JPS58219312A - Burner - Google Patents

Abstract

PURPOSE:To shorten a time required for preheating of a gasifying body by means of a heater, by changing a discharge direction on the fuel during ignition and constant combustion. CONSTITUTION:With a heater 9 being energized, a gasifying body 8 is increased in temperature. With a blower 7 energized and a fuel pump 3 then driven, the fuel is discharged through a pipe 1 and collides with the inner wall surface of the gasifying body 8 for gasification. A premixture gas of a gasified gas and the air is jetted through pores 12 in a flame flow uniforming cylinder 11 against an external surface of a wire net cylinder 13 where it is ignited by discharge parks, etc., and starts to burn. After combustion starts, the flame flow uniforming cylinder 11 and a cap 14 are rapidly increased in temperature by the radiant heat and the heat of exhaust gas from the wire net cylinder 13 being red- heated. Thereafter through switching of a control means 4 for fuel discharge direction, the particles of the fuel fly into the flame flow smoothing cylinder 11 without making contact with the gasifying body 8, and collides with the cap 14 for gasification.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device using a vaporization premix combustion method using petroleum as fuel, which is applied to home heaters and the like.

A conventional combustion apparatus of this type is constructed as shown in FIG. To explain with reference to the drawings, 25 is a fuel pump, 26 is a supply pipe, and a guide tube 28 for air supplied from a blower 27 is located outside these pipes. A heater 30 heats the vaporized body 29 and the partition plate 31 . A flame 2 vane hole 32 made of a wire mesh, a reinforcing ring 33, and a cap 34 are connected to the upper part of the vaporizer 29. 35 is an outer cylinder made of glass or the like, and 36 is a support ring.

In this combustion device, first, the heater 30 is energized to preheat the vaporized body 29 to 250 to 270° C. for about 5 minutes, and then fuel and primary air are supplied to generate a premixed gas in the vaporized body 29. This premixed gas is ejected from the inside of the flame hole portion 32 to the outside and burned. In this case, after the start of combustion, the flame hole part 32, the outer cylinder 3
Although the conduction heat from 6' and the width side heat from the flame feed back to the vaporized body 29, it is very small and cannot sufficiently heat the vaporized body 29, which is cooled by the fuel and air.

Therefore, even after combustion starts, the power to heater 3o is 0N-OFF.
Alternatively, since the vaporized body 29 is always controlled to be kept at a constant temperature or higher by the proportional means, power saving cannot be achieved. Further, the vaporized body 29 has a problem in that it has a large heat capacity and requires a long preheating time.

Conventionally, in addition to the above configuration, there is also a type 3 page in which the combustion flame is applied directly to the upper part of the vaporized body 29 to provide heat feedback, but it is difficult to shorten the preheating time, and when the room temperature is low below 0°C, the vaporized body heater is There are problems such as the need to supply electricity to 30.

The present invention eliminates these conventional problems, and improves usability by greatly shortening the preheating time for a vaporized heater, and immediately after the start of combustion, the fuel is vaporized and transferred by combustion heat to the heater. The purpose of this is to turn off the power to the device and save power.

In order to achieve this object, the present invention provides fuel discharge direction control means for rotating a pipe that discharges liquid fuel,
This effectively changes the fuel vaporization area between ignition after preheating and during steady combustion.

That is, at the time of ignition, the fuel scatters outward, hits the inner wall surface of the vaporized body heated by the heater, and is vaporized. This □ premixed gas is ejected from a flame hole connected to the vaporized body and burned, but the temperature of the rectifier tube and cap provided in this flame hole increases rapidly. At this time, the discharged fuel particles travel straight along the central axis and hit the cap of the flame hole without contacting the vaporized body, where they vaporize and burn.

Therefore, after the start of ignition combustion, instead of feeding back the combustion heat to the vaporizer with a heater, by using part of the flame hole to act as a vaporization wall, the electricity to the heater of the vaporizer is turned off immediately after the start of combustion. can. The room temperature is 0
Even at low temperatures, such as above ℃, vaporization is possible using only combustion heat, resulting in large power savings. Furthermore, the vaporizer having a heater can be made smaller and the preheating time can be shortened.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Note that the same parts in FIGS. 1 to 3 are given the same numbers.

