Dryer

Abstract

A dryer comprises a drying drum, a drum motor driving the drying drum to rotate, and a drying fan for making dried hot air enter into the drying drum. The drying fan comprises a volute, a fan disposed in the volute, and a drying motor driving the fan to rotate. The drum motor and the drying motor share one motor, and the motor is capable of forward and reverse rotation, and drives the drying drum and the fan to rotate forward and reversely. The amount of air flow passed by the fan is same in both cases of forward and reverse rotation. The forward and reverse rotation of the drying drum can more effectively shake the clothes in the drying drum, so that the drying efficiency is higher and the drying is more uniform.

1 . A dryer, comprising a drying drum,
 a drum motor driving the drying drum to rotate, and   a drying fan for making dried hot air enter into the drying drum;   wherein, the drying fan comprises a volute, a fan disposed in the volute, and a drying motor driving the fan to rotate; the drum motor and the drying motor share one motor,   wherein the motor is capable of forward and reverse rotation, and drives the drying drum and the fan to rotate forward and reversely;   the amount of air flow passed by the fan is same in both cases of forward and reverse rotation.   
     
     
         2 . The dryer according to  claim 1 , wherein
 the volute of the drying fan comprises two parts which are a first case and a second case, and is formed by connecting the two parts in snap-fit pattern in an axial direction of the fan;   an air inlet is arranged at the first case in the axial direction of the fan, and an air outlet is arranged at the volute in a radial direction of the fan.   
     
     
         3 . The dryer according to  claim 1 , wherein the second case of the volute of the drying fan comprises a bottom plate, and a side plate mounted on one side of the bottom plate;
 the side plate encloses a circular-like contour which is formed by connecting a plurality of involute contours ;   an opening is configured on the circular-like contour,   each of two sides of the opening is outward provided with a straight plate;   two straight plates are respectively tangent to the circular-like contour on both sides of the opening to form an U-shaped contour;   an area between the two straight plates communicates with the opening to form an air outlet of the volute; and   the fan is arranged in the circular-like contour.   
     
     
         4 . The dryer according to  claim 1 , wherein
 the second case of the volute of the drying fan comprises a bottom plate and a side plate mounted on one side of the bottom plate;   the side plate encloses a circular contour,   an opening is configured on the circular contour;   each of two sides of the opening is outward provided with a straight plate;   two straight plates are respectively tangent to the circular contour on both sides of the opening to form an U-shaped contour;   an area between the two straight plates communicates with the opening to form an air outlet of the volute; and   the fan is arranged in the circular contour, and located at a center of the circular contour.   
     
     
         5 . The dryer according to  claim 3 ,
 wherein the first case of the volute of the drying fan has an U-shaped contour that matches with the second volute.   
     
     
         6 . The dryer according to  claim 1 , wherein the dryer has a condensation function,
 the dryer comprises a condenser and a condensate fan; the condensate fan makes cooling air enter into the condenser;   the condensate fan comprises a volute, a fan arranged in the volute, and a condensate motor driving the fan to rotate;   the condensate motor, the drum motor and the drying motor share one motor;   the condensate fan forward and reversely rotates depending on forward and reverse rotation of the drying motor, and   the amount of air flow passed by the condensate fan is same in both cases of forward and reverse rotation.   
     
     
         7 . The dryer according to  claim 6 , wherein
 the volute of the condensate fan comprises two parts which are a first case and a second case, and is formed by connecting the two parts in snap-fit pattern in an axial direction of the fan;   an air inlet is arranged at the first case in the axial direction of the fan, and an air outlet is arranged at the volute in a radial direction of the fan.   
     
     
         8 . The dryer according to  claim 7 , wherein
 the second case of the volute of the condensate fan comprises a bottom plate, and a side plate mounted on one side of the bottom plate;   the side plate encloses a circular-like contour which is formed by connecting a plurality of involute contours;   an opening is configured on the circular-like contour,   each of two sides of the opening is outward provided with a straight plate;   two straight plates are respectively tangent to the circular-like contour on both sides of the opening to form an U-shaped contour;   an area between the two straight plates communicates with the opening to form an air outlet of the volute; the fan is arranged in the circular-like contour.   
     
     
         9 . The dryer according to  claim 7 , wherein the second case of the volute of the condensate fan comprises a bottom plate and a side plate mounted on one side of the bottom plate;
 the side plate encloses a circular contour,   an opening is configured on the circular contour;   two straight plates are set outwards from the opening; the two straight plates are respectively tangent to the circular contour on both sides of the opening to form an U-shaped contour;   an area between the two straight plates forms an air outlet of the volute; and   the fan is arranged in the circular contour, and located at a center of the circular contour.   
     
     
         10 . The dryer according to  claim 8 ,
 wherein the first case of the volute of the condensate fan has an U-shaped contour that matches with the second volute.   
     
     
         11 . The dryer according to  claim 4 , wherein the first case of the volute of the drying fan has an U-shaped contour that matches with the second volute. 
     
     
         12 . The dryer according to  claim 2 , wherein the dryer has a condensation function,
 the dryer comprises a condenser and a condensate fan; the condensate fan makes cooling air enter into the condenser;   the condensate fan comprises a volute, a fan arranged in the volute, and a condensate motor driving the fan to rotate;   the condensate motor, the drum motor and the drying motor share one motor;   the condensate fan forward and reversely rotates depending on forward and reverse rotation of the drying motor, and   the amount of air flow passed by the condensate fan is same in both cases of forward and reverse rotation.   
     
     
         13 . The dryer according to  claim 3 , wherein the dryer has a condensation function,
 the dryer comprises a condenser and a condensate fan; the condensate fan makes cooling air enter into the condenser;   the condensate fan comprises a volute, a fan arranged in the volute, and a condensate motor driving the fan to rotate;   the condensate motor, the drum motor and the drying motor share one motor;   the condensate fan forward and reversely rotates depending on forward and reverse rotation of the drying motor, and   the amount of air flow passed by the condensate fan is same in both cases of forward and reverse rotation.   
     
     
         14 . The dryer according to  claim 4 , wherein the dryer has a condensation function,
 the dryer comprises a condenser and a condensate fan; the condensate fan makes cooling air enter into the condenser;   the condensate fan comprises a volute, a fan arranged in the volute, and a condensate motor driving the fan to rotate;   the condensate motor, the drum motor and the drying motor share one motor;   the condensate fan forward and reversely rotates depending on forward and reverse rotation of the drying motor, and   the amount of air flow passed by the condensate fan is same in both cases of forward and reverse rotation.   
     
     
         15 . The dryer according to  claim 5 , wherein the dryer has a condensation function,
 the dryer comprises a condenser and a condensate fan; the condensate fan makes cooling air enter into the condenser;   the condensate fan comprises a volute, a fan arranged in the volute, and a condensate motor driving the fan to rotate;   the condensate motor, the drum motor and the drying motor share one motor;   the condensate fan forward and reversely rotates depending on forward and reverse rotation of the drying motor, and   the amount of air flow passed by the condensate fan is same in both cases of forward and reverse rotation.   
     
     
         16 . The dryer according to  claim 9 , wherein the first case of the volute of the condensate fan has an U-shaped contour that matches with the second volute. 
     
     
         17 . The dryer according to  claim 1 , wherein a blade of the fan of the drying fan and/or the condensate fan is straight blade extending in the radial direction of the fan, and a surface of the blade is parallel to the central axis, that is the rotation axis of the fan. 
     
     
         18 . The dryer according to  claim 4 , wherein a gap between the volute and the fan gradually increases toward the air outlet from the bottom of the U-shaped contour to form a better air pressure to increase the circulation air flow.