Fabricated energy storage water tank with wrinkle type phase change heat storage ball

Abstract

The application discloses an assembled wrinkle type phase change heat storage ball energy storage water tank, which comprises a heat preservation tank body, an H-shaped water distributor, a water distribution grid and phase change heat storage balls, the heat preservation tank body is a stainless steel tank body, the outer wall is wrapped with heat preservation materials, the H-shaped water distributor comprises an upper water distributor water supply pipe, an H-shaped upper water distributor, a lower water distributor return pipe and an H-shaped lower water distributor, the H-shaped upper water distributor is fixed with the upper water distributor water supply pipe and arranged on the upper portion of the heat preservation tank body, the H-shaped lower water distributor is fixed with the lower water distributor return pipe and arranged on the lower portion of the heat preservation tank body, and the phase change heat storage balls are tightly stacked in the heat preservation tank body. The upper water distributor water supply pipe, the lower water distributor return pipe, the H-shaped upper water distributor, the H-shaped lower water distributor and the water distribution grid are arranged in the heat preservation tank body, so that the water body is uniformly distributed in each corner of the tank body, the dead angle area of the tank body is greatly reduced, the phase change heat storage balls in the tank body can fully contact with the water body, and the heat exchange effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of phase change energy storage air conditioners, and in particular to an assembled pleated phase change heat storage ball energy storage water tank. Background Art

[0002] The development and utilization of "green electricity" generated by renewable energy has gradually been scaled up. Its inherent characteristics of timeliness and discontinuity, coupled with the diurnal periodicity of building cooling and heating loads and the uneven seasonal distribution throughout the year, have exacerbated the imbalance between energy production and energy demand. Energy storage devices use "cold and heat to store electricity" to achieve time transfer of energy by decoupling the use and production of cold and heat, and have become an important flexible resource for the effective absorption of renewable energy. Phase change energy storage tanks, as a form of energy storage device, can simultaneously store sensible heat and latent heat. Under the condition of the same heat consumption, the use of phase change materials can reduce the volume of the water tank and save building space.

[0003] However, during the heat storage and release process, the internal thermal stratification effect of the phase change energy storage water tank is poor, and there is a heat exchange dead zone where the heat exchange between the water and the phase change material is insufficient. In addition, the phase change material expands or contracts during the heat storage and release process, causing ball wall fatigue, resulting in a short service life of the phase change material; therefore, it does not meet the existing needs. For this reason, we propose an assembled pleated phase change heat storage ball energy storage water tank. Summary of the Invention

[0004] The purpose of the present invention is to provide an assembled corrugated phase change heat storage ball energy storage water tank to solve the problems raised in the above background technology, such as poor thermal stratification effect inside the phase change energy storage water tank during the heat storage and release process, the existence of heat exchange dead zones where heat exchange between water and phase change material is insufficient, and the phase change material expands or contracts during the heat storage and release process, causing ball wall fatigue, resulting in a short service life of the phase change material.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an assembled pleated phase-change heat storage ball energy storage water tank, comprising an insulation box, an H-shaped water distributor, a water distribution grid, and phase-change heat storage balls, wherein the insulation box is a stainless steel box with an outer wall wrapped with insulation material;

[0006] The H-type water distributor comprises an upper water distributor water supply pipe, an H-type upper water distributor, a lower water distributor return pipe, and an H-type lower water distributor. The H-type upper water distributor is fixed to the upper water distributor water supply pipe and is arranged on the upper part of the insulation box body. The H-type lower water distributor is fixed to the lower water distributor return pipe and is arranged on the lower part of the insulation box body. The upper water distributor water supply pipe and the lower water distributor return pipe each have an input end and four output ends. The output ends of the upper water distributor water supply pipe and the lower water distributor return pipe are both located inside the insulation box body. The input end of the upper water distributor water supply pipe penetrates the insulation box body and extends to the insulation box body. Inside the body, the input end of the return pipe of the lower water distributor penetrates the insulation box and extends to the outside of the insulation box. There are four H-shaped upper water distributors and serve as the four output ends of the upper water distributor water supply pipe. The H-shaped upper water distributor is horizontally connected to the upper water distributor water supply pipe. There are four H-shaped lower water distributors and serve as the four output ends of the lower water distributor return pipe. The H-shaped lower water distributor is horizontally connected to the lower water distributor return pipe. The upper water distributor water supply pipe, the H-shaped upper water distributor and the lower water distributor return pipe, and the H-shaped lower water distributor are respectively fixed to the top and bottom of the insulation box through hangers and supports;

[0007] The water distribution grid is arranged on the upper part of the insulation box body, and the water distribution grid is located below the water supply pipe of the upper water distributor and the H-type upper water distributor. The water distribution grid is detachably connected to the four walls of the insulation box body by screws. Several phase change heat storage balls are arranged between the water distribution grid and the return pipe of the lower water distributor and the H-type lower water distributor.

