Note: Descriptions are shown in the official language in which they were submitted.
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BACKGROUND OF TIIE INVENTION
~ield of the Invention
l'his invention relates to a pot-type oil burner,
and more particularly to a pot-type oil burner adapted to
be instantly Eire-extinguished and prevent the generation
of bad odor during the fire-extinguishing operation.
Description oE the Prior Ar-t
As widely lcnown in the art, a pot-type oil burner
is generally constructed in a manner to supply a fuel oil
such as kerosene directly to a pot and carry out vapori-
zation, mixing and partial combustion of the fuel oil in
the pot. A conventional oil burner oE such type is adapted
to ensure normal combustion during the regular co~bustion
operation. However, the conventional oil burner has a
disadvantage that it is substan-tially impossible to
instantaneously stop the vaporization, mixing and combustlon
at the time of fire-extinguishing, so that the fire-
extinguish operation requires a rela-tively long tlme and
causes unstable combustion and the genera-tion of bad odor.
BRIEF SUMMARY OF THE INVENTION
The present invention has been made in view of
the foregoing disadvantage of the prior art.
Accordingly, it is an object of the present
invention -to provide a pot-type oil burner which is capable
of instantaneously carrying out fire-extinguishing w-ithout
generating bad odor.
It is another object of the present invention
to provide a pot-type oil burner which is capable of readily
suppressing abnormal combustion occurring in a pot and
instantly accomplishing fire-extinguishing.
It is a further object of the present invention
to provide a pot-type oil burner which is capable of
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substantially completely preventing the generation of bad
odor at the fire-extinguishing operation as well as
instantly carrying out fire-extinguishing.
In accordance with the present invention, there
is provided a pot-type oil burner comprising a pot having
a heating means disposed therein and a plurality of
through-holes formed at the side wall thereof so as to carry
out vaporization, mixing and ignition of a fuel oil; an
air supply means for supplying air to the pot; an oil supply
means for supplying a fuel oil to the pot; an air pipe for
introducing a part of air in the air supply means
therethrough to the pot; and an oil pipe for introducing
a fuel oil from the oil supply means therethrough to the
pot; the air pipe and oil pipe merging into a single pipe
extending to the pot, the single pipe having a nozzle means
extending into the pot provided at the end portion thereof
so that a fuel oil carried on air is ejected in the form
of fine particles at a high velocity from the nozzle means
into the pot,
Preferably, the nozzle means is inserted through
an opening formed at the side wall of the pot to have a
larger dimension than a diameter of the nozzle means with
a gap being defined therebetween which allows air to be
supplied therethrough from the air supply means to the pot.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects and many of the attendant advantages
of the present invention will be readily appreciated as
the same becomes better understood by reference to the
following detailed description when considered in connection
with the accompanying drawings, wherein:
the single figure is a vertical sectional view
showing an embodiment of a pot-type oil burner according
to the present inven-tion.
D~TAIL~D D~SCRIPTION OF Tll~ P~EF~RR~D ~MBODIM~NT
Now, a pot-type oil burner accordiny -to the
present invention will be described hereinafter with
reference to the accompanyiny drawings.
/ The figure illustrates an embodiment of a pot-type
oil burner according to the present invention wherein the
oil burner is generally indicated by reference numeral 10.
The oil burner illustrated is a red-hot type oil space
heater, however, it should be noted that the oil burner
is not limited -to such oil space heater.
The oil burner 10 includes a pot 12 which is
adapted to carry out the vaporization, mixing and ignition
of a fuel oil such as ]~erosene supplied thereto in a manner
as described hereinafter in detail. The pot 12 has a lower
chamber 1~ and an upper chamber 16 defined therein by a
horizontal partition 17 having an opening 18 formed at the
central portion thereof, through which -the chambers 14 and
16 are communicated with each other. The lower chamber
14 has a heater 20 provided therein which acts to heat a
fuel oil to vaporize it and ignite the vaporized fuel oil
to burn a part thereof using air mainly supplied frorn
throu~h-holes 22 formed at the side wall thereof. The elec~ic
heater 20 is preferably arranged adjacent -to the bottom
surface of the lower chamber 14 to heat it to a higher
temperature, to thereby effectively vaporize a fuel oil
rained thereon. The upper chamber 16 has a mixing means
24 provided therein, which is arranged at a position above
the opening 18. The mixing means 24 serves to prepare a
combustible gas by uniformly diffusing a fuel oil vaporized
in the lower chamber 14 in the upper chamber 16 and allowing
the difused fuel oil to be mixed with air supplied in the
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~; chamber 16 through a plurality of through-holes 26 formed
at the side walls of the chamber 16.
