U.S. patent application number 14/126375 was filed with the patent office on 2014-05-01 for gas burner for a household appliance.
This patent application is currently assigned to ORKLI S.COOP.. The applicant listed for this patent is Mikel Arizmendi Zurutuza, Marcos Pablo Curto. Invention is credited to Mikel Arizmendi Zurutuza, Marcos Pablo Curto.
Application Number | 20140120480 14/126375 |
Document ID | / |
Family ID | 46246081 |
Filed Date | 2014-05-01 |
United States Patent
Application |
20140120480 |
Kind Code |
A1 |
Arizmendi Zurutuza; Mikel ;
et al. |
May 1, 2014 |
Gas burner for a household appliance
Abstract
A compact thermoelectric safety actuator having a first body
with a first cavity and a second body with a second cavity. The
first and second bodies are connected so that the first and second
cavities are arranged facing and open to one another. The first
body has a gas outlet and the second body has a gas inlet in fluid
communication with the gas outlet through the second cavity, An
electromagnet of the actuator has a first end portion residing in
the first cavity and a second end portion residing in the second
cavity. A rotatable arm has a first end with a ferromagnetic frame
adapted to engage the second portion of the electromagnet and a
second end coupled to a sealing member, each of the tilting arm,
ferromagnetic frame and sealing member are arranged in the second
cavity. The first sealing member is configured to seat against a
seating located on the first body when the arm is in a rest
position, the first seating being located between the gas outlet
and the second cavity.
Inventors: |
Arizmendi Zurutuza; Mikel;
(Ordizia, ES) ; Pablo Curto; Marcos; (Hernani,
ES) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Arizmendi Zurutuza; Mikel
Pablo Curto; Marcos |
Ordizia
Hernani |
|
ES
ES |
|
|
Assignee: |
ORKLI S.COOP.
Ordizia
ES
|
Family ID: |
46246081 |
Appl. No.: |
14/126375 |
Filed: |
June 11, 2012 |
PCT Filed: |
June 11, 2012 |
PCT NO: |
PCT/EP2012/061018 |
371 Date: |
December 13, 2013 |
Current U.S.
Class: |
431/80 ;
137/66 |
Current CPC
Class: |
F23D 14/725 20130101;
F23N 2235/24 20200101; F23N 2231/06 20200101; F23N 2235/14
20200101; F23D 2208/10 20130101; F23D 14/583 20130101; F23N 5/105
20130101; F23N 5/245 20130101; F23K 2900/05002 20130101; F23N 1/005
20130101; F23D 14/105 20130101; Y10T 137/1516 20150401 |
Class at
Publication: |
431/80 ;
137/66 |
International
Class: |
F23N 5/24 20060101
F23N005/24 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 15, 2011 |
ES |
P201131008 |
Claims
1-15. (canceled)
16. A thermoelectric safety actuator comprising: a first body
having a first cavity and a second body having a second cavity, the
first and second bodies being connected so that a gas-tight seal
exists between a first contact surface of the first body a second
contact surface of the second body and so that the first and second
cavities are arranged facing and open to one another, the first
body having a gas outlet, the second body having a gas inlet in
fluid communication with the gas outlet through the second cavity,
an electromagnet comprising a first end portion with a first end
and a second end portion with a second end, the first end portion
residing in the first cavity of the first body and the second end
portion residing in the second cavity of the second body, a tilting
arm rotatable between a rest position when the electromagnet is
de-energized and an activation position when the electromagnet is
energized, the tilting arm comprising a moving part with a first
end having a ferromagnetic frame and a second end coupled to a
first sealing member, each of the tilting arm, ferromagnetic frame
and first sealing member arranged in the second cavity of the
second body, the first sealing member adapted to seat against a
first seating located on the first body when the tilting arm is in
the rest position, the first seating being located between the gas
outlet and the second cavity, in the rest position the
ferromagnetic frame of the tilting arm is located a distance apart
from the second end of the electromagnet, in the activation
position the ferromagnetic frame of the tilting arm being located
against the second end of the electromagnet with the first sealing
member being located apart from the first seating on the first
body.