In the figure, 1 is a pipe and 2 is its flexible part. 3 is a fuel pump to which pipe 1 is connected. Reference numeral 4 denotes a rotatable fulcrum, which constitutes fuel discharge direction control means. 7 is a blower, and 5 and 6 are air conduits. Reference numeral 8 denotes a cylindrical vaporizer having a heater 9, which is made of aluminum or the like.

Reference numeral 10 denotes a flame hole section, which is composed of a well-shaped fluid 11 having a large number of small holes 12, a wire mesh cylinder 13 positioned with a small gap, and a cap 14 that closes the tips of these. It is connected to the vaporizer 8 together with the cylinder 15 .

Next, to explain the operation of the combustion apparatus having the configuration described in section 2, first, when electricity is applied to the heater 9 of about 500 W, the temperature of the vaporized body 8 rises to 250 to 270° C. in about 2 minutes.

As shown in Fig. 1, the blower 7 is energized, and then the fuel pump 3
When driven, fuel is discharged from the pipe 1, hits the inner wall surface of the vaporizer 8, and is vaporized. The premixed gas of vaporized gas and air passes through the small holes 12 of the straightening tube 11 and is ejected onto the outer surface of the wire mesh tube 13, where it is ignited by discharge sparks or the like and starts combustion. After the combustion starts, the temperature of the rectifier tube 11 and cap 14 rapidly rises to 400 to 500'C due to radiant heat from the red-hot wire mesh tube 13, exhaust heat, etc. From this point on, as shown in FIG. 2, by switching the fuel discharge direction control means, the fuel particles advance through the rectifier tube 11 without contacting the vaporized body 8, and are vaporized when they hit the cap 14. . Further, when the particles are scattered inside the straightening cylinder 11, a part of the particles vaporizes in the high temperature atmosphere.

These allow the vaporization state to be changed without affecting combustion in any way.

FIG. 3 shows temperature changes during the above operation.

First, when electricity starts to be applied to the heater 9, the temperature of the vaporized body 8 rises as shown by the solid line, and later the temperature of the cap 14 also rises as shown by the broken line due to conduction heat. After about 2 minutes, the vaporized substance 8 will be 270
The temperature camp 14 becomes a wing of about 100 degrees Celsius, and when fuel is supplied here and combustion is started, the temperature of the cap 14 rises rapidly, and the vaporized body 8 turns off the electricity to the heater 9.
As a result, the temperature drops to a certain level.

In this way, according to this embodiment, fine particles of fuel are vaporized using the vaporizer 8 which is heated by the heater 9 only for a very short time during ignition, and after the start of combustion, the cap 14 which is a part of the flame hole part 10 By acting as a vaporizing wall, there is no need to consider the feedback of heat from the flame hole 10 to the vaporizing body 8 having the heat 9, and in the steady state of use after the start of combustion, Since it evaporates on the vaporization wall and in the atmosphere, there is very little tar adhesion. Since the vaporizer 8 also vaporizes the fuel only during ignition combustion, it can be made smaller and the preheating time can be shortened.

As described above, according to the combustion device of the present invention, fuel particles can be vaporized most effectively by changing the fuel discharge direction between ignition and steady combustion, resulting in significant power savings and It is possible to shorten preheating time10

[Brief explanation of the drawing]

1 and 2 are side sectional views of a combustion device according to an embodiment of the present invention, FIG. 3 is a characteristic diagram showing a temperature change curve of the same embodiment, and FIG. 4 is a side sectional view of a conventional combustion device. It is a diagram. 1...pipe, 3...fuel pump, 4...
...Fully point (fuel discharge direction control means), 8...
Vaporized body, 1Q...flame hole, 14...cap. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 7 no pocket Sojin

Claims (1)

[Claims] A pipe that discharges liquid fuel, a vaporizer that vaporizes the liquid fuel discharged from this pipe, a blower that supplies combustion air to the vaporized gas in this vaporizer to create a premixed gas, and a blower that creates a premixed gas. A combustion device having a flame hole portion for burning fuel, and provided with fuel discharge direction control means for moving the pipe.