The oil burner 10 also includes an air supply
means for supplying air to the pot 12 which comprises an
air an 28 provided at the exterior of the burner and an
air supply passage 30 connected to the Ean and defined in
-the burner which is communicated with the interior of the
pot 12 through the through~holes 22 and 26 of the pot and
an air supply pipe 32 connected between the passage 30 and
the pot.
In addit.ion, the oil burner 10 includes an oil
supply means for supplying a fuel oil to the pot 12, which
comprises an oil tank 34 and an oil reservoir 36. The oil
reservoir 36 is constructed to support the tank 34 in an
inverted manner and keep the level of a fuel oil therein
substantially constant. The oil reservoir 36 is
communicated with the pot 12 through an oil supply pipe
38 so as to supply a -fuel oil from the reservoir 36 to the
pot, In the embodiment illustrated, a fuel oil is supplied
by means of an electromagnetic pump 40 provided between
the oil supply pipe 38 and the reservoir 36.
Above the pot 12, a combustion chamber 46 is
arranged which is adapted to burn therein a combustible
gas formed in the upper chamber 16 utilizing combustion
air supplied from the air passage 30 through the through-
holes 26 thereto and heat of a fuel oil burned in the pot
12. The combustion chamber 46 has an outer perforated
combustion cylinder 48 and an inner perforated combustion
cylinder 50 each formed of a ceramic material. A
combustible gas supplied to the combustion chamber 46 is
burned on the outer surface of the inner cylinder 50 and
the both surfaces of the outer cylinder 48 to red-heat the
cylinders 48 and 50, to thereby allow the cylinders to emit
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heat rays. Around the outer combustion cylinder ~8 is
disposed a transparent heat-permeable cylinder 52 formed
of a heat-resistant glass throucJh which heat rays emitted
from the cylinders are discharged to the exterior of the
burner. Above the combustion chamber 46, an auxiLiary
combustion chamber (not shown) may be arranged in
communication therewith. The auxiliary combustion chamber
ac-ts to completely burn a combustible gas and the like which
may remain in a combustion gas produced in the combustion
chamber ~6.
An essential feature of the oil burner according
to the present invention constructed in the manner as
described herei.nbefore is that the air supply pipe 32 and
-the oil supply pipe 38 are merged into a single pipe 54
extending to the pot so that a fuel oil may be supplied
to the pot 12 -together with air and that the oil supply
pipe 32 or single pipe 54 is formed at the end portion
thereof ex-tending through the side wall of the pot 12
therein with a nozæle pipe 56 having a much smaller diameter
which is adapted to allow a fuel oil mixed with air and
carried thereon to be ejected in -the form of fine particles
therefrom into the pot. The nozæle pipe 56 is preferably
disposed to permit a fuel oil ejected from the nozzle
to be dispersed over the entire bottom surface of the
pot to be instantaneously vaporized by the heated bottom
surface and the heater. In the embodiment illustrated,
the nozzle 56 is disposed adjacent to the bottom surface
of the pot 12 and to gently slope downwardly toward the
bottom surface, to thereby allow a drizzle-like fuel oil
ejected from the nozzle to be rained on the entire bottom.
It is also preferable that the nozzle pipe 56
is loosely inserted through an opening 58 formed at the
side wall of the pot 12 which has a dimension or a diameter
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larger than a diameter of the nozzle pipe 56, with a gap
~- 60 being defined -therebetween, to thereby prevent abnormal
combustion occurring in the lower chamber when the supply
of a fuel oil is suddenly reduced from causing unstable
combustion ancl readily accomplish fire-extinguishiny.
Now, the manner of operation of the pot-type oil
burner will be explained hereinafter.
Electric current is supplied to the heater 20
to hea-t the lower chamber 14, particularly, the bottom
surface thereof to a predetermined temperature and
air is supplied through the air supply passage 30 by means
of the air fan 28. Then, a fuel oil is supplied from the
reservoir 36 through the oil supply pipe 38 to the nozzle
pipe 56 of the single pipe 54 by means of the electro-
magnetic pump 40 and simultaneously air is supplied fromthe air supply passage 30 through the air supply pipe 32
to the nozzle pipe 56, so that the fuel oil is carried on
the air in the nozzle and ejected in the form of fine
particles from the nozzle pipe into the lower chamber 14
of the pot 12 at a high velocity because the nozzle has
a much smaller diame-ter. The fuel oil ejected into the
lower chamber 14 is dispersed over the entire bottom surface
of the pot 12 and heated by the heated bottom surface and
the heater 20 to be instantaneously vaporized. The heater
20 also serves to ignite the vaporized fuel oil to allow
a part of the vapori.zed fuel oil to be burned in the lower
chamber 14 using air supplied from the air passage 30
through the through-holes 22 to the lower chamber 14. The
vaporized fuel oil is then introduced through the central
opening 18 of the partition wall 17 into -the upper chamber
16 and mixed with air supplied from the passage 30 through
the through-holes 26 of the side wall of the chamber 16
thereto to form a combustible gas. The so-formed
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combustible gas is supplied to the combustion chamber 46
toge-ther with -the vapori~ed fuel oil ignited in the lower chamber
to be subjected to combustion in the combustion chamber
~6 using combustion air supplied Erom the passage 30 through
the through-holes 26 of the upper chamber 16 to the chamber
46. The combustion in the chamber 46 allows the cylinders
50 and 52 to be red-heated to emit heat rays which are
discharged through the heat-permeable cylinder 51 to the
exterior.
