EP3599421B1 - Système de nettoyage destiné au nettoyage de l'espace de cuisson d'un appareil de cuisson - Google Patents

Système de nettoyage destiné au nettoyage de l'espace de cuisson d'un appareil de cuisson Download PDF

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Publication number
EP3599421B1
EP3599421B1 EP19187818.0A EP19187818A EP3599421B1 EP 3599421 B1 EP3599421 B1 EP 3599421B1 EP 19187818 A EP19187818 A EP 19187818A EP 3599421 B1 EP3599421 B1 EP 3599421B1
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EP
European Patent Office
Prior art keywords
cleaning
water
cooking chamber
designed
cleaning agent
Prior art date
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Active
Application number
EP19187818.0A
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German (de)
English (en)
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EP3599421C0 (fr
EP3599421A1 (fr
Inventor
Robert KÜHN
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.)
DEBAG DEUTSCHE BACKOFENBAU GmbH
Original Assignee
Debag Deutsche Backofenbau GmbH
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Publication of EP3599421A1 publication Critical patent/EP3599421A1/fr
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Publication of EP3599421C0 publication Critical patent/EP3599421C0/fr
Publication of EP3599421B1 publication Critical patent/EP3599421B1/fr
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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

Definitions

  • the invention relates to a cleaning system and a method for cleaning the cooking chamber of a cooking appliance with a ventilation device.
  • Devices for treating food are used for the thermal preparation of food and, depending on the application, include a large number of differently designed devices.
  • Food such as baked goods, is prepared in the cooking chamber of the cooking appliance.
  • nozzles are often used, which are either fixed or movable. There are a number of known solutions for this.
  • Rotatably mounted nozzles are used, for example, in DE 42 23 451 C2 mentioned.
  • a spray nozzle in the middle of the ceiling of the furnace interior, which distributes liquid media in the interior.
  • the reservoir for detergent or rinse aid is outside the cooking compartment. From the EP 1 147 731 B1 in turn, a more favorable positioning of the ceiling nozzle is known, which also covers the area around the fan wheel.
  • the active ingredient is in a disposable or reusable cartridge, which is itself designed as a ceiling nozzle.
  • the treatment agent filled into the cartridge can be taken up as granules, powder, gel, block or liquid.
  • the oven in turn, has a water supply, such as a water tank or fresh water line, to feed water under pressure into the cartridge using a pump. The water is removed from the interior via a drain pipe.
  • a pump for transporting the detergent is, for example, in the DE 10 2015 103 673 A1 described.
  • the pump is integrated in the cleaning tank, so that the suction and pressure lines are in the tank and any leakage that may occur will not cause any damage.
  • a solid detergent is mixed with a solvent (water) in a reservoir by supplying kinetic energy - for example via a nozzle - in order to mix a liquid detergent.
  • the cleaning agent is fed into the cooking chamber through a number of crossing points, which are connected to the reservoirs, with the disadvantage that there is a complex structure and, as a result, a more difficult process.
  • the used solution is discharged through a drain, the drain only serving as such.
  • the EP 0 801 271 A1 shows a spray nozzle with regard to the cleaning of an oven interior, which is connected directly to a pump, the pump conveying the cleaning agent from a tank.
  • the DE 199 50 920 C2 discloses a cleaning device with at least two rotor arms, each with at least one spray nozzle.
  • the DE 100 17 966 A1 describes a method and a device for cleaning the interior of a cooking appliance.
  • the fan compartment is separated from the cooking compartment by air baffles.
  • the liquids required for cleaning are introduced from a reservoir into the cooking chamber as a spray jet by means of a fan wheel via a spray nozzle.
  • the spray jet in the blower room is directed against the flow of the blower wheel.
  • the device comprises, among other things, a container for a cleaning agent.
  • the cleaning agent which has been liquefied and/or diluted by heating via a heating device and/or a fresh water supply, is fed into a storage tank via a rinsing nozzle.
  • the cleaning solution is pumped by means of a pump Nozzles conveyed into the cooking chamber, whereby the used cleaning solution is drained off via an outlet sieve in the floor of the cooking chamber and, if necessary, can be used for a new run by being fed back into the storage tank.
  • the object is therefore to provide a system that overcomes the disadvantages of the prior art.
  • the aim is to provide a system for the chemical cleaning of cooking appliances that works reliably and is able to meter and distribute small amounts of fluid efficiently and thus ensures that the cooking chamber of a cooking appliance is cleaned as resource-savingly, economically and automatically as possible.
  • the object is achieved by a cleaning system and a method for cleaning a cooking chamber according to the independent claims.
  • Advantageous developments of the invention are specified in the dependent claims.
  • a first aspect of the invention relates to a cleaning system for cleaning the cooking chamber of a cooking appliance with a ventilation device, having a supply system which includes at least a first supply device for water.
  • the first supply device for water has a reservoir for water and, arranged in the flow direction of the water, an element for increasing the pressure and a water non-return valve.
  • the cleaning system according to the invention comprises at least one second feed device for cleaning agents, which has a reservoir for cleaning agents and, arranged in the flow direction of the cleaning agent, a cleaning agent delivery unit and a cleaning agent non-return valve.
  • the cleaning system according to the invention also has a Circulation circuit, the components of which are at least one connecting device which is in contact with a first opening of the cooking chamber and is designed as an outlet or inlet, at least one circulating device, at least one shut-off element which is designed in such a way that the connecting device and the return are fluidic connects or separates from each other, wherein in the case of a fluidic separation the obturator is designed such that it fluidly connects the connecting device to a drain, at least one return which is in contact with a second opening of the cooking chamber and is arranged along the vertical above the connecting device is and at least one distribution device.
  • a Circulation circuit the components of which are at least one connecting device which is in contact with a first opening of the cooking chamber and is designed as an outlet or inlet, at least one circulating device, at least one shut-off element which is designed in such a way that the connecting device and the return are fluidic connects or separates from each other, wherein in the case of a fluidic separation the
  • the cleaning system comprises a control device with a computer program product, which is connected to the shut-off element in terms of information technology.
  • the components of the circulation circuit are fluidically connected to one another by connecting elements.
  • the first and second feed devices of the feed system open out in the direction of flow in the distributor device.
