Intelligent regulation and control phase change cold storage device, energy-saving cold storage and intelligent regulation and control method thereof

Abstract

The present application relates to cold storage equipment technical field, specifically to a kind of intelligent control phase change cold storage equipment, energy-saving refrigeration house and its intelligent control method.Cold storage equipment includes several phase change cold storage modules and intelligent adjustment module, phase change cold storage module is all placed in the top of refrigeration house, several phase change cold storage modules are divided into fixed phase change cold storage module and movable phase change cold storage module, intelligent adjustment module includes processor, temperature sensing module and drive mechanism, drive mechanism is used to drive movable phase change cold storage module to move up and down in vertical direction.Energy-saving refrigeration house includes refrigerating unit, shelf and intelligent control phase change cold storage equipment.The present application is based on the existing fixed PCM technology, with "position adjustable + intelligent feedback" as core, in the night cold charging stage, according to temperature probe feedback signal, phase change cold storage module is lowered to the best cold charging position, the cold charging rate of phase change cold storage module is improved, and the efficient and intelligent operation of refrigeration house cold storage system is ensured.

Description

Technical Field

[0001] This invention relates to the field of cold storage equipment technology, specifically to an intelligent control phase change cold storage device, an energy-saving cold storage, and an intelligent control method thereof. Background Technology

[0002] Cold storage facilities are warehousing facilities that use artificial refrigeration to maintain the internal temperature below 0°C or between 0°C and 15°C for long-term storage of food, medicine, or chemical raw materials. Due to significant diurnal and seasonal fluctuations in heat load from the enclosure structure, goods handling, lighting, and equipment, cold storage facilities require cold storage systems to smooth out peak and off-peak periods, reduce refrigeration unit power consumption, and lower operating costs. Phase change energy storage modules (PCM modules) utilize the property of phase change materials to absorb or release latent heat during solid-liquid phase transitions, "storing" the cold energy during periods of low electricity prices at night or low outdoor temperatures, and "releasing" it during periods of high electricity prices or high loads during the day. This has become a common energy-saving technology for cold storage facilities.

[0003] Most publicly available technical solutions currently employ a "fixed installation" method: ice boxes or ice plates encapsulated with PCM are fixed to the top truss, side walls, or shelf layers of the cold storage facility using hangers and bolts. After installation, the spatial position of the PCM module remains unchanged throughout the entire operating cycle. For example, the cold storage facilities with phase change cold storage functions described in references 1 and 2.

[0004] Reference 1: Chinese patent document with publication number CN118463458A.

[0005] Reference 1 describes a cold storage facility employing top-mounted phase change cold storage and its operation control method. The facility includes a refrigeration unit, shelves, a phase change cold storage module, temperature sensors, and an intelligent control system. The top-mounted phase change cold storage module is located above the shelves, with its specific surface area increasing from near to far from the refrigeration unit. The temperature sensors are located inside the cold storage facility and electrically connected to the intelligent control system. The refrigeration unit is also electrically connected to the intelligent control system. The intelligent control system includes an electrically connected data acquisition module for acquiring data affecting refrigeration, a temperature prediction module for acquiring future temperature changes, and an intelligent control module for calculating the most economically optimal operating scheme. This method solves the problem of poor refrigeration and cold storage effects caused by unreasonable design of existing cold storage structures, effectively mitigating internal temperature fluctuations in the cold storage, reducing the start-up and shutdown frequency of the refrigeration equipment, and lowering the energy consumption and operating costs of the refrigeration system.

[0006] Reference 2: Chinese patent document with publication number CN218442915U.

[0007] Reference 2 describes an energy-saving cold storage facility, comprising refrigeration equipment and a cold storage module installed within the cold storage. The refrigeration equipment includes a refrigeration unit outside the cold storage and multiple fans connected to the refrigeration unit and installed inside the cold storage. The fans drive air circulation within the cold storage. The cold storage module is arranged parallel to the fan airflow direction. The cold storage module includes multiple spaced-apart ice boxes with sealed chambers, each filled with a phase change refrigerant. Multiple air guides are installed on the outer side of the ice boxes, extending laterally from at least one sidewall and gradually towards the bottom. Adjacent air guides form a flow channel for guiding cold air, or the air guides themselves serve as flow channels for guiding cold air. By installing a cold storage module aligned with the fan airflow direction, the energy-saving cold storage facility allows cold air to sink, rapidly creating a low-temperature environment within the cold storage. The cold storage module can also store excess cold energy, reducing electricity consumption and thus saving energy and reducing emissions.

