Containing cavity in thermo-acoustic heat pump

Abstract

The utility model provides an accommodating cavity in a thermo-acoustic heat pump. The accommodating cavity comprises an accommodating cavity body unit, a driving unit, a three-way valve, a core cabin and an annular pipe unit, three ends of the three-way valve are respectively connected with the driving unit, the accommodating cavity body unit and the core cabin; the core cabin is connected with the accommodating cavity body unit through the annular pipe unit; the three-way valve comprises two pipelines which are vertically intersected with each other, and the intersection point of the axes of the two pipelines is the central point of the three-way valve; the distance from the joint of the containing cavity unit and the three-way valve to the center point in the axial direction is a first distance, the distance from the joint of the core cabin and the three-way valve to the center point in the axial direction is a second distance, and the ratio of the first distance to the second distance ranges from 1 to 3. According to the containing cavity in the thermo-acoustic heat pump, through reasonable design of the connection position relation between the three-way valve and the containing cavity body and between the three-way valve and the core cabin, the transmission and amplification effect of sound waves in a thermo-acoustic system can be effectively improved, energy loss in the sound wave transmission process is reduced, and therefore the heat energy conversion efficiency of the containing cavity in the thermo-acoustic heat pump is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a cavity in a thermoacoustic heat pump. Background Technique

[0002] The thermoacoustic heat pump is a new type of heat pump technology that uses sound waves to achieve heat transfer and conversion. Compared with traditional compression heat pumps, the thermoacoustic heat pump has the advantages of simple structure, no need for refrigerant, and environmental friendliness, and has broad application prospects in industrial and commercial fields. However, the cavity in the existing thermoacoustic heat pump still faces some problems in practical applications.

[0003] The performance and efficiency of the thermoacoustic heat pump depend to a large extent on the layout design and optimization of its internal key components. The relative positional relationship and size matching among the cavity body, the three-way valve, and the core cabin have an important impact on the overall performance of the thermoacoustic heat pump. Currently, this point is often ignored in the design of the thermoacoustic heat pump in the prior art, resulting in unreasonable connection positional relationship and size matching between the cavity body and the three-way valve and the core cabin, which affects the working performance of the thermoacoustic heat pump.

[0004] Specifically, the distance between the cavity body and the core cabin is not reasonably designed, which affects the thermoacoustic effect inside the thermoacoustic heat pump, and further affects the stable operation of the heat pump. In addition, there are also deficiencies in the relative size and shape design of the cavity body in the prior art, and the influence of such structural parameters on the sound wave transmission and amplification has not been fully considered.

[0005] Therefore, how to optimize the layout design of the internal key components of the thermoacoustic heat pump, reasonably set the relative positional relationship and size matching between the cavity body and the three-way valve and the core cabin, and optimize the shape parameters of the cavity body has become the key to improving the performance of the thermoacoustic heat pump. Content of the Utility Model

[0006] The purpose of the utility model is to provide a cavity in a thermoacoustic heat pump to improve the performance of the thermoacoustic heat pump.

[0007] To achieve the above purpose, the utility model provides a cavity in a thermoacoustic heat pump, including a cavity body unit, a driving unit, a three-way valve, a core cabin, and an annular tube unit;

[0008] Three ends of the three-way valve are respectively connected to the driving unit, the cavity body unit, and the core cabin; the core cabin is connected to the cavity body unit through the annular tube unit;

[0009] The three-way valve includes two pipelines that intersect perpendicularly. The intersection point of the axes of the two pipelines is the center point of the three-way valve. The distance from the connection between the cavity unit and the three-way valve to the center point along the axis is the first distance, and the distance from the connection between the core module and the three-way valve to the center point along the axis is the second distance. The ratio range of the first distance to the second distance is 1 to 3.

[0010] Furthermore, the cavity unit includes a first cavity module and a second cavity module. The first cavity module is connected to the second cavity module. The first cavity module is connected to the annular pipe unit, and the second cavity module is connected to the core module.

[0011] Specifically, the first cavity module includes a first conical cavity and a first cylindrical cavity. One end of the first conical cavity is connected to the first cylindrical cavity, and the other end is connected to the annular pipe unit. The first cylindrical cavity is connected to the second cavity module.

