Patent ID: 11904271
Assignee: SPX FLOW TECHNOLOGY KOREA CO., LTD
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 11:
12. An air drying system for drying a compressed air flow comprising:
a first dehumidifier configured to condense and remove a first amount of moisture contained in the compressed air flow, the first dehumidifier including:
a freezer in which a refrigerant flow circulates through a refrigeration cycle, and
a first heat exchanger including a first channel and a second channel, the first channel circulating the compressed air flow and the second channel circulating the refrigerant flow, and a phase change material disposed between the first channel and the second channel,
wherein the heat exchanger performs a first heat exchange and a second heat exchange, where during the first heat exchange, the refrigerant flow absorbs heat from the phase change material and changes the phase of the phase change material, and during the second heat exchange the phase change material directly absorbs heat from the compressed air flow;

a second dehumidifier including a dehumidifying tank carrying a deliquescent agent, the deliquescent agent having a moisture absorption ratio of less than or equal to 50% (≤RH 50), the second dehumidifier configured to further absorb a second amount of moisture from the compressed air flow discharged from the first dehumidifier; and
a second heat exchanger configured to perform a third heat exchange between the compressed air flow prior to flowing into the first dehumidifier and the compressed air flow discharged from the second dehumidifier, the second heat exchanger receiving the compressed air flow discharged from the second dehumidifier in its entirety.