Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23N—REGULATING OR CONTROLLING COMBUSTION
  • F23N1/00—Regulating fuel supply
  • F23N1/007—Regulating fuel supply using mechanical means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23N—REGULATING OR CONTROLLING COMBUSTION
  • F23N1/00—Regulating fuel supply
  • F23N1/005—Regulating fuel supply using electrical or electromechanical means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
  • F24C3/00—Stoves or ranges for gaseous fuels
  • F24C3/12—Arrangement or mounting of control or safety devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23N—REGULATING OR CONTROLLING COMBUSTION
  • F23N2227/00—Ignition or checking
  • F23N2227/36—Spark ignition, e.g. by means of a high voltage
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23N—REGULATING OR CONTROLLING COMBUSTION
  • F23N2235/00—Valves, nozzles or pumps
  • F23N2235/12—Fuel valves
  • F23N2235/24—Valve details
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H3/00—Mechanisms for operating contacts
  • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
  • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

• Flame ignition control device for burners or the like.
• the present invention relates to a flame ignition control device comprising flame adjustment means connected to a gas supply source through at least one valve .
• the adjustment means comprise a driving member composed of a driving shaft mounted so as to rotate about its own longitudinal axis mounted so as to translate in the direction of its own longitudinal axis, such to move between two extreme positions such to move from a maximum withdrawn condition to a maximum insertion condition respectively.
• control unit intended to generate a spark
• control unit comprises two conductor elements connected to an electric supply source and a switch, which switch has a closed condition, where the two conductor elements are connected with each other, and an open condition, where the two conductor elements are not connected with each other .
• the switch further passes from the open condition to the closed condition by the movement of a member switching the condition of the switch which is moved by the translation of the driving shaft, such that the closed condition of the switch corresponds to the maximum insertion condition of the driving shaft.
• the one just described is the common arrangement of a control device for igniting a flame through a gas cock .
• the present invention preferably is directed to gas cocks, but it can be easily adapted to different systems .
• the device of the present invention applied also to controls equivalent to the gas cock, such as for example electric thermostats, gas thermostats, both for detecting signals and for carrying out controls.
• controls equivalent to the gas cock such as for example electric thermostats, gas thermostats, both for detecting signals and for carrying out controls.
• Some devices known in the prior art overcome such problem by providing control systems that, by using only one hand, allow both the functions to be carried out, controlling the gas cock and controlling the igniter .
• This solution is accomplished by assembling a momentary or permanent switch on the cock then by controlling it by the driving shaft of the cock by means of linkages and/or transmissions.
• the driving shaft has two degrees of freedom, firstly it is necessary to carry out a translation along its own longitudinal axis, then to rotate it to adjust the amount of gas to be supplied to the burner, that is to adjust the generated flame.
• the translation of the driving shaft along its own longitudinal axis allows the valve to be opened and also a spark to be generated, by the provision of a switch that, once operated namely in the closed condition, causes the two conductor wires to be connected.
• control unit is rigidly assembled to the device body, it houses two series of wires therein mechanically crimped to two contacts that are operated by a control lever.
• control lever is then controlled by a control washer rigidly fitted on the shaft of the gas cock.
• the pressure exerted on the cock activates the contact of the switch by means of the control lever.
• the present invention achieves the above aims by providing a flame ignition control device such as described above, wherein the switching member is provided coaxial to the driving shaft.
• the coaxial positioning of the switching member not only allows a gas burner to be turned on only using one hand and with only one control, but it also gives to the device of the present invention accuracy in carrying out the control and stiffness.
• the switching member is composed of a support body placed underneath the driving shaft.
• Such support body is interposed between the driving shaft and the valve body, and it houses the control unit and at least one driving pin therein .
• the driving pin passes from a condition retracted into the support body, where the driving pin abuts against the walls of the valve body, to a condition withdrawn with respect to the support body.
• the retracted condition of the driving pin corresponds to the maximum insertion condition of the driving shaft.
• the support body is integral with the driving shaft only for the translation along its own longitudinal axis.
