JPS6012092B2 - atomization device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an atomizer that atomizes a liquid and mixes the rhombic particles with gas to form a multiphase fluid, and particularly for atomizing liquid combustion in a liquid fuel combustion device. With,
The present invention relates to a liquid fuel atomization device that mixes the mist with combustion air and sends it to a combustion section as a multiphase fluid.

In hot water boilers, hot air heaters, etc. that burn liquid fuel and use the resulting thermal energy for hot water supply, space heating, and other purposes, the fuel is atomized into atomized particles in order to improve combustion characteristics. A method that mixes fuel with air and burns it is often used.

Various methods have been used in the past to achieve atomization of liquid fuel, but all of them have complex structures and often have various disadvantages, including manufacturing accuracy and manufacturing cost.

Figure 1 shows a typical airflow impact type mist nozzle.

The liquid fuel discharged from the oil nozzle 1 collides with the air swirled by the swirling blade 2 through the air nozzle 3 to create a thin oil film, and this oil and pus is further atomized by the air jetted from the outer mixing nozzle 4. . This configuration has disadvantages such as a complicated nozzle structure and a need for a high-pressure blower to supply combustion air. FIG. 2 shows, as another conventional example, a rotary burner that atomizes liquid fuel by rotating an atomizing node at high speed.

The liquid fuel supplied from the main shaft hollow part 12 and discharged to the inner surface of the rhomboid tube 13 sticks to the inner surface due to the rotation of the atomizing tube and flows out toward the tip. It mixes with the air sent by and becomes atomized. This footrest also had drawbacks such as a complicated structure, a long main axis, and a large space required in the direction of the mouse. In view of the above-mentioned drawbacks of the conventional technology, the present invention aims to have a very simple structure and to obtain good fogging characteristics, by adding the hydrodynamic force of the vortex blower to the air transport, and further It is also intended to be used to atomize and atomize liquid fuel.

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

In FIGS. 3 and 4, 21' is a whirlpool type blower, and is mainly composed of a motor 22, an impeller 23 attached to the rotating shaft of the motor 22, and a casing 24.

The impeller 23 is approximately disk-shaped, and a blade rib 25 is formed on its peripheral edge, which is composed of an annular lip 25a and a number of lips 25b extending radially outward from the annular lip 25a.
The green U-shaped space surrounded on three sides by the blade grooves 26 is defined as the blade groove 26. Furthermore, a boss 27 is located in the center of the impeller 23.
A flat plate is provided between the boss 27 and the annular rib 25a. 28 is the post 27 and the annular rib 2
These are through holes that penetrate through the ribs 25 so as to reach the blade grooves 26 from the spaces 29 with the ribs 5a.

In addition, the casing 24 is configured such that the portion facing the central portion of the impeller 23 is close to it, and the portion facing the green peripheral portion of the impeller 23 is separated from the casing passage 30.
An air suction port 31 is provided on a part of the periphery, and a discharge port 32 is provided at a position approximately one turn from this inlet port 31 in the rotational direction of the impeller 23 (direction a in FIG. 4). 33 is a liquid fuel supply pipe whose tip passes through the casing 24 and closes at a position near the blade lip 25 in the space 29 facing the impeller 23.

In such a configuration, the impeller 23 is moved in the direction indicated by the arrow a in FIG.
When the blade groove 26 is rotated in the direction shown in FIG. It goes in and out and is discharged from the discharge port 32 while increasing the pressure.
On the other hand, the liquid fuel supplied to the space 29 through the liquid fuel supply pipe 33 passes through the through hole 28 due to centrifugal force, becomes a substantially constant particle size, and is distributed in the blade groove 26, and the above-mentioned circulation flow The gas is further atomized (mixed with air by the fluid force that causes it) to become a combustible gas, and is transferred from the discharge port 32.
In the above configuration, as shown in FIGS. 5 and 6, if a groove 34 is formed in the main plate of the impeller near the inner end surface of the lip 25, the mist characteristics of the liquid fuel can be further improved. can.

As described above, according to the present invention, liquid such as liquid fuel can be effectively sprayed with a very simple configuration without using special parts such as a sprayer or a swirler as in the past.

Furthermore, since the configuration is simple, the resistance to blowing air etc. is also extremely small, and as a result, the blowing function is also smaller than that of conventional products, making it possible to downsize the equipment. It enters the blade groove through the through hole in the rib, and moves in and out between the blade groove and the casing passage many times as the impeller rotates, so the atomization properties are also very good.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view showing a typical conventional air flow impact type spray nozzle, Fig. 2 is a partial sectional view showing a typical conventional rotary burner, and Fig. 3 is an embodiment of the present invention. 4 is a schematic cross-sectional plan view thereof, FIG. 5 is a plan view showing an impeller in another embodiment, and FIG. 6 is a cross-sectional side view thereof. 21... Eddy current blower, 22... Motor,
23... Impeller, 24... Casing, 25... Vane rib, 26... Vane groove, 2
7...Boss, 28...・Through hole, 29・
...Space, 30...Casing passage, 31...Intake port, 32...Discharge port, 33...Liquid fuel supply pipe (liquid flow path). Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A whirlpool type blower having a gas suction port and a gas discharge port, and a liquid supply pipe for supplying liquid toward an impeller of the whirlpool type blower, the impeller having a peripheral edge thereof. It has a large number of blade grooves formed by the blade ribs, and a through hole is provided from the space between the blade rib and the boss to penetrate the blade rib and reach the large number of blade grooves, and the tip of the liquid supply pipe is connected to the blade. An atomizing device characterized by opening toward the impeller in the space between the vane rib and the boss of the car. 2. The atomization device according to claim 1, wherein the liquid is liquid fuel and the gas is combustion air, constituting a liquid fuel atomization device of a liquid fuel combustion device.