  • the cooking appliance In order to be able to implement the cleaning system according to the invention, the cooking appliance must have features designed for this purpose. These features are well known and will only be described in more detail below where necessary.
  • the cooking appliance has a ventilation device, which advantageously makes it possible to implement the cleaning system according to the invention and the method according to the invention in the first place.
  • the ventilation device serves to swirl the air in the cooking chamber during cooking.
  • the ventilation device in the method according to the invention can also be used simultaneously to clean the cooking chamber by distributing liquid flowing into the cooking chamber via a return flow in the cooking chamber.
  • the ventilation device can also be based on a different operating principle.
  • the ventilation device can thus be designed as an injection device.
  • the cooking appliance must have at least one exhaust air device for drying.
  • the exhaust air device can be designed as an exhaust air flap (also called vapor flap or vapor valve) or a motorized ball valve.
  • the cooking appliance also has a first opening. Furthermore, the cooking appliance has a second opening.
  • a further aspect of the invention relates to a cooking appliance which has a cleaning system according to the invention and a cooking chamber with a ventilation device.
  • the cleaning system is at least partially integrated in the cooking appliance.
  • the cleaning system according to the invention has a feed system.
  • the delivery system includes a large number of components.
  • the feed system is not limited to the listed components. Rather, other components such as additional connectors, for example fittings or plug connectors, can also be installed in the respective feed devices.
  • the components of the feed devices are fluidically connected to one another by connecting elements.
  • the connecting elements of the feed devices can be in the form of lines and can be selected from pipes or hoses.
  • the tubes or hoses can be flexible or rigid.
  • the supply system comprises at least one first supply device for water.
  • the first supply device for water has a reservoir for water.
  • the reservoir for water represents one of the two ends of the first feed device. The direction of flow of the water begins from here.
  • the first feed device has an element for increasing the pressure.
  • the element for increasing the pressure directs the water from the water reservoir through the water non-return valve via the distributor device into the circulation circuit.
  • the element for increasing the pressure is preferably arranged in the flow direction of the water.
  • the element for increasing the pressure is designed as a water inlet valve or pressure accumulator.
  • the first feed device can have a water delivery device instead of an element for increasing the pressure.
  • the water delivery device is designed as a pump, particularly preferably as a self-priming pump.
  • the water delivery device is designed as a self-priming pump.
  • the water delivery device is designed as an oscillating piston pump, a membrane pump or a peristaltic pump.
  • the water conveying device is located directly in the connecting element as a submersible unit the first feed device, for example in the tube.
  • the water delivery device is designed as a dosing unit.
  • the reservoir for water is arranged in such a way that the water within the first supply device reaches the distribution device by the effect of gravity.
  • the first feed device has a water non-return valve.
  • the water non-return valve is arranged in the direction of flow after the element for increasing the pressure.
  • the first supply device has a water filter element which is arranged downstream of the water reservoir in the direction of flow.
  • the water filter element is designed as a water filter.
  • the delivery system comprises at least one second delivery device for cleaning agents.
  • the second supply device for cleaning agents has a reservoir for cleaning agents.
  • the reservoir for cleaning agent represents one of the two ends of the second feed device. The direction of flow of the cleaning agent starts from here.
  • the reservoir for cleaning agents preferably has a rinsing device.
  • the second feed device has a cleaning agent delivery unit.
  • the cleaning agent delivery unit conveys the cleaning agent from the reservoir for cleaning agent through the cleaning agent non-return valve via the distributor device into the circulation circuit.
  • the cleaning agent delivery unit is preferably arranged in the flow direction of the cleaning agent.
  • the cleaning agent delivery unit is preferably designed as a pump.
  • the cleaning agent delivery unit is designed as a self-priming pump.
  • the cleaning agent delivery unit is designed as an oscillating piston pump, diaphragm pump or peristaltic pump.
  • the cleaning agent feed pump is located as an immersion unit directly in the connecting element of the second feed device, for example in the hose.
  • the cleaning agent delivery device is designed as a dosing unit.
  • the reservoir for cleaning agent is arranged in such a way that the cleaning agent within the second feed device reaches the distributor device by the effect of gravity.
  • the second supply device has a cleaning agent non-return fitting.
  • the cleaning agent non-return valve is arranged in the direction of flow after the cleaning agent delivery unit.
  • the second supply device has a cleaning agent filter element which is arranged downstream of the cleaning agent reservoir in the flow direction.
  • the cleaning agent filter element is designed as a cleaning agent filter.
  • the delivery system preferably comprises at least a third delivery device for rinse aid.
  • the third supply device for rinsing agent has a reservoir for rinsing agent.
  • the reservoir for rinsing agent represents one of the two ends of the third feed device. The direction of flow of the rinsing agent starts from here.
  • the reservoir for rinsing agent has a rinsing device.
  • the third supply device has a rinse-aid delivery unit.
  • the rinse aid delivery unit directs the rinse aid from the reservoir for rinse aid through the rinse aid non-return valve via the distributor device into the circulation circuit.
  • the rinse aid delivery unit is arranged in the flow direction of the rinse aid.
  • the rinse aid delivery unit is designed as a pump. In a very preferred embodiment, the rinse aid delivery unit is designed as a self-priming pump. In one embodiment, the rinse aid delivery unit is designed as an oscillating piston pump, membrane pump or hose pump. In an alternative embodiment, the rinse aid feed pump is located as an immersion unit directly in the connecting element of the third feed device, for example in the hose. In a further alternative embodiment, the rinse aid delivery device is designed as a dosing unit.
  • the reservoir for rinsing agent is arranged in such a way that the rinsing agent within the third supply device reaches the distribution device by the effect of gravity.
  • the third supply device has a non-return valve for rinse aid.
  • the rinse aid non-return fitting is arranged after the rinse aid delivery unit in the direction of flow.
  • the third supply device has a rinse-aid filter element, which is arranged after the reservoir for rinse-aid in the direction of flow.
  • the rinse aid filter element is designed as a rinse aid filter.
  • the supply system comprises at least a fourth supply device for descaler.
  • the fourth supply device for descaler has a reservoir for descaler.
