U.S. patent application number 14/366928 was filed with the patent office on 2014-11-27 for burner for cooking equipments.
The applicant listed for this patent is WHIRLPOOL S.A.. Invention is credited to Marcos Raphael Da Silva, Henrique Cesar De Gaspari.
Application Number | 20140345598 14/366928 |
Document ID | / |
Family ID | 47630027 |
Filed Date | 2014-11-27 |
United States Patent
Application |
20140345598 |
Kind Code |
A1 |
Da Silva; Marcos Raphael ;
et al. |
November 27, 2014 |
BURNER FOR COOKING EQUIPMENTS
Abstract
The present invention refers to a burner for cooking equipments
which comprises a configuration whose purpose is to ensure the
integrity of the flames of the main openings by maintaining the
pressure originated in the burner. Particularly, the present
invention refers to a burner which comprises a base (1) containing
a cavity (2), in which a sustaining element (3) that supports a
cover (4) is placed; wherein, between said sustaining element (3)
and said cover (4), it is formed a channel (5), which, at least
partially, encircles the cited cavity (2) to form at least one
pilot flame at the end (6) of said channel (5) that is provided in
the periphery of the edge of the cavity (2).
Inventors: |
Da Silva; Marcos Raphael;
(Joinville, SC) ; De Gaspari; Henrique Cesar;
(Joinville, SC) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
WHIRLPOOL S.A. |
Sao Paulo - SP |
|
BR |
|
|
Family ID: |
47630027 |
Appl. No.: |
14/366928 |
Filed: |
December 18, 2012 |
PCT Filed: |
December 18, 2012 |
PCT NO: |
PCT/BR2012/000524 |
371 Date: |
June 19, 2014 |
Current U.S.
Class: |
126/39E ;
431/278 |
Current CPC
Class: |
F24C 3/10 20130101; F24C
3/085 20130101; F23D 14/06 20130101; F23D 14/58 20130101 |
Class at
Publication: |
126/39.E ;
431/278 |
International
Class: |
F24C 3/08 20060101
F24C003/08; F24C 3/10 20060101 F24C003/10 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 21, 2011 |
BR |
P1105194.9 |
Claims
1. A burner for cooking equipments, which is composed of a base (1)
containing a cavity (2), CHARACTERIZED in that it comprises a
sustaining element (3) placed in the interior of said cavity (2),
which supports a cover (4), wherein, between said sustaining
element (3) and said cavity (2), it is formed a channel (5) which,
at least partially, encircles the periphery of the cavity (2); and
the end (6) of said channel (5) being capable of producing at least
one pilot flame along said cavity (2).
2. A burner, in accordance with claim 1, CHARACTERIZED in that said
channel (5) is continuous and encircles the entire periphery of the
cavity (2), being configured to produce an uniform flame along the
entire extension of the edge of said cavity (2).
3. A burner, in accordance with claim 1, CHARACTERIZED in that said
cover (4) comprises a lower peripheral surface whose geometrical
configuration includes primary openings (30) and secondary openings
(40), which preferably have a substantially concave and convex
shape, respectively.
4. A burner, in accordance with claim 1, CHARACTERIZED in that said
sustaining element (4) comprises a surface whose geometrical
configuration includes primary openings (30) and secondary openings
(40), which preferably have a substantially concave and convex
shape, respectively.
5. A burner, in accordance with claim 1, CHARACTERIZED in that said
cover (4) only comprises primary openings (30).
6. A burner, in accordance with claim 1, CHARACTERIZED in that said
base (1), the cited sustaining element (3) and the cover (4)
comprises orientating and positioning guide means for such
components during the assembly of the burner.
Description
FIELD OF THE INVENTION
[0001] The present invention refers to a burner for cooking
equipments, which comprises technical and functional features that
are capable of enhancing the safety levels of such equipments.
Particularly, the cited burner for cooking equipments, in
accordance with the present invention, refers to an improvement to
burners of cooking equipments which comprise a configuration whose
purpose is to ensure the integrity of the flames in the main
openings (porticos) by maintaining the pressure originated in the
burner balanced, especially those of the type defined in patent BR
0804615, filed by the same applicant.
BACKGROUND OF THE INVENTION
[0002] According to the prior art, it is broadly known that the gas
cooking equipments are composed of a cook top containing some
burners that are responsible for promoting the flame and the
heating of the utensils (cooking pots, roasting pans, and the
like). Normally, said burners are composed of a body comprising
several openings that allow the formation of the flames. Such
openings are orifices that fluidically connect the internal chamber
of the burner to the atmosphere.
[0003] Nowadays, there are several models of burners, which had
been developed in order to enhance the efficiency or to help with
the tasks and daily utilization by the users. However, it is noted
that the most conventional techniques are not able to harmonically
and efficiently combine the aspects related to the thermal
efficiency with the simplification for handling and cleaning the
cooking equipments, besides the safety factors which are, from day
to day, becoming fundamental features for the cooking
equipments.
