Hand-Press Coffee Machine Unidirectional Valve to Prevent Pre-Soaking
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Solution Overview
Problem
Traditional pressure pump coffee machines suffer from coffee powder pre-soaking and reflow issues, affecting coffee taste and requiring a strict brewing process, making them inconvenient to use.
Innovation Solution
A hand-press coffee machine with a unidirectional valve between the water tank and brewing component prevents water from freely flowing into the brewing chamber, ensuring coffee powder is not pre-soaked and coffee from reflowing, using a valve core and spring or valve ball mechanism to control water flow, allowing high-pressure water to mix with coffee powder effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the filter bowl is interconnected to the coffee box component allowing water to flow freely, then the structure is simple, but the coffee powder gets pre-soaked affecting taste
Solution Approach 1:
A unidirectional valve is introduced as an intermediary component between the water tank and brewing component. This valve allows water to flow from the tank to the brewing chamber during pumping, but prevents backflow that would cause coffee pre-soaking or reflow into the water tank, thus resolving the contradiction between structural simplicity and preventing harmful pre-soaking effects.
2Object-affected harmful factors
If the pressure pump is initiated immediately after adding water, then coffee taste is maintained, but the user must follow a strict fixed process
Solution Approach 1:
The unidirectional valve enables the system to self-regulate water flow direction automatically. Users can add water and coffee powder in any order, and the valve will prevent water from entering the brewing chamber until the hand pump is activated to create positive pressure. This eliminates the need for users to follow a strict sequence, improving ease of operation while maintaining coffee quality.
3Reliability
If the coffee box component is tightly pressed to prevent leakage, then sealing is improved, but coffee can reflow and be sucked into the filter bowl
Solution Approach 1:
The unidirectional valve acts as a mediator between the water tank and brewing component, allowing the coffee box to be tightly sealed for reliability while preventing coffee reflow. The valve opens only when positive pressure from hand pumping forces water into the brewing chamber, and closes to prevent any backflow, thus resolving the contradiction between sealing performance and preventing harmful reflow.
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 ensures excellent coffee quality by preventing pre-soaking and reflow, allowing users to operate the machine freely without adhering to a fixed process, resulting in a convenient and efficient brewing experience.
Implementation Method 1
A unidirectional valve, which is disposed in the water hole between the water tank and the brewing component, is configured to allow the water in the water tank to flow into the brewing component
Implementation Method 2
a hand pump which is disposed at the upper end of the water tank... The hand pump is used to pump the water in the water tank into the brewing component through the water hole
Data Source
AI summary
A hand-press coffee machine comprising a water tank, a hand pump which is disposed at the upper end of the water tank, and a brewing component which is connected to the lower end of the water tank; a water hole is disposed at the point where the water tank and the brewing component are connected; the hand pump is used to pump the water in the water tank into the brewing component through the water hole; a unidirectional valve, which is disposed in the water hole between the water tank and the brewing component, is set to merely allow the water in the water tank to flow into the brewing component; the present invention can effectively protect the coffee powder from being pre-soaked.