KR101565405B1 - A Luandry Dryer and a Controlling Method of the Laundry Dryer - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a drying apparatus for judging whether a laundry is dry or not using a humidity sensor and a control method thereof. In the present invention, the laundry is dried without measuring the humidity sensor during a minimum drying time set according to the amount of laundry (hereinafter referred to as a laundry amount), and after the minimum drying time, the humidity measured using the humidity sensor is lower than the reference humidity The present invention relates to a drying apparatus and a control method thereof that can accurately determine whether or not a laundry is dried by terminating the operation of the drying apparatus despite the set maximum drying time.

Drying device, drying degree, humidity, humidity sensor, heat pump

Description

[0001] The present invention relates to a drying device and a control method thereof,

The present invention relates to a drying apparatus for drying laundry and a control method thereof.

The drying apparatus is a household appliance that normally uses the high-temperature air to dry the laundered laundry. Generally, the drying apparatus includes a drum for containing a material to be dried, a driving source for driving the drum, a heating means for heating the air flowing into the drum, a blower unit for sucking or discharging air in the drum, and the like .

The drying apparatus can be classified into an electric drying apparatus and a gas drying apparatus according to the heating method of heating the air.

The electric drying apparatus heats the air using electric resistance heat, and the gas drying apparatus heats the air by using the heat generated by the combustion of the gas.

If the drying apparatus is divided by another method, it can be classified into a condensing drying apparatus and an exhaust drying apparatus. In the condensing type drying apparatus, the air in the drum is heat-exchanged with the drying object to circulate the humidified air without being discharged to the outside of the drying apparatus, and the condensed water is heat-exchanged with the outside air in a separate condenser to discharge it to the outside. In the exhaust type drying apparatus, the air in the drum is heat-exchanged with the drying object and becomes humid, and is directly discharged to the outside of the drying apparatus.

If the drying apparatus is divided into another type, it can be divided into a top loading method and a front loading type depending on the method of loading the drying object into the drying apparatus. In the top loading method, the laundry is loaded at the top of the drying apparatus. In the front loading method, the laundry is loaded at the front of the drying apparatus.

Meanwhile, the conventional drying apparatus has a structure capable of measuring the degree of drying so that the drying degree of the drying object can be judged by itself and the completion of the drying process can be controlled by itself.

However, in the conventional drying apparatus and the control methods thereof, there is a large error between the measured drying degree and the actual drying degree, thereby causing the drying apparatus to operate more than necessary to waste power.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a drying apparatus and a control method thereof capable of accurately measuring the drying degree of laundry.

Another object of the present invention is to provide a drying apparatus and a control method thereof that can minimize the amount of electric power used in drying laundry.

In order to solve the above-mentioned problems, the present invention provides a method for detecting laundry, comprising the steps of detecting a laundry amount deposited in a drying space, a drying time setting step of setting a drying time of the laundry according to the detected laundry amount, A humidity measuring step of measuring the humidity of the air discharged from the drying step after the lapse of the set drying time, and a step of finishing the drying step when the measured humidity is lower than the predetermined reference humidity .

In this case, in the control method of the present invention, when the humidity measured in the humidity measuring step is higher than the reference humidity, the drying step is controlled to be performed again.

In the drying time setting step, a minimum drying time and a maximum drying time are set according to the laundry amount sensed in the laundry amount sensing step, and the humidity measuring step is performed after the minimum drying time elapses can do.

In this case, when the progressing time of the drying step reaches the maximum drying time, the step of finishing the drying step is performed even if the humidity measured in the humidity measuring step is higher than the reference humidity.

Further, the control method of the present invention may further include a display step of displaying the humidity measured in the humidity measurement step on the outside of the drying apparatus.

According to another aspect of the present invention, there is provided an air conditioner comprising: an inlet duct through which a humid air flows into a drying space; a hot air supply unit that dehumidifies and heats humid air flowing into the inlet duct; And a humidity sensor for measuring the humidity of the air circulating through the drying space.

In this case, the hot air supply unit may be an evaporator that evaporates the refrigerant to dehumidify the air flowing into the inlet duct, and a condenser that condenses the refrigerant to heat the dehumidified air.

The humidity sensor may be provided in the inlet duct to measure the humidity of the air flowing into the evaporator.

In addition, the drying apparatus of the present invention may further include a display unit for displaying the humidity measured by the humidity sensor.

