Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02843634 2014-01-30
INFRARED RAY GAS BURNER
FIELD OF THE INVENTION
The present invention relates generally to a gas burner, and particularly to
an improvement
on the ignition system of a household infrared ray gas burner.
BACKGROUND OF THE INVENTION
With the improvement of people's living standards, gas utensils, such as home
gas cooker,
warmer and barbecue oven, have spread to millions of households; wherein, the
infrared ray gas
burner has been accepted by domestic customer, commercial user and industrial
user, because it
has
obvious high performances on energy efficiency and environmental protection,
cleanliness of health and safe and reliable. Since a larger relatively large
primary air coefficient
has been adopted by the infrared ray gas burner, and the burner will be
normally ignited and
combusted only after the air in the furnace chamber of the burner, which
chamber is used for
mixing burner gas with primary air and is fairly large, has been emptied,
therefore, it is difficult to
directly ignite the gas-air mixture escaping from a fire hole by pulse
electrical sparkle or
piezoelectric ceramic ignition, both of which are easy to produce deflagration
when ignition, and
generally the ignition is achieved by igniting the main burner via a start-up
burner through an
ignition nozzle. Meanwhile, for domestic infrared ray gas cooker, and
specifically for built-in type
cooker, considering the beauty of the cooker surface and sealing requirement,
the ignition burner
is installed outside the infrared main burner, such as the center, bottom and
external of the burner
outside burner, with adopting a certain elevation upward. Gas flows into the
ignition support
through the ignition nozzle and mixes with partial air, electric ignition
sparkle ignite the mixed
gas on the ignition support to form an ignition flame, and the ignition flame
is fired into the main
burner, so as to ignite the main burner. At present, the burners in the market
have the following
defects on ignition structure and operating mode:
1. In the way of igniting the burner from the outside of the burner by
igniting on the external
perimeter of the burner, its structural design must keep a certain gap between
the burner and the
disc or the cooker surface, otherwise, the main burner ignited by an ignition
flame will be affected,
but this structure obviously affects the appearance of the product, and makes
the product be no
vitality and no market value. In addition, the ignition flame is large, so the
decorative sheet or the
cooker surface around the burner will be blackened that obviously affects the
appearance of the
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product, and at the same time, there is much incomplete combustion therein.
2. In the way of igniting the burner from outside flame by an ignition nozzle
placed at the
bottom of the burner, it needs a center channel to ignite the main burner. In
the moment of igniting
the start-up burner, flareback is likely to happen after the flame spurts and
touches the ignition
plate, which will burn in front of the start-up burner, and the transmission
distance of the flame is
not enough to reach the main fire hole or main fire plate, therefore resulting
in misfire or
deflagration.
3. In the way of igniting the burner from outside flame by an ignition nozzle
placed at the
bottom of the burner, it needs a center channel to ignite the main burner. Due
to the limited
diameter of the center channel, it has a certain obstruction against the
transmission of the flame.
When the piping gas pressure is low, the ignition flame cannot overcome the
resistance to reach
the main fire hole, resulting in misfire. When the piping gas pressure is
high, the air in the center
channel is quickly removing by the smoke generated by the ignition flame, and
then the
transmission of the flam is limited due to lack of oxygen in the channel.
4. In the way of igniting the burner from outside flame by an ignition nozzle
placed at the
bottom of the burner, it needs a center channel to ignite the main burner.
Because the ignition
center channel is small, the ignition flame is generally large and black and
has obviously
incomplete combustion, and the gas-air mixture of the main burner lags to
reach the main ignition
fire hole with low concentration; when ignition is not successfully achieved
in the ignition
moment, the ignition flame will be directed to the bottom of the burner, and
due to the inertia of
the flame, the ignition flame cannot stay on the surface or side face of the
main ignition fire hole,
and therefore cannot normally ignite the burner.
5. In the way of igniting the burner from outside flame by an ignition nozzle
placed at the
bottom of the burner, the structures of the ignition nozzle and the ignition
support are more
complex, so they are not easy to be installed at the bottom of the burner or
in the narrow space of
the center channel, and the reliability and precision of the installation are
low, and therefore result
in poor ignition performance of the product.
6. In the way of direct ignition through an ignition flame on the upper
surface of the infrared
ray combustion radiant panel, since the chamber volume of the infrared ray
burner is large, it
needs a long time for the gas-air mixture to extrude the original air in the
chamber, and the
concentration of the gas is low, so it is difficult to ignite and causes a low
fire rate, especially
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when igniting by piezoelectric ceramics it is very difficult to achieve normal
ignition.
Therefore, how to design and change the structure of the burner so as to
improve the
appearance and ignition reliability of the product becomes a tough technique
problem in the
product design of infrared ray gas burner for domestic and commercial use,
especially in the
design of built-in type infrared ray cooker at present.
SUMMARY OF THE INVENTION
The object of the invention is to improve the ignition structure of a burner
and provide a new
ignition integrated structure of infrared ray burner, so that the product will
have
beautiful appearance, high ignition reliability of burner, good combustion
performance,
simple and credible structure, and will be easy to install and adapted to a
wide range of gas.
