FR2782782A1 - BURNER WITH DISPLAY SYSTEM - Google Patents

Abstract

The burner (1) carries a combustion head (2) mounted on the cover (3) of a turbine for providing air ventilation, together with an electronic command and security box (4). The protective cover (5) carries on its front side a display (6) comprising a module (7) receiving infra-red signals from a transmitter (8) on the command box (4).

Description

i

BR LEUR A DISPLAY SYSTEM

  The present invention relates to an automatic air burner

  blown, equipped with a display system.

  An automatic blown air burner is already known, comprising an electronic control and safety box for controlling and monitoring the burner operating cycle, as well as a display system for displaying information relating to the operation of the burner, said information being transmitted by the electronic box to the display system via connecting cables

io electric.

  However, the presence of the electrical connection cables between the electronic box and the display generates electromagnetic interference, because the connection cables act as an antenna, which can cause breakdowns or disturbances in the

  burner operating cycle.

  In addition, when the display is installed on the burner protection cover, when it is desired, for maintenance reasons, to remove the cover, the cables must also be disconnected

  between the display and the electronic unit.

  The object of the invention is to eliminate the aforementioned drawbacks and to propose a burner equipped with a display system, which makes it possible to avoid any electromagnetic disturbance during transmission.

informations.

  To this end, the invention relates to an automatic forced air burner, comprising an electronic control and safety box for controlling and monitoring the operating cycle of the burner, as well as a display system for displaying relative information. during operation of the burner, which information is transmitted by the aforementioned electronic unit, characterized in that the transmission of information from the electronic unit to the display system is ensured by an optical link. Preferably, the transmission of information takes place without a wired link, by

infrared radiation.

  In a first embodiment, the display system is supplied with energy by an autonomous current source, for example by batteries. In another embodiment, the display system is supplied with direct current by a wired link. In the latter case, since the supply current is continuous, it will not risk generating electromagnetic disturbances in the

electronic box.

  Thus, if the batteries are exhausted or if any failure occurs in the display system, this will not affect the

normal burner operation.

  Of course, the electronic box and the display system will be equipped with electronic circuits adapted to process, transmit and

  io receive infrared signals.

  Advantageously, the burner is equipped with a protective cover inside which the electronic box is housed, said cover comprising a precut dimensioned so as to be able to receive

the display system.

  In a first variant, the display system is located on the protective cover of the burner inside which is housed the

electronic box.

  In another variant, the display system is incorporated in a portable box which will be positioned by the operator at a sufficient distance from the electronic box to receive the infrared signals. According to another characteristic of the invention, the display system is equipped with an information output terminal, for its connection to a central processing unit for the remote monitoring of the

burner.

  For example, the information transmitted by the electronic box to the display system is: the number of hours of burner operation, the number of ignitions, the number of burner failures, the type of failure, the voltage of the sector, the burner flame signal, and / or the position in the operating cycle

of the burner.

  To better understand the object of the invention, we will now describe it, by way of purely illustrative examples and not

  limiting, two embodiments shown in the accompanying drawing.

  In this drawing: - Figure 1 is a very schematic and plan view of a first embodiment of the burner of the invention; - Figure 2 is a view similar to Figure 1, but showing another embodiment of the invention; and - Figure 3 is a functional block diagram of the burner of the invention. In Figure 1, there is shown a burner 1 which has a combustion head 2 carried by a housing 3 of an air ventilation turbine, which housing 3 has on its face opposite to the head of

  io combustion 2, an electronic control and safety box 4.

  A protective cover 5 covers the electronic box 4 and is

fixed on the housing 3.

  The protective cover 5 has, through its front wall, a precut through which a display system 6 is implanted. The i5 display system 6 comprises a module 7 which projects inside the cover 5 and which is suitable to receive infrared signals from an infrared radiation transmitter 8 of the electronic box 4, the transmission of infrared signals being modeled by the arrow I. The module 7 of the display system 6 is attached to a front plate 9 which carries a display screen which bears against the outer wall of the cover 5, which allows the operator to view the

  information directly on the burner hood.

  Although this is not shown, the display system includes in the module 7 batteries for its power supply, these batteries giving the display system an operating autonomy of approximately 50 hours. We can expect the display system to automatically go to sleep after a period of

  uninterrupted 5 minutes of non-use.

