JPS62119312A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To lower a combustion sound and carry out a safe and stable combustion of the burner by providing a burner body in the opening of a vaporizing cylinder, and flow-contracting a mixed gas within the vaporizing cylinder at the turn-down portion with a smoothing apparatus to supply the same to the burner body. CONSTITUTION:A liquid fuel ejected from a nozzle 9 is atomized by air fed through a throat 8 and hits against the inner wall of a vaporizing cylinder 1, and forms a mixed gas. The mixed gas passes through a smoothing apparatus 11 and is smoothed and fed to an air chamber 2. The thus fed mixed gas is ejected through burner ports 2a and ignited and turned out to be a flame hermetically adhering to a flame holding cylinder 5. In this construction, the staying time of the mixed gas within the vaporizing cylinder 1 is prolonged by the resistance of the smoothing apparatus 11, and hence a uniform mixed gas is obtained. Furthermore, it is possible to suppress the pulsation in the discharge period of a pump to reduce the vibration on the flame, and to reduce the air flow sound by smoothing holes 11a to suppress the width of the flame. Accordingly, a combustion sound can be reduced and a stable combustion can be obtained.

Description

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

Conventional technology In recent years, household heating equipment that burns kerosene and uses its combustion heat has become more user-friendly, comfortable, indoor pollution, energy saving, etc. Due to the increasing awareness of the issue of ease of use, comfort, indoor pollution, energy saving, etc. The mainstream is the open flame type heater that heats the room directly, and the hot air type that heats the room by gasifying the fuel and burning it in a box case, which is then blown out as hot air by a convection blower installed at the rear to heat the room. It has become to. Furthermore, in the latter type of hot air type combustion appliances, due to the above-mentioned heightened awareness, there is a demand for a wider range of variable combustion amount, and various combustion methods have been developed and improved. An example of a conventional combustion appliance will be described below with reference to FIG. Reference numeral 1 denotes a vaporization cylinder which vaporizes fuel t', premixes it with combustion air, and supplies it to the combustion section, and has a burner body 2 mounted on its upper opening. Reference numeral 3 indicates a constriction portion provided between the burner body 2 and the vaporizing cylinder 1, 4 indicates a burner cap covered by the burner body 2, and 6 indicates a protection member such as a wire mesh provided in close contact with the outer circumferential wall of the burner body 2. With a flame tube,
It covers a plurality of flame holes 2a. The lower end of the flame stabilizing cylinder 5 is covered by the flange part 1a of the vaporizing cylinder 1, and one end is covered by the flange part 4a of the burner cap 4, and is supported in close contact with the burner body 2. 6 is carburetor cylinder 1
The structure is such that the temperature of the vaporizing cylinder 1 is maintained at a constant level of humidity or cold using a temperature controller or the like using a sheathed heater embedded in a part of the cylinder. 7 is burner body 2 and burner cap 4
Bolts and nuts are used to secure everything in place. 8 is a throat that atomizes the fuel discharged from the nozzle/l/9, and the tip thereof looks into the vaporization cylinder.

The operation of the combustion apparatus configured as above will be described below. The fuel injected into the vaporizer cylinder 1 from the nozzle/L/9 is atomized by combustion static electricity sent from the blower through the throat 8, and is heated to a high temperature by the sheathed heater 5 on the inner wall of the vaporizer cylinder 1. It is vaporized and premixed in 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 through the plurality of flame holes 2a. Will combustion occur if the ignition means such as the discharge spark of the ignition electrode is placed near the flame outlet 2a? The flame starts and forms a flame in close contact with the flame-holding cylinder 5 near the flame hole 2a.

Problems to be Solved by the Invention However, with the above configuration, the pump etc.
Due to the synchronization of the discharge of the fuel injected into the vaporizer cylinder 1, the mixed gas concentration changes (v) and the flame closely attached to the flame stabilizing cylinder 5 near the flame hole 2a oscillates little by little. Furthermore, the mixed gas concentration in the air chamber 2b is also non-uniform, which further amplifies the fluctuation. As a result, the fluctuation of the flame caused flame vibration and increased combustion noise.

Furthermore, the wind noise from the throat synchronized with the flame vibrations and amplified the combustion sound.

