Heat exchanger fin, heat exchanger, indoor unit and air conditioner

Abstract

A heat exchanger fin, a heat exchanger, an indoor unit, and an air conditioner are described. The heat exchanger fin comprises: a fin body (1), wherein the fin body comprises an air outlet contour line (13) disposed on one side and an air inlet contour line (12) disposed on the other side; several refrigerant pipe mounting holes (11) are provided in the fin body (1); and on a straight line where the radius of curvature of the air outlet contour line (13) of the fin body (1) is located, or on a straight line where the radius of curvature of the air inlet contour line (12) of the fin body (1) is located, the distance between the air inlet contour line (12) and the air outlet contour line (13) of the fin body (1) is gradually reduced from the center towards the two ends of the heat exchanger fin.

Description

Heat exchanger fin, heat exchanger, indoor unit and air conditioner FIELD This disclosure relates to the field of air conditioning technology, in particular to a heat exchanger fin, a heat exchanger, an indoor unit, and an air conditioner. More specifically, the present invention relates to a fin as defined in the preamble of claim 1 and as illustrated in document CN 101907374A. BACKGROUND Currently, a heat exchanger fin commonly used in an indoor unit heat exchanger is mostly rectangular with equal widths or has a partially non-standard shape at both ends of the rectangle. The pipe flow paths within the heat exchanger fin are also arranged uniformly according to a predetermined rule. However, the airflow exiting an indoor unit fan is generally non-uniform, easily leading to excess air volume in some areas of the heat exchanger and material waste in others. This results in low heat exchanger utilization and negatively impacts the air conditioner's heat exchange efficiency. SUMMARY The purpose of this disclosure is to solve at least one technical problem existing in the prior art or in the related art. To that end, one objective of this disclosure is to provide a heat exchanger fin. Another objective of this disclosure is to provide a heat exchanger. An additional objective of this disclosure is to provide inner unity. An additional objective of this disclosure is to provide an air conditioner. To achieve the above objectives, in a first aspect, the present disclosure provides, in embodiments, a heat exchanger fin comprising: a fin body, comprising an air outlet contour line disposed on one side and an air inlet contour line disposed on the other side, and provided with a plurality of coolant pipe mounting holes, wherein the distance between the air inlet contour line and the air outlet contour line of the fin body, either in a straight line of the radius of curvature of the air outlet contour line of the fin body or in a straight line of the radius of curvature of the air inlet contour line of the fin body, gradually decreases from the center towards the flanks of the heat exchanger fin. According to the embodiments of the first aspect of this disclosure, the heat exchanger fin includes a fin body; the fin body is provided with a plurality of refrigerant pipe mounting holes to allow the assembly of refrigerant pipes;The distance between the air inlet contour line and the air outlet contour line of the fin body, on the straight line of the radius of curvature of the air outlet contour line of the fin body or on the straight line of the radius of curvature of the air inlet contour line of the fin body, is arranged to gradually decrease from the center towards the flanks of the heat exchanger fin, so that the fin body has a larger area in the central region than in the flank region, thus allowing the area of ​​the central region of the fin body, where the air volume is high, to be increased, and the area of ​​the flank region of the fin body, where the air volume is low, thereby improving the utilization of the fin body, increasing the heat exchange performance and reducing energy consumption;At the same time, material waste is reduced in the region where the air volume is low, thus reducing manufacturing costs. It is worth noting that the airflow coming out of a fan in a common air conditioner (particularly an indoor unit) is not uniform, as the volume of air in the central airflow is usually greater than that of the peripheral airflow. Furthermore, the heat exchanger fin in the above embodiment of this disclosure may also have the following additional technical features. In the above embodiment, the fin body is a one-piece structure. It should be noted that the one-piece structure of the fin body specifically refers to a structure that is formed as a single unit during the processing or manufacturing process. In some examples, this single-unit formation is achieved by cutting or shaping a raw material. In the above embodiment, the fin body is concave in a direction from an air inlet side to an air outlet side, and at least part of the air outlet contour line overlaps with the air inlet contour line after a translational movement. In this embodiment, the fin body is arranged to be concave in the direction from the air inlet side to the air outlet side, so that the fin body has a curved shape, thereby increasing the distance between the central region of the fin body and an outlet from which the airflow originates, thereby reducing the air pressure on the heat exchanger fin; and at least part of the air outlet contour line of the fin body is arranged to overlap with the air inlet contour line after a translational movement, to facilitate adaptation of the fin body during processing, reduce waste material during processing, and consequently reduce the manufacturing cost.It should be understood that the shaping and adaptation of the fin body are done from a single piece of raw material during manufacturing and processing, so reducing the distance between two fins along the entire piece of raw material increases material utilization. In the above embodiment, a first end and a second end of the air inlet contour line are connected to the air outlet contour line, respectively; a maximum distance point is located within an interval of between 1 / 5 and 4 / 5 of the air inlet contour line along the direction from the first end to the second end of the air inlet contour line. In this embodiment, the first and second ends of the air inlet contour line are arranged to connect to the air outlet contour line, respectively, forming a complete outer contour of the fin body; the point of maximum distance is located within a range of between 1 / 5 and 4 / 5 of the air inlet contour line along the direction from the first end to the second end of the air inlet contour line, so that the maximum distance is located away from the first and second ends (i.e., the maximum distance is located within the central region of the fin body, allowing a region with the largest area of ​​the fin body to correspond to a higher volume of airflow, thereby improving the utilization of the heat exchanger fin. In the above embodiment, a straight line corresponding to the maximum distance extends along an air inlet direction for the heat exchanger fin. In this embodiment, the straight line corresponding to the maximum distance is arranged so that it extends along the air inlet direction for the heat exchanger fin, ensuring that the fin body's extension direction aligns with the air inlet direction. This increases the contact area between the fin body and the inlet airflow, thereby improving heat exchange efficiency. It is important to note that the air inlet direction refers to the general direction of the inlet airflow.There is a maximum distance between the air inlet contour line and the air outlet contour line of the fin body on the straight line of the radius of curvature of the air outlet contour line of the fin body or on the straight line of the radius of curvature of the air inlet contour line of the fin body, where the straight line on which the maximum distance is found is the straight line corresponding to the maximum distance. In the above embodiment, the fin body is symmetrical with respect to the straight line corresponding to the maximum distance. In this embodiment, the fin body is arranged symmetrically with respect to the straight line corresponding to the maximum distance, so that two parts of the fin body that are divided by the straight line corresponding to the maximum distance have similar conformations, which gives the heat exchanger, including the heat exchanger fin, uniform heat exchange performance and facilitates the adaptation of the heat exchanger fin during processing. In the above embodiment, the length of the air inlet contour line on one side of the straight line corresponding to the maximum distance is greater than the length of the air inlet contour line on the other side of the straight line corresponding to the maximum distance. In this embodiment, the length of the air inlet contour line on one side of the straight line