EP2148605A1 - Appareil de nettoyage à séchage par micro-ondes - Google Patents

Appareil de nettoyage à séchage par micro-ondes

Info

Publication number
EP2148605A1
EP2148605A1 EP08734698A EP08734698A EP2148605A1 EP 2148605 A1 EP2148605 A1 EP 2148605A1 EP 08734698 A EP08734698 A EP 08734698A EP 08734698 A EP08734698 A EP 08734698A EP 2148605 A1 EP2148605 A1 EP 2148605A1
Authority
EP
European Patent Office
Prior art keywords
cleaning
microwave drying
chamber
cleaned
zone
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.)
Withdrawn
Application number
EP08734698A
Other languages
German (de)
English (en)
Inventor
Bruno Gaus
Thomas NÄGER
Thomas Peukert
Stefan Scheringer
Ingo Wiegand
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.)
Meiko Maschinenbau GmbH and Co KG
Original Assignee
Meiko Maschinenbau GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meiko Maschinenbau GmbH and Co KG filed Critical Meiko Maschinenbau GmbH and Co KG
Publication of EP2148605A1 publication Critical patent/EP2148605A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/485—Drying arrangements by using alternative heat sources, e.g. microwave or infrared
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A47L15/0013—Drying phases, including dripping-off phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A47L15/0015—Washing processes, i.e. machine working principles characterised by phases or operational steps other treatment phases, e.g. steam or sterilizing phase
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4223—Devices for water discharge, e.g. devices to prevent siphoning, non-return valves
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4234—Steam generating arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/04—Steam
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/12—Microwaves

Definitions

  • the invention relates to a cleaning device for cleaning of items to be cleaned in a cleaning zone.
  • cleaning devices are used, for example, in the form of continuous dishwashers or single-chamber dishwashers in dishwashing technology, or in the form of bedpan washers for cleaning items to be cleaned with greater liquid waste in the area of nursing facilities, geriatric care facilities or hospitals.
  • Cleaning devices for cleaning items to be cleaned or items to be washed in numerous different variations are known from the prior art.
  • the design of these cleaning devices depends on various boundary conditions, such as the type of items to be cleaned, the dirt, the throughput or similar conditions.
  • dishwashers are known as household appliances and as commercial dishwashers for use, for example, in canteens, hospitals, schools, government canteens or similar lent institutions with commercial kitchens.
  • Commercial dishwashers are subdivided into continuous dishwashers in which the items to be washed (eg cups, plates, cutlery, glasses, trays or similar items to be washed) successively pass through several cleaning zones.
  • a continuous dishwashing machine can have a pre-evacuation zone, a washing zone a rinse-off zone and a drying zone. Dishwashers with less cleaning zones are known.
  • Continuous dishwashers are designed in the art, for example, as a belt transport or basket transport machines.
  • Single-chamber dishwashers usually have a single washing chamber as a cleaning zone, in which in turn cleaning material, for example in the form of cups, plates, glasses, cutlery, crockery or trays can be cleaned.
  • household single-chamber dishwashers are operated in a water change mode, ie one and the same tank is usually used for a wash program and a post-wash step, with an exchange of the water or cleaning liquid in the tank between these steps.
  • single-chamber dishwashers are used for commercial use, which have a rinse tank next to a wash tank, such as a boiler. In this final rinse tank, rinse liquid (for example water with a rinse aid additive) can be heated to a rinse-off temperature, while the actual washing process takes place in the rinse chamber.
  • rinse liquid for example water with a rinse aid additive
  • cleaning devices which are suitable for the cleaning of medical device and / or care device.
  • it may be cleaning goods, in which incurred large amounts of liquid waste and / or solid waste, which must be disposed of.
  • cleaning appliances are referred to below as “bedpan washers” without restricting the items to be cleaned to a specific care appliance.
  • This sanitization can range from simple germ reduction via disinfection (for example, disinfection with chemical disinfectants and / or thermal disinfection with steam or another type of heat application) to complete sterilization of the cleansing material.
  • disinfection for example, disinfection with chemical disinfectants and / or thermal disinfection with steam or another type of heat application
  • drying of the cleaning material is essential.
  • continuous dishwashers for example, in many cases one or more drying zones adjoin one or more cleaning zones, in which heat is applied in the form of hot air to the items to be washed.
  • a drying step with a heat treatment is also indispensable in many cases, since moisture remaining on the items to be cleaned can easily lead to re-contamination of the items to be cleaned.
  • the drying of the items to be cleaned represents a considerable constructional challenge.