The technical solution of the present invention is as follows:
An infrared ray gas burner consists of an ignition valve 1, a nozzle 2, an
ejector 3, a furnace
chamber 4, a porous combustion radiant panel 5 and an ignition needle 6, an
ignition nozzle 7
passes through the furnace chamber 4 and is settled in the chamber body of the
furnace chamber 4
and below the porous combustion radiant panel 5, a sundries baffle 8 is
provided in the furnace
chamber 4 below the porous combustion radiant panel 5 and above the ignition
nozzle 7, the
ignition needle 6 is set above the porous combustion radiant panel 5 which is
set above the
ignition nozzle 7, the needle apex of the ignition needle 6 is placed 1 mm to
10 mm above the
porous combustion radiant panel 5; the ignition needle 6 and the housing of
the furnace chamber 4
can form an ignition circuit, wherein the housing of the furnace chamber 4
serves as an ignition
negative pole, or alternatively an independent ignition negative pole 9 can be
added; when the
burner is a double ring burner, the ignition needle 6 and the sundries baffle
8 can be placed in the
inner ring of the double ring burner, and they also can be placed in the outer
ring of the double
ring burner; the porous combustion radiant panel 5 can be porous ceramic
radiant panel, metal
mesh combustion radiant panel, metal fiber combustion radiant panel, metal
honeycomb body
combustion radiant panel, foam metal combustion radiant panel, wire mesh
combustion radiant
panel or metal hole combustion radiant panel; the ignition needle 6 meanwhile
can be used as a
flame ionization probe of a accidental flameout protection device. Therefore,
when ignite the gas
burner, open the ignition valve 1, and the ignition needle 6 generates an
ignition spark above the
porous combustion radiant panel 5 if the ignition nozzle 7 and the nozzle 2
both supply gas.
Because the ignition nozzle 7 is placed in the furnace chamber 4, the gas for
ignition ejected from
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the ignition nozzle 7 quickly mixes with the air inside the furnace chamber 4,
the gas-air mixture
escapes from fire holes of the porous combustion radiant panel 5 above the
ignition nozzle 7, and
the gas concentration is relatively high and suitable for igniting, the main
burner can be quickly
ignited. Due to the suitable dispersity and concentration of the ignition
flame, there is no
obviously incomplete combustion, no black smoke, and it brings a high ignition
rate. The situation
that the ignition nozzle 7 is blocked caused by sundries, such as fluids,
filtering through the
porous combustion radiant panel 5 during normal use, can be avoided by placing
the sundries
baffle 8 above the ignition nozzle 7 and below the porous combustion radiant
panel 5. When the
ignition needle 6 is used both as a flame ionization probe of an accidental
flameout protection
device and as an ignition needle for ignition flame, the circuit of the pulse
controller can be
designed such that the ignition needle 6 emits ignition sparks at the
beginning of the ignition, and
after the burner is ignited, the ignition needle 6 immediately becomes a probe
for detecting the
combustion flame signal of the burner.
The present invention can be used for domestic gas appliances, gas warmer, gas
barbecue
oven, gas drying plant, and so on, and the structures of the porous combustion
radiant panel 5 and
the furnace chamber 4 can be rounded, square, rectangle or other shapes; for
the structure of the
double ring burner, it can be inner and outer ring structure, or be left and
right separated ring
structure. For the burner with elongate structure, it can have two or more
sets of ignition structures,
each consisting of a ignition nozzle 7, a sundries baffle 8 and a ignition
needle 6, and the two or
more sets of ignition structures, as a whole, serve as the ignition system of
the whole burner, so
that the burner can be quickly ignited, and the flame can quickly spread to
the whole ignition
surface.
The present invention has the advantages of good performance in ignition, high
reliability,
good combustion performance, simple and credible structure, easy for
installation and
wide adaptation for gas.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention may be best understood by reference to the following description
taken in
conjunction with the accompanying drawings.
Figure 1 shows a front section view of an embodiment of the present invention.
Figure 2 shows a top view of the structure of an independent ignition negative
pole 9
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according to an embodiment of the present invention.
Figure 3 shows a top view of the structure of using the body of a furnace
chamber 4 as the
ignition negative pole according to an embodiment of the present invention.
Figure 4 shows a partial enlarged view of the structure of an ignition nozzle
7 according to an
embodiment of the present invention.
Figure 5 shows a front section view of the structure wherein the burner is a
double ring
burner and the ignition nozzle 7 is placed in the inner ring according to an
embodiment of the
present invention.
Figure 6 shows a front section view of the structure wherein the burner is a
double ring
burner and the ignition nozzle 7 is placed in the outer ring according to an
embodiment of the
present invention.
Figure 7 shows a partial enlarged top view of the structure wherein the burner
is a double
ring burner and the ignition nozzle 7 is placed in the outer ring according to
an embodiment of the
present invention.
Figure 8 shows a top view of the structure wherein the burner is a double ring
burner and the
ignition nozzle 7 placed in the inner ring has an independent ignition
negative pole 9 according to
an embodiment of the present invention.
