Fin structure and fan coil

Abstract

The application provides a fin structure and a fan coil. The fin structure comprises at least one fin body, and the fin body comprises a plurality of windowed fins and a plurality of open-bridge fins. The fin body forms a main plane arranged horizontally along the direction of gas flow, the windowed fins are arranged obliquely relative to the main plane, and the open-bridge fins are arranged horizontally relative to the main plane. The windowed fins comprise at least one arc-shaped fin, and the cross section of the arc-shaped fin is arc-shaped. The application guides the air to flow in the upper and lower channels of the fin body by arranging the windowed fins and the open-bridge fins, thereby effectively enhancing the heat exchange effect of the fin structure. Meanwhile, the drainage effect of the fin body can be enhanced by arranging the at least one arc-shaped fin, and the heat exchange performance under the wet working condition can be improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and in particular to finned structures and fan coil units. Background Technology

[0002] Fan coil units are a core component of central air conditioning systems, primarily responsible for regulating indoor temperature and humidity to provide a comfortable indoor environment. Through the forced circulation of the fan, air is continuously guided through the fan coil unit. The unit achieves continuous air recirculation, allowing the air to be cooled (or heated) after passing through the chilled (or hot) water coil, thus ensuring a stable room temperature. Heat exchange occurs between the fluid flowing in the heat exchange tubes and the fluid flowing between the fins. The fins are typically flat with open fins to improve the heat exchange efficiency between the refrigerant and the air.

[0003] However, in existing fin structures, only ventilated fins are used, resulting in a strong gas flow boundary layer. The airflow within the channels of the fin body lacks guidance, leading to significant airflow resistance. Furthermore, in colder environments, condensate generated inside the fins is difficult to drain, thus affecting the heat exchange efficiency.

[0004] Therefore, it is necessary to provide an improved fin structure and fan coil unit to solve the above problems. Utility Model Content

[0005] This application provides a finned structure and a fan coil unit with high heat exchange efficiency and good heat exchange performance.

[0006] This application provides a fin structure, including: at least one fin body, the fin body including a plurality of windowed fins and a plurality of bridging fins, the fin body forming a main plane that is straight along the gas flow direction, the windowed fins being inclined relative to the main plane, and the bridging fins being horizontally arranged relative to the main plane; the windowed fins including at least one arc-shaped fin, the arc-shaped fin having an arc-shaped cross-section.

[0007] Furthermore, the fin body has a symmetrical structure along the gas flow direction, wherein one of the bridging fins is located on the symmetrical plane of the fin body; the heights of the plurality of bridging fins are close and they are located above the plurality of windowed fins.

[0008] Furthermore, the windowed fin includes at least one flat fin with a straight cross-section.

[0009] Furthermore, each of the bridging fins has a window fin on both sides; the window fins on both sides of the same bridging fin have the same cross-sectional shape and opposite inclination directions.

[0010] Furthermore, the plurality of open-bridge fins include flat bridge fins and arc-shaped bridge fins, wherein the cross-section of the flat bridge fin is a straight line; the cross-section of the arc-shaped bridge fin is arc-shaped; and the open-bridge fin located on the plane of symmetry of the fin body is a flat bridge fin.

[0011] Furthermore, the arc-shaped fin includes a first arc-shaped fin and a second arc-shaped fin, the flat fin includes a first flat fin and a second flat fin, and the arc-shaped bridge fin includes a first arc-shaped bridge fin; along the gas flow direction, the first arc-shaped fin, the first flat fin, the first arc-shaped bridge fin, the second flat fin, and the second arc-shaped fin are arranged sequentially from the outside to the inside; the second arc-shaped fin is disposed on one side of the bridge fin located on the symmetrical plane of the fin body.

[0012] Furthermore, the first arc-shaped fin and the second arc-shaped fin, as well as the first flat fin and the second flat fin, are symmetrically arranged relative to the first arc-shaped bridge fin; the cross-section of the first arc-shaped bridge fin is an arc shape with the middle section sunken and the two ends curved upward.

[0013] Furthermore, the first arc-shaped fin has an arc shape that arches upward in the middle; along the gas flow direction, the air inlet side of the first arc-shaped fin is higher than its air outlet side, and the air inlet side of the first flat fin is higher than its air outlet side; the first flat fin is located above the first arc-shaped fin.

[0014] Furthermore, a through hole is provided in the center of the fin body, and a sleeve is provided in the through hole. The sleeve protrudes above the fin body. The sleeve includes a sleeve body, a base provided at the bottom of the sleeve body, and a flange provided at the upper edge of the sleeve body.

