Energy-saving control method and device for refrigeration house

Abstract

The invention relates to the technical field of refrigeration houses, in particular to an energy-saving control method for a refrigeration house, which comprises the following steps: S1, determining the number of cold storage plates: uniformly distributing a plurality of groups of cold storage plates at the top of the refrigeration house according to different temperatures required by different products and the space size of the refrigeration house, and filling the cold storage plates with a cold storage agent; s2, the cold storage time of the cold storage plates is calculated, specifically, the cold machine is started to charge the cold storage plates, and the time needed for form change of the cold storage plate farthest from the cold machine is calculated; s3, acquiring the temperature T0 of a temperature sensor near the refrigerator at the moment when the form of the cold storage plate at the farthest end from the refrigerator in the step S2 is changed; s4, starting and stopping the cold machine: setting the closing temperature of the cold machine to be T1, and enabling T1 to be 1lt; and the starting temperature of the refrigerator is set to be T2, the temperature of the temperature sensor is obtained in real time through the APC control system, when the temperature of the temperature sensor reaches T2, the refrigerator is started, and when the temperature of the temperature sensor reaches T1, the refrigerator is closed.

Description

Technical Field

[0001] The present invention relates to the technical field of cold storage, and particularly to an energy-saving control method and device for a cold storage. Background Art

[0002] Existing cold storages have many energy consumption problems during operation, resulting in serious energy waste.

[0003] On the one hand, when a traditional cold storage detects that the temperature inside the cold storage is not within the preset range, it will start the refrigerating machine to cool down the cold storage. However, it is impossible to determine the starting time of the refrigerating machine. When it is at the peak and flat values of the electricity bill, it will increase the power consumption.

[0004] On the other hand, the uneven temperature distribution inside the cold storage is also a major problem. In existing cold storages, there is often a phenomenon that the temperature is low at the top and high at the bottom. Although heat exchange occurs naturally and evenly, the process is slow and it is difficult to quickly reach an ideal state of uniform temperature. This situation not only affects the quality of stored items but also causes the refrigerating machine to run for a longer time to maintain the overall temperature, further resulting in energy waste.

[0005] In addition, existing cold storages also have deficiencies in heat preservation measures. The overall cold leakage phenomenon of cold storages is relatively common. For example, due to opening the door or other operations, the temperature inside the cold storage gradually rises, and there is a lack of effective heat preservation means to reduce the leakage of cold sources, so that the refrigerating machine needs to be started frequently to maintain the set temperature, increasing the energy consumption.

[0006] At the same time, the existing cold storages do not utilize cold sources efficiently enough. They do not make full use of the valley electricity price period for cold storage operation, and the running time of the refrigerating machine is not effectively controlled, resulting in a high electricity cost.

[0007] Therefore, the present application has developed an energy-saving control method and device for a cold storage to solve the problems existing in the prior art. Summary of the Invention

[0008] The object of the present invention is to provide an energy-saving control method and device for a cold storage to solve the problem of excessive energy consumption in the prior art during the use of cold storages.

[0009] The technical solution of the present invention is: An energy-saving control method for a cold storage includes the following steps:

[0010] S1: Determine the number of cold storage plates: According to the different temperatures required for different products and the size of the cold storage space, multiple groups of cold storage plates are evenly distributed on the top of the cold storage, and a cold storage agent is filled in the cold storage plates;

[0011] S2: Calculate the cold storage time of the cold storage plates: Start the refrigerating machine to charge the cold storage plates, and calculate the time required for the morphological change of the cold storage plate farthest from the refrigerating machine;

[0012] S3: Collect the temperature of the temperature sensor: When collecting the morphological change of the cold storage panel at the farthest end from the chiller in step S2, collect the temperature T0 of the temperature sensor near the chiller at this time.

[0013] S4: Start and stop the chiller: Set the chiller shutdown temperature as T1, and make T1 < T0. Set the chiller startup temperature as T2. Obtain the temperature of the temperature sensor in real time through the APC control system. When the temperature of the temperature sensor reaches T2, start the chiller. When the temperature of the temperature sensor reaches T1, stop the chiller. And through the APC control system, make the startup time of the motor be at the valley value of the electricity charge. At the peak and flat values of the electricity charge, release the cold quantity through the cold storage panel to maintain the temperature in the cold storage.