INDUSTRIAL APPLICABILITY The present invention can provide a drying apparatus and a control method thereof capable of accurately measuring the degree of drying of laundry.

Further, the present invention can provide a drying apparatus and a control method thereof capable of minimizing the amount of electric power used in drying laundry.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein are synonymous with the ordinary meaning of the term as understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the term used herein, According to the defined definition. It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the invention, .

FIG. 1 is a conceptual diagram of a drying apparatus according to the present invention, showing only a part of a front portion 11 of a cabinet in order to show both the front surface of the cabinet 1 and the inside of the cabinet.

1, the drying apparatus 100 includes a cabinet 1, a drying space 3, an inlet duct 5, a hot air supply unit 7, And duct (9).

Prior to the description of each constitution of the drying apparatus 100, the feature of the position of the hot air supply unit 7 will be described first.

It is preferable that the hot air supply unit 7 is provided in the internal space of the cabinet 1.

The cabinet 1 may be provided in a space formed by the bottom surface of the cabinet 1 and the drying space 3 or may be provided in a space formed by the bottom surface of the cabinet 1 and the drying space 3, And the hot air supply unit 7 may be provided inside thereof.

Providing the hot air supply unit 7 inside the drying apparatus 100 has the effect of preventing the external shape of the drying apparatus from becoming large by utilizing the space provided between the drying space 3 and the drying apparatus .

However, when the heat pump module is provided with a separate housing that is separate from the drying space 3, the housing may be configured to be drawn out in the form of a drawer to the front of the drying apparatus.

This makes it possible to easily check the hot air supply unit 7 by pulling out the housing to the front of the drying apparatus when there is an abnormality in the hot air supply unit 7 and to prevent the appearance of the drying apparatus from becoming large .

In this case, the inflow duct 5 and the outflow duct 9 may have a separate structure (for example, a flexible tube (not shown), which may be communicated with the hot air supply unit 7 even when the housing is drawn out to the front of the drying apparatus ) ', And the' separate structure 'is preferably made of a stretchable material.

The inlet duct 5 and the outlet duct 9 are separated from the drying space 3 when the housing is drawn out to the front of the drying apparatus 100. When the housing is drawn into the drying apparatus, And does not exclude the form connected to the space (3).

Hereinafter, each configuration of the drying apparatus 100 of the present invention will be described with reference to the case where the hot air supply unit 7 is provided in the cabinet 1 without the housing (refer to FIG. 1).

The cabinet 1 includes a drying space 3 inside the drying apparatus 100 and has a structure for vibration damping such as a spring and a damper for supporting the drying space 3 .

The cabinet 1 is provided with a front part 11 in the direction in which laundry is loaded and a display unit P, an alarm unit A, a door 111 and a drying unit 100, And an operation unit (not shown) for controlling the operation of the apparatus.

The display means P can not only display the humidity measured by the humidity sensor in cooperation with the humidity sensor S to be described later but also display the humidity of the air discharged from the drying space 3 by the humidity sensor, .

However, the display means P may be implemented using a display means such as an LCD in a conventional drying apparatus and a drying and washing apparatus, or may be separately provided to realize only the functions described above.

The alarm means A is for informing the user that the drying of the laundry has been completed or informing the user of the malfunction of the drying apparatus 100.

The door 111 is provided on the front portion 11 of the cabinet 1 and is configured to be opened and closed so that the laundry can be input into the drying space 3 to be described later.

Therefore, the door 111 may be hinged to the front portion 11.

The drying space (3) is a space in which laundry for drying is put in and can perform heat exchange with dehumidified and dried air provided in a hot air supply unit to be described later.

The drying space 3 may be rotatably installed in the cabinet 1 and may be provided so that the air supplied from the hot air supply unit 7 to be described later may flow in and out.

The inlet duct 5 has a configuration in which one side communicates with the drying space 5 and the other side communicates with a hot air supply unit 7 to be described later.

Therefore, the inflow duct 5 is configured such that the humidity-depleted air is discharged from the drying space 3 and then introduced into the hot air supply unit 7 after the heat exchange in the drying space 3 is completed.

The hot air supply unit 7 is configured to dehumidify and heat the air having undergone the heat exchange with the laundry in the drying space 3 through the inlet duct 5.

The hot air supply unit 7 may be composed of a heat pump module, which includes an evaporator 71 and a condenser 73.

