High-temperature heat driven thermo-acoustic refrigeration heat pump system

Abstract

This invention relates to the field of refrigeration and heat pump technology, and provides a high-temperature heat-driven thermoacoustic refrigeration and heat pump system, comprising: several thermoacoustic core units and a bypass mechanism; the several thermoacoustic core units are connected end-to-end by connecting pipes, and each thermoacoustic core unit contains an interconnected thermoacoustic engine and a thermoacoustic refrigerator; the first end of the bypass mechanism is located at the inlet side of the thermoacoustic engine, and the second end of the bypass mechanism is located at the outlet side of the thermoacoustic engine. The bypass mechanism is used to divert acoustic power so that the diverted acoustic power is bypassed by the thermoacoustic engine and directly used by the thermoacoustic refrigerator. This invention solves the defect in the prior art where the energy flow mismatch between the thermoacoustic engine and the thermoacoustic refrigerator at high heating temperatures leads to deteriorated system performance and low energy efficiency ratio. It achieves the bypassing of part of the acoustic power directly to the thermoacoustic refrigerator, optimizing the energy flow matching between the thermoacoustic engine and the thermoacoustic refrigerator, and improving the system's energy efficiency ratio.

Description

Technical Field

[0001] This invention relates to the field of refrigeration and heat pump technology, and in particular to a high-temperature thermally driven thermoacoustic refrigeration and heat pump system. Background Technology

[0002] Thermoacoustic technology is based on the thermoacoustic effect, which is the technology of energy conversion between thermal energy and sound energy. The positive thermoacoustic effect can convert thermal energy into sound energy (sound energy can be further understood as the mechanical energy of sound waves); while the inverse thermoacoustic effect generates a pumping effect against the temperature gradient by consuming sound energy. Thermoacoustic engines convert thermal energy into sound energy and directly use it to drive thermoacoustic refrigerators, thereby realizing the energy conversion process of thermal energy-sound energy-cooling / heating. Thermoacoustic core units have a simple structure, long service life, environmentally friendly working fluid, and high potential efficiency, making them promising for applications in situations where electricity is scarce but thermal energy is abundant.

[0003] In the prior art, several thermoacoustic core units are interconnected end to end through a resonant tube to form a multi-unit direct-connected heat-driven thermoacoustic refrigeration system; or, several thermoacoustic core units are interconnected end to end through a liquid oscillator to form a multi-unit liquid-coupled direct-connected heat-driven thermoacoustic refrigeration system.

[0004] To achieve better thermodynamic performance, the hot-end heating temperature T during system operation is required. h Cold junction temperature T c There are certain constraints among the three temperature parameters, including the intermediate heat release temperature T0. Under ideal conditions, T... h Approximately equal to T0∙T0 / T c In the aforementioned prior art, when the hot end heating temperature T... h At higher temperatures, the acoustic power generated by the thermoacoustic engine unit is excessive and cannot be effectively utilized by the thermoacoustic refrigerator / heat pump, resulting in a mismatch between the power flow of the two and preventing the overall system's thermodynamic performance from being effectively improved as the heating temperature at the hot end increases. Summary of the Invention

[0005] This invention provides a high-temperature thermally driven thermoacoustic refrigeration heat pump system to solve the problem in the prior art where the acoustic power generated by the thermoacoustic engine exceeds the acoustic power consumed by the thermoacoustic refrigerator, resulting in an energy flow mismatch between the two, which in turn leads to deterioration of system performance and low energy efficiency. The invention bypasses the thermoacoustic engine and directly bypasses the thermoacoustic refrigerator, optimizing the energy flow matching between the thermoacoustic engine and the thermoacoustic refrigerator and improving the system's energy efficiency ratio.

[0006] This invention provides a high-temperature heat-driven thermoacoustic refrigeration heat pump system, comprising: several thermoacoustic core units and a bypass mechanism;

[0007] Several thermoacoustic core units are connected end to end by connecting pipes, and each thermoacoustic core unit is equipped with a thermoacoustic motor and a thermoacoustic refrigerator that are interconnected.