[0014] Preferably, the APC control system includes an electricity settlement system for recording and settling the power consumption in each period; a chiller control system for controlling the startup and stop of the chiller; an energy management system communicatively connected to the electricity settlement system and the chiller control system. The energy management system aggregates the energy consumption data in each period in the electricity settlement system, generates control instructions to control the startup and stop of the chiller control system, so as to realize the charging of the cold storage panel.

[0015] Preferably, the temperature sensor is located in the other direction opposite to the blowing direction of the chiller, that is, on the back of the chiller.

[0016] An energy-saving device for a cold storage is controlled by using the energy-saving control method for a cold storage according to any one of claims 1-3, and includes:

[0017] A bearing frame is located in the cold storage. There are bearing rods arranged regularly on the bearing frame. The bearing rods divide the top area of the bearing frame into several independent installation areas at equal intervals.

[0018] Multiple installation rods are respectively installed on the corresponding bearing rods.

[0019] A heat-insulating layer is arranged on the inner wall of the cold storage.

[0020] Cold storage modules. Multiple cold storage modules are all located between two adjacent installation rods and are distributed in the installation areas. And two fixing rods are inserted into the cold storage modules, and the cold storage modules are detachably installed on the installation rods through the fixing rods. The cold storage modules absorb the cold quantity of the chiller at the valley value of the electricity charge and release the cold quantity at the peak or flat value of the electricity charge, so as to reduce the electricity charge of the cold storage.

[0021] Preferably, the cold storage module includes multiple cold storage panels. The cold storage panels have liquid inlets and are sealed by welding. The multiple cold storage panels are evenly distributed at intervals along the direction perpendicular to the installation rods and are inclined, so that the liquid inlets do not contact the cold storage agent in the cold storage panels.

[0022] Preferably, a plurality of first sets of mounting holes and second sets of mounting holes are sequentially distributed along the length direction of the mounting rod. The first sets of mounting holes and the second sets of mounting holes are arranged at intervals. Each first set of mounting holes includes two first mounting holes, and each second set of mounting holes includes two second mounting holes. The two fixing rods are respectively installed in two adjacent first mounting holes and second mounting holes.

[0023] Preferably, the first mounting hole has a sliding part and a mounting part. The sliding part accommodates the end of the fixing rod, and the mounting part penetrates through the top of the mounting rod and communicates with the sliding part to provide a channel for the fixing rod to be installed in the sliding part. The second mounting hole is U-shaped, and the distance between one end of the sliding part close to the second mounting hole and the second mounting hole is equal to the distance between the two fixing rods.

[0024] Preferably, grooves and protrusions are respectively and uniformly distributed on two surfaces of the cold storage plate.

[0025] Preferably, a plurality of limiting plates are sleeved on the fixing rod. Spacing is provided between two adjacent limiting plates to form a limiting groove. An annular protrusion matching the limiting groove is formed on the inner wall of the cold storage plate at the position where the fixing rod is inserted, so that the distances between a plurality of cold storage plates are equal.

[0026] Preferably, two fixing blocks are further provided on the fixing rod. The two fixing blocks are respectively clamped on the fixing rod and respectively abut against the two cold storage plates at the farthest ends. Threaded connection plates are respectively arranged at two ends of the fixing rod and respectively abut against one side of the corresponding mounting rod stack.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] (1) Start the chiller during the valley period of electricity charges, and utilize the low electricity price advantage to reduce the operation cost; during the peak and flat periods of electricity charges, rely on the cold storage plate to release cold to maintain the stable temperature of the cold storage, and utilize the low valley electricity to charge the cold storage material and release cold during the peak electricity period to achieve the purpose of energy conservation and consumption reduction;

[0029] (2) The cold storage plates are arranged in a uniformly distributed manner, so that the cold can be evenly released around the object to be cooled, avoiding local temperature fluctuations, and are inclined to prevent the leakage of the cold storage agent;

[0030] (3) A heat insulation layer is provided on the inner wall of the cold storage, which significantly slows down the leakage of cold, reduces the energy consumption of the chiller, and increases the duration of the cold storage plate;

[0031] (4) The surface of the cold storage plate is designed with grooves and protrusions to increase the actual contact area between the cold storage plate and the surrounding air, improve the heat exchange efficiency, and enable the cold storage plate to absorb or release cold more quickly and evenly.