In addition, when the combustion amount is reduced and the flame adheres to a wire-mesh-like flame-holding tube and becomes red-hot, the combustion speed increases, and the flame gradually becomes more red-hot.

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.

Since this resonance sound is very loud and high-pitched, it makes the user feel very uncomfortable, and also increases the amplitude of the flame fluctuation, increasing the degree of redness of the flame-holding tube 5 and potentially damaging the flame-holding tube. It had some problems.

The present invention was made in view of the above-mentioned problems, and aims to reduce combustion noise by preventing flame fluctuations, and also prevents resonance of the air chamber in the burner body to ensure safe and stable combustion over a long period of time. The purpose is to maintain it.

Means for Solving the Problems The combustion apparatus of the present invention for solving the above problems includes a rectifier 11 having a plurality of rectifier holes in the throttle part of the burner body 2.
This is the position of the

Effects of the present invention With the above configuration, the mixed gas in the vaporizing cylinder is uniformly premixed in the vaporizing cylinder by the rectifier, and an even mixed gas is sent into the air chamber, with little fluctuation regardless of pump discharge synchronization. A stable flame is formed in the flame hole, and as a result, combustion noise is reduced and resonance noise is prevented, and safe and stable combustion can be achieved over a long period of time. Also, the combustion noise can be reduced by the silencing effect of the rectifier with respect to wind noise from the throat.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Parts that are the same as those in the conventional example will be given the same reference numerals, detailed explanations will be omitted, and only different parts will be explained. Reference numeral 10 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 plurality of holes 10a. Reference numeral 11 denotes a rectifier made of a non-combustible material such as ceramics, which is located in the throttle part 3 of the burner body 2 and communicates with the inside of the vaporizing cylinder 1 and the air chamber 2b (j). The rectifying hole size is b=1.5a≦.

In the above configuration, the liquid fuel injected into the vaporization cylinder 1 from the nozzle /L/9 is atomized by the combustion air supplied from the throat 8, and hits the high temperature inner wall of the vaporization cylinder 1 to become a mixed gas. This mixed gas is rectified through the rectifier 11 and supplied to the air chamber 2b, jetted out from the plurality of flame holes 2a, and ignited to generate a flame that closely adheres to the flame-holding tube 5. Then, the mixed gas is passed through the rectifier 11
Due to the resistance, the residence time in the vaporizer cylinder 1 becomes longer, and a mixed gas with a uniform concentration is obtained in the vaporizer cylinder 1, and the vibration of the flame is reduced because the pulsation in the discharge cycle of the pump etc. is suppressed. . In addition, the wind noise of the throat is reduced by the rectifier hole 11a of the rectifier 11°, and the amplification of flame vibration is suppressed.
Prevent resonance. Furthermore, the uniform mixed gas supplied from the rectifier 11 is evenly distributed over the entire air chamber 2b of the burner body 2 by the plurality of holes 10 & of the pressure equalizing plate 10, preventing uneven mixing and ejection, and producing a stable flame with less flame vibration. is obtained. Furthermore, this rectifier 11 functions to block large particles of the premixed gas jetted from the vaporization tube 1, and greatly reduces yellow flames etc. that are generated when large particles are ejected from the flame hole 2a. can do.

Effects of the Invention As described above, in the present invention, a rectifier made of a non-combustible material and having a plurality of rectifying holes is placed in the throttle section at the bottom of the burner body, which prevents resonance of combustion noise and reduces wind noise from the throat. It is possible to achieve uniformity and homogenization of the mixed gas distribution, and to form a flame with less oscillation. Therefore, combustion noise can be reduced and resonance noise can be prevented, and a safe and stable combustion state can be obtained over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a longitudinal 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... i-ized M, 2... burner body,
3...Aperture part, 8...Throat, 9.
... Nozzle, 10 ... Pressure equalization plate, 11 ...
... Rectifier, 11a... Rectification hole.

Claims (1)

[Claims] a vaporization cylinder that vaporizes liquid fuel and mixes it with combustion air;
A burner body 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 rectifier having a plurality of rectification holes is located in the constriction part. Liquid fuel combustion equipment.