Fin and heat exchanger

Abstract

The utility model relates to a fin and a heat exchanger, the fin comprises a first plate body, the first plate body is provided with first opening parts and second opening parts, the first opening parts and the second opening parts are arranged at intervals in the width direction of the first plate body, the number of the first opening parts is multiple, the first opening parts are arranged at intervals in the length direction of the first plate body, and the second opening parts are arranged at intervals in the length direction of the first plate body. A plurality of second opening parts are arranged, and the plurality of second opening parts are arranged at intervals along the length direction of the first plate body; the first plate body further comprises a first drainage groove, the first drainage groove is located between the first hole opening part and the second hole opening part, at least part of the first drainage groove in the length direction extends in the length direction of the first plate body, and the first drainage groove is concaved in one side of the thickness direction of the first plate body. According to the fin, the generated condensate water can be converged and guided, so that the condensate water can be discharged more quickly under the action of gravity and siphon force, and the drainage performance of the fin is improved.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, specifically to a finned heat exchanger for a heat pump. Background Technology

[0002] Commercial modular heat pump chillers, heat pump water heaters, and other low-temperature heat pump outdoor units have high requirements for the heat exchanger's heat exchange performance at low temperatures (below 7 degrees Celsius). Smooth drainage of the heat exchanger fins effectively improves its low-temperature performance. Among related technologies, double-row integrated fins have relatively outstanding heat exchange performance but poor drainage performance. This is because double-row integrated fins are mostly flat, resulting in more dispersed drainage and a slower drainage speed, which affects the heat exchanger's performance at low temperatures when these fins are applied. Utility Model Content

[0003] The first aspect of this application provides a fin that has better drainage performance.

[0004] The fin provided in the first aspect of this application includes a first plate having a plurality of first openings and a plurality of second openings, the first openings and the second openings being arranged at intervals along the width direction of the first plate; the first plate also includes a first drainage groove located between the first openings and the second openings, the length direction of the first drainage groove extending at least partially along the length direction of the first plate, and the first drainage groove being recessed into one side of the thickness direction of the first plate.

[0005] The fin has a first drainage groove between the first opening and the second opening. The first drainage groove is recessed on one side of the first plate in the thickness direction, which can collect and guide the condensate near the first opening and the second opening on the fin, so that the condensate can be discharged more quickly, thereby improving the drainage performance of the fin.

[0006] A second aspect of this application provides a heat exchanger that has better heat exchange performance at low temperatures.

[0007] The heat exchanger provided in the second aspect of this application includes a plurality of fins, a plurality of first heat exchange tubes, and a plurality of second heat exchange tubes. The fins are the same as those provided in the first aspect. The plurality of fins are arranged at intervals. The first heat exchange tubes are disposed in at least a portion of the first opening along the arrangement direction of the fins. The second heat exchange tubes are disposed in at least a portion of the second opening along the arrangement direction of the fins.

[0008] The fins of the heat exchanger are provided by the first party. Because the fins provided by the first party have better drainage performance, the condensate on the fins can be discharged more promptly when the heat exchanger is working, and the heat exchanger has better heat exchange performance at low temperatures. Attached Figure Description

[0009] Figure 1 A schematic diagram of the structure of the fins provided in this application in a first specific embodiment;

[0010] Figure 2 A schematic diagram of the structure of the fins provided in this application in a second specific embodiment;

[0011] Figure 3 for Figure 2 A three-dimensional structural diagram of the fins shown;

[0012] Figure 4 A schematic diagram of the structure of the fins provided in this application in a third specific embodiment;

[0013] Figure 5 A schematic diagram of the structure of the fins provided in this application in the fourth specific embodiment;

[0014] Figure 6 A schematic diagram of the structure of the fins provided in this application in the fifth specific embodiment;

[0015] Figure 7 A schematic diagram of the structure of the fins provided in this application in the sixth specific embodiment;

[0016] Figure 8 A schematic diagram of the structure of the heat exchanger provided in this application in a specific embodiment;

[0017] Figure 9 for Figure 8 A side view of the heat exchanger in the diagram;

[0018] Figure 10 for Figure 8 The diagram shows the installation of the heat exchanger in one operating state.

