A gel slab cold storage device

Abstract

The application belongs to the technical field of refrigeration and air conditioning, and relates to a gel plate cold storage device. The device comprises a gel plate cold storage device, characterized by comprising a cold storage tank, a flexible gel ice plate, a cold carrier circulating system and a refrigeration host; the cold storage tank is internally filled with a cold carrier and is provided with at least one suspension crossbar, and the suspension crossbar is hung with at least one flexible gel ice plate; the cold carrier circulating system is connected with the cold storage tank and the refrigeration host respectively, and is used for flowing the cold carrier between the cold storage tank and the refrigeration host, so that the cold carrier contacts the flexible gel ice plate to exchange heat. Based on the above-mentioned device, the high-efficiency heat exchange characteristics and the no-leakage advantage of the flexible gel ice plate are utilized, the optimized cold storage tank structure and the cold carrier circulating system are combined, and the high-efficiency, reliable and easy-to-maintain cold storage function is realized.

Description

Technical Field

[0001] This application relates to the field of refrigeration and air conditioning technology, and in particular to a gel plate cold storage device. Background Technology

[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. It should not be construed as an admission that the description herein is prior art.

[0003] Driven by the demand for peak shaving and valley filling in the power system and energy conservation and consumption reduction in air conditioning, ice storage technology, as a mature energy management method, effectively reduces the operating cost of air conditioning systems and alleviates the load pressure on the power grid by making ice and storing it during the off-peak hours at night and melting and releasing it during the peak hours of the day.

[0004] Existing ice plate cold storage devices typically use rigid encapsulated shells made of high-density polyethylene or other plastic materials, filled with water or phase change materials, and these ice plates are placed in an ice storage tank for heat exchange via a circulating ethylene glycol solution. However, these devices have significant shortcomings in practical applications: firstly, the low thermal conductivity of the plastic shell creates significant thermal resistance at the wall surface, limiting the heat exchange efficiency of the cold storage and release processes; secondly, under long-term freeze-thaw cycles and temperature stress, the plastic shell is prone to aging fatigue and even cracking. Once the shell breaks, the internal medium leaks into the circulation loop, which may not only contaminate the refrigerant and alter the properties of the system's working fluid, but also affect operational stability and even pose environmental risks.

[0005] In summary, existing ice plate cold storage devices use rigid plastic encapsulation shells, which not only result in high thermal resistance and low heat exchange efficiency, but also cause the shell to age and break under long-term freeze-thaw cycles, leading to medium leakage, contamination of the refrigerant, and affecting the stability of system operation. Summary of the Invention

[0006] The gel plate cold storage device provided in this invention at least solves the problems of high thermal resistance, low heat exchange efficiency, and easy aging and damage of the outer shell under long-term freeze-thaw cycles, which can lead to medium leakage, contamination of the refrigerant, and affect the stability of system operation.

[0007] According to a first aspect of the present invention, a gel plate cold storage device is provided, comprising: a cold storage tank, a flexible gel ice plate, a refrigerant circulation system, and a refrigeration unit; The cold storage tank is filled with a refrigerant and is equipped with at least one suspension crossbar, on which at least one of the flexible gel ice plates is hung. A refrigerant circulation system is provided, which is connected to the cold storage tank and the refrigeration unit respectively, to allow the refrigerant to flow between the cold storage tank and the refrigeration unit, so that the refrigerant can come into contact with the flexible gel ice plate for heat exchange.

[0008] According to an embodiment of the present invention, the flexible gel ice plate is composed of a plurality of interconnected flexible packaging bags, the flexible packaging bags being configured as cylindrical or flat; the flexible packaging bags contain gel ice and snow material that maintains a solid state throughout the phase change process.

[0009] According to an embodiment of the present invention, the flexible packaging bag is composed of a multilayer composite film, the multilayer composite film including an inner heat-sealing layer, an intermediate reinforcing layer and an outer protective layer.

[0010] According to an embodiment of the present invention, the suspension crossbar is provided with a first crossbar body, a first connecting part is provided below the first crossbar body, a fixing through hole is provided through the first connecting part, and a through groove is provided below the fixing through hole; the flexible gel ice plate is fixed in the fixing through hole by the uppermost flexible packaging bag.

[0011] According to an embodiment of the present invention, the suspension crossbar is provided with a second crossbar body, a second connecting part is provided below the second crossbar body, and the second connecting part is provided with a fixed crossbar and a fixed plate; A plurality of fixing posts are arranged in sequence on one side of the fixed crossbar, and a first fixing hole adapted to the plurality of fixing posts is provided on the fixing plate; The upper end of the flexible gel ice plate is provided with a third connecting part, and the third connecting part is provided with a second fixing hole adapted to the plurality of fixing posts; the flexible gel ice plate is fixed to the fixing post of the fixing crossbar through the second fixing hole.

[0012] According to an embodiment of the present invention, a crossbar support device is fixed inside the cold storage tank, the crossbar support device is provided with a receiving groove adapted to the suspension crossbar, and a suspension reinforcing rib is provided below the receiving groove; the receiving groove and the suspension reinforcing rib are configured as an integral structure; the suspension crossbar is placed inside the receiving groove.

[0013] According to an embodiment of the present invention, the cold storage tank includes an inner liner layer, an insulation layer, and an outer shell layer arranged sequentially from the inside to the outside.

[0014] According to an embodiment of the present invention, a refrigerant outlet and a refrigerant inlet are respectively provided on both sides of the cold storage tank; the refrigerant circulation system includes: a circulation pump, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a first valve, and a second valve; The circulating pump drives the flow of the refrigerant; The first pipeline connects the outlet of the refrigeration unit to the refrigerant inlet of the cold storage tank; The second pipeline connects the refrigerant outlet of the cold storage tank to the inlet of the refrigeration unit; The third pipeline connects the refrigerant outlet of the cold storage tank to the user-end cooling load. The fourth pipeline is connected to the refrigerant inlet of the cold storage tank, which is the return flow of the user's cold load. The first valve is installed in either the first pipe or the second pipe; The second valve is installed in either the third or the fourth pipeline.

[0015] According to an embodiment of the present invention, a temperature monitoring system is further included, the temperature monitoring system including at least one temperature sensor disposed inside the cold storage tank and / or on the surface of the flexible gel ice plate, for real-time monitoring of the temperature of the refrigerant and the temperature of the flexible gel ice plate.

[0016] According to an embodiment of the present invention, a controller is further included, the controller being electrically connected to the temperature sensor, the refrigeration unit, the circulating pump, the first valve, and the second valve; the controller is configured to: When the temperature of the flexible gel ice plate is higher than the first set value, the first valve is opened, the second valve is closed, and the refrigeration unit is started to store cold until the temperature of the flexible gel ice plate drops to the second set value and then stops. When the user has a cooling load requirement and the temperature of the flexible gel ice plate is lower than the third set value, the second valve is opened, the first valve is closed, and the circulation pump is started to release cold until the temperature of the flexible gel ice plate rises to the fourth set value and then stops.

[0017] Beneficial effects of the embodiments of the present invention: This invention provides a gel plate cold storage device that organically combines a cold storage tank, flexible gel ice plates, a refrigerant circulation system, and a refrigeration unit to construct a highly efficient and reliable cold storage system. The flexible gel ice plates are suspended on horizontal bars within the cold storage tank, enabling convenient installation and flexible layout. The refrigerant circulation system drives the refrigerant to flow between the cold storage tank and the refrigeration unit, allowing the refrigerant to directly contact and fully exchange heat with the suspended flexible gel ice plates. This eliminates the need for intermediate heat exchange components such as coils, significantly reducing thermal resistance and improving energy transfer efficiency during cold storage and release. Furthermore, the structural characteristics of the flexible gel ice plates ensure they remain in a solid state during phase change, completely eliminating the refrigerant contamination and system operation risks caused by shell damage in traditional ice plates, thus enhancing the long-term operational stability of the device. In addition, the device can utilize the peak-valley electricity price difference of the power grid, and store cold during the nighttime off-peak electricity price period and release cold during the daytime peak electricity price period through the refrigeration unit, which effectively reduces the operating costs of application scenarios such as cold storage, realizes the power grid regulation function of peak shifting and valley filling, and has both economic and environmental benefits.

