DE2908944A1 - CONTROL DEVICE FOR CONTROLLING GAS BURNERS - Google Patents

Description

DESCRIPTION:

The invention relates to a control device for regulating gas burners, such as those used for household appliances such as gas stoves finds. In the case of household appliances, one is controllable by hand Cooking facilities in conjunction with an automatic Cooking sequence is advantageous, which is operated by a timer.

In a known embodiment, a with einin Electromagnet operated valve built into the gas supply line of the burner and normally kept closed, whereas it then assumes an open position when either manual operation has been triggered for this or, in some cases, so in the case of the automatic operating mode, the timer switches the Solenoid turns on to open the valve for a predetermined time. With such a hand opening however, the valve cannot normally assume its open position in the event of a power failure and thereby allow operation of the burner, it being assumed that others are connected in series The valves of the gas supply line are also in the open position. You can do this Correct the disadvantage that manually operable bridging devices are used to either to bypass or keep the solenoid operated valve open. Such a facility however, has the disadvantage that later measures by which the automatic operating sequence is established if the user does not remember, undo the override process to do after power is restored.

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In another arrangement, instead of a normally closed one, a normally open valve is used 5 '. there is the disadvantage, however, that the power-omaus- • hr-er.i the shutdown phase of an automatic .aufs las is actuated by means of the electromagnet; assumes open position and does not ιξ 2 ^ ε emerges, which can even be dangerous ₀ .: =. ::. 5 power for the actuation of an ignition system

■ """■ _living invention is the task of creating: - = £ 3ept control device ₅ in which the disadvantages named r-srer.end are avoided«

.; r_ς 5 ς: -: .. = fi this is the case with a control device

in which a valve by means of an Elek- ^ neter. can be operated and normally opened. Is achieved by ₉ that a single hand.:. = Rs5, thermostatically controlled valve and an actuated before for cas through the electromagnet - ^ - ssehen slnd _s wherein the bypass with a - is stranded ^v = ηΐίΙ _9, the hand- close . f ^ s thersiostatically controlled "valve through

Engsschlosssn is that the open position ~ ed wi Verttlls as3 He manuf rush _s when the ther mo-· = CH;. Jasteuerts valve in its closed position

~: i = = -7a: TtII can be arranged on the thermostatically controlled part *, or form part of it., .i3 -? - the bypass valve can also be operated with the electric : is ^ h operated valve be combined. Ib / e embodiment of the invention, the valve actuated by means of ekxrc;:; agnsten and the bypass

the "went to 3-as a pilot burner to control the f _s ~ 6 :: if. .-- Inen container ₉ is connected which has a

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Part of a sensor device for flame failure forms, which continues to be a valve in 1 ^ r main supply line for the gas burner to be regulated. So no gas can get to the burner, cry Among other things, the sensor device for flame failure is not open; this in turn means that the solenoid operated valve or the connected The bypass valve must be open to ensure the gas supply to the pilot burner.

The invention is illustrated below with reference to further features and effects with reference to the drawings; show in it:

Fig. 1 is a schematic representation of a system that is provided with the control device according to the invention for a gas burner, while

2 shows the embodiment in an enlarged reproduction represents a bypass valve, which in a control device according to the invention for a Gas burner is used.

As can be seen first from FIG. 1, the system is with a gas burner 10 which can be provided, for example, in a household appliance such as a gas stove. This gas burner 10 should be operable either manually or automatically, with the burner at a specific Time is ignited and the control by means of a timer 11 is subject for a subsequent time. The gas flowing out of the gas burner is ignited by means of an electrode 12, which is inserted into the The ignition system indicated by general reference numeral 13 is incorporated without forming part of the present invention to build. Furthermore, a switch 14 is provided, which on a contact 15 for manual operation or optionally adjustable to a contact 16 for automatic operation is.

