JPS5937403B2 - oil burning appliances - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in an oil combustion appliance that maintains a relationship between combustion air and fuel that always achieves a complete combustion state. The internal oil level is always kept at the set normal oil level, and static pressure is applied to the fuel meter that supplies a certain amount of fuel to the combustion burner.
Oil-burning appliances that burn with a balance between the amount of combustion air and the amount of fuel are already known.

The most important thing for this type of oil-burning appliance is to always maintain a balance between the amount of combustion air and the amount of fuel even if the combustion conditions are varied, but this point is almost never solved under normal conditions. There is.

However, for some reason, the normal oil level in the fuel meter may rise, and when this abnormally rising oil level occurs, a larger amount of fuel than the set amount of fuel is supplied to the combustion burner. This resulted in an imbalance between the amount of combustion air and the amount of fuel, resulting in the generation of carbon and the drawback of incomplete combustion, which caused a large flare-up.

The reason for this can be explained using the conventional oil combustion equipment shown in Fig. 4.The fuel meter 7' uses the head of a fixed tank or a removable tank, etc. from 1σ to always maintain a normal oil level. Normally, the fuel tank 10' is kept at position A, but at the same time when the fuel tank 10' is refueled from a drum installed in an outdoor low-temperature location, cold outdoor air at a low temperature also enters the fuel tank 10'.

This low-temperature outdoor cold air is brought into the high-temperature indoor space together with the fuel in the fuel tank 10', so due to this large temperature difference between the outdoors and indoors, the cold air in the fuel tank 10' is heated to a high temperature, causing the fuel tank 10' to ′ expands rapidly.

The expansion pressure of this cold air presses the fuel surface in the fuel tank 1σ, and when fuel is supplied from the fuel tank 1σ to the fuel meter γ, the fuel is rapidly filled from the high-pressure fuel tank 10'. , set normal oil level A
A large amount of fuel is supplied above the abnormally rising oil level B.

The same applies to the case of failure of the oil level setting device 11 of the fuel meter 7'.

That is, to show this diagrammatically, the height from the reference plane E to the normal oil level A or the nozzle body C is defined as H8, and the height from the normal oil level A to the abnormally increased oil level B is defined as Hl. , the static pressure applied to the fuel metering device 7' from the first branch pipe is P2, and the discharge pressure P is set.

In the case of binding, P2=Ho+H1+P2.

Therefore, the additional pressure added to the height H1 from the normal oil level level A to the abnormally increased oil level level B becomes a load.

In other words, in a conventional oil burning appliance when the above phenomenon occurs, the abnormal oil level rises from the normal oil level A to the oil level B.
Since the pressure (weight) up to This caused carbon to be generated and red flame combustion to flare up.

Furthermore, this incomplete combustion continues until the abnormally elevated oil level B decreases to the normal oil level A, and the larger the difference between the outdoor cold air and the indoor temperature difference, the longer it will take until complete combustion occurs. It also takes longer.

Further, when installing the main body 28' of the device, if the device is tilted at an angle of 2 to 3 degrees that cannot be completely confirmed with the naked eye, a problem arises with the conventional device.

That is, when the fuel meter is tilted toward the γ side as shown in FIG.
The normal oil level A substantially rises and becomes a sloping oil level, but since the combustion burner 1' side rises, the static pressure from the branch pipe 18' presses it to the raised height of the nozzle body. It is not capable of extinguishing a fire, so there is no safety issue.

However, when the nozzle body 8' of the combustion burner 1' side is tilted, the oil level substantially rises to the normal oil level A and becomes the inclined oil level C, while the nozzle body of the combustion burner 1' descends. Therefore, the result is exactly the same as the above-mentioned abnormally increased oil level B, and therefore a large amount of fuel is supplied to the combustion burner 1', resulting in an imbalance between the amount of combustion air and the amount of fuel, which may generate carbon. It was something that caused a huge red flame to flare up.