[0018] Details of one or more embodiments of the present invention are set forth in the following drawings and description, so that other features, objects and advantages of the invention will be more readily understood. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a gel plate cold storage device provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of a cold storage tank provided in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of a suspension crossbar provided in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of a flexible gel ice plate provided in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of another suspension crossbar provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of another suspension crossbar provided in an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of a crossbar support device provided in an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of a refrigerant circulation system provided in an embodiment of the present invention.

[0028] In the diagram: 1. Cold storage tank; 2. Refrigerant circulation system; 3. Refrigeration unit; 4. User-end cooling load; 5. Suspension crossbar; 6. Flexible gel ice plate; 7. Inner heat-sealing layer; 8. Intermediate reinforcing layer; 9. Outer protective layer; 10. Gel ice and snow material; 11. First crossbar body; 12. First connecting part; 13. Fixing through hole; 14. Through groove; 15. Second crossbar body; 16. Second connecting part; 17. Fixed crossbar; 18. Fixing plate; 19. Fixing column; 20. Third connecting part; 21. Crossbar support device; 22. Receiving groove; 23. Suspension reinforcing rib. Detailed Implementation

[0029] Embodiments of this embodiment will now be described in more detail with reference to the accompanying drawings. While some embodiments of this embodiment are shown in the drawings, it should be understood that this embodiment can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this embodiment. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this embodiment.

[0030] Driven by the demand for peak-shaving and valley-filling electricity and energy-saving air conditioning, ice storage technology reduces air conditioning operating costs and alleviates grid pressure by making ice and storing it at night and releasing it during the day. Existing ice plate cold storage devices mostly use rigid plastic shells, which have two major problems: first, the shell has a low thermal conductivity, limiting heat exchange efficiency; second, long-term freeze-thaw cycles can easily lead to aging and cracking, resulting in medium leakage, contamination of the refrigerant, and affecting system stability.

[0031] To address the aforementioned problems, embodiments of the present invention provide a gel plate cold storage device. Figure 1 This is a schematic diagram of a gel plate cold storage device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of a cold storage tank provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of a suspension crossbar provided in an embodiment of the present invention.

[0032] like Figures 1 to 3 As shown, the gel plate cold storage device of this invention includes: a cold storage tank 1, a flexible gel ice plate 6, a refrigerant circulation system 2, and a refrigeration unit 3.

[0033] The cold storage tank 1 is filled with a refrigerant and is equipped with at least one suspension crossbar 5, on which at least one flexible gel ice plate 6 is hung. The refrigerant circulation system 2 is connected to both the cold storage tank 1 and the refrigeration unit 3, and is used to allow the refrigerant to flow between the cold storage tank 1 and the refrigeration unit 3, so that the refrigerant can come into contact with the flexible gel ice plate 6 for heat exchange.

[0034] The cold storage tank 1 is a container for storing cold energy, used to hold a refrigerant and flexible gel ice plates 6. In this embodiment, the cold storage tank 1 is filled with a refrigerant, such as an aqueous solution of ethylene glycol. The shape of the cold storage tank 1 can be designed as a cuboid or cube according to actual needs, and its size can be customized according to the area of ​​the user-end cold load 4 (such as the heat exchanger of a cold storage) or the cold storage capacity.

[0035] The cold storage tank 1 is equipped with at least one suspension crossbar 5. The suspension crossbar 5 is used to hang flexible gel ice plates 6, and its arrangement can be flexibly designed according to the tank size and the number of ice plates. For example, multiple crossbars can be arranged along the height direction in the cold storage tank 1, and multiple crossbars can be arranged in parallel in each layer. The two ends of the crossbar are preferably supported on the support device fixed to the inner wall of the cold storage tank 1, such as the suspension reinforcing rib 23 support or bracket.

[0036] At least one flexible gel ice plate 6 is hung on the suspension crossbar 5. The upper end of the flexible gel ice plate 6 is connected to the crossbar, and the lower end hangs freely in the refrigerant. The hanging method can be direct hanging, connection through hooks, or connection through fixing holes. In some embodiments, a connecting structure, such as a fixing through hole or fixing post, is provided below the crossbar to cooperate with the corresponding structure on the flexible gel ice plate 6 to achieve quick hanging. Because the flexible gel ice plate 6 has a certain degree of flexibility, it can sway slightly with the flow of the refrigerant after hanging, thereby enhancing the contact heat exchange with the refrigerant.

[0037] The flexible gel ice plate 6 is the core component for storing cold energy. It consists of multiple interconnected flexible packaging bags, each containing gel ice material 10. The gel ice material 10 is a phase change material that maintains a solid state throughout the phase change process. It does not produce liquid water leakage during freezing and thawing, fundamentally solving the leakage problem caused by the cracking of the outer shell of traditional ice plates.

[0038] In addition, the length of the flexible gel ice plate 6 can be designed according to the height of the cold storage tank 1, for example, the same as the height of the tank or twice the height of the tank, so that it can be fully immersed in the coolant and form a curved flow channel, thereby extending the contact time between the coolant and the ice plate.

[0039] The refrigerant circulation system 2 is used to drive the refrigerant to circulate between the refrigeration unit 3 and the cold storage tank 1, or between the cold storage tank 1 and the user-end cooling load 4, to achieve the transfer of cooling capacity. This system mainly includes a circulation pump, connecting pipes, and valves.

[0040] Specifically, the refrigerant circulation system 2 is connected to the cold storage tank 1 and the refrigeration unit 3, forming a closed loop. During cold storage, the refrigerant flows from the refrigeration unit 3 under the drive of the circulation pump, enters the cold storage tank 1 through pipelines, and comes into full contact with the flexible gel ice plate 6, transferring cold energy to the flexible gel ice plate 6, causing the gel material to freeze and store cold. Then, the refrigerant temperature rises and flows back to the refrigeration unit 3 for further cooling. During cold release, the refrigerant flows out of the cold storage tank 1, is transported to the user-end cooling load 4 through pipelines, releases cold energy, rises in temperature, and then flows back to the cold storage tank 1 to contact the ice plate again for cooling, thus completing the cycle.

[0041] To enable switching between cold storage and cold release modes, valve assemblies can be installed on the pipeline. For example, a first valve can be installed on the pipeline between the refrigeration unit 3 and the cold storage tank 1, and a second valve can be installed on the pipeline between the cold storage tank 1 and the user-end cooling load 4. By controlling the opening and closing of the valves, the device can switch between cold storage mode, cold release mode, and direct cooling mode.

[0042] The refrigeration unit 3 is the device that generates cooling capacity. It is typically a compression refrigeration unit and can operate during off-peak electricity hours at night in practical applications. Its outlet temperature can be set according to the cold storage requirements. For example, when the target cold storage temperature for the gel ice plate is -2℃, the outlet temperature of the refrigeration unit 3 can be set to no higher than -5℃ to ensure sufficient heat exchange temperature difference. The refrigeration unit 3 is connected to the cold storage tank 1 through the refrigerant circulation system 2 to transfer the cooling capacity to the refrigerant.

[0043] In practical applications, during periods of low electricity prices (cold storage mode), the refrigeration unit 3 starts up, and the refrigerant circulation system 2 drives the low-temperature refrigerant into the cold storage tank 1. As the refrigerant flows within the tank, it comes into contact with the flexible gel ice plate 6. The gel material inside the ice plate absorbs the cold and gradually freezes, storing a large amount of latent heat. When the ice plate temperature drops to a set value (e.g., -2℃), cold storage is complete, and the refrigeration unit 3 and the circulation pump stop.

[0044] During peak electricity price periods (cooling release mode), when users (such as cold storage facilities) require cooling, the refrigerant circulation system 2 drives the refrigerant in the cold storage tank 1 to flow into the user's heat exchanger. After absorbing heat and rising in temperature, the refrigerant returns to the cold storage tank 1 to contact the ice plate and cool down. This cycle continues, gradually releasing the cooling capacity stored in the ice plate. Cooling release ends when the ice plate temperature rises above 0°C.

