JPH0271005A - Burner for liquid fuel - Google Patents

Abstract

PURPOSE:To make it possible to shorten the time required for transferring fire and prevent the discharging of vaporization gas by providing between flame hole plates a fire transfer section which has little influence of secondary air and providing flame hole plates for fire transfer which are opposite to each other through the fire transfer section. CONSTITUTION:When a heater 22 is electrically energized and the temperature of a carburetor 21 is above a specified value, kerosene is supplied to a cone member 26 through an oil delivery pipe 30 and the oil is vaporized by the carburetor 21. The vaporization gas is jetted out from a vaporized gas outlet 23 by the air for vaporization that is sent from a blower 35 and the jetted gas flows into a mixing chamber 39 from the inlet 42 of the mixing chamber with primary gas accompanying which flows in from a primary flow straightening hole 40 to a distant section 41. The primary air and vaporization gas are mixed in the mixing chamber 39 to become premixing gas, and it is jetted out from a flame hole plate 45 and at the same time it is jetted out also to a fire transfer section 51 from a fire transfer plate 52. When the flame hole of the flame hole plate 45 near an ignition plug 53 is ignited by the plug 53, the flame moves to other flame holes in the flame hole plate 45 and at the same time the flame moves instantaneously to the other flame holes on the flame hole plate 45 through the fire transfer section 51.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fuel vaporization type liquid fuel combustion device.

2. Description of the Related Art As shown in FIG. 4, a conventional liquid fuel combustion apparatus of this type includes a cooling prevention wall 2 provided above a vaporizer 1 in which liquid fuel is vaporized, and a lower end of this cooling prevention wall 2. A primary rectifying hole 4 that communicates with the air blowing path 3 is opened at the top. The mixing chamber 5 is arranged with a predetermined gap from the inner surface of the cooling prevention wall 2, and the vaporizer 1 and the mixing chamber 5 are connected to the vaporized gas which is opened at the upper part of the vaporizer 1 through the cooling prevention wall 2. The outlet 6 communicates with the mixing chamber 5 via a large mixing volume lower provided at the bottom thereof. A mixing chamber lid 8 is provided on the top surface of the mixing chamber 5, and a plurality of rows of mixing tubes 9 extending upward from the mixing chamber 5 are provided on the mixing chamber lid 8 at predetermined intervals. hole plate 1
It communicates with No. 2 flame hole IO. A plurality of rows of secondary air holes 11 are formed between the flame holes 10 of the flame hole plate 12, and communicate with a secondary air passage 16 which communicates with the air blowing path 3. Further, a spark plug 13 is provided near a predetermined flame hole 10. 14 is an outer box provided with a blower 15 at the bottom.

In the above configuration, the vaporized gas generated in the vaporizer I is ejected from the vaporized gas outlet 6 and flows into the primary rectifying hole 4 from the vaporized gas outlet 6.
The mixed air flows into the mixing chamber 5 from the large mixing volume lower with the secondary air.

This primary air and vaporized gas are mixed in the mixing chamber 5 to form a premixed gas, which passes through the mixing tube 9 and is ejected from the flame hole 10.
It is ignited by the spark plug 13 and burns. At this time, the secondary air sent from the blower 15 and ejected from the secondary air holes 11 promotes the combustion.

Problems to be Solved by the Invention However, in this type of liquid fuel combustion device, the ignition plug 1
3, the premixture ignites and forms a flame, but the premixture and secondary air are ejected from the upper surface of the flame hole plate 12 in parallel, and a jet of secondary air exists between the premixtures. Therefore, there was a problem in that it took time for the flame to transfer, and the vaporized gas was discharged to the outside without being combusted until all the premixture was ignited.

SUMMARY OF THE INVENTION The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a liquid fuel combustion device that can shorten the flame transfer time and prevent unburned vaporized gas from being discharged to the outside.

Means for Solving the Problems In order to solve the above problems, the liquid fuel combustion device of the present invention has a mixing chamber communicating with a vaporizer, and a large number of flame holes communicating with this mixing chamber, which are arranged at appropriate intervals. a secondary air plate having a plurality of secondary air holes communicating with the secondary air passages and disposed on the same plane between the flame hole plates; A flame transfer flame hole plate having a concave flame transfer part interposed in a part of the air plate and a large number of flame holes provided so as to communicate with the mixing chamber on both sides of each flame transfer part. It is equipped with the following.

Effect With the above configuration, the premixture in the mixing chamber is ejected from the flame holes of the flame port plate and is also ejected from the flame transfer port plate to the fire transfer portion. Therefore, when a part of the flame hole is ignited, the flame spreads to other flame holes on the same flame hole plate, and the influence of secondary air is small, and the flame transfer flame hole plates face each other. Fire instantly transfers to the flame holes of other flame hole plates via the flame transfer portion. As a result, the heat transfer time is shortened compared to the conventional method.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a front perspective view of a liquid fuel combustion device showing one embodiment of the present invention, and FIG. 2 is a side sectional view of the same liquid fuel combustion device. In FIGS. 1 and 2, 21 is a heater 22.
This vaporizer 21 has a vaporized gas outlet 23 in the upper part, and a vaporizing air outlet 24 in the lower part.
is provided. A conical cutting plate 25 and an inverted conical cone member 26 are provided inside the vaporizer 21 through which the vaporizing air mass 24 is passed. The swinging plate 25 and the cone member 26 are fixed to a motor shaft 28 and driven by a motor 27. An oil supply pipe 30 is placed close to the surface of the cone member 26 with a gap therebetween, and fuel oil is supplied by an oil supply pump 29 . A vaporizing air chamber 31 is provided around the motor 27, and a vaporizing air intake port 32 is provided on the lower surface.