  In the variant of FIG. 2, the cover 5 is shown in broken lines and has been removed, to allow the transmission of the infrared signals I between the electronic box 4 and the display system 16 which comprises the module 7 and the wafer 9 incorporated in a portable box 10 which is independent of the rest of the burner 1. As the transmission of information by infrared radiation can be carried out at a distance of several meters, the positioning of the display system 16 relative to the electronic box 4 can be

  relatively imprecise, which facilitates its use.

  In the case of the portable display system 16, the box 10 being larger, it can integrate additional batteries for

  s give the display system greater autonomy.

  Referring to Figure 3, we will now describe the different information that can transmit the electronic box 4

to the display system 6.

  The electronic box 4 receives by an input E1 a signal for detecting the flame F in the combustion head 2, this signal being able to be supplied by a photoresist cell, an ultraviolet radiation cell, or by an ionization current circuit. . The electronic unit 4 receives by a second input E2 a signal supplied by a pressure switch 20, this pressure switch being connected to the air duct coming from the air ventilation turbine of the burner and being adjusted to a predetermined pressure value, of so as to send an electrical signal to the electronic box, to authorize the continuation of the burner operating cycle, as soon as the pressure switch detects a pressure higher than said predetermined pressure value. When the electronic unit 4 receives this electrical signal by the input E2, it sends a control signal for the fuel supply in the

  combustion chamber 2, namely gas or fuel.

  The electronic control unit 4 sends the control signal for the fuel supply via the output S1, for

order a solenoid valve 21.

  The control box 4 also controls, via output S2, the electrical supply of a ventilation motor 22 of the turbine to

burner air.

  The electronic box 4 also controls by the output S3 the electrical supply of a transformer 23 to supply a voltage of the order of 17kV to the ignition system of the burner which operates by the creation of an electric arc between two electrodes at

  inside the combustion chamber.

  The electronic box 4 can also control by the output S4 a servo-motor 24 which makes it possible to adjust the position of an air flap (not shown) on the air intake pipe of the burner turbine, to adjust the air flow sent to the combustion chamber. The servo motor 24 is slaved to a thermostat which is placed on the hot water supply pipe from the boiler associated with the burner, to detect the outlet temperature of the boiler. If the outlet temperature of the hot water from the boiler is insufficient, the servomotor 24 causes the air flap to open further to supply the combustion chamber 2 with more fuel. Under these conditions, the fuel flow increases in proportion to the air flow sent into the

  io combustion chamber, because the fuel valve 21 is self-

  adaptive depending on the air pressure and gas pressure in

the combustion chamber 2.

  Although not shown, the display system 6 or 16 can be connected to the telecommunications network, to perform

of remote monitoring.

  Although the invention has been described in connection with particular embodiments, it is obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these come under

the invention.

Claims (10)

  1. Automatic burner (1) with supply air, comprising an electronic control and safety box (4) for controlling and monitoring the operating cycle of the burner, as well as a display system (6, 16) for displaying information relating to the operation of the burner, which information is transmitted by the aforementioned electronic unit, characterized in that the transmission of information from the electronic unit (4) to the display system   (6, 16) is provided by an optical link (I).   2. Burner according to claim 1, characterized in that the transmission of information takes place without a wired connection, by infrared radiation.   3. Burner according to claim 1 or 2, characterized in that the display system (6, 16) is supplied with energy by a   autonomous current source, for example by batteries.   4. Burner according to claim 1 or 2, characterized in that the display system (6, 16) is supplied with direct current by a wire link.   5. Burner according to one of claims 1 to 4, characterized by the   fact that it is equipped with a protective cover (5) inside which is housed the electronic unit (4), said cover comprising a precut   dimensioned so as to be able to receive the display system (6).   6. Burner according to claim 5, characterized in that the display system (6) is located on the protective cover (5) of the   burner inside which the electronic box (4) is housed.   7. Burner according to one of claims 1 to 5, characterized by the   the display system (16) is incorporated in a portable box (10) which will be positioned by the operator at a sufficient distance from the electronic box (4) to receive the signals infrared.   8. Burner according to one of claims 1 to 7, characterized by the   the display system (6, 16) is equipped with an information output terminal, for connection to a central processing unit   for remote monitoring of the burner (1).   9. Burner according to one of claims 1 to 8, characterized by the   fact that the information transmitted by the electronic box (4) to the display system (6, 16) is the number of hours of   burner operation, the number of ignitions, the number of burner failures, the type of failure, the mains voltage, the burner flame signal, and / or the position in the burner's operating cycle5.   10. Burner according to one of claims 1 to 9, characterized in that one of the information transmitted by the electronic box (4)   to the display system (6, 16) is the value of the ionization current of the flame detection signal.