Wind Resistant Outdoor Heater Burner

Abstract

A windproof outdoor heater burner includes a casing and a flow-guiding device. The casing includes an inlet and an outlet. The flow-guiding device includes an inlet pipe connected to the inlet, a flow-guiding member, and a diffuser plate connected to the outlet. The flow-guiding member is connected to the inlet pipe. The flow-guiding member includes a flow-guiding channel therein and a plurality of first through-holes. Each first through-hole includes a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with a chamber of the casing. The diffuser plate includes a plurality of first exhaust holes located between two sides thereof and intercommunicated with the chamber of the casing. The first exhaust holes are not aligned with the flow-guiding member.

Claims

1. A windproof outdoor heater burner comprising: a casing defining a chamber and including an inlet and an outlet; and a flow-guiding device including an inlet pipe, a flow-guiding member, and a diffuser plate, wherein the inlet pipe is connected to the inlet, wherein the inlet pipe includes a first end and a second end opposite to the first end, wherein the first end of the inlet pipe is located outside of the casing, wherein the second end of the inlet pipe is located in the chamber of the casing, wherein the flow-guiding member is mounted in the chamber of the casing and is connected to the second end of the inlet pipe, wherein the flow-guiding member includes a flow-guiding channel therein and a plurality of first through-holes, wherein each of the plurality of the first through-holes includes a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, wherein the flow-guiding channel includes a first area extending non-rectilinearly from the second end of the inlet pipe to the plurality of first through-holes, wherein the diffuser plate is connected to the outlet and includes a first side and a second side opposite to the first side, wherein the diffuser plate further includes a plurality of first exhaust holes located between the first side and the second side and intercommunicated with the chamber of the casing, and wherein the plurality of first exhaust holes is not aligned with the flow-guiding member.

2. The windproof outdoor heater burner as claimed in claim 1, wherein the flow-guiding channel includes a first section and a second section at a non-parallel angle to the first section to form a turn therebetween, wherein the first section intercommunicates with the inlet pipe, wherein the first section and the second section are connected and intercommunicate with each other, wherein the flow-guiding member further includes a first baffle adjacent to an inner periphery of the first section, wherein the first baffle is on a side of the first section opposite to the inlet pipe and faces the second end of the inlet pipe, wherein the flow-guiding member further includes a second baffle adjacent to an inner periphery of the second section, wherein the second baffle is on a side of the second section opposite to the first section and faces an end of the first section adjacent to the second section, wherein the plurality of first through-holes is located on a side of the flow-guiding member adjacent to the second section but opposite to the second baffle.

3. The windproof outdoor heater burner as claimed in claim 2, wherein the flow-guiding channel further includes a third section, wherein the third section is connected and intercommunicates with an end of the first section opposite to the second section, wherein the first section is at a non-parallel angle to the third section to form a turn therebetween, wherein the flow-guiding member further includes a third baffle adjacent to an inner periphery of the third section, wherein the third baffle is on a side of the third section opposite to first section and faces an end of the first section opposite to the second section, wherein a side of the flow-guiding member adjacent to the third section but opposite to the third baffle includes a plurality of second through-holes, wherein each of the plurality of second through-holes has a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, and wherein the flow-guiding channel includes a second area extending non-rectilinearly from the second end of the inlet pipe to the plurality of second through-holes.

4. The windproof outdoor heater burner as claimed in claim 3, wherein the flow-guiding channel further includes a fourth section and a fifth section, wherein the fourth section is connected with the first section and the second section and extends in a direction away from the second section, wherein the second section and the fourth section extend along a same axis parallel to a longitudinal axis, wherein the second baffle is located adjacent to the inner periphery of the second section and an inner periphery of the fourth section, wherein a turn is formed between the first section and the fourth section, wherein a side of the flow-guiding member adjacent to the fourth section but opposite to the second baffle includes a plurality of third through-holes, wherein each of the plurality of the third through-holes has a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, wherein the flow-guiding channel further includes a third area extending non-rectilinearly from the second end of the inlet pipe to the plurality of third through-holes, wherein the fifth section is connected to the first section and the third section and extends in a direction away from the third section, wherein the third section and the fifth section extend along a same axis parallel to the longitudinal axis, wherein the third baffle is adjacent to the inner periphery of the third section and an inner periphery of the fifth section, wherein a turn is formed between the first section and the fifth section, wherein a side of the flow-guiding member adjacent to the fifth section but opposite to the third baffle includes a plurality of fourth through-holes, wherein each of the plurality of fourth through-holes has a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, wherein the flow-guiding channel further includes a fourth area extending non-rectilinearly from the second end of the inlet pipe to the plurality of fourth through-holes.

