ES2395536B1 - Gas burner for a household appliance - Google Patents

Abstract

Gas burner for a domestic appliance comprising a housing (5), a thermocouple (4), an injector (2) attached to the housing (5), and a thermoelectric safety actuator (20) adapted to open or close the passage of gas to the injector (2). The actuator (20) is arranged fixed to the casing (5) and comprises a body (21, 22), a gas inlet duct (23), a gas outlet duct (25) communicated with the injector (2) , an electromagnet (36) housed inside the body (21, 22) and arranged connected to the thermocouple (4), a swing arm (38) that has an armature (37) and a shutter (35) fixed, tilting the arm (38) between a rest position where the gas passage to the outlet duct (25) is closed and an activation position, where the electromagnet (36) is energized and the gas passage open.

Description

DESCRIPTION

"Gas burner for a domestic appliance"

TECHNICAL SECTOR

5

The present invention relates to a gas burner for a household appliance, in particular for an oven, stoves, or other household appliances that are preferably supplied with natural gas or LGP gas.

PREVIOUS STATE OF THE TECHNIQUE

1 or 15

Gas burners for household appliances are known which include thermoelectric safety devices that shut off the gas passage to the burner in the absence of a flame. Thermoelectric safety devices comprise magnetic groups associated with a corresponding thermocouple, so that as long as there is a flame in the burner, the corresponding flame thermocouple keeps the corresponding magnetic group energized, and consequently, the thermoelectric device allows the passage of gas towards the burner. In the absence of a flame, the thermocouple cools, not being able to keep the magnetic group powered, with which the magnetic group is de-energized, closing the gas passage to the burner.

twenty

From the moment the burner is lit until the thermocouple is capable of keeping the magnetic group energized, some time passes, so it is necessary for the thermoelectric device to comprise auxiliary means that, once the magnetic group has been manually reset, allow to maintain energized the magnetic group until the thermocouple is able to do it by itself.

25 30

In general, thermoelectric safety devices are located away from the burner, close to the control knobs, as described in US 6,886,581 B2. The magnetic group is arranged housed in a gas valve body arranged in a magnetic group substantially aligned with an axis of the valve body, so that the user must actuate the control of the valve body coupled to the shaft, so that said axis acts on the magnetic group keeping it in the open or gas passage position until the thermocouple, arranged next to a burner injector, is able to keep said magnetic group energized.

STATEMENT OF THE INVENTION

The object of the invention is to provide a gas burner for a household appliance as defined in the claims.

5

The gas burner according to the invention 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.

1 or 15

The thermoelectric safety actuator is arranged fixed to the housing and comprises a body, at least one gas inlet duct, at least one gas outlet duct connected to the injector, at least one electromagnet housed inside the body and arranged connected at the thermocouple, at least one swing arm that has an armature fixed at one end and a shutter at the opposite end. The arm swings between a rest position where the gas passage from the inlet duct to the outlet duct is closed by said shutter, and an activation position, where the electromagnet is energized and the gas path is open, being the electromagnet initially energized by an auxiliary energizing means and maintained energized by said auxiliary energizing means until the thermocouple is capable of maintaining said electromagnet energized.

twenty

In this way, an optimized and compact gas burner is obtained, which integrates the thermoelectric safety actuator close to the injector and the thermocouple, minimizing the lengths as well as the number of tubes required. In addition, a burner with lower pressure losses is obtained.

25

These and other advantages and characteristics of the invention will become apparent in view of the figures and the detailed description of the invention.

DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of an embodiment of a burner according to the invention.

FIG. 2 shows a sectional view of the burner shown in FIG. one.

30

FIG. 3 shows a sectional view of a safety actuator comprised in the burner shown in FIG. one.

The

FIG. 4 shows a view in perspective of a actuator of security

comprised in the burner shown in FIG. one.

FIG. 5 shows a sectional view of a safety actuator comprised in a second embodiment of a burner according to the invention.