  • the energy consumption of hot air blowers for drying in continuous dishwashing machines is in many cases a few kilowatts, for example 6 kW, which accounts for one quarter of the total energy consumption of the dishwasher or more, similar problems arise with other types of dishwashers or plug-in dishwashers.
  • the requirements of the drying effect in many cases a greatly increased energy consumption, often a large part of this energy escapes unused from the cleaning equipment.
  • a cleaning device for cleaning items to be cleaned which has at least one cleaning zone for cleaning the items to be cleaned with a cleaning liquid.
  • the cleaning device may correspond to a known cleaning device according to the above description of the prior art and may, for example, a continuous dishwashing machine, a single-chamber dishwasher (especially for commercial use) and / or a slot washer.
  • a basic idea of the present invention is to circumvent or reduce the problem of the previously known drying devices of conventional cleaning devices by transferring the principle of micro wave drying to the described cleaning devices.
  • the principle of microwave drying is known from various other fields of technology, for example in construction, where microwave drying is used, for example, for drying damp walls.
  • Other fields of use are, for example, paint production and coating technology, in which microwave processes are used for drying the coatings (see, for example, EP 1327844 A2).
  • This microwave drying device can comprise, for example, one or more microwave sources.
  • a microwave source may comprise a magnetron.
  • other types of microwave sources are known which can be used alternatively or additionally.
  • the microwave drying device may further comprise at least one waveguide.
  • This waveguide can in particular be used to direct the microwaves from the microwave source to a housing, for example an interior of the cleaning zone (eg an interior of a rinsing chamber).
  • the at least one waveguide can also be used to align the microwaves with the items to be cleaned, for example by having this waveguide an opening aligned with the item to be cleaned.
  • An opening of the waveguide in the interior of the cleaning zone may have a closable opening, for example an opening flap.
  • this opening flap can be configured such that it prevents cleaning liquid from entering the waveguide and / or into the waveguide the microwave source penetrates.
  • this may be provided as an opening flap, a spring-loaded opening flap, which is automatically opened by a fan of the microwave drying device.
  • An automatically (eg electromechanically) openable valve can also be provided at the opening.
  • the microwave drying device can also be set up to apply hot air to the items to be cleaned.
  • the waveguide described above can be used to direct hot air to the items to be cleaned.
  • the microwave drying device has a blower, which is used to generate the hot air.
  • a microwave source itself can be used, as this usually produces waste heat.
  • a cooling fan of the microwave drying device can be used, which initially directs air to the microwave source, wherein the air is heated there to then apply this air to the items to be washed or cleaned. In this way, the microwave drying effect is additionally supported by heated room air or heated clean air, without the need for a separate fan with a device for heating the air. This saves a lot of energy.
  • microwaves are understood to mean frequencies between 0.3 and 300 GHz, which can be applied to the items to be cleaned in continuous wave mode or in pulsed mode, where the microwave drying device can be set up with microwaves at a frequency or The microwell drying device can be set up to apply microwaves having at least two frequencies, and it is particularly advantageous if the microwave radiation is chosen such that it does not or only slightly depends on the materials of the cleaning device, for example from the chamber walls of a cleaning zone and / or rinsing chamber This is easily possible today with modern microwave sources, for example the magnetron described above suitable materials, for example transparent (i.e. not or only slightly absorbing) for the microwave radiation used, so do not heat up significantly.
  • a cleaning device can be produced whose drying proceeds considerably faster than with conventional cleaning devices and which is considerably cheaper in terms of energy consumption than known cleaning devices. Since the items to be washed usually have only small areas, the drying energy can be applied in a more targeted manner to the surfaces to be dried via the microwave irradiation, so that the energy efficiency can be significantly improved compared to the usual fan methods.
  • the microwave drying device can be set up to emit microwaves having at least one frequency or in a frequency band which is completely or partially absorbed by the cleaning liquid adhering to the items to be cleaned.
  • the frequencies of about 2.5 GHz commonly used for water may be used.
  • other frequencies are possible, for example, frequencies in the range of about 850 MHz or 3.87 GHz.
  • Frequency modulations are also possible, as described for example in EP 1327844 A2.
  • microwave radiation having a frequency band or a frequency which is at least partially absorbed by the material to be cleaned.
  • ceramics or porcelain can be specifically influenced with microwave radiation.
  • the cleaning material can be heated selectively, so that the adhering cleaning liquid evaporates.