[0032] (5) The cold storage module is installed on the installation rod in a detachable manner, enabling the cold storage module to be flexibly installed or disassembled as needed to adapt to different application scenarios and requirements. At the same time, when cleaning, inspection, or replacement is required, the cold storage module can be more easily disassembled for processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the drawings and embodiments:

[0034] Figure 1 It is a flowchart of an energy-saving control method for a cold storage according to the present invention;

[0035] Figure 2 It is a schematic structural diagram of an energy-saving device for a cold storage according to the present invention;

[0036] Figure 3 It is a schematic structural diagram of the cold storage module installed on the installation rod according to the present invention;

[0037] Figure 4 It is a schematic structural diagram of the cold storage module according to the present invention;

[0038] Figure 5 It is a side cross-sectional view of a cold storage with uniform cooling according to the present invention;

[0039] Figure 6 It is Figure 5 an enlarged schematic view of A in

[0040] Figure 7 It is a schematic structural diagram of the carrier frame according to the present invention;

[0041] Figure 8 It is Figure 7 an enlarged schematic view of B in

[0042] Wherein: 1. Carrier frame; 11. Carrier rod; 12. Installation area; 2. Installation rod; 3. Cold storage module; 31. Cold storage plate; 32. Liquid inlet; 4. Fixed rod; 5. First set of installation holes; 51. First installation hole; 511. Sliding part; 512. Installation part; 6. Second set of installation holes; 61. Second installation hole; 7. Groove; 71. Protrusion; 8. Limiting plate; 81. Limiting groove; 82. Annular protrusion; 9. Fixed block; 10. Abutting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The following will further elaborate on the content of the present invention in conjunction with specific embodiments:

[0044] As shown Figure 1 in the figure, an energy-saving control method for a cold storage includes the following steps;

[0045] S1: Determine the number of cold storage plates 31: According to the different temperatures required for different products and the size of the cold storage, the cold storage plates 31 need to be evenly arranged in a grid pattern on the top of the cold storage to ensure that the cold energy can be evenly radiated to each area of the cold storage, avoiding local overheating or overcooling.

[0046] S2: Calculate the cold storage time of the cold storage plates 31: Start the chiller to charge the cold storage plates 31. During the charging process, the cold storage agent in the cold storage plates 31 will gradually absorb the cold energy and undergo a morphological change (such as the phase change process of the phase change material). Record the cold storage plate 31 at the farthest end from the chiller, and the time required for its morphological change reflects the longest time required for the cold storage plate 31 to obtain sufficient cold energy from the chiller, which is also the time for all the cold storage plates 31 to complete the charging.

[0047] Specifically, the phase change material is a material that can undergo a phase change in a low-temperature environment, thereby releasing latent heat to store a large amount of cold source. When the ambient temperature is higher than the phase change temperature, the phase change material will actively absorb the surrounding heat to maintain the ambient temperature within a certain temperature range, thereby achieving energy exchange. In practical applications, using the characteristics of the phase change material, when the chiller is started, the phase change material absorbs the cold energy of the chiller, and when the chiller is turned off, the phase change material releases the cold energy to ensure that the temperature of the cold storage is within the suitable temperature range for the objects to be cooled during the peak and flat periods of the electricity bill.

[0048] S3: Collect the temperature of the temperature sensor: In step S2, when the cold storage plate 31 in the area farthest from the chiller undergoes a morphological transformation from liquid to solid, indicating that the cold storage process has reached a specific stage, the instantaneous temperature value measured by the temperature sensor installed on the back of the chiller needs to be collected and recorded as T0, which reflects the temperature reference level of the environment around the chiller when the cold storage plates 31 complete the charging (i.e., the cold storage process ends).

[0049] Since the temperature sensor is not arranged on the direct air outlet path of the chiller, but in a relatively hidden area on its back, when the chiller starts to perform the cooling operation, the air temperature along the air outlet path will decrease significantly, forming a low-temperature area extending from the air outlet to the far end. At the same time, the air flow on the back of the chiller is relatively slow, and the heat exchange is insufficient, resulting in a relatively high temperature in this area, and then forming a temperature cycle inside the cold storage. Therefore, when the temperature value displayed by the temperature sensor is T0, this indicates that the overall temperature inside the cold storage has dropped to a critical point, and this temperature is sufficient to cause all the cold storage plates 31 to complete their morphological change processes, that is, the cold storage task is fully completed.

