JPS60207817A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To obtain the titled burner which is efficient, comfortable, excellent in convenience for use and suitable for room heating by providing a flow quantity adjustor for adjusting the flow quantity of gas within an exhaust gas passage and utilizing a member of forming an exhaust gas passage as a radiant body. CONSTITUTION:After a wick 7 is ignited, air passes from an air intake port 4 through air passages 5 and 10 by a drafting force generated by combustion, and is fed into a primary combustion chamber 21 through primary air supply ports 8a and 9a, and into a secondary combustion chamber 15 through secondary air supply ports 11 and 12, thereby being employed for the primary combustion and the secondary combustion. The adjustment of the combustion quantity is achieved by operating a flow quantity adjustor 19 to vary the drafting force and to adjust the quantity of air to be supplied. In the radiant body forming an exhaust passage 22 are mounted on the inner side thereof a plurality of vertical endothermic fins 18 and on the outer side thereof horizontal radiant fins 17 in several stages, thereby to improve the radiation ratio of the radiant body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type of combustor that focuses on radiation, which can be used for drying and cooking as a relatively small heating device.

Problems with the configuration and implementation of conventional examples Conventional liquid fuel radiant type heaters utilize red-hot radiation. However, its radiation efficiency is about 26 to 30% of the total calorific value, so it is only a radiation type in name, and most of the heat just contributes to convection. Furthermore, the temperature of the radiator is high (800~1
000℃) for K.

Although the density of radiation is high, the amount of radiation in the far-infrared region, which is effective for sensory heating, is relatively small, making it truly incomplete as a radiant heater. Furthermore, most of these type of heaters supply air using natural draft generated by combustion heat, and the fuel is sucked up by the lamp wick and vaporized, but the exhaust gas characteristics have also been improved. The combustion amount variable l] taken into consideration was very small, and the combustor could basically be called a single-point combustion combustor. The reason for this is that when the combustion amount is reduced, the secondary flame, which is the final stage of combustion, drops at the red-hot part, and unburnt gas such as carbon monoxide increases as the flame is cooled by the red-hot body. Met.

OBJECTS OF THE INVENTION It is an object of the present invention to overcome the drawbacks of the prior art and to provide an efficient, comfortable and user-friendly liquid fuel combustor suitable primarily for heating purposes.

Structure of the Invention In order to achieve the above object, the present invention provides first and second perforated plates having a large number of small holes for air supply, a lamp wick disposed between the perforated plates for sucking up and vaporizing fuel; Provided is a liquid fuel combustor that has a flow rate regulator installed in an air intake passage or an exhaust gas passage to adjust the flow rate of the gas body, and a member constituting the exhaust gas passage is configured to also function as a radiator. It is.

DESCRIPTION OF THE EMBODIMENTS The drawings show longitudinal sectional views of essential parts of an embodiment according to the present invention. 1 is a fuel tank in which liquid fuel 2 is stored.

3 is a guide plate for moving the lamp wick 7 up and down (the wick vertical movement mechanism is omitted), 4 is an air intake for combustion, 5, 1o
Each ¥i is an air passage. Reference numeral 6 denotes a fire pan, on which are placed horizontally long first and second perforated plates 8, 9, which are flat plates having a large number of small holes 8a, 9a for supplying primary air.

At this time, the first. The second perforated plates 8.9 are connected at their longitudinal ends. In addition, in this embodiment, the lamp wick 7
．． The perforated plate 8.9 is straight, so that the entire combustor has a similar shape. The part surrounded by the first and second perforated plates 8.9 is the primary combustion chamber 21, 11.12 is a slit-shaped secondary air supply port formed at the upper opening edge of the primary combustion chamber 21, and The top of these is the secondary combustion chamber 15
becomes. 13゜14 are the primary combustion chamber 21 and the secondary combustion chamber 15
A slit-forming plate is located between the two and forms the secondary air supply ports 11 and 12. Reference numeral 16 denotes a radiator that also serves as an exhaust gas passage forming member that forms the exhaust gas passage 22.

