JPH053852Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Industrial application field The invention is used in water heaters, hot air heaters, etc.
The present invention relates to a liquid fuel combustion device that vaporizes liquid fuel, premixes it with combustion air, and combusts it, and particularly relates to a liquid fuel combustion device that has a through hole formed in the bottom wall of the combustion cylinder and has electrical components attached thereto.

B. Prior art This type of liquid fuel combustion device was developed in U.S. Pat.
As disclosed in the publication, an inner cylinder having a large number of gas ejection holes on the peripheral wall, an outer cylinder disposed outside the inner cylinder with a space serving as a gas passage and an air storage chamber, A rotary carburetor tube disposed inside the inner tube with a fuel scattering gap between it and the bottom wall of the inner tube, a main blower tube facing into the vaporizer tube, and an outside of the main blower tube. A plurality of auxiliary blower tubes facing the bottom of the inner tube of the auxiliary blower tube, and a wind control plate that is erected from the bottom wall of the inner tube outside of these auxiliary blower tubes to regulate the flow of air from the auxiliary blower tubes. Furthermore, a communicating pipe passes through the bottom walls of the inner cylinder and the outer cylinder, and the upper part of this communicating pipe is covered with a shield, and an oil drain cylinder is connected to the lower end of the communicating pipe, and the bottom wall of the inner cylinder is The oil remaining on the top surface is dripped into the drain pan via the communication pipe and oil drain pipe.

C. Problems to be solved by the invention In the above liquid fuel combustion device, if even a slight gap is formed at the connection between the bottom wall of the inner cylinder and the outer cylinder and the communication pipe, for example by caulking, the internal The oil remaining on the upper surface of the bottom wall of the cylinder flows downward on the outer surface of the communicating pipe from the gap, and further travels from the gap between the bottom wall of the outer cylinder and the connecting pipe to the lower surface of the bottom wall of the outer cylinder,
Spreading outward, it drips into the oil sump of the drain pan. However, in this type of liquid fuel combustion device, the flame may enter the inside of the storage chamber from the gas injection hole, causing the temperature of the combustion tube to rise abnormally. Therefore, in order to prevent such abnormal combustion, a burner thermometer (for example, a bimetal thermometer) is installed on the lower surface of the bottom wall of the outer cylinder (taking advantage of the fact that when abnormal combustion occurs, the temperature of the bottom wall of the inner cylinder becomes higher than during normal use). If a thermometer is installed to stop combustion, the oil will be transmitted to the burner thermometer, then travel down the lead wire extending downward from the burner thermometer, and flow from this lead wire to a location other than the oil sump in the drain pan.
There was a problem with oil staining other parts.

In order to solve the above-mentioned problems, this invention extends the lead wire from the electrical component for preventing abnormal combustion attached to the bottom wall of the combustion cylinder in a downward slope, and connects the lower end of the slope to the oil sump of the drain pan. The present invention provides a liquid fuel combustion device that is positioned above the fuel tank and supported by a lead wire support member, and allows oil transmitted through the lead wire to drip from the lower end to the oil reservoir.

D. Means for solving the problems In order to solve the above problems, the present invention
Inner cylinder 1 and inner cylinder 1 having a large number of gas ejection holes 6 in B
A fuel scattering gap 〓 exists between the combustion cylinder 3 consisting of the outer cylinder 2, which is disposed with a space serving as a gas passage 4 and an air storage chamber 5 on the outside, and the bottom wall 1A of the inner cylinder 1. A rotary carburetor 7 disposed inside the inner cylinder 1, a fuel spray nozzle 11 facing the carburetor 7, a plurality of penetration pipes 16 penetrating the bottom wall of the combustion pipe 3, and a combustion pipe 7. In a liquid fuel combustion apparatus equipped with a drain pan 20 having an oil sump 24 provided below and receiving liquid fuel dripping from a through-tube 16, the temperature of the bottom wall of the combustion tube 3 is displayed on the lower surface of the bottom wall of the combustion tube 3. Electrical component 30 for preventing abnormal combustion that detects rise and stops combustion
The lead wires 40 and 41 connected to the electrical component 30 are provided with inclined portions 41A and 42A extending downward from the electrical component 30, and the inclined portions 41A and 4
The present invention provides a liquid fuel combustion device characterized in that it includes a lead wire support member 35 that positions the lower end of the lead wire support member 35 above the oil sump portion 24 of the drain pan 20.

