Chinese Academy of Sciences

China Unionpay Co., Ltd.

Zhi Lu

Zheng Huang

Lei Ding

Baoyu Yang

Yinong Wu

Zhenhua Jiang

Shaoshuai Liu

Shuo He

Peng Zhao

Hongwen Meng

Zhichao Chen

Xiaoping Qu

Xiaoshan Pan

Jiantang Song

Haifeng Zhu

Xinquan Sha

Disclosed is a sub-Kelvin temperature zone refrigeration mechanism. The sub-Kelvin temperature zone refrigeration mechanism includes a pulse tube refrigeration unit, first pre-cooling heat exchangers, a throttling refrigeration unit, second pre-cooling heat exchangers, an adsorption refrigeration unit, a third pre-cooling heat exchanger and a dilution refrigeration unit. The pulse tube refrigeration unit includes a pulse tube refrigeration part. The throttling refrigeration unit includes a throttling refrigeration part, and the throttling refrigeration part is connected with the adsorption refrigeration unit through the second pre-cooling heat exchangers so as to pre-cool the adsorption refrigeration unit. The adsorption refrigeration unit includes an adsorption refrigeration part, and the adsorption refrigeration part is connected with the dilution refrigeration unit through the third pre-cooling heat exchanger. The dilution refrigeration unit includes a dilution refrigeration part, and the dilution refrigeration part is a refrigeration terminal of the sub-Kelvin temperature zone refrigeration mechanism.

Sub-kelvin temperature zone refrigeration mechanism

The disclosed subject matter includes an active control alternating-direct flow hybrid mechanical cryogenic system, and relates to the field of cryogenic refrigeration technologies. The active control alternating-direct flow hybrid mechanical cryogenic system includes a main compressor, a Stirling cold finger, an intermediate heat exchanger, a pulse tube cold finger, a first dividing wall type heat exchanger, a final precooled heat exchanger, a second dividing wall type heat exchanger, and an evaporator that are communicated successively, where the second dividing wall type heat exchanger is connected to the evaporator through a second connecting pipeline, and a throttling element is disposed on the second connecting pipeline; a pulse tube cold head of the pulse tube cold finger is communicated with the final precooled heat exchanger through a cold chain; and a check valve is disposed on the intermediate heat exchanger.

Active control alternating-direct flow hybrid mechanical cryogenic system

A card to card transfer method used in the financial system is provided in the present invention, and comprises an initializing step, a transferring step and a transaction confirming step, wherein the initializing step includes the steps of calculating and obtaining the public key certificate and checking the amount of the transaction and so on, and the transferring step includes the steps of performing the transaction and so on. The present invention can achieve the function of transferring the electronic cash between two cards and can prevent the risk of repeatedly transferring the money into the card for transfer-in by using the card for transfer-out and so on.

Transfer method of electronic cash

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Shanghai, China

Zhi Lu