5. The windproof outdoor heater burner as claimed in claim 2, wherein the inlet and the outlet are respectively defined in two adjacent sides of the casing, wherein the inlet pipe further includes a neck located between the first end and the second end of the inlet pipe and received in the inlet of the casing, wherein an inner cross-sectional area of the neck perpendicular to a longitudinal axis is smaller than an inner cross-sectional area of the first end or the second end of the inlet pipe perpendicular to the longitudinal axis, wherein a sum of areas of the plurality of first exhaust holes in the diffuser plate is larger than the inner cross-sectional area of the neck.

6. The windproof outdoor heater burner as claimed in claim 2, wherein the plurality of first exhaust holes in the diffuser plate has gradually reducing areas from the first side to the second side along a longitudinal axis, wherein the first side of the diffuser plate is adjacent to the inlet of the casing, and wherein the second side of the diffuser plate is adjacent to a side of the casing opposite to the inlet.

7. The outdoor windproof heater burner as claimed in claim 3, wherein the flow-guiding device further includes a first partitioning member abutting a side of the diffuser plate opposite to the casing and extending away from the casing, wherein the first partitioning member is aligned with an area of the diffuser plate having the plurality of first exhaust holes, and wherein the plurality of first exhaust holes is divided into two sections by the first partitioning member.

8. The windproof outdoor heater burner as claimed in claim 7, wherein the flow-guiding device further includes a second partitioning member and a third partitioning member, wherein the second partitioning member and the third partitioning member abut the side of the diffuser plate opposite to the casing and extend away from the casing, wherein the second partitioning member is aligned with the area of the diffuser plate having the plurality of first exhaust holes, wherein the plurality of exhaust holes is divided into two sections by the second partitioning member, wherein an extending direction of the first partitioning member is parallel to an extending direction of the second partitioning member, wherein an extending direction of the third partitioning member is perpendicular to the extending direction of the first partitioning member, and wherein the third partitioning member intersects with the first partitioning member and the second partitioning member.

9. The windproof outdoor heater burner as claimed in claim 8, wherein the flow-guiding device further includes a ceramic plate disposed on the side of the diffuser plate opposite to the casing, wherein the ceramic plate includes a plurality of through-holes extending from a side of the ceramic plate adjacent to the diffuser plate through another side of the ceramic plate opposite to the diffuser plate, wherein the ceramic plate abuts a side of the first partitioning member, a side of the second partitioning member, and a side of the third partitioning member, and wherein the sides of the first, second, and third partitioning members are opposite to the diffuser plate.

10. The windproof outdoor heater burner as claimed in claim 4, wherein the inlet and the outlet are respectively defined in two adjacent sides of the casing, wherein the inlet pipe further includes a neck located between the first end and the second end of the inlet pipe and received in the inlet of the casing, wherein an inner cross-sectional area of the neck perpendicular to the longitudinal axis is smaller than an inner cross-sectional area of the first end or the second end perpendicular to the longitudinal axis, wherein the diffuser plate further includes a plurality of second exhaust holes located between the first side and the second side, intercommunicated with the chamber of the casing, and not aligned with the flow-guiding member, and wherein a sum of areas of the plurality of first exhaust holes and the plurality of second exhaust holes in the diffuser plate is larger than the inner cross-sectional area of the neck perpendicular to the longitudinal axis.

11. The windproof outdoor heater burner as claimed in claim 10, wherein the plurality of first exhaust holes in the diffuser plate has gradually reducing areas from the first side to the second side along the longitudinal axis, wherein the first side of the diffuser plate is adjacent to the inlet of the casing, wherein the second side of the diffuser plate is adjacent to a side of the casing opposite to the inlet, and wherein the plurality of second exhaust holes in the diffuser plate has gradually reducing areas from the second side to the first side along the longitudinal axis.

12. The windproof outdoor heater burner as claimed in claim 11, wherein the first section of the flow-guiding channel is aligned with an area of the diffuser plate having the plurality of first exhaust holes and the plurality of several second exhaust holes.

