Finned tube type phase change heat storage device

Abstract

The application discloses finned tube type phase change heat storage equipment, including heat storage shell, both ends of heat storage shell are provided with sealing end plate, two sealing end plates are arranged, the inside of heat storage shell between two sealing end plates is provided with partition layer, the middle of heat storage shell is provided with coaxial center flow pipe, the opposite ends of center flow pipe are sealed and penetrated through sealing end plate through sealing sleeve, the space between partition layer and center flow pipe is set as phase change heat storage cavity, the inside of partition layer and the outside of center flow pipe are provided with heat transfer fin, the application belongs to phase change heat storage technical field, the purpose of the application is to solve the problems of low heat storage efficiency and poor equipment stability in prior art, the technical effects are as follows: double flow makes phase change heat storage efficiency improved, double cavity phase change heat storage material is arranged in heat storage equipment, heat storage energy efficiency is high, fin strengthens phase change heat storage and structural support, equipment is stable, and has good sealing and plugging performance.

Description

Technical Field

[0001] The present invention relates to the technical field of phase change heat storage technology, and in particular to a fin-tube type phase change heat storage device. Background Art

[0002] Thermal storage technology is crucial for improving energy efficiency and protecting the environment, addressing the mismatch between thermal energy supply and demand. Phase change thermal storage systems, as an effective means of addressing the time-space conflict in energy supply, are a key approach to improving energy efficiency. Phase change thermal storage can be categorized as solid-liquid, liquid-gas, and solid-gas. However, only solid-liquid phase change has significant practical application value. Thermal storage technology is crucial for improving energy efficiency and protecting the environment, addressing the mismatch between thermal energy supply and demand.

[0003] At present, phase change thermal storage equipment adopts a single central flow tube and phase change thermal storage cavity. The medium flowing through the central flow tube transfers heat in a single direction to the single phase change thermal storage material in the phase change thermal storage cavity through the heat transfer fins to store heat. The single thermal storage phase change material in the single thermal storage cavity has low thermal storage performance and energy efficiency, small heat storage flow contact space and area, poor heat storage efficiency, prone to leakage at the assembly interface of the thermal storage equipment, and poor equipment stability. Summary of the Invention

[0004] To this end, the present invention provides a fin-tube phase-change thermal storage device to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] According to a first aspect of the present invention, a fin-tube phase-change heat storage device comprises a heat storage shell, wherein opposite ends of the heat storage shell are provided with sealed end plates, two sealed end plates are provided, a partition layer is provided inside the heat storage shell between the two sealed end plates, a coaxially arranged central circulation pipe is provided in the middle of the interior of the heat storage shell, opposite ends of the central circulation pipe are sealed and penetrate the sealed end plates by sealing sleeves, a space between the partition layer and the central circulation pipe is provided as a phase-change heat storage cavity, heat transfer fins are provided inside the partition layer and outside the central circulation pipe, an external circulation mechanism is provided on the outer side of the partition layer, one end of the central circulation pipe is provided as an inlet, and the other end of the central circulation pipe is provided as an outlet, an assembly flange is provided on the inlet and the outlet, and an assembly mechanism is provided on the assembly flange;

[0007] A partition plate is provided inside the phase change heat storage cavity, the outer edge of the partition plate is fixedly connected to the inner wall of the partition layer, the side of the partition plate away from the partition layer is fixedly connected to the outer wall of the central flow tube, the interior of the phase change heat storage cavity on the side of the partition plate close to the inlet is set as heat storage cavity No. 1, and the interior of the phase change heat storage cavity on the side of the partition plate close to the outlet is set as heat storage cavity No. 2.

[0008] Furthermore, the heat transfer fins include fin No. 1, fin No. 2 and fin No. 3, the outer wall of the central circulation tube is provided with fin No. 1, the end of fin No. 1 away from the central circulation tube is connected to the inner wall of the partition layer, the inner wall of the partition layer is provided with fin No. 2, the end of fin No. 2 away from the partition layer is provided with fin No. 3, and the end of fin No. 3 away from fin No. 2 is connected to fin No. 1.

[0009] Furthermore, the No. 1 fin, the No. 2 fin and the No. 3 fin are each provided with a corresponding number of fins, and the No. 1 fin, the No. 2 fin and the No. 3 fin are evenly distributed in the phase change heat storage cavity at equal intervals. The No. 2 fin and the No. 3 fin are integrated into a Y-shaped fin, and the No. 1 fin and the Y-shaped fin are staggered.

