Electric Pump Air Bleeding Control for Cooling Circuits
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Solution Overview
Problem
Conventional cooling apparatuses face inefficiencies in air bleeding from cooling circuits due to varying air flow resistance sections, leading to prolonged air collection times during coolant changes.
Innovation Solution
A cooling apparatus with an electric pump and control section that switches between normal and air bleeding modes, varying pump displacement to efficiently collect stagnant air from different resistance sections into an air bleeding portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the coolant displacement of the pump is determined according to air in sections of low resistance to air flow, then air in low resistance sections can be efficiently collected, but stagnant air in sections of high resistance to air flow cannot flow smoothly to the air bleeding portion
Solution Approach 1:
The pump's coolant displacement is made dynamically adjustable through multiple displacement modes (first, second, and third modes) rather than being fixed. The control unit switches between these modes based on air bleeding progress, allowing the system to adapt to varying air flow resistance conditions throughout the cooling circuit.
Solution Approach 2:
The pump displacement parameter is changed across different operating modes. In the first mode, a first displacement value is used for initial air collection; in the second mode, a second displacement value (different from the first) is used for continued air removal; and in the third mode, a third displacement value is applied for final air bleeding, optimizing performance across different resistance conditions.
2Productivity
If the coolant displacement of the pump is determined according to air in sections of high resistance to air flow, then stagnant air in high resistance sections can flow to the air bleeding portion, but air in sections of low resistance to air flow is diffused in the coolant as bubbles
Solution Approach 1:
The system dynamically adjusts pump displacement based on the stage of air bleeding. By switching between different displacement modes, the system prevents air diffusion in low resistance sections while ensuring complete air removal from high resistance sections, maintaining both reliability and productivity.
Solution Approach 2:
The pump operates in periodic cycles, alternating between different displacement modes. This periodic action allows the system to methodically address air in different sections of the cooling circuit, preventing air diffusion while ensuring complete air removal through repeated cycles of adjusted displacement.
3Device complexity
If a fixed pump displacement is used for air bleeding, then the pump structure remains simple, but it takes longer time to collect air from all sections of the cooling circuit
Solution Approach 1:
The pump control system is made dynamic with multiple displacement modes that can be switched based on air bleeding progress. This dynamic control, while increasing complexity, dramatically reduces air bleeding time by optimizing coolant flow for different air resistance conditions throughout the cooling circuit.
Solution Approach 2:
The control unit implements periodic switching between different pump displacement modes during the air bleeding process. This periodic action systematically addresses air in various cooling circuit sections, reducing overall air bleeding time despite the added control complexity.
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
This approach significantly reduces air bleeding time by optimizing coolant flow patterns, ensuring efficient air collection and discharge from the cooling circuit.
Implementation Method 1
The electric pump 3 is operated to circulate coolant within the cooling circuit 2
Implementation Method 2
a cooling apparatus for cooling a subject of cooling, which is a heat source, with coolant
Data Source
AI summary
A cooling apparatus that cools with coolant a subject of cooling, which is a heat source. The cooling apparatus includes a cooling circuit, an electric pump, a switching section, and a control section. Through circulation of the coolant, air in the cooing circuit is caused to flow to an air bleeding portion and is discharged from the cooling circuit through the air bleeding portion. The switching section is capable of switching the operation mode of the electric pump between a normal mode and an air bleeding mode for collecting air in the cooling circuit to the air bleeding portion. During the air bleeding mode, the control section is capable of controlling the electric pump to change a coolant displacement from the electric pump according to a change pattern that allows stagnant air in sections of the cooling circuit to flow to the air bleeding portion.