13. The windproof outdoor heater burner as claimed in claim 2, wherein the flow-guiding device further includes a ceramic plate on a side of the diffuser plate opposite to the casing, wherein the ceramic plate includes a plurality of through-holes extending from a side of the ceramic plate adjacent to the diffuser plate through another side of the ceramic plate opposite to the diffuser plate.

14. A windproof outdoor heater burner comprising: a casing defining a chamber and including an inlet and an outlet; and a flow-guiding device including an inlet pipe, a first partitioning member, and a diffuser plate, wherein the inlet pipe is connected to the inlet, wherein the diffuser plate is connected to the outlet and includes a first side and a second side opposite to the first side, wherein the diffuser plate further includes a plurality of first exhaust holes located between the first side and the second side and intercommunicated with the chamber of the casing, wherein the first partitioning member abuts a side of the diffuser plate opposite to the casing and extends away from the casing, wherein the first partitioning member is aligned with an area of the diffuser plate having the plurality of first exhaust holes, and wherein the plurality of first exhaust holes is divided into two sections by the first partitioning member.

15. The windproof outdoor heater burner as claimed in claim 14, wherein the flow-guiding device further includes a second partitioning member and a third partitioning member, wherein the second partitioning member and the third partitioning member abut the side of the diffuser plate opposite to the casing and extend away from the casing, wherein the second partitioning member is aligned with the area of the diffuser plate having the plurality of first exhaust holes, wherein the plurality of exhaust holes is divided into two sections by the second partitioning member, wherein an extending direction of the first partitioning member is parallel to an extending direction of the second partitioning member, wherein an extending direction of the third partitioning member is perpendicular to the extending direction of the first partitioning member, and wherein the third partitioning member intersects with the first partitioning member and the second partitioning member.

16. The windproof outdoor heater burner as claimed in claim 15, wherein the flow-guiding device further includes a ceramic plate disposed on the side of the diffuser plate opposite to the casing, wherein the ceramic plate includes a plurality of through-holes extending from a side of the ceramic plate adjacent to the diffuser plate through another side of the ceramic plate opposite to the diffuser plate, wherein the ceramic plate abuts a side of the first partitioning member, a side of the second partitioning member, and a side of the third partitioning member, and wherein the sides of the first, second, and third partitioning members are opposite to the diffuser plate.

17. The windproof outdoor heater burner as claimed in claim 14, wherein the flow-guiding device includes a flow-guiding member, wherein the inlet pipe includes a first end and a second end opposite to the first end, wherein the first end of the inlet pipe is located outside of the casing, wherein the second end of the inlet pipe is located in the chamber of the casing, wherein the flow-guiding member is mounted in the chamber of the casing and is connected to the second end of the inlet pipe, wherein the flow-guiding member includes a flow-guiding channel therein and a plurality of first through-holes, wherein each of the plurality of the first through-holes includes a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, wherein the flow-guiding channel includes a first area extending non-rectilinearly from the second end of the inlet pipe to the plurality of first through-holes, and wherein the plurality of first exhaust holes is not aligned with the flow-guiding member.

18. The windproof outdoor heater burner as claimed in claim 17, wherein the flow-guiding channel includes a first section and a second section at a non-parallel angle to the first section to form a turn therebetween, wherein the first section intercommunicates with the inlet pipe, wherein the first section and the second section are connected and intercommunicate with each other, wherein the flow-guiding member further includes a first baffle adjacent to an inner periphery of the first section, wherein the first baffle is on a side of the first section opposite to the inlet pipe and faces the second end of the inlet pipe, wherein the flow-guiding member further includes a second baffle adjacent to an inner periphery of the second section, wherein the second baffle is on a side of the second section opposite to the first section and faces an end of the first section adjacent to the second section, wherein the plurality of first through-holes is located on a side of the flow-guiding member adjacent to the second section but opposite to the second baffle.

19. The windproof outdoor heater burner as claimed in claim 18, wherein the flow-guiding channel further includes a third section, wherein the third section is connected and intercommunicates with an end of the first section opposite to the second section, wherein the first section is at a non-parallel angle to the third section to form a turn therebetween, wherein the flow-guiding member further includes a third baffle adjacent to an inner periphery of the third section, wherein the third baffle is on a side of the third section opposite to first section and faces an end of the first section opposite to the second section, wherein a side of the flow-guiding member adjacent to the third section but opposite to the third baffle includes a plurality of second through-holes, wherein each of the plurality of second through-holes has a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, and wherein the flow-guiding channel includes a second area extending non-rectilinearly from the second end of the inlet pipe to the plurality of second through-holes.