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-.ν 10 the gas flows through a Haurtverscrgun-sbeitun-i Π , in which there is a thermostatic .τ · = it controls valve 18, which corresponds to a switch II, so that the valve 18 of the user -es cooker is set leaves. For this purpose, valve IS has a manually rotatable tap; the initial movement of this tap, in which it is swiveled from an "AirV" position in "on" position v. ^T ird, iirn: der.-: Closing the switch 19, with the track being turned a little bit , which depends on the Te-Tip-eratur required in the stove, which is then maintained by a thermostat, not shown in the drawing, with the valve 13 cu £ a :: c: .en :: i ::. b: ending.

Zs: the main Yi ^ - c-rgungsleitung 19 is also provided by means of eir .'- a solenoid operated, normally closed valve 20, for which the control end electromagnet is designated with the reference numeral 21, the electromagnetically operated valve 20 is a door Bypass line 22 in which a bypass valve 2 3 is located. Finally, the main supply line 17 is formed with a further valve 24, which is a. Part of a flame failure sensor device forms a "your container 25 above the gas burner on weis".: The valve 24 is equipped with a small bypass, which enables a gas supply to the gas burner 10, which is to be ignited by means of the electrode 12 "The small one Container IC then heats up sufficiently to open the main passage of valve 2H, which then fully supplies gas burner 10 ₉ if the flame is not extinguished from any-. 2-round *

An example of an embodiment of the bypass valve 2 is shown in detail in FIG. 2; it has a hollow body 2 6 π; with a gas inlet 2 7 and with a gas outlet 2 8 on, I ~. Hollow body 2 6 works with a valve part 29

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a valve seat 30 together, wherein it has a valve rod 31, which in turn on a plate or adjoins a collar 32 within a carrier 3 3 in the interior of the hollow body 2 6. A spring 34 pushes this Valve part 29 on its seat 30. The carrier 33 is connected to a rod 3 5, the other end of which is a Button 36 carries, and which is also provided with a plate 37. Another spring 38 acts between the Plate 37 and the ring 38a, behind which there is an O-ring 38b as a seal, so that the rod 3 5 and the carrier 33 are pressed to the right in FIG. 2 and thereby the valve part 29 into an open position Disengage from seat 30. Furthermore, a pawl 40 is made from a strip of elastic material intended. This pawl 40 is in some suitable manner with the mentioned connection of the thermostatically operated Valve 18 connected.

If the gas burner 10 is to be operated by hand during operation, the switch 14 is in the position shown Brought position, while the switch 19 then by turning the connection on the valve 18 in its on position is closed. This activates the ignition system 13. At the same time, the bypass valve is located as can be seen from Fig. 2, in its open position, so that gas through the main supply line 17 and through the solenoid operated valve which is due to the excitation of the electromagnet in its open position, can flow. As already explained, can the gas then initially through the bypass of valve 24 (controlled by the main opening of the valve) flow and supply the gas burner 10 by means of the electrode 12 after it has been ignited. In the event of a power failure it would close the electromagnetically operated valve, but gas could still pass through the bypass 2 3 to the gas burner reach. It is then necessary to manually apply the gas

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ignite because there is a voltage to activate the Ignition system 13 is missing.

If, on the other hand, the system described is to be operated automatically, quietly, the switch IH is brought into engagement with the contact 16 and the button 36 in Fig. 2 is pushed to the left (after the stop 18 has opened), In order to bring the valve part 29 into its closed position in engagement with its seat 30, the setting of the switch IM- in the automatic operating position and the actuation of the button 36 for closing the bypass valve 23 are expediently carried out by the same movement of the user. The gas can now flow through the main supply line 17 although the connection connected to the valve 18. has been opened to the extent desired because both valves 20 and 23 are in their closed position. If, however, the time switch 11 excites the electromagnet and thus opens the electromagnetic valve 20, the ignition system 13 is activated so that the gas then flows from the right through the main supply line 17 to the gas burner 10 as before. The electrode then ignites that of; Gas burner 10 delivered gas as before. The gas burner 10 is then in operation for a predetermined time set by the timer 11, until the electromagnetic valve is closed again to interrupt the gas supply to the gas burner. While this is Le-it the rod 13 in its inner position t ^e hälcer.j in which the valve 29 is in engagement with seinein; itz 30 aank the fact is that the plate 37 of the Stance 35 behind the pawl 40 of a resilient sheet metal strip is withheld; If, however, before another rcccu run was carried out, which vercur.den with the valve 15 · = connection in its closed position zur-ückcescc-llc \: Li'-J., lead the described connection between ie :: .--- : ^-iCclc: c: "dan elastic sheet-metal strip 39 to ₉ that..