5

FIG. 6 shows a perspective view of the safety actuator shown in FIG. 5.

FIG. 7 shows a perspective view of a safety actuator comprised in a third embodiment of a burner according to the invention.

DETAILED STATEMENT OF THE INVENTION

1 or 15 20

In Fig. 1, a first embodiment of a gas burner 1 of a cooking apparatus, preferably of a gas oven or stove, is shown, comprising a casing 5, a thermocouple 4, an injector 2 fed with a gas and fixed to the casing 5, and a mixing duct 6 communicated with the injector 2, where the gas that comes through the injector 2 is mixed with the air, said mixture leaving through holes 6c arranged along a substantially flat surface 6b of the mixing duct 6. The gas burner 1 further comprises a spark plug 3, arranged substantially parallel to the substantially flat surface 6b of the mixing duct 6, which causes the necessary spark in the gas burner 1 to ignition of the gas and air mixture occurs, the spark plug 3 being activated through auxiliary energizing means.

25

In the embodiment shown in Figures 1 and 2, the thermocouple 4 and the spark plug 3 are arranged substantially parallel to each other, extending on the substantially flat surface 6b at a certain distance. Both the thermocouple 4 and the spark plug 3 are arranged attached to the housing 5, in particular to respective extensions 5a, 5c of the housing 5 in substantially L-shape.

30

The gas burner 1 further comprises a thermoelectric safety actuator 20, shown in detail in Figures 3 and 4, adapted to open or close the gas passage towards the injector 2. The thermoelectric safety actuator 20 is arranged fixed to the casing 5 and comprises a gas inlet duct 23, a gas outlet duct 25, a body 21,22 inside which an electromagnet 36 adapted to be connected to thermocouple 4 is housed, a swing arm 38 at one end of which is it has fixed an armature 37 and at the other end a shutter 35 is fixed, tilting the swing arm 38 between a rest position where the passage of gas from the inlet duct 23 towards the duct

outlet 25 is closed by said shutter 35 and an activation position, where the electromagnet 36 is energized by the thermocouple 4 and the open gas passage. The electromagnet 36 is initially energized by an auxiliary energizing means, being maintained energized by said auxiliary energizing means until the thermocouple 4 is able to maintain said electromagnet 36 energized by itself.

In the embodiment shown in Figures 1 and 2, the injector 2 is arranged coupled to the thermoelectric safety actuator 20.

The electromagnet 36 includes a core 36a, preferably U-shaped, and a single coil 36b wound around the core 36a. Armature 37 is ferromagnetic and closes against transverse free surfaces 36c of core 36a when said electromagnet 36 is energized by thermocouple 4.

The body 21,22 of the thermoelectric safety actuator 20, shown in detail in Figures 3 and 4, comprises a first element 22 comprising the outlet duct 25, and a second element 21 comprising the inlet duct 23, both the First element 22 and second element 21 are substantially cylindrical, each comprising a substantially planar contact surface 21 a, 22a on which both elements 21, 22 are attached. Inlet duct 23 and outlet duct 25 are arranged substantially parallel to each other. The second element 21 comprises a groove 30 which extends along a closed contour on the contact surface 21 a, said groove 30 accommodating a sealing gasket 29 that seals the closure between both contact surfaces 21 a, 22a. The first element 22 and the second element 22 each have ears 22b, 21 b, shown in Figures 1 and 4, with respective holes through which the first element 22 is fixed together with the second element 21 by means of fixing means, said fixing means comprising in the embodiment shown in Figures 1 and 4, respective screws 32.

On the other hand, the first element 22 comprises a first housing 27, substantially cylindrical, where the electromagnet 36 is partially housed, partially projecting with respect to the bearing surface 22a, and a seat 28 which protrudes with respect to the bearing surface 22a , from one end of the outlet duct 25. The first housing 27 and the outlet duct 25 are arranged substantially parallel to each other. The injector 2 is arranged coupled to the outlet duct 25 of said thermoelectric safety actuator 20.

