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 present invention relates to a dishwasher wherein the drying effectiveness is increased.
• the air is circulated within this channel by means of a Ian, some of the moisture in the air can be condensed when in contact with the surfaces thereof that are comparably cooler than the inside of the tub; however, all of the moisture in the tub cannot be absorbed and spotting is observed on the washed items at the end of the drying phase due to the residual moisture.
• thermoelectric units are used that provide the hot or cold effect to be dispersed into the environment depending on the direction of the current applied thereon; however, devices such as condensers and heaters are also required besides the thermoelectric unit to accelerate the drying process.
• the exothermic part of the Peltier element is mounted inside an air channel, and the air received from the environment with a relatively lower temperature is passed through the heat exchanger with bars disposed on the exothermic part of the thermoelectric unit.
• the endothermic part of the Peltier element is again arranged inside the dishwasher tub, and the exothermic part is mounted on the other side of the air channel between the tub and the exterior body of the machine. In such an application, since the endothermic part of the Peltier element is inside the tub, it will primarily try to cool the tub walls having high thermal inertia
• the performance of the Peltier element decreases even if the capacity of the circulating air increases in absorbing humidity from the washed items, when it meets the endothermic part again it will condense with more difficulty to leave the moisture.
• a drying method for a household appliance in particular dishwasher wherein a Peltier element is used. Condensation is maintained on the inner wall of the tub by means of the endothermic part of the Peltier element being in contact with a plate and the plate in contact with the tub.
• the exothermic part of the Peltier element is inside an air channel and the air aspirated from inside the tub by means of a blower is heated as it passes through the exothermic part and is sent into the tub.
• a condenser and a heater are used in the air channel in order to support the condensation and heating of the drying air.
• the aim of the present invention is the realization of a dishwasher wherein drying effectiveness is increased by removing the moisture left in the tub after the washing process.
• thermoelectric unit In the dishwasher of the present invention, a thermoelectric unit is used having an endothermic part absorbing the ambient heat in order to condense the air in the tub for removing the moisture and for drying the washed items, and an exothermic part that emits heat to the surroundings.
• the thermoelectric unit is mounted inside a condensation channel situated outside the tub that circulates the air received from inside the tub, delivering it again into the tub.
• the endothermic part of the thermoelectric unit is disposed inside the condensation channel and the exothermic part is outside the condensation channel, the endothermic part inside the condensation channel is not in contact with the tub.
• thermoelectric unit in the condensation channel hence the temperature being lowered is delivered into the tub without reheating, thus the condensation of the air circulating in the cycle is increased by lowering the temperature. Since the exothermic part of the thermoelectric unit is disposed outside the tub such that it is not in contact with the tub, the created cold effect is prevented from decreasing by dispersing to the tub walls.
• a cooling channel is provided on the exterior side of the condensation channel, the inner part formed by the outer walls of the condensation channel and the outer part formed by the outer walls of the dishwasher body, with the exothermic part of the thermoelectric unit situated inside.
• the ambient air passed through the cooling channel cools the thermoelectric unit by getting in contact with the exothermic part thereof, thus the performance of the thermoelectric unit is increased by providing the desired heat flow.
• the condensation channel and the cooling channel each have an air inlet and an air outlet, the humid air in the tub is passed through the condensation channel by means of a Ian and the air of the exterior environment is passed through the cooling channel by means of another Ian.
• thermoelectric unit In the dishwasher of the present invention, furthermore the condensation of the air flowing in the condensation channel is accelerated and the efficiency of the thermoelectric unit is increased by utilizing an endothermic part heat exchanger situated on the endothermic part of the thermoelectric unit and an exothermic part heat exchanger situated on the exothermic part of the thermoelectric unit.
• Figure 1 - is the schematic view of a dishwasher.
• the dishwasher (1) comprises a tub (2) wherein the washing process is carried out, and a thermoelectric unit (3) utilized for condensation of the drying air.
• thermoelectric unit (3) comprises an endothermic part (4) creating a cold effect by absorbing the ambient heat and an exothermic part (5) that emits heat into the surroundings.
• the dishwasher (1) of the present invention comprises a condensation channel (6) that provides the circulation of the humid air in the tub (2) by delivering it out of the tub (2) and a thermoelectric unit (3) with the endothermic part (4) thereof disposed in the condensation channel (6) such that it is not in contact with the tub (2) and the exothermic part (5) mounted on the wall of the condensation channel (6) such that it will be on the outside of the condensation channel (6).
