Cold storage device and power peak shaving system

Abstract

The application discloses a kind of cold storage equipment and electric power peak shaving system, wherein, cold storage equipment includes: container, defines and contains pool;Heat water, is located in containing pool;Multiple heat exchangers, are located in containing pool, heat exchanger is configured to be used to cool heat water, each heat exchanger is arranged in rectangular array, and each heat exchanger is arranged with interval;Column separation plate, is located between each column heat exchanger, and it is arranged parallel to the direction of each heat exchanger column;Row separation plate, is located between two adjacent heat exchangers in the same row, and it is arranged parallel to the direction of each heat exchanger row;Heat exchange pipeline, including inlet pipe and outlet pipe, inlet pipe and outlet pipe are oppositely arranged in the both ends of container along the direction parallel to each heat exchanger column.The scheme, heat exchanger will melt ice one by one in turn, hot water cannot bypass current heat exchanger and reach next heat exchanger, to avoid the phenomenon of "thousand years ice" occurs.

Description

[0001] This application is a divisional application of the application filed on January 10, 2023, with application number 2023100342421 and invention title "Cold Storage Equipment and Power Peak Shaving System". Technical Field

[0002] This invention relates to the field of new energy, and in particular to a cold storage device and a power peak-shaving system. Background Technology

[0003] Due to industrial development and the improvement of people's material and cultural living standards, the penetration rate of air conditioning has been increasing year by year, leading to a rapid increase in electricity consumption, peak-hour power shortages, and insufficient utilization of off-peak power. Therefore, how to shift peak electricity demand, "peak shifting and valley filling," balance power supply, and improve the effective utilization of electricity has become a problem that many countries are currently focusing on solving. The adoption of "time-of-use pricing" policies and certain incentive policies have further promoted the use of off-peak power. This has led to the attention and development of off-peak cold storage technology. Ice storage air conditioning utilizes off-peak electricity generated at night to produce ice, which is stored in ice storage devices. The latent heat of phase change of the ice is used to store the cold energy, and the stored cold energy is released during the day by melting the ice, thereby reducing the air conditioning load and the installed capacity of the air conditioning system during peak hours.

[0004] In existing technologies, heat exchangers used for refrigeration are placed in a pool filled with hot water for cooling. When electricity prices are low at night, the heat exchanger operates and cools the hot water, causing it to freeze. During the day, when electricity prices are high, the heat exchanger stops operating and removes the cooled water for use in air conditioning or other industries. Conventional coil-based external ice-melting systems treat the entire ice storage pool as a single unit. Generally, high-temperature water is introduced from one end of the pool, and low-temperature water is extracted from the other, utilizing natural convection heat exchange within the pool to melt the ice. However, this method suffers from uneven ice layer formation on the outer surface of the heat exchanger coils, easily creating dead zones in the water flow and resulting in localized, difficult-to-melt ice layers (millennial ice). To address this issue, conventional coil-based external ice-melting systems typically employ agitation to promote ice melting. However, with agitation, the hot water in the entire ice storage pool is treated as a single unit, preventing the tiered utilization of cooling capacity, leading to reduced cooling capacity and lower energy efficiency. Summary of the Invention

[0005] The main objective of this invention is to propose a cold storage device and a power peak-shaving system that can fully melt the ice on each heat exchanger and prevent the formation of "thousand-year-old ice".

[0006] To achieve the above objectives, the present invention provides a cold storage device, comprising:

[0007] A container defines a holding space;

[0008] Hot water is provided within the aforementioned container tank;

[0009] A partition plate is disposed within the receiving pool to divide the space within the receiving pool;

[0010] The partition plate has a partitioned state that separates the containing pool and a non-partitioned state that removes the partition. In the partitioned state, the partition plate inflates and expands, and in the non-partitioned state, the partition plate deflates and contracts.

[0011] In some embodiments, the cold storage device further includes a plurality of heat exchangers and heat exchange pipelines;

[0012] Each of the heat exchangers is disposed in the containment tank. The heat exchangers are configured to cool the hot water. The heat exchangers are arranged in a rectangular array and are spaced apart from each other.

