Self-adjusting phase-change material insulation board

Abstract

The invention relates to the technical field of heat preservation plates, in particular to a self-adjusting phase-change material heat preservation plate which comprises an inner mounting frame and a second protection frame fixed in the inner mounting frame in a penetrating mode, a first protection frame is mounted in front of the second protection frame, a heat preservation layer is mounted in a front groove of the first protection frame in an embedded mode, and a vapor isolation layer is fixed to the front side of the heat preservation layer. And an outer protection plate is installed on the front side of the vapor barrier layer, a phase change material coating is sprayed to the interior of the first protection frame, and a miniature temperature control piece is installed in the front side face of the second protection frame. The self-adjusting phase-change material insulation board can actively intervene in the heat absorption and release process of the phase-change material coating according to the actual temperature requirement in a granary, the defect of passive temperature control is overcome, the phase change starting opportunity and the phase change rate of the phase-change material coating can be accurately and dynamically controlled, the temperature control failure of the phase-change material coating is avoided, and the service life of the granary is prolonged. Therefore, the heat preservation and insulation efficiency and effect of the heat preservation plate are improved, and a more stable and more energy-saving environment is provided for grain storage.

Description

Technical Field

[0001] This invention relates to the field of insulation board technology, specifically to a self-regulating phase change material insulation board. Background Technology

[0002] Insulation boards are key components in green building envelopes used to improve energy efficiency. Their main function is to achieve heat preservation and insulation by reducing heat transfer, thereby reducing heat loss in winter and cooling loss in summer, thus achieving the goal of building energy conservation. For example, grain silos, which are warehouse buildings, require the use of insulation boards during construction. Insulation boards enable low-temperature grain storage and are one of the key materials to ensure the quality of long-term grain storage. In order to effectively isolate the effects of high temperature and humidity from the outside and prevent grain from heating up, mold, and pests, modern grain silos generally adopt heat preservation technology. Insulation boards are installed inside the silos to form an efficient heat insulation barrier. For example, the patent disclosed in the prior art with publication number "CN219011560U" is entitled "A Wall Insulation Board for Grain Storage." It discloses that the connecting groove and protrusion have the same shape and are mutually compatible; the locking block and slot have the same shape and are mutually compatible; the board body is made of sheet metal, which is inexpensive, durable, lightweight, and easy to handle; the insulation layer uses insulation cotton with aluminum foil on the surface to isolate external heat and reduce its impact on the grain inside the grain storage; the moisture-proof layer uses extruded polystyrene board with a waterproof black film on the surface to prevent moisture from the external environment from entering the grain storage; the reinforcement layer uses PVC board, which has the advantages of low overall cost, good insulation performance, light weight, good compressive strength, convenient construction, good sound insulation, and waterproofing, while also being relatively lightweight; the insulation layer material is phenolic resin. Aldehyde foam possesses excellent thermal insulation and fire resistance, enabling grain silos to maintain a constant temperature. Similarly, the patent application "Disassembled Phase Change Material Sandwich Insulation Board" (CN109057060A) discloses a method using a detachable snap-fit ​​connection to form a cavity through an upper and lower shell. A sandwich panel containing adsorbed phase change material is placed within this cavity. This method effectively seals the adsorbed material within the cavity, preventing loss and failure, thus maintaining the long-term thermal insulation and heat storage properties of the insulation board based on the phase change material. Furthermore, the adsorption of the phase change material into the sandwich panel further locks it within the cavity, extending the lifespan of the insulation board based on the phase change material's thermal insulation properties.

