heating the drum, and the ratio of the execution time of the stirring action to the execution time of the heat transfer action can be set differently according to the dryness of the clothes.

[0023] In the control method, when the dryness of the clothes reaches a preset reference dryness, the execution time of the heat transfer action may be set to be longer than the execution time of the stirring action.

[0024] In the control method, when the dryness of the clothes is less than a preset reference dryness, the execution time of the stirring action and the execution time of the heat transfer action may be set to be the same.

[0025] In the control method, a rotation direction of the drum set in the stirring action and a rotation direction of the drum set in the heat transfer action may be set to be the same.

[0026] The first number of revolutions may be set to a number of revolutions at which the laundry performs a falling motion, a rolling motion, or a sliding motion at a height below a horizontal line passing through a rotation center of the drum.

[0027] The drying step consisting of the heating step and the heat exchange step can be divided into a preheating period, a constant drying rate period and a falling drying rate period, and the reference dryness can be set to a value between the maximum dryness and the minimum dryness of the constant rate drying period.

[0028] The reference dryness may be set to a dryness at which the moisture content of the laundry is 30% to 20%.

[0029] The heating step may be started simultaneously with the action execution step, or may be started after the action execution step is started.

[0030] The heating step may be performed before the action execution step is started, and the interval between the start time point of the heating step and the start time point of the action execution step may be set to be within a preset reference time.

[0031] The control method may further include a dehydrating step of separating water in the laundry by rotating the drum at a number of revolutions generating a centrifugal force of 1 G or more, starting before performing the heating step and the action performing step.

[0032] The control method may further include a stirring and heating step of heating the drum by operating the heating unit while the drum is rotated at a number of revolutions that generates a centrifugal force of less than 1G, starting before the dehydrating step.

[0033] The number of rotations of the drum set in the stirring and heating step may be set to be less than the number of rotations of the drum set in the stirring action.

[0034] The heating step may be configured to control the temperature of the drum so that the temperature of the laundry is maintained below 90 degrees Celsius.

[0035] The heating step may be arranged to maintain the temperature of the drum below 100 degrees Celsius.

[0036] The control method may further include a cooling step of lowering the temperature of the laundry by rotating the drum when the heating step and the action performing step are finished.

[0037] The number of revolutions set in the cooling step may be set lower than the first number of revolutions.

[0038] Effects of the Invention

[0039] The present application provides a control method for a clothing processing device capable of reducing the shrinkage phenomenon of clothing.

[0040] In addition, the present application provides a control method of a clothes treating apparatus capable of controlling an external force supplied to clothes, thereby minimizing a shrinkage phenomenon of the clothes.

[0041] In addition, the present application provides a control method of a clothes treating apparatus capable of shortening the time required for drying clothes, thereby minimizing the shrinkage of clothes.

[0042] In addition, the present application provides a control method of a clothes treating apparatus capable of controlling the amount of heat energy supplied to clothes, thereby minimizing a shrinkage phenomenon of the clothes. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 and Figure 2 An example of a clothes treating apparatus is shown.

[0044] Figure 3 , Figure 4 as well as Figure 5 An example of the heating unit is shown.

[0045] Figure 6 An example of the heating step and the heat transfer step is shown.

[0046] Figure 7 (a) shows an example of a stirring action, Figure 7 (b) shows an example of the transfer action.

[0047] Figure 8 An example of a control method consisting of a first drying step and a second drying step is shown. DETAILED DESCRIPTION

[0048] Hereinafter, embodiments of a laundry processing device and a control method thereof are described in detail with reference to the accompanying drawings. The configuration of the device or the control method described below is provided only for illustrating embodiments of the laundry processing device and is not intended to limit the scope of the present application. Throughout the specification, the same reference numerals indicate the same components.

[0049] like Figure 1 As shown, the clothing treatment device 100 can be configured to include: a box body 1, which is provided with an inlet 11; an outer barrel 2, which is arranged inside the box body 1 and stores water; and a drum 3, which is rotatably arranged inside the outer barrel and accommodates the treatment object (hereinafter referred to as "clothing").

[0050] The input port 11 may be disposed on the front side of the box body 1 , and may be configured to be closed by a door 12 rotatably coupled to the box body 1 .

