JP2897525B2 - Oil burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a safety device for an oil combustor used for hot water supply or heating equipment.

[0002]

2. Description of the Related Art In general, an oil combustor for vaporizing fuel will be described with reference to FIG. In FIG. 4, reference numeral 1 denotes a burner head, which is closed by a burner head case 2 having a U-shaped periphery and a vaporizer 3 having a U-shaped opening surface having a heater. Forming a burner. Reference numeral 4 denotes a vaporizer lid that is attached to the vaporizer 3 and seals a vaporized gas. A nozzle 5 having an opening and ejecting fuel to the carburetor 3 is provided above the carburetor lid 4. The nozzle 5 is fixed to a burner case 6 that covers the periphery of the burner head case 2. Then, the fuel sent from the oil supply electromagnetic pump 7 is jetted to the vaporizer 3 through the oil feed pipe 8. Reference numeral 9 denotes a blower for supplying combustion air, which is attached to the burner case 6. Reference numeral 10 denotes a mixing chamber for vaporizing gas and air, which serves as a passage for supplying the vaporizing gas in the vaporizer 3 to the burner head 1, and is mounted below the vaporizer 3 and the burner head 1. Reference numeral 11 denotes an overheating prevention device mounted on the lower surface of the burner case 6 on the inlet side.

[0003]

However, there are the following problems in the construction for mounting the overheating prevention device for the conventional vaporized petroleum combustor as described above. That is, in order to vaporize kerosene, the temperature control of the vaporizer 3 is set to about 230 ° C. during standby so that combustion can be started at any time. During combustion, the vaporizer is set at about 300 ° C. in order to improve vaporization. When the control of the vaporization temperature becomes abnormal during combustion and the temperature rises abnormally, or when the temperature of the mixing chamber 10 rises abnormally due to flashback during the combustion and may cause danger, it is placed under the burner case 6. The provided excessive temperature rise prevention device 11 works to avoid danger. However, due to variations in heat conduction due to the thickness of the material, variations in the mounting state, and variations due to the flow of air, the temperature detection of the excessive temperature rise prevention device 11 has many variations, and stable detection cannot be performed. For this reason, there has been a case where the overheating prevention device does not work even when the safety device malfunctions or there is a danger such as flashback.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to obtain a configuration in which a temperature is stably detected and an overheat prevention device is operated at a correctly set temperature as a safety device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, an oil combustor according to the present invention comprises a vaporizer having a burner head case, a heater for vaporizing oil in the burner head case, and a burner head case. A burner head provided at the bottom of the burner head case, two mixing chambers each having a cross section serving as a passage for supplying vaporized gas from the vaporizer to the burner head provided at the bottom surface of the burner head case, and a gap between the mixing chamber and the mixing chamber. A burner case having a combustion air passage,
A metal fitting which is located in a valley formed by two bowl-shaped portions of the mixing chamber through an opening provided in a burner case on the lower surface side of the vaporizer and is fixed to the vaporizer and closes the opening, and It is provided with the provided overheating prevention device.

[0006]

According to the above construction, the oil combustor of the present invention has a structure in which the mounting bracket for the excessive temperature rise prevention device is directly fixed to the vaporizer through the mixing chamber during standby while combustion is stopped and also during combustion. In addition to receiving the conductive heat directly and stably, the overheating prevention device mounting bracket receives the radiant heat from the mixing chamber as a whole, so that the overheating prevention device operates correctly at the set temperature.

[0007]

FIG. 1 shows an embodiment of an oil combustor according to the present invention.
This will be described with reference to FIG. In the figure, reference numeral 21 denotes a burner head, a burner head case 22 having a U-shape around the burner head,
This U-shaped opening surface is closed by a vaporizer 23 having a heater. Reference numeral 24 denotes a vaporizer lid which is attached to the vaporizer 23 and seals a vaporized gas.
A nozzle 25 having an opening and ejecting fuel to the carburetor 23 is provided above the nozzle. The nozzle 25 is fixed to a burner case 26 that covers the burner head case 22, and ejects oil sent from an oil supply electromagnetic pump 27 to a vaporizer 23 via an oil feed pipe 28. 2
Reference numeral 9 denotes a blower for supplying combustion air, which is attached to the burner case 26. Numeral 30 denotes a mixing chamber having a cross section serving as a passage for supplying the vaporized gas in the vaporizer 23 to the burner head 21 as shown in FIG.
Is provided at the lower part. Further, the burner case 26 has an opening 31 on the lower surface side of the vaporizer 23. Reference numeral 32 denotes a metal fitting 3 having a box bent at the opening 31 on the lower surface of the burner case 26.
2, the metal fitting 32 is directly fixed to the vaporizer 23 through the mixing chamber 30 at the valley between the two mixing chambers 30 having a bowl-shaped cross section, and the opening 31 of the burner case 26 is closed. 3
Reference numeral 3 denotes an excessive temperature rise prevention device mounted on the surface of the metal fitting 32 bent in a box.

In the above structure, when the temperature control of the vaporizer is abnormal and the temperature rises abnormally, the temperature of the mixing chamber 30 may abnormally rise due to flashback or the like during combustion, which may cause danger. . In this case, the over-temperature prevention device 33
The metal fitting 32 with the box bent is fixed directly to the vaporizer 23 through the mixing chamber 30 so that the conduction heat from the vaporizer 23 is stably received, and the radiant heat from the mixing chamber 30 is also reduced to the whole metal fitting 32. Receiving the stable heat supply makes it possible to eliminate fluctuations in heat conduction due to fluctuations in heat conduction, fluctuations due to air flow in the airframe, and the like, thereby enabling stable temperature detection. Therefore, a malfunction of the over-temperature rise prevention device 33 does not occur.

In the embodiment of the present invention, the metal fitting 32 to which the overheating prevention device 33 is attached can be made of a metal sheet having extremely good heat conductivity, such as a copper sheet or an aluminum sheet, or a metal sheet having a little heat conductivity. The heat conduction from the vaporizer 23 can be controlled.

[0010]

As described above, according to the present invention, the mounting bracket for the overheat prevention device is directly fixed to the vaporizer through the mixing chamber.
By receiving the radiant heat from the mixing chamber as a whole, the temperature can be stably detected by the whole metal fittings. Therefore, the over-temperature prevention device operates reliably without malfunction, so that the safety of the oil combustor becomes more reliable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a combustion section of an oil combustor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a fitting mounting portion in the embodiment.

FIG. 3 is a perspective view of a box-bent bracket in the embodiment.

FIG. 4 is a sectional view of a combustion part of a conventional oil combustor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Burner head 22 Burner head case 23 Vaporizer 26 Burner case 30 Mixing chamber 31 Opening 32 Metal fitting 33 Overheat prevention device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23D 11/10 F23D 11/40 F23D 11/44 F23N 5/02 342

Claims (1)

(57) [Claims] 1. A burner head case, a vaporizer having a heater for vaporizing oil in the burner head case, a burner head provided in the burner head case, and a bottom surface of the burner head case. Two mixing chambers each having a cross section serving as a passage for supplying vaporized gas from the vaporizer to the burner head, a burner case having a gap with the mixing chamber and serving as a combustion air passage, and the vaporizer. A metal fitting that is fixed to the vaporizer and closes the opening at a valley formed by the two bowl-shaped portions of the mixing chamber through an opening provided in the burner case on the lower surface side of the burner case; Oil combustor consisting of an overheat prevention device.