A magnetic fluid sealed resonator, thermoacoustic engine and thermoacoustic refrigeration system

Abstract

The embodiment of the present invention provides a magnetic fluid sealed resonator, a thermoacoustic engine and a thermoacoustic refrigeration system, wherein the magnetic fluid sealed resonator comprises: a U-shaped tube, a magnetic fluid and two first magnetic parts; the U-shaped tube is filled with the magnetic fluid; the two first magnetic parts are respectively installed at the two ends of the U-shaped tube, and the liquid surface of the magnetic fluid is located within the magnetic field lines of the first magnetic parts. The magnetic fluid sealed resonator provided by the present invention uses a magnetic fluid as a liquid column without affecting the function of the liquid resonator, and uses the interaction between the magnetic fluid and the first magnetic parts to seal the liquid column, thereby solving the problem of unstable liquid surface.

Description

Technical Field

[0001] The invention relates to the field of thermoacoustics, and in particular to a magnetic fluid sealed resonator, a thermoacoustic engine and a thermoacoustic refrigeration system. Background Art

[0002] A thermoacoustic engine is an energy conversion system that converts thermal energy into mechanical energy. Figure 1 The core components mainly include heater 1, regenerator 2, water cooler 3 and resonance tube 4. When the temperature of heater 1 rises and water cooler 3 maintains a certain temperature, a temperature gradient will be established in the axial direction of regenerator 2. When the temperature gradient reaches a certain value, the gas in the system will produce self-excited oscillation, and the engine will convert thermal energy into mechanical energy in the form of sound waves. Because the thermoacoustic engine has no moving parts, it has very high reliability. At the same time, because its theoretical thermodynamic cycle efficiency is equal to that of the Carnot cycle, the thermoacoustic engine has high efficiency and good application prospects.

[0003] The resonance tube generally uses a long empty pipe. In order to make the system obtain the required operating frequency, the length of the resonance tube usually has to reach several meters or even more than ten meters. Therefore, it is very uncompact and the gas flow loss is also very large, making it difficult to apply in practice. Therefore, people propose to use a U-shaped liquid column to replace the resonance tube, such as Figure 2 . Liquid is poured into a U-shaped tube 5. The liquid has a certain mass, and the gas sealed at both ends of the liquid column has a certain elasticity, so that the system can work at a certain frequency. Since the mass of the liquid column is much larger than the gas in the acoustic resonance tube, the size of the liquid resonator can be greatly reduced, and the flow loss is also greatly reduced, and the system efficiency is greatly improved. However, the liquid resonator also has certain problems. When the movement amplitude of the liquid column in the liquid resonator increases, the surface of the liquid column will become unstable, and the phenomenon of droplets detaching from the liquid column will occur, which limits the improvement of the performance of the thermoacoustic engine. The liquid column will produce a small amount of steam entering the thermoacoustic engine, which can easily reduce the heat exchange performance of the engine. At the same time, due to the fluidity of the liquid, the liquid oscillator cannot be tilted or flipped, which greatly limits its practical application. Summary of the invention

[0004] The embodiments of the present invention provide a magnetic fluid sealed resonator, a thermoacoustic engine and a thermoacoustic refrigeration system, which are used to solve the problems of liquid level instability of a traditional liquid resonator.

[0005] An embodiment of the present invention provides a magnetic fluid sealed resonator, comprising:

[0006] A U-shaped tube, a magnetic fluid and two first magnetic members;

[0007] The U-shaped tube is filled with the magnetic fluid; the two first magnetic components are respectively installed at two ends of the U-shaped tube, and the liquid surface of the magnetic fluid is located within the range of the magnetic lines of force of the first magnetic components.

[0008] According to an embodiment of the present invention, the magnetic fluid sealed resonator further comprises:

[0009] Float; the float is installed at both ends of the U-shaped tube and floats on the liquid surface of the magnetic fluid.

[0010] According to an embodiment of the present invention, the magnetic fluid sealed resonator further comprises:

[0011] The second magnetic member is spaced apart from the inner wall of the U-shaped tube, and the second magnetic member is installed on the float.

