A trapezoidal phase change plate with fins and a phase change heat storage and heat exchange airflow channel

Abstract

This utility model discloses a trapezoidal phase change plate with fins and a phase change heat storage and exchange airflow channel. The trapezoidal phase change plate has a W1 end and a W2 end, with the length of the W1 end being shorter than the length of the W2 end. Fins, including transverse and longitudinal fins, are arranged inside the trapezoidal phase change plate and are welded to the interior of the plate. In the direct ventilation channel, the W1 end of the phase change plate preferentially contacts the high-temperature hot air, and the phase change material at the W1 end melts preferentially compared to the W2 end. The phase change plate can adjust its slope ratio according to actual conditions to adapt to different cooling scenarios, effectively solving the problem of uneven melting of the phase change material leading to damage and resulting in low heat storage and release efficiency and unstable thermal performance.

Description

Technical Field

[0001] This utility model relates to the field of phase change energy storage technology, specifically to a trapezoidal phase change plate with fins and a phase change heat transfer gas flow channel. Background Technology

[0002] Phase change plates (PCPs) are widely used in energy storage and temperature control, such as in underground refuge chambers and data centers. However, for conventional PCP structures, the front end of the PCP plate in a direct ventilation channel will preferentially come into contact with high-temperature hot air. The PCP material at the front end melts faster than at the rear end, resulting in uneven melting of the PCP material inside. Furthermore, most conventional encapsulation structures or fin settings are not properly designed, which can also lead to uneven melting of the PCP material in practical applications, resulting in low energy storage and heat release efficiency and unstable thermal performance. Utility Model Content

[0003] To solve the above technical problems, this utility model provides a trapezoidal phase change plate with fins and a phase change heat storage and exchange airflow channel, which can solve the problem of phase change material melting and delamination, and make the phase change material heatd uniformly and improve thermal conductivity.

[0004] The technical solution is as follows: The first aspect of the present invention provides a trapezoidal phase change plate containing fins, the key point of which is that it includes a trapezoidal phase change plate, one end of which is W1 and the other end is W2, wherein the length of the W1 end is less than the length of the W2 end, and fins are arranged inside the trapezoidal phase change plate, the fins including transverse fins and longitudinal fins, the fins being welded to the interior of the trapezoidal phase change plate. Using the above structure, the trapezoidal phase change plate significantly optimizes the heat transfer dynamics and structural reliability through geometric reconstruction. The trapezoidal phase change plate changes the shape of the traditional phase change plate, enabling heat to be radiated or conducted more evenly throughout the entire phase change plate, reducing local overheating or unmelted areas, improving system stability, and the fins inside the trapezoidal phase change plate divide the interior of the phase change plate into multiple independent and unaffected units, indirectly increasing the contact area between hot air and the phase change plate, improving the heat transfer efficiency of the phase change plate, and effectively reducing the air temperature.

[0005] Preferably, the trapezoidal phase change plate has a certain slope ratio, which is 1.5. Using this structure, the front and rear slope ratios of the trapezoidal phase change plate can be adjusted according to actual needs to adapt to different cooling scenarios, further optimizing the thermal performance of the phase change plate and improving the reliability and energy efficiency of the entire temperature control system.

[0006] Preferably, the fins have at least one small circular hole. This structure ensures uniform heat transfer through the small circular hole.

[0007] Preferably, the width of the fins is the same as the thickness of the trapezoidal phase change plate. The fins are arranged within the trapezoidal phase change plate in a horizontal parallel arrangement, a vertical parallel arrangement, or an alternating arrangement of horizontal and vertical fins. This structure allows for customization of the fin installation within the trapezoidal phase change plate, ensuring uniform heating of the phase change material without time or spatial limitations, ultimately improving overall temperature control and energy storage efficiency.

[0008] Preferably, the transverse and longitudinal fins are arranged alternately inside the trapezoidal phase change plate, and the intersecting portions of the transverse and longitudinal fins are joined by welding. Using this structure, the fins are arranged alternately within the trapezoidal phase change plate as needed, and the intersecting portions are connected by welding, ensuring a strong connection and preventing the transverse and longitudinal fins from shifting relative to each other.