The present invention focuses on this point and attempts to eliminate the above-mentioned conventional drawbacks.

Next, I will explain one embodiment of this invention shown in the drawings.
Reference numeral 1 denotes a combustion burner having a hollow vaporizing chamber 2 with a hollow tip and a flame port 3 formed on the upper side of the vaporizing chamber 2, with a temperature of 200 to 24 degrees Celsius at the bottom.
A heating heater 4 for heating to 0 degrees is provided at the lower part of the combustion chamber 5.

6 is a fuel meter 7 that always maintains the oil level at a set position;
A solenoid valve 8 that opens when energized and closes when energized is stopped is connected via an oil feed pipe 9, and a nozzle body that turns fuel into particles or mist is directed into the vaporization chamber 2.

The fuel meter 7 has a box shape and is connected to a refueling tank 10 such as a removable tank or an installation tank to maintain the oil level set by the oil level setting device 11 while utilizing the head. If the oil supply pipe 9 is connected continuously and downwardly, and a removable oil tank 10 is used, a slight gap should be formed in the sealing gasket 12 to the extent that it does not affect the static pressure loaded inside. Or 0.5-1.0m
An abnormal pressure relief section 13 formed by a hole or the like having a diameter of about m is provided on the upper wall.

Further, the oil levels of the fuel meter 7 and the nozzle body 6 are made to be the same.

Reference numeral 14 denotes a combustion fan that supplies combustion air to the vaporization chamber 2 and is equipped with a fan motor 15 and supplies combustion air to the vaporization chamber 2 via an air passage 16 .

A T-shaped damper chamber 17 having an inlet side (a), an outlet side (a), and an insertion side (C) open is connected to the middle of the air passage 16.

Further, the upper wall of the fuel metering device 7 is penetrated from the center of the unopened portion of the damper chamber 17 at a position close to the combustion burner 1 side from the center of the fuel metering device 7, and at least below the abnormally increased oil level level B. A small-diameter branch pipe 18 communicating with the damper chamber 17 is extended and opened so as to separate a part of the combustion air, and the branch pipe 18 is communicated with the damper chamber 17. A damper 2 has an opening in a wall surface substantially opposite to the damper 2 and is variable in angle from 0 to 170 degrees.
1.

When the branch pipe 18 communicates with the fuel meter 7, it is very convenient to connect it with a flexible pipe at a midway point.
Also, the opening of the branch pipe 18 is 0.5 to 1.
If it is located at about 0 mm, the sound of fuel being sprayed will be silent under normal conditions, and if it is opened below the normal oil level level A, it will push up the fuel and make a sound when it is normal. It is convenient to open the opening at a position slightly apart from position A.

In addition, in the middle of the branch pipe 18, in order to prevent the fuel in the fuel meter 7 from flowing back due to high pressure and entering the damper chamber 17, a check valve 22 is provided which allows static pressure to pass through but blocks fuel.
has been established.

The inlet 19 of the damper 21 is opened 100 to 90% of the longitudinal cross-sectional shape of the air passage 16 during high power combustion, further 50 to 40% during medium power combustion, and further 20 to 10% during low power combustion. At the same time, the opening shape when viewed from the front is shaped like an overturned spatula, and the outlet 20 also has a 90-70% opening during high-power combustion, and a 5-5% opening during medium-power combustion.
The opening degree is 0 to 40%, and further 30 to 25% during low-power combustion.Moreover, the opening shape from the front is roughly rolled over, and there is an inlet 19 and an outlet 2.
By changing the opening ratio from 0 to 0 except for medium-fired combustion, the balance between the amount of combustion air and the static pressure loaded on the fuel meter 7 is maintained, so even if the final amount of combustion air and fuel change during combustion, the It will maintain the combustion state.