17. A thermoelectric safety actuator according to claim 16, wherein
an outside portion of the first body is configured to be attached
directly to a casing of a gas burner.
18. A thermoelectric safety actuator according to claim 17, wherein
the gas outlet is configured to be directly connected to an inlet
of an injector located in the gas burner casing.
19. A thermoelectric safety actuator according to claim 16, wherein
the gas inlet and gas outlet are arranged substantially parallel to
one another.
20. A thermoelectric safety actuator according to claim 16, wherein
the first cavity of the first body and the gas outlet are arranged
substantially parallel to one another.
21. A thermoelectric safety actuator according to claim 19, wherein
the first cavity of the first body and the gas outlet are arranged
substantially parallel to one another.
22. A thermoelectric safety actuator according to claim 16, wherein
the first seating comprises a portion of the first body which
projects into the second cavity of the second body.
23. A thermoelectric safety actuator according to claim 16, wherein
a third cavity is provided on an outside of the first body, the
third cavity being arranged substantially coaxial with the first
cavity, there being located in the third cavity a connection
terminal connected to the electromagnet.
24. A thermoelectric safety actuator according to claim 16, wherein
the tilting arm is urged toward the rest position by a resilient
member residing in the second cavity of the second body.
25. A thermoelectric safety actuator according to claim 16, further
comprising a safety shut-off valve having an electromagnetic unit,
the electromagnetic unit located at least partially in the interior
of the second body and comprising a movable member that moves
between a first position when the electromagnet unit is energized
and a second position when the electromagnetic unit is
de-energized, the safety shut-off valve having a second sealing
member that is connected with the moveable member, the second body
having a second seating located between the gas inlet and the
second cavity of the second body, when the electromagnetic unit is
energized the second sealing member is positioned away from the
second seating so as to permit a gas flow between the gas inlet and
the second cavity of the second body, when the electromagnetic unit
is de-energized the second sealing member is positioned against the
second seating so as to prevent a gas flow between the gas inlet
and the second cavity of the second body.
26. A thermoelectric safety actuator according to claim 25, wherein
the gas inlet and the gas outlet are arranged substantially
orthogonal to one another.
27. A gas burner assembly for a gas appliance comprising: a burner
casing, an injector situated in the burner casing configured to
introduce a gas into the burner, the injector having a gas inlet
and a gas outlet, a thermoelectric safety actuator arranged fixed
to the casing and comprising: a first body having a first cavity
and a second body having a second cavity, the first and second
bodies being connected so that a gas-tight seal exists between a
first contact surface of the first body a second contact surface of
the second body and so that the first and second cavities are
arranged facing and open to one another, the first body having a
gas outlet, the second body having a gas inlet in fluid
communication with the gas outlet through the second cavity, the
gas outlet being connected to the gas inlet of the injector via a
gas-tight connection, an electromagnet comprising a first end
portion with a first end and a second end portion with a second
end, the first end portion residing in the first cavity of the
first body and the second end portion residing in the second cavity
of the second body, a tilting arm rotatable between a rest position
when the electromagnet is de-energized and an activation position
when the electromagnet is energized, the tilting arm comprising a
moving part with a first end having a ferromagnetic frame and a
second end coupled to a first sealing member, each of the tilting
arm, ferromagnetic frame and first sealing member arranged in the
second cavity of the second body, the first sealing member adapted
to seat against a first seating located on the first body when the
tilting arm is in the rest position, the first seating being
located between the gas outlet and the second cavity, in the rest
position the ferromagnetic frame of the tilting arm is located a
distance apart from the second end of the electromagnet, in the
activation position the ferromagnetic frame of the tilting arm
being located against the second end of the electromagnet with the
first sealing member being located apart from the first seating on
the first body.
28. A gas burner assembly according to claim 27, further comprising
a thermocouple arranged adjacent the burner and adapted to supply
power to the electromagnet when a flame is present in the
burner.
29. A gas burner assembly according to claim 27, wherein the gas
inlet and gas outlet of the thermoelectric safety actuator are
arranged substantially parallel to one another.
