Vortex-Flow Blower Thermal Fuse for Impeller Locking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In secondary air supply systems, electric air pumps can experience thermal issues leading to impeller locking and bursting due to high temperatures when the discharge side is closed for an extended period, causing the impeller to contact and break the resin blower housing, resulting in potential damage and safety hazards.
Innovation Solution
Incorporating a thermal fuse within the blower housing, which is designed to fuse and open at elevated temperatures, allowing discharge fluid to escape and reducing pressure, thereby preventing impeller locking and bursting, and maintaining the blower housing integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the electric air pump operates for a long time with closed discharge side, then the internal temperature of the blower housing rises beyond normal range, but the impeller remains intact initially
Solution Approach 1:
The thermal fuse is pre-installed in the blower housing at a position where it will be exposed to high temperature when the discharge side is closed. Before the impeller can be damaged by thermal expansion and contact with the partitioning portion, the thermal fuse proactively melts to open the discharge port, releasing the high temperature and pressure. This preliminary protective action prevents the subsequent damage to the impeller.
2Reliability
If the impeller is thermally expanded by high temperature air, then the impeller contacts the partitioning portion, but the thermal fuse prevents this by opening the discharge port
Solution Approach 1:
The thermal fuse acts as an intermediary protective element between the high temperature environment and the impeller. When the discharge side is closed and temperature rises, the thermal fuse melts first, serving as a sacrificial component that opens the discharge port. This intermediary action relieves the temperature and pressure buildup before it can affect the impeller, preventing thermal expansion and contact with the partitioning portion.
3Reliability
If the resin in the partitioning portion melts and gets caught in the impeller, then the impeller is locked and may burst, but the thermal fuse prevents this by opening the discharge port first
Solution Approach 1:
The thermal fuse provides preliminary anti-action by opening the discharge port before the resin in the partitioning portion can melt and cause impeller locking. When the discharge side is closed and temperature rises, the thermal fuse melts first, creating an open discharge path that prevents pressure buildup. This preliminary protective action counteracts the potential harmful effect of resin melting and impeller locking before it can occur.
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 thermal fuse effectively controls temperature rise, prevents impeller thermal expansion, and avoids impeller bursting, ensuring the blower housing remains intact by reducing discharge load and maintaining safe operational temperatures.
Implementation Method 1
the thermal fuse is fused by a temperature rise so as to discharge the fluid on the side of the discharge port to an outside
Implementation Method 2
the impeller 101 is thermally expanded by high-temperature air and the impeller 101 is brought into contact with the partitioning portion 103
Data Source
AI summary
A vortex-flow blower device includes an impeller having a plurality of fins, a blower housing that has a vortex flow chamber for accommodating the impeller and extends from a start point on a side of a the fluid inlet port to an end point on a side of a fluid discharge port along the plurality of fins, a partitioning portion that blocks a communication between the end point and the start point in the vortex flow chamber, and a thermal fuse that is provided in the blower housing. The thermal fuse can be fused by a temperature rise so as to discharge the fluid on the side of the fluid discharge port to an outside, or communicate with the side of the fluid discharge port to the side of the fluid inlet port in the vortex flow chamber when the thermal fuse is fused.