[0008] The core common deficiency of the aforementioned fixed PCM modules lies in the "location-load" mismatch: the spatial position of the PCM modules cannot be adjusted in real time according to changes in day and night and local heat load (for example, cold air density changes with temperature, and cold air sinks during nighttime cold storage, resulting in low cold storage efficiency of high-level modules), thus restricting the cold storage efficiency. Summary of the Invention

[0009] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art and to provide an intelligent control phase change cold storage device, an energy-saving cold storage, and an intelligent control method thereof.

[0010] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: an intelligent control phase change cold storage device, comprising several phase change cold storage modules and an intelligent control module;

[0011] The phase change cold storage modules are all placed on the top of the cold storage. The phase change cold storage modules are divided into fixed phase change cold storage modules and movable phase change cold storage modules. The fixed phase change cold storage modules are fixedly connected to the top of the cold storage, and the movable phase change cold storage modules can move in the vertical direction.

[0012] The phase change cold storage module includes two parallel fixed rods and several phase change cold storage boxes passing through the two fixed rods. The ends of the two fixed rods are connected by an end plate. The phase change cold storage box includes a cold storage box body and a phase change cold storage material filled inside the cold storage box body.

[0013] The intelligent adjustment module includes a processor, a temperature sensing module, and a drive mechanism. The drive mechanism is used to move the movable phase change cold storage module vertically up and down. The temperature sensing module includes multiple temperature sensors installed in the movable phase change cold storage module. The processor receives real-time temperature data detected by the temperature sensing module and sends action commands to the drive mechanism.

[0014] As a further optimization of the intelligent control phase change cold storage device of the present invention: the cold storage box body is a flat cuboid structure, which has two parallel rectangular main planes and four rectangular side faces connecting the main planes. The cold storage box body has two hanging holes that penetrate the main planes and are isolated from their internal chambers. Two protruding support heads are respectively provided on the two main planes of the cold storage box body, and the two support heads are located between the two hanging holes.

[0015] As a further optimization of the intelligent control phase change cold storage device of the present invention: two clearance grooves are respectively provided on the two main planes of the cold storage box body, and the two clearance grooves are located between the two support heads.

[0016] As a further optimization of the intelligent control phase change cold storage device of the present invention: the driving device includes a winch, a fixed pulley, a suspension rope, and two movable pulleys. The two movable pulleys are respectively set on the two end plates of the phase change cold storage module. The fixed pulley and the winch are located on the same side of the cold storage. The fixed pulley is fixed to the top of the cold storage, and the winch is set on the floor of the cold storage. One end of the suspension rope is fixed to the top of the cold storage on the side opposite to the fixed pulley, and the other end of the suspension rope passes through the two movable pulleys and the fixed pulley in sequence and is connected to the winch.

[0017] As a further optimization of the intelligent control phase change cold storage device of the present invention: the support head is a frustum-shaped structure, the hanging hole on the cold storage box body is a circular through hole, the diameter of the hanging hole is larger than the diameter of the bottom surface of the support head, the center point of the hanging hole, the support head and the clearance groove are located in the same plane, and this plane is perpendicular to the main plane of the cold storage box body and parallel to the long side elevation of the cold storage box body. The distance between the two support heads is l1, and the distance between one of the clearance grooves and the hanging hole away from the clearance groove is l2, and l1 and l2 are equal.

[0018] The present invention also provides an energy-saving cold storage, including a refrigeration unit, shelves, and the above-mentioned intelligent control phase change cold storage device;

[0019] The intelligent control phase change cold storage device has several phase change cold storage modules arranged along the length of the passageway above the passageway. The air outlet of the refrigeration unit's air cooler is set towards the phase change cold storage module. The fixed phase change cold storage module is located close to the air cooler, and the movable phase change cold storage module is located away from the air cooler.

[0020] The air outlet direction of the air cooler is parallel to the plane of the channel between the phase change cold storage boxes in the phase change cold storage module.