  • the nature of the items to be cleaned can be predetermined by a user, for example by a selection from a list of possible types of items to be cleaned. Since usually the types of cleaning are limited in particular in commercial use in a few ways, such a list is easily possible.
  • a user can programmatically select from a list one or more types of items to be cleaned, after which one or more corresponding microwave frequency bands are preferably automatically selected (eg by a controller, in particular a computer) and the microwave drying is carried out with this or these frequencies becomes.
  • microwave radiation can also be used, which is concentrated in a frequency band, preferably a narrow frequency band.
  • the microwave drying device or the cleaning device is set up such that the frequency band can be varied over time.
  • the frequency band can be tuned, for example, such that it successively covers different frequency ranges.
  • a narrow band effect can be achieved, which is shifted in time. This will give a higher energy density achieved as with a broadband radiation, which can cause a higher efficiency of drying.
  • the cleaning device may further comprise at least one temperature sensor for detecting the temperature of the ware.
  • This at least one temperature sensor may, for example, be connected to a control or regulating device (for example a central control of the cleaning device), which controls the microwave drying device accordingly. In this way, the greatest possible efficiency of the drying can be achieved and / or overheating of the cleaning material can be avoided.
  • the at least one temperature sensor may include, for example, a temperature sensor applied to the cleaning device.
  • the temperature sensor may also have an infrared sensor, which can detect a temperature (for example within a temperature range between 0 0 C and 250 0 C) of the items to be washed via infrared radiation.
  • other types of temperature sensors are possible.
  • the cleaning device can in particular comprise a conveyor dishwasher or be a continuous dishwasher.
  • the cleaning zone is preferably designed such that it comprises at least one final rinse zone.
  • the microwave drying device is preferably arranged in a passage direction behind the rinse zone. This ensures that the drying is followed (preferably immediately) by the rinsing process in the final-rinse zone.
  • a drying zone in which the microwave drying device is arranged can follow the rinsing zone.
  • the microwave drying device comprises at least one fan, which is used to support the microwave drying.
  • it can be a fan which cools a magnetron, after which the cooling air flow is subsequently directed to the cleaning material.
  • the microwave drying device can be set up to produce an air flow directed essentially perpendicular to a direction of passage of the dishwasher by means of the blower.
  • the dishwasher further comprises at least one heat recovery device.
  • This heat recovery device can be arranged in particular to at least part of the Airflow contained in the heat to recover.
  • This heat can then be recycled to the continuous dishwashing machine.
  • This heat recirculation can take place, for example, by virtue of the fact that the heat recovery device comprises one or more heat exchangers, wherein the heat exchanger liquid of this heat exchanger is subsequently returned to a tank (for example a wash tank or a post-rinse tank) of the continuous dishwashing machine. In this way, heating power can be saved in this tank.
  • the continuous dishwasher may also have at least one vapor deposition device.
  • This vapor deposition device can be used to completely or partially recover moisture which is contained in the air flow generated by the fan after drying or contacting of the cleaning material. This moisture can be condensed, for example, whereby the condensate, which still has an elevated temperature, can be returned to a tank of the dishwasher, for example, and then used again (for example after slight further heating) for cleaning or rinsing. In this way, the energy efficiency of the continuous dishwashing machine can be significantly increased.
  • the vapor deposition device may comprise, for example, one or more cooling surfaces and / or cooling plates, at which condensation may occur.
  • the cooling surfaces can be made purely passive or can also be actively cooled by a cooling liquid. In this way, for example, the idea of the heat recovery device can be combined with the idea of the vapor deposition device, since in both cases a heat exchanger can be used.
  • the cleaning appliance may also comprise or be a single-chamber dishwasher, as described above.
  • this single-chamber dishwasher can be a commercial single-chamber dishwasher, a single-chamber dishwasher which preferably has a separate, in particular a separately heatable, rinse tank, preferably a boiler, in addition to a wash tank.
  • the cleaning zone of the cleaning device can accordingly comprise a rinsing chamber of the single-chamber dishwasher.
  • the single-chamber dishwasher may be configured to perform a cleaning program. It is particularly preferred if the cleaning program has at least one cleaning program step, wherein in the at least one cleaning program step, the cleaning material with the cleaning liquid is cleaned.
  • a cleaning liquid which has water can be used as the cleaning liquid.
  • additives may be provided, such as detergent or other cleaning fluids.
  • a Vietnamese Vietnamese be provided, in which the cleaning material is rinsed with a Vietnamese Pattersonkeit (for example, water or water with a rinse aid), preferably, the cleaning program also has a cleaning program step temporally downstream drying step, in which the cleaning material dried at least partially with the microwave drying device becomes.
