JPH03221706A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To make the construction of a mixing chamber simple and compact and reduce the wetting of the inner wall face with condensation dews by constituting a liquid fuel burner of a vaporizer, inlet of vaporization air, outlet of the vaporizer, mixing chamber, mixture gas inlet, and flame hole and at the same time forming the outlet of the vaporizer in a plurality of nozzle shapes. CONSTITUTION:Fuel is supplied to a rotor 20 through a fuel supply tube 23, and the fuel ascends along the conical side face of the rotor 20 that rotates through a motor shaft 21 by the rotation of a motor 22 and it is atomized by a swinging plate 19 and flies off from it. The atomized fuel is vaporized by the side wall that is heated by the heater 16 of a vaporizer 15. This vaporization gas 43 is carried out from a vaprizer outlet 17 by the flowing-in from the vaporization air inlet 18 of the vaporizer 15 of vaporization air that flows into a vaporization air chamber 25 through an air intake inlet 26 for vaporization from an air channel 30. Here, the vaporizer outlet 17 is divided into a plural number of portions and nozzle-shaped and the vaporization gas 43 jetted out of the outlet 17 has a high speed. lt mixes, therefore, with the air 41 for transportation that is primary air for combustion by a large contact plane and at the same time the ejector action of the jet flow itself promotes mixing and the carrier air 41 flows into a mixing chamber 32.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vaporizing liquid fuel combustion device.

2. Description of the Related Art Conventionally, in this type of vaporized liquid fuel combustion apparatus, as shown in FIG. The shaft of a motor 7 that rotates the dividing plate 6 inside the carburetor l is arranged to pass through the side wall 8 of the primary air passage 3. It is surrounded by a folding box 10 having a communication hole 9 to 3.

A flame hole plate 11 is provided at the upper part of the mixing tube 4 to form a combustion section, and a blower 12 for combustion air is provided at the other end of the primary air passage 3, and a blower 12 is provided at the other end of the primary air passage 3 to direct air to the vicinity of the shaker plate 6. is configured such that a refueling pipe 14 for supplying liquid fuel by a pump 13 is disposed, and a refueling pipe 14 is provided by the pump 13.
The fuel supplied to the shaker plate 6 through the motor 7 is atomized by the rotation of the motor 7, and is scattered on the vaporization surface of the carburetor 1, where it is vaporized.The generated vaporized gas is passed through the primary air passage 3. The combustion air enters the mixing tube 4 through the inlet 5 together with the combustion primary air sent from the blower 12, forms a mixture, blows out from the flame hole plate 11, and burns.

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

Problems to be Solved by the Invention However, in such a configuration, the vaporized gas carried out from the carburetor 1 is surrounded by the primary combustion air supplied from the primary air passage 3, and then passes through the inlet 5 of the mixing pipe 4. Since the gases flow into the gas, it becomes difficult to mix the mixture, which requires the structure of the mixing tube to be complicated and large, and the condensation of the vaporized gas on the inner wall surface increases.

The present invention solves such conventional problems, and aims to make the structure of the mixing chamber simple and compact, and to significantly reduce condensation on the inner wall surface.

Means for Solving the Problems In order to solve the above problems, the liquid fuel combustion apparatus of the present invention includes a vaporizer, a vaporization air inlet provided at the bottom of the vaporizer, and a vaporization air inlet provided at the top of the vaporizer. a mixing chamber isolated from the vaporizer via a conveying air passage above the vaporizer, a hawk aiki inlet provided at the bottom of the mixing chamber and facing the vaporizer outlet, and an upper part of the mixing chamber. The carburetor outlet has a plurality of nozzle shapes.

Effect of the present invention With the above-described configuration, the vaporized gas ejected from the plurality of nozzle-shaped carburetor outlets mixes with the conveying air, which is the primary air for combustion, supplied from the conveying air passage on a wide contact surface, In addition, since the ejector action of the jet flow promotes mixing while flowing into the mixing chamber, sufficient mixing is possible with a simple and compact mixing chamber.