[0015] This application also provides a fan coil unit, including multiple fin structures as described above, wherein the multiple fin structures are stacked sequentially along a direction perpendicular to the gas flow direction.

[0016] This application enhances the heat exchange effect of the fin structure by incorporating windowed and bridging fins to guide airflow within the upper and lower channels of the fin body. Simultaneously, the inclusion of at least one arc-shaped fin improves drainage, thus enhancing heat exchange performance under humid conditions. Attached Figure Description

[0017] Figure 1 This is a side view of a plurality of fin structures stacked together in an exemplary embodiment of this application.

[0018] Figure 2 yes Figure 1 A side view of the fin body of the fin structure shown.

[0019] Figure 3yes Figure 2 The diagram shows the gas flow on the fin body.

[0020] Figure 4 This is a top view of the fin structure of this application.

[0021] Figure 5 yes Figure 4 A magnified view of a portion of the fin structure shown.

[0022] Figure 6 yes Figure 5 The top view of the smallest unit of the finned structure shown.

[0023] Figure 7 yes Figure 5 A schematic diagram of gas flow on the finned structure shown.

[0024] Explanation of icon numbers

[0025] 10. Fin body; 100. Main plane; 101. Through hole; 102. Tube sleeve; 1021. Tube sleeve body; 1022. Base; 1023. Flanged edge; 20. Windowed fin; 21. Arc-shaped fin; 211. First arc-shaped fin; 212. Second arc-shaped fin; 213. Third arc-shaped fin; 214. Fourth arc-shaped fin; 22. Flat fin; 221. First flat fin; 222. Second flat fin; 223. Third flat fin; 224. Fourth flat fin; 30. Open bridge fin; 31. Flat bridge fin; 311. Center plane; 32. Arc-shaped bridge fin; 321. First arc-shaped bridge fin; 322. Second arc-shaped bridge fin. Detailed Implementation

[0026] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0028] See Figures 1 to 3As shown, this application provides a fin structure including at least one fin body 10. The fin body 10 includes a plurality of windowed fins 20 and a plurality of bridging fins 30. The fin body 10 forms a straight main plane 100 along the gas flow direction. The windowed fins 20 are inclined relative to the main plane 100, and the bridging fins 30 are horizontally arranged relative to the main plane 100. In the embodiments of this application, the gas flow direction is from the air inlet side to the air outlet side of the fin body 10, i.e., as shown in the figure. Figure 1 The direction of the arrow in the image.

[0029] Please also see Figures 4 to 6 As shown, a through hole 101 is provided at the center of the fin body 10, and a sleeve 102 is provided inside the through hole 101. The sleeve 102 protrudes above the fin body 10. The sleeve 102 and the through hole 101 are coaxially arranged. A heat exchange tube (not shown) is provided inside the sleeve 102 and the through hole 101. The fin body 10 has a symmetrical structure along the gas flow direction.

[0030] The sleeve 102 includes a sleeve body 1021, a base 1022, and a flange 1023. The base 1022 is located at the bottom of the sleeve body 1021. The base 1022 is a circular boss formed at the bottom of the sleeve body 1021 and is connected to the edges of the window fin 20 and the bridge fin 30 near the through hole 101. The flange 1023 is located at the upper edge of the sleeve body 1021. The flange 1023 is perpendicular to the outer wall of the sleeve body 1021.

[0031] According to embodiments of this application, the fin body 10 may be made of aluminum-magnesium alloy or copper-aluminum composite material. Furthermore, a hydrophobic coating may be applied to the fin body 10.

[0032] The vented fin 20 includes at least one arc-shaped fin 21 and at least one flat fin 22. The arc-shaped fin 21 has an arc-shaped cross-section, which guides condensate to flow along its curved surface, reducing water accumulation and improving wet-condition performance. The flat fin 22 has a straight cross-section, which facilitates stamping and reduces processing difficulty.

[0033] Each bridging fin 30 has a window fin 20 on both sides. The window fins 20 on both sides of the same bridging fin 30 have the same cross-sectional shape and opposite inclination directions, which can counteract the pressure difference caused by the unidirectional inclination of the window fin 20 and stabilize the flow field. The multiple bridging fins 30 are close in height and located above the multiple window fins 20. The highest points of the multiple bridging fins 30 are at the same height to ensure a smooth airflow transition and reduce abrupt drag. At the same time, the bridging fins 30, which are located higher than the window fins 20, can prevent condensate retention.

