Intelligent regulation and control phase change cold storage equipment, energy-saving refrigeration house and intelligent regulation and control method of intelligent regulation and control phase change cold storage equipment

Abstract

The invention relates to the technical field of cold storage equipment, in particular to intelligent regulation and control phase change cold storage equipment, an energy-saving refrigeration house and an intelligent regulation and control method of the energy-saving refrigeration house. The cold storage equipment comprises a plurality of phase change cold storage modules and an intelligent adjusting module, the phase change cold storage modules are all arranged at the top of the refrigeration house, the multiple phase change cold storage modules are divided into the fixed phase change cold storage modules and the movable phase change cold storage modules, and the intelligent adjusting module comprises a processor, a temperature sensing module and a driving mechanism. The driving mechanism is used for driving the movable phase change cold storage module to move up and down in the vertical direction. The energy-saving refrigeration house comprises a refrigerating unit, a goods shelf and the intelligent regulation and control phase change cold storage equipment. On the basis of an existing fixed PCM technology, position adjustability and intelligent feedback serve as the core, in the night cold charging stage, the phase change cold storage module descends to the optimal cold charging position according to a feedback signal of a temperature probe, the cold charging speed of the phase change cold storage module is increased, and efficient and intelligent operation of a cold storage system of the refrigeration house is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of cold storage equipment, and in particular to an intelligently controlled phase-change cold storage device, an energy-saving cold storage, and an intelligent control method thereof. Background Art

[0002] Cold storage facilities use artificial refrigeration to maintain internal temperatures below 0°C or between 0°C and 15°C for the long-term storage of food, medicine, or chemical raw materials. Due to significant diurnal and seasonal fluctuations in heat loads due to heat transfer from the enclosure structure, the movement of goods in and out of the warehouse, and heat generated by lighting and equipment, cold storage requires a cold storage system to smooth out peaks and valleys, reducing the installed power and operating costs of the refrigeration units. Phase change thermal storage modules (PCM modules) utilize the properties of phase change materials (PCMs) to absorb or release latent heat during solid-liquid phase transitions. This allows them to "store" cooling energy during nighttime periods of low electricity prices or low outdoor temperatures, and "release" it during daytime periods of high electricity prices or high loads. This has become a common technology for cold storage energy conservation.

[0003] Most currently available solutions utilize a fixed installation method: PCM-encapsulated ice boxes or plates are fixed to the cold storage's roof trusses, side walls, or shelves using hangers and bolts. Once installed, the PCM modules maintain their spatial position throughout the entire operating cycle. For example, references 1 and 2 describe cold storage systems with phase change thermal storage.

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

[0005] Reference 1 describes a cold storage facility using top-mounted phase-change cold storage and its operation and control method. The facility comprises a refrigeration unit, shelves, a phase-change cold storage module, a temperature sensor, and an intelligent control system. The top-mounted phase-change cold storage module is located above the shelves, and its specific surface area increases from closer to the refrigeration unit to farther away. The temperature sensor is located within the cold storage facility and electrically connected to the intelligent control system. The refrigeration unit is electrically connected to the intelligent control system. The intelligent control system includes electrically connected components: a data acquisition module for acquiring data affecting refrigeration, a temperature prediction module for determining future temperature changes, and an intelligent control module for calculating the most economical operation plan. This method addresses the problem of poor refrigeration performance due to the irrational design of existing cold storage structures. It effectively mitigates temperature fluctuations within the cold storage facility, reduces the frequency of start-up and shutdown of the cold storage refrigeration equipment, and reduces 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, comprising a refrigeration device and a cold storage module disposed within the cold storage; the refrigeration device comprises a refrigerator outside the cold storage and a plurality of fans connected to the refrigerator and disposed within the cold storage, the fans being used to drive air circulation within the cold storage, the cold storage module being disposed parallel to the wind direction of the fans; the cold storage module comprising a plurality of cold storage ice boxes having sealed chambers disposed at intervals, the sealed chambers being filled with a phase-change cold storage agent, a plurality of guide members disposed on the outer sides of the cold storage ice boxes, the guide members extending laterally from at least one side wall of the cold storage ice boxes and gradually extending toward the bottom, a guide channel for guiding cold air being formed between adjacent guide members, or the guide members being guide channels for guiding cold air. The energy-saving cold storage, by disposing the cold storage module in the same direction as the wind direction of the fans, causes the cold air to sink, quickly forming a low-temperature environment within the cold storage; the cold storage module can also store excess cold energy, reducing electricity consumption, thereby saving energy and reducing emissions.