Furthermore, the first housing 27 includes a first part 27a of lower cross section where an end of the core 36a of the electromagnet 36 is supported. On the other hand, the first element 22 comprises a second housing 26, substantially coaxial to the first housing 27, extending from a base 22c, substantially parallel and opposite to the bearing surface 22a, the first housing 27 being communicated with the exterior of the first body

22. In said second housing 26, there is inserted a connection terminal 31 connected to one end 36c of coil 36b and a sealing gasket 33 that seals said second housing 26. Connection terminal 31 protrudes with respect to base 22c being adapted to be connected through a connection terminal 7b of a cable 7 to the thermocouple 4, as can be seen in figure 1.

Furthermore, the second body 21 comprises a housing 24 in which the swing arm 38 is partially housed together with the armature 37 and the shutter

35. The swing arm 38 is arranged fixed to the first body 22 through fixing means. In the embodiment shown, the fixing means comprise screws, shown in Figure 3, although in other embodiments they may comprise other types of known fixing means. The swing arm 38 has a fixed first part 38a and a second movable part 38b with respect to said first part 38a, being arranged fixed in the second part 38b which is substantially flat, the armature 37 and the shutter 35.

The swing arm 38 further comprises elastic means arranged between the first part 38a and the second part 38b, which allow the swing arm 38 to be returned from the activation position, in which the armature 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 shutter 35 closes against the seat 28 the gas passage towards the outlet duct 25. The elastic means comprise a compression spring 39, the spring 39 being arranged coupled to the first part 38a through a projection 38e and the second part 38b through the corresponding projection 38f, shown in figure 3. On the other hand, the second part 38b has tabs 38c, shown in figure 2, each of which cooperates with a corresponding slot 38d that extends along the first part 38a, in a direction substantially orthogonal to the second part 38b, guiding the displacement and the rotation of the second part 38b with respect to the first part 38a.

When the user operates a control to light the burner 6

corresponding, the control sends the corresponding command to an electronic driver

to provide the necessary electrical energy to the electromagnet 36 so that it

energize, attracting armature 37 without user action

5

directly on the electromagnet itself having to move the armature closer 37

against the electromagnet 36 manually. Electronic driver provides power

electrical necessary to attract the armature 37 towards the electromagnet 36, and maintain it

energized for a certain time while acting on the spark plug

ignition 3 so that they generate the necessary chips. If the flame has been lit, the

1 O

thermocouple 4 is heated, generating in turn electrical energy with which it is powered

the electromagnet 36 to continue energized as long as there is a flame. At

moment that there is no flame or that the flame is insufficient for the thermocouple 4

generate enough electrical power to maintain the electromagnet 36

energized, the swing arm 38 of the actuator 20 is positioned in the position of

fifteen

Idle, closing the gas passage to the burner 6.

In a second embodiment of the gas burner, not shown as a whole in

the figures, the gas burner is adapted to a domestic oven with grill to

its operation as a conventional oven or with the grill function,

comprising on the one hand, a housing, a thermocouple, an injection plug, a

twenty

injector supplied with a gas and fixed to the housing, and a mixing duct

communicated with the injector, where the gas arriving through the

injector with air, with characteristics similar to the gas burner 1 described in

First embodiment and shown in Figures 1 and 2. The gas burner of the

second embodiment further comprises the following additional elements a

25

thermocouple, an injector, an injection plug, a mixing line and a

supports similar to those described above, so they will not be described in

detail. These additional elements 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 Figures 5 and 6, which supplies

30

both injectors, will be described below.

The thermoelectric safety actuator 40 comprises a body 41, 42 having

first two elements 42, similar to the first element 22 described in the first

embodiment, and shown in detail in figure 4, and an intermediate element 41

arranged between the first two elements 42.

35

Each first element 42 comprises an outlet duct 45, while the

intermediate element 41 comprises an inlet conduit 43, the

inlet duct 43 substantially orthogonal to outlet ducts 45.

