Note: Descriptions are shown in the official language in which they were submitted.
B~CKGROUND OF T~IE INVENTION
Field of the Invention
This invention relates to an improved pot type
oil burner, and more particularly to a pot-type oil burner
which is adapted to stabilize the vaporization rate of a
fuel oil in a pot to Eorm a uniform combustible gas, to
thereby carry out stable and efficient combustion.
Description of the Prior Art
In a pot-type oil burner which does not use a
wick, it has been required to keep a pot or a vaporization
means at a high temperatu,re utilizing a radiant heat emitted
from a combustion chamber and/or a heat emitted from an
electric heater in order to effectively carry ou-t the
vaporization of a fuel oil such as kerosene in the pot.
In the oil burner of such type, there appears a phenomenon
that a fuel oil supplied to the pot, when heated to a high
temperature, gets about in the form o fine particles on
walls of the pot and is vaporized at a stretch. ~nfortu-
nately, this results in a conventional oil burner of such
type,having a disadvantage that it is substantially
impossible to s-tably supply a vaporized fuel oil to a
combustion chamber at a uniform rate, because it does not
have any means effective to prevent such phenomenon.
Further, it should be noted that such phenomenon appears
in a pot of a relatively low temperature as well as a high
temperature.
~ lso, the conventiona'l pot-type oil burner has
another disadvantage that the vaporization of a Euel oil
supplied to the po-t starts with a fraction of a lower
boiling temperature to cause tar to remain in the pot,
resulting in the oil burner causing an incomplete
combustion.
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BRIEF SUMMARY OF THE INVENTION
The present invention has been made in view of
the foregoing disadvantages of the prior art,
Accordingly, it is an object of the present
invent.ion to provide a pot-type oil burner which is capable
of stabilizing the vaporization rate of a fuel oil in a
pot and forming a uniform combustible gas to accomplish
the stable combustion with a good efficiency.
It is another object of the present invention
to provide a pot-type oil burner which is capable of
significantly reducing retention of tar in a pot to carry
out the stable complete combustion.
It is still a further object of the present
invention to provide a pot-type oil burner which is capable
of removing tar remaining in a pot as desired to constantly
ensure the stable complete combustion,
; In accordance with the present invention, there
: is provided a pot-type oil burner comprising a pot carrying
out at least the vaporization of a fuel oil supplied
thereto; 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 at least a part of air flowing through
: the air supply means therethrough to the pot; an oil pipe
for introducing a fuel oil from the oil supply means
therethrough to the pot; a fabric formed of a heat-resistant
fiber and spread on the bottom surface of the pot; a heating
means for heating the pot and fabric to a temperature
sufficient to vaporize a fuel oil supplied to the pot; and
a nozzle means connected with the oil pipe to eject a fuel
oil therefrom into the pot and positioned with respect to
~ the air pipe so as to supply the ejected fuel oil in the
;~ form of fine particles toward the substantially entire
; surface of the fabric by means of air supplied from the
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air pipe into the pot,
The fabric may be spread over the substan-tially
entire bo-t-tom surface of the pot. ~ preferred embodiment
of the prcsent inventlon may be construc-ted in a manner
such that the air pipe and oil pipe merge into a single
pipe ex-tending to the pot to carry a fuel oil on air, the
nozzle means is provided at the end of the single pipe,
the heating means is arranged adjacent to the fabric in
the pot, and the pot is provided at the side wall thereof
with a plurality of through-holes communicated with the
air supply means, whereby the pot carries out the mixing
of a vaporized fuel oil with air supplied through the
-through-holes thereto and the igni-tion as well as the
vaporization. Alternatively, the oil burner may be
construc-ted to extend the oil pipe. through the interior
of -the air pipe in-to the pot and mount the heating means
on the outside of the bottom wall of the pot, Also, the
fabric may be formed into a reticulate shape to carry an
oxidation catalyst thereon, Fur-thermore, the present
inventlon may be constructed to removably arrange the fabric
in the pot,
BRIEF DESCRIPTION_OF TEIE DRAWI~GS
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, in which like reference
numerals designate the same par-ts throughout the figures
thereof and wherein:
Fig, 1 is a vertical sectional view sho~ing one
embodiment of a pot-type oil burner according to the present
invention; and
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Fig. 2 is a vertical sectional view showing an
essential part of another embodiment of a pot-type oil
burner according to -the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIME~TS
Now, a pot--type oil burner according -to the
present inven-tion will be described hereinafter with
xeference to the accompanying drawings,
Fig. 1 illustrates one embodiment of a pot-type
1`0 oil burner according to the present invention wherein the
oil burner is generally designated by reference numeral
10. The pot-type oil burner illustrated in Fig. 1 is a
red-hot type oil space heater, however, it should be noted
that the oil burner is not limited to such space heater.
