Refrigeration energy storage equipment and system

Abstract

The utility model relates to refrigeration energy storage equipment and system. The refrigeration energy storage equipment comprises an energy storage device, a refrigeration device, a heat exchange device and a control device, a first circulating loop is arranged between the refrigerating device and the energy storage device, and a first circulating pump is arranged on the first circulating loop; a second circulating loop is arranged between the energy storage device and the heat exchange device, and a second circulating pump is arranged on the second circulating loop; the control device is electrically connected with the energy storage device, the refrigerating device, the heat exchange device, the first circulating pump and the second circulating pump. The technical problems that an existing energy storage technology is low in efficiency, high in cost and narrow in application range, and it is difficult to effectively utilize low-price electricity to store energy to meet the high-price electricity period requirement are solved.

Description

Technical Field

[0001] This application relates to the field of energy storage and refrigeration technology, and in particular to a refrigeration energy storage device and system. Background Technology

[0002] Currently, with the continuous increase in energy costs and the pursuit of energy efficiency, peak-valley electricity pricing policies have been widely implemented. Against this backdrop, how to effectively utilize low-priced electricity at night for energy storage to meet energy demand during peak daytime electricity periods has become an urgent problem to solve. Traditional cooling methods are costly to operate during peak daytime electricity periods, while existing energy storage technologies suffer from drawbacks such as low storage efficiency, high cost, and narrow applicability. Utility Model Content

[0003] This application provides a cooling energy storage device and system to solve the technical problems of existing energy storage technologies, such as low efficiency, high cost, narrow applicability, and difficulty in effectively utilizing low-priced electricity to meet demand during periods of high-priced electricity.

[0004] In a first aspect, this application provides a refrigeration energy storage device, including an energy storage device, a refrigeration device, a heat exchange device, and a control device; a first circulation loop is provided between the refrigeration device and the energy storage device, and a first circulation pump is provided on the first circulation loop; a second circulation loop is provided between the energy storage device and the heat exchange device, and a second circulation pump is provided on the second circulation loop; the control device is electrically connected to the energy storage device, the refrigeration device, the heat exchange device, the first circulation pump, and the second circulation pump.

[0005] As an alternative example, the antifreeze in the energy storage device flows to the refrigeration device through the first circulation loop and back to the energy storage device through the first circulation loop.

[0006] As an alternative example, the cryogenic antifreeze in the energy storage device flows to the heat exchange device through the second circulation loop and then flows back to the energy storage device through the second circulation loop.

[0007] As an alternative example, the energy storage device includes an insulated liquid storage tank, which is made of double-walled stainless steel.

[0008] As an alternative example, the aforementioned insulated storage tank is filled with an insulation layer made of polyurethane foam material with a thickness of 50 mm to 100 mm.

[0009] As an alternative example, the aforementioned insulated liquid storage tank is equipped with a stirrer.

[0010] As an alternative example, the aforementioned insulated liquid storage tank is equipped with a liquid level sensor and an automatic liquid replenisher, both of which are electrically connected to the aforementioned control device.

[0011] As an optional example, the above-mentioned insulated liquid storage tank is equipped with a temperature sensor, which is electrically connected to the above-mentioned control device.

[0012] As an optional example, the heat exchange device described above includes at least one heat exchanger.

[0013] Secondly, this application provides a refrigeration energy storage system, including the aforementioned refrigeration energy storage device.

[0014] Thirdly, this application provides a cooling energy storage method, comprising: obtaining the temperature of antifreeze in an energy storage device, and when the temperature is greater than a first threshold, or the temperature is greater than a second threshold and the current time point is a low electricity price period, starting a first circulation pump and a cooling device to open a first circulation loop, wherein the antifreeze in the energy storage device flows to the cooling device through the first circulation loop, the cooling device cools the antifreeze, and after cooling is completed, the antifreeze flows back to the energy storage device through the first circulation loop, wherein the first threshold is greater than the second threshold; when a target load is detected to require cooling, starting a second circulation pump to open a second circulation loop, wherein the antifreeze in the energy storage device flows to a heat exchange device through the second circulation loop, the heat exchange device cools the target load through the antifreeze, and after cooling is completed, the antifreeze flows back to the energy storage device through the second circulation loop.

