JP3237174B2 - Combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus which uses a liquid fuel such as petroleum as a fuel and is used for a water heater or a heater.

[0002]

2. Description of the Related Art Conventionally, this type of combustion apparatus has a configuration as shown in FIGS. As shown in the figure, a nozzle 3 communicating with a fuel pump 4 faces a carburetor 1 having a built-in heater 2. Reference numeral 5 denotes a vaporizer cover for providing heat insulating material on the inner surface to insulate the heat of the vaporizer 1. Reference numeral 6 denotes a burner head connected to the vaporizer 1. In addition, the burner case 6a is arranged on both end rows 8a so as to be located at the secondary air port 8, and the outer periphery except for a portion connected to the carburetor 1 is covered with a burner case 6a. 9 is a mixing chamber provided below the vaporizer and the burner head, 10 is an igniter facing the flame opening 7, and 11 is a blower for sending combustion air or the like. Reference numeral 12 denotes a vaporizer 1, a burner head 6, and a mixing chamber 9.
It is a main body case that covers etc.

In the above configuration, when the heater 2 is energized and the vaporizer 1 reaches a predetermined temperature, the fuel pump 4 and the blower 11
Is operated, and fuel is ejected from the nozzle 3 to become a vaporized gas in the vaporizer 1. Part of the air for combustion is supplied into the vaporizer 1 and mixed with the vaporized gas to become a premixed gas, which is ejected from the flame opening 7 of the burner head 6 through the internal space of the mixing chamber 9. Other air is supplied from a secondary air port of the burner head 6 through a space 12a between the burner head 6 and the main body case 12. The premixed gas ejected from the flame port 7 is ignited by the igniter 10 to form a combustion flame, and the secondary air supplied from the secondary air port 8 forms a stable flame and burns.

[0004]

In the above-mentioned conventional structure, since the secondary air ports 8 are arranged in both end rows 8a of the burner head 6, the burner head 6 is formed in the flame ports 7 by the secondary air flow. The flame and the burner case 6a are isolated.
However, at the end of the burner head 6 opposite to the connection with the carburetor 1, the flame formed in the flame opening 7 directly touches the surface of the burner case 6a, so that the flame is cooled and the combustion process is interrupted. There have been problems in that complete combustion occurs, and the burner case 6a is heated to a high temperature to cause deformation and corrosion due to oxidation.

[0005] The present invention solves the above-mentioned problem, and provides a non-flame portion between a flame and a burner case.
It is intended to prevent deformation or the like due to overheating of the corner case.

[0006]

Means for Solving the Problems The present invention to achieve the above object, the flame port portion of the terminal end of the burner head and the imperforate portion
And the burner head has secondary air ports
The part is located .

[0007]

According to the present invention, when the premixed gas supplied from the vaporizer burns on the upper surface of the burner head through the mixing chamber, the end of the flame port is closed and the hole is non-porous. Does not form flames. Also burner head
Has secondary air ports at both ends, so
No flame is formed. Therefore, since the flame does not directly touch the burner case, overheating of the burner case can be suppressed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 to FIG. 3, reference numeral 21 denotes a carburetor, which has a built-in heater 22 and has a fin 2 on the upper side for receiving combustion heat.
1a is provided. Reference numeral 23 denotes a nozzle having a tip facing the carburetor 21, and the other end is connected to a fuel pump 24. 2
Reference numeral 5 denotes a carburetor cover, which is provided with a heat insulating layer on its inner surface to cover the carburetor 21 to suppress heat radiation. Reference numeral 26 denotes a burner head in which elongated flame openings 27 having a large number of fine holes on the upper surface and elongated secondary air openings 28 having a large number of small holes on the upper surface are alternately arranged. The mouth is arranged, and the outer periphery except for the connection with the vaporizer 21 is covered with a burner case 26a. The lower surface of the flame opening 27 is open, and a large number of fine holes 27a are formed in the upper surface.
The lower surface of the secondary air port 28 is closed, a number of small holes 28c are formed in the upper surface, and an opening 28b is provided on the side opposite to the connection with the vaporizer 21.

On the opposite side of the connecting portion of the burner head 26 with the carburetor 21, the secondary air port 28 is open to the end, but the flame port 27 is provided with a non-porous portion 27 a.

Reference numeral 29 denotes a mixing chamber, which forms a passage for conveying the premixed gas formed in the vaporizer 21 to the burner head 26. Reference numeral 30 denotes an igniter for igniting fuel, 31 denotes a blower for supplying air for combustion, 32 denotes a main body case which covers the carburetor 21, the burner head 26, the mixing chamber 29, and the like. The carburetor 21, the burner case 26a A passage 33 for supplying secondary air is formed between the first and second passages.