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the metal strip is raised when the connection reaches its switched-off position, so that the valve 2 3 is opened again. The system is then ready for another manually controlled workflow set if button 36 is not pressed again for another automatic operation became.

In practice, the bypass valve 23 can be arranged on the thermostatic valve 18 or formed as part of the same or optionally also provided on the electromagnetically actuated valve 20. As a further alternative to this, not shown in the drawing, the electromagnetically actuated valve 20 and the associated bypass valve 23 can be combined in the gas supply system of a pilot burner. The electromagnetically actuated valve would then normally be closed and the bypass valve normally open so that the gas could reach the pilot burner through the open bypass valve and could be ignited there by means of a suitable electrode. The pilot burner would then heat the associated small container, which in turn controls valve 2k. If, on the other hand, an automatic operation of the device is to be effected, the bypass valve 2 would have to be closed manually by actuating the button in the manner described above, so that the pilot burner would go out and thus also the valve 24 would close until the timer actuated the electromagnetically Valve 20 opens and thus supplies the pilot burner with gas, which is then ignited with the electrode described, so that the associated small container is heated again and, in turn, valve 21 opens. The actual gas burner would then be ignited by means of the pilot burner. In this case, therefore, the electromagnetically operated valve 20 would not be in the main

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_{± 1} - 29Ü8944

supply line 17 arranged, and a gas flow through this line would only by means of the thermostatically controlled valve 18 and the valve 24 controlled, which in turn with the flame failure device connected is.

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Claims (5)

r ".e" - = Ieir.r-direction for the regulation of gas burners _s at /, el-Cher 'a valve by means of an electromagnet is advised :: i ^ bar- and normally kept closed, taiiiroh marked that one of Hand adjustable, t her:;. ;;, statically controlled valve (18) and a bycass ' .22 ) for yes by the solenoid operated valve (2jj are provided _s where the bypass (22) with one :; bypass- Valve (23) is provided, which by hand:;.: Close and connected to the thermostatically controlled valve (ic) iur-ch means which restore the öff-ηυ.η, ΓΞ position of the bypass valve (23) when the thermostatically controlled valve (18) is set in its closed position 9 09838/074
BATH ORIGINAL 2. Control device according to claim 1, characterized in that the bypass valve (23) is arranged on the thermostatically controlled valve (18) or forms part of the same. 3. Control device according to claim 1, characterized in that the bypass valve (2 3) is combined with the valve (20) actuated by means of the electromagnet. 4. Control device according to claim 1, characterized in that the actuated by means of the solenoid valve (20) and the bypass valve (2 3) controls the gas supply to a pilot burner with a small container (2 5) is connected which is part of a Forms sensor device for the flame failure, which further comprises a valve (24) in the main supply line (17) for the regulating gas burner (10). 5. Control device according to claims 1 to M-, characterized in that the bypass valve (23) has a hollow body (26) with a gas inlet (27) and with a gas outlet (28) and with an in between in the hollow body (26) located valve part (29), and that the bypass valve (23) is provided with a handle (33,35,36) protruding from the hollow body (26) which engages the valve part (29J by means of an idle connection and in the direction of a Position is spring-loaded, in which the valve part (29) is no longer in engagement with its seat (3D), while it is held by means of a pawl (29) in another position in which the valve part (29) in engagement with its seat (30), wherein the pawl (39) is connected to the thermostatically controlled valve (18) so that when the latter is set 909838/0743 BATH ORIGINAL ir, -jie - ^ implied; -; Uird triggered ₅ around the handle C -, 23) UNJ return the valve member (11-) disengaged in his former position with its seat (30) ^ .e- za leave 35,36) of the bypass valve (. 9 0 9 0 ^ 8/0743 BATH ORIGINAL