[0009] A phase change heat storage and exchange airflow channel includes a straight ventilation channel. A fan and a phase change plate segment are sequentially arranged in the airflow direction of the straight ventilation channel. A trapezoidal phase change plate with fins, as provided in the first aspect of this invention, is arranged side-by-side along the airflow direction within the phase change plate segment. The W1 end of the trapezoidal phase change plate is close to the fan end. With this structure, the fan in the straight ventilation channel can draw in indoor hot air. The drawn-in hot air first contacts the W1 end of the trapezoidal phase change plate, and then contacts the W2 end. The phase change material at the W1 end melts preferentially compared to the W2 end, effectively solving the problem of uneven melting of the phase change material during use, thereby greatly improving the temperature control effect and thermal performance of the phase change plate.

[0010] Preferably, the fan is located at the entrance of the direct ventilation duct, and a filter screen is installed on the fan. This structure facilitates the intake of hot indoor air for subsequent cooling, and the filter screen prevents dust and insects from entering with the airflow.

[0011] Preferably, the trapezoidal phase change plates are evenly arranged within the phase change plate segment, with a spacing of 4 cm between adjacent trapezoidal phase change plates, and the surface of the trapezoidal phase change plates is coated with a functional coating. This structure facilitates adaptation to different arrangements within the phase change plate segment, and the distance between any two plates can be adjusted within a reasonable range.

[0012] Preferably, a vibration damping pad or rubber pad is also provided at the fan location. This fan can be one of an axial flow fan, a centrifugal fan, an exhaust fan, or a small DC fan. Using this structure, the vibration damping pad or rubber pad can reduce fan vibration and noise, allowing for selection of the appropriate fan type based on specific needs.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: It can solve the problem of uneven melting at the front and back during use caused by structural defects in existing phase change plates, thereby greatly improving the temperature control effect and thermal performance of the phase change plate. By changing the front and back slope ratio of the phase change plate and using three fin placement methods of vertical parallel, horizontal parallel and cross arrangement, the traditional basic phase change plate is structurally optimized, so that the phase change material in the trapezoidal phase change plate is not limited by time and space, and can be heated evenly. Ultimately, it improves the overall temperature control effect and energy storage efficiency, and can be used in airflow channels, making it suitable for occasions where temperature control is achieved using phase change materials. Attached Figure Description

[0014] Figure 1 A schematic diagram of a trapezoidal phase change plate containing fins;

[0015] Figure 2 for Figure 1 Top view;

[0016] Figure 3 for Figure 1 The front view;

[0017] Figure 4 This is a top view of the fins;

[0018] Figure 5 This is a schematic diagram showing the arrangement of fins within the trapezoidal phase change plate 1.

[0019] Figure 6 Taking the fins as an example of horizontal parallelism, the top view of trapezoidal phase change plate 1 is shown.

[0020] Figure 7 This is a schematic diagram of the structure of this utility model;

[0021] Figure 8 Taking the fins as an example of intersecting parallel lines, a top view of trapezoidal phase change plate 1 placed in a straight ventilation channel. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0023] like Figures 1 to 4As shown, a trapezoidal phase change plate with fins includes a trapezoidal phase change plate 1, one end of which is W1 and the other end is W2, wherein the length of the W1 end is less than the length of the W2 end. Fins are arranged inside the trapezoidal phase change plate 1, and the fins include transverse fins 2 and longitudinal fins 3. The fins are welded to the interior of the trapezoidal phase change plate 1. The fins have small circular holes, and the number of small circular holes is at least one. After the fins are installed, phase change material is filled in, and then a cap is used to seal the plate to prevent leakage of the phase change material during use. The material of the trapezoidal phase change plate 2 is aluminum, copper, or other thermally conductive materials, and its size is not specifically limited.

[0024] The trapezoidal phase change plate 1 has a certain slope ratio of 1.5. The slope ratio of the front and rear of the trapezoidal phase change plate can be adjusted according to actual needs to adapt to different cooling scenarios, further optimize the thermal performance of the phase change plate, and improve the reliability and energy efficiency of the entire temperature control system.

[0025] The width of the fins is the same as the thickness of the trapezoidal phase change plate 1. The fins include transverse fins 2 and longitudinal fins 3. The material of the fins is selected from stainless steel, aluminum, copper, and new thermally conductive polymer materials. The shape of the fins can be designed as an irregular structure, such as wavy or sawtooth. There is no specific limit to the number of fins 3 in the trapezoidal phase change plate. It needs to be designed according to the specific situation.