20. The windproof outdoor heater burner as claimed in claim 19, wherein the flow-guiding channel further includes a fourth section and a fifth section, wherein the fourth section is connected with the first section and the second section and extends in a direction away from the second section, wherein the second section and the fourth section extend along a same axis parallel to a longitudinal axis, wherein the second baffle is located adjacent to the inner periphery of the second section and an inner periphery of the fourth section, wherein a turn is formed between the first section and the fourth section, wherein a side of the flow-guiding member adjacent to the fourth section but opposite to the second baffle includes a plurality of third through-holes, wherein each of the plurality of the third through-holes has a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, wherein the flow-guiding channel further includes a third area extending non-rectilinearly from the second end of the inlet pipe to the plurality of third through-holes, wherein the fifth section is connected to the first section and the third section and extends in a direction away from the third section, wherein the third section and the fifth section extend along a same axis parallel to the longitudinal axis, wherein the third baffle is adjacent to the inner periphery of the third section and an inner periphery of the fifth section, wherein a turn is formed between the first section and the fifth section, wherein a side of the flow-guiding member adjacent to the fifth section but opposite to the third baffle includes a plurality of fourth through-holes, wherein each of the plurality of fourth through-holes has a first end intercommunicated with the flow-guiding channel and a second end intercommunicated with the chamber of the casing, and wherein the flow-guiding channel further includes a fourth area extending non-rectilinearly from the second end of the inlet pipe to the plurality of fourth through-holes.

21. The windproof outdoor heater burner as claimed in claim 19, wherein the inlet and the outlet are respectively defined in two adjacent sides of the casing, wherein the inlet pipe further includes a neck located between the first end and the second end of the inlet pipe and received in the inlet of the casing, wherein an inner cross-sectional area of the neck perpendicular to a longitudinal axis is smaller than an inner cross-sectional area of the first end or the second end of the inlet pipe perpendicular to the longitudinal axis, and wherein a sum of areas of the plurality of first exhaust holes in the diffuser plate is larger than the inner cross-sectional area of the neck.

22. The windproof outdoor heater burner as claimed in claim 19, wherein the plurality of first exhaust holes in the diffuser plate has gradually reducing areas from the first side to the second side along a longitudinal axis, wherein the first side of the diffuser plate is adjacent to the inlet of the casing, and wherein the second side of the diffuser plate is adjacent to a side of the casing opposite to the inlet.

23. The windproof outdoor heater burner as claimed in claim 20, wherein the inlet and the outlet are respectively defined in two adjacent sides of the casing, wherein the inlet pipe further includes a neck located between the first end and the second end of the inlet pipe and received in the inlet of the casing, wherein an inner cross-sectional area of the neck perpendicular to the longitudinal axis is smaller than an inner cross-sectional area of the first end or the second end perpendicular to the longitudinal axis, wherein the diffuser plate further includes a plurality of second exhaust holes located between the first side and the second side, intercommunicated with the chamber of the casing, and not aligned with the flow-guiding member, and wherein a sum of areas of the plurality of first exhaust holes and the plurality of second exhaust holes in the diffuser plate is larger than the inner cross-sectional area of the neck perpendicular to the longitudinal axis.

24. The windproof outdoor heater burner as claimed in claim 23, wherein the plurality of first exhaust holes in the diffuser plate has gradually reducing areas from the first side to the second side along the longitudinal axis, wherein the first side of the diffuser plate is adjacent to the inlet of the casing, wherein the second side of the diffuser plate is adjacent to a side of the casing opposite to the inlet, and wherein the plurality of second exhaust holes in the diffuser plate has gradually reducing areas from the second side to the first side along the longitudinal axis.

25. The windproof outdoor heater burner as claimed in claim 24, wherein the first section of the flow-guiding channel is aligned with an area of the diffuser plate having the plurality of first exhaust holes and the plurality of several second exhaust holes.

Description

DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 is a perspective view of a windproof outdoor burner heater of a first embodiment according to the present invention.

