Deformable Pressure Vessel for Stable Dialysis Solution Mixing
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Solution Overview
Problem
Existing pressure-controlled methods for preparing dialysis solutions in rigid containers within closed hydraulic systems risk damaging downstream equipment due to excessive pressure changes and mixing errors.
Innovation Solution
A pressure vessel with a deformable member, elastic biasing means, and air detection system that allows for variable chamber volume and air expulsion, ensuring stable pressure and preventing mixing errors by maintaining a predetermined pressure range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pressure vessel is disassembled into multiple parts for cleaning, then cleaning accessibility is improved, but device complexity increases
Solution Approach 1:
The pressure vessel is divided into a vessel body and a lid that can be separated from each other. The lid can be rotated relative to the vessel body and disassembled completely for thorough cleaning of all surfaces including the sealing surface, while maintaining a relatively simple overall structure with only two main separable components.
2Reliability
If a pressure vessel operates at high pressure, then sterilization effectiveness is improved, but safety risks increase
Solution Approach 1:
A safety valve is pre-installed on the pressure vessel that automatically releases pressure when it exceeds a predetermined safe level. This preventive measure cushions against the harmful effects of excessive pressure before they can cause damage, allowing the vessel to operate effectively at high pressures for sterilization while maintaining safety.
3Productivity
If liquid is injected quickly into the pressure vessel, then productivity is improved, but mixing homogeneity deteriorates
Solution Approach 1:
The lid is designed to rotate relative to the vessel body during the liquid injection process. This periodic rotational motion distributes the incoming liquid flow more evenly throughout the vessel interior, improving mixing homogeneity while allowing rapid injection to maintain high productivity.
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 enables a stable and controlled liquid mixing process, preventing equipment damage and ensuring accurate solution preparation by maintaining a consistent pressure and expelling air, thus ensuring a desired solution concentration is achieved.
Implementation Method 1
an elastic biasing means (14) configured to interact with the deformable member (111) so that a volume of the chamber (11) is variable
Implementation Method 2
an air detection means (15) configured to detect the presence of air within the chamber (11)
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A pressure vessel (1) for liquid mixing, comprising: a housing (16); a deformable member (111) configured to define a chamber (11) in combination with at least one portion of the housing (16); an inlet port (12) fluidly communicated with the chamber (11); an outlet port (13) fluidly communicated with the chamber (11); an elastic biasing means (14) configured to interact with the deformable member (111) to make a volume of the chamber (11) variable; and an air detection means (15) configured to detect the presence of air within the chamber (11). Also disclosed are a liquid mixing equipment, a liquid mixing system (2), a method for preparing a solution, a corresponding control system and a corresponding computer readable program carrier. According to the present disclosure, the solution pump can draw the solution in a substantially constant flow toward the mixing chamber and can operate at a relatively stable pressure.