Recoil Damper Structure for Accurate Oscillating Pump Flow Metering
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Solution Overview
Problem
Existing coffee machine designs face issues with pressure shocks from oscillating piston pumps affecting flow meter accuracy due to fluctuations in pressure and voltage, leading to inconsistent coffee drink fill levels.
Innovation Solution
Incorporating a recoil damper with changes in diameter and an expandable container between the pump and flow meter to absorb pressure recoils, allowing for a space-saving and reliable installation that minimizes the impact of pressure shocks on flow meter readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a loop of silicone tubing is arranged to reduce pressure shocks, then the flow meter accuracy is improved, but the device complexity and space requirements increase
Solution Approach 1:
The liquid line is segmented into multiple sections with different diameters. A first section has a larger diameter than the second section, creating a defined expansion volume that absorbs pressure recoils without requiring a long flexible hose loop, thus simplifying installation while maintaining measurement accuracy.
Solution Approach 2:
The diameter parameter of the liquid line is changed along its length. By transitioning from a larger diameter in the first section to a smaller diameter in the second section, the system creates an expansion chamber that reduces pressure shocks, achieving the same effect as a flexible loop but with a more rigid and installation-friendly structure.
2Measurement precision
If a long flexible hose is used to reduce pressure recoils, then the flow meter measurement accuracy is improved, but the risk of kinking and assembly errors increases
Solution Approach 1:
Instead of using a long flexible hose that requires careful assembly, the liquid line is divided into two rigid sections with different diameters. This segmentation eliminates the kinking risk associated with flexible hoses while maintaining the pressure recoil reduction function through the defined expansion volume.
Solution Approach 2:
The invention replaces the flexible hose (which is prone to kinking and assembly errors) with a simple rigid pipe structure featuring diameter changes. This simpler structure is more reliable, easier to assemble, and eliminates the maintenance issues associated with flexible tubing.
3Object-affected harmful factors
If the liquid line diameter is reduced between the pump and flow meter, then pressure shocks are reduced, but the flow rate and productivity decrease
Solution Approach 1:
The liquid line is segmented into a first section with larger diameter for high flow capacity and a second section with smaller diameter for pressure shock reduction. This segmentation allows the system to maintain high productivity in the first section while protecting the flow meter in the second section from pressure recoils.
Solution Approach 2:
Different diameter sections are applied locally where needed. The larger diameter is used in the section where high flow rate is critical, while the smaller diameter is used in the section where pressure shock reduction is most effective, optimizing both productivity and measurement accuracy.
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 recoil damper effectively reduces pressure shocks, ensuring accurate flow meter readings and consistent coffee drink fill levels by expanding the water volume to alleviate pressure, thus maintaining measurement accuracy and simplifying assembly.
Implementation Method 1
pressure setbacks can be alleviated by the possibility of expanding the amount of water between the pump and the flow meter
Implementation Method 2
which expandably accommodates the expansion volume
Implementation Method 3
dam up the water flowing back in the event of a pressure recoil within the container and in the pressure direction before the flow meter
Data Source
Figure 1~2
AI summary
The coffee machine has a water storage tank and a heating device. The water storage tank and the heating device are connected by a liquid conduit (1), in which a flow meter (2) and an oscillating piston pump (4) are arranged. A pipe section (6) is provided with two diameter deviations between the flow meter and the pump. A container (14) is arranged between the flow meter and the piston pump for an expanded volume (16) as a section of promoted water.