[0045] If the user-end cooling load 4 requires continuous cooling but the ice plate's cooling capacity is insufficient, it can be switched to direct cooling mode, where the refrigeration unit 3 directly supplies cooling to the user end.

[0046] Through the above structure and working method, the gel plate cold storage device of this embodiment of the invention utilizes the high-efficiency heat exchange characteristics and leak-free advantage of the flexible gel ice plate 6, combined with the optimized cold storage tank 1 structure and the refrigerant circulation system 2, to achieve a high-efficiency, reliable and easy-to-maintain cold storage function.

[0047] Figure 4 This is a schematic diagram of the structure of a flexible gel ice plate provided in an embodiment of the present invention.

[0048] like Figure 4 As shown, the flexible gel ice plate 6 is composed of multiple interconnected flexible packaging bags. The flexible packaging bags can be cylindrical, flat, or other shapes that facilitate heat exchange. Multiple packaging bags are connected in sequence to form a plate-like structure. Adjacent bags are connected by heat sealing or bonding to form a joint, so that the whole structure forms a plate-like structure similar to a "gel rod array". For example, multiple cylindrical bags are connected in an array, resembling a plate composed of "gel rods".

[0049] In one alternative embodiment, the packaging bag is composed of a multilayer composite film, which includes an inner heat-sealing layer 7, a middle reinforcing layer 8, and an outer protective layer 9. This multilayer structure design balances heat-sealing performance, mechanical strength, and environmental resistance.

[0050] The material for the multilayer composite film can be a multilayer composite film with good flexibility and low-temperature resistance, such as a co-extruded film of linear low-density polyethylene (LLDPE) and nylon (PA), with a thickness of 40-50 micrometers. This film has good thermal conductivity and can withstand repeated freeze-thaw cycles without easily breaking. Due to the extremely thin film and the small unit size of the packaging bag, the specific surface area of ​​the flexible gel ice plate 6 is much larger than that of traditional block ice plates, thus significantly improving the heat exchange efficiency with the refrigerant.

[0051] Specifically, the inner heat-sealing layer 7 is the innermost layer of the film and is in direct contact with the gel ice and snow material 10. This layer can be heat-sealed during the bag-making process to form a seal, and at the same time, it has a certain degree of flexibility to adapt to the volume changes of the gel material. The inner heat-sealing layer 7 is preferably made of linear low-density polyethylene (LLDPE). LLDPE has good heat-sealing performance and flexibility, low heat-sealing temperature, high heat-sealing strength, and can still maintain good flexibility at low temperatures, making it less prone to brittleness.

[0052] The intermediate reinforcing layer 8 is the skeleton layer of the film, mainly providing mechanical strength and puncture resistance. During repeated freeze-thaw cycles, the packaging bag may be subjected to stress caused by changes in the internal gel volume, as well as the impact of external refrigerant flow. The intermediate reinforcing layer 8 effectively prevents the film from breaking. The intermediate reinforcing layer 8 is preferably made of nylon (PA). It has high mechanical strength, excellent tensile and tear strength, and good puncture resistance, resisting punctures from sharp objects.

[0053] The outer protective layer 9 is the outermost layer of the film, which is in direct contact with the refrigerant (such as an aqueous solution of ethylene glycol). This layer needs to be resistant to corrosion by the refrigerant, not react with ethylene glycol, and be wear-resistant to prevent damage caused by friction with other bags or tank walls.

[0054] The outer protective layer 9 is preferably made of linear low-density polyethylene or metallocene polyethylene. These materials have good chemical resistance, low surface friction coefficient, and are the same as or similar to the inner layer material, facilitating co-extrusion processing. In some embodiments, the outer layer may also be made of reinforced polyethylene or have added UV stabilizers to improve weather resistance.

[0055] As mentioned above, multilayer composite films are preferably prepared using co-extrusion blow molding or co-extrusion casting processes. Co-extrusion allows different materials to be extruded simultaneously and laminated in a molten state, resulting in strong interlayer bonding. This eliminates the need for adhesives, avoiding the problems of adhesive embrittlement or leaching at low temperatures. For bag making, a heat-sealing process can be used to seal three or four sides of the two films to form a sealed bag, leaving an opening for filling with gel material. After filling, the bag is then heat-sealed.

[0056] Figure 5 This is a schematic diagram of another suspension crossbar provided in an embodiment of the present invention.

[0057] like Figure 5 As shown, this embodiment provides a specific connection method between the flexible gel ice plate 6 and the suspension crossbar 5. This structure is simple, reliable, and easy to install and replace. Specifically, the suspension crossbar 5 is provided with a first crossbar body 11, and a first connecting part 12 is provided below the first crossbar body 11. A fixing through hole 13 is provided through the first connecting part 12, and a through groove 14 is provided below the fixing through hole 13. The flexible gel ice plate 6 is fixed in the fixing through hole 13 by the uppermost flexible packaging bag.

[0058] In this embodiment, the suspension crossbar 5 is provided with a first crossbar body 11. The first crossbar body 11 is the main part of the suspension crossbar 5 and can be made of corrosion-resistant stainless steel, possessing sufficient mechanical strength to support the weight of multiple flexible gel ice plates 6. Its cross-sectional shape can be circular, square, or rectangular, and can be specifically designed according to the size and stress requirements of the cold storage tank 1. The two ends of the first crossbar body 11 are mounted on the support structure on the inner wall of the cold storage tank 1 for detachable installation.

[0059] A first connecting portion 12 is provided below the first crossbar body 11. The first connecting portion 12 is a part for direct connection with the flexible gel ice plate 6, and its structure can be designed according to the hanging requirements. In this embodiment, the first connecting portion 12 is preferably a plate-shaped or block-shaped structure integrally formed or fixedly connected with the first crossbar body 11, and is arranged along the length direction of the first crossbar body 11.

[0060] A fixing through hole 13 is provided through the first connecting part 12. The fixing through hole 13 is a hole through which the uppermost packaging bag of the flexible gel ice plate 6 passes, and its shape and size are adapted to the cross-sectional shape of the flexible packaging bag. For example, when the flexible packaging bag is cylindrical, the fixing through hole 13 can be designed as a circular hole; when the packaging bag is flat, the fixing through hole 13 can be designed as an oblong hole or a rectangular hole. The diameter or width of the fixing through hole 13 can be slightly larger than the cross-sectional size of the packaging bag to facilitate the smooth passage of the packaging bag, but it should not be too large to avoid excessive shaking or falling off after hanging. The fixing through hole 13 is usually opened through the thickness direction of the first connecting part 12, that is, through from the front side to the rear side (or through from the upper side to the lower side) of the first connecting part 12, and the specific direction depends on the hanging method.

[0061] Below the fixing through hole 13, a through groove 14 is provided on the first connecting part 12. The through groove 14 extends upward from the lower edge of the first connecting part 12 to the opening of the fixing through hole 13. The width of the through groove 14 is smaller than the diameter or width of the fixing through hole 13, but is sufficient to accommodate the connecting neck of the flexible packaging bag. The function of the through groove 14 is to allow the uppermost packaging bag of the flexible gel ice plate 6 to be directly inserted into the fixing through hole 13 from below without disassembling the crossbar, thereby achieving quick mounting and dismounting. Specifically, during installation, the uppermost packaging bag of the flexible gel ice plate 6 can be aligned with the through groove 14 and pushed in along the thickness direction of the first connecting part 12, so that the connecting neck of the packaging bag slides into the through groove 14 until the main body of the packaging bag enters the fixing through hole 13. Since the size of the main body of the packaging bag is larger than the width of the through groove 14, the packaging bag is reliably confined within the fixing through hole 13 and will not fall out. During dismounting, simply pull the packaging bag down so that it slides out from the fixing through hole 13 through the through groove 14.