[0015] As an optional example, after starting the first circulation pump, the method further includes: when the current time point is during the low electricity price period and the temperature is less than the third threshold, shutting down the first circulation pump and the refrigeration device to close the first circulation loop, wherein the third threshold is less than the second threshold.

[0016] As an optional example, after starting the first circulation pump, the method further includes: when the current time point is a high electricity price period and the temperature is below the fourth threshold, shutting down the first circulation pump and the refrigeration device to close the first circulation loop, wherein the fourth threshold is less than the second threshold and greater than the third threshold.

[0017] As an optional example, the above method further includes: obtaining the level of antifreeze in the energy storage device; and when the level is lower than a fifth threshold, activating an automatic replenisher to add antifreeze to the energy storage device.

[0018] Fourthly, this application provides a storage medium storing a computer program, wherein the computer program is executed by a processor to perform the above-described cooling energy storage method.

[0019] The technical solutions provided in this application have the following advantages compared with the prior art:

[0020] This application employs a refrigeration energy storage device comprising an energy storage device, a refrigeration device, a heat exchange device, and a control device. A first circulation loop is provided between the refrigeration device and the energy storage device, and a first circulation pump is installed in the first circulation loop. A second circulation loop is provided between the energy storage device and the heat exchange device, and a second circulation pump is installed in the second circulation loop. The control device is electrically connected to the energy storage device, the refrigeration device, the heat exchange device, the first circulation pump, and the second circulation pump. In this refrigeration energy storage device, the energy storage device stores low-temperature antifreeze generated by the refrigeration device and high-temperature antifreeze generated by the heat exchange device, thus temporarily storing cold energy. The heat exchange device transfers the cold energy from the energy storage device... The cold energy is transferred to the actual load, realizing the release of cold energy. The antifreeze, after absorbing heat, flows back to the storage tank, completing the cold energy recycling. The control device monitors the temperature and level of the antifreeze in the energy storage device, as well as the operating status of the refrigeration unit, circulation pump, and other equipment in real time. According to the set temperature threshold and time program, it automatically controls the start and stop of the refrigeration unit and the flow rate adjustment of the circulation pump to realize the intelligent operation of the system. This enables cooling at night with low electricity prices and releasing cold energy for the load during the day, reducing the overall operating cost, improving the efficiency of cold energy transfer, and reducing energy loss. In turn, it solves the technical problems of low efficiency, high cost, narrow applicability, and difficulty in effectively utilizing low-priced electricity to meet the demand during high-priced electricity periods. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1This is a schematic diagram of the structure of an optional refrigeration energy storage device according to an embodiment of this application;

[0025] Figure 2 This is a flowchart of an optional cooling energy storage method according to an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0028] According to a first aspect of the embodiments of this application, a refrigeration energy storage device is provided, optionally, such as Figure 1 As shown, the above-mentioned refrigeration energy storage device includes:

[0029] Energy storage device 102, refrigeration device 104, heat exchange device 106, and control device 108;

[0030] A first circulation loop is provided between the refrigeration device 104 and the energy storage device 102, and a first circulation pump 110 is provided on the first circulation loop;

[0031] A second circulation loop is provided between the energy storage device 102 and the heat exchange device 106, and a second circulation pump 112 is provided on the second circulation loop;

[0032] The control device 108 is electrically connected to the energy storage device 102, the refrigeration device 104, the heat exchange device 106, the first circulating pump 110, and the second circulating pump 112.

[0033] As an alternative example, the antifreeze in the energy storage device flows to the refrigeration device through a first circulation loop and then flows back to the energy storage device through the first circulation loop.

[0034] As an alternative example, the antifreeze in the energy storage device flows to the heat exchange device through a second circulation loop and then flows back to the energy storage device through the second circulation loop.