[0010] Furthermore, a raised groove is provided on the central flow tube between two adjacent No. 1 fins, the number of the raised grooves is set corresponding to the number of No. 1 fins, and the opposite ends of the raised groove are set in an inclined groove structure.

[0011] Furthermore, the external circulation mechanism includes an external circulation chamber, a No. 1 interface, a No. 2 interface, a spiral plate and a spiral circulation channel. The space between the side of the separation layer away from the phase change heat storage chamber and the heat storage shell is set as the external circulation chamber. The No. 1 interface is provided on the heat storage shell near the inlet end of the external circulation chamber, and the No. 2 interface is provided on the heat storage shell near the outlet end of the external circulation chamber. Both the No. 1 interface and the No. 2 interface are provided with assembly flanges. A spiral plate is provided inside the external circulation chamber. The spiral plate divides the internal space of the external circulation chamber into a spiral circulation channel. The opposite ends of the spiral circulation channel are connected to the No. 1 interface and the No. 2 interface.

[0012] Furthermore, the heat storage outer shell includes an outer heat insulation layer, an inner heat insulation layer and a middle interlayer. The inner heat insulation layer is provided inside the outer heat insulation layer, and the middle interlayer is formed between the inner heat insulation layer and the outer heat insulation layer.

[0013] Furthermore, the interior of the middle interlayer is provided with a reinforcing keel and a filling material. The reinforcing keel is arranged in a triangular grid-shaped steel structure. The filling material is provided in the internal space of the reinforcing keel grid. The filling material includes a thermal insulation material layer and a sound insulation material layer.

[0014] Furthermore, the assembly mechanism includes a limiting ring, a sealing filler, a wrapping clamp band and a limiting platform. A limiting ring is provided on the circumferential surface of the assembly flange, a sealing groove is provided on the side of the limiting ring away from the central flow pipe, and a sealing filler is provided in the sealing groove. An assembly hole is provided on the assembly flange, and the assembly flange is assembled with the docking flange through the assembly bolts in the assembly hole. The docking flange and the assembly flange adopt the same structural setting. A wrapping clamp band is provided on the outer side of the assembly flange and the docking flange, and a limiting platform is provided on the inside of the wrapping clamp band. The limiting platform is arranged inside the limiting ring.

[0015] Furthermore, a sealing pressure ring is provided on the end surface of the assembly flange away from the central flow pipe, and a sealing ring is clamped inside the sealing pressure ring between the assembly flange and the docking flange.

[0016] Furthermore, the wrapping clamp band and the limit platform are made of high-strength and high-plasticity materials, the wrapping clamp band is arranged in a notched ring structure, and a locking plate is integrally provided at the notched end of the wrapping clamp band.

[0017] The present invention has the following advantages:

[0018] 1. This fin-tube phase-change thermal storage device forms an outer flow cavity between the partition layer and the thermal storage shell by means of a partition layer provided in the thermal storage shell. A spiral flow channel is formed in the outer flow cavity by means of a spiral plate. This channel cooperates with the central flow tube to realize both internal and external dual flow functions of the phase-change thermal storage cavity. This increases the thermal storage flow space and area in contact with the phase-change thermal storage material, thereby improving the phase-change thermal storage efficiency. In addition, the partition plate separates the phase-change thermal storage cavity into the first and second thermal storage cavities, realizing a dual-cavity phase-change thermal storage material configuration in the thermal storage device, resulting in higher thermal storage energy efficiency.

[0019] 2. This fin-tube phase-change thermal storage device consists of fin No. 1, fin No. 2, and fin No. 3, which are arranged inside the phase-change thermal storage cavity. Fin No. 2 and fin No. 3 are arranged in a Y-shaped fin structure to increase the contact area between the fins and the phase-change thermal storage material, making the phase-change thermal storage more efficient. The fins have the dual functions of enhancing phase-change thermal storage and strengthening structural support, and the double-circulation thermal storage device has a more stable structural strength.

[0020] 3. This fin-tube phase-change heat storage device is easy to assemble and firm, and has good sealing and plugging performance, through the assembly flange and assembly mechanism set on the central circulation pipe, the limit ring and the wrapped clamp belt, combined with the sealing ring set in the sealing pressure ring and the sealing filler set in the sealing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0022] Figure 2A schematic structural diagram of a central flow tube in a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0023] Figure 3 A schematic structural diagram of a phase change thermal storage cavity in a fin-tube phase change thermal storage device provided in some embodiments of the present invention.