[0050] S4: Starting and shutting down the chiller: Set the shutdown temperature threshold of the chiller to T1, and strictly ensure that T1 is less than T0. When the temperature near the chiller drops to T1, the chiller stops running. Since T1 < T0, before the chiller stops running, the temperature in the cold storage is already low enough to ensure that all the cold storage plates 31 complete the morphological change and achieve the cold storage target; when the temperature in the cold storage detected by the temperature sensor reaches T2, it indicates that the temperature in the cold storage begins to show an upward trend. At this time, the APC control system will trigger the chiller start command to make the chiller resume refrigeration operation to maintain the low-temperature environment in the cold storage.

[0051] With the help of the APC control system, accurately plan and reasonably arrange the start time of the chiller motor to ensure that its start time is during the valley period of electricity charges. Starting the chiller during the valley period of electricity charges can make full use of the advantage of low electricity prices during this period to cool the cold storage plates 31, effectively reduce the operating cost of the chiller, and improve the economic efficiency of energy use; during the peak and flat periods of electricity charges, in order to further reduce energy consumption and operating costs, mainly rely on the cold storage plates 31 to release cold to maintain the temperature stability in the cold storage, and the cold storage plates 31 have stored a large amount of cold during the previous charging process. These stored cold can meet the refrigeration requirements of the cold storage for a period of time, thus reducing the dependence on the chiller. Through this method, not only is energy consumption reduced, but also the high electricity charges incurred by using the chiller during the peak electricity period are reduced, achieving efficient energy use and effective cost control.

[0052] Specifically, the APC control system includes an electricity settlement system for recording and settling the power consumption in each period; a chiller control system for controlling the start and stop of the chiller; and a smart cold storage energy management system that is communicatively connected to the electricity settlement system and the chiller control system. The energy management system aggregates the energy consumption data in each period in the electricity settlement system and generates control instructions to control the start and stop of the chiller control system, thereby realizing the charging of the cold storage plates 31.

[0053] The smart cold storage energy management system, on the basis of standardized sub-item metering, collects various energy data through systems, processes, analyzes the energy data, realizes the visualization of the energy consumption process, and effectively controls the cold storage process, which means using phase change materials to autonomously change the physical state at a specific temperature, that is, solidification or melting, while realizing the storage and release of cold energy. At the same time, low-valley electricity or clean energy can be used to charge the material, and cold is released during peak electricity or when needed, achieving the purpose of energy conservation and consumption reduction.

[0054] In a cold storage, the APC control system monitors environmental parameters such as temperature and humidity in real time through sensors. These sensor data are transmitted to the APC controller and used as the basis for control decisions. The APC control system utilizes a pre-established mathematical model to predict the future trends of temperature and humidity changes in the cold storage based on the current environmental parameters and historical data. Based on the prediction results, the APC control system sends control commands to actuators such as refrigeration equipment and fans through a control network.

[0055] The actuators precisely adjust their operating states according to the commands to achieve precise control of the environmental parameters in the cold storage. The APC control system continuously monitors environmental parameters such as the temperature in the cold storage and compares them with the set values. If there is a deviation, the APC control system will immediately adjust the control strategy to ensure the stability and uniformity of the temperature in the cold storage. Moreover, according to the peak and valley periods of electricity charges, it optimizes the operating time of the refrigeration equipment. It starts the refrigeration equipment during the valley period of electricity charges to charge the cold storage board; during the peak period of electricity charges, it relies on the cold storage board to release cold to maintain the temperature of the cold storage, thereby reducing the energy consumption cost.

[0056] As Figures 2 - 4 shown, an energy-saving device for a cold storage includes a bearing frame 1, mounting rods 2, and cold storage modules 3; a bearing frame 1 is provided in the cold storage. A plurality of bearing rods 11 are arranged and configured on the bearing frame 1, and the plurality of bearing rods 11 are equally spaced, dividing the top area of the bearing frame 1 into a plurality of independent installation areas 12. Each installation area 12 is a rectangular or square space for the subsequent installation of the cold storage modules 3. Mounting rods 2 are installed on each bearing rod 11, and the mounting rods 2 extend along the length direction of the bearing rods 11 to provide support points for the fixation of the cold storage modules 3. A plurality of cold storage modules 3 are arranged in each installation area 12, and two fixing rods 4 are inserted. The cold storage modules 3 are detachably installed on the mounting rods 2 through the fixing rods 4. Each cold storage module 3 includes a plurality of cold storage plates 31. The cold storage plates 31 are evenly spaced along the direction perpendicular to the mounting rods 2, and a cold storage agent (such as a phase change material) is filled inside the cold storage plates 31. The cold storage agent releases cold through the phase change process. When the temperature in the cold storage is higher than the preset value, the cooling machine is started for cooling. At this time, the cold storage agent absorbs energy and stores it. When the temperature reaches below the preset value, the cooling machine is turned off. In this process, the cold storage agent has already stored enough energy. Therefore, the cold storage agent can release cold according to the external temperature, thereby ensuring that the temperature in the cold storage is always within a suitable temperature range.