[0062] The flexible gel ice plate 6 is fixed within the fixing through hole 13 by its uppermost flexible encapsulation bag. The flexible gel ice plate 6 is composed of multiple interconnected flexible encapsulation bags, with the uppermost flexible encapsulation bag serving as the hanging point. The uppermost flexible encapsulation bag can be a single encapsulation bag or the first encapsulation bag connected to other encapsulation bags. In the hanging state, the main body of the uppermost flexible encapsulation bag is contained within the fixing through hole 13, while the other encapsulation bags below it hang naturally below the first connecting part 12, immersed in the refrigerant in the cold storage tank 1. Because the diameter or width of the uppermost encapsulation bag is greater than the width of the through groove 14, the ice plate will not slip out of the fixing through hole 13 even when impacted by the flow of refrigerant, ensuring a secure and reliable hanging.

[0063] Through the above structure, this embodiment achieves a quick and reliable connection between the flexible gel ice plate 6 and the suspension crossbar 5. No tools are required during installation; simply align the top sealing bag of the ice plate with the through groove 14 and push it in. Replacement is also as simple as pulling it out, making the operation extremely convenient. Simultaneously, due to the structural design of the fixing through holes 13 and through grooves 14, the hanging position of each ice plate is relatively fixed, preventing the ice plates from tangling or excessively swaying in the flowing coolant, thus ensuring the stability of the heat exchange process.

[0064] It should be noted that the specific dimensions, quantity, and distribution spacing of the first crossbar body 11, the first connecting part 12, and the fixing through holes 13 and through grooves 14 on them in this embodiment can be optimized according to the actual size of the cold storage tank 1, the flow characteristics of the refrigerant, and the specifications of the flexible gel ice plate 6. These adjustments are all within the protection scope of this invention.

[0065] Figure 6 This is a schematic diagram of another suspension crossbar provided in an embodiment of the present invention.

[0066] like Figure 6 As shown, this embodiment provides another specific connection method between the flexible gel ice plate 6 and the suspension crossbar 5. This structure adopts a plug-in fixing method, which makes the connection more stable and is particularly suitable for application scenarios with high refrigerant flow rates or large ice plate sizes.

[0067] The suspension crossbar 5 is provided with a second crossbar body 15, and a second connecting part 16 is provided below the second crossbar body 15. The second connecting part 16 is provided with a fixed crossbar 17 and a fixing plate 18. A plurality of fixing posts 19 are arranged in sequence on one side of the fixed crossbar 17. The fixing plate 18 is provided with a first fixing hole that matches the plurality of fixing posts 19. The upper end of the flexible gel ice plate 6 is provided with a third connecting part 20. The third connecting part 20 is provided with a second fixing hole that matches the plurality of fixing posts 19. The flexible gel ice plate 6 is fixed to the fixing posts 19 of the fixed crossbar 17 through the second fixing hole.

[0068] In this embodiment, the suspension crossbar 5 is provided with a second crossbar body 15. The second crossbar body 15 is the main load-bearing part of the suspension crossbar 5. Similar to the first crossbar body 11 in the above embodiment, it can be made of corrosion-resistant materials such as stainless steel and has sufficient strength and rigidity. The two ends of the second crossbar body 15 are also mounted on the support structure of the inner wall of the cold storage tank 1.

[0069] A second connecting portion 16 is provided below the second crossbar body 15. The second connecting portion 16 is an intermediate structure for connecting the flexible gel ice plate 6 and is fixedly connected to the second crossbar body 15. The fixing method can be welding, bolting, or integral molding, etc. The second connecting portion 16 is provided along the length direction of the second crossbar body 15.

[0070] Specifically, the second connecting part 16 is provided with a fixing crossbar 17 and a fixing plate 18. The fixing crossbar 17 and the fixing plate 18 together form a clamping and fixing structure.

[0071] The fixing crossbar 17 has a rod-like structure, and its axis is preferably parallel to the axis of the second crossbar body 15. A plurality of fixing posts 19 are arranged sequentially on one side of the fixing crossbar 17 (e.g., the side facing the fixing plate 18). These fixing posts 19 are protruding structures for insertion and fixing to the flexible gel ice plate 6. The fixing posts 19 can be cylindrical, square, or other shapes, and their diameter or cross-sectional dimensions should be designed according to the stress requirements. The fixing posts 19 are arranged at equal intervals or as needed along the length of the fixing crossbar 17, and the spacing between adjacent fixing posts 19 matches the hole spacing of the third connecting portion 20 at the upper end of the flexible gel ice plate 6. The length of the fixing posts 19 should be sufficient to pass through the fixing plate 18 and the third connecting portion 20 of the flexible gel ice plate 6, with a certain margin to ensure reliable fixing.

[0072] The fixing plate 18 and the fixing crossbar 17 are arranged opposite to each other, forming a gap between them to accommodate the upper end of the flexible gel ice plate 6. The fixing plate 18 has first fixing holes adapted to a plurality of fixing posts 19. The position, number, and diameter of the first fixing holes correspond one-to-one with the fixing posts 19 on the fixing crossbar 17. When the fixing plate 18 and the fixing crossbar 17 are assembled, the ends of the fixing posts 19 can pass through the first fixing holes, thereby positioning the fixing plate 18 on the fixing crossbar 17. The connection between the fixing plate 18 and the fixing crossbar 17 can be detachable. In a preferred embodiment, the fixing plate 18 and the fixing crossbar 17 are fixedly connected to form an integral second connecting part 16 to simplify the installation steps.

[0073] The upper end of the flexible gel ice plate 6 is provided with a third connecting part 20. The third connecting part 20 is a dedicated structural part on the flexible gel ice plate 6 that connects to the suspension crossbar 5. The third connecting part 20 has second fixing holes adapted to multiple fixing posts 19. The position, number, and diameter of the second fixing holes correspond one-to-one with the fixing posts 19 on the fixing crossbar 17. The third connecting part 20 can be a connecting ear formed by special treatment of the uppermost packaging bag of the flexible gel ice plate 6, or it can be a connecting sheet additionally fixed to the uppermost packaging bag. The third connecting part 20 is preferably made of a flexible material with a certain strength so as to reliably suspend the weight of the ice plate, while also having a certain degree of flexibility for easy operation during installation.

[0074] The flexible gel ice plate 6 is fixed to the fixing post 19 of the fixing crossbar 17 through the second fixing hole. During assembly, firstly, align the second fixing hole on the third connecting part 20 of the flexible gel ice plate 6 with the fixing post 19 on the fixing crossbar 17, and push the ice plate in so that the fixing post 19 passes through the second fixing hole. At this time, the third connecting part 20 is fitted onto the fixing post 19. Then, cover the outside of the third connecting part 20 with the fixing plate 18, so that the end of the fixing post 19 simultaneously passes through the first fixing hole on the fixing plate 18. Since the length of the fixing post 19 is sufficient to pass through both the third connecting part 20 and the fixing plate 18 simultaneously, the third connecting part 20 is clamped between the fixing crossbar 17 and the fixing plate 18, and radial positioning and circumferential limiting are achieved through the fixing post 19. Thus, the flexible gel ice plate 6 is securely suspended on the suspension crossbar 5.

[0075] In a preferred embodiment, the end of the fixing post 19 may also be provided with an anti-detachment structure, such as a threaded connection that engages with a nut for locking, or an elastic buckle, to prevent the flexible gel ice plate 6 from falling off the fixing post 19 during use.

[0076] Through the above structure, this embodiment achieves multi-point insertion and fixation between the flexible gel ice plate 6 and the suspension crossbar 5. Compared with the through-groove 14 mounting method of the above embodiment, the connection in this embodiment is more stable and reliable. Each ice plate is simultaneously fixed by multiple fixing posts 19, which can withstand greater refrigerant impact force and prevent the ice plate from shaking or falling off during flow. At the same time, the array layout of multiple fixing posts 19 ensures precise fixation of the ice plate's suspension position, which is conducive to forming a regular ice plate array, optimizing the refrigerant flow path, and improving heat exchange efficiency.