  • the microwave drying device is set up to produce a substantially upward air flow by means of the blower. This air stream can act on the cleaning material received in the rinsing chamber or flow around and absorb moisture in this way.
  • the Einschgeschirr Wegmaschine has at least one hot air outlet for removing the air flow from the washing chamber.
  • This hot air outlet can be designed, for example, as a simple opening, for example an opening in the upper area (eg in the ceiling area and / or in the wall area in the vicinity of a rinsing chamber ceiling).
  • the hot air outlet can also lead to a drain of the dishwasher. In this way it is prevented that moist air from the washing chamber enters the environment and there worsens the working conditions of the operating staff. Especially in commercial kitchens, this development of the invention makes advantageous noticeable.
  • the process has at least one siphon, in which a water supply can be included as an odor trap.
  • the hot air outlet can then flow into the drain, bypassing this siphon bend or the water supply in this siphon bend.
  • the hot air outlet can be equipped with a corresponding valve, for example a self-blocking valve, eg a non-return valve.
  • the hot air outlet also continue to have at least one heat recovery device.
  • this heat recovery device may in turn comprise a heat exchanger, wherein the ideas described above can be applied analogously.
  • heat exchanger liquid can be returned to a tank of the single-chamber dishwashing machine, so that discharged heat of drying can be used wholly or partly for heating cleaning liquid (rinsing liquid and / or rinsing liquid).
  • the single-chamber dishwasher can in turn also have a vapor deposition device.
  • this vapor-precipitating device may also comprise one or more cooling surfaces to which moist air condenses completely or partially, wherein preferably the condensate is subsequently cleaned (rinsing and / or rinsing) due to its elevated temperature Cleaning good can be used.
  • the cleaning device may also include a bedpan washer according to the definition described above or be such a bedpan washer.
  • the bedpan washer should be usable in particular for cleaning of items to be cleaned, in which larger amounts of liquid waste and / or solid waste, for example several 10 ml up to a few liters of liquid waste, may be incurred.
  • the bedpan washer is designed for cleaning of medical device or care device.
  • the bedpan washer can be designed as described in DE 10348344 A1.
  • the cleaning zone of the bedpan washer includes a rinsing chamber.
  • the bedpan washer should be set up to apply cleaning fluid to the cleaning fluid in this wash chamber.
  • further cleaning processes can take place in the rinsing chamber, for example an automatic emptying of the items to be cleaned that precedes the cleaning.
  • the bedpan washer again have a flow in which the cleaning material can be emptied. Again, this may be a drain with a siphon bow that can hold a supply of water that acts as an odor trap.
  • a microwave drying device which is set up to at least partially dry the items to be cleaned in the rinsing chamber.
  • the cleaning device or bedpan washer can be set up to Perform cleaning program.
  • at least one cleaning program step may be provided, in which the items to be cleaned are cleaned with the cleaning liquid.
  • the cleaning program can furthermore comprise at least one drying step arranged chronologically downstream of the cleaning program step, in which the cleaning material is dried at least partially with the microwave drying device.
  • a central control can be provided which controls the operation of the cleaning appliance.
  • the time sequence of the control of the microwave drying device can be taken over by this control.
  • the microwave power, a pulse duration and / or a continuous operation, a frequency band or similar parameters of the microwave drying device can be controlled.
  • the controller may be configured such that the microwave drying device or the microwave source is switched on only in the drying step.
  • the bedpan washer may include a steam generating device.
  • This steam generating device can for example also be configured again as described in DE 10348344 Al.
  • the bedpan washer can be set up in this case to sanitize the items to be cleaned by means of steam.
  • sanitizing is meant a specific or nonspecific germ reduction, which can range from disinfection to disinfection or, depending on steam conditions, even to almost complete sterilization, in which case the cleaning program can be designed, for example
  • steam may be introduced into the rinsing chamber through one or more nozzles, after which, for a given exposure time, this vapor is to be scavenged by the rinsing chamber sanitized or disinfected.
  • the cleaning device in turn be set up in the case of the bedpan flushing such that a blower of the microwave drying device is used to support the drying.
  • the bedpan washer may have an outflow with a siphon bend, wherein the bedpan washer further comprises an outgoing from the rinsing chamber bypassing the siphon bend (or a recorded in the siphon water reservoir) in the outflow exhaust duct.
  • the blower can be set up to to displace moist air from the rinsing chamber (ie air from the airflow generated by the blower) into the drain.
  • a microwave drying step can be carried out, in which moisture is discharged into the drain.