[0057] In this embodiment, the cold storage plates 31 are arranged in a uniformly distributed manner, aiming to enable the cold quantity to be evenly released around the object to be cooled, avoiding the problems caused by relying solely on the blowing direction of the cold machine for cooling, that is, the temperature of the object close to the cold machine is too low, while the temperature of the object far from the cold machine is too high, and thus it is impossible to ensure that all objects are always maintained within an appropriate temperature range. At the same time, multiple cold storage plates 31 work together to form a continuous cold quantity coverage area, effectively preventing local temperature fluctuations, thereby significantly improving the overall cooling uniformity of the cold storage. In addition, the cold storage module 3 is installed on the installation rod 2 in a detachable manner, enabling the cold storage module 3 to be flexibly installed or removed according to needs, adapting to different application scenarios and requirements. At the same time, when cleaning, inspection, or replacement is required, the cold storage module 3 can be more easily removed for processing.

[0058] Furthermore, the cold storage plate 31 is designed with a liquid inlet 32, and a strict sealing treatment is implemented on the liquid inlet 32 using a welding process to ensure its sealing performance. And the cold storage plate 31 is stably installed on the fixed rod 4 in an inclined manner, ensuring a spatial isolation between the liquid inlet 32 and the cold storage agent stored inside the cold storage plate 31, thereby effectively preventing the leakage of the cold storage agent.

[0059] In traditional cold storage application scenarios, due to insufficient heat insulation performance, the temperature of the cold storage leaks too quickly, resulting in the cold machine needing to be frequently started to maintain the set temperature. This not only increases energy consumption but also affects the storage quality of the items inside the cold storage. Therefore, in this embodiment, an efficient heat insulation layer is added to the inner wall of the cold storage to significantly slow down the leakage of cold quantity and improve the overall heat insulation performance of the cold storage.

[0060] Specifically, the heat insulation layer uses a vacuum insulation panel (VIP) or a coated aerogel coating. The vacuum insulation panel (VIP) is used as the core heat insulation material and is firmly fixed on the inner wall of the cold storage by an anchoring method. The vacuum insulation panel is an advanced composite heat insulation material with a unique structure, consisting of three main parts: a packaging material, a core material, and a getter or adsorbent. In a vacuum state, the core material is tightly encapsulated with the getter or adsorbent using the packaging material to form a highly airtight structure. This design significantly improves the adiabatic performance of the material by minimizing the heat conductivity of the core material framework and maintaining a high vacuum inside the packaging material, making the influence of gas heat transfer almost negligible, effectively reducing the leakage of cold quantity, enabling the cold storage plate 31 to release cold quantity for a longer time, and reducing the energy consumption loss of cold machine startup.

[0061] Using aerogel coatings as thermal insulation materials, aerogel coatings have extremely low thermal conductivity. They contain a large number of nano-scale pore structures inside, and these pores can effectively block the transfer of heat, effectively isolating the internal and external temperatures. After applying aerogel coatings to the inner wall of the cold storage, the heat exchange between the inside and outside of the cold storage can be greatly reduced, and the loss of cold energy can be reduced, thereby improving the thermal insulation effect of the cold storage and effectively achieving energy-saving effects.