The heat pump module is a system capable of heat exchange with air through a refrigerant circulating between the evaporator 71 and the condenser 73.

The evaporator 71 is configured to evaporate the refrigerant circulating through the heat pump module, and can absorb dehumidified air by absorbing heat from the air passing through the evaporator 71.

The condenser 73 is configured to condense the refrigerant circulating through the heat pump module. The condenser 73 supplies heat generated by condensation of the refrigerant to the air passing through the condenser, thereby heating the air.

The evaporator 71 is connected to the inlet duct so as to dehumidify the air introduced from the inlet duct 5 and the condenser 73 is connected to the evaporator 71 to heat the dehumidified air. And is preferably provided between the evaporator 71 and an outflow duct to be described later.

Although the present disclosure discloses a heat pump module as an example of the hot air supply unit 7, it is not intended to limit the heat pump module to the hot air supply unit 7.

Therefore, the hot air supply unit 7 dehumidifies the air discharged from the drying space 3 through the inlet duct 5 by the air or water supplied from the inside / outside of the cabinet 1, The present invention does not exclude the method of supplying air to the drying space 3 through the outlet duct 9 to be described later after heating through a heater such as a hot wire.

One end of the outlet duct 9 communicates with the hot air supply unit 7 and the other side communicates with the drying space 3 to supply dehumidified and heated air through the hot air supply unit 7 to the drying space 3 .

A fan 91 may be provided at a position where the outlet duct 9 and the hot air supply unit 7 are coupled to facilitate the inflow and outflow of air into the hot air supply unit 7.

The drying apparatus 100 including the above-described configuration may further include a separate structure for controlling the operation of the drying apparatus by determining the degree of drying of the laundry.

This is because if the user inputs a command for drying the laundry, the drying apparatus determines the drying degree of the laundry by itself, thereby determining the drying time which may vary depending on the amount of laundry (amount of laundry) So that the drying process can be terminated.

Therefore, the configuration for controlling the operation of the drying apparatus by judging the degree of drying of the laundry by itself is an important constituent in reducing the amount of electric power and drying time for operation of the drying apparatus.

The present invention further includes a humidity sensor (S) for measuring the humidity of the air discharged to the hot air supply unit (7) through the inlet duct (5) after heat exchange with the laundry do.

The humidity measured by the humidity sensor S may be compared with a predetermined reference humidity. If the measured humidity measured through the humidity sensor S is lower than the reference humidity, It can be judged that it is dried to a desired level.

The dehumidified and heated air through the hot air supply unit 7 flows into the drying space 3 through the outflow duct 9 to perform heat exchange with the laundry.

Therefore, the laundry in the drying space 3 is dehumidified and exchanges heat with the heated air to remove moisture contained in the laundry, and then flows into the hot air supply unit 7 through the inlet duct 5 again.

The air in the drying space 3 flowing into the hot air supply unit 7 through the inlet duct 5 may be at a high humidity in the initial stage of the drying process, The humidity of the incoming air will be low.

Therefore, the humidity sensor S measures the humidity of the air flowing into the hot air supply unit 7, and compares the measured humidity with the predetermined humidity to determine the degree of drying of the laundry.

The position of the humidity sensor S may be provided before the evaporator 71 of the hot air supply unit so as to measure the humidity of the air discharged from the drying space 3, .

If a humidity sensor is provided between the evaporator 71 and the condenser 73 or a humidity sensor is provided in the outlet duct 9, the humidity of the dehumidified and heated air is discharged from the drying space 3, This is because data for accurately determining the degree of drying of the laundry is not preferable.

That is, when the humidity sensor S is provided between the evaporator 71 and the condenser 73, the humidity of the air dehumidified by the evaporator 71 is measured. Therefore, as the humidity data for determining the degree of drying of the laundry, It is inappropriate.

When the humidity sensor S is provided between the condenser 73 and the fan 91 or the outlet duct 9, the humidity sensor S is dehumidified by the evaporator 71, heated by the condenser 73, It is not suitable as the humidity data for judging the degree of drying of the laundry.

Therefore, the humidity sensor (S) provided in the drying apparatus of the present invention limits the collecting position of the humidity data necessary for judging the dryness of the laundry before the inlet duct (5) or the evaporator (71).

2 is a conceptual diagram of the control unit of the drying apparatus of the present invention.

