Dryer and controlling method thereof

Abstract

A including a sensor, a memory configured to store at least one instruction, and a processor configured to obtain, by being connected with the memory and executing at least one instruction, an internal humidity of the dryer through the sensor, identify an external humidity of the dryer based on the obtained internal humidity, obtain, based on a change in the internal humidity and the external humidity, information on an amount of emitted moisture of a drying object inserted in the dryer, and identify whether drying is complete by comparing information on the amount of emitted moisture with a threshold value.

What is claimed is: 
     
         1 . A dryer, comprising:
 at least one sensor to sense an internal humidity of the dryer;   a memory configured to store at least one instruction; and   a processor connected with the memory and configured to control the dryer,   wherein the processor is configured to:
 obtain, based on executing the at least one instruction, the internal humidity of the dryer through the at least one sensor; 
 identify an external humidity of the dryer based on the obtained internal humidity; 
 obtain, based on a change in the internal humidity and a change in the external humidity, information on an amount of moisture of an object placed in the dryer to be dried; and 
 identify whether a drying operation is complete by comparing the information on the amount of moisture of the object with a threshold value. 
   
     
     
         2 . The dryer of  claim 1 , wherein the processor is configured to identify a change rate in the internal humidity, and identify the external humidity based on the identified change rate. 
     
     
         3 . The dryer of  claim 2 , wherein the processor is configured to:
 identify whether the internal humidity passed a maximum humidity point;   identify whether the change rate in the internal humidity passed a minimum change rate point;   identify, based on identifying that the internal humidity passed the maximum humidity point and the change rate in the internal humidity passed the minimum change rate point, the change rate in the internal humidity;   identify, based on the identified change rate in the internal humidity, a predicted point at which the change rate in the internal humidity becomes 0;   identify a predicted internal humidity at a point at which the predicted change rate in the internal humidity becomes 0; and   identify the predicted internal humidity as the external humidity.   
     
     
         4 . The dryer of  claim 1 , wherein the processor is configured to:
 identify a value of the internal humidity compared to the external humidity as the amount of moisture of the object;   identify a ratio value of the identified amount of moisture of the object with respect to a maximum value of the amount of moisture of the object; and   identify the drying operation as complete based on the ratio value being less than or equal to the threshold value.   
     
     
         5 . The dryer of  claim 1 , wherein the threshold value is set differently according to a characteristic of the object. 
     
     
         6 . The dryer of  claim 5 , wherein the characteristic of the object comprises at least one from among a maximum value of the amount of moisture of the object and a time spent on drying. 
     
     
         7 . The dryer of  claim 1 , wherein the processor is configured to:
 identify a change pattern in the internal humidity;   predict a drying complete time point based on the identified change pattern; and   provide the predicted drying complete time point.   
     
     
         8 . A controlling method of a dryer, the method comprising:
 obtaining an internal humidity of the dryer from at least one sensor;   identifying an external humidity of the dryer based on the obtained internal humidity;   obtaining, based on a change in the internal humidity and a change in the external humidity, information on an amount of moisture of an object placed in the dryer to be dried; and   identifying whether a drying operation is complete by comparing the information on the amount of moisture of the object with a threshold value.   
     
     
         9 . The method of  claim 8 , wherein the identifying the external humidity comprises identifying a change rate in the internal humidity, and identifying the external humidity based on the identified change rate. 
     
     
         10 . The method of  claim 9 , wherein the identifying the external humidity comprises:
 identifying whether the internal humidity passed a maximum humidity point;   identifying whether a change rate in the internal humidity passed a minimum change rate point;   identifying, based on identifying that the internal humidity passed the maximum humidity point and the change rate in the internal humidity passed the minimum change rate point, the change rate in the internal humidity;   identifying, based on the identified change rate in the internal humidity, a predicted point at which the change rate in the internal humidity becomes 0;   identifying a predicted internal humidity at a point at which a change rate in the predicted internal humidity becomes 0; and   identifying the predicted internal humidity as the external humidity.   
     
     
         11 . The method of  claim 8 , wherein the obtaining the information on the amount of moisture of the object comprises:
 identifying a value of the internal humidity compared to the external humidity as the amount of moisture of the object; and   identifying a ratio value of the identified amount of moisture of the object with respect to a maximum value of the amount of moisture of the object, and   wherein the identifying whether drying is complete comprises identifying drying as complete based on the ratio value being less than or equal to the threshold value.   
     
     
         12 . The method of  claim 8 , wherein the threshold value is set differently according to a characteristic of the object. 
     
     
         13 . The method of  claim 12 , wherein the characteristic of the object comprises at least one from among a maximum value of an amount of moisture of the object and a time spent on drying. 
     
     
         14 . The method of  claim 8 , wherein the controlling method further comprises:
 identifying a change pattern in the internal humidity;   predicting a drying complete time point based on the identified change pattern; and   providing the predicted drying complete time point.   
     
     
         15 . A non-transitory computer readable recording medium comprising a program for executing a controlling method of a dryer, the controlling method comprising:
 obtaining an internal humidity of the dryer from at least one sensor;   identifying an external humidity of the dryer based on the obtained internal humidity;   obtaining, based on a change in the internal humidity and a change in the external humidity, information on an amount of moisture of an object placed in the dryer to be dried; and   identifying whether a drying operation is complete by comparing the information on the amount of moisture emitted from the object with a threshold value.