30. A gas burner assembly according to claim 27, wherein the first
cavity of the first body and the gas outlet are arranged
substantially parallel to one another.
31. A gas burner assembly according to claim 29, wherein the first
cavity of the first body and the gas outlet are arranged
substantially parallel to one another.
32. A gas burner assembly according to claim 27, wherein the gas
outlet of the thermoelectric safety actuator is directly coupled to
the gas inlet of the injector.
33. A gas burner assembly according to claim 27, wherein the first
seating comprises a portion of the first body which projects into
the second cavity of the second body.
34. A gas burner assembly according to claim 27, wherein a third
cavity is provided on an outside of the first body, the third
cavity being arranged substantially coaxial with the first cavity,
there being located in the third cavity a connection terminal
connected to the electromagnet.
35. A gas burner assembly according to claim 28, wherein a third
cavity is provided on an outside of the first body, the third
cavity being arranged substantially coaxial with the first cavity,
there being located in the third cavity a connection terminal
connected to the electromagnet, the thermocouple being electrically
coupled to the connection terminal.
36. A gas burner assembly according to claim 27, wherein the
tilting arm is urged toward the rest position by a resilient member
residing in the second cavity of the second body.
37. A gas burner assembly according to claim 27, wherein the
thermoelectric safety actuator further comprising a safety shut-off
valve having an electromagnetic unit, the electromagnetic unit
located at least partially in the interior of the second body and
comprising a movable member that moves between a first position
when the electromagnet unit is energized and a second position when
the electromagnetic unit is de-energized, the safety shut-off valve
having a second sealing member that is connected with the moveable
member, the second body having a second seating located between the
gas inlet and the second cavity of the second body, when the
electromagnetic unit is energized the second sealing member is
positioned away from the second seating so as to permit a gas flow
between the gas inlet and the second cavity of the second body,
when the electromagnetic unit is de-energized the second sealing
member is positioned against the second seating so as to prevent a
gas flow between the gas inlet and the second cavity of the second
body.
38. A gas burner assembly according to claim 37, wherein the gas
inlet and the gas outlet are arranged substantially orthogonal to
one another.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The Present application relates to and claims the benefit
and priority to PCT/EP2012/061018, filed Jun. 11, 2012 which claims
the benefit and priority to Spanish Patent Application No.
P201131008, filed Jun. 15, 2011.
TECHNICAL FIELD
[0002] The invention relates to a gas burner for a household
appliance, in particular for an oven, stoves or other household
appliance that are preferably supplied with natural gas or LPG.
BACKGROUND
[0003] There are known gas burners for household appliances that
include thermoelectric safety devices that close the passage of gas
towards the burner in the absence of flame. Thermoelectric safety
devices comprise magnetic units connected to a corresponding
thermocouple, with the result that for as long as there is a flame
in the burner, the corresponding flame thermocouple keeps the
corresponding magnetic unit energized, and as a result, the
thermoelectric device allows the passage of gas towards the burner.
In the absence of flame, the thermocouple cools and is not able to
maintain the delivery of power to the magnetic unit, as a result of
which the magnetic unit is de-energized, closing the passage of gas
towards the burner.
[0004] From the moment the burner is lit until the thermocouple is
able to keep the magnetic unit energized a period of time elapses,
as a result of which it is necessary that the thermoelectric device
comprises auxiliary means that, once the magnetic unit has been
reset manually, allow the magnetic unit to be kept energized until
the thermocouple is able to do so by itself.
[0005] In general terms, thermoelectric safety devices are arranged
removed from the burner close to the controls as described in U.S.
Pat. No. 6,886,581 B2. The magnetic unit is arranged housed in a
gas valve body, the magnetic unit being substantially aligned with
a shaft of the valve body, with the result that the user must
activate the control of the valve body coupled to the shaft so that
said shaft acts on the magnetic unit, keeping it in the open or
passage-of-gas position until the thermocouple, arranged close to a
burner injector, is able to keep said magnetic unit energized.