[0077] This embodiment also offers ease of installation and replacement. During installation, simply align the third connecting part 20 of the ice plate with the fixing post 19 and insert it, then cover it with the fixing plate 18. For replacement, remove the fixing plate 18 and pull the ice plate off the fixing post 19; the operation is simple and quick. Since multiple fixing posts 19 are provided along the length of the fixing crossbar 17, the number of ice plates can be flexibly adjusted according to actual needs, achieving a modular configuration of the cold storage capacity.

[0078] It should be noted that the number, spacing, and specific dimensions of the fixing posts 19, the first fixing hole, and the second fixing hole in this embodiment can all be optimized according to the specifications of the flexible gel ice plate 6 and the dimensions of the cold storage tank 1. For example, for a wider flexible gel ice plate 6, more fixing posts 19 can be provided to ensure a stable connection; for a smaller ice plate, fewer fixing posts 19 can be provided. These adjustments are all within the scope of protection of this invention.

[0079] Figure 7 This is a schematic diagram of a crossbar support device provided in an embodiment of the present invention.

[0080] like Figure 7 As shown, this embodiment provides a support structure for the suspension crossbar 5 in the cold storage tank 1. The structure is reasonably designed, easy to install, and has good load-bearing capacity and maintainability.

[0081] A crossbar support device 21 is welded inside the cold storage tank 1. The crossbar support device 21 is provided with a receiving groove 22 that is adapted to the suspension crossbar 5. A suspension reinforcing rib 23 is provided below the receiving groove 22. The receiving groove 22 and the suspension reinforcing rib 23 are configured as an integral structure. The suspension crossbar 5 is placed inside the receiving groove 22.

[0082] In this embodiment, a crossbar support device 21 is fixedly installed on the inner wall of the cold storage tank 1. The crossbar support device 21 is a special component for supporting the suspended crossbar 5, and can be made of the same corrosion-resistant material as the inner liner of the cold storage tank 1, such as stainless steel. Welding is the preferred fixing method to ensure the strength of the connection and the reliability of long-term use. The welding positions can be designed according to the size of the cold storage tank 1 and the layout requirements of the suspended crossbar 5, for example, welding in pairs on opposite inner walls of the cold storage tank 1 to support the crossbar.

[0083] The main structure of the crossbar support device 21 is provided with a receiving groove 22 adapted to the suspension crossbar 5. The receiving groove 22 is a recessed structure used to accommodate and position the end of the suspension crossbar 5, and its shape and size should match the end profile of the suspension crossbar 5. For example, when the suspension crossbar 5 is a round tube, the receiving groove 22 can be designed as a semi-circular or U-shaped groove; when the suspension crossbar 5 is a square tube, the receiving groove 22 can be designed as a rectangular groove. The depth of the receiving groove 22 can accommodate a part of the end of the crossbar to prevent it from coming out during use due to vibration or refrigerant flow, but it should not be too deep to facilitate the removal and placement of the crossbar.

[0084] The opening of the receiving groove 22 is preferably upward-opening, so that the suspension crossbar 5 can be placed directly into the receiving groove 22 from top to bottom without complicated installation operations. At the same time, in order to accommodate suspension crossbars 5 of different lengths or dimensional changes caused by thermal expansion and contraction, the receiving groove 22 can be reserved with a certain amount of play in the length direction of the crossbar to avoid jamming.

[0085] Below the receiving trough 22, the crossbar support device 21 is also provided with reinforcing ribs. These reinforcing ribs are ribs or protrusions used to enhance the structural strength of the crossbar support device 21. Because the crossbar support device 21 needs to bear the entire weight of the suspended crossbar 5 and the flexible gel ice plate 6 mounted on it, and may be subject to the impact of the refrigerant flow, its root (i.e., the connection point with the inner wall of the cold storage tank 1) and the bottom of the receiving trough 22 bear significant bending moments and stresses. The reinforcing ribs effectively disperse these stresses, preventing deformation of the support device or cracking of the welds.

[0086] The specific shape and arrangement of the reinforcing ribs can be optimized according to the stress conditions. For example, the reinforcing ribs can be designed as triangular ribs, with one right-angled side connected to the main body of the crossbar support device 21 and the other right-angled side connected to (or suspended from) the inner wall of the cold storage tank 1, forming a stable triangular support structure. The reinforcing ribs can also be designed as multiple longitudinal ribs extending along the height direction of the support device, or as transverse ribs connected to the bottom of the receiving tank 22.

[0087] In this embodiment, the receiving groove 22 and the reinforcing rib are configured as an integral structure. An integral structure means that the receiving groove 22 and the reinforcing rib are formed as a single component using the same manufacturing process (such as stamping, casting, bending, and welding), rather than being manufactured separately and then assembled. The advantages of an integral structure are: firstly, it eliminates potential weak points at the connection points, resulting in higher overall strength and load-bearing capacity; secondly, it reduces the number of parts and assembly steps, lowering manufacturing costs; and finally, it results in a more compact structure, occupying less space and facilitating full utilization of the internal space of the cold storage tank 1.

[0088] Specifically, the crossbar support device 21 can be integrally stamped from a stainless steel plate, forming both the recessed structure of the receiving groove 22 and the protruding structure of the reinforcing rib; alternatively, the reinforcing rib can be directly welded to the pre-formed main body, but preferably, the reinforcing structure is formed by the deformation of the material itself. Regardless of the process used, as long as the receiving groove 22 and the reinforcing rib form an inseparable whole, it can be considered as an integral structure.

[0089] The suspension crossbar 5 is placed in the receiving groove 22. The suspension crossbar 5 is a rod used to hang the flexible gel ice plate 6, and its two ends are respectively supported in the receiving groove 22 of the crossbar support device 21 on both sides of the inner wall of the cold storage tank 1. This placement method allows the suspension crossbar 5 to be stably positioned without relying on any fasteners. During installation, simply align the two ends of the crossbar with the receiving groove 22 and insert it; when it is necessary to replace or adjust the position of the crossbar, simply lift the crossbar upwards and remove it, making the operation simple.

[0090] In practical applications, the crossbar support device 21 can be arranged in multiple layers along the height of the cold storage tank 1, with each layer arranged in pairs on opposite inner walls to support multiple parallel suspended crossbars 5. Operators can hang flexible gel ice plates 6 on some or all of the crossbars according to the cold storage capacity requirements. When it is necessary to increase the cold storage capacity, ice plates can be added to the idle crossbars at any time; when it is necessary to reduce or replace the ice plates, the ice plates can be removed first, and then the crossbars can be taken out of the receiving tank 22 for maintenance or replacement.

[0091] Through the above structure, this embodiment achieves stable support and flexible assembly / disassembly of the suspension crossbar 5 within the cold storage tank 1. The integrated design of the crossbar support device 21 ensures sufficient load-bearing capacity and long-term reliability, while the open structure of the receiving slot 22 allows for tool-free installation and disassembly of the crossbar, greatly facilitating the arrangement and replacement of the flexible gel ice plate 6 and the maintenance of the cold storage tank 1. Simultaneously, due to the reinforcing effect of the reinforcing ribs, the crossbar support device 21 is not prone to fatigue failure even under long-term alternating loads (such as stress generated by volume changes caused by the freeze-thaw cycle of the ice plate), ensuring the operational safety and service life of the entire cold storage device.

[0092] In an optional embodiment, the structure of the cold storage tank 1 can adopt a multi-layer composite wall design, which can provide sufficient mechanical strength while ensuring good thermal insulation performance and extending the service life of the equipment.

[0093] In this embodiment, the cold storage tank 1 includes an inner liner layer, an insulation layer, and an outer shell layer arranged sequentially from the inside out. This three-layer structure is the basic component of the wall of the cold storage tank 1, and the material selection and thickness of each layer can be optimized according to factors such as the volume of the cold storage tank 1, the operating temperature range, and the installation environment.

[0094] The inner liner is the innermost layer of the cold storage tank 1, and it is in direct contact with the refrigerant and the flexible gel ice plate 6. Therefore, the material of the inner liner needs to have good low-temperature resistance, corrosion resistance, and a certain mechanical strength.