The oil burner 10 includes a pot 12 which is
adapted to carry out therein -the vaporization, mixing and
ignition of a fuel oil such as kerosene supplied thereto.
The pot 12 is separated into a lower chamber 14 and an upper
chamber 16 by a horizontal partition 18 having an opening
20 formed at the central por-tion thereof, through which
-the lower and upper chambers 14 and 16 are communicated
with each other. The lower chamber 14 has an electric
heater 22 provided therein which serves to heat a fuel oil
to vaporize it and ignite the vaporized fuel oil to burn
a part thereof using air supplied from through-holes 24
formed at the side wall thereof. The upper chamber 16 has
a mixing means 26 provided therein, which is arranged at
a position above the opening 20. The mixinq means 26 acts
to form a combustible gas in the upper chamber 16 by
uniformly diffusing in the upper chamber 16 a fuel oil
vaporized in the lower chamber 14 and allowing the diffused
oil fuel to be mixed with air supplied to the chamber 16
through a plurality of through-holes 28 formed at the side
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wall of -the chamber 16.
The oil burner 10 also includes an air suppLy
means for supplylng air to the pot 12. 'l`he air supply means
comprises an air fan 30 provided at the outside o~ the
burner and an air supply passage 32 defined in the burner
10 and connected to the fan 30. The air passage 32 is
communicated with the interior of -the pot 12 through the
through-holes 24 and 28 of the pot and an air supply pipe
34 connected between the passage 32 and the pot 12.
Fur-thermore, the oil burner 10 includes an oil
supply means for supplying a fuel oil to the pot 12, which
comprises an oil -tank 36 and an oil reservoir 38. The oil
reservoir 38 is adapted to support the oil tank 36 in an
inverted manner and also keep -the level of a fuel oil
therein substantially constan-t. The oil reservoir 38 is
communica-ted wi-th the pot 12 -through an oil supply pipe
40 so that a fuel oil may be supplied from the tank 36
therethrough -to the pot 12. In -the embodiment illustrated,
a fuel oil is supplied by means of an electromac~netic pump
42 connected between the oil supply pipe 40 and -the
reservoir 38.
The pot-type oil burr~er of the embodiment, as
shown in Fig. 1, is also constructed iII a manner such that
the air supply pipe 34 and the oil supply pipe 40 merge
into a single pipe 46 extending -to the pot 12 so that a
fuel oil carried on air may be supplied to the pot and the
oil supply pipe 40 or single pipe 46 is formed a-t the end
portion thereoE extending through the side wall of the pot
12 therein with a nozzle pipe 48. This allows a fuel oil
mixed with air and carried thereon to be ejected in the
form of fine particles therefrom into the pot.
