JPS605215Y2 - liquid fuel combustion equipment - Google Patents

Description

[Detailed description of the invention] This invention is a device with a relatively low calorific value that is used in oil stoves, oil heaters, etc. The liquid fuel is atomized and sent together with air to the vaporization chamber, where the vaporized fuel mixture is generated. This invention relates to a vaporization premix combustion device that burns fuel in a flame port.

The liquid fuel combustion device of the present invention supplies fuel onto a rotating plate that rotates in an atomizing container, and the atomized fuel is radiated tangentially from the entire periphery of the rotating plate through the opening of the damper. This vaporization premix combustion device is configured so that the fuel passing through the fuel and air is sent to the vaporization chamber along with the air, and a single damper adjusts the amount of fuel and air passing through.This device enables minute combustion and maintains constant combustion even when the combustion amount is changed. The aim is to maintain a constant air-fuel ratio, have a wide range of thermal power adjustment, and achieve stable and complete combustion.

However, since the same damper controls the amount of atomized fuel and air passing through, when the damper is throttled down, the pressure difference between the air before and after the damper increases, and the wind speed passing through the damper opening increases, causing excess mist to flow through the damper. It attracts oxidized fuel and enters the vaporization chamber, disturbing the air-fuel ratio.

In addition, since the combustion amount is changed over a wide range from high flame to low flame with the same flame mouth, the difference in the ejection speed of the flame mouth changes greatly. There was a problem that if the conditions were set to not do so, lift would occur due to strong flames.

The present invention aims to solve the above-mentioned problems by separately providing a fuel damper for regulating the amount of atomized fuel passing through and an air damper for regulating the amount of air passing, and will be explained below with reference to the drawings.

Figure 1 is a longitudinal cross-sectional view showing a liquid fuel combustion device that is a precursor to the present invention, and Figure 2 is a cross-sectional view of the same atomization container and vaporization chamber.
is an atomizing container whose outlet 2 is connected to the inlet 4 of the vaporizing chamber 3.

Reference numeral 5 denotes a cylindrical damper which is inscribed in the atomization container 1, and when rotated by an adjustment lever 6, the opening degree of the opening 7 is changed.

Reference numeral 8 denotes a rotating plate, the rotating shaft 9 of which passes through the lower surface of the atomizing container 1 and forms an air vent 10.

A fan 11, a motor 12, a sub-tank 13, and an oil pump 14 are installed in series under the I conversion container 1, and the sub-tank 13 always maintains a constant oil level by an oil leveler 15 connected thereto.

The rotating shaft 8, fan 11, and oil pump 14 are directly connected to the rotating shaft 9 and driven by a motor 12.

Oil supply pipe 16 connected to the discharge port of oil pump 14
passes through the side of the atomization container 1 and opens above the rotating plate 8.

17 is a drain pipe that connects the lower part of the atomization container 1 and the sub tank 1
3 are connected for communication.

18 is a burner body, and there is a burner port 2 between it and the burner cap 19.
0, and a mixing chamber 22 and a vaporization chamber 3 are formed by a mixing partition plate 21.

23 is a vaporization heater.

The operation of this fuel system is such that when the vaporization heater 23 is first energized and the burner body 18 reaches an appropriate temperature, then the motor 12 is energized to rotate the rotary plate 8, fan 11, and oil pump 14.

Therefore, the fuel flows down at a constant rate from the open end of the fuel supply pipe 16 onto the rotary plate 8, and is radiated as atomized fuel in the tangential direction from the entire circumference of the rotary plate.

By appropriately adjusting the opening degree of the opening 7 of the damper, the radiant fuel that has passed through the opening 7 enters the vaporization chamber 3 and generates vaporized fuel.

At the same time, since the air discharged from the fan 11 is being supplied to the atomization container 1 through the air inlet 10, it passes through the damper opening 7 and flows into the vaporization chamber 3.

The vaporized fuel mixture that has passed through the mixing partition plate 21 and been well mixed in the mixing chamber 22 is ejected from the flame port 20, so that when it is ignited, combustion starts immediately.

Furthermore, the radiation atomized fuel remaining in the atomization container 1 is removed by the damper 5.
The oil collides with the cylindrical surface of the tank and flows down as an oil film, and further flows back into the sub tank 13 through the drain pipe 17.

By changing the opening degree of the opening 7, it is possible to easily adjust the heating power when the amount of atomized fuel passing through the opening 7 and the amount of air flowing in are simultaneously changed.

In addition, the fuel that enters the atomization chamber 1 is a portion of the fuel radiated from the atomization chamber 1, and the amount of oil supplied to the rotary plate 8 is large, making it easy to maintain a constant constant supply to the rotary plate. This enables stable micro-combustion.