[0012] According to a magnetic fluid sealed resonator of one embodiment of the present invention, the first magnetic component is installed on the outer wall of the U-shaped tube, the first magnetic component and the second magnetic component have opposite magnetic poles when installed, and the magnetic fluid is located within the range of magnetic lines of force of the first magnetic component and the second magnetic component.

[0013] An embodiment of the present invention further provides a thermoacoustic engine, comprising the magnetic fluid sealed resonator mentioned above.

[0014] According to a thermoacoustic engine of one embodiment of the present invention, the thermoacoustic engine further comprises: a thermoacoustic engine structure; the thermoacoustic engine structure is connected to the first end of the U-shaped tube.

[0015] According to a thermoacoustic engine of one embodiment of the present invention, the thermoacoustic engine structure comprises: a first heat chamber, a first heater, a first regenerator and a first water cooler connected in sequence;

[0016] The first heat chamber is connected to the first end of the U-shaped tube through the first heater, the first heat regenerator and the first water cooler in sequence.

[0017] According to an embodiment of the present invention, the thermoacoustic engine comprises: a plurality of thermoacoustic engine structures and a plurality of magnetic fluid sealed resonators; the head and tail ends of adjacent magnetic fluid sealed resonators are connected through the corresponding thermoacoustic engine structures.

[0018] An embodiment of the present invention further provides a thermoacoustic refrigeration system, comprising the above-mentioned thermoacoustic engine.

[0019] According to a thermoacoustic refrigeration system of one embodiment of the present invention, the thermoacoustic refrigeration system further comprises: a thermoacoustic refrigeration structure;

[0020] The thermoacoustic refrigeration structure includes: a low-temperature heat exchanger, a second heat regenerator, a high-temperature heat exchanger, an inertia tube and a second heat chamber connected in sequence; the second heat chamber is connected to the second end of the U-shaped tube through the inertia tube, the high-temperature heat exchanger, the second heat regenerator and the low-temperature heat exchanger in sequence.

[0021] The magnetic fluid sealed resonator provided by the present invention adopts magnetic fluid as liquid column without affecting the function of liquid resonator, and utilizes the interaction between magnetic fluid and first magnetic member to seal the liquid column, thereby solving the problem of unstable liquid surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of a thermoacoustic engine with an acoustic resonance tube;

[0024] Figure 2 It is a thermoacoustic engine with a U-shaped liquid resonator;

[0025] Figure 3 It is a structural schematic diagram of a magnetic fluid sealed resonator provided by an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a magnetic fluid sealed resonator provided by another embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a thermoacoustic engine provided by an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of a thermoacoustic engine provided by another embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a thermoacoustic refrigeration system provided by an embodiment of the present invention;

[0030] Figure 8 is a schematic structural diagram of a thermoacoustic refrigeration system provided by another embodiment of the present invention;

[0031] Reference numerals:

[0032] 1. Heater; 2. Regenerator; 3. Water cooler; 4. Resonance tube; 5. U-tube; 6. Magnetic fluid; 7. First magnetic member; 8. Float; 9. First heat chamber; 10. First heater; 11. First regenerator; 12. First water cooler; 13. Thermoacoustic cooling structure. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Combine the following Figure 3 The magnetic fluid sealed resonator provided in the embodiment of the present invention is described, and the magnetic fluid sealed resonator comprises: a U-shaped tube 5, a magnetic fluid 6 and two first magnetic parts 7; the U-shaped tube 5 is filled with the magnetic fluid 6. The two first magnetic parts 7 are respectively installed at both ends of the U-shaped tube 5, and the liquid surface of the magnetic fluid 6 is within the magnetic field line range of the first magnetic parts 7.

[0035] When the liquid column of the magnetic fluid 6 reciprocates, the liquid level of the magnetic fluid 6 can freely rise and fall between the first magnetic members 7. The first magnetic member 7 will have an attractive effect on the magnetic fluid 6, preventing the droplets from detaching from the liquid surface, thereby enhancing the stability of the liquid surface, so that the liquid surface will not be unstable under a large acceleration. Moreover, even if the droplets detach, they will be sucked back and return to the liquid column.

