CN218065412U - Free piston Stirling refrigeration/heat pump system based on high-temperature heat source drive - Google Patents
Free piston Stirling refrigeration/heat pump system based on high-temperature heat source drive Download PDFInfo
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- CN218065412U CN218065412U CN202222099329.0U CN202222099329U CN218065412U CN 218065412 U CN218065412 U CN 218065412U CN 202222099329 U CN202222099329 U CN 202222099329U CN 218065412 U CN218065412 U CN 218065412U
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Abstract
The utility model provides a free piston stirling refrigeration/heat pump system based on high temperature heat source drive, include: a thermoacoustic engine unit, a thermal buffer tube, a thermoacoustic refrigerator/heat pump unit, an ejector and a harmonic oscillator; the hot end of the thermoacoustic engine unit is connected with the hot end of the thermoacoustic refrigerator/heat pump unit through a thermal buffer tube, the cold end of the thermoacoustic refrigerator/heat pump unit is communicated with the input end of the discharger, the middle part of the discharger is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit, and the output end of the discharger is respectively communicated with the harmonic oscillator and the cold end of the thermoacoustic engine unit. The utility model discloses can make the system realize under well heating temperature operating mode that the effective energy flow of heat sound engine unit and heat sound refrigerator heat pump unit matches, when guaranteeing that heat sound engine unit obtains higher heat sound conversion efficiency, can not cause great influence to the efficiency of heat sound refrigerator heat pump unit to make the complete machine system have higher heat drive refrigeration/efficiency of heating.
Description
Technical Field
The utility model relates to an energy power technical field especially relates to a free piston stirling refrigeration/heat pump system based on high temperature heat source drive.
Background
The thermoacoustic technology is a technology for realizing mutual conversion of heat energy and sound energy based on thermoacoustic effect, wherein the thermoacoustic positive effect can convert heat energy into acoustic power, and the thermoacoustic reverse effect can be driven by the acoustic power to generate refrigeration or pump heat. The existing heat-driven free piston thermoacoustic Stirling refrigeration/heat pump system is based on thermoacoustic positive effect and thermoacoustic inverse effect, and the thermoacoustic engine unit converts heat energy into acoustic power and is directly used for driving the thermoacoustic refrigerator/heat pump unit so as to realize the energy conversion process of heat energy-acoustic energy-heat supply/refrigeration. The heat-driven free piston thermoacoustic Stirling refrigeration/heat pump system is compact in structure, high in power density and potential efficiency, environment-friendly in working medium, capable of reducing the problems of oil lubrication, gas working medium pollution and the like by canceling the traditional crank connecting rod, and particularly has good application prospect in occasions with power shortage and abundant heat energy.
The existing heat-driven free piston thermoacoustic Stirling refrigeration/heat pump system comprises a direct connection unit, an ejector and a harmonic oscillator; the direct connection unit comprises a thermoacoustic engine unit, a thermal buffer pipe and a thermoacoustic refrigerator/heat pump unit which are sequentially connected. The high-temperature heat exchanger in the thermoacoustic engine unit is heated, the medium-temperature heat exchanger is maintained at room temperature, and a heat regenerator in the thermoacoustic engine unit can form a certain temperature gradient, so that gas in the heat regenerator of the engine generates self-excited oscillation, and heat energy is converted into mechanical energy in the form of acoustic power; the sound power enters the thermoacoustic refrigerator/heat pump unit through the heat buffer tube, and the heat of the low-temperature heat exchanger is conveyed into the medium-temperature heat exchanger, so that the refrigeration/pump heat process is completed. In the process, the ejector recovers the sound power of the outlet of the direct connection unit, and the sound power flows to the thermoacoustic engine unit again so as to work in a reciprocating mode. Compared with the traditional heat-driven double-effect free piston Stirling system, the refrigeration/heat pump system has the advantages that one mechanical moving part is reduced, the structure is simpler, and the reliability is higher.
