JPH0335953Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to the improvement of a pot-type oil combustion device.

<Prior art> In conventional systems that supply fuel in a level regulator to a pot burner via an electromagnetic pump, there is an oil supply pipe that connects the pot burner and the electromagnetic pump.
A return pipe connected to a constant oil level gauge is connected to the lowest air hole of the pot burner, so that even if only the electromagnetic pump is driven due to ignition error, fuel will not overflow from the pot burner and the oil will remain constant. A device that can be returned to a side container is already known, as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 58-158913.

<Problems to be solved by the invention> This conventional type has many connections in the oil pipe, and all of the connected pipes are thin tubes like the conventional one, so the resistance inside the pipe is large and the air flows into the pot burner. It has the disadvantage that it is difficult to escape to the side, and bubbles tend to form in the oil pipe when igniting or changing the heating power, resulting in unstable combustion and poor combustion.

<Means for solving the problem> This invention focuses on this point, and in order to eliminate the above drawback, it is possible to use a constant oil level device that maintains the oil level lower than the lowest air hole of the pot burner via an electromagnetic pump. In addition to supplying fuel to the pot burner, one end of a return pipe, the other end of which is connected to an oil level regulator, is connected to a lower point than the lowest air hole in the middle of the oil pipe connecting this electromagnetic pump and the pot burner. In the
The present invention relates to a pot-type oil combustion apparatus in which the connecting portion between the oil sending pipe and the return pipe is expanded wider than the other portions, and blowing pressure is applied to at least the fuel surface within the oil sending pipe.

<Function> Through a well-known combustion operation, the electromagnetic pump 11 supplies fuel in the oil level regulator 8 to the pot burner 1 via the oil feed pipe 12, and outdoor air is supplied to the pot burner 1 from the combustion fan 4 as combustion air. At the same time, air is applied to each fuel level in the oil supply pipe 12 and the oil level regulator 8 through the pressure pipe 15, and if ignited by an igniter (not shown) or the like, a good This is what starts combustion.

Since the air in the oil feed pipe 12 at the start of combustion is the one in which the connecting portion 14 is expanded compared to the present invention,
The resistance inside the pipe is also reduced, and a sufficient gap for air circulation is secured between the circulating fuel and the inside of the oil pipe 12. Air can be exchanged with fuel well through this gap, and the oil pipe Combined with the fact that air blowing pressure is applied to the fuel surface in the burner 12, the air is smoothly and quickly discharged to the pot burner 1 side, and stable and good combustion can always be obtained.

<Embodiment> In 1, a plurality of air holes 3 are formed in several stages in a peripheral wall of a pot burner provided at the inner lower part of a combustion outer cylinder 2.

4 is a combustion fan that supplies combustion air to the pot burner 1 through the air passage 5;
The combustion air is sucked in through the exhaust pipe 7, and the exhaust gas after combustion is pushed outside through the exhaust pipe 7.

8 is a fuel tank 10 placed on an oil pan 9
It is a constant oil level device that always stores a certain amount of fuel supplied from the pot burner, and the oil pressure is set lower than the air hole 3 at the bottom of the pot burner.
Inner fuel is sequentially supplied to the pot burner 1 via the pot burner 2.

Reference numeral 13 is a return pipe whose one end is connected to the lower part of the oil level regulator 8 and the other end is connected to a position lower than the lowest air hole 3 of the pot burner 1 in the middle of the oil feed pipe 12, and only the electromagnetic pump 11 is driven due to ignition error etc. The purpose is to return the fuel to the oil level regulator 8 without overflowing the fuel from the pot burner 1.

Furthermore, the connecting portion 14 of the oil feed pipe 12 to which the return pipe 13 is connected is expanded nearly twice as wide as the other portions to ensure smooth air circulation and prevent the generation of bubbles.

Reference numeral 15 denotes a pressure pipe that communicates with the air passage 5 and applies the air blowing pressure of the combustion fan 4 onto each fuel level of the oil level regulator 8 and the oil feed pipe 12.

Next, to explain the operation, by using a well-known combustion device, an electromagnetic pump 11 supplies fuel in a level regulator 8 to a pot burner 1 via an oil feed pipe 12, and a combustion fan 4 supplies outdoor air to the pot burner 1 as combustion air. At the same time, air is applied to each fuel level in the oil supply pipe 12 and the oil level regulator 8 through the pressure pipe 15, and then ignited by an igniter (not shown) or the like. For example, good fuel is what starts.

Since the air in the oil pipe 12 at the start of combustion is caused by expanding the connection part 14 more than the other parts, the resistance inside the pipe is also reduced, and there is a gap for air circulation between the flowing fuel and the inside of the oil pipe 12. As a result, air can be sufficiently exchanged with fuel through this gap, and combined with the fact that air pressure is applied to the fuel surface in the oil pipe 12, the air can be exchanged smoothly and quickly. is discharged to the pot burner 1 side, and stable and good combustion can always be obtained.

Of course, even though combustion has not started due to ignition error etc., the electromagnetic pump 11 continues to drive and before the fuel overflows from the pot burner 1, it is connected to the oil feed pipe 12 at a lower value than the air hole 3 at the bottom of the pot burner 1. The fuel is returned to the leveling device 8 through the return pipe 13, and then the fuel supplied from the electromagnetic pump 11 is sequentially distributed to the leveling device 8, so there is no possibility of fuel overflowing from the pot burner. It is extremely safe as it can be prevented from occurring, and re-ignition is easy.

<Effects of the invention> In short, this invention has the advantage that the oil supply pipe 12 and the return pipe 13
Since the connection part 14 connected to the oil pipe is expanded wider than the other parts and air pressure is applied to at least the fuel surface in the oil pipe 12, resistance inside the pipe is also reduced and air is created between the flowing fuel and the inside of the oil pipe. Sufficient clearance is secured for circulation, allowing smooth exchange of air and fuel, and since air pressure is constantly applied, air is discharged reliably and quickly, ensuring stable and good combustion at all times, and the return pipe is removed. Problems caused by the provision can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a simplified cross-sectional view of a pot-type oil combustion device to which an embodiment of the invention is attached, and FIG. 2 is an enlarged cross-sectional view showing the connecting portion, which is the main part, expanded. 1...Pot burner, 3...Air hole, 8...Oil level regulator, 11...Electromagnetic pump, 12...Oil pipe,
13...Return pipe, 14...Connection part.

Claims (1)

[Scope of utility model registration request] Fuel is supplied to the pot burner 1 via an electromagnetic pump 11 from a constant oil level device 8 that maintains an oil level lower than the air hole 3 at the lowest stage of the pot burner 1, and a feeder connecting the electromagnetic pump 11 and the pot burner 1 is provided. In the oil pipe 12, one end of a return pipe 13 whose other end is connected to the oil level regulator 8 is connected to a lower value than the lowest air hole 3 in the middle of the oil pipe 12, and the oil sending pipe 12 and the return pipe 13 are connected. A pot-type oil combustion device characterized in that a connecting portion 14 is made wider than the other portions, and that blowing pressure is applied to at least the fuel surface within the oil feed pipe 12.