Heating element, atomization device, and electronic cigarette

Abstract

A heating element, including: a main body and a heating part. The main body includes a central passage and an inner wall defining the central passage. The main body includes a first body and a second body connected to each other. The central passage extends through the first body and the second body. The second body has an outer diameter smaller than an outer diameter of the first body. The heating part is disposed on the inner wall defining the central passage and is a mesh structure.

What is claimed is: 
     
         1 . A heating element, comprising:
 a main body, the main body comprising a central passage and an inner wall defining the central passage, the main body comprising a first body and a second body connected to each other, the central passage extending through the first body and the second body, the second body having an outer diameter smaller than an outer diameter of the first body; and   a heating part, the heating part being disposed on the inner wall defining the central passage and being a mesh structure.   
     
     
         2 . The heating element of  claim 1 , wherein the main body comprises an airflow inlet and an airflow outlet both communicating with the central passage; the airflow inlet is disposed at one end of the first main body, and the airflow outlet is disposed at one end of the second main body; the heating part extends circumferentially along the central passage on an inner wall of the first body. 
     
     
         3 . The heating element of  claim 2 , wherein the heating part comprises an electrically conductive metal and is at least partially embedded in the inner wall of the first body; or the heating part comprises an electrically conductive ink printed or coated on the inner wall of the first body. 
     
     
         4 . The heating element of  claim 3 , wherein the heating part comprises a conductive heating unit; the conductive heating unit comprises a plurality of polygonal grids arrayed to form a circuit loop. 
     
     
         5 . The heating element of  claim 4 , wherein the heating part further comprises a first heat conductive portion and/or a second heat conductive portion; the first heat conductive portion is attached to a first side of the conductive heating unit and extends in a direction away from the conductive heating unit; the second heat conductive portion is attached to a second side of the conductive heating unit and extends in a direction away from the conductive heating unit. 
     
     
         6 . The heating element of  claim 4 , wherein the heating part further comprises a first electrical joint and a second electrical joint; the first electrical joint and the second electrical joint are electrically connected to both ends of the conductive heating unit, respectively. 
     
     
         7 . The heating element of  claim 6 , wherein the first electrical joint and the second electrical joint are integrated with the conductive heating unit. 
     
     
         8 . The heating element of  claim 1 , wherein the first body comprises a first axis, the second body comprises a second axis, and the first axis coincides with the second axis; the central passage comprises a third axis; the third axis coincides with the first axis and the second axis. 
     
     
         9 . The heating element of  claim 6 , wherein two pins are respectively connected to edges of the first electrical joint and the second electrical joint close to the conductive heating unit. 
     
     
         10 . The heating element of  claim 1 , wherein the main body comprises porous ceramics. 
     
     
         11 . The heating element of  claim 1 , wherein an arc-shaped transition section is provided at a joint between the first body and the second body. 
     
     
         12 . An atomization device, comprising the heating element of  claim 1 . 
     
     
         13 . The atomization device of  claim 12 , further comprising a storage tank, a seal base, and an atomization tube; wherein the storage tank comprises a storage chamber; a first end of the storage tank comprises a mouthpiece, and the seal base is disposed on a second end of the storage tank; the mouthpiece comprises an inhaling opening; the main body comprises an airflow inlet and an airflow outlet both communicating with the central passage; the airflow inlet is disposed at one end of the first main body, and the airflow outlet is disposed at one end of the second main body; the airflow outlet faces the inhaling opening and communicates with the inhaling opening; the heating element is disposed in the atomization tube; the atomization tube comprises a liquid inlet facing the first body; and two ends of the atomization tube are respectively connected to the mouthpiece and the seal base. 
     
     
         14 . An electronic cigarette, comprising the atomization device of  claim 12  and a battery module for supplying power to the heating element of the atomization device.