Both the first elements 42 and the intermediate element 41 are

substantially cylindrical, each comprising, at one end, a

5

substantially flat contact surface 41 a, 42a on which they are fixed together

the first elements 42 through the intermediate element 41. The element

intermediate 41 comprises a slot 50 extending along a contour

closed in each of the two contact surfaces 41 a, staying in said

groove 50 a respective sealing gasket 49 that seals the seal between the two

1 O

contact surfaces 41 a, 42a. The intermediate element 41 and the first

elements 42 each have ears 41 b, 42b, shown in the figure

6, with respective holes through which the first ones are fixed together

elements 42 with the intermediate element 41 through screws 52

respective.

fifteen

Each first element 42 comprises a first housing 47, substantially

cylindrical, where a protruding electromagnet 56 is partially housed

partially with respect to the bearing surface 42a, and a seat 48 that

projecting from bearing surface 42a from one end of the conduit

outlet 45. In the first housing 47 and the outlet duct 45 are arranged

twenty

substantially parallel to each other. Each injector is coupled into the outlet duct

45 of the first corresponding element 42 of said safety actuator

thermoelectric 40.

Furthermore, the first housing 47 includes a first section part 47a

lower transverse where one end of a core 46a of the

25

electromagnet 46. Furthermore, the first element 42 comprises a second

housing 46, substantially coaxial to first housing 47, extending

from a base 42c, substantially parallel and opposite to the bearing surface

42a, and that it is communicated with the exterior of the first body 42. In said second

housing 46, there is inserted a connection terminal 51, connected to a

30

end 56c of a coil 56b of electromagnet 56, and a sealing gasket 53

which seals said second housing 46. Connection terminal 51 protrudes with

with respect to the base 42c being adapted to be connected through a

respective connection terminal to the respective thermocouple.

On the other hand, the intermediate element 41 comprises a housing 44 where

35

they partially house swing arms 58 together with reinforcements 57 and

respective shutters 55

Each swing arm 58, similar to the arm 38 of the first embodiment, is arranged fixed to the first body 42 through fixing means comprising, in the embodiment shown in figure 5, screws 54. Each swing arm 58 has a first part 58a fixed and a second part 58b movable with respect to said first part 58a, fixed at each end of the second part 58b which is substantially flat, the armature 57 and the shutter 55.

Each swing arm 58 further comprises elastic means arranged between the first part 58a and the second part 58b, which allow the swing arm 58 to be returned from the activation position, in which the corresponding armature 57 is in contact with the core 56a of the electromagnet 56 corresponding to the rest position in which a substantially flat surface 55b of the shutter 55 closes against a seat 48 of the first body 42 the passage of gas towards the corresponding outlet duct 45. The elastic means comprise a compression spring 59, the spring 59 being arranged coupled to the first part 58a through a projection 58e and to the second part 58b through the corresponding projection 58f, shown in figure 5. On the other hand, the second part 58b has tabs, not shown in the figures, similar to those described in the first embodiment, each of which cooperates with a corresponding slot 58d which extends in the first part 58a in a direction substantially orthogonal to the second part 58b guiding the movement and rotation of the second part 58b with respect to the first part 58a.

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 duct 43 to the respective injector.

In a third embodiment of the invention, the gas burner is similar to that represented in figure 1, comprising the elements described in the first embodiment, the thermoelectric safety actuator 20 shown in figures 1 to 4 being replaced by the safety actuator thermoelectric 60 shown in figure 7 and which will be described below.