E. Effect If there is a gap between the bottom wall of the combustion tube 3 and the through tube 16, for example, when combustion is stopped, liquid fuel remaining on the top surface of the bottom wall 1A of the inner tube 1 passes through the gap and the bottom of the outer tube 2. It reaches the wall 2A and spreads the lower surface of the bottom wall 2A, and further,
The liquid fuel is connected to lead wires 41 and 4 that extend downwardly from the electrical component 30 attached to the lower surface of the bottom wall 2A.
It is transmitted through the slope portions 41A and 42A of No. 2. Then, in order to drip from the lower ends of the inclined parts 41A, 42A to the oil sump part 24 of the drain pan 20, the inclined parts 41A, 42A
There is no fear that the liquid fuel transmitted through 2A will be transmitted or dripped to parts other than the drain pan 20.

F. Example Hereinafter, an example of the present invention will be described in detail based on the drawings.

In Fig. 1, a combustion cylinder 3 is constituted by an inner cylinder 1 and an outer cylinder 2, each having a cylindrical shape with a bottom, and a gas passage 4 and an air storage chamber 5 are formed between the inner cylinder 1 and the outer cylinder 2. A large number of gas ejection holes 6 are provided in the peripheral wall 1B of the cylinder 1.

A vaporizing cylinder 7 is provided in the center of the inner cylinder 1 and is open on the bottom wall 1A side of the inner cylinder 1. This vaporizing cylinder 7 is connected to a shaft 8 of a blowing motor (not shown) and is held rotatably. A fuel diffusion ring 9 is attached to the top wall 7A side of the vaporization cylinder 7 in the shape of a truncated cone having a fuel diffusion gap 10.
A fuel spray nozzle 11 is provided inside the fuel diffusion ring 9.
is coming. Further, an ignition device 12 is provided between the vaporizing cylinder 7 and the inner cylinder 11.

The inside of the vaporization tube 7 communicates with the gas passage 4 via the mixing tube 13, and a fuel scattering gap 14 is formed between the opening edge of the vaporization tube 7 and the mixing tube 13. A main blower tube 15 connected to the bottom wall 2A of the outer tube 2 and passing through the bottom wall 1A of the inner tube 1 faces inside the vaporizer tube 7. Further, at the bottom of the inner cylinder 1 outside the main blower cylinder 15, a plurality of through cylinders 16 for oil treatment, which penetrate the bottom walls of the inner cylinder 1 and the outer cylinder 2 and also serve as auxiliary blower cylinders, are exposed. .

The combustion air discharged from the penetrating tubes 16 is transferred to the bottom wall 1A of the inner tube outside of the penetrating tubes 16 into the vaporizing tube 7.
A wind control plate 17 is provided to regulate the flow along the wind direction.

In addition, a blower fan (not shown) is installed at the bottom of the outer cylinder 2.
A blower guide cylinder 19 for guiding combustion air is connected thereto. An annular drain pan 20 located below the through tube 16 is provided inside the air guide tube 19.
is provided. The shaft 8 near this drain pan 20 has an oil drain 21 for protecting the motor bearing.
A fuel discharge pipe 22 is provided at the bottom of the drain pan 20. Further, as shown in FIG. 1, a plurality of combustion air ports 23 are formed on the outer circumference of the drain pan 20 to allow combustion air to flow upward, and an oil reservoir is recessed inside the combustion air ports 23. A portion 24 is formed.