Further, a carburetor cover 34 is provided around the carburetor 21 via a heat insulating side 33. Around the vaporizer cover 34 and the vaporizing air chamber 31, an air passage 36 is provided which communicates with an air blower 35 provided at the bottom of the outer box 38. A rectangular cylindrical cooling prevention wall 37 through which the vaporized gas outlet 23 passes is attached to the upper end of the vaporizer 21 via the carburetor cover 34. A prismatic cylindrical mixing chamber 39 is provided. A plurality of primary rectification holes 40 are formed in the lower end surface of the cooling prevention wall 37 , and the air passage 315 and the gap 41 communicate with each other through the primary rectification holes 40 . A mixing chamber 42 is formed in the lower chamber, which communicates with the vaporized gas outlet 23 via a space 41. A plate-shaped control board 43 is provided in the mixing chamber 39 at a position facing the mixing chamber 42, and a kerosene tank (not shown) is provided at the bottom of the mixing chamber 39.
A return pipe 44 communicating with is provided. On the upper surface of the mixing chamber 39, as shown in FIG. It is connected to 39. Further, a secondary air plate 47 having a large number of secondary air holes 50 formed in a row is disposed on the same side of the flame hole plate 45, and these secondary air holes 50 are connected to secondary passages provided below. This secondary passage pipe 46 communicates with the air passage 36.
It communicates with a secondary air passage 49 through a secondary air baffle plate 48 . Further, each of the secondary air plates 47 is provided with a recessed fire transfer portion 51 interposed at the same position, and this fire transfer portion 51 is not provided with a secondary air hole 50.

A flame transfer flame hole plate 52 having a large number of flame holes communicating with the mixing chamber 39 on the bottom 316 side of the flame hole of the flame hole plate 45 is located on both sides of the flame hole plate 45 side of the flame transfer portion 51. Flame hole plate 45
They are formed of punched plates in the same way as the above, and are opposed to each other.

Ignition plugs 53 are provided above the flame hole plate 45 at appropriate locations.

In the upper Nt state, the heater 22 is energized and the vaporizer 2 is turned on.
1, when the temperature reaches a certain value or higher, the oil supply pump 29 is activated, kerosene is supplied to the cone member 26 through the oil supply pipe 3o, and the kerosene is atomized by the simultaneous rotation of the cutting plate 25 and vaporized in the vaporizer 21. It is scattered on the surface and vaporized.

The generated vaporized gas is ejected from the vaporized gas outlet 23 by the vaporized air sent from the blower 35 and passed through the vaporizing air intake 24 and the vaporizing air intake 32, and flows into the spacer 41 from the primary rectification hole 40. The primary air flows from the mixing chamber 42 into the mixing chamber 39 together with the primary air. This primary air and vaporized gas are mixed in the mixing chamber 39 to form a premixed gas,
It is ejected from the flame port plate 45 and also ejected from the flame transfer port plate 52 to the fire transfer portion 51 .

Therefore, when a flame hole in the flame hole plate 45 in the vicinity is ignited by the spark plug 53, the flame spreads to other flame holes in the flame hole plate 45, and the flame transfers with less influence of secondary air. The flame may also transfer to the flame holes of other flame hole plates 45 via the portion 51 in case of a slight fire. For this reason, the flame transfer time is shorter than that of the conventional type, and as a result, unburned vaporized gas is prevented from being discharged to the outside. In addition, since the prepared aiki and the secondary air are ejected in parallel and at alternate positions, even after the flame spreads to all the flame hole plates 45, the combustion noise of the flame is suppressed to a small level, and the secondary air Combustion is efficiently promoted.

Effects of the Invention As described above, according to the liquid fuel combustion device of the present invention, a flame transfer part that is less affected by secondary air is provided between the flame port plates, and the flame transfer flame hole plates facing each other are arranged through the flame transfer part. This has the effect of reducing the time required for the flame to transfer compared to the conventional method and preventing the emission of vaporized gas.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a liquid fuel combustion device showing an embodiment of the present invention, FIG. 2 is a side sectional view of the liquid fuel combustion device,
FIG. 3 is an enlarged perspective view of the main part of the liquid fuel combustion apparatus, and FIG. 4 is a sectional view of the main part of the conventional liquid fuel combustion apparatus. 21... Vaporizer, 39... Mixing chamber, 45... Flame hole plate, 47... Secondary nitrogen plate, 50... Secondary air hole, 5
1... Flame transfer part, 52... Fire transfer flame hole plate.

Claims (1)

[Claims] 1. A mixing chamber communicating with the vaporizer, a flame hole plate having a large number of flame holes communicating with this mixing chamber and arranged at appropriate intervals, and a large number of secondary air communicating with the secondary air passages. has a hole,
A secondary air plate disposed between the flame hole plates and on the same plane, a concave fire transfer part provided in a part of each secondary air plate, and both sides of each fire transfer part. and a flame transfer flame hole plate having a large number of flame holes, which is provided to communicate with the mixing chamber.