The thermoelectric safety actuator 60 is arranged fixed to the housing 5 and comprises a gas inlet duct 63, a gas outlet duct 65, a body 61,62 inside which an electromagnet 76 is accommodated, adapted to be

connected to thermocouple 4, a swing arm 78 at one end of which is

an armature 77 is fixed and at the other end a shutter is fixed

75 by tilting the swing arm 78 between a rest position where the

gas passage from inlet duct 73 to outlet duct 75 is

5

closed by said shutter 75 and an activation position, where the

electromagnet 76 is energized by thermocouple 4 and open gas passage. The

electromagnet 76 is initially energized by an energizing means

auxiliary, being kept energized by said means of energization

auxiliaries until thermocouple 4 is able to keep energized said

1 O

electromagnet 76.

The electromagnet 76 includes a core 76a, preferably U-shaped, and a

single coil 76b wound around core 76a. Armor 77 is

ferromagnetic and closes against transverse core 76c free surfaces

76a when said electromagnet 76 is energized by thermocouple 4.

fifteen

On the other hand, the body 61,62 of the thermoelectric safety actuator 60

it comprises a first element 62 that comprises the outlet duct 65, and a

second element 61 comprising the inlet duct 63, both the first

element 62 as the second element 61 are substantially cylindrical,

each comprising a contact surface 61 a, 62a

twenty

substantially flat on which both elements 61, 62 are fixed. The second

element 61 comprises a groove 70 extending along a contour

closed at the contact surface 61 a, housing in said groove 70 a

sealing 79 that seals the closure between both contact surfaces 61 a, 62a. The

first element 61 and second element 62 each have ears

25

not shown, similar to the safety actuator 20 of the first

embodiment, through which the first element 62 is fixed together with the

second element 61.

The first element 62 comprises a first housing 67, substantially

cylindrical, where the electromagnet 66 is partially housed protruding

30

partially with respect to the bearing surface 62a, and a seat 68 which

projecting from bearing surface 62a from one end of the conduit

outlet 65. In first housing 67 and outlet duct 65 are arranged

substantially parallel to each other. The injector 2 is arranged coupled to the

output 65 of said thermoelectric safety actuator 60.

35

Furthermore, the first housing 67 includes a first section part 67a

lower transverse where an end of the core 66a of the

electromagnet 66. Furthermore, the first element 22 comprises a second

housing 66, substantially coaxial to first housing 67, extending

from a base 62b, arranged at the end opposite to the bearing surface 62a,

5

and that it is communicated with the exterior of the first body 62. In said second

housing 66, there is inserted a connection terminal 71 connected to a

end 66c of coil 76b and a gasket 73 that seals said

second housing 66. Connection terminal 71 protrudes from the

base 72b being adapted to be connected through a connection terminal

1 O

7b from a cable 7 to the thermocouple 4, as can be seen in figure 1.

On the other hand, the second body 61 comprises a housing 64 where

partially houses swing arm 78 along with armature 77 and shutter

75.

The swing arm 78 is arranged fixed to the first body 62 in a similar way as

fifteen

described in the first embodiment. The swing arm 78 has a first part

Fixed 78a and a second movable part 78b with respect to said first part 78a,

by being fixed in the second part 78b which is substantially flat, the

armor 77 and shutter 75.

The swing arm 78 further comprises elastic means arranged between

twenty

the first part 78a and the second part 78b that allow the arm to return

tilting 78 from the activation position in which the armature 77 is in

contact with the core 76a of the electromagnet 76 to the rest position in which a

substantially flat surface 75b of the shutter closes against the seat 68 the

gas passage to the outlet duct 65. The elastic means comprise a

25

compression spring 79, spring 79 being arranged coupled to the first part

78a through a ledge 78e and to the second part 78b through the

corresponding outgoing 78f. Furthermore, the second part 78b has some

tabs not shown in figure 7, similar to tabs shown in figure

Figure 2, described in the first embodiment, each of which cooperates with a

30

corresponding slot 78d extending in the first part 78a, extending

grooves 78d in a direction substantially orthogonal to second part 78b

guiding the displacement and rotation of the second part 78b with respect to the

first part 78a.