Further, 30 is an electrical component for preventing abnormal combustion, such as a burner thermostat, which is installed at a suitable location on the lower surface of the bottom wall 2A of the outer cylinder 2. This electrical component is installed inside the mounting bracket 31 as shown in FIG. It is housed through a spacer 32 and attached to the lower surface of the bottom wall 2A with a mounting bracket 31. Further, 35 is a lead wire support member (hereinafter referred to as support member) made of a metal rod, for example, and a mounting hole 36 is provided at one end of this support member 35.
A mounting portion 37 is formed, and a lead wire support portion 38 is formed at the other end with a curved tip.
The support member 35 is connected to the mounting hole 36 of the mounting portion 37.
A stopper 40 such as a screw is passed through the holder 40, and the holder 31 is attached to the bottom wall 31A of the mounting bracket 31 at an appropriate position. Furthermore, lead wires 41 and 42 extending from the electrical component 30 housed inside the mounting bracket 31 pass through the lead wire support portion 36 and are supported. Here, when the mounting bracket 31 housing the electrical component 30 inside is attached to the lower surface of the bottom wall 2A of the outer cylinder 2, the support member 35 is inclined downward from the attachment part 37 toward the lead wire support part 38, and The lead wire support section 38 is located above the oil reservoir section 24 of the drain pan 20. Therefore, the lead wires 41 and 42 extending from the electrical component 30 first extend downward toward the support portion 38 at inclined portions 41A and 42A.
After the lower end is supported by the support part 38 and bent, the remaining part is extended diagonally upward and outward from the air blowing guide tube 19 provided with the eyelet rubber 45.

When combusting the liquid fuel combustion device, when liquid fuel such as kerosene is sprayed from the fuel spray nozzle 11, the liquid fuel hits the fuel diffusion ring 9 that rotates together with the vaporizing tube 7 and becomes atomized. Then, the atomized liquid fuel advances upward along the inner circumferential wall of the fuel diffusion ring 9 due to centrifugal force, and is led to the outside of the fuel diffusion ring 9 through the fuel diffusion gap 10, after which the main blower tube It is mixed with combustion air from 15. These mixed raw gases are led out of the vaporization cylinder 7 through the fuel scattering gap 14. At this time, when the ignition device 12 is activated, the carburetor cylinder 7 inside the inner cylinder 1
Combustion takes place around.

When the vaporization tube 7 is sufficiently heated by the above-described primary combustion, the fuel atomized by the fuel diffusion ring 9 receives combustion heat in the vaporization tube 7 and is vaporized. After the vaporized fuel and the combustion air are sufficiently premixed through the mixing cylinder 13, gas passage 4, and storage chamber 5, they are discharged from the gas injection hole 6 on the circumferential wall of the inner cylinder 1 toward the vaporizer cylinder 7, and are Gasification combustion (secondary combustion) is performed within cylinder 1. Further, since the vaporization tube 7 is maintained at a high temperature by this combustion, the fuel is continuously vaporized.

In the liquid fuel combustion device configured as described above, when the ignition operation at the start of combustion is not performed well or after combustion is stopped, the bottom wall 1 of the inner cylinder 1
The unburned liquid fuel in A remains as recondensed liquid fuel. At this time, if a gap is formed at the connection part between the bottom wall 1A of the inner cylinder 1 and the bottom wall 2A of the outer cylinder 2 and the through cylinder 16, the bottom wall as shown by the arrow in FIG. The liquid fuel above 1A is transmitted from the gap to the lower surface of the bottom wall 2A via the outer surface of the penetrating cylinder 16. Then, the liquid fuel spreads on the lower surface of the bottom wall 2A, reaches the electrical component 30 in the mounting bracket 31, and is transmitted from the electrical component 30 to the lead wires 41, 42. Further, the liquid fuel is transmitted downward along the inclined portions 41A, 42A of the lead wires 41, 42. Then, it moves toward the lead wire support member 38 at the lowest end of the inclined portions 41A and 42A. The oil is then dripped from the bent portions of the lead wires 41 and 42 of the lead wire support portion 38 into the oil sump portion 24 of the drain pan 20 .
Note that the remaining portions of the lead wires 41 and 42 are bent from the lead wire support portion 38 and extend obliquely upward toward the blower guide tube 19, so that the liquid fuel does not flow from the lead wire support portion 38 toward the blower guide tube 19. It never flows.

