JPS6344650Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a combustion device for heating, etc., which uses oil as fuel and is called outdoor feed/exhaust combustion (FF combustion). This invention relates to a device for preventing backflow of raw gas indoors using exhaust gas outflow resistance in the device.

[Technical background of the invention]

This kind of F/F combustion type combustion device that has already been proposed has a strong wind applied to the exhaust port of the supply/exhaust stack that discharges exhaust gas outdoors during combustion, and depending on the air blowing conditions, the exhaust resistance increases, exhaustion becomes insufficient, and as a result, the internal pressure of the burner device increases, and the raw gas (unburned gas) in the burner device returns to the oil tank through the reflux pipe (return pipe). Furthermore, there is a risk that these raw gases may leak into the room from the small air exchange holes drilled in the fuel filler cap, producing a bad odor.

That is, this kind of supply/exhaust type heating combustion device that has already been proposed has the following structure, as shown in FIG.
A case body 2 having a box-shaped hot air outlet is installed on a flat stand 1.
A fuel tank (oil tank) 4 having a fuel filler cap 4a containing petroleum 3 as fuel in the lower part 2a of the tank.
The fuel 3 in the oil tank 4 is pumped up by a fuel pump 5 which is an electromagnetic pump attached above the oil tank 4, and is pumped from the fuel pump 5. Fuel is supplied to a burner device 6 equipped with a burner outer cylinder 6a installed on the substrate 2b directly above the fuel pump 4, and is ignited by a spark plug 7 attached to the burner device 6, thereby causing the burner to ignite. The fuel for the device 6 is supplied from a combustion air fan (air supply fan) 9 driven by a drive motor 8 that is coaxial with an exhaust fan 15 to a supply/exhaust pipe 14 that passes through the wall W of the building through a ventilation duct 10. The combustion air is mixed with combustion air supplied from an air supply pipe 17 having an air supply port 17a, and is actively combusted. Furthermore, the combustion tube 11 erected at the upper opening of the burner outer tube 6a performs secondary combustion of the combustion gas combusted by the burner device 6, and also directs this combustion gas to the upper opening of the combustion tube 11. transferred to a heat exchanger 12 forming a meandering flow path on the side,
Here, heat is exchanged with the air fluid from the convection blower 13 installed in the upper part of the case body 2, and the heat-exchanged hot air fluid is passed through the hot air outlet ( (not shown) into the room to heat the room.

On the other hand, the exhaust gas whose temperature has been lowered by heat exchange with the heat exchanger 12 is exhausted to the outside through an exhaust port 16a connected to an exhaust pipe 16 by an exhaust fan 15. .

[Problems with background technology]

However, in the above-mentioned F/F combustion type combustion device, during combustion, the supply and
When strong wind is blown into the exhaust port 16a of the exhaust stack 14, the exhaust resistance increases depending on the air blowing conditions.
Due to insufficient exhaust, the internal pressure of the burner device 6 becomes high, and the raw gas in the burner device 6 is mixed with the burner inner cylinder 6b of the burner device 6, which is provided to prevent oil sump combustion. Reflux pipe (return pipe) 1 connected between oil tank 4
8 to the oil tank 4, and further, these raw gases leak into the room from a small air exchange hole (not shown) drilled in the fuel filler cap 4a.
There is a risk of contaminating the room with bad odors.

On the other hand, it is conceivable to eliminate the air exchange small hole and form an air exchange path using the return pipe 18, but it is possible to prevent the raw gas from leaking into the room. However, it is predicted that the return pipe 18 communicating with the burner inner cylinder 6b of the burner device 6 will become clogged with dust, tar, soot, etc. after long-term use. Ventilation to the oil tank 4 is cut off, and as the fuel pump 5 pumps up fuel, the inside of the oil tank 4 becomes negative pressure, and the amount pumped by the fuel pump 5 gradually decreases, resulting in insufficient calorific value (thermal power). There is also a risk of the fire extinguishing itself.

[Purpose of invention]

The present invention has been developed in view of the above-mentioned circumstances, and aims to reduce the exhaust resistance by increasing the air pressure of the burner outer cylinder of the burner device and the internal pressure of the oil tank by strong winds from outside air. The present invention also provides a combustion device whose purpose is to prevent the raw gas that flows back from the burner device and generates an odor from leaking into the room.

[Summary of the invention] The invention provides an oil tank at the bottom of the case body, a burner device equipped with a burner outer cylinder on the board directly above the oil tank, and an equal pressure between the burner outer cylinder and the oil tank. They are configured to be connected and communicated by pipes.

[Example of idea]

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

It should be noted that the present invention will be described with the same reference numerals attached to the same constituent members as in the above-described specific example.