[0012] Furthermore, the first conical cavity is an open-topped conical-shaped cavity that penetrates up and down, and its slope is 30 to 50 degrees. The first cylindrical cavity is a cylindrical-shaped cavity that penetrates up and down, and the ratio of its diameter to that of the core module ranges from 2 to 4.

[0013] Specifically, the second cavity module includes a second conical cavity and a second cylindrical cavity. One end of the second conical cavity is connected to the second cylindrical cavity, and the other end is connected to the three-way valve. The second cylindrical cavity is connected to the first cavity module.

[0014] Furthermore, the second conical cavity is an open-topped conical-shaped cavity that penetrates up and down, and its slope is 30 to 50 degrees. The second cylindrical cavity is a cylindrical-shaped cavity that penetrates up and down, and the ratio of its diameter to that of the core module ranges from 2 to 4.

[0015] Specifically, the cavity unit includes an intermediate section located between the first cavity module and the second cavity module. The ratio of the axial length of the intermediate section to the maximum inner diameter of the cavity unit is 1:1 to 1:0.1.

[0016] Furthermore, an elastic membrane is provided inside the cavity unit. The elastic membrane is a thin film made of an elastic material and is installed at the middle position of the cavity unit or arranged at any position in the intermediate section. The material of the elastic membrane is beryllium copper film, rubber or stainless steel film. The natural vibration frequency of the elastic membrane is less than 150 HZ.

[0017] Specifically, a pressure equalizer is provided on the elastic membrane, and its position is within a range with the center of the elastic membrane as the center of the circle and a radius range of 0 to 10 mm; the pressure equalizer is a through-hole penetrating the elastic membrane, and the aperture is 0.1 to 5.5 mm.

[0018] Furthermore, the material of the cavity chamber unit is aluminum alloy, aluminum-magnesium alloy, stainless steel or carbon steel. The utility model has the following beneficial effects:

[0019] Through the specific arrangement of the three-way valve, the cavity chamber unit and the core cabin, as well as the setting of the ratio of the first distance to the second distance, the sound wave propagation path in the thermoacoustic heat pump can be optimized, the loss of sound waves can be reduced, and the efficiency of the thermoacoustic heat pump can be improved. The cavity chamber unit adopts the connection structure of the first cavity module and the second cavity module, and is provided with the first conical cavity, the first cylindrical cavity, the second conical cavity and the second cylindrical cavity with specific shapes and sizes, which can adjust the propagation and attenuation of sound waves in the cavity, and improve the performance of the thermoacoustic heat pump. An elongated part is provided in the middle part of the cavity chamber unit, and the ratio of the elongated length to the maximum diameter of the cavity chamber unit is controlled, which can extend the propagation distance of sound waves in the cavity, enhance the interaction between sound waves and the medium, and further improve the efficiency of the thermoacoustic heat pump. An elastic membrane is provided in the cavity chamber unit, and the material, natural vibration frequency and installation position of the elastic membrane are controlled, which can adjust the frequency and amplitude of sound waves, reduce the generation of higher harmonics, and improve the stability and reliability of the thermoacoustic heat pump. A pressure equalizer is provided on the elastic membrane, and the position and aperture size of the pressure equalizer are controlled, which can balance the pressure on both sides of the elastic membrane, reduce the vibration stress of the elastic membrane, extend the service life of the elastic membrane, and improve the long-term operation stability of the thermoacoustic heat pump. Using materials such as aluminum alloy, aluminum-magnesium alloy, stainless steel or carbon steel to manufacture the cavity chamber unit can ensure that the cavity has sufficient strength and rigidity, and at the same time has good thermal conductivity and corrosion resistance, extend the service life of the thermoacoustic heat pump, and reduce the maintenance cost.

[0020] The cavity structure of the utility model can improve the production efficiency, and has certain economic efficiency and application and promotion prospects. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of a cavity in a thermoacoustic heat pump according to an embodiment of the utility model;

[0022] Figure 2 It is a partial enlarged schematic diagram of a cavity in a thermoacoustic heat pump according to an embodiment of the utility model.

[0023] Markings in the figure: 10, the first conical cavity, 11, the first cylindrical cavity, 12, the second cylindrical cavity, 13, the second conical cavity, 20, the motor, 30, the three-way valve, 40, the core cabin, 50, the annular tube unit. Detailed implementation mode

[0024] The following embodiments are described in conjunction with the accompanying drawings, and the technical solutions of the present utility model are comprehensively and clearly elaborated. It should be emphasized that the embodiments mentioned below are only for explaining the present utility model and do not constitute a definition of its protection scope. The actual protection scope of the present utility model shall be based on the specific provisions in the claims. All modifications based on this embodiment or equivalent technical substitutions shall be regarded as being included within the protection scope of the present utility model.

