EP0111609B1 - Ignition and feeding device for gas radiators - Google Patents

Abstract

1. Claims for the contracting states : AT, BE, CH, DE, GB, IT, LI, NL, SE. System for lighting and supplying gas infrared radiators, of a type comprising : . an apparatus, called upstream distribution apparatus (6), designed to be connected to a gas outlet so as to deliver gas in a pressure range, Pi, corresponding to the heating levels, . a safety valve (20) located in the vicinity of the radiator (1) and whose outlet is connected to the radiator by a gas injection pipe (22), the said valve being provided with a device holding the valve flap in the open position, the said device being slaved to a temperature sensor (21), . a pilot light (27), mounted on the radiator so as to enable it to be relit and linked to the temperature sensor (21) with a view to maintaining the safety valve (20) in its open position when the pilot light is lit, . gas piping (4) stretching from the upstream distribution apparatus (6) to the inlet of the safety valve (20), The said system being characterized in that it comprises : . upstream pressure-reducing apparatus (14), bypassing the upstream distribution apparatus (6), and designed to deliver the gas to the inlet of the piping (4) at a pressure, pv, less than the pressures, Pi, of the heating levels, . a selector valve (24), mounted on the injection pipe (22) between the safety valve (20) and the radiator (1) and designed to be opened at pressures equal to or greater than the pressures, Pi, and closed at pressure pv, . a pilot light pipe (25), mounted in parallel to the injection pipe (22) at the outlet of the safety valve (20) in order to connect the latter to the pilot light (27), this pilot light pipe (25) comprising downstream pressure reducing apparatus (26) designed to regulate the pressure at the pilot light to a very approximately constant value. 1. Claims for the contracting state : FR. System for lighting and supplying gas infrared radiators, of a type comprising : . an apparatus, called upstream distribution apparatus (6), designed to be connected to a gas outlet so as to deliver gas in a pressure range, Pi, corresponding to the heating levels, . a safety valve (20) located in the vicinity of the radiator (1) and whose outlet is connected to the radiator by a gas injection pipe (22), the said valve being provided with a device holding the valve flap in the open position, the said device being slaved to a temperature sensor (21), . a pilot light (27), mounted on the radiator so as to enable it to be relit and linked to the temperature sensor (21) with a view to maintaining the safety valve (20) in its open position when the pilot light is lit, . gas piping (4) stretching from the upstream distribution apparatus (6) to the inlet of the safety valve (20), . upstream pressure-reducing apparatus (14), bypassing the upstream distribution apparatus (6), and designed to deliver the gas to the inlet of the piping (4) at a pressure, pv, less than the pressures, Pi, of the heating levels, . a selector valve (24), mounted on the injection pipe (22) between the safety valve (20) and the radiator (1) and designed to be opened at pressures equal to or greater than the pressures, Pi, and closed at pressure pv, . a pilot light pipe (25), mounted in parallel to the injection pipe (22) at the outlet of the safety valve (20) in order to connect the latter to the pilot light (27), this pilot light pipe (25) comprising downstream pressure-reducing apparatus (26) designed to regulate the pressure at the pilot light to a very approximately constant value, the said system wherein the pilot light associated with each infrared radiator comprises a mini infrared emitter integrated in the said radiator.

Description

The invention relates to a system for igniting and supplying gas radiators. It can in particular be applied to infrared heaters and be used in particular in the agricultural sector for heating livestock buildings.

Referring to previous application number 81 13200, filed in France on July 1, 1981 and published on 07.01.1983 under number FR-A-2 509 019, the applicant proceeded on its own initiative to a limitation and presented separate claims for France.

Known ignition and supply systems for gas radiators generally include a central distribution and control panel, which is connected by gas pipes and by electric cables to the various members which equip each injector radiator of the burner, pilot light. , safety valve, electromechanical equipment associated with the latter and, where applicable, spark gap or electrical ignition resistance.

First, such systems have the defect of necessarily having to have two independent gas pipes between the central panel and each radiator (which can be separated by several tens to several hundred meters): a pipe for the main supply to the burner of the radiator, the other for the auxiliary supply of its pilot light, the very function of which requires that it remain on during the radiator shutdown period when the central switchboard has switched off the supply of the latter (see par example FR-A-2 366 518).

In addition, known systems also have the defect of requiring on each radiator the presence of an electromechanical device which acts on the safety valve to keep it open during ignitions in order to authorize the arrival of gas to the burner at the time of ignition. The presence of such an apparatus which must be electrically supplied further increases the complexity of the installation.

