Conditioning system for a condenser dryer appliance
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Solution Overview
Problem
Conventional condenser dryers face efficiency limitations due to ambient air temperature variations, leading to undesirable laundry room heating and inefficient condensate generation, with existing systems recirculating indoor air causing further heating issues.
Innovation Solution
A condenser dryer with a reversible cooling air fan that can draw cooling air from either indoor or outdoor environments based on temperature conditions, allowing for improved thermal management and efficiency by switching between modes to optimize heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ambient air is used to cool the condenser, then condenser cooling efficiency is improved, but laundry room temperature increases causing undesirable heating
Solution Approach 1:
The patent applies inversion by reversing the conventional air flow direction. Instead of drawing cooling air from the laundry room and discharging it outside (which heats the room), the system draws cooling air from outside and discharges it inside the laundry room. This reverses the harmful thermal effect, allowing the laundry room to be cooled or maintained at a stable temperature while the condenser is still effectively cooled.
2Quantity of substance
If indoor air is recirculated to cool the condenser, then cooling air availability is improved, but laundry room temperature increases over time
Solution Approach 1:
The patent extracts the problematic thermal loop by taking the cooling air intake from outside the laundry room rather than from inside. This separates the condenser cooling function from the laundry room thermal environment, allowing the condenser to be cooled without continuously heating the laundry room air.
3Adaptability or versatility
If cooling air temperature varies with ambient conditions, then system adaptability is improved, but drying efficiency becomes inconsistent
Solution Approach 1:
The patent implements feedback control by using temperature sensors to monitor both the condenser temperature and the ambient air temperature. The controller adjusts the cooling air fan speed and the heating element operation based on this feedback, maintaining consistent condenser cooling and drying efficiency regardless of ambient temperature variations.
Solution Approach 2:
The system dynamically changes operating parameters including cooling air fan speed, heating element power, and air flow rates based on ambient temperature conditions. This allows the system to adapt to varying ambient temperatures while maintaining consistent drying performance through real-time parameter adjustment.
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
Enhances drying performance by improving heat exchange efficiency and reducing laundry room heating, whether in hot or cold weather, through adaptive air flow direction based on ambient temperature.
Implementation Method 1
passing the process air over a condenser to remove moisture from the process air
Implementation Method 2
a cooling air fan fluidly coupled to the cooling air flow path for urging a flow of cooling air along the cooling air flow path
Implementation Method 3
a blower fan fluidly coupled to the process air flow path for urging a flow of process air along the process air flow path
Implementation Method 4
passing the process air over a condenser to remove moisture from the process air
Data Source
AI summary
A condenser dryer including a cabinet defining an indoor air vent and an external air vent, a drum rotatably mounted within the cabinet, the drum being fluidly coupled to a supply duct and a return duct, and a conditioning system positioned within the cabinet, wherein the conditioning system is fluidly coupled to the supply duct and the return duct to define a process air flow path and is fluidly coupled to the indoor air vent and the external air vent to define a cooling air flow path. A blower fan urges a flow of process air along the process air flow path and a cooling air fan urges a flow of cooling air through the cooling air flow path, wherein the cooling air fan is reversible to draw the flow of cooling air in through the indoor air vent or through the external air vent depending on conditions.