[0024] Figure 4 A schematic structural diagram of the inner and outer flow chambers of a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0025] Figure 5 A schematic structural diagram of heat transfer fins in a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0026] Figure 6 A schematic structural diagram of fin No. 1 in a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0027] Figure 7 A schematic structural diagram of a limiting ring in a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0028] Figure 8 A schematic structural diagram of an assembly flange in a fin-tube phase-change thermal storage device provided in some embodiments of the present invention.

[0029] In the figure: 1. Heat storage shell; 11. Outer insulation layer; 12. Inner insulation layer; 13. Middle interlayer; 2. Sealing end plate; 3. Partition layer; 4. Phase change heat storage cavity; 41. Heat storage cavity No. 1; 42. Heat storage cavity No. 2; 5. Central flow pipe; 51. Inlet; 52. Outlet; 53. Raised groove; 54. Assembly flange; 541. Limiting ring; 542. Sealing pressure ring; 543. Sealing filler; 544. Wrapping clamp band; 545. Limiting platform; 6. Heat transfer fin; 61. Fin No. 1; 62. Fin No. 2; 63. Fin No. 3; 7. Partition plate; 8. External flow cavity; 81. Interface No. 1; 82. Interface No. 2; 83. Spiral plate; 84. Spiral flow channel. DETAILED DESCRIPTION

[0030] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1 to 8 As shown, a fin-tube phase change heat storage device in an embodiment of the first aspect of the present invention comprises a heat storage shell 1, wherein sealing end plates 2 are provided at opposite ends of the heat storage shell 1, and two sealing end plates 2 are provided. A partition layer 3 is provided inside the heat storage shell 1 between the two sealing end plates 2, and a coaxial central circulation pipe 5 is provided in the middle of the interior of the heat storage shell 1, and opposite ends of the central circulation pipe 5 are sealed and penetrate the sealing end plates 2 through sealing sleeves, and the space between the partition layer 3 and the central circulation pipe 5 is set as a phase change heat storage cavity 4, and heat transfer fins 6 are provided inside the partition layer 3 and outside the central circulation pipe 5, and an external circulation mechanism is provided on the outside of the partition layer 3, one end of the central circulation pipe 5 is set as an inlet 51, and the other end of the central circulation pipe 5 is set as an outlet 52, and both the inlet 51 and the outlet 52 are provided with an assembly flange 54, and the assembly flange 54 is provided with an assembly mechanism;

[0033] In the above embodiment, it should be noted that a partition plate 7 is provided inside the phase change heat storage cavity 4, the outer side of the partition plate 7 is fixedly connected to the inner wall of the partition layer 3, and the side of the partition plate 7 away from the partition layer 3 is fixedly connected to the outer wall of the central flow tube 5, and the interior of the phase change heat storage cavity 4 on the side of the partition plate 7 close to the inlet 51 is set as the No. 1 heat storage cavity 41, and the interior of the phase change heat storage cavity 4 on the side of the partition plate 7 close to the outlet 52 is set as the No. 2 heat storage cavity 42, and the interiors of the No. 1 heat storage cavity 41 and the No. 2 heat storage cavity 42 are filled with phase change heat storage materials with different heat storage properties.

[0034] The technical effects achieved by the above embodiment are as follows: by setting the partition layer 3 in the heat storage shell 1, an outer flow cavity 8 is formed between the partition layer 3 and the heat storage shell 1, and cooperating with the central flow pipe 5, the internal and external dual flow functions of the phase change heat storage cavity 4 are realized, the heat storage flow space and area contacting with the phase change heat storage material are increased, and the phase change heat storage efficiency is improved. In addition, the partition plate 7 separates the first heat storage cavity 41 and the second heat storage cavity 42 of the phase change heat storage cavity 4 of the partition layer 3, realizing the dual-cavity phase change heat storage material setting of the heat storage equipment, and the heat storage energy efficiency is higher. The heat storage medium flows through the central flow pipe 5 and the outer flow cavity 8, and the heat transfer fins 6 are used to phase-change heat storage the medium flowing in the central flow pipe 5 and the outer flow cavity 8 with the phase change heat storage material in the phase change heat storage cavity 4.