The thermostatic safety actuator 60 further comprises a group

35

electromagnetic 81, known in the state of the art so it will not be described

in detail. The electromagnetic group 81 is arranged to be at least partially housed

in a second housing 85 of the second element 61 of the body 61, 62,

said second housing 85 being arranged substantially coaxial with the first

housing 64, the second housing 85 including a seat 84 against which

5

closes a shutter member 82 of the electromagnetic group 80 in a position of

disconnection, when said group is not powered

electromagnetic 81. The electromagnetic group 81 is arranged inserted in the

second element 61, including thermostatic safety actuator 60 a

closure element 83 which is threadedly arranged to an outer surface of the second

1 O

housing 85 and that maintains the magnetic group 81 inside said

second housing 85. In this embodiment, the gas inlet duct 63

communicates with the second housing 85 of the second element 61, arranging

the inlet duct 63 substantially orthogonal to the outlet duct 65.

The thermostatic safety actuator 60 described in this embodiment provides

fifteen

double security, given that on the one hand, when there is no flame or when the flame

not enough for thermocouple 4 to generate enough power to

keeping the electromagnet 76 energized, the shutter 75 closes against the seat 68 the

outlet duct 65, gas not being supplied to the injector 2 that is provided

partially inserted in the outlet duct 65. On the other hand, in the case of

twenty

that a power cut occurs, the electromagnetic group 81 ensures the cut of the

gas supply to injector 2, by closing the shutter member 82 of the group

electromagnetic 81 against the seat 84 the passage of gas towards the outlet duct

65.

Finally, although in the shown embodiments, the spark plug is the one who

25

causes the spark, in other embodiments not shown others can be used

means of ignition.

Claims (14)

CLAIM S one . Burner for a domestic gas appliance comprising at least one housing (5), at least one thermocouple (4), at least one injector (2) supplied with a gas and fixed to the housing (5), and at least one actuator of thermoelectric safety (20; 40; 60) adapted to open or close the gas passage towards said at least one injector (2), characterized in that the thermoelectric safety actuator (20; 40; 60) is arranged fixed to the casing (5 ) and comprises a body (21, 22; 41, 42; 61, 62), at least one gas inlet duct (23; 43; 63), at least one gas outlet duct (25; 45; 65) communicated with the injector (2), at least one electromagnet (36; 46; 66) housed inside the body (21, 22; 41, 42; 61, 62) and arranged connected to the thermocouple (4), at least one swing arm (38; 58; 78) at whose first end an armature is fixed (37; 57; 77) and at whose second end a shutter (35; 55; 75) is fixed, tilting the swing arm (38; 58; 78) between a resting position where the pa Gas flow from the inlet duct (23; 43; 63) to the outlet duct (25; 45; 65) is closed by said shutter (35; 55; 75) and an activation position, where the electromagnet ( 36; 56; 76) is energized and the gas passage is open, the electromagnet (36; 56; 76) being initially energized by auxiliary energizing means and maintained energized by said auxiliary energizing means until the thermocouple (4) is capable of keeping said electromagnet energized (36; 56; 76). CLAIM S 1 . Burner for a domestic gas appliance comprising at least one housing (5), at least one thermocouple (4), at least one injector (2) supplied with a gas and fixed to the housing (5), and at least one actuator of thermoelectric safety (20; 40; 60) adapted to open or close the gas passage to said at least one injector (2), characterized in that the thermoelectric safety actuator (20; 40; 60) is arranged fixed to the casing (5 ) and comprises a body (21, 22; 41, 42; 61, 62), at least one gas inlet duct (23; 43; 63), at least one gas outlet duct (25; 45; 65) communicated with the injector (2), at least one electromagnet (36; 46; 66) housed inside the body (21, 22; 41, 42; 61, 62) and arranged connected to the thermocouple (4), at least one swing arm (38; 58; 78) at whose first end an armature is fixed (37; 57; 77) and at whose second end a shutter (35; 55; 75) is fixed, tilting the swing arm (38; 58; 78) between a resting position where the pa Gas flow from the inlet duct (23; 43; 63) to the outlet duct (25; 45; 65) is closed by said shutter (35; 55; 75) and an activation position, where the electromagnet ( 36; 56; 76) is energized and the gas passage is open, the electromagnet (36; 56; 76) being initially energized by auxiliary energizing means and maintained energized by said auxiliary energizing means until the thermocouple (4) is capable of keeping said electromagnet energized (36; 56; 76). 2 . CLAIM S one . Burner for a domestic gas appliance comprising at least one housing (5), at least one thermocouple (4), at least one injector (2) supplied with a gas and fixed to the housing (5), and at least one actuator of thermoelectric safety (20; 40; 60) adapted to open or close the gas passage to said at least one injector (2), characterized in that the thermoelectric safety actuator (20; 40; 60) is arranged fixed to the casing (5 ) and comprises a body (21, 22; 41, 42; 61, 62), at least one gas inlet duct (23; 43; 63), at least one gas outlet duct (25; 45; 65) communicated with the injector (2), at least one electromagnet (36; 46; 66) housed inside the body (21, 22; 41, 42; 61, 62) and arranged connected to the thermocouple (4), at least one swing arm (38; 58; 78) at whose first end an armature is fixed (37; 57; 77) and at whose second end a shutter (35; 55; 75) is fixed, tilting the swing arm (38; 58; 78) between a resting position where the pa Gas flow from the inlet duct (23; 43; 63) to the outlet duct (25; 45; 65) is closed by said shutter (35; 55; 75) and an activation position, where the electromagnet ( 36; 56; 76) is energized and the gas passage is open, the electromagnet (36; 56; 76) being initially energized by auxiliary energizing means and maintained energized by said auxiliary energizing means until the thermocouple (4) is capable of keeping said electromagnet energized (36; 56; 76). 2