[0051] A control panel 13 may be provided on the box 1. Figure 1An example is shown in which the control panel 13 is provided at a position above the input port 11 in the front surface of the box body 1 .

[0052] The control panel 13 may be provided with an input unit 131 and a display unit 132. The input unit 131 may be provided as a mechanism for receiving control instructions from a user, and the display unit 132 may be provided as a mechanism for displaying control instructions selectable by a user and displaying information for executing the control instructions selected by the user.

[0053] like Figure 2 As shown, the outer barrel 2 can be formed by an outer barrel body 21 arranged inside the box body 1 and providing a space for storing water. The outer barrel body 21 can be formed by a hollow cylinder, and an outer barrel input port 22 can be set on one side of the cylinder.

[0054] The outer barrel body 21 can be fixed inside the box body 1 through a support portion. Figure 2 An example is shown in which the support portion is formed by a spring 24 connecting an upper portion of a circumferential surface of the outer tub body 21 to the box body 1 and a damper 25 connecting a lower portion of a circumferential surface of the outer tub body 21 to the box body 1 .

[0055] The outer barrel inlet 22 may be provided to be connected to the inlet 11 via a gasket 23. In order to prevent the water stored in the outer barrel body 21 from leaking into the box body 1, the gasket 23 may be formed by a pipe connecting the inlet 11 and the outer barrel inlet 22. In addition, in order to minimize the transmission of vibration of the outer barrel body 21 to the box body 1, the gasket 23 may be formed of an elastic material such as rubber.

[0056] The drum 3 may include a drum body 31 disposed inside the outer tub body 21 and providing a space for storing clothes.

[0057] The drum body 31 may be formed of a hollow cylinder, and a drum inlet 32 ​​may be formed on one side of the cylinder (the side facing the direction of the outer barrel inlet). The drum body 31 is preferably made of a conductor.

[0058] A connecting hole 33 connecting the interior of the drum body 31 with the interior of the outer barrel body 21 may be provided on the circumferential surface of the drum body 31, and a lifting member may be formed on the circumferential surface of the drum body 31 to raise the clothes inside the drum body 31 when the drum body 31 rotates.

[0059] The drum body 31 may be rotatably fixed to the outer tub body 21 via a driving unit 4 .

[0060] The driving unit 4 can be configured to include: a stator 41, which is fixed to the back side of the outer barrel body 21 and forms a rotating magnetic field when current is supplied; a rotor 42, which is located outside the outer barrel body 21 to rotate through the rotating magnetic field; and a rotating shaft 43, which passes through the back side of the outer barrel body 21 and connects the rotor 42 and the back side of the drum body 31.

[0061] The outer tub body 21 may receive water through the water supply part 5 , and the water stored in the outer tub body 21 may be discharged to the outside of the outer tub body 21 through the drainage part 6 .

[0062] The water supply unit 5 may be configured to include: a water supply pipe 52 connecting a water supply source 51 with the outer barrel body 21 ; and a water supply valve 53 controlling the opening and closing of the water supply pipe 52 according to a control signal of the control unit 91 .

[0063] The drainage part 6 may include: a pump 61 ; a first drainage pipe 62 connecting the outer tub body 21 with the pump 61 ; and a second drainage pipe 63 guiding the water discharged from the pump 61 to the outside of the housing 1 .

[0064] The laundry treating apparatus 100 may further include a supply unit 7 for supplying detergent to the outer tub body 21. The supply unit 7 may include a drawer drawn out from the front of the housing 1 and a storage space provided in the drawer for storing detergent.

[0065] Figure 2 An example of a case where the storage space is provided to connect the water supply pipe 52 and the outer tub body 21 is shown. In this case, the water supply pipe 52 may be formed by a first water supply pipe 521 that guides water supplied from the water supply source 51 to the storage space and a second water supply pipe 522 that guides detergent and water discharged from the storage space to the outer tub body 21.

[0066] The laundry processing apparatus 100 may further include a heating unit 8 for heating the drum body 31 .

[0067] The heating unit 8 may generate an eddy current in the drum body 21 by electromagnetic induction. As a mechanism for heating the drum body 21 , an induction heater may be exemplified.