A combustion gas produced by the combustion
chamber 46 is discharged through an upper opening 62 of
the combustion chamber to the exterior. The combustion
gas may be cleaned by an auxili.ary combustion chamber
disposed above the combustion chamber ~6 as desiredO
In the pot-type oil burner of the presen-t
invention described hereinbefore, the oil supply pipe 38
and air supply pipe 32 merge into the single pipe 54
extending to the pot 12 and the single pipe 5~ is provided
at the end portion thereof with the nozzle pipe 56 extending
into the pot, so that a fuel oil is carried on air at a
high velocity in the nozzle pipe and ejected in the form
of fine particles from the nozzle pipe. Thus~ a drizzle-
like fuel oil is ejected from the nozzle pipe and rained
on the entire bottom surface of the lower chamber 'l4 heated
to a high temperature by the heater 20 to be instantly
vaporized. This effectively prevents the bottom surface
of the pot from getting wet with a liquidous fuel oil, to
thereby allow the bottom to be kept in a dry state, Thus,
it wilL be noted that the present invention can readily
accomplish fire-extinguishing without generating ba~ odor
whenever the supply of a fuel oil is stopped.
One of the reasons why the conventional pot-type
oil burner requires a long time for carrying out
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fire-e~-tinguishing is that a fuel ol.l remaining in an oil
supply pipe is vaporized and burned in a po-t heated to a
high temperature. The present invention can efectively
eliminate such deEect of the prior art because the nozzle
pipe has a small area sufficient to substantially reduce
the trans~er of heat from the pot thereto and is always
cooled by a fuel oil and air supplied therethrough, so that
the nozzle pipe is not heated to a temperature sufficient
to cause such defect as mentioned above. Particularly,
-the presen-t invention effectively eliminates such
disadvantage due to the fact that the nozzle pipe of a small
diameter is formed at the end of the single pipe and a fuel
oil carried on air is supplied through the nozzle pipe at
a high velocity, so that a fuel oil may not substantially
remain in the nozzle pipe at the fire~extinguishing
operation.
A pot-type oil burner is generally constructed
to minimize combustion within a pot and substantially carry
out it in a combustion chamber. However, the pot-type oil
burner, when -the supply of a fuel oil is suddenly and
substantially reduced~ causes combustion to mainly occur
in the pot. This results in fine parti.cles of a fuel oil
in an oil supply pipe heated to a high -temperature being
in a boiled state to stop the supply of a fuel oil, to
thereby render combustion unstable. The present invention
is adapted to effectively prevent unstable combustion due
to such abnormal combustion by loosely inserting the nozzle
pipe through the opening of the pot to define the gap
between the nozzle pipe and the opening through which air
is allowed to be supplied to the pot. More particularly,
such~abnormal combustion causes the bottom wall and lower
side wall o the pot to be heated to a considerably high
- temperature; however, the present invention is constructed
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in -the manner such tha-t the nozzle pipe is disposed not
to contact directly wi-th the pot in order to minimize heat
transEer therebetween and air flows through the gap into
the pot to cool the outer surface oE the nozzle pipe, so
that the nozzle ls not substan-tially heated due to such
abnormal combustion. Thus, it will be noted that the
above-mentioned unstable combustion due to such abnormal
combustion can be effectively prevented and Eire-
extinguishing can be readily carried out by stopping the
supply of a fuel oil even when the abnormal combustion
occurs.
As can be seen from the foregoing, the present
invention is capable oE eEfectively accomplishing the
above-mentioned objects be-cause the bottom surface of the
pot is always kept in a dry state and the supply of a fuel
oil at the time of fire-exti.nguishing is readily stopped
by the nozzle pipe, so that the fire-ex-tinguishing may be
instantly carried out without generating bad odor by a
simpl.e operation.
As many apparently widely different embodiments
of this invention may be made without departing from the
spirit and scope thereof, it is to be understood that the
invention is not limited to the specifi_ embodiment thereof
except as defined in the appended claims,
