Single-stage double-acting traveling-wave thermoacoustic system

Abstract

The present invention provides a single-stage double-acting traveling-wave thermoacoustic system, comprising three elementary units; each unit comprises a linear motor and a thermoacoustic conversion device. The linear motor comprises a cylinder and a piston; the piston can perform straight reciprocating motion in the cylinder. The thermoacoustic conversion device comprises a first heat exchanger, a heat regenerator, a second heat exchanger, a thermal buffer tube and a third heat exchanger connected in sequence, the first heat exchanger and the third heat exchanger of each thermoacoustic conversion device are connected to cylinder cavities of different linear motors respectively, forming a loop structure of a gas medium flow. The system comprises a thermal buffer tube and a third heat exchanger, making the temperature of gas medium given feedback to the cylinder cavity of another linear motor be close to the room temperature, ensuring the piston and cylinder working at room temperature.

What is claimed is: 
     
         1 . A single-stage double-acting traveling-wave thermoacoustic system, comprising three elementary units, wherein each elementary unit comprises a linear motor and a thermoacoustic conversion device; the linear motor comprising a cylinder and a piston, wherein the piston can perform a straight reciprocating motion in the cylinder; wherein—the thermoacoustic conversion device comprising a first heat exchanger, a heat regenerator, a second heat exchanger, a thermal buffer tube and a third heat exchanger connected in sequence; and
 the first heat exchanger and the third heat exchanger of each thermoacoustic conversion device are connected to cylinder cavities of different linear motors respectively, forming a loop structure for flow of a gas medium. 
 
     
     
         2 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 1 , wherein at least one DC suppressor is mounted on a connecting pipeline of the loop structure. 
     
     
         3 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 1 , wherein each linear motor comprises two cylinder cavities, and wherein both of the cylinder cavities are a compression chamber and an expansion chamber, and wherein the compression chamber is connected to the first heat exchanger, and the expansion chamber is connected to the third heat exchanger. 
     
     
         4 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 1 , wherein each linear motor comprises two cylinder cavities, and wherein both of the cylinder cavities are a compression chamber and an expansion chamber, and wherein the compression chamber is connected to the third heat exchanger, and the expansion chamber is connected to the first heat exchanger. 
     
     
         5 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 3 , wherein there is one piston in the linear motor, and the two cylinder cavities are formed at two sides of the piston. 
     
     
         6 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 3 , wherein there is one piston in the linear motor and shapes of the cylinder and the piston is of ladder structure mutually matched; the two cylinder cavities are formed at different ladders on the same side of the piston. 
     
     
         7 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 3 , wherein there are two pistons in the linear motor, and wherein the two pistons are provided at two ends of the linear motor respectively, and wherein the two cylinder cavities are positioned at two ends of the linear motor respectively. 
     
     
         8 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 1 , wherein each linear motor comprises one cylinder cavity, which is connected to the first heat exchanger and the third heat exchanger in different thermoacoustic conversion devices. 
     
     
         9 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 8 , wherein there is one piston in the linear motor and the cylinder cavity is formed at one side of the piston. 
     
     
         10 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 1 , wherein working surfaces of the piston in each cylinder cavity can be parallel and in opposite directions, and there are three or four elementary units. 
     
     
         11 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 1 , wherein working surfaces of the piston in each cylinder cavity is parallel and in the same direction, and there are four to twelve elementary units. 
     
     
         12 . The single-stage double-acting traveling-wave thermoacoustic system according to  claims 1 , wherein the heat regenerator is of a loop structure, the thermal buffer tube is mounted at the inner side of the heat regenerator, and wherein the first heat exchanger is of a ring-shape structure and connected to one end of the heat regenerator, and wherein the second heat exchanger is connected to another end of the heat regenerator and the thermal buffer tube, and wherein the third heat exchanger is embedded at inner side of the loop structure of the first heat exchanger. 
     
     
         13 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 2 , wherein the DC suppressor is mounted on the connecting pipeline between the first heat exchanger and the cylinder cavity, or is mounted on the connecting pipeline between the third heat exchanger and the cylinder cavity. 
     
     
         14 . The single-stage double-acting traveling-wave thermoacoustic system according to  claim 2 , wherein the DC suppressor is a jet pump or an elastic diaphragm capsule.