[0068] like Figure 3As shown, the heating part 8 is preferably disposed in a space located above a horizontal line H (a horizontal line passing through the rotation center of the drum body) passing through the center of the drum body in the circumferential surface of the outer barrel body 21. This is because the absence of water between the heating part 8 and the drum body 31 is conducive to heating the drum body 31.

[0069] like Figure 4 As shown, the heating part 8 can be configured to include: a cover body 81 fixed to the upper space of the outer barrel body 21; a coil 82 fixed to the cover body 81; and a cover 83 fixed to the cover body 81 and preventing the coil 82 from being exposed.

[0070] In order to prevent the coil 82 from overheating, a cooling unit 84 may be provided on the cover 83. The cooling unit 84 may be formed by a fan that discharges air in the space formed by the cover 81 and the cover 83 to the outside. Figure 5 As shown, the coil 82 may be fixed to the cover 81 , and the current supplied to the coil 82 may be controlled by the control unit 91 .

[0071] like Figure 2 As shown, the laundry treating apparatus 100 may further include a detection unit 92 for detecting the amount of foam inside the tub body 21. The detection unit 92 may be formed of a water level detection unit for detecting the amount of water supplied to the tub body 21.

[0072] As shown in the figure, the water level detection unit may be formed by a communication pipe 921 connected to the first drain pipe 62 and a sensor 922 generating a control signal according to the pressure inside the communication pipe 921 .

[0073] One end of the connecting pipe 921 may be connected to the first drain pipe 62 , and the other end may be formed by a hose fixed inside the box body 1 at a position higher than the highest water level of the outer barrel body 21 or at a position higher than the horizontal line H.

[0074] The connecting pipe 921 is closed by the sensor 922, and the water level inside the connecting pipe 921 changes in the same manner as the water level inside the outer barrel body 21. Therefore, the sensor 922 can transmit a control signal corresponding to the pressure inside the connecting pipe 921 according to the change in the water level inside the outer barrel body 21 to the control unit 91, and the control unit 91 can determine the water level inside the outer barrel body 21 through the control signal provided by the sensor 922.

[0075] On the other hand, when bubbles are generated inside the outer tub body 21 due to the rotation of the drum body 31, etc., the pressure inside the connecting pipe 921 increases. Therefore, when the sensor 922 detects that the pressure inside the connecting pipe 921 increases without additional water supply from the water supply part 5 during the operation of the laundry processing device 100, the control part 91 can estimate whether bubbles are generated in the outer tub body 21 and the amount of bubbles generated.

[0076] Although not shown, the detection unit 92 may be formed of a current detection unit that detects the amount of current supplied to the stator 41 or a rotation number detection unit that detects the number of rotations of the drum body 31 .

[0077] When foam is generated inside the outer barrel body 21, the resistance that prevents the rotation of the drum body 31 increases, so in order to rotate the drum body 31 at a preset number of revolutions, it is necessary to increase the amount of current supplied to the stator 41. On the other hand, in a state where the amount of current supplied to the stator 41 is kept constant, if foam is generated inside the outer barrel body 21, the number of revolutions of the drum body 31 will decrease. Therefore, the control unit 91 can infer whether foam is generated in the outer barrel body 21 and the amount of foam generated through the control signal provided by the current detection unit or the number of revolutions detection unit.

[0078] The laundry treating apparatus 100 may further include a temperature detecting unit 93 for measuring the temperature inside the outer tub body 21 . Figure 2 An example is shown in which the temperature detector 93 is provided and fixed to the upper space of the circumferential surface of the tub body 21 and detects the temperature between the tub body 21 and the drum body 31 .

[0079] Figure 6 An example of a control method of a clothes treating apparatus for minimizing shrinkage of clothes is shown.

[0080] The control method may be configured to sequentially execute the first drying step S10 and the second drying step S20, or may be configured to only execute the second drying step S20.

[0081] The second drying step S20 may be configured to include: a heating step S21, heating the drum body 31 by operating the heating unit 8; and an action execution step S22, moving the clothes inside the drum body in order to transfer the heat energy of the drum body 31 to the clothes.

[0082] The action execution step S22 is configured to alternately execute an agitation action M1 of rotating the drum body 31 at a first rotation speed generating a centrifugal force less than 1G and a heat transfer action M2 of rotating the drum body 31 at a second rotation speed generating a centrifugal force greater than 1G.