[0035] Example 2

[0036] like Figures 1 to 8As shown, a fin-tube phase change heat storage device includes all the contents of Example 1. In addition, the heat transfer fin 6 includes fin No. 1 61, fin No. 2 62 and fin No. 3 63. The outer wall of the central circulation tube 5 is provided with fin No. 1 61, and the end of fin No. 1 61 away from the central circulation tube 5 is connected to the inner wall of the partition layer 3. The inner wall of the partition layer 3 is provided with fin No. 2 62, and the end of fin No. 2 62 away from the partition layer 3 is provided with fin No. 3 63, and the end of fin No. 3 63 away from fin No. 2 62 is connected to fin No. 1 61.

[0037] The No. 1 fin 61, the No. 2 fin 62 and the No. 3 fin 63 are each provided with a corresponding number of fins. The No. 1 fin 61, the No. 2 fin 62 and the No. 3 fin 63 are evenly distributed in the phase change heat storage cavity 4 at equal intervals. The No. 2 fin 62 and the No. 3 fin 63 form a Y-shaped fin as a whole, and the No. 1 fin 61 and the Y-shaped fin are staggered.

[0038] The technical effect achieved by the above embodiment is as follows: the heat transfer fins 6 arranged inside the phase change heat storage cavity 4 are composed of fin No. 1 61, fin No. 2 62 and fin No. 3 63, and the fin No. 2 62 and fin No. 3 63 are arranged in a Y-shaped fin structure, which increases the contact area between the fins and the phase change heat storage material, and the phase change heat storage is more efficient. The fins have the dual functions of strengthening phase change heat storage and strengthening structural support, and the structural strength of the double-circulation heat storage equipment is more stable.

[0039] Example 3

[0040] like Figures 1 to 8 As shown, a fin-tube phase change heat storage device includes all the contents of Example 2. In addition, a raised groove 53 is provided on the central flow tube 5 between two adjacent No. 1 fins 61. The number of the raised grooves 53 is set corresponding to the number of No. 1 fins 61, and the opposite ends of the raised grooves 53 are set in an inclined groove structure.

[0041] The technical effect achieved by the above embodiment is as follows: the raised groove 53 can increase the circulation space inside the central circulation tube 5, slow down the flow rate of the medium in the central circulation tube 5, and increase the heat storage time. At the same time, the outwardly protruding raised groove 53 increases the contact area with the phase change material in the phase change heat storage cavity 4.

[0042] Example 4

[0043] like Figures 1 to 8As shown, a fin-tube phase change heat storage device includes all the contents of Example 3. In addition, the external circulation mechanism includes an external circulation chamber 8, a No. 1 interface 81, a No. 2 interface 82, a spiral plate 83 and a spiral circulation channel 84. The space between the side of the partition layer 3 away from the phase change heat storage chamber 4 and the heat storage shell 1 is set as the external circulation chamber 8. The No. 1 interface 81 is provided on the heat storage shell 1 at the end of the external circulation chamber 8 close to the inlet 51, and the No. 2 interface 82 is provided on the heat storage shell 1 at the end of the external circulation chamber 8 close to the outlet 52. Both the No. 1 interface 81 and the No. 2 interface 82 are provided with an assembly flange 54. A spiral plate 83 is provided inside the external circulation chamber 8. The spiral plate 83 divides the internal space of the external circulation chamber 8 to form a spiral circulation channel 84. The opposite ends of the spiral circulation channel 84 are connected to the No. 1 interface 81 and the No. 2 interface 82.

[0044] The technical effect achieved by the above embodiment is as follows: a spiral circulation channel 84 is formed in the external circulation cavity 8 by the spiral plate 83, and the medium entering through the No. 1 interface 81 circulates in a spiral shape in the spiral circulation channel 84. The medium in the spiral circulation channel 84 cooperates with the heat transfer fins 6 to circulate the phase change material inside the phase change heat storage cavity 4 for external circulation heat storage, thereby further increasing the contact area, contact space and contact time of the phase change heat storage.

[0045] Example 5

[0046] like Figures 1 to 8 As shown, a fin-tube phase change heat storage device includes all the contents of Example 4. In addition, the heat storage shell 1 includes an outer insulation layer 11, an inner insulation layer 12 and a middle interlayer 13. The inner insulation layer 12 is provided inside the outer insulation layer 11, and the middle interlayer 13 is formed between the inner insulation layer 12 and the outer insulation layer 11.

[0047] The interior of the middle interlayer 13 is provided with a reinforcing keel and a filling material. The reinforcing keel is arranged in a triangular grid-shaped steel structure. The filling material is provided in the internal space of the reinforcing keel grid. The filling material includes a thermal insulation material layer and a sound insulation material layer.