  • the reservoir for descaler represents one of the two ends of the fourth feed device. The flow direction of the descaler starts from here.
  • the reservoir for descaler has a rinsing device.
  • the fourth feed device has a descaler delivery unit.
  • the descaler delivery unit directs the descaler from the descaler reservoir through the descaler non-return valve via the distribution device into the circulation circuit.
  • the descaler delivery unit is arranged in the flow direction of the descaler.
  • the descaler delivery unit is designed as a pump. In a very preferred embodiment, the descaler delivery unit is designed as a self-priming pump. In one embodiment, the descaler delivery unit is designed as an oscillating piston pump, membrane pump or peristaltic pump. In an alternative embodiment, the descaler feed pump is located as an immersion unit directly in the connecting element of the fourth feed device, for example in the hose. In a further alternative embodiment, the descaler delivery device is designed as a dosing unit.
  • the reservoir for descaler is arranged in such a way that the descaler within the fourth feed device reaches the distributor device by the effect of gravity.
  • the fourth feed device has a descaler non-return valve.
  • the descaler non-return valve is arranged in the direction of flow after the descaler delivery unit.
  • the fourth supply device has a descaler filter element, which is arranged after the reservoir for descaler in the direction of flow.
  • the descaler filter element is designed as a descaler filter.
  • the media introduced into the cleaning system according to the invention are used for cleaning and are either in liquid or solid form. Irrespective of their initial state of aggregation, these media always arrive in the cooking chamber in liquid or gel-like form, with the gel-like form having a low, medium or high viscosity form.
  • the state of aggregation in liquid or gel-like form is referred to below as "liquids in the cooking chamber” for the sake of simplicity.
  • the media properties mentioned below relate to all types of media used, namely cleaning agents, rinse aids and descalers, although this list is not exhaustive. The known properties apply to the properties of water.
  • the media have alkaline, neutral or acidic properties or pH values.
  • the corresponding properties of the components of the cleaning system such as the materials of the reservoirs or the selection of the connecting elements, are advantageously also adapted, designed and selected.
  • the water is in the form of tap water and is used to supply fresh water to the cleaning system according to the invention.
  • the cleaning agent, the rinse aid and/or the descaler is in the form of a liquid.
  • the cleaning agent, the rinsing agent and/or the descaler is designed ready for use.
  • the cleaning agent is highly alkaline.
  • the rinse aid is acidic or neutral.
  • the descaler is acidic.
  • the cleaning agent, the rinse aid and/or the descaler is in the form of a solid.
  • the solid can be designed as a tab, for example.
  • the reservoir or reservoirs which contains the solid, preferably has a rinsing device.
  • Both the reservoir for cleaning agent and the reservoir for rinse aid as well as the reservoir for descaler preferably have such a flushing device.
  • the rinsing device advantageously causes the solid to be dissolved into a liquid or gel-like aggregate state.
  • the flushing device is designed in the same way for all three types of media, for example as a water nozzle.
  • the reservoir or reservoirs containing the solid corresponds to a cartridge and is therefore no longer designed as a tank.
  • the cartridge is flushed out by the flushing device.
  • the solid is dissolved and can be conveyed in liquid form to the distributor device by the corresponding second, third or fourth feed device.
  • the corresponding feed devices have no conveyor units, since these are not required for this purpose.
  • the feed system comprises more than two, three or four feed devices, as a result of which other media required for the cleaning process can advantageously be added.
  • the other supply devices are blocked by the distributor device. This can also be used analogously for other activated feed devices.
  • more than one feed device can be activated at the same time and deliver media in the distribution device.
  • the properties listed below relate to all of the identically designed components of the feed devices (e.g. all reservoirs or all non-return fittings). In each case, only one component or at least one component or all components can have these properties.
  • the reservoirs are internal, ie arranged within the cleaning system.
  • the reservoirs have control devices which are designed as float switches or suction lances.
  • the reservoirs have level sensors.
  • the reservoirs are designed as tanks or containers. In a further embodiment, the reservoirs are designed as adjustable inflow fittings.
  • the reservoir for water can be designed as a faucet or water pipe to which the first feed device of the cleaning system according to the invention can be connected.
  • the non-return fittings are designed as non-return valves. In a further embodiment, the non-return fittings are designed as spring-loaded non-return valves.
  • Particles present in the media are advantageously prevented from entering the circulation circuit by the filter elements.
  • the cleaning system according to the invention has a circulation circuit.
  • the recirculation circuit includes a large number of components. According to the invention, the components of the circulation circuit are fluidically connected to one another by connecting elements.
  • the circulation circuit is not limited to the listed components.
  • all of the components of the circulation circuit are located on a gradient, so that the cooking chamber can advantageously be completely emptied.
  • the circulating circuit comprises at least one connecting device as a component.
  • the connecting device is in contact with a first opening of the cooking chamber.
  • the connecting device is preferably connected to the first opening of the cooking chamber in a material or non-positive manner.
  • the connecting device is designed as an outlet or inlet.
  • the connecting device is fastened in the first opening of the cooking space, for example it is welded to it.
  • the connecting device is designed as a funnel or tube or hose, with the tube or hose being flexible or rigid.
  • the connecting device is a sieve that protrudes into the cooking space.
  • a square profile with a socket connects to the screen vertically downwards and backwards, which in turn is connected to a hose or T-piece, which then leads to the shut-off device.
  • the circulating circuit comprises at least one circulating device as a component.
  • the circulation device ensures the continuous movement of the media in the circulation circuit.
  • the circulating device is designed in such a way that different conveying directions can be implemented.
  • the circulating device is designed as a circulating pump or drain pump.
  • the circulating circuit comprises at least one shut-off element as a component.
  • the shut-off element is designed in such a way that it fluidically connects or separates the connecting device and the return flow.
  • the connection or separation takes place via the outlets of the shut-off element, which are controlled accordingly by the control device.
  • at least two outlets are open, so that the connecting elements connected to them are in fluidic contact with one another.
  • at least one outlet is closed, so that the connecting element connected to it is fluidically separated from the other outlets of the shut-off element and thus from the other connecting elements of the circulation circuit.
  • the shut-off element in the case of a fluidic separation, is designed in such a way that it fluidly connects the connecting device to a drain.
