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1. (WO2017004009) REFRIGERATING SYSTEM AND PURIFICATION METHOD FOR THE SAME
Nota: O texto foi obtido por processos automáticos de reconhecimento ótico de caracteres.
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CLAIMS

1. A refrigerating system, comprising:

a refrigerating loop, comprising a compressor, a condenser, a throttling element, and an evaporator that are connected in sequence through a pipeline; and

a purification loop, connected to the refrigerating loop and configured to separate a pressure maintaining gas in the refrigerating loop;

wherein the refrigerating loop is connected into the purification loop from a highest position or a local highest position of the refrigerating system.

2. The refrigerating system according to claim 1, wherein the refrigerating loop is connected into the purification loop from the top of the compressor or the top of the condenser.

3. The refrigerating system according to claim 1, wherein the purification loop is connected back to the refrigerating loop from the bottom of the condenser.

4. The refrigerating system according to claim 1, wherein the purification loop is connected back to the refrigerating loop from the bottom of the evaporator.

5. The refrigerating system according to any one of claims 1 to 4, wherein the purification loop comprises a purification compressor, a purification condenser, an expansion valve, and a low-temperature separator that are connected in sequence through a pipeline; and the purification loop is bi-directionally connected to the refrigerating loop through the low-temperature separator.

6. The refrigerating system according to claim 5, wherein the refrigerating loop is connected into the top of the low-temperature separator from the top of the compressor or the top of the condenser; and/or the bottom of the low-temperature separator is connected back to the refrigerating loop from the bottom of the condenser or the bottom of the evaporator.

7. The refrigerating system according to claim 5, wherein the purification loop further comprises: a discharge branch, configured to discharge the pressure maintaining gas separated by the low-temperature separator.

8. The refrigerating system according to claim 7, wherein the discharge branch is connected to the top of the low-temperature separator.

9. The refrigerating system according to claim 7, wherein a regeneration filter and an air pump are arranged on the discharge branch.

10. The refrigerating system according to any one of claims 1 to 4, wherein the purification loop comprises a booster pump and a pressurizing separator, and the purification loop is bi-directionally connected to the refrigerating loop through the pressurizing separator.

11. The refrigerating system according to claim 10, wherein the purification loop further comprises a cooling component configured to assist in separation.

12. The refrigerating system according to any one of claims 1 to 3, wherein the purification loop comprises a semi-permeable membrane separator, and the purification loop is bi-directionally connected to the refrigerating loop through the semi-permeable membrane separator.

13. A purification method for a refrigerating system, comprising:

in a first time period, performing:

S I: charging, into the refrigerating system, a refrigerant that satisfies a designed refrigerating capacity;

S2: charging a pressure maintaining gas into the refrigerating system, so that pressure in the refrigerating system is higher than atmospheric pressure; and

in a second time period, performing:

S3: separating and discharging the pressure maintaining gas in the refrigerating system.

14. The purification method for a refrigerating system according to claim 13, wherein the first time period comprises: a time period from when manufacturing of the refrigerating system is completed to when the refrigerating system is ready to be loaded for transportation.

15. The purification method for a refrigerating system according to claim 13, wherein the second time period comprises: a time period that is after the refrigerating system is loaded and transported to a target location and before the refrigerating system officially runs.

16. The purification method according to any one of claims 13 to 15, wherein:

under a same pressure, the pressure maintaining gas has a liquefaction temperature lower than that of the refrigerant, and cannot chemically react with the refrigerant and/or the refrigerating system.

17. The purification method according to claim 16, wherein the pressure maintaining gas is an inert gas, nitrogen, or carbon dioxide.

18. The purification method according to any one of claims 13 to 15, wherein S3 comprises: separating the pressure maintaining gas in the refrigerating system by means of a low temperature, and discharging the pressure maintaining gas before the refrigerating system officially runs.

19. The purification method according to any one of claims 13 to 15, wherein S3 comprises: separating the pressure maintaining gas in the refrigerating system by means of pressurizing, and discharging the pressure maintaining gas before the refrigerating system officially runs.

20. The purification method according to any one of claims 13 to 15, wherein S3 comprises: separating the pressure maintaining gas in the refrigerating system by means of a selective semi-permeable membrane, and discharging the pressure maintaining gas before the refrigerating system officially runs.