SUMMARY OF THE DISCLOSURE
[0006] According to one implementation a gas burner is provided
that comprises at least one casing, at least one thermocouple, at
least one injector supplied with a gas and fixed to the casing, and
at least one thermoelectric safety actuator adapted to open or
close the passage of gas towards the injector. The thermoelectric
safety actuator is arranged fixed to the casing and comprises a
body, at least one inlet gas conduit, at least one outlet gas
conduit connected to the injector, at least one electromagnet
housed in the inside of the body and arranged connected to the
thermocouple, at least one tilting arm that is arranged fixed with
a frame on one end and a sealing member on the opposite end. The
arm tilts between a rest position in which the passage of gas from
the inlet conduit towards the outlet conduit is closed by means of
said sealing member, and an activation position, in which the
electromagnet is energized and the passage of gas open, the
electromagnet being energized initially by auxiliary energization
means and being kept energized by said auxiliary energization means
until the thermocouple is able to keep said electromagnet
energized.
[0007] As a result, an optimised and compact gas burner is
obtained, and which comprises the thermoelectric safety actuator
close to the injector and the thermocouple, thereby reducing the
lengths and the number of conduits necessary. A burner with fewer
load losses is also obtained.
[0008] These and other advantages and characteristics will be made
evident in the light of the drawings and the detailed description
thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 shows a view in perspective of a burner according to
one embodiment.
[0010] FIG. 2 shows a sectional view of the burner shown in FIG.
1.
[0011] FIG. 3 shows a sectional view of a safety actuator comprised
in the burner shown in FIG. 1.
[0012] FIG. 4 shows a view in perspective of a safety actuator
comprised in the burner shown in FIG. 1.
[0013] FIG. 5 shows a sectional view of a safety actuator of a
burner according to a second embodiment.
[0014] FIG. 6 shows a view in perspective of the safety actuator
shown in FIG. 5.
[0015] FIG. 7 shows a view in perspective of a safety actuator of a
burner according to a third embodiment.
DETAILED DESCRIPTION
[0016] FIG. 1 shows a first embodiment of a gas burner 1 of a
cooking appliance, preferably of an oven or a gas stove, which
comprises a casing 5, a thermocouple 4, an injector 2 supplied with
a gas and fixed to the casing 5, and a mixing conduit 6 connected
to the injector 2, wherein the gas that arrives through the
injector 2 is mixed with the air, said mixture exiting through
holes 6c arranged along a substantially flat surface 6b of the
mixing conduit 6. The gas burner 1 also comprises a spark plug 3,
arranged substantially parallel to the substantially flat surface
6b of the mixing conduit 6, which causes the necessary spark in the
gas burner 1 to cause the ignition of the gas and air mixture, the
spark plug 3 being activated by auxiliary energization means.
[0017] In the embodiment shown in FIGS. 1 and 2, the thermocouple 4
and the spark plug 3 are arranged substantially parallel to each
other, being extended on the substantially flat surface 6b by a
certain distance. Both the thermocouple 4 and the spark plug 3 are
arranged fixed to the casing 5, in particular to respective
extensions 5a, 5c of the casing 5 substantially in the shape of an
L.
[0018] The gas burner 1 also comprises a thermoelectric safety
actuator 20, shown in detail in FIGS. 3 and 4, adapted to open or
close the passage of gas towards the injector 2. The thermoelectric
safety actuator 20 is arranged fixed to the casing 5 and comprises
an inlet gas conduit 23, an outlet gas conduit 25, a body 21,22
inside which is housed an electromagnet 36 adapted to be connected
to the thermocouple 4, a tilting arm 38 on one of the ends of which
is arranged fixed a frame 37 and on the other end of which is
arranged fixed a sealing member 35, the tilting arm 38 tilting
between a rest position in which the passage of gas from the inlet
conduit 23 towards the outlet conduit 25 is closed by means of said
sealing member 35, and an activation position in which the
electromagnet 36 is energized by the thermocouple 4 and the passage
of gas is open. The electromagnet 36 is energized initially by
auxiliary energization means, it being kept energized by said
auxiliary energization means until the thermocouple 4 is able to
keep said electromagnet 36 energized by itself.
[0019] In the embodiment shown in FIGS. 1 and 2, the injector 2 is
arranged coupled to the thermoelectric safety actuator 20.
