Cartridge with venturi flow path

Abstract

A method for increasing a flow rate of a vaporizable liquid in a cartridge including varying the diameter of the airflow path of the cartridge to form a least a first pressure and a second pressure. The airflow path may include a first section having a first diameter, a second section having a second diameter, and a third section having a third diameter. The cartridge may further include a heating element coupled to an interior surface of the body portion and located at the second section.

1 . A method for increasing a flow rate of a vaporizable liquid in a cartridge, comprising:
 drawing air into an airflow path of the cartridge to form a first pressure and a second pressure within the airflow path; and   increasing the flow rate in response to forming the first pressure and the second pressure.   
     
     
         2 . The method of  claim 1 , wherein the airflow path comprises:
 a first section having a first diameter;   a second section having a second diameter; and   a third section having a third diameter.   
     
     
         3 . The method of  claim 2 , wherein:
 the first diameter is greater than the second diameter;   the second diameter is less than the third diameter; and   the third diameter is substantially equal to the first diameter.   
     
     
         4 . The method of  claim 3 , wherein the second diameter is equal to about one-half the first diameter. 
     
     
         5 . The method of  claim 3 , wherein the second diameter is equal to about one-third the first diameter. 
     
     
         6 . The method of  claim 3 , wherein:
 the air flows through the first section to form the first pressure at the first section;   the air flows through the second section to form the second pressure at the third section; and   the first pressure is greater than the second pressure.   
     
     
         7 . The method of  claim 6 , wherein the vaporizable liquid flows from a reservoir disposed within the cartridge to a heating element disposed within the airflow path at a flow rate. 
     
     
         8 . The method of  claim 7 , wherein the flow rate is proportional to the difference between the first pressure and the second pressure.