A phase change plate structure with built-in ribs
By setting transverse or longitudinal ribs or crisscrossing ribs inside the phase change plate housing, the melting and delamination problem of the phase change plate is solved, achieving more uniform heat exchange and more stable temperature control, thus improving the heat transfer performance and efficiency of the phase change plate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU UNIV
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-26
AI Technical Summary
During the heat transfer process, the melting and stratification phenomenon caused by the density difference between liquid and solid phase change materials in phase change plates affects the uniformity of heat transfer, reduces the temperature control effect and the efficiency of use.
Transverse or longitudinal ribs or crisscrossing ribs are set inside the phase change plate housing to form multiple independent units, which enhances heat transfer and uniform heat exchange. The ribs are connected by welding to ensure stability and heat transfer efficiency.
It effectively reduces the melting and stratification phenomenon of phase change materials, improves the heat transfer rate and temperature control uniformity, enhances the reliability and energy efficiency of the temperature control system, and prevents phase change material contamination.
Smart Images
Figure CN224290431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of phase change energy storage technology, specifically to a phase change plate structure with built-in ribs. Background Technology
[0002] Phase change plates (PCPs) are widely used in energy storage and temperature control, appearing in scenarios such as underground refuge chambers and data centers. During the melting process of non-phase change materials within a PCP, the density difference between the liquid and solid states causes the molten liquid PCP to rise due to buoyancy, while the unmelted solid PCP remains at the bottom, resulting in stratification. This stratification severely affects the heat transfer uniformity of the PCP, leading to a situation where the upper part of the PCP is hotter than the lower part. This not only reduces the temperature control effect of the PCP, making it unable to stably maintain the ambient temperature, but also affects its thermal performance, prolonging energy storage and release time and reducing overall efficiency. Utility Model Content
[0003] To address the above technical problems, this invention provides a phase change plate structure with built-in fins, which effectively solves the problem of phase change plate melting and delamination, and significantly improves its thermal performance.
[0004] The technical solution is as follows: A phase change plate structure with built-in ribs includes a phase change plate shell. The key feature is that the phase change plate shell has an opening at the top and a hollow internal structure. A phase change plate top cover is provided on the top of the shell. At least two ribs are provided inside the shell, and these ribs are welded to the inner wall of the shell. Small circular holes are provided on the ribs. With this structure, multiple ribs inside the shell divide the interior into multiple independent, non-influencing units, effectively reducing the melting and delamination phenomenon of the phase change material. The ribs also accelerate heat transfer, increasing the heat transfer rate and allowing for more uniform heat exchange. The phase change plate shell and top cover are detachable; the shell is opened when adding phase change material and closed after addition to prevent contamination of the internal phase change material.
[0005] Preferably, the top of the phase change plate housing and the top cover of the phase change plate are fitted with a clearance of 1mm. This clearance fit is convenient and easy to operate.
[0006] Preferably, the ribs are evenly arranged inside the phase change plate housing. This structure ensures that the phase change plate housing is divided into uniformly sized independent units, increasing the heat transfer area and enhancing thermal conductivity.
[0007] Preferably, the ribs include transverse ribs, longitudinal ribs, or a combination of transverse and longitudinal ribs;
[0008] When the ribs are transverse or longitudinal ribs, the transverse or longitudinal ribs are arranged in one direction inside the phase change plate housing.
[0009] When the fins are a combination of transverse and longitudinal fins, the transverse and longitudinal fins are arranged alternately inside the phase change plate housing. This structure allows for customization of the fin installation within the phase change plate housing, thereby enhancing heat transfer efficiency and controlling the heat flow path.
[0010] Preferably, when the interior of the phase change plate housing uses transverse ribs, the length of the transverse ribs is less than or equal to the width of the phase change plate housing;
[0011] When longitudinal ribs are used inside the phase change plate housing, the length of the longitudinal ribs is less than or equal to the height of the phase change plate housing. This structure meets design requirements, ensuring that the transverse or longitudinal ribs are located inside the phase change plate housing and guaranteeing the normal closing or opening of the phase change plate housing and the phase change plate top cover.
[0012] Preferably, when the ribs consist of transverse ribs and longitudinal ribs, the intersection of the transverse ribs and longitudinal ribs is connected by welding. This structure, using welding, ensures a strong connection and prevents movement between the transverse ribs and longitudinal ribs.
[0013] Preferably, the number of small circular holes on the rib is greater than or equal to one. This structure ensures uniform heat transfer, thereby achieving a dual improvement in heat exchange performance and reliability.
[0014] Preferably, the rib is made of stainless steel, aluminum, copper, or a novel thermally conductive polymer, and has an irregular shape with a width of 10mm and a thickness of ≤15mm. This structure allows for a variety of choices in the material and shape of the rib, adapting to different situations.
[0015] Preferably, the phase change plate housing is made of aluminum, copper, or stainless steel, and its thickness is 10mm on all four sides and bottom. A self-cleaning coating is applied to the surface of the phase change plate housing. This structure ensures the structural strength of the phase change plate housing, and the coating enables self-cleaning.