However, when the damper 5 is throttled down, the wind speed passing through it increases, attracting the atomized fuel near the opening 7 and disturbing the air-fuel ratio. As mentioned above, there is a large difference, so if you set the conditions for high heat, it will backfire when the heat is low.

FIG. 3 is a longitudinal cross-sectional view showing an embodiment of the present invention, and FIG. 4 is a cross-sectional view of the atomization container and vaporization chamber. An air chamber 10'a formed below the air chamber 10' is connected to the air supply port 4a through an air pipe 10'b.

An air damper 26 has a fixing hole formed in the upper part of the fan case 24 and is pressed against the fan case 24 by a spring 25.
has a movable hole and is rotatable within the air chamber 10'a.

The fuel damper 5' is interlocked with the air damper 26 by means of an interlocking piece 27.

To describe the operation of this embodiment configured as described above, most of the air flowing into the vaporization chamber 3 passes through the air pipe 10'b, the air gap 10' has a large air resistance, and the fuel damper 5' Since it is on the secondary side of the damper 26, the fuel damper 5'
The pressure difference before and after and the amount of passing air are small, so there is no disturbance in the air-fuel ratio.

Further, the amount of air flowing into the vaporization chamber 3 from the fan 11 changes as the air damper 26 rotates, and the amount of fuel that enters the vaporization chamber 3 changes as the fuel damper 5' rotates in conjunction with this.

Since the geometry of the opening 7 of the fuel damper 5' and the geometry of the opening of the air damper 26 are appropriately selected, an optimum air-fuel ratio is maintained over the entire adjustment range from high heat to low heat.

FIG. 5 is a plan view showing the opening of the air damper in another embodiment, and FIG. 6 is a diagram showing the change in air-fuel ratio with respect to the opening of the damper. The air damper 26 has a movable hole 26a. A fixing hole 24a corresponding to this is bored in the upper part of the fan case 24.

The full opening/closing angle of the damper is approximately 45 degrees, and the lower limit of the rated combustion amount is the upper limit of approximately 175 degrees.

In the diagram, point a shows the opening degree of both dampers at the upper limit of combustion amount, and point b shows the opening degree of both dampers at the lower limit of combustion amount. Line F shows the change in the amount of fuel passing through, and line A shows the change in the amount of passing air.

That is, the air-fuel ratio is almost constant from the opening degree a to the opening degree,
When the temperature drops below point b, the air amount ratio doubles.

Therefore, when the temperature reaches a region below the low flame of point b, the air-fuel mixture in the vaporization chamber becomes a nonflammable region, and the flame outlet speed doubles, so that the flame is surely blown out and flashback does not occur.

As mentioned above, the present invention separately provides a fuel damper that regulates the amount of fuel passing through, and an air damper that regulates the amount of air that passes, so that the pressure difference that occurs before and after the fuel damper is small, and the amount of air that passes through them is minimized. Therefore, the optimum air-fuel ratio can be obtained over the entire combustion range.

By doubling the air amount ratio below the lower combustion limit of low flame, safety is ensured by preventing accidental backfire.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of the combustion device that was developed earlier in the present invention, Figure 2
The figure is a cross-sectional view of the atomization container and vaporization chamber, FIG. 3 is a longitudinal cross-section showing an embodiment of the present invention, FIG. 4 is a cross-sectional view of the atomization container and vaporization chamber, FIG. 6 is a plan view showing the air damper and the fan case, and a diagram showing the relationship between the opening degree of the damper and the amount of fuel and air passing through. 1... Atomization container, 2... Outlet, 3...
...Vaporization chamber, 4...Entrance, 4a...
・Air supply hole, 5... Damper, 5'...
Fuel damper, 6...adjustment lever, 7...
...Opening, 10...Air inlet, 10'...
...Gap, 10'a...Air chamber, 10'b.
...Air pipe, 2o...flame mouth, 24...
...Fan case, 24a...Fixing hole, 25
... Spring, 26 ... Air damper, 26a ... Movable hole, 27 ... Interlocking piece.

Claims (1)

[Claims for Utility Model Registration] 1. Liquid fuel flows down to a rotating body installed in an atomizing container, and a part of the atomized fuel radiated from the entire circumference of the rotating body is selectively sent to a vaporization chamber. A liquid fuel combustion device characterized in that a fuel damper is provided, an air damper is provided in an air path leading from a blower to a vaporization chamber, and the fuel damper and air damper are interlocked. 2. Claim No. 2 of the utility model registration characterized in that both dampers are linked so that when the fuel damper is throttled down to become below the lower limit of the rated combustion range, the amount of air passing through the atomized fuel increases rapidly. The liquid fuel combustion device according to item 1.