Heat exchanger fins and heat exchanger

Abstract

The present application provides a heat exchanger fin and a heat exchanger. The fin comprises a fin body, which is provided with a windward region, a middle region, and a leeward region arranged along a first direction. The middle region is provided with a mounting hole for mounting a refrigerant pipe, and the windward region is provided with a drainage structure that diverts flow along a second direction, the second direction being perpendicular to the first direction and the axial direction of the mounting hole. The fin provided in the present application can increase drainage speed and improve heat exchanger performance.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a fin of a heat exchanger and a heat exchanger. Background Art

[0002] During heat pump system operation, the refrigerant temperature inside the indoor heat exchanger is high, dissipating heat indoors, while the refrigerant temperature inside the outdoor heat exchanger is low, absorbing heat from the outside. When the outdoor air is cold and humid, water vapor in the air tends to condense on the heat exchanger, forming condensate. If the heat exchanger temperature is below the freezing point of water, this condensate will further condense into frost or ice. Heat exchangers primarily exchange heat with the air through their fins. Failure to drain the liquid from the fins during the heat exchange process will accelerate frost formation. Failure to drain the liquid in a timely manner during defrosting will slow the defrosting process and affect heat exchanger performance. Summary of the Invention

[0003] In order to solve the above technical problems, the present application provides a fin of a heat exchanger and a heat exchanger, so as to improve the technical problem that the performance of the heat exchanger is reduced due to frost on the fins.

[0004] A technical solution adopted in the present application is: to provide a fin of a heat exchanger, which includes a fin body, and the fin body is provided with a windward area, a middle area and a leeward area arranged along a first direction, wherein the middle area is provided with an installation hole for installing a refrigerant pipe, and the windward area is provided with a drainage structure for diverting flow along a second direction, and the second direction is perpendicular to the first direction and the axial direction of the installation hole.

[0005] The drainage structure includes a flat portion and a raised portion arranged along a first direction, and a size of the flat portion along the first direction is 0.1 mm to 0.5 mm.

[0006] The drainage structure includes a first guide groove and a second guide groove spaced apart along a first direction, wherein the notch of the first guide groove and the notch of the second guide groove are respectively arranged on two side surfaces of the windward area that are axially opposite to each other.

[0007] In which, along the first direction, a first flat portion is formed between the first guide groove and the second guide groove, and a second flat portion is formed between the first guide groove and the edge of the side of the windward area away from the middle area; in the axial direction, the groove wall of the first guide groove is protruded relative to the first flat portion and the second flat portion, and the groove wall of the second guide groove is protruded relative to the first flat portion; in which, the dimensions of the first guide groove and the second guide groove along the first direction, the dimensions of the first guide groove and the second guide groove along the axial direction, and the dimensions of the first flat portion and the second flat portion along the first direction are all 0.1mm-0.5mm.

[0008] A third guide groove is further formed in the middle area, and the notch of the third guide groove is arranged on the same side as the notch of the second guide groove.

[0009] The third guide groove includes an annular guide groove surrounding the circumference of the mounting hole and a fourth guide groove connected to the annular guide groove and extending along the second direction.

[0010] The fin further includes a connecting plate connected to a side of the windward region away from the middle region along a first direction, wherein the connecting plate is arranged obliquely to the windward region.

[0011] The connecting plate includes a plurality of sub-connecting plates, which are connected to a side of the windward area away from the middle area at intervals along the second direction.

[0012] The plurality of sub-connecting plates include a plurality of first sub-connecting plates and a plurality of second sub-connecting plates, and the first sub-connecting plates and the second sub-connecting plates are respectively inclined at two side surfaces that are axially opposite to each other and arranged toward the windward area.

[0013] The present application provides a heat exchanger, which includes the above-mentioned fins and a refrigerant tube, and the refrigerant tube is installed in the installation hole of the fin.

[0014] The beneficial effects of the present application are as follows: the fin provided by the present application includes a fin body, the fin body being provided with a windward region, a middle region, and a leeward region arranged along a first direction, wherein the middle region is provided with a mounting hole for mounting a refrigerant pipe, and the windward region is provided with a drainage structure for diverting flow along a second direction, wherein the second direction is perpendicular to the first direction and the axial direction of the mounting hole. Since the windward region of the fin body is exposed to the airflow before the middle region and the leeward region, air first forms condensed water in the windward region of the fin body. The present application provides a drainage structure for diverting flow along the second direction in the windward region, that is, provides a drainage structure in the region where condensed water is first formed, which can speed up the discharge of condensed water from the fin body, thereby delaying the time it takes for the fins to frost, and thereby improving the performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0016] Figure 1 This is a structural diagram of an embodiment of the oil stain adhesion device provided by the present application;

[0017] Figure 2 This is a structural diagram of an embodiment of a fin provided by the present application;

[0018] Figure 3 yes Figure 2 A structural diagram of another view of the embodiment;

[0019] Figure 4 This is a structural diagram of an embodiment of a drainage structure provided by the present application;

[0020] Figure 5 This is a structural diagram of an embodiment of a drainage structure provided by the present application;

[0021] Figure 6 This is a structural diagram of an embodiment of a fourth guide channel provided by the present application;

[0022] Figure 7 It is a structural schematic diagram of another embodiment of the fin provided in this application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0026] This application provides a heat exchanger, see Figure 1 , Figure 1: This is a structural diagram of an embodiment of a heat exchanger provided by the present application. The heat exchanger 01 includes a refrigerant tube 20 and a fin 10. The fin 10 is provided with a mounting hole, and the refrigerant tube 20 is mounted in the mounting hole. The refrigerant tube 20 is in close contact with the fin 10, so the temperature of the fin 10 is close to the temperature of the refrigerant tube 20. The heat exchanger 01 includes an air inlet side and an air outlet side. The airflow direction refers to the direction of the airflow from the air inlet side to the air outlet side. When the airflow flows from the air inlet side to the air outlet side, that is, when the airflow flows through the gap between the fins 10, the heat exchange with the fins 10 and the refrigerant tube 20 is completed.

