Patent Application
20150167964
1. Field of the Invention
The present invention relates to a vortex flame device and, particularly to an adjustable vortex flame device.
2. Description of the Related Art
U.S. Pat. No. 7,097,448 discloses a vortex type gas lamp for producing an upwardly directed vortex flame inside a surrounding and confined boundary of rotating body of air. An interface is located between the body of air which is devoid of gas and a central region of gas which is bounded by the interface during the operation of the gas lamp. All of the combustion of gas substantially occurs inside the interface. The gas lamp has a central axis and includes a base supplying combustible gas without air at and nearly adjacent to the central axis. The gas lamp further includes a shield including first and second axially extending sections structurally attached to the base in a fluid sealing relationship. The first and second sections are substantially identical and transparent to light and each includes an impermeable wall having an arcuate inner surface and an arcuate outer surface. Furthermore, each of the first and second sections has first and second edges extended axially. The gas lamp yet further includes the first and second walls alternately overlapping one another. The first and second walls are adjacent to their edges and are spaced from one another so as to form tangentially directed ports, thereby forming an axially extending mixing chamber open at its side only through the ports. Furthermore, the first and second sections are arranged that at the base they surround the entry of combustible gas and which receives air for combustion only through the ports, whereby the combustion of the gas results in a flame spaced from the inner surfaces, and the peripheral body of air is devoid of gas entering through the ports. Generally, if no air is supplied for combustion, a flame will extinguish. Unfortunately, it is not easy to prevent excess air from entering the chamber through the ports and creates a stable swirling flame during combustion since the ports are directly open to air. If the device is placed under an environment with wind, height and swirling pattern of the flame are greatly disturbed by excess airflow through the ports due to wind. Notwithstanding, the base of the chamber is also heated during combustion and if there is no enough airflow through the base to provide cooling, the top surface of the base can be very hot and not safe to touch.
U.S. Design patent No. 621,873 discloses a fire tornado lamp including a base and a shield. The base includes a plurality of ports disposed circumferentially. The shield is transparent to light and hollow and includes a passage extended therein. The base and the shield are connected to each other. Each port extends radially with respect to and is in communication with the passage defined in the shield. Each port is so configured that it induces air into the passage in a direction substantially tangential to a circumference of the passage. Likewise, it is not easy to preclude excess air from entering through the ports and the flame is susceptible to wind. Also, the guided air flow that provides for combustion and cooling can only enters the chamber through the ports above the bottom of burning flame at an angle perpendicular to the flame direction. This configuration can generate a swift swirling flame and induce strong convection during combustion, but it is difficult to control the swirling speed and pattern of the flame and the base of the device can be very hot.
A user can't interact with the two set forth devices to adjust the size of a vortex flame thereof.
The present invention is, therefore, intended to obviate or at least alleviate the problems encountered in the prior art.
According to the present invention, an adjustable vortex flame device includes a control head. The control head delimits an opening and includes a flow guiding mechanism including a plurality of vanes and a control mechanism delimiting a hole. The plurality of vanes are disposed along a circumference of the opening one after another, with two adjacent vanes including a spiral air passage formed therebetween. The hole has a diametrical size and which varies with respect to different sizes of vortex flames of the adjustable vortex flame device. The hole corresponds to and in communication with the opening. The hole is in a smaller diametrical size than the opening. A hollow and transparent shield is disposed above the control head and adjacent to the control mechanism. The shield delimits a space in communication with the hole of the control mechanism.
It is therefore an object of the present invention to provide a vortex flame device that a user can interact to adjust the size of a vortex flame thereof.
Other objects, advantages, and new features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanied drawings.
The base includes a first base member 11 and a second base member 12 joined to the first base member 11. The opening 13 defines a first orifice 111 extending through the first base member 11 and a second orifice 121 extending through the second base member 12, respectively. The first base member 11 has a first engaging end 112 and the second base member 12 has a second engaging end 122 engaging with the first engaging end 112. The first engaging end 112 forms a plurality of first ridges each include first and second edges 1121 and 1122 and an apex defined therebetween and the second engaging end 122 forms a plurality of second ridges each include third and fourth edges 1221 and 1222 and an apex defined therebetween respectively, and the first and second edges 1121 and 1122 of one of the plurality of first ridges correspondingly face the third and fourth edges 1221 and 1222 of one of the plurality of second ridges. The first and second edges 1121 and 1122 of one of the plurality of first ridges have an included angle of greater than 90 degrees. The third and fourth edges 1121 and 1122 of one of the plurality of second ridges have an included angle of greater than 90 degrees.
The flow guiding mechanism 20 is disposed below the opening 13. The plurality of vanes 21 are disposed along a circumference of the opening 13 one after another, with two adjacent vanes 21 including a spiral air passage 22 formed therebetween. Each of the plurality of vanes 21 has a first extension 211 secured between the first edge 1121 of one of the plurality of first ridges and the third edge 1221 of one of the plurality of second ridges and a second extension 212 extending from the first extension 211, and the air passage 22 between two adjacent vanes 21 are delimited by the second extensions 212 thereof. Each of the plurality of vanes 21 includes the second extension 212 extending from the first extension 211 obliquely. The first and second extensions 211 and 212 have an included angle of greater than 90 degrees. The plurality of vanes 21 are held securely between the first and second base members 11 and 12 with a plurality of joints 1223 which insert through the first extensions 211 of the plurality of vanes 21 and fixed to the plurality of securing sections 1123. The plurality of securing sections 1123 are formed on the first base member 11 and the plurality of joints 1223 extend from the second base member 12, respectively. The plurality of securing sections 1123 define a plurality of apertures and the plurality of joints 1223 define a plurality of projections, respectively, but not limiting. The plurality of vanes 21 include a plurality of cavities 2111 the plurality of joints 1223 insert through. Therefore, the plurality of joints 1223 insert through the plurality of vanes 21.