  • a fluidic connection is created between the connecting element that is arranged between the connecting device and the shut-off element and the connecting element that is located between the shut-off element and the drain is arranged, made.
  • the shut-off element is designed as a shut-off valve, preferably as a multi-way valve, ball valve, plug valve, piston valve or cylinder valve. But any other equivalent solution can be used as a shut-off device.
  • this is designed as a 3-way valve or 2-way valve.
  • the shut-off device has an actuator.
  • the shut-off element is electrically driven, for example, by a motor.
  • the actuator of the shut-off device is controlled by the control device.
  • the at least one shut-off element has at least three outlets.
  • the outlets correspond to settings that regulate and control the fluidic connections in the circulation circuit.
  • the outlets of the shut-off element advantageously have a sufficiently large diameter so that they cannot be blocked by particles present in the media.
  • a first outlet is connected to the drain via a connecting element.
  • a second outlet is connected to the connecting device or the circulation device or the distribution device via a connecting element.
  • a third outlet is connected to the circulation device or the distributor device or the return via a connecting element.
  • the at least one shut-off element for fluidically connecting the connecting device to the return is designed in such a way that the second and third outlets are open and the first outlet is closed.
  • the at least one shut-off element for the fluidic separation of the connecting device from the return is designed in such a way that the first and second outlets are open and the third outlet is closed.
  • the at least one shut-off element comprises at least one multi-way valve, which has at least three outlets, or at least two multi-way valves, which each have at least two outlets. In the case of several multi-way valves or other components with the same effect, these are connected in series or in parallel.
  • the circulation circuit comprises at least one return as a component.
  • the return is also referred to as a return pipe and is designed as such.
  • the return pipe is a classic hollow cylinder and has a constant diameter without a narrowing of the cross section (as, for example, in the case of a nozzle).
  • the return is in contact with a second opening of the cooking chamber.
  • the return is preferably connected to the second opening of the cooking chamber in a material or non-positive manner.
  • the return points into the cooking space, preferably in the direction of the ventilation device.
  • the return is designed as fixed tubing, such as a bent metal tube. In a further embodiment, the return is designed as a flexible hose.
  • the return is arranged along the vertical above the connecting device.
  • the second opening of the cooking chamber is also arranged vertically above the first opening.
  • the vertical refers to the position and direction designation, as it is also used in anatomy, namely along the line from the crown to the sole, when viewed from an upright user of the cooking appliance runs out
  • the first opening is arranged in the floor, in the rear wall and in the side walls of the cooking chamber.
  • the second opening is arranged in the ceiling, the rear wall and the side walls of the cooking space.
  • the circulating circuit comprises at least one distributor device as a component.
  • the distribution device is also referred to as the vaccination point.
  • the distribution device corresponds to a mixing and dosing device or transfer point for the media from the feed system into the circulation circuit.
  • the distribution device does not correspond to a container or reservoir for the (temporary) storage of cleaning agent and/or water. Rather, the cleaning agents and/or the water are passed on directly into the circulation circuit by the distribution device without being (temporarily) stored in the distribution device.
  • the distribution device is designed in such a way that even small amounts of liquid can be fed into the circulation circuit.
  • the first, second and third feed device of the feed system each open into the distribution device in the direction of flow.
  • the respective mouth of the corresponding feed device occurs with that end which is arranged on the opposite side to the respective reservoir (and thus the respective first end of the feed device).
  • all feed devices of the feed system end in the flow direction in the distributor device.
  • the distributor device has at least four connections, with three connections or four connections (in the case of a fourth feed device) opening into the respective feed devices and one connection opening into the circulation circuit.
  • the distributor device is designed as a cross distributor or as two T-pieces with a cross distributor.
  • the circulating device, shut-off element and distributor device can be arranged flexibly in the circulating circuit and do not have a preferred position.
  • the drain is designed as a pipe or hose, flexible or rigid.
  • the outflow in the direction of flow of the mixture used is followed by a tank which is connected either to a free outlet in the ground or to a lifting system.
  • the cleaning system according to the invention has a control device with a computer program product.
  • control device is connected to the shut-off element in terms of information technology.
  • control device is connected to all components of the cleaning system according to the invention in order to control them and regulate the cleaning process.
  • all components of the cleaning system according to the invention also have a wired or wireless connection to the control unit.
  • the information technology connection between the control device and the shut-off element is wire-based or wireless.
  • the shut-off element is actuated by the control device in order to regulate the flow streams in the circulation circuit by opening or closing individual outlets of the shut-off element.
  • control device is mounted within the cleaning system on the door of the cooking appliance.
  • the computer program product includes instructions that cause the cleaning system according to the invention to carry out the method steps according to the invention.
  • the computer program product includes the cleaning program. This corresponds to the algorithm to be run, which is individually oriented to the conditions of the cooking chamber.
  • At least some of the components and/or connecting elements are sterile.
  • cooking devices include stoves such as electric stoves, combination cookers and baking ovens, which are designed as in-store baking ovens, deck baking ovens or rack ovens, although the list is not exhaustive.
  • the cooking chamber is also referred to as a treatment chamber, baking chamber or interior.
  • steps a), b) and c) are carried out one after the other in chronological order. In an alternative embodiment, however, the steps can be combined with one another, carried out several times in succession or in a different order, as required.
  • each method step is repeated as often as desired.
  • the repetition includes both the multiple repetition of an individual process step in succession or the repetition of the entire sequence of steps a) to c) or a) and b) or a) and c) or b) and c).
  • cleaning can be adjusted individually depending on the degree of soiling of the cooking chamber.
  • the computer program product of the control device includes instructions which cause at least steps a) to c) to be carried out.
  • the method according to the invention includes cleaning the cooking chamber with cleaning agent and water.
  • the cleaning agent is conveyed from the second feed device by the cleaning agent delivery unit via the distributor device into the circulation circuit. Together with water, a water-cleaning agent mixture is formed, which is conveyed into the cooking chamber through the connecting device. After the cleaning agent has been introduced, the water is fed into the circulation circuit as described in step a). In an alternative embodiment, the water from a previous cleaning stage is already in the circulation circuit.