[0019] Reference numerals: First plate 1, First side 11, Second side 12, First opening 2, First notch 21, First flange 22, First opening 3, First through hole 31, Second flange 32, First drainage groove 4, Second drainage groove 5, Third drainage groove 6, First rib 7, First protrusion 8, Fin 100, First heat exchange tube 200, Second heat exchange tube 300.

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0021] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0022] It should be understood that the described embodiments are merely a part of the technical solutions of this application, and not all of them. All other technical solutions obtained by those skilled in the art based on the technical solutions in this application without inventive effort are within the scope of protection of this application.

[0023] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0025] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0026] like Figure 1-10 As shown, a first aspect of this application provides a fin, which includes a first plate 1. The first plate 1 has a plurality of first openings 2 and a plurality of second openings 3. The first openings 2 and the second openings 3 are arranged at intervals along the width direction of the first plate 1. The first plate 1 also includes a first drainage groove 4, which is located between the first openings 2 and the second openings 3. The length direction of the first drainage groove 4 extends at least partially along the length direction of the first plate 1, and the first drainage groove 4 is recessed into one side of the thickness direction of the first plate 1.

[0027] Specifically, in this embodiment, the first plate 1 is a thin sheet structure. The first opening 2 and the second opening 3 can be formed by stamping on the first plate 1. Similarly, the first drainage groove 4 can also be formed by stamping. The concave direction of the first drainage groove 4 can be either along the thickness direction of the first plate 1. However, to ensure drainage effect and ease of installation, the concave direction of the first drainage grooves 4 among multiple first plates 1 is the same, that is, they all face the same side of the thickness direction of the first plate 1. It should be noted that, under the premise that the first drainage groove 4 is concave within the first plate 1, the concave shape of the first drainage groove 4 can be a straight line, or it can be a groove composed of multiple rhombuses, multiple triangles, or ellipses, as long as the extension direction of the first drainage groove 4 extends approximately along the length direction of the first plate 1. Therefore, this article does not specifically limit the shape of the drainage groove. Generally speaking, a straight groove can meet the drainage requirements of the fins, and the stamping process is also simpler.

[0028] In this embodiment, a first drainage groove 4 is provided between the first opening 2 and the second opening 3 on the fin. The first drainage groove 4 is recessed on one side of the thickness direction of the first plate 1, so that it can play a role in collecting and guiding the condensate generated near the first opening 2 and the second opening 3 on the fin. It guides the water flow and, through the continuous downward suction force, drags the water to the drainage channel, so that the condensate can be discharged faster under the action of gravity and siphon force, thereby improving the drainage performance of the fin.

[0029] like Figure 1-4 As shown, in one specific embodiment, the first plate 1 further includes a second drainage groove 5. The second drainage groove 5 is located on the side of the second opening portion 3 away from the first drainage groove 4. The second drainage groove 5 is recessed on the side of the first plate 1 in the thickness direction. The length direction of the second drainage groove 5 extends at least partially along the length direction of the first plate 1.

[0030] The second drainage groove 5 serves the same purpose as the first drainage groove 4: to collect and guide the condensate generated on the fins, thus promoting drainage. The second drainage groove 5 further enhances the drainage performance of the fins. Furthermore, since the first drainage groove 4 is located between the first opening 2 and the second opening 3, condensate around both openings may need to be discharged through the first drainage groove 4. The second drainage groove 5 primarily drains condensate generated near the second opening 3. Therefore, the width of the first drainage groove 4 can be made slightly larger than the width of the second drainage groove 5 to better meet drainage requirements.

[0031] In addition, it should be noted that the first drainage groove 4 and the second drainage groove 5 also serve a similar function to the reinforcing ribs, thereby increasing the overall strength of the fins and reducing fin deformation or collapse. The shape of the second drainage groove 5 can be the same as or different from that of the first drainage groove 4. That is, the concave shape of the second drainage groove 5 can be a straight line, or it can be a groove composed of multiple rhombuses, triangles, or ellipses, etc. This will not be elaborated on in this article.