[0020] According to one implementation the electromagnet 36
includes a core 36a, preferably in the shape of a U, and a single
coil 36b wound around the core 36a. The frame 37 is ferromagnetic
and closes against free transverse surfaces 36c of the core 36a
when said electromagnet 36 is energized by the thermocouple 4.
[0021] The body 21, 22 of the thermoelectric safety actuator 20,
shown in detail in FIGS. 3 and 4, comprises a first member 22 that
comprises the outlet conduit 25, and a second member 21 that
comprises the inlet conduit 23. According to one implementation
both the first member 22 and the second member 21 are substantially
cylindrical, each one of them comprising a substantially flat
contact surface 21a, 22a on which are fixed both members 21, 22.
According to on implementation the inlet conduit 23 and the outlet
conduit 25 are arranged substantially parallel to each other. The
second member 21 comprises a groove 30 that extends along a closed
contour on the contact surface 21a, there being housed in said
groove 30 a gasket 29 that seals the closure between both contact
surfaces 21a, 22a. The first member 22 and the second member 21
each have ears 22b, 21b, shown in FIG. 1, with respective holes
through which the first member 22 and the second member 21 are
fixed to each other by means of fixing means, said fixing means
comprising in the embodiment shown in FIGS. 1 and 4, respective
screws 32.
[0022] According to one implementation the first member 22
comprises a substantially cylindrical first housing 27, in which is
partially housed the electromagnet 36 projecting out partially in
relation to the support surface 22a, and a seating 28 that projects
out in relation to the support surface 22a, from one end of the
outlet conduit 25. According to one implementation the first
housing 27 and the outlet conduit 25 are arranged substantially
parallel to each other. The injector 2 is arranged coupled to the
outlet conduit 25 of said thermoelectric safety actuator 20.
[0023] According to one implementation the first housing 27
includes a first part 27a with a smaller cross-section in which is
housed supported one end of the core 36a of the electromagnet 36.
Additionally, the first member 22 comprises a second housing 26,
substantially coaxially to the first housing 27, which extends from
a base 22c, substantially parallel and opposite to the support
surface 22a, the first housing 27 being connected to the outside of
the first member 22. In said second housing 26 is arranged inserted
a connection terminal 31 connected to one end 36d of the coil 36b
and a gasket 33 that seals said second housing 26. The connection
terminal 31 projects out in relation to the base 22c, it being
adapted to be connected by a connection terminal 7b of a cable 7 to
the thermocouple 4 as shown in FIG. 1.
[0024] In addition, the second member 21 comprises a housing 24 in
which is partially housed the tilting arm 38 along with the frame
37 and the sealing member 35. The tilting arm 38 is arranged fixed
to the first member 22 by fixing means. In the embodiment shown,
the fixing means comprise screws 34, shown in FIG. 3, although in
other embodiments they may comprise another type of known fixing
means. The tilting arm 38 has a fixed first part 38a and a second
part 38b that is movable in relation to said first part 38a, there
being arranged on the second part 38b, which is substantially flat,
the frame 37 and the sealing member 35.
[0025] The tilting arm 38 also comprises elastic means arranged
between the first part 38a and the second part 38b, which allows
the tilting arm 38 to be returned from the activation position, in
which the frame 37 is in contact with the core 36a of the
electromagnet 36, to the rest position in which a substantially
flat surface 35b of the sealing member 35 closes, against the
seating 28 to prevent the passage of gas towards the outlet conduit
25. The elastic means comprise a compression spring 39, the spring
39 being arranged coupled to the first part 38a by a projection 38f
and to the second part 38b by the corresponding projection 38e,
shown in FIG. 3. Furthermore, the second part 38b has tabs 38c,
shown in FIG. 3, each one of which cooperates with a corresponding
groove 38d that extends along the first part 38a, in a direction
substantially orthogonal to the second part 38b, guiding the
movement and the rotation of the second part 38b in relation to the
first part 38a.
