JPH02279906A - Liquid fuel burning apparatus - Google Patents

Abstract

PURPOSE:To obtain a liquid fuel burning apparatus which can stably burn for a long period by simply altering combustion amount by providing driving means for rotating a rotary scattering tool for finely granulating liquid fuel by scattering, fuel supply means for supplying liquid fuel to the tool, and controller for controlling liquid fuel supply amount. CONSTITUTION:Supplied fuel is uniformly scattered from the whole periphery of a rotary tray 1 to be finely granulated, the granulated fuel particles are momentarily vaporized by a carburetor 10, and ignited. Then, combustion is immediately started. After the combustion is started, high temperature combustion gas is raised in a combustion chamber 14 to generate draft force, the air necessary for combustion is supplied from air holes 15 of inner and outer flame cylinders 11, 12 into a combustion chamber 14, and the combustion is maintained continuously. Since the fuel is supplied uniformly from the whole periphery of the tray 1, peripheral flame distribution in the chamber is improved. When combustion amount is not altered, a pump 7 is controlled by a driver 8 to alter the fuel supply amount. An electromagnetic pump is used as the pump 7, and combustion amount can be easily varied by altering its driving frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a liquid fuel combustion device used for home heating and the like.

[Conventional technology]

Conventionally, as this type of combustion device, 2, for example, JP-A-63-
There is a combustion device used in oil stoves and the like as shown in Japanese Patent No. 49606. As shown in the cross-sectional diagram of main parts in Fig. 3, this is done by exposing the tip of the wick '+19 to the combustion chamber I formed between the outer flame tube α2 and the inner flame tube (111), which have many air holes. Normally, in such a combustion device, the combustion chamber (I4) is moved from the air hole α of the outer flame tube and the inner flame tube I by the draft force of the combustion gas rising. The air drawn into the combustion chamber I and the fuel vaporized from the lamp wick are mixed and combusted, producing a heating effect from high-temperature combustion gas, and at the same time, a heating effect from radiant heat is also obtained by making the red-hot brocade red-hot.

[Problem to be solved by the invention]

However, the above configuration has the following problems.

In a combustion device using a lamp wick, in order to change the amount of combustion, a complicated mechanism is required to move the lamp wick up and down to change the exposed length of the lamp wick. In addition, when using this type of combustion device to automatically change the combustion chamber in order to maintain the indoor temperature at the desired set temperature, the mechanism for automatically raising and lowering the wick becomes even more complex. . Furthermore, even when the above mechanism is used to automatically change the exposed length of the wick in order to change the amount of combustion, the amount of combustion that can be obtained depending on the exposed length is not always the same. Even if the exposed length is the same, tar builds up on the wick due to differences in the temperature of the outer and inner flame tubes or the temperature of the combustion air, or due to long-term use or bad kerosene fuel. This is because the amount of fuel evaporation changes if the fuel deteriorates. Therefore, it is difficult to automatically control the amount of combustion in combustion devices that use lamp wicks.

In addition, when igniting a wick with one ignition device or a matchstick,
It takes some time for the flame to spread all around the wick and achieve steady combustion, but during this time it is necessary to finely adjust the exposed length of the wick in order to obtain good combustion conditions. Even in the case of steady combustion, if the exposed length of the wick or the degree of deterioration of the wick is uneven, the flame may not be formed uniformly around the entire circumference of the combustion chamber. Furthermore, if you lower the wick to extinguish the fire.

The heat remaining in the wick and the adjacent wall causes the fuel contained in the wick to evaporate, releasing odors and unburned substances.

This invention is intended to improve these problems, and it is easy to automatically control the amount of combustion, has excellent ignition and extinguishing properties, uniformity of flame in the circumferential direction, and is stable even for long-term use. The purpose is to provide a combustion device that can ensure combustion.

