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
  • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F58/00—Domestic laundry dryers
  • D06F58/20—General details of domestic laundry dryers 
  • D06F58/24—Condensing arrangements

Definitions

• the invention relates to a domestic appliance according to the preamble of claim 1.
• Conventional dishwashing machines use a number of different wash programs for washing dishes, which usually comprise at least one partial program step "pre-wash”, one sub-program step “cleaning”, at least one sub-program step “intermediate rinse”, one sub-program step “rinse-out” and one partial program step "drying".
• the items to be washed are heated during the partial program step "rinsing" by hot rinsing liquid having a temperature in the range of, for example 55 ° C - 75 ° C, so that the items to be washed during the partial program step "drying" by the intrinsic heat of even dries.
• hot rinsing liquid having a temperature in the range of, for example 55 ° C - 75 ° C, so that the items to be washed during the partial program step "drying" by the intrinsic heat of even dries.
• special heating equipment such as hot air blower, which serve to heat the humid air mixture in the washing, which can then absorb a larger amount of water.
• an adsorption drying is increasingly used for drying the dishes, with moist air from the washing to dehumidify by a water adsorbing, reversibly dehydratable material (adsorbent) is passed.
• adsorbent reversibly dehydratable material
• zeolite is used as the adsorbent, an aluminum-silicate complex having a very high water absorption capacity.
• Water is expelled by heating the adsorbent again.
• heated air is passed as regeneration air through the adsorbent to be regenerated for this purpose.
• absorption drying devices are typically provided with an electric heater.
• the electric heating device is used in the form of a (separate) heating module in the housing of the adsorption drying apparatus, for example by the heating module is locked in a space provided for this purpose device housing.
• Air supply opening of the heating module the heating module is fed with air, which then heated by an electric heating wire, passed through the adsorbent to be regenerated, and is discharged via an air discharge opening again from the adsorption dryer.
• the adsorption drying apparatus can be operated in two different modes of operation, namely in a first mode of operation in which the dehumidified air is supplied to the adsorbent via the heating module, the electrical heating element is not energized, and in a second mode of operation, in which air heated by the energized heating wire and then fed to the adsorbent. Regeneration of the adsorbent by operating the adsorption drying apparatus in the second operating mode takes place, for example, after each complete execution of a washing program.
• the electric heating wire is energized, so that by the first still existing water film undesirable electrical leakage currents are derived via the usually grounded metallic housing of the adsorption dryer (electrical leakage).
• the object of the present invention is to provide an adsorption drying device as described above for dehumidifying moist air available, in which such based on a water film electrical leakage can be avoided.
• the adsorption drying apparatus comprises a device housing which has a first cavity in which a solid adsorbent, for example zeolite, suitable for reversible dehydrogenation is accommodated.
• the apparatus housing of the adsorption drying apparatus is provided with an air discharge opening for discharging air from the adsorption drying apparatus, the air discharge opening being fluidly connected to the first cavity containing the adsorbent for this purpose.
• the heating module for the regeneration (dehydrogenation) of the reversibly dehydratable adsorbent comprises a (separate) from the device housing
• Module housing which is provided with a second cavity.
• an electrical heating element is added, which is suitable for generating ohmic heat.
• the module housing is provided with an air supply opening for supplying air to the heating module, which is fluidically connected to the second cavity (fluid or air conducting).
• the second cavity with the first cavity fluidly connected (fluid or air conducting), so that heated by the electric heating element air can be supplied to the adsorbent.
• the module housing is at least partially received within the device housing, whereby the heating module is integrated into the adsorption dryer.
• the adsorption drying apparatus is essentially characterized by the fact that the module housing of the heating module is electrically insulated with respect to the apparatus housing of the adsorption drying apparatus.
• the module housing of the heating module is electrically insulated with respect to the device housing of the adsorption drying apparatus, electrical leakage currents based on a water film formed by condensation, which can otherwise flow off via the generally grounded device housing of the adsorption drying apparatus, can advantageously be avoided.
• the device housing is made of a cost-effective and technically easy to process metallic material, such as sheet metal, while the module housing is at least partially made of an electrically insulating plastic.
• the module housing may be at least partially received in a mounting opening of the device housing, for example by means of a positive / non-positive connection such as a catch.
• the module housing comprises an electrically insulating material, in particular plastic, existing connection element for connection to the device housing, which is at least partially received in direct contact with the device housing in the mounting opening of the device housing, for example, locked therein is.
• the second cavity is surrounded by an electrically insulating material, whereby an electrical insulation of the wall of the second cavity relative to the module housing can be achieved.
• FIG. 1 shows a schematic sectional view of an embodiment of an adsorption drying device according to the invention with the heating module removed;
• FIG. 2 is a schematic sectional view of a heating module for integration into the adsorption drying apparatus of FIG. 1.
• FIG. 2 is a schematic sectional view of a heating module for integration into the adsorption drying apparatus of FIG. 1.
• Adsorption drying device consisting of a sheet metal device housing 2, which forms a first cavity 7.
• the housing cavity 7 contains a reversibly dehydratable adsorbent 3, for example zeolite.
• an air discharge opening 6 which opens into the first cavity 7 is designed to discharge air from the adsorption drying device 1.