[0008] The core common deficiency of the above-mentioned fixed PCM modules is the "position-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, the density of cold air changes with temperature. When storing cold air at night, the cold air sinks, resulting in low cold storage efficiency of high-position modules), which restricts the cold storage efficiency. Summary of the Invention

[0009] The purpose of the present 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] In order to solve the above technical problems, the present invention adopts the following technical solutions: an intelligent control phase change cold storage device, comprising a plurality of phase change cold storage modules and an intelligent adjustment 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 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 be moved in the vertical direction. The phase change cold storage module includes two parallel fixed rods and a plurality of phase change cold storage boxes inserted on 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 in the cold storage box body. The intelligent adjustment module includes a processor, a temperature sensing module and a driving mechanism. The driving mechanism is used to drive the movable phase change cold storage module to move up and down in the vertical direction. The temperature sensing module includes multiple temperature sensors arranged in the movable phase change cold storage module. The processor receives real-time temperature data detected by the temperature sensing module and sends action instructions to the driving mechanism.

[0011] As a further optimization of an intelligent control phase change cold storage device of the present invention: the cold storage box body is a flat rectangular parallelepiped structure, which has two mutually parallel rectangular main planes and four rectangular side facades connecting the main planes. The cold storage box body has two hanging holes that pass through the main planes and are isolated from their internal chambers. Two raised 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.

[0012] As a further optimization of the intelligent control phase change cold storage device of the present invention: two avoidance grooves are respectively provided on the two main planes of the cold storage box body, and the two avoidance grooves are located between the two support heads.

[0013] As a further optimization of an intelligent control phase change cold storage device of the present invention: the driving device includes a winch, a fixed pulley, a lifting rope and two movable pulleys, the two movable pulleys are respectively arranged 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 on the top of the cold storage, and the winch is arranged on the floor of the cold storage. One end of the lifting rope is fixed on the top of the cold storage on the opposite side of the fixed pulley, and the other end of the lifting rope is connected to the winch after passing through the two movable pulleys and the fixed pulley in sequence.

[0014] As a further optimization of an intelligent control phase change cold storage device of the present invention: the support head is a truncated cone 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 points of the hanging hole, the support head and the avoidance groove are located in the same plane, and the 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 avoidance groove and the hanging hole away from the avoidance groove is l2, and l1 and l2 are equal.

[0015] The present invention also provides an energy-saving cold storage, comprising a refrigeration unit, shelves and the above-mentioned intelligent control phase change cold storage device; Several phase change cold storage modules in the intelligent control phase change cold storage device are arranged above the aisle along the length direction of the aisle, and the air outlet of the cooling fan of the refrigeration unit is arranged toward the phase change cold storage module. The fixed phase change cold storage module is located near the cooling fan, and the movable phase change cold storage module is located away from the cooling fan. The air outlet direction of the air cooler is parallel to the plane where the channels between the phase change cold storage boxes in the phase change cold storage module are located.

[0016] As a further optimization of an energy-saving cold storage of the present invention: the top of the cold storage is divided into area one, area two and area three from near to far along the air outlet direction of the air cooler, area one has a plurality of fixed phase change cold storage modules arranged side by side, and the plurality of fixed phase change cold storage modules are arranged along the air outlet direction of the air cooler, area two and area three have a plurality of movable phase change cold storage modules arranged side by side, and the plurality of movable phase change cold storage modules are arranged along the air outlet direction of the air cooler.

[0017] As a further optimization of the energy-saving cold storage of the present invention: temperature sensors are provided in the movable phase-change cold storage modules in the second and third areas away from the cold air blowers.

[0018] As a further optimization of an energy-saving cold storage of the present invention: the temperature sensor is fixed between the 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.

