Fin structure and air conditioner

Abstract

The invention discloses a fin structure and an air conditioner in the technical field of ventilation devices, the fin structure comprises a windward side and a leeward side which are oppositely arranged, when a fin is used, the windward side faces the incoming flow direction, the fin is provided with a plurality of pipe holes, the pipe holes extend in the length direction of the fin, the pipe holes comprise common pipe holes located in the two sides of the width direction of the fin, and the common pipe holes are communicated with the leeward side. The common pipe holes located in the two sides are distributed in a staggered mode, the hole center connecting line corresponding to every two adjacent common pipe holes located in the two sides serves as a hole straight line, a plurality of single pipe holes are evenly formed in each hole straight line, and the included angle between every two adjacent hole straight lines ranges from 60 degrees to 150 degrees. By optimizing and adjusting the arrangement mode of the finned tube holes, when the space size of the heat exchanger in the vertical windward direction is limited, the heat exchange capacity can be improved without increasing the number of rows of the fins of the heat exchanger, and the cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of ventilation device technology, specifically to a finned structure and an air conditioner. Background Technology

[0002] In existing air conditioning systems, finned heat exchangers typically have a fixed installation space, particularly in the space perpendicular to the airflow direction, but without strict limitations on the space parallel to the airflow direction. Therefore, to increase heat exchange capacity, when a single-row heat exchanger is insufficient, double-row or even multi-row heat exchangers can be installed. The fins have a windward and leeward side. During operation, the windward side faces the airflow direction, while the leeward side is positioned opposite, perpendicular to the airflow direction. Multiple tube holes are provided on the fins, extending along the length of the fins and vertically spaced. Due to the dimensional limitations in the height direction, when using two rows of heat exchangers, the unavoidable gaps between rows mean that even with various techniques to optimize the fin slot design to enhance heat exchange efficiency on the outside air side, this only improves the efficiency of a single row. Heat transfer between rows cannot be achieved through the fins; often, only the first row of fins on the windward side has the highest heat exchange efficiency, while the efficiency of the subsequent rows decreases significantly. Summary of the Invention

[0003] To overcome the problem of low heat exchange efficiency in existing finned heat exchangers with multiple rows due to vertical dimension limitations, this invention provides a finned structure and an air conditioner.

[0004] The technical solution adopted by this invention to solve its technical problem is: The fin structure includes a windward and leeward side arranged opposite each other. When in use, the windward side faces the direction of the incoming flow. The fin has multiple tube holes that extend along the length of the fin. The tube holes include common tube holes located on both sides of the fin width direction. The common tube holes on both sides are staggered. The line connecting the centers of two adjacent common tube holes on both sides is the straight line of the hole. Several single tube holes are evenly arranged on each straight line of the hole. The included angle between two adjacent straight lines of the hole is 60°-150°.

[0005] In this application, by optimizing and adjusting the arrangement of finned tube holes, the heat exchange capacity can be improved without increasing the number of fin rows in the heat exchanger when the space size of the heat exchanger in the vertical windward direction is limited, and the cost can also be reduced.

[0006] In some embodiments, two adjacent hole lines are grouped together, and each group of hole lines is configured to be symmetrical about the horizontal plane.

[0007] In some embodiments, two adjacent hole lines are grouped together, and the hole lines with the same inclination direction in different groups are parallel.

[0008] In some embodiments, the included angle between two adjacent hole lines is 80°-100°.

[0009] In some embodiments, the common tubes located on both sides of the fin width direction are configured such that each is staggered on both sides or every two are staggered on both sides.

[0010] In some embodiments, the windward and leeward sides of the fins can be configured as rectangular or wavy surfaces. When configured as wavy surfaces, the downward extension trend of the wavy surfaces varies with the extension trend of the line connecting the centers of adjacent tube holes.

[0011] In some embodiments, the windward and leeward sides of the fins have the same shape, and when the windward side is translated along the direction of the incoming flow, the windward and leeward sides can overlap.

[0012] In some embodiments, it is assumed that there is a straight line d in the same direction as the incoming flow, the intersection of the straight line d and the windward side is M, the intersection of the straight line d and the hole line is O, and the intersection of the straight line d and the leeward side is N; when the windward side is a rectangular surface, the ratio of the line segment lengths of MO to MN is 0.2-0.8; when the windward side is a bent wavy surface, the ratio of the line segment lengths of MO to MN is 0.4-0.6.