[0004] As already known by the skilled in the art, the conventional
burners lack solutions whose constituting parts present
configurations that are capable of simultaneously providing the
enhance of thermal efficiency, the aid in the cleaning, and safety
in relation to the stability of the flames. This is due to the fact
that these burners present a relative truncated geometry having
several "sharp corners" and small orifices which are difficult to
be cleaned, enhancing the deposit of impurities. As another
consequence of such geometries, it is verified that the produced
flames impair the thermal efficiency, resulting in the prolongation
of the time spent for the preparation of the food in the cooking
equipments, or a greater consumption of combustible gas.
[0005] The prior art includes, for example, the following documents
JP 62091728, U.S. Pat. No. 5,865,615, GB 907619, JP 2001215019, and
U.S. Pat. No. 6,170,479, which reveal solutions to solve problems
and inconvenient aspects related to the production and manufacture
of burners for cooking equipments, but these solutions still impair
or do not meet at all the requirements related to the thermal
efficiency, to the procedures of cleaning and operational safety of
the cooking equipments.
[0006] With respect to the safety aspects, the conventional prior
art burners are commonly subjected to eventual disturbances due to
the environmental conditions of the place, mainly with gusts and
streams of wind, even resulting in the extinguishment of the
assembly of flames that is produced by the openings of the burner,
possibly causing the leakage of gas and eventual accidents. In this
sense, it is known several techniques to avoid these problems and
accidents, such as, for example, systems and devices which are
applied to the feed valves with appropriate mechanisms to interrupt
the supply of gas in the absence of flame. Moreover, there are also
some burners containing pilot flames, or secondary flames, whose
purpose is to keep the flames burning or relight the flames which
have been eventually extinguished by an external disturbance.
[0007] For example, documents BR 9205865, BR 0902703, U.S. Pat. No.
4,891,006, and U.S. Pat. No. 6,851,420 define burners that reveal
the general concept of considering a pilot flame to relight the
flames of the main openings in case of such flames being
extinguished by an external event. However, in spite of containing
such basic function of maintaining the assembly of flames, it is
noted that these burners still present some inconvenient aspects
and/or technical and functional limitations which impair the
suitable operation of such essential parts of the cooking
equipments. More specifically, it is noted that such pilot flames
are almost individualized and/or discontinued around the periphery
of the burners. Moreover, these documents reveal configurations
that are quite complex and also difficult to be manufactured and
cleaned, but such configurations are mainly not capable of
promoting the suitable stabilization and balance of the pressure of
the air/combustible mixed flow.
[0008] More particularly, it is verified that some burners aim, as
one of the objectives thereof, the increase in the ratio of the
flame power, which determinates the amplitude of the levels of
power of the burners, i.e. the ratio between the value of maximum
power and minimum power of the burners. In this sense, it is known
that a greater ratio of power enables the preparation of different
types of food with the same burner. For example, the burner has the
flexibility of melting, in a slow way, a chocolate bar and cooking
a more sophisticated dish which requires a greater power. However,
in practice, it is noted that, mainly in the conventional and
residential cooking equipments, such ratio of flame power is
considered too low, the reason why it is not possible to obtain a
burner that is capable of generating, in an effective manner, low
flames and high power, requiring, therefore, the development and
application of burners with intermediate rates.
[0009] Additionally, as it presents a ratio of flame power that is
considered rather low, some models of cooking equipments cannot
work in an efficient and safety manner when the same are provided
to work at low power, since the flames produced by the main
openings are rather weak and easily disturbed and/or extinguished,
revealing the high index of instability of the flame assembly.
[0010] It is further noted that some models of burners from the
prior art do not comprise means that are capable of providing the
balance of pressure for the combustible flow inside the
distribution chamber, causing inconvenient situations when such
burners are working at maximum power, condition during which the
pressure of the combustible flow increases in a significant manner.
In these cases, due to the increase in pressure, it is likely to
face the risk of the produced flames coming out from the main
openings, directly affecting the quality of the combustible burn
and, eventually, causing the extinguishment of the burner.
[0011] Moreover, considering that there is no simple and safety way
of obtaining the balance of pressure of the combustible flow in the
distribution chamber, the air/combustible ratio becomes different,
remaining an imbalanced amount of combustible, resulting in an
incomplete or deficient reaction, and affecting, therefore, the
thermal efficiency of the burner.