The present invention proposes to remedy the shortcomings of known systems, by providing a system whose connections between central station and radiators are significantly simplified.

A first objective of the invention consists in particular in ensuring the ignition and supply of each radiator under the same safety conditions as the known systems, and this, with a single gas pipe between the central station and the radiator considered .

Another objective of the invention is to reduce the electrical connections between central station and radiator, to a simple two-conductor cable in the case of a system provided with a spark gap or an ignition resistor, or even completely remove these connections in the case of a system devoid of such ignition devices (the first ignition being carried out manually and the re-ignitions being carried out by means of the pilot).

Another objective of the invention is to authorize a modulation of the heating regime of each radiator as a function of temperature setpoints.

Another objective is to ensure, in the event of a power failure, an instantaneous re-ignition of the radiator if the latter is in automatic shutdown period or a maintenance of the latter in the on state if it is already in this state at the time of the failure.

Finally, another objective is to provide an improved pilot light, particularly well suited to infrared type radiators.

• . des moyens dits moyens de distribution amont, destinés à être branchés sur une arrivée de gaz pour délivrer le gaz dans une plage de pression Pi correspondant aux régimes de chauffe,
• . une valve de sécurité, située au voisinage du radiateur et dont la sortie est reliée au radiateur par un conduit d'injection du gaz, ladite valve étant dotée d'un organe de maintien de son clapet en position ouverte, organe asservi à un détecteur de température,
• . une veilleuse montée sur le radiateur pour permettre son réallumage et à laquelle est associé le détecteur de température en vue d'assurer le maintien de la valve de sécurité en position ouverte lorsque la veilleuse est allumée,
• . des moyens d'acheminement du gaz s'étendant entre les moyens de distribution amont et l'entrée de la valve de sécurité.

The ignition and supply system targeted by the invention is of the type comprising:

• . means known as upstream distribution means, intended to be connected to a gas supply to deliver the gas in a pressure range Pi corresponding to the heating regimes,
• . a safety valve, located in the vicinity of the radiator and the outlet of which is connected to the radiator by a gas injection duct, said valve being provided with a member for holding its valve in the open position, member slaved to a temperature,
• . a pilot light mounted on the radiator to allow its re-ignition and with which the temperature detector is associated in order to maintain the safety valve in the open position when the pilot light is on,
• . gas transport means extending between the upstream distribution means and the inlet of the safety valve.

• . des moyens détendeurs amont, branchés en dérivation des moyens de distribution amont et adaptés pour délivrer le gaz à l'entrée des moyens d'acheminement à une pression pv inférieure aux pressions Pi des régimes de chauffe,
• . une valve sélective, disposée sur le conduit d'injection entre la valve de sécurité et le radiateur et adaptée pour être ouverte à des pressions égales ou supérieures aux pressions Pi et fermée à la pression pv,
• . un conduit, dit de veilleuse, disposé en parallèle avec le conduit d'injection à la sorite de la valve de sécurté afin de relier cette dernière à la veilleuse, ce conduit de veilleuse comprenant des moyens détendeurs aval aptes à ramener la pression au niveau de la veilleuse à une valeur très approximativement constante.

In accordance with the present invention, the system is characterized in that it comprises, in combination with the means defined above:

• . upstream pressure reducing means, connected in bypass of the upstream distribution means and adapted to deliver the gas to the inlet of the conveying means at a pressure pv lower than the pressures Pi of the heating regimes,
• . a selective valve, placed on the injection pipe between the safety valve and the radiator and adapted to be open at pressures equal to or greater than the pressures Pi and closed at the pressure pv,
• . a conduit, called a pilot light, arranged in parallel with the injection conduit at the outlet of the safety valve in order to connect the latter to the pilot, this pilot conduit comprising downstream pressure reducing means capable of reducing the pressure to the level of the pilot at a very approximately constant value.

Thus, as will be better understood below, the system according to the invention makes it possible to provide, as means of transporting the gas, a single pipe connecting the upstream distribution means (located in particular on a central control panel) and the safety valve inlet (integral with the radiator).

During the automatic shutdown period of the radiator (upstream distribution means closed), the pilot light is supplied through the aforementioned bypass which includes the upstream regulator means: the gas supplied by the aforementioned single pipe has insufficient pv pressure to open the selective valve located upstream of the radiator burner and is directed to the pilot through the pilot duct.

When the burner is in operation, the downstream pressure reducing means reduce the pressure at the pilot to an appropriate value.