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

In FIG. 1, reference numeral 15 denotes a vaporizer with a built-in heater 16. At the top of this vaporizer 15, a vaporizer outlet 17 having a plurality of nozzle shapes is provided, and at the bottom thereof, a vaporizing air inlet]8 is provided. This vaporizing air inlet 18
A swinging plate 19 using a flat disc and a conical rotor 20 are provided in the carburetor 15 via the carburetor 15. Shaking board 2
2 and the rotor 20 are connected to a motor shaft 21 and a motor 22. One end of a fuel supply pipe 23 is connected with a gap below the side surface of the rotor 20, and the other end is connected to a fuel supply pump 24.
It is connected to the. A vaporizing air chamber 25 is provided around the motor 22, and a vaporizing air intake port 26 is provided in a part of the chamber. Additionally, a heat insulating material 27 is provided around the carburetor 15.
A carburetor cover 28 is provided via. Insulation material 2
7 and the carburetor cover 28 are provided with a carburetor outlet 17 and a vaporizing air port 18 penetrating therethrough. An air passage 30 communicating with the blower 29 is provided around the vaporizer cover 28 and the vaporizing air chamber 25. A mixture isolated from the vaporizer 15 via a conveying air passage 31 that is provided with a gap above the vaporizer outlet 17 of the vaporizer 15 and the surrounding vaporizer cover 28 and communicated with the air passage 30. Room 3
2 are provided. A mixture inlet 33 is provided at the bottom of the mixing chamber 32 at a position opposite to the carburetor outlet 17 of the carburetor 15 . A plate-shaped mixing plate 34 is provided in the mixing chamber 32 above the air-fuel mixture inlet 33 . A flame hole 36 divided by a plurality of secondary air jetting passages 35 is provided in the upper part of the mixing chamber 32 . The secondary air jetting passage 35 is provided in a configuration that does not communicate with the mixing chamber 32, and is configured not to communicate with the mixing chamber 32.
2, the air passage 30 and the conveying air passage 3
It is in communication with a secondary air passage 37 which communicates with 1. A plurality of secondary air jet holes 3 are provided at the upper part of the secondary air jet passage 35.
8 is provided.

39 is a combustion flame, 40 is vaporizing air, 41 is conveying air, 42 is secondary air, and 43 is vaporizing 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, and rises along the conical side surface of the rotor 20 rotating via the motor shaft 21 due to the rotation of the motor 22. Then, it is atomized and scattered from the shaker plate 19, and is vaporized on the side wall heated by the heater 16 of the vaporizer 15. This vaporized gas 43 is generated by the vaporizing air 40 that has flowed into the vaporizing air chamber 25 from the air passage 30 through the vaporizing air intake 26 and from the vaporizing air inlet 18 of the vaporizer 15. 1
Carried out from 7. Most of the air rises through the air passage 30 from the blower 29 and is divided into conveying air 41 and secondary air 42. Conveying air 41 is passed from the conveying air passage 31 to the air-fuel mixture inlet 33 of the mixing chamber 32 to the carburetor outlet 1 of the carburetor 15.
The mixture of the conveying air 41 and the vaporized gas 43 is promoted by the mixing plate 34, rises in the mixing chamber 32, reaches the flame hole 36, and is connected to an igniter (not shown). ignites and burns. On the other hand, the secondary air 42 rises around the mixing chamber 32 , flows into the secondary air jetting passage 35 from the secondary air passage 37 , is jetted out from the secondary air jetting hole 38 , and forms combustion in the flame hole 36 . It envelops the flame 39, shortens the flame length, and promotes high-load combustion.

Here, since the vaporized gas 43 ejected from the carburetor outlet 17 is divided into a plurality of parts and the outlet shape is a nozzle, the ejection speed is high. It mixes with the conveying air 41, which is the primary air of It can be made possible.

Effects of the Invention As described above, the liquid fuel combustion apparatus of the present invention includes a vaporizer, a vaporizing air inlet provided at the bottom of the vaporizer,
A vaporizer outlet provided at the top of the vaporizer, a mixing chamber isolated from the vaporizer via a conveying air passage above the vaporizer, and a mixing chamber provided at the bottom of the mixing chamber facing the air-fuel mixture outlet. It consists of an air-fuel mixture inlet and a flame hole provided in the upper part of the mixing chamber, and the vaporizer outlet has a plurality of nozzle shapes, so that the vaporized gas and the conveying air which is the primary air for combustion are mixed. Not only can the mixing chamber be made simple and compact, but also the mixing chamber can be made simple and compact, making it very easy to mix with the vaporized gas in the mixing chamber. Wetting of the inner wall surface due to air condensation can also be reduced, which has the great effect of reducing the apparent amount of combustion during ignition and greatly reducing white smoke and odor during extinguishing.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part of a combustion device according to an embodiment of the present invention, and Fig. 2 is a partial sectional view of a conventional combustion device.
・Carburetor, 17... Carburizer outlet, air inlet,
31... Conveyance air passage, chamber, 33...
・Mixture inlet, 36...flame hole.

Claims (1)

[Claims] a vaporizer, a vaporizing air inlet provided at the bottom of the vaporizer, and a vaporizer outlet provided at the top of the vaporizer;
A mixing chamber isolated from the vaporizer above the vaporizer via a conveying air passage; a mixture inlet provided at the bottom of the mixing chamber and facing the vaporizer outlet; What is claimed is: 1. A liquid fuel combustion device comprising a flame hole provided at an upper part, and the vaporizer outlet having a plurality of nozzle shapes.