[0019] The present invention also provides an intelligent control method for energy-saving cold storage: During nighttime cold charging, the movable phase-change cold storage module is gradually lowered to the optimal cold charging position. Specifically: When the temperature of the environment where the movable phase change thermal storage module is located is T S > If the phase change temperature of the phase change material in the phase change cold storage box is T0-3℃, the movable phase change cold storage module is controlled to drop 50-100mm, and T is compared again after 3-5 minutes. S and T0, if T S ≤T0, the movable phase change cold storage module reaches the optimal cold charging position. If T S >T0-3℃, continue to execute the movable phase change cold storage module descending operation until T S ≤T0-3℃; When releasing cold during the day, the movable phase change thermal storage module is kept at the initial highest position.

[0020] 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 cold charging stage, the phase change cold storage module is lowered to the optimal cold charging position according to the feedback signal of the temperature probe, thereby improving the cold charging rate of the phase change cold storage module and ensuring the efficient and intelligent operation of the cold storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the phase change cold storage device (the intelligent adjustment module is not shown); Figure 2 Schematic diagram of the top view of the phase change cold storage module; Figure 3 Schematic diagram of the three-dimensional structure of the cold storage box body; Figure 4 It is a side view structural diagram of the cold storage box body; Figure 5 Schematic diagram of the stacking state of the phase change cold storage box; Figure 6 The status of the phase change cold storage equipment in the energy-saving cold storage under the daytime cooling condition (first person perspective); Figure 7 The state of the phase change cold storage equipment in the energy-saving cold storage under the daytime cooling condition (second perspective); Figure 8 This is the status of the phase change cold storage equipment in the energy-saving cold storage under the nighttime cold charging condition (first person perspective); Figure 9 The status of the phase change cold storage device in the energy-saving cold storage under the nighttime cold charging condition (second perspective); Markings in the figure: 1. Fixed phase change cold storage module; 2. Movable phase change cold storage module; 3. Fixing rod; 4. Phase change cold storage box; 401, cold storage box body; 402, hanging hole; 403, support head; 404, avoidance slot; 405, filling port; 406, groove; 5. End plate; 6. Driving mechanism; 601. winch; 602, fixed pulley; 603, hanging rope; 604, movable pulley; 7. Temperature sensor; 8. Spring signal line. DETAILED DESCRIPTION

[0022] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with examples, but the content of the present invention is not limited to the following examples.

[0023] <Phase change cold storage equipment> like Figure 1 As shown, an intelligent control phase change cold storage device includes several phase change cold storage modules and an intelligent adjustment module.

[0024] 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.

[0025] like Figure 2-5 As shown, the phase-change cold storage module includes two parallel fixed rods 3 and several phase-change cold storage cartridges 4 inserted into 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 cartridges 4 include a cold storage cartridge body 401 and a phase-change cold storage material filled within the cartridge body 401. The high-latent heat phase change material (PCM) encapsulated within the cartridge body absorbs or releases a large amount of heat when it undergoes a phase change (usually a solid-to-liquid transition) at a specific temperature.

[0026] The cold storage box body 401 is a flat rectangular parallelepiped structure having two parallel rectangular main planes and four rectangular side elevations connecting the main planes. The cold storage box body 401 has two hanging holes 402 that pass through the main planes and are isolated from their internal chambers. Two raised 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.

[0027] The cold storage box body 401 is a flat rectangular parallelepiped structure with two parallel rectangular main planes and four rectangular side elevations connecting the main planes. This flat rectangular structure provides a large effective heat exchange surface area, ensuring rapid and uniform heat transfer from the phase change material during both the charging (freezing) and releasing (melting) processes. The cold storage box body 401 features two hanging holes 402 that extend through the main planes and are isolated from the internal cavity. This facilitates flexible and stable hanging installation of the support head cold storage box within the cold storage space, effectively utilizing the three-dimensional space.

[0028] Two raised support heads 403 are provided on the two main planes of the cold storage box body 401, and the support heads 403 are truncated cone-shaped structures. The two support heads 403 are located between the two hanging holes 402. The specific structural forms of the support heads 403 can be two kinds. The first is that the support heads 403 and the cold storage box body 401 are integrally molded. The second is that the support heads 403 are detachably connected to the cold storage box body 401. Specifically, a mounting groove is provided on the main plane of the cold storage box body 401, and the mounting groove has an internal thread. The lower portion of the support head 403 can be screwed into the mounting groove.

