JPS6324333Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a liquid fuel combustion device that vaporizes liquid fuel, mixes it with combustion air, and performs combustion.

Structure of a conventional example and its problems A conventional liquid fuel combustion apparatus of this type is structured as shown in FIG. That is, a heater is installed in the lower circumferential direction of the side surface of the bottomed vaporizing cylinder, and a mixing plate having a diaphragm shape is installed on the open surface. Furthermore, a blower pipe is connected to the bottom of the carburetor cylinder, and combustion air is sent into the carburetor cylinder from the blower fan via an air guide, and a fuel injection nozzle is passed through the blower pipe and horizontally into the carburetor cylinder from the air guide. Looking in the direction. The fuel is vaporized and mixed with combustion air in the vaporization cylinder, and then supplied to the upper combustion section where it is combusted.

In this configuration, by supplying fuel and combustion air from the bottom of the vaporization cylinder, the volume of the vaporization chamber, that is, the depth of the vaporization cylinder, can be reduced, making it possible to speed up the temperature rise of the vaporization cylinder during ignition. At the same time, it has become possible to place a high-temperature heater in the area where the fuel is ejected from the nozzle and directly hits the vaporization wall surface. However, at the tip port 7a of the fuel injection nozzle, combustion air (indicated by arrow A) tends to flow in an undefined direction, and under the influence of this, the fuel
There were problems such as backflow along the outer periphery of the fuel injection nozzle, outflow to the outside of the vaporization cylinder, backfire combustion, and generation of odor.

Purpose of the invention The present invention is a solution to such conventional problems, and the purpose is to perform fuel injection reliably and satisfactorily.

Structure of the invention In order to achieve this objective, the invention provides an air control plate below the tip of the fuel injection nozzle to prevent combustion air supplied from below from flowing directly near the tip of the fuel injection nozzle. It is something.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on FIG. 2.

is a bottomed vaporizing cylinder, a heater is installed in the circumferential direction at the lower side of the side, and a mixing plate having a diaphragm shape is installed on the open surface. Furthermore, a blower pipe is connected to the bottom of the carburetor cylinder, and combustion air is sent into the carburetor cylinder from the blower fan via an air guide, and a fuel injection nozzle is passed through the blower pipe and horizontally into the carburetor cylinder from the air guide. Looking in the direction. The fuel is vaporized and mixed with combustion air in the vaporization cylinder, and then supplied to the upper combustion section where it is combusted. At this time, an air control plate is provided below the tip a of the fuel injection nozzle to prevent combustion air supplied from below from flowing directly near the tip a.

With this configuration, the vaporization tube is heated by supplying electricity to the heater in the vaporization tube. Thereafter, combustion air is introduced into the vaporization cylinder by driving a blower fan provided through the blower pipe. Subsequently, fuel is injected into the vaporization cylinder from the fuel injection nozzle. The fuel is influenced by temperature on the wall surface of the vaporization cylinder and turns into vaporized gas, which passes through the constriction section of the mixing plate placed at the top and flows out to the combustion section. At this time, the fuel vaporized gas is mixed with combustion air to form a combustion flame in the combustion section as a premixture. At this time, the combustion air from below does not flow directly into the vicinity of the tip a of the fuel injection nozzle due to the air control plate. As a result, the fuel hardly flows backward from the tip a of the nozzle along the surroundings.

Here, the flow of fuel will be explained in detail with reference to FIG. 3 together with the flow of combustion air.

A is affected by the fact that the combustion air tends to flow in an undefined direction at the tip of the conventional nozzle.
Due to the surface tension and wettability of the fuel, fuel tends to accumulate at the tip, causing a phenomenon called fuel backflow. However, in the case where the air control board according to this embodiment is provided below the nozzle tip as shown in b, so that the combustion air does not flow directly near the nozzle tip, the influence of the flow of combustion air in an undefined direction Therefore, the fuel runs out very well, and there is almost no fuel accumulation.

Effects of the Invention According to the liquid fuel combustion device of the present invention, an air control plate is provided below the tip of the fuel injection nozzle to prevent combustion air supplied from below from flowing near the tip of the fuel injection nozzle. This prevents the fuel from flowing backwards along the outer circumference of the fuel injection nozzle, and reliably prevents the fuel from flowing out of the vaporization cylinder, backfire combustion, and generating odors, which was the case in the past. Moreover, the configuration is easy.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional liquid fuel combustion device, FIG. 2 is a sectional view showing a liquid fuel combustion device according to an embodiment of the present invention, and FIGS. 3a and 3b show the flow of fuel at the nozzle tip. FIG. 3 is a sectional view showing the flow of combustion air. 1... Carburizer cylinder, 4... Air pipe, 7... Fuel injection nozzle, 9... Air control board.

Claims (1)

[Scope of utility model registration request] A blast pipe equipped with a combustion air supply means and a fuel supply means is connected to the bottom of a bottomed vaporization cylinder heated by a heater, and a fuel injection nozzle is horizontally inserted into the vaporization cylinder as the fuel supply means. This liquid fuel combustion device is equipped with an air control plate below the tip of the fuel injection nozzle so that the combustion air supplied from below does not flow directly near the tip of the fuel injection nozzle.