[0025] As Figure 1 shown, this embodiment proposes a cavity in a thermoacoustic heat pump, which includes a cavity chamber unit, a driving unit, a three-way valve 30, a core cabin 40, and an annular tube unit 50; three ends of the three-way valve 30 are respectively connected to the driving unit, the cavity chamber unit, and the core cabin 40; the core cabin 40 is connected to the cavity chamber unit through the annular tube unit 50.

[0026] Specifically, in a specific embodiment, for the convenience of example, the driving unit is selected as the motor 20. The motor 20 can be an efficient linear motor, which has the advantages of fast response speed, high control precision, good reliability, etc., and can effectively drive the thermoacoustic heat pump system to work. The motor 20 is connected to one end of the three-way valve 30 and is connected to the cavity chamber unit and the core cabin 40 through the three-way valve 30, converting the mechanical energy generated by the motor 20 into acoustic energy and transmitting it to other components of the system to achieve thermoacoustic conversion and refrigeration / heating functions. Selecting a suitable model and specification of the motor 20 and optimizing its connection design with the three-way valve 30 and the cavity chamber unit can improve the power performance and energy conversion efficiency of the thermoacoustic heat pump system.

[0027] Furthermore, the cavity chamber unit includes a first cavity module and a second cavity module; the first cavity module is connected to the second cavity module; the first cavity module is connected to the annular tube unit 50, and the second cavity module is connected to the core cabin 40.

[0028] Specifically, the first cavity module includes a first conical cavity 10 and a first cylindrical cavity 11. One end of the first conical cavity 10 is connected to the first cylindrical cavity 11, and the other end is connected to the annular tube unit 50. The first cylindrical cavity 11 is connected to the second cavity module; the second cavity module includes a second conical cavity 13 and a second cylindrical cavity 12. One end of the second conical cavity 13 is connected to the second cylindrical cavity 12, and the other end is connected to the three-way valve 30. The second cylindrical cavity 12 is connected to the first cavity module.

[0029] Furthermore, the first conical cavity 10 is an open-topped conical-shaped cavity that penetrates vertically; the first cylindrical cavity 11 is a vertically penetrating cylindrical-shaped cavity; the second conical cavity 13 is an open-topped conical-shaped cavity that penetrates vertically; the second cylindrical cavity 12 is a vertically penetrating cylindrical-shaped cavity.

[0030] Among them, the slope α of the first conical cavity 10 or the second conical cavity 13 is 30 to 50 degrees. In this embodiment, the slopes of both the first conical cavity 10 and the second conical cavity 13 are 40 degrees. This setting of the slope is beneficial to the transmission and amplification of sound waves in the conical cavity, improving the thermoacoustic conversion efficiency.

[0031] Specifically, the ratio of the diameter of the first cylindrical cavity 11 to the diameter of the core module 40 ranges from 2 to 4. In this embodiment, the ratio of the diameter of the first cylindrical cavity 11 to the diameter of the core module 40 is 3. The ratio of the diameter of the second cylindrical cavity 12 to the diameter of the core module 40 ranges from 2 to 4. In this embodiment, the ratio of the diameter of the second cylindrical cavity 12 to the diameter of the core module 40 is 2. By reasonably setting the diameter ratio of the cylindrical cavity to the core module 40, the acoustic characteristics inside the thermoacoustic heat pump can be optimized, improving the thermoacoustic conversion efficiency and the refrigeration and heating performance of the system.

[0032] As Figure 2 shown, the three-way valve 30 includes two pipes that intersect perpendicularly, and the intersection point of the axes of the two pipes is the center point of the three-way valve 30; the distance from the connection of the cavity unit to the three-way valve 30 along the axis to the center point is the first distance H1, and the distance from the connection of the core module 40 to the three-way valve 30 along the axis to the center point is the second distance H2. The ratio range of the first distance H1 to the second distance H2 is 1 to 3. In this embodiment, the ratio of the first distance H1 to the second distance H2 is 2. By optimizing the connection positions of the cavity unit and the core module 40 to the three-way valve 30, the transmission characteristics of sound waves in the system can be improved, reducing the energy loss during the transmission of sound waves.