[0030] FIG. 2 is an exploded, perspective view of the windproof outdoor burner heater of FIG. 1.

[0031] FIG. 3 is a perspective view of a casing and a flow-guiding device of the windproof outdoor burner heater of FIG. 1.

[0032] FIG. 4 is a view similar to FIG. 3 with a ceramic plate detached from the flow-guiding device of FIG. 3.

[0033] FIG. 5 is an exploded, perspective view of the flow-guiding device and the casing of FIG. 4.

[0034] FIG. 6 is a cross-sectional view illustrating use of the windproof outdoor burner heater of FIG. 1.

[0035] FIG. 7 is another cross-sectional view illustrating use of the windproof outdoor burner heater of FIG. 1 subject to a wind.

[0036] FIG. 8 is an exploded, perspective view of a casing and a flow-guiding device of a windproof outdoor burner heater of a second embodiment according to the present invention.

[0037] FIG. 9 is a cross-sectional view illustrating use of the windproof outdoor burner heater of FIG. 8.

[0038] FIG. 10 is a perspective view of a casing and a flow-guiding device of a windproof outdoor burner heater of a third embodiment according to the present invention.

[0039] FIG. 11 is an exploded, perspective view of the casing and the flow-guiding device of the windproof outdoor burner heater of FIG. 10.

[0040] FIG. 12 is a cross-sectional view illustrating use of the windproof outdoor burner heater of FIG. 10.

DETAILED DESCRIPTION OF THE INVENTION

[0041] With reference to FIGS. 1-7, a windproof outdoor heater burner 10 (hereinafter referred to as the heater burner 10) of a first embodiment according to the present invention includes a casing 20 and a flow-guiding device 30. The casing 20 defines a chamber and includes an inlet 21 and an outlet 22 spaced from the inlet 21 in a longitudinal direction. The inlet 21 and the outlet 22 intercommunicate with the chamber.

[0042] The flow-guiding device 30 includes an inlet pipe 31, a flow-guiding member 32, and a diffuser plate 33. The inlet pipe 31 is connected to the inlet 21 and includes a first end 311 and a second end 312 opposite to the first end 311. The first end 311 of the inlet pipe 31 is located outside of the casing 20. The second end 312 of the inlet pipe 31 is located in the chamber of the casing 20. The inlet pipe 31 further includes a neck 313 located between the first end 311 and the second end 312 and received in the inlet 21 of the casing 20. An inner cross-sectional area of the neck 313 perpendicular to the longitudinal axis is smaller than an inner cross-sectional area of the first end 311 or the second end 312 of the inlet pipe 31 perpendicular to the longitudinal axis.

[0043] The flow-guiding member 32 is mounted in the chamber of the casing 20 and is connected to the second end 312 of the inlet pipe 31. The flow-guiding member 32 includes a flow-guiding channel 34 therein and a plurality of first through-holes 321. Each first through-hole 321 includes a first end intercommunicated with the flow-guiding channel 34 and a second end intercommunicated with the chamber of the casing 20. The flow-guiding channel 34 includes a first area extending non-rectilinearly from the second end 312 of the inlet pipe 31 to the first through-holes 321. The flow-guiding channel 34 includes a first section 341 and a second section 342 at a non-parallel angle to the first section 341 to form a turn therebetween. The first section 341 intercommunicates with the inlet pipe 31. The first section 341 and the second section 342 are connected and intercommunicate with each other.

[0044] The flow-guiding member 32 further includes a first baffle 322 adjacent to an inner periphery of the first section 341. The first baffle 322 is on a side of the first section 341 opposite to the inlet pipe 31 and faces the second end 312 of the inlet pipe 31. The flow-guiding member 32 further includes a second baffle 323 adjacent to an inner periphery of the second section 342. The second baffle 323 is on a side of the second section 342 opposite to the first section 341 and faces an end of the first section 341 opposite to the inlet pipe 31. The first through-holes 321 are located on a side of the flow-guiding member 32 adjacent to the second section 342 but opposite to the second baffle 323.

[0045] The flow-guiding channel 34 further includes a third section 343 connected and intercommunicated with an end of the first section 341 opposite to the second section 342. The first section 341 is at a non-parallel angle to the third section 343 to form a turn therebetween.