[0013] The heat exchange pipeline includes an inlet pipe and an outlet pipe, which are arranged opposite each other at both ends of the container along a direction parallel to the columns of the heat exchangers.

[0014] The partition plate includes column partition plates and row partition plates. The column partition plates are disposed between each column of heat exchangers and are arranged parallel to the column direction of each heat exchanger. The row partition plates are disposed between two adjacent heat exchangers in the same row and are arranged parallel to the row direction of each heat exchanger.

[0015] The column separator and the row separator have a separated state and a non-separated state; in the separated state, the column separator is inflated and deflates to separate the flow of hot water between the heat exchangers in each column, and the row separator is inflated and deflates to separate the flow of hot water between rows; in the non-separated state, the column separator is deflated and contracts to allow the hot water near the heat exchangers in each column to flow, and the row separator is deflated and contracts to allow the hot water near the heat exchangers in each row to flow.

[0016] In some embodiments, in each row of heat exchangers, a row separator is provided between every two adjacent heat exchangers;

[0017] Each column of heat exchangers is provided with a column separator plate.

[0018] In some embodiments, both the column separators and the row separators are made of heat-insulating material.

[0019] In some embodiments, the row separator retracts vertically to switch between the separated state and the non-separated state, and the column separator retracts vertically to switch between the separated state and the non-separated state;

[0020] The row divider is connected to the bottom wall of the container, and the row divider can retract downwards to any position within its travel range; the column divider is connected to the bottom wall of the container, and the column divider can retract downwards to any position within its travel range.

[0021] In some embodiments, the cold storage device further includes an intermediate partition plate disposed between each row of heat exchangers, with the upper end of the intermediate partition plate exceeding the liquid level of the hot water and the lower end of the intermediate partition plate spaced apart from the bottom of the container.

[0022] In some embodiments, the intermediate partition is configured to retract upwards.

[0023] A second aspect of this application also provides a power peak-shaving system, including the cold storage device described in any of the above claims.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] In the technical solution of this invention, the cold storage device includes a container, hot water for heat exchange, multiple heat exchangers, column partitions, row partitions, and heat exchange piping. The container defines a receiving pool. The hot water for heat exchange is located within the receiving pool. Multiple heat exchangers are located within the receiving pool and are configured to cool the hot water. The heat exchangers are arranged in a rectangular array with intervals between them. Column partitions are located between the columns of heat exchangers and are arranged parallel to the column direction of each heat exchanger. Row partitions are located between two adjacent heat exchangers in the same row and are arranged parallel to the row direction of each heat exchanger. The heat exchange piping includes an inlet pipe and an outlet pipe, which are arranged opposite each other at both ends of the container along a direction parallel to the column direction of each heat exchanger. The column partition plate and the row partition plate have a partitioned state and a non-partitioned state. In the partitioned state, the column partition plate separates the flow of hot water between each column of heat exchangers, and the row partition plate is used to separate the flow of hot water between rows. In the non-partitioned state, the column partition plate allows the hot water near each column of heat exchangers to flow, and the hot water near each row of heat exchangers to flow.

[0026] In the embodiment of this application, column partitions are used to prevent the flow of hot water between heat exchangers in different columns. That is, between heat exchangers in the same column, hot water can only flow in a direction parallel to the column. Because the row partitions separate the gaps between two adjacent heat exchangers in the same row, when all row partitions are in the divided state, the hot water flowing from the inlet pipe to the outlet pipe cannot flow through the gaps between two heat exchangers in the same row. The hot water must pass through the preceding heat exchanger before reaching the following one. In other words, the heat exchangers melt ice one by one, and the hot water cannot bypass the current heat exchanger to reach the next one. This avoids the problem of ice on a certain corner heat exchanger never melting, preventing the phenomenon of "thousand-year-old ice" and improving the utilization efficiency of ice. The segmented ice melting method proposed in this patent can also melt the ice layers of different rows of heat exchangers one by one by using the alternating states of the row partitions. For example, if the row dividers in the first row are in an open state, while the dividers in the remaining rows are in a divided state, as the hot water flows from the inlet pipe to the outlet pipe, because the flow resistance of the heat exchanger is much greater than the flow channels between the heat exchangers, most of the hot water will bypass the first row of heat exchangers, flow through the flow channels on both sides of the first row of heat exchangers, and enter the second row of heat exchangers, thus preferentially melting the ice layer in the second row of heat exchangers. Similarly, by changing the division state of the row dividers in different rows, the ice layer in different rows of heat exchangers can be melted in stages.

