Rotary Magnetic Refrigerator Synchronization for Room-Temperature Cooling
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Solution Overview
Problem
Current refrigeration technologies, such as vapor compression cycles, cause environmental disruption due to chlorofluorocarbon emissions, and magnetic refrigeration systems face challenges in achieving efficient cooling in the room temperature range with complex structures and insufficient cooling capacity.
Innovation Solution
A magnetic refrigerator design that circulates a refrigerant between an external cooling section and a heat radiating section, using magnetic particles with a magnetocaloric effect, a rotary drive, a magnetic field generator, and a refrigerant pump, synchronized to apply and eliminate magnetic fields, optimizing refrigerant supply and discharge for efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If magnetic refrigeration is used to achieve eco-friendly cooling, then environmental protection is improved, but system complexity and structure become problematic
Solution Approach 1:
The magnetic refrigerator is divided into multiple independent heat exchangers (first, second, third, fourth) arranged in a cyclic configuration. Each heat exchanger handles specific thermal exchange tasks, allowing the system to achieve complex refrigeration functions through modular, simplified units rather than a monolithic complex structure.
Solution Approach 2:
The patent combines the magnetic field generation function with the heat exchanger structure by integrating permanent magnets directly into the heat exchanger assemblies. This merging eliminates the need for separate electromagnetic actuators and control systems, reducing overall system complexity while maintaining eco-friendly operation.
2Use of energy by moving object
If magnetic particles with magnetocaloric effect are used, then refrigeration efficiency is improved, but cooling capacity becomes insufficient
Solution Approach 1:
The patent employs asymmetric arrangement of heat exchangers with different thermal characteristics. The first and second heat exchangers have different configurations from the third and fourth, allowing optimization of heat transfer surfaces and magnetic particle distribution to simultaneously enhance efficiency and total cooling capacity through cumulative effect of multiple units.
Solution Approach 2:
The system transitions from a single-stage magnetic refrigeration approach to a multi-stage cyclic arrangement where heat exchangers are positioned at different spatial locations and operational phases. This dimensional expansion allows the system to accumulate cooling capacity across multiple stages while maintaining high efficiency at each stage through optimized magnetic field application.
3Use of energy by stationary object
If synchronized magnetic field application and refrigerant circulation are implemented, then power consumption is reduced, but control precision requirements increase
Solution Approach 1:
The system uses permanent magnets that automatically generate magnetic fields without requiring external power supply or complex control electronics. The magnetic field application and refrigerant circulation are synchronized through the mechanical rotation of the heat exchangers themselves, which naturally bring magnetic particles into position with the refrigerant flow, eliminating the need for precision electronic control systems.
Solution Approach 2:
The magnetic refrigerator operates on periodic cycles where heat exchangers rotate through different positions, alternately exposing magnetic particles to refrigerant flow at optimized intervals. This periodic operation naturally synchronizes magnetic field application with refrigerant circulation through the rotational mechanics, reducing power consumption while avoiding complex real-time control requirements through inherent mechanical timing.
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 design enhances refrigeration efficiency (COP) by synchronizing magnetic field application with refrigerant circulation, reduces power consumption, and simplifies the system structure, achieving effective cooling in the room temperature range while minimizing environmental impact.
Implementation Method 1
magnetic particles having a magnetocaloric effect
Data Source
AI summary
A magnetic refrigerator has a housing, heat exchangers filled with magnetic particles having a magnetocaloric effect, a rotary drive, a rotating shaft, a magnetic field generator fixed to the rotating shaft which applies a magnetic field to or eliminates a magnetic field from the magnetic particles in the heat exchangers following rotation of the rotating shaft, a refrigerant pump which circulates the refrigerant following rotation of the rotating shaft, a rotary refrigerant control valve which controls supply of the refrigerant to and discharge of the refrigerant from the heat exchangers following rotation of the rotating shaft, and a refrigerant circuit. The magnetic field generator and the rotary refrigerant control valve are configured to synchronize application of the magnetic field to or elimination of the magnetic field from the magnetic particles with supply of the refrigerant to or discharge of the refrigerant from the heat exchangers.