Hereinafter, the control unit C for controlling the drying apparatus of the present invention will be described with reference to FIG.

The control unit C receives the measured humidity data measured from the humidity sensor S, the time measuring unit T and the volume measuring unit W, the operating time data of the drying apparatus, and the volume data, The display device P and the alarm means A are controlled by comparing the reference data provided by the data storage means D with each other.

The humidity sensor S measures the humidity of the air discharged from the drying space 3 and provides the measured humidity to the controller C. The time measuring means T measures the operating time data of the drying apparatus 100 To the control unit (C).

Here, the "operating time" of the drying apparatus 100 means a heat exchange time of the hot air supplied from the hot air supply unit and the laundry, and more specifically, the operating time of the hot air supply unit.

The quantity detecting means W is a means for detecting the amount of laundry loaded into the drying space, and can be detected by various methods. For example, a weight sensor may be used after the laundry is charged into the drying space.

When the drying space 3 is provided to be rotatable and includes a motor (not shown) for rotating the drying space 3, it is possible to detect the amount of the laundry based on the size of the load sensed during rotation of the motor It is acceptable.

The data storage means D stores data on the minimum drying time and the maximum drying time which are the minimum driving times of the drying apparatus according to the amount of the laundry and stores the reference humidity which is a reference value for judging that the drying of the laundry is completed .

The minimum drying time is to prevent an error that the laundry is entangled in the drying space and has a drying degree lower than the actual drying degree of the laundry as a result of insufficient heat exchange with the air supplied from the hot air supply unit.

The minimum drying time is a means for preventing the drying device from erroneously determining the degree of drying of the laundry due to the deviation of the humidity data measured by the humidity sensor (S).

That is, the data storage means D may store the minimum drying time data according to the degree of draining and may provide the data to the controller C, so that the controller C may supply the drying time data through the humidity sensor S The drying apparatus can be driven without measuring the humidity.

Therefore, when the drying degree of the laundry is measured by using the humidity sensor at the same time as the drying device is driven, the laundry is dried in the drying space or the drying degree is lower than the drying degree measured by the humidity sensor It is possible to prevent an error that is judged to have occurred.

On the other hand, the maximum drying time is a means for preventing the drying device from continuing to operate when the humidity of the laundry can not be measured or can not be determined due to a failure of the humidity sensor or variation of humidity data during the drying process of the laundry.

That is, when the humidity measured by the humidity sensor is higher than the reference humidity, the controller C stops the operation of the drying apparatus when the maximum operation time has elapsed, thereby preventing power consumption of the drying apparatus.

The minimum drying time and the maximum drying time may be set by various methods. The minimum drying time and the maximum drying time collect data for reaching the reference humidity according to the amount of the laundry, and set the lower and upper limit values of the collected data Can be an example.

In addition, the maximum drying time may be set as described above, but the minimum drying time may be set to a time at which the deviation of the humidity data measured by the humidity sensor is stabilized.

In this case, the minimum drying time should be set by observing the trend of humidity data according to the amount of laundry measured by the humidity sensor (S), and the designer may arbitrarily set the drying time to 70 ~ 80% of the maximum drying time data.

The data storage means D and the time measurement means T are provided separately from the control portion C. The control portion may be configured to store the data storage means D and the time measurement means T, It does not exclude cases where functions can be performed.

3 is a flowchart showing an embodiment of a method for controlling a drying apparatus according to the present invention.

Hereinafter, a control method of the drying apparatus according to an embodiment of the present invention will be described with reference to FIG.

The control method of the drying apparatus according to an embodiment of the present invention includes the steps of detecting the amount of waste (S10), setting the drying time (S11), drying (S12), measuring the humidity (S13) Step S15.

The amount detection step S10 is a step of determining the amount of laundry loaded into the drying space 3 of the drying apparatus 100. [

The control unit C compares the data provided by the volume sensing unit W with the volume data according to the weight provided in the data storage unit D, Is determined.

The drying time setting step S11 is followed by the drying time detection step S10.

In the drying time setting step S11, the controller C sets a minimum drying time corresponding to the laundry amount measured in the laundry amount detection step among the drying time data provided in the data storage part D to the drying apparatus to be.

When the controller C sets the minimum drying time in the drying apparatus 100, the drying step S12 is performed immediately. In this embodiment, the drying step is preferably performed for a set minimum drying time.