[0029] Raised support heads have been added to the main surfaces of both sides of the cold storage box. When multiple cold storage boxes are hung side by side, the corresponding support heads on adjacent boxes will abut against each other, acting as built-in "limiters," automatically and reliably forming a uniform air gap between the boxes. This gap becomes a channel for natural convection of cold air (or hot air during cold charging), greatly improving airflow between the boxes and avoiding the decrease in heat exchange efficiency caused by close contact (a phenomenon known as "thermal short circuiting"). At the same time, the enhanced airflow ensures faster and more uniform heat exchange between the phase change material and the surrounding environment (cold air) during both the cold charging (solidification releases heat) and cold release (melting absorbs heat), shortening the cold charging time and extending the duration of cold release.

[0030] The cold storage box body 401 is further provided with a filling port 405, which is located on one of the smaller side elevations. The side elevation has a recessed portion, and the filling port 405 is disposed in the recessed portion.

[0031] Two avoidance grooves 404 are respectively provided on the two main planes of the cold storage box body 401, and the two avoidance grooves 404 are located between the two support heads 403. The support head 403 is a truncated cone-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 avoidance groove 404 are located in the same plane, and the plane is perpendicular to the main plane of the cold storage box body 401 and parallel to the long side elevation of the cold storage box body 401. The distance between the two support heads 403 is L1, and the distance between one avoidance groove 404 and the hanging hole 402 away from the avoidance groove 404 is L2, and L1 is equal to L2.

[0032] Through the above-mentioned structural design, when stacking, the support head on the bottom surface of the upper cold storage box can be accurately embedded in the corresponding avoidance groove and hanging hole on the top surface of the lower cold storage box, and at the same time, the support head on the top surface of the lower cold storage box can also be embedded in the corresponding structure on the bottom surface of the upper cold storage box. This "convex-concave interlocking" mechanism is like a built-in stacking guide. The nested coordination of the support head and the hanging hole / avoidance groove 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 protrusion of the support head, and maximizes the use of transportation vehicles or storage space. At the same time, the avoidance groove provides an exclusive accommodation space for the support head, avoiding deformation or damage caused by the support head 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 transformed into an efficient stacking positioning system in conjunction with the newly added avoidance grooves. 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 raised support heads in non-working states (transportation and warehousing).

[0033] The main surface of the cold storage box body 401 is also provided with a plurality of "capsule-shaped" grooves 406. These grooves 406 primarily increase the surface area of ​​the cold storage box. These specially shaped grooves 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 passing over the box surface, destroying the static air boundary layer (thermal resistance layer) that hinders heat exchange, and promoting the generation of micro-eddies within the grooves, thereby greatly enhancing the efficiency of convective heat transfer.

[0034] The intelligent adjustment module includes a processor, a temperature sensing module and a driving mechanism 6. The driving 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 arranged in the active phase change cold storage module 2. The processor receives real-time temperature data detected by the temperature sensing module and sends action instructions to the driving mechanism 6 to control the corresponding active phase change cold storage module to move up and down.

[0035] This intelligent adjustment module uses the temperature sensor module as the perception point, the processor as the decision-making center, and the drive mechanism as the execution terminal. In the vertical dimension, it closes the "perception-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 instruction to the drive mechanism based on the temperature information detected by the sensor. Driven by the displacement instruction, the drive mechanism applies a vertical displacement to the active phase change cold storage module to keep the module height consistent with the core area of ​​the cold air jet, thereby realizing rapid cold charging of the cold storage medium and efficient deposition of phase change latent heat in the low dynamic pressure area away from the air cooler. Finally, the cold charging efficiency of the cold storage system is achieved within the full working range through the displacement-temperature closed-loop coupling mechanism.

[0036] <Energy-saving cold storage> like Figure 7 and 9 As shown, an energy-saving cold storage includes a refrigeration unit, shelves, and the aforementioned intelligent phase-change cold storage device. The refrigeration unit can utilize a vapor compression refrigeration system consisting of a variable-frequency semi-hermetic screw compressor, a shell-and-tube condenser, an electronic expansion valve, and an air cooler evaporator connected in sequence, using R449A as the refrigerant.

[0037] Several phase change cold storage modules in the intelligent control phase change cold storage device are arranged above the aisle along the length direction of the aisle. The air outlet of the refrigeration unit's cold air blower is set toward the air channel between the ice boxes of the phase change cold storage module. The fixed phase change cold storage module 1 is located close to the cold air blower, and the movable phase change cold storage module 2 is located away from the cold air blower.