23 is a firepower adjustment bundle integrated with the damper 21,
When pressed, the starting switch 24 is closed, the control circuit (not shown) is energized, and the firing switch is rotated by an angle of 0 to 170 degrees in order to appropriately adjust the firepower.

25 is the igniter.

26 is a thermoswitch that closes only when the heating heater 4 reaches the set temperature after the starting switch 24 is closed, and this stops the power supply to the heating heater 4 and causes the igniter 25 to start spark discharge. Then, the solenoid valve 8 is opened and the fan motor 15 is started.

27 detects the presence or absence of combustion with a flame sensor, and in the event of a misfire, the power supply to the control circuit is stopped.

Reference numeral 28 denotes a device main body that houses the above-mentioned components.

Next, the operation of this embodiment of the present invention will be described. When the thermal power adjustment bundle 23 is rotated, the heater 4 is first energized and the temperature of the vaporizing chamber 2 is raised to a set temperature.

After several minutes have passed, the vaporization chamber 2 rises to the set temperature, the thermoswitch 26 closes, the heater 4 is stopped energized, the solenoid valve 8 opens, the igniter 25 discharges a spark, and the fan motor 15 is energized and started. .

At the same time, the damper 21 is also rotated to a desired angle to supply combustion air to the vaporization chamber 2 according to each adjustment hole 19, 20, and also to the fuel meter 7 through the valve adjustment hole through the branch pipe 18. 19. Combustion air according to 20 is divided and a static pressure balanced with the amount of combustion air is applied.

As a result, the fuel in the fuel meter T is pressed to an amount corresponding to the load due to static pressure, and is ejected from the nozzle body 6 to form a mixture with combustion air.

At this time, since the temperature has risen to the temperature set in the vaporization chamber 2, it instantly turns into vaporized gas, and the igniter 25 starts ignition and combustion near the flame nozzle 3.

Even if the fire power adjustment bundle 23 is varied at an angle other than extinguishing during this combustion, the integrated damper 21 is also tuned at the same time, and the combustion air amount and fuel amount are proportional to each adjustment hole 19, 20, so that the combustion burner 1 A state of complete combustion is maintained.

Next, the fuel in the fuel tank 10 decreases due to combustion, so after replenishing the fuel tank 10 with fuel, the fuel meter γ
As shown in Fig. 2, due to failure of the oil level setting device 11 or failure of the oil level setting device 11, a large amount of fuel is supplied as shown in Fig. Abnormally rising oil level level B is located above.

When combustion starts in this state, the fuel meter 7 of the present invention
Since the branch pipe 18 is extended and opened at least below the abnormally rising oil level level B, the diagram is as shown below.

The height from the reference plane E to the normal oil level A or the nozzle body 6 is H8, and the height from the normal oil level A to the abnormally increased oil level B is Hl. 7 is the static pressure loaded on P2, and the discharge pressure P is set.

When closed, Po-H8+H1+P1...1 formula,
P1= P2-H, ≧0...2 equations, substituting these 2 equations into 1 equation, Po=Ho + H1+P2-H-Ho+P2
...There will be 3 types.

On the other hand, the diagram for normal oil level A is Po-Ho+P2・
. . 4 equations, and therefore, by equations 3 and 4, the discharge pressure to the combustion burner 1 at the abnormally rising oil level level B and the normal oil level level A becomes the same.

In other words, when the abnormally raised oil level B is reached, an extra pressure corresponding to the height H1 from the normal oil level A to the abnormally raised oil level B is added, but if the branch pipe 18 is at least abnormally raised. Since the opening extends downward from the oil level level B, the static pressure discharged from this branch pipe 18 is once discharged into the fuel at a height Hl from the normal oil level level A to the abnormally increased oil level level B. Since static pressure is applied to the abnormally rising oil level B from the fuel, energy corresponding to the height Hl is taken away from the fuel, and therefore the static pressure applied to the abnormally rising oil level B is reduced.
Even if the oil level level B becomes abnormally high as a result, the discharge pressure P is the same as the normal oil level level A.

