Adjustable vortex flame device

An adjustable vortex flame device comprising:

• a control head delimiting a through hole with an opening and including a flow guiding mechanism, with the flow guiding mechanism including a plurality of vanes, with the plurality of vanes disposed around a circumference of the opening one after another, with two adjacent vanes including a spiral air passage formed therebetween, with the flow guiding mechanism including a flow control head, with the flow control head inserting in the through hole, with the flow control head including a first member and a second member detachably engaging with the first member and delimiting a first chamber and a second chamber connecting to the first chamber, with two channels extending in the first member and to an outer periphery of the flow control head and connecting to the first chamber, with the flow control head having two flow outlets defined at distal ends of the two channels and a flow inlet defined at a distal end of the second chamber, with the adjustable vortex flame device in use including a fuel reservoir fluidly connecting to the flow inlet of the flow control head, with the first chamber extending longitudinally along a first axis, with the two channels disposed symmetrically with respect to the first axis, with each of the two channels extending longitudinally along a second axis, and with the second axis offsetting radially from the first axis;
• and
• a hollow and transparent shield disposed above the control head and delimiting a space fluidly connecting to the through hole, wherein the control head includes a base having an inner periphery thereof delimiting the opening, wherein the flow guiding and control mechanisms are mounted on the base, wherein the base includes a first base member and a second base member joined to the first base member, wherein the first base member has a first engaging end and the second base member has a second engaging end engaging with the first engaging end, wherein the first engaging end forms a plurality of first ridges each including first and second edges and an apex defined therebetween and the second engaging end forms a plurality of second ridges each including third and fourth edges and an apex defined therebetween respectively, wherein the first and second edges of one of the plurality of first ridges correspondingly face the third and fourth edges of one of the plurality of second ridges, wherein the first and second edges of one of the plurality of first ridges have an included angle of greater than 90 degrees, and wherein the third and fourth edges of one of the plurality of second ridges have an included angle of greater than 90 degrees.