  • a characteristic fill level is understood to mean a desired fill level in the cooking chamber at which there is a volume sufficient for continuous circulation. In one embodiment, this volume is specified as a value by the control device. Typically, this volume is in the range of 1.5L to 4.5L.
  • the water-cleaning agent mixture is distributed in the cooking chamber by the ventilation device.
  • the used water-cleaning agent mixture flows through the connection device into the drain.
  • the water-cleaning agent mixture used corresponds to dirty water.
  • cleaning step a) is followed by a rinsing step with water as cleaning step b), with water flowing from the first supply device via the distributor device into the circulation circuit until the connecting elements are completely filled, so that further water flowing into the circulation circuit flows through the Return flows to the ventilation device of the cooking chamber and is distributed there.
  • the pre-rinsing is carried out by radial fan steam, in which liquid water flows from a further opening in the cooking chamber directly onto the ventilation device and is distributed by it. After cleaning, the used water flows through the connection device into the drain. The water used corresponds to dirty water.
  • liquid water is directed to a heater outside the cooking chamber in an external steam generator of the cooking appliance, whereby steam is generated.
  • the method according to the invention comprises, as step c), the drying of the cooking chamber, which follows the cleaning and rinsing of the cooking chamber.
  • a heating element in the cooking chamber of the cooking appliance is switched on or off during drying, depending on the deviation between the desired and actual temperature, and the ventilation device is activated.
  • a pre-rinsing of the cooking chamber takes place as a further method step.
  • the pre-rinsing takes place before process step a), the cleaning.
  • the pre-rinse is used to moisten the surfaces of the cooking chamber and thus helps to make the cleaning more effective. In addition, large loose dirt particles are removed.
  • the pre-rinsing takes place with water, with water flowing from the first supply device via the distributor device into the circulation circuit until the connecting elements are completely filled, so that further water flowing into the circulation circuit flows through the return to the ventilation device of the cooking chamber and is distributed there becomes.
  • the pre-rinsing is carried out by radial fan steam, in which liquid water flows from a further opening in the cooking chamber directly onto the ventilation device and is distributed by it.
  • liquid water is directed to a heater outside of the cooking chamber in an external steam generator of the cooking appliance, whereby steam is generated.
  • a further rinsing step with water takes place, which is also referred to as intermediate rinsing and preferably takes place between cleaning step a and cleaning step b).
  • Intermediate rinsing runs in the same way as pre-rinsing.
  • the intermediate rinsing can be carried out after each cleaning stage or as required.
  • the liquid in the cooking chamber is distributed by kinetics, in that excess static pressure is dissipated.
  • the method according to the invention includes rinsing the cooking chamber with rinsing agent and water.
  • the cleaning step of rinsing has the same sequence as step a) of cleaning—except that the rinsing agent is used instead of the cleaning agent.
  • the rinsing preferably follows the cleaning of the cooking chamber with water and cleaning agent.
  • the rinsing agent is conveyed from the third supply device by the rinsing agent delivery unit via the distribution device into the circulation circuit. Together with water, a water-rinse agent mixture forms, which is conveyed through the connecting device into the cooking chamber.
  • the water is routed into the circulation circuit as described in step a).
  • the water from a previous cleaning stage is already in the circulation circuit.
  • the characteristic filling level during rinsing also corresponds to that filling level during cleaning.
  • the water-rinse aid mixture is distributed in the cooking chamber by the injection device.
  • the mixture of water and rinse aid used flows through the connection device into the drain.
  • the water-rinse aid mixture used corresponds to this neutralized rinse water.
  • decalcification is carried out as a further cleaning step.
  • a decalcifier is conveyed from the fourth feed device by the decalcifier delivery unit via the distribution device into the circulation circuit.
  • the descaler can be added as needed, depending on the requirements for cleaning the cooking chamber.
  • a water/decalcifier mixture is formed, which is conveyed into the cooking chamber through the connecting device.
  • the mixture of water and descaler is distributed in the cooking chamber by the injection device.
  • the used water-descaler mixture flows through the connection device into the drain.
  • the at least one shut-off element fluidically connects the connecting device to the circulation device at the beginning and during step a) by activation of the control device.
  • the connecting device acts as an inlet.
  • the at least one shut-off element fluidically separates the connecting device at b) and at the end of step a) from the circulation device by the actuation of the control device.
  • the connecting device acts as a drain.
  • the connecting device has a dual function, namely by acting as an inlet and outlet.
  • the at least one shut-off element fluidically connects the connecting device to the circulation device during pre-flushing and intermediate flushing by activation of the control device.
  • the connecting device acts as an inlet.
  • the cleaning system according to the invention is used to clean the cooking chamber of a cooking appliance. All conceivable embodiments of cooking appliances can be used for the system according to the invention.
  • the method according to the invention is used to clean the cooking chamber of a cooking appliance.
  • the process according to the invention corresponds to a chemical cleaning process.
  • the computer program product which is used to carry out the method, is used to clean the cooking chamber of a cooking appliance.
  • control device on which the computer program product according to the invention is stored is used to clean the cooking chamber of a cooking appliance.
  • the method according to the invention is used to clean the cooking chamber of a cooking appliance.
  • the cleaning system according to the invention does not require any additional ventilation of the circulation line, since the connecting device has a dual function as an outlet and an inlet. The fill level is thus generated via the connecting device.
  • the cleaning system according to the invention advantageously does not require an additional drain valve, since this function is implemented by the shut-off element by opening or closing the outlets.
  • the user e.g. be carried out at longer intervals. Another advantage is that the user no longer comes into contact with the hazardous substances.
  • the cooking appliances can be subsequently upgraded or retrofitted with the cleaning system according to the invention.
  • the cleaning system according to the invention can thus advantageously be installed on all ovens which have at least one ventilation device, a first and second opening and an exhaust air device.
  • the exemplary embodiment relates to a cleaning system for cleaning the cooking chamber of a cooking appliance with a ventilation device and is intended to describe the invention without restricting it.
  • figure 1 shows a schematic sketch of the cleaning system 1 according to the invention with three feed devices (not true to scale).
  • the cleaning device 1 is integrated in a cooking device 2 designed as a baking oven with a cooking chamber 3 .
  • the delivery system of the cleaning system 1 has three delivery devices.