[0035] Optionally, in this embodiment, the refrigeration energy storage device is a system combining cold energy storage and reuse, designed to realize the conversion and utilization of electrical energy at different times. It consists of an energy storage device, a refrigeration device, a heat exchange device, and a control device. The energy storage device is used to store the low-temperature antifreeze generated by the refrigeration device and the high-temperature antifreeze generated by the heat exchange device, realizing the temporary storage of cold energy. The refrigeration device is responsible for operating during the nighttime low electricity price period. It adopts the principle of compression refrigeration and can use environmentally friendly refrigerants such as R410A (a non-azeotropic mixture, mainly composed of difluoromethane and pentafluoroethane in a certain proportion) as working fluid. Through a series of processes such as compression, condensation, throttling, and evaporation of the refrigerant by the compressor, the antifreeze is cooled to -25°C to -30°C. The heat exchange device is used to transfer the cold energy from the energy storage device to the actual load (fermentation tank or heat exchanger, such as the fan coil heat exchanger used in indoor air conditioning systems) when cooling is required during the day, thus releasing the cold energy. In the heat exchange device, the low-temperature antifreeze exchanges heat with indoor air or circulating water. After absorbing heat, the antifreeze flows back to the storage tank, completing the recycling of cold energy. The control device is used for intelligent control and is electrically connected to the core components of the entire equipment (energy storage device, refrigeration device, heat exchange device, and two sets of circulating pumps). It uses a programmable logic controller to monitor the temperature and level of the antifreeze in the energy storage device, as well as the operating status of the refrigeration device, circulating pumps, and other equipment in real time. According to the set temperature threshold and time program, it automatically controls the start and stop of the refrigeration device and the flow rate adjustment of the circulating pumps to achieve intelligent system operation. The first circulation loop and the first circulating pump form a closed loop path between the refrigeration device and the energy storage device. Through the first circulating pump, the low-temperature antifreeze generated by the refrigeration device is transported to the energy storage device for cold energy storage. The high-temperature antifreeze in the energy storage device, after absorbing heat, returns to the refrigeration device for cooling. The second circulation loop and the second circulation pump form a closed circulation path between the energy storage device and the heat exchange device. Through the second circulation pump, the low-temperature antifreeze in the energy storage device flows to the heat exchange device to cool the target load; the high-temperature antifreeze after absorbing heat returns to the energy storage device to wait for the next round of cooling.

[0036] Optionally, in this embodiment, the operation process of the cooling energy storage device is as follows: During the nighttime low electricity price period, the control device starts the cooling unit and the first circulation pump to generate low-temperature antifreeze and transport it to the energy storage device through the first circulation loop to complete the storage of cold energy. During the daytime high electricity price period, the cooling unit stops operating, and the control device starts the second circulation pump, causing the low-temperature antifreeze in the energy storage device to flow to the heat exchange device to cool the actual load. The used high-temperature antifreeze flows back to the energy storage device. The control device can intelligently control the opening or closing of each device according to time, electricity price, ambient temperature, and load conditions to achieve energy-saving operation. When the temperature of the antifreeze in the energy storage device rises to the set upper limit, if it is during the nighttime low electricity price period, the control device starts the cooling unit to cool again; if it is during the daytime high electricity price period, the control device prioritizes the use of the remaining cold energy according to a preset strategy, and if insufficient, determines whether to start the cooling unit to supplement the cold energy based on cost. By utilizing the peak-valley electricity price difference, cooling and energy storage are carried out at night when the electricity price is low, and the operating time of the cooling unit is reduced during the daytime high electricity price period, significantly reducing electricity costs. The high specific heat capacity of antifreeze allows it to store a large amount of cold energy, and the energy storage device ensures stable storage and efficient utilization of the cold energy. Refrigeration energy storage equipment can operate stably, unaffected by daytime power supply fluctuations, and can be widely used in commercial buildings, industrial plants, data centers, and other locations where cooling stability and cost control are required.

[0037] Optionally, in this embodiment, the cooling energy storage device utilizes low electricity prices at night for cooling and releases cooling capacity to supply the load during the day, effectively responding to peak-valley electricity pricing policies and reducing overall operating costs. The dual-loop system of the cooling energy storage device optimizes the cooling and supply paths respectively, improving cooling capacity transfer efficiency and reducing energy loss. The cooling energy storage device intelligently schedules equipment operation through a control device, adapting to various operating conditions and load demands, and is suitable for various scenarios such as commercial buildings and industrial cooling. The cooling energy storage device does not require the cooling equipment to be started during the day, reducing equipment operating time and maintenance costs, and extending equipment lifespan. The circulating pumps of the cooling energy storage device operate independently, with stable segmented operation, avoiding efficiency reduction caused by the mixing of hot and cold liquids.