[0008] Preferably, the water distribution grid is a vinyl plate, and a surface of the water distribution grid is provided with a plurality of square holes distributed in a rectangular array.

[0009] Preferably, a sewage outlet is fixedly connected to the rear side of the bottom end of the heat preservation box body, and a water supply port and an overflow port are fixedly connected to the front side of the top end of the heat preservation box body.

[0010] Preferably, the phase change heat storage ball is made of high-density polyethylene, the wall thickness of the phase change heat storage ball is 1 mm and a 20°C to 60°C phase change heat storage material is encapsulated inside.

[0011] Preferably, the outer surface of the phase-change heat storage ball is provided with corrugated folds and two sinking grooves, the two sinking grooves are symmetrically positioned, and the corrugated folds are evenly arranged on the outer surface of the phase-change heat storage ball.

[0012] Preferably, a plurality of phase-change heat storage balls are stacked closely, and adjacent phase-change heat storage balls are restricted to each other by the sinking grooves.

[0013] Preferably, two symmetrically distributed limiting components are installed inside the insulation box, and the limiting components are located between the frontmost and rearmost phase change heat storage balls and the insulation box, and the limiting components are connected to the phase change heat storage balls through sinking grooves.

[0014] Preferably, the limiting assembly includes two vertically symmetrical supporting cross bars, and a plurality of elastic limiting longitudinal bars distributed at equal intervals are fixed between the two supporting cross bars. Adsorption magnets are fixed at both end portions of the supporting cross bars. The supporting cross bars are adsorbed on the inner side of the insulation box through the adsorption magnets, and the elastic limiting longitudinal bars are clamped on the inner side of the sinking groove on the outer surface of the phase change heat storage ball.

[0015] Preferably, the elastic limiting longitudinal rod includes a telescopic protective jacket, both ends of which are respectively fixed to two supporting cross bars, the telescopic protective jacket is made of rubber, and a plurality of linearly arranged reset assist magnets are provided inside the telescopic protective jacket.

[0016] Preferably, a telescopic cavity is provided between the resetting aid magnets, with a diameter of four-fifths the diameter of the telescopic protective jacket. The magnetic attraction between the resetting aid magnets gathers all the phase-change thermal storage balls toward the center after they contract, preventing adjacent phase-change thermal storage balls from separating due to the reduction in volume, thereby preventing the phase-change thermal storage balls from rolling within the insulation box.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention arranges a plurality of phase-change heat storage balls inside a heat-insulating box, and achieves heat storage and heat release in the energy storage water tank by allowing the 20°C to 60°C phase-change heat storage material encapsulated inside the phase-change heat storage balls to absorb heat and expand and release heat and contract. The wall thickness of the phase-change heat storage balls is 1 mm, which can increase the heat transfer coefficient of the phase-change heat storage balls. The outer surface of the phase-change heat storage balls is provided with a sinking groove, which can reduce the center distance to the ball center, and the corrugated folds can increase the heat transfer area, thereby causing the phase-change material in the phase-change heat storage balls to solidify or melt quickly, thereby improving the heat storage and heat release rates of the energy storage water tank. The outer surface of the phase-change heat storage balls is provided with sinking grooves and corrugated folds, which reduce ball wall fatigue caused by expansion or contraction of the phase-change heat storage balls during heat storage and release, thereby extending the service life of the phase-change heat storage balls.

[0019] 2. The present invention installs an upper water distributor water supply pipe, a lower water distributor return pipe, an H-shaped upper water distributor, an H-shaped lower water distributor and a water distribution grid inside the insulation box, so that the water is evenly distributed in every corner of the box, greatly reducing the dead corner area of ​​the box, ensuring that the phase change heat storage balls in the box can fully contact the water, and enhancing the heat exchange effect;

[0020] 3. The present invention stacks several phase-change heat storage balls tightly, and adjacent phase-change heat storage balls restrict each other through sinking grooves, thereby preventing the phase-change heat storage balls from rolling disorderly inside the insulation box due to water flow impact.

