JPH0232964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a liquid fuel combustion device, in particular a liquid fuel combustion device in which combustion air swirls and flows into a combustion chamber through a swirl guide hole in an end plate of a combustion tube. The present invention relates to a liquid fuel combustion device.

[Description of Prior Art] It is known that in a small evaporative liquid fuel combustion device that performs high-load combustion, combustion efficiency can be increased by generating a swirl within the combustion chamber. In order to generate swirl within the combustion chamber, conventionally, an air introduction pipe for supplying combustion air was eccentrically attached to the combustion tube forming the combustion chamber.

Such a conventional liquid combustion device is shown in FIGS. 1 and 2. In the combustion tube 10 that forms a combustion chamber therein, a combustion air introduction pipe 12 is welded and fixed so that combustion air is introduced into an eccentric position inside the combustion tube 10 . A motor 14 and a motor 14 are connected from this combustion air introduction pipe 12 into the combustion cylinder 10.
Air is blown in by a blower 24 comprising a rotor 16 driven by a rotor 16 and a casing 22 in which an air intake port 18 and an air discharge port 20 are formed. An ignition plug attachment tube 27 having a fuel introduction pipe 25 is fixed to the combustion tube 10, and an ignition plug 26 is detachably attached to the ignition plug attachment tube 27. The fuel introduction pipe 25 enters the combustion pipe 10 through the spark plug mounting pipe 2.
Fuel is supplied via step 7. Since the combustion air introduction pipe 12 is installed eccentrically with respect to the combustion chamber 10, a swirl as shown by the arrow 28 is generated within the combustion tube 10.

[Problems to be solved by the invention] In the liquid fuel combustion device having the conventional structure as described above, if the combustion air introduction pipe 12 is not correctly attached to the combustion tube 10, that is, if the combustion air introduction pipe 12 is In the case of the state shown by the broken line 12a in FIG. 2, there was a problem in that the flow of the swirl 28 also became abnormal and the combustion performance deteriorated.

Furthermore, in order to uniformly weld the position of the opening end of the combustion air introduction pipe 12 within the combustion cylinder 10 and the orientation of the combustion air introduction pipe 12 with respect to the combustion cylinder 10 without variation, a complex welding jig and a complicated welding jig are required. This required advanced welding techniques. In reality, it has been difficult to perform welding with enough uniformity to avoid variations in combustion performance.

[Purpose of the invention] The purpose of the invention is to provide a liquid fuel combustion device that has reliable combustion performance without requiring complicated welding jigs or advanced welding techniques.

[Means for solving the problem] The liquid fuel combustion device of the present invention has a combustion air swirling guide opening opened at an eccentric position of an end plate on the upstream side of a combustion cylinder forming a combustion chamber, and An air guide is provided near the mouth for determining the flow direction of the combustion air passing therethrough.

[Operation] An air guide is provided at an eccentric position of the end plate, and combustion air is introduced into the combustion tube along the air guide. The direction of this air guide is set to generate swirl to increase combustion efficiency.

[Example] Next, the present invention will be explained based on the drawings. Third,
FIG. 4 is a cross-sectional view of a liquid fuel combustion device according to the present invention, FIG. 4 is a cross-sectional view taken from - in FIG. The blower 32 for sending combustion air to the combustion tube 30 has an air intake port 34.
and a casing 38 having an air discharge port 36 formed therein.
, a motor 40 , and a rotor 42 driven by the motor 40 to move air from the air inlet 34 to the air outlet 36 . an end plate 44 provided at one end of the combustion tube 30;
has an annular skirt portion 46 at its outer edge, and the tip of the skirt portion 46 is in contact with the casing 38 of the blower 32. The end plate 44 has an annular skirt portion 4 on the side facing the blower 32.
A turning guide 48 is fixed on the inner side of 6.
The space sandwiched between the skirt portion 46 and the turning guide 48 forms an arcuate air passage 50.
One end of this air passage 50 communicates with the air outlet 36 . At the other end of the air passage 50, a turning guide port 52 is formed in the end plate 44. An air guide 54 (FIG. 5) that allows combustion air to easily flow out from the swirl guide port 52 is placed on the end plate 44 near the swirl guide port 52.
is provided. The air guide 54 forms a predetermined angle with the end plate 44 so that the direction of inflow of combustion air into the combustion cylinder 30 is a predetermined direction, and the inflow direction is in the circumferential direction of the end plate 44. It is formed to have a component. As a result, a swirl flow that requires a circumferential component within the combustion tube 30 as shown by the arrow 56 is formed in the combustion tube 30, thereby improving combustion performance.
This air guide 54 is provided so as to protrude on the same side as the skirt portion 46 of the end plate 44, that is, on the side opposite to the inside of the combustion tube 30.

