JPS5937402B2 - 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 if this occurs, a larger amount of fuel than the set amount of fuel will be supplied to the combustion burner. However, there was an imbalance between the amount of combustion air and the amount of fuel, resulting in the generation of carbon and incomplete combustion, which caused a large red flame combustion.

The cause of this problem can be explained using the conventional oil combustion equipment shown in Fig. 3.The fuel meter 7' uses the height from the oil supply tank 10', such as an installed tank or a removable tank, to always keep the oil in a normal state. Normally, the surface position A is maintained, but at the same time when oil is supplied from a drum can installed in an outdoor low temperature place into this oil tank 1σ, cold outdoor air at low temperature also enters the oil tank 10'.

This low-temperature cold air outdoors is brought into the interior of Kotoku along with the fuel in the fuel tank 1σ, so due to this large temperature difference between the outdoors and indoors, the cold air in the fuel tank 10' becomes high temperature and the fuel tank 10' expands rapidly within.

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

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

That is, to show this diagrammatically, the height from the reference surface C to the normal oil level A or the nozzle main C is defined as H6, 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 meter γ from the first branch pipe is P2,
Set discharge pressure P.

In this case, Po−Ho+H1+P2.

Therefore, an additional pressure is applied to the height H1 from the normal oil level level A to the abnormal oil level rise front position B.

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.

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

Next, one embodiment of this invention shown in the drawings will be explained.
Reference numeral 1 denotes a combustion burner having a round hollow vaporization chamber 2 and a flame port 3 formed on the upper side of the vaporization chamber 2, and has a temperature of about 200 to 200 degrees Celsius at the bottom.
A heater 4 for heating to 40 degrees is provided at the bottom 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, Om
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, a small-diameter branch is connected from the center of the unopened part of the damper chamber 17 through the upper wall of the fuel meter 7 so as to divert at least a portion of the combustion air below the abnormally rising oil level level B. The pipe 18 is extended and opened, and the branch pipe 18 is communicated with the damper chamber 17, and the tip is concave so that the inlet 19 and the outlet 20 are opened on substantially opposite wall surfaces, and at an angle of 0 to 170 degrees. It is equipped with a damper 21 that can be freely changed up to

It is very convenient for the branch pipe 18 to communicate with the fuel meter 7 and to connect it with a flexible pipe at a midpoint.
Also, the opening of the branch pipe 18 is 0.5 to LO below the normal oil level level A.
If it is located at about mm, the sound of spraying the fuel will be silent under normal conditions, and if it is opened below the normal oil level A, it will push up the fuel and generate a sound during normal conditions.
In practice, it is convenient to open at a position slightly apart from the normal oil level 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 through an angle of 0 to 170 degrees 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.

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 branch pipe 18 to each adjustment hole. 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 7 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 hot oil meter 7
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. The 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 C to the normal oil level A or the nozzle body 6 is defined as H8, the height from the normal oil level A to the abnormally increased oil level B is defined as Hl, and the height from the branch pipe 18 to the fuel meter 7 is defined as H1. The static pressure loaded on is P2, and the discharge pressure P is set.

When closed, Po=H. +H, +P,...1 set,
P, -P2-H, ≧0... 2 equations, substituting these 2 equations into 1 equation, Po - Yamato 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 rising oil level B occurs, an extra pressure is added to the height H1 from the normal oil level A to the abnormally rising oil level B, but if the branch pipe 18 becomes at least abnormal Since the opening extends downward from the rising oil level B, the static pressure discharged from this branch pipe 18 is once discharged into the fuel at a height H2 from the normal oil level A to the abnormally rising oil level B. Since the static pressure is then applied to the abnormally rising oil level B, energy corresponding to the height Hl is taken away during combustion, and 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.

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

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 meter 7 to apply static pressure to combust fuel. The fuel supplied to the burner 1 is characterized by having the branch pipe 18 communicating with the fuel meter 7 extended and opened at least below the level of the abnormally rising oil level. Even if excess fuel is supplied in the fuel meter and the oil level rises to an abnormally high level above the normal oil level, the amount of combustion air and fuel will be maintained without being subjected to high static pressure. This is balanced and complete combustion occurs at exactly the same oil level as the normal oil level, thus preventing the generation of carbon and the occurrence of red flame combustion causing a large flare-up.

In addition, even when the combustion state is varied, the amount of combustion air and the amount of fuel are always balanced, and even when the oil level is abnormally rising, the amount of combustion air and the amount of fuel are also balanced, making it a perfect oil burning appliance.

Furthermore, since the structure is simple due to the improved branch pipe, it has extremely practical advantages.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part of an embodiment of this invention, Fig. 2 is an explanatory diagram showing the relationship between the normal oil level and abnormally increased oil level, and Fig. 3 is a sectional view of the main part of an embodiment of this invention. An explanatory diagram showing the relationship between a normal oil level and an abnormally increased oil level. 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 through an air blowing path 16, and connects a branch pipe 18 branched from the air blowing path 16 to a fuel metering device 7 to apply static pressure to supply fuel to the combustion burner 1. An oil combustion appliance characterized in that a branch pipe 18 communicating with the fuel metering device 7 is extended and opened at least below the abnormal rise front position.