[0008] The first end of the bypass mechanism is located at the inlet side of the thermoacoustic engine, and the second end of the bypass mechanism is located at the outlet side of the thermoacoustic engine. The bypass mechanism is used to divert acoustic power so that the diverted acoustic power is exempted from being acted upon by the thermoacoustic engine and is directly acted upon by the thermoacoustic refrigerator.

[0009] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system is provided, wherein the outlet end of the bypass mechanism is located between the thermoacoustic engine and the thermoacoustic refrigeration unit.

[0010] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system includes a bypass mechanism comprising a sealed solid component that penetrates the interior of the thermoacoustic engine and is coaxially arranged with the thermoacoustic core unit.

[0011] According to the present invention, a high-temperature thermally driven thermoacoustic refrigeration heat pump system is provided, wherein the thermoacoustic engine has a ring-shaped structure so that the sealed solid component passes through its interior.

[0012] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system is provided, wherein the hermetically sealed solid component includes a first bypass piston, the first bypass piston including a large end and a small end, the large end being disposed on the inlet side of the thermoacoustic engine.

[0013] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system is provided, wherein the diameter of the large end is larger than the inner diameter of the thermoacoustic engine.

[0014] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system is provided, wherein the hermetically sealed solid component includes a second bypass piston, which is a cylindrical structure.

[0015] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system includes a bypass mechanism comprising a bypass pipe, a first end of which is connected to the inlet of the thermoacoustic engine, and a second end of which is connected to the inlet of the thermoacoustic refrigerator.

[0016] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system is provided, wherein the connecting pipe is provided with a phase-adjusting piston.

[0017] According to the present invention, a high-temperature heat-driven thermoacoustic refrigeration heat pump system is provided, wherein the connecting pipe is provided with an elastic membrane for isolating acoustic direct current.

[0018] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0019] This invention incorporates a bypass mechanism between the thermoacoustic engine and the thermoacoustic refrigerator. A portion of the acoustic power before entering the thermoacoustic engine can be directly transferred to the thermoacoustic refrigerator through the bypass mechanism. This portion of acoustic power transferred through the bypass mechanism is spared from being amplified by the thermoacoustic engine, thus effectively improving the energy flow matching between the thermoacoustic engine and the thermoacoustic refrigerator, thereby increasing the system's COP (Coefficient of Performance).

[0020] The bypass mechanism in this invention not only bypasses the acoustic power at the thermoacoustic engine inlet but also adjusts the phase. This avoids the use of resonant tubes and liquid oscillators, greatly simplifying the system structure, further improving its compactness, enhancing its adaptability to different application environments, and ultimately improving system performance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is one of the structural schematic diagrams of the high-temperature heat-driven thermoacoustic refrigeration heat pump system provided by the present invention;

[0023] Figure 2 This is the second schematic diagram of the high-temperature heat-driven plug thermoacoustic refrigeration heat pump system provided by the present invention;

[0024] Figure 3 This is the third schematic diagram of the high-temperature heat-driven thermoacoustic refrigeration heat pump system provided by the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of a multi-unit direct-connected heat-driven thermoacoustic refrigeration system provided by existing technology;

[0026] Figure 5 This is a schematic diagram of the structure of a multi-unit liquid-coupled direct-connection heat-driven thermoacoustic refrigeration system provided by existing technology;

[0027] Figure 6 This is a schematic diagram of the structure of a liquid oscillator in a multi-unit liquid-coupled direct-connection thermally driven thermoacoustic refrigeration system provided by existing technology.