[0038] As an alternative example, the energy storage device includes an insulated liquid storage tank, which is constructed of double-walled stainless steel.

[0039] Optionally, in this embodiment, the core component of the energy storage device is an insulated storage tank, used to store low-temperature antifreeze (such as chilled water, ethylene glycol solution, etc.) provided by the refrigeration unit, realizing the storage and subsequent release of cold energy. The insulated storage tank is made of double-layer stainless steel. The inner stainless steel layer is in direct contact with the antifreeze, has good corrosion resistance and strength, and ensures that no leakage or corrosion will occur during long-term use. The outer stainless steel layer enhances the stability of the overall structure and provides additional physical protection.

[0040] As an alternative example, the insulated storage tank is filled with an insulation layer made of polyurethane foam material with a thickness of 50 mm to 100 mm.

[0041] Optionally, in this embodiment, the insulated storage tank is filled with an insulation layer made of polyurethane foam, which has an extremely low thermal conductivity and is a highly efficient insulation material. The thickness of the insulation layer is set between 50 mm and 100 mm, and can be selected according to the specific usage environment and insulation requirements to ensure good insulation performance and reduce cold loss. The insulated storage tank includes a multi-layer structure, consisting of an inner liner, an insulation layer, and an outer shell from the inside out. The inner liner is made of food-grade or industrial-grade stainless steel and is in direct contact with the antifreeze. The insulation layer is filled with polyurethane foam and is tightly fitted to the inner liner to provide heat insulation. The outer shell is made of stainless steel or corrosion-resistant coated steel plate, which serves to protect and reinforce the structure.

[0042] As an alternative example, an agitator is installed inside the insulated liquid storage tank.

[0043] Optionally, in this embodiment, an agitator (which can be a propeller agitator) is installed inside the heat-insulating storage tank to continuously or intermittently agitate the antifreeze in the tank, thereby improving the thermal uniformity and heat exchange efficiency of the antifreeze, preventing temperature stratification of the antifreeze, and ensuring uniform and stable energy storage. The agitator is started and stopped by a control device, and the automatic cyclic agitation time or temperature linkage can be set.

[0044] As an alternative example, the insulated storage tank is equipped with a level sensor and an automatic replenisher, both of which are electrically connected to the control device.

[0045] Optionally, in this embodiment, a liquid level sensor and an automatic replenisher are installed inside the insulated storage tank. The liquid level sensor monitors the antifreeze level in real time, and the data collected by the sensor is sent to the control device via an electrical connection. The automatic replenisher is connected to an external antifreeze supply system, receives replenishment commands from the control device, and automatically adds liquid according to the liquid level sensor signal. The replenishment port is located in the upper middle part of the insulated storage tank, and a check valve is used to prevent backflow. The control device receives the liquid level sensor signal and determines whether the liquid level is low. If the liquid level is lower than a set threshold, the control device automatically drives the replenisher to add liquid. Functions such as high liquid level warning, low liquid level alarm, and anti-dry operation protection can be set.

[0046] As an alternative example, a temperature sensor is installed inside the insulated liquid storage tank, and the temperature sensor is electrically connected to the control device.

[0047] Optionally, in this embodiment, a temperature sensor is installed inside the insulated storage tank to monitor the temperature of the antifreeze in the tank in real time. The sensor can be installed in the middle of the tank or near the main heat exchange area of ​​the liquid to ensure the representativeness of the temperature data. It is electrically connected to a control device to achieve real-time data transmission and feedback. Based on the temperature sensor data, the control device can determine the current energy storage status (e.g., whether cryogenic energy storage has been completed), control the start / stop of the refrigeration unit, and control the start / stop of the stirrer or circulating pump, thereby achieving functions such as temperature range adjustment, upper and lower limit alarms, and linkage control.

[0048] As an optional example, the heat exchange device includes at least one heat exchanger.

[0049] Optionally, in this embodiment, the heat exchanger is the core component used to transfer heat. Its function is to exchange the heat of the antifreeze in the storage tank with the target load (such as an external cooling system or environment). It can be a plate heat exchanger, a shell and tube heat exchanger, a spiral heat exchanger, etc.