[0095] In this preferred embodiment, the inner liner can be made of stainless steel, such as 304 stainless steel or 316L stainless steel. Stainless steel has good toughness and strength in low-temperature environments and will not become brittle due to temperature changes; at the same time, stainless steel has good corrosion resistance to common refrigerants such as ethylene glycol aqueous solutions, and can be used for a long time without rusting or corrosion, ensuring the cleanliness of the refrigerant and the service life of the cold storage tank 1.

[0096] The thickness of the inner liner can be designed according to the volume and load-bearing requirements of the cold storage tank 1. For small to medium-sized cold storage tanks 1 (such as about 1 cubic meter), the thickness of the inner liner can be selected between 1.5 mm and 3 mm, which ensures sufficient structural strength without excessively increasing cost and weight. The inner liner can be formed by welding, and the joints should be well sealed to prevent refrigerant leakage.

[0097] To facilitate the installation of internal components such as the suspension crossbar 5, various support structures, such as reinforcing rib supports and crossbar brackets, can be pre-welded or fixed to the inner wall of the inner liner. These support structures are preferably made of the same material as the inner liner to avoid electrochemical corrosion between different materials. In some embodiments of the present invention, multiple reinforcing rib supports (i.e., crossbar support devices 21) are welded to the inner wall of the inner liner to support both ends of the suspension crossbar 5.

[0098] The insulation layer, located on the outside of the inner tank, is the key layer for achieving the insulation function of the cold storage tank 1. The function of the insulation layer is to minimize the loss of cold energy from the inside of the cold storage tank 1 to the external environment through the walls, thereby improving cold storage efficiency and reducing operating energy consumption.

[0099] The insulation layer material can be selected from those with low thermal conductivity, high closed-cell ratio, and good low-temperature resistance. In this preferred embodiment, rigid polyurethane foam is used for the insulation layer. Rigid polyurethane foam has advantages such as low thermal conductivity, low density, low water absorption, and good adhesion to metals, making it very suitable for insulation of low-temperature cold storage equipment. In addition, polystyrene foam (EPS / XPS), phenolic foam, glass wool, and other materials can also be used as alternatives; the specific selection can be determined based on cost requirements and insulation performance indicators.

[0100] The thickness of the insulation layer is a key parameter determining the insulation effect. A thicker layer results in better insulation, but also increases the overall volume and cost of the cold storage tank 1. The insulation layer thickness can be determined through thermal calculations based on the operating temperature range of the cold storage tank 1 and the ambient temperature.

[0101] The insulation layer can be formed by either casting foaming or prefabricated panel bonding. Cast foaming involves mixing polyurethane raw materials and injecting them into the cavity between the inner and outer shell layers, allowing it to foam and cure on-site to form a complete insulation layer that tightly adheres to both the inner and outer layers. This method results in a seamless insulation layer with excellent insulation performance. Prefabricated panel bonding involves attaching pre-formed insulation panels to the outer surface of the inner shell layer, with the seams sealed with sealant. This method is suitable for small cold storage tanks or on-site modifications.

[0102] The outer shell is the outermost layer of the cold storage tank 1, and its main function is mechanical protection to prevent the insulation layer from being damaged by external impact, moisture intrusion or ultraviolet radiation.

[0103] In this preferred embodiment, the outer shell layer is made of stainless steel, the same or similar material as the inner liner layer. The stainless steel shell has good mechanical strength, resisting impacts and scratches during daily use; simultaneously, the stainless steel surface is smooth, easy to clean and maintain, has good weather resistance, and is not prone to fading or aging over long-term use. The thickness of the outer shell layer is typically slightly less than that of the inner liner layer. In some alternative embodiments, the outer shell layer may also be made of other materials, such as color-coated steel sheet, aluminum sheet, fiberglass (FRP), etc.

[0104] The outer shell and inner liner are connected by an insulation layer, forming a robust composite structure. Sealing can be applied to the corners and seams of the cold storage tank 1 to prevent moisture from entering the insulation layer and affecting its insulation performance. For cold storage tanks 1 that need to be moved or hoisted, lifting lugs or bases can be installed on the outer shell.

[0105] Through the multi-layer composite wall structure consisting of an inner liner, an insulation layer, and an outer shell, the sufficiently thick, high-quality insulation layer of the cold storage tank 1 effectively isolates the internal cold energy from the external environment, greatly reducing cold energy loss and improving the overall energy efficiency of the cold storage system. The double-layer stainless steel structure provides the cold storage tank 1 with sufficient mechanical strength to withstand the static pressure of the internal refrigerant, the weight of the flexible gel ice plate 6, and possible external impact loads. In addition, the stainless steel inner liner directly contacts the refrigerant, and its excellent corrosion resistance ensures the long service life of the cold storage tank 1, avoiding the problem of rust and refrigerant contamination found in traditional carbon steel tanks. This structure allows for adjustments to the materials and thickness of each layer according to different application scenarios, making it suitable for cold storage modules in small cold storage facilities as well as for large-scale cold storage projects through reinforced design.

[0106] Figure 8 This is a schematic diagram of a refrigerant circulation system provided in an embodiment of the present invention.

[0107] like Figure 8 As shown, this embodiment provides a specific pipeline layout and valve control structure for a refrigerant circulation system, which enables flexible switching between cold storage mode, cold release mode and direct cooling mode.

[0108] In this embodiment, a refrigerant outlet and a refrigerant inlet are respectively provided on both sides of the cold storage tank. The refrigerant outlet and refrigerant inlet can be located on opposite sides of the cold storage tank, for example, the left side is the inlet and the right side is the outlet, or they can be arranged diagonally to ensure that the refrigerant can form an effective flow path in the tank, fully flow over the surface of all flexible gel ice plates, and avoid flow dead zones. Interface flanges or threaded joints can be provided at the refrigerant outlet and refrigerant inlet for connection with external pipelines.

[0109] The refrigerant circulation system mainly includes: circulation pump P, first pipeline L1, second pipeline L2, third pipeline L3, fourth pipeline L4, first valve V1, and second valve V2.

[0110] The circulating pump P is the power source that drives the refrigerant to circulate throughout the system. The circulating pump P can be a low-temperature resistant centrifugal pump or a canned motor pump, and its flow rate and head need to be selected based on the system resistance, the volume of the cold storage tank, and the user's cooling load requirements. The starting and stopping of the circulating pump P is controlled by a controller; it operates during cold storage or cold release mode and stops during standby or mode switching.

[0111] The first pipe L1 connects the outlet of the refrigeration unit to the refrigerant inlet of the cold storage tank. Specifically, one end of the first pipe L1 is connected to the refrigerant outlet of the refrigeration unit, and the other end is connected to the refrigerant inlet of the cold storage tank. In cold storage mode, the low-temperature refrigerant, cooled by the refrigeration unit, flows into the cold storage tank through the first pipe L1.

[0112] The second pipe L2 connects the refrigerant outlet of the cold storage tank to the inlet of the refrigeration unit. Specifically, one end of the second pipe L2 is connected to the refrigerant outlet of the cold storage tank, and the other end is connected to the refrigerant return port of the refrigeration unit. In cold storage mode, the refrigerant whose temperature rises after heat exchange with the flexible gel ice plate flows back to the refrigeration unit through the second pipe L2 for further cooling.

[0113] Pipeline L1 and pipeline L2 together form a cold storage circuit, used to transfer the cooling capacity generated by the refrigeration unit to the cold storage tank for storage during periods of low electricity prices. The pipes can be made of materials that are resistant to low temperatures and corrosion, such as stainless steel pipes or plastic pipes with sufficient low-temperature resistance (such as PE pipes), and are wrapped with insulation material to reduce cooling loss.

[0114] The third pipe, L3, connects the refrigerant outlet of the cold storage tank to the user-end cooling load. The user-end cooling load can be an evaporator, fan coil unit, or other heat exchange equipment requiring cooling in the cold storage facility. Specifically, one end of the third pipe, L3, is connected to the refrigerant outlet of the cold storage tank, and the other end is connected to the refrigerant inlet of the user-end cooling load. In cold release mode, the refrigerant storing cold energy in the cold storage tank flows to the user-end cooling load through the third pipe, L3, releasing the cold energy.

