Valveless Tea Dispensing Chamber Using Capillary Pressure Control
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Solution Overview
Problem
Commercial tea brewing apparatuses face challenges in maintaining consistent quality due to difficulties in controlling temperature, timing, and apparatus design, which can affect the taste and purity of brewed tea, and often feature mechanical valves that are not aesthetically pleasing and may compromise tea quality.
Innovation Solution
A beverage dispensing apparatus utilizing a valve-less design with a beverage chamber that retains liquid by capillary effect and ambient pressure, featuring a pressure changer to control liquid pressure, allowing for efficient brewing and dispensing without mechanical valves, and an integrated heating system for precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical valves are used for dispensing beverage, then the dispensing function is achieved, but the taste and purity of the tea is compromised and the appearance is not aesthetically pleasing
Solution Approach 1:
The patent removes the mechanical valve component entirely from the beverage dispensing system. Instead of using a valve to control liquid flow, the invention employs a valveless chamber design where liquid is retained and dispensed through capillary action and pressure differential mechanisms, thereby eliminating the harmful contact between mechanical valve surfaces and the beverage.
Solution Approach 2:
The patent replaces the mechanical valve system with a pressure-controlled valveless chamber system. The mechanical opening/closing action of a valve is substituted with pressure differential control (positive pressure to dispense, negative pressure to retain) acting on a chamber with specific capillary structures, eliminating mechanical contact with the beverage.
2Reliability
If mechanical valves are used for dispensing beverage, then the dispensing function is achieved, but the appearance is not aesthetically pleasing
Solution Approach 1:
The patent removes the mechanical valve component entirely from the beverage dispensing system. Instead of using a valve to control liquid flow, the invention employs a valveless chamber design where liquid is retained and dispensed through capillary action and pressure differential mechanisms, thereby eliminating the harmful contact between mechanical valve surfaces and the beverage.
Solution Approach 2:
The patent creates different functional zones within the chamber structure. The dispensing opening has specific capillary properties for liquid retention, while the pressure changer components are positioned to affect pressure without visible mechanical valve elements. This local differentiation of properties allows aesthetic design freedom while maintaining dispensing functionality.
3Object-affected harmful factors
If pressure changer is used to control liquid pressure for capillary retention, then liquid retention without mechanical valves is achieved, but device complexity increases
Solution Approach 1:
The pressure changer component performs multiple functions: it generates positive pressure to dispense liquid from the chamber, creates negative pressure to retain liquid in the chamber, and controls the timing of liquid flow. This multi-functionality reduces the need for separate mechanical valve components, thereby managing complexity while achieving valveless operation.
Solution Approach 2:
The patent uses pneumatic pressure control (gas pressure changes) to manage liquid flow instead of mechanical valve actuation. The pressure changer modifies the gas pressure environment within the chamber to control liquid dispensing and retention, replacing complex mechanical valve mechanisms with a pneumatic control system.
4Productivity
If automated brewing process is implemented, then brewing efficiency and consistency are improved, but device complexity and cost increase
Solution Approach 1:
The patent incorporates preliminary heating of water before it enters the brewing chamber, and pre-positioning of tea leaves in the chamber. The pressure changer is pre-programmed to apply pressure at the correct moments in the brewing process. These preliminary actions automate critical brewing parameters (temperature, timing, pressure) to ensure consistency without requiring overly complex control systems.
Solution Approach 2:
The patent implements periodic pressure changes through the pressure changer to control the brewing and dispensing cycles. The system alternates between positive pressure phases (for dispensing) and negative pressure phases (for brewing/retention) in a periodic manner, automating the brewing process timing and improving consistency through regular cyclic operation.
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 enables automated, fast, and high-quality tea brewing with minimal impact on taste and purity, providing an elegant and efficient brewing process while maintaining optimal parameters, and simplifying cleaning and maintenance.
Implementation Method 1
a dispensing opening adapted to retain the liquid within the beverage chamber by capillary effect
Implementation Method 2
retain the liquid within the beverage chamber by surface tension of the liquid due to the capillary effect
Implementation Method 3
a pressure changer operable to decrease the liquid pressure at the dispensing opening
Implementation Method 4
the pressure changer may be operable to increase the liquid pressure at the dispensing opening to overcome the surface tension and ambient pressure to dispense the liquid via the dispensing opening
Data Source
AI summary
A beverage dispensing apparatus having a beverage chamber adapted to contain a liquid, an inlet adapted to allow the liquid to flow in but not out; a dispensing opening adapted to retain the liquid within the beverage chamber by capillary effect, the dispensing opening adapted to allow the liquid therethrough to flow out, such that the dispensing opening is subjected to a liquid pressure when the beverage chamber contains the liquid; and a pressure changer operable to decrease the liquid pressure at the dispensing opening; such that the pressure changer is adapted to decrease the liquid pressure when the liquid flows in so as to retain the liquid within the beverage chamber by surface tension of the liquid due to the capillary effect and ambient pressure at the dispensing opening. A method of dispensing the beverage, a beverage brewing apparatus and a method of brewing the beverage is also provided.