  • the exhaust air line can have a self-locking valve, preferably a non-return valve, in order to prevent contaminated air from the drain from returning to the rinsing chamber where it re-germinates the ware.
  • a method is also proposed. This method may include all or some of the method steps already partially described above.
  • the method is used for cleaning of items to be cleaned in a cleaning device, for example a cleaning device in one of the embodiments described above.
  • the cleaning material is cleaned in at least one cleaning zone of the cleaning device with a cleaning fluid.
  • the cleaning material is at least partially dried by means of a microwave drying device.
  • FIG. 1 shows an embodiment of a continuous dishwasher according to the invention
  • FIG. 2 shows an embodiment of a Einziggeschirr Whymaschine invention
  • FIG. 3 shows an exemplary embodiment of a bedpan washer according to the invention.
  • FIG. 1 shows a first embodiment of a cleaning device is shown in a schematic sectional view from the side.
  • the cleaning device is configured as a continuous dishwashing machine 110.
  • cleaning material 112 is transported in a passage direction 114 or transport direction through treatment zones or cleaning zones of the throughflow dishwasher 110.
  • a conveying device 116 which in the illustration according to FIG. 1 is designed as an endless conveyor belt, transports the material 112 to be cleaned through the various cleaning zones of the continuous dishwashing machine 110.
  • this first passes through a rinsing zone 118.
  • a first rinsing system 120 Within the rinsing zone 118 there is a first rinsing system 120 and a second rinsing system 122.
  • Cleaning fluid 123 exits therefrom in jet form.
  • the first flushing system 120 and the second flushing system 122 are acted upon by a first pump 124 with cleaning fluid.
  • the first pump 124 is housed within a purge tank 126 associated with the purge zone 118. In the upper region of the first pump 124 is a pump housing 128.
  • the Spülzonentank 126 is covered by a Tankabdecksiebes 130.
  • the rinse zone tank 126 associated with the rinse zone 118 contains a heated or unheated water supply.
  • the rinsing zone 118 is separated from the subsequent pump rinsing zone 134 by means of a separating curtain 132, as seen in the transporting direction 114 of the material 112 to be cleaned.
  • the rinse tank 126 is separated from the tank via a partition wall 136, which is located below the pump rinsing zone 134 or a fresh water rinsing zone 138 adjoining the pump rinsing zone 134.
  • the product 112 to be cleaned leaving the rinsing zone 118 runs into the pump rinsing zone 134 after passage of the separating curtain 132.
  • the pump rinsing zone 134 is fed via a second pump 140.
  • the cleaning fluid 123 emerging in the pump rinsing zone 134 from a first spray tube 142 and a second spray tube 144 wets the product 112 to be cleaned from the top side and the bottom side.
  • the spray pipes 142, 144 arranged in the pump rinsing zone 134 are received on a curved pipe, so that an offset of the first spray pipe 142 is achieved in comparison with the second spray pipe 144 of the pump rinsing zone 134.
  • the fresh water rinse zone 138 includes an upper spray tube 146 and a lower spray tube 148.
  • the two spray tubes 146, 148 are arranged according to the Sprührohrverlaufes 150 seen in the transport direction 114 of the material to be cleaned 112 also offset from one another.
  • the fresh water volume emerging from the upper spray tube 146 and the lower spray tube 148 wets the cleansing product 112 from its top and bottom with a fresh water jet 152.
  • the fresh water rinse zone 138 is followed by a drying zone 154.
  • This drying zone 154 may, for example, be separated from the fresh water rinsing zone 138 by another curtain (not shown in FIG. 1).
  • the drying zone 154 is divided into two parts.
  • a heat recovery device 156 is arranged in the drying zone 154.
  • This heat recovery device 156 comprises an exhaust fan 158, by means of which exhaust air is withdrawn from the continuous dishwashing machine 110.
  • the heat recovery device 156 may comprise a heat exchanger, via which heat exchanger liquid is warmed up, in order subsequently to be used, for example, in the rinse tank 126. In this way, the dissipated heat is at least partially reused, so that the energy requirement for a tank heating of the rinsing zone tank 126 can be reduced.
  • the heat recovery device 156 may also include a Kondensatniederschlags observed (not shown) to at least partially condense moist air.
  • a microwave drying device 160 is provided in the region of the heat recovery device 156.
  • a microwave drying device 160 is shown, whereby, of course, a plurality of such devices may be provided, for example, to apply microwaves to the product 112 to be cleaned from several sides.