• the humid air received from the tub (2) with the condensation channel (6) is condensed by only being in contact with the endothermic part (4) and without being in contact with the exothermic part (5) of the thermoelectric unit (3) and the air leaving the contained moisture at the endothermic part (4) and its temperature lowered is sent into the tub (2) by means of the condensation channel (6) after leaving the endothermic part (4).
• the dishwasher (1) furthermore comprises a condensation channel inlet (J) providing to deliver the humid air from the tub (2) into the condensation channel (6), a condensation channel outlet (8) providing the dehumidified and cooled air to the tub (2) and a condensation channel Ian (9) that provides the flow of air in the condensation channel (6).
• a condensation channel inlet (J) providing to deliver the humid air from the tub (2) into the condensation channel (6)
• a condensation channel outlet (8) providing the dehumidified and cooled air to the tub (2)
• a condensation channel Ian (9) that provides the flow of air in the condensation channel (6).
• the dishwasher (1) comprises a cooling channel (10) situated between the condensation channel (6) and the outer wall of the body, inside which the exothermic part (5) of the thermoelectric unit (3) is disposed, providing the air received from the outer environment to contact with the exothermic part (5) and the heated air to be sent to the outer environment.
• the dishwasher (1) furthermore comprises a cooling channel inlet (11) for receiving the air from the outer environment into the cooling channel (10), a cooling channel outlet (12) for redelivering the air heated in the cooling channel (10) to the outer environment and a cooling channel Ian (13) providing the flow of air in the cooling channel (10).
• the dishwasher (1) comprises an endothermic part heat exchanger (14) disposed on the endothermic part (4) of the thermoelectric unit (3), extending towards the inside of the condensation channel (6), being in contact with the air flowing in the condensation channel (6) to accelerate condensation and an exothermic part heat exchanger (15) situated on the exothermic part (5) of the thermoelectric unit (3) extending towards the inside of the cooling channel (10) and increasing the heat flow of the thermoelectric unit (3) thus increasing the efficiency thereof.
• thermoelectric unit (3) is energized as the drying phase starts, while the temperature of the endothermic part (4) is lowered, the temperature of the exothermic part (5) goes up.
• the hot and cold effects are dispersed in the condensation channel (6) and the cooling channel (10) by utilizing the endothermic part heat exchanger (14) and the exothermic part heat exchanger (15).
• the condensation channel Ian (9) and the cooling channel Ian (13) are also energized.
• the condensation channel Ian (9) By means of the condensation channel Ian (9) the humid air received from the interior environment of the tub (2) enters the condensation channel (6) through the condensation channel inlet (J) and the moisture contained in the air is condensed as it passes from the endothermic part (4) of the thermoelectric unit (3).
• the dehumidified air is sent into the tub (2) from the condensation channel outlet (8). Since the temperature inside the tub (2) goes down as long as the cycle continues wherein the air in the tub (2) is in contact with the endothermic part (4) of the thermoelectric unit (3), condensation is accelerated and less energy is required for condensing the air by cooling.
• the air aspirated from the outer environment by the cooling channel Ian (13) passing through the cooling channel inlet (11) is blown unto the exothermic part (5) of the thermoelectric unit (3) and thus the thermoelectric unit (3) is provided to operate more efficiently.
• the ambient air heated by cooling the exothermic part (5) of the thermoelectric unit (3) is delivered into the environment from the cooling channel outlet (12).
• the air meeting with the endothermic part (4) of the thermoelectric unit (3) in the condensation channel (6) thus decreasing in temperature is delivered again into the tub (2) without being heated, the energy required for reaching the required coolness for condensation during the cycle is decreased and since the endothermic part (4) of the thermoelectric unit (3) is not in contact with the body of the tub (2), the created coldness effect is prevented from decreasing by dispersing to the walls of the tub (2).
• the condensation capability of the circulating air is increased, moisture residue and thus the formation of spots on the washed dishes is prevented by providing to remove the moisture in the tub (2) more effectively.
• the exothermic part (5) of the thermoelectric unit (3) is cooled by the circulated ambient air in the cooling channel (10), the performance thereof is increased by maintaining the desired heat flow.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Washing And Drying Of Tableware (AREA)
• Drying Of Solid Materials (AREA)

Applications Claiming Priority (2)

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• 2007
  • 2007-05-29 DE DE602007004109T patent/DE602007004109D1/de active Active
  • 2007-05-29 EP EP07729632A patent/EP2026691B1/de active Active
  • 2007-05-29 ES ES07729632T patent/ES2336845T3/es active Active
  • 2007-05-29 WO PCT/EP2007/055212 patent/WO2007138064A1/en not_active Ceased
  • 2007-05-29 AT AT07729632T patent/ATE453356T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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