[0046] The flow-guiding member 32 further includes a third baffle 324 adjacent to an inner periphery of the third section 343. The third baffle 324 is on a side of the third section 343 opposite to first section 341 and faces an end of the first section 341 opposite to the second section 342. A side of the flow-guiding member 32 adjacent to the third section 343 but opposite to the third baffle 324 includes a plurality of second through-holes 325. Each second through-hole 325 has a first end intercommunicated with the flow-guiding channel 34 and a second end intercommunicated with the chamber of the casing 20. The flow-guiding channel 34 includes a second area extending non-rectilinearly from the second end 312b of the inlet pipe 31 to the second through-holes 325.

[0047] The diffuser plate 33 is connected to the outlet 22 and includes a first side 331 and a second side 332 opposite to the first side 331. The diffuser plate 33 further includes a plurality of first exhaust holes 333 located between the first side 331 and the second side 332 and intercommunicated with the chamber of the casing 20. The first exhaust holes 333 are not aligned with the flow-guiding member 32. The first exhaust holes 333 in the diffuser plate 33 have gradually reducing areas from the first side 331 to the second side 332 along the longitudinal axis. The sum of areas of the first exhaust holes 333 in the diffuser plate 33 is larger than the inner cross-sectional area of the neck 313 perpendicular to the longitudinal axis. The first side 331 is adjacent to the inlet 21 of the casing 21. The second side 332 is adjacent to a side of the casing 20 opposite to the inlet 21.

[0048] The flow-guiding device 30 further includes a first partitioning member 35, a second partitioning member 36, and a third partitioning member 37. The first partitioning member 35 abuts a side of the diffuser plate 33 opposite to the casing 20 and extends from the casing 20. The first partitioning member 35 is aligned with an area of the diffuser plate 33 having the first exhaust holes 333. The first exhaust holes 333 are divided into two sections by the first partitioning member 35. The second partitioning member 36 and the third partitioning member 37 abut the side of the diffuser plate 33 opposite to the casing 20 and extend away from the casing 20. The second partitioning member 36 is aligned with the area of the diffuser plate 33 having the first exhaust holes 333. The exhaust holes 333 are divided into two sections by the second partitioning member 36. The extending direction of the first partitioning member 35 is parallel to the extending direction of the second partitioning member 36. The extending direction of the third partitioning member 37 is perpendicular to the extending direction of the first partitioning member 35. The third partitioning member 37 intersects with the first partitioning member 35 and the second partitioning member 36.

[0049] The flow-guiding device 30 further includes a ceramic plate 38 disposed on the side of the diffuser plate 33 opposite to the casing 20. The ceramic plate 38 includes a plurality of through-holes 381 extending from a side of the ceramic plate 38 adjacent to the diffuser plate 33 through another side of the ceramic plate 38 opposite to the diffuser plate 30. The ceramic plate 38 abuts a side of the first partitioning member 35, a side of the partitioning member 36, and a side of the partitioning member 37. The sides of the first, second, and third partitioning members 35, 36, 37 are opposite to the diffuser plate 33.

[0050] The heater burner 10 with the above structure permits the gas and air in the casing 20 to be mixed uniformly to increase the heating efficiency during combustion of the gas mixture and reducing the waste of the gas while achieving an excellent windproof effect. Extinction or backfire of the flame of the heater burner 10 will not occur even subjected to a strong wind, increasing the use safety. After entering the casing 20, the gas passes through the flow-guiding channel 34 that extends non-rectilinearly, such that the gas is stopped and deflected by the first baffle 322, the second baffle 323, and the third baffle 324 to increase the turbulent effect for more uniformly mixing the gas and the air. The pressure and the concentration of the gas in the gas-mixing chamber are stable. Then, the gas mixture flows through the chamber of the casing 20, the diffuser plate 33, and the ceramic plate 38 for subsequent ignition. The heat energy generated by the combustion of the gas mixture is transmitted to the ambience of the heater burner 10 through radiation to increase the outside temperature (see FIG. 6).

[0051] With reference to FIG. 7, when the heater burner 10 is subject to a wind from the front side, the wind passing through the ceramic plate 38 will not directly enter the flow-guiding channel 34 even if the wind enters the casing 20, because the first exhaust holes 333 of the diffuser plate 33 are not aligned with the flow-guiding channel 34. Furthermore, the first exhaust holes 333 in the diffuser plate 33 have gradually reducing areas from the first side 331 to the second side 332 along the longitudinal axis, such that the wind is apt to enter the casing 20 from an area adjacent to the first side 331 and then flows out of another area adjacent to the second side 332. Thus, even if the heater burner 10 is subjected to a wind, the flame keeps burning at the outside of the ceramic plate 38 without the risk of extinction and backfire.

