Clothes Dryer and Control Method Therefor

Abstract

A clothes dryer includes a clothes drying drum, where a humidity sensor for detecting a humidity value of clothes is arranged at a clothes throwing port of the clothes drying drum; a detection apparatus is further arranged in the clothes drying drum; and the detection apparatus is arranged inside the clothes throwing port. The detection apparatus is connected with a controller. The detection apparatus is configured to detect an impedance value of a surrounding environment of the detection apparatus at every interval of a preset time period and transmit the impedance value to the controller. The controller respectively compares each impedance value with a preset impedance threshold, and judges the amount of clothes in the clothes drying drum according to the number of the impedance values exceeding the preset impedance threshold, thereby adjusting a rotating speed of the clothes drying drum according to the amount of clothes.

1 . A clothes dryer, comprising a clothes drying drum, wherein a humidity sensor for detecting a humidity value of clothes is arranged at a clothes throwing port of the clothes drying drum; a detection apparatus is further arranged in the clothes drying drum; and the detection apparatus is arranged inside the clothes drying drum;
 the detection apparatus is connected with a controller; and the detection apparatus is configured to detect an impedance value of a surrounding environment of the detection apparatus; and   the controller is configured to acquire the impedance value at every interval of a preset time period within a predetermined duration, and controls a rotating speed of the clothes drying drum according to the impedance value.   
     
     
         2 . The clothes dryer according to  claim 1 , wherein the detection apparatus is arranged at an edge of the clothes throwing port of the clothes drying drum. 
     
     
         3 . The clothes dryer according to  claim 1 , wherein the detection apparatus is arranged above a horizontal symmetry axis of a plane on which the clothes throwing port is located. 
     
     
         4 . The clothes dryer according to  claim 2 , wherein the detection apparatus is arranged within a range of deflecting 60° to left or right from a vertical symmetry axis of the plane on which the clothes throwing port is located. 
     
     
         5 . The clothes dryer according to  claim 1 ,
 wherein the detection apparatus is a pair of metal electrodes.   
     
     
         6 . A control method of a clothes dryer, comprising: detecting, by a detection apparatus after a clothes drying drum is operated at an initial rotating speed, an impedance value of a surrounding environment of the detection apparatus; and acquiring, by a controller, the impedance value at every interval of a preset time period within a predetermined duration; and
 comparing, by the controller, each impedance value with an impedance threshold respectively, and judging the amount of clothes in the clothes drying drum according to the number of the impedance values exceeding the impedance threshold; and adjusting a rotating speed of the clothes drying drum according to the amount of clothes in the clothes drying drum.   
     
     
         7 . The control method of the clothes dryer according to  claim 6 , further comprising: classifying, by the controller, the amount of clothes in the clothes drying drum into at least three levels; wherein each level corresponds to a rotating speed. 
     
     
         8 . The control method of the clothes dryer according to  claim 7 , further comprising: classifying, by the controller, the amount of clothes in the clothes drying drum into small capacity, medium capacity and large capacity;
 adjusting the rotating speed of the clothes drying drum to a low rotating speed when the controller determines that the amount of clothes in the clothes drying drum is the small capacity;   adjusting the rotating speed of the clothes drying drum to a medium rotating speed when the controller determines that the amount of clothes in the clothes drying drum is the medium capacity; and   adjusting the rotating speed of the clothes drying drum to a high rotating speed when the controller determines that the amount of clothes in the clothes drying drum is the large capacity.   
     
     
         9 . The control method of the clothes dryer according to  claim 8 , wherein the low rotating speed is 40-45 rpm;
 the medium rotating speed is 50-55 rpm; and   the high rotating speed is 60-65 rpm.   
     
     
         10 . The control method of the clothes dryer according to  claim 6 , wherein the initial rotating speed is 40 rpm. 
     
     
         11 . The control method of the clothes dryer according to  claim 6 , wherein the preset time period is 0.4 s to 0.6 s. 
     
     
         12 . The clothes dryer according to  claim 2 , wherein the detection apparatus is a pair of metal electrodes. 
     
     
         13 . The clothes dryer according to  claim 3 , wherein the detection apparatus is a pair of metal electrodes. 
     
     
         14 . The clothes dryer according to  claim 4 , wherein the detection apparatus is a pair of metal electrodes. 
     
     
         15 . The control method of the clothes dryer according to  claim 7 , wherein the preset time period is 0.4 s to 0.6 s. 
     
     
         16 . The control method of the clothes dryer according to  claim 8 , wherein the preset time period is 0.4 s to 0.6 s. 
     
     
         17 . The control method of the clothes dryer according to  claim 9 , wherein the preset time period is 0.4 s to 0.6 s. 
     
     
         18 . The control method of the clothes dryer according to  claim 10 , wherein the preset time period is 0.4 s to 0.6 s.