[0013] In some embodiments, the leeward side of the fin is configured as a bent wavy surface.

[0014] The present invention also provides an air conditioner comprising the fin structure of any of the above embodiments.

[0015] The beneficial effects of this invention are: By optimizing the arrangement of finned tube holes, heat exchange capacity can be improved and costs reduced even when the space in the vertical windward direction of the heat exchanger is limited, without increasing the number of fin rows. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a multi-row finned heat exchanger used in the prior art; Figure 2 This is a schematic diagram of the structure of a first embodiment of the fin structure provided by the present invention; Figure 3 This is a comparison chart of the heat transfer efficiency of Example 1 and the prior art finned structure; Figure 4 for Figure 2 A partially enlarged schematic diagram of the central fin structure; Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the fin structure provided by the present invention; Figure 6 for Figure 5 Enlarged view of a portion of the fin structure Figure 1 ; Figure 7 for Figure 5 Enlarged view of a portion of the fin structure Figure 2 ; Figure 8 This is a schematic diagram of the structure of Embodiment 3 of the fin structure provided by the present invention; Figure 9 for Figure 8 A partially enlarged schematic diagram of the central fin structure; Figure 10 This is a schematic diagram of the structure of Embodiment 4 of the fin structure provided by the present invention; Figure 11 for Figure 10 A partially enlarged schematic diagram of the central fin structure; Figure 12 This is a schematic diagram of the structure of Embodiment 5 of the fin structure provided by the present invention; Figure 13 for Figure 12 Enlarged view of a portion of the fin structure Figure 1 ; Figure 14 for Figure 12 Enlarged view of a portion of the fin structure Figure 2 .

[0017] The diagram is marked as follows: 1 - Line A, 2 - Line B, 3 - Common pipe hole, 4 - Single pipe hole, 5 - Windward profile line, 6 - Leeward profile line, 7 - Line C. Detailed Implementation

[0018] The invention will be further described below with reference to the accompanying drawings.

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] Example 1 like Figure 1 As shown, this illustrates the existing technology where the installation space of the heat exchanger is fixed, particularly in the space dimension perpendicular to the incoming flow direction, which is from left to right in the figure. Figure 1 The middle section consists of two rows of heat exchangers. In practice, there is a gap between the two rows of heat exchangers, resulting in low heat exchange efficiency.

[0021] like Figure 2 and Figure 4 As shown, the present invention provides a finned structure to improve the heat exchange efficiency of finned heat exchangers when vertical dimensions are limited. Figure 3 This embodiment demonstrates the fin structure and Figure 1 Comparative experimental data on the heat exchange performance of existing technologies in China.

[0022] Reference Figure 2 and Figure 4 The fin structure includes a windward and leeward side arranged opposite each other. When in use, the windward side faces the direction of the incoming flow. In conjunction with the aforementioned windward side facing the direction of the incoming flow, the leeward side is arranged opposite to it and perpendicular to the direction of the incoming flow. The fin has multiple tube holes that extend along the length of the fin. Here, the length of the fin is perpendicular to the inward and outward directions of the fin structure diagram. The fin structure diagram here is a cross-sectional angle view of the tube holes to show the distribution of the tube holes. The side facing the direction of the incoming flow in the figure is the windward outline 5, and the side away from the direction of the incoming flow is the leeward outline 6.

[0023] Specifically, the fins are provided with multiple tube holes that extend along the length of the fins. The tube holes include common tube holes 3 located on both sides of the width of the fins, which are the left and right sides in the figure.

[0024] In practice, heat exchange tubes are connected in series with multiple tube holes.

[0025] In this application, the common tube holes 3 located on both sides of the fin width direction are arranged with straight line C7 as the reference, such as Figure 4 As shown, line C7 is perpendicular to the incoming flow direction. The line connecting the centers of the common pipe hole 3 located on one side of the fin width direction coincides with or is parallel to line C7.

[0026] Furthermore, the common pipe holes 3 located on both sides are staggered, with the line connecting the centers of the two adjacent common pipe holes 3 located on both sides as the hole straight line, and several single pipe holes 4 are evenly arranged on each hole straight line.