[Means to solve the problem]

The liquid fuel combustion device of the present invention includes an outer cylinder, an inner flame cylinder and an outer flame cylinder each having a large number of air holes provided in the outer cylinder, and a lower end of a combustion chamber formed between the inner flame cylinder and the outer flame cylinder. established in the department,
A rotary scattering device that uses its rotation to scatter and atomize the liquid fuel uniformly supplied in the circumferential direction of the combustion chamber, a driving means that rotates the rotary scattering device, and a fuel that supplies the liquid fuel to the rotary scattering device. The fuel supply device includes a supply means and a controller for controlling the liquid fuel supply value of the fuel supply means.

[Effect]

In order to supply fuel with a fuel supply means such as a pump, the amount of liquid fuel supplied by the fuel supply means is controlled by a controller (frequency control, etc.).

You can easily control the amount of combustion.

In addition, since the supplied fuel is dispersed and atomized from the rotating rotary scattering tool, the ignitability is improved. and,
Since the fire is extinguished immediately when the fuel supply means such as the pump is stopped by the controller, there is no emission of odor or unburned substances, and the fire extinguishing performance is also good. Further, since the fuel is scattered from the entire circumference of the rotary scattering device, the uniformity of the flame in the circumferential direction is also improved.

Furthermore, since a lamp wick or the like is not required, stable combustion can be ensured without a decrease in combustion amount due to deterioration of the lamp wick.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of the main parts of a liquid fuel combustion device according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the rotary scattering device in FIG. Figure, (B)
is a sectional view. In the figure, (1) is a rotating scattering device, in this case a rotating plate, and a cross-shaped rotating plate mounting bracket (2
) is the driving means for rotating the rotary scattering tool (3).
) is attached to the rotating shaft. An air hole (4) is opened in the center of the rotating plate (1), and air can escape to the top through this air hole (4). (5) is a fuel supply pipe which extends from the fuel tank (6) via the pump (7) and through the air hole (4), and its end faces the upwardly facing inner surface of the rotary plate (1). The fuel supply means is this fuel supply pipe (5)
and a pump (7).

(8) is a controller that controls the amount of liquid fuel supplied, and in this case is a drive device for the pump (7). rotation, [IIl
On the outside of (1) is located a vaporizer α into which a heater (9) is cast, and this vaporizer (10) is made of a material with good thermal conductivity such as aluminum. An inner flame tube αυ and an outer flame tube α2 are placed on the top of the carburetor QOI. (13 is the outer cylinder and the inner flame cylinder U.

9. The outer flame tube aZ and the outer flame tube αJ are sequentially arranged concentrically from the inside. The space between the inner flame tube αD and the outer flame tube α2 is the combustion chamber fi4. In the lower part of the combustion chamber α, a better combustion condition can be obtained if the proportion of air flowing into this part is small. The positional relationship is such that the gap 11 is minute.A5 is the air hole provided in the inner flame tube (III) and the outer flame tube az.Qll is the inner flame tube (Ill mounted on the top plate). (171 is a transmission cylinder made of a transparent material such as glass, which constitutes the outer cylinder α3, is located on the upper part, and transmits the radiant heat from the red-hot part aS.