[0034] Multiple open-bridge fins 30 include flat bridge fins 31 and curved bridge fins 32. The cross-section of the flat bridge fin 31 is straight. The cross-section of the curved bridge fin 32 is curved. One of the open-bridge fins 30 is located on the plane of symmetry of the fin body 10. The plane of symmetry ensures uniform airflow resistance on both sides, avoiding localized overheating caused by flow deviation. The open-bridge fin 30 located on the plane of symmetry of the fin body 10 is the flat bridge fin 31.

[0035] The arc-shaped fin 21 includes a first arc-shaped fin 211 and a second arc-shaped fin 212. The flat fin 22 includes a first flat fin 221 and a second flat fin 222. The arc-shaped bridge fin 32 includes a first arc-shaped bridge fin 321. Along the gas flow direction, the first arc-shaped fin 211, the first flat fin 221, the first arc-shaped bridge fin 321, the second flat fin 222, and the second arc-shaped fin 212 are arranged sequentially from the outside to the inside. The second arc-shaped fin 212 is located on one side of the open-bridge fin 30 located on the plane of symmetry of the fin body 10.

[0036] The arc-shaped fin 21 includes a third arc-shaped fin 213 and a fourth arc-shaped fin 214. The flat fin 22 includes a third flat fin 223 and a fourth flat fin 224. The arc-shaped bridge fin 32 includes a second arc-shaped bridge fin 322. Along the gas flow direction, the third arc-shaped fin 213, the third flat fin 223, the second arc-shaped bridge fin 322, the fourth flat fin 224, and the fourth arc-shaped fin 214 are arranged sequentially from the inside to the outside. The third arc-shaped fin 213 is located on the other side of the open-bridge fin 30, which is located on the plane of symmetry of the fin body 10.

[0037] The first arc-shaped fin 211 has an upward-arching cross-section, with the center of the arc located below the main plane 100. Along the gas flow direction, the inlet side of the first arc-shaped fin 211 is higher than its outlet side. The height difference between the inlet and outlet sides of the first arc-shaped fin 211 ranges from 0.1 mm to 0.8 mm.

[0038] The inlet side of the first flat plate fin 221 is higher than its outlet side. The first flat plate fin 221 is located above the first arc-shaped fin 211. The tilt direction of the first flat plate fin 221 is consistent with the bending direction of the first arc-shaped fin 211. The angle between the first flat plate fin 221 and the main plane 100 ranges from 18° to 30°.

[0039] The first arc-shaped bridge fin 321 has a cross-section that is downward in the middle and upward at both ends, with the center of the arc located above the main plane 100. The first arc-shaped bridge fin 321 bends downward towards the main plane 100 and then upward along the gas flow direction. The height difference between the highest and lowest points of the first arc-shaped bridge fin 321 ranges from 0.1 mm to 0.8 mm.

[0040] The second flat plate fin 222 and the first flat plate fin 221 are symmetrically arranged relative to the first arc-shaped bridge fin 321. The inclination direction of the second flat plate fin 222 is opposite to that of the first flat plate fin 221. The air inlet side of the second flat plate fin 222 is lower than its air outlet side. The angle between the second flat plate fin 222 and the main plane 100 ranges from 18° to 30°.

[0041] According to the embodiments of this application, the second flat plate fin 222 and the first flat plate fin 221 may not be completely symmetrical with respect to the first arc-shaped bridge fin 321. Specifically, the second flat plate fin 222 and the first flat plate fin 221 are symmetrical in tilt angle and tilt direction with respect to the first arc-shaped bridge fin 321, but the fin lengths of the second flat plate fin 222 and the first flat plate fin 221 are different.

[0042] The second arc-shaped fin 212 has an upward-arching cross-section, with the center of the arc located below the main plane 100. The second arc-shaped fin 212 and the first arc-shaped fin 211 can be symmetrically arranged relative to the first arc-shaped bridge fin 321. The air inlet side of the second arc-shaped fin 212 is lower than its air outlet side. The second arc-shaped fin 212 is located below the second flat fin 222. Along the gas flow direction, the height difference between the air inlet and outlet sides of the second arc-shaped fin 212 ranges from 0.1 mm to 0.8 mm.

[0043] According to the embodiments of this application, the second arc-shaped fin 212 and the first arc-shaped fin 211 may not be completely symmetrical with respect to the first arc-shaped bridge fin 321. Specifically, the second arc-shaped fin 212 and the first arc-shaped fin 211 are symmetrical in tilt angle and tilt direction with respect to the first arc-shaped bridge fin 321, but the fin lengths of the second arc-shaped fin 212 and the first arc-shaped fin 211 are different.