  • the first supply device comprises a reservoir for water 4 designed as a water tank, a water filter element 7 designed as a water filter, an element for increasing the pressure 10 designed as a water inlet valve and a water non-return fitting 11 designed as a spring-loaded water non-return valve
  • a reservoir for cleaning agent 5 designed as a cleaning agent tank
  • a cleaning agent filter element 8 designed as a cleaning agent filter
  • a cleaning agent delivery unit 12 designed as a self-priming cleaning agent pump
  • a cleaning agent non-return fitting 13 designed as a spring-loaded cleaning agent check valve as Rinse aid tank designed reservoir for rinse aid 6, a rinse aid filter element 9 designed as a rinse aid filter, a rinse aid delivery unit 14 designed as a self-priming rinse aid pump and a rinse aid non-return fitting 15 designed as a spring-loaded rinse aid check valve.
  • the distribution device 16 is a component of the circulation circuit.
  • This also includes a connecting device 23 designed as a sieve, to which in the present example a first connecting element 17 designed as a hose is connected, which in turn is connected to a second outlet 26 of the shut-off element 24 designed as a motorized ball valve.
  • the obturator 24 has three outlets. The first outlet 25 of the obturator 24 is connected to a drain (not shown in the figure) via a hose in the direction of flow.
  • the third outlet 27 of the shut-off element 24 is connected to a circulating device 21 embodied as a circulating pump via a second connecting element 18 embodied as a hose.
  • the circulation device 21 is in turn connected to the distributor device 16 via a third connecting element 19 designed as a hose.
  • the distributor device 16 is connected in the circulation circuit via a fourth connecting element 20 embodied as a hose to a return 22 embodied as a return pipe.
  • the return 22 is non-positively connected to a second opening on the side wall of the cooking chamber 3 and points into the cooking chamber 3 to the ventilation device 29 designed as a fan wheel.
  • the cooking chamber 3 also has a heating element 30 designed as a ring heating element, with the heating element 30 and the ventilation device 29 are covered by a hot air baffle 31 in order not to be visible to the user.
  • the connecting device 23 is open for pre-rinsing.
  • the control device (not shown in the figure) regulates that the first outlet 25 and the second outlet 26 of the shut-off element 24 are open and thus fluidly connected to one another and that the third outlet 27 of the shut-off element 24 is blocked and thus fluidly closed. In this setting, any water that occurs in the cooking chamber 3 can flow away in the direction of flow 28 via the connecting device 23 . If the pressure increase element 10 is actuated, tap water flows from the water reservoir 4 via the water filter element 7 through the water non-return valve 11 into the distributor device 16, from where it is distributed in the circulation circuit via the connecting elements 18-20.
  • the connecting elements 18-20 are completely filled with tap water, the excess new tap water flowing in is pressed out through the return 22 in the direction of the ventilation device 29 and injected into the cooking chamber 3. In this way, fresh water is supplied.
  • the connections from the reservoir for cleaning agent 5 and from the reservoir for rinsing agent 6 are shut off by the respective cleaning agent non-return fitting 13 and rinsing agent non-return fitting 15 . Any water that occurs in the cooking chamber 3 flows out via the connecting device 23, which acts as a drain.
  • the connecting device 23 is initially closed.
  • the second outlet 26 and the third outlet 27 of the shut-off element 24 are fluidically connected to one another and the first outlet 25 of the shut-off element 24 is blocked.
  • all liquids injected up to that point remain in the circulation circuit.
  • Cleaning agent from the reservoir for cleaning agent 5 is conveyed through a cleaning agent filter element 8 via a cleaning agent delivery unit 12 and cleaning agent non-return valve 13 into the distributor device 16 and subsequently into the third connecting element 19 .
  • the pre-supplied detergent is then flushed with tap water, which was still in the circulation circuit from the pre-rinse, together via the connecting device 23, which acts here as an inlet, into the cooking chamber 3 through the circulating device 21, so that a level slowly builds up in the cooking chamber 3. If there is sufficient water/cleaning agent mixture, the water/cleaning agent mixture is sucked back into the circulation circuit via the connection device 23 by the circulating device 21 and transported from there via the return 22 and the ventilation device 29 into the cooking chamber 3 .
  • the ventilation device 29 distributes the water/cleaning agent mixture throughout the cooking chamber 3.
  • the circulation is ended by turning off the circulation device 21 and draining the dirty water by actuating the shut-off valve by opening the first outlet 25 and the second outlet 26 and blocking the third outlet 27 .
  • the dirty water flows in the direction of drain 28 from.
  • the connecting device 23 is closed.
  • the second outlet 26 and the third outlet 27 of the shut-off element 24 are fluidly connected to one another and the first outlet 25 of the shut-off element 24 is blocked.
  • the element for increasing the pressure 10 is controlled by the control device.
  • the rinse aid delivery unit 14 is activated and delivers a quantity of rinse aid from the rinse aid reservoir 6 via the rinse aid filter element 9 and the rinse aid non-return valve 15 to the distributor device 16.
  • the element is then in turn switched to pressure increase 10 and the rinse aid, together with the tap water remaining in the circulation circuit from the previous intermediate rinsing, is introduced into the cooking chamber 3 via the connecting elements 17-19 via the connecting device 23, which acts as an inlet.
  • the element for increasing the pressure 10 is de-energized.
  • the circulating device 21 is activated. This sucks in the water-rinse aid mixture and conveys it via the return 22 back to the ventilation device 29 located on the rear wall of the cooking chamber 3.
  • the ventilation device 29 distributes the water-rinse aid mixture throughout the cooking chamber 3.
  • the Circulation ended by turning off the circulating device 21 and draining the neutralized rinsing water by actuating the shut-off valve, by opening the first outlet 25 and the second outlet 26 and blocking the third outlet 27 .
  • the last cleaning step c) includes the drying of the cooking chamber 3.
  • an exhaust air flap (not shown in the figure, is at the back of the oven)
  • the residual liquid on the surface can evaporate and a dry, cleaned and hygienically safe surface remains.