corresponding to the maximum distance is arranged to be greater than the length of the air inlet contour line on the other side of the straight line corresponding to the maximum distance, so that the fin body has an essentially asymmetrical shape. This allows for increasing the area of ​​a region of the fin body where the air volume is high and reducing the area of ​​a region where the air volume is low. These regions are arranged according to different air volumes in the inlet airflow, thereby further improving the utilization of the heat exchanger fin. It should be understood that the inlet airflow is not uniform, so the air volume of the airflow does not necessarily have exact symmetry. In the above embodiment, the air outlet contour line includes five arc segments connected in sequence, and the adjacent arc segments have curvatures that gradually decrease from the center towards the flanks of the heat exchanger fin. In this embodiment, the air outlet contour line is arranged to include five arc segments connected in sequence, and the adjacent arc segments are arranged so that their curvature gradually decreases from the center towards the flanks of the heat exchanger fin, so that different parts of the fin body are provided with different conformations by varying the curvatures of the different arc segments, making it easier to shape and adapt the fin body during processing according to the air volume of the inlet airflow. In the above embodiment, a plane in which the air inlet direction for the fin body is located is a first plane, and a plane that is perpendicular to the first plane is a second plane; and the fin body has a larger projection size in the second plane than in the first plane. In this embodiment, the plane in which the air inlet direction for the fin body is located is arranged to be a first plane, and a plane perpendicular to the first plane is arranged to be a second plane; and the fin body is arranged so as to have a larger projection size in the second plane than in the first plane, so that the fin body can be provided with a larger angle between the air inlet contour line and the air outlet contour line, thereby increasing the contact area between the coolant pipe arranged in the heat exchanger fin and the inlet airflow, thereby improving the heat exchange efficiency. In the previous embodiment, the fin body has a larger projection size in the second plane on one side of the straight line corresponding to the maximum distance than in the second plane on the other side of the straight line corresponding to the maximum distance. In this embodiment, the fin body is arranged to have a larger projection size in the second plane on one side of the straight line corresponding to the maximum distance than in the second plane on the other side of the straight line corresponding to the maximum distance, so that the fin body has an asymmetrical shape, and two parts of the fin body have different projection sizes in the second plane (i.e., two parts of the fin body, which are divided by the straight line corresponding to the maximum distance, have different sizes in a plane perpendicular to the air inlet direction), allowing a region with a larger fin body size to correspond to the airflow of greater air volume and a region with a smaller fin body size to correspond to the airflow of lesser air volume.These fins are arranged according to the different volumes of air in the incoming airflow, thereby improving the utilization of the fin body and increasing heat exchange efficiency. In the previous embodiment, the fin body has a larger projection size in the foreground on one side of the straight line corresponding to the maximum distance than in the foreground on the other side of the straight line corresponding to the maximum distance. In this embodiment, the fin body is arranged to have a larger projection size in the foreground on one side of the straight line corresponding to the maximum distance than in the foreground on the other side of the straight line corresponding to the maximum distance, so that the fin body has an asymmetrical conformation, and two parts of the fin body have different projection sizes in the foreground where the air inlet direction is located, allowing a region with a larger fin body size to correspond to the airflow of greater volume of air and a region with a smaller fin body size to correspond to the airflow of lesser volume of air, which are arranged according to different air volumes of the inlet airflow, thereby improving the utilization of the fin body and increasing the efficiency of heat exchange. In the above embodiment, the heat exchanger fin is formed as an equidistant region in the center, and the distance between the air inlet contour line and the air outlet contour line is equal within the equidistant region. In this embodiment, the heat exchanger fin is arranged to form an equidistant region at its center, and the distance between the air inlet contour line and the air outlet contour line is also equal within this equidistant region. This increases the area of ​​the fin body corresponding to the inlet airflow with the larger air volume, thereby improving fin body utilization and increasing heat exchange efficiency. It should be understood that the air volume of the central airflow is equal or nearly equal, with extremely low variation. In the above embodiment, the air inlet contour line and the air outlet contour line within the equidistant region are any one of, or any combination of, an arc and a straight line. In this embodiment, the air inlet contour line and the air outlet contour line within the equidistant region can have various shapes, including any one or any combination of an arc and a straight line, where the straight line is convenient for finishing the fin body during processing, while the arc allows the air inlet contour line and the air outlet contour line to be aerodynamic, which is beneficial for reducing wind resistance and making the airflow smoother. In the above embodiment, the number of coolant pipe mounting holes gradually decreases from the center towards the flanks of the heat exchanger fin. In this embodiment, the number of coolant pipe mounting holes is arranged so that it gradually decreases from the center towards the flanks of the heat exchanger fin, so that the region of the fin body corresponding to the inlet airflow with a higher air volume is provided with more coolant pipes, and the region of the fin body corresponding to the inlet airflow with a lower air volume is provided with fewer coolant pipes, thus making it possible to take full advantage of the inlet airflow and improve the heat exchange efficiency, in addition to facilitating the reduction of the area of ​​the fin body region corresponding to the inlet airflow with a lower air volume to save material. In the above embodiment, the distance between adjacent refrigerant pipe mounting holes is positively correlated with the diameter of the refrigerant pipe mounting hole. In this embodiment, to reduce the mutual influence between the refrigerant pipes, adjacent refrigerant pipes are maintained at a specific distance. Since the total area of ​​the fin body is limited, the distance between adjacent refrigerant pipe mounting holes is arranged so that it is positively correlated with the diameter of the refrigerant pipe mounting hole, thus ensuring the refrigerant pipes are arranged efficiently within the limited space. In other words, the larger the diameter of a refrigerant pipe, the greater the distance between adjacent refrigerant pipes; and the smaller the diameter of the refrigerant pipe, the smaller the distance between adjacent refrigerant pipes, thereby improving the utilization of the heat exchanger fin. In the above embodiment, the internal diameter of the coolant pipe mounting hole gradually decreases from the center towards the flanks of the heat exchanger fin. In this embodiment, the internal diameter of the refrigerant pipe mounting hole is arranged so that it gradually decreases from the center towards the flanks of the heat exchanger fin, so that the refrigerant pipes have different pipe diameters depending on the different positions in which the refrigerant pipe is located in the fin body, allowing a refrigerant pipe with a larger pipe diameter to be arranged in the region of the fin body where the area is larger, and allowing a refrigerant pipe with a smaller pipe diameter to be arranged in the region of the fin body where the area is smaller, thus improving the utilization of the heat exchange fin, increasing heat exchange performance and reducing energy consumption;At the same time, by reducing material waste in the region where the air volume is low, it facilitates a reduction in manufacturing costs. The fin body can be a one-piece structure or a split, composite structure. It's important to note that a one-piece fin body specifically refers to a structure formed as a single unit during the manufacturing or processing stage. In some cases, this