[0036] The magnetic fluid sealed resonator provided in the embodiment of the present invention adopts magnetic fluid as the liquid column without affecting the function of the liquid resonator, and utilizes the interaction between the magnetic fluid and the first magnetic member to seal the liquid column, thereby solving the problem of unstable liquid surface damage.

[0037] To further improve the stability of the liquid level, Figure 4 As shown, the magnetic fluid sealed resonator further includes: a float 8. There are two floats 8. The two floats 8 are movably mounted at both ends of the U-shaped tube 5, and the floats 8 float on the liquid surface of the magnetic fluid 6.

[0038] The magnetic fluid sealed resonator further comprises: a second magnetic component; the second magnetic component is spaced apart from the inner wall of the U-shaped tube 5, that is, a gap is left between the second magnetic component and the inner wall of the U-shaped tube 5. The second magnetic component is mounted on the float. The first magnetic component 7 is mounted on the outer wall of the U-shaped tube 5, and the corresponding magnetic poles of the first magnetic component 7 and the second magnetic component are opposite when they are mounted, and the magnetic fluid 6 is located within the magnetic force lines of the first magnetic component and the second magnetic component.

[0039] When the liquid column of the magnetic fluid 6 reciprocates, the float 8 will move up and down with the liquid surface. Due to the presence of the float 8, the area of ​​the liquid column of the magnetic fluid 6 is greatly reduced, so the instability of the liquid surface is greatly reduced. When the amplitude of the liquid column is further increased, the liquid surface between the first magnetic member 7 will still have an unstable trend, but because of the presence of the magnetic field, the magnetic field has an attractive effect on the magnetic fluid 6, preventing the droplets from leaving the liquid surface, thereby enhancing the stability of the liquid surface, causing the liquid surface to not be unstable under a large acceleration. If the magnetic field where the liquid surface is located is large enough, that is, the suction force of the first magnetic member 7 on the liquid surface is large enough, even if the liquid column of the magnetic fluid 6 is placed horizontally, the magnetic fluid 6 will not flow out from between the magnetic poles to destroy the integrity of the liquid column.

[0040] Different from the above-mentioned embodiment, this embodiment adopts magnetic fluid as the liquid column, and utilizes the interaction between the magnetic fluid, the float and the first magnetic member to seal the liquid column, thereby further improving the problem of unstable liquid surface.

[0041] The present invention also provides a thermoacoustic engine, such as Figure 5 As shown, the thermoacoustic engine comprises: the magnetic fluid sealed resonator. The structure of the magnetic fluid sealed resonator can be found in Figure 3 to Figure 4 The relevant text description will not be repeated here.

[0042] The thermoacoustic engine further comprises: a thermoacoustic engine structure; the thermoacoustic engine structure is connected to the first end of the U-shaped tube 5. The thermoacoustic engine structure comprises: a first heat chamber 9, a first heater 10, a first regenerator 11 and a first water cooler 12 connected in sequence; the first heat chamber 9 is connected to the first end of the U-shaped tube 5 through the first heater 10, the first regenerator 11 and the first water cooler 12 in sequence.

[0043] During operation, the temperature of the first heater 10 rises, the first water cooler 12 maintains a certain temperature, and a temperature gradient is established in the axial direction of the first regenerator 11. When the temperature gradient reaches a certain value, the magnetic fluid 6 in the U-tube 5 will generate self-excited oscillation, so that the engine converts thermal energy into mechanical energy in the form of sound waves.

[0044] To enhance the power of thermoacoustic engines, Figure 6As shown, the thermoacoustic engine includes: a plurality of thermoacoustic engine structures and a plurality of magnetic fluid sealed resonators. The head and tail ends of adjacent magnetic fluid sealed resonators are connected through corresponding thermoacoustic engine structures. In this embodiment, each magnetic fluid sealed resonator is connected to a thermoacoustic engine structure.