However, in practice it has been found that the above described refrigeration/heat pump system employs a thermal buffer tube rather than a mechanical component to directly couple the thermoacoustic engine unit and the thermoacoustic refrigerator/heat pump unit and to perform sound field phasing and matching with only a single ejector. Although the refrigeration/heat pump system has a simple and compact structure, the regulation capacity of the energy flow is limited, and if the sound power generated by the thermoacoustic engine unit is not matched with the power consumption of the thermoacoustic refrigerator/heat pump unit, the heat-driven refrigeration/heating coefficient of the whole system is seriously reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a free piston stirling refrigeration/heat pump system based on high temperature heat source drive for there is the problem of refrigeration/the inefficiency that heats in solving current thermal drive free piston thermoacoustic stirling refrigeration/heat pump system.
The utility model provides a free piston stirling refrigeration/heat pump system based on high temperature heat source drive, include: a thermoacoustic engine unit, a thermal buffer tube, a thermoacoustic refrigerator/heat pump unit, an ejector and a harmonic oscillator;
the hot end of the thermoacoustic engine unit is connected with the hot end of the thermoacoustic refrigerator/heat pump unit through the thermal buffer tube, the cold end of the thermoacoustic refrigerator/heat pump unit is communicated with the input end of the discharger, the middle part of the discharger is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit, and the output end of the discharger is respectively communicated with the harmonic oscillator and the cold end of the thermoacoustic engine unit.
According to the free piston Stirling refrigeration/heat pump system driven by the high-temperature heat source, the ejector comprises a cylinder body, a working piston and a plate spring;
the cold end of the thermoacoustic refrigerator/heat pump unit is communicated with the first end of the cylinder body, the harmonic oscillator and the cold end of the thermoacoustic engine unit are respectively communicated with the second end of the cylinder body, and the hot end of the thermoacoustic refrigerator/heat pump unit is communicated with the middle part of the cylinder body;
the working piston is movably arranged in the cylinder body and is connected with the cylinder body through the plate spring; the working piston comprises at least one reducing section, and the working piston is matched with the cylinder body in shape.
According to the utility model provides a free piston stirling refrigeration/heat pump system based on high temperature heat source drive, the cylinder body includes first cavity section and second cavity section, the one end of first cavity section and the one end of second cavity section intercommunication, the one end of first cavity section and the hot junction of thermoacoustic refrigerator/heat pump unit intercommunication, the internal diameter of first cavity section is greater than the internal diameter of second cavity section;
the working piston comprises a first piston section and a second piston section, one end of the first piston section is connected with one end of the second piston section, the first piston section is arranged on the first cavity section, the second piston section is arranged on the second cavity section, and the diameter of the first piston section is larger than that of the second piston section.
According to the utility model provides a pair of free piston stirling refrigeration/heat pump system based on high temperature heat source drive, the ejector with form the one-level compression chamber between the harmonic oscillator, the middle part of ejector with form the second grade compression chamber between the hot junction of heat sound refrigerator/heat pump unit, the cold junction of heat sound refrigerator/heat pump unit with form the expansion chamber between the ejector.
According to the utility model provides a pair of free piston stirling refrigeration/heat pump system based on high temperature heat source drive, heat sound engine unit heat buffer tube reaches heat sound refrigerator/heat pump unit set up respectively in one side of discharger, the middle part of discharger pass through the bypass resonance tube with heat sound refrigerator/heat pump unit's hot junction intercommunication.
According to the utility model provides a free piston stirling refrigeration/heat pump system based on high temperature heat source drive, thermoacoustic engine unit, heat buffer tube and thermoacoustic refrigerator/heat pump unit encircle the ejector respectively, and for the coaxial setting of axis of ejector; and a bypass hole is formed in the inner wall surface of the discharger, and the discharger is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit through the bypass hole.
According to the utility model provides a pair of free piston stirling refrigeration/heat pump system based on high temperature heat source drive, the by-pass hole is equipped with a plurality ofly, and is a plurality of the by-pass hole for the axis of discharger is the circumference equipartition.
According to the utility model provides a pair of free piston stirling refrigeration/heat pump system based on high temperature heat source drive, heat sound engine unit heat buffer tube with heat sound refrigerator/heat pump unit is followed heat buffer tube's axis setting is the integral type structure.