single unit is achieved by cutting or shaping a raw material. In the above embodiment, the distance between the air inlet contour line and the air outlet contour line of the fin body corresponding to the coolant pipe mounting hole is positively correlated with the internal diameter of each coolant pipe mounting hole, either in a straight line of the radius of curvature of the air outlet contour line of the fin body or in a straight line of the radius of curvature of the air inlet contour line of the fin body. In this embodiment, the distance between the air inlet contour line and the air outlet contour line of the fin body corresponding to the refrigerant pipe mounting hole is arranged to be positively correlated with the internal diameter of each refrigerant pipe mounting hole, either along the straight line of the curvature radius of the air outlet contour line of the fin body or along the straight line of the curvature radius of the air inlet contour line of the fin body. In other words, the greater the distance between the air inlet contour line and the air outlet contour line of the fin body, the larger the internal diameter of the corresponding refrigerant pipe mounting hole, so that the diameter of the refrigerant pipe to be mounted in the refrigerant pipe mounting hole is consequently larger.Conversely, the smaller the distance between the air inlet contour line and the air outlet contour line of the fin body, the smaller the internal diameter of the corresponding refrigerant pipe mounting hole. Consequently, the diameter of the refrigerant pipe to be mounted in the refrigerant pipe mounting hole is smaller, allowing the fin body to be used to its fullest potential based on the areas of different regions. By providing matching refrigerant pipe mounting holes for the corresponding part, the utilization of the heat exchanger fin is improved, the heat exchange performance is increased, and energy consumption is reduced when the heat exchanger fin is mounted with refrigerant pipes that match the refrigerant pipe mounting holes. In the above embodiment, the internal diameter of each coolant pipe mounting hole is linearly and positively correlated with the distance between the centers of the circles of any two adjacent coolant pipe mounting holes, either on a straight line of the radius of curvature of the air outlet contour line of the fin body or on a straight line of the radius of curvature of the air inlet contour line of the fin body. In this embodiment, the internal diameter of each refrigerant pipe mounting hole is arranged so as to correlate linearly and positively with the distance between the centers of the circles of any two adjacent refrigerant pipe mounting holes, either on the straight line of the radius of curvature of the air outlet contour line of the fin body or on the straight line of the radius of curvature of the air inlet contour line of the fin body, so that the internal diameter of the refrigerant pipe mounting hole is arranged as a function of the distance between the centers of the circles of any two adjacent refrigerant pipe mounting holes.In other words, the greater the distance between the centers of the circles of two adjacent refrigerant pipe mounting holes, the larger the internal diameter of the refrigerant pipe mounting hole; and vice versa, the smaller the distance between the centers of the circles of two adjacent refrigerant pipe mounting holes, the smaller the internal diameter of the refrigerant pipe mounting hole. This ensures that adjacent refrigerant pipe mounting holes are kept at an appropriate distance from the centers of the circles, improving the utilization of the heat exchanger fin, increasing heat exchange performance, and reducing energy consumption when the heat exchanger fin is mounted with refrigerant pipes that match the refrigerant pipe mounting holes.It should be understood that an excessive distance between the centers of adjacent refrigerant pipe mounting hole circles will easily lead to insufficient heat exchange in the refrigerant pipe, affecting the heat exchange efficiency; too small a distance between the centers of adjacent refrigerant pipe mounting hole circles will easily lead to wasted refrigerant pipe material and will also result in too small an area of ​​a fin body region between two adjacent refrigerant pipe mounting holes, resulting in easy breakage and thus negatively affecting the reliability of the heat exchanger fin. In a second aspect, the present disclosure provides, in embodiments, a heat exchanger comprising: a plurality of heat exchanger fins as described in any one of the embodiments of the first aspect, arranged side by side, wherein the distance between any two adjacent heat exchanger fins is not less than a predetermined interval; and a coolant pipe, wherein the pipe diameter of the coolant pipe is fitted to the size of a coolant pipe mounting hole of the heat exchanger fin, and the coolant pipe passes through the coolant pipe mounting hole. According to the embodiment of the second aspect, the heat exchanger includes a plurality of heat exchanger fins as described in any one of the embodiments of the first aspect and a coolant pipe, wherein the plurality of heat exchanger fins are arranged side by side, forming a heat exchanger fin arrangement; and the pipe diameter of the coolant pipe is adjusted to the size of the coolant pipe mounting hole. The coolant pipe mounting holes, arranged in the heat exchanger fin arrangement, are provided with the coolant pipes, allowing heat exchange between the coolant pipes and the inlet airflow, so that air temperature adjustment is achieved.The heat exchanger of this embodiment presents all the beneficial advantages described for the heat exchanger fin as described in any one of the embodiments of the first aspect of this disclosure, which is not detailed herein. In a third aspect, the present disclosure provides, in embodiments, an indoor unit that includes: a housing, provided with an air inlet and an air outlet; a fan, arranged inside the housing; and the heat exchanger described in the embodiments of the second aspect, which is arranged inside the housing and arranged correspondingly to the fan. According to the embodiment of the third aspect, the indoor unit includes a casing, a fan, and the heat exchanger described in the embodiments of the second aspect, wherein the casing is provided with an air inlet and an air outlet, thereby forming an airflow channel within the casing; the fan is arranged within the casing so as to force air to flow from the air inlet to the air outlet by means of the fan's rotation; and the heat exchanger is arranged correspondingly to the fan within the casing, wherein, specifically, the heat exchanger is arranged between the fan and the air outlet of the casing, so that the fan forces air to flow into the heat exchanger for heat exchange before its discharge through the air outlet of the casing, thereby achieving the adjustment of the air temperature.The indoor unit of this embodiment offers all the beneficial advantages described for the heat exchanger as described in the embodiments of the second aspect of this disclosure, which is not detailed herein. In a fourth aspect, this disclosure provides, in embodiments, an air conditioner that includes an outdoor unit, as well as the indoor unit described in the embodiments of the third aspect, which is connected to the outdoor unit. According to the embodiment of the fourth aspect, the air conditioner includes an outdoor unit and the indoor unit described in the embodiments of the third aspect, which is connected to the outdoor unit, so that various air conditioning modes can be achieved through refrigerant interaction between the outdoor and indoor units. The air conditioner of this embodiment provides all the beneficial advantages described for the indoor unit as described in the embodiments of the third aspect of this disclosure, which are not detailed herein. Other aspects and benefits of this disclosure will become evident in the following description, or will be understood through the implementation of this disclosure. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a schematic structural view of a heat exchanger fin according to one embodiment of the present disclosure; Figure 2 shows a schematic structural view of a heat exchanger fin according to one embodiment of the present disclosure; Figure 3 shows a schematic structural view of a heat exchanger fin according to one embodiment of the present disclosure; Figure 4 shows a schematic structural view of a heat exchanger fin processing design according to one embodiment of the present disclosure; Figure 5 shows a schematic structural view of a heat exchanger fin according to one embodiment of the present disclosure; Figure 6 shows a schematic structural view of a heat exchanger fin according to one embodiment of the present disclosure; Figure 7 shows a schematic diagram of an internal structure of an indoor unit according to one embodiment of the present disclosure. The correspondence between the reference signs and the components of Figures 1 to 7 is as follows. 