Coffee Capsule Extraction Flow Control for Blockage Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coffee extraction devices face blockage issues when high-pressure water and steam are supplied to coffee capsules, leading to incomplete extraction and potential safety hazards due to the release of high-temperature, high-pressure fluids.
Innovation Solution
A coffee extraction device with a flow rate sensor and control unit that manages pump operation by stopping and re-driving the pump when a blockage is detected, applying varying voltages to manage pressure and clear blockages, and notifying the user of abnormal extraction functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure water and steam are supplied to coffee capsules, then coffee extraction efficiency is improved, but blockage phenomenon occurs in coffee powder
Solution Approach 1:
The pump operates in periodic cycles: high-pressure water is supplied for a predetermined time to extract coffee, then the pump stops for a predetermined time to allow pressure release and prevent blockage. This periodic operation pattern enables continuous coffee extraction while preventing the blockage phenomenon that would occur with continuous high-pressure supply.
Solution Approach 2:
The system dynamically changes the pressure parameter by controlling the pump's on/off timing. During the extraction phase, high pressure is applied; during the pause phase, pressure is reduced to zero. This parameter variation allows the system to achieve both efficient extraction and blockage prevention.
2Productivity
If high-pressure pumps are operated continuously to maintain extraction, then coffee extraction continues, but pump failure occurs due to excessive load
Solution Approach 1:
The pump is operated periodically rather than continuously, with high-pressure supply for a predetermined time followed by a stop for a predetermined time. This periodic operation reduces the cumulative load on the pump, preventing overheating and mechanical failure while maintaining continuous coffee extraction capability through repeated cycles.
Solution Approach 2:
The system incorporates predetermined pause intervals before the pump reaches a critical load state. These advance pauses allow pressure release and motor cooling, cushioning against the excessive load that would otherwise cause pump failure during continuous operation.
3Ease of operation
If users forcibly open coffee extraction units, then access to capsules is achieved, but high-temperature high-pressure water and steam are released externally
Solution Approach 1:
The system executes a periodic cycle where high-pressure water supply is followed by a predetermined pause that allows pressure to equalize. When users open the extraction unit during or after the pause phase, the residual pressure is significantly reduced, minimizing the hazard of hot water and steam release while still allowing timely capsule access.
Solution Approach 2:
The predetermined pause period acts as a safety cushion before user access is needed. During this pause, pressure is released in advance, cushioning against the potential harmful release of high-temperature, high-pressure fluids when users open the unit.
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
Enables stable coffee extraction by changing the pressure of water and steam supplied to the capsule, determining and removing blockages, and ensuring user safety by managing residual pressure.
Implementation Method 1
a pump pressurizing water and supplying the water to the coffee extraction unit
Implementation Method 2
a heater installed on a flow path between the pump and the coffee extraction unit to heat the water supplied to the coffee extraction unit
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a coffee extraction device and a coffee extraction method, which are capable of extracting coffee from a coffee capsule (capsule coffee) and the like. The coffee extraction device can comprise: a coffee extraction unit on which a coffee capsule is to be mounted; a pump for pressurizing water and supplying the same to the coffee extraction unit; a flow rate sensor for measuring the flow rate of water to be supplied to the coffee extraction unit; and a control unit for controlling the operation of the pump on the basis of the flow rate to be sensed at the flow rate sensor. In addition, the coffee extraction method can comprise: a pump operation step of operating a pump in order to supply high pressure water to a coffee capsule; and a re-extraction step of stopping the operation of the pump and then re-operating the pump, when the flow rate of water to be supplied to the coffee capsule is smaller than a set flow rate. According to the coffee extraction device and the coffee extraction method, the pressure of water (steam) to be supplied to a coffee capsule is varied, thereby obtaining an effect of enabling stable coffee extraction even if a blocking phenomenon occurs in a coffee powder accommodated inside the coffee capsule.