Above the pot 12, a combustion chamber 50 is
arranged which is adapted to burn therein a combustible
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gas formed in the upper chamber 16 of the pot utilizing
combustion air supplied from the air passage 32 through
the through-holes 28 thereto and heat of a fuel oil burned
in the pot 12. The combustion chamber 50 has an outer
perEorated combustion cylinder 52 and an inner perforated
combus-tion cylinder 54 each formed of a ceramic material,
A combustible gas formed in the pot 12 and supplied to the
combustion chamber 50 is burned on the outer surface of
the inner cylinder 5~ and the both surfaces of the outer
cylinder 52 to red-heat the cylinders 52 and 5~, to thereby
allow the cylinders to emit heat rays, Around -the outer
combus-tion cylinder 52 is disposed a -transparent heat-
permeable cylinder 56 formed of a heat-resis-tant glass
through which heat rays emitted from the cylinders are
discharged to the exterior of -the burner, A cornbustion
gas produced in the combus-tion chamber 50 :is discharyed
-through an openlng provided at the top surface of the
combustion chamber to the exterior of the burner,
Al-ternatively, an auxiliary combustion chamber may be
arranged above the chamber 50 in communication therewi-th
to comple-tely burn a combus-tible gas and/or an incomplete
combus-tion gas which may remain in a combustion gas produced
in the combustion chamber 50,
One of essential features of the present invention
is that a fabric 60 Eormed of a heat-resistant fiber such
as si.lica Eiber, an asbestos fiber or the like is put down
on the bottom surface of -the lower chamber 1~ of the pot
12 and heated to a high temperature by a heater 22. The
fabric 60 is preferably a woven fabric although it may be
a non-woven fabric, The fabric 60 is preferably spread
on the substantially entire bottom surface of -the pot.
In the embodiment shown in Fig, 1, the fabric 60 is disposed
immediately below the heater 22 so as to be readily heated
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to a high temperclture, This efEectively prevents a part
of a fuel oil supplied -to the pot and heated to a high
temperature from get-ting about in the form of fine particles
in the pot, par-ticularly, on the bottom surface -thereof,
Also, such construction has another advantage that the
fabric absorbs a -fuel oil to allow -the fuel oil to have
an enlarged surface area, so that the fuel oil may be
instantly vaporized. Thus, it is possible to stably supply
a vaporized fuel oil to the combustion chamber at a uniform
rate, because the fuel oil can be continuously and
cons-tan-tly vaporized in -the pot, Further, it is possible
to significan-tly reduce the deposition of tar in the pot
because a fuel oil heated to a high temperature is prevented
:Erom getting about i.n the po-t,
I-t is preferable that the fabric 60 is merely
put down on the bottom surface of the po-t in order -that
when tar is substantially deposited on the fabric, it may
be readily removed from the pot for the purpose of exchange,
Also, the fabric is preferably formed i.n a re-ticulate shape
20 to allow an oxidation catalyst such as platinum or the like
to be carried thereon. This results in materials hard -to
be vaporized belng readily vaporized.
Another feature of the present invention is that
a fuel oil is supplied in the form of fine particLes to
the pot. A fuel oil is preferably rained on the sub-
stantially entire surface of the fabric. The embodiment
shown in Fig. 1 is constructed in a manner such that the
nozzle pipe 48 is disposed adjacent to the fabric 60 and
to gently slope downwardly toward the fabric, to thereby
allow a drizzle-like fuel oil ejected from the nozzle to
be rained on the entire fabric.
Now, the manner of operation of the pot-type oil
burner illustrated in Fig. 1 will be explained hereinafter.
