Closed-Loop Dishwasher Condenser With Adaptive Airflow Drying
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Solution Overview
Problem
Conventional dishwasher drying systems face inefficiencies in moisture removal during the drying cycle, leading to extended drying times as the temperature differential between moist and dry air decreases, reducing condensation efficiency.
Innovation Solution
A dishwasher equipped with a closed loop condenser featuring a controllable gate that introduces, exhausts, or redirects air to manage air flow, utilizing warm air from heat-emitting components to enhance evaporation and recirculating drier air to absorb humidity, thereby optimizing moisture removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed loop condenser is used to remove moisture during drying, then condensation efficiency is improved, but drying time increases as temperature differential decreases
Solution Approach 1:
The patent applies dynamics by making the gate controllable and adjustable during the drying cycle. The gate can be opened or closed to different extents based on real-time temperature and humidity conditions, allowing the system to adaptively optimize the temperature differential across the heat exchanger. This dynamic adjustment maintains high condensation efficiency throughout the entire drying process, preventing the efficiency degradation that occurs in static systems as temperatures equalize.
Solution Approach 2:
The patent changes the parameter of air flow rate through the gate to optimize performance. By controlling the gate opening degree, the system adjusts the amount of ambient air mixed with exhaust air, thereby changing the temperature parameter of the air entering the heat exchanger. This parameter change ensures that a favorable temperature differential is maintained across the heat exchanger surface, keeping condensation efficiency high throughout the drying cycle.
2Productivity
If a heater is used to accelerate evaporation, then drying speed is improved, but power consumption increases
Solution Approach 1:
The patent applies self-service by utilizing the waste heat already present in the dishwasher's motor compartment and exhaust air for the drying process. Instead of introducing additional energy through a heater, the system recycles and redistributes existing thermal energy to create the temperature differential needed for condensation. This self-service approach accelerates drying without the additional power consumption that would result from using a dedicated heating element.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces drying time and overall cycle duration, decreases power consumption, and improves condensation efficiency by maintaining a favorable temperature and humidity differential within the dishwasher.
Implementation Method 1
the overlying portions of the moist air conduit and the dry air conduit form a heat exchanger to cool the moist air in the moist air conduit and thereby precipitate the moisture from the moist air
Implementation Method 2
cool the moist air in the moist air conduit and thereby precipitate the moisture from the moist air
Implementation Method 3
utilizing warm air from heat-emitting components to enhance evaporation
Data Source
AI summary
A dishwasher with a closed loop condenser having a moist air conduit, a dry air conduit having a portion in overlying relationship with a portion of the moist air conduit, wherein the overlying portions of the moist air conduit and the dry air conduit form a heat exchanger, and a controllable gate for selectively introducing, exhausting, or redirecting air relative to the condenser.