MRI Cooling Control with Variable-Speed Refrigeration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing MRI cooling systems consume large amounts of energy and experience instability due to fluctuations in cooling water temperature, especially when switching between high-load and low-load operations.
Innovation Solution
A cooling device and method that utilize a regulation unit to adjust the rotation speed of motive power components based on pre-collected cooling power demands, using a frequency converter to optimize the refrigeration cycle and maintain precise temperature control through a closed-loop system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the compressor, pump and fan are operated continuously in the existing cooling device, then the MRI system can be cooled, but the energy consumption is quite large
Solution Approach 1:
The patent applies dynamics by making the rotation speeds of the compressor, pump, and fan adjustable rather than fixed. The frequency converter dynamically adjusts the rotation speeds of these components based on the MRI system's operational state and cooling power demand, allowing the cooling device to adapt its energy consumption to actual cooling needs while maintaining effective cooling capability.
2Adaptability or versatility
If the existing cooling device is used for MRI systems that switch between high-load and low-load operation, then the MRI system can operate flexibly, but the water supply temperature experiences large fluctuations affecting stability
Solution Approach 1:
The patent implements feedback control by collecting cooling power demand information from the MRI system's operational state and using this feedback to adjust the rotation speeds of the compressor, pump, and fan. The regulation unit processes the cooling power demand and sends regulation signals to the frequency converter, which adjusts the component speeds to maintain stable water supply temperature despite fluctuations in MRI system load.
3Use of energy by moving object
If the rotation speeds of motive power components are adjusted based on cooling power demand, then energy consumption is reduced and temperature stability is improved, but the device complexity increases due to the regulation unit and frequency converter
Solution Approach 1:
The patent applies universality by designing the regulation unit to perform multiple functions: collecting cooling power demand information, processing the collected information, determining appropriate rotation speeds, and sending regulation signals to the frequency converter. This multi-functional approach consolidates control logic into a single unit, reducing overall system complexity while achieving energy optimization and temperature stability.
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 reduces energy consumption and stabilizes cooling liquid temperature fluctuations, enabling more efficient and precise cooling of MRI systems by dynamically adjusting power usage according to the system's operational state.
Implementation Method 1
the cooling water is sent into an evaporator 8 and undergoes heat exchange with a refrigerant in the evaporator, experiences a drop in temperature
Implementation Method 2
the refrigerant is compressed to form a vapor at high temperature and high pressure in the compressor 5
Implementation Method 3
the vapor releases heat to a cooling medium, condensing to form a high-pressure liquid in the condenser 10
Implementation Method 4
a first pump 4 supplies cooling water at a low temperature to a pipeline for cooling an MRI device M, to absorb heat generated during operation of the MRI device
Data Source
AI summary
A cooling device is provided for an MRI system. A regulation unit for driving a refrigerant to subject the MRI system to a refrigeration cycle is based on a pre-collected cooling power demand of the MRI system in at least one state. By way of the cooling device and cooling method, the amount of energy needed to cool the MRI device is reduced.