[0026] like Figure 5 As shown, the fins are arranged in the trapezoidal phase change plate 1 in the following ways: the transverse fins 2 are arranged in parallel horizontally, the longitudinal fins 3 are arranged in parallel vertically, or the transverse fins 2 and the longitudinal fins 3 are arranged in an alternating manner. When the fins are arranged in the transverse parallel manner, the length of the transverse fins 2 is less than or equal to the length of the trapezoidal phase change plate 1. When the fins are arranged in the longitudinal parallel manner, the length of the longitudinal fins 3 is less than or equal to the width of the trapezoidal phase change plate. When the fins are arranged in the alternating manner, the length of the transverse fins 2 and the longitudinal fins 3 is determined by considering both the transverse and vertical parallel arrangements. Furthermore, the intersection of the transverse fins 2 and the longitudinal fins 3 is connected by welding. Alternatively, the fins can be arranged at an angle, depending on the specific circumstances.

[0027] like Figure 7 and Figure 8As shown, a phase change heat storage and exchange airflow channel includes a straight ventilation channel 4. The straight ventilation channel 4 is made of high-strength, corrosion-resistant materials such as stainless steel, aluminum, and carbon fiber. A fan 5 and a phase change plate segment 6 are sequentially arranged in the airflow direction of the straight ventilation channel 4. A trapezoidal phase change plate with fins, as described above, is arranged side-by-side in the phase change plate segment 6 along the airflow direction. The W1 end of the trapezoidal phase change plate 1 is closer to the fan 5. Based on the phenomenon that the W1 end of the trapezoidal phase change plate 1 in the straight ventilation channel 4 preferentially contacts the high-temperature hot air, and the phase change material at the W1 end melts preferentially compared to the W2 end, this trapezoidal phase change plate 1 effectively solves the problem of uneven melting of the phase change material, which damages the plate and leads to low heat storage and release efficiency and unstable thermal performance. Simultaneously, the fins in the trapezoidal phase change plate 1 indirectly increase the contact area between the hot air and the phase change plate, improving the heat transfer efficiency of the phase change plate and effectively reducing the air temperature.

[0028] The fan 5 is located at the entrance of the direct ventilation duct 4. The fan 5 is fixed to the metal protective plate of the direct ventilation duct with self-tapping screws after holes are drilled. A filter screen is installed on the fan 5 to prevent dust and insects from entering the direct ventilation duct 4 with the airflow. Shock-absorbing pads or rubber pads are also added to the fan 5. The fan 5 can be one of an axial flow fan, a centrifugal fan, an exhaust fan, or a small DC fan. If necessary, a cooling module can be added behind the fan 5.

[0029] The trapezoidal phase change plates 1 are evenly arranged within the phase change plate segment 6. The spacing between adjacent trapezoidal phase change plates 1 is 4cm. The design can be based on the size of the phase change plate segment 6, and the position and spacing of the trapezoidal phase change plates 1 can be reasonably arranged. The distance between two adjacent plates can be adjusted within a reasonable range.

[0030] The following provides two embodiments, in which the use and number of transverse fins 2 and longitudinal fins 3, and the slope ratio of the trapezoidal phase change plate 1 are only illustrative examples. The specific use should be based on the size of the trapezoidal phase change plate 1 and the actual heat transfer effect required, and therefore should not be construed as a limitation of the present invention.

[0031] Example 1

[0032] In data centers, traditional heat dissipation technologies remain dominant but face bottlenecks, struggling to maintain normal operating temperatures under extreme conditions. Given the high and consistently stable heat generation of data center servers, a phase change material (PCM) with high latent heat of change is selected and well-encapsulated within a trapezoidal PCM plate 1 to efficiently absorb the heat generated by the servers. To further address the issue of the PCM plate's front end preferentially contacting hot air within a direct ventilation channel, causing the front PCM to melt faster than the rear, resulting in uneven melting, a trapezoidal PCM plate 1 with a slope ratio of 1.5 is used. This effectively prevents uneven melting of the internal PCM, which leads to low energy storage and heat release efficiency and unstable thermal performance. The length and width of the horizontal fins 2 and vertical fins 3 are flexibly adjusted according to the corresponding cross-sectional thickness of the trapezoidal PCM plate 1 to adapt to optimal heat dissipation. The installation method for the horizontal fins 2 and vertical fins 3 can be referenced. Figure 5 .