[0044] The flat bridge fin 31 is parallel to the gas flow direction. The width of the flat bridge fin 31 along the gas flow direction ranges from 0.3 mm to 1.5 mm. Along the height direction of the fin body 10, the distance between the flat bridge fin 31 and the top of the second arc-shaped fin 212 and the third arc-shaped fin 213 ranges from 0.4 mm to 1 mm. The middle surface of the flat bridge fin 31, perpendicular to the gas flow direction, is the center surface 311, and the fin body 10 is symmetrically distributed along the gas flow direction relative to the center surface 311.

[0045] The third arc-shaped fin 213 has an upward-arching cross-section, with the center of the arc located below the main plane 100. The third arc-shaped fin 213 and the second arc-shaped fin 212 are symmetrically arranged relative to the flat bridge fin 31. The inlet side of the third arc-shaped fin 213 is higher than its outlet side. Along the gas flow direction, the height difference between the inlet and outlet sides of the third arc-shaped fin 213 ranges from 0.1 mm to 0.8 mm.

[0046] The third flat plate fin 223 and the second flat plate fin 222 are symmetrically arranged relative to the flat bridge fin 31. The inclination direction of the third flat plate fin 223 is the same as the bending direction of the third arc-shaped fin 213. The air inlet side of the third flat plate fin 223 is higher than its air outlet side. The third flat plate fin 223 is located above the third arc-shaped fin 213. The angle between the third flat plate fin 223 and the main plane 100 ranges from 18° to 30°.

[0047] The cross-section of the second arc-shaped bridge fin 322 is an arc shape with a downward slope in the middle and upward curves at both ends, with the center of the arc located above the main plane 100. The second arc-shaped bridge fin 322 bends downwards and then upwards along the gas flow direction. The height difference between the highest and lowest points of the second arc-shaped bridge fin 322 ranges from 0.1 mm to 0.8 mm. The second arc-shaped bridge fin 322 and the first arc-shaped bridge fin 321 are symmetrically arranged relative to the flat bridge fin 31.

[0048] The fourth flat plate fin 224 and the third flat plate fin 223 are symmetrically arranged with respect to the second arc-shaped bridge fin 322. The fourth flat plate fin 224 and the first flat plate fin 221 are symmetrically arranged with respect to the flat bridge fin 31. The inclination direction of the fourth flat plate fin 224 is opposite to that of the first flat plate fin 221. The air inlet side of the fourth flat plate fin 224 is lower than its air outlet side. The angle between the fourth flat plate fin 224 and the main plane 100 ranges from 18° to 30°.

[0049] According to the embodiments of this application, the fourth flat plate fin 224 and the third flat plate fin 223 may not be completely symmetrical with respect to the second arc-shaped bridge fin 322. Specifically, the fourth flat plate fin 224 and the third flat plate fin 223 are symmetrical in tilt angle and direction with respect to the second arc-shaped bridge fin 322, but the fin lengths of the fourth flat plate fin 224 and the third flat plate fin 223 are different.

[0050] The fourth arc-shaped fin 214 has an upward-arching cross-section, with the center of the arc located below the main plane 100. The fourth arc-shaped fin 214 and the third arc-shaped fin 213 are symmetrically arranged relative to the second arc-shaped bridge fin 322. The fourth arc-shaped fin 214 and the first arc-shaped fin 211 are symmetrically arranged relative to the flat bridge fin 31. The inlet side of the fourth arc-shaped fin 214 is lower than its outlet side. The fourth arc-shaped fin 214 is located below the fourth flat plate fin 224. Along the gas flow direction, the height difference between the inlet and outlet sides of the fourth arc-shaped fin 214 ranges from 0.1 mm to 0.8 mm.

[0051] According to the embodiments of this application, the fourth arc-shaped fin 214 and the third arc-shaped fin 213 may not be completely symmetrical with respect to the second arc-shaped bridge fin 322. Specifically, the fourth arc-shaped fin 214 and the third arc-shaped fin 213 are symmetrical in their tilt angle and tilt direction with respect to the second arc-shaped bridge fin 322, but the fin lengths of the fourth arc-shaped fin 214 and the third arc-shaped fin 213 are different.

[0052] See Figure 3 and Figure 7 The diagram shows the airflow through the channel formed by the windowed fin 20 and the bridged fin 30. This application utilizes an alternating arrangement of curved fins 21, flat fins 22, flat bridge fins 31, and curved bridge fins 32 to create two sinusoidal wave channels (e.g., Figure 3 The forced airflow moving up and down within the channel enhances the disturbance, disrupts the flow boundary layer, and effectively enhances the heat transfer capacity.