The liquid fuel combustion device according to the present invention is configured as described above, and when the liquid fuel combustion device starts combustion, the unburned liquid fuel or the recondensed liquid fuel is used when the ignition operation is defective or when combustion is stopped. remains on the bottom wall 1A or 2A of the inner cylinder 1, and the liquid fuel on the bottom wall 1A or 2A passes through between the bottom wall 1A and the bottom wall 2A and the penetrating cylinder 16, and the liquid fuel passes through the space between the bottom wall 1A and the bottom wall 2A and the through cylinder 16, and the liquid fuel is transferred to the bottom surface of the bottom wall 2A. When the liquid fuel reaches and spreads, it is transmitted from the electrical component 30 to the lead wires 41 and 42 and reaches the bent part of the lead wire support part 38 above the oil sump part 24 of the drain pan 20, but this bent part Since it is the lowest end, the liquid fuel drips from the bent portion and is received by the oil reservoir portion 24 .
As a result, the lead wires 41 and 42 are connected to the electrical component 30.
It is possible to prevent the liquid fuel that has been transmitted to the drain pan 20 from being transmitted to or dripping onto parts below the drain pan 20, such as a fan case, and to prevent the liquid fuel from contaminating the parts or from the liquid fuel flowing from the parts below to other parts. or spread to the outside can be avoided.

(G) Effects of the invention The present invention is constructed as described above, and includes a lead wire extending from an electrical component for preventing abnormal combustion attached to the lower surface of the bottom wall of the outer cylinder, with an inclined portion extending downward from the electrical component. Since the lead wire was supported by the lead wire support member so that the lower end of the sloped part was located above the oil sump part of the drain pan, for example, the connection between the through pipe passing through the bottom wall of the combustion pipe and the bottom wall was If a gap occurs between the two, and unburned oil or recondensed oil passes through the gap and spreads to the lower surface of the bottom wall when the ignition is malfunctioning when starting combustion or when combustion stops, etc. The oil transmitted from the electrical component to the lead wire is allowed to drip from the lower end of the inclined portion of the lead wire to the oil reservoir, thereby preventing the oil from being transmitted to or dripping from parts other than the drain pan. As a result, we installed an electrical component on the lower surface of the bottom wall of the combustion tube to prevent abnormal combustion, which detects the temperature rise on the bottom wall of the combustion tube and stops combustion. It is possible to prevent oil from spreading to other parts through the lead wires, contaminating those parts, or leaking oil to the outside.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
Figure 1 is a sectional view of the main parts of the liquid fuel combustion device, Figure 2 is a sectional view of the section taken along line A-A of the sectional view shown in Figure 1, and Figure 3 is the mounting structure and leads for electrical components. FIG. 2 is a schematic perspective view showing a wire support structure. 1...Inner cylinder, 1A...Bottom wall, 2...Outer cylinder, 2A
...Bottom wall, 3...Combustion tube, 4...Gas passage, 5...
... Air storage chamber, 7 ... Vaporization tube, 11 ... Fuel spray nozzle, 16 ... Penetration tube, 20 ... Drain pan, 24
...Oil reservoir portion, 30...Electrical component, 35...Lead wire support member, 41, 42...Lead wire, 41
A, 42A... Slanted part.

Claims (1)

[Scope of utility model registration request] A combustion cylinder consisting of an inner cylinder having a large number of gas ejection holes on a peripheral wall, an outer cylinder disposed outside the inner cylinder with a space serving as a gas passage and an air storage chamber, and a bottom of the inner cylinder. A rotary carburetor is disposed within the inner cylinder with a fuel scattering gap between the wall and the fuel spray nozzle faces into the vaporizer, and a fuel spray nozzle is inserted through the bottom wall of the combustion cylinder. In the liquid fuel combustion device, the liquid fuel combustion apparatus includes a plurality of through-holes, and a drain pan provided below the combustion tube and having an oil reservoir portion for receiving oil dripping from the through-hole. An electrical component for preventing abnormal combustion is provided that detects a temperature rise on the bottom wall of the cylinder and stops combustion, and a lead wire connected to the electrical component is provided with an inclined portion extending downward from the electrical component. A liquid fuel combustion device comprising a lead wire support member whose lower end is positioned above the oil sump portion of the drain bun.