Replaceable Pump Cassette Design for Leak-Safe Hot Swaps
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Solution Overview
Problem
Existing cooling systems for data centers face challenges in efficiently and reliably providing continuous cooling for electrical components, particularly in maintaining redundant pump capacity and ensuring leak-proof liquid connections during hot-swappable operations.
Innovation Solution
The introduction of a replaceable pump unit (RPU) with hot-swappable pump cassettes, featuring a cassette frame, locking mechanism, and fluid connection modules, which allows for secure and efficient installation and removal of pump cassettes within the cooling system, ensuring leak-proof connections and redundant operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If pump cassettes are made replaceable for maintenance purposes, then ease of repair is improved, but reliability deteriorates due to potential leakage during hot-swappable operations
Solution Approach 1:
The pump system is divided into a stationary RPU housing and replaceable pump cassettes, allowing the pump cassette to be segmented and removed for maintenance while the housing remains in place. This enables easy replacement of pump cassettes while maintaining system integrity through the housing's sealed connection interfaces.
Solution Approach 2:
The locking mechanism is designed to automatically seal fluid connections before the pump cassette is fully removed from the RPU. This preliminary sealing action prevents leakage during the hot-swap operation, maintaining reliability while enabling easy repair.
2Reliability
If multiple pump cassettes are provided for redundant operation, then reliability is improved, but device complexity increases
Solution Approach 1:
The RPU housing is designed with universal interfaces that can accommodate multiple identical pump cassettes, allowing the same housing to support redundant pump units. This multi-functionality enables reliable redundant operation without requiring separate complex systems for each pump, thereby managing device complexity.
3Reliability
If locking mechanisms are added to secure pump cassettes, then reliability is improved, but ease of operation deteriorates due to additional locking steps
Solution Approach 1:
The locking mechanism is merged with the connection module, combining the sealing and locking functions into a single integrated component. This allows the pump cassette to be securely locked and sealed simultaneously through one action, improving reliability without significantly complicating the operation.
Solution Approach 2:
The locking mechanism is designed to automatically engage and seal when the pump cassette is inserted into the RPU, eliminating the need for manual locking steps. This self-service feature maintains ease of operation while ensuring reliable securement of the pump cassette.
Data Source
AI summary
Systems and methods are provided for a high density liquid cooling unit to cool electrical components. A replaceable pump unit (RPU) can include a pump configured to provide fluid flow to cool the electrical components (e.g., via direct liquid cooling of the electrical components by the pumped fluid and air-to-liquid cooling of the pumped fluid via a heat exchanger in fluid communication with the RPU). The RPU can be configured to be operated with or satisfy one or more RPU performance characteristics.