According to the utility model provides a free piston stirling refrigeration/heat pump system based on high temperature heat source drive, the thermoacoustic engine unit includes first intermediate temperature heat exchanger, first regenerator and high temperature heat exchanger, first intermediate temperature heat exchanger, first regenerator and high temperature heat exchanger are end to end connected in proper order, the high temperature heat exchanger with the first end of thermal buffer pipe is connected;
the thermoacoustic refrigerator/heat pump unit comprises a second intermediate-temperature heat exchanger, a second heat regenerator and a low-temperature heat exchanger, wherein the second intermediate-temperature heat exchanger, the second heat regenerator and the low-temperature heat exchanger are sequentially connected end to end, the second end of the heat buffer pipe is connected with the second intermediate-temperature heat exchanger, and the low-temperature heat exchanger is communicated with the input end of the discharger.
According to the utility model provides a pair of free piston stirling refrigeration/heat pump system based on high temperature heat source drive still includes: a linear generator; the linear generator is connected with the harmonic oscillator, or the linear generator and the harmonic oscillator are of an integrated structure.
The utility model provides a pair of free piston stirling refrigeration/heat pump system based on high temperature heat source drive, through setting up hot sound engine unit, the heat buffer tube, hot sound refrigerator/heat pump unit, ejector and harmonic oscillator, the middle part with the ejector communicates with the hot junction of hot sound refrigerator/heat pump unit, can retrieve the back at the acoustics of hot sound refrigerator/heat pump unit cold junction through the ejector, partly acoustics of retrieving does not pass through the enlargement of hot sound engine unit, but direct backward flow to hot sound refrigerator/heat pump unit, in order to realize the high-efficient energy stream between the acoustics that need consume to the acoustics that hot sound engine unit produced and hot sound refrigerator/heat pump unit under the higher heating temperature condition and match, when guaranteeing that hot sound engine unit can obtain higher hot sound conversion efficiency under the well heating temperature operating mode, can not cause great influence to the efficiency of hot sound refrigerator/heat pump unit, thereby make complete machine system have higher heat drive refrigeration/efficiency of heating.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is one of the schematic structural diagrams of the free piston stirling refrigeration/heat pump system driven by a high temperature heat source according to the present invention;
fig. 2 is a second schematic diagram of the free piston stirling refrigeration/heat pump system driven by a high temperature heat source according to the present invention.
Reference numerals,
10. A thermoacoustic engine unit; 101. a first medium temperature heat exchanger; 102. a first heat regenerator; 103. a high temperature heat exchanger; 20. a thermal buffer tube; 30. a thermoacoustic refrigerator/heat pump unit; 301. a second medium temperature heat exchanger; 302. a second regenerator; 303. a low temperature heat exchanger; 40. an ejector; 401. a cylinder body; 402. a working piston; 403. a plate spring; 50. a harmonic oscillator; 60. a linear generator; 70. a first stage compression chamber; 80. a secondary compression chamber; 90. an expansion chamber; 100. a bypass orifice.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings in the present invention will be combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A free piston stirling refrigeration/heat pump system based on high temperature heat source actuation according to the present invention is described below with reference to fig. 1-2.
As shown in fig. 1 and 2, the present embodiment provides a free piston stirling refrigeration/heat pump system driven based on a high temperature heat source, comprising: thermoacoustic engine unit 10, thermal buffer tube 20, thermoacoustic refrigerator/heat pump unit 30, ejector 40, and harmonic oscillator 50.
The hot end of the thermoacoustic engine unit 10 is connected with the hot end of the thermoacoustic refrigerator/heat pump unit 30 through the thermal buffer tube 20, the cold end of the thermoacoustic refrigerator/heat pump unit 30 is communicated with the input end of the ejector 40, the middle part of the ejector 40 is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit 30, and the output end of the ejector 40 is respectively communicated with the harmonic oscillator 50 and the cold end of the thermoacoustic engine unit 10.
It can be understood that a first-stage compression chamber 70 is formed between the ejector 40 and the resonator 50, a second-stage compression chamber 80 is formed between the middle of the ejector 40 and the hot end of the thermo-acoustic refrigerator/heat pump unit 30, and an expansion chamber 90 is formed between the cold end of the thermo-acoustic refrigerator/heat pump unit 30 and the ejector 40.
