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Dishwasher with controlled dry cycle

  • US 10,506,907 B2
  • Filed: 02/09/2018
  • Issued: 12/17/2019
  • Est. Priority Date: 08/28/2012
  • Status: Active Grant
First Claim
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1. A dishwasher, comprising:

  • a tub at least partially defining a treating chamber;

    a closed loop condensation system including a dry air conduit having a portion in overlying relationship with a portion of a moist air conduit and where the dry air conduit is fluidly separate from the treating chamber and the moist air conduit, and where the moist air conduit is fluidly coupled to the treating chamber, and where overlying portions of the moist air conduit and the dry air conduit are configured to form a heat exchanger, and the heat exchanger is configured to precipitate moisture from treating chamber air in the moist air conduit;

    a first temperature sensor within the dry air conduit of the closed loop condensation system upstream of the heat exchanger or operably coupled to the portion of the dry air conduit that is in overlying relationship with the portion of the moist air conduit and outputting a signal indicative of an external air temperature value;

    a second temperature sensor outputting a signal indicative of a temperature of the treating chamber air to define a treating chamber air temperature;

    a fan having a first stage fluidly coupled to the moist air conduit and configured to pull moist air from the treating chamber into the moist air conduit to define a circulation; and

    a controller operably coupled to the first temperature sensor, second temperature sensor, and the fan, the controller configured to receive the signal indicative of an external air temperature value, receive the signal indicative of the treating chamber air temperature, determine a difference value indicative of a temperature difference between the external air temperature value and the treating chamber air temperature, set a circulating time based on the difference value and operate the fan to circulate the treating chamber air through the moist air conduit and the heat exchanger and back through the treating chamber in the closed loop condensation system for the circulating time while supplying external air over the heat exchanger while the heat exchanger removes liquid from the circulating treating chamber air.

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