[0062] In this embodiment, as Figures 7 - 8 shown, along the length direction of the mounting rod 2, multiple groups of first mounting holes 5 and second mounting holes 6 are alternately arranged in sequence. The two groups of mounting holes are arranged at a fixed interval. The first group of mounting holes 5 includes two first mounting holes 51, and the second group of mounting holes 6 includes two second mounting holes 61. The first mounting hole 51 is composed of a sliding part 511 and a mounting part 512. The sliding part 511 is a grooved hole, and its width matches the diameter of the fixed rod 4, allowing the end of the fixed rod 4 to be embedded and axially slide along the sliding part 511. The mounting hole is a through hole vertically penetrating the top of the mounting rod 2, and its lower end communicates with the sliding part 511 to form a straight-through channel from the top of the mounting rod 2 to the sliding part 511. The second mounting hole 61 is a U-shaped opening groove, and its depth and width are adapted to the diameter of the fixed rod 4, allowing the fixed rod 4 to be inserted and clamped along the notch direction. In practical applications, the two fixed rods 4 are respectively embedded in adjacent first mounting holes 51 and second mounting holes 61. One end of the fixed rod 4 is inserted into the sliding part 511 through the mounting part 512, and the other end of the fixed rod 4 is inserted into the second mounting hole 61. The design of the sliding part 511 and the mounting part 512 facilitates the quick installation and disassembly of the cold storage module 3. When the fixed rod 4 is installed, the two fixed rods 4 are just embedded in the sliding part 511 and the second mounting hole 61, so that the cold storage module 3 will not move, preventing the cold storage module 3 from falling off due to vibration or impact during the operation of the cold storage.

[0063] To further improve the cold storage performance of the cold storage plate 31 and enhance the heat exchange efficiency, targeted structural designs are carried out on the two opposite surfaces of the cold storage plate 31: grooves 7 are evenly opened on one surface, and protrusions 71 are correspondingly arranged on the other side, ensuring that in the heat exchange process of the cold storage plate 31, its two surfaces can uniformly participate in the heat exchange, avoiding local overheating or overcooling phenomena.

[0064] Specifically, the cross-sectional shapes of the grooves 7 and the protrusions 71 can be flexibly designed according to actual needs, including but not limited to various forms such as polygons, rectangles, trapezoids, or semi-circles. This design not only increases the surface area of the cold storage plate 31, but more importantly, it significantly increases the actual contact area between the cold storage plate 31 and the surrounding air, thereby effectively improving the heat exchange efficiency and enabling the cold storage plate 31 to absorb or release cold energy more quickly and evenly.

[0065] As Figures 4 - 5As shown in the figure, in order to achieve precise positioning, uniform spacing arrangement, and stable installation of the cold storage plate 31 on the fixed rod 4, a plurality of annular limiting plates 8 are sleeved on the fixed rod 4. A limiting groove 81 is formed between two adjacent limiting plates 8. The width of the limiting groove 81 matches the width of the annular protrusion 82 formed on the inner wall of the cold storage plate 31. To ensure that when the cold storage plate 31 is inserted axially along the fixed rod 4, the annular protrusion 82 is accurately embedded in the limiting groove 81. Through the mechanical positioning of the limiting groove 81, all the cold storage plates 31 are arranged at equal intervals. However, the positions of the two outermost cold storage plates 31 cannot be restricted. Therefore, two fixing blocks 9 are installed on the fixed rod 4. The fixing blocks 9 are clamped on the fixed rod 4 and respectively abut against the end faces of the two outermost cold storage plates 31 to prevent the cold storage plates 31 from moving axially along the fixed rod 4. Further, abutting plates 10 are connected to both ends of the fixed rod 4 by threading. The outer diameter of the abutting plate 10 is larger than the diameters of the first mounting hole 51 and the second mounting hole 61, so that the abutting plate 10 is closely attached to the side surface of the mounting rod 2 to prevent the cold storage module 3 from moving axially along the fixed rod 4.

[0066] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. An energy-saving control method for a cold storage, characterized in that, It includes the following steps: S1: Determine the number of cold storage plates: According to the different temperatures required for different products and the size of the cold storage, multiple groups of cold storage plates (31) are evenly distributed on the top of the cold storage. The cold storage plates (31) are filled with a cold storage agent; S2: Calculate the cold storage time of the cold storage plates: Start the chiller to charge the cold storage plates (31), and calculate the time required for the morphological change of the cold storage plate (31) at the farthest end from the chiller; S3: Collect the temperature of the temperature sensor: When the cold storage plate at the farthest end from the chiller changes in morphology in step S2, collect the temperature T0 of the temperature sensor near the chiller at this time; S4: Start and stop the chiller: Set the chiller shutdown temperature to T1 and make T1 < T0, set the chiller startup temperature to T2, obtain the temperature of the temperature sensor in real time through the APC control system. When the temperature of the temperature sensor reaches T2, start the chiller, and when the temperature of the temperature sensor reaches T1, stop the chiller. Moreover, through the APC control system, make the startup time of the motor be at the valley value of the electricity cost. At the peak and flat values of the electricity cost, release the cold quantity through the cold storage plates (31) to maintain the temperature in the cold storage.