• such arrangement combines also the protection against possible liquid leakages with the properties described above about stiffness of the device and accuracy of the control .
• control unit houses the conductor elements and the electric part is protected by the support body that does not allow liquids to go in contact with the switch, protecting its operation.
• the driving pin is firmly kept in the withdrawn condition by at least one elastic element, such that the passage from the withdrawn condition to the retracted condition of the driving pin moves a driving lever, which driving lever acts on the switch for switching it from the open condition to the closed condition.
• the arrangement of the driving lever and of the driving pin can be any one known in the prior art.
• control lever is a cam whose movement moves a part of the switch such to guarantee the closed condition thereof.
• means for locking the support body which locking means fasten the support body to the valve body, such to allow it to translate integrally with the driving shaft along the longitudinal axis of the driving shaft, preventing the support body from rotating.
• the locking means work in synergy with the fastening means: the fastening means firmly fasten the support body to the driving shaft such to make it integral therewith, while the locking means lock the support body to the valve body such to prevent it from rotating.
• the support body comprises an outer case with a substantially parallelepiped shape, open at at least the lower side.
• the outer case provides an area housing the control unit and it has at least one upper wall, from which at least one fastening tooth extends for fastening the outer case to the driving shaft.
• the opening at the lower side allows the device of the present invention to be easily inspected, while maintaining the upper area as protected, which is the most critical area due to the passage of liquids inside the control unit.
• the outer case will be made of a plastic material, such to easily adapt the device of the present invention to the different valve bodies or to assembling needs.
• the driving shaft has, at its own lower end, an annular narrowing, the at least one fastening tooth being fastened at the annular narrowing.
• the fastening of the support body obtained in this manner is able to withstand several dozens of kilograms of thrust, however allowing the driving shaft to freely rotate .
• the outer case has a lower part providing a shape complementary to the upper part of the valve body, with which it is in contact.
• the outer case has at least one, preferably two, side walls, said locking means being composed of at least one tab extending downwardly from each of the two side walls .
• Such tabs can be further made as one piece with the support body.
• a variant embodiment of the device of the present invention provides the upper part to be inclined towards the valve body.
• the upper wall has an upwardly facing concavity such to form a surface inclined downwardly or a cambered surface, such to discharge possible liquids coming from the top towards regions far from the control unit and the switch.
• the upper wall has an annular element extending towards the driving shaft, which annular element is placed coaxial to the driving shaft .
• annular element gives to the device of the present invention a further protection against water since the annular element can be provided with such a height to exit with respect to the surface of the top where the burner is installed in combination with the device of the present invention.
• the switch provided inside the control unit can be composed of any switch known in the prior art.
• the switch is composed of two sheetlike elements, of which a fixed element and a movable element, made of elastically deformable conductive material .
• the movable element is moved by the switching member such that the fixed element is in contact with the movable element in the closed condition of the switch, while the fixed element is separated with respect to the movable element in the open condition of the switch.
• hooking members for fastening the movable element and/or the fixed element to at least one of the two conductor elements.
• switches of each device can be connected with each other by means of the conductor elements composed of connection wires, such to form a harness intended to satisfy the quantitative needs of a single appliance and/or product.
• the characteristics just described advantageously allow complex switch systems to be made without interruption, in particularly a switch for each gas cock, called as harness, also as combination of a momentary and continuous switch such to make a control system under the knob and to allow complex cooking systems with several cocks to be easily assembled.
• the hooking members are composed of housing seats obtained in the thickness of the walls of the movable element and of the fixed element.
• the housing seats have a leading entrance and a housing area having a profile complementary to at least a part of the section of the conductor elements.
• At least one sensor intended to detect the position of said driving shaft.
• at least one sensor intended to detect the operation of the control unit.
• Fig. la is a flame ignition control device of the prior art
• Fig. lb is the control unit of the device of figure la;
