JP2797588B2 - Liquid fuel combustion device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vaporized liquid fuel combustion device.

2. Description of the Related Art Conventionally, as shown in FIG. 2, a rotary type carburetor 1 comprises a vaporizing barb main body 2 as shown in FIG.
The primary air passage 3 and the inlet 5 of the mixing pipe 4
The shaft of a motor 7 for rotating the shaking plate 6 inside the carburetor 1 is disposed through the side wall 8 of the primary air passage 3, and the motor 7 is connected to the primary air passage 3. Are enclosed by a double box 10 having a communication hole 9 to the inside.

A flame hole plate 11 is provided at an upper portion of the mixing pipe 4 to form a combustion section. A blower 12 for combustion air is provided at the other end of the primary air passage 3 to a position near the shaking plate 6. Is configured such that an oil supply pipe 14 for supplying liquid fuel by a pump 13 is provided. The fuel supplied to the shake-off plate 6 via the oil supply pipe 14 by the pump 13 is miniaturized by the rotation of the motor 7. Then, it is scattered on the vaporizing surface of the vaporizer 1 and vaporized. The generated vaporized gas is supplied to the inlet 5 of the mixing pipe 4 together with the combustion primary air sent from the blower 12 through the primary air passage 3.
From the air hole plate 11 and burn.

In order to prevent the vaporized gas from leaking from the shaft penetrating portions of the motor 7 and the side wall 8, air is pushed into the outer case 10 from the air passage 3 with one through the communication hole 9.

However, in such a configuration, the vaporized gas carried out of the vaporizer 1 is wrapped by the primary combustion air supplied from the primary air passage 3 so that the inlet 5 of the mixing pipe 4 is closed. Therefore, there is a problem that the mixing becomes difficult and the structure of the mixing pipe must be complicated and large, and that the dew condensation of the vaporized gas on the inner wall surface also increases.

An object of the present invention is to solve such a conventional problem, and it is an object of the present invention to make the structure of the mixing chamber simple and compact, and to greatly reduce the dew condensation on the inner wall surface.

Means for Solving the Problems In order to solve the above problems, the liquid fuel combustion device of the present invention comprises a vaporizer, a vaporizing air inlet provided at a bottom of the vaporizer, and a vaporizer provided at an upper portion of the vaporizer. A mixing chamber separated from the vaporizer via a conveying air passage above the vaporizer, a mixture inlet provided at the bottom of the mixing chamber and facing the vaporizer outlet, and an upper part of the mixing chamber. And a plurality of nozzles at the vaporizer outlet.

According to the present invention, the vaporized gas ejected from a plurality of nozzle-shaped vaporizer outlets is mixed with the carrier air, which is the primary air for combustion supplied from the carrier air passage, at a wide contact surface, In addition, since the mixture flows into the mixing chamber while promoting the mixing by the ejector action by the jet flow, the mixing can be sufficiently performed with a simple configuration and a compact mixing chamber.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 15 denotes a vaporizer having a built-in heater 16.
A vaporizer outlet 17 having the shape of a plurality of nozzles is provided above the vaporizer 15, and a vaporizing air inlet 18 is provided below the vaporizer outlet 17. A shaking plate 19 using a flat disk and a conical rotor 20 are provided in the vaporizer 15 via the vaporizing air inlet 18. Shaking plate 22 and rotor 20
Is connected to the motor shaft 21 and the motor 22. One end of the fuel supply pipe 23 is connected to the lower side of the rotor 20 with a gap, and the other end is connected to the fuel supply pump 24. motor
A vaporizing air chamber 25 is provided around 22, and a vaporizing air intake 26 is provided in a part thereof. Further, a vaporizer cover 28 is provided around the vaporizer 15 with a heat insulating material 27 interposed therebetween. The heat insulator 27 and the vaporizer cover 28 are provided with a vaporizer outlet 17 and a vaporizing air inlet 18 penetrating therethrough. An air passage 30 communicating from the blower 29 is provided around the vaporizer cover 28 and the vaporizing air chamber 25. A transfer air passage 31 provided with a gap above the carburetor outlet 17 of the carburetor 15 and the carburetor cover 28 around the carburetor outlet 17 and communicated with the air passage 30.
A mixing chamber 32 is provided, which is isolated from the vaporizer 15 through the mixing chamber 32.
A mixed gas inlet 33 is provided at the bottom of the mixing chamber 32 at a position facing the vaporizer outlet 17 of the vaporizer 15. In the mixing chamber 32, a plate-shaped mixing plate 34 is provided above the mixed gas inlet 33. In the upper part of the mixing chamber 32, a plurality of secondary air ejection passages
A flame hole 36 divided by 35 is provided. The secondary air ejection passage 35 is provided so as not to communicate with the mixing chamber 32, is provided around the mixing chamber 32, and communicates with a secondary air passage 37 which communicates with the air passage 30 and the transfer air passage 31. .
In the upper part of the secondary air ejection passage 35, a plurality of secondary air ejection holes are provided.
38 are provided. 39 is combustion flame, 40 is vaporization air,
Reference numeral 41 denotes conveying air, 42 denotes secondary air, and 43 denotes vaporized gas.