[0016] Compared with existing technologies, the advantages of this utility model are as follows: It is applicable to various applications of temperature control using phase change materials. By setting transverse fins, longitudinal fins, or crisscrossing fins in the basic phase change plate, the interior of the phase change plate is divided into multiple independent units that do not affect each other. This effectively reduces the melting and delamination phenomenon of the phase change material. When the ambient temperature changes and the phase change plate needs to absorb or release heat, the fins can accelerate heat transfer, improve the heat transfer rate, and allow the phase change plate to exchange heat more evenly. At the same time, the length and number of fins can be adjusted according to actual needs to further optimize the thermal performance of the phase change plate, making it more stable in maintaining the ambient temperature, preventing local temperature anomalies, and improving the reliability and energy efficiency of the entire temperature control system. Furthermore, a phase change plate top cover with a clearance fit is provided on the phase change plate shell. When injecting phase change material into the phase change plate shell, the phase change plate top cover is opened; when in use, the phase change plate top cover is closed, which can prevent contamination of the internal phase change material during use, thereby affecting the effect of the phase change material. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the structure when the transverse ribs and longitudinal ribs do not intersect;
[0019] Figure 3 A structural diagram showing the increase in the number of longitudinal ribs while keeping the number of transverse ribs constant.
[0020] Figure 4 A schematic diagram of a structure in which the number of transverse ribs is increased while the number of longitudinal ribs remains unchanged;
[0021] Figure 5 This is a schematic diagram of a structure in which transverse ribs are evenly arranged inside the phase change plate housing. Detailed Implementation
[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.
[0023] like Figure 1-5 As shown, a phase change plate structure with built-in ribs includes a phase change plate housing 2. The phase change plate housing 2 has an opening at the top and a hollow structure inside. A phase change plate top cover 1 is provided on the top of the phase change plate housing 2. At least two ribs are provided inside the phase change plate housing 2. The ribs are welded to the inner sidewall of the phase change plate housing 2. The ribs have small circular holes, and the number of small circular holes on the ribs is greater than or equal to one.
[0024] The phase change plate top rod 1 can be used to seal the phase change plate housing 2. The top of the phase change plate housing 2 and the phase change plate top cover 1 are fitted with a clearance of 1mm. If necessary, a plastic ring can be added to optimize the seal and prevent internal material contamination.
[0025] The ribs are evenly arranged inside the phase change plate housing 2. The ribs include transverse ribs 3 or longitudinal ribs 4 or both transverse ribs 3 and longitudinal ribs 4. The ribs can be configured as a multi-level rib structure. There is no specific limit to the number of ribs. The shape is designed as an irregular structure, such as a wave shape or a sawtooth shape. The specific use and number of ribs should be based on the size of the phase change plate housing 2 and the required actual heat transfer effect.
[0026] When the rib is a transverse rib 3 structure, the transverse rib 3 is arranged transversely inside the phase change plate housing 2, and the length of the transverse rib 3 is less than or equal to the width of the phase change plate housing 2; when the rib is a longitudinal rib 4 structure, the longitudinal rib 4 is arranged longitudinally inside the phase change plate housing 2, and the length of the longitudinal rib 4 is less than or equal to the height of the phase change plate housing 2.
[0027] When the ribs consist of transverse ribs 3 and longitudinal ribs 4, the transverse ribs 3 and longitudinal ribs 4 are arranged alternately inside the phase change plate housing 2. The transverse ribs 3 and longitudinal ribs 4 may or may not intersect. When they intersect, the intersecting portions are connected by welding to prevent mutual movement between the transverse ribs 3 and longitudinal ribs 4. When the lengths of the transverse ribs 3 and longitudinal ribs 4 are too small, resulting in no intersection between them, the ribs may not have round holes. In addition to the transverse ribs 3 and longitudinal ribs 4, oblique ribs can also be added.
[0028] Transverse fins 3, longitudinal fins 4, or crisscrossing fins are set in the basic phase change plate shell 2, thereby dividing the interior of the phase change plate shell 2 into multiple independent units that do not affect each other. This reduces the intensity of natural convection and constrains its flow range, which can reduce the disordered migration of liquid phase change material caused by density differences. This can effectively weaken the melting and stratification phenomenon of phase change material. When the ambient temperature changes and the phase change plate needs to absorb or release heat, the fins can accelerate heat transfer, improve the heat transfer rate, and allow the phase change plate to exchange heat more evenly. At the same time, the length and number of fins can be adjusted according to actual needs to further optimize the thermal performance of the phase change plate, so that it can more stably maintain the ambient temperature, prevent local temperature anomalies, and improve the reliability and energy efficiency of the entire temperature control system.
[0029] The rib is made of one of aluminum, copper, a new thermally conductive polymer, or stainless steel, with a width of 10 mm and a thickness of ≤15 mm. The phase change plate housing 2 is made of one of aluminum, copper, or stainless steel, with a thickness of 10 mm on all sides and bottom. A self-cleaning coating is applied to the surface of the phase change plate housing 2.
