U.S. patent application number 14/342252 was filed with the patent office on 2014-10-30 for burner assembly for cooking equipments.
This patent application is currently assigned to WHIRPOOL S.A.. The applicant listed for this patent is Rodrigo Freguilia de Faveri, Marcos Raphael da Silva. Invention is credited to Rodrigo Freguilia de Faveri, Marcos Raphael da Silva.
Application Number | 20140318527 14/342252 |
Document ID | / |
Family ID | 46934351 |
Filed Date | 2014-10-30 |
United States Patent
Application |
20140318527 |
Kind Code |
A1 |
Silva; Marcos Raphael da ;
et al. |
October 30, 2014 |
BURNER ASSEMBLY FOR COOKING EQUIPMENTS
Abstract
The present invention relates to a burner assembly for cooking
equipments that has been designed to provide significant
improvement in thermal efficiency of the burner and making easier
the cleaning process by the user. The burner assembly comprises a
base (2) upon which a spreading cover (3) rests, and wherein the
coupling of the spreading cover (3) on the base (2) originates one
internal chamber of expansion (4) of air-fuel mixture which is
released through porticos existing under the perimeter edge of the
spreading cover (3), and wherein the base (2) comprises in its
internal region at least one feeding orifice (22); the spreading
cover (3) comprises at least one perimeter ring (31) cooperating
with the base (2) and at least one disc (32) cooperating with the
perimeter ring (31) and the burner assembly (1) comprises at least
one internal chamber of mixture (4) cooperating with the porticos
of the spreading cover (3).
Inventors: |
Silva; Marcos Raphael da;
(Joinville, BR) ; Faveri; Rodrigo Freguilia de;
(Joinville, BR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Silva; Marcos Raphael da
Faveri; Rodrigo Freguilia de |
Joinville
Joinville |
|
BR
BR |
|
|
Assignee: |
WHIRPOOL S.A.
Sao Paulo-SP
BR
|
Family ID: |
46934351 |
Appl. No.: |
14/342252 |
Filed: |
August 28, 2012 |
PCT Filed: |
August 28, 2012 |
PCT NO: |
PCT/BR2012/000319 |
371 Date: |
June 27, 2014 |
Current U.S.
Class: |
126/39E |
Current CPC
Class: |
F24C 3/08 20130101; F23D
14/34 20130101; F23D 14/065 20130101; F23D 2900/14062 20130101;
F23D 14/08 20130101; F23D 14/06 20130101; F23D 14/085 20130101 |
Class at
Publication: |
126/39.E |
International
Class: |
F24C 3/08 20060101
F24C003/08; F23D 14/06 20060101 F23D014/06; F23D 14/34 20060101
F23D014/34 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 2, 2011 |
BR |
PI1104482-9 |
Claims
1. Burner assembly for cooking equipments, said assembly (1) being
defined by a base (2) cooperating with a cooking table (M) on which
a spreading cover (3) is supported, wherein the coupling of the
spreading cover (3) over the base (2) originates at least one
internal expansion chamber (4) of fuel-air mixture that is released
through porticos existing in the perimeter edge of the spreading
cover (3), CHARACTERIZED in that: the base (2) comprises in its
internal region at least one feeding orifice (22); spreading cover
(3) comprises at least one perimeter ring (31) cooperating with the
base (2) and at least one disc (32) cooperating with the perimeter
ring (31); the burner assembly (1) comprises at least one internal
mixture chamber (4) cooperating with the porticos of the spreading
cover (3); the burner assembly (1) comprises means for providing at
least two rings of flames from at least two rings of porticos
existing in a spreading cover (3) that rests over the base (2).
2. Burner assembly according to claim 1, CHARACTERIZED in that the
perimeter ring (31) and the disc (32) comprises sinuous perimeters
(34 and 37) constituting the rings of porticos of the assembly
(1).
3. Burner assembly according to claim 1, CHARACTERIZED in that the
porticos of the spreader (3) have any shape or a combination of
shapes in a same ring of porticos or between the existing
rings.
4. Burner assembly according to claim 1, CHARACTERIZED in that the
base (2) is provided with an air supply system and a system for
feeding fuel gas to the internal chamber of expansion (4) of
fuel-air mixture.
5. Burner assembly according to claims 1 and 4, CHARACTERIZED in
that the base (2) is provided with a system of forced feeding of
air to the internal chamber of expansion (4) of fuel-air
mixture
6. Burner assembly according to claims 1, 4 and 5, CHARACTERIZED in
that the forced feeding system of air to the internal chamber of
expansion (4) of fuel-air mixture comprises a fan or a blower or
any machine which performs the same function.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a burner assembly for
cooking equipments, and more specifically to a burner provided with
a spreading cover having two or more portico rings to output
air-fuel mixture, which was developed to provide significant
improvement in thermal efficiency and heat power of the equipment,
in addition to presenting smooth geometry (both in the base and in
the spreading cover) providing greater easiness of cleaning by the
user, and which can also provide a simpler and more economical
constructive process than similar known ones.