This is for the purpose of preventing the misunderstanding of the degree of drying of the laundry by the deviation of the humidity data measured by the humidity sensor (S) or the mistakenness of the degree of drying due to unreliable humidity data because the laundry is twisted.

The drying step S12 is a step of operating the hot air supply unit 7 to dry the laundry introduced into the drying space 3. [

When the drying step S12 is performed, the dehumidified and heated air in the hot air supply unit circulates the drying space 3 through the inlet duct 5 and the outlet duct 9.

The control method of the drying apparatus according to an embodiment of the present invention is a method of controlling the humidity of the air circulating through the drying space 3 from the time when the progress time of the drying step S12 exceeds the minimum drying time, A humidity measuring step S13 for measuring the humidity and a humidity comparing step S15 for comparing the measured humidity and the reference humidity are performed. Here, the term "reference humidity" refers to data indicating the degree of drying of the laundry to be provided to the user in accordance with the driving of the drying apparatus 100. [

The humidity measurement step S13 may be performed during the operation of the hot air supply unit 7 of the drying apparatus 100 or may be performed during the humidity measurement step S13 while the hot air supply unit 7 stops operating .

However, it is preferable that the fan 91 is maintained in the driving state during the humidity measurement step S13 so that the humidity measurement is easily controlled.

Meanwhile, the control method of the present invention may further include a display step (S14) of notifying the user of the humidity data measured through the humidity measurement step and an indication that the humidity measurement step is in progress at the same time as the humidity measurement step (S13) .

This is for the user to recognize that the function of the drying apparatus 100 of the present invention is implemented by the user and to obtain the information on the humidity of the laundry to predict the drying time.

The humidity comparison step S15 compares the measured humidity measured by the humidity sensor S and provided to the control unit C with the reference humidity provided to the control unit in the data storage unit D.

Accordingly, if it is determined in step S15 that the measured humidity is lower than the reference humidity, the controller C determines that the laundry is sufficiently dried and stops the operation of the drying apparatus 100 to terminate the drying step (Step S15).

However, if the measured humidity is higher than the reference humidity, since the laundry is not sufficiently dried yet, the steps after the drying step S12 are controlled to continue.

The humidity comparison step S15 has been described as a separate step. However, since it is a method for explaining the present invention, the designer can be implemented in various forms, and the implementation is performed simultaneously with the humidity measurement step S13 It will be an example.

The control method of the drying apparatus according to an embodiment of the present invention is characterized in that the drying apparatus is operated until the minimum drying time according to the amount of the laundry is discharged, and the humidity is measured when the minimum drying time has elapsed.

Accordingly, it is possible not only to prevent an inaccurate humidity measurement due to the entanglement of the laundry, but also to stop the operation of the drying apparatus immediately when the reference humidity is reached, thereby minimizing the amount of power of the drying apparatus.

4 is a flowchart illustrating a method of controlling a drying apparatus according to another embodiment of the present invention.

Another embodiment of the present invention is a method for measuring the amount of moisture contained in a sample, comprising the steps of: detecting the amount of water (S110); setting a drying time (S120); drying (S130); measuring a drying time (S140); comparing (S150) Step S170, humidity comparison step S180, and end step S200.

The surplus amount sensing step S110 is a step of determining the amount of laundry loaded into the drying space 3 of the drying apparatus.

In the quantity sensing step S110 for detecting the amount of laundry, the controller C compares the data provided by the quantity sensing unit W with the quantity data according to the weight provided in the data storage unit D It is a step of judging the amount of laundry to be discharged.

The drying time determination step S120 is followed by the drying time detection step S110.

The drying time setting step S120 is a step in which the controller C selects data based on the minimum drying time and the maximum drying time data provided in the data storage unit D according to the laundry amount measured in the laundry amount sensing step S110 To the drying apparatus.

Following the drying time setting step (S120), a drying step (S130) for driving the drying apparatus for the maximum drying time longer than the set minimum drying time is performed.

During the drying step S130, the drying time measuring step S140 for measuring the operating time of the drying apparatus is performed in another embodiment of the present invention through the time measuring means T described above.

The drying time measured by the time measuring means is provided to the controller C and the controller proceeds to a comparing step S150 of comparing the maximum drying time set in the drying time setting step S120 with the measured drying time .

If it is determined in the comparison step S150 that the measured drying time does not exceed the maximum drying time, it is preferable that the humidity measurement step S160 is performed.