Next, the operation will be explained. After heating the vaporizer (Ll) to a predetermined temperature (usually about 250 to 300° C.) using the heater (9), the motor (3) rotates the rotary plate (1) at a predetermined number of rotations. The pump (7) is driven to supply a predetermined amount of fuel from the fuel supply pipe (5) to the upper surface of the rotating plate (1).The supplied fuel is evenly scattered from the entire circumference of the rotating plate (1). The atomized fuel particles are instantaneously vaporized in the vaporizer a1.If they are ignited by an ignition means (not shown) such as a spark or a small ignition heater, combustion begins immediately.This ignition In this case, since the fuel gas that has vaporized and reached a high temperature is ignited, the ignition performance and flame transfer in the circumferential direction are better than when igniting with a conventional lamp wick.After the combustion starts, the high temperature combustion gas A side draft force is generated by raising the combustion chamber α, and the air necessary for combustion is supplied into the combustion chamber I through the air hole α9 of the inner flame tube (1B) and the outer flame tube (12), and combustion is maintained and continued. The air inside the inner flame cylinder αJ that is introduced into the combustion chamber α is supplied through the air hole (4) of the rotary plate (1), but the area of this air hole (4) is sufficiently large. Since the pressure loss in this part is small, the necessary and sufficient amount of air can be supplied by the draft force, and good combustion conditions are ensured.In this device, the vaporized fuel and the air hole in the combustion chamber fi4) are Since the air diffused through α9 burns slowly at a relatively low temperature, there are fewer emissions of carbon oxide (CO) and nitrogen oxides (NOx), resulting in less indoor air pollution. During steady combustion, the heat from the red-hot part brocade increases the heating effect as radiant heat, and some of the heat is transferred directly from the flame at the outer flame and the base to the vaporizer Q (I), so the electricity from the heater (9) is transferred. No input is required.Furthermore, since fuel is uniformly supplied from the entire circumference of the rotating plate (fl), flame distribution in the circumferential direction inside the combustion chamber is good.If you want to change the combustion amount, use the drive device (8) All you have to do is control the fuel pump (7) to change the amount of fuel supplied.When automatically controlling the combustion amount, adjust the pump (7) so that the combustion amount corresponds to the room temperature while detecting the room temperature. ).The pump (7) is usually an electromagnetic pump, and the amount of combustion can be easily changed by changing its drive frequency.When extinguishing a fire, the drive device (8) is used to control the pump. When (7) is stopped, combustion is immediately stopped, resulting in less odor and unburned matter being emitted and good fire extinguishability.

In addition, in the above embodiment, when performing one ignition operation, the heater (9
), but since the fuel is atomized by the one-rotation dish (11),
It is possible to ignite without using the heater (9) and without raising the temperature of the vaporizer (II), and there is no problem even without the vaporizer. When the temperature rises, it instantaneously vaporizes and becomes a high-temperature fuel gas, resulting in even better ignition performance with extremely low odor and unburned emissions upon ignition.

〔Effect of the invention〕

As described above, according to the present invention, there is provided an outer cylinder, an inner flame cylinder and an outer flame cylinder having a large number of air holes provided in the outer cylinder, and a combustion formed between the inner flame cylinder and the outer flame cylinder. A rotary scattering device that is provided at a lower end of the combustion chamber and scatters and atomizes the liquid fuel uniformly supplied in the circumferential direction of the combustion chamber through its rotation, a driving means for rotating the rotary scattering device, and the rotary scattering device. By providing a fuel supply means for supplying liquid fuel to the fuel supply means and a controller for controlling the liquid fuel phase supply leaf of this fuel supply means, the amount of combustion can be easily changed.

Liquid fuel combustion is easy to control automatically, and because it vaporizes and burns atomized fuel particles, it has good ignition and extinguishing properties, improves flame distribution in the circumferential direction, and ensures stable combustion even during long-term use. There is an effect that the device can obtain.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional configuration diagram of essential parts showing a liquid fuel combustion device according to an embodiment of the present invention, FIG. 2 (A) is an enlarged plan view of a part thereof, FIG. FIG. 3 is a cross-sectional configuration diagram of main parts of a conventional liquid fuel combustion device. In the figure, (1) is the rotating side, (3) is the motor that is the driving means, (7) is the pump that constitutes the fuel supply means, and (8) is the motor that is the driving means.
) is the drive device for the pump (7) which is the controller, and αD is the inner flame cylinder. a'a is the outer flame cylinder, (ty is the outer cylinder, αxun is the combustion chamber, a
'a' is an air hole. In Figure 9, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] an outer cylinder, an inner flame cylinder and an outer flame cylinder having a large number of air holes provided in the outer cylinder, and a combustion chamber provided at the lower end of the combustion chamber formed between the inner flame cylinder and the outer flame cylinder, and arranged around the periphery of the combustion chamber. A rotary scattering tool that scatters and atomizes liquid fuel uniformly supplied in a direction by its rotation, a driving means for rotating this rotary scattering tool, a fuel supply means for supplying liquid fuel to the rotary scattering tool, and this fuel. A liquid fuel combustion device including a controller that controls the amount of liquid fuel supplied by a supply means.