  • the heating element 30 is cycled and the ventilation device 29 is activated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (13)

  1. Système de nettoyage (1) destiné au nettoyage de l'espace de cuisson (3) d'un appareil de cuisson (2) comportant un dispositif de ventilation (29), présentant
    - un système d'alimentation, comprenant
    ∘ au moins un premier dispositif d'alimentation en eau, présentant un réservoir pour de l'eau (4) et, disposés dans le sens d'écoulement de l'eau, un élément permettant d'augmenter la pression (10) et un clapet anti-retour d'eau (11),
    ∘ au moins un deuxième dispositif d'alimentation en produit de nettoyage, présentant un réservoir pour produit de nettoyage (5) et, disposés dans le sens d'écoulement du produit de nettoyage, une unité d'acheminement de produit de nettoyage (12) et un clapet anti-retour de produit de nettoyage (13),
    - un circuit de circulation, lequel comprend comme composants
    ∘ au moins un dispositif de liaison (23) qui est en contact avec une première ouverture de l'espace de cuisson (3) et est conçu comme sortie ou entrée,
    ∘ au moins un tuyau de retour (22) qui est en contact avec une seconde ouverture de l'espace de cuisson (3) et est disposé le long de la verticale au-dessus du dispositif de liaison (23),
    ∘ au moins un dispositif de circulation (21),
    ∘ au moins un organe d'obturation (24) qui est conçu de sorte qu'il relie ou sépare le dispositif de liaison (23) et le tuyau de retour (22) l'un à l'autre ou l'un de l'autre de manière fluidique, l'organe d'obturation (24) étant conçu de sorte qu'il relie le dispositif de liaison (23) à un drain de manière fluidique dans le cas d'une séparation fluidique,
    ∘ au moins un dispositif de distribution (16), qui est conçu en tant que dispositif de mélange et de dosage,
    - au moins un dispositif de commande comportant un produit de programme informatique et connecté à l'organe d'obturation (24) au moyen de la technologie des informations,
    les composants du circuit de circulation étant reliés les uns aux autres de manière fluidique par des éléments de liaison (17, 18, 19, 20), et les premier et deuxième dispositifs d'alimentation du système d'alimentation débouchant dans le dispositif de distribution (16) dans le sens d'écoulement.
  2. Système de nettoyage (1) selon la revendication 1, caractérisé en ce que l'unité d'acheminement de produit de nettoyage (12) est conçue en tant que pompe.
  3. Système de nettoyage (1) selon la revendication 1 ou 2, caractérisé en ce que le réservoir pour produit de nettoyage (5) présente un dispositif de rinçage.
  4. Système de nettoyage (1) selon l'une des revendications 1 à 3, caractérisé en ce que le système d'alimentation comprend en outre au moins un troisième dispositif d'alimentation en produit de rinçage final, présentant un réservoir pour produit de rinçage final (6) et, disposés dans le sens d'écoulement du produit de rinçage final, une unité d'acheminement de produit de rinçage final (14) et un clapet anti-retour de produit de rinçage final (15), le troisième dispositif d'alimentation du système d'alimentation débouchant, conjointement avec le premier et le deuxième dispositifs d'alimentation, dans le dispositif de distribution (16) dans le sens d'écoulement.
  5. Système de nettoyage (1) selon l'une des revendications 1 à 4, caractérisé en ce que l'au moins un organe d'obturation (24) présente au moins trois sorties (25, 26, 27), une première sortie (25) étant reliée au drain par l'intermédiaire d'un élément de liaison, une deuxième sortie (26) étant reliée au dispositif de liaison (23) ou au dispositif de circulation (21) ou au dispositif de distribution (16) par l'intermédiaire d'un élément de liaison (17, 18, 19), et une troisième sortie (27) étant reliée au dispositif de circulation (21) ou au dispositif de distribution (16) ou au tuyau de retour (22) par l'intermédiaire d'un élément de liaison (18, 19, 20).
  6. Système de nettoyage (1) selon la revendication 5, caractérisé en ce que l'au moins un organe d'obturation (24) est conçu pour la liaison fluidique du dispositif de liaison (23) au tuyau de retour (22) de sorte que les deuxième et troisième sorties (26, 27) sont ouvertes et la première sortie (25) est fermée, et est conçu pour la séparation fluidique du dispositif de liaison (23) et du tuyau de retour (22) de sorte que les première et deuxième sorties (25, 26) sont ouvertes et la troisième sortie (27) est fermée.
  7. Appareil de cuisson (2), présentant un système de nettoyage (1) selon l'une des revendications 1 à 6 et un espace de cuisson (3) comportant un dispositif de ventilation (29).
  8. Procédé permettant le nettoyage de l'espace de cuisson (3) d'un appareil de cuisson (2) au moyen d'un système de nettoyage (1) selon l'une des revendications 1 à 6, comprenant au moins les étapes :
    a) de nettoyage avec de l'eau et du produit de nettoyage, le produit de nettoyage étant acheminé depuis le deuxième dispositif d'alimentation dans le circuit de circulation à travers l'unité d'acheminement de produit de nettoyage (8) par l'intermédiaire du dispositif de distribution (16), conjointement avec de l'eau en tant que mélange eau-produit de nettoyage à travers le dispositif de liaison (23) et dans l'espace de cuisson (3), jusqu'à ce qu'un niveau de remplissage caractéristique soit atteint, pour lequel le dispositif de circulation (21) est activé et le mélange eau-produit de nettoyage provenant du dispositif de liaison (23) est acheminé vers le dispositif de ventilation (29) de l'espace de cuisson (3) à travers le tuyau de retour (22) par l'intermédiaire des éléments de liaison (17, 18, 19, 20) du circuit de circulation, où le mélange eau-produit de nettoyage est distribué dans l'espace de cuisson (3) et le mélange eau-produit de nettoyage utilisé s'écoule à travers le dispositif de liaison (23) dans le drain après le nettoyage,
    b) de rinçage avec de l'eau, l'eau s'écoulant du premier dispositif d'alimentation dans le circuit de circulation par l'intermédiaire du dispositif de distribution (16) jusqu'à ce que les éléments de liaison (17, 18, 19, 20) soient complètement remplis d'eau, de sorte que de l'eau supplémentaire s'écoulant dans le circuit de circulation s'écoule à travers le tuyau de retour (22) vers l'appareil d'injection de l'espace de cuisson (3) et y est distribuée, et
    c) de séchage de l'espace de cuisson (3),
    l'au moins un organe d'obturation (24) reliant de manière fluidique le dispositif de liaison (23) au dispositif de circulation (21) au début et pendant l'étape a) en commandant le dispositif de commande comportant un produit de programme informatique, lequel dispositif de commande étant connecté à l'organe d'obturation (24) au moyen de la technologie des informations, le dispositif de liaison (23) agissant comme une entrée, et l'au moins un organe d'obturation (24) séparant de manière fluidique le dispositif de liaison (23) du dispositif de circulation (21) à b) et à la fin de l'étape a) par la commande du dispositif de commande, le dispositif de liaison (23) agissant comme une sortie.
