Removable Flow Passage Unit for Rapid Fluid Change
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Solution Overview
Problem
Existing pressure sensors with integrated flow passages are inefficient and unsafe for rapid fluid changes, particularly in medical applications, as they require lengthy washing and may not completely remove residual liquids.
Innovation Solution
A pressure detecting device with a removably mounted flow passage unit, utilizing a mounting mechanism that aligns positioning features to ensure proper orientation and contact between pressure detecting and transmitting surfaces, eliminating the need for washing and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the flow passage is integrated with the pressure detecting unit, then the device structure is simplified, but the flow passage cannot be completely sanitized and requires lengthy washing operations
Solution Approach 1:
The flow passage unit is divided from the pressure detecting unit into a separate, removable component. This segmentation allows the flow passage unit to be completely removed for sterilization or replacement, ensuring complete sanitization while maintaining a relatively simple overall device structure through modular design.
2Device complexity
If the flow passage is integrated with the pressure detecting unit, then the device structure is simplified, but the operation time for changing fluid increases due to washing requirements
Solution Approach 1:
By segmenting the flow passage unit as a removable component, the system eliminates the time-consuming washing operation. The flow passage unit can be quickly removed and replaced with a sterilized unit, dramatically reducing the time required for fluid changes while keeping the device structure simple through modular architecture.
Solution Approach 2:
The flow passage unit can be designed as a disposable or frequently replaceable component. After use, it is discarded or sterilized externally, and a new unit is mounted on the pressure detecting unit. This approach eliminates washing time and ensures complete sanitization, with the simple device structure maintained through standardized mounting interfaces.
3Productivity
If the flow passage unit is removably mounted, then the rapidity of fluid changes is improved, but the device complexity increases due to mounting mechanism
Solution Approach 1:
The mounting mechanism is designed as a simple, standardized interface that separates the flow passage unit from the pressure detecting unit. This segmentation enables rapid attachment and detachment operations while keeping the mounting mechanism itself simple and easy to manufacture, thus improving productivity without excessive complexity increase.
4Ease of operation
If positioning portions are added for alignment, then the connectivity with tubes is improved, but the device complexity increases
Solution Approach 1:
The positioning portions are designed with asymmetric features that provide unique alignment orientation. This ensures that the flow passage unit can only be mounted in the correct orientation, improving tube connectivity and ensuring proper alignment of the flow passage with the pressure detecting surface. The asymmetric design is simple and does not significantly increase device complexity.
Data Source
AI summary
To improve connectivity with tubes to be connected to an inlet and an outlet of a flow passage, while increasing the rapidity of an operation of changing a fluid to be passed through the flow passage and also increasing the safety. Provided is a pressure detecting device including a pressure detecting unit detecting a pressure transmitted to a diaphragm, a flow passage unit having a diaphragm for transmitting a pressure of a fluid flowing through the flow passage to the diaphragm, and a nut for removably mounting the flow passage unit onto the pressure detecting unit. The nut mounts the flow passage unit onto the pressure detecting unit when a position of a positioning groove of the pressure detecting unit about an axis coincides with a position of a positioning projection of the flow passage unit about an axis.