[0028] Figure label:

[0029] 100: Thermoacoustic core unit; 200: Connecting pipe; 300: First bypass piston; 400: Second bypass piston; 500: Phase-adjusting piston; 600: Bypass pipe; 700: Resonant tube; 800: Liquid oscillator;

[0030] 110: Thermoacoustic engine; 120: Thermoacoustic refrigeration unit;

[0031] 111: Engine water cooler; 112: Engine regenerator; 113: Heater; 114: Engine heat buffer tube;

[0032] 121: Water cooler for refrigeration unit; 122: Regenerator for refrigeration unit; 123: Refrigeration unit; 124: Heat buffer tube for refrigeration unit. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "first" and "second" are used to clearly indicate the product components and do not represent any substantial difference. The directions of "upper" and "lower" are based on the directions shown in the accompanying drawings. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances. Furthermore, "multiple" means two or more. In the specification, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Thermoacoustic technology is based on the thermoacoustic effect, which is the energy conversion phenomenon between heat energy and sound energy. The positive thermoacoustic effect can convert heat energy into sound energy, which is embodied in the thermoacoustic engine 110 in this invention. The inverse thermoacoustic effect generates a pumping effect against the temperature gradient by consuming sound energy, which is embodied in the thermoacoustic refrigerator 120 in this invention. In some embodiments of this invention, the thermoacoustic core unit 100 is based on both the positive and inverse thermoacoustic effects, that is, the thermoacoustic core unit 100 includes the thermoacoustic engine 110 and the thermoacoustic refrigerator 120. The thermoacoustic engine 110 converts heat energy into sound energy and directly drives the thermoacoustic refrigerator 120, thereby realizing the energy conversion process of heat energy-sound energy-cooling / heating. The thermoacoustic core unit 100 has a simple structure, long service life, environmentally friendly working fluid, and high potential efficiency, and has good application prospects in situations where electricity is scarce but heat energy is abundant.

[0037] It should be noted that the thermoacoustic refrigerator 120 utilizes the thermoacoustic reverse effect to both cool and heat. Its specific function should be selected according to actual conditions in practical applications, and is not specifically limited here. The following embodiments of the present invention are all described with the thermoacoustic refrigerator 120 capable of cooling, but this does not exclude its heating function; that is, both cooling and heating capabilities of the thermoacoustic refrigerator 120 are within the protection scope of the present invention.

[0038] In the prior art 1, referring to Figure 4 A multi-unit direct-connected thermoacoustic cooling system is formed by interconnecting several thermoacoustic core units 100 through resonant tubes 700. The system operates as follows: the heater 113 in the thermoacoustic engine 110 absorbs heat from an external heat source (fuel, steam, nuclear energy, etc.) to raise its temperature, creating a temperature gradient inside the regenerator 112. This causes self-excited oscillation within the regenerator, converting thermal energy into acoustic work. This acoustic work enters the thermoacoustic refrigerator 120, where it is consumed and pumps heat against the temperature gradient in the regenerator 122, producing cooling in the refrigerator 123. The remaining acoustic work is recovered by the resonant tubes 700 and transferred to the next unit, repeating the cycle. In this system, the resonant tubes 700 are used to adjust the phase of the sound field. In practical applications, to better adjust the phase of the sound field, the resonant tubes 700 are designed to be very long (usually several meters to tens of meters), resulting in an excessively large system size, limiting its usability and causing inconvenience.

[0039] In prior art 2, refer to Figure 5Several thermoacoustic core units 100 are interconnected end-to-end via liquid oscillators 800 to form a multi-unit liquid-coupled direct-connection heat-driven thermoacoustic cooling system. This system operates on the same principle as the system in prior art 1, except that the resonant tube 700 in prior art 1 is replaced with a liquid oscillator 800, specifically a U-shaped structure (e.g.,...). Figure 6 As shown, it should be noted that Figure 5 The liquid oscillator in it is Figure 6 (Top view of the liquid oscillator). This improvement has the following advantages: First, using a liquid oscillator 800 can shorten the overall size of the device, increase the system's pressure ratio, reduce the start-up temperature, and increase the system's energy density; second, the high density of the liquid can be used to significantly reduce the system's operating frequency and reduce viscous losses. Therefore, the system in prior art 2 has higher efficiency than the system in prior art 1. However, the system in prior art 2 also has its limitations: since the liquid oscillator 800 is usually only suitable for vertical placement, its application is relatively limited. Furthermore, because the movement of the liquid is difficult to control, it cannot be guaranteed to move strictly along the axial direction, thus generating a certain amount of lateral vibration, which is particularly significant at low frequencies.