Meanwhile, the thermoacoustic refrigerator/heat pump unit 30 includes a second intermediate-temperature heat exchanger 301, a second heat regenerator 302, and a low-temperature heat exchanger 303, the second intermediate-temperature heat exchanger 301, the second heat regenerator 302, and the low-temperature heat exchanger 303 are sequentially connected end to end, the second end of the thermal buffer tube 20 is connected to the second intermediate-temperature heat exchanger 301, and the low-temperature heat exchanger 303 is communicated with the input end of the ejector 40.
A gas working medium is also arranged in the free piston thermoacoustic Stirling refrigeration/heat pump system, and the gas working medium can be nitrogen, argon, helium or other inert gases. Wherein the gaseous working substance is not specifically illustrated in fig. 1 and 2.
In the working process, the working principle of the whole system is as follows: in the thermoacoustic engine unit 10, the high temperature heat exchanger 103 absorbs heat from a high temperature heat source and reaches a preset heating temperature, when the temperature gradient in the first heat regenerator 102 reaches a critical value or above, the gas working medium in the system starts to generate self-oscillation, the engine unit converts heat energy into mechanical energy in the form of acoustic power, the acoustic power generated by the thermoacoustic engine unit 10 directly enters the thermoacoustic refrigerator/heat pump unit 30 through the thermal buffer tube 20, the acoustic power is consumed and continuously pumps heat from the low temperature heat exchanger 303 on the low temperature side to the second medium temperature heat exchanger 301, the acoustic power of the thermoacoustic refrigerator/heat pump unit 30 at the low temperature heat exchanger 303 flows to the ejector 40 and is recovered by the ejector 40.
Then, a part of the acoustic power from the ejector 40 flows back to the thermo-acoustic refrigerator/heat pump unit 30 through the secondary compression chamber 80, and is not amplified by the thermo-acoustic engine unit 10; another part of the acoustic power passing through the ejector 40 is output through the ejector 40, a part of the acoustic power passes through the harmonic oscillator 50 to adjust the resonant frequency of the whole system, and the rest of the acoustic power reenters the thermoacoustic engine unit 10 to perform the reciprocating operation.
From the above, the utility model discloses a set up thermoacoustic engine unit 10, heat buffer tube 20, thermoacoustic refrigerator/heat pump unit 30, ejector 40 and harmonic oscillator 50, the middle part with ejector 40 communicates with the hot junction of thermoacoustic refrigerator/heat pump unit 30, can be at the acoustic power of thermoacoustic refrigerator/heat pump unit 30 cold junction after ejector 40 retrieves, a part of acoustic power of retrieving does not pass through the enlarging of thermoacoustic engine unit 10, but direct backward flow to thermoacoustic refrigerator/heat pump unit 30, in order to realize the high-efficient energy flow between the acoustic power that thermoacoustic engine unit 10 produced and the acoustic power that thermoacoustic refrigerator/heat pump unit 30 need consume under the higher heating temperature condition and match, make thermoacoustic engine unit 10 can obtain higher thermoacoustic conversion efficiency, can not cause great influence to the refrigeration/efficiency of thermoacoustic refrigerator/heat pump unit 30 simultaneously.
Therefore, the utility model discloses can improve the heating temperature to the hot junction of heat sound engine unit 10 under the unchangeable condition of the temperature operating mode of heat sound refrigerator heat pump unit 30, and then obtain higher engine heat sound conversion efficiency and do not cause to show the influence to heat sound refrigerator heat pump unit 30's efficiency to effectively promote the refrigeration of complete machine/efficiency of heating.
It should be noted that the ejector 40 shown in the present embodiment not only plays a role of recovering acoustic power, but also is an important adjusting mechanism for sound field impedance, phase matching and energy matching of the system. In practice, the stiffness and dynamic mass of the plate spring 403 in the ejector 40 and the structural parameters of the secondary compression chamber 80 can be determined according to the sound field phase modulation requirements.
In some embodiments, as shown in fig. 1 and 2, the present embodiment modifies the configuration of the ejector 40 in order to facilitate ensuring that a portion of the acoustic work recovered by the ejector 40 automatically returns to the thermo-acoustic refrigerator/heat pump unit 30 based on the structural characteristics of the ejector 40.