2. The energy-saving control method of a cold storage according to claim 1, characterized in that: The APC control system includes a power settlement system for recording and settling the power consumption in each period; a chiller control system for controlling the startup and stop of the chiller; an energy management system communicatively connected to the power settlement system and the chiller control system. The energy management system summarizes the energy consumption data in each period in the power settlement system and generates a control instruction to control the startup and stop of the chiller control system, so as to realize the charging of the cold storage plates (31).

3. The energy-saving control method of a cold storage according to claim 1, characterized in that: The temperature sensor is located in the other direction opposite to the blowing direction of the chiller, that is, on the back of the chiller.

4. An energy-saving device for a cold storage, which is controlled by the energy-saving control method for a cold storage according to any one of claims 1-3, characterized in that, It includes: A bearing frame (1) located inside the cold storage. Regularly arranged on the bearing frame (1) are bearing rods (11). The bearing rods (11) divide the top area of the bearing frame (1) into several independent installation areas (12) at equal intervals; Multiple installation rods (2) respectively installed on the corresponding bearing rods (11); A heat insulation layer provided on the inner wall of the cold storage; Cold storage modules (3). Multiple cold storage modules (3) are all located between two adjacent installation rods (2) and are distributed in the installation areas (12). And two fixing rods (4) are inserted into the cold storage modules (3), and the cold storage modules (3) are detachably installed on the installation rods (2) through the fixing rods (4). The cold storage modules (3) absorb the cold quantity of the chiller at the valley value of the electricity cost and release the cold quantity at the peak or flat value of the electricity cost, so as to reduce the electricity cost of the cold storage.

5. The energy-saving device for a cold storage according to claim 4, wherein: The cold storage module (3) includes multiple cold storage plates (31). The cold storage plates (31) have liquid inlets (32) and are sealed by welding. The multiple cold storage plates (31) are evenly distributed at intervals along the direction perpendicular to the installation rods (2) and are inclined, so that the liquid inlets (32) do not contact the cold storage agent in the cold storage plates (31).

6. An energy-saving device for a cold storage according to claim 4, characterized in that: A plurality of first group mounting holes (5) and second group mounting holes (6) are sequentially distributed along the length direction of the mounting rod (2). The first group mounting holes (5) and the second group mounting holes (6) are arranged at intervals. The first group mounting holes (5) include two first mounting holes (51), and the second group mounting holes (6) include two second mounting holes (61). The two fixing rods (4) are respectively mounted in two adjacent first mounting holes (51) and second mounting holes (61).

7. The energy-saving device for a cold storage according to claim 6, characterized in that: The first mounting hole (51) has a sliding part (511) and a mounting part (512). The sliding part (511) accommodates the end of the fixing rod (4). The mounting part (512) penetrates the top of the mounting rod (2) and communicates with the sliding part (511), providing a channel for the fixing rod (4) to be mounted in the sliding part (511). The second mounting hole (61) is U-shaped. The distance between the end of the sliding part (511) close to the second mounting hole (61) and the second mounting hole (61) is equal to the distance between the two fixing rods (4).

8. The energy-saving device for a cold storage according to claim 4, characterized in that: Grooves (7) and protrusions (71) are respectively and uniformly distributed on two surfaces of the cold storage plate (31).

9. The energy-saving device for a cold storage according to claim 4, characterized in that: A plurality of limiting plates (8) are sleeved on the fixing rod (4). Limiting grooves (81) are formed at intervals between two adjacent limiting plates (8). An annular protrusion (82) matching the limiting groove (81) is formed on the inner wall of the cold storage plate (31) at the insertion position of the fixing rod (4), so that the distances between a plurality of cold storage plates (31) are equal.

10. The energy-saving device for a cold storage according to claim 4, characterized in that: Two fixing blocks (9) are further provided on the fixing rod (4). The two fixing blocks (9) are respectively clamped on the fixing rod (4) and are respectively in abutment with the two cold storage plates (31) at the farthest ends. Abutting plates (10) are respectively threadedly connected to both ends of the fixing rod (4) and are respectively in abutment with one side of the corresponding mounting rod (2).

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