Switching Unit With Single Insulating Liquid Cooling Circuit
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Solution Overview
Problem
Existing switching devices with separate cooling and insulating liquids face issues with leaks causing severe consequences and increased maintenance complexity, as different liquids can mix and cause damage, necessitating immediate shutdown and dual liquid exchange.
Innovation Solution
A switching device with a hydraulic connection between the cooling circuit and housing using a single insulating liquid for both cooling and insulation, allowing for easier maintenance and reduced impact from leaks, as the same liquid is used throughout the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate cooling liquid and insulating liquid are used, then cooling efficiency is improved, but maintenance complexity increases and leak consequences worsen
Solution Approach 1:
The patent combines the cooling liquid and insulating liquid into a single fluid system. The insulating liquid serves dual functions: it provides electrical insulation for the switching elements and simultaneously acts as the cooling medium circulated through cooling channels. This eliminates the need for separate cooling and insulation systems, reducing maintenance complexity while maintaining effective cooling and insulation performance.
Solution Approach 2:
The insulating liquid is designed to perform multiple functions simultaneously: electrical insulation, heat transfer for cooling, and lubrication for moving parts. This multi-functional approach consolidates what would otherwise require separate systems, simplifying the overall device structure and reducing maintenance requirements while achieving both effective cooling and insulation.
2Temperature
If separate cooling liquid and insulating liquid are used, then cooling performance is improved, but reliability decreases due to leak consequences
Solution Approach 1:
By merging the cooling and insulation functions into a single liquid system, the patent eliminates the risk of harmful interactions between different liquids in case of leaks. Since only one insulating liquid is used throughout the system, any leakage does not create mixing issues or chemical incompatibility problems, thereby maintaining system reliability while achieving effective cooling performance.
Solution Approach 2:
The patent converts the potential harm of leaks into a benign situation by using a single compatible liquid throughout. What would normally be a harmful event (liquid leakage and mixing) becomes insignificant because the same insulating liquid is used in both the insulation chamber and cooling circuit, eliminating the risk of damaging chemical reactions or performance degradation from liquid mixing.
3Ease of repair
If hydraulic connection between cooling circuit and housing is implemented, then maintenance ease is improved, but risk of liquid mixing increases
Solution Approach 1:
The hydraulic connection between the cooling circuit and housing is made possible because the same insulating liquid is used in both regions. This merging of fluid systems allows for simplified maintenance where only one liquid needs to be managed and replaced, while simultaneously eliminating the liquid mixing risk that would otherwise exist at the connection interface.
Solution Approach 2:
The use of homogeneous insulating liquid throughout the entire system (in both the housing insulation region and the cooling circuit) creates compatibility at all interfaces and connections. This homogeneity ensures that hydraulic connections do not create harmful mixing issues, as the liquids on both sides of any connection are identical, while still allowing for easy maintenance through simplified liquid management.
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 simplifies cooling and maintenance by using a single insulating liquid for both functions, minimizing the impact of leaks and eliminating the need for immediate shutdown, while maintaining effective cooling and insulation within the switching device.
Implementation Method 1
a cooling circuit which has a pump, cooling channels and a heat exchanger, the interior of the housing and the cooling circuit being hydraulically connected to one another in such a way that the insulating liquid is used both in the cooling circuit for cooling the switching module
Implementation Method 2
a cooling circuit which has a pump, cooling channels and a heat exchanger
Implementation Method 3
an insulating liquid inside the housing surrounding the switching module
Implementation Method 4
a cooling circuit which has a pump, cooling channels and a heat exchanger
Data Source
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AI summary
The invention relates to a switching unit comprising a switching module and a cooling channel. The switching unit (1) comprises a housing (2); a switching module (3, 3', 3''), which is arranged in the interior of the housing (2) and has a switching element (4) and a cooling channel (5); an insulating liquid (6) in the interior of the housing (2), which surrounds the switching module (3, 3', 3''); and a cooling circuit (7), which has a pump (8), the cooling channel (5) and a heat exchanger (10); the interior of the housing (2) and the cooling circuit (7) being hydraulically connected to each other.