[0012] As an attempt to solve the problems and inconvenient aspects
of such prior art burners, it has been developed an assembly of
base and cover for burners, which is the object of patent BR
0804615, filed by the proper applicant, which comprises a smooth
geometrical configuration, without "sharp corners", to facilitate
the cleaning process, and whose openings are designed so as to
produce flames that are capable of increasing the thermal
efficiency of the cooking equipments. Shortly, in accordance with
the appended FIG. 1, this assembly is composed of a base 100 which
holds a cover 110 in a cavity 120, wherein the most external
periphery of the cited cover 110 is composed of adjacent primary
130 and secondary 140 openings, whose shapes are preferably concave
and convex, respectively.
[0013] Although extremely functional, it was noted that the cited
burner would be even more improved, in especial in relation to the
safety aspects, mainly in relation to the stabilization of the
flames that are produced by the primary and secondary openings.
[0014] Thus, it is noted that the prior art burners for cooking
equipments would be improved, in especial the one defined by patent
BR 0804615, so as to provide an increase in the ratio of the flame
power, without affecting the operation and enhancing the risks of
extinguishment or impairment of the assembly of flames, as well as
the obtainment of a simplification of the structures and assembly
of the burners, so as to promote the stability and efficiency of
the flame assembly, whatever in low or high power of working.
Objectives of the Invention
[0015] In view of the foregoing, it is one of the objectives of the
present invention the provision of a burner for cooking equipments
which is capable of improving and/or minimizing, in a simple and
efficient manner, the inconvenient aspects and limitations of the
burners that are already known in the prior art.
[0016] Particularly, it is one of the objectives of the present
invention the provision of a burner for cooking equipments which is
capable of improving the assembly of base and cover for the burner
that is defined in patent BR 0804615.
[0017] More particularly, it is one of the objectives of the
present invention the provision of a burner for cooking equipments
whose features enhance the safety levels, as well as ensure the
functioning of the burners by maintaining the pressure of the flow
of air and combustible balanced, stabilizing, thus, the assembly of
flames that is produced by the openings of the burner.
[0018] According to the present invention, the burner comprises a
configuration that allows the increase of the ratio of the flame
power, so as to enable that the same burner works with a power
amplitude that is greater than the one in conventional burners,
especially ensuring the stabilization of the flames in low power
due to the formation of a pilot flame that is continuous and
substantially uniform under the main openings.
SUMMARY OF THE INVENTION
[0019] Therefore, in order to obtain the above-mentioned objectives
and technical effects, the present invention refers to a burner for
cooking equipments which is composed of a base in which a
sustaining element of a cover is placed, wherein the cited burner
comprises a continuous and uniform channel between the sustaining
element and the cavity body, and whose end produces at least one
pilot flame along the extension of the periphery of the edge of the
cavity.
[0020] According to an alternative embodiment, the pilot flame
produced by said channel is continuous along the entire extension
of the edge of the cavity.
[0021] According to one embodiment of the present invention, the
burner for cooking equipments comprises a cover whose lower
peripheral surface has a geometrical configuration that is composed
of primary openings and secondary openings, which preferably have a
substantially concave and convex shape, respectively.
[0022] In another embodiment of the present invention, the burner
for cooking equipments comprises a sustaining element including a
surface whose geometrical configuration is composed of primary
openings and secondary openings, which preferably present a
substantially concave and convex shape, respectively.
[0023] Alternatively, the cited burner for cooking equipments, in
accordance with the present invention, comprises one cover having
primary openings, only.
[0024] Also considering another embodiment of the present
invention, the base, the sustaining element and the cover of the
burner comprise guide means to facilitate orientating and
positioning such components, in relation one to the others, during
the assembly process.
[0025] It is also another objective of the present invention the
improvement to the burner assembly that is defined in patent BR
0804615, whose content is considered a reference to the present
specification.
SHORT DESCRIPTION OF THE DRAWINGS
[0026] FIG. 1--illustrates an exploded perspective view of a prior
art burner, which is defined in patent BR 0804615;
[0027] FIG. 2--illustrates an exploded side view of the burner for
cooking equipments, in accordance with one embodiment of the
present invention;
[0028] FIG. 2A--illustrates an extended cut view of the sustaining
element fixed to the base of the burner, in accordance with the
present invention;
[0029] FIG. 3--illustrates an exploded perspective of the side view
of the burner for cooking equipments, in accordance with another
embodiment of the present invention;
[0030] FIG. 4--illustrates an extended perspective view of the edge
of the burner that is illustrated in FIG. 3;
[0031] FIG. 5--illustrates a schematic cut view of the burner, in
accordance with the present invention, indicating the formation of
the flames though the main openings and the formation of the pilot
flame.
DETAILED DESCRIPTION OF THE INVENTION
[0032] According to the above-mentioned figures, it will be
described below, in a more detail manner, some examples of feasible
embodiments of the present invention, emphasizing that it refers to
a mere exemplificative and non-restricting description, since the
present burner may be constituted by different sizing and
aesthetical features without escaping from the desired scope of
protection.