[0021] As a further optimization of the energy-saving cold storage of the present invention: the top of the cold storage is divided into three areas from near to far along the air outlet direction of the air cooler: area one, area two, and area three. Area one has multiple fixed phase change cold storage modules arranged side by side, and the multiple fixed phase change cold storage modules are arranged along the air outlet direction of the air cooler. Area two and area three have multiple movable phase change cold storage modules arranged side by side, and the multiple movable phase change cold storage modules are arranged along the air outlet direction of the air cooler.

[0022] As a further optimization of the energy-saving cold storage of the present invention: temperature sensors are installed in the movable phase change cold storage modules in regions two and three that are far away from the air cooler.

[0023] As a further optimization of the energy-saving cold storage of the present invention: the temperature sensor is fixed between two phase change cold storage boxes in the middle of the movable phase change cold storage module, and the temperature sensor is electrically connected to the data line of the processor through a spring signal line.

[0024] This invention also provides an intelligent control method for energy-saving cold storage:

[0025] During nighttime cooling, the movable phase change cold storage module is gradually lowered to the optimal cooling position, specifically:

[0026] When the ambient temperature T of the active phase change cold storage module S If the phase change temperature T0 of the phase change material inside the phase change cold storage box is 3℃, then the movable phase change cold storage module is lowered by 50-100mm, and T0 is compared again after 3-5 minutes. S With T0, if T S If T ≤ T0, then the active phase change cold storage module has reached the optimal charging position; if T S >T0-3℃, continue the descent operation of the active phase change cold storage module until T is met. S ≤T0-3℃;

[0027] During daytime cooling, the active phase change cold storage module is kept at its initial highest position.

[0028] The present invention has the following beneficial effects: Based on the existing fixed PCM technology, the present invention takes "position adjustable + intelligent feedback" as the core. During the nighttime cooling stage, the phase change cold storage module is lowered to the optimal cooling position according to the feedback signal of the temperature probe, thereby improving the cooling rate of the phase change cold storage module and ensuring the efficient and intelligent operation of the cold storage system. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a phase change cold storage device (the intelligent adjustment module is not shown).

[0030] Figure 2 This is a top view of the phase change cold storage module.

[0031] Figure 3 A three-dimensional structural diagram of the cold storage box body;

[0032] Figure 4 This is a side view of the cold storage box body.

[0033] Figure 5 This is a schematic diagram showing the stacking state of phase change cold storage boxes;

[0034] Figure 6 The state of the phase change cold storage equipment in the energy-saving cold storage under daytime cold release conditions (first-person perspective).

[0035] Figure 7 The state of the phase change cold storage equipment in the energy-saving cold storage under daytime cold release conditions (second perspective).

[0036] Figure 8 The state of the phase change cold storage equipment in the energy-saving cold storage under nighttime cooling conditions (first-person perspective).

[0037] Figure 9 The state of the phase change cold storage equipment in the energy-saving cold storage under nighttime cooling conditions (second perspective).

[0038] Marked in the image:

[0039] 1. Fixed phase change cold storage module;

[0040] 2. Active phase change cold storage module;

[0041] 3. Fixing rod;

[0042] 4. Phase change cold storage box;

[0043] 401. Cold storage box body;

[0044] 402, Hanging hole;

[0045] 403. Support head;

[0046] 404, clearance groove;

[0047] 405. Filling port;

[0048] 406. Groove;

[0049] 5. End plate;

[0050] 6. Drive mechanism;

[0051] 601. Winch;

[0052] 602. Fixed pulley;

[0053] 603. Suspension rope;

[0054] 604. Movable pulley;

[0055] 7. Temperature sensor;

[0056] 8. Spring signal line. Detailed Implementation

[0057] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0058] Phase change cold storage equipment

[0059] like Figure 1 As shown, an intelligent control phase change cold storage device includes several phase change cold storage modules and an intelligent control module.

[0060] The phase change cold storage modules are all placed on the top of the cold storage. The phase change cold storage modules are divided into fixed phase change cold storage module 1 and movable phase change cold storage module 2. The fixed phase change cold storage module 1 is fixedly connected to the top of the cold storage, and the movable phase change cold storage module 2 can move in the vertical direction.

[0061] like Figure 2-5 As shown, the phase change energy storage module includes two parallel fixed rods 3 and several phase change energy storage boxes 4 passing through the two fixed rods 3. The ends of the two fixed rods 3 are connected by end plates 5. The phase change energy storage box 4 includes an energy storage box body 401 and phase change energy storage material filled inside the energy storage box body 401. It utilizes the high latent heat phase change material (PCM) encapsulated inside to absorb or release a large amount of heat when it undergoes a phase change (usually a solid-liquid transition) at a specific temperature.