According to another characteristic of the invention, the upstream distribution means comprise at least two branches in parallel, each provided with a controlled valve and with a regulator, the regulators of different branches having different outlet pressures in the range Pi mentioned above, however that the controlled valves are slaved to thermostatic members, in order to ensure heating regimes depending on a detected temperature.

Such a system thus modulates the heating regime which can be adapted to the application envisaged. It should be noted that by the expression "controlled valve" is meant both solenoid valves controlled by thermostats and any other equivalent member such as, in particular, thermostatic valves with expandable fluid, controlled by fluid capsules connected to said taps by capillary conduits.

In the case of solenoid valves, one of said solenoid valves is of the solenoid valve type which is open without voltage, so as to authorize the distribution of gas in heating mode, in the event of a power failure.

Furthermore, the invention applies both to systems without an electrical automatic ignition member and to systems provided with such members (spark gap, electrical resistance, etc.).

• . une branche, dite d'allumage est disposée en dérivation des moyens de distribution amont, cette branche étant adaptée pour délivrer le gaz à l'entrée des moyens d'acheminement à une pression Pa supérieure aux pressions Pi aux instants où l'organe électrique d'allumage est actionné,
• . la valve de sécurité est une valve du type comprenant des moyens d'ouverture de son clapet, ajustés pour provoquer ladite ouverture au-dessus d'un seuil de pression S tel que Pi < S < Pa.

In the latter case, the system according to the invention has the following characteristics:

• . a branch, called the ignition branch, is arranged as a bypass of the upstream distribution means, this branch being adapted to deliver the gas to the inlet of the conveying means at a pressure Pa greater than the pressures Pi at the times when the electrical member d ignition is activated,
• . the safety valve is a valve of the type comprising means for opening its valve, adjusted to cause said opening above a pressure threshold S such that Pi <S <Pa.

Thus, during the period of time when the electric ignition member is actuated (in a conventional manner by a timed electric igniter, located on the central control panel), the ignition branch delivers, at the inlet of the valve safety, gas at an increased pressure Pa> S, which causes the opening of this valve. The radiator burner is then supplied with gas and can ignite under the action of the electrical ignition element (spark gap, resistance ...). At the end of this ignition sequence, the valve flap is kept open by its holding member (thanks to the temperature detector - thermocouple or other - which is located in the pilot flame); the heating regimes which correspond to pressures Pi lower than the opening threshold S of the valve, can thus be established, while ensuring safety in the event of the pilot light going out.

Furthermore, in the case of infrared radiators, the pilot light associated with each radiator can be constituted, in accordance with an advantageous embodiment, by an infrared mini-transmitter incorporated in said radiator.

• - la figure 1 représente schématiquement un système d'alimentation et de commande conforme au premier mode de réalisation précité,
• - la figure 2 représente schématiquement, en vue partielle, une variante de ce système.

The invention described above in its general form will be better understood on reading the description which follows and on examining the appended drawing which presents, by way of nonlimiting examples, an embodiment and a variant thereof; on this drawing which is an integral part of the description:

• FIG. 1 diagrammatically represents a supply and control system in accordance with the aforementioned first embodiment,
• - Figure 2 shows schematically, in partial view, a variant of this system.

• . l'allumage d'un radiateur 1 après une période de non-fonctionnement,
• . son réallumage automatique après une période d'arrêt automatique,
• . l'alimentation modulée dudit radiateur pour fournir des régimes de chauffe adaptés aux besoins,
• . et, en cas de panne de courant électrique, un réallumage instantané du radiateur si ce dernier se trouvait en période d'arrêt automatique ou un maintien dudit radiateur à l'état allumé s'il se trouvait déjà dans cet état au moment de la panne.

The system shown by way of example in FIG. 1 is intended to ensure, under the required automatic safety conditions:

• . the ignition of a radiator 1 after a period of non-operation,
• . automatic re-ignition after an automatic shutdown period,
• . the modulated supply of said radiator to provide heating regimes adapted to the needs,
• . and, in the event of an electrical power failure, an instantaneous re-ignition of the radiator if it was in the automatic shutdown period or a maintenance of said radiator in the on state if it was already in this state at the time of the failure .

The gas radiator can be of any known type.

The system according to the invention essentially comprises two sets, a set 2 arranged at the location of the radiator and composed of members secured to it and a set composed of members grouped together on a central control panel 3. These two assemblies which in certain livestock buildings can be separated by several hundred meters, are connected by a single pipe 4 for conveying gas and by an electric cable 5 with two conductors.