[0032] like Figure 1-4 As shown, in one specific embodiment, the first plate 1 has a first side 11 and a second side 12 in the length direction. The first opening portion 2 includes a first notch 21, which is located on the side of the first plate 1 near the first side 11, and the opening of the first notch 21 penetrates through the first side 11. The second opening portion 3 includes a first through hole 31, which is located on the side of the first plate 1 near the second side 12, and the hole wall of the first through hole 31 is annular.

[0033] In this embodiment, the opening of the first notch 21 extends through the first side 11, while the first through hole 31 has a closed peripheral wall on the first plate 1. Therefore, when this fin is applied to a heat exchanger, the first notch 21 can be used to insert a heat exchange tube (the first heat exchange tube 200 mentioned later) for heat exchange tube installation, while the first through hole 31 can be used to insert another type of heat exchange tube (the second heat exchange tube 300 mentioned later) for heat exchange tube installation. It should be noted that the term "closer" as described herein refers to a closer distance to a certain position. For example, "the first notch 21 is located on the side of the first plate 1 closer to the first side 11" means that the distance from the first notch 21 to the first side 11 is closer than the distance from the first through hole 31 to the first side 11. Such a distance difference is sufficient to intuitively indicate that they are closer, and the specific distance of "closer" is not limited herein.

[0034] In a more specific embodiment, the first notch 21 is flat, and the first through hole 31 is round or elliptical, meaning the wall of the first through hole 31 is annular or elliptical. In this case, the heat exchange tube inserted into the first notch 21 can be a flat tube, while the heat exchange tube inserted into the first through hole 31 can be a round or elliptical tube. This allows for better integration of the fin structure with different types of heat exchange tubes, thereby achieving better drainage performance and heat exchanger performance.

[0035] Specifically, the heat exchanger operates more efficiently on the windward side. Flat tubes have numerous small holes, ensuring high heat exchange efficiency for the refrigerant flowing through each hole. In contrast, round or elliptical tubes have much larger holes than microchannels, resulting in less direct contact between most of the refrigerant and the tube wall, leading to lower heat transfer efficiency. Therefore, a flat tube can be positioned on one side of the first notch 21 as the windward side, while a round tube can be positioned on one side of the first through-hole 31 as the leeward side.

[0036] Furthermore, since the opening of the first notch 21 extends through the first side 11, condensate on that side is difficult to drain. The first through-hole 31, however, has a complete peripheral wall, allowing drainage from both sides. Additionally, the round tube, being narrower and having a circular arc surface than the flat tube, does not obstruct water flow under gravity. The flat tube, being wider, obstructs water flow from top to bottom, resulting in poorer drainage. Therefore, by arranging the first notch 21 as a flat tube facing the windward side, heat exchange efficiency can be ensured while allowing condensate near the first notch 21 to be blown by the wind to the vicinity of the first drain groove 4 and the first through-hole 31, thus better draining it outside the fins. This improves drainage while ensuring sufficient heat exchange. Therefore, this embodiment of the application, by combining the first notch 21 and the first through-hole 31 on the same fin, improves the fin's drainage performance while maintaining heat exchange performance.

[0037] like Figure 4 As shown, in one specific embodiment, if the width of the first plate 1 between the first drainage groove 4 and the first side 11 is defined as W1, and the width of the first plate 1 between the first drainage groove 4 and the second side 12 is defined as W2, then: 1 / 5 ≤ W2 / W1 ≤ 3 / 5. Furthermore, the first drainage groove 4, the second drainage groove 5, etc., preferably extend to the bottom edge of the first plate 1, which facilitates the collection and direct discharge of condensate.