[0026] When the user activates a control to light the corresponding
burner 6, the control sends the corresponding command to an
electronic driver so that it provides the necessary electrical
energy to the electromagnet 36 for it to be energized, attracting
the frame 37 without the need for the user to act directly on the
electromagnet by having to move the frame 37 against the
electromagnet 36 manually. The electronic driver provides the
electrical energy necessary to attract the frame 37 towards the
electromagnet 36 and keep it energized for a specific period of
time while it acts on the spark plug 3 so that the necessary sparks
are generated. If the flame has been lit, the thermocouple 4 is
heated, generating in turn electrical energy with which the
electromagnet 36 is supplied so that it remains energized while
there is a flame. As soon as there is no flame or when the flame is
insufficient for the thermocouple 4 to generate enough electrical
energy to keep the electromagnet 36 energized, the tilting arm 38
of the actuator 20 moves into the rest position, closing the
passage of gas towards the burner 6.
[0027] In a second embodiment of the gas burner, not shown as a
whole in the figures, the gas burner is adapted to a household oven
with grill for its operation as a conventional oven or with the
grill function, comprising a casing, a thermocouple, a spark plug,
an injector for supplying a gas and fixed to the casing, and a
mixing conduit connected to the injector, wherein the gas that
arrives through the injector is mixed with the air, of similar
characteristics to the gas burner 1 described in the first
embodiment and shown in FIGS. 1 and 2. The gas burner of the second
embodiment also comprises the following additional members: a
thermocouple, an injector, a spark plug, a mixing conduit and a
support similar to the one described above, as a result of which
they will not be described in detail. Said additional members will
be used when the oven operates with the grill function. The gas
burner of this second embodiment comprises a single thermoelectric
safety actuator 40, shown in FIGS. 5 and 6, which supplies both
injectors, and is described below.
[0028] The thermoelectric safety actuator 40 comprises a body 41,42
that has two first members 42, similar to the first member 22
described in the first embodiment, and shown in detail in FIG. 4,
and an intermediate member 41 arranged between both first members
42.
[0029] Each first member 42 comprises an outlet conduit 45, while
the intermediate member 41 comprises an inlet conduit 43. According
to one implementation the inlet conduit 43 is substantially
orthogonal to the outlet conduits 45. According to one
implementation both the first members 42 and the intermediate
member 41 are substantially cylindrical, each one of them
comprising, on one end, a substantially flat contact surface
41a,42a on which first members 42 are fixed to each other by the
intermediate member 41. The intermediate member 41 comprises a
groove 50 that extends along a closed contour in each of the two
contact surfaces 41a, there being housed in said groove 50 a
respective gasket 49 that seals the closure between both contact
surfaces 41a,42a. The intermediate member 41 and the first members
42 each have ears 41b,42b, shown in FIG. 6, with respective holes
through which the first members 42 are fixed to the intermediate
member 41 by respective screws 52.
[0030] According to one implementation each first member 42
comprises a substantially cylindrical first housing 47 in which is
partially housed an electromagnet 56 projecting out partially in
relation to the support surface 42a, and a seating 48 that projects
out in relation to the support surface 42a from one end of the
outlet conduit 45. According to one implementation the first
housing 47 and the outlet conduit 45 are arranged substantially
parallel to each other. Each injector is coupled to the outlet
conduit 45 of the corresponding first member 42 of said
thermoelectric safety actuator 40.
[0031] Additionally, the first housing 47 includes a first part 47a
with a smaller cross-section in which is housed supported one end
of a core 56a of the electromagnet 56. In addition, the first
member 42 comprises a second housing 46, substantially coaxially to
the first housing 47, which extends from a base 42c, substantially
parallel and opposite to the support surface 42a, and which is
connected to the outside of the first member 42. In said second
housing 46 a connection terminal 51 is arranged inserted, connected
to one end 56d of a coil 56b of the electromagnet 56, and a gasket
53 that seals said second housing 46. The connection terminal 51
projects out in relation to the base 42c, it being adapted to be
connected by a respective connection terminal to the respective
thermocouple.
[0032] Furthermore, the intermediate member 41 comprises a housing
44 in which tilting arms 58 along with frames 57 and respective
sealing members 55 are partially housed.
