Pump with Variable Volume Cleaning Chamber
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Solution Overview
Problem
Existing coating devices face issues with air bubble generation and fluid quality due to fluid adhering to the sides of pump rods solidifying and mixing into the fluid, leading to decreased discharge responsiveness and constant flow rate.
Innovation Solution
A pump design with a variable volume cleaning chamber and a rod configuration that prevents exposure to outside air, using a stretchable portion and flanges to maintain fluid cleanliness and prevent air bubbles, ensuring the rod is not exposed to the outside environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rod is reciprocated in a storage chamber to supply fluid, then discharge responsiveness and constant flow rate are improved, but air bubbles are generated and fluid quality deteriorates
Solution Approach 1:
The storage chamber is divided into a first storage chamber and a second storage chamber separated by a partition wall. The rod is configured to reciprocate only within the first storage chamber, preventing exposure of fluid in the second chamber to outside air. This segmentation isolates the fluid supply path from air contamination while maintaining discharge performance.
Solution Approach 2:
A cleaning chamber is introduced as an intermediary component between the rod and the storage chamber. The rod reciprocates through the cleaning chamber which contains cleaning fluid, preventing direct contact between the rod and outside air. This intermediary structure eliminates air bubble generation while preserving the rod's fluid supply function.
2Reliability
If a cleaning chamber is provided to prevent air bubble generation, then fluid quality is improved, but device complexity increases
Solution Approach 1:
The cleaning chamber and storage chamber are merged into a single integrated pump body structure. The partition wall divides the storage function while the cleaning chamber handles the cleaning function, but both are combined in one compact unit. This merging achieves fluid quality improvement without proportionally increasing overall device complexity.
Solution Approach 2:
The cleaning chamber serves multiple functions: it prevents air bubble generation during rod reciprocation, provides a sealed environment for the rod, and maintains fluid quality. By making the cleaning chamber multi-functional, the patent reduces the need for additional separate components, thereby limiting the increase in device complexity.
Data Source
AI summary
According to one embodiment, a pump includes a first chamber configured to store a first fluid. The pump includes a second chamber configured to store a second fluid, the second chamber being positioned on a side of the first chamber. Volume of a space of the second chamber configured to store the second fluid is variable. The pump includes an elongated member having a first end portion and a second end portion, the first end portion provided in the second chamber and the second end portion provided in the first chamber.