[0021] 4. The present invention uses elastic limiting longitudinal bars between two symmetrical supporting cross bars to limit the phase-change heat storage balls located at the front and rear, so that the phase-change heat storage balls in the insulation box are neatly stacked. The elastic limiting longitudinal bars can elastically extend when the phase-change heat storage balls expand, without affecting the expansion of the phase-change heat storage balls. After the phase-change heat storage balls contract, the elastic limiting longitudinal bars are restored by the magnetic attraction between the internal reset auxiliary magnets, so that the phase-change heat storage balls between the two limiting components are gathered, ensuring the stable position of the phase-change heat storage balls inside the insulation box.

[0022] 5. The thermal insulation box, H-type water distributor, water distribution grid and phase change heat storage ball of the present invention are integrated products, which can be factory-produced and can be spliced ​​on the construction site according to the actual thermal storage installed capacity requirements of the project, greatly reducing the construction period and ensuring the construction and installation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0024] Figure 2 This is a schematic diagram of the structure of the thermal insulation box of the present invention;

[0025] Figure 3 Schematic diagram of the structure of the first embodiment of the present invention;

[0026] Figure 4 2 is a schematic structural diagram of a second embodiment of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the phase-change thermal storage ball of the present invention;

[0028] Figure 6 This is a schematic diagram of the installation of the phase change thermal storage ball on the horizontal plane of the present invention;

[0029] Figure 7 This is a schematic diagram of the assembly structure of the water supply pipe of the upper water distributor and the H-shaped upper water distributor of the present invention;

[0030] Figure 8 Schematic diagram of the assembly structure of the return pipe of the lower water distributor and the H-type lower water distributor of the present invention;

[0031] Figure 9 This is a schematic structural diagram of the water distribution grid of the present invention;

[0032] Figure 10 This is a schematic diagram of the connection between the limiting assembly and the thermal insulation box of the present invention;

[0033] Figure 11 Schematic diagram of the structure of the limit assembly of the present invention;

[0034] Figure 12 It is a structural schematic diagram of the elastic limiting longitudinal rod of the present invention.

[0035] In the figure: 1. Insulation box body; 2. Water supply pipe of upper water distributor; 3. Water replenishment port; 4. Overflow port; 5. Return pipe of lower water distributor; 6. Sewage outlet; 7. H-type upper water distributor; 8. H-type lower water distributor; 9. Water distribution grid; 10. Phase change heat storage ball; 11. Settlement groove; 12. Corrugated folds; 13. Limiting assembly; 131. Support cross bar; 132. Adsorption magnet; 133. Elastic limiting longitudinal rod; 1331. Telescopic protective cover; 1332. Reset aid magnet; 1333. Telescopic cavity. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] The first embodiment Figures 1 to 3 、 Figures 5 to 9 As shown, an assembled pleated phase change thermal storage ball energy storage water tank includes an insulation box body 1, an H-shaped water distributor, and a water distribution grid 9. The insulation box body 1 is a stainless steel box body, and the outer wall is wrapped with insulation material.

[0038] A sewage outlet 6 is fixedly connected to the rear side of the bottom end of the insulation box body 1, and a water supply port 3 and an overflow port 4 are fixedly connected to the front side of the top end of the insulation box body 1. The sewage inside the insulation box body 1 is discharged through the sewage outlet 6 to prevent the sewage from remaining inside the insulation box body 1 and polluting the energy storage water tank, while the water supply port 3 can add water from the outside of the insulation box body 1 to the inside of the insulation box body 1, and the overflow port 4 can ensure that excess water inside the insulation box body 1 overflows, thereby preventing the water pressure inside the insulation box body 1 from being too high.

[0039] The H-type water distributor includes an upper water distributor water supply pipe 2, an H-type upper water distributor 7, a lower water distributor return pipe 5, and an H-type lower water distributor 8. The H-type upper water distributor 7 is fixed to the upper water distributor water supply pipe 2 and is arranged on the upper part of the insulation box 1. The H-type lower water distributor 8 is fixed to the lower water distributor return pipe 5 and is arranged on the lower part of the insulation box 1. The upper water distributor water supply pipe 2 and the lower water distributor return pipe 5 each have an input end and four output ends. The output ends of the upper water distributor water supply pipe 2 and the lower water distributor return pipe 5 are both located inside the insulation box 1. The input end of the upper water distributor water supply pipe 2 penetrates the insulation box 1 and extends to the insulation box Inside the body 1, the input end of the lower water distributor return pipe 5 penetrates the insulation box body 1 and extends to the outside of the insulation box body 1. There are four H-type upper water distributors 7 and serve as the four output ends of the upper water distributor water supply pipe 2. The H-type upper water distributor 7 is horizontally connected to the upper water distributor water supply pipe 2. There are four H-type lower water distributors 8 and serve as the four output ends of the lower water distributor return pipe 5. The H-type lower water distributor 8 is horizontally connected to the lower water distributor return pipe 5. The upper water distributor supply pipe 2, the H-type upper water distributor 7 and the lower water distributor return pipe 5, and the H-type lower water distributor 8 are respectively fixed to the top and bottom of the insulation box body 1 through hangers and supports.