[0052] FIGS. 8 and 9 show a heater burner 10 of a second embodiment according to the present invention which is substantially the same as the first embodiment. The main differences between the second embodiment and the first embodiment are that the flow-guiding channel 34a in the second embodiment includes a first section 341a and a second section 342a at a non-parallel angle to the first section 341a to form a turn therebetween. The first section 341a intercommunicates with the inlet pipe 31a. The first section 341a and the second section 342a are connected and intercommunicate with each other.

[0053] The flow-guiding member 32a includes a first baffle 322a adjacent to an inner periphery of the first section 341a. The first baffle 322a is on a side of the first section 341a opposite to the inlet pipe 31a and faces the second end 312a of the inlet pipe 31a. The flow-guiding member 32a further includes a second baffle 323a adjacent to an inner periphery of the second section 342a. The second baffle 323a is on a side of the second section 342a opposite to the first section 341a and faces an end of the second section 342a opposite to the first section 341a. The first through-holes 321a are located on a side of the flow-guiding member 32a adjacent to the second section 342a but opposite to the second baffle 323a.

[0054] FIGS. 10-12 show a heater burner 10 of a third embodiment according to the present invention which is substantially the same as the first embodiment. The main differences between the third embodiment and the first embodiment are that the flow-guiding channel 34b further includes a fourth section 344b and a fifth section 345b. The fourth section 344b is connected with the first section 341b and the second section 342b and extends in a direction away from the second section 342b. The second section 342b and the fourth section 344b extend along the same axis parallel to the longitudinal axis. The second baffle 323b is located adjacent to the inner periphery of the second section 342b and an inner periphery of the fourth section 344b. A turn is formed between the first section 341b and the fourth section 344b. A side of the flow-guiding member 32b adjacent to the fourth section 344b but opposite to the second baffle 323b includes a plurality of third through-holes 326b. Each third through-hole 326b has a first end intercommunicated with the flow-guiding channel 34b and a second end intercommunicated with the chamber of the casing 20b. The flow-guiding channel 34b further includes a third area extending non-rectilinearly from the second end 312b of the inlet pipe 31b to the third through-holes 326b.

[0055] The fifth section 345b is connected to the first section 341b and the third section 343b and extends in a direction away from the third section 343b. The third section 343b and the fifth section 345b extend along the same axis parallel to the longitudinal axis. The third baffle 324b is adjacent to the inner periphery of the third section 343b and an inner periphery of the fifth section 345b. A turn is formed between the first section 341b and the fifth section 345b. A side of the flow-guiding member 32b adjacent to the fifth section 345b but opposite to the third baffle 324b includes a plurality of fourth through-holes 327b. Each fourth through-holes 327b has first end intercommunicated with the flow-guiding channel 34b and a second end intercommunicated with the chamber of the casing 20b. The flow-guiding channel 34b further includes a fourth area extending non-rectilinearly from the second end 312b of the inlet pipe 31b to the fourth through-holes 327b.

[0056] The diffuser plate 33b further includes a plurality of second exhaust holes 334b located between the first side 331b and the second side 332b, intercommunicated with the chamber of the casing 20b, and not aligned with the flow-guiding member 32b. The second exhaust holes 334b in the diffuser plate 33b have gradually reducing areas from the second side 332b to the first side 331b along the longitudinal axis. The sum of areas of the first exhaust holes 333b and the second exhaust holes 334b in the diffuser plate 33b is larger than the inner cross-sectional area of the neck 313b perpendicular to the longitudinal axis. The first section 341b is aligned with an area of the diffuser plate 33b having the first exhaust holes 333b and the second exhaust holes 334b.

[0057] The heater burner 10 according to the present invention permits the gas and air in the casing 20 to be mixed uniformly to increase the heating efficiency during combustion of the gas mixture and reducing the waste of the gas while achieving an excellent windproof effect.

[0058] Although specific embodiments have been illustrated and described, numerous modifications and variations are still possible without departing from the scope of the invention. The scope of the invention is limited by the accompanying claims.