The central control panel 3 comprises upstream distribution means 6 which are connected to a gas inlet valve 7 with a view to delivering the gas in heating mode, at several pressures Pi (P1, P2, ...) to the inlet of the pipe 4 (in the example, the inlet pressure at the tap 7 is assumed to be equal to a value Pa greater than the maximum value of the pressures Pi, a booster / regulator 34 may be provided for this purpose).

These upstream distribution means 6 are composed of several branches in parallel (two, three or more) which each include a solenoid valve such as 8 or 9 and a regulator such as 10 or 11, reducing the inlet pressure to the pressure Pi of the branch considered. The regulators 10, 11 are adapted so that the pressures Pi have different values in order to allow different heating regimes.

The solenoid valves 8, 9 are slaved to thermostats such as 12 or 13, which control the opening or closing depending on a detected temperature.

One of the solenoid valves, for example solenoid valve 8, is a solenoid valve open when de-energized, while the others are solenoid valves closed when de-energized.

The upstream distribution means 6 described above are shunted by said upstream pressure reducing means, which are constituted by a pressure reducer 14 disposed on a bypass 15. This pressure reducer 14 is adapted to deliver a pressure pv lower than the minimum value of the pressures Pi heating regimes.

Finally, a so-called ignition branch 16, is arranged as a by-pass of the means described above in order to be able to deliver the gas to the inlet of the pipe 4, at the pressure Pa greater than the maximum value of the pressures Pi of the heating regimes.

In the example, the pressure Pa is assumed to be the inlet pressure of the gas and the ignition branch 16 comprises a solenoid valve 17, of the closed voltage-free type, which is electrically connected to a timed electric igniter 18 of a type known per se. .

This timed igniter 18 is intended to supply electrically through the conductors 5 a spark gap 19 (or any other similar member) disposed at the level of the radiator 1. This electrical supply which takes place during a given period of time is triggered either manually by action on a manual button 18 'either automatically by a thermostatic action or under the influence of any other external order.

The igniter 18 simultaneously controls the opening of the solenoid valve 17, in synchronism with the supply of the spark gap 19, this solenoid valve 17 being closed at any other time.

• . un organe électrique de maintien de son clapet en position ouverte, associé à un thermo- couple 21,
• . une capsule pneumatique 20a (ou un verin pneumatique) commandant l'ouverture de son clapet au dessus d'un seuil de pression S.

Furthermore, the assembly 2 associated with each gas radiator 1 comprises a safety valve 20 of a type known per se, comprising:

• . an electrical member for holding its valve in the open position, associated with a thermocouple 21,
• . a pneumatic capsule 20a (or a pneumatic cylinder) controlling the opening of its valve above a pressure threshold S.

The inlet of the safety valve 20 is connected to the pipe 4 and its outlet is connected to a pipe 22 for injecting gas into the burner of the radiator 1. The capsule or pneumatic cylinder 20a is connected, by a branch 23, at the inlet of the valve 20, so that it is the gas which arrives towards the latter which acts on said capsule.

Said capsule is adjusted so that its triggering threshold S is greater than the maximum value of the pressures Pi and less than the pressure Pa: Pi <S <Pa.

In addition, the valve 20 is provided with a manual button 20b which makes it possible to manually generate the opening of its valve.

In addition, the injection pipe 22 includes a selective valve 24 of the type which can be operated by the gas passing through it; this valve is calibrated so as to open from a pressure threshold s greater than the pressure pv (supplied by bypass 15) and less than the minimum value of the pressures Pi of the heating regimes: pv <s <Pi .

Furthermore, at the outlet of the safety valve 20, is connected in parallel with the conduit 22, a conduit 25 called the pilot light conduit. This duct 25 includes a downstream regulator 26 which brings the gas pressure to a suitable constant value 27 (at most equal to the pressure pv, to within the pressure drop).

In the example shown in FIG. 1, the pilot is a conventional type pilot flame, with which the thermocouple 21 of the safety valve 20 is associated.

The various organs of the system according to the invention and their arrangement having been described above, the operation of this system will be explained below.

• . la mise en fonctionnement de l'éclateur 19 pendant un laps de temps donné,
• . l'ouverture de l'électrovanne 17 pendant le même laps de temps.

The system being assumed to be in complete shutdown state, an ignition order (manual, thermostatic or other) is transmitted to the igniter 18 and conditions:

• . the operation of the spark gap 19 for a given period of time,
• . the opening of the solenoid valve 17 during the same period of time.