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Electric current is supplied to the heater 20,
the air fan 30 and the e]ectroma~netic pump 42 to heat the
pot 12 and tl1e la~rlc G0 to a predeterminec1 temperature,
supply air to the air supply passage 32, and ini.tiatc the
supply of a fuel oil to the oil supply pipe 40, re-
spectively. A fuel oil is supplied from the reservoir 38
through -the oil supply pipe 40 to the nozzle pipe 48 of
the single pipe 46 and concurrently air is supplied from
the air supply passage 32 through the air supply pipe 34
to the nozzle pipe 48, so that the fuel oil is carried on
the air in the nozzle pipe 48 and ejected in -the form of
fine particles from the nozzle pipe into the lower chamber
14 of the pot 12 at a relatively hi~h velocity. The fuel
oil e~ec-ted into the lower chamber 14 is dispersed toward
the entire surface of the fabric 60 hea-ted to a high
temperature to be stably vaporized at a uniform rate. In
the embodiment of Fig. 1, -the heater 22 also serves to
ignite the vaporized fuel oil to allow a part thereof to
be burned in -the pot 12 using air mainly supplied through
the -through-holes 24 to the lower chamber 14. The vaporized
fuel oil is then introduced through the central opening
20 of the horizon-tal partition wall 18 into the upper
chamber 16 and mixed with air supplied from -the passage
32'through the through-holes 28 of the chamber 16 thereto
-to form a combustible gas. The so-formed combustible gas
is supplied to the combus-tion chamber 50 together wi,th the
fuel oil ignited in the lower chamber 14 -to be subjected
to combustion in the chamber 50 using combustion air
supplied from the passage 32 through the holes 28 of the
upper chamber 16 -to the chamber 50, The combustion allows
the cylinders 52 and 54 to be red-heated to em,it heat rays
which are discharged through the heat-permeable cylinder
51 to the exterior, A ho-t combustion gas produced by the
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combustion chamber 50 is discharged through an upper opening
of the combustion chamber to the exterior.
Fiy, 2 shows another embodlment of a po-t-type
oil burner according to the present invention. The oil
burner of the present embodiment is the type of carrying
out heating mainly due to convection. More particularly,
the oil burner 10 includes a pot 12 which has a fabric 60
formed of a heat~resistant fiber and spread on the entire
bottom surface -thereof. The pot 12 has an electric heater
22 mounted on the outside of the bottom wall thereof to
heat the pot 12 and the fabric 60 to a high temperature
sufficient to vaporize a fuel oil supplied thereto. The
. pot also has an air supply pipe 34 for supplying air Erom
an air supply means (not shown) therethrough to the pot
and a nozzl.e pipe 48 ex-tending through -the interior of -the
air supply pipe 34 into the pot 12. The nozzle pipe 48
acts to supply a Euel oil Erom an oil supply means (not
shown) therethrough ~o the pot 12. Thu~, a fuel oil cjected
from the nozzle pipe ~8 is formed into fine particles by
air supplied from the pipe 34 to the pot 12, carried on
the air and rained on the entire surEace of the fabric 60
heated to a high temperature; so that the fuel oil rnay bè
vapor:Lzed. The vaporized fuel oil is then supplied to a
mixing tube 62 vertically arranged at the upper portion
of the pot 12 together with air introduced from the pipe
34 to the pot, wherein the fuel oil is substantially mixed
with the air to form a combustibl.e gas. The so-formed
combustible gas is guided through a perforated plate 64
to a combustion means or combustion plate 66 having a
plurality of through holes 68 formed at the side wall
thereof and is ignited by a suitable igniting means. The
ignited combustible gas is burned at the combustion plate
66 to form a blue flame via the through-holes 68, to thereby
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procluce a combus-tion heat of a high temperature. The heat
is carried on a combustion gas and discharged through an
exhaust port (not shown) oE the oil burner Thus~ it will
be readily understood that the present embodiment has -the
same advantages as that of Fig. 1.
As can be seen from -the foregoing, the present-
invention is capable oE continuously and constantly
vaporlzing a fuel oil to stably supply it to the combustion
chamber at a uniform rate Furthermore, -the present
invention is capable of significantly reclucing retention
of tar in the pot and removing, as desired, tar remaining
in -the pot, to thereby constantly ensure complete
combustion.
As many apparently widely different embodiments
of this inven-tion may be made without departing from the
spirit and scope thereof, i-t is to be unders-tood tha-t the
inventlon is not limited to the specific embodiment thereoE
except as defincd in the appended claims.