[0040] Whether it is the system in prior art 1 or the system in prior art 2, the hot end heating temperature T during operation h Cold junction temperature T c There are certain constraints among the three temperature parameters, including the intermediate heat release temperature T0. Under ideal conditions, T... h Approximately equal to T0∙T0 / T c When the hot end is heated to temperature T h At higher temperatures, the acoustic power generated by the thermoacoustic engine 110 is excessive and cannot be effectively utilized by the thermoacoustic refrigerator 120, resulting in an energy mismatch between the two. Consequently, the overall system efficiency does not effectively improve with the increase of the hot-end heating temperature. For the thermoacoustic core unit 100, one of the main methods to improve the system COP is to increase the heating temperature. However, when the heating temperature is further increased, the acoustic power generated by the thermoacoustic engine 110 exceeds the acoustic power consumed by the thermoacoustic refrigerator 120, leading to an energy flow mismatch between the two. This deteriorates the system performance, and the COP decreases instead of increasing. Neither the system in prior art 1 nor the system in prior art 2 overcomes the above problems.

[0041] To better address the aforementioned problems, embodiments of the present invention provide a high-temperature heat-driven thermoacoustic refrigeration heat pump system, referring to... Figures 1-3This embodiment includes several thermoacoustic core units 100. The number of thermoacoustic core units 100 can be 2, 3, 4, 5, etc., and the specific number can be selected according to actual needs. In actual manufacturing, the structure of the thermoacoustic core unit 100 should be designed to be more compact without affecting the power consumption. In particular, the internal channels for sound power transmission should not be too long; the length of the channels should be minimized as much as possible without affecting normal operation, thus minimizing sound power transmission loss. Specifically, the aforementioned channels can be the connection channels at the inlet of the thermoacoustic core unit 100, the internal channels of the thermoacoustic core unit 100, and the connection channels at the outlet of the thermoacoustic core unit 100, etc.

[0042] Building upon the preceding discussion, another measure to minimize acoustic power transmission loss is to increase the airtightness of the thermoacoustic core unit 100 to prevent gas leakage. Sealing rings should be installed at all connections of the thermoacoustic core unit 100 to prevent gas leakage; furthermore, parts that can be designed as a single-piece structure should be designed as such whenever possible, minimizing the use of detachable connections.

[0043] In order for the high-temperature heat-driven thermoacoustic refrigeration heat pump system provided in the embodiments of the present invention to operate normally, in some possible examples, such as Figures 1-3 As shown, several thermoacoustic core units 100 can be connected end-to-end via connecting pipes 200 to form a sealed channel, facilitating the recovery of acoustic power. It should be noted that when connecting the thermoacoustic core units 100 and the connecting pipes 200, the tightness of the connection must be ensured to prevent gas leakage. Furthermore, the corners of the connecting pipes 200 should be designed with rounded edges to facilitate acoustic power transmission. In addition, while ensuring the normal operation of the high-temperature heat-driven thermoacoustic refrigeration heat pump system provided in this embodiment of the invention, the length of the connecting pipes 200 should be minimized to reduce acoustic power loss. In other possible examples, the smoothness of the inner wall of the connecting pipes 200 should be maximized; a smooth inner wall facilitates the transmission of acoustic power within the connecting pipes 200, thereby reducing acoustic power loss.