[0038] As can be seen from the above, the first notch 21 can be used to insert a flat tube and play the main role in heat exchange, while the first through hole 31 can be used to insert a round or elliptical tube. While performing heat exchange, it mainly ensures the drainage performance of the fins. Therefore, when the width W1 of the first plate 1 between the first drainage groove 4 and the first side 11 is greater than the width W2 of the first plate 1 between the first drainage groove 4 and the second side 12, and 1 / 5≤W2 / W1≤3 / 5, the area of ​​the first plate 1 on the flat tube side is larger and the area on the round or elliptical tube side is smaller. The side with the larger area can perform heat exchange better, thereby making fuller use of the limited area of ​​the fins and better ensuring the heat exchange performance of the fins.

[0039] like Figure 1-4 As shown, in one specific embodiment, the first opening portion 2 includes at least one first flange 22, which is located on at least one side of the first notch 21 along the width direction; the second opening portion 3 includes a plurality of second flanges 32, which are spaced apart at the periphery of the first through hole 31; the first plate 1 has a plurality of first protrusions 8, which are located between two adjacent first notches 2 and / or between two adjacent first through holes 3. The first protrusions 8 can be of various shapes, such as rectangular or circular, which are not specifically limited herein.

[0040] In this embodiment, the first flange 22 and the second flange 32 protrude towards one side of the thickness direction of the first plate 1. When multiple fins are stacked and arranged, the first flange 22 and the second flange 32 can effectively maintain the spacing between adjacent fins, reducing the possibility of fins collapsing or deforming during assembly or transportation after assembly. In addition, the first protrusion 8 can increase the strength of the fins and also increase the contact area between the fins and the air, thereby improving the heat exchange performance.

[0041] like Figure 5 As shown, in one specific embodiment, if a plurality of first through holes 31 along the length direction of the first plate 1 are defined as a group of first through holes 31, then the first plate 1 has at least two groups of first through holes 31, and a third drainage groove 6 is provided between two adjacent groups of first through holes 31, and the length direction of the third drainage groove 6 extends at least partially along the length direction of the first plate 1.

[0042] Along the width direction of the first plate 1, when there are multiple rows of first through holes 31, a third drainage groove 6 can be set between two adjacent rows of first through holes 31 to ensure improved drainage performance. However, since the heat exchange effect is worse the further away the heat exchange tube is from the windward side, and too many rows will result in the increased number of rows being disproportionate to the improvement in heat exchange performance, under normal circumstances, 1 to 3 rows of first through holes 31 are sufficient. When there are 1 to 2 rows of first through holes 31, the combination of the first through holes 31 with a row of first notches 21 can achieve the best heat exchange and drainage effect.

[0043] like Figure 1-5 As shown, in one specific embodiment, the number of second openings 3 is less than or equal to the number of first openings 2. A surface perpendicular to the width direction of the first plate 1 is defined as the first surface, and the projection of the second opening 3 on the first surface coincides with the projection of the first opening 2 on the first surface.

[0044] When the projection of the second opening 3 on the first surface coincides with the projection of the first opening 2, it means that the second opening 3 and the first opening 2 are on the same horizontal line of the first plate 1. This allows for the lowest possible air resistance after the heat exchange tube is installed. If the second opening 3 and the first opening 2 are misaligned, they will obstruct the flow of air during heat exchange, thereby increasing the air resistance and affecting the heat exchange efficiency.

[0045] like Figure 1-5 As shown, in one specific embodiment, the first plate 1 includes a plurality of first ribs 7. The first ribs 7 are located on at least one side of the first opening portion 2 along the width direction. The first ribs 7 protrude outward from one side of the first plate 1 in the thickness direction, and the length direction of the first ribs 7 extends along the length direction of the first opening portion 2.

[0046] After the heat exchange tube is inserted into the first notch 21 of the first opening 2, the first plate 1, being relatively thin, is prone to collapsing or deforming in the vicinity of the first opening 2. The first rib 7 strengthens the area around the first notch 21, reducing the likelihood of collapse or deformation. Furthermore, the first rib 7 increases the contact area between the fins and the air, improving heat exchange. The increased strength of the first rib 7 ensures better adhesion between the heat exchange tube and the wall of the first notch 21, improving the fin welding rate and guaranteeing optimal heat exchanger performance.