[0027] Furthermore, both row and column partitions utilize inflation and deflation to switch between partitioned and non-partitioned states. This makes the state switching process more convenient. On the other hand, this solution is applicable to large-volume cold storage systems. When the row and column partitions are large, other state switching methods require dividing each partition into multiple independently movable smaller components. However, with inflation and deflation, regardless of the size of a single row or column partition, a single component can be used. Moreover, when the row and column partitions are inflated, their interiors are filled with air, providing excellent thermal insulation. Compared to using solid insulation materials, this reduces the cost of the partitions. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a top view of a cold storage device according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A sectional view;

[0031] Figure 3 This is a schematic diagram of the structure of the row separator in one embodiment of the present invention;

[0032] Figure 4 This is a top view of a cold storage device according to another embodiment of the present invention.

[0033] Explanation of icon numbers:

[0034] 10 cold storage devices;

[0035] Container 100; Reservoir 110;

[0036] 200 for hot water replacement;

[0037] Row divider 310; first sub-strip 311; first pull cord 312; column divider 320; intermediate divider 330;

[0038] Heat exchanger 400;

[0039] Inlet pipe 510; outlet pipe 520.

[0040] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] In existing technologies, heat exchangers used for refrigeration are placed in a pool filled with hot water for cooling. When electricity prices are low at night, the heat exchanger operates and cools the hot water, causing it to freeze. During the day, when electricity prices are high, the heat exchanger stops operating and removes the cooled water for further cooling. Conventional coil-based external ice-melting systems treat the entire ice storage pool as a single unit. Generally, high-temperature water is introduced from one end of the pool, and low-temperature water is extracted from the other, utilizing natural convection heat exchange within the pool to melt the ice. However, this method suffers from uneven ice layer formation on the outer surface of the heat exchanger coils, easily creating dead zones in the water flow and resulting in localized, difficult-to-melt ice layers (millennial ice). To address this issue, conventional coil-based external ice-melting systems typically employ agitation to promote ice melting. However, with agitation, the hot water in the entire ice storage pool is treated as a single unit, preventing the tiered utilization of cooling capacity, leading to reduced cooling capacity and lower energy efficiency.

[0045] After repeated experiments and numerical simulation calculations, the applicant discovered that the reason for the "millennial ice" is that the hot water flowing out of the inlet pipe does not pass through some heat exchangers located in corners on the path to the outlet pipe. Therefore, even if the ice on some heat exchangers has not melted, the hot water cannot effectively exchange heat with it and cannot melt the ice within one melting cycle.

[0046] In view of this, see Figure 1-4 This embodiment provides a cold storage device 10, which includes a container 100, a hot water exchanger 200, multiple heat exchangers 400, column partition plates 320, row partition plates 310, and heat exchange pipelines. The partition plates include row partition plates 310 and column partition plates 320.

[0047] Container 100 defines a receiving pool 110, which contains hot water 200. In specific implementations, container 100 can be a structure made of concrete; for example, container 100 can be constructed of reinforced concrete to form a receiving pool 110 capable of holding the hot water 200. Of course, in other embodiments, container 100 can also be a receiving pool 110 capable of holding the hot water 200 constructed of materials such as metal or plastic sheeting. Container 100 can be open or closed; in this embodiment, the upper part of container 100 is open.

[0048] Heat exchangers 400 are used to cool the hot water 200, specifically to freeze it at night when electricity prices are low. After cooling, a layer of condensed ice forms on the outer wall of the coils of each heat exchanger 400. This ice melts during the day and can then be used to cool the outside environment, effectively storing the electricity generated at night for daytime use. The heat exchangers 400 are arranged in a rectangular array, with each heat exchanger 400 divided into several columns along the row direction and several rows along the column direction. See, for example, [link to example]. Figure 1 It has two containment pools 110, each containing eight heat exchangers 400 arranged in four rows and two columns. In some embodiments, it has multiple containment pools 110, each containing multiple heat exchangers 400 arranged in multiple rows and columns.

