Compact Diaphragm Pump with Pressure Release Mechanism
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Solution Overview
Problem
The challenge is to create a compact diaphragm pump suitable for use in a blood purification apparatus, where size constraints are critical to avoid increasing the overall apparatus size.
Innovation Solution
The diaphragm pump design includes a case with a diaphragm dividing it into two spaces, a liquid feed flow path, a drive unit with a compression/decompression device and a pressure release mechanism, and a valve mechanism to control fluid flow. This configuration allows for efficient displacement of the diaphragm and compact sizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a diaphragm pump is designed to be compact, then the size of the blood purification apparatus is reduced, but the pump may lack sufficient driving force or efficiency
Solution Approach 1:
The patent applies pneumatic principles by using a compression/decompression device to repeatedly compress and decompress a driving fluid in the second space, causing diaphragm displacement. This pneumatic drive mechanism enables compact pump design while maintaining sufficient driving force through controlled fluid pressure changes rather than mechanical direct contact.
Solution Approach 2:
The patent changes the physical state and pressure parameters of the driving fluid through compression and decompression cycles. By dynamically adjusting the pressure parameters of the driving fluid, the pump achieves efficient diaphragm displacement and liquid feeding in a compact configuration without sacrificing driving capability.
2Productivity
If a compression/decompression device is used to drive the diaphragm, then pump efficiency is improved, but pressure buildup in the driving fluid may cause operational issues
Solution Approach 1:
The patent extracts or removes the excess pressure from the driving fluid using a pressure release mechanism. This mechanism periodically releases the compressed driving fluid from the second space, preventing pressure buildup that would otherwise interfere with diaphragm displacement and pump operation, thereby maintaining high efficiency without pressure-related operational issues.
3Volume of moving object
If the pump components are integrated to reduce size, then the apparatus becomes more compact, but the valve mechanism and flow path complexity may increase
Solution Approach 1:
The patent merges the valve mechanism and flow paths into an integrated structure where the valve mechanism is positioned to directly control the inflow and outflow paths. This consolidation reduces the number of separate components and connections, achieving compactness while managing complexity through functional integration rather than component proliferation.
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 compact diaphragm pump achieves efficient liquid handling while maintaining a small footprint, making it suitable for integration into blood purification apparatuses without increasing their size.
Implementation Method 1
a compression/decompression device that repeatedly causes displacement of the diaphragm by repeating compression and decompression of a driving fluid filling the second space
Implementation Method 2
a compression/decompression device that repeatedly causes displacement of the diaphragm by repeating compression and decompression of a driving fluid filling the second space
Implementation Method 3
a pressure release mechanism to release pressure of the driving fluid after the driving fluid is compressed or decompressed by the compression/decompression device
Data Source
AI summary
A diaphragm pump, includes a case, a diaphragm dividing a space in the case into a first space and a second space, a liquid feed flow path including an inflow path to introduce a liquid to be fed into the first space and an outflow path to discharge the liquid to be fed from the first space, a drive unit including a compression/decompression device that repeatedly causes displacement of the diaphragm by repeating compression and decompression of a driving fluid filling the second space, and a valve mechanism to open and close the inflow path and the outflow path. The drive unit includes a pressure release mechanism to release pressure of the driving fluid after the driving fluid is compressed or decompressed by the compression/decompression device.