[0053] According to the embodiments of this application, the lengths of the arc-shaped fin 21, the flat fin 22, the flat bridge fin 31, and the arc-shaped bridge fin 32 are determined by the radius of the base 1022. The radius of the base 1022 and the inner radius of the sleeve body 1021 are both greater than 1 mm.

[0054] The fin body 10 of this application adopts a hybrid structure of arc-shaped fins 21, flat fins 22, flat bridge fins 31, and arc-shaped bridge fins 32, optimizing the length of the arc-shaped fins 21, flat fins 22, flat bridge fins 31, and arc-shaped bridge fins 32, as well as the size of the base 1022. The airflow velocity near the heat exchange tube increases, and more air flows through the heat exchange tube passing through the fin body 10, enhancing the heat exchange between the air and the heat exchange tube, thus effectively improving the heat exchange efficiency.

[0055] This application also provides a fan coil unit, including multiple fin structures as described above, which are stacked sequentially along a direction perpendicular to the gas flow. The multiple fin structures are aligned by multiple sleeves 102 and fixed to each other by their flanges 1023.

[0056] This application, by setting up windowed fins 20 and bridging fins 30, guides air to flow within the upper and lower channels of the fin body 10, effectively enhancing the heat exchange effect of the fin structure. Simultaneously, by setting up at least one arc-shaped fin 21, the drainage effect of the fin body 10 can be enhanced, which is beneficial for improving heat exchange performance under humid conditions.

[0057] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A finned structure, characterized in that, include: At least one fin body, the fin body including multiple windowed fins and multiple bridging fins, the fin body forming a main plane that is straight along the gas flow direction, the windowed fins being inclined relative to the main plane, and the bridging fins being horizontal relative to the main plane; the windowed fins including at least one arc-shaped fin, the arc-shaped fin having an arc-shaped cross-section.

2. The fin structure according to claim 1, characterized in that, The fin body has a symmetrical structure along the gas flow direction, wherein one of the bridging fins is located on the symmetrical plane of the fin body; the heights of the plurality of bridging fins are close and they are located above the plurality of windowed fins.

3. The fin structure according to claim 2, characterized in that, The vented fin includes at least one flat fin, the cross-section of which is straight.

4. The fin structure according to claim 2, characterized in that, Each of the bridging fins has a window fin on both sides; the window fins on both sides of the same bridging fin have the same cross-sectional shape and opposite inclination directions.

5. The fin structure according to claim 3, characterized in that, The plurality of open-bridge fins include flat bridge fins and arc-shaped bridge fins. The cross-section of the flat bridge fin is a straight line; the cross-section of the arc-shaped bridge fin is arc-shaped; and the open-bridge fin located on the plane of symmetry of the fin body is a flat bridge fin.

6. The fin structure according to claim 5, characterized in that, The arc-shaped fin includes a first arc-shaped fin and a second arc-shaped fin; the flat fin includes a first flat fin and a second flat fin; and the arc-shaped bridge fin includes a first arc-shaped bridge fin. Along the gas flow direction, the first arc-shaped fin, the first flat fin, the first arc-shaped bridge fin, the second flat fin, and the second arc-shaped fin are arranged sequentially from the outside to the inside. The second arc-shaped fin is located on one side of the bridge fin, which is situated on the symmetrical plane of the fin body.

7. The fin structure according to claim 6, characterized in that, The first arc-shaped fin, the second arc-shaped fin, the first flat fin, and the second flat fin are all symmetrically arranged relative to the first arc-shaped bridge fin; the cross-section of the first arc-shaped bridge fin is an arc shape with the middle section sunken and the two ends curved upward.

8. The fin structure according to claim 7, characterized in that, The first arc-shaped fin has an arc shape that arches upward in the middle; along the gas flow direction, the air inlet side of the first arc-shaped fin is higher than its air outlet side, and the air inlet side of the first flat fin is higher than its air outlet side; the first flat fin is located above the first arc-shaped fin.

9. The fin structure according to claim 1, characterized in that, The fin body has a through hole at its center, and a sleeve is provided inside the through hole. The sleeve protrudes above the fin body. The sleeve includes a sleeve body, a base at the bottom of the sleeve body, and a flange at the upper edge of the sleeve body.

10. A fan coil unit, characterized in that, It includes multiple fin structures as described in any one of claims 1-9, wherein the multiple fin structures are stacked sequentially along a direction perpendicular to the gas flow direction.

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