The gas is then distributed at the pressure Pa through the branch 16; it generates the opening of the safety valve 20 (Pa> S) and is routed on the one hand, through the injection pipe 24 to the radiator burner (Pa> s), on the other hand, through the pipe from pilot 25 to pilot 27 at the appropriate pressure.

Under the action of the spark gap, the burner and the pilot light.

At the end of the abovementioned period of time, the safety valve 20 is kept open by the thermostat 21 as long as the pilot remains on; the latter is supplied through the branch 15.

The appropriate heating regime is obtained by opening one of the solenoid valves 8, 9 .... which distributes the gas at the appropriate pressure Pi. The burner is supplied with gas through the safety valve 20 (kept open) and the selective valve 24 (Pi> s).

An automatic burner shutdown may occur if the temperature setpoints cause all of the heaters to close. solenoid valves 8, 9 ... The pilot remains on, the gas which feeds it being directed towards it due to the closing of the selective valve 24 (pv <s).

A re-ignition will take place through said pilot if a heating regime Pi is again conditioned by opening one of the valves 8, 9 ...

In the event of an electrical power failure, the solenoid valve 8, open when de-energized, opens and the burner is supplied with power during the fault, whatever its speed at the start of the fault.

If the pilot light 27 accidentally goes out, the safety valve 20 closes immediately by the action of the thermocouple 21 and the gas distribution is stopped; a new action of the igniter 18 will be required to generate a new ignition as previously described.

We can see the advantage of the system of the invention, which provides all the required security and allows with a single gas pipe 4 between central station 3 and radiator 1, to light, relight and supply the radiator according to modulated heating regimes. .

Figure 2 shows, in partial view, a system similar to the previous one, but with an improved pilot; to facilitate understanding, we have used in this figure references identical to those of the previous figure to designate the same elements.

The radiator 1 is an infrared radiator conventionally composed of a combustion chamber 1a, a radiant plate 1b, an air inlet filter 1c connected by a duct 1d to the chamber 1a and a gas injector 1e.

• - une petite chambre de combustion 28, contenue dans la chambre la du radiateur et isolée de celle-ci par une cloison 29, le conduit de veilleuse 25 débouchant dans ladite petite chambre 28,
• - une petite plaque radiante 30, constituée par une partie de la plaque radiante 1b du radiateur,
• - une zone de filtration 31, faisant partie du filtre 1 c et isolée par une cloison 32, cette zone étant reliée par un conduit 33 à la petite chambre de combustion 28.

The pilot light is then constituted by an infrared mini-transmitter incorporated into said radiator. It essentially includes:

• a small combustion chamber 28, contained in the chamber 1a of the radiator and isolated from the latter by a partition 29, the pilot pipe 25 opening into said small chamber 28,
• a small radiant plate 30, constituted by a part of the radiant plate 1b of the radiator,
• a filtration zone 31, forming part of the filter 1 c and insulated by a partition 32, this zone being connected by a duct 33 to the small combustion chamber 28.

Such a pilot light works like an infrared radiator and makes it possible to further simplify the system while improving its operating conditions (reduction of the risks of accidental extinction of the pilot light). It can if necessary be adapted to constitute a light source of low intensity playing the role of light pilot.

Claims (14)

1. System for lighting and supplying gas infrared radiators, of a type comprising:

. an apparatus, called upstream distribution apparatus (6), designed to be connected to a gas outlet so as to deliver gas in a pressure range, Pi, corresponding to the heating levels,

. a safety valve (20) located in the vicinity of the radiator (1) and whose outlet is connected to the radiator by a gas injection pipe (22), the said valve being provided with a device holding the valve flap in the open position, the said device being slaved to a temperature sensor (21),

. a pilot light (27), mounted on the radiator so as to enable it to be relit and linked to the temperature sensor (21) with a view to maintaining the safety valve (20) in its open position when the pilot light is lit,

. gas piping (4) stretching from the upstream distribution apparatus (6) to the inlet of the safety valve (20),

The said system being characterized in that it comprises:

. upstream pressure-reducing apparatus (14), bypassing the upstream distribution apparatus (6), and designed to deliver the gas to the inlet of the piping (4) at a pressure, pv, less than the pressures, Pi, of the heating levels,

. a selector valve (24), mounted on the injection pipe (22) between the safety valve (20) and the radiator (1) and designed to be opened at pressures equal to or greater than the pressures, Pi, and closed at pressure pv,

. a pilot light pipe (25), mounted in parallel to the injection pipe (22) at the outlet of the safety valve (20) in order to connect the latter to the pilot light (27), this pilot light pipe (25) comprising downstream pressure reducing apparatus (26) designed to regulate the pressure at the pilot light to a very approximately constant value.

