Accumulator arrangement for storing a refrigerating medium, and method of operating such an accumulator arrangement

1. Accumulator arrangement for use in a cooling system designed for operation with a two-phase refrigerating medium, comprising:

an accumulator vessel with a receptacle for receiving a refrigerating medium;

a liquefier adapted to liquefy refrigerating medium to be received in the receptacle of the accumulator vessel before it is fed into the receptacle of the accumulator vessel, and which includes a refrigerating medium outlet for discharging refrigerating medium liquefied in the liquefier from the liquefier; and

a heat exchanger arranged in the receptacle of the accumulator vessel, and which includes a refrigerating medium inlet connected to the refrigerating medium outlet of the liquefier for feeding refrigerating medium liquefied in the liquefier into the heat exchanger, and a refrigerating medium outlet which opens into the receptacle of the accumulator vessel, for discharging refrigerating medium from the heat exchanger into the receptacle of the accumulator vessel.

2. Accumulator arrangement according to claim 1 , wherein the refrigerating medium outlet of the liquefier is arranged in the region of a sump of the liquefier, that the refrigerating medium outlet of the liquefier and the refrigerating medium inlet of the heat exchanger are arranged at the same height relative to each other, and/or that the refrigerating medium outlet of the heat exchanger is arranged above the refrigerating medium outlet of the liquefier.

3. Accumulator arrangement according to claim 1 , wherein the heat exchanger comprises a first section and a second section which is arranged downstream from the first section, the first section of the heat exchanger being arranged below the refrigerating medium outlet of the liquefier, so that refrigerating medium which is fed from the refrigerating medium outlet of the liquefier into the heat exchanger can flow through the first section of the heat exchanger in a first direction, driven by gravity, and the second section of the heat exchanger being positioned relative to the first section of the heat exchanger so that refrigerating medium can flow through it in a second direction opposite to the first direction.

4. Accumulator arrangement according to claim 1 , further comprising a further accumulator vessel with a receptacle for receiving a refrigerating medium, and a further heat exchanger which is arranged in the receptacle of the further accumulator vessel, wherein a refrigerating medium inlet of the further heat exchanger is connected to a sump of the accumulator vessel, and a refrigerating medium outlet of the further heat exchanger opens into the receptacle of the further accumulator vessel.

5. Accumulator arrangement according to claim 1 , further comprising a further accumulator vessel with a receptacle for receiving a refrigerating medium, and a further heat exchanger which is arranged in the receptacle of the further accumulator vessel, wherein a refrigerating medium inlet of the further heat exchanger is connected to the refrigerating medium outlet of the liquefier, a refrigerating medium outlet of the further heat exchanger is connected to the refrigerating medium inlet of the heat exchanger, and a sump of the accumulator vessel is connected to a sump of the further accumulator vessel, to transfer refrigerating medium received in the receptacle of the accumulator vessel out of the receptacle of the accumulator vessel into the receptacle of the further accumulator vessel.

6. Accumulator arrangement according to claim 1 , further comprising a further accumulator vessel with a receptacle for receiving a refrigerating medium, and a further heat exchanger which is arranged in the receptacle of the further accumulator vessel, wherein a refrigerating medium inlet of the further heat exchanger is connected to a further refrigerating medium outlet of the liquefier, and a refrigerating medium outlet of the further heat exchanger opens into the receptacle of the further accumulator vessel, in particular a sump of the accumulator vessel being connected to a sump of the further accumulator vessel, in order to transfer refrigerating medium received in the receptacle of the accumulator vessel from the receptacle of the accumulator vessel into the receptacle of the further accumulator vessel.

7. Accumulator arrangement according to claim 1 , further comprising a further accumulator vessel with a receptacle for receiving a refrigerating medium, and a further heat exchanger which is arranged in the receptacle of the further accumulator vessel, wherein a refrigerating medium inlet of the further heat exchanger is connected to the refrigerating medium outlet of the liquefier, and a refrigerating medium outlet of the further heat exchanger opens into the receptacle of the further accumulator vessel, the refrigerating medium inlet of the heat exchanger being connected to the further heat exchanger upstream from the refrigerating medium outlet of the further, heat exchanger, and the refrigerating medium outlet of the further heat exchanger being arranged below the refrigerating medium outlet of the heat exchanger.

8. Accumulator arrangement according to claim 1 , further comprising a further liquefier, which is adapted to liquefy refrigerating medium to be received in at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel before it is fed into at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel, and a refrigerating medium outlet which is connected directly at least one of to the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel, so as to discharge refrigerating medium liquefied in the further liquefier from the further liquefier into at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel.