In the above configuration, fuel is supplied to the rotor 20 through the fuel supply pipe 23 by the operation of the combustion supply pump 24,
By the rotation of 22, the rotor 20 rises along the conical side surface of the rotor 20 rotating through the motor shaft 21, is atomized and scattered from the shaking plate 19, and is heated at the side wall heated by the heater 16 of the vaporizer 15. Vaporized. The vaporized gas 43 flows into the vaporizing air chamber 25 from the air passage 30 through the vaporizing air inlet 26 through the vaporizing air inlet 26, and flows into the vaporizing air inlet 18 of the vaporizer 15. Carried out from 17. Most of the air rises in the air passage 30 from the blower 29 and is divided into the conveying air 41 and the secondary air 42. The transfer air 41 is connected to the transfer air passage 31.
From the mixture inlet 32 of the mixing chamber 32 to the vaporizer outlet 17 of the vaporizer 15
Flows along with the vaporized gas 43 carried out from the
As a result, the mixing of the carrier air 41 and the vaporized gas 43 is promoted, and the mixture rises in the mixing chamber 32 to reach the flame hole 36, where the igniter (not shown)
It is ignited by and burns. On the other hand, the secondary air 42 rises around the mixing chamber 32, flows into the secondary air ejection passage 35 from the secondary air passage 37, is ejected from the secondary air ejection hole 38, and
Wraps the combustion flame 39 that forms in the flame, shortens the flame length,
Promotes high load combustion.

Here, the vaporized gas ejected from the vaporizer outlet 17
43 is divided into a plurality and the outlet shape is a nozzle, so the ejection speed is high, so the transfer air passage
Conveying air 41 which is the primary air for combustion supplied from 31
And the mixture flows into the mixing chamber 32 while promoting the mixing by the ejector action from the jet flow, so that sufficient mixing can be achieved with a simple and compact configuration.

Effects of the Invention As described above, according to the liquid fuel combustion device of the present invention,
A vaporizer, a vaporizing air inlet provided at the bottom of the vaporizer, a vaporizer outlet provided at the top of the vaporizer, and a vaporizer separated from the vaporizer via a conveying air passage above the vaporizer. A mixing chamber, provided at the bottom of the mixing chamber, comprising a gas mixture inlet facing the gas mixture outlet, and a flame hole provided at the top of the mixing chamber, and the vaporizer outlet was formed into a plurality of nozzle shapes. Therefore, it becomes very easy to mix the vaporized gas with the carrier air, which is the primary air for combustion, so that not only can the mixing chamber have a simple and compact configuration, but also the configuration of the mixing chamber can be reduced. Because it can be made simple and compact, wetting of the inner wall surface due to condensation of the gaseous mixture with the vaporized gas in the mixing chamber can be reduced, so that the apparent decrease in combustion amount at the time of ignition, white smoke and odor at the time of digestion are also reduced. Big that can be greatly reduced With the results.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a partial sectional view of a conventional combustion apparatus. 15: Vaporizer, 17: Vaporizer outlet, 18: Vaporizing air inlet, 31: Conveying air passage, 32: Mixing chamber, 33: Mixture air inlet, 36: Flame hole.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Adachi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-305211 (JP, A) (58) Investigated Field (Int.Cl. ⁶ , DB name) F23D 11/04-11/08 F23D 11/10 F23D 11/40 F23D 11/44

Claims (1)

(57) [Claims] 1. A vaporizer, a vaporizing air inlet provided at a bottom portion of the vaporizer, a vaporizer outlet provided at an upper portion of the vaporizer, and a conveying air passage above the vaporizer. A mixing chamber separated from the vaporizer, a gas mixture inlet provided at the bottom of the mixing chamber and facing the vaporizer outlet, and a flame hole provided at the top of the mixing chamber, A liquid fuel combustion device having a vaporizer outlet having a plurality of nozzles.