[0062] The cold storage box body 401 is a flat cuboid structure with two parallel rectangular main planes and four rectangular side faces connecting the main planes. The cold storage box body 401 has two hanging holes 402 that penetrate the main planes and are isolated from their internal chambers. Two protruding support heads 403 are respectively provided on the two main planes of the cold storage box body 401, and the two support heads 403 are located between the two hanging holes 402.

[0063] The cold storage box body 401 has a flat rectangular parallelepiped structure with two parallel rectangular main planes and four rectangular side faces connecting the main planes. This flat rectangular parallelepiped structure provides a large effective heat exchange surface area, ensuring rapid and uniform heat transfer of the phase change material during charging (solidification heat release) and releasing (melting heat absorption). The cold storage box body 401 has two hanging holes 402 that penetrate the main planes and isolate them from the internal chambers, facilitating flexible and stable suspension of the cold storage box within the cold storage space and effectively utilizing the three-dimensional space.

[0064] Two protruding support heads 403, each with a frustum-shaped structure, are respectively provided on the two main planes of the cold storage box body 401. The two support heads 403 are located between two hanging holes 402. The support heads 403 can have two specific structural forms: first, the support head 403 is integrally formed with the cold storage box body 401; second, the support head 403 is detachably connected to the cold storage box body 401. Specifically, a mounting groove with internal threads is provided on the main plane of the cold storage box body 401, allowing the lower part of the support head 403 to be screwed into the mounting groove.

[0065] Raised support heads are added to the main planes on both sides of the cold storage box. When multiple cold storage boxes are suspended side by side, the corresponding support heads on adjacent boxes will abut against each other, acting like built-in "limiters," automatically and reliably forming a uniform air gap between the boxes. The formed gap becomes a channel for the natural convection of cold air (or hot air during cooling), greatly improving the airflow between the boxes and avoiding the decrease in heat exchange efficiency caused by close contact (i.e., the "thermal short circuit" phenomenon). At the same time, the enhanced airflow ensures that the phase change material exchanges heat with the surrounding environment (cold air) more quickly and evenly during the cooling process (solidification heat release) and cooling release (melting heat absorption), shortening the cooling time and extending the cooling release duration.

[0066] The cold storage box body 401 is also provided with a filling port 405, which is located on one of the smaller side surfaces. This side surface has a recess, and the filling port 405 is located in the recess.

[0067] Two clearance grooves 404 are respectively provided on the two main planes of the cold storage box body 401, and the two clearance grooves 404 are located between the two support heads 403. The support head 403 has a frustum-shaped structure. The hanging hole 402 on the cold storage box body 401 is a circular through hole, and the diameter of the hanging hole 402 is larger than the diameter of the bottom surface of the support head 403. The center points of the hanging hole 402, the support head 403 and the clearance groove 404 are located in the same plane, and this plane is perpendicular to the main plane of the cold storage box body 401 and parallel to the long side surface of the cold storage box body 401. The distance between the two support heads 403 is L1, and the distance between one of the clearance grooves 404 and the hanging hole 402 away from the clearance groove 404 is L2. L1 and L2 are equal.

[0068] Through the above structural design, during stacking, the support head on the bottom surface of the upper cold storage box can precisely embed into the corresponding clearance slot and hanging hole on the top surface of the lower cold storage box, while the support head on the top surface of the lower cold storage box can also embed into the corresponding structure on the bottom surface of the upper cold storage box. This "concave-convex interlocking" mechanism is like a built-in stacking guide rail. The nested cooperation between the support head and the hanging hole / clearance slot effectively prevents horizontal sliding and misalignment between boxes during transportation or storage, greatly improving the stability and safety of stacking. Nested stacking significantly reduces the stacking height, avoids the extra space waste caused by the protruding support head, and maximizes the use of transport vehicle or storage space. At the same time, the clearance slot provides a dedicated receiving space for the support head, avoiding deformation or damage caused by the support heads squeezing each other or hard contact with the box below during stacking. The functional components of the cold storage box itself (hanging holes, support heads) are combined with the newly added clearance slots to form a highly efficient stacking and positioning system. While ensuring that the core structure of the cold storage function is not affected, it perfectly solves the problem of efficient, stable and space-saving stacking of cold storage boxes with protruding support heads in non-working states (transportation, storage).