one.

Burner for a domestic gas appliance comprising at least one housing (5), at least one thermocouple (4), at least one injector (2) supplied with a gas and fixed to the housing (5), and at least one actuator of thermoelectric safety (20; 40; 60) adapted to open or close the gas passage towards said at least one injector (2), characterized in that the thermoelectric safety actuator (20; 40; 60) is arranged fixed to the casing (5 ) and comprises a body (21, 22; 41, 42; 61, 62), at least one gas inlet duct (23; 43; 63), at least one gas outlet duct (25; 45; 65) communicated with the injector (2), at least one electromagnet (36; 46; 66) housed inside the body (21, 22; 41, 42; 61, 62) and arranged connected to the thermocouple (4), at least one swing arm (38; 58; 78) at whose first end an armature is fixed (37; 57; 77) and at whose second end a shutter (35; 55; 75) is fixed, tilting the swing arm (38; 58; 78) between a resting position where the pa Gas flow from the inlet duct (23; 43; 63) to the outlet duct (25; 45; 65) is closed by said shutter (35; 55; 75) and an activation position, where the electromagnet ( 36; 56; 76) is energized and the gas passage is open, the electromagnet (36; 56; 76) being initially energized by auxiliary energizing means and maintained energized by said auxiliary energizing means until the thermocouple (4) is capable of keeping said electromagnet energized (36; 56; 76).

2.

Gas burner according to the preceding claim, wherein the injector (2) is arranged coupled to the thermoelectric safety actuator (20; 40: 60).

3.

Gas burner according to the preceding claim, wherein the injector (2) is arranged coupled to the outlet duct (25; 45; 65) of the thermoelectric safety actuator (20; 40; 60).

Four.

Gas burner according to any of the preceding claims, wherein the body (21, 22; 61, 62) comprises a first element (22; 62) comprising the outlet duct (25; 65), a first housing (27; 67) where the electromagnet (36; 66) is partially housed, projecting with respect to a support surface (22a; 62a) of the first element (22; 62), a seat (28; 68) that protrudes with respect to the bearing surface (22a; 62a) from one end of the outlet duct (25; 65), and a second body (21; 61) comprising the inlet duct (23; 63), a

housing (24; 64) in which the armature (37; 77), the swing arm (38; 78) and the shutter (35; 75) are at least partially housed, adapted to close the passage of gas towards the outlet duct ( 25; 65) when closing against the seat (28; 48).

