EP1653155A2 - Vorrichtung zum Reinigen der Innenflächen eines Garofens - Google Patents

Vorrichtung zum Reinigen der Innenflächen eines Garofens Download PDF

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Publication number
EP1653155A2
EP1653155A2 EP05109840A EP05109840A EP1653155A2 EP 1653155 A2 EP1653155 A2 EP 1653155A2 EP 05109840 A EP05109840 A EP 05109840A EP 05109840 A EP05109840 A EP 05109840A EP 1653155 A2 EP1653155 A2 EP 1653155A2
Authority
EP
European Patent Office
Prior art keywords
arrangement according
oven
electromagnetic valve
cleaning
conduits
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05109840A
Other languages
English (en)
French (fr)
Other versions
EP1653155B1 (de
EP1653155A3 (de
Inventor
Raus Dragan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux Professional SpA
Original Assignee
Electrolux Professional SpA
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Filing date
Publication date
Application filed by Electrolux Professional SpA filed Critical Electrolux Professional SpA
Publication of EP1653155A2 publication Critical patent/EP1653155A2/de
Publication of EP1653155A3 publication Critical patent/EP1653155A3/de
Application granted granted Critical
Publication of EP1653155B1 publication Critical patent/EP1653155B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
    • F24C14/005—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning using a cleaning liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays

