Pulse tube cryocooler modulating phase via inertance tube and acoustic power amplifier thereof

A pulse tube cryocooler with acoustic power amplifier, characterized in that it comprises a first stage compressor (RG1), a first stage pulse tube (PT1), a first stage acoustic power amplifier (A1), an inertance tube (I1), and a reservoir;

• wherein the first stage compressor (C1) connects with the hot end of the first stage regenerator (RG1);
• the cold end of the first stage regenerator (RG1) connects with the cold end of the first stage pulse tube (PT1);
• a hot end of the first stage pulse tube (PT1) connects with the first stage reservoir (R1) through the first stage inertance tube (I1);
• the first stage acoustic power amplifier (A1) locates inside the first stage pulse tube (PT1), at the position with a distance X from the hot end of the first stage pulse tube (PT1), the length of the first stage acoustic power amplifier is L, X−L>0.

A pulse tube cryocooler with an acoustic power amplifier, characterized in that it includes a first stage compressor (C1), a first stage regenerator (RG1), a first stage pulse tube (PT1), a first stage acoustic power amplifier (A1), an inertance tube (I1), a first stage reservoir (R1), a second stage compressor (C2), a precooling section of second stage regenerator (RG21), a second stage regenerator (RG22), a second stage pulse tube (PT1), a second stage acoustic amplifier (A2), a second inertance tube (I2), a second stage reservoir (R2), and a thermal bridge (TB);

• wherein the first stage compressor (C1) connects with a hot end of the first stage regenerator (RG1);
• a cold end of the first stage regenerator (RG1) connects with the cold end of the first stage pulse tube (PT1);
• the hot end of the first stage pulse tube (PT1) connects with the first stage reservoir (R1) through the first stage inertance tube;
• the first stage acoustic power amplifier (A1) locates inside the first stage pulse tube (PT1);
• the distance between the first stage acoustic power amplifier and the hot end of the pulse tube is X, the length of the first stage acoustic amplifier is L, X−L>0;
• the second stage compressor (C2) connects with the hot end of the second stage regenerator (RG21);
• the cold end of the precooling section of the second stage regenerator (RG21) connects with the hot end of the second stage regenerator (RG22);
• the cold end of the second stage regenerator (RG22) connects with the cold end of the second stage pulse tube (PT2), the hot end of the second stage pulse tube (PT2) connects with the second stage reservoir (R2) through the second stage inertance tube;
• the second stage acoustic power amplifier (A2) is inside the second stage pulse tube (PT2), the distance between the hot end of the second stage pulse tube (PT2) and the second stage acoustic power amplifier (A2) is X, the length of the second stage acoustic power amplifier (A1) is L, and X−L>0;
• the cold end of the precooling section of the second stage regenerator (RG21) connects with the cold end of the first stage through the thermal bridge.

A pulse tube cryocooler with an acoustic power amplifier, characterized in that it includes a first stage pulse tube (PT1), a first stage acoustic power amplifier (A1), an inertance tube (I1), a first stage reservoir (R1), a second stage compressor (C2), a precooling section of second stage regenerator (RG21), a second stage regenerator (RG22), a second stage pulse tube (PT1), a second stage acoustic amplifier (A2), a second inertance tube (I2), a second stage reservoir (R2), and a thermal bridge (TB);

• wherein a cold end of the first stage pulse tube (PT1) connects with a hot end of the precooling section of the second stage regenerator (RG21);
• a hot end of the first stage pulse tube (PT1) connects with the first stage reservoir (R1) through the first stage inertance tube (I1);
• the first stage acoustic power amplifier (A1) is inside the first stage pulse tube (PT1);
• the distance between the first stage acoustic power amplifier (A1) and a hot end of the first stage pulse tube (PT1) is X, the length of the first stage acoustic amplifier (A1) is L, X−L>0;
• the second stage compressor (C2) connects with the hot end of the precooling section of the second stage regenerator (RG21);
• a cold end of the precooling section of the second stage regenerator (RG21) connects with the hot end of the second stage regenerator (RG22);
• a cold end of the second stage regenerator (RG22) connects with a cold end of the second stage pulse tube (PT2);
• a hot end of the second stage pulse tube (PT2) connects with the second stage reservoir (R2) through the second stage inertance tube (I2);
• the second stage acoustic power amplifier (A2) is inside the second stage pulse tube (PT2);
• the distance between the second stage acoustic power amplifier (A2) and the hot end of the second stage pulse tube (PT2) is X, the length of the second stage acoustic power amplifier (A1) is L, X−L>0.