A device (5), arranged for fluid communication with a washing chamber (2) of a dishwasher (1), the device further being arranged to allow a passage of air (9) between the washing chamber and the device, the device comprising a drying material (10) arranged in a bed (11), the drying material being ab
A device (5), arranged for fluid communication with a washing chamber (2) of a dishwasher (1), the device further being arranged to allow a passage of air (9) between the washing chamber and the device, the device comprising a drying material (10) arranged in a bed (11), the drying material being able to withdraw moisture from the air passing through the bed during a withdrawal step, and release moisture to the air during a regeneration step, a heating element (13) arranged in the bed arranged to heat the drying material during the regeneration step such that moisture is released from the drying material, and a fan (14), arranged to circulate the air between the device and the washing chamber such that the air flow rate during the withdrawal step is higher than the air flow rate during the regeneration step by altering the fan speed.
대표청구항▼
1. A method of processing air in a dishwasher, the dishwasher comprising a washing chamber and a device, the device comprising a drying material comprising activated alumina and arranged in a bed, a heating element arranged in the bed, and a fan, the method comprising: circulating the air between th
1. A method of processing air in a dishwasher, the dishwasher comprising a washing chamber and a device, the device comprising a drying material comprising activated alumina and arranged in a bed, a heating element arranged in the bed, and a fan, the method comprising: circulating the air between the washing chamber and the device such that at least part of the air passes through the bed allowing the air to contact the drying material of said bed;withdrawing moisture from the air passing through the bed by means of the drying material, the air passing through the bed at a first mean flow rate;regenerating the drying material by heating the bed by means of the heating element and releasing at least part of the moisture to the air at a second mean flow rate; andaltering, during the regeneration step, the fan speed such that the first mean flow rate is higher than the second mean flow rate, wherein the fan speed is substantially periodical such that the fan speed is altered between a first fan speed, being substantially the same as the fan speed during the withdrawal step, and a second fan speed, being zero. 2. The method of claim 1, wherein withdrawing moisture from the air passing further comprises operating the fan with a substantially constant speed. 3. The method of claim 1, wherein regenerating the drying material further comprises operating the fan with substantially constant speed. 4. The method of claim 1, wherein the heating element is an electrical heating resistor in the form of a wire, a coil, a loop, or a sheet. 5. The method of claim 1, wherein regenerating the drying material further comprises heating the drying material with the heating element to a temperature of 100-250° C. 6. The method of claim 1, wherein the device further comprises a container at least partly enclosing the bed, the container being arranged for a passage of air through the container. 7. The method of claim 6, wherein the container comprises a heat resistant insulating material. 8. The method of claim 7, wherein the heat resistant insulating material comprises a mineral material. 9. The method of claim 8, wherein the mineral material is Mica or alumina. 10. The method of claim 6, wherein the device further comprises a housing at least partly enclosing the container wherein the housing comprises an inlet and an outlet arranged for passage of air through the housing. 11. The method of claim 10, wherein the housing comprises an insulating material. 12. The method of claim 11, wherein the insulating material comprises a plastic. 13. The method of claim 10, wherein the container and the housing define a space therebetween, such that a portion of the air passing through the housing passes between the container and the housing, without passing through the bed, when the device is in use. 14. The method of claim 1, wherein regenerating the drying material further comprises heating the drying material with the heating element to a temperature of 130-200° C. 15. The method of claim 1, wherein regenerating the drying material further comprises heating the drying material with the heating element to a temperature of 150-180° C.
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