JPS599136Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a forced premix type liquid fuel combustion device that mixes liquid fuel such as kerosene with air, vaporizes it, and burns it. The aim is to increase thermal efficiency and achieve rapid ignition.

Conventional combustion devices of this type heat the vaporizing surface of the inner wall around the vaporizing chamber with an electric heater, and adjust the temperature using a temperature controller, etc. to 200 to 250°C, which is a temperature suitable for vaporizing liquid fuels such as kerosene. I was trying to do it.

Conventional combustion engines have disadvantages such as a large amount of electric power required for shortening the ignition time and keeping the vaporization surface warm during non-combustion, and a large amount of heat loss due to heat dissipation from the outer periphery of the combustor.

This invention eliminates these drawbacks and will be explained below based on the illustrated embodiments.

A combustor 1 is composed of a combustor body 2, a partition plate 3, a burner head 4, a heating element 5, and the like.

6 is a rod-shaped heating projection with a heating element 5 buried vertically in the center of the combustor body 2; 7 is a spiral vaporization wall provided around the heating projection 6 for thermal conduction; 8 is this vaporization wall 7. 9 is a spirally shaped vaporization chamber between the vaporization wall 7 and the vaporization tube 8; 10 is a side wall of the vaporization tube 8 forming the vaporization chamber 9; An orifice-shaped primary air intake port 11 opened downward is a mixing chamber formed above the partition plate 3.

Reference numeral 12 is a through hole provided in the partition plate 3, which communicates the lower vaporization chamber 9 with the upper mixing chamber 11.

13 is a flame port provided in a sawtooth shape on the outer periphery of the burner head 4;
By arranging the burner head 4 above the partition plate 3, the mixing chamber 11 and the upper part of the combustor main body 2 are communicated with each other.

Reference numeral 14 designates a protrusion provided on the combustor main body 2 near the bottom of the heating projection 6 as a temperature detection unit, and 15 indicates a temperature regulator attached to the protrusion 14 with screws or the like.

16 is an oil level regulator, 17 is a fuel supply pipe, 18 is a blower, 1
9 is a fuel tank, 20 is an air pipe, 21 is a pressurizing pipe, and 22 is a connecting pipe that connects the oil level regulator 16 and the fuel tank 19.

Reference numeral 23 denotes a case that covers the outer periphery of the combustor 1, and has an air pressure adjustment space 24 between it and the outer surface of the combustor main body 2 that is airtight to the outside air.
is taking shape.

A blower pipe 20, a pressurizing pipe 21, and a fuel supply pipe 17 are each airtightly attached to the case 23, and the tip of the fuel supply pipe 17 communicates with the primary air intake port 10.

25 is a discharge plug for ignition, and 26 is a plurality of secondary air intake ports provided on the upper outer periphery of the combustor main body 2, which communicate the space 24 with the outside air above the combustor main body 2.

Reference numeral 27 denotes a lid provided above the secondary air intake port 26, and is installed so that a slit 28 for allowing secondary air to flow out in the radial direction is formed between the lid and the upper surface of the combustor main body 2.

That is, the air pressure adjustment space 24 is configured to cause secondary air to flow out toward the center above the burner head 4 via the secondary air intake port 26.

Reference numeral 29 indicates a plurality of secondary air intake ports provided around the heating element 5 of the heating protrusion 6 in order to control the secondary air in the center flowing in from the air pressure adjustment space 24; It is a lid that allows air to escape.

In the configuration described above, when the blower 18 is operated, the air blown by the blower pipe 20 enters the air pressure adjustment space 24 as indicated by the dotted line arrow, and the static pressure of the air flows through the pressure pipe 21 to the constant oil pressure. It acts on the oil level of the mask 16.

As a result, the fuel is pushed out through the fuel supply pipe 17 to the lower part of the vaporization chamber 9, and is blown away by the surrounding high-speed air flow caused by the air intake port 10, becoming atomized, and buried in the heating protrusion 6. It collides with the spiral vaporization wall 7 in the gas chamber 9 heated by the heating element 5, and is heated and vaporized by the swirling airflow as shown by the solid line arrow, reaching the flame port 13, and the discharge plug 25
It is ignited by the blue flame 31.

This blue flame is caused by the air in the space 24 formed on the inner surface of the case 23 covering the combustor body 2 flowing through the secondary air intake 26 as shown by the dotted arrow. 29 to the blue flame-shaped combustion chamber for further complete combustion.

Therefore, according to this invention, a heating protrusion is provided in the center of the combustor, and a vaporization chamber having a spiral vaporization wall connected thermally to the periphery of the protrusion is formed. The large surface area eliminates unnecessary heating of the combustor body during ignition and heat retention, and the heat from the heating element can be used effectively.

In addition, since the combustor body is surrounded by a vaporization chamber, there is less heat dissipation from the outer periphery, which has the advantage of reducing heat loss during ignition and heat retention, saving power consumption and shortening ignition time. ing.

[Brief explanation of drawings]

The figure is a sectional view showing an embodiment of this invention. In the figure, 1 is the combustor, 2 is the combustor main body, 5 is the heating element, 6 is the heating projection, 7 is the vaporization wall, 8 is the vaporization cylinder, 9 is the vaporization chamber, 10 is the primary air intake port, and 24 is the vaporization wall. Air pressure adjustment space, 26.
29 is a secondary air intake port.

Claims (1)

[Scope of utility model registration request] A combustor body is provided with a heating protrusion in which a straight tube-shaped heating element is buried, and a vaporization chamber is provided around the heating protrusion, and a case that covers the outer periphery of the combustor body adjusts the air pressure between the combustor body and the combustor body. A fuel supply pipe and an air supply pipe are installed in this air pressure adjustment space, and a primary air intake port that communicates with the vaporization chamber and a plurality of secondary air intake ports that communicate with the combustion section above the vaporization chamber are installed. A liquid fuel characterized in that an air intake port is opened to the air pressure adjustment space, and at least one of the secondary air intake ports is opened to the heating protrusion so that the air passes through the heating protrusion. Combustion device.