[0083] like Figure 7 As shown in (a), the stirring action M1 is an action of rotating the drum body 21 at a speed that generates a centrifugal force less than 1G on the clothes. When the stirring action M1 is performed, the clothes will repeatedly rise and fall inside the drum body 31.

[0084] On the other hand, the heat transfer action M2 is an action of rotating the drum body 21 at a rotation speed that generates a centrifugal force of 1G or more on the clothes, such as Figure 7 As shown in (b), when the heat transfer action M2 is performed, the clothes rotate in a state of being in close contact with the circumferential surface of the drum body 31.

[0085] Since the action execution step S22 is performed together with the heating step S21, the heat transfer action M2 is an action for transferring heat energy to the clothes by heat conduction, and the stirring action M1 is an action for transferring heat energy to the clothes by changing the area where the clothes are in contact with the circumferential surface of the drum body 31 and heat conduction. That is, the stirring action M1 guides the heat energy to be uniformly supplied to all areas of the clothes by changing the area where the clothes are in contact with the drum body, and the heat transfer action M2 quickly supplies heat energy to the side of the clothes in contact with the drum body.

[0086] Since the second drying step S20 transfers heat energy to the clothes by conduction, heat energy can be supplied to the clothes more efficiently than the existing method of supplying heat energy to the clothes by convection of air.

[0087] The first number of revolutions set in the stirring action M1 may be set to a number of revolutions at which the laundry falls from above a horizontal line H passing through the rotation center of the drum, or may be set to a number of revolutions at which the laundry falls near the horizontal line H. Considering that there is a tendency that the smaller the external force applied to the laundry, the lower the possibility of shrinkage of the laundry, the first number of revolutions is preferably set to a number of revolutions at which the laundry falls at or below the horizontal line H.

[0088] Preferably, the rotation direction of the drum in the stirring action M1 and the rotation direction of the drum in the heat transfer action M2 are set to be the same. This is because when the stirring action M1 is converted to the heat transfer action M2 and the heat transfer action M2 is converted to the stirring action M1, setting the rotation directions of the two actions to be the same can minimize the time and energy required for the action conversion and the vibration of the drum body.

[0089] On the other hand, it is preferable that the ratio (T1:T2) of the execution time T1 of the stirring action and the execution time T2 of the heat transfer action is set to be different according to the dryness of the clothes.

[0090] like Figure 8 As shown, the drying step of the clothes is divided into a preheating period S201 (preheating period), a constant drying rate period S202 (constant drying rate period) and a falling drying rate period S203 (falling drying rate period).

[0091] The preheating stage S201 is a stage in which the dryness of the clothes hardly changes (a stage in which the moisture content hardly changes), the constant rate drying stage S202 is a stage in which the dryness of the clothes increases sharply (a stage in which the moisture content decreases sharply), and the reduced rate drying stage S203 is a stage in which the dryness of the clothes hardly changes and the temperature of the clothes increases sharply.

[0092] In the preheating stage S201, since the clothes are in a state of containing more water, even if the number of times the clothes are dropped increases, it will not have a significant impact on the shrinkage of the clothes. However, in the constant rate drying stage S202 and the reduced rate drying stage S203, since the clothes are in a state of containing less water, when the number of times the clothes are dropped increases, the shrinkage of the clothes will be aggravated. Therefore, in the action execution step S22, the higher the dryness of the clothes (the lower the moisture content), the execution time T2 of the heat transfer action is set to be longer than the execution time T1 of the stirring action.

[0093] Figure 8 An example is shown in which when the dryness of the clothes is less than a preset reference dryness, the execution time T1 of the stirring action and the execution time T2 of the heat transfer action are set to be the same, and when the dryness of the clothes reaches the reference dryness, the execution time T2 of the heat transfer action is set to be longer than the execution time T1 of the stirring action.

[0094] When the dryness of the clothes is less than a preset reference dryness, the execution time T1 of the stirring action may also be set to be longer than the execution time T2 of the heat transfer action. However, if the execution time T2 of the heat transfer action is shortened when the clothes have not reached the reference dryness, the time of the preheating stage S201 becomes longer, resulting in an increase in the time for performing the second drying step S20.