In FIG. 2, an oil tank (fuel tank) 4 equipped with a filler cap 4a containing petroleum 3 as fuel is located at the lower part 2a of a box-shaped case body 2 installed on a flat stand 1. It is provided,
Above this oil tank 4 is a board 2 that also serves as a partition plate.
b is provided horizontally. Also, this board 2
On b, there is a burner outer cylinder 6a and a burner inner cylinder 6.
A burner device 6 consisting of a burner device 6 is installed so that it can be supplied with oil by an oil supply pump 5, and a part of the burner device 6 is provided with an ignition plug 7. Further, a cylindrical combustion tube 11 is installed at the upper part of the burner outer tube 6a, and a heat exchanger 12 having a meandering flow path is connected to one side of the upper part of the combustion tube 11. One end of the heat exchanger 12 is attached to the fan casing 15a of the exhaust fan 15. Furthermore, the exhaust port 1 of the exhaust fan 15
6a, an exhaust pipe 16 of the supply/exhaust pipe 14 is piped to penetrate the wall W and exhaust to the outside, and the exhaust gas from the exhaust fan 15 is passed through the exhaust port 16a of the exhaust pipe 16. It is piped so that the air is exhausted from the room to the outside. In addition, the supply/exhaust pipe 14
Inside, an air supply pipe 17 having an air supply port 17a is connected to supply air to a combustion air fan (air supply fan) 9.
A blower duct 10 is provided in such a manner that it communicates with the burner outer cylinder 6a of the burner device 6.

On the other hand, the burner inner cylinder 6 of the burner device 6
A reflux pipe 18 is connected between B and the oil tank 4, and an isobaric pipe (also referred to as an isobaric pipe) 19 is connected between the burner outer cylinder 6a of the burner device 6 and the oil tank 4. are connected.

Therefore, during combustion heating, the fuel pumped from the fuel pump 5 is transferred to the burner inner cylinder 6b of the burner device 6.
is supplied with fuel and ignited by a spark plug 7, and on the other hand, from a combustion air fan 9 driven by a drive motor 8 through a blowing duct 10 to an air supply port 1.
It is mixed with the combustion air supplied from 7a and combusted. Further, the combustion gas combusted by the burner device 6 undergoes secondary combustion in the combustion tube 11, and is then transferred to the heat exchanger 12 forming a meandering flow path.
The hot air fluid heat-exchanged here is transferred to the convection blower 1.
3, air is blown into the room from the hot air outlet to heat the room.

On the other hand, the exhaust gas heat-exchanged by the heat exchanger 12 is sent to the exhaust port 1 by the exhaust fan 15.
The air is exhausted to the outside from 6a.

Next, when a strong wind hits the exhaust port 16a and exhaust resistance increases, a part of the combustion air that has flowed into the lower part of the burner outer cylinder 6a from the air duct 10 is transferred to the newly connected equal pressure pipe. The burner inner cylinder 6 communicates with the oil tank 4 through 19.
Since the pressure is set to be approximately the same as the internal pressure of the burner device 6, the raw gas in the burner device 6 will not flow down to the oil tank 4 through the reflux pipe 18, and there will be no fear of raw gas leaking into the room.

[Effect of idea]

As described above, according to the present invention, the oil tank 4 is provided in the lower part 2a of the case body 2, the burner device 6 equipped with the burner outer cylinder 6a is provided on the substrate 2b directly above the oil tank 4, and the burner device 6 is provided with the burner outer cylinder 6a. Since the cylinder 6a and the oil tank 4 are connected and communicated by the equal pressure pipe 19, even if the exhaust resistance increases due to strong winds at the exhaust port 16a, the raw gas will not leak into the room due to reflux. This can be prevented, and the structure can be simplified to facilitate assembly and adjustment.

[Brief description of the drawings]

FIG. 1 is a sectional view of a previously proposed combustion device, and FIG. 2 is a sectional view of a combustion device according to the present invention. 2...Case body, 4...Oil tank, 5...Refueling pump, 6...Burner device, 6a...Burner outer cylinder, 6b...Burner inner cylinder, 10...Air supply duct, 11...Combustion cylinder , 12... heat exchanger, 14
...Supply/exhaust pipe, 18...reflux pipe, 19...equal pressure pipe.

Claims (1)

[Scope of utility model registration request] An oil tank installed at the bottom of the case body, a burner device equipped with a burner outer cylinder that has an air supply path communicating with the outdoors on a board directly above the oil tank, and a connection between the burner device and the oil tank. 1. An outdoor supply/exhaust type combustion apparatus comprising an oil supply pump and a return pipe, characterized in that the burner outer cylinder and the oil tank are connected and communicated by an equal pressure pipe.