Specifically, the ejector 40 includes a cylinder 401, a working piston 402, and a plate spring 403. The cold end of the thermoacoustic refrigerator/heat pump unit 30 is communicated with the first end of the cylinder body 401, the cold ends of the harmonic oscillator 50 and the thermoacoustic engine unit 10 are respectively communicated with the second end of the cylinder body 401, and the hot end of the thermoacoustic refrigerator/heat pump unit 30 is communicated with the middle of the cylinder body 401.
Wherein, the working piston 402 is movably arranged in the cylinder 401 and is connected with the cylinder 401 through a plate spring 403; the working piston 402 comprises at least one variable diameter section, the working piston 402 being adapted to the shape of the cylinder 401.
It will be appreciated that at the variable diameter section of the working piston 402, the cross-sectional area of the working piston 402 along its axis exhibits a continuous or stepped change. For example, the variable diameter section of the working piston 402 comprises at least two cylindrical sections of different diameters connected in series.
Thus, based on the structural characteristics of the working piston 402, a cavity is formed between the variable diameter section of the working piston 402 and the inner wall surface of the cylinder 401 in the middle section near the cylinder 401, and in the process that the working piston 402 moves towards the second end of the cylinder 401 along the extending direction of the cylinder 401, the working piston 402 compresses the cavity, so that the volume of the cavity is gradually reduced, a part of the acoustic work recovered by the ejector 40 is prompted to automatically flow back to the thermoacoustic refrigerator/heat pump unit 30 through the secondary compression chamber 80, and the other part of the acoustic work recovered by the ejector 40 is conveyed to the primary compression chamber 70 through the output end of the ejector 40, and enters the thermoacoustic engine unit 10 and the harmonic oscillator 50 through the primary compression chamber 70.
It should be noted here that the present embodiment employs a gap seal between the side wall of the working piston 402 and the inner side wall of the cylinder 401, and based on the supporting force provided by the plate spring 403, it is possible to ensure that the working piston 402 and the cylinder 401 are coaxially arranged.
Further, as shown in fig. 1 and 2, the cylinder block 401 of the present embodiment includes a first cavity section and a second cavity section, one end of the first cavity section communicates with one end of the second cavity section, one end of the first cavity section facing away from the second cavity section is connected to the low-temperature heat exchanger 303 of the thermo-acoustic refrigerator/heat pump unit 30, and one end of the second cavity section facing away from the first cavity section communicates with the thermo-acoustic engine unit 10 and the harmonic oscillator 50, respectively, through the primary compression chamber 70. One end of the first cavity section is also in communication with the hot end of the thermoacoustic refrigerator/heat pump unit 30, the inner diameter of the first cavity section being greater than the inner diameter of the second cavity section.
Accordingly, the working piston 402 includes a first piston section and a second piston section, one end of the first piston section is connected to one end of the second piston section, the first piston section is disposed in the first cavity section, the second piston section is disposed in the second cavity section, and the diameter of the first piston section is greater than the diameter of the second piston section.
In this way, during the process that the working piston 402 moves towards the second end of the cylinder 401 along the extending direction of the cylinder 401, a cavity is defined between one end of the first piston section and one end of the second cavity section, and as the first piston section gradually approaches the second cavity section, the volume of the cavity gradually decreases, so that a part of the acoustic work recovered by the ejector 40 automatically flows back to the thermo-acoustic refrigerator/heat pump unit 30 through the secondary compression chamber 80.
Based on the solution of the above embodiment, as shown in fig. 1, the thermoacoustic engine unit 10, the thermal buffer tube 20, and the thermoacoustic refrigerator/heat pump unit 30 of the present embodiment are respectively disposed at one side of the ejector 40, and the middle portion of the ejector 40 is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit 30 through the bypass resonance tube.
The bypass resonance tube of the present embodiment is used as the secondary compression chamber 80, and the thermoacoustic engine unit 10, the thermal buffer tube 20 and the thermoacoustic refrigerator/heat pump unit 30 may be arranged along the central axis of the thermal buffer tube 20 to form an integrated structure.