[0115] The fourth pipe, L4, connects the return port of the user-end cooling load to the refrigerant inlet of the cold storage tank. Specifically, one end of the fourth pipe, L4, is connected to the refrigerant outlet of the user-end cooling load, and the other end is connected to the refrigerant inlet of the cold storage tank. In the cooling release mode, the refrigerant, whose temperature rises after releasing cooling energy at the user end, flows back to the cold storage tank through the fourth pipe, L4, and comes into contact with the flexible gel ice plate again to cool down, thereby achieving the cyclical release of cooling energy.

[0116] Pipeline L3 and pipe L4 together form a cooling release loop, used to deliver the cold energy stored in the cold storage tank to users during peak electricity price periods. Similarly, these pipes also require insulation and corrosion protection.

[0117] The first valve V1 is installed on either the first pipeline L1 or the second pipeline L2. In this embodiment, the first valve V1 is preferably installed on the first pipeline L1. The first valve V1 is used to control the on / off state of the cold storage circuit. When cold storage is in progress, the first valve V1 is open, allowing the refrigerant to circulate between the refrigeration unit and the cold storage tank; when cold storage is complete or is no longer needed, the first valve V1 is closed, cutting off the cold storage circuit.

[0118] The second valve V2 is installed on either the third pipeline L3 or the fourth pipeline L4. In this embodiment, the second valve V2 is preferably installed on the third pipeline L3. The second valve V2 is used to control the on / off state of the cooling release circuit. When cooling needs to be supplied to the user end and a cooling storage tank is used for cooling release, the second valve V2 is open, allowing the refrigerant to circulate between the cooling storage tank and the user end cooling load; when cooling release is not required or other cooling modes are used, the second valve V2 is closed, cutting off the cooling release circuit.

[0119] Both valve V1 and valve V2 can be electric or solenoid valves to connect with the controller for automated control. Valve selection must consider the low-temperature characteristics of the refrigerant to ensure proper opening and closing in low-temperature environments.

[0120] Through the above-described pipeline layout and valve configuration, the gel plate cold storage device of the present invention can achieve flexible switching between three operating modes: Cold Storage Mode: During periods of low electricity prices, the first valve V1 is opened, the second valve V2 is closed, and the refrigeration unit and circulation pump P are started. The low-temperature refrigerant flows sequentially through the refrigeration unit, the first pipeline L1, the cold storage tank, and the second pipeline L2, before returning to the refrigeration unit, forming a closed loop. As the refrigerant flows through the cold storage tank, it makes full contact with the flexible gel ice plate, transferring its cooling capacity to the ice plate for storage. When the temperature of the flexible gel ice plate drops to the set value, the refrigeration unit and circulation pump P are stopped, the first valve V1 is closed, and cold storage is complete.

[0121] Cooling Release Mode: During peak electricity price periods, when there is a cooling load demand at the user end and the ice plate temperature in the cold storage tank is lower than the set value, the first valve V1 is closed, the second valve V2 is opened, and the circulation pump P is started (the refrigeration unit does not run at this time). The refrigerant flows sequentially through the cold storage tank, the third pipeline L3, the user end cooling load, and the fourth pipeline L4, before returning to the cold storage tank, forming a closed loop. The refrigerant releases cold energy when flowing through the user end cooling load and absorbs cold energy from the flexible gel ice plate to cool down again when flowing through the cold storage tank, achieving continuous release of cold energy. When the ice plate temperature rises to the end of the cooling release temperature, the circulation pump P is stopped, the second valve V2 is closed, and the cooling release is complete.

[0122] Direct cooling mode: When there is a cooling load demand at the user end but the ice plate in the cold storage tank has insufficient cooling capacity or needs to maintain the cooling capacity of the ice plate for peak periods, the first valve V1 and the second valve V2 can be closed, and the refrigeration unit and circulation pump P can be started. At the same time, the refrigerant can flow directly through the refrigeration unit and the user end cooling load through the bypass pipeline or by switching valves, and the refrigeration unit directly supplies cooling to the user end. In this mode, the refrigerant does not flow through the cold storage tank, or it flows through but the cold storage tank does not participate in heat exchange.

[0123] In an optional embodiment, the gel plate cold storage device further includes a temperature monitoring system for real-time monitoring of the internal thermal state of the device, providing a basis for decision-making in the control system.

[0124] The temperature monitoring system includes at least one temperature sensor. The type of temperature sensor can be a thermocouple, a resistance temperature detector (RTD) such as a PT100 platinum resistance thermometer, or a thermistor, depending on the required measurement accuracy and cost. The temperature sensor is located inside the cold storage tank and / or on the surface of the flexible gel ice plate.

[0125] Specifically, the arrangement of temperature sensors includes, but is not limited to, the following: Refrigerant Temperature Monitoring: Temperature sensors are installed inside the cold storage tank to monitor the temperature of the refrigerant. For example, temperature sensors T1 can be installed at the refrigerant inlet and outlet of the cold storage tank to monitor the temperature of the refrigerant entering and leaving the tank, thereby calculating the heat exchange and heat exchange efficiency during the cold storage or release process. Multiple temperature sensors can also be installed at different heights and locations within the cold storage tank to monitor the uniformity of the refrigerant temperature distribution and prevent localized overheating or overcooling.

[0126] Temperature monitoring of flexible gel ice plates: A temperature sensor T2 is installed on or inside the flexible gel ice plate to directly monitor the temperature of the gel material. Since the gel material is the main body for storing cold energy, its temperature directly reflects the degree of completion of cold storage or release. For example, a thin-film temperature sensor can be attached to the surface of at least one flexible gel ice plate, or a miniature temperature sensor can be encapsulated inside the gel material to monitor the real-time temperature of the gel.

[0127] Multiple sensor placement: To gain a more comprehensive understanding of the thermal state of the device, multiple temperature sensors can be placed at different locations within the cold storage tank and on multiple flexible gel ice plates to form a temperature monitoring network. The monitoring data from these sensors can be transmitted to the controller for temperature field analysis, fault diagnosis, and optimized control.

[0128] The temperature monitoring system described above can monitor the temperature changes of the refrigerant in the cold storage tank and the cold storage status of the flexible gel ice plate in real time, providing an accurate data basis for subsequent automated control.

[0129] In an optional embodiment, the gel plate cold storage device further includes a controller for automating the operation of the device. The controller is electrically connected to the aforementioned temperature monitoring system, refrigeration unit, circulating pump P, first valve V1, and second valve V2, receives monitoring signals from the temperature sensor, and issues control commands according to preset control logic.

[0130] The controller can be a programmable logic controller (PLC), a microcontroller (MCU), an embedded system, or an industrial control computer, depending on the complexity of the control. The controller has a pre-set control program for automatically switching between cold storage mode, cold release mode, and direct cooling mode.

[0131] The controller's specific configuration is as follows: When the cold storage start-up conditions are met (such as during off-peak electricity periods and when the temperature of the flexible gel ice plate is higher than the first set value), the controller performs the following operations: Open the first valve V1, close the second valve V2, and start the refrigeration unit and circulation pump P to put the device into cold storage mode.

[0132] Specifically, the controller first determines whether the temperature of the flexible gel ice plate is higher than a first set value. The first set value is a preset temperature threshold used to determine whether cold storage needs to be activated. For example, when the phase change temperature of the gel material is 0°C, the first set value can be set to 2°C or higher, indicating that the gel has basically melted and cold storage needs to be restarted. If the temperature is higher than the first set value, the controller issues the following instructions: open the first valve V1 on the cold storage circuit (i.e., the pipeline between the refrigeration unit and the cold storage tank), close the second valve V2 on the cold release circuit (i.e., the pipeline between the cold storage tank and the user end), ensuring that the refrigerant circulates only between the refrigeration unit and the cold storage tank; simultaneously, the refrigeration unit is activated to generate low-temperature refrigerant; and the circulation pump P is activated to drive the refrigerant flow.

[0133] During the cold storage process, a low-temperature refrigerant continuously flows through the cold storage tank, exchanging heat with the flexible gel ice plate, causing the gel material to gradually cool and freeze, thus storing cold energy. The controller continuously receives temperature data from the temperature sensor monitoring the flexible gel ice plate.