• Fig.2 is a preferred embodiment of the device of the present invention.
• Figs .3 and 4 are two perspective views of the support body of the device of the present invention.
• Fig.5 is a variant embodiment of the control unit of the device of the present invention.
• Fig.6 is a variant embodiment of the device of the present invention.
• FIG. la and lb show a flame ignition control device belonging to the prior art.
• Such device comprises flame adjustment means connected to a gas supply source through at least one valve .
• the adjustment means comprise a driving member composed of a driving shaft 1 mounted so as to rotate about its own longitudinal axis mounted so as to translate in the direction of its own longitudinal axis, such to move between two extreme positions such to move from a maximum withdrawn condition to a maximum insertion condition respectively.
• the driving shaft 1 can rotate in the direction denoted by arrow A for adjusting the amount of gas to be supplied to a burner and it can translate in the direction of arrow B.
• the translation allows the gas supply valve 2 to be opened, as well as the control unit 3 to be operated as it will be described below.
• the device comprises a control unit 3 intended to generate a spark, which comprises two conductor elements 31, 32 connected to an electric supply source and a switch 4, which has a closed condition, where the two conductor elements 31, 32 are connected with each other, and an open condition, where the two conductor elements 31, 32 are not connected with each other.
• the switch 4 passes from the open condition to the closed condition by the movement of a member switching the condition of the switch 4, which is moved by the translation of the driving shaft 1, such that the closed condition of the switch 4 corresponds to the maximum insertion condition of the driving shaft 1.
• the driving member is composed of a control level 11 and of a washer 12.
• the washer 12 is rigidly fitted on the driving shaft 1 and it pushes the control lever 11 downwardly when the driving shaft 1 translates downwards.
• the pressure exerted on the driving shaft 1 therefore moves the control lever 11 having its end part inserted into the control unit 3.
• the switch 4 is composed of a movable contact 41 and a fixed contact 42, while the control unit 3 is rigidly assembled to the body of the device, it houses two series of wires 31, 32 therein mechanically crimped to the movable 42 and fixed 41 contacts.
• the control lever 11 pushed downwardly in turn pushes the movable contact 42 such to elastically deform it and to put it in contact with the fixed element 41, such to achieve the closed condition of the switch 4.
• the closed condition of the switch 4 allows the spark to be generated that in combination with the gas allows the flame to be ignited.
• the switching member of the device of the present invention is provided coaxial to the driving shaft 1.
• Particularly figures 2 and 3 show a preferred embodiment of the device of the present invention.
• the switching member is composed of a support body 5 placed underneath the driving shaft 1, and interposed between the driving shaft 1 and the body of the valve 2.
• the support body 5 houses the control unit 3 and at least one driving pin 51 inside it, which driving pin 51 moves from a condition retracted into the support body 5, where the driving pin 51 abuts against the walls of the valve body 2, to a condition withdrawn from the support body 5.
• the retracted condition of the driving pin 51 corresponds to the condition of maximum insertion of the driving shaft 1.
• the driving pin 51 by going into the support body
• Figure 5 closes the switch 4 inserted into the control unit 3 housed into the support body 5.
• Figure 5 shows a possible variant embodiment of the device of the present invention, intended to show the operating principle of the pin 51 and of the switch 4.
• the driving pin 51 is firmly kept in the withdrawn condition by at least one elastic element 51, such that the movement from the withdrawn condition to the retracted condition of the driving pin 51 moves a driving lever 53.
• the driving lever 53 acts on the switch 4 for switching it from the open condition to the closed condition .
• the driving level 53 acts as a kind of cam on the movable contact 42 of the switch 4 : by exerting a pressure on the driving shaft 1, the spring 52 is compressed, the pin 51, abutting on the upper wall 21 of the valve body 2, moves upwardly, drags the lever 52 that acts as a cam and it pushes the movable contact 42 towards the fixed contact 41, closing the switch 4.
• the spring 52 is released and it pushes downwardly the driving pin 51 that is no more hindered by the upper wall 21 of the valve body 2 and then the lever 53 stops pressing on the movable contact 42, causing the switch 4 to return to the open condition.
• the switch depending on the cam that is made, can be of the momentary, press type, particularly useful for controlling igniters or of the rotary and continuous type, particularly useful for controlling electronic control systems.
• the support body 5 can house inside the control unit 3 both the types of operation, momentary and/or continuous one.
• the support body 5 provides one access only from the lower side, to the upper part and side parts of the control system, except for the inlet and outlet of the conductor elements 31 and 32 there are no apertures or joints of any type such to avoid possible passages for the entrance of liquids.