[0003] The insulation boards in the prior art only passively provide thermal insulation through phase change materials. When the temperature changes too quickly, the heat absorption and release of the phase change materials cannot keep up with the rate of temperature change, which leads to the failure of the temperature control of the phase change material insulation board and affects the subsequent thermal insulation work. Therefore, we propose a self-regulating phase change material insulation board to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a self-regulating phase change material insulation board to solve the problem mentioned in the background art. In the current insulation board, the insulation is passively provided by the phase change material. When the temperature changes too quickly, the heat absorption and release of the phase change material cannot keep up with the rate of temperature change, which leads to the failure of the phase change material insulation board to control the temperature and affects the subsequent insulation work.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-regulating phase change material insulation board, comprising an inner mounting frame and a second protective frame that penetrates and is fixed inside it, wherein a first protective frame is installed in front of the second protective frame, an insulation layer is embedded in the front of the first protective frame, a vapor barrier layer is fixed to the front side of the insulation layer, and an outer protective plate is installed in front of the vapor barrier layer, a phase change material coating is sprayed inside the first protective frame, a miniature temperature control chip is installed inside the front side of the second protective frame, and a temperature sensor is connected to the rear side of the second protective frame.

[0006] Preferably, the first protective frame is equipped with horizontally and vertically distributed partition plates inside, with a gap between adjacent partition plates, and a second flow groove is opened inside the partition plate, and the partition plate is in contact with the phase change material coating.

[0007] Preferably, the insulation layer is made of rock wool board.

[0008] Preferably, the vapor barrier is made of aluminum foil composite film, which is used to block water vapor penetration and prevent the insulation layer from becoming damp and reducing its effectiveness.

[0009] Preferably, the phase change material coating is a sprayable coating made by dispersing PCM microcapsules in acrylic resin.

[0010] Preferably, the second protective frame has a through groove and a first flow groove inside, and the rear side of the partition plate is inserted into the corresponding through groove, and the first flow groove is arranged in an "X" shape.

[0011] Preferably, the outer sides of the inner mounting bracket are all slotted with snap-fit ​​blocks, and a protruding plate is provided through the slot in the snap-fit ​​block. The protruding plate is fixedly installed inside the inner mounting bracket, and one side of the protruding plate is connected to the inside of the snap-fit ​​block through a return spring.

[0012] Preferably, clamping grooves are formed on the outer side surfaces around the inner mounting frame, and corresponding clamping blocks are inserted into the clamping grooves.

[0013] Preferably, a moving frame is embedded in a groove on the front side surface of the outer protection plate. Convex rods are fixed on the rear side surfaces around the moving frame. The rear ends of the convex rods penetrate through the inside of the outer protection plate and then are inserted into the inside of the front side surface of the inner mounting frame. Clamping blocks are correspondingly arranged at the rear ends of the convex rods. One side surface of the clamping block close to the convex rod is inclined, and the clamping block forms a sliding structure through the convex rod. A screw is rotatably installed at the lower left of the outer protection plate, and the moving frame is threadedly connected to the outside of the screw.

[0014] Preferably, both the moving frame and the inner mounting frame are arranged in a "hui" - shaped structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The self - regulating phase - change material thermal insulation board can actively intervene in the heat absorption and heat release processes of the phase - change material coating according to the actual temperature requirements in the granary, compensating for the short - board of passive temperature control. It can accurately and dynamically control the phase - change starting time and phase - change rate of the phase - change material coating, avoiding the failure of temperature control of the phase - change material coating, and then improving the heat insulation efficiency and effect of the thermal insulation board, providing a more stable and energy - saving environment for grain storage. The specific contents are as follows: (1) The phase - change material coating is a sprayable coating made by dispersing PCM micro - capsules in acrylic resin. Therefore, through the heat storage and heat release characteristics of the phase - change material coating, the phase - change material coating can passively and automatically adjust the temperature in the granary. At the same time, cooperating with the micro - temperature control piece which is a semiconductor refrigeration / heating sheet, it can actively intervene in the heat absorption and heat release processes of the phase - change material coating according to the actual temperature requirements in the granary, compensating for the short - board of passive temperature control. It can accurately and dynamically control the phase - change starting time and phase - change rate of the phase - change material coating, avoiding the failure of temperature control of the phase - change material coating, and then improving the heat insulation efficiency and effect of the thermal insulation board, providing a more stable and energy - saving environment for grain storage, thereby reducing the heat loss in winter and cold loss in summer of the grain silo which belongs to the storage building, achieving the purpose of building energy conservation; (2) Due to the partition board made of copper, it is convenient to spray the phase - change material coating separately, and then the contact area between the phase - change material coating and the partition board can be increased, facilitating the partition board to transfer heat or cold to the phase - change material coating well, enabling the phase - change material coating to perform passive temperature control well; (3) By manually rotating the screw, the moving frame threadedly connected to the outside can be driven to move backward. Then the moving frame drives the convex rod to move backward, and the convex rod pushes the corresponding clamping block outwards, so that the clamping block can be inserted into the corresponding clamping groove, facilitating the clamping and splicing between two adjacent thermal insulation boards, and further ensuring the stability of the installation of the thermal insulation board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a partial cross-sectional view of the internal mounting bracket of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the separation structure of the inner mounting bracket and the outer protective plate of the present invention; Figure 6 This is a schematic diagram of the separation structure between the inner mounting bracket and the first protective frame of the present invention; Figure 7 This is a schematic diagram of the separation structure of the first protective frame and the second protective frame of the present invention; Figure 8 This is a schematic diagram of the rear view structure of the second protective frame of the present invention; Figure 9 This is a schematic diagram of the separation structure between the first protective frame and the phase change material coating of the present invention; Figure 10 This is a schematic diagram of the main cross-sectional structure of the internal mounting bracket of the present invention; Figure 11 This is a partial top sectional view of the internal mounting bracket of the present invention. Figure 12 This is a schematic diagram of the structure after the protrusion of the present invention moves backward; Figure 13 This is a schematic diagram of the separation structure of the outer protective plate and the movable frame of the present invention.