[0050] It should be noted that, for the sake of simplicity, the aforementioned embodiments of refrigeration and energy storage devices are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0051] According to a second aspect of the embodiments of this application, a refrigeration energy storage system is also provided, including the above-mentioned refrigeration energy storage device.

[0052] For other examples of this embodiment, please refer to the examples above, which will not be repeated here.

[0053] According to a third aspect of the embodiments of this application, a refrigeration energy storage method is also provided, applied to a refrigeration energy storage device, optionally, as... Figure 2 As shown, the above method includes:

[0054] S202, obtain the temperature of the antifreeze in the energy storage device, and when the temperature is greater than the first threshold, or the temperature is greater than the second threshold and the current time point is a low electricity price period, start the first circulation pump and the cooling device to open the first circulation loop. The antifreeze in the energy storage device flows to the cooling device through the first circulation loop. The cooling device cools the antifreeze. After the cooling is completed, the antifreeze flows back to the energy storage device through the first circulation loop. The first threshold is greater than the second threshold.

[0055] S204 When the target load is detected to need cooling, the second circulation pump is started to open the second circulation loop. The antifreeze in the energy storage device flows to the heat exchange device through the second circulation loop. The heat exchange device cools the target load through the antifreeze. After the cooling is completed, the antifreeze flows back to the energy storage device through the second circulation loop.

[0056] Optionally, in this embodiment, the control device of the cooling energy storage device obtains the real-time temperature of the antifreeze in the energy storage device through a temperature sensor installed inside the energy storage device. Cooling can be initiated when either of the following conditions is met: Condition 1: The antifreeze temperature is greater than a first threshold (e.g., 18°C); Condition 2: The antifreeze temperature is greater than a second threshold (e.g., 10°C) and the current time is during a low electricity price period (e.g., nighttime). The first threshold is greater than the second threshold to reflect the flexibility of temperature control and energy-saving priority, meaning that cooling is preferentially initiated during low electricity price periods. When one of the above conditions is met, the control device starts the first circulation pump and the cooling device, opening the first circulation loop. The antifreeze flows into the cooling device through the first circulation loop, completes the cooling process, and then flows back to the energy storage device, achieving pre-storage of cold energy to prepare for peak daytime energy consumption. When the control device detects that the target load (such as air conditioning system, equipment, etc.) needs to be cooled, it starts the second circulation pump and opens the second circulation loop. The coolant in the energy storage device flows to the heat exchange device through the second circulation loop. The heat exchange device uses the temperature difference of the coolant to cool the target load. The high-temperature coolant after heat exchange returns to the energy storage device, forming a closed loop.

[0057] Optionally, in this embodiment, cold storage is carried out during periods of low electricity prices to significantly reduce energy costs. Dynamic temperature control combined with time-based judgment enables intelligent and strategic cooling startup. The cold and heat flow return closed-loop system improves system operational stability and thermal efficiency.

[0058] As an optional example, after starting the first circulation pump, the above method also includes:

[0059] When the current time is a period of low electricity price and the temperature is less than the third threshold, the first circulation pump and the refrigeration unit are shut down to close the first circulation loop, wherein the third threshold is less than the second threshold.

[0060] Optionally, in this embodiment, a low-temperature shutdown mechanism is further introduced based on the energy storage pre-cooling logic to prevent over-cooling and resource waste. Specifically, if the current time is still during a low-electricity-price period (e.g., nighttime), and the antifreeze temperature in the energy storage device is below a third threshold (e.g., -25°C), where the third threshold is less than the second threshold, it is used to control the minimum temperature limit and prevent excessive cooling. After recognizing the above conditions, the control device actively shuts down the first circulation pump and the cooling device, thereby closing the first circulation loop and terminating the cooling process. By setting the low-temperature shut-off control logic, excessive cooling of the antifreeze during the cold storage process is avoided, further improving the energy efficiency and safety of the refrigeration energy storage system.

[0061] As an optional example, after starting the first circulation pump, the above method also includes:

[0062] When the current time is a period of high electricity price and the temperature is below the fourth threshold, the first circulation pump and the refrigeration unit are shut down to close the first circulation loop, wherein the fourth threshold is less than the second threshold and greater than the third threshold.

