Gas heating device

Abstract

A gas heating device includes a main body defining a combustion chamber, a catalyst disposed in the combustion chamber, and an electric thermal device providing electric thermal energy to heat the catalyst and disposed in the combustion chamber and adjacent to a side of the catalyst.

Claims

1. A gas heating device comprising: a main body defining a combustion chamber, wherein the main body includes a base and a gas conduit carrying a combustible gas and extending through the base and connected to and in fluid communication with the combustion chamber; a catalyst disposed in the combustion chamber, wherein the catalyst is connected to the gas conduit; a heating coil providing electric thermal energy to heat the catalyst and disposed in the combustion chamber completely outside of the catalyst and adjacent to a side of the catalyst, wherein the heating coil includes a coil wire which is looped to form a plurality of loops, with the catalyst being of a cylindrical shape, and wherein the plurality of loops is coaxial to each other and is located outside of the cylindrical shape of the catalyst; a first conducting wire; and a second conducting wire, with the heating coil including first and second ends thereof respectively connecting to first ends of the first and second conducting wires, wherein the first ends of the first and second conducting wires and the heating coil are disposed in the combustion chamber, and wherein the first and second conducting wires extend through the base and each have an end disposed outside the combustion chamber.

2. The gas heating device as claimed in claim 1, wherein the coil wire is made of high electrical resistivity material and is made of metal.

3. The gas heating device as claimed in claim 1, wherein the catalyst includes an end thereof opposing the base and defining an opening, wherein the catalyst is meshed and defines a hollow channel.

4. The gas heating device as claimed in claim 1, wherein the catalyst includes an end thereof opposing the base and defining an opening, wherein the catalyst is meshed and defines a hollow channel.

5. The gas heating device as claimed in claim 4, wherein the hollow channel is cylindrical, and wherein the catalyst includes an outer periphery and defines a plurality of meshes disposed on the outer periphery circumferentially and enclosing the hollow channel, with the gas conduit having a passageway in fluid communication with the hollow channel, with the passageway having a smaller cross section than the hollow channel.

6. The gas heating device as claimed in claim 5, wherein the heating coil is disposed outside the outer periphery of the catalyst and intermediate and spaced from the base and the opening of the catalyst.

7. The gas heating device as claimed in claim 6, wherein the heating coil is disposed at a height not taller than a height of the opening of the catalyst.

8. The gas heating device as claimed in claim 1 further comprising an outer shell disposed on the base and enclosing the combustion chamber and the catalyst.

9. The gas heating device as claimed in claim 8, wherein the outer shell includes an end thereof opposing the base and defining an open port.

10. The gas heating device as claimed in claim 9, wherein the outer shell includes an outer periphery and defines at least one through orifice disposed on the outer periphery.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a gas heating device in accordance with the present invention.

(2) FIG. 2 is an exploded perspective view of the gas heating device of the present invention.

(3) FIG. 3 is a cross-sectional view of the gas heating device of the present invention.

(4) FIG. 4 is another cross-sectional view of the gas heating device of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(5) FIGS. 1 through 4 show a gas heating device 10 in accordance with the present invention.

(6) A main body 20 defines a combustion chamber 21, a base 23, and a gas conduit 25 extending through the base 23 and connected to and in fluid communication with the combustion chamber 21.

(7) A catalyst 22 is disposed in the combustion chamber 21. The catalyst 22 is connected to the gas conduit 25. The catalyst 22 includes an end thereof opposing the base 23 and defining an opening 26. The catalyst 22 is meshed and defines a hollow channel. The opening 26 is defined at an end of the hollow channel. The hollow channel is cylindrical. The catalyst 22 includes an outer periphery and defines a plurality of meshes disposed on the outer periphery circumferentially and enclosing the hollow channel. The plurality of meshes is connected to and in fluid communication with the hollow channel and the combustion chamber 21.

(8) An electric thermal device 30 provides electric thermal energy to heat the catalyst 22 and is disposed in the combustion chamber 21 and adjacent to a side of the catalyst 22. The electric thermal device 30 includes a first conducting wire 31 and a second conducting wire 32, and a heating coil 33 includes first and second ends thereof respectively connecting to first ends of the first and second conducting wires 31 and 32. The first ends of the first and second conducting wires 31 and 32 and the heating coil 33 are disposed in the combustion chamber 21. The first and second conducting wires 31 and 32 extend through the base 23, and each have an end disposed outside the combustion chamber 21. The heating coil 33 is disposed outside the outer periphery of the catalyst 22. The heating coil 33 is disposed at a height not taller than a height of the opening 26 of the catalyst 22. The heating coil 33 includes a wire which is looped, which is made of high electrical resistivity material and which is made of metal. The heating coil 33 includes the wire which is looped to form a plurality of loops. The plurality of loops is coaxial to each other.

(9) An outer shell 24 is disposed on the base 23 and encloses the combustion chamber 21 and the catalyst 22. The outer shell 24 includes an end thereof opposing the base 23 and defining an open port. The outer shell 24 includes an outer periphery and defines at least one through orifice disposed on the outer periphery. The though orifices allow outside ambient air to flow in the combustion chamber 21. The outer shell 24 also protects a user of the gas heating device 10 from burns.

(10) The electric thermal device 30 generates heat, which is in a range between 280 degrees Celsius and 500 degrees Celsius. The catalyst 22 is reacted by the heat generated by the electric thermal device 30. Because a side of the catalyst 22 is disposed adjacent to the electric thermal device 30, the heat generated by the electric thermal device 30 can render the catalyst 22 active.

(11) In view of the forgoing, the electric thermal device 30 does not flash burn the catalyst 22. Rather than using a piezoelectric type of ignition device or an ignition device that generates an electric arc, the electric thermal device 30 provides electric thermal energy to heat the catalyst 22. Advantageously, the catalyst 22 is rendered active more easily than conventional ways and includes a longer activity life.

(12) The foregoing is merely illustrative of the principles of this invention and various modifications can be made by those skilled in the art without departing from the scope and spirit of the invention.