[0044] In some possible examples, the thermoacoustic core unit 100 internally houses an interconnected thermoacoustic engine 110 and a thermoacoustic refrigerator 120. The thermoacoustic engine 110 internally comprises, in sequence, an engine water cooler 111, an engine regenerator 112, a heater 113, and an engine thermal buffer tube 114. Its principle utilizes the positive thermoacoustic effect, converting heat energy into sound energy. The thermoacoustic refrigerator 120 internally comprises, in sequence, a refrigerator water cooler 121, a refrigerator regenerator 122, a refrigerator 123, and a refrigerator thermal buffer tube 124. Its principle utilizes the negative thermoacoustic effect, converting sound energy into heat energy for cooling or heating. The thermoacoustic engine 110 and the thermoacoustic refrigerator 120 can be connected via the engine thermal buffer tube 114 and the refrigerator water cooler 121. During operation, heater 113 absorbs heat from external heat sources (fuel, steam, nuclear energy, etc.) to raise its temperature, creating a temperature gradient inside engine regenerator 112. This causes self-excited oscillation within the regenerator, converting thermal energy into mechanical energy in the form of acoustic work. The acoustic work enters the thermoacoustic refrigerator 120 through engine heat buffer pipe 114, where it is consumed by refrigerator regenerator 122 and generates heat pumping against the temperature gradient. This transfers the heat from heater 113 to refrigerator water cooler 121, completing the cooling / heating process. The remaining acoustic work is recovered by connecting pipe 200 and transferred to the next unit, continuing the cycle.

[0045] For the thermoacoustic core unit 100, one of the main methods to improve the system COP is to increase the heating temperature. However, when the heater 113 further increases the heating temperature, the acoustic power generated by the thermoacoustic engine 110 may exceed the acoustic power consumed by the thermoacoustic refrigerator 120, resulting in poor energy flow matching between the two, which degrades system performance and may even reduce the COP instead of increasing it. In order to further improve the energy flow matching between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120, in some possible examples, a bypass mechanism is provided between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120. The first end of the bypass mechanism is located on the inlet side of the thermoacoustic engine 110, and the second end of the bypass mechanism is located on the outlet side of the thermoacoustic engine 110. The bypass mechanism is used to divert acoustic power so that the diverted acoustic power is exempted from being acted upon by the thermoacoustic engine 110 and is directly acted upon by the thermoacoustic refrigerator 120, thereby effectively improving the system COP.

[0046] The principle of the bypass mechanism is as follows: when acoustic power is transmitted to the thermoacoustic core unit 100, it first passes through the thermoacoustic engine 110, and then reaches the thermoacoustic refrigerator 120, where it is converted. Without the bypass mechanism, acoustic power would be transmitted and converted in the same manner. However, when the acoustic power passes through the thermoacoustic engine 110, the engine amplifies it, increasing the amount of acoustic power that the thermoacoustic refrigerator 120 cannot absorb, which is detrimental to the energy flow matching between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120. If a bypass mechanism is provided, a portion of the acoustic power before entering the thermoacoustic engine 110 can be directly transmitted to the thermoacoustic refrigerator 120 through the bypass mechanism. The portion of acoustic power transmitted through the bypass mechanism can be spared from being amplified by the thermoacoustic engine 110, thereby reducing the workload of the thermoacoustic refrigerator 120 to a certain extent. This can effectively improve the energy flow matching between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120, and thus improve the COP of the system.

[0047] It should be noted that the location of the bypass mechanism is not restricted; furthermore, the locations of its outlet and inlet are not specifically restricted, as long as it ensures that a portion of the acoustic energy before entering the thermoacoustic engine 110 is bypassed by the thermoacoustic engine 110 and directly applied by the thermoacoustic refrigerator 120. In some possible examples, refer to... Figures 1-3 The inlet end of the bypass mechanism (i.e., the first end of the bypass mechanism) can be located on the connecting pipe 200 connected to the thermoacoustic engine 110. The exact location on the connecting pipe 200 is determined based on actual conditions and is not limited here. The outlet end of the bypass mechanism can be located between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120, ensuring that most of the acoustic energy flowing through the bypass mechanism is transmitted towards the thermoacoustic refrigerator 120. The specific location and connection method of the outlet end of the bypass mechanism (i.e., the second end of the bypass mechanism) between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120 are not limited here and can be determined based on actual conditions.