Based on the solution of the above embodiment, as shown in fig. 2, in order to ensure the compactness of the overall structure of the free-piston thermoacoustic stirling refrigeration/heat pump system, in this embodiment, the thermoacoustic engine unit 10, the thermal buffer tube 20 and the thermoacoustic refrigerator/heat pump unit 30 respectively surround the ejector 40 and are coaxially arranged with respect to the central axis of the ejector 40; the inner wall surface of the discharger 40 is provided with a bypass hole 100, and the discharger 40 is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit 30 through the bypass hole 100.
It can be understood that the thermoacoustic engine unit 10, the thermal buffer tube 20, and the thermoacoustic refrigerator/heat pump unit 30 of the present embodiment are all circular, and the thermoacoustic engine unit 10, the thermal buffer tube 20, and the thermoacoustic refrigerator/heat pump unit 30 are sequentially disposed on the outer side surface of the cylinder 401 of the ejector 40 along the central axis of the ejector 40.
In order to ensure the effect of dividing the sound power recovered by the ejector 40 into two parts by the bypass hole 100 toward the thermo-acoustic refrigerator/heat pump unit 30, the bypass hole 100 of the present embodiment is provided in plural, and the plural bypass holes 100 are circumferentially and uniformly distributed with respect to the central axis of the ejector 40.
Compared with the scheme of the embodiment, the embodiment cancels the bypass resonance tube, thereby ensuring the compactness of the whole structure of the system. Since the cavity enclosed between one end of the first piston segment and one end of the second piston segment is communicated with the thermo-acoustic refrigerator/heat pump unit 30, the cavity between the cylinder 401 and the working piston 402 can be used as the secondary compression chamber 80 to control the return of the acoustic power to the thermo-acoustic refrigerator/heat pump unit 30 through the secondary compression chamber 80.
Meanwhile, the working piston 402 of the ejector 40 of the present embodiment is provided with a connecting rod, and the connecting rod, after passing through the output end of the ejector 40, passes through the resonator 50 and is supported by the plate spring 403, so as to ensure that the working piston 402 and the cylinder 401 are coaxially arranged.
It should be noted here that the resonator 50 may be a resonant piston, and the resonant piston is coaxially connected to the connecting rod. Of course, the harmonic oscillator 50 and the working piston 402 of the ejector 40 may be separately disposed, and a detailed description thereof is omitted.
Based on the solution of the above embodiment, the free-piston thermoacoustic stirling refrigeration/heat pump system shown in this embodiment further includes: a linear generator 60; the linear generator 60 is connected with the harmonic oscillator 50, or the linear generator 60 and the harmonic oscillator 50 are integrated.
In this way, the present embodiment can recover the kinetic energy of the reciprocating motion of the harmonic oscillator 50, so as to convert the kinetic energy of the harmonic oscillator 50 into electric energy through the linear generator 60, thereby achieving effective utilization of the energy. Since the arrangement of the linear generator 60 and the harmonic oscillator 50 belongs to the prior art, the description thereof is omitted.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A free piston stirling refrigeration/heat pump system driven from a high temperature heat source comprising: a thermoacoustic engine unit, a thermal buffer tube, a thermoacoustic refrigerator/heat pump unit, an ejector and a harmonic oscillator;
the hot end of the thermoacoustic engine unit is connected with the hot end of the thermoacoustic refrigerator/heat pump unit through the thermal buffer tube, the cold end of the thermoacoustic refrigerator/heat pump unit is communicated with the input end of the discharger, the middle part of the discharger is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit, and the output end of the discharger is respectively communicated with the harmonic oscillator and the cold end of the thermoacoustic engine unit.
2. A high temperature heat source drive based free piston stirling cooler/heat pump system as claimed in claim 1 wherein said displacer includes a cylinder, a working piston and a leaf spring;
the cold end of the thermoacoustic refrigerator/heat pump unit is communicated with the first end of the cylinder body, the harmonic oscillator and the cold end of the thermoacoustic engine unit are respectively communicated with the second end of the cylinder body, and the hot end of the thermoacoustic refrigerator/heat pump unit is communicated with the middle part of the cylinder body;
the working piston is movably arranged in the cylinder body and is connected with the cylinder body through the plate spring; the working piston comprises at least one reducing section, and the shape of the working piston is matched with that of the cylinder body.
