US2012227418A1PendingUtilityA1

Cooling unit

39
Assignee: DECKER LUTZPriority: Mar 8, 2011Filed: Mar 7, 2012Published: Sep 13, 2012
Est. expiryMar 8, 2031(~4.6 yrs left)· nominal 20-yr term from priority
Inventors:Lutz Decker
F25B 9/002
39
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Claims

Abstract

The invention relates to a cooling unit for cooling a load having a refrigeration circuit, at least one compressor for compressing a refrigerant that circulates in the refrigeration circuit, several heat exchangers, in which the refrigerant is cooled against itself, and two expansion devices that operate at different temperature levels, in which, at least temporarily, at least one partial stream of the refrigerant is expanded to produce cold. At least one additional expansion device is provided. The latter is connected to the refrigeration circuit in such a way that the refrigerant that can be, at least temporarily, at least partially expanded in the additional expansion device to produce cold.

Claims

exact text as granted — not AI-modified
1 . A cooling unit for cooling a load, said cooling unit comprising a refrigeration circuit, which comprises:
 at least one compressor which compresses the refrigerant that circulates in the refrigeration circuit,   a plurality of heat exchangers (HX 1 -HX 6 ), wherein the refrigerant is cooled against itself, and   two expansion devices (TU 1 , TU 2 ) that operate at different temperature levels, in which, at least temporarily, at least one partial stream of the refrigerant is expanded to produce cold, and   at least one additional expansion device (TU 3 ) is connected to the refrigeration circuit in such a way that the refrigerant that circulates in the refrigeration circuit, after the load is cooled, can be, at least temporarily, at least partially expanded in the additional expansion device (TU 3 ) to produce cold.   
     
     
         2 . A method for operating a cooling unit according to  claim 1 , wherein, during the cooling and/or heating procedure, the compressor mass flow is divided into partial streams and sent to the three expansion devices (TU 1 , TU 2 , TU 3 ) in such a way that essentially at any time, the entire compressor mass flow serves to cool the load that is to be cooled. 
     
     
         3 . A method according to  claim 2 , wherein the cooling unit is used to cool a cryogenic load. 
     
     
         4 . A method according to  claim 3 , wherein the cooling unit is used to cool a superconducting magnet.

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