JPS60175918A - Combustion device of liquid fuel - Google Patents

Abstract

PURPOSE:To accelerate evaporation rate and consequently contrive to stabilize combustion by a method wherein the temperature of the vaporizing surface of a vaporizer is changed by changing the setting temperature in response to the increase and decrease of liquid fuel. CONSTITUTION:The fuel jetted out of the tip nozzle part of a fuel capillary 6 turns into particles, collides against the wall surface 19 of a vaporizer 1, turns into vaporized gas on receipt of the heat from the wall surface 19, flows into a combustion cylinder 14, mixes with air, flows from the periphery of the combustion cylinder, onto which a wire mesh is arranged, outwards as premixed gas, is ignited in a combustion space 16 so as to form combustion flame onto the surface of the combustion wire mesh 13. In this case, a vaporizer 1 is heated both by the combustion gas diffused through the side surface of the vaporizer 1 outside from jets provided on a supporting cylinder 18 and by the heat conducted from the combustion flame. In addition, if the feedback of heat by combustion toward the vaporizer 1 is not enough, a temperature detector 20 detects said unsatisfactory feedback and raise the temperature of the vaporizing surface of the vaporizer up to the set value in response to the combustion rate by means of a heater 2, resulting in accelerating the evaporation of fuel and consequently no development of combustion disturbance due to vaporization lag, odor and smoke is realized.

Description

[Detailed Description of the Invention] The industrial 4;1" 5F Nonoe invention is based on the invention of a 5F engine that uses a vaporizing surface to emit fuel.
It is for 1 hour to the M body fuel combustion device.

Conventionally, this 4111 liquid fuel combustion device had a heater buried in the lower part of the vaporizer, and a ventilation passage connected to a ventilation fan on the side wall of the vaporizer and a nozzle at the tip. The fuel capillary tube made up of the fuel pump is connected to the fuel pump. The upper part of the carburetor is provided with a combustion tube.

A temperature sensor (thermistor, etc.) is embedded in the vaporizer to control the heater. With this configuration, the combustion
14. The vaporizer is heated by the combustion scum and the conductive heat from the flame. The amount of heating increases or decreases depending on the combustion path, the heat receiving structure, and the change in the combustion temperature.

In addition, when the temperature of the vaporizer was not sufficient, the temperature sensor activated (1) and the heater was energized to maintain a constant temperature.

Even when the amount of combustion increased or decreased, the wall surface of the carburetor remained at a constant temperature of tW. For this reason, combustion (([
When the temperature is low, the amount of heat of vaporization that the fuel receives from the wall is low.
The fuel temperature during the rice evaporation process is higher than 1, and the fuel r-1 becomes like a lump, and the evaporation rate becomes slow, resulting in a fuel-air ratio of 11. J
This resulted in sagging and artificial pulsation, resulting in odors and misfires. In addition, when the fuel vibration increases, it is common for the fuel to absorb a lot of heat input from the wall because there are four layers of fuel, so the temperature of the vaporized wall surface and the fuel increases, Although the temperature of ζζ is low, the evaporation rate is slow.
The decomposition of the fuel stagnation and combustion caused by L caused the generation of cool. As a result, sagging combustion due to delayed vaporization, outflow of unburned residue, odor, and generation of tar are
I was unable to use the control of the fire engine, and I7, Nagatochima, was unable to use it due to the dangers such as the flames.

Purpose of invention The purpose of non-invention is to stabilize and maintain combustion.

The disaster of invention and non-invention is the vaporization of the fuel vaporizer i1u /i,'
The evaporation rate is increased by changing the installed temperature according to the amount of fuel used, so that stable combustion occurs without delay in vaporization.

Description of examples Hereinafter, -C reading will be explained based on one example of non-invention.

In Fig. 1, a toy-shaped carburetor 1 side panel F) is embedded with a heater 2, and is equipped with a mixing plate 3 whose aperture shape is adjusted to the opening amount. There is. Furthermore, a blower fan 5 of 11 ft+ is attached to the peripheral wall of the carburetor 1 via a blower passage 4, and the tip forms a nozzle. ' 6 is passed through the ventilation passage 4 to face the carburetor 1 from the air kit 7, and the other end of this fuel tube 6 is connected to the fuel tank 9 via the fuel injection pump 8. ing. At the upper part of the carburetor 1, along the circumference thereof, there is a rectifying cylinder 11 formed into a cylindrical shape and having a large number of pores 10, and a combustion chamber provided around the rectifying cylinder 11 via a rectifying space 12. A burnt sheet 14 consisting of a wire mesh 13 is provided, and this burnt sheet 14 is attached to a closing plate 15.
The upper end is closed by Further, an outer cylinder 17 is provided around the combustion chamber 14 through a combustion space 16 whose one end is closed by a closing plate 15, and the other end of this outer cylinder 17 is covered with a support tube 18, and the combustion residue is removed from the combustion chamber 14. A passage is provided for the flow to the outside through the spout 21 provided in 18!戎-fru.

A temperature plate 9:11 m 2 (J (thermistor, etc.)) that detects the temperature is embedded in the carburetor 1 glue old hj 19 to control the on/off of the heater 2. When there is little combustion wind, the operating temperature of the nln degree detector 20 is set to 280 to 320°C, and it is raised according to J" + j + addition of combustion - 1. When there is a lot of combustion wind, the riri degree detector 20 20 operation setting value from 380 to 4
50"C. Also, the shape, material, and passage area of each component are adjusted so that the amount of heat received from the combustion scum to the vaporizer 1 is greater than the amount of heat received from the combustion flame to the vaporization chamber 1. Set.

In this structure. By energizing the heater 2 in the vaporizer 1, the vaporizer 1 is heated.