[0033] The transverse fins 2 and longitudinal fins 3 are made of aluminum, which has good thermal conductivity and is lightweight, reducing installation costs. The trapezoidal phase change plate 1 is made of a material that does not damage the phase change material. With proper encapsulation technology to ensure that the phase change material is not leaked, the trapezoidal phase change plate is filled and then sealed. Otherwise, a cap can be used to fill the phase change material.

[0034] Example 2

[0035] In industrial machinery (such as CNC and injection molding machines), temperature rises due to motor operation, hydraulic systems, and cutting friction often pose a potential threat to equipment operation. The direct ventilation heat exchange system channel should be installed rationally according to the location of various heat-generating components. There should be an unobstructed air intake space of at least 30cm in front of the fan 5, and the installation height should not be too low to avoid dust or moisture intake. Changing the slope ratio of the trapezoidal phase change plate 1 to 1.5 can optimize the direct ventilation channel 4. In this scenario, the noise reduction requirement for the fan 5 is not high, and the noise reduction requirements for the fan 5 can be appropriately reduced.

[0036] Meanwhile, to ensure a tight fit between the trapezoidal phase change plate 1 and the straight ventilation channel 4, and to enhance the overall heat dissipation effect, a layer of high thermal conductivity thermal grease can be applied between the trapezoidal phase change plate 1 and the channel wall. This not only fills the tiny gaps and reduces thermal resistance, but also improves heat transfer efficiency. Furthermore, considering the complexity and diversity of industrial machinery, the number of transverse fins 2 and longitudinal fins 3 can be increased or decreased according to the actual heat generation of the equipment to optimize the heat dissipation effect. Additionally, to accommodate heat-generating components of different shapes and sizes, adjustable supports and fixing devices can be designed to ensure that the trapezoidal phase change plate 1 fits tightly against the heat-generating component, achieving more effective heat dissipation.

[0037] 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 trapezoidal phase change plate containing fins, characterized in that: The trapezoidal phase change plate (1) is included, with one end of the trapezoidal phase change plate (1) being the W1 end and the other end being the W2 end, wherein the length of the W1 end is less than the length of the W2 end. Fins are arranged inside the trapezoidal phase change plate (1), and the fins include transverse fins (2) and longitudinal fins (3). The fins are connected to the interior of the trapezoidal phase change plate (1) by welding.

2. The trapezoidal phase change plate containing fins according to claim 1, characterized in that: The trapezoidal phase change plate (1) has a certain slope ratio, which is 1.

5.

3. A trapezoidal phase change plate containing fins according to claim 1, characterized in that: The fin has at least one small circular hole.

4. A trapezoidal phase change plate containing fins according to claim 1, characterized in that: The width of the fin is the same as the thickness of the trapezoidal phase change plate (1). The fin is arranged in the trapezoidal phase change plate (1) in the following ways: the transverse fins (2) are arranged in parallel in the transverse direction, or the longitudinal fins (3) are arranged in parallel in the longitudinal direction, or the transverse fins (2) and the longitudinal fins (3) are arranged alternately.

5. A trapezoidal phase change plate with fins according to claim 4, characterized in that: When the transverse fins (2) and longitudinal fins (3) are arranged alternately inside the trapezoidal phase change plate, the intersecting parts of the transverse fins (2) and longitudinal fins (3) are connected by welding.

6. A phase change heat storage and exchange airflow channel, characterized in that: It includes a direct ventilation channel (4), in which a fan (5) and a phase change plate section (6) are arranged in sequence along the airflow direction. A trapezoidal phase change plate with fins as described in any one of claims 1-5 is arranged side by side along the airflow direction in the phase change plate section (6), and the W1 end of the trapezoidal phase change plate (1) is close to the end of the fan (5).

7. A phase change heat storage and exchange airflow channel according to claim 6, characterized in that: The fan (5) is located at the entrance of the direct ventilation channel (4), and a filter screen is installed on the fan (5).

8. A phase change heat storage and exchange airflow channel according to claim 6, characterized in that: The trapezoidal phase change plates (1) are evenly arranged in the phase change plate segment (6), and the spacing between adjacent trapezoidal phase change plates (1) is 4cm. The surface of the trapezoidal phase change plates (1) is coated with a functional coating.

9. A phase change heat storage and exchange airflow channel according to claim 7, characterized in that: A shock-absorbing pad or rubber pad is also provided at the fan (5). The fan (5) is one of the following: axial flow fan, centrifugal fan, exhaust fan, or small DC fan.

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