[0038] The air outlet direction of the air cooler is parallel to the plane where the phase change cold storage box 4 in the phase change cold storage module is located.

[0039] The driving 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 arranged 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 on the top of the cold storage. The winch 601 is set on the floor of the cold storage. One end of the suspension rope 603 is fixed on the top of the cold storage opposite to the fixed pulley 602, and the other end of the suspension rope 603 is connected to the winch 601 after passing through the two movable pulleys 604 and the fixed pulley 602 in sequence.

[0040] When the module needs to be lowered, the winch 601 is switched to the rope-releasing mode (the drum rotates clockwise), and the movable phase-change cold storage module moves downward.

[0041] When the module needs to be raised, the winch 601 is switched to the rope-collecting mode (the drum rotates counterclockwise), and the movable phase-change cold storage module moves upward.

[0042] The hoist 601 is equipped with an encoder and combined with 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 over-travel collision (for example, if the movable phase-change cold storage module rises to 300mm from the top, it will trigger a shutdown).

[0043] The top of the cold storage is divided into Area 1, Area 2, and Area 3, from near to far, along the air outlet direction of the air cooler. Area 1 has multiple fixed phase-change thermal storage modules 1 arranged side by side, arranged in the air outlet direction of the air cooler. Areas 2 and 3 have multiple movable phase-change thermal storage modules 2 arranged side by side, arranged in the air outlet direction of the air cooler. The fixed phase-change thermal storage modules 1 and the movable phase-change thermal storage modules 2 arranged side by side share a common end plate 5.

[0044] A temperature sensor 7 is provided in the movable phase-change cold storage module 2 in area 2 and area 3, which is far away from the air cooler. The temperature sensor 7 can be a platinum resistance temperature sensor (PT1000).

[0045] Temperature sensor 7 is fixed between the two phase-change cold storage boxes 4 in the middle of the movable phase-change cold storage module 2. It is electrically connected to the processor's data line via a spring signal cable 8. This multi-layer composite structure features a core of silver-plated copper alloy stranded conductors, encased in a PTFE insulation layer and a stainless steel coil spring support. The outer layer is protected by silicone rubber and a braided metal shield. This cable maintains a constant impedance in the signal transmission path through elastic expansion and contraction as the temperature sensor 7 moves back and forth with the module. This cable also protects against low temperatures, vibration, and electromagnetic interference within the cold storage, ensuring high-speed and reliable transmission of temperature data.

[0046] <Intelligent Control Methods for Energy-Saving Cold Storage> like Figure 8 As shown, during nighttime cold charging, the movable phase change thermal storage module is lowered to the optimal cold charging position. Specifically: During nighttime cold charging, the movable phase-change cold storage module is gradually lowered to the optimal cold charging position. Specifically: When the temperature of the environment where the movable phase change thermal storage module is located is T S > If the phase change temperature of the phase change material in the phase change cold storage box is T0-3℃, the movable phase change cold storage module is controlled to drop 50-100mm, and T is compared again after 3-5 minutes. S and T0, if T S ≤T0-3℃, the movable phase change cold storage module reaches the optimal cold charging position. If T S >T0-3℃, continue to execute the movable phase change cold storage module descending operation until T S ≤T0-3℃.

[0047] Assumptions: Initial height of the movable phase change thermal storage module: 2800mm, initial T S =-18℃ (T0=-20℃).

[0048] The control process is as follows: First descent 80mm → height 2720mm, wait 4 minutes → T S =-18.5℃, T S >T0-3℃; Continue to descend 80mm → height 2640mm, wait 4 minutes → T S =-19.5℃, T S >T0-3℃; Continue to descend 80mm → height 2560mm, wait 4 minutes → T S =-21℃, T S >T0-3℃; Continue to descend 80mm → height 2480mm, wait 4 minutes → T S =-23℃, T S ≤T0-3℃, the control program stops and the movable phase change cold storage module reaches the optimal cold charging position.

[0049] Since the distances between the multiple movable phase change cold storage modules and the air cooler are different, the heights of the movable phase change cold storage modules at different positions when they reach the cold charging position are also different. Figure 8 As shown, it presents a stepped shape.

[0050] When releasing cold during the day, the movable phase change thermal storage module is kept at the initial highest position.

