Heating element & drying apparatus

Abstract

The present disclosure discloses a heating element ( 10 ) and a drying apparatus ( 100 ). The heating element ( 10 ) comprises a core column assembly ( 11 ), wherein an outer wall of the core column assembly ( 11 ) is configured with a recess ( 114 ); a plurality of supporting elements ( 12 ), each supporting elements ( 12 ) is configured on the core column assembly ( 11 ) and extends radially along an airflow channel; a heater ( 13 ), wherein the heater ( 13 ) surrounds outer edges of the plurality of supporting elements; a fuse ( 15 ), wherein the fuse ( 15 ) is located in the recess ( 114 ) and is configured to disconnect the heater ( 13 ) when a temperature exceeds a threshold.

What is claimed is: 
     
         1 . A heating element, configured in an airflow channel of a drying apparatus, the heating element comprising:
 a core column assembly, wherein an outer wall of the core column assembly is configured with a recess;   a plurality of supporting elements, each supporting element being configured on the core column assembly and extending radially along the airflow channel;   a heater, wherein the heater surrounds outer edges of the plurality of supporting elements;   a fuse, wherein the fuse is located in a recess and configured to disconnect the heater when a temperature is higher than a threshold.   
     
     
         2 . The heating element of  claim 1 , wherein the core column assembly comprises:
 a first insulation sleeve, wherein an outer wall of the first insulation sleeve comprises a part of the outer wall of the core column assembly, the first insulation sleeve defines a notch corresponding to the recess, the first insulation sleeve is formed of a material with heat resistance and/or low thermal conductivity;   two end caps, wherein the two end caps are respectively configured at two ends of the first insulation sleeve, the end caps are formed of an insulating material;   and wherein each supporting element is coupled to the end caps.   
     
     
         3 . The heating element of  claim 2 , wherein at least one supporting element comprises a mounting portion located within the recess, and the fuse is configured on the mounting portion. 
     
     
         4 . The heating element of  claim 2 , wherein the end cap defines with a plurality of slots for insertion and mounting of the supporting elements, and at least one slot extends through to the recess and forms a wire passage hole for wires of the fuse to pass through. 
     
     
         5 . The heating element of  claim 2 , wherein the core column assembly further comprises a base defining the recess, wherein the base extends axially and both ends of the base are respectively coupled to corresponding end caps,
 the first insulation sleeve is mounted outside the base.   
     
     
         6 . The heating element of  claim 5 , wherein the first insulation sleeve is formed of mica material, the base is formed of metal material, and each end cap is formed of plastic. 
     
     
         7 . The heating element of  claim 5 , wherein the base has an axially extending mounting hole, and each end cap is coupled to the base through the mounting hole. 
     
     
         8 . The heating element of  claim 1 , wherein a surface color of the fuse is configured to have a high absorption rate for thermal radiation. 
     
     
         9 . The heating element of  claim 2 , wherein a surface color of the end cap is configured to have a low absorption rate for thermal radiation. 
     
     
         10 . The heating element of  claim 1 , wherein it further comprises a plurality of wiring, wherein the wiring is configured to be connected to an external circuit, wherein at least one wiring passes through the core column assembly. 
     
     
         11 . The heating element of  claim 1 , wherein the quantity of the supporting elements is six, and the supporting elements are uniformly arranged along a circumferential direction of the core column assembly. 
     
     
         12 . A drying apparatus, the drying apparatus comprising:
 an airflow generating element, wherein the airflow generating element comprises a motor for generating airflow;   an airflow channel, wherein the airflow channel is configured downstream of the airflow generating element;   the heating element of  claim 1 .   
     
     
         13 . The drying apparatus of  claim 12 , wherein the axes of the airflow channel, the airflow generating element, and the core column assembly are coaxial. 
     
     
         14 . The drying apparatus of  claim 12 , wherein the motor is operable to output an annular airflow; and,
 the outer diameter of the core column assembly is less than or equal to the inner diameter of the annular airflow;   the inner diameter of the airflow channel is greater than or equal to the outer diameter of the annular airflow.   
     
     
         15 . The drying apparatus of  claim 12 , wherein the motor comprises a housing and a rotor assembly, the housing comprises an inner wall and an outer wall, an annular cavity is defined between the inner wall and the outer wall; the rotor assembly comprises a rotating shaft rotatably mounted on the inner wall and a propeller mounted on the rotating shaft, the propeller generates an annular airflow in the annular cavity when rotating; and,
 the outer diameter of the core column assembly is less than or equal to the outer diameter of the inner wall;   the inner diameter of the airflow channel is greater than or equal to the inner diameter of the outer wall.   
     
     
         16 . The drying apparatus of  claim 15 , wherein the motor comprises a connecting board for providing control signals and/or power input, the connecting board is coupled at one end to the rotor assembly, and extends radially across the annular cavity and extends to the outside of the housing; and,
 in any plane perpendicular to the airflow direction, a projection of at least one supporting element overlaps at least partially with a projection of the connecting board.   
     
     
         17 . The drying apparatus of  claim 12 , wherein the airflow generating element further comprises a mounting base, wherein the motor is configured inside the mounting base;
 the airflow channel and/or the heating element are positioned at one end of the mounting base and are tightly adjacent to the downstream end of the motor.   
     
     
         18 . The drying apparatus of  claim 17 , wherein the drying apparatus further comprises a seal axially extending and retracting along the airflow generating element, the seal seals between the mounting base and the airflow channel. 
     
     
         19 . The drying apparatus of  claim 12 , wherein an air outlet is configured downstream of the airflow channel, and an air guide grille is configured at the air outlet, the air guide grille is configured on the core column assembly. 
     
     
         20 . The drying apparatus of  claim 12 , wherein the drying apparatus further comprises an annular radiation element configured to output infrared radiation, the airflow channel is configured inside the annular inner edge of the radiation element, and the airflow channel comprises a second insulation sleeve formed of a material with heat resistance and/or low thermal conductivity, the heating element is configured in the second insulation sleeve and kept coaxial with the second insulation sleeve.