Aircraft Coffee Maker Assembly Without Pressure Vessels
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Solution Overview
Problem
Existing coffee maker systems on aircraft are prone to spills, heavy, complex, and require frequent maintenance, leading to reliability issues and increased operating costs.
Innovation Solution
A coffee maker assembly with a flow control valve, a decanter with anti-spill features, and capacitive elements to detect coffee level, along with a secure mounting system to prevent spills and simplify maintenance, using a copper flow coil and heating element at standard cabin pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If sealed pressure vessels are used to heat and dispense coffee, then coffee can be dispensed under pressure, but the system becomes heavy and bulky
Solution Approach 1:
The patent removes the pressure vessel from the system entirely. Instead of using a sealed pressure vessel to heat and dispense coffee, the invention uses an open brewing chamber where water is heated and coffee is brewed at atmospheric pressure. The brewed coffee is then dispensed through a valve mechanism without requiring pressure containment, thereby eliminating the heavy and bulky pressure vessel while maintaining coffee dispensing functionality.
Solution Approach 2:
The patent uses a valve-controlled hydraulic system to dispense coffee. A valve mechanism controls the flow of brewed coffee from the brewing chamber to the serving container, replacing the need for pressure vessels. This hydraulic control approach achieves coffee dispensing without requiring high pressure containment, thus reducing system weight and bulk.
2Ease of operation
If open-topped pots are used to receive brewed coffee, then coffee can be easily served, but coffee spills easily during turbulence or movement
Solution Approach 1:
The patent secures the brewing chamber and serving container in fixed positions within the aircraft galley before flight turbulence occurs. Latching mechanisms and secure mounting structures are engaged in advance to prevent movement during turbulence. This preliminary securing action ensures that coffee cannot spill during turbulence while maintaining ease of operation during calm periods when coffee is being served.
Solution Approach 2:
The patent incorporates spill prevention features such as overflow channels and protective shields that are positioned in advance to catch or redirect coffee flow before it can spill during unexpected turbulence. These cushioning features provide a safety margin that prevents spills even when movement occurs during service.
3Power
If pressure vessel systems are used for coffee brewing, then coffee can be dispensed under pressure, but the systems are complex and expensive to operate
Solution Approach 1:
The patent extracts and removes the complex pressure vessel system from the coffee brewing apparatus. By using an open brewing chamber at atmospheric pressure with a simple valve-controlled dispensing mechanism, the invention eliminates the need for pressure containment vessels, pressure gauges, safety valves, and other complex components associated with pressurized systems, thereby reducing overall system complexity.
Solution Approach 2:
The patent replaces the mechanical pressure vessel system with a simpler valve-controlled flow system. Instead of relying on pressurized containment and mechanical pressure regulation, the invention uses a valve mechanism to control coffee flow from an open brewing chamber, substituting a complex mechanical pressure system with a simpler fluid control system.
4Productivity
If known coffee maker systems are used on aircraft, then coffee can be brewed and dispensed, but frequent and difficult maintenance is required
Solution Approach 1:
The patent divides the coffee brewing system into modular, easily replaceable components including the brewing chamber, valve assembly, heating element, and serving container. Each module can be independently accessed, inspected, and replaced without disassembling the entire system. This segmentation enables frequent maintenance and repair without requiring complex disassembly procedures or taking the aircraft out of service for extended periods.
Solution Approach 2:
The patent incorporates self-cleaning features and easy-access design elements that allow crew members to perform basic maintenance tasks themselves without requiring specialized service personnel. The open brewing chamber design facilitates easy cleaning and inspection, and the modular components can be quickly replaced by trained crew members, reducing maintenance difficulty and frequency of professional service requirements.
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
The solution provides a safe, reliable, and easy-to-maintain coffee maker system that prevents spills and reduces weight and maintenance costs, ensuring efficient coffee production without grounding aircraft for service.
Implementation Method 1
a heater element... Water is heated inside these pressure vessels
Implementation Method 2
the flow control valve is an electrically controlled solenoid valve
Implementation Method 3
first and second capacitive elements are mounted to a lid the closes the decanter. These elements are coupled to electrical circuitry operable to detect a change in capacitance between the first and second capacitive elements.
Data Source
AI summary
A coffee maker assembly particularly suitable for aircraft use delivers hot coffee into a decanter that can be removed from the assembly to serve the coffee to passengers and crew inside an aircraft cabin. The assembly includes an electronically controlled solenoid valve that controls the delivery of water from a reservoir into a coil heater. Electronic circuitry in the system controls the assembly's operation and provides various indications to a user of the system. Various automatic valves, couplings, and other features ensure safe and reliable operation with minimal maintenance.