9. Accumulator arrangement according to claim 1 , wherein at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel is connected via a vent pipe to an interior of the liquefier, and/or that at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel is connected via a recirculation conduit to an interior of the liquefier.

10. Accumulator arrangement according to claim 1 , wherein the heat exchanger includes, upstream from its refrigerating medium outlet, an opening, or multiple openings which open(s) into the receptacle of the accumulator vessel at different heights, and/or that the further heat exchanger has, upstream from its refrigerating medium outlet, an opening, or multiple openings which open(s) into the receptacle of the further accumulator vessel at different heights.

11. Method for operating an accumulator arrangement suitable for use in a cooling system designed for operation with a two-phase refrigerating medium, comprising:

liquefying refrigerating medium which is to be received in a receptacle of an accumulator vessel in a liquefier;

feeding refrigerating medium liquefied in the liquefier through a refrigerating medium outlet of the liquefier into a heat exchanger which is arranged in the receptacle of the accumulator vessel; and

discharging the refrigerating medium from the heat exchanger into the receptacle of the accumulator vessel through a refrigerating medium outlet of the heat exchanger.

12. Method according to claim 11 , wherein the refrigerating medium liquefied in the liquefier is fed out of the liquefier into the heat exchanger through a refrigerating medium outlet of the liquefier, said refrigerating medium outlet being arranged in the region of a sump of the liquefier, that the refrigerating medium liquefied in the liquefier is fed out of the liquefier into the heat exchanger through a refrigerating medium outlet of the liquefier, said refrigerating medium outlet being arranged at the same height as a refrigerating medium inlet of the heat exchanger, and/or that the refrigerating medium is discharged from the heat exchanger into the receptacle of the accumulator vessel through a refrigerating medium outlet of the heat exchanger, which is arranged above the refrigerating medium outlet of the liquefier.

13. Method according to claim 11 , wherein the heat exchanger comprises a first section and a second section which is arranged downstream from the first section, wherein refrigerating medium which is fed from the refrigerating medium outlet of the liquefier into the heat exchanger flows through the first section of the heat exchanger in a first direction, driven by gravity, and wherein refrigerating medium flows through the second section of the heat exchanger in a second direction opposite to the first direction.

14. Method according to claim 11 , further comprising:

feeding refrigerating medium from a sump of the accumulator vessel into a further heat exchanger; and

discharging refrigerating medium from the further heat exchanger into a receptacle of a further accumulator vessel.

15. Method according to claim 11 , further comprising:

feeding refrigerating medium liquefied in the liquefier into a further heat exchanger;

discharging the refrigerating medium from the further heat exchanger into the heat exchanger; and

feeding refrigerating medium from the sump of the accumulator vessel into a sump of a further accumulator vessel.

16. Method according to claim 11 , further comprising:

feeding refrigerating medium liquefied in the liquefier into a further heat exchanger; and

discharging the refrigerating medium from the further heat exchanger into a receptacle of a further accumulator vessel, wherein, refrigerating medium from the sump of the accumulator vessel is transferred into a sump of the further accumulator vessel.

17. Method according to claim 11 , further comprising:

feeding refrigerating medium liquefied in the liquefier into a further heat exchanger; and

discharging the refrigerating medium from the further heat exchanger into a receptacle of a further accumulator vessel, wherein refrigerating medium is fed from the further heat exchanger into the heat exchanger upstream from a refrigerating medium outlet of the further heat exchanger, the refrigerating medium outlet of the further heat exchanger being arranged below the refrigerating medium outlet of the heat exchanger.

18. Method according to claim 11 , wherein refrigerating medium to be received in at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel is liquefied by a further liquefier, wherein the refrigerating medium liquefied by the further liquefier is fed directly into at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel.

19. Method according to claim 11 , wherein at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel is vented via a vent pipe which is connected to an interior of the liquefier, and/or refrigerating medium is recirculated from at least one of the receptacle of the accumulator vessel and the receptacle of the further accumulator vessel into the interior of the liquefier, via a recirculation conduit which is connected to the interior of the liquefier.

20. Method according to claim 11 , wherein refrigerating medium is fed from the heat exchanger into the receptacle of the accumulator vessel through multiple openings of the heat exchanger, said openings opening at different heights into the receptacle of the accumulator vessel upstream from a refrigerating medium outlet of the heat exchanger, and/or that refrigerating medium is fed from the further heat exchanger into the receptacle of the further accumulator vessel through multiple openings of the further heat exchanger, said openings opening at different heights into the receptacle of the further accumulator vessel upstream from a refrigerating medium outlet of the further heat exchanger.

21. Aircraft comprising an accumulator arrangement according to claim 1 .