Cascading-type pulse tube refrigerator capable of recycling sound power

Abstract

The invention discloses a cascading-type pulse tube refrigerator capable of recycling sound power. The cascading-type pulse tube refrigerator comprises a master grade pulse tube refrigerator unit, a conveying tube, an auxiliary grade pulse tube refrigerator unit and a heat bridge, wherein the master grade pulse tube refrigerator unit, the conveying tube, the auxiliary grade pulse tube refrigerator unit and the heat bridge are sequentially connected. An auxiliary grade rear cooler of the auxiliary grade pulse tube refrigerator unit and a master grade hot end heat exchanger of the master grade pulse tube refrigerator unit are connected through the conveying tube so as to recycle the sound power. According to the cascading-type pulse tube refrigerator capable of recycling the sound power, an auxiliary grade cold end heat exchanger of the auxiliary grade pulse tube refrigerator unit is connected with a master grade heat regenerator of the master grade pulse tube refrigerator unit through the heat bridge, and the extra refrigerating capacity obtained by the recycled sound power is used for precooling a certain portion of the master grade heat regenerator so as to reduce the temperature of a working medium of the master grade pulse tube refrigerator unit; compared with a traditional pulse tube refrigerator, efficiency of the cascading-type pulse tube refrigerator can be remarkably improved; the cascading-type pulse tube refrigerator has good application prospects on the occasion where the large refrigerating capacity, the high efficiency and the long service life are required.

Description

Technical field

[0001] The invention relates to a pulse tube refrigerator, in particular to a cascade type pulse tube refrigerator for recovering sound power. Background technique

[0002] The pulse tube refrigerator was first proposed by Professor Gifford and Longswoth in the United States. Because it has no moving parts at low temperatures, it avoids sliding seals, mechanical wear and other problems, and is expected to become a low-cost, low-vibration, high-reliability, and long-life low-temperature Refrigerators are widely used. With the introduction and successful application of phase modulation structures such as small-hole air storage, two-way air intake, and inertial tube, the cooling temperature of the pulse tube refrigerator is continuously reduced, and the cooling capacity and cooling efficiency are also greatly improved, close to or even under certain working conditions. Exceeding the traditional regenerative cryogenic refrigerators (such as: GM refrigerators, Stirlin...

Examples

Embodiment 1

[0031] use figure 1 The structure shown is a cascaded pulse tube refrigerator that recovers sound power, including a main-stage pulse tube refrigerator unit PTU1 and an auxiliary-stage pulse tube refrigerator unit PTU2, and the main-stage pulse tube refrigerator unit PTU1 includes a main-stage compression Engine C1, main-stage aftercooler HX1, main-stage regenerator RG1, main-stage cold-end heat exchanger HX2, main-stage pulse tube PT1, main-stage hot-end heat exchanger HX3. The auxiliary-stage pulse tube refrigerator unit PTU2 includes auxiliary-stage aftercooler HX4, auxiliary-stage regenerator RG2, auxiliary-stage cold-end heat exchanger HX5, auxiliary-stage pulse tube PT2, auxiliary-stage hot-end heat exchanger HX6 and phase modulation Element R. The main-stage hot-end heat exchanger HX3 is connected to the auxiliary-stage aftercooler HX4 through the transfer pipe TP. The auxiliary cold end heat exchanger HX5 cools the main regenerator RG1 through the thermal bridge TB. T...

Embodiment 2

[0044] use figure 2 The difference between the structure shown and the first embodiment is that the cascaded pulse tube refrigerator that recovers sound power can remove the transfer tube TP, remove the main stage hot end heat exchanger HX3 or the auxiliary stage aftercooler HX4, and others The structure remains unchanged, this structure can also recover part of the sound work.

[0045] The invention can also connect N auxiliary-stage pulse tube refrigerator units in sequence without a transfer tube, and analogously, can form a system with N auxiliary-stage pulse tube refrigerator units, where N is generally greater than or equal to 2 and less than An integer equal to 10, each auxiliary-stage pulse tube refrigerator unit includes auxiliary-stage aftercooler, auxiliary-stage regenerator, auxiliary-stage cold-end heat exchanger, auxiliary-stage, pulse tube, auxiliary-stage hot-end heat exchanger, Among the two auxiliary pulse tube refrigerator units connected in sequence, the auxi...

Technical field

[0001] The invention relates to a pulse tube refrigerator, in particular to a cascade type pulse tube refrigerator for recovering sound power. Background technique

[0002] The pulse tube refrigerator was first proposed by Professor Gifford and Longswoth in the United States. Because it has no moving parts at low temperatures, it avoids sliding seals, mechanical wear and other problems, and is expected to become a low-cost, low-vibration, high-reliability, and long-life low-temperature Refrigerators are widely used. With the introduction and successful application of phase modulation structures such as small-hole air storage, two-way air intake, and inertial tube, the cooling temperature of the pulse tube refrigerator is continuously reduced, and the cooling capacity and cooling efficiency are also greatly improved, close to or even under certain working conditions. Exceeding the traditional regenerative cryogenic refrigerators (such as: GM refrigerators, Stirlin...

Examples

Embodiment 1

[0031] use figure 1 The structure shown is a cascaded pulse tube refrigerator that recovers sound power, including a main-stage pulse tube refrigerator unit PTU1 and an auxiliary-stage pulse tube refrigerator unit PTU2, and the main-stage pulse tube refrigerator unit PTU1 includes a main-stage compression Engine C1, main-stage aftercooler HX1, main-stage regenerator RG1, main-stage cold-end heat exchanger HX2, main-stage pulse tube PT1, main-stage hot-end heat exchanger HX3. The auxiliary-stage pulse tube refrigerator unit PTU2 includes auxiliary-stage aftercooler HX4, auxiliary-stage regenerator RG2, auxiliary-stage cold-end heat exchanger HX5, auxiliary-stage pulse tube PT2, auxiliary-stage hot-end heat exchanger HX6 and phase modulation Element R. The main-stage hot-end heat exchanger HX3 is connected to the auxiliary-stage aftercooler HX4 through the transfer pipe TP. The auxiliary cold end heat exchanger HX5 cools the main regenerator RG1 through the thermal bridge TB. T...

Embodiment 2

[0044] use figure 2 The difference between the structure shown and the first embodiment is that the cascaded pulse tube refrigerator that recovers sound power can remove the transfer tube TP, remove the main stage hot end heat exchanger HX3 or the auxiliary stage aftercooler HX4, and others The structure remains unchanged, this structure can also recover part of the sound work.

[0045] The invention can also connect N auxiliary-stage pulse tube refrigerator units in sequence without a transfer tube, and analogously, can form a system with N auxiliary-stage pulse tube refrigerator units, where N is generally greater than or equal to 2 and less than An integer equal to 10, each auxiliary-stage pulse tube refrigerator unit includes auxiliary-stage aftercooler, auxiliary-stage regenerator, auxiliary-stage cold-end heat exchanger, auxiliary-stage, pulse tube, auxiliary-stage hot-end heat exchanger, Among the two auxiliary pulse tube refrigerator units connected in sequence, the auxi...

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