[0069] The main plane of the cold storage box body 401 is also provided with multiple "capsule-shaped" grooves 406. The main function of these grooves 406 is to increase the surface area of ​​the cold storage box. These grooves of a specific shape significantly increase the effective contact surface area between the cold storage box and the surrounding cold / hot air. The groove structure disturbs the laminar flow of air flowing across the surface of the box, breaks down the static air boundary layer (thermal resistance layer) that hinders heat exchange, and promotes the generation of micro-vortices in the air within the grooves, thereby greatly enhancing the convective heat transfer efficiency.

[0070] The intelligent adjustment module includes a processor, a temperature sensing module, and a drive mechanism 6. The drive mechanism 6 is used to drive the active phase change cold storage module to move up and down in the vertical direction. The temperature sensing module includes multiple temperature sensors 7 installed in the active phase change cold storage module 2. The processor receives the real-time temperature data detected by the temperature sensing module and sends action commands to the drive mechanism 6 to control the corresponding active phase change cold storage module to move up and down.

[0071] This intelligent adjustment module uses a temperature sensing module as the sensing point, a processor as the decision-making center, and a drive mechanism as the execution terminal. In the vertical dimension, it closes the "sensing-decision-execution" loop into a dynamic cold storage streamline: when the temperature signal inside the phase change cold storage module is captured in real time, the processor determines whether to send an action command to the drive mechanism based on the temperature information detected by the sensor. Under the drive command, the drive mechanism applies vertical displacement to the active phase change cold storage module, so that the module height is consistent with the core area of ​​the cold air jet. This enables rapid charging and cooling of the cold storage medium and efficient deposition of latent heat of phase change in a low dynamic pressure area far away from the air cooler. Finally, through the displacement-temperature closed-loop coupling mechanism, the charging efficiency of the cold storage system is achieved in the entire operating range.

[0072] Energy-saving cold storage

[0073] like Figure 7 and 9 As shown, an energy-saving cold storage facility includes a refrigeration unit, shelving, and the aforementioned intelligent control phase change cold storage equipment. The refrigeration unit can be a vapor compression refrigeration system, consisting of a variable frequency semi-hermetic screw compressor, a shell-and-tube condenser, an electronic expansion valve, and a cooler evaporator connected in sequence, using R449A as the refrigerant.

[0074] Several phase change cold storage modules in the intelligent control phase change cold storage equipment are arranged above the passageway along the length of the passageway. The air outlet of the refrigeration unit's air cooler is set towards the air channel between the ice boxes of the phase change cold storage modules. The fixed phase change cold storage module 1 is located close to the air cooler, and the movable phase change cold storage module 2 is located away from the air cooler.

[0075] The air outlet direction of the air cooler is parallel to the plane where the phase change cold storage box 4 is located in the phase change cold storage module.

[0076] The drive mechanism 6 includes a winch 601, a fixed pulley 602, a suspension rope 603, and two movable pulleys 604. The two movable pulleys 604 are respectively installed on the two end plates 5 of the phase change cold storage module. The fixed pulley 602 and the winch 601 are located on the same side of the cold storage. The fixed pulley 602 is fixed to the top of the cold storage, and the winch 601 is installed on the floor of the cold storage. One end of the suspension rope 603 is fixed to the top of the cold storage on the side opposite to the fixed pulley 602, and the other end of the suspension rope 603 passes through the two movable pulleys 604 and the fixed pulley 602 in sequence before being connected to the winch 601.

[0077] When the module needs to be lowered, the winch 601 switches to rope release mode (the drum rotates clockwise), at which time the movable phase change cold storage module moves downward.

[0078] When the module needs to rise, the winch 601 switches to the rope winding mode (the drum rotates counterclockwise), at which time the movable phase change cold storage module moves upward.

[0079] The 601 winch is equipped with an encoder and a PLC controller to achieve closed-loop displacement control. The safe distance between the top of the movable phase change cold storage module and the top of the cold storage is monitored in real time by a limit switch (proximity sensor) to prevent overtravel collisions (such as triggering a stop when the movable phase change cold storage module rises to 300mm from the top).