This radiator 16 is equipped with a plurality of vertical heat absorbing fins 18 on the inside to promote heat exchange, and on the outside, horizontal heat radiating fins 17 in multiple stages to promote heat radiation. has been done. Here, the radiator 16 is
In order to improve the emissivity, a structure that expands the mechanical surface area by forming many uneven parts on the surface,
Yotsuto blasting, or chemical treatment such as acid treatment 'tt'
c. A method of increasing the microscopic surface area and increasing the blackness at the same time. By increasing the size, applying heat-resistant paint to the surface, etc., a layer of gold oxide is formed, and the microscopic surface area and blackness are increased as described in @. It was coated with black heat-resistant paint. 20 is an exhaust gas outlet;
19 adjusts the draft force of the exhaust gas passage 22 by adjusting the opening area of the exhaust gas outlet 20, adjusts the amount of air supplied to the primary and secondary combustion chambers 21.15, and consequently adjusts the combustion amount. This is a flow regulator consisting of a sliding shutter plate.

Next, the operation in this embodiment will be briefly explained. Normally, in the extinguished state, the tip of the wick 7 is located near the center of the wick guide plate 3, but when ignited, it is made to protrude from the upper casing of the fire pan 6 shown in FIG. is ignited. Thereafter, due to the draft force generated by combustion, the air passes through the air passages 5 and 10 from the air intake 4, and -
The secondary air is supplied from the secondary air supply holes 8a and 9a to the primary combustion chamber 21, and from the secondary air supply ports 11.12 to the secondary combustion chamber 15,
Each is subjected to secondary combustion. The amount of combustion could be adjusted by operating the flow rate regulator 19 to change the draft force and adjust the amount of air supplied. Of course, during the variable period, the air-fuel ratio remained approximately constant, the exhaust gas characteristics were good, and it was suitable for practical use.

1. This embodiment has a configuration that allows radiation in all directions, but if necessary, a reflector can be installed to easily create a configuration that emphasizes radiation in one direction. I can do it.

As described in detail, according to the present invention, by using a combustor whose combustion amount is approximately proportional to the amount of supplied air and using the member forming the exhaust gas passage as a radiator, the following effects can be achieved. effect can be obtained.

a. Conventional radiation type combustors have single-point combustion (constant calorific value combustion), and their radiant efficiency is 25-30% of the total output, while the combustion rate is variable and ranges from 1 to 0.4. 40-6
0%, nearly double the conventional ratio, making effective radiant heating possible.

b. By lowering the temperature of the radiator, the peak of the wavelength range of radiation is shifted to the far infrared range (which is considered effective for sensory heating).
6 to 7 μm), making it possible to improve the sensory heating effect.

C8 The far-infrared wavelength band coincides with the absorption band of water, so
This combustor is also suitable for drying and cooking.

d. Since no red-hot body is provided in the final stage of combustion (secondary combustion part), the generation of unburned toxic gas in the exhaust gas is extremely small, regardless of changes in the combustion amount within the OT variation range.

More than 80 effects can be achieved with an extremely simple configuration, as shown in the examples.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of a liquid fuel combustor showing one embodiment of the present invention. 7...Lamp wick, 8,9...1st. Second perforated plate, 5゜1
Q...Air passage, 22. ・Exhaust gas passage, 19.
・Flow rate regulator, 16...Radiator.

Claims (1)

[Scope of Claims] (1) First and second parts having a large number of small holes for air supply
A perforated plate, a lamp wick located between the first and second perforated plates for sucking up and vaporizing fuel, and a flow rate regulator provided in the air passage or the exhaust gas passage for adjusting the flow rate of the gas body. The member constituting the exhaust gas passage is a liquid fuel combustor that also serves as a radiator. (2) The liquid fuel combustor according to claim (1), wherein the first and second perforated plates and the lamp wick are arranged in a straight line. (3) The liquid fuel combustor according to claim (1), wherein a fin is attached to at least one of the inside and outside of the radiator. (4) The liquid fuel combustor according to claim (1), wherein at least the outside of the radiator is physically or chemically treated to have a larger surface area than before the treatment. (6) The liquid fuel combustor according to claim (1), wherein a layer containing a metal oxide as a main component is provided at least on the outside of the radiator. (6) The liquid fuel combustor according to claim (1), wherein the radiator has a plurality of uneven shapes.