However, the comparison step S150 may be performed by the time measuring means T at the same time as the drying step S130, but is expressed as a separate step for convenience of explanation.

Since the step of measuring the humidity (S160) has the same role as in the embodiment shown in FIG. 3, a detailed description will be omitted.

Meanwhile, the control method of the present invention may further include a display step (S160) of indicating the humidity measurement step in parallel with the humidity measurement step (S160) and a display step (S170) of informing the user of the humidity data measured through the humidity measurement step .

This is for the user to recognize that the function of the drying apparatus 100 of the present invention is implemented by the user and to obtain the information on the humidity of the laundry to predict the drying time.

After the humidity of the air circulating in the drying space 3 is measured in the humidity measuring step S160 and the humidity measured in the displaying step S170 is displayed, a humidity comparing step S180 ).

The reference humidity is provided from the data storage means D to the controller C and the controller compares the humidity measured by the humidity sensor S with the reference humidity, .

If the measured humidity is higher than the reference humidity in the humidity comparison step S180, the laundry is not dried to a desired level. Therefore, the controller C may sequentially perform the steps after the drying step (S130) .

On the other hand, if the measured humidity is lower than the reference humidity in the humidity comparison step (S180), the laundry is dried to a desired level, so that the controller ends the operation of the drying apparatus through the alarm step (S190) .

However, the humidity comparison step S180 may be performed at the same time as the humidity measurement step S160 because the humidity comparison step S180 is only a step separated for the convenience of explanation of the present invention as in the embodiment of FIG.

The alarm step (S190) is a step for informing the user that the drying is completed when the measured humidity reaches the reference humidity, and is implemented by the control unit (C) and the alarm unit (A).

On the other hand, if it is determined that the drying time measured in the comparing step S150 has passed the maximum drying time, the controller C of the drying apparatus of the present invention performs the alarming step S190 and the ending step S200 .

That is, even if it is determined that the humidity measured in the humidity measuring step S160 is higher than the reference humidity, the control method of the present invention ends the drying step S130 when the drying time exceeds the maximum drying time.

This is to prevent the continuous operation of the drying device by driving the drying device only up to the maximum drying time when the drying of the laundry can not be reliably determined due to a problem such as a failure of the humidity sensor or deviation of the measured humidity data.

Accordingly, not only the amount of power consumption of the drying apparatus can be optimized, but also the effect of ensuring drying of the laundry can be achieved.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, it is to be understood that within the scope of the appended claims, the invention is not limited thereto.

1 is a conceptual diagram of a drying apparatus of the present invention.

2 is a conceptual diagram of the control unit of the drying apparatus of the present invention.

3 is a flowchart showing an embodiment of a method for controlling a drying apparatus according to the present invention.

4 is a flow chart showing another embodiment of the method for controlling the drying device of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

Drying unit: 100 Cabinet: 1 Drying space: 3

Inlet duct: 5 Hot air supply unit: 7 Evaporator: 71

Condenser: 73 Outlet duct: 9 Fans: 91

Control section: C Data storage section: D Humidity sensor: S

Time measuring means: T Detecting means: W

Claims (9)

Detecting the amount of laundry laundered in the drying space; A drying time setting step of setting a drying time of the laundry according to the sensed laundry amount; A drying step of supplying hot air to the drying space; A humidity measuring step of measuring a humidity of air discharged from the drying step after a predetermined drying time has elapsed; Terminating the drying step if the measured humidity is lower than a predetermined reference humidity; Wherein the drying time setting step sets the minimum drying time and the maximum drying time according to the laundry amount sensed in the laundry amount sensing step, Wherein the minimum drying time and the maximum drying time are set to a lower limit value and an upper limit value of the collected data by collecting data that reaches the reference humidity according to the laundry amount. The method according to claim 1, And controlling the drying step to be performed again if the humidity measured in the humidity measuring step is higher than the reference humidity. The method according to claim 1, Wherein the humidity measuring step is performed after the minimum drying time has elapsed. The method of claim 3, Wherein the step of terminating the drying step is performed even if the progressing time of the drying step reaches the maximum drying time, even if the humidity measured in the humidity measuring step is higher than the reference humidity. 5. The method according to any one of claims 1 to 4, And a display step of displaying the humidity measured in the humidity measuring step on the outside of the drying apparatus. delete delete delete delete

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