1 fin body; 11 coolant pipe mounting hole; 12 air inlet contour line; 13 air outlet contour line; 14 maximum distance point; 15 process notch; 16 equidistant region; 17 first position point; 2 heat exchanger; 3 fan; 4 housing; 41 air outlet; 5 waste region; 61 foreground; 62 background. DETAILED DESCRIPTION To provide a clearer understanding of the objectives, features, and benefits of this disclosure, as mentioned above, it is described in more detail below, along with the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments described in this disclosure can be combined without conflict. The following description sets out numerous specific details to fully understand this disclosure. However, this disclosure may also be implemented in ways other than those described herein. Therefore, the scope of protection of this disclosure is not limited by the specific embodiments disclosed below. A heat exchanger fin, a heat exchanger, an indoor unit, and an air conditioner are described below according to some embodiments of this disclosure, with reference to Figures 1 to 7. Implementation method 1 In this embodiment, a heat exchanger fin is provided. As shown in Figure 1, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, whether along a straight line with the radius of curvature of the air outlet contour line 13 of fin body 1 or along a straight line with the radius of curvature of the air inlet contour line 12 of fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the coolant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the air inlet contour line 12 and the air outlet contour line 13 are connected by arcs at the flanks of the heat exchanger fin. There is a single maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1.Along a direction from one end to the other of the air inlet contour line 12, the maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically, the maximum distance point 14 lies within a region where the air volume of the inlet airflow is at its maximum, allowing for an increase in the size of a region of the fin body 1 where the air volume is high and a decrease in the size of a region of the fin body 1 where the air volume is low, thereby improving the utilization of the fin body 1 and thus enhancing heat transfer efficiency when the fin body 1 is fitted with coolant piping.It should be noted that, as shown in Figure 1, both the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1 are provided with a process notch 15, in order to facilitate the adaptation of the fin body 1 during processing. Implementation method 2 In this embodiment, a heat exchanger fin is provided. As shown in Figure 2, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape. The distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1,Whether along a straight line of curvature of the air outlet contour line 13 of fin body 1 or along a straight line of curvature of the air inlet contour line 12 of fin body 1, it gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the refrigerant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, corresponding to the refrigerant pipe mounting hole 11,is positively correlated with the internal diameter of the refrigerant pipe mounting hole 11. The air inlet contour line 12 and the air outlet contour line 13 are connected by arcs on the flanks of the heat exchanger fin. There is a single maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1. Along a direction from a first end to a second end of the air inlet contour line 12, the maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically,The point of maximum distance 14 lies within a region where the inlet airflow volume is at its maximum. This allows for an increase in the size of a region of fin body 1 where the air volume is high and a reduction in the size of a region of fin body 1 where the air volume is low, thereby improving the utilization of fin body 1 and enhancing heat transfer efficiency when fin body 1 is fitted with the coolant pipe. Furthermore, at the point of maximum distance 14, whether on the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of fin body 1, the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 is H3.which corresponds to the internal diameter of the refrigerant pipe mounting hole 11, which is P1; whereas at a first position point 17, either on the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of fin body 1, the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 is H4, which corresponds to the internal diameter of the refrigerant pipe mounting hole 11, which is P2, where H3>H4 and P1>P2. In other words, the greater the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, the greater the internal diameter of the corresponding refrigerant pipe mounting hole 11. It should be noted that, as shown in Figure 2,Both the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1 are provided with a processing notch 15, in order to facilitate the adaptation of the fin body 1 during processing. Implementation method 3 In this embodiment, a heat exchanger fin is provided. As shown in Figure 3, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape. The distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1,Whether along a straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or along a straight line of the radius of curvature of the air inlet contour line 12 of fin body 1, it gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently,The internal diameter of the refrigerant pipe mounting hole 11 also gradually decreases from the center toward the flanks of the heat exchanger fin; and the internal diameter of each refrigerant pipe mounting hole 11 is linearly and positively correlated with the distance between the centers of the circles of any two adjacent refrigerant pipe mounting holes 11. The air inlet contour line 12 and the air outlet contour line 13 are connected by arcs on the flanks of the heat exchanger fin. There is a unique maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1. Along a direction from a first end to a second end of the air inlet contour line 12,The maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically, the maximum distance point 14 lies within a region where the air volume of the inlet airflow is at its maximum, allowing for an increase in the size of a region of fin body 1 where the air volume is high and a decrease in the size of a region of fin body 1 where the air volume is low, thereby improving the utilization of fin body 1 and thus enhancing heat transfer efficiency when fin body 1 is fitted with the coolant piping. Furthermore, at the maximum distance point 14,whether on the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of fin body 1, the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 is H3; the distance between the centers of the circles of two adjacent coolant pipe mounting holes 11 is Q1, which corresponds to the internal diameter of the coolant pipe mounting hole, which is P1; whereas at a first position point 17, whether on the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of fin body 1,The distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1 is H4; the distance between the centers of the circles of two adjacent refrigerant pipe mounting holes 11 is Q2, which corresponds to the internal diameter of the refrigerant pipe mounting hole, which is P2, where H3>H4, Q1>Q2 and P1>P2. In other words, the greater the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1, the greater the distance between the centers of the circles of adjacent refrigerant pipe mounting holes 11, and the greater the internal diameter of the corresponding refrigerant pipe mounting hole 11. It should be noted that, as shown in Figure 3, both the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1 are provided with a process notch 15,in order to facilitate the adaptation of fin body 1 during processing. Implementation method 4 In this embodiment, a heat exchanger fin is provided. As shown in Figure 1, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, whether along a straight line with the radius of curvature of the air outlet contour line 13 of fin body 1 or along a straight line with the radius of curvature of the air inlet contour line 12 of fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the coolant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the air inlet contour line 12 and the air outlet contour line 13 are connected by arcs at the flanks of the heat exchanger fin. There is a single maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1.Along a direction from one end to the other of the air inlet contour line 12, the maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically, the maximum distance point 14 lies within a region where the air volume of the inlet airflow is at its maximum, allowing for an increase in the size of a region of the fin body 1 where the air volume is high