• housing portion is an opening into the first cavity 7 insertion opening 5, which serves for inserting a heating module 8 shown in more detail in Fig. 2 is formed.
• the heating module shown schematically in FIG. 2, designated overall by reference numeral 8, comprises a module housing 9, which in turn is composed of several components.
• the module housing 9 comprises a temperature-resistant, electrically insulating plastic, existing, substantially cylindrical plastic sleeve 10, which upon insertion of the heating module 8 in the
• Insertion opening 5 comes into direct physical contact with the device housing 2.
• the plastic sleeve 10 surrounds with its one end partially a cylindrical first sheet metal sleeve 13, to which it is fastened by a plurality of fastening means 21, for example, screw, rivet or adhesive bonds.
• the plastic sleeve 10 is encompassed by a substantially cylindrical fan outlet 11 and latched, for example.
• a seal 22 is disposed between the second sheet metal sleeve 1 1 and the plastic sleeve 10, for example, a rubber O-ring.
• the first sheet-metal sleeve 13 in turn, partially surrounds a substantially cylindrical microtubule 14 made, for example, of electrically insulating mica (mica).
• a substantially cylindrical microtubule 14 made, for example, of electrically insulating mica (mica).
• the second cavity 20 formed by the micropipe 14 which opens into the first cavity 7 via an end-side first cavity opening 24 accommodated when energized via the electrical connection contacts 18 ohm'sch heated heating wire 15 which is held by the Schudrahtmayn 16.
• the Schudrahtmay 16 are attached for this purpose on the module housing 9, which is not shown in Fig. 2 in detail.
• a thermally triggering circuit breaker 17 is installed, which is suitable to turn off a current supply of the heating wire 15 when a selectable limit temperature within the second cavity 20 is exceeded.
• the heating module 8 shown in FIG. 2 is inserted into the insertion opening 5 of the device housing 2 of the adsorption drying device 1. As shown in more detail in Fig. 2, the insertion opening 5 forming housing portion of the device housing 2 is formed for this purpose in the form of an inwardly slipped clamping ring. If the heating module 8 is inserted into the insertion opening 5, the heating module 8 expands the clamping ring in the radial direction, so that the device housing 2, the heating module 8 and the
• Plastic sleeve 10 of the heating module 8 positively and non-positively surrounds.
• the heating module 8 can be pushed so far into the insertion opening 5 of the device housing 2 until the device housing 2 comes to bear against a formed on the outer surface of the plastic sleeve 10 radial annular collar 19.
• the heating module 8 In its installed position, the heating module 8 has a direct physical contact with the metallic device housing 2 only via the plastic sleeve 10, so that the heating module 8 is electrically insulated from the device housing 2.
• the adsorption drying device 1 explained with reference to the figures serves for dehumidifying humid air or an air-steam mixture of a domestic appliance, such as a dishwasher.
• the adsorption drying apparatus 1 is for this purpose in the Household appliance installed, the device housing 2 is normally grounded electrically for safety reasons.
• the fan outlet 11 of the heating module 8 is connected in an air-conducting manner to the washing container provided for receiving items to be washed.
• the plastic sleeve 10 Luftzuleitö réelle 23 and a formed by the micahülse 14 second end face cavity opening 25 to be humidified moist air or a dehumidified air-steam mixture the second cavity 20 and thus on the first end-side cavity opening 24 the first cavity 7 can be supplied.
• a fan is installed for this purpose, so that the heating module 8 can be subjected to overpressure.
• air can be supplied to the second cavity 20 via the air supply opening 23, which is then supplied in a corresponding manner via the first end-side cavity opening 24 to the first cavity 7.
• the adsorption drying apparatus 1 can thus be supplied with overpressure via the air feed opening 23, which air is again discharged from the adsorption drying apparatus via the air discharge opening 6.
• the reversibly dehydratable adsorbent 3 is disposed within the flow path that on the air supply port 23 into the adsorption drying device 1 on and over
• the adsorption drying device 1 can be operated in a first operating mode in which humid air or an air-steam mixture is to be dehumidified.
• a first operating mode in which humid air or an air-steam mixture is to be dehumidified.
• the adsorbent 3 is consumed by the water absorption and must after receiving one of the type and amount of the adsorbent dependent total amount of water can be regenerated by dehydration.
• the heating wire 15 is not energized in the first operating mode, so that during operation of the adsorption device 1 in the first operating mode due to the generally warm moist air from the washing a water film on the heating wire 15 and the inner walls of the heating module 8 can be reflected.
• the adsorption drying device 1 can be operated in a second operating mode.
• air is supplied via the air supply opening 23 to the second cavity 20 and then to the first cavity 7, and discharged again after passage of the adsorbent 3 via the discharge opening 6 from the adsorption device 1.
• the heating wire 15 is energized in the second operating mode via the two electrical contacts 18, so that the heating wire 15 generates ohmic heat and heats the passing air.
• heated air having a relatively high water absorption capacity passes through the adsorbent 3 and absorbs water, thereby dehydrating the adsorbent 3.
• the adsorption device 1 can be operated in the second operating mode as desired, for example after the expiration of a selectable total operating time of the adsorption drying device 1 in the first operating mode or after each operation of the adsorption drying device 1 in the first operating mode.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Drying Of Gases (AREA)
• Drying Of Solid Materials (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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Cited By (1)

Families Citing this family (7)

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• 2007
  • 2007-10-31 DE DE102007052083A patent/DE102007052083A1/de not_active Withdrawn
• 2008
  • 2008-10-15 EP EP08843541A patent/EP2207466B1/fr not_active Not-in-force
  • 2008-10-15 ES ES08843541T patent/ES2366463T3/es active Active
  • 2008-10-15 AT AT08843541T patent/ATE512618T1/de active
  • 2008-10-15 PL PL08843541T patent/PL2207466T3/pl unknown
  • 2008-10-15 WO PCT/EP2008/063885 patent/WO2009056451A1/fr active Application Filing

Non-Patent Citations (1)

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