[0033] Each tilting arm 58, similar to the arm 38 of the first
embodiment, is arranged fixed to the first member 42 by means of
fixing means that comprise, in the embodiment shown in FIG. 5,
screws 54. Each tilting arm 58 has a fixed first part 58a and a
second part 58b that is movable in relation to said first part 58a,
the frame 57 and the sealing member 55 being arranged fixed on each
end of the second part 58b, which, according to one implementation,
is substantially flat.
[0034] Each tilting arm 58 also comprises elastic means arranged
between the first part 58a and the second part 58b, which allow the
tilting arm 58 to be returned from the activation position, in
which the corresponding frame 57 is in contact with the core 56a of
the corresponding electromagnet 56, to the rest position in which a
substantially flat surface 55b of the sealing member 55 closes
against a seating 48 of the first member 42 to prevent the passage
of gas towards the corresponding outlet conduit 45. The elastic
means comprise a compression spring 59, the spring 59 being
arranged coupled to the first part 58a by a projection 58e and to
the second part 58b by the corresponding projection 58f, as shown
in FIG. 5. In addition, the second part 58b has tabs, not shown in
the figures, similar to those described in the first embodiment,
each one of which cooperates with a corresponding groove 58d that
extends in the first part 58a in a direction substantially
orthogonal to the second part 58b, guiding the movement and the
rotation of the second part 58b in relation to the first part
58a.
[0035] The thermoelectric safety actuator 40 is arranged coupled to
a ramp through which the gas is supplied, the gas being supplied
from the respective inlet conduit 43 to the respective
injector.
[0036] In a third embodiment of the invention, the gas burner is
similar to the one shown in FIG. 1, comprising the members
described in the first embodiment, the thermoelectric safety
actuator 20 shown in FIGS. 1 to 4 being replaced by the
thermoelectric safety actuator 60 shown in FIG. 7 and which is
described below.
[0037] The thermoelectric safety actuator 60 is arranged fixed to
the casing 5 and comprises an inlet gas conduit 63, an outlet gas
conduit 65, a body 61,62 inside which is housed an electromagnet 76
adapted to be connected to the thermocouple 4, a tilting arm 78 on
one of the ends of which is arranged fixed a frame 77 and on the
other end of which is arranged fixed a sealing member 75, the
tilting arm 78 tilting between a rest position in which the passage
of gas from the inlet conduit 63 towards the outlet conduit 65 is
closed by means of said sealing member 75 and an activation
position, in which the electromagnet 76 is energized by the
thermocouple 4 and the passage of gas is open. The electromagnet 76
is energized initially by auxiliary energization means, it being
kept energized by said auxiliary energization means until the
thermocouple 4 is able to keep said electromagnet 76 energized.
[0038] According to one implementation the electromagnet 76
includes a core 76a, preferably in the shape of a U, and a single
coil 76b wound around the core 76a. The frame 77 is ferromagnetic
and closes against free transverse surfaces 76c of the core 76a
when said electromagnet 76 is energized by the thermocouple 4.
[0039] Furthermore, the body 61,62 of the thermoelectric safety
actuator 60 comprises a first member 62 that comprises the outlet
conduit 65, and a second member 61 that comprises the inlet conduit
63. According to one implementation both the first member 62 and
the second member 61 are substantially cylindrical, each one of
them comprising a substantially flat contact surface 61a,62a on
which are fixed both members 61,62. The second member 61 comprises
a groove 70 that extends along a closed contour on the contact
surface 61a, there being housed in said groove 70 a gasket 69 that
seals the closure between both contact surfaces 61a,62a. According
to one implementation the first member 61 and the second member 62
each have ears, not shown in the figures and similar to those of
the safety actuator 20 of the first embodiment, by means of which
the first member 62 and the second member 61 are fixed to each
other.
[0040] According to one implementation the first member 62
comprises a substantially cylindrical first housing 67 in which is
partially housed the electromagnet 76 projecting out partially in
relation to the support surface 62a, and a seating 68 that projects
out in relation to the support surface 62a from one end of the
outlet conduit 65. According to one implementation the first
housing 67 and the outlet conduit 65 are arranged substantially
parallel to each other. The injector 2 is arranged coupled to the
outlet conduit 65 of said thermoelectric safety actuator 60.