[0080] The top of the cold storage is divided into three zones from near to far along the airflow direction of the air cooler: Zone 1, Zone 2, and Zone 3. Zone 1 has multiple fixed phase change cold storage modules 1 arranged side by side, aligned with the airflow direction of the air cooler. Zones 2 and 3 have multiple movable phase change cold storage modules 2 arranged side by side, also aligned with the airflow direction of the air cooler. All the side-by-side fixed and movable phase change cold storage modules 1 and 2 share a common end plate 5.

[0081] Temperature sensors 7 are installed in the movable phase change cold storage modules 2 in areas 2 and 3, which are far away from the air cooler. Temperature sensors 7 can be platinum resistance temperature sensors (PT1000).

[0082] Temperature sensor 7 is fixed between two phase change cold storage boxes 4 in the middle of the movable phase change cold storage module 2. Temperature sensor 7 is electrically connected to the processor's data line via spring signal line 8. Spring signal line 8 adopts a multi-layer composite structure, with a core of silver-plated copper alloy stranded conductor, an outer PTFE insulation layer and a stainless steel helical spring support, and an outer layer of silicone rubber protection and metal braided shielding. Its function is to maintain a constant impedance of the signal transmission path through elastic expansion and contraction when temperature sensor 7 moves back and forth with the module, while resisting the low temperature of the cold storage, vibration and electromagnetic interference, ensuring high-speed and reliable transmission of temperature data.

[0083] Intelligent Control Methods for Energy-Saving Cold Storage

[0084] like Figure 8 As shown, during nighttime charging, the movable phase change cold storage module is lowered to the optimal charging position. Specifically:

[0085] During nighttime cooling, the movable phase change cold storage module is gradually lowered to the optimal cooling position, specifically:

[0086] When the ambient temperature T of the active phase change cold storage module S If the phase change temperature T0 of the phase change material inside the phase change cold storage box is 3℃, then the movable phase change cold storage module is lowered by 50-100mm, and T0 is compared again after 3-5 minutes. S With T0, if T S If T < T0-3℃, the movable phase change cold storage module reaches the optimal charging position; if T < T0-3℃, the module reaches the optimal charging position. S >T0-3℃, continue the descent operation of the active phase change cold storage module until T is met. S ≤T0-3℃.

[0087] Assumptions: Initial height of the active phase change cold storage module: 2800mm, initial T S = -18℃ (T0 = -20℃).

[0088] The regulation process is as follows:

[0089] Initial descent 80mm → Altitude 2720mm, wait 4 minutes → T S =-18.5℃, T S >T0-3℃;

[0090] Continue descending 80mm → Height 2640mm, wait 4 minutes → T S =-19.5℃, T S >T0-3℃;

[0091] Continue descending 80mm → Height 2560mm, wait 4 minutes → T S =-21℃, T S >T0-3℃;

[0092] Continue descending 80mm → Height 2480mm, wait 4 minutes → T S =-23℃, T S When the temperature is ≤T0-3℃, the control program stops, and the active phase change cold storage module reaches the optimal charging position.

[0093] Because the multiple movable phase change cold storage modules are located at different distances from the air cooler, the height at which the movable phase change cold storage modules reach the charging position also varies depending on their location. Figure 8 As shown, it presents a stepped shape.

[0094] During daytime cooling, the active phase change cold storage module is kept at its initial highest position.

[0095] like Figure 9 As shown, during the day, the movable phase change cold storage module is raised to its initial position.

