JPS59112109A - combustion device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion device used in small household water heaters and heating equipment (C).

Conventional Structure and Problems Conventionally, this type of combustion apparatus has been structured as shown in FIG. That is, the atomized particles from the nozzle 1 are mixed with the swirling air flow from the lower swirling nozzle 8 of the vaporization tube 5 and burned by yellow flame diffusion, and the combustion heat causes a temperature rise on the surface of the vaporization tube 6 and a combustion flame. Due to particle collisions and radiant heat, the mixture and gas are promoted in the premixing region 11 formed between the vaporizing tube 5 and the auxiliary combustion tube 9, and the swirling air nozzle 8 in the upper part of the vaporizing tube 5 is instantly generated after ignition.
However, the mixing characteristics of the atomized particles and the swirling air flow in the premixing region 11 are such that the mixture is formed into a spiral mixture along the swirling air flow, and in a spiral shape. Although the particles rise and shift to vaporization combustion, because the nozzle 1 position is aligned on the same line with the center position of the air cylinders, the particles at a constant spray pressure from nozzle 1 become swirling airflow. When they collide, some particles on the windward side of the swirling flow from the center of the air cylinder 5 and the center of the nozzle 1 become a colliding vortex, forming a partially negative pressure area, preventing a swirling mixed airflow, and promoting mixing. As a result, a uniform gas mixture cannot be obtained all around the premixing region 8, and combustion characteristics deteriorate not only during yellow flame diffusion combustion at the initial stage of combustion, but also during steady vaporization combustion.

OBJECTS OF THE INVENTION The present invention eliminates such conventional drawbacks by making the mixing of the swirling air flow from the carburetor cylinder and the atomized particles from the nozzle uniform over the entire premixing region, and improving the mixing speed at the initial stage of combustion. , and good combustion characteristics can be obtained in steady combustion.

Structure of the Invention In order to achieve this object, the present invention includes an atomization means using pressure spray for supplying fuel to the combustion chamber, and a large number of swirling air jets provided in the central inner core part of the combustion chamber and on the side wall. The fuel atomizer is provided with a vaporizing cylinder having holes, and the fuel atomizing means is eccentric to the center position of the vaporizing cylinder toward the side of the swirling air jet flow direction from the vaporizing cylinder.

With this configuration, the swirling air flow in the premixing region and the atomized particles are mixed uniformly over the entire circumference, and good combustibility can be obtained.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes a nozzle as a misting means, to which an electromagnetic pump 2 is connected. 3 is nozzle 1, ignition device 4
This is a support cylinder incorporating a

Reference numeral 6 denotes a vaporizing cylinder erected in communication with a wind cylinder 7 for supplying combustion air from the blower 6, and a large number of swirling air injection holes 8 are provided around the side wall of the vaporizing cylinder 6. 9 is located around the carburetor cylinder 6,
Openings 10 are provided to prevent particles ejected from the nozzle 1 from colliding with each other.
A premixing region 11 is formed between the cylindrical auxiliary combustion cylinder and the vaporization cylinder 6.

Reference numeral 12 denotes a combustion chamber, and the carburetor cylinder 5 is installed upright in the concentric portion of the combustion chamber.

In the above configuration, fuel particles are pressurized by the electromagnetic pump 2 and are sprayed from the nozzle 1 into the premixing region 11 toward the vaporization tube 5 through the opening 10 of the auxiliary combustion tube 9 in the combustion chamber 12 . On the other hand, combustion air is supplied into the vaporization cylinder 5 via the blower 6 and the wind cylinder 7, and is ejected from the swirling air outlet 8 on the side wall of the vaporization cylinder 5 in the form of a high-speed swirling flow. In the mixing process of these fuel particles and combustion air, the spray nozzle 1 directs swirling air from the vaporization tube 5 to the center position of the vaporization tube 6 with respect to the combustion chamber 12 and the vaporization tube 5 provided in the central inner core part. Because it is located eccentrically (in the direction of the jet flow), the swirling air flow from the carburetor cylinder 5 and the fuel particles from the nozzle 1 form a partial negative pressure region in the premixing region 11 due to the colliding vortex flow. It is possible to promote uniform mixing in the entire circumference of the premixing region 11 along the swirling air flow, and to improve the yellow flame diffusion combustion characteristics at the lower swirling air nozzle 8 of the vaporization tube 5 after ignition, and , good steady vaporization blue flame combustion characteristics can be obtained due to the temperature rise of the auxiliary combustion tube 9 and the radiant heat of the combustion flame.

Effects of the Invention The present invention provides a fuel atomizer that is eccentrically provided in the direction of the swirling air jet flow from the carburetor with respect to the center of the carburetor. (1) A clean combustion burner with less carbon oxide and soot can be provided during combustion ignition, steady combustion, and extinguishing.

(2) The flame is evenly distributed, and low-frequency combustion noise can be reduced.

(3) There is no temperature unevenness in the combustion auxiliary materials such as the carburetor tube and the auxiliary combustion tube, and the reliability of the heat-resistant material can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
A cross-sectional view taken along the line A--A in the figure, and FIG. 3 is a cross-sectional view showing a conventional example. 1...nozzle, 5...carburizer cylinder, 8...
...Swirling air outlet, 12... Combustion chamber. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure? 13 Figure 2

Claims (1)

[Claims] Atomization means using a nozzle for supplying fuel to the combustion chamber, and a vaporization tube provided in the central inner core part of the combustion chamber and having a large number of swirling air injection holes on the side wall, and the fuel atomization means using the nozzle. A combustion device in which the means is provided eccentrically to the side of the vaporizer cylinder in the direction of the swirling air jet flow with respect to the center position of the vaporizer cylinder.