Drum type washing machine

Abstract

A drum type washing machine includes a tub, a case receiving the tub, a connection tube having a first end connected to the tub to define a passage along which air flows from the tub, the connection tube being provided with an uneven portion having a plurality of peaks and valleys and a plurality of straight sections connecting the peaks to the valleys, the peaks and valleys being asymmetrically formed, and an exhaust duct connected to a second end of the connection tube to exhaust air flowing along the connection tube to an external side.

1 . A drum type washing machine comprising: 
 a tub;    a case receiving the tub;    a connection tube having a first end connected to the tub to define a passage along which air flows from the tub, the connection tube being provided with an uneven portion having a plurality of peaks and valleys and a plurality of straight sections connecting the peaks to the valleys, the peaks and valleys being asymmetrically formed; and    an exhaust duct connected to a second end of the connection tube to exhaust air flowing along the connection tube to an external side.    
   
   
       2 . The drum type washing machine according to  claim 1 , wherein the peaks and valleys are formed along a circumference of the connection tube.  
   
   
       3 . The drum type washing machine according to  claim 1 , wherein first vertical lines extending from the circumferential peaks are spaced by a predetermined distance from respective second vertical lines each dividing a pitch between the adjacent valleys into equal two parts to an upstream side of the airflow.  
   
   
       4 . The drum type washing machine according to  claim 1 , wherein an angle between one of the adjacent straight sections, which is located at an upstream side of airflow, and a horizontal plane is designed to be greater than an angle between the other of the adjacent straight sections, which is located at a downstream side of the airflow, and the horizontal plane.  
   
   
       5 . The drum type washing machine according to  claim 1 , wherein the connection tube is formed of a material having a predetermined flexibility to absorb vibration transmitted from the tub.  
   
   
       6 . The drum type washing machine according to  claim 1 , wherein the connection tube is formed of a synthetic rubber.  
   
   
       7 . The drum type washing machine according to  claim 1 , wherein a ratio between a distance between vertical lines extending from the adjacent valleys and a distance between a vertical line and a vertical line dividing the distance between the adjacent valleys into equal two parts is about 5:1.  
   
   
       8 . The drum type washing machine according to  claim 1 , further comprising a pipe inserted in the connection tube.  
   
   
       9 . The drum type washing machine according to  claim 8 , wherein at least a downstream end of the pipe is fixed on an inner circumference of the connection tube.  
   
   
       10 . The drum type washing machine according to  claim 8 , wherein the pipe is inserted to cover the uneven portion so that the airflow can be smoothly realized.  
   
   
       11 . A drum type washing machine comprising: 
 a tub;    a connection tube having a first end connected to the tub to define a passage along which air flows from the tub, the connection tube being provided with an uneven portion absorbing vibration transmitted from the tub;    a auxiliary pipe inserted in the connection tube; and    an exhaust duct connected to a second end of the connection tube to exhaust air flowing along the connection tube to an external side.    
   
   
       12 . The drum type washing machine according to  claim 11 , wherein at least downstream end of the auxiliary pipe is fixed on the connection tube.  
   
   
       13 . The drum type washing machine according to  claim 11 , further comprising a fixing member fixing at least downstream end of the auxiliary pipe on the connection tube.  
   
   
       14 . The drum type washing machine according to  claim 13 , wherein the fixing member is formed in a strip-shape formed around the connection tube.  
   
   
       15 . The drum type washing machine according to  claim 13 , wherein the fixing member is provided in plurality provided around the connection tube at a predetermined distance from each other.  
   
   
       16 . The drum type washing machine according to  claim 13 , wherein the fixing member is formed of at least one screw.  
   
   
       17 . The drum type washing machine according to  claim 11 , wherein the auxiliary pipe is formed in a cylindrical shape having an even inner circumference.  
   
   
       18 . The drum type washing machine according to  claim 11 , wherein the auxiliary pipe is formed of a material having a predetermined flexibility.  
   
   
       19 . The drum type washing machine according to  claim 11 , wherein the auxiliary pipe is formed of a rubber material to effectively absorb vibration.  
   
   
       20 . The drum type washing machine according to  claim 11 , wherein a flexibility of the auxiliary pipe is greater than that of the connection tube.  
   
   
       21 . The drum type washing machine according to  claim 11 , wherein a length of the auxiliary pipe is equal to or greater than that of the uneven portion.  
   
   
       21 . The drum type washing machine according to  claim 11 , wherein the uneven portion having a plurality of peaks and valleys and a plurality of straight sections connecting the peaks to the valleys, the peaks and valleys being asymmetrically formed with reference to a first vertical line dividing a pitch between the adjacent valleys into equal two parts.  
   
   
       22 . The drum type washing machine according to  claim 11 , wherein an angle between one of the adjacent straight sections, which is located at an upstream side of airflow, and a horizontal plane is designed to be greater than an angle between the other of the adjacent straight sections, which is located at a downstream side of the airflow, and the horizontal plane.