[0048] In some possible examples, a diversion controller capable of adjusting the diversion size can be installed on the bypass mechanism. This diversion controller can be a separate device other than the bypass mechanism itself, or it can achieve the effect of adjusting the diversion size by changing the length and shape of the bypass mechanism. The bypass mechanism can transmit acoustic power through gas or through a solid. As for gas-transmitted acoustic power, it generally uses a conduit to conduct the acoustic power through the air inside the conduit, delivering it to the thermoacoustic refrigerator 120. For this type of bypass mechanism, the diversion controller can be a separate device installed on the conduit, independent of the bypass mechanism itself. Specifically, a miniature valve that can adjust the opening and closing of the channel can be installed at the inlet of the channel, thereby controlling the amount of acoustic power flowing into the channel. This achieves the effect of adjusting the diversion size of the bypass mechanism.

[0049] Reference Figures 1-3 The main function of a bypass mechanism is to bypass acoustic power, but its loss of acoustic power must also be considered in its actual design. For some bypass mechanisms, the length determines the amount of acoustic power loss; the longer the mechanism, the greater the loss. The location of the inlet and outlet of the bypass mechanism directly affects its length under the same conditions; that is, the location of the inlet and outlet directly affects the amount of acoustic power loss. To minimize acoustic power loss, in some embodiments of the present invention, the inlet of the bypass mechanism can be located at the inlet of the thermoacoustic engine 110, and the outlet can be located between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120. This allows the bypass mechanism to bypass the thermoacoustic engine 110 and directly transmit acoustic power to the thermoacoustic refrigerator 120 while minimizing its length, thereby reducing acoustic power loss as much as possible.

[0050] It should be noted that the locations of the inlet and outlet of the bypass mechanism are not limited to the locations described above. In some other possible examples, the inlet of the bypass mechanism can be located at the inlet of the thermoacoustic engine 110, and the outlet of the bypass mechanism can be located at the outlet of the thermoacoustic refrigerator 120. It should be noted that the outlet of the bypass mechanism needs to face the refrigerator regenerator 122 so that the acoustic power is transmitted to the refrigerator regenerator 122 and converted by it.

[0051] In the two embodiments described above, the bypass mechanism is located between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120, where the thermoacoustic engine 110 and the thermoacoustic refrigerator 120 refer to the thermoacoustic engine 110 and the thermoacoustic refrigerator 120 within the same thermoacoustic core unit 100. In some possible examples, the bypass mechanism may also be located between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120 in different thermoacoustic core units 100. That is, the inlet end of the first bypass mechanism is located at the bottom (refer to...). Figure 3 The inlet and outlet of the thermoacoustic engine 110 in the thermoacoustic core unit 100 are located on the right side (see reference). Figure 3 The thermoacoustic core unit 100 has its thermoacoustic refrigerator 120 inlet end; the inlet end of the second bypass mechanism is located on the right side (see reference). Figure 3 The inlet and outlet of the thermoacoustic engine 110 in the thermoacoustic core unit 100 are located on the left side (see reference). Figure 3 The thermoacoustic refrigerator 120 in the thermoacoustic core unit 100; the inlet of the third bypass mechanism is located on the left side (refer to...). Figure 3 The inlet and outlet of the thermoacoustic engine 110 in the thermoacoustic core unit 100 are located at the bottom (see reference). Figure 3 The inlet end of the thermoacoustic refrigerator 120 in the thermoacoustic core unit 100.

[0052] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the bypass mechanism includes a sealed solid component, which may be made of stainless steel. In some specific examples, it may also be made into a hollow structure, and its surface may be polished to make it smoother, thereby reducing the loss of acoustic power.