[0049] The heat exchange piping system can guide the cold water in the container 110 to external refrigeration equipment for cooling. The heat exchange piping system includes an inlet pipe 510 and an outlet pipe 520, which are arranged opposite each other at both ends of the container 100 in a direction parallel to the rows of heat exchangers 400. After heat exchange with the external refrigeration equipment, the hot water 200 becomes hot water, which is then introduced into the container 110 through the inlet pipe 510. After exchanging heat with ice, the hot water becomes cold water again, which is then directed to the external refrigeration equipment through the outlet pipe 520, thus completing the cycle. Within the container 110, the flow direction of the hot water is parallel to the row direction of the heat exchangers 400.

[0050] See Figure 1Column partition plates 320 are disposed between each column of heat exchangers 400 and arranged parallel to the column direction of each heat exchanger 400. Row partition plates 310 are disposed between two adjacent heat exchangers 400 in the same row and arranged parallel to the row direction of each heat exchanger 400. The column partition plates 320 and row partition plates 310 have separated and non-separated states. In the separated state, the column partition plates 320 separate the flow of hot water 200 between each column of heat exchangers 400, and the row partition plates 310 separate the flow of hot water 200 between rows. The column partition plates 320 prevent the hot water 200 from flowing between different columns. The row partition plates 310 only prevent the hot water 200 from passing through the gap between two adjacent heat exchangers 400 along the column direction. In the non-separated state, the column partition plates 320 allow the hot water 200 near each column of heat exchangers 400 to flow, and the hot water 200 near each row of heat exchangers 400 to flow.

[0051] In the embodiment of this application, column separators 320 are used to prevent the flow of hot water 200 between heat exchangers 400 in each column. That is, between heat exchangers 400 in the same column, hot water 200 can only flow in a direction parallel to the column. Since the row separators 310 separate the gaps between two adjacent heat exchangers 400 in the same row, the hot water flowing from the inlet pipe 510 to the outlet pipe 520 cannot flow in the gaps between two heat exchangers 400 in the same row. The hot water must pass through the previous heat exchanger 400 before reaching the next heat exchanger 400. That is, the heat exchangers 400 will melt ice one by one. Hot water cannot bypass the current heat exchanger 400 to reach the next heat exchanger 400, thereby avoiding the problem of ice on a certain corner of the heat exchanger 400 never melting, avoiding the phenomenon of "thousand-year-old ice", and improving the utilization efficiency of ice. The segmented ice-melting method proposed in this patent can also melt the ice layers of different rows of heat exchangers 400 one by one by alternating the separation states of the row partition plates 310. For example, if the row partition plates 310 of the first row are in an open state and the partition plates 310 of the remaining rows are in a separated state, during the process of hot water flowing from the inlet pipe to the outlet pipe, because the flow resistance of the heat exchangers 400 is much greater than the flow channels between the heat exchangers 400, most of the hot water will bypass the first row of heat exchangers 400, flow through the flow channels on both sides of the first row of heat exchangers 400, and enter the second row of heat exchangers 400, thus preferentially melting the ice layers of the second row of heat exchangers 400. By analogy, the ice layers of different rows of heat exchangers 400 can be melted segmentally by changing the separation states of the row partition plates 310.

[0052] In some embodiments, a row partition plate 310 is provided between every two adjacent heat exchangers 400 in each row of heat exchangers 400. A column partition plate 320 is provided between each column of heat exchangers 400. When there are eight heat exchangers 400 arranged in four rows and two columns, at least one column partition plate 320 and four row partition plates 310 are provided.

[0053] In some embodiments, both the column partition 320 and the row partition 310 are made of insulating material. In this design, the partitions not only separate the hot water 200 but also prevent the heat from escaping, thereby enabling the heat exchanger 400 to melt ice sequentially.