[0047] like Figure 1-5 As shown, in one specific embodiment, the first rib 7 is located on both sides of the first opening portion 2 along the width direction, and the shortest distance between the first rib 7 and the second opening portion 3 is less than the shortest distance between the first opening portion 2 and the second opening portion 3.

[0048] When the first rib 7 is provided on both sides of the first opening 2 along the width direction, it can further enhance the area around the first notch 21. In addition, due to the insertion of the heat exchange tube, the area near the bottom of the first notch 21 is more prone to deformation. Therefore, when the shortest distance between the first rib 7 and the second opening 3 is less than the shortest distance between the first opening 2 and the second opening 3, the first rib 7 can enhance the area near the bottom of the first notch 21, thereby reducing the possible deformation and bending in this area.

[0049] like Figure 6-7 As shown, in one specific embodiment, the length direction of the first opening portion 2 is inclined to the width direction of the first plate 1, and the angle between the length direction of the first opening portion 2 and the width direction of the first plate 1 is 10°~25°.

[0050] When the first opening 2 is tilted in the width direction of the first plate 1, after the heat exchange tube is installed, the condensate can be easily discharged from the heat exchange tube at the first opening 2 under the action of gravity. However, if the tilt angle of the first opening 2 is too large, it will increase the obstruction of the flat tube to the wind, which is not conducive to heat exchange. Therefore, its tilt angle is preferably 10°~25°.

[0051] like Figure 8-10As shown, a second aspect of this application provides a heat exchanger comprising a plurality of fins 100, a plurality of first heat exchange tubes 200, and a plurality of second heat exchange tubes 300. The fins 100 are the same as those in the first aspect embodiment, and the plurality of fins 100 are arranged at intervals. The first heat exchange tubes 200 are disposed in at least a portion of the first openings 2 along the arrangement direction of the fins 100; the second heat exchange tubes 300 are disposed in at least a portion of the second openings 3 along the arrangement direction of the fins 100. Furthermore, the heat exchanger also includes components such as manifolds and distribution pipes. However, since these components are conventional structures of heat exchangers, and this application does not involve improvements to the manifolds and distribution pipes, these components will not be described in detail herein.

[0052] As mentioned in the above embodiments, the first heat exchange tube 200 can be a flat tube, and the first heat exchange tube 200 includes multiple channels, which are arranged at intervals along the width direction of the first heat exchange tube 200. The second heat exchange tube 300 can be a round tube or an elliptical tube, which may only require one channel for refrigerant to flow.

[0053] The fins 100 of this heat exchanger are those in the first embodiment. Because the fins in the first embodiment have better drainage performance, the condensate on the fins 100 can be discharged more promptly during operation, resulting in better heat exchange performance at low temperatures. Furthermore, since this heat exchanger combines a flat tube (first heat exchange tube 200) and a round tube (second heat exchange tube 300), one side of the first heat exchange tube 200 acts as the windward side, providing the primary heat exchange effect, while the other side of the second heat exchange tube 300 effectively drains water. Therefore, this heat exchanger can better balance heat exchange and drainage performance.

[0054] like Figure 10 As shown, in one specific embodiment, the width of the first heat exchange tube 200 is smaller than the width of the first opening 2. The width direction of the fins 100 is parallel to the horizontal plane, or the width direction of the fins 100 is inclined to the horizontal plane, and the angle between the width direction of the fins 100 and the horizontal plane is 30°~80°. After the fins 100 are arranged at an incline, the length direction of the first opening 2 is tilted, which makes the air duct straighter, thereby balancing the front and rear air resistance, making the air velocity more uniform, and the heat exchange more even.

[0055] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications should also fall within the protection scope of this application.

Claims

1. A fin, characterized in that, The first plate (1) includes a first plate (1) having a plurality of first openings (2) and a plurality of second openings (3), the first openings (2) and the second openings (3) being arranged at intervals along the width direction of the first plate (1); the first plate (1) also includes a first drainage groove (4), the first drainage groove (4) being located between the first openings (2) and the second openings (3), the length direction of the first drainage groove (4) extending at least partially along the length direction of the first plate (1), and the first drainage groove (4) being recessed into one side of the thickness direction of the first plate (1).