[0048] The technical effect achieved by the above embodiment is: the heat storage shell 1 composed of the outer insulation layer 11, the inner insulation layer 12 and the middle interlayer 13 has good insulation, heat preservation and sound insulation properties, reduces heat loss and reduces the noise of medium heat storage circulation.

[0049] Example 6

[0050] like Figures 1 to 8As shown, a fin-tube phase change heat storage device includes all the contents of Example 5. In addition, the assembly mechanism includes a limiting ring 541, a sealing filler 543, a wrapping clamp band 544 and a limiting platform 545. A limiting ring 541 is provided on the circumferential surface of the assembly flange 54. A sealing groove is provided on the side of the limiting ring 541 away from the central flow pipe 5, and a sealing filler 543 is provided in the sealing groove. An assembly hole is provided on the assembly flange 54. The assembly flange 54 is assembled with the docking flange through the assembly bolts in the assembly hole. The docking flange and the assembly flange 54 adopt the same structural setting. A wrapping clamp band 544 is provided on the outer side of the assembly flange 54 and the docking flange. A limiting platform 545 is provided inside the wrapping clamp band 544. The limiting platform 545 is arranged inside the limiting ring 541.

[0051] A sealing pressure ring 542 is provided on the end surface of the assembly flange 54 away from the central flow pipe 5 , and a sealing ring is clamped inside the sealing pressure ring 542 between the assembly flange 54 and the docking flange.

[0052] The wrapping clamp band 544 and the limiting platform 545 are made of high-strength and high-plasticity materials. The wrapping clamp band 544 is arranged in a notched ring structure, and a locking plate is integrally provided at the notched end of the wrapping clamp band 544 .

[0053] The technical effect achieved by the above embodiment is as follows: when the phase change heat storage device is assembled, the inlet 51 and the outlet 52 of the central flow pipe 5, and the No. 1 interface 81 and the No. 2 interface 82 on the outer flow chamber 8 are connected to the docking flange of the phase change heat storage medium supply device through the assembly flange 5 and the assembly mechanism. The assembly flange 54 is assembled with the docking flange through the assembly bolts in the assembly hole. The wrapping clamp band 544 is wrapped around the outer circumferential surface of the assembly flange 5 and the docking flange. At the same time, the limit platform 545 on the wrapping clamp band 544 is clamped in the assembly. The sealing filler 543 is sealed in the limiting ring 541 of the assembly flange 5 and the docking flange, and the locking plate and the locking bolt cooperate to fasten the wrapping clamp 544 around the assembly flange 5 and the docking flange. The wrapping clamp 544 wraps and fixes the sealing filler 543, and a sealing ring is pressed in the sealing pressure ring 541 between the assembly flange 5 and the docking flange, so that the heat storage equipment is easy and firm to assemble, and has good sealing and blocking performance, and the blocking filler 543 is easy to replace.

Claims

1. A fin-tube phase-change heat storage device, comprising a heat storage housing (1), characterized in that: The heat storage shell (1) is provided with sealing end plates (2) at both opposite ends, and two sealing end plates (2) are provided. A separation layer (3) is provided inside the heat storage shell (1) between the two sealing end plates (2). A coaxially arranged central circulation pipe (5) is provided in the middle of the heat storage shell (1). The opposite ends of the central circulation pipe (5) are sealed through the sealing end plates (2) by sealing sleeves. The space between the separation layer (3) and the central circulation pipe (5) is provided as a phase change heat storage cavity (4). Heat transfer fins (6) are provided inside the separation layer (3) and outside the central circulation pipe (5). An external circulation mechanism is provided on the outside of the separation layer (3). One end of the central circulation pipe (5) is provided as an inlet (51), and the other end of the central circulation pipe (5) is provided as an outlet (52). Both the inlet (51) and the outlet (52) are provided with assembly flanges (54), and an assembly mechanism is provided on the assembly flange (54). A partition plate (7) is provided inside the phase-change heat storage cavity (4), the outer side of the partition plate (7) is fixedly connected to the inner wall of the partition layer (3), the side of the partition plate (7) away from the partition layer (3) is fixedly connected to the outer wall of the central flow tube (5), the interior of the phase-change heat storage cavity (4) on the side of the partition plate (7) close to the inlet (51) is set as the first heat storage cavity (41), and the interior of the phase-change heat storage cavity (4) on the side of the partition plate (7) close to the outlet (52) is set as the second heat storage cavity (42); The heat transfer fins (6) include a No. 1 fin (61), a No. 2 fin (62), and a No. 3 fin (63); the outer wall of the central circulation tube (5) is provided with the No. 1 fin (61); the end of the No. 1 fin (61) away from the central circulation tube (5) is connected to the inner wall of the partition layer (3); the inner wall of the partition layer (3) is provided with the No. 2 fin (62); the end of the No. 2 fin (62) away from the partition layer (3) is provided with the No. 3 fin (63); the end of the No. 3 fin (63) away from the No. 2 fin (62) is connected to the No. 1 fin (61); The first fin (61), the second fin (62) and the third fin (63) are each provided with a corresponding number of fins, the first fin (61), the second fin (62) and the third fin (63) are evenly distributed in the phase change heat storage cavity (4) at equal intervals, the second fin (62) and the third fin (63) form a Y-shaped fin as a whole, and the first fin (61) and the Y-shaped fin are staggered and arranged; A raised groove (53) is provided on the central flow tube (5) between two adjacent No. 1 fins (61). The number of the raised grooves (53) is set corresponding to the number of the No. 1 fins (61). The opposite ends of the raised grooves (53) are set in an inclined groove structure.