[0041] Additionally, the first housing 67 includes a first part 67a
with a smaller cross-section in which is housed supported one end
of the core 76a of the electromagnet 76. In addition, the first
member 62 comprises a second housing 66, substantially coaxially to
the first housing 67, which extends from a base 67b arranged on the
opposite end to the support surface 62a, and which is connected to
the outside of the first member 62. In said second housing 66 is
arranged inserted a connection terminal 71 connected to one end 76d
of the coil 76b and a gasket 73 that seals said second housing 66.
According to one implementation the connection terminal 71 projects
out in relation to the base 67b, the connection terminal 71 being
adapted to be connected by a connection terminal 7b of a cable 7 to
the thermocouple 4, as shown in FIG. 1.
[0042] Furthermore, the second member 61 comprises a housing 64 in
which is at least partially housed the tilting arm 78 along with
the frame 77 and the sealing member 75.
[0043] The tilting arm 78 is arranged fixed to the first member 62
in a similar way to that described in the first embodiment. The
tilting arm 78 has a fixed first part 78a and a second part 78b
that is movable in relation to said first part 78a, there being
arranged fixed on the second part 78b, which is, according to one
implementation, substantially flat, the frame 77 and the sealing
member 75.
[0044] The tilting arm 78 also comprises elastic means arranged
between the first part 78a and the second part 78b, which allow the
tilting arm 78 to be returned from the activation position in which
the frame 77 is in contact with the core 76a of the electromagnet
76 to the rest position in which a substantially flat surface 75a
of the sealing member closes, against the seating 68 to prevent the
passage of gas towards the outlet conduit 65. According to one
implementation the elastic means comprise a compression spring 79,
the spring 79 being arranged coupled to the first part 78a by a
projection 78e and to the second part 78b by the corresponding
projection 78f. In addition, the second part 78b has tabs, not
shown in FIG. 7, similar to the tabs shown in FIG. 3, described in
the first embodiment, each one of which cooperates with a
corresponding groove 78d that extends in the first part 78a, the
grooves 78d extending in a direction substantially orthogonal to
the second part 78b guiding the movement and the rotation of the
second part 78b in relation to the first part 78a.
[0045] The thermostatic safety actuator 60 also comprises an
electromagnetic unit 81, which is known in the art and will not
therefore be described in detail. The electromagnetic unit 81 is
arranged housed at least partially in a second housing 85 of the
second member 61 of the body 61,62. According to one implementation
said second housing 85 is arranged substantially coaxially to the
first housing 64, the second housing 85 including a seating 84
against which it closes a sealing member 82 of electromagnetic unit
81 in a disconnection position when said electromagnetic unit 81 is
not supplied with electrical energy. The electromagnetic unit 81 is
arranged inserted in the second member 61, the thermostatic safety
actuator 60 including a closure member 83 that is arranged threaded
to an outer surface of the second housing 85 and which keeps the
magnetic unit 81 inside said second housing 85. In this embodiment,
the inlet gas conduit 63 connects to the second housing 85 of the
second member 61. According to one implementation the inlet conduit
63 is arranged substantially orthogonal to the outlet conduit
65.
[0046] The thermostatic safety actuator 60 described in this
embodiment provides a double safety aspect, as firstly, when there
is no flame or when the flame is not sufficient for the
thermocouple 4 to generate enough energy to keep the electromagnet
76 energized, the sealing member 75 closes against the seating 68
the outlet conduit 65, with no gas being supplied to the injector
2, which is arranged inserted partially in the outlet conduit 65.
Secondly, in the event of a power cut, the electromagnetic unit 81
ensures the supply of gas to the injector 2 is cut, as the sealing
member 82 of the electromagnetic unit 81 closes, against the
seating 84, the passage of gas towards the outlet conduit 65.
[0047] Finally, although in the embodiments shown it is the spark
plug that causes the spark, in other embodiments not shown in the
figures other ignition means may be used.
* * * * *