and a decrease in the size of a region of the fin body 1 where the air volume is low, thereby improving the utilization of the fin body 1 and thus enhancing heat transfer efficiency when the fin body 1 is fitted with the coolant piping. As shown in Figure 4, the air inlet contour line 12 of fin body 1 overlaps with part of the air outlet contour line 13 after a translational movement. This minimizes the area of ​​a waste region between two adjacent fin bodies 1 on a complete piece of raw material when processing fin body 1, so that the waste region 5 exists only between the flanks of adjacent fin bodies 1. This improves material utilization and reduces manufacturing costs. Both the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 are provided with a process notch 15 to facilitate fitting of fin body 1 during processing.The process notch 15 on the air inlet contour line 12 of each fin body 1 corresponds to the process notch 15 on the air outlet contour line 13 of the adjacent fin body 1, to facilitate fitting during processing. In the present embodiment, during the manufacture of the heat exchanger fin, the waste rate can be controlled below 6%, which is even lower than that of the traditional adaptation of non-standard shaping from a rectangular sheet. Implementation method 5 In this embodiment, a heat exchanger fin is provided. As shown in Figure 1, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, whether along a straight line with the radius of curvature of the air outlet contour line 13 of fin body 1 or along a straight line with the radius of curvature of the air inlet contour line 12 of fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the coolant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the air inlet contour line 12 and the air outlet contour line 13 are connected by arcs at the flanks of the heat exchanger fin. There is a single maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1.Along a direction from one end to the other of the air inlet contour line 12, the maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically, the maximum distance point 14 lies within a region where the air volume of the inlet airflow is at its maximum, allowing for an increase in the size of a region of the fin body 1 where the air volume is high and a decrease in the size of a region of the fin body 1 where the air volume is low, thereby improving the utilization of the fin body 1 and thus enhancing heat transfer efficiency when the fin body 1 is fitted with the coolant piping. As shown in Figure 4, both the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 are provided with a process notch 15 to facilitate the adaptation of fin body 1 during processing. The air inlet contour line 12 of fin body 1 overlaps with part of the air outlet contour line 13 after a translational movement, thereby minimizing the area of ​​a waste region between two adjacent fin bodies 1 in a complete piece of raw material when processing fin body 1, so that the waste region 5 exists only between the flanks of adjacent fin bodies 1. As shown in Figure 1, the entire length of the air inlet contour line 12 of fin body 1 is unevenly divided by the straight line corresponding to the maximum distance, where the length of the portion of the air inlet contour line 12 that lies above the straight line corresponding to the maximum distance is longer than the length of the portion of the air inlet contour line 12 that lies below the straight line corresponding to the maximum distance. Consequently, the length of the portion of the air outlet contour line 13 of fin body 1 that lies above the straight line corresponding to the maximum distance is longer than the length of the portion of the air outlet contour line 13 that lies below the straight line corresponding to the maximum distance.In some examples, the air inlet contour line 12 of fin body 1 includes five arc segments connected in sequence, and adjacent arc segments have curvatures that gradually decrease from the center towards the flanks of the heat exchanger fin; accordingly, the air outlet contour line 13 also includes five arc segments connected in sequence, and each arc segment of the air outlet contour line 13 has an identical curvature to that of the corresponding arc segment of the air inlet contour line 12, so that fin body 1 is divided into five regions with different curvatures from top to bottom.On the straight line of the curvature radius of the air outlet contour line 13 of the fin body 1, H1, H2, H3, H4 and H5 are respective distances between the air inlet contour line 12 and the air outlet contour line 13 within the five regions, where H1<H2<H3 and H5<H4<H3. In some examples, the plane in which the air inlet direction for fin body 1 lies is called first plane 61, i.e., the horizontal plane shown in Figure 1 is first plane 61; a plane that is perpendicular to first plane 61 is second plane 62, i.e., the vertical plane shown in Figure 1 is second plane 62. Fin body 1 has a projection size L1 in second plane 62; the portion of fin body 1 above the straight line corresponding to the maximum distance has a projection size L2 in first plane 61 and a projection size L5 in second plane 62; and the portion of fin body 1 below the straight line corresponding to the maximum distance has a projection size L3 in first plane 61 and a projection size L4 in second plane 62, where L3 <L2<L1 y L4<L5. It should be noted that, for the heat exchanger fin in this embodiment, the related projection size may also be L2L3 and / or L5L4. In some examples, the fin body 1 may also be symmetrical with respect to the straight line corresponding to the maximum distance. The maximum distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 is found on the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of fin body 1. The straight line on which the maximum distance is found is the straight line corresponding to the maximum distance. Implementation method 6 In this embodiment, a heat exchanger fin is provided. As shown in Figure 5, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1, whether along a straight line with the radius of curvature of the air outlet contour line 13 of the fin body 1 or along a straight line with the radius of curvature of the air inlet contour line 12 of the fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the coolant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the air inlet contour line 12 and the air outlet contour line 13 are connected by arcs on the flanks of the heat exchanger fin. The heat exchanger fin is formed as an equidistant region 16 at the center.Within the equidistant region 16, the distance between the air inlet contour line 12 and the air outlet contour line 13 is equal along the straight line of the radius of curvature of the air outlet contour line 13 of the fin body 1. In other words, there is more than one maximum distance H3 between the air inlet contour line 12 and the air outlet contour line 13; and all points of maximum distance 14 are within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12 along a first end to a second end of the air inlet contour line 12. Specifically, the air inlet contour line 12 and the air outlet contour line 13 within the equidistant region 16 are arcs, which are concave in the direction from the air inlet side to the air outlet side.The equidistant region 16 is located at the center, where the volume of air in the inlet airflow is at its maximum. This allows for an increase in the size of a region of fin body 1 where the air volume is high and a reduction in the size of a region where the air volume is low, thereby improving the utilization of fin body 1 and enhancing heat transfer efficiency when the fin body 1 is fitted with the coolant pipe. It is worth noting that, as shown in Figure 5, both the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 are provided with a process notch 15 to facilitate fitting the fin body 1 during machining. Implementation method 7 In this embodiment, a heat exchanger fin is provided. As shown in Figure 6, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1, whether along a straight line with the radius of curvature of the air outlet contour line 13 of the fin body 1 or along a straight line with the radius of curvature of the air inlet contour line 12 of the fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the coolant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the air inlet contour line 12 and the air outlet contour line 13 are connected by arcs on the flanks of the heat exchanger fin. The heat exchanger fin is formed as an equidistant region 16 at the center.Within the equidistant region 16, the distance between the air inlet contour line 12 and the air outlet contour line 13 is equal along the straight line of the radius of curvature of the air outlet contour line 13 of the fin body 1. In other words, there is more than one maximum distance H3 between the air inlet contour line 12 and the air outlet contour line 13; and all points