[0063] Optionally, in this embodiment, after starting the first circulation pump, a temperature control shutdown mechanism is further implemented during high electricity price periods to prevent ineffective cooling and energy storage activities within unsuitable economic time windows. Specifically, when the current time is during a high electricity price period (e.g., daytime), and the temperature of the antifreeze in the energy storage device is already below a fourth threshold (e.g., -10°C), where the fourth threshold is set between the second and third thresholds to serve as a compromise between economy and energy efficiency, the control device shuts down the first circulation pump and the cooling device, thereby closing the first circulation loop and preventing continued energy consumption for cooling operations during high electricity price periods. By setting an intermediate temperature control threshold during high electricity price periods, intelligent shutdown of the first cycle is achieved, further improving the economy and control accuracy of the cooling and energy storage system.

[0064] As an optional example, the above method also includes:

[0065] Obtain the level of antifreeze in the energy storage device;

[0066] When the liquid level falls below the fifth threshold, the automatic liquid replenisher is activated to add antifreeze to the energy storage device.

[0067] Optionally, in this embodiment, a liquid level monitoring and automatic liquid replenishment mechanism is further introduced to ensure continuous and stable system operation. Specifically, the control device connects to a liquid level sensor to obtain the real-time liquid level information of the antifreeze in the energy storage device. If the detected liquid level is lower than a fifth threshold (which can be set according to the minimum operating liquid level of the equipment), it is determined that there may be liquid evaporation, leakage, or increased usage in the current system. The control device then activates the automatic liquid replenisher to automatically replenish the antifreeze in the energy storage device, restoring it to the set liquid level range, thus ensuring the normal circulation operation of the refrigeration energy storage circuit. Through liquid level monitoring and automatic liquid replenishment control, dynamic replenishment of antifreeze in the energy storage device is achieved, ensuring stable system operation and improving the level of intelligence.

[0068] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, wherein a computer program is stored in the computer program, which is executed by a processor to perform the steps in the above-described cooling energy storage method.

[0069] Optionally, in this embodiment, those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing the hardware related to the terminal device. The program can be stored in a computer-readable storage medium, which may include: flash drive, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0070] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0071] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0072] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0074] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0075] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0076] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A refrigeration energy storage apparatus, characterized by, The refrigeration energy storage device comprises an energy storage device, a refrigeration device, a heat exchange device, and a control device. A first circulation loop is arranged between the energy storage device and the refrigeration device, and a first circulation pump is arranged on the first circulation loop. A second circulation loop is arranged between the energy storage device and the heat exchange device, and a second circulation pump is arranged on the second circulation loop. The control device is electrically connected with the energy storage device, the refrigeration device, the heat exchange device, the first circulation pump, and the second circulation pump.

2. The refrigeration energy storage device of claim 1, wherein, The anti-freezing solution in the energy storage device flows to the refrigeration device through the first circulation loop, and flows back to the energy storage device through the first circulation loop.

3. The refrigeration energy storage apparatus of claim 1, wherein, The anti-freezing solution in the energy storage device flows to the heat exchange device through the second circulation loop, and flows back to the energy storage device through the second circulation loop.

4. The refrigeration energy storage apparatus of claim 1, wherein, The energy storage device comprises an insulation liquid storage tank, which is composed of double-layer stainless steel material.

5. The refrigeration energy storage apparatus of claim 4, wherein, The insulation liquid storage tank is filled with an insulation layer, which is composed of polyurethane foam material and has a thickness of 50-100 mm.

6. The refrigeration energy storage apparatus of claim 4, wherein, The insulation liquid storage tank is provided with a stirrer.

7. The refrigeration energy storage apparatus of claim 4, wherein, The insulation liquid storage tank is provided with a liquid level sensor and an automatic liquid supplement device, both of which are electrically connected with the control device.

8. The refrigeration energy storage apparatus of claim 4, wherein, The insulation liquid storage tank is provided with a temperature sensor, which is electrically connected with the control device.

9. The refrigeration energy storage apparatus of claim 1, wherein, The heat exchange device comprises at least one heat exchanger.

10. A refrigeration energy storage system characterized by, The refrigeration energy storage device according to any one of claims 1-9.

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