JPH0328653B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid fuel combustion device that burns liquid fuel.

Conventional technology In recent years, home heating equipment that burns kerosene and uses the heat from the fuel has improved ease of use, comfort, indoor pollution, and
Due to the growing awareness of energy conservation, instead of conventional open flame type heaters that use light wicks, etc. to make a wire mesh red hot and heat directly with the radiant heat, we now use a heater that gasifies the fuel and burns it inside a box case, which is installed at the rear. Hot-air types, which use convection blowers to blow hot air to heat the room, are becoming mainstream. Furthermore, with regard to the latter type of hot-air type combustion appliances, there is a demand for an expanded range of variable combustion amount due to the above-mentioned heightened awareness, and various combustion methods have been developed and improved.

An example of a conventional combustion appliance will be described below with reference to FIG. 3. Reference numeral 1 denotes a vaporization cylinder that vaporizes fuel, premixes it with fuel air, and supplies it to the combustion section, and a burner body 2 is placed in the upper opening. There is. 3 is a constriction part provided between the burner body 2 and the vaporizing tube 1, 4 is a burner cap covered with the burner body 2, and 5 is a flame stabilizing tube such as a wire mesh provided in close contact with the outer peripheral wall of the burner body 2. , covering the plurality of flame holes 2a. Note that the lower end of this flame-holding tube 5 is connected to the vaporizer tube 1.
flange portion 1a, and the upper end is the burner cap 4.
The burner body 2 is supported in close contact with the burner body 2, which is covered with a flange portion 4a. 6 is a sheathed heater embedded in the upper part of the vaporizer cylinder 1;
The structure is such that the temperature is maintained above a certain temperature using a temperature controller or the like. Numerals 7 are bolts and nuts for fixing the burner cap 4 to the burner body 2.

The operation of the combustion device configured as described above will be explained below. The fuel injected into the vaporization cylinder 1 is vaporized on the inner wall of the vaporization cylinder 1, which is heated to a high temperature by the sheathed heater 5, and then the blower The combustion air is premixed with the combustion air sent into the vaporization cylinder 1. This premixed gas is supplied to the air chamber 2b in the burner body 2 via the throttle part 3 of the burner body 2, and is ejected from the plurality of flame holes 2a. This premixed vaporized gas is almost uniformly mixed during its passage, and when an ignition means such as a discharge spark from an ignition electrode is applied near the flame hole 2a, combustion starts, A flame is formed in close contact with the flame-holding cylinder 5.

Problems to be Solved by the Invention However, with the above configuration, the discharge cycle of fuel injected into the vaporization cylinder 1 by a pump etc. and the combustion air sent into the vaporization cylinder 1 by a blower etc. Due to the pulsations and the like, the flame that is in close contact with the flame stabilizing tube 5 near the flame hole 2a oscillates little by little. In particular, when the combustion amount is reduced and the flame adheres to the wire-mesh-like flame-holding cylinder 5 and becomes red-hot, the combustion speed increases and the flame gradually increases in red-hot degree. However, when the natural frequency of the volume of the air chamber 2b in the burner body 2 is approximately synchronized with the above-mentioned flame oscillation, a high frequency resonance sound is generated. This resonance sound is very loud and high-pitched, making the user feel very uncomfortable, and also increases the amplitude of the flame fluctuations, increasing the red heat of the flame-holding tube 5 and potentially damaging the flame-holding tube. I had some problems.

The present invention was made in view of the above-mentioned problems, and aims to prevent flame fluctuations and resonance of the air chambers in the burner body, and maintain safe and stable combustion over a long period of time. This is the purpose.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention divides the air chamber in the burner body into a plurality of parts by a partition plate, and has an even space between the partition plate and the vaporizing cylinder. It is constructed by providing a pressure plate.

Effects According to the present invention, with the above-described configuration, the natural frequency of the air chambers in the burner body is approximately several times that of each air chamber divided by the partition plate, and it is possible to prevent resonance noise and synergize with the pressure equalizing plate. This action further prevents resonance, and together with the effect of preventing uneven distribution of gas by the pressure equalizing plate, it becomes possible to obtain safe and stable combustion over a long period of time.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same parts as in the conventional example will be given the same numbers and the explanation will be omitted, and only the different parts will be explained.
Reference numeral 8 denotes a pressure equalizing plate provided in the air chamber 2b in the burner body 2 so as to cover the throttle part 3, and has a large number of holes 8a. A partition plate 9 is placed on the pressure equalizing plate 8 and provided in the air chamber 2b in the burner body 2, and divides the air chamber 2b into a plurality of chambers as shown in FIG.

In the above configuration, the air chamber 2 in the burner body 2
b is divided into four, its volume becomes 1/4, and its natural frequency becomes about four times that before division, and each divided chamber has its own unique frequency. Therefore, the fluctuation of the flame formed in the flame stabilizing tube 5 on the outer periphery of the burner body 2 and the divided air chamber 2b of the burner body 2
It is no longer possible to synchronize with the natural frequency of the oscilloscope, making it difficult to generate resonance sound. Therefore, resonance noise does not disturb the user and make the instrument unusable, and the amplitude of flame oscillation is not increased to increase the degree of red heat of the flame-holding cylinder 5.

On the other hand, the pressure equalizing plate 8 further prevents sound resonance due to its large number of holes 8a, and at the same time disperses the premixed gas supplied through the throttle section 3 throughout the air chambers of the burner body 2. As a result, uneven mixing and uneven ejection of the premixed gas due to eccentricity of the division center of the partition plate 9 can be prevented. Furthermore, this pressure equalizing plate 8 also has the function of blocking large particles of the premixed gas jetted from the vaporizing cylinder 1, and prevents yellow flames etc. generated when large particles are ejected from the flame hole 2a. can be reduced to

In this embodiment, the division center of the partition plate 9 is the aperture part 3.
The air chamber 2b was divided equally into four chambers by placing it approximately in the center and expanding radially toward the outer periphery, but if this is difficult due to the configuration, the size of each divided chamber may be changed. Alternatively, the center of division may be eccentric.
Further, the number of chambers to be divided may be divided into a plurality of chambers so that the volume of one chamber is small if the combustion amount is small, and a division method suitable for the configuration of the device may be adopted.

Effects of the Invention As described above, the present invention provides a partition plate that divides the air chamber in the burner body into a plurality of chambers, and also provides a pressure equalization plate with a large number of air holes below the partition plate to cover the throttle part, thereby reducing combustion noise. Since resonance is prevented and the mixed gas is distributed evenly and homogenized, a safe and stable combustion state can be obtained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of a liquid fuel combustion device of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a cross-sectional view showing an example of a conventional liquid fuel combustion device. 1... Vaporizer tube, 2... Burner body, 3... Throttle part, 8... Pressure equalization plate, 9... Partition plate.

Claims (1)

[Claims] 1. Equipped with a vaporization cylinder that vaporizes liquid fuel and mixes it with combustion air, a burner head provided at the opening of the vaporization cylinder, and a constriction part that constricts the mixed gas in the vaporization cylinder and supplies it into the burner body. , and a partition plate is provided in the air chamber formed by the burner body to divide the air chamber into a plurality of parts, and
A liquid fuel combustion device in which a pressure equalizing plate is interposed between the partition plate and the throttle portion.