Refrigerating method and refrigerating device with combinatoin of magnetic refrigeration and regenerative gas refrigeration

Abstract

The present invention provides a refrigeration method combining magnetic refrigeration and gas-based regenerative refrigeration, the method comprises: replacing part of or all of regenerators ( 2 ) in a gas-based regenerative refrigerator with magnetic regenerators ( 2 ), wherein part of or all of fillers in the magnetic regenerators ( 2 ) are magnetic refrigeration materials to form magnetic regenerators ( 2 ) with the same operating temperature ranges as that of the corresponding regenerators in the gas-based regenerative refrigerator; disposing the magnetic regenerators ( 2 ) respectively in magnet assemblies ( 4 ) for generating controllable and periodically-changing field strength, and performing coupling control on working sequence of the gas-base regenerative regenerator and magnetic field changing sequence of the magnet assemblies to realize combination of magnetic refrigeration and gas-based regenerative refrigeration. And an apparatus combining magnetic refrigeration and gas-based regenerative refrigeration is also provided, which comprises: a pressure wave generator ( 1 ), m regenerators ( 2 ), m phase difference adjusting mechanism ( 3 ), j magnet assemblies ( 4 ) for generating controllable and changeable field strength and a coupling control system ( 5 ), wherein m is an integer between 1 and 5, and j<=m.

What is claimed is: 
     
         1 . A refrigeration method combining magnetic refrigeration and gas-based regenerative refrigeration, comprising: replacing part of or all of regenerators in a gas-based regenerative refrigerator with magnetic regenerators, wherein part of or all of fillers in the magnetic regenerators are magnetic refrigeration materials to form magnetic regenerators with the same operating temperature ranges as that of the corresponding regenerators in the gas-based regenerative refrigerator; disposing the magnetic regenerators respectively in magnet assemblies for generating controllable and periodically-changing field strength, and performing coupling control on working sequence of the gas-based regenerative refrigerator and magnetic field changing sequence of the magnet assemblies for generating controllable and changeable field strength, to realize combination of magnetic refrigeration and gas-based regenerative refrigeration. 
     
     
         2 . A refrigeration apparatus combining magnetic refrigeration and gas-based regenerative refrigeration comprising a pressure wave generator ( 1 ), m regenerators, m phase difference adjusting mechanism, j magnet assemblies for generating controllable and changeable field strength and a coupling control system ( 5 ) for performing coupling control on working sequence of a gas-based regenerative refrigerator and magnetic field changing sequence; wherein m is an integer between 1 and 5, and j<=m; part of or all of the m regenerators are magnetic regenerators; and part of or all of fillers in the magnetic regenerators are magnetic refrigeration materials; magnetic refrigeration temperature ranges of the magnetic refrigeration materials in the magnetic regenerators are the same as the corresponding temperature ranges of locations of the magnetic regenerators in the gas-based regenerative refrigerator; and the components are connected in the following manner: the pressure wave generator ( 1 ) is connected via a fluid flow pipe with one end of a first stage gas-based regenerative refrigerator consisting of a first stage regenerator ( 2   1 ) and a first stage phase difference adjusting mechanism ( 3   1 ) for adjusting phase difference between pressure wave and mass flow rate; and the other end of the first stage gas-based regenerative refrigerator is connected with one end of a lower stage gas-based regenerative refrigerator via a fluid flow pipe, and so on until the last stage; the magnetic regenerators are respectively disposed in the corresponding magnet assemblies for generating controllable and periodically-changing field strength; and the coupling control system ( 5 ) for performing coupling control on working sequence of the gas-based regenerative refrigerator and magnetic field changing sequence is respectively connected with the pressure wave generator ( 1 ), phase difference adjusting mechanism and magnet assemblies for generating controllable and changeable field strength via a signal transmission cable and/or pipe and/or mechanical device;
 input signals of the coupling control system ( 5 ) are characteristic parameters of the working sequence of the pressure wave generator ( 1 ) and/or characteristic parameters of the working sequence of respective phase difference adjusting mechanisms; and output signals of the coupling control system ( 5 ) are signals for controlling the magnet assemblies for generating controllable and changeable field strength.   
     
     
         3 . The refrigeration apparatus according to  claim 2 , wherein the gas-based regenerative refrigerator is a Stirling refrigerator, Vuilleumier (VM) refrigerator, Gifford-McMahon (G-M) refrigerator, Solvay (SV) refrigerator, pulse tube refrigerator or thermoacoustic refrigerator. 
     
     
         4 . The refrigeration apparatus according to  claim 2 , wherein the magnet assemblies generate controllable and changeable field strength based on superimposition of magnetic vectors through relative movement of two permanent magnets. 
     
     
         5 . The refrigeration apparatus according to  claim 2 , wherein the refrigeration apparatus is a combined composite refrigeration system of magnetic refrigeration and gas-based regenerative refrigeration, which is formed by combining i identical refrigeration apparatuses combining magnetic refrigeration and gas-based regenerative refrigeration according to working sequence phase angle differences θ; wherein the working sequence phase angle differences θ are identical and equal to 360°/i or different from each other.