In the above configuration, when the heater 22 is energized and the vaporizer 2 reaches a predetermined temperature, the fuel pump 24 and the blower 31 are operated, and fuel is supplied from the fuel tank (not shown) to the tip of the nozzle 23 by the fuel pump 24. From vaporizer 21
The gas is vaporized by contacting the wall inside the heated vaporizer supplied and heated. The combustion air is supplied by a blower 31 and a part thereof is supplied into a vaporizer 21 and mixed with a vaporized gas to form a premixed gas, which is further mixed in a mixing chamber 29 while being opened at a lower surface of a flame opening 27 of a burner head 26. The gas is ejected from the fine holes 27a on the upper surface through the portion and is ignited by the igniter 30 to form a combustion flame. Other air passes through a passage 33 which is a gap between the case 23 and the carburetor cover 25 and a gap between the case 23 and the burner case 26a.
It reaches the side opposite to the connection with the first air inlet 1, flows in through the opening 28b of the secondary air part 28, and gushes out from the small hole 28c on the upper surface to promote combustion.

Here, the burner case 26a located above the flame is heated by the heat of the combustion flame formed on the upper surface of the flame hole portion 27 during combustion. With the longitudinal direction of the burner head 26 as the front-rear direction, the secondary air port 28a is disposed between the flame hole 27 and the burner case 26a at both ends, so that the air layer formed by the secondary air between the flame and the burner case 26a. , The heating on both sides of the burner case 26a is reduced. At the end of the burner head 26 opposite to the portion connected to the carburetor 21 (the rear end of the burner head 26), a non-porous portion 27a is provided in the flame hole 27 so that the flame is burned.
No longer touches the corner 26a. Further in this embodiment
Since the small hole of the secondary air port 28 of the burner head 26 is open to the terminal end, the secondary air flows into the upper part of the non-porous portion 27a as shown by the arrow, and the flame hole 27 is perforated. An air layer is interposed between the flame formed in the portion and the burner case 26a.
Therefore, the flame does not directly touch the burner case 26a, so that the burner case 26a can be prevented from being deformed due to overheating and corrosion due to oxidation, and the flame can be prevented from being burned.
Since it is not cooled by 6a, combustion is completed, and generation of CO or the like due to flame cooling can be prevented.

[0013]

As described above, according to the combustion apparatus of the present invention, the following effects can be obtained. (1) Since the non-porous portion is provided between the flame hole and the burner case, it is possible to prevent the burner case from being deformed due to overheating and corrosion due to oxidation. (2) Burner head alternates between flame outlet and secondary air outlet
The secondary air ports are located at both ends of the row
Burner while improving combustion performance by alternate arrangement
Since the case is not heated by the flame port,
Also protects the burner case from deformation due to overheating and corrosion due to oxidation.
Can be stopped. (3) When the secondary air port is provided up to the end of the burner head, it is possible to prevent the flame from being cooled by the burner case and to prevent the generation of CO and the like due to the flame cooling.

[Brief description of the drawings]

FIG. 1 is a plan sectional view of a main part of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view of a main part of the combustion apparatus.

FIG. 3 is an enlarged plan view of a main part of the combustion device.

FIG. 4 is a plan cross-sectional view of a main part of a conventional combustion device.

FIG. 5 is a front sectional view of a main part of the combustion apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Vaporizer 26 Burner head 26a Burner case 27 Flame port 27a Non-porous part of flame port 28 Secondary air port

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-11208 (JP, A) JP-A-3-217720 (JP, A) JP-A-3-75405 (JP, A) JP-A-3-315 221708 (JP, A) JP-A-1-302007 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23D 11/10 F23D 11/40

Claims (2)

(57) [Claims] 1. A burner head in which a flame port and a secondary air port are alternately arranged, a burner case covering an outer periphery of the burner head, and a vaporized gas which burns in the flame port of the burner head. A vaporizer, a mixing chamber that covers the lower surfaces of the vaporizer and the burner head and forms a gas passage from the vaporizer to the burner head, and a main body case that covers the vaporizer, the burner head, and the mixing chamber. The burner head has a non-porous end at the end thereof, and the burner head
Is a combustion device with secondary air ports located at both end rows . 2. The combustion device according to claim 1, wherein the secondary air port has a small hole opened to the terminal end thereof.