[0095] The reference dryness (or reference moisture content) may be set as the dryness (or moisture content) of the clothes when they enter the constant rate drying stage S202. Figure 8 An example is shown in which the reference dryness is set to a dryness at which the moisture content of the laundry is 30% to 20%.

[0096] The heating step S21 can be set to start at the same time as the action execution step S22, or set to start after the action execution step S22 starts. This is because when the heating unit 8 is operated in a state where the drum body 31 is not rotating, there is a possibility that the clothes will be damaged. Therefore, if the heating step S21 starts before the action execution step S22 starts, the interval between the start time point of the heating step S21 and the start time point of the action execution step S22 is preferably set to be within a preset reference time.

[0097] The reference time may be set by the control unit 91 according to the type of clothes. That is, when the user selects the type of clothes to be dried through the input unit 131, the control unit 91 may set the reference time differently according to the type of clothes. The reference time is preferably set such that the weaker the durability of the clothes, the shorter the reference time.

[0098] On the other hand, even if the execution time T2 of the heat transfer action is set to be longer than the execution time T1 of the stirring action in the second half of the second drying step S20, there is a possibility that the time of the reduced-rate drying stage S203 will be prolonged, thereby increasing the heat energy supplied to the clothes and aggravating the shrinkage of the clothes.

[0099] In order to shorten the execution time of the second drying step S20, a first drying step S10 may also be provided in the control method.

[0100] The first drying step S10 may be formed by the stirring and heating step S11 and the dehydrating step S12 which are sequentially performed before starting the second drying step S20, or may be formed by only the dehydrating step S12.

[0101] The dehydration step S12 is a step of separating water from the clothes by rotating the drum body 31 only at a dehydration speed without operating the heating unit 8. The dehydration speed is a speed at which the clothes generate a centrifugal force of 1G or more, and is preferably set to a speed higher than the second speed.

[0102] Since the water in the clothes is removed by executing the dehydration step S12 before starting the second drying step S20, the control method can reduce the water contained in the clothes through the dehydration step S12, so the control method can shorten the execution time of the second drying step S20. Since the shortening of the second drying time S20 refers to shortening the time that the clothes are exposed to high temperature in the second half of the constant rate drying stage S202 and the reduced rate drying stage S203, the control method provided with the dehydration step S12 can more effectively prevent the shrinkage of the clothes.

[0103] The amount of water separated from the clothes by the dehydration step S12 increases with the temperature of the clothes. Therefore, the first drying step S10 may further include a stirring and heating step S11 performed before the dehydration step S12.

[0104] The stirring and heating step S11 is a step of operating the heating unit 8 while the drum body 31 is rotated at a rotation speed that generates a centrifugal force of less than 1G on the laundry.

[0105] The number of revolutions of the drum body 31 set in the stirring and heating step S11 may be set to be the same as the first number of revolutions, or may be set to be lower than the first number of revolutions. However, if the number of revolutions of the drum body set in the stirring and heating step S11 is set to be lower than the first number of revolutions, the clothes roll or slide along the circumferential surface of the drum body 31, and thus the effect of increasing the contact time between the clothes and the drum body 31 (the effect of raising the temperature of the clothes more quickly) can be expected.

[0106] On the other hand, the higher the temperature of the clothes, the more severe the shrinkage of the clothes. Therefore, the control method can control the temperature of the drum body 31 so that the temperature of the clothes is maintained below 90 degrees Celsius in the second drying step S20.

[0107] In the existing laundry processing apparatus, since heated air is supplied to the drum body, the laundry exchanges heat with the air by convection, so it is difficult to control the temperature of the laundry. However, in the laundry processing apparatus 100, since the drum body 31 is heated by the heating unit 8, the laundry is heated by conductive heat transfer, so it is relatively easy to control the temperature of the laundry. An example of a method of keeping the temperature of the laundry below 90 degrees Celsius may be to keep the temperature of the drum body 31 below 100 degrees Celsius.

[0108] Furthermore, the control method may also be configured to include: a cloth amount determination step for determining the amount of clothes put into the drum body 31; and a temperature setting step for setting the maximum temperature of the drum body 31 according to the cloth amount.