[0033] In some embodiments, the cavity unit includes an intermediate section (not shown in the figure) located between the first cavity module and the second cavity module. The ratio of the axial length of the intermediate section to the maximum inner diameter of the cavity unit is 1:1 to 1:0.1, preferably 1:0.8, 1:0.6, 1:0.4, or 1:0.2. The material of the intermediate section can be selected from aluminum alloy, aluminum-magnesium alloy, stainless steel, carbon steel, etc. to provide sufficient strength and support. The function of the intermediate section is to provide support for the elastic membrane, while helping to eliminate the harmonics in the pipeline and converting the propagation speed of sound waves into pressure energy.

[0034] In some embodiments, the cavity unit includes an intermediate section located between the first cavity module and the second cavity module. In the embodiments provided with the intermediate section, an elastic membrane (not shown in the figure) is disposed in the intermediate section, and the elastic membrane is a thin film made of an elastic material. The elastic membrane can be installed at the middle position of the intermediate section, that is, at the midpoint of the axial length of the intermediate section. In some other embodiments, the elastic membrane can also be arranged at other positions of the intermediate section, such as one end close to the first cavity module or one end close to the second cavity module, as long as the function of the elastic membrane can be exerted.

[0035] In the embodiments without the intermediate section, the elastic membrane can be installed at the middle position of the cavity unit, that is, at the midpoint of the axial length of the cavity unit.

[0036] The material of the elastic membrane can be selected from beryllium copper film, rubber film, stainless steel film, etc., and preferably beryllium copper film. The natural vibration frequency of the elastic membrane should be less than 150 Hz, preferably less than 120 Hz, 100 Hz, 80 Hz or 50 Hz. The function of the elastic membrane is to store energy using its elastic potential energy, and can quickly reduce the frequency of sound waves, reorganize sound waves, and filter out most of the harmonic components. A pressure equalizer is arranged on the elastic membrane, and the pressure equalizer is located in a circular area with the center of the elastic membrane as the center and a radius of 0 - 10 mm, preferably located in a circular area with a radius of 0.5 mm, 1 mm, 2 mm, 5 mm or 8 mm. The pressure equalizer is a through hole penetrating the elastic membrane, and its aperture can be 0.1 - 5.5 mm, preferably 0.2 mm, 0.5 mm, 1 mm, 2 mm or 4 mm. The function of the pressure equalizer is to balance the pressure in the pipeline and help filter out some harmonic components.

[0037] It should be noted that the overall shape design of the cavity unit is also beneficial to the further expansion and cooling of the gas after passing through the elastic membrane, so as to better protect the elastic membrane and extend its service life.

[0038] In summary, the cavity in the thermoacoustic heat pump proposed by the present utility model has the following beneficial effects:

[0039] By setting the relative positional relationship among the cavity unit, the three-way valve, and the core module, the transmission path of sound waves in the system is optimized. The distance between the connection position of the cavity unit and the three-way valve and the center point of the three-way valve is 1 to 3 times the distance between the connection position of the core module and the three-way valve. This design reduces the energy loss during the transmission of sound waves and improves the thermoacoustic conversion efficiency. At the same time, the present utility model optimizes the shape and size of the cavity unit. The first conical cavity and the second conical cavity adopt a truncated conical structure, which is beneficial to the transmission and amplification of sound waves in the conical cavity. In addition, the ratio of the diameters of the first cylindrical cavity and the second cylindrical cavity to the diameter of the core module is 2 to 4. This size matching improves the acoustic characteristics inside the thermoacoustic heat pump and enhances the thermoacoustic conversion efficiency and the refrigeration and heating performance of the system.

[0040] Combining the above optimization measures, the cavity in the thermoacoustic heat pump proposed by the present utility model improves the transmission and amplification characteristics of sound waves in the system by optimizing the layout design and size matching among the cavity unit, the three-way valve, and the core module, and enhances the thermoacoustic conversion efficiency. Combined with the application of the motor, the heat exchange capacity and power performance of the system are further enhanced, providing a cavity in a high-performance and highly reliable thermoacoustic heat pump for industrial applications.