2. System for lighting and supplying according to claim 1, wherein the gas piping consists of a single pipe (4) connecting the upstream distribution apparatus (6) and the inlet of the safety valve (20).

3. System for lighting and supplying according to claim 1 or 2, wherein the upstream distribution apparatus (6) comprises at least two parallel branches, each provided with a controlled valve (3, 9) and a pressure reducing device (10, 11), the pressure reducing devices of the different branches having different outlet pressures within the range Pi mentioned above, however the controlled valves are slaved to thermostats (12, 13) with a view to assuring heating levels as a function of a temperature detected.

4. System for lighting and supplying according to claim 3, wherein the controlled valves (8, 9) of the distribution apparatus are electrovalves, wherein one of the said electrovalves (8) is an electrovalve open when de-energized, so as to authorize the distribution of the gas in the event of an electrical power failure.

5. System for lighting and supplying according to one of the claims 1, 2, 3 or 4 wherein the selector valve (24) mounted on the injection pipe (22) is of a type operated by the gas flowing through it beyond a pressure thresholds such that pv<s<Pi.

6. System for lighting and supplying according to one of the claims 1, 2, 3,4 or 5, wherein the safety valve (20) is a valve of a type comprising a thermocouple (21) as a temperature sensor.

7. System for lighting and supplying according to one of the foregoing claims, comprising a time-delayed electrical igniter (18) designed to control the action of an electrical ignition device (19) mounted on the radiator (1), wherein:

. a lighting branch (16) mounted by passing the upstream distribution apparatus (6), this branch being designed to deliver gas to the inlet of the piping (4) at a pressure, Pa, greater than pressures, Pi, as the electrical ignition device (19) is activated,

. the safety valve (20) is of a type comprising a device to open its flap, designed to cause the said opening above a pressure threshold, S, such that Pi < S < Pa.

8. System for lighting and supplying according to claim 7, wherein the lighting branch (16) comprises an electrovalve (17) closed when de-energized, electrically connected to the time-delayed electrical igniter (18) with a view to controlling its opening in synchronization with the activation of the electrical ignition device (19) mounted on the radiator.

9. System for lighting and supplying according to one of the claims 7 or 8, wherein the safety valve (20) is of a type whose opening is controlled by a pneumatic actuator or capsule (20a), characterized in that it comprises a by-pass (23) connecting the said pneumatic actuator or capsule to the inlet of the safety valve.

10. System for lighting and supplying according to claim 9, wherein the safety valve (20) is of a type comprising a manual push-button (20b) enabling the valve flap to be opened manually.

11. System according to one of the foregoing claims, for the lighting and supplying of infrared radiators, each comprising a combustion chamber (1a), a radiation plate (1b) and a filter (1 c) of the air inlet to the combustion chamber, the said system being characterized in that the pilot light associated with each infrared radiator consists of a mini infrared emitter integrated in the said radiator.

12. System for lighting and supplying according to claim 11, wherein the mini infrared emitter acting as a pilot light comprises:

. a small combustion chamber (28) contained within the chamber (1 a) of the infrared radiator and separated from the latter by a partition (29), the pilot light pipe (25) emerging in the said small chamber (28),

. a small radiation plate (30) consisting of a part of the radiation plate (1 b) of the infrared radiator.

13. System for lighting and supplying according to claim 12, wherein the mini infrared emitter acting as a pilot light comprises an air supply for its small combustion chamber (28), the said supply consisting of a filtering zone (31) of the air inlet filter (1c), separated by a partition (32).

14. System for lighting and supplying according to one of the foregoing claims wherein:

. the upstream distribution apparatus (6), the upstream pressure-reducing apparatus (14) and, if required, the time-delayed electrical igniter (18) and the lighting branch (16) are combined on a central control panel (3),

. the safety valve (20), the selector valve (24), the pilot light (27), the downstream pressure-reducing apparatus (26) associated with the latter and, if required, the electrical ignition device (19) constitute an assembly (2) secured to the radiator (1 ),

. the said assembly (2) is connected to the central control panel (3) by a single gas pipe (4) and, if required, an electrical cable (5).

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