of maximum distance 14 are within an interval of between 1 / 5 and 4 / 5 of the air inlet contour line 12 along a first end to a second end of the air inlet contour line 12. Specifically, the air inlet contour line 12 and the air outlet contour line 13 within the equidistant region 16 are straight lines, which are perpendicular to the air inlet direction.The equidistant region 16 is located at the center, where the volume of air in the inlet airflow is at its maximum. This allows for an increase in the size of a region of fin body 1 where the air volume is high and a reduction in the size of a region where the air volume is low, thereby improving the utilization of fin body 1 and enhancing heat transfer efficiency when the fin body 1 is fitted with the coolant pipe. It is worth noting that, as shown in Figure 6, both the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 are provided with a process notch 15 to facilitate fitting the fin body 1 during machining. Implementation method 8 In this embodiment, a heat exchanger fin is provided. As shown in Figure 1, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, whether along a straight line with the radius of curvature of the air outlet contour line 13 of fin body 1 or along a straight line with the radius of curvature of the air inlet contour line 12 of fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin. Consequently, the internal diameter of the coolant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; and the air inlet contour line 12 and the air outlet contour line 13 are connected by arcs at the flanks of the heat exchanger fin. There is a single maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1.Along a direction from one end to the other of the air inlet contour line 12, the maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically, the maximum distance point 14 lies within a region where the air volume of the inlet airflow is at its maximum, allowing for an increase in the size of a region of the fin body 1 where the air volume is high and a decrease in the size of a region of the fin body 1 where the air volume is low, thereby improving the utilization of the fin body 1 and thus enhancing heat transfer efficiency when the fin body 1 is fitted with the coolant piping.The distance between adjacent refrigerant pipe mounting holes 11 is positively correlated with the diameter of the refrigerant pipe mounting hole 11; i.e., the larger the diameter of the refrigerant pipe mounting hole 11, the greater the distance between adjacent refrigerant pipe mounting holes 11. As shown in Figure 4, the air inlet contour line 12 of fin body 1 overlaps with part of the air outlet contour line 13 after a translational movement, thereby minimizing the area of ​​a waste region between two adjacent fin bodies 1 in a complete piece of raw material when processing fin body 1, so that the waste region 5 exists only between the flanks of adjacent fin bodies 1. Both the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 are provided with a process notch 15. The process notch 15 on the air inlet contour line 12 of each fin body 1 corresponds to the process notch 15 on the air outlet contour line 13 of the adjacent fin body 1, to facilitate fitting during processing. As shown in Figure 1, the entire length of the air inlet contour line 12 of fin body 1 is unevenly divided by the straight line corresponding to the maximum distance, where the length of the portion of the air inlet contour line 12 that lies above the straight line corresponding to the maximum distance is longer than the length of the portion of the air inlet contour line 12 that lies below the straight line corresponding to the maximum distance. Consequently, the length of the portion of the air outlet contour line 13 of fin body 1 that lies above the straight line corresponding to the maximum distance is longer than the length of the portion of the air outlet contour line 13 that lies below the straight line corresponding to the maximum distance.Specifically, the air inlet contour line 12 of fin body 1 includes five arc segments connected in sequence, and adjacent arc segments have curvatures that gradually decrease from the center towards the flanks of the heat exchanger fin; accordingly, the air outlet contour line 13 of fin body 1 also includes five arc segments connected in sequence, and each arc segment of the air outlet contour line 13 has an identical curvature to that of the corresponding arc segment of the air inlet contour line 12, so that fin body 1 is divided into five regions with different curvatures from top to bottom.On the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1, H1, H2, H3, H4 and H5 are respective distances between the air inlet contour line 12 and the air outlet contour line 13 within the five regions, where H3 is the maximum distance, H1 <H2<H3 y H5<H4<H3. Además, el plano en el que se encuentra la dirección de entrada de aire para el cuerpo de aleta 1 se denomina primer plano 61, es decir, el plano horizontal mostrado en la Figura 1 es el primer plano 61; un plano perpendicular al primer plano 61 es un segundo plano 62, es decir, el plano vertical mostrado en la Figura 1 es el segundo plano 62.Fin body 1 has a projection size L1 in the second plane 62; the portion of fin body 1 located above the straight line corresponding to the maximum distance has a projection size L2 in the first plane 61 and a projection size L5 in the second plane 62; and the portion of fin body 1 located below the straight line corresponding to the maximum distance has a projection size L3 in the first plane 61 and a projection size L4 in the second plane 62, where L3 <L2<L1 y L4<L5. It should be noted that, for the heat exchanger fin in this embodiment, the related projection size can also be L2L3 and / or L5L4. In some examples, the fin body 1 can also be symmetrical with respect to the straight line corresponding to the maximum distance. The maximum distance between the air inlet contour line and the air outlet contour line of the fin body lies on the straight line of the radius of curvature of the air outlet contour line 12 of the fin body, or on the straight line of the radius of curvature of the air inlet contour line of the fin body. The straight line on which the maximum distance lies is the straight line corresponding to the maximum distance. Implementation method 9 In this embodiment, a heat exchanger fin is provided. As shown in Figure 1, the heat exchanger fin includes a fin body 1 integrally formed. The fin body 1 includes an air outlet contour line 13 arranged on one side and an air inlet contour line 12 arranged on the other side; and the fin body 1 is provided with a plurality of refrigerant pipe mounting holes 11 to allow the assembly of refrigerant pipes. The fin body 1 is concave in one direction from an air inlet side to an air outlet side, adopting a curved shape.The distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1, whether in a straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or in a straight line of the radius of curvature of the air inlet contour line 12 of fin body 1, gradually decreases from the center towards the flanks of the heat exchanger fin.Consequently, the internal diameter of the refrigerant pipe mounting hole 11 also gradually decreases from the center towards the flanks of the heat exchanger fin; the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1 corresponding to the refrigerant pipe mounting hole 11 is positively correlated with the internal diameter of the refrigerant pipe mounting hole 11; and the internal diameter of each refrigerant pipe mounting hole 11 is linearly and positively correlated with the distance between the centers of the circles of any two adjacent refrigerant pipe mounting holes 11. The air inlet contour line 12 and the air outlet contour line 13 are connected by arcs on the flanks of the heat exchanger fin.There is a unique maximum value H3 for the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1. Along a direction from a first end to a second end of the air inlet contour line 12, the maximum distance point 14 lies within a range of between 1 / 5 and 4 / 5 of the air inlet contour line 12; and a straight line on which the maximum distance point 14 lies extends along an air inlet direction for the heat exchanger fin. Specifically, as shown in Figure 3, the maximum distance point 14 lies within a region where the inlet airflow volume is at its maximum. This allows for an increase in the size of a region of fin body 1 where the air volume is high and a reduction in the size of a region where the air volume is low, thereby improving the utilization of fin body 1 and enhancing heat transfer efficiency when the fin body 1 is fitted with the coolant pipe. Furthermore, at the maximum distance point 14, whether on the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of fin body 1, the distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 is H3.This corresponds to the internal diameter of