3. A high temperature heat source driven free piston stirling cooler/heat pump system in accordance with claim 2 wherein said cylinder includes a first cavity section and a second cavity section, one end of said first cavity section communicating with one end of said second cavity section, one end of said first cavity section communicating with the hot side of said thermo-acoustic cooler/heat pump unit, the inner diameter of said first cavity section being greater than the inner diameter of said second cavity section;
the working piston comprises a first piston section and a second piston section, one end of the first piston section is connected with one end of the second piston section, the first piston section is arranged on the first cavity section, the second piston section is arranged on the second cavity section, and the diameter of the first piston section is larger than that of the second piston section.
4. A free piston stirling cooler/heat pump system based on drive of a high temperature heat source as claimed in any one of claims 1 to 3 wherein a primary compression chamber is formed between the ejector and the harmonic oscillator, a secondary compression chamber is formed between the middle of the ejector and the hot end of the thermo-acoustic cooler/heat pump unit, and an expansion chamber is formed between the cold end of the thermo-acoustic cooler/heat pump unit and the ejector.
5. A free piston Stirling refrigeration/heat pump system driven by a high temperature heat source according to claim 4, wherein the thermo-acoustic engine unit, the thermal buffer tube and the thermo-acoustic refrigerator/heat pump unit are respectively disposed at one side of the ejector, and the middle of the ejector is in communication with the hot end of the thermo-acoustic refrigerator/heat pump unit through a bypass resonance tube.
6. A free piston Stirling refrigeration/heat pump system driven by a high temperature heat source according to claim 4, wherein said thermo-acoustic engine unit, said thermal buffer tube and said thermo-acoustic refrigerator/heat pump unit each surround said ejector and are disposed coaxially with respect to a central axis of said ejector; and a bypass hole is formed in the inner wall surface of the discharger, and the discharger is communicated with the hot end of the thermoacoustic refrigerator/heat pump unit through the bypass hole.
7. A free piston Stirling refrigeration/heat pump system based on driving of a high temperature heat source according to claim 6, wherein a plurality of said bypass holes are provided, and said plurality of said bypass holes are circumferentially and uniformly distributed with respect to a central axis of said ejector.
8. A high temperature heat source-driven free-piston stirling cooler/heat pump system in accordance with any one of claims 1 to 3 wherein said thermoacoustic engine unit, said thermal buffer tube and said thermoacoustic cooler/heat pump unit are disposed in a unitary structure along a central axis of said thermal buffer tube.
9. A high temperature heat source drive based free piston stirling cooler/heat pump system according to claim 8 wherein said thermoacoustic engine unit comprises a first intermediate temperature heat exchanger, a first recuperator and a high temperature heat exchanger, said first intermediate temperature heat exchanger, said first recuperator and said high temperature heat exchanger being connected end to end in sequence, said high temperature heat exchanger being connected to a first end of said thermal buffer tube;
the thermoacoustic refrigerator/heat pump unit comprises a second intermediate-temperature heat exchanger, a second heat regenerator and a low-temperature heat exchanger, wherein the second intermediate-temperature heat exchanger, the second heat regenerator and the low-temperature heat exchanger are sequentially connected end to end, the second end of the heat buffer pipe is connected with the second intermediate-temperature heat exchanger, and the low-temperature heat exchanger is communicated with the input end of the ejector.
10. A high temperature heat source drive-based free piston stirling cooler/heat pump system in accordance with any one of claims 1 to 3 further comprising: a linear generator; the linear generator is connected with the harmonic oscillator, or the linear generator and the harmonic oscillator are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222099329.0U CN218065412U (en) | 2022-08-10 | 2022-08-10 | Free piston Stirling refrigeration/heat pump system based on high-temperature heat source drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222099329.0U CN218065412U (en) | 2022-08-10 | 2022-08-10 | Free piston Stirling refrigeration/heat pump system based on high-temperature heat source drive |
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| CN218065412U true CN218065412U (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222099329.0U Active CN218065412U (en) | 2022-08-10 | 2022-08-10 | Free piston Stirling refrigeration/heat pump system based on high-temperature heat source drive |
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| Country | Link |
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| CN (1) | CN218065412U (en) |
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2022
- 2022-08-10 CN CN202222099329.0U patent/CN218065412U/en active Active
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