Definitions

  • the present invention refers to an improved arrangement intended for use in cleaning inner surfaces of cooking ovens, in particular cooking ovens for professional kitchens and mass catering applications.
  • Cooking ovens as used in both residential or consumer applications and mass catering applications in professional kitchens, are generally known to be systematically subject to soiling, i.e. becoming dirty to an even heavy extent owing to a number of factors, as this is well-known to all those skilled in the art.
  • the substances that tend to settle onto the walls of an oven during cooking mostly include cooking debris and residues, such as small fragments of food, spices or flavours, which, owing to the intense heat which the food being prepared is submitted to, keep bursting at the surface of the food to splash and settle onto the very hot walls of the oven cavity, where they eventually get scorched and charred within a very short period of time.
  • the first one of these categories includes those solutions that share the basic fact of making use of cleaning arrangements that are entirely incorporated in the structure and the other functional devices and parts of the oven, and that are activated to operate through working cycles normally residing in the operating programmes provided in the control unit of the same oven; these solutions are generally exemplified in EP 0 652 405 A1, as well as the patent documents cited as references thereto.
  • this kind of solution requires being integrated in the design and engineering process of the oven, i.e. being co-designed and engineered, so that, when an existing oven of a traditional kind has at a later time to be fitted with means for cleaning the interior thereof, it is practically impossible for this solution to be implemented.
  • the second above-mentioned category includes on the contrary those solutions which call for the implementation and use of external add-on means that must each time be preliminarily installed inside the oven cavity, and that - upon completing the cavity cleaning process - must therefore be again removed from the oven cavity and suitably stored somewhere else.
  • the present invention is substantially based on subdividing the cleaning members and devices described in the afore-cited patent EP 1 270 096 A2 into two physically separated assembles, wherein one of these assemblies is located inside the cooking cavity 1, while the other one is located outside.
  • this second assembly provided for installation outside the cooking cavity is brought together and contained inside an appropriate casing 2, which can in turn be mounted on a small transportable cart, so as to be able to be moved close to the oven when the latter has to undergo a cleaning operation, and then moved away therefrom to a more convenient resting position, or storage place, when it is not being used.
  • the assembly that is located inside the oven cavity is comprised of one or more distribution chambers 3, 4, which receive the liquid to be thrown against the oven walls, and which - via suitable rotary nozzles - spray such liquid against said walls at a sufficiently high pressure and, as a result, velocity.
  • this internal assembly shall be explained in greater detail further on; anyway, it is most obviously desirable that this assembly be adapted to distribute the swirling jet of liquid towards the entire, or at least almost the entire inner surface of the oven, and this can for instance be achieved by providing a single distribution chamber located at the bottom of the oven cavity and so arranged as to throw its swirling jet of liquid upwards against the walls of the same cavity, as this is illustrated by way of example in Figure 7.
  • the assembly that is located outside the oven cavity, and which shall be described in greater detail further on, is connected to the internal assembly via a plurality 5 of conduits that are adapted to transfer the cleaning liquid and, as it can be readily appreciated, have to pass through the access opening of the oven; during the cleaning operation, the oven door 6 must of course be kept duly shut so as to prevent liquid from splashing outside the oven cavity. Therefore, in order to allow for such conduits to pass into the oven cavity even when the oven door is closed, the same conduits are shaped and arranged in a flat manner so as to occupy the smallest possible thickness, i.e. to be as thin as possible when passing through the door sealing gasket.
  • a rigid protection member 126 which wraps around and encloses a small portion of the length of said conduits, and which is roughly in the shape of a reverse U and made in the form of a flat band or brace that is appropriately bent and curved so as to be able to sit stably astride of the upper edge of the oven door.
  • This rigid protection member receives and acts as a sheath for the afore-cited conduits passing therethrough, which can therefore be run parallel to each other and following the contour of said protection member, in such manner as to enable the same conduits to occupy the smallest possible thickness, while being safely protected against unduly high pressures and stresses.
  • this protection member 26 is provided with a proximity sensor or contact 7 adapted to detect - when said member is mounted on the door - if the oven door is closed or open depending on said sensor or contact being or not in contact with, or adequately close to, an appropriate portion of a jamb of the oven.
  • the signal issued by this sensor 7 is sent via an appropriate connection (not shown) to properly provided control means 30 associated to the external assembly.
  • the liquid-carrying circuit of this external assembly includes:
  • said delivery conduit 15 Downstream of said pump 16, said delivery conduit 15 divides again into two different and separate transfer channels 17 and 18, which are referred to in this way because they actually transfer the liquid flowing through them from said outside assembly into said distribution chambers 3 and 4 provided in the internal assembly, as this has already been described in part hereinbefore.
  • Each one of said transfer channels is furthermore provided with a third electromagnetic valve 19 and a fourth electromagnetic valve 20, respectively.
  • said outside assembly there is branching out - for connection to the water supply mains - a water supply conduit 21 that is provided with a respective electromagnetic valve 26 and that - downstream of said valve - branches itself out into two distinct water supply conduits 22 and 23, which are in turn provided with a fifth electromagnetic valve 24 and a sixth electromagnetic valve 25, respectively.
  • Said electromagnetic valve 26 on the water supply conduit from the mains 21 will be referred to and indicated as seventh electromagnetic valve 26.
  • Said two water supply conduits extend outside said external assembly so as to reach up to and debouch in an independent manner into said two distribution chambers 3 and 4.
