Steam Dryer Door Interlock to Reduce Operator Burn Risk
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Solution Overview
Problem
The risk of accidents from hot steam during the operation of domestic appliances like dryers and washing machines is not adequately addressed, as operators may unintentionally open doors during steam treatment programs, leading to potential harm from the hot steam inside the appliance.
Innovation Solution
Implementing sensing mechanisms connected to control systems that detect door openings or program interruptions, triggering warning signals and controlling steam supply to prevent operator exposure to hot steam, including stopping steam delivery, reversing steam flow, or safely venting steam outside the appliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a door opening mechanism is provided for loading and unloading textiles, then ease of operation is improved, but the risk of operator injury from hot steam increases
Solution Approach 1:
The control system performs preliminary actions by detecting door opening intent through sensing means before the door actually opens, and preemptively stops steam supply or activates warning signals to prevent operator injury from hot steam
Solution Approach 2:
The sensing means connected to the door mechanism provide feedback to the control system about door opening/closing status, enabling the control system to automatically adjust steam supply and activate warning signals based on real-time door position information
2Object-affected harmful factors
If sensing means and control systems are added to detect door openings and manage steam supply, then operator safety is improved, but device complexity increases
Solution Approach 1:
The control system serves multiple functions: it controls the steam generator, manages the steam supply valve, activates warning signals, and coordinates door mechanism operations, thereby integrating safety features into an existing multi-functional system rather than adding separate dedicated safety devices
Solution Approach 2:
The sensing means act as intermediaries between the door mechanism and the control system, translating physical door position into electrical signals that the control system can process to automatically manage steam supply and warning signals
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
Significantly reduces the risk of operator injury by ensuring awareness of hot steam conditions and safely managing steam during interruptions, whether caused by door openings, button activations, or appliance failures, through warning signals and controlled steam handling.
Implementation Method 1
a steam generator (22) for producing hot steam from water
Implementation Method 2
a pump (21) for supplying water from a container (20) to the steam generator (22)
Data Source
Figure 1
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AI summary
The invention concerns a method for operating a domestic appliance, especially a home dryer (1) or a washing machine, and a domestic appliance (1) which comprises an operating mode for treating textiles with steam. According to the method at least one action for protection of an operator of the domestic appliance (1) is taken when an interruption of an active program for treating textiles with hot steam occurs. The method shall prevent that the operator is hurt by the hot steam generated in the domestic appliance. The domestic appliance (1) comprises a control (40) and a memory (41) storing at least one program for treating textiles with steam, wherein the control (40) is adjusted to execute the inventive method.