[0053] In some possible examples, to make the structure of the present invention more compact, the hermetically sealed solid component can penetrate the interior of the thermoacoustic engine 110 and be coaxially arranged with the thermoacoustic core unit 100. Specifically, the hermetically sealed solid component can be embedded inside the thermoacoustic engine 110. This structural design allows the hermetically sealed solid component to simultaneously regulate phase and bypass acoustic power. The acoustic power from the outlet of the thermoacoustic refrigerator 120 enters the next stage, the thermoacoustic engine 110, and is divided into two parts by the hermetically sealed solid component. One part enters the interior of the thermoacoustic engine 110 and is amplified by it; the other part is directly transmitted to the inlet of the thermoacoustic refrigerator 120 through the hermetically sealed solid component, thus bypassing the acoustic power at the inlet of the thermoacoustic engine 110. The hermetically sealed solid component itself can also regulate phase. The bypassed acoustic power is spared amplification by the thermoacoustic engine 110, thereby effectively improving the energy flow matching between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120. Furthermore, by making the sealed solid components coaxial with the engine, the sealed solid components can be embedded within it, further improving the system's compactness and thus enhancing system performance.

[0054] In some other possible examples, one end of the sealed solid component can be located at the inlet of the thermoacoustic engine 110, and the other end at the inlet of the thermoacoustic refrigerator 120. This design allows the sealed solid component to be minimized in size without affecting its bypass acoustic function, thereby further increasing the system's compactness. It should be noted that the specific arrangement of the two ends of the sealed solid component is not limited to the above structure; the structure only needs to meet the requirements of bypassing acoustic power and adjusting phase. In specific designs, depending on the mass requirements, the sealed solid component can be designed as a hollow structure or a solid structure, as long as it remains a sealed structure.

[0055] Reference Figure 1 or Figure 2 In some embodiments of the present invention, the thermoacoustic core unit 100 has a ring-shaped structure so that a sealed solid component passes through its interior. In actual design, the thermoacoustic core unit 100 is usually designed as a ring. Correspondingly, the portion of the sealed solid component embedded inside the thermoacoustic core unit 100 is cylindrical.

[0056] Reference Figure 1 In some embodiments of the present invention, the sealed solid component includes a first bypass piston 300, which has a large end and a small end. The large end is located at the inlet of the thermoacoustic engine 110, and the small end is located at the inlet of the thermoacoustic refrigerator 120. During the design process, the area ratio between the large end and the small end of the first bypass piston 300 can be set according to the actual situation. Different area ratios can divert different bypass volumes to meet different needs.

[0057] In some possible examples, refer to Figure 1 The first bypass piston 300 can be designed in a "T" shape, with the larger end being the large end and the smaller end being the small end. In this structure, both the large and small ends are cylindrical. It should be noted that the structure of the first bypass piston 300 is not limited to this; in some other possible examples, the large end can be a platform and the small end a cylinder. In still other possible examples, the first bypass piston 300 can be stepped.

[0058] Specifically, the first bypass piston 300 can be embedded in the thermoacoustic engine 110 and coaxially arranged with it. This arrangement allows the first bypass piston 300 to simultaneously regulate phase and bypass acoustic power. The acoustic power transmitted from the thermoacoustic refrigerator 120 enters the next stage, the thermoacoustic engine 110, and is also divided into two parts. One part enters the flow channel of the thermoacoustic engine 110 for amplification, and the other part is directly transmitted to the inlet of the thermoacoustic refrigerator 120 through the first bypass piston 300, thus bypassing the acoustic power at the inlet of the thermoacoustic engine 110. Simultaneously, the first bypass piston 300 itself can regulate phase. Furthermore, by adopting the flow-splitting structure of the first bypass piston 300, the amount of acoustic power entering the thermoacoustic engine 110 and the amount of bypassed acoustic power can be adjusted by setting the area ratio between the large and small ends of the first bypass piston 300. This achieves the best acoustic power bypass effect with minimal loss, allowing the system to theoretically achieve the best performance and effectively improve the system's energy efficiency ratio.

[0059] Reference Figure 1 In some embodiments of the present invention, the diameter of the larger end is larger than the inner diameter of the thermoacoustic core unit 100. This allows the first bypass piston 300 to obtain a larger bypass volume, thereby effectively improving the system's energy efficiency ratio.