  9. Procédé selon la revendication 8, caractérisé en ce que les étapes de procédé a) et/ou b) et/ou c) sont répétées aussi souvent que souhaité.
  10. Procédé selon la revendication 8 ou 9, comprenant en outre une étape de nettoyage-rinçage final, dans laquelle un produit de rinçage final est acheminé du troisième dispositif d'alimentation dans le circuit de circulation à travers l'unité d'acheminement de produit de rinçage final (14) par l'intermédiaire du dispositif de distribution (16), conjointement avec de l'eau en tant que mélange eau-produit de rinçage final, à travers le dispositif de liaison (23) et dans l'espace de cuisson (3), jusqu'à ce qu'un niveau de remplissage caractéristique soit atteint, pour lequel le dispositif de circulation (21) est activé et le mélange eau-produit de rinçage final est acheminé du dispositif de liaison (23) vers le dispositif de ventilation (29) de l'espace de cuisson (3) à travers le tuyau de retour (22) par l'intermédiaire des éléments de liaison (17, 18, 19, 20) du circuit de circulation, où le mélange eau-produit de rinçage final est distribué dans l'espace de cuisson (3) et le mélange eau-produit de rinçage final utilisé s'écoule à travers le dispositif de liaison (23) dans le drain après le nettoyage.
  11. Procédé selon l'une des revendications 8 à 10, caractérisé en ce que le produit de programme informatique du dispositif de commande comprend des instructions qui provoquent l'exécution d'au moins les étapes a) à c).
  12. Utilisation d'un système de nettoyage (1) selon l'une des revendications 1 à 6 ou d'un procédé selon l'une des revendications 8 à 11 pour le nettoyage de l'espace de cuisson (3) d'un appareil de cuisson (2) tel que défini à la revendication 7.
  13. Utilisation d'un produit de programme informatique ou d'un dispositif de commande, sur lequel le produit de programme informatique est stocké, pour la mise en oeuvre d'un procédé selon l'une des revendications 8 à 11, le produit de programme informatique comprenant des instructions qui provoquent l'exécution d'au moins les étapes a) à c).
EP19187818.0A 2018-07-27 2019-07-23 Système de nettoyage destiné au nettoyage de l'espace de cuisson d'un appareil de cuisson Active EP3599421B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018118289.9A DE102018118289A1 (de) 2018-07-27 2018-07-27 Reinigungssystem für die Reinigung des Garraums eines Gargeräts

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EP3599421A1 EP3599421A1 (fr) 2020-01-29
EP3599421C0 EP3599421C0 (fr) 2023-06-07
EP3599421B1 true EP3599421B1 (fr) 2023-06-07

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EP (1) EP3599421B1 (fr)
DE (1) DE102018118289A1 (fr)
HU (1) HUE062780T2 (fr)
PL (1) PL3599421T3 (fr)

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Publication number Priority date Publication date Assignee Title
DE102022208198A1 (de) 2022-08-05 2024-02-08 Wachtel ABT GmbH Verbesserte Handhabung von Abwasser in einem Gargerät
DE102022126136A1 (de) 2022-10-10 2024-04-11 Rational Aktiengesellschaft Verfahren zum Verhindern von Kondensation innerhalb eines Gargeräts

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223451C2 (de) 1992-07-16 1996-02-22 Eloma Gmbh Gargerät
IT1265578B1 (it) 1993-11-04 1996-11-22 Zanussi Grandi Impianti Spa Forno di cottura dotato di dispositivi perfezionati di pulitura automatica
DE19614439A1 (de) 1996-04-12 1997-10-16 Wiesheu Wiwa Gmbh Ofen und Verfahren zur Reinigung eines Ofenraums
DE19950920C2 (de) 1999-10-21 2003-04-30 Rational Ag Reinigungsvorrichtung für ein Gargerät
ATE208584T1 (de) 2000-03-16 2001-11-15 Eloma Gmbh Grosskuechentechnik Gargerät mit reinigungseinrichtung
DE10017966C2 (de) * 2000-04-12 2003-12-04 Rational Ag Vorrichtung und Verfahren zur Reinigung eines Gargeräteinnenraumes
DE10060204B4 (de) 2000-11-28 2004-04-29 Wiesheu Gmbh Reinigungssystem für einen Ofen und Verfahren zur Ofenreinigung
DE102012203268A1 (de) 2012-02-29 2013-08-29 Miwe Michael Wenz Gmbh Gargerät mit Befüllöffnung zum Einfüllen von Reinigungsflüssigkeit sowie Verfahren zum Befüllen eines Gargerätes mit Reinigungsflüssigkeit
DE102013021732A1 (de) 2013-12-20 2015-07-23 i-clean Technologies GmbH Reinigungskartusche für Reinigungsvorrichtung in Öfen
DE102015103673A1 (de) 2015-03-12 2016-09-15 Rational Ag Gargeräte-Reinigungsmitteltank und Gargerät hiermit
DE102015107488A1 (de) 2015-05-12 2016-11-17 Rational Aktiengesellschaft Reinigungsverfahren für ein Gargerät und Gargerät hierfür
DE102015109019A1 (de) * 2015-06-08 2016-12-08 Budich International Gmbh Reinigungsvorrichtung für gewerbliche Gargeräte

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PL3599421T3 (pl) 2023-12-11
HUE062780T2 (hu) 2023-12-28
EP3599421C0 (fr) 2023-06-07
EP3599421A1 (fr) 2020-01-29

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