[0041] Compared with the prior art, the cavity in the thermoacoustic heat pump of the present utility model is optimized in terms of structural layout and key component design, significantly improving the thermoacoustic conversion efficiency and overall performance of the system, and having certain application prospects. Compared with the traditional thermoacoustic heat pump, the device of the present utility model has advantages in terms of performance, efficiency, reliability, etc. At the same time, this optimized design also has certain applicability and can play a role in different industrial fields and application scenarios, contributing to energy conservation, emission reduction, and sustainable development. Therefore, the cavity in the thermoacoustic heat pump of the present utility model not only has technological innovation but also certain economic and social benefits, and is worthy of popularization and application.

[0042] Obviously, those skilled in the art can make changes and deformations to the present utility model. As long as these changes do not depart from the core principle and protection scope of the present utility model, they are regarded as being included within the present utility model. These changes may involve aspects such as component design, system layout, or control strategies, aiming to improve performance or meet specific requirements. As long as the modified technical solution conforms to the claims of the present utility model and its equivalent scope, it is covered by the present utility model.

Claims

1. A cavity in a thermoacoustic heat pump, characterized in that: It includes a chamber unit, a driving unit, a three-way valve, a core module and an annular pipe unit; The three ends of the three-way valve are respectively connected to the drive unit, the cavity unit and the core cabin; the core cabin is connected to the cavity unit through the annular pipe unit; The three-way valve includes two pipelines that intersect each other perpendicularly, and the intersection of the axes of the two pipelines is the center point of the three-way valve; the distance from the connection between the chamber unit and the three-way valve to the center point along the axial direction is the first distance, and the distance from the connection between the core module and the three-way valve to the center point along the axial direction is the second distance, and the ratio of the first distance to the second distance ranges from 1 to 3.

2. The cavity in the thermoacoustic heat pump according to claim 1, characterized in that: The accommodating cavity unit includes a first cavity module and a second cavity module; the first cavity module is connected to the second cavity module; the first cavity module is connected to the annular pipe unit, and the second cavity module is connected to the core module.

3. The cavity in the thermoacoustic heat pump according to claim 2, characterized in that: The first cavity module includes a first conical cavity and a first cylindrical cavity, one end of the first conical cavity is connected to the first cylindrical cavity, and the other end is connected to the annular pipe unit, and the first cylindrical cavity is connected to the second cavity module.

4. The cavity in the thermoacoustic heat pump according to claim 3, characterized in that: The first conical cavity is a truncated cone-shaped cavity that penetrates from top to bottom, and its slope is 30 to 50 degrees; the first cylindrical cavity is a cylindrical cavity that penetrates from top to bottom, and its ratio to the diameter of the core module is in the range of 2 to 4.

5. The cavity in the thermoacoustic heat pump according to claim 2, characterized in that: The second cavity module includes a second conical cavity and a second cylindrical cavity, one end of the second conical cavity is connected to the second cylindrical cavity, and the other end is connected to the three-way valve, and the second cylindrical cavity is connected to the first cavity module.

6. The cavity in the thermoacoustic heat pump according to claim 5, characterized in that: The second conical cavity is a truncated cone-shaped cavity that runs through from top to bottom, and its slope is 30 to 50 degrees; the second cylindrical cavity is a cylindrical cavity that runs through from top to bottom, and its ratio to the diameter of the core module is in the range of 2 to 4.

7. The cavity in the thermoacoustic heat pump according to claim 2, characterized in that: The accommodating cavity unit includes a middle section located between the first cavity module and the second cavity module, and a ratio of an axial length of the middle section to a maximum inner diameter of the accommodating cavity unit is 1:1 to 1:0.

1.

8. The cavity in the thermoacoustic heat pump according to claim 7, characterized in that: An elastic membrane is provided in the cavity unit. The elastic membrane is a thin film made of elastic material and is installed in the middle position of the cavity unit or arranged at any position of the middle section. The material of the elastic membrane is beryllium copper membrane, rubber or stainless steel membrane. The natural vibration frequency of the elastic membrane is less than 150HZ.

9. The cavity in the thermoacoustic heat pump according to claim 8, characterized in that: A pressure balancer is arranged on the elastic membrane, and is located in a circular area with a radius of 0 to 10 mm and a center of the elastic membrane. The pressure balancer is a through hole penetrating the elastic membrane, and the hole diameter is 0.1 to 5.5 mm.

10. The cavity in the thermoacoustic heat pump according to claim 7, characterized in that: The material of the middle section is aluminum alloy, aluminum-magnesium alloy, stainless steel or carbon steel.

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