The control mechanism 30 is an annular member secured to the first base member 11, and the hole 31 is delimited by an inner periphery of the annular member. The first base member 11 has at least one first fixing end 113 connecting with the opening 13, and the control mechanism 30 has at least one second fixing end 32 engaging with the at least one first fixing end 113.
The hole 31 has a diametrical size and which varies with respect to different sizes of vortex flames of the adjustable vortex flame device. The hole 31 corresponds to and in communication with the opening 13. The hole 31 is in a smaller diametrical size than the opening 13.
A hollow and transparent shield 40 is disposed above the control head 10 and adjacent to the control mechanism 30. The shield 40 delimits a space 41 in communication with the hole 31 of the control mechanism 30. The shield 40 has two opposite open ends 42. The space 41 is between the two open ends 42.
A seat 50 with at least one auxiliary air inlet 51 is fixed to and bears the base and with which a fuel reservoir 60 is adapted to connect. The base includes at least one connecting section 123 with which the seat 50 is engaged to mount securely on the seat 50. The seat 50 includes the fuel reservoir 60 engaged therewith, and the fuel reservoir 60 includes a wick 61 and fuel 62, with the wick 61 drawing fuel 62 up into a vortex flame.
A fixing seat 70 is with a first bore 71 in which the fuel reservoir 60 is engaged to mount securely on the fixing seat 70 and a plurality of feet 72 for standing on a surface stably.
A frame 80 defines a housing 81 with a second bore 82 in which the control head 10, the flow guiding and control mechanisms 20 and 30, the seat 50, the fuel reservoir 60, and the fixing seat 70 are received, a securing ring structure 83 securing the shield 40, and at least one supporting structure 84 bearing the securing ring structure 83 to a height. The securing ring structure 83 includes a plurality of hooks 831 engaged with the shield 40, and the hooks 831 are spaced apart one another circumferentially along the inner periphery of the securing ring structure 83.
A pedestal 90 engages with and bears the frame 80. The pedestal 90 includes a plurality of feet 91 that facilitate standing of the pedestal 90 on a surface stably.
The actuating member 33b includes an annular structure 331b, a plurality of first joining ends 332b disposed between inner and outer peripheries of and distributed circumferentially on the annular structure 331b, and a through hole 333b delimited by the inner periphery of the annular structure 331b and corresponding to and in communication with the opening 13. The plurality of first joining ends 332b are distanced from one anther along a circumferential direction on the annular structure 331b equally.
The plurality of plates 34b collaboratively delimit the hole 31b and are engaged with the actuating member 33b. A diametrical size of the hole 31b is varied dependent upon different relative positions of the plurality of plates 34b, and the actuating member 33b is operable to move relative positions of the plurality of plates 34b. D3 indicates a diametrical size of the hole 31b. The actuating member 33b includes a control input 334b for facilitating operation thereof. The control input 334b defines an extension projection from the annular structure 331b of the actuating member 33b. The control input 334b projects radially away from the outer periphery of the actuating member 33b.
Each of the plurality of plates 34b has a crescent shape. The plurality of plates 34b are stacked together one after another. The actuating member 33b is pivotal about an axis of the control head 10, and the plurality of plates 34b are rotated circumferentially and selectively move close to or away from a center axis C of the hole 31b with respect to a pivotal movement of the actuating member 34b.
Two opposite ends of each of the plurality of plates 34b each include a second joining end 341b, and each of the plurality of plates 34b includes one second joining end 341b engaged with one of the plurality of first joining ends 332b and the other second joining end 341b engaged with one of a plurality of embedding sections 114b of the control head 10. The plurality of embedding sections 114b are defined on the base.
The plurality of first joining ends 332b define a plurality of apertures and the plurality of second joining ends 341b define a plurality of projections respectively, and each of the plurality of plates 34b includes a top surface thereof including one of the two projections projecting therefrom and engaged with one of the plurality of apertures and a bottom surface thereof including the other of the two projections projecting therefrom engaging with one of the plurality of embedding sections 114b. The plurality of embedding sections 114b define a plurality of recesses.
In view of the forgoing, the stack effect occurs in each of the adjustable vortex flame devices, and the negative pressure due to the stack effect in the shield 40 can induce the outside air into the adjustable vortex flame device. The Coanda effect also occurs in each of the adjustable vortex flame devices, with the outside air in the adjustable vortex flame device guided by the plurality of vanes 21 of the flow guiding mechanism 20 to flow spirally in the shield 40 and to attach to an inner peripheral wall of the shield 40. With the flow guiding mechanism 20, the Coanda effect in the adjustable vortex flame device is effective, so a flame of the adjustable vortex flame device is stable and smooth. Furthermore, the control mechanisms 30, 30a, and 30b delimit the holes 31, 31a, and 31b which vary with respect to different sizes of vortex flames of the adjustable vortex flame device, and each of the holes 31, 31a, and 31b is in a smaller diametrical size than the opening 13 so it is obvious to see vorticities of a vortex flame of each of the adjustable vortex flame devices.
While the specific embodiments have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of invention, and the scope of invention is only limited by the scope of accompanying claims.