Figure 9 shows a top view of the structure wherein the burner is a double ring
burner and the
ignition nozzle 7 placed in the outer ring has an independent ignition
negative pole 9 according to
an embodiment of the present invention.
Figure 10 shows a top view of the structure wherein the surface of the burner
is in combined
shape with two sets of ignition structures, each consisting of a ignition
nozzle 7, a sundries baffle
8 and a ignition needle 6, according to an embodiment of the present
invention.
Figure 11 shows a top view of the structure wherein the surface of the burner
has a combined
shape with only one set of ignition structures consisting of a ignition nozzle
7, a sundries baffle 8
and a ignition needle 6 according to an embodiment of the present invention.
Figure 12 shows a top view of the structure wherein the surface of the burner
has a
rectangular shape according to an embodiment of the present invention.
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Figure 13 shows a top view of the structure wherein the surface of the burner
has a square
shape according to an embodiment of the present invention.
Figure 14 shows a top view of the structure wherein the surface of the burner
has a trapezoid
shape according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Example 1 (Figures 1, 2 and 4)
An infrared ray gas burner for domestic use, consists of an ignition valve 1,
a nozzle 2, an
ejector 3, a furnace chamber 4, a porous combustion radiant panel 5 and an
ignition needle 6, an
ignition nozzle 7 passes through the furnace chamber 4 and is settled in the
chamber body of the
furnace chamber 4 and below the porous combustion radiant panel 5, a sundries
baffle 8 is
provided in the furnace chamber 4 below the porous combustion radiant panel 5
and above the
ignition nozzle 7, the ignition needle 6 is set above the porous combustion
radiant panel 5 which
is set above the ignition nozzle 7, the needle apex of the ignition needle 6
is placed 3 mm above
the porous combustion radiant panel 5, and the burner is provided with an
independent ignition
negative pole 9, which, together with the ignition needle 6, forms a ignition
circuit; the burner is a
simple ring burner; the porous combustion radiant panel 5 is a porous ceramic
radiant panel.
Therefore, when ignite the gas burner, the ignition valve 1 is opened, and the
ignition needle 6
generates an ignition spark above the porous combustion radiant panel 5 if the
ignition nozzle 7
and the nozzle 2 both supply gas. Since the ignition nozzle 7 is placed in the
furnace chamber 4,
the gas for ignition ejected from the ignition nozzle 7 quickly mixes with the
air inside the furnace
chamber 4, the gas-air mixture escapes from fire holes of the porous
combustion radiant panel 5
above the ignition nozzle 7, and the gas concentration is relatively high and
suitable for igniting,
the main burner can be quickly ignited. Due to the suitable dispersity and
concentration of the
ignition flame, there is no obviously incomplete combustion, no black smoke,
and it brings a high
ignition rate. The situation that the ignition nozzle 7 is blocked caused by
sundries, such as fluids,
filtering through the porous combustion radiant panel 5 during normal use, can
be avoided by
placing the sundries baffle 8 above the ignition nozzle 7 and below the porous
combustion radiant
panel 5. The present invention has the advantages of good performance in
ignition, high reliability,
simple and credible structure, easy for installation and wide adaptation for
gas.
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Example 2 (Figures 1, 3 and 4)
It is substantially the same as Example 1, differing only in that the ignition
negative pole of
the ignition needle 6 is the housing of the furnace chamber 4.
Example 3 (Figures 1, 3 and 4)
It is substantially the same as Example 1, differing only in that the ignition
negative pole of
the ignition needle 6 is the housing of the furnace chamber 4, the ignition
needle 6 is used both as
a flame ionization probe of an accidental flameout protection device and as an
ignition needle for
ignition flame; the circuit of the pulse controller is designed such that the
ignition needle 6 emits
ignition sparks at the beginning of the ignition, and after the burner is
ignited, the ignition needle
6 immediately becomes a probe for detecting the combustion flame signal of the
burner..
Example 4 (Figures 5, 8 and 4)
It is substantially the same as Example 1, differing only in that the burner
is a double ring
burner, and the ignition nozzle 7 is placed in the inner ring.
Example 5 (Figures 6, 9, 4 and 7)
It is substantially the same as Example 1, differing only in that the burner
is a double ring
burner, and the ignition nozzle 7 is placed in the outer ring.
Example 6 (Figures 1, 2 and 4)
It is substantially the same as Example 1, differing only in that the porous
combustion radiant
panel 5 is a metal mesh combustion radiant panel.
Example 7 (Figures 10 and 4)
It is substantially the same as Example 1, differing only in that the
structure of the porous
combustion radiant panel 5 has two sets of ignition structures, each
consisting of an ignition
needle 6, an ignition nozzle 7 and a sundries baffle 8.
Example 8 (Figures 11, 12, 13, 14 and 4)
It is substantially the same as Example 1, differing only in that the
structure of the porous
combustion radiant panel 5 has a combined-shape, rectangular shape, square
shape or trapezoid
shape.
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