This air guide 54 is connected to the end plate 4.
It may be attached by welding or the like in accordance with the turning guide port 52 opened in the flat portion of the holder 4. In this case, a combustion tube 30 that is reliable in terms of combustion performance can be produced using a simple jig and without the need for advanced welding techniques.
can be created. Furthermore, the air guide 54 can be formed simultaneously when the turning guide port 52 is formed in the end plate 44 by press working.

End plate 44 shown in FIGS. 3 to 5
Although the air guide 54 formed in the air guide 54 is made to protrude to the side opposite to the combustion chamber 30, the same objectives in terms of combustion performance and processing can be achieved even if the air guide 54 is made to protrude to the side of the combustion tube 30. This embodiment is shown in FIGS. 6 and 7. An end plate 64 having a skirt portion 60 on its outer periphery and a turning guide 62 attached inside the skirt portion 60 is provided with a turning guide port 66 . The outflow direction of the air placed at the position of the rotation guide port 66 is determined. Air guide 6
8 is attached to the side opposite to the skirt portion 60.
Even with such a configuration, the same advantages in combustion performance and processing steps as in the above embodiment can be obtained.

Next, the flow of air in the liquid fuel combustion apparatus configured as above will be explained. Air sucked in from the air intake port 34 by driving the blower 32 is blown out from the air discharge port 36 and guided to the rotation guide port 52 through the air passage 50. As shown in FIGS. 3 to 5, when the air guide 54 is located on the opposite side of the combustion tube 30, the air guide 54 controls the direction of combustion air before passing through the swirl guide port 52. given in a given direction. Further, as shown in FIGS. 6 and 7, when the air guide 68 is located on the side of the combustion tube 30, the inflow direction of the combustion air is given to a predetermined direction after passing through the swirl guide port 66, and the combustion air is Swirl 56 occurs inside 30. The swirl 56 is uniform in manufacturing due to the above-mentioned structure, so that there is no variation from product to product, and good combustion performance is guaranteed.

[Effects of the invention] According to the liquid fuel combustion device of the invention configured as described above, an air guide is formed in the end plate constituting the end face of the combustion cylinder, with the inflow direction of combustion air being in a predetermined direction. This is how it was done. Since this end plate can be manufactured with uniform precision, a combustion device with reliable combustion performance can be manufactured.

Furthermore, the present invention eliminates the need for welding the introduction pipe for introducing combustion air into the combustion cylinder from the outside of the combustion cylinder, which is required in the past, reducing the number of processing steps and making it possible to significantly reduce costs.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of a conventional liquid fuel combustion device, Figure 2 is a sectional view taken along the - line in Figure 1, Figures 3 and 4.
The figure is a longitudinal cross-sectional view of the liquid fuel combustion device according to the present invention.
FIG. 5 is an enlarged sectional view taken along the line - in FIG. 4, FIG. 6 is a front view showing another embodiment of the end plate according to the present invention, and FIG. FIG. 30... Combustion tube, 32... Blower, 44... End plate, 46, 60... Swivel guide, 5
2, 66...Turning guide port, 54, 68...Air guide.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A combustion tube that burns liquid fuel to generate combustion gas inside the combustion tube, a blower that sends combustion air into the combustion tube, and a connection between the inside of the combustion tube and the blower. In an evaporative liquid fuel combustion apparatus having a partitioning end plate, a swirl guide port for introducing combustion air from a blower is provided at an eccentric position of the end plate, and a swirl guide port is provided near the swirl guide port of the end plate. A liquid fuel combustion device characterized by comprising an air guide for specifying an inflow direction of combustion air flowing into the combustion cylinder from a guide port. (2) The liquid fuel combustion device according to claim 1, wherein the air guide is provided on a surface of the end plate opposite to the combustion tube. (3) The liquid fuel combustion device according to claim 1, wherein the air guide is provided on the combustion cylinder side surface of the end plate. (4) The evaporative liquid fuel combustion device according to claim 1, wherein the air guide is press-molded integrally with the end plate. (5) The liquid fuel combustion device according to claim 1, wherein a turning guide is provided on one side of the end plate for directing air sent from the blower toward the air guide.