[0040] The water distribution grille 9 is arranged on the upper part of the insulation box 1, and the water distribution grille 9 is located below the upper water distributor water supply pipe 2 and the H-type upper water distributor 7. The water distribution grille 9 is detachably connected to the four walls of the insulation box 1 by screws. A number of phase change heat storage balls 10 are arranged between the water distribution grille 9 and the lower water distributor return pipe 5 and the H-type lower water distributor 8. The phase change heat storage balls 10 are tightly stacked, and the adjacent phase change heat storage balls 10 are restricted by the sinking groove 11 to prevent the phase change heat storage balls 10 from rolling disorderly inside the insulation box 1 due to the impact of water flow. The water distribution grille 9 is a vinyl plate, and the surface of the water distribution grille 9 is provided with a plurality of square holes distributed in a rectangular array. The water distribution grille 9 and the insulation box 1 are used to restrict the several phase change heat storage balls 10 placed inside to prevent the phase change heat storage balls 10 from floating to the upper water distributor water supply pipe 2 and the H-type upper water distributor 7 during the heat storage process.

[0041] The material of the phase change heat storage ball 10 is high-density polyethylene. The wall thickness of the phase change heat storage ball 10 is 1 mm and a 20°C to 60°C phase change heat storage material is encapsulated inside the phase change heat storage ball 10. The 20°C to 60°C phase change heat storage material encapsulated inside the phase change heat storage ball 10 absorbs heat and expands and releases heat and contracts, thereby realizing heat storage and heat release of the energy storage tank. The wall thickness of the phase change heat storage ball 10 is 1 mm, which can increase the heat transfer coefficient of the phase change heat storage ball 10. The outer surface of the phase change heat storage ball is provided with a sinking groove which can reduce the center distance to the center of the ball, and the corrugated folds can increase the heat transfer area, thereby causing the phase change material in the phase change heat storage ball to solidify or melt quickly.

[0042] The outer surface of the phase-change heat storage ball 10 is provided with corrugated folds 12 and two sinking grooves 11. The two sinking grooves 11 are symmetrically positioned, and the corrugated folds 12 are evenly arranged on the outer surface of the phase-change heat storage ball 10. The presence of the sinking grooves 11 and the corrugated folds 12 can increase the surface area of ​​the phase-change heat storage ball 10 and provide the phase-change heat storage ball 10 with sufficient expansion space when the phase-change heat storage ball 10 absorbs heat and expands, thereby reducing the fatigue of the ball wall caused by expansion or contraction of the phase-change heat storage ball 10 during the heat storage and release process, and extending the service life of the phase-change heat storage ball 10.

[0043] The second embodiment Figure 1 、 Figure 2 、 Figure 4 、 Figure 9 and Figure 10 As shown, two symmetrically distributed limiting assemblies 13 are installed inside the heat preservation box 1. The limiting assemblies 13 are located between the phase change heat storage balls 10 at the front and rear sides and the heat preservation box 1. The limiting assemblies 13 are connected to the phase change heat storage balls 10 through the sinking grooves 11. The limiting assemblies 13 are used to limit the stacked phase change heat storage balls 10 from the front and rear sides of the phase change heat storage balls 10, ensuring that the stacked phase change heat storage balls 10 have a compact structure and will not move due to the impact of water flow. At the same time, the limiting assemblies 13 do not affect the expansion of the phase change heat storage balls 10.