  • the microwave drying device 160 in this embodiment comprises a fan 162, which cools a magnetron 164.
  • the dimensioning of the blower 162 in Figure 1 is indicated only schematically.
  • the magnetron 164 includes an anode 166 as a transmitter antenna. This anode 166 protrudes into a waveguide 168, in which microwave radiation 172, the magnetron 164 is generated, is coupled.
  • the waveguide 168 is dimensioned accordingly and may for example have a square or rectangular cross-section. In the exemplary embodiment in FIG. 1, the waveguide 168 has a substantially upwardly directed, vertical course and is coupled to a housing bottom 170 of the through-flow dishwasher 110 below the conveying device 116.
  • the microwave drying device 116 or the magnetron 164 are designed to generate microwave radiation 172 and to apply it via the waveguide 168 to the cleaning material 112 when it is in the region of the mouth of the waveguide 168 in the drying zone 154. Sensors may be provided which detect whether cleaning material 112 is located above this orifice, so that microwave radiation 172 is preferably generated only in this case. Alternatively or additionally, the anode 166 can also be used as a detector in order to detect whether cleaning material 112 is present, as is also proposed, for example, in EP 1327844 A2. In this way energy can be saved by avoiding unnecessary microwave radiation.
  • the microwave radiation 172 may be configured according to one of the embodiments described above, for example with a frequency in the range of 2.5 GHz.
  • the conveying device 116 and optionally a basket or another receiving device for receiving the cleaning product 112 are configured substantially transparent to the irradiated microwave radiation 172, for example by appropriate design of the materials.
  • the mouth of the waveguide 168 is essentially open into the interior of the drying zone 154.
  • flaps, valves, curves, microwave-transparent roofs or other embodiments may be provided which allow indeed a loading of the cleaning material 112 with microwave radiation 172, but prevent dripping of the cleaning material 112 water or other cleaning fluid through the waveguide 168 to the magnetron 164 device and this damaged.
  • a temperature sensor 174 may be provided in the region of the mouth of the waveguide 168 in the drying zone 154.
  • the signals of this temperature sensor 174 can be transmitted, for example, to a central controller 176, which is indicated only schematically in FIG. 1, and which can drive, for example, the magnetron 164.
  • the blower 162 of the microwave drying device 160 generates an air flow 168 directed upward in FIG. 1. Since the magnetron 164 generates heat, which is generated by the Air flow 178 is added, this heated air flow 178 additionally supports the drying effect of the cleaning material 112. The heated air flow 178 rises to the heat recovery device 168, where the heat of this air flow 178 is partially recovered.
  • a blower zone 180 adjoins the area to which the heat recovery device 156 and the microwave drying device 160 are accommodated.
  • a drying fan 182 is accommodated. From the drying fan 182 exiting heated air is inflated via outlet nozzles 184 on top of the material 112 to be cleaned. Due to the microwave radiation 172 and the drying effect of the microwave drying device 160, however, the drying fan 182 can ideally be completely dispensed with, or this drying fan 182 can be considerably reduced in terms of its dimensioning. In this way, a considerable amount of energy can be saved.
  • the drying zone 154 is shielded by a further separation curtain 186 against a discharge path 188.
  • the dried and partially cooled goods 112 which have now been cleaned, can be removed from the conveyor 116 designed as a conveyor belt.
  • FIG. 2 shows a second exemplary embodiment of a cleaning appliance for cleaning items 112.
  • the cleaning device is a single-chamber dishwasher 210.
  • the single-chamber dishwasher 210 comprises a rinsing chamber 212 with a spray nozzle system 214 received therein and with corresponding devices, not shown in FIG. 2, for conveying cleaning liquid to this spray nozzle system 214 Way, the cleaning material 112, which is received in a corresponding basket 216, from a tank 218 in the bottom region of the washing chamber 212 are subjected to rinsing liquid.
  • the rinsing chamber 212 is accessible through a front flap 220 and can be loaded with items 112 to be cleaned. Waste water from the tank 218 can be pumped via a drain pump 222 into a drain 224.
  • the drain 224 includes a siphon bend 226 with a stored water supply as an odor barrier.
  • the single-chamber dishwasher 210 has a hot air outlet 228, which connects the interior of the rinsing chamber 212 to the outlet 224, bypassing the siphon bend 226. In the warm air outlet 228, a blower 230 and a check valve 232 are accommodated. Moreover the hot air outlet 228 has a heat recovery device in the form of heat exchange 234, which is indicated only symbolically in FIG.