[0027] Based on the above, the hole straight line has the following characteristics: Figure 4 The holes are categorized into two main types: straight lines A1 and straight lines B2. Straight line A1 refers to a type of hole straight line that slopes upwards from left to right; straight line B2 refers to a type of hole straight line that slopes downwards from left to right. Based on the aforementioned staggered distribution of the common pipe holes 3 on both sides, and using the line connecting the centers of two adjacent common pipe holes 3 on both sides as the hole straight line, straight lines A1 and B2 will be distributed alternately.

[0028] To ensure a more uniform distribution of the tube holes while balancing cost reduction and improved heat exchange efficiency, it is preferable that the included angle between two adjacent holes be 60°-150°.

[0029] In this application, by optimizing and adjusting the arrangement of finned tube holes, the heat exchange capacity can be improved without increasing the number of fin rows in the heat exchanger when the space size of the heat exchanger in the vertical windward direction is limited, and the cost can also be reduced.

[0030] Furthermore, to achieve a more regular distribution of the tube holes, both to facilitate manufacturing and to optimize the heat exchange effect, the location of the tube holes is further restricted.

[0031] Specifically, two adjacent holes are grouped together, and each group of holes is arranged symmetrically up and down along the horizontal plane.

[0032] Specifically, two adjacent straight holes are grouped together, and straight holes with the same inclination direction within different groups are parallel. The inclination direction of straight holes with the same inclination direction refers to either an upward or downward sloping trend from left to right, as mentioned above. Straight holes with the same inclination direction within different groups are parallel, meaning that multiple straight holes in each of the two main categories, A1 and B2, are parallel.

[0033] In this embodiment, the distance between any two adjacent holes is the same, which is L.

[0034] In this embodiment, all the holes on the fin surface have the same size, and the diameter of the holes is D.

[0035] Preferably, L > 2D.

[0036] The optimal angle between adjacent holes, i.e., for the purpose of optimizing heat transfer efficiency, is... Figure 4 Angle 'a' in the equation is 80°-100°.

[0037] The windward and leeward sides of the fins can be configured as rectangular or bent wavy surfaces.

[0038] When configured as a rectangular surface, it is similar to existing technologies. Figure 1 The fins in the middle have the same windward configuration, and the corresponding outlines and Figure 1 The middle line is vertical.

[0039] When configured as a bent wavy surface, there are two situations: first, in this embodiment, the extension trend of the bent wavy surface from top to bottom changes with the extension trend of the line connecting the centers of adjacent pipe holes; second, the extension trend of the bent wavy surface is not strongly correlated with the extension trend of the line connecting the centers of adjacent pipe holes, as shown in Embodiment 2 below.

[0040] The applicant pointed out that the leeward side of the fins should preferably be designed as a wavy surface, and the downward extension trend of the wavy surface should follow the extension trend of the line connecting the centers of adjacent tube holes. This design can reduce the friction drag of the fins and optimize the heat transfer effect in the vortex zone on the back of the tube holes.

[0041] Furthermore, in this embodiment, the windward and leeward sides of the fins have the same shape, and when the windward side is translated along the direction of the incoming flow, the windward and leeward sides can overlap. This configuration avoids material waste during production and allows for continuous cutting and production.

[0042] Reference Figure 4 As shown, assume there exists a straight line d that is in the same direction as the incoming flow, i.e., the straight line MN in the figure. The intersection of the straight line d and the windward side is M, the intersection of the straight line d and the hole line is O, and the intersection of the straight line d and the leeward side is N.

[0043] In this embodiment, the windward and leeward sides are configured as bent wavy surfaces, and the preferred ratio of the line segment lengths of MO to MN is 0.4-0.6.

[0044] In some embodiments, when the windward and leeward sides are configured as rectangular surfaces, the ratio of the line segment lengths of MO to MN is 0.2-0.8.

[0045] Reference Figure 3 The fin structure in this embodiment is relative to Figure 1 The double-row heat exchanger structure shown is used in the same air duct. The average wind speed of the two schemes is compared under different air duct inlet and outlet pressure differences.

[0046] based on Figure 3 Compared to traditional double-row finned heat exchangers, with the same fin spacing, fin surface shape (planar), and heat exchanger height, within the same air duct, and under the same inlet and outlet pressure difference, the average air velocity of the finned heat exchanger of this application is increased by approximately 40% ± 5%. This increased air velocity results in the highest heat exchange efficiency. Therefore, the finned heat exchanger of this application, when the space in the vertical windward direction of the heat exchanger is limited, improves heat exchange capacity through the arrangement of tube holes. Compared to existing methods using multiple rows of fins, this offers advantages in terms of improved heat exchange efficiency and lower cost.