[0051] like Figure 9As shown, during the day, the movable phase change thermal storage module is lifted to the initial position.

[0052] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various variations or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. An intelligently controlled phase-change cold storage device for cold storage, characterized by: It includes several phase change cold storage modules and intelligent adjustment modules; The phase change cold storage modules are all placed on the top of the cold storage, and 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) are movable in the vertical direction. The phase change cold storage module comprises two fixed rods (3) arranged in parallel and a plurality of phase change cold storage boxes (4) passing through the two fixed rods (3); the ends of the two fixed rods (3) are connected via an end plate (5); the phase change cold storage box (4) comprises a cold storage box body (401) and a phase change cold storage material filled in the cold storage box body (401); The intelligent adjustment module comprises a processor, a temperature sensing module, and a driving mechanism (6). The driving mechanism (6) is used to drive the movable phase-change cold storage module to move up and down in a vertical direction. The temperature sensing module comprises a plurality of temperature sensors (7) arranged in the movable phase-change cold storage module (2). The processor receives real-time temperature data detected by the temperature sensing module and sends an action instruction to the driving mechanism (6).

2. The intelligent control phase change cold storage device according to claim 1, characterized in that: The cold storage box body (401) is a flat rectangular parallelepiped structure having two mutually parallel rectangular main planes and four rectangular side elevations connected to the main planes. The cold storage box body (401) has two hanging holes (402) that pass through the main planes and are isolated from the internal chambers thereof. 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 intelligent control phase change cold storage device according to claim 2, characterized in that: Two avoidance grooves (404) are respectively provided on the two main planes of the cold storage box body (401), and the two avoidance grooves (404) are located between the two support heads (403).

4. The intelligent control phase change cold storage device according to claim 3, characterized in that: The support head (403) is a truncated cone 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 avoidance groove (404) are located in the same plane, and the plane is perpendicular to the main plane of the cold storage box body (401) and parallel to the long side elevation of the cold storage box body (401), the distance between the two support heads (403) is l1, the distance between one avoidance groove (404) and the hanging hole (402) away from the avoidance groove (404) is l2, and l1 and l2 are equal.

5. The intelligent control phase change cold storage device according to claim 1, characterized in that: The driving 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 arranged 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. The winch (601) is arranged on the floor of the cold storage. One end of the suspension rope (603) is fixed to the side of the top of the cold storage opposite to the fixed pulley (602). The other end of the suspension rope (603) passes through the two movable pulleys (604) and the fixed pulley (602) in sequence and is then connected to the winch (601).

6. An energy-saving cold storage, characterized by: It comprises a refrigeration unit, a shelf and the intelligent control phase change cold storage device according to any one of claims 1 to 5; The plurality of phase change cold storage modules in the intelligent control phase change cold storage device are arranged above the aisle along the length direction of the aisle, the air outlet of the cooling fan of the refrigeration unit is arranged toward the phase change cold storage module, the fixed phase change cold storage module (1) is located near the cooling fan, and the movable phase change cold storage module (2) is located away from the cooling fan; The air outlet direction of the air cooler is parallel to the plane where the channel between the phase change cold storage boxes (4) in the phase change cold storage module is located.

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

8. An energy-saving cold storage according to claim 7, characterized in that: Temperature sensors (7) are provided in the movable phase-change cold storage modules (2) in the second and third regions, which are away from the cooling fans.

9. An energy-saving cold storage according to claim 8, characterized in that: The temperature sensor (7) is fixed between the 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 via a spring signal line (8).

10. The intelligent control method for energy-saving cold storage according to claim 6, characterized in that: During nighttime cold charging, the movable phase-change cold storage module is gradually lowered to the optimal cold charging position. Specifically: When the temperature of the environment where the movable phase change thermal storage module is located is T S > If the phase change temperature of the phase change material in the phase change cold storage box is T0-3℃, the movable phase change cold storage module is controlled to drop 50-100mm, and T is compared again after 3-5 minutes. S and T0, if T S ≤T0-3℃, the movable phase change cold storage module reaches the optimal cold charging position. If T S >T0, continue to execute the movable phase change thermal storage module descending operation until T S ≤T0-3℃; When releasing cold during the day, the movable phase change thermal storage module is kept at the initial highest position.

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