  • this heat exchange 234 By means of this heat exchange 234, the warm exhaust air which is sucked out of the rinsing chamber 212, heat can be at least partially withdrawn.
  • the heat exchanger liquid can then be supplied to the tank 218, for example, so that energy can be saved.
  • an air inlet 236 is provided below the front flap 220 of the rinsing chamber 212 in the form of a gap, through which a pressure equalization in the rinsing chamber 212 can take place.
  • This air inlet 236, such as the hot air outlet 228, is optional components.
  • the single-chamber dishwasher according to the invention could also be realized without these components.
  • the single-chamber dishwasher 210 has a microwave drying device 160.
  • This microwave drying device 160 again comprises, as in the exemplary embodiment in FIG. 1, a fan 162, a microwave source (again in the form of a magnetron 164 with a magnetron anode 166 and a hollow conductor 168 leading into the interior of the dishwashing chamber 212.
  • the microwave drying device 160 is shown only schematically in FIG. 2 and may, for example, also comprise a plurality of microwave sources and a plurality of waveguides 168.
  • the microwave drying device 160 is equipped such that it generates an upward-directed air flow 178 via its fan 162.
  • This air flow 178 supports the drying of the cleaning material 112 after carrying out a cleaning of the cleaning material 112 with cleaning fluid.
  • the air flow can then be sucked into the outlet 224 via the blower 230.
  • Due to the air inlet through the fan 162 of the microwave drying device 160 can optionally be dispensed with the air inlet gap 236 when the two fans 162 and 230 are adjusted to each other accordingly.
  • the waveguide 168 of the microwave drying device 160 has an upwardly directed curvature at its end projecting into the rinsing chamber 212.
  • the waveguide 168 is configured such that cleaning liquid can not pass through the waveguide 168 to the magnetron 164.
  • the waveguide 168 for example, in the region of the curvature corresponding slots or other openings have as a drain.
  • the waveguide 168 may have a valve at its end or in its interior. This valve is shown symbolically in FIG. 2 in the form of a flap 238. provides.
  • the air flow generated by the blower 162 may be sufficient to open this flap 238, so that microwave radiation 172 can pass unhindered onto the cleaning material 112.
  • Other forms of liquid repellency eg microwave transparent, water repellent surfaces
  • microwave transparent, water repellent surfaces are conceivable, as already described above.
  • a temperature sensor 174 in the interior of the washing chamber 212 by means of which the microwave drying can be monitored.
  • a controller 176 is provided, which can be supplied, for example, with signals from the temperature sensor 174 and which can control the program sequence.
  • FIG. 3 shows a third embodiment of a cleaning device according to the present invention.
  • the cleaning device does not comprise a dishwasher but a bedpan washer 310.
  • this bedpan washer 310 For details of a possible embodiment of this bedpan washer 310, reference may be made by way of example to the design described in DE 10348344 A1.
  • the bedpan washer 310 comprises a rinsing chamber 212 with a front flap 220.
  • cleaning material 112 holder and items to be cleaned are not shown in FIG. 3
  • the bedpan washer 310 may be configured such that when the front door 220 is closed, the items to be washed are automatically emptied. In this way, liquid or solid waste from the items to be washed can be emptied into a drain 224 of the sink washer 310. In this way it is ensured that the bedpan washer 310 is suitable for the cleaning of cleaning material 112 with an attack of larger amounts of liquid.
  • the bedpan washer 310 differs, for example, from autoclaves, which are used for the sterilization of medical instruments. Even in an autoclave as a cleaning device, however, the microwave drying according to the invention can be used.
  • the items to be washed can be acted upon by a system of nozzles 312 with cleaning liquid from a water / steam unit 314.
  • This water / steam unit 314 is connected via a piping system 316 to the nozzles 312 (where the nozzles 312 may be simple orifices and / or more complex spray nozzles).
  • a pump 318 and a check valve 320 are further included.
  • the water / steam unit 314 is fed via a fresh water inlet 322 with fresh water.
  • the water / steam unit 314 comprises a steam generator 324 with a heater 326, so that the items to be cleaned inside the rinsing chamber 212 via the piping system 316 and the nozzles 312 can be acted upon with steam.
  • a conventional cleaning process can thus, for example, after emptying the cleaning material 112, provide for cleaning with cleaning liquid (eg hot and / or cold water, if appropriate in each case with additives), which is followed by a steam disinfection step.
  • cleaning liquid eg hot and / or cold water, if appropriate in each case with additives
  • the draft basin rinse 310 comprises a feed line 328 with a check valve 330, which opens into the rinsing chamber 212.