  • an appropriate pressure sensor 27 - of a type generally known as such in the art - to be located on said water supply conduit 21 downstream of the respective electromagnetic valve 26.
  • the signal generated by this pressure sensor 27 is then sent to a control unit 30, which will process this signal and compare it with a predetermined threshold value; should this comparison indicate that the detected signal is lower than a value corresponding to a minimum pressure P min that is considered still acceptable in view of ensuring a sufficient level of cleaning effectiveness, and if this comparison is performed prior to the cleaning cycle being started, the afore-mentioned control unit will interrupt the cycle starting process and, as a result, prevent the cleaning cycle from going on; if such comparison is on the contrary performed after the cleaning cycle has been started, then the cycle itself is allowed to go on, however under activation of an external warning indication, which may be of any conventional kind, e.g. an optical or sound alarm.
  • an external warning indication which may be of any conventional kind, e.g. an optical or sound alarm.
  • a second pressure sensor 40 which is adapted to detect whether the pressure in said conduit is higher than a highest acceptable pressure. Should a comparison indicate that the signal generated by the sensor is higher than a value corresponding to a maximum pressure P max that is considered still acceptable in view of preventing the safety and integrity of the liquid-carrying circuits from being jeopardized, following procedure is started: if said comparison is performed prior to the cleaning cycle being started, the afore-mentioned control unit will interrupt the cycle starting process and, as a result, prevent the cleaning cycle from going on; if such comparison is on the contrary performed after the cleaning cycle has been started, then the on-going cycle is interrupted automatically.
  • an auxiliary conduit 28 which, as duly provided with an eighth electromagnetic valve 29 of its own, branches off the water supply conduit 21 downstream of the electromagnetic valve 26 thereof, and extends to debouch into the conduit 12, which departs from the rinsing-aid reservoir 10, at a site upstream of the second electromagnetic valve 14 thereof.
  • the above-mentioned distribution chambers 3 and 4 are two chambers that comprise two respective rotary nozzles, wherein it is the same pressure of the liquid to be sprinkled that causes said nozzles to be brought into a continuous rotary motion and, as a result, a corresponding swirling effect of the jet, or jets, of liquid being sprayed.
  • the two chambers may be provided in the form of an arrangement in which they are physically separated from each other; however, in view of further simplifying the overall construction and installation, these two chambers are preferably joined together rigidly into a single body 31 and are so oriented as to have the upper chamber 3 generating a swirling jet 32 that is prevailingly directed upwards, as well as towards the zones lying at an intermediate height of the oven cavity, and the lower chamber 4 generating a corresponding swirling jet 33 directed prevailingly downwards, starting again from the intermediate areas of the oven cavity.
  • the inventive oven cleaning arrangement is further provided with programme control means for controlling the sequence of the various operation cycles; upon the arrangement having been properly installed with its assemblies inside and outside the oven as indicated hereinbefore, the water and power connections having been completed, the detergent and rinsing-aid reservoirs having been filled, and so on, the control unit 30 is activated by the operator through the input of the selection corresponding to a desired cleaning cycle.
  • control unit 30 is connected via generally known means to all said electromagnetic valves, said delivery pump 16 and said pressure sensor 27.
  • the control unit 30 is arranged so as to be adapted to sequentially send appropriate control signals to all said electromagnetic valve and the delivery pump 16, as well as to receive and process the signal from the sensor 27, so as to ensure that the cleaning cycle so selected by the operator is actually performed in an orderly, regular manner as programmed, according to techniques and procedures that are generally known as such in the art, since largely used in the operation of other appliances and equipment for both residential and professional use.
  • the inventive oven cleaning arrangement may be designed to carry out, the main one will of course include a first detergent distribution phase, i.e. a phase in which only liquid detergent product is sprayed onto the oven cavity walls, a second resting phase, i.e. a phase that is intended to allow the detergent to act on and condition the soil to be removed from the walls, and a third phase for spraying fresh water onto the walls so as to flush off and remove both detergent and soil residues.
  • this third phase is a plain rinsing phase, while substances and debris being flushed off in this phase collect by gravity onto the bottom of the oven cavity, from which they can be then removed with generally known means.
  • a cleaning cycle may be followed also by a suitably selected and set final rinsing or "brightening" cycle consisting of a single working phase, in which the rinsing aid, or brightener product, from the corresponding reservoir is first mixed with fresh water flowing in from the water supply mains, and is then sprayed onto the walls of the oven cavity for a pre-set period of time.
  • the various parts used to deliver and spray the detergent i.e. valves, conduits, and the like, will of course not be used during this final rinsing cycle.
  • a further improvement derives from the fact that all said pumps and electromagnetic valves are operated on a rather low electric voltage, so as to avoid all risks connected with directly using the regular power supply voltage in an apparatus in which there are circulating water and other liquid substances.
  • a power-supply unit with a related storage battery, or accumulator is associated to said liquid-carrying and flow control means, in which said unit and said accumulator are so provided and arranged as to enable said accumulator to be adapted to supply the required electric power with the necessary characteristics for the operation of said functional parts such as pump, electromagnetic valves, sensor, control unit 30, possibly provided indicator lights, and the like.
  • the above-cited power-supply unit can be connected to the external power supply line so as to allow said storage battery, or accumulator, to be recharged without any particular urgency and, above all, without any danger.
EP20050109840 2004-10-29 2005-10-21 Vorrichtung zum Reinigen der Innenflächen eines Garofens Not-in-force EP1653155B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPN20040079 ITPN20040079A1 (it) 2004-10-29 2004-10-29 Dispositivo perfezionato per la pulizia delle superfici interne dei forni di cottura