the refrigerant pipe mounting hole 11, which is P1, and the distance between the centers of the circles of two adjacent refrigerant pipe mounting holes 11 is Q1; whereas at a first position point 17, either on the straight line of the radius of curvature of the air outlet contour line 13 of the fin body 1 or on the straight line of the radius of curvature of the air inlet contour line 12 of the fin body 1, the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1 is H4, which corresponds to the internal diameter of the refrigerant pipe mounting hole 11, which is P2, and the distance between the centers of the circles of two adjacent refrigerant pipe mounting holes 11 is Q2, where H3>H4, P1>P2, and Q1>Q2. In other words,The greater the distance between the air inlet contour line 12 and the air outlet contour line 13 of the fin body 1, the greater the distance between the centers of the circles of two adjacent coolant pipe mounting holes 11, and the greater the internal diameter of the corresponding coolant pipe mounting hole 11. As shown in Figure 4, the air inlet contour line 12 of fin body 1 overlaps with part of the air outlet contour line 13 after a translational movement, thereby minimizing the area of ​​a waste region between two adjacent fin bodies 1 in a complete piece of raw material when processing fin body 1, so that the waste region 5 exists only between the flanks of adjacent fin bodies 1. Both the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 are provided with a process notch 15. The process notch 15 on the air inlet contour line 12 of each fin body 1 corresponds to the process notch 15 on the air outlet contour line 13 of the adjacent fin body 1, to facilitate fitting during processing. As shown in Figure 1, the entire length of the air inlet contour line 12 of fin body 1 is unevenly divided by the straight line corresponding to the maximum distance, where the length of the portion of the air inlet contour line 12 that lies above the straight line corresponding to the maximum distance is longer than the length of the portion of the air inlet contour line 12 that lies below the straight line corresponding to the maximum distance. Consequently, the length of the portion of the air outlet contour line 13 of fin body 1 that lies above the straight line corresponding to the maximum distance is longer than the length of the portion of the air outlet contour line 13 that lies below the straight line corresponding to the maximum distance.Specifically, the air inlet contour line 12 of fin body 1 includes five arc segments connected in sequence, with adjacent arc segments exhibiting curvatures that gradually decrease from the center toward the flanks of the heat exchanger fin. Consequently, the air outlet contour line 13 also includes five arc segments connected in sequence, each arc segment having a curvature identical to that of the corresponding arc segment on the air inlet contour line 12, such that fin body 1 is divided into five regions with different curvatures from top to bottom. On the straight line of the radius of curvature of the air outlet contour line 13 of fin body 1, H1, H2, H3, H4, and H5 are the respective distances between the air inlet contour line 12 and the air outlet contour line 13 within the five regions, where H3 is the maximum distance, H1. <h2<h3 y h5<h4<h3. además, el plano en que se encuentra la dirección de entrada aire para cuerpo aleta 1 denomina primer 61, es decir, horizontal mostrado figura 61; un perpendicular al 61 segundo 62, vertical 62. el tiene tamaño proyección l1 62; parte del situada por encima línea recta correspondiente a distancia máxima l2 l5 debajo l3 l4 donde l3<l2<l1 l4<l5. It should be noted that, for the heat exchanger fin in this embodiment, the related projection size may also be L2L3 and / or L5L4. In some examples, the fin body 1 may also be symmetrical with respect to the straight line corresponding to the maximum distance. The maximum distance between the air inlet contour line 12 and the air outlet contour line 13 of fin body 1 is found on a straight line of the radius of curvature of the air outlet contour line 13 of fin body 1 or on a straight line of the radius of curvature of the air inlet contour line 12 of fin body 1. The straight line on which the maximum distance is found is the straight line corresponding to the maximum distance. Implementation method 10 In this embodiment, a heat exchanger is provided that includes a plurality of heat exchanger fins as defined in any one of embodiments 1 to 9, and a coolant pipe. The plurality of heat exchanger fins are arranged side by side, and the distance between any two adjacent heat exchanger fins is not less than a predetermined interval to ensure normal circulation of the inlet airflow. The pipe diameter of the coolant pipe matches the diameter of a coolant pipe mounting hole 11 of the heat exchanger fin.The coolant piping is arranged so that it passes through the coolant piping mounting hole 11, allowing for air heat exchange when the inlet airflow comes into contact with the heat exchanger, thereby achieving heat exchange via the heat exchanger. The heat exchanger of this embodiment exhibits all the beneficial advantages described for the heat exchanger fin as described in any one of the embodiments 1 to 9 above, which are not detailed herein. Implementation method 11 In this embodiment, an indoor unit is provided. As shown in Figure 7, the indoor unit includes a housing 4, a fan 3, and a heat exchanger 2, as described in the previous embodiment 10. The housing 4 is provided with an air inlet (not shown in Figure 7) and an air outlet 41. The fan 3 and the heat exchanger 2 are arranged inside the housing 4, where the fan 3 directs air from the air inlet to the air outlet 41. The heat exchanger 2 is positioned between the fan 3 and the air outlet 41 of the housing 4, and is oriented accordingly to the fan 3, allowing heat exchange of the airflow from the fan 3 before its discharge through the air outlet 41 of the housing 4, thereby achieving air temperature control.The indoor unit of this embodiment presents all the beneficial advantages described for the heat exchanger 2 as described in the previous embodiment 10, which is not detailed here. Implementation method 12 In this embodiment, an air conditioner is provided that includes an outdoor unit and the indoor unit described in the previous embodiment 11, which is connected to the outdoor unit. This connection allows for heat exchange between the outdoor and indoor units via refrigerant interaction, thereby achieving air temperature control. The air conditioner in this embodiment offers all the beneficial advantages described for the indoor unit in the previous embodiment 11, which are not detailed here. The methods of implementing this disclosure are illustrated above with reference to the drawings, which improve the utilization of the heat exchanger fin; facilitate the improvement of heat exchange efficiency and the reduction of energy consumption; and reduce the manufacturing cost by decreasing material waste. In this disclosure, terms such as "first," "second," and "third" are used herein for descriptive purposes and are not intended to indicate or imply relative importance; the term "a plurality of" means two or more of these features, unless otherwise specified; the terms "assembled," "connected," "coupled," "fixed," and the like are used in a broad sense and may be, for example, fixed connections, separable connections, or integral connections; they may also be direct connections or indirect connections by means of intermediate structures, which those skilled in the art may understand according to specific situations. In the description of this disclosure, terms indicating orientation or positional relationship, such as "above," "below," "left," "right," "front," "back," and the like, should be understood as referring to the orientation or positional relationship described or shown in the drawings. These terms are used solely for the sake of clarity and convenience of description and do not, by themselves, indicate or imply that the device or unit referred to must have, or be configured or operated in, a particular orientation. Therefore, they cannot be construed as a limitation of this disclosure. References throughout this disclosure to "an embodiment," "some embodiments," "an example," "a specific example," or "some examples" mean that a particular feature, structure, material, or characteristic described in relation to the embodiment or example is included in at least one embodiment or example of this disclosure. Therefore, the occurrence of expressions such as "in some embodiments," "in one embodiment," "in another example," "in an example," "in a specific example," or "in some examples" in various places throughout this disclosure does not necessarily refer to the same embodiment or example of this disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any appropriate manner in one or more embodiments or examples.