2. The fin-tube phase change thermal storage device according to claim 1, characterized in that: The external circulation mechanism comprises an external circulation chamber (8), a No. 1 interface (81), a No. 2 interface (82), a spiral plate (83) and a spiral circulation channel (84); the space between the side of the separation layer (3) away from the phase change heat storage chamber (4) and the heat storage shell (1) is set as the external circulation chamber (8); the No. 1 interface (81) is provided on the heat storage shell (1) at one end of the external circulation chamber (8) close to the inlet (51); the No. 2 interface (82) is provided on the heat storage shell (1) at one end of the external circulation chamber (8) close to the outlet (52); the No. 1 interface (81) and the No. 2 interface (82) are both provided with an assembly flange (54); the interior of the external circulation chamber (8) is provided with a spiral plate (83); the spiral plate (83) separates the internal space of the external circulation chamber (8) to form a spiral circulation channel (84); the opposite ends of the spiral circulation channel (84) are connected to the No. 1 interface (81) and the No. 2 interface (82).

3. The fin-tube phase change thermal storage device according to claim 1, characterized in that: The heat storage shell (1) comprises an outer heat-insulating layer (11), an inner heat-insulating layer (12), and a middle interlayer (13); the inner heat-insulating layer (12) is provided inside the outer heat-insulating layer (11); and the middle interlayer (13) is formed between the inner heat-insulating layer (12) and the outer heat-insulating layer (11).

4. The fin-tube phase-change thermal storage device according to claim 3, characterized in that: A reinforcing keel and a filling material are provided inside the middle interlayer (13); the reinforcing keel is arranged in a triangular grid-shaped steel bar structure; a filling material is provided in the internal space of the reinforcing keel grid; the filling material includes a heat-insulating material layer and a sound-insulating material layer.

5. The fin-tube phase-change thermal storage device according to claim 1, characterized in that: The assembly mechanism comprises a limiting ring (541), a blocking filler (543), a wrapping clamp band (544) and a limiting platform (545); a limiting ring (541) is provided on the circumferential surface of the assembly flange (54); a blocking groove is provided on the side of the limiting ring (541) away from the central flow pipe (5); a blocking filler (543) is provided in the blocking groove; an assembly hole is provided on the assembly flange (54); the assembly flange (54) is assembled with the docking flange through the assembly bolts in the assembly hole; the docking flange and the assembly flange (54) adopt the same structural setting; a wrapping clamp band (544) is provided on the outer side of the assembly flange (54) and the docking flange; a limiting platform (545) is provided inside the wrapping clamp band (544); and the limiting platform (545) is provided inside the limiting ring (541).

6. The fin-tube phase-change thermal storage device according to claim 5, characterized in that: A sealing pressure ring (542) is provided on the end surface of the assembly flange (54) away from the central flow pipe (5), and a sealing ring is clamped inside the sealing pressure ring (542) between the assembly flange (54) and the mating flange.

7. The fin-tube phase-change thermal storage device according to claim 5, characterized in that: The wrapping clamp band (544) and the limiting platform (545) are made of high-strength and high-plasticity materials. The wrapping clamp band (544) is arranged in a notched ring structure. A locking plate is integrally provided at the notched end of the wrapping clamp band (544).

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