[0017] In the diagram: 1. Inner mounting bracket; 2. First protective frame; 3. Insulation layer; 4. Vapor barrier layer; 5. Outer protective plate; 51. Movable frame; 52. Protruding rod; 6. Second protective frame; 61. Through groove; 62. First flow groove; 7. Phase change material coating; 8. Separator plate; 81. Second flow groove; 9. Miniature temperature control plate; 10. Temperature sensor; 11. Snap-fit ​​groove; 12. Snap-fit ​​block; 13. Protruding plate; 131. Return spring; 14. Screw. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-13 The present invention provides the following technical solution: Embodiment 1: The self-regulating phase change material thermal insulation board in this embodiment facilitates the clamping and splicing between two adjacent thermal insulation boards, further ensuring the stability of the installation of the thermal insulation board. The specific structure is as shown in the attached Figure 1 , attached Figures 10-13 As shown in the figure, clamping blocks 12 are installed in grooves on the outer side surfaces around the inner mounting frame 1, and a convex plate 13 is arranged through the groove opened in the clamping block 12. The convex plate 13 is fixedly installed inside the inner mounting frame 1, and one side of the convex plate 13 is connected to the inside of the clamping block 12 through a return spring 131. Clamping grooves 11 are opened on the outer side surfaces around the inner mounting frame 1, and corresponding clamping blocks 12 are inserted into the inside of the clamping grooves 11. A moving frame 51 is installed in a groove on the front side surface of the outer protection plate 5 in an embedded manner. Convex rods 52 are fixed on the rear side surfaces around the moving frame 51. The rear ends of the convex rods 52 penetrate through the inside of the outer protection plate 5 and then are inserted into the inside of the front side surface of the inner mounting frame 1. The rear ends of the convex rods 52 are correspondingly provided with clamping blocks 12. One side surface of the clamping block 12 close to the convex rod 52 is arranged as an inclined surface, and the clamping block 12 forms a sliding structure through the convex rod 52. A screw 14 is rotatably installed at the lower left of the outer protection plate 5, and the outer side of the screw 14 is threadedly connected to the moving frame 51. Both the moving frame 51 and the inner mounting frame 1 are arranged in a "hui" character structure.