Claims

1. A heat exchanger fin, comprising: a fin body (1), comprising an air outlet contour line (13) disposed on one side and an air inlet contour line (12) disposed on the other side, and provided with a plurality of coolant pipe mounting holes (11), the heat exchanger fin being characterized in that the distance between the air inlet contour line (12) and the air outlet contour line (13) of the fin body (1), either along a straight line of the radius of curvature of the air outlet contour line (13) of the fin body (1) or along a straight line of the radius of curvature of the air inlet contour line (12) of the fin body (1), gradually decreases from the center towards the flanks of the heat exchanger fin.

2. Heat exchanger fin according to claim 1,wherein the fin body (1) is a one-piece structure.

3. The heat exchanger fin according to claim 1 or 2, wherein the fin body (1) is concave in a direction from an air inlet side to an air outlet side of the fin body (1), and at least part of the air outlet contour line (13) overlaps with the air inlet contour line (12) after a translational movement.

4. The heat exchanger fin according to claim 3, wherein a first end and a second end of the air inlet contour line (12) are connected to the air outlet contour line (13),respectively; a point of maximum distance is located within a range of between 1 / 5 and 4 / 5 of the air inlet contour line (12) along the direction from the first end to the second end of the air inlet contour line (12).

5. The heat exchanger fin according to claim 4, wherein a straight line corresponding to the maximum distance extends along an air inlet direction for the heat exchanger fin.

6. The heat exchanger fin according to claim 5, wherein the fin body (1) is symmetrical with respect to the straight line corresponding to the maximum distance.

7. The heat exchanger fin according to claim 5,wherein the length of the air inlet contour line (12) on one side of the straight line corresponding to the maximum distance is greater than the length of the air inlet contour line (12) on the other side of the straight line corresponding to the maximum distance.

8. The heat exchanger fin according to claim 7, wherein the air outlet contour line (13) comprises five arc segments connected in sequence, and the adjacent arc segments have curvatures that gradually decrease from the center towards the flanks of the heat exchanger fin.

9. The heat exchanger fin according to claim 5, wherein a plane in which the air inlet direction for the fin body (1) lies is a first plane (61),and a plane perpendicular to the first plane (61) is a second plane (62); and the fin body (1) has a larger projection size in the second plane (62) than in the first plane (61).

10. The heat exchanger fin according to claim 9, wherein the fin body (1) has a larger projection size in the second plane (62) on one side of the straight line corresponding to the maximum distance than in the second plane (62) on the other side of the straight line corresponding to the maximum distance, or wherein the fin body (1) has a larger projection size in the first plane (61) on one side of the straight line corresponding to the maximum distance than in the first plane (61) on the other side of the straight line corresponding to the maximum distance.

11. The heat exchanger fin according to any one of claims 1 to 10,wherein the heat exchanger fin is formed as an equidistant region (16) at the center, and the distance between the air inlet contour line (12) and the air outlet contour line (13) is equal within the equidistant region (16), optionally wherein the air inlet contour line (12) and the air outlet contour line (13) within the equidistant region (16) are any one of or any combination of an arc and a straight line.

12. The heat exchanger fin according to any one of claims 1 to 11, wherein the number of coolant pipe mounting holes (11) gradually decreases from the center towards the flanks of the heat exchanger fin, optionally,wherein the distance between adjacent refrigerant pipe mounting holes (11) is positively correlated with the diameter of the refrigerant pipe mounting hole (11).

13. The heat exchanger fin according to any one of claims 1 to 12, wherein the internal diameter of the refrigerant pipe mounting hole (11) gradually decreases from the center towards the flanks of the heat exchanger fin.

14. The heat exchanger fin according to any one of claims 1 to 13, wherein the distance between the air inlet contour line (12) and the air outlet contour line (13) of the fin body (1) corresponding to the refrigerant pipe mounting hole (11) is positively correlated with the internal diameter of each refrigerant pipe mounting hole (11).in a straight line of the radius of curvature of the air outlet contour line (13) of the fin body (1) or in a straight line of the radius of curvature of the air inlet contour line (12) of the fin body (1), and / or wherein the internal diameter of each coolant pipe mounting hole (11) is linearly and positively correlated with the distance between the centers of the circles of any two adjacent coolant pipe mounting holes (11), either in a straight line of the radius of curvature of the air outlet contour line (13) of the fin body (1) or in a straight line of the radius of curvature of the air inlet contour line (12) of the fin body (1).

15. A heat exchanger (2), comprising: a plurality of heat exchanger fins as defined in any one of claims 1 to 14, arranged side by side,wherein the distance between any two adjacent heat exchanger fins is not less than a predetermined interval; and a coolant pipe, wherein the pipe diameter of the coolant pipe is fitted to the size of a coolant pipe mounting hole (11) of the heat exchanger fin, and the coolant pipe passes through the coolant pipe mounting hole (11).

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