[0134] When the temperature of the flexible gel ice plate drops to the second set value, the controller determines that cold storage is complete and issues a command to stop cold storage. The second set value is the target temperature at which cold storage ends, for example, it can be set to -2℃ (the temperature at which the gel is completely frozen). When the gel temperature is detected to reach -2℃, the controller closes the first valve V1, stops the refrigeration unit and the circulation pump P, and the cold storage mode ends.

[0135] When the cooling start-up conditions are met (such as during peak electricity pricing periods, when users have cooling load demands, and when the temperature of the flexible gel ice plate is below the third set value), the controller will perform the following operations: Open the second valve V2, close the first valve V1, and start the circulation pump P (the refrigeration unit is usually not started) to put the unit into the cooling release mode.

[0136] Specifically, the controller first determines whether there is a cooling load demand from the user. This can be achieved by receiving temperature signals or cooling request signals from the user. For example, when the cold storage temperature rises to 10°C, it indicates that cooling is needed. Simultaneously, the controller checks whether the temperature of the flexible gel ice plate is below a third set value. The third set value is a preset temperature threshold used to determine whether there is sufficient cold energy remaining in the ice plate for release. For example, the third set value can be set to -1°C, indicating that the gel is still frozen and has cold storage capacity. If there is a cooling demand from the user and the gel temperature is below the third set value, the controller issues a command: opens the second valve V2 on the cold release circuit and closes the first valve V1 on the cold storage circuit, ensuring that the refrigerant circulates only between the cold storage tank and the user; simultaneously, it starts the circulation pump P to drive the refrigerant flow.

[0137] During the cooling process, the refrigerant flows out of the cold storage tank, carrying the cold energy to the user end (such as the heat exchanger in a cold storage facility). After absorbing heat and rising in temperature, it returns to the cold storage tank to contact the flexible gel ice plate for cooling. This cycle continues, gradually releasing the cold energy stored in the ice plate. The controller continuously receives temperature data from the temperature sensor monitoring the temperature of the flexible gel ice plate.

[0138] When the temperature of the flexible gel ice plate rises to the fourth set value, the controller determines that the cooling release is complete and issues a command to stop the cooling release. The fourth set value is the termination temperature at which the cooling release ends. For example, it can be set to 0°C or slightly higher than the phase transition temperature (such as 0.5°C), indicating that the gel has basically melted and all the stored latent heat has been released. When the gel temperature is detected to have reached the fourth set value, the controller closes the second valve V2, stops the circulation pump P, and the cooling release mode ends.

[0139] When there is a cooling load demand at the user end, but the temperature of the flexible gel ice plate is higher than the third set value (i.e., the cooling capacity inside the ice plate is insufficient), the controller can switch to direct cooling mode. At this time, the controller closes the first valve V1 and the second valve V2, starts the refrigeration unit, and allows the refrigeration unit to directly supply cooling to the user end without passing through the cold storage tank.

[0140] With the cooperation of the temperature monitoring system and controller described above, the gel plate cold storage device of this invention achieves fully automated operation management. It can automatically switch working modes according to preset strategies and real-time temperature, ensuring precise control of cold energy storage and release, maximizing the use of peak and off-peak electricity price differences, reducing operating costs, and improving the reliability and intelligence level of the system.

[0141] It should be noted that the term "comprising" and its variations used in the embodiments of the present invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of the present invention are illustrative and not restrictive. Those skilled in the art should understand that, unless explicitly indicated otherwise in the context, they should be understood as "one or more".

[0142] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in the embodiments of the present invention are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0143] The steps described in the method embodiments provided by this invention can be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of protection of this invention is not limited in this respect.

[0144] The term "embodiment" in this specification refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply independence or alternativeity from other embodiments. The various embodiments in this specification are described in a related manner, with reference to each other for similar or identical parts. In particular, for apparatus, device, and system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, and relevant details are referred to in the description of the method embodiments.

[0145] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A gel plate cold storage device, characterized in that, include: Cold storage tank, flexible gel ice plate, refrigerant circulation system and refrigeration unit; The cold storage tank is filled with a refrigerant and is equipped with at least one suspension crossbar, on which at least one of the flexible gel ice plates is hung. A refrigerant circulation system is provided, which is connected to the cold storage tank and the refrigeration unit respectively, to allow the refrigerant to flow between the cold storage tank and the refrigeration unit, so that the refrigerant can come into contact with the flexible gel ice plate for heat exchange.

2. The cold storage device according to claim 1, characterized in that, The flexible gel ice plate is composed of multiple interconnected flexible packaging bags, which are configured as cylindrical or flat; the flexible packaging bags contain gel ice and snow material that maintains a solid state throughout the phase change process.

3. The cold storage device according to claim 2, characterized in that, The flexible packaging bag is composed of a multi-layer composite film, which includes an inner heat-sealing layer, a middle reinforcing layer, and an outer protective layer.

4. The cold storage device according to claim 1, characterized in that, The suspension crossbar is provided with a first crossbar body, and a first connecting part is provided below the first crossbar body. A fixing through hole is provided through the first connecting part, and a through groove is provided below the fixing through hole. The flexible gel ice plate is fixed in the fixing through hole by the uppermost flexible packaging bag.

5. The cold storage device according to claim 1, characterized in that, The suspension crossbar is provided with a second crossbar body, and a second connecting part is provided below the second crossbar body. The second connecting part is provided with a fixed crossbar and a fixed plate. A plurality of fixing posts are arranged in sequence on one side of the fixed crossbar, and a first fixing hole adapted to the plurality of fixing posts is provided on the fixing plate; The upper end of the flexible gel ice plate is provided with a third connecting part, and the third connecting part is provided with a second fixing hole adapted to the plurality of fixing posts; the flexible gel ice plate is fixed to the fixing post of the fixing crossbar through the second fixing hole.

6. The cold storage device according to claim 1, characterized in that, A crossbar support device is fixed inside the cold storage tank. The crossbar support device is provided with a receiving groove adapted to the suspension crossbar. A suspension reinforcing rib is provided below the receiving groove. The receiving groove and the suspension reinforcing rib are configured as an integral structure. The suspension crossbar is placed inside the receiving groove.

7. The cold storage device according to claim 1, characterized in that, The cold storage tank includes an inner liner, an insulation layer, and an outer shell, arranged sequentially from the inside out.

8. The cold storage device according to claim 1, characterized in that, The cold storage tank has a refrigerant outlet and a refrigerant inlet on both sides; the refrigerant circulation system includes: a circulation pump, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a first valve, and a second valve; The circulating pump drives the flow of the refrigerant; The first pipeline connects the outlet of the refrigeration unit to the refrigerant inlet of the cold storage tank; The second pipeline connects the refrigerant outlet of the cold storage tank to the inlet of the refrigeration unit; The third pipeline connects the refrigerant outlet of the cold storage tank to the user-end cooling load. The fourth pipeline is connected to the refrigerant inlet of the cold storage tank, which is the return flow of the user's cold load. The first valve is installed in either the first pipe or the second pipe; The second valve is installed in either the third or the fourth pipeline.

9. The cold storage device according to claim 1, characterized in that, It also includes a temperature monitoring system, which includes at least one temperature sensor disposed inside the cold storage tank and / or on the surface of the flexible gel ice plate, for real-time monitoring of the temperature of the refrigerant and the temperature of the flexible gel ice plate.

10. The cold storage device according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the temperature sensor, the refrigeration unit, the circulating pump, the first valve, and the second valve; the controller is configured to: When the temperature of the flexible gel ice plate is higher than the first set value, the first valve is opened, the second valve is closed, and the refrigeration unit is started to store cold until the temperature of the flexible gel ice plate drops to the second set value and then stops. When the user has a cooling load requirement and the temperature of the flexible gel ice plate is lower than the third set value, the second valve is opened, the first valve is closed, and the circulation pump is started to release cold until the temperature of the flexible gel ice plate rises to the fourth set value and then stops.

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