After this, an air kite 7 is installed in the carburetor 1 by driving the air blower 7 provided through the air blowing passage 4.
Combustion air is introduced from ljL. Then fuel pump 8
Fuel is sucked from the fuel tank 9 by the drive of
: #ii 'it' Fuel is injected into the carburetor 1 from the Qii+i nozzle section beyond b. The ejected fuel becomes granular and collides with the wall surface 19 of the vaporizer 1, receives heat of 1, 1ifjrijjj'i9 which is ll:I+ temperature, becomes vaporized scum, and passes through the constricted part of the mixing plate 3 disposed at the top. and flows out to combustion v114. At this time, the vaporized fuel scum is mixed with combustion air and flows outward from the periphery of the combustion tube 14, which is equipped with a wire mesh, as a premixture, and is transferred to the outer tube 17 and the combustion tube 1.
A combustion flame is ignited by an igniter (not shown) in the combustion space 16 between the combustion wire meshes 13 and 4, and a combustion flame is formed at the front bend of the combustion wire mesh 13.

In this case, from the combustion amount 11116, combustion scum spreads outward from the jet nozzle provided in the support tube 18 through the side curve of the carburetor 1, and vaporization f(;'
i 1 Do not heat. This heating heat amount is combustion 1II-
It increases or decreases depending on the change in temperature, course, and heat receiving configuration. T, the temperature of the combustion residue increases as the amount of combustion increases.
t"l', 1: The amount of heat received by the vaporizer 1 increases.-
However, as the amount of heat conducted from the combustion flame increases, the flame becomes more traceable than the flame 1, and the temperature near the flame 1 decreases. Therefore, when the number of fuel cartridges increases, the amount of heat received by the carburetor 1 decreases. Therefore, by controlling the amount of heat received by both, when the combustion amount is small, the temperature of the wall surface of the carburetor 1 is set to about 300℃, and when the combustion amount is large, the accuracy of the wall surface of the vaporizer 1 is set to 45℃.
It is constructed so that the temperature is about 0°C. Further, when the feedback of heat to the carburetor 1 due to the amount of combustion is insufficient, the temperature detector 20 senses it and the heater 2 adjusts the temperature JJ to a set value corresponding to the amount of combustion. Fuel burnout, evaporation rate and vaporization surface due to (fuel vaporization amount) changes 7161
Figure 2 shows the trend in the degree of The evaporation rate due to the high 7M wall surface of fuel 1 knee 4 increases in proportion to the temperature between the walls.However, at a certain temperature, the fuel becomes like a ball and the evaporation rate of fuel t゛] and li'Q songs increases. This combustion: 1 scum accumulates, heat transfer is low, and the evaporation rate is low regardless of the increase in heating. It shifts from nuclear boiling v11 evaporation to film boiling evaporation. When rili' is further increased by a degree, W becomes f faster. In order to increase the ratio of fuel to air and prevent tar formation and accumulation, slow vaporization is required.1. The evaporation rate that does not produce any evaporation is the shell of the shell, or the stomach! Delicious. Shigashi) Mokufu 4! However, if it is exposed too far to the west, it will cause a fire. As is clear from Fig. 2, when the fuel output is low, the heat of evaporation -1↓ is small fλ, so the temperature of the entire fuel tank 91 becomes more uniform, and the gap between the walls ? The peak of the evaporation rate is reached at about 250°C. Also, when the amount of combustion is large,
On the other hand, since the amount of heat of vaporization of the fuel is large, the temperature rises in the thickness direction of the fuel, and the wall surface temperature becomes lower than that in the wall. Therefore, since the temperature of the fuel as a whole becomes lower than the wall surface setting temperature, the evaporation rate peaks at about 400'C at the wall surface i'11:l I north. As can be seen from this, vaporization can always be carried out at the peak of the evaporation rate by controlling the wall surface temperature (1) down by -1 in accordance with the amount of combustion. As a result, the fuel evaporates and vaporization is delayed. It does not produce any burning sewage, odor, or smoke, and can prevent the generation and accumulation of coolant.

Effects of the Invention The present invention changes the temperature of the vaporization surface of the vaporizer where the fuel V1 evaporates, by changing the set temperature according to the increase or decrease of the liquid fuel.
Increase the evaporation rate and cause abnormalities due to disturbances in the fuel-air ratio! '
;Without combustion 5 (occurrence of soot, standing yellow flame, odor), and with tar generation and storage h''1 due to vaporization delay, 1
．． It can be operated for a long time without causing misfires, fuel accumulation, etc. Old 1
” It is something that becomes Noh. Furthermore, the stabilization of combustion makes it possible to increase the number of people in the combustion chamber, improves controllability over load, and improves comfort and energy saving.

[Brief explanation of the drawing]

Figure 1 shows one embodiment of the present invention as 7Jbes11i1+ +I
nlSen, Kasumi 32N is a diagram showing the evaporation rate of Nenho,']. 1. Vaporizer, 2. Heater, 5. Sending I! a777.
8 fuel hop, 14-- at581iaj, 20
Temperature detector. Name of agent: Patent attorney Toshio Nakao, 1 person. Figure 1

Claims (3)

[Claims] (1) In addition to connecting the combustion section with a vaporizer having a means for supplying diffuse combustion and air and a heating means, it is possible to control the temperature of the vaporization wall of the vaporizer using the heating means mentioned above. A liquid fuel/l combustion device that changes according to the increase or decrease of fuel in the body. (2) Heat the heating shade by means of detecting the surface temperature.
The liquid fuel combustion device according to item 1 of the patent control (scope of the invention). (3) The temperature of the vaporization wall was changed proportionally according to the temperature of the combustion section! 11 Konohyo's S1 + Sen) 11
Liquid fuel combustion equipment of the 1911th Yokohama.