Publications (3)

Publication Number Publication Date
EP1653155A2 true EP1653155A2 (de) 2006-05-03
EP1653155A3 EP1653155A3 (de) 2009-10-07
EP1653155B1 EP1653155B1 (de) 2012-09-12

Family

ID=35677361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050109840 Not-in-force EP1653155B1 (de) 2004-10-29 2005-10-21 Vorrichtung zum Reinigen der Innenflächen eines Garofens

Country Status (2)

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EP (1) EP1653155B1 (de)
IT (1) ITPN20040079A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059807A1 (en) * 2012-04-02 2015-03-05 Convotherm Elektrogerate Gmbh Cleaning system and method with air flushing of detergent/rinse pipes
WO2016059129A3 (de) * 2014-10-17 2016-06-09 Guggenberger Reinigungstechnik E.K Verfahren und vorrichtung für die backofenreinigung
CN109550758A (zh) * 2018-11-26 2019-04-02 吴斌 一种医疗试剂盒的清洗设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101370411B1 (ko) 2012-08-24 2014-03-06 린나이코리아 주식회사 스팀 컨벡션 오븐

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0466663A2 (de) 1990-07-09 1992-01-15 Monica Corona Vorrichtung zum Messen und Mischen einer Reinigungsflüssigkeit mit Wasser und komprimierter Luft unter Kontrolle einer Zerstäubungslanze, wobei auch der Strahl in Schaum umgesetzt wird
DE19838864A1 (de) 1998-08-26 2000-03-09 Rational Gmbh Verfahren und Vorrichtung zur Reinigung von Gargeräten
US20030200998A1 (en) 1999-02-08 2003-10-30 Briggs & Stratton Power Products Group, Llc Multi-container pressure washer and related product selecting valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135270A (en) * 1977-03-03 1979-01-23 Detroit Tool & Engineering Co. Portable carwash apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0466663A2 (de) 1990-07-09 1992-01-15 Monica Corona Vorrichtung zum Messen und Mischen einer Reinigungsflüssigkeit mit Wasser und komprimierter Luft unter Kontrolle einer Zerstäubungslanze, wobei auch der Strahl in Schaum umgesetzt wird
DE19838864A1 (de) 1998-08-26 2000-03-09 Rational Gmbh Verfahren und Vorrichtung zur Reinigung von Gargeräten
US20030200998A1 (en) 1999-02-08 2003-10-30 Briggs & Stratton Power Products Group, Llc Multi-container pressure washer and related product selecting valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150059807A1 (en) * 2012-04-02 2015-03-05 Convotherm Elektrogerate Gmbh Cleaning system and method with air flushing of detergent/rinse pipes
US9964311B2 (en) * 2012-04-02 2018-05-08 Convotherm Elektrogeraete Gmbh Cleaning system and method with air flushing of detergent/rinse pipes
WO2016059129A3 (de) * 2014-10-17 2016-06-09 Guggenberger Reinigungstechnik E.K Verfahren und vorrichtung für die backofenreinigung
CN109550758A (zh) * 2018-11-26 2019-04-02 吴斌 一种医疗试剂盒的清洗设备
CN109550758B (zh) * 2018-11-26 2020-07-31 深圳市光与生物科技有限公司 一种医疗试剂盒的清洗设备

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Publication number Publication date
EP1653155B1 (de) 2012-09-12
EP1653155A3 (de) 2009-10-07
ITPN20040079A1 (it) 2005-01-29

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