2. The fin according to claim 1, characterized in that, The first plate (1) further includes a second drainage groove (5), which is located on the side of the second opening (3) away from the first drainage groove (4). The second drainage groove (5) is recessed on the side of the thickness direction of the first plate (1), and the length direction of the second drainage groove (5) extends at least partially along the length direction of the first plate (1).

3. The fin according to claim 1 or 2, characterized in that, The first plate (1) has a first side (11) and a second side (12) in the length direction. The first opening (2) includes a first notch (21), which is located on the side of the first plate (1) near the first side (11), and the opening of the first notch (21) penetrates the first side (11). The second opening (3) includes a first through hole (31), which is located on the side of the first plate (1) near the second side (12), and the hole wall of the first through hole (31) is annular.

4. The fin according to claim 3, characterized in that, Define the width of the first plate (1) between the first drainage channel (4) and the first side (11) as W1, and the width of the first plate (1) between the first drainage channel (4) and the second side (12) as W2. Then: 1 / 5≤W2 / W1≤3 / 5.

5. The fin according to claim 4, characterized in that, The first opening portion (2) includes at least one first flange (22), which is located on at least one side of the first notch (21) along the width direction; the second opening portion (3) includes a plurality of second flanges (32), which are spaced apart at the periphery of the first through hole (31); the first plate body (1) has a plurality of first protrusions (8), which are located between two adjacent first notches (21) and / or between two adjacent first through holes (31).

6. The fin according to claim 3, characterized in that, If a plurality of first through holes (31) along the length direction of the first plate (1) are defined as a group of first through holes (31), then the first plate (1) has at least two groups of first through holes (31), and a third drainage groove (6) is provided between two adjacent groups of first through holes (31), and the length direction of the third drainage groove (6) extends at least partially along the length direction of the first plate (1).

7. The fin according to any one of claims 1-2 or 4-6, characterized in that, The number of the second opening (3) is less than or equal to the number of the first opening (2). A surface perpendicular to the width direction of the first plate (1) is defined as the first surface. The projection of the second opening (3) on the first surface coincides with the projection of the first opening (2) on the first surface.

8. The fin according to any one of claims 1-2 or 4-6, characterized in that, The first plate (1) includes a plurality of first ribs (7), the first ribs (7) are located on at least one side of the first opening (2) along the width direction, the first ribs (7) protrude outward from one side of the first plate (1) in the thickness direction, and the length direction of the first ribs (7) extends along the length direction of the first opening (2).

9. The fin according to claim 8, characterized in that, The first rib (7) is located on both sides of the first opening (2) along the width direction, and the shortest distance between the first rib (7) and the second opening (3) is less than the shortest distance between the first opening (2) and the second opening (3).

10. The fin according to any one of claims 1-2, 4-6, or 9, characterized in that, The length direction of the first opening (2) is inclined to the width direction of the first plate (1), and the angle between the length direction of the first opening (2) and the width direction of the first plate (1) is 10°~25°.

11. A heat exchanger, characterized in that, It includes multiple fins (100), multiple first heat exchange tubes (200) and multiple second heat exchange tubes (300), wherein the fins (100) are the fins according to any one of claims 1-10, the multiple fins (100) are arranged at intervals, the first heat exchange tubes (200) are disposed in at least a portion of the first opening (2) along the arrangement direction of the fins (100); and the second heat exchange tubes (300) are disposed in at least a portion of the second opening (3) along the arrangement direction of the fins (100).

12. The heat exchanger according to claim 11, characterized in that, The width of the first heat exchange tube (200) is smaller than the width of the first opening (2), the width direction of the fin (100) is parallel to the horizontal plane, or the width direction of the fin (100) is inclined to the horizontal plane, and the angle between the width direction of the fin (100) and the horizontal plane is 30°~80°.

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