[0030] The following provides two embodiments, in which the use and number of ribs are merely illustrative examples. The specific use and number of ribs should be based on the size of the phase change plate shell 2 and the required actual heat transfer effect, and should not be construed as a limitation of this utility model.
[0031] Example 1
[0032] In the use of underground refuge chambers, appropriate phase change materials, such as paraffin wax, are selected based on the heat dissipation requirements of personnel and equipment. Paraffin wax can effectively absorb heat and stabilize the indoor temperature in this scenario. Copper is the preferred material for the transverse ribs 3 and longitudinal ribs 4 due to its excellent thermal conductivity, which accelerates heat transfer. The phase change plate shell 2 is made of stainless steel, with a thickness of 10mm on all sides and bottom, and an opening at the top, ensuring structural strength while facilitating the filling of the phase change material.
[0033] When making ribs, you can refer to... Figures 1 to 5 The phase change plate scheme determines the arrangement and number of transverse fins 3 and longitudinal fins 4. If the heat dissipation demand is high in a local area of the chamber, it can be determined according to... Figure 5 The fin layout features an increased number and length of fins, while ensuring the fin thickness is less than 15mm and the width is the same as the thickness of the phase change plate shell 2. After processing, the transverse fins 3 and longitudinal fins 4 are evenly welded inside the phase change plate shell 2 to form multiple independent units, enhancing heat transfer. When filling with phase change material, ensure uniform material distribution to avoid gaps that could affect heat transfer performance. Finally, install the top cover 1 with a 1mm clearance fit; if necessary, add a plastic ring to optimize the seal and prevent internal material contamination.
[0034] Example 2
[0035] In data centers, considering the large and consistently stable heat generation of data center servers, phase change materials with high latent heat of change are selected to efficiently absorb the heat generated by the servers. Horizontal fins 3 and vertical fins 4 are made of aluminum, which reduces weight and installation costs while ensuring thermal conductivity. The phase change plate housing 2 is made of aluminum alloy, 10mm thick on all sides and bottom, with an opening at the top. When manufacturing the fins, the layout and heat dissipation requirements of the data center servers should be considered. Figures 1 to 5 The scheme determines the arrangement and number of transverse and longitudinal ribs. The rib length and the number of ribs can be appropriately increased to improve the local heat dissipation effect, while ensuring that the rib thickness and width meet the design requirements. The transverse and longitudinal ribs are uniformly welded into the phase change plate shell 2 to form a high-efficiency heat transfer structure. The shell is filled with phase change material and the top cover 1 is installed to ensure good sealing.
[0036] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.
Claims
1. A phase change plate structure with built-in ribs, comprising a phase change plate housing (2), characterized in that: The phase change plate housing (2) has an opening at the top and a hollow structure inside. A phase change plate top cover (1) is provided on the top of the phase change plate housing (2). At least two ribs are distributed inside the phase change plate housing (2). The ribs are welded to the inner wall of the phase change plate housing (2). The ribs have small circular holes.
2. The phase change plate structure with built-in ribs according to claim 1, characterized in that: The top of the phase change plate housing (2) and the phase change plate top cover (1) are fitted with a clearance of 1 mm.
3. The phase change plate structure with built-in ribs according to claim 1, characterized in that: The ribs are evenly arranged inside the phase change plate housing (2).
4. The phase change plate structure with built-in ribs according to claim 3, characterized in that: The ribs include transverse ribs (3) or longitudinal ribs (4) or both transverse ribs (3) and longitudinal ribs (4); When the ribs are transverse ribs (3) or longitudinal ribs (4), the transverse ribs (3) or longitudinal ribs (4) are arranged in one direction inside the phase change plate housing (2); When the ribs are of the structure of transverse ribs (3) and longitudinal ribs (4), the transverse ribs (3) and longitudinal ribs (4) are arranged alternately inside the phase change plate housing (2).
5. The phase change plate structure with built-in ribs according to claim 4, characterized in that: When the interior of the phase change plate housing (2) is equipped with transverse ribs (3), the length of the transverse ribs (3) is less than or equal to the width of the phase change plate housing (2); When the interior of the phase change plate housing (2) is equipped with longitudinal ribs (4), the length of the longitudinal ribs (4) is less than or equal to the height of the phase change plate housing (2).
6. The phase change plate structure with built-in ribs according to claim 4, characterized in that: When the ribs are transverse ribs (3) and longitudinal ribs (4), the intersection of the transverse ribs (3) and longitudinal ribs (4) is connected by welding.
7. The phase change plate structure with built-in ribs according to claim 1, characterized in that: The number of small circular holes on the rib is greater than or equal to 1.
8. The phase change plate structure with built-in ribs according to claim 7, characterized in that: The rib is made of one of aluminum, copper, a new thermally conductive polymer, or stainless steel. The rib has an irregular shape with a width of 10 mm and a thickness of ≤15 mm.
9. The phase change plate structure with built-in ribs according to claim 1, characterized in that: The phase change plate housing (2) is made of aluminum, copper, or stainless steel. The thickness of the phase change plate housing (2) is 10 mm on all sides and at the bottom. A self-cleaning coating is applied to the surface of the phase change plate housing (2).