BACKGROUND OF THE INVENTION
[0002] As is well known, the burners are components of stoves that
are located close to the cooking table and comprise the elements
responsible for receiving the fuel from the supply source (whether
it a cylinder of liquefied petroleum gas or a public network of
natural gas), mix it to ambient air and release the fuel-air
mixture to burn, when requested by the user.
[0003] As it regards more specifically to the cooking equipment for
domestic use, the burners are usually constituted by devices called
bodies (or bases, as they are also called) having internal cavities
which, when closed by spreading covers constitute chambers in which
occurs the expansion of the mixture of air and fuel from the supply
source. Such a mixture is delivered to perimeter region of the
spreaders, and through openings known as porticos, the fuel-air
mixture can flow out of the internal chamber and be safely burned
in the outer face of the porticos.
[0004] The present invention differs from existing constructions
for presenting more than one flame output ring. In the current
state of the art, there is often only one of flame output ring,
which limits the thermal efficiency of the burner since it does not
allow the distribution of the flames under the entire surface of
the cooking utensil.
[0005] Some types of burners such as those disclosed in documents
CN 2229610 and CN 2835816, allow the generation of two rings of
flames through a crown-shaped construction, wherein each ring
internally defines a mixing chamber containing porticos (or outlet
orifices for the fuel-air mixture) in its integrated upper surface,
which may possibly be coated by a lid (as shown for example in
document CN 2835816). Note, however, that this type of burner
provides a significantly complex constructive aspect of rustic
appearance which requires that for each flame output ring, there is
an independent mixing chamber.
[0006] Analogous construction, which also results in two rings of
flames, can be observed in the burner disclosed by the document CN
2911448 that, despite a more conservative visual aspect and more
proximal to the conventional, also includes an individual mixing
chamber under each spreading cover provided with porticos for
output of air-fuel mixture. This configuration shows a burner of
construction and complex mounting and therefore costly that,
moreover, also requires the manufacture and mounting of two
individual covers of fittings at specific locations of the
piece.
[0007] The document BR PI0112498 provides a construction in which a
burner provided with two crowns of porticos have a single mixing
chamber--but with very limited area due to various internal
structures of the piece--which however still requires the use of
two individual spreading covers on each flame output channel.
Moreover, we note that the construction of the piece is extremely
complex incurring in difficulties in cleaning and maintenance by
users.
[0008] It is noted, however, that the present state of the art
lacks a burner assembly for cooking equipments that enables the
generation of more than one ring of porticos of output of air-fuel
mixture without, therefore, requiring the construction of several
spreading covers and which, moreover, preferably has a single
mixing chamber and having smooth geometry (both in the base and in
the spreading cover and in the porticos) providing greater easiness
of cleaning by the user.
OBJECTIVE OF THE INVENTION
[0009] In view of the foregoing, it is an objective of the present
invention to provide a burner assembly for cooking equipments that
allows a better distribution of flames under the cooking utensil,
resulting in higher thermal efficiency.
[0010] It is a further objective of the invention to provide a
burner which has large total output area of air-fuel mixture by
porticos, allowing work with high heat power.
[0011] Another objective among the objectives of the present
invention is to reveal a burner assembly whose manufacturing
process and installation is simple and therefore not very
expensive.
[0012] Besides these, it is an objective of the invention to
provide a burner assembly for cooking equipments that has smooth
geometry, both in the porticos and in the body, providing easy
cleaning on the part of end users.
SUMMARY OF THE INVENTION
[0013] The present invention achieves the above objectives by means
of a burner assembly for cooking equipments defined by a base
cooperating with a cooking table and on which rests a spreading
cover, and the coupling of the spreading cover on the base yields
an internal chamber for mixture and expansion of the air-fuel
mixture that is released through porticos existing under the
perimeter edge of the spreader.
[0014] In a preferred embodiment of the present invention, said
base comprises in its inner region at least one supply orifice.
[0015] Furthermore, the spreading cover comprises at least one
perimeter ring cooperating with the base and at least one disc
cooperating with the perimeter ring.
[0016] A preferred embodiment of the invention also provides that
the burner assembly preferably comprises a single internal mixing
chamber cooperating with the porticos of the spreading cover.
[0017] In summary, the burner assembly comprises means for
providing at least two flame rings from at least two rings of
porticos existing in a spreading cover.
[0018] Preferably, the perimeter ring and the disc of the spreading
cover comprises sinuous perimeters which constitute the rings of
the porticos of the assembly.
[0019] Optionally, the porticos of the spreader can have any shape
or a combination of shapes in one same ring of porticos or between
the existing rings.
[0020] Also in a preferred embodiment, the porticos of the spreader
have an elliptical shape wherein, however, any geometric
configuration may alternatively be used--in a preferential manner,
smooth geometries capable of providing easiness of cleaning for the
user.