[0033] The burner for cooking equipments, in accordance with the
present invention, comprises a base 1 containing a cavity 2, in
which a sustaining element that supports a cover is placed;
wherein, between said sustaining element and said cavity, it is
formed a channel which encircles the entire periphery of the edge
of said cavity 2, forming a pilot flame at the superior end 6 of
said channel 5.
[0034] According to the embodiment illustrated in FIG. 2, it is
noted that said cover 4 comprises a lower peripheral surface whose
geometrical configuration is composed of primary openings 30 and
secondary openings 40, which preferably have a substantially
concave and convex shape, respectively.
[0035] Thus, in accordance with the present invention, due to the
arrangement of the cited sustaining element 3, it is possible to
obtain a pilot flame that is relative small, constant and
continuous along the entire periphery of the edge of the cited
cavity 2 of the base 1. In other words, said pilot flame is placed
just below the cited primary openings 30 and secondary openings 40,
so as to ensure, in case of affecting the flame of said openings
due to any external disturbance, automatic igniting, eliminating
the risk of extinguishment of the flame of any opening or the
leakage of combustible.
[0036] Additionally, upon attaching the cited cover 4 to the
burner, the cavity 2 forms a kind of distribution chamber for the
mixture air and combustible, wherein, due to the arrangements of
the cited sustaining elements 3 inside the cited cavity, it is
possible to obtain the balance of pressure of the mixed flow
towards the atmosphere. This is due to the fact that the cited flow
is divided, inside the cavity 2, into a main flow that runs towards
the cited primary openings 30 and secondary openings 40, and a
parallel flow that passes through a channel 5 whose profile is so
constant that the volume of flow in the channel 5 will not be
subjected to any extreme variation when the pressure in the burner
changes. Consequently, the cited pilot flame will be kept uniformly
at the end 6.
[0037] According to an alternative embodiment of the present
invention, and in accordance with the schematic illustration of
FIGS. 3, 4, and 5, the burner for cooking equipments, according to
the present invention, comprises a base 1 containing a cavity 2, in
which a sustaining element that supports a cover is placed. In this
embodiment, the peripheral surface of the sustaining element 3
comprises a geometrical configuration that includes the primary
openings 30 and the secondary openings 40, which preferably present
a substantially concave and convex shape, respectively. The cited
cover 4, in this case, has a complementary configuration to close
the cavity 2 and simultaneously and literally form the passages of
said openings 30, 40.
[0038] Shortly, it can be informed that the difference between the
preferable embodiments that are illustrated in the appended
drawings is basically due to the positioning of the surface that
includes the geometry of formation of the primary openings 30 and
secondary openings 40, i.e. in the embodiment illustrated in FIG.
2, said surface is arranged on the cover, while in the embodiment
of FIGS. 3 and 4, said surface is formed in the body of the
sustaining element 3.
[0039] As can be verified by the skilled in the art, in a simpler
embodiment, it is possible to provide a burner whose cover 4 or
sustaining element is only configured with primary openings,
eliminating the secondary openings 40.
[0040] More objectively, the burner of the cooking equipments,
which is the objet of the present invention, comprises a
configuration whose arrangement of the sustaining element 3 inside
the cavity 2 enables the generation of a continuous and uniform
flame along the entire periphery of the edge of the cavity and,
consequently, even with a air/combustible flow at low pressure, it
is noted that the cited pilot flame can maintain the stability of
the assembly of flames, produced by the primary and secondary
openings, safety and efficient, since the uniform and continuous
formation thereof ensure that, during an eventual disturbance of
the main openings, the same will be automatically and immediately
ignited.
[0041] Still in this context, the arrangement of the sustaining
element 4 inside the cavity 2 enables to set the pressure that
flows towards the atmosphere though the primary openings, secondary
openings and channel 5, avoiding, thus, that during the operation
of the burner at maximum power, the flame to come out, and,
consequently, obtaining a flame of better quality.
[0042] According to an advantageous embodiment, the cited base 1,
the sustaining element 3, and the cover 4 comprise guide means to
facilitate the orientation and positioning of these components
during the assembly of the burner.
[0043] Although the figures show a burner whose shape is circular,
it shall be further emphasized that this shape can vary in
accordance with the technical or ornamental configuration of the
burner and also in accordance with the configuration of the proper
cooking equipment.
[0044] Finally, it is important to corroborate that the above
description has the simple objective of describing, as an
exemplificative manner, some preferable embodiments of the burner
for cooking equipments, in accordance with the present invention.
Thus, as already known by the skilled in the art, it is possible to
effectuate several constructive modifications, variations, and
combinations considering the elements that have the same function
and the same substantial form to achieve the same results, which
are within the scope of protection, as restricted by the appended
claims.
* * * * *