Clothes dryer
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Solution Overview
Problem
Existing clothes dryers face inefficiencies when switching between internal and external circulation modes due to unsynchronized operation of airflow inlet and outlet valves, leading to obstructed airflow and suboptimal performance under varying weather conditions.
Innovation Solution
A switching valve with an air-exchange chamber and sealing assembly that allows synchronized control of airflow paths, enabling efficient switching between internal and external circulation modes by selectively sealing inlets and outlets, and utilizing a sensor and controller for stable state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent airflow inlet valve and airflow outlet valve are used, then the dryer can switch between internal and external circulation modes, but the valve operations are not synchronized causing obstructed airflow
Solution Approach 1:
The patent combines the airflow inlet valve and airflow outlet valve into a single integrated switching valve assembly. This unified structure ensures that both valves operate synchronously as a coordinated system, eliminating the airflow obstruction problems caused by unsynchronized independent valve operations while maintaining the ability to switch between internal and external circulation modes
2Object-affected harmful factors
If internal circulation mode is used, then the dryer is suitable for humid seasons, but the drying process takes a long time due to difficulty in discharging water vapor
Solution Approach 1:
The patent implements a dynamic switching mechanism that allows the dryer to adaptively change between internal circulation mode and external circulation mode based on environmental conditions and drying requirements. The switching valve can transition the system from closed internal circulation (suitable for humid seasons) to open external circulation (for faster drying when conditions permit), optimizing both humidity resistance and drying time
3Loss of time
If external circulation mode is used, then the drying time is shortened, but the dryer is affected by external temperature and humidity
Solution Approach 1:
The dynamic switching mechanism enables the dryer to operate in external circulation mode when quick drying is needed and environmental conditions are favorable, then switch to internal circulation mode when external temperature or humidity becomes unfavorable. This dynamic adaptation allows the system to capitalize on the speed advantage of external circulation while mitigating its vulnerability to external conditions
4Device complexity
If independent airflow valves are used, then the structure is simpler, but the valve operations are not synchronized leading to obstructed circulations
Solution Approach 1:
By merging the inlet and outlet valves into a single switching valve assembly with coordinated operation, the patent achieves synchronized valve operations that prevent airflow obstruction. The integrated design maintains reasonable structural complexity while dramatically improving circulation reliability through coordinated valve actuation
Data Source
AI summary
A clothes dryer includes a drum with a first flow path and a flow guiding component with a second flow path. These paths are fluidly connected. Positioned between the drum and component is a switching valve. This valve comprises an air-exchange chamber with a first and second chamber. The first chamber has a first inlet linked to the second flow path and a first outlet linked to the environment. The second chamber has an inlet connected to the environment and an outlet connected to the first flow path. A through hole exists between both chambers. The sealing assembly includes a driving member and two sealing members. The driver rotates the first sealing member, which can selectively cover the first outlet and through hole, while the second member can cover the second outlet.