[0021] Preferably, the internal surface of the spreader may
comprise at least one projection for engagement with existing
slot(s) on the base, aiming the correct mounting by the end user,
and wherein an optional construction may provide alternative
positioning of the elements with coupling projection on the base
and slots of the spreader. It should be noted, additionally, the
invention may comprise any other system capable of assisting the
user in the correct assembly of the spreader on the base without
thereby escaping from the desired scope of protection.
[0022] Optionally, the base of the burner may be provided with a
system of feed of any fuel-air mixture into the internal chamber of
expansion of air-fuel mixture, in order to guarantee the supply of
adequate amount of mixture to the combustion of gas that feeds the
flame of the equipment.
[0023] Preferably such air supply system for the internal chamber
of expansion comprises a fan or a blower.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The figures show:
[0025] FIG. 1--shows a perspective view of a burner assembly for
the cooking equipment constructed according to a preferred
embodiment of the present invention;
[0026] FIG. 2--shows an exploded perspective view of the embodiment
illustrated in FIG. 1;
[0027] FIG. 3--shows an elevation view of the embodiment
illustrated in FIG. 1;
[0028] FIG. 4--shows a top view of the embodiment illustrated in
FIG. 1;
[0029] FIG. 5--shows a longitudinal sectional view of the
embodiment illustrated in FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
[0030] The accompanying FIG. 1 shows a general view of burner
assembly constructed according to a preferred embodiment of the
present invention allowing visualization of the base 2 which, in
general, rests on the cooking table M which may also have lower
prolongations (not shown) for connection to the internal components
for interconnection with the supply source of gas and air.
[0031] In the embodiment shown--which, it should be noted, is
illustrative and not restrictive, since the piece can present other
aesthetic configurations without thereby escaping from the scope of
protection claimed in the present application--the base 2 has a
substantially frustoconical format comprising, in its internal
region, a central orifice 22 for the coupling of system for feeding
air-fuel mixture (not shown).
[0032] A spreading cover 3--better shown in FIG. 2--is, in the
exemplary embodiment shown in the appended figures, consisting of a
perimeter ring 31 to the center from which it couples a disc 32
with perimeter surface preferably angled and central region 33
preferably flat.
[0033] The perimeter ring 31 of the spreading cover 3 has perimeter
34 preferably sinuous and having side walls 35 of substantially
frustoconical conformation provided with transverse ribs 36 to
provide better accommodation of the piece on the base 2, resulting
in a first ring of substantially elliptical porticos by which exits
the air-fuel mixture responsible for feeding the flame employed
during the procedures of heating and/or cooking.
[0034] Similarly, the disc 32 also has a sinuous perimeter 37 and
transverse ribs 38 for accommodating the piece of the frustoconical
ring 31 when the perimeter 37 defines a ring of additional
porticos, and increase the exit area of air fuel--and therefore of
flame--also resulting in the increase of heat power of the burner
assembly.
[0035] It should be clarified that the spreader cover 3 may consist
by any number of the pieces or slots resulting in the addition of
multiple rings of porticos, that may result in several
configurations of spreading covers 3, thereby promoting a better
distribution of the flame under the cooking utensil and thus a
significant improvement in thermal efficiency of the equipment.
[0036] As shown in the cross section of FIG. 5, the mounting of
pieces creates, inside the burner assembly 1, an internal chamber 4
in which the fuel-air mixture from the feeding system (not shown)
expands and feeds the flames existing on the outer faces of the
porticos.
[0037] In most known burners, each group of output porticos has an
individual mixture chamber; however, the present invention is
distinguished from the others in that it comprises a single
internal chamber 4 in which the air-fuel mixture is supplied to all
the porticos of the assembly 1, which turns out to standardize the
characteristics of resulting flames.
[0038] It is noteworthy, however, that the burner assembly object
of the present application can also optionally be provided with
multiple mixture chambers.
[0039] With respect to the pollution aspect, the present invention
can optionally be constructed with additional elements to provide
an improved mixture between gas and environment air. Therefore, the
burner assembly 1 may be provided with a feeding system--preferably
forced can, however, also use known systems such as those using the
Venturi effect--air for expansion internal chamber 4 of air fuel,
which may comprise a fan, a blower or any other device capable of
achieving the same purpose. The use of a mechanized system of air
supply to the mixture is capable of achieving conditions of
complete pre-mixture (or any fraction of lack/excess of air) with
which the combustion is more efficient and the economy of gas will
be even greater.
[0040] It is noteworthy that although there have been shown
preferable constructive forms of the present invention, it is
understood that any omissions, substitutions and constructive
alterations can be made by a person skilled in the art without
departing from the spirit and scope of required protection. It is
also expressly stated that all combinations of the elements which
perform the same function in substantially the same way to achieve
the same results are within the scope of the invention.
Substitutions of elements of a type described by others are also
fully intended and contemplated.
[0041] It should, however, be understood that the description given
based on the figures mentioned above only refers to some of the
possible embodiments for the system of the present invention,
wherein the real scope of the present invention is provided in the
appended claims.
* * * * *