[0060] Reference Figure 2 In some embodiments of the present invention, the sealed solid component is a second bypass piston 400, which has a cylindrical structure. The second bypass piston 400 is embedded inside the thermoacoustic engine 110, serving both to adjust the phase and to bypass acoustic power. When acoustic power reaches the inlet of the thermoacoustic engine 110, it is divided into two parts by the second bypass piston 400. One part enters the thermoacoustic engine 110 and is amplified, while the other part is directly transmitted to the inlet of the thermoacoustic refrigerator 120 through the second bypass piston 400, thus bypassing the acoustic power at the inlet of the thermoacoustic engine 110. The second bypass piston 400 itself can also adjust the phase. The bypassed acoustic power is spared amplification by the thermoacoustic engine 110. Therefore, the second bypass piston 400 can be made coaxial with the engine, allowing the second bypass piston 400 to be embedded within it, further improving the system's compactness and performance. Meanwhile, the second bypass piston 400 can effectively improve the energy flow matching degree between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120, thereby improving the system's energy efficiency ratio.

[0061] Reference Figure 3In some embodiments of the present invention, the bypass mechanism includes a bypass pipe 600, which is a tubular structure. In some possible examples, one end of the bypass pipe 600 is connected to the inlet of the thermoacoustic engine 110, and the other end is connected to the inlet of the thermoacoustic refrigerator 120.

[0062] In the above structure, the remaining acoustic power at the outlet of the thermoacoustic refrigerator 120 is transferred to the inlet of the next stage, the thermoacoustic engine 110. The acoustic power at the inlet of the thermoacoustic engine 110 is then divided into two parts: one part enters the thermoacoustic engine 110 to consume heat energy and amplify the acoustic power, and the other part is directly bypassed to the inlet of the thermoacoustic refrigerator 120 through the bypass pipe 600. This allows for good power flow matching between the thermoacoustic engine 110 and the thermoacoustic refrigerator 120 at high heating temperatures, significantly improving the system's energy efficiency ratio and solving the problem of low performance in traditional direct-connected structures at high heating temperatures. Furthermore, this structure only requires the addition of a few bypass pipes 600, resulting in a relatively simple system structure.

[0063] Reference Figure 3 In some embodiments of the present invention, a phase-adjusting piston 500 is provided inside the connecting pipe 200. Compared with the traditional use of resonant tube type or liquid oscillator type as phase-adjusting mechanism, using phase-adjusting piston 500 as phase-adjusting mechanism can significantly reduce the size of resonant mechanism, improve the compactness and adaptability of system, and make its application more extensive.

[0064] In some embodiments of the present invention, an elastic membrane is provided inside the connecting pipe 200. The elastic membrane can suppress the loop DC inside the thermoacoustic engine 110 and prevent it from degrading the system performance.

[0065] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high temperature heat driven thermo-acoustic refrigeration heat pump system, characterized in that, include: Several thermoacoustic core units (100) and bypass mechanisms; Several thermoacoustic core units (100) are connected end to end by connecting pipes (200), and each thermoacoustic core unit (100) is equipped with a thermoacoustic motor (110) and a thermoacoustic refrigerator (120) that are interconnected. The first end of the bypass mechanism is located at the inlet side of the thermoacoustic engine (110), and the second end of the bypass mechanism is located at the outlet side of the thermoacoustic engine (110) and between the thermoacoustic engine (110) and the thermoacoustic refrigerator (120). The bypass mechanism is used to divert acoustic power so that the diverted acoustic power is exempted from being acted upon by the thermoacoustic engine (110) and is directly acted upon by the thermoacoustic refrigerator (120). The bypass mechanism is equipped with a shunt controller for adjusting the shunt size; The bypass mechanism includes a bypass pipe (600), the first end of which is connected to the inlet of the thermoacoustic engine (110), and the second end of which is connected to the inlet of the thermoacoustic refrigerator (120).

2. The high temperature thermoacoustic driven refrigeration heat pump system of claim 1, wherein, The connecting pipe (200) is equipped with a phase-adjusting piston (500).

3. The high temperature thermoacoustic driven refrigeration heat pump system of claim 1, wherein, The connecting tube (200) has an elastic membrane inside to isolate acoustic direct current.

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