[0047] Example 2 like Figures 5-7 As shown, the present invention provides a fin structure. The main difference between this embodiment and Embodiment 1 is that the windward and leeward sides of the fins are configured differently.

[0048] As shown in the figure, the downward extension trend of the fins on the windward and leeward sides is not strongly correlated with the extension trend of the line connecting the centers of adjacent tube holes.

[0049] Reference Figure 7 Along the direction of the incoming flow, there are multiple intersection points with the windward profile line 5 and the leeward profile line 6. YP1, YP2, and YP3 on the windward profile line 5 correspond to BP1, BP2, and BP3 on the leeward profile line 6, respectively. The line segments connecting YP1 and BP1, YP2 and BP2, and YP3 and BP3 are all of equal length.

[0050] Example 3 like Figure 8 and Figure 9 As shown, the present invention provides a fin structure. The main difference between this embodiment and Embodiment 1 is that the number of single tube holes 4 arranged on the straight line of each hole is different.

[0051] In Embodiment 1, a single-tube hole 4 is provided in the middle of the straight line of each hole. In this embodiment, two single-tube holes 4 are evenly provided in the straight line of each hole.

[0052] Example 4 Reference Figure 10 and Figure 11 The present invention provides a fin structure. The main difference between this embodiment and embodiment one is that in embodiment one, the common tube holes 3 located on both sides of the fin width direction are configured to be staggered on both sides; in this embodiment, the common tube holes 3 located on both sides of the fin width direction are configured to be staggered on both sides.

[0053] Example 5 Reference Figures 12-14 The present invention provides a fin structure. The main difference between this embodiment and Embodiment 1 is that in Embodiment 1, the included angle between adjacent hole lines is consistent, while in this embodiment, the included angle between adjacent hole lines is not completely consistent. (Refer to...) Figure 14 As shown.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fin structure comprising a windward and leeward face arranged opposite each other, wherein the windward face of the fin faces the direction of the incoming flow when in use, and the fin has multiple tube holes extending along the length of the fin, characterized by: The tube hole includes a common tube hole (3) located on both sides of the fin width direction. The common tube holes (3) located on both sides are staggered. The line connecting the center of the two common tube holes (3) located on both sides and adjacent to each other is the hole straight line. Several single tube holes (4) are uniformly arranged on each hole straight line. The included angle between two adjacent hole straight lines is 60°-150°.

2. The fin structure as described in claim 1, characterized in that: Two adjacent holes are grouped together, and each group of holes is arranged symmetrically up and down along the horizontal plane.

3. The fin structure as described in claim 1, characterized in that: Two adjacent holes are grouped together, and the holes in different groups with the same inclination direction are parallel.

4. The fin structure as described in claim 1, characterized in that: The included angle between two adjacent holes is 80°-100°.

5. The fin structure as described in claim 1, characterized in that: The common tube holes (3) located on both sides of the fin width direction are configured such that each one is staggered on both sides or every two are staggered on both sides.

6. The fin structure as described in any one of claims 1-5, characterized in that: The windward and leeward sides of the fins can be configured as rectangular or wavy surfaces. When configured as wavy surfaces, the downward extension trend of the wavy surfaces changes with the extension trend of the line connecting the centers of adjacent pipe holes.

7. The fin structure as described in claim 6, characterized in that: The windward and leeward sides of the fins have the same shape, and when the windward side is moved along the direction of the incoming flow, the windward and leeward sides can overlap.

8. The fin structure as described in claim 7, characterized in that: Suppose there exists a straight line d that is in the same direction as the incoming flow. The intersection of straight line d and the windward side is M, the intersection of straight line d and the hole line is O, and the intersection of straight line d and the leeward side is N. When the windward side is rectangular, the ratio of the line segment lengths of MO to MN is 0.2-0.8; When the windward side is a wavy surface, the ratio of the line segment lengths of MO to MN is 0.4-0.

6.

9. The fin structure as described in claim 6, characterized in that: The leeward side of the fins is configured as a bent wavy surface.

10. An air conditioner, characterized by: It includes the fin structure as described in any one of claims 1-9.

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