[0044] The limiting assembly 13 includes two vertically symmetrical supporting cross bars 131, and a plurality of elastic limiting longitudinal bars 133 distributed at equal intervals are fixed between the two supporting cross bars 131. Adsorption magnets 132 are fixed to both ends of the supporting cross bars 131. The supporting cross bars 131 are adsorbed on the inner side of the thermal insulation box 1 through the adsorption magnets 132, and the elastic limiting longitudinal bars 133 are clamped on the inner side of the sinking groove 11 on the outer surface of the phase change heat storage ball 10. The phase change heat storage ball 10 is restricted by the elastic limiting longitudinal bars 133 to ensure that the phase change heat storage ball 10 cannot rotate or move on the horizontal plane, but does not affect the expansion or contraction of the phase change heat storage ball 10.

[0045] The elastic limiting longitudinal rod 133 includes a telescopic protective jacket 1331, and the two end portions of the telescopic protective jacket 1331 are respectively fixed to the two supporting cross bars 131. The material of the telescopic protective jacket 1331 is rubber. A plurality of linearly arranged reset assist magnets 1332 are provided inside the telescopic protective jacket 1331. A telescopic cavity 1333 is provided between the reset assist magnets 1332 and the reset assist magnets 1332. The diameter of the telescopic cavity 1333 is four-fifths of the diameter of the telescopic protective jacket 1331. By utilizing the magnetic attraction between the reset assist magnets 1332 and the reset assist magnets 1332, all the phase change heat storage balls 10 are gathered to the middle after the phase change heat storage balls 10 shrink, so as to avoid the separation of adjacent phase change heat storage balls 10 due to the reduction in shrinkage volume, thereby preventing the phase change heat storage balls 10 from rolling inside the insulation box 1.

[0046] Working principle: When the energy storage water tank is storing heat, high-temperature water flows into the interior of the insulation box 1 through the upper water distributor water supply pipe 2 and the H-type upper water distributor 7, so that the high-temperature water immerses all the phase-change heat storage balls 10 placed inside the insulation box 1. Since the phase-change heat storage balls 10 have thin walls, small center distances, and large heat transfer areas, the phase-change heat storage materials encapsulated inside the immersed phase-change heat storage balls 10 exchange heat with the high-temperature water. During this process, the solid phase-change heat storage material absorbs heat and gradually melts from the outside to the inside. The melted phase-change heat storage material expands and makes the corrugated folds 12 on the outer surface of the phase-change heat storage ball 10 gradually smooth, until all the phase-change heat storage materials are melted and the temperature of the phase-change heat storage material is basically the same as the temperature of the high-temperature water. After the heat exchange, the temperature of the high-temperature water decreases and flows out of the water tank through the H-type lower water distributor 8 and the lower water distributor return pipe 5. When the energy storage water tank releases heat, the low-temperature water passes through the H-type lower water distributor. 8. The return pipe 5 of the lower water distributor flows into the insulation box 1. In the process of low-temperature water gradually filling the insulation box 1, the low-temperature water exchanges heat with the phase-change heat storage material inside the phase-change heat storage ball 10. The phase-change heat storage material inside the phase-change heat storage ball 10 gradually solidifies from the outside to the inside due to the release of heat. In this process, the outer surface of the phase-change heat storage ball 10 shrinks and the corrugated folds 12 on the outer surface gradually recover. After the heat exchange, the temperature of the low-temperature water rises and flows out of the water tank through the H-type upper water distributor 7 and the upper water distributor water supply pipe 2. In the process of heat exchange in the energy storage water tank, the upper water distributor water supply pipe 2, the lower water distributor return pipe 5, the H-type upper water distributor 7, the H-type lower water distributor 8 and the water distribution grid 9 are installed inside the insulation box 1 to make the water evenly distributed in all corners of the box, greatly reducing the dead corner area of ​​the box, ensuring that the phase-change heat storage balls 10 in the box can fully contact with the water, and enhancing the heat exchange effect.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An assembled pleated phase-change heat storage ball energy storage water tank, comprising a heat-insulating box (1), an H-shaped water distributor, and a water distribution grid (9), characterized in that: The heat-insulating box (1) is a stainless steel box, and the outer wall is wrapped with heat-insulating material. The H-type water distributor comprises an upper water distributor water supply pipe (2), an H-type upper water distributor (7), a lower water distributor return pipe (5), and an H-type lower water distributor (8). The H-type upper water distributor (7) is fixed to the upper water distributor water supply pipe (2) and is arranged on the upper part of the insulation box (1). The H-type lower water distributor (8) is fixed to the lower water distributor return pipe (5) and is arranged on the lower part of the insulation box (1). The upper water distributor water supply pipe (2) and the lower water distributor return pipe (5) each have an input end and four output ends. The output ends of the upper water distributor water supply pipe (2) and the lower water distributor return pipe (5) are both located inside the insulation box (1). The input end of the upper water distributor water supply pipe (2) penetrates the insulation box (1) and extends to the insulation box. The heat preservation box (1) is provided with a heat preservation box (1). The input end of the return pipe (5) of the lower water distributor penetrates the heat preservation box (1) and extends to the outside of the heat preservation box (1). The H-type upper water distributor (7) is four and serves as the four output ends of the upper water distributor water supply pipe (2). The H-type upper water distributor (7) is horizontally connected to the upper water distributor water supply pipe (2). The H-type lower water distributor (8) is four and serves as the four output ends of the lower water distributor return pipe (5). The H-type lower water distributor (8) is horizontally connected to the lower water distributor return pipe (5). The upper water distributor water supply pipe (2), the H-type upper water distributor (7), the lower water distributor return pipe (5), and the H-type lower water distributor (8) are fixed to the top and bottom of the heat preservation box (1) respectively through a hanger and a support. The water distribution grid (9) is arranged on the upper part of the heat preservation box (1), and the water distribution grid (9) is located below the water supply pipe (2) of the upper water distributor and the H-type upper water distributor (7). The water distribution grid (9) is detachably connected to the four walls of the heat preservation box (1) by screws. A plurality of phase change heat storage balls (10) are provided between the water distribution grid (9) and the return pipe (5) of the lower water distributor and the H-type lower water distributor (8); The outer surface of the phase-change heat storage ball (10) is provided with corrugated folds (12) and two sinking grooves (11), the two sinking grooves (11) are symmetrically positioned, and the corrugated folds (12) are evenly arranged on the outer surface of the phase-change heat storage ball (10); A plurality of phase-change heat storage balls (10) are tightly stacked, and adjacent phase-change heat storage balls (10) are mutually restricted by sinking grooves (11).