5.

Gas burner according to the preceding claim, wherein the first housing (27; 67) of the first body (22; 62) and the outlet duct (25; 65) are arranged substantially parallel to each other.

6.

Gas burner according to claims 4 or 5, wherein the first body (21; 61) and the second body (22; 62) are arranged sealed.

7.

Gas burner according to any of claims 4 to 6, wherein the swing arm (38; 78) is arranged fixed to the first body (22) and includes a fixed first part (38a; 78a), a second part (38b; 78b ) mobile with respect to the first part (38a; 78a), the armature (37; 77) and the shutter (35; 75) being coupled to the second part (38b; 78b), and elastic means (39; 79) arranged between the first part (38a; 78a) and the second part (38b; 78b), said elastic means (39; 79) enabling the tilting of the second part (38b; 78b) with respect to the first part (38a; 78a ) between the rest position and the activation position.

8.

Gas burner according to any of claims 4 to 7, wherein the first body (22; 62) has a second housing (26; 66) arranged substantially coaxial with the first housing (27; 47; 67) and communicated with the outside of the first body (22; 62), with a connection terminal (31; 71) connected to the electromagnet (36; 76) and to the thermocouple (4) being arranged inserted.

9.

Gas burner according to any of the preceding claims, wherein the inlet duct (23; 63) and the outlet duct (25; 65) are arranged substantially parallel to each other.

1O. Burner according to any of claims 1 to 3 comprising two thermocouples (4), two injectors (2) fed with a gas, and the thermoelectric safety actuator (40), wherein the body (41, 42) of the safety actuator thermoelectric (40) comprises two first elements (42), each of which comprises the outlet duct (45), a first housing (47) where the electromagnet (46) is partially housed, projecting with respect to a surface of support (42a) of the first element (42), a seat (48) projecting with respect to the support surface (42a) from one end of the outlet duct (45), and an intermediate element (41) arranged between both first elements (42), the intermediate element (41) comprising the inlet duct (43) and a housing (44) where the armatures (57), the swingarms (58) and the shutters (55) are at least partially housed cooperating with each electromagnet (56), the shutter (55) being adapted to closing the gas passage to the respective outlet duct (45) by closing against the respective seat (58).

eleven.

Gas burner according to the preceding claim 1 O, wherein the first bodies (42) and the second body (62) are arranged sealed.

12.

Gas burner according to claims 1 O or 11, wherein each swing arm (58) is arranged fixed to the corresponding first body (42) and includes a first fixed part (58a), a second part (58b) movable with respect to the first part (58a), the respective frame (47) and shutter (55) being arranged coupled to the second part (58b), and elastic means (59) arranged between the first part (58a) and the second part (58b) ), said elastic means (59) enabling the tilting of the second part (58b) with respect to the first part (58a) between the rest position and the activation position.

13.

Gas burner according to any of claims 1 to 12, wherein each first body (42) has a second housing (46) arranged substantially coaxial with the first housing (47) and communicated with the exterior of the first body (42), A connection terminal (51) connected with the electromagnet (56) and with the thermocouple (4) is inserted.

14.

Gas burner according to any of claims 4 to 8, wherein the thermostatic safety actuator (60) comprises an electromagnetic group (81) which is arranged to be at least partially housed in a second housing (85) arranged substantially coaxial with the first housing (64), the second housing (65) including a seat (84) against which the electromagnetic group (81) closes in a disconnected position, the inlet conduit (63) being arranged communicating with the second housing (85).

fifteen.

Burner according to the preceding claim, wherein the inlet duct

(63) of gas is arranged substantially orthogonal to the gas outlet duct (85).