[0054] The state switching method of row separator 310 and column separator 320 can be determined according to actual needs. In some embodiments, row separator 310 moves up and down to switch between a separated state and a non-separated state, and column separator 320 moves up and down to switch between a separated state and a non-separated state. In other embodiments, row separator 310 retracts up and down to switch between a separated state and a non-separated state, and column separator 320 retracts up and down to switch between a separated state and a non-separated state. In this solution, row separator 310 and column separator 320 occupy less space and are easier to switch between states.

[0055] The contraction method of the row divider 310 and column divider 320 depends on the actual needs. In some embodiments, the row divider 310 and column divider 320 contract and expand by inflating and deflating air. For example, when separation is required, air can be inflated into the row divider 310 and column divider 320 to open the dividers and thus create separation. When contraction is required, the air inside the dividers can be expelled, causing the dividers to naturally contract and float or sink, thereby stopping the separation. Using an inflation and deflation method facilitates the switching of the state of the row divider 310 and column divider 320, and also facilitates heat insulation; when the row divider 310 and column divider 320 are filled with air, effective heat insulation is achieved.

[0056] When the row divider 310 and column divider 320 retract, both can retract upwards or downwards. In some embodiments, the row divider 310 retracts vertically to switch between a divided state and a non-divided state, and the column divider 320 retracts vertically to switch between a divided state and a non-divided state. The row divider 310 is connected to the bottom wall of the container 100 and can retract downwards to any position within its travel range. The column divider 320 is connected to the bottom wall of the container 100 and can retract downwards to any position within its travel range. In this embodiment, both the row divider 310 and column divider 320 retract downwards. In this scheme, even if the row divider 310 and column divider 320 retract downwards a short distance, because hot water has a low density and is distributed at the top, the hot water can still flow to any position in the container 110. This scheme facilitates the flow of hot water in the non-divided state.

[0057] In some embodiments, the density of the row divider 310 is less than the density of the hot water exchanger 200, and the density of the column divider 320 is less than the density of the hot water exchanger 200. This design allows the row divider 310 and column divider 320 to be switched by simply pulling them downwards. This makes the switching of the row divider 310 and column divider 320 easier to achieve.

[0058] See Figure 3In some embodiments, the row dividers 310 are arranged in a laterally bent and stacked manner, and the row dividers 310 include a plurality of first sub-strips 311. In the non-divided state, the plurality of first sub-strips 311 are bent and stacked in a wave shape. The row dividers 310 also include a first pull rope 312. The upper end of the first pull rope 312 is connected to the uppermost first sub-strip 311, and the lower end of the first pull rope 312 is located at the bottom of the container 100. The first pull rope 312 achieves the retraction of the row dividers 310 by pulling the uppermost first sub-strip 311. The column divider 320 is arranged in a horizontally bent and stacked manner, and includes multiple second sub-strips. In the non-divided state, the multiple second sub-strips are stacked in a wavy bent manner. The column divider 320 also includes a second pull rope. The upper end of the second pull rope is connected to the uppermost second sub-strip, and the lower end of the second pull rope is located at the bottom of the container 100. The second pull rope pulls the uppermost second sub-strip to achieve the retraction of the column divider 320. In this scheme, since the areal density of both the row divider 310 and the column divider 320 is less than that of the hot water exchanger 200, when the first pull rope 312 does not pull the first sub-strip 311, the row divider 310 is in an upward floating state. The first sub-strips 311 will eventually be arranged in a vertically parallel structure, and the row divider 310 as a whole is plate-shaped. When the first pull rope 312 pulls the uppermost first sub-strip 311, the first sub-strips 311 bend and stack together, causing the row divider 310 to contract downwards. Similarly, when the second pull rope does not pull the second sub-strips, the column divider 320 is in an upward-floating state, and the second sub-strips will eventually be arranged in a vertically parallel configuration, making the column divider 320 as a whole plate. When the second pull rope pulls the uppermost second sub-strip, the second sub-strips bend and stack together, causing the column divider 320 to contract downwards.

[0059] The first pull rope 312 and the second pull rope can be pulled automatically by a motor. For example, a motor can be installed below the row divider plate 310, and the lower end of the first pull rope 312 can be wound around the motor shaft. When the motor rotates, the first pull rope 312 can be pulled.

