Fish Circulatory Gas Injection for Complete Bleeding and Freshness
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Solution Overview
Problem
Conventional fish bleeding methods fail to completely remove blood from the fish body, leading to spoilage and deterioration of freshness, particularly from a chemical standpoint, and there is a demand for further improvement in maintaining fish freshness post-bleeding.
Innovation Solution
A tubular instrument is inserted into the fish's circulatory system for injecting a pressurized injection liquid followed by a gas, such as hydrogen gas, to replace blood and inhibit oxidation, thereby enhancing freshness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional bleeding methods (cutting gills and/or caudal fins) are used to drain blood from fish, then the bleeding process is simple and quick, but blood remains in the blood vessel system and cannot be completely removed
Solution Approach 1:
The patent uses pressurized gas (pneumatic method) or pressurized liquid (hydraulic method) injected through a tubular instrument into the fish's circulatory system to force blood out through the gills. This pneumatic/hydraulic approach completely removes blood from the blood vessel system while maintaining operational simplicity, resolving the contradiction between ease of manufacture and reliability of blood removal.
2Reliability
If injection liquid containing fine bubbles is injected into the circulatory system to remove blood, then blood removal reliability is improved, but the complexity of the treatment process increases
Solution Approach 1:
The patent extracts the blood removal function from the complex injection liquid system and achieves it through simple pressurized gas or liquid injection. By taking out the essential function (pressure-driven blood removal) from the complex fine bubble injection system, the patent maintains high reliability of blood removal while significantly reducing device complexity.
3Reliability
If gas for freshness preservation is injected into the circulatory system to suppress oxidation, then fish freshness is improved, but the complexity of the treatment process increases
Solution Approach 1:
The patent merges the blood removal function and freshness preservation function into a single integrated gas injection process. By combining these two functions into one step using the same tubular instrument and pressurized gas system, the patent achieves both complete blood removal and oxidation suppression without increasing overall process complexity.
4Reliability
If both injection liquid and gas are injected sequentially to remove blood and preserve freshness, then overall freshness maintenance is improved, but the treatment time and process complexity increase
Solution Approach 1:
The patent segments the treatment into two distinct methods: a one-step method using only pressurized gas, and a two-step method using pressurized liquid followed by pressurized gas. This segmentation allows users to choose the appropriate level of treatment based on their needs, optimizing the balance between freshness maintenance and treatment time without forcing unnecessary complexity on all applications.
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 method effectively removes blood and maintains fish freshness by suppressing oxidation, as demonstrated by lower K-values and improved sensory qualities over 10 days post-treatment.
Implementation Method 1
suppressing oxidation of the fish's internal tissues and lowering the K value
Implementation Method 2
injecting gas for freshness preservation into the circulatory system of the fish through the tubular instrument
Data Source
AI summary
A fish bleeding treatment method includes an insertion step of inserting a tubular instrument, which is a member in a tubular shape, into a circulatory system of a fish; and a gas press injection step of injecting gas for freshness preservation into the circulatory system of the fish through the tubular instrument inserted in the insertion step.