[0109] The maximum temperature determined in the temperature setting step is preferably set to a temperature at which the temperature inside the outer barrel is below 90 degrees Celsius, and the temperature inside the outer barrel 2 can be measured by the temperature detection unit 93 .

[0110] When the second drying step S20 is finished, the control method may perform a cooling step S30. The cooling step S30 is a step of reducing the temperature of the clothes by rotating the drum body 31 only without operating the heating unit 8. The lower the number of revolutions of the drum body 31 set in the cooling step S30, the more advantageous it is to prevent shrinkage of the clothes or damage to the clothes. Therefore, in the cooling step S30, the number of revolutions of the drum body 31 is preferably set to a number of revolutions at which the clothes generate a centrifugal force of less than 1G and lower than the first number of revolutions.

[0111] The above-mentioned clothes processing device can be implemented in various modified forms, and the scope of rights of the present application is not limited to the above-mentioned embodiments.

Claims

1. A control method for a clothes processing device, characterized in that: The laundry processing device comprises: an outer tub for storing water; a drum disposed inside the outer tub for storing laundry; and a heating unit for forming an eddy current in the drum and heating the drum. Wherein, the control method of the clothes processing device includes: an action execution step of alternately executing an agitation action of rotating the drum at a first rotation number that generates a centrifugal force less than 1G and a heat transfer action of rotating the drum at a second rotation number that generates a centrifugal force greater than 1G; and a heating step of operating the heating unit to heat the drum, When the dryness of the clothes reaches a preset reference dryness, the execution time of the heat transfer action is set to be longer than the execution time of the stirring action.

2. The control method of the clothes processing device according to claim 1, characterized in that: When the dryness of the clothes is less than a preset reference dryness, the execution time of the stirring action and the execution time of the heat transfer action are set to be the same.

3. The control method of the clothes processing device according to claim 1, characterized in that: The rotation direction of the drum set in the stirring action is the same as the rotation direction of the drum set in the heat transfer action.

4. The control method of the clothes processing device according to claim 1, characterized in that: The first number of revolutions is set to be a number of revolutions at which the laundry performs a falling motion, a rolling motion, or a sliding motion at a height below a horizontal line passing through a rotation center of the drum.

5. The control method of the clothes processing device according to claim 1, characterized in that: The drying step consisting of the heating step and the heat exchange step is divided into a preheating stage, a constant rate drying stage and a reduced rate drying stage, and the reference dryness is set to a value between the maximum dryness and the minimum dryness of the constant rate drying stage.

6. The control method of the clothes processing device according to claim 1, characterized in that: The reference dryness is set to a dryness at which the moisture content of the laundry is 30% to 20%.

7. The control method of a clothes processing device according to any one of claims 1 to 6, characterized in that: The heating step is started simultaneously with the action execution step, or is started after the action execution step is started.

8. The control method of a clothes processing device according to any one of claims 1 to 6, characterized in that: The heating step is performed before the action execution step is started, and the interval between the start time point of the heating step and the start time point of the action execution step is set to be within a preset reference time.

9. The control method of the clothes processing device according to claim 1, characterized in that: The method further includes a dehydration step of separating water from the laundry by rotating the drum at a number of revolutions that generates a centrifugal force of 1G or more, starting before performing the heating step and the action execution step.

10. The control method of the clothes processing device according to claim 9, characterized in that: The method further includes a stirring and heating step of heating the drum by operating the heating unit while the drum is rotated at a rotation speed that generates a centrifugal force less than 1G, starting before the dehydration step.

11. The control method of the clothes processing device according to claim 10, characterized in that: The number of rotations of the drum set in the stirring and heating step is set to be less than the number of rotations of the drum set in the stirring operation.

12. The control method of the clothes processing device according to claim 1, characterized in that: The heating step controls the temperature of the drum so that the temperature of the laundry is maintained below 90 degrees Celsius.

13. The control method of the clothes processing device according to claim 12, characterized in that: The heating step maintains the temperature of the drum below 100 degrees Celsius.

14. The control method of the clothes processing device according to claim 12, characterized in that: The method further includes a cooling step of lowering the temperature of the laundry by rotating the drum when the heating step and the action performing step are completed.

15. The control method of the clothes processing device according to claim 14, characterized in that: The number of revolutions set in the cooling step is set lower than the first number of revolutions.

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