Therefore, a large amount of fuel is prevented from being supplied to the combustion burner 1, and complete combustion, which is exactly the same as when the oil level is normal A, can be achieved.

Next, when installing the device body 28, if it is tilted at an angle of 2 to 3 degrees that cannot be completely confirmed with the naked eye, if it is tilted toward the fuel meter 7 side as shown in FIG. However, since the combustion burner 1 side rises, the static pressure from the branch pipe 18 does not have the ability to press the nozzle body 8 to the elevated height, and fuel is not supplied and the fire is extinguished. , so there is no safety problem.

However, if the main body 28 of the apparatus is tilted toward the combustion burner 1, the normal oil level A rises to the front tilt position C, while the nozzle body 8 of the combustion burner 1 descends.

At this time, the slope front position C is substantially raised and the opening of the branch pipe 18 is immersed in the oil level, so as described in the above section regarding the abnormally increased oil level position B, the conditions for formulas 3 and 4 are Even if the oil level reaches the slope front position C, the static pressure applied to the slope front position C will be reduced, resulting in complete combustion in the same way as when the oil level is normal A. be able to.

However, if the instrument body 28 is tilted at an angle that can be completely confirmed with the naked eye, for example, 5 degrees or more, the height H8 from the reference plane E to the normal oil level A will fluctuate greatly, so the combustion will be similar to the conventional one. The amount of air and the amount of fuel become unbalanced, causing carbon to be generated and red flame combustion to flare up.

However, at this time, it is clearly visible to the naked eye that there is a large inclination, so it is only necessary to correct the levelness at the time of installation.

As described above, in the present invention, combustion air is supplied to the combustion burner 1 through the air passage 16, and the branch pipe 18 branched from the air passage 16 is communicated with the fuel metering device γ to apply static pressure to combust fuel. In the one supplied to the burner 1, the branch pipe 18 communicating with the fuel meter 7 is extended from the center of the fuel meter 7 to a position close to the combustion burner 1 and at least below the level of the abnormally rising oil level. Therefore, for some reason, excess fuel is supplied in the fuel meter and the oil level rises abnormally above the normal oil level, which can be visually confirmed. Even if the main body of the device is tilted, it will not be subjected to high static pressure, and the amount of combustion air and fuel will be balanced and the combustion will be completed at exactly the same level as the normal oil level, so no carbon will be generated. This also prevents red flame combustion from causing a large flare-up.

Furthermore, in addition to always keeping the amount of combustion air and fuel in balance even when the combustion state is varied, the amount of combustion air and fuel are also balanced and perfectly balanced even when the oil level is abnormally rising or when the instrument body is tilted. It becomes an oil burning appliance.

In addition, it has a simple structure due to the mounting position and opening of the branch pipe relative to the fuel meter, and has an extremely practical advantage.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the essential parts of an embodiment of this invention, Fig. 2 is an explanatory diagram showing the relationship between the normal oil level and abnormally elevated oil level, and Fig. 3 is when the instrument body is tilted. FIG. 4 is an explanatory diagram showing the relationship between a normal oil level and an abnormally increased oil level in a conventional combustion appliance, and FIG. 5 is an explanatory diagram when the conventional appliance main body is tilted. DESCRIPTION OF SYMBOLS 1... Combustion burner, 7... Fuel meter, 16... Air duct, 18... Branch pipe.

Claims (1)

[Claims] 1 A device that supplies combustion air to the combustion burner 1 via the air passage 16, and connects a branch pipe 18 branched from the air passage 16 to a fuel metering device γ to apply static pressure to supply fuel to the combustion burner 1. At this point, the branch pipe 18 communicating with the fuel metering device 7 is connected from the center of the fuel metering device 7 to the combustion burner 1.
An oil-burning appliance characterized by having an opening extended at a position close to the side and at least below the level of the abnormally rising oil level.