• control unit 3 The region of the control unit 3 is accessible and assembled only from the lower part of the support body 5.
• the support body 5 can provide protection elements 54 placed near the inlet and outlet of the conductor elements 31 and 32, such protection elements 54 can divert possible liquids coming from above. Therefore advantageously the support body 5 comprises an outer case with a substantially parallelepiped shape, which outer case is open at least at the lower side, the outer case providing a region for housing the control unit 3.
• the outer case has at least one upper wall 55 at least one fastening tooth 56 extending therefrom for fastening the outer case to the driving shaft .
• the outer case comprises three fastening teeth 56, such to homogeneously distribute the pressing thrust exerted on the driving shaft 1.
• control unit 3 can be closed also at the lower side, such to prevent external agents from entering therein.
• the driving shaft 1 has, at its own lower end, an annular narrowing.
• Such annular narrowing forms a sealing groove to which the three fastening teeth 56 are fastened, such as shown in figure 2.
• Such locking means for example can be made by means of a form-fit of the support body 5 with the outer walls of the valve body 2.
• the outer case it is possible to provide the outer case to have at least two side walls 57, the locking means being composed of at least one tab 58 extending downwardly from each one of the two side walls 57.
• the support body is made of a plastic material and it is possible to provide the tabs 58 and the fastening teeth 56 to be made as one piece with the outer case.
• the upper wall 55 of the support body 5 is inclined towards the valve body 2.
• the shape of the support body 5 is adaptable to the shape of the valve body 2 not during the production step but directly by the customer in the assembling step on the line.
• the rear plastic of the support body 5 is a standard plastic where an adapter still made of plastic will be inserted for the coupling to the selected valve.
• Figure 6 shows a further embodiment of the device of the present invention, particularly the upper wall 55 has an annular element 551 extending towards the driving shaft 1.
• the annular element 551 preferably is placed coaxial to the driving shaft 1.
• annular element 551 allows a higher protection against falling liquids to be obtained and in order to guarantee a complete protection it is further possible to place a suitable gasket, such as an O-ring, placed at the base of the annular element 551, at the upper wall 55.
• a suitable gasket such as an O-ring
• the switch 4 advantageously is composed of two sheet-like elements, of which a fixed element 41 and a movable element 42, made of elastically deformable conductive material .
• the movable element 42 is moved by the switching member such that the fixed element 41 is in contact with the movable element 42 in the closed condition of the switch 4, and the fixed element 41 being separated from the movable element 42 in the open condition of the switch 4.
• hooking members for fastening the movable element 42 and/or the fixed element 41 to at least one of the two conductor elements 31, 32.
• the fixed element 41 and the movable element 42 are connected to both the conductor elements 31 and 32.
• the hooking members are composed of housing seats
• housing seats 43 have a leading entrance and a housing area having a profile complementary to at least a part of the section of the conductor elements 31 and 32.
• At least one sensor intended to detect the position of the driving shaft 1.
• the device of the present invention therefore can incorporate a position transducer, for example angle/resistance, a magnetic, position one made by suitable arrangements, for example by the deposition of a resistive paste on a substrate such to have a continuous transducer or for example by using fixed resistances such to have a stepped transducer.
• a position transducer for example angle/resistance, a magnetic, position one made by suitable arrangements, for example by the deposition of a resistive paste on a substrate such to have a continuous transducer or for example by using fixed resistances such to have a stepped transducer.
• Such sensor can be any type known in the prior art and for example it can be intended to evaluate the condition of the switch 4 , that is to evaluate whether it is open or closed, also on the basis of the condition of the driving shaft 1.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanically-Actuated Valves (AREA)
• Indication Of The Valve Opening Or Closing Status (AREA)
• Feeding And Controlling Fuel (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=51799157

Family Applications (1)

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Cited By (4)

Citations (10)

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• 2015
  • 2015-07-22 ES ES15756694T patent/ES2762711T3/es active Active
  • 2015-07-22 PL PL15756694T patent/PL3175176T3/pl unknown
  • 2015-07-22 EP EP15756694.4A patent/EP3175176B1/de active Active
  • 2015-07-22 WO PCT/IB2015/055558 patent/WO2016016773A1/en active Application Filing

Patent Citations (10)

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