  • the supply line 328 may for example be connected to a fresh air blower (not shown) and may be used to displace steam via a waste air line 332 bypassing the siphon bend 226 into the drain 224 after a steam disinfection step.
  • a self-locking valve in the form of a check valve 334 is added.
  • the items to be cleaned can be cooled and already partly dried, and the steam can be at least partially displaced from the rinsing chamber 212 into the outlet 224 so that the working environment is only slightly loaded when the front panel 220 is opened.
  • the supply line 328 and the exhaust air line 332 are each optional components and that the bedpan washer 310 could also be implemented without these components or only with one of these components.
  • the bedpan washer 310 again comprises a microwave drying device 160.
  • This microwave drying device 160 is configured, for example, analogously to the microwave drying devices 160 according to the aforementioned exemplary embodiments, so that reference can be made to the above descriptions.
  • the microwave drying device 160 comprises a waveguide 168, which opens into the washing chamber 212 and through which the cleaning material 112 can be acted upon by microwave radiation 172.
  • the microwave drying device 160 preferably has a self-locking valve at the mouth of the waveguide 168 in the rinsing chamber 212, which, for example, may again be configured in the form of a flap 238.
  • This flap 238 not only prevents moisture from entering the waveguide 168, but may also cause the flushing chamber 212 to leak when the vapor from the flushing chamber 212 is displaced.
  • the flap 238 may be closed by a slight overpressure in the rinsing chamber 212, so that moist exhaust air and steam via the exhaust duct 332 can be displaced into the outlet 224, wherein the flap 238 at least largely prevents this moist air and this steam from being displaced towards the microwave source or the magnetron 164.
  • the check valve 334 prevents recontamination of the interior of the rinsing chamber 212 and the washware 112 received therein.
  • the microwave drying device 160 can be started (again, for example, via a controller 176 which controls the program sequence accordingly). , so that the dishes 112 are supplied with microwave radiation 172.
  • an air flow can be generated by the blower 162 of the microwave drying device 160 in the interior of the rinsing chamber 212, which supports the drying of the cleaning material 112.
  • a discharge of excess pressure, which is generated by the blower 162 of the microwave drying device 160, can take place via the exhaust air line 332 into the outlet 224.
  • a program sequence could include the following steps: emptying the items to be drained into the drain 224, one or more cleaning steps with cleaning liquid (eg hot and / or cold water, if appropriate with additives), a steam disinfection step (optional) , a vapor displacement step by fresh air (optional), and one or more microwave drying steps. Individual program steps are also repeatedly carried out, and the order shown is preferred, but not mandatory.
  • a further advantage of microwave drying is that, in the exemplary embodiment shown in FIG.
  • a cleaning device can also support a disinfection process, for example into microwave radiation 172 (eg by appropriate selection of a frequency range), that this one germicidal activity unfolds.
  • the microwave drying can in turn be monitored via a temperature sensor 174, which in turn is symbolically indicated in FIG. 3, and controlled by the controller 176, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un appareil de nettoyage (110; 210; 310) destiné au nettoyage d'articles à nettoyer (112). L'appareil de nettoyage (110; 210; 310) comprend au moins une zone de nettoyage (118, 134, 138; 212) destinée au nettoyage des articles à nettoyer (112) à l'aide d'un liquide de nettoyage. L'appareil de nettoyage (110; 210; 310) présente également un dispositif de séchage par micro-ondes (160), qui peut être utilisé pour sécher au moins partiellement les articles à nettoyer (112).
EP08734698A 2007-05-30 2008-03-20 Appareil de nettoyage à séchage par micro-ondes Withdrawn EP2148605A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007025262A DE102007025262A1 (de) 2007-05-30 2007-05-30 Reinigungsgerät mit Mikrowellentrocknung
PCT/EP2008/002263 WO2008145214A1 (fr) 2007-05-30 2008-03-20 Appareil de nettoyage à séchage par micro-ondes

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EP2148605A1 true EP2148605A1 (fr) 2010-02-03

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US (1) US20100139690A1 (fr)
EP (1) EP2148605A1 (fr)
JP (1) JP2010527775A (fr)
CN (1) CN101686788A (fr)
DE (1) DE102007025262A1 (fr)
WO (1) WO2008145214A1 (fr)

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US20100139690A1 (en) 2010-06-10
CN101686788A (zh) 2010-03-31
JP2010527775A (ja) 2010-08-19
DE102007025262A1 (de) 2007-10-25
WO2008145214A1 (fr) 2008-12-04

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