[0045] In addition, in other embodiments, the number of thermoacoustic engine structures and magnetic fluid sealed resonators can be adjusted according to actual needs to meet different working requirements.

[0046] The thermoacoustic engine provided in an embodiment of the present invention adopts a magnetic fluid sealed resonator, uses the magnetic fluid as a liquid column, and uses the interaction between the magnetic fluid and the first magnetic component to seal the liquid column, thereby solving the problem of unstable liquid surface damage, thereby effectively improving the working efficiency of the thermoacoustic engine.

[0047] The present invention also provides a thermoacoustic refrigeration system, such as Figure 7 As shown, the thermoacoustic refrigeration system includes the above-mentioned thermoacoustic engine. The structure of the thermoacoustic engine can be found in Figure 5 to Figure 6 The relevant text description will not be repeated here.

[0048] When working, the acoustic power generated by the thermoacoustic engine is input into the thermoacoustic refrigeration structure 13, and a temperature difference is generated between the low-temperature heat exchanger and the high-temperature heat exchanger through the thermoacoustic inverse effect.

[0049] In addition, in other embodiments, Figure 8 As shown, a plurality of thermoacoustic refrigeration structures 13 may also be provided to be driven by a thermoacoustic engine. The head and tail ends of adjacent magnetic fluid sealed resonators are connected through a thermoacoustic engine structure or a thermoacoustic refrigeration structure 13. The number of thermoacoustic engine structures and thermoacoustic refrigeration structures 13 may be adjusted according to actual needs.

[0050] The thermoacoustic refrigeration system provided in the embodiment of the present invention adopts a magnetic fluid sealed resonator, uses the magnetic fluid as the liquid column, and uses the interaction between the magnetic fluid and the first magnetic component to seal the liquid column, thereby solving the problem of unstable liquid surface damage, thereby effectively improving the working efficiency of the thermoacoustic engine.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic fluid sealed resonator, characterized in that: include: A U-shaped tube, a magnetic fluid, and two first magnetic members; The U-shaped tube is filled with the magnetic fluid; the two first magnetic members are respectively installed at both ends of the U-shaped tube, and the liquid level of the magnetic fluid is located within the magnetic lines of force of the first magnetic members; A second magnetic member; the second magnetic member is spaced apart from the inner wall surface of the U-shaped tube; The first magnetic component is installed on the outer wall of the U-shaped tube. The first magnetic component and the second magnetic component have opposite magnetic poles when installed. The magnetic fluid is located within the magnetic lines of force of the first magnetic component and the second magnetic component.

2. The magnetic fluid sealed resonator according to claim 1, characterized in that: The magnetic fluid sealed resonator also includes: Float; the float is installed at both ends of the U-shaped tube and floats on the liquid surface of the magnetic fluid.

3. The magnetic fluid sealed resonator according to claim 2, characterized in that: The second magnetic member is mounted on the float.

4. A thermoacoustic engine, characterized in that: The invention comprises the magnetic fluid sealed resonator as described in any one of claims 1 to 3.

5. The thermoacoustic engine according to claim 4, characterized in that The thermoacoustic engine further includes: a thermoacoustic engine structure; the thermoacoustic engine structure is connected to the first end of the U-shaped tube.

6. The thermoacoustic engine according to claim 5, characterized in that The thermoacoustic engine structure comprises: a first heat chamber, a first heater, a first regenerator and a first water cooler connected in sequence; The first heat chamber is connected to the first end of the U-shaped tube through the first heater, the first regenerator and the first water cooler in sequence.

7. The thermoacoustic engine according to claim 5, characterized in that The thermoacoustic engine comprises: a plurality of thermoacoustic engine structures and a plurality of magnetic fluid sealed resonators; The head and tail ends of the adjacent magnetic fluid sealed resonators are connected through the corresponding thermoacoustic engine structure.

8. A thermoacoustic refrigeration system, characterized in that: Comprising the thermoacoustic engine according to any one of claims 4 to 6.

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