[0020] First, install multiple thermal insulation boards in appropriate positions inside the granary in sequence. After installation, rotate the screws 14 on the thermal insulation boards in sequence. When the screws 14 rotate, the moving frame 51 threadedly connected to the outside moves into the groove on the front side surface of the outer protection plate 5. The moving frame 51 drives the convex rods 52 to move together, so that the convex rods 52 are inserted into the inner mounting frame 1 to apply a thrust to the inclined surface of the corresponding clamping block 12 at the corresponding position, so that the clamping block 12 moves outwards and is inserted into the corresponding clamping groove 11 inside the adjacent thermal insulation board. At this time, the convex plate 13 penetrates through the groove inside the clamping block 12. Since the convex plate 13 is fixed, when the clamping block 12 moves outwards, the return spring 131 will be compressed, so that the return spring 131 stores energy, so as to automatically drive the clamping block 12 to move reversely and reset through the energy stored in the return spring 131 in the later stage. Therefore, multiple groups of clamping blocks 12 can be controlled to move simultaneously through multiple groups of convex rods 52, which facilitates the clamping and splicing between two adjacent thermal insulation boards, further ensuring the stability of the installation of the thermal insulation board and preventing the thermal insulation board from falling off.

[0021] Meanwhile, the interlocking structure between two adjacent insulation boards facilitates the later disassembly and replacement of the damaged insulation board in the middle position. The specific operation is as follows: when the insulation board in the middle position is damaged and needs to be disassembled and replaced, first rotate the screw 14 on the insulation board in the middle position in the opposite direction, and then rotate the screws 14 on the four adjacent insulation boards around the outer perimeter of the insulation board in the middle position in the opposite direction in sequence. This separates the corresponding interlocking block 12 from the corresponding interlocking groove 11. Then, remove the insulation board in the middle position from the appropriate position in the grain silo and pull it forward. Therefore, it is not necessary to remove the insulation boards around the perimeter first to disassemble and replace the damaged insulation board in the middle position. The operation is convenient, time-saving and labor-saving.

[0022] Example 2: Based on Example 1, the self-regulating phase change material insulation board in this example can actively intervene in the heat absorption and release process of the phase change material coating 7 according to the actual temperature requirements inside the grain silo. This compensates for the shortcomings of passive temperature control, allowing for precise and dynamic control of the phase change initiation timing and rate of the phase change material coating 7. This prevents the phase change material coating 7 from failing to control the temperature, thereby improving the insulation efficiency and effect of the insulation board. This provides a more stable and energy-efficient environment for grain storage, reducing heat loss in winter and cold loss in summer for grain silos, thus achieving the goal of building energy conservation. For the specific structure, please refer to the attached diagram. Figures 1-9 As shown, the inner mounting frame 1 and the second protective frame 6 are fixed inside it. A first protective frame 2 is installed in front of the second protective frame 6. An insulation layer 3 is embedded in the front of the first protective frame 2, and a vapor barrier 4 is fixed to the front side of the insulation layer 3. An outer protective plate 5 is installed in front of the vapor barrier 4. The interior of the first protective frame 2 is coated with a phase change material coating 7. A miniature temperature control chip 9 is installed inside the front side of the second protective frame 6, and a temperature sensor 10 is connected to the rear side of the second protective frame 6. The interior of the first protective frame 2 has horizontally and vertically distributed partition plates 8. There is a gap between the partition plates 8, and the partition plates 8 have a second flow groove 81 inside. The partition plates 8 are in contact with the phase change material coating 7. The insulation layer 3 is made of rock wool board, and the vapor barrier layer 4 is made of aluminum foil composite film to block water vapor penetration and prevent the insulation layer 3 from getting damp and reducing its efficiency. The phase change material coating 7 is a sprayable coating made of PCM microcapsules dispersed in acrylic resin. The second protective frame 6 has a through groove 61 and a first flow groove 62 inside, and the rear side of the partition plate 8 is inserted into the corresponding through groove 61, and the first flow groove 62 is set in an "X" shape.