[0060] See Figure 4In some embodiments, the cold storage device 10 further includes an intermediate partition plate 330, which is disposed between each row of heat exchangers 400. The upper end of the intermediate partition plate 330 is higher than the liquid surface of the hot water 200, and the lower end of the intermediate partition plate 330 is spaced apart from the bottom of the container 100. Alternatively, the bottom of the intermediate partition plate may be provided with a connecting hole or a connecting device. Because hot water has a lower density and cold water has a higher density, the hot water floats above the cold water and exchanges heat with the cold water through natural convection. In this design, the upper end of the intermediate partition plate 330 is higher than the liquid level of the hot water 200, preventing the hot water from passing through the intermediate partition plate 330. The lower end of the intermediate partition plate 330 is spaced apart from the bottom wall of the container 100, or the bottom of the intermediate partition plate is provided with a connecting hole or connecting device. This allows the hot water to pass through the gap between the intermediate partition plate 330 and the bottom of the container 100, or the connecting hole or connecting device at the bottom of the intermediate partition plate 330, when it reaches the lower end of the intermediate partition plate 330, thus continuing to melt the ice on the next heat exchanger 400. This structural arrangement can further promote the sequential melting of ice in each heat exchanger 400.

[0061] In some embodiments, the intermediate partition 330 is configured to retract upwards. The retraction method of the intermediate partition 330 can be referenced to that of the row partition 310 and the column partition 320, and will not be described in detail here.

[0062] A second aspect of this application also provides a power peak-shaving system, which includes the cold storage device 10 in any of the above embodiments. Specifically, the power peak-shaving system may further include a cooling device for cooling the external environment. The cold water discharged from the cold storage device 10 is returned to the receiving tank 110 after heat exchange through the cooling device. The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the inventive concept of the present invention and the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A cold storage device, characterized in that, include: A container defines a holding space; Hot water is provided within the aforementioned container tank; A partition plate is disposed within the receiving pool to divide the space within the receiving pool; Multiple heat exchangers and heat exchange pipelines are provided, each heat exchanger is located in the containment tank, the heat exchangers are configured to cool the hot water, and the heat exchangers are arranged in a rectangular array with intervals between them. The heat exchange pipeline includes an inlet pipe and an outlet pipe, which are arranged opposite each other at both ends of the container along a direction parallel to the columns of the heat exchangers. The partition plate includes column partition plates and row partition plates. The column partition plates are disposed between each column of heat exchangers and are arranged parallel to the column direction of each heat exchanger. The row partition plates are disposed between two adjacent heat exchangers in the same row and are arranged parallel to the row direction of each heat exchanger. The column separator and the row separator have a separated state and a non-separated state; in the separated state, the column separator is inflated and deflated to separate the flow of hot water between each column of heat exchangers, and the row separator is inflated and deflated to separate the flow of hot water between rows. In the non-separated state, the column separators vent and contract to allow the hot water near each column of heat exchangers to conduct, and the row separators vent and contract to allow the hot water near each row of heat exchangers to conduct.

2. The cold storage device as described in claim 1, characterized in that, In each row of heat exchangers, a row separator is provided between every two adjacent heat exchangers; Each column of heat exchangers is provided with a column separator plate.

3. The cold storage device as described in claim 1, characterized in that, Both the column dividers and the row dividers are made of heat-insulating material.

4. The cold storage device as described in claim 1, characterized in that, The row separator retracts vertically to switch between the separated state and the non-separated state, and the column separator retracts vertically to switch between the separated state and the non-separated state. The row divider is connected to the bottom wall of the container, and the row divider can retract downwards to any position within its travel range; the column divider is connected to the bottom wall of the container, and the column divider can retract downwards to any position within its travel range.

5. The cold storage device as described in claim 1, characterized in that, The cold storage device also includes an intermediate partition plate, which is disposed between each row of heat exchangers. The upper end of the intermediate partition plate is higher than the liquid level of the hot water, and the lower end of the intermediate partition plate is spaced apart from the bottom of the container.

6. The cold storage device as described in claim 5, characterized in that, The intermediate partition is configured to retract upwards.

7. A power peak-shaving system, characterized in that, Includes the cold storage device as described in any one of claims 1-6.

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