Airpot beverage dispenser
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Solution Overview
Problem
Airpot beverage dispensers face issues such as auto-pumping, pressure buildup leading to potential damage, and liquid leakage, especially when not in the upright position or during transport.
Innovation Solution
The design incorporates a valve assembly with a duckbill valve and a skirt valve to control pressure and prevent leakage, allowing the dispenser to switch between an operating state for dispensing and a locked state to prevent leakage when not upright, featuring a bellows system with a push button actuator and a pressure relief mechanism to manage internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a bellows actuator is used to force air into the hollow body for beverage dispensing, then beverage flow is enabled, but pressure buildup may damage the dispenser
Solution Approach 1:
A pressure relief valve is incorporated into the dispenser design to automatically release excess pressure before it can cause damage to the dispenser structure. This preventive measure ensures that while the bellows can build up necessary pressure for beverage dispensing, any excessive pressure is safely vented through the relief valve, protecting the dispenser from potential damage.
2Productivity
If the bellows is actuated to force beverage out, then beverage dispensing is achieved, but auto-pumping phenomenon occurs
Solution Approach 1:
A check valve is positioned at the outlet of the feed tube to provide feedback control on the beverage flow. When beverage flows out through the spout, the check valve closes to prevent backflow and automatic re-pumping. This feedback mechanism ensures that beverage dispensing occurs only when the bellows is actively actuated, eliminating the auto-pumping phenomenon and providing stable, controllable dispensing.
3Adaptability or versatility
If the dispenser is moved or stored out of vertical orientation, then portability is improved, but liquid leakage occurs
Solution Approach 1:
A float valve mechanism is incorporated that dynamically adjusts its position based on the dispenser's orientation. When the dispenser is upright, the float valve allows normal beverage flow. When the dispenser is tilted or moved, the float rises and automatically closes the valve, preventing leakage. This dynamic adaptation enables the dispenser to maintain leak-free operation regardless of its orientation or movement state.
4Ease of operation
If the spout is located at the top for easy serving, then beverage access is improved, but pressure control becomes more difficult
Solution Approach 1:
A feed tube with an integrated check valve serves as an intermediary between the pressurized hollow body and the top spout. The feed tube delivers beverage upward to the conveniently located spout, while the check valve within the feed tube automatically controls pressure by preventing backflow. This intermediary structure maintains simple pressure control while enabling easy top-position beverage serving.
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 effectively prevents auto-pumping, manages pressure to avoid damage, and ensures leak-proof operation when the dispenser is not in an upright position, enhancing safety and usability.
Implementation Method 1
When the bellows is actuated, the pressure within the hollow body is increased relative to atmospheric pressure and this pressure differential forces the beverage up the feed tube and out of the spout
Implementation Method 2
A valve assembly is positioned within the chamber and includes a duckbill valve and a skirt valve
Implementation Method 3
the skirt valve portion is designed to relieve excess pressure within the beverage cavity
Implementation Method 4
the contents are prevented from developing temperature equilibrium with the ambient air and resultant degradation of the beverage by means of insulation
Data Source
AI summary
An airpot beverage dispenser having a body with a beverage cavity, a lid with lower and upper lid portions, a bellows within the upper lid portion, an actuator for compressing the bellows to increase the pressure of trapped air in the bellows, a duckbill valve, a skirt valve extending fully around the duckbill valve, and a spout. The skirt valve is movable into sealing engagement with a lid lower wall to define an air flow path from the bellows to the beverage cavity, and when the pressure of the trapped air in the bellows is sufficiently increased, the duckbill valve opens and passes the trapped air to the beverage cavity to force beverage out the spout. When the spout is moved to a stored position and the dispenser is in a locked state, the skirt valve serves as a relief valve to prevent over pressure in the beverage cavity.