[0023] Throughout the entire insulation board's operation, the phase change material coating 7, made of PCM microcapsules dispersed in acrylic resin, is a sprayable coating. When the outside temperature rises, such as during the day in summer when sunlight causes the grain silo wall temperature to rise, the PCM microcapsules in the phase change material coating 7 absorb heat and undergo a solid-to-liquid phase change. This prevents the temperature inside the insulation board and the grain silo from rising rapidly, thus preventing the grain from spoiling, sprouting, or breeding pests due to high temperatures. When the outside temperature drops, such as at night or in winter, the PCM microcapsules in the phase change material coating 7 solidify from a liquid state, releasing the previously stored heat and slowing down the rate of temperature drop inside the grain silo, maintaining a relatively stable low-temperature environment. PCM microcapsules help maintain a constant temperature and humidity environment inside the grain silo, which is crucial for ensuring the long-term safe storage of grain. A stable low-temperature environment can effectively inhibit the activity of microorganisms and pests, reducing grain loss. The copper partition plate 8 facilitates the separate spraying of the phase change material coating 7, thereby increasing the contact area between the phase change material coating 7 and the partition plate 8. This allows the partition plate 8 to effectively transfer heat or cold to the phase change material coating 7, enabling the phase change material coating 7 to passively control the temperature. Therefore, through the heat storage and heat release characteristics of the phase change material coating 7, the phase change material coating 7 can passively and automatically regulate the temperature inside the grain silo, thereby reducing heat loss in winter and cold loss in summer in grain silos, which are part of the storage building, achieving the goal of building energy conservation.

[0024] Temperature sensor 10 monitors the ambient temperature. When the PCM microcapsules are about to completely liquefy and become saturated due to heat absorption, the controller inside the insulation board activates the micro temperature control chip 9 to switch to cooling mode. The micro temperature control chip 9 is a semiconductor cooling / heating chip; it heats when forward-biased and cools when reverse-biased, causing the PCM microcapsules to solidify prematurely, restoring their heat absorption capacity and preventing thermal saturation, thus allowing them to continue buffering external heat loads. When the PCM microcapsules are about to completely solidify, the controller inside the insulation board activates the micro temperature control chip 9 to switch to heating mode, providing micro-heating to the PCM microcapsules, delaying complete solidification and extending the heat release time. This allows the PCM microcapsules to always operate in a partial phase change state, maintaining maximum temperature buffering capacity. If the temperature inside the grain silo continues to drop, the micro temperature control plate 9 can be used to directly heat the air inside the grain silo. Therefore, through the passive temperature control of the phase change material coating 7 and the active temperature control of the micro temperature control plate 9, precise, stable, and dynamic control of the internal temperature of the grain silo is ultimately achieved, thereby improving the thermal insulation efficiency and effect of the insulation board and providing a more stable and energy-efficient environment for grain storage. The vapor barrier layer 4 is an aluminum foil composite film that can block water vapor penetration and prevent the insulation layer 3, which is made of rock wool board, from becoming damp and reducing its effectiveness, thus completing a series of tasks.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-adjusting phase change material insulation board, comprising an inner mounting frame (1) and a second protective frame (6) that penetrates and is fixed inside it, wherein a first protective frame (2) is installed in front of the second protective frame (6), characterized in that: A thermal insulation layer (3) is embedded in a groove in front of the first protective frame (2), a vapor barrier layer (4) is fixed to the front side of the thermal insulation layer (3), and an outer protective plate (5) is installed on the front side of the vapor barrier layer (4). A phase change material coating (7) is sprayed inside the first protective frame (2). A micro temperature control piece (9) is installed inside the front side of the second protective frame (6), and a temperature sensor (10) is connected to the rear side of the second protective frame (6). Clamping blocks (12) are installed in grooves opened on the outer side surfaces around the inner mounting frame (1), and a convex plate (13) is arranged through the groove opened in the clamping block (12). The convex plate (13) is fixedly installed inside the inner mounting frame (1), and one side of the convex plate (13) is connected to the inside of the clamping block (12) through a return spring (131). Clamping grooves (1 2. The self-regulating phase change material insulation board according to claim 1, characterized in that: ​ 3. The self-regulating phase change material insulation board according to claim 1, characterized in that: ​ 4. The self-regulating phase change material insulation board according to claim 1, characterized in that: ​ 5. The self-regulating phase change material insulation board according to claim 1, characterized in that: ​ 6. The self-regulating phase change material insulation board according to claim 2, characterized in that: ​ 7. The self-regulating phase change material insulation board according to claim 1, characterized in that: ​

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