[0096] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. An energy-saving cold storage, characterized in that: This includes refrigeration units, shelving, and intelligent control phase change cold storage equipment; The intelligent control phase change cold storage equipment includes several phase change cold storage modules and an intelligent control module; The phase change cold storage modules are all placed on the top of the cold storage. The phase change cold storage modules are divided into fixed phase change cold storage modules (1) and movable phase change cold storage modules (2). The fixed phase change cold storage modules (1) are fixedly connected to the top of the cold storage, and the movable phase change cold storage modules (2) can move in the vertical direction. The phase change cold storage module includes two parallel fixed rods (3) and several phase change cold storage boxes (4) passing through the two fixed rods (3). The ends of the two fixed rods (3) are connected by an end plate (5). The phase change cold storage box (4) includes a cold storage box body (401) and a phase change cold storage material filled inside the cold storage box body (401). The intelligent adjustment module includes a processor, a temperature sensing module and a drive mechanism (6). The drive mechanism (6) is used to drive the active phase change cold storage module to move up and down in the vertical direction. The temperature sensing module includes multiple temperature sensors (7) set in the active phase change cold storage module (2). The processor receives the real-time temperature data detected by the temperature sensing module and sends an action command to the drive mechanism (6). The intelligent control phase change cold storage device has several phase change cold storage modules arranged along the length of the passageway above the passageway. The air outlet of the refrigeration unit's air cooler is set towards the phase change cold storage module. The fixed phase change cold storage module (1) is located close to the air cooler, and the movable phase change cold storage module (2) is located away from the air cooler. The air outlet direction of the air cooler is parallel to the plane of the channel between the phase change cold storage boxes (4) in the phase change cold storage module; The control method for this energy-saving cold storage is as follows: During nighttime cooling, the movable phase change cold storage module is gradually lowered to the optimal cooling position, specifically: When the ambient temperature T of the active phase change cold storage module S If the phase change temperature T0 of the phase change material inside the phase change cold storage box is 3℃, then the movable phase change cold storage module is lowered by 50-100mm, and T0 is compared again after 3-5 minutes. S With T0, if T S If T < T0-3℃, the movable phase change cold storage module reaches the optimal charging position; if T < T0-3℃, the module reaches the optimal charging position. S >T0, continue executing the descent operation of the active phase change cold storage module until T is met. S ≤T0-3℃; During daytime cooling, the active phase change cold storage module is kept at its initial highest position.

2. The energy-saving cold storage as described in claim 1, characterized in that: The cold storage box body (401) is a flat cuboid structure with two parallel rectangular main planes and four rectangular side faces connecting the main planes. The cold storage box body (401) has two hanging holes (402) that penetrate the main planes and are isolated from their internal chambers. Two protruding support heads (403) are respectively provided on the two main planes of the cold storage box body (401), and the two support heads (403) are located between the two hanging holes (402).

3. The energy-saving cold storage as described in claim 2, characterized in that: Two clearance slots (404) are respectively provided on the two main planes of the cold storage box body (401), and the two clearance slots (404) are located between the two support heads (403).

4. The energy-saving cold storage as described in claim 3, characterized in that: The support head (403) is a frustum-shaped structure. The hanging hole (402) on the cold storage box body (401) is a circular through hole. The diameter of the hanging hole (402) is larger than the diameter of the bottom surface of the support head (403). The center points of the hanging hole (402), the support head (403) and the clearance groove (404) are located in the same plane. This plane is perpendicular to the main plane of the cold storage box body (401) and parallel to the long side facade of the cold storage box body (401). The distance between the two support heads (403) is l1. The distance between one of the clearance grooves (404) and the hanging hole (402) away from the clearance groove (404) is l2. l1 and l2 are equal.

5. The energy-saving cold storage as described in claim 1, characterized in that: The drive mechanism (6) includes a winch (601), a fixed pulley (602), a hoisting rope (603), and two movable pulleys (604). The two movable pulleys (604) are respectively installed on the two end plates (5) of the phase change cold storage module. The fixed pulley (602) and the winch (601) are located on the same side of the cold storage. The fixed pulley (602) is fixed to the top of the cold storage, and the winch (601) is installed on the floor of the cold storage. One end of the hoisting rope (603) is fixed to the top of the cold storage on the side opposite to the fixed pulley (602), and the other end of the hoisting rope (603) passes around the two movable pulleys (604) and the fixed pulley (602) in sequence before being connected to the winch (601).

6. The energy-saving cold storage as described in claim 1, characterized in that: The top of the cold storage is divided into three areas from near to far along the air outlet direction of the air cooler: area one, area two, and area three. Area one has multiple fixed phase change cold storage modules (1) arranged side by side, and the multiple fixed phase change cold storage modules (1) are arranged along the air outlet direction of the air cooler. Area two and area three have multiple movable phase change cold storage modules (2) arranged side by side, and the multiple movable phase change cold storage modules (2) are arranged along the air outlet direction of the air cooler.

7. The energy-saving cold storage as described in claim 6, characterized in that: Temperature sensors (7) are installed in the movable phase change cold storage modules (2) in regions two and three that are far from the air cooler.

8. The energy-saving cold storage as described in claim 7, characterized in that: The temperature sensor (7) is fixed between two phase change cold storage boxes (4) in the middle of the movable phase change cold storage module (2), and the temperature sensor (7) is electrically connected to the data line of the processor through the spring signal line (8).

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