2. The assembled pleated phase change thermal storage ball energy storage water tank according to claim 1, characterized in that: The water distribution grid (9) is a vinyl plate, and a surface of the water distribution grid (9) is provided with a plurality of square holes distributed in a rectangular array.

3. The assembled pleated phase change thermal storage ball energy storage water tank according to claim 1, characterized in that: A sewage outlet (6) is fixedly connected to the rear side of the bottom end of the thermal insulation box (1), and a water supply port (3) and an overflow port (4) are fixedly connected to the front side of the top end of the thermal insulation box (1).

4. The assembled pleated phase change thermal storage ball energy storage water tank according to claim 1, characterized in that: The material of the phase-change heat storage ball (10) is high-density polyethylene, the wall thickness of the phase-change heat storage ball (10) is 1 mm, and a 20°C-60°C phase-change heat storage material is encapsulated inside.

5. The assembled pleated phase change thermal storage ball energy storage water tank according to claim 1, characterized in that: Two symmetrically distributed limiting assemblies (13) are installed inside the thermal insulation box (1), and the limiting assemblies (13) are located between the phase-change heat storage balls (10) at the front and rear sides and the thermal insulation box (1). The limiting assemblies (13) are connected to the phase-change heat storage balls (10) via a sinking groove (11).

6. The assembled pleated phase change thermal storage ball energy storage water tank according to claim 5, characterized in that: The limiting assembly (13) includes two vertically symmetrical supporting cross bars (131), a plurality of elastic limiting longitudinal bars (133) distributed at equal intervals are fixed between the two supporting cross bars (131), and adsorption magnets (132) are fixed at both ends of the supporting cross bars (131). The supporting cross bars (131) are adsorbed on the inner side of the heat preservation box (1) through the adsorption magnets (132), and the elastic limiting longitudinal bars (133) are clamped on the inner side of the sinking groove (11) on the outer surface of the phase change heat storage ball (10).

7. The assembled pleated phase change thermal storage ball energy storage water tank according to claim 6, characterized in that: The elastic limiting longitudinal rod (133) comprises a telescopic protective jacket (1331), the two end portions of the telescopic protective jacket (1331) are respectively fixed to the two supporting cross bars (131), the telescopic protective jacket (1331) is made of rubber, and a plurality of linearly arranged reset assisting magnets (1332) are provided inside the telescopic protective jacket (1331).

8. The assembled pleated phase-change thermal storage ball energy storage water tank according to claim 7, characterized in that: A telescopic cavity (1333) is provided between the resetting aid magnets (1332), and the diameter of the telescopic cavity (1333) is four-fifths of the diameter of the telescopic protective jacket (1331).

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