US 12,188,704 B2
Cooling system and laboratory instrument having a cooling system
Daniel Langer, Osterode (DE); and Kai Peitzberg, Osterode (DE)
Assigned to Thermo Electron LED GmbH, Langenselbold (DE)
Filed by Thermo Electron LED GmbH, Langenselbold (DE)
Filed on Sep. 28, 2022, as Appl. No. 17/936,108.
Prior Publication US 2023/0145691 A1, May 11, 2023
Int. Cl. F25B 9/10 (2006.01); B04B 15/02 (2006.01); F25B 9/00 (2006.01); F25B 41/33 (2021.01); F25B 43/00 (2006.01)
CPC F25B 9/10 (2013.01) [B04B 15/02 (2013.01); F25B 9/008 (2013.01); F25B 41/33 (2021.01); F25B 43/006 (2013.01); F25B 2313/001 (2013.01); F25B 2400/23 (2013.01); F25B 2600/2513 (2013.01); F25B 2700/21175 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A laboratory instrument having a cooling system, wherein the cooling system comprises:
a refrigerant, the refrigerant comprising carbon dioxide;
an evaporator;
a first compressor, the first compressor designed to compress the refrigerant from a primary pressure range to a secondary pressure range;
a second compressor, the second compressor designed to compress the refrigerant from the secondary pressure range to a tertiary pressure range,
the first compressor and the second compressor being arranged in series with one another;
a cooling component;
an expansion device;
a line system that connects the evaporator, the first compressor, the second compressor, the cooling component and the expansion device to one another; and
a circuit control that is designed to control a flow of the refrigerant,
wherein the circuit control is designed to open the expansion device on the basis of a pressure of the refrigerant and, depending on a degree of opening of the expansion device, expansion of the refrigerant downstream of the expansion device is controlled, and
wherein the circuit control is designed to control the expansion device as a function of an outlet temperature of the cooling component and/or an ambient temperature in order to set a pressure in the tertiary pressure range.