Medical Heating Device with Pressure-Responsive Flow Blocking
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Solution Overview
Problem
Conventional medical heating apparatuses face issues with bubbles being discharged into the body due to positive pressure changes and potential air flowback into the body or backward fluid flow when the cartridge enters a negative pressure state, posing safety risks.
Innovation Solution
The medical heating apparatus incorporates an upper and lower cartridge plate design with fluid guide members, a heater, and an air filter system, along with a fluid flow blocking mechanism using extension units, film members, and discharge passages to maintain positive pressure during fluid supply and block fluid flow when the cartridge enters a negative pressure state, preventing external air from entering and backward fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cartridge is designed to allow fluid flow during heating, then the infusion solution or blood can be supplied to the patient, but air bubbles may be discharged into the body when pressure becomes positive and air may flow backward into the body when pressure becomes negative
Solution Approach 1:
The patent employs a flexible membrane that can dynamically change its state based on pressure conditions. When positive pressure occurs, the membrane allows air bubbles to pass through the air filter to the outside. When negative pressure occurs, the membrane automatically closes to prevent air from flowing backward into the patient's body, thus solving the safety issue while maintaining fluid supply capability
Solution Approach 2:
The patent introduces an air filter as an intermediary component between the heating chamber and the patient's body. This air filter serves as a mediator that allows air bubbles to be discharged safely when positive pressure occurs, while the flexible membrane acts as another intermediary that selectively opens or closes based on pressure conditions, preventing direct air entry into the patient's body
2Object-affected harmful factors
If the air filter unit is designed to discharge air bubbles to the outside, then bubbles generated during heating are removed, but the structure becomes more complex
Solution Approach 1:
The patent combines multiple functions into integrated components. The air filter is integrated directly into the cartridge structure, and the flexible membrane is incorporated into the same assembly, allowing both air bubble discharge and pressure-based flow control to be achieved within a single unified structure rather than separate components, thus reducing overall device complexity
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
Effectively prevents air bubbles from entering the body and ensures continuous fluid supply while blocking external air and backward fluid flow, even when the cartridge transitions to a negative pressure state, enhancing safety and reliability.
Implementation Method 1
a heater; a barrier member and a cover member disposed at a front side and a rear side of the heater, respectively and forming a fluid path that allows the fluid to be moved in a manner of surrounding the heater
Implementation Method 2
an air filter portion disposed on the fluid path and configured to remove an air
Implementation Method 3
means provided on fluid flow passages of the upper and lower plates of the cartridge that normally maintain a flow of the fluid in a positive pressure state, and block the moving passage of the fluid when negative pressure is generated within the cartridge
Data Source
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AI summary
Provided is a heating device for blocking flow of air if the inside of a cartridge enters a negative-pressure state upon discontinuing or completing supply of a transfusion infusion solution or blood being infused into a human body, the device including: a cartridge upper plate which is formed so as to have an inflow port and to have a fluid-guide member for guiding the flow of a fluid; a cartridge lower plate which is formed so as to have an outflow port so as to have another fluid-guide member positioned spaced apart from said fluid-guide member; a heater which is disposed between the cartridge upper plate and the lower plate and that heats the fluid being guided by means of the fluid-guide members; air filters which are positioned outside the fluid-guide members and that are adapted to discharge air bubbles that are generated in the heated fluid into the atmosphere; and means which are provided on the cartridge upper and lower plate fluid flow pathways, that keep the flow of fluid normal in the positive-pressure state and block the fluid movement pathway if a negative pressure occurs inside the cartridge.