[0027] To clearly illustrate the structure of the fin body, the fin body is divided into an edge region, a middle region, and an edge region located on the other side of the middle region along the airflow direction. That is, along the airflow direction, the fin body is sequentially divided into an edge region, a middle region, and an edge region. The edge region near the air inlet side can be considered the windward region, while the edge region away from the air inlet side or near the air outlet side can be considered the leeward region.

[0028] See Figure 2 and Figure 3 , Figure 2 This is a schematic structural diagram of an embodiment of a fin provided in this application. Figure 3 yes Figure 2 Another structural diagram of the embodiment shows a fin body 100 having a windward region, a middle region, and a leeward region arranged along a first direction X. The middle region is provided with a mounting hole 120 for mounting a refrigerant pipe, and the windward region is provided with a drainage structure 110 for diverting flow along a second direction Y. The second direction Y is perpendicular to the first direction X and the axial direction Z of the mounting hole 120. The first direction X is parallel to the airflow direction.

[0029] It can be seen that when the temperature of the refrigerant in the refrigerant pipe is lower than the ambient air temperature, the temperature of the fin 10 is also lower than the ambient temperature, so condensation or frost can form in the entire fin 10 area. Among them, the windward area of ​​the fin body 100 contacts the airflow first compared to the middle area and the leeward area, so the windward area of ​​the fin body 100 is the first to exchange heat with the airflow, so the air is first condensed in the windward area to form condensation water. When the condensation water flows slowly downward along the edge of the fin 10 under the force of gravity, it is very easy to form frost or ice. That is, if the liquid on the fin body 100 is not discharged in time, it will cause frost to form on the fin 10, or the frost layer is not easy to fall off, which prolongs the defrosting time, etc., resulting in a decrease in the heat exchange performance of the heat exchanger. In order to improve the heat exchange performance of the heat exchanger, the present application sets a drainage structure 110 that guides the flow along the second direction Y in the windward area, which can speed up the speed at which the liquid in the windward area is discharged from the fin body 100, thereby delaying the frosting time of the fin 10, or speeding up the defrosting speed, thereby improving the performance of the heat exchanger.

[0030] When the fins 10 are in use, the first direction X is parallel to the airflow direction, and the second direction Y is parallel to the direction of gravity. For example, during heat exchange between the fin body 100 and the airflow, condensed water formed in the windward area of ​​the fin body 100 can be diverted along the direction of gravity by the drainage structure 110 located in the windward area and promptly discharged from the fin body 100, thereby delaying the formation of frost on the fin body 100 and improving the performance of the heat exchanger. During the defrosting period of the fin body 100, the drainage structure 110 can promptly drain the condensed water formed during the defrosting process from the fin body 100, accelerating the defrosting time while reducing the amount of water accumulated between the fins 10, preventing deterioration during the next frosting cycle and improving the performance of the heat exchanger.

[0031] Optionally, in order to speed up the drainage of liquid on the fin body 100, drainage structures 110 for guiding the liquid along the second direction Y are provided in the edge areas on both sides of the middle area.

[0032] In other embodiments, a plurality of drainage structures 110 are spaced apart in the edge region along the first direction X to accelerate the drainage speed of the liquid on the fin body 100 .

[0033] Optionally, see Figure 4 , Figure 4 This is a schematic diagram of an embodiment of a drainage structure provided by the present application. Drainage structure 110 includes a flat portion 101 and a raised portion 102 arranged along a first direction X. The flat portion 101 has a dimension of 0.1 mm to 0.5 mm along the first direction X. For example, the dimension of the flat portion 101 along the first direction X can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc. The flat portion 101 and raised portion 102 can form a wetting step track, i.e., a guide track based on the wetting step method. The present application utilizes the ultra-narrow width of the flat portion 101 to reduce the contact area between the liquid droplets and the surface of the flat portion 101, thereby effectively reducing the capillary resistance encountered by the liquid droplets. Furthermore, the capillary force exerted by the raised portion 102 on the liquid droplets is greater than the gravity of the liquid droplets, allowing the liquid droplets to converge toward the raised portion 102. This allows the drainage structure 110 to converge along the first direction X, allowing the converged liquid to flow more quickly in the second direction Y under the action of gravity, thereby accelerating the discharge of the liquid droplets from the fin body 100. Furthermore, as the liquid droplets move on the surface of the flat portion 101, the liquid is subjected to the force of the airflow in the first direction X in the windward area of ​​the fin body 100. The side of the flat portion 101 near the middle region is the raised portion 102, which is higher than the flat portion 101 in the axial direction Z of the mounting hole 120. Therefore, a strong energy barrier exists on both sides of the flat portion 101 along the first direction X. The liquid droplets cannot overcome this energy barrier and disperse to the left or right, and are forced to flow in the second direction Y, i.e., the direction of gravity, thereby increasing the liquid discharge rate.

[0034] The flat portion 101 may be a plane surface without any protrusions.

[0035] Optionally, the fin body 100 is stamped and formed, and a guide groove is formed on the back side of the protrusion 102 of the fin body 100. The guide groove can guide the condensed water formed on the back side of the protrusion 102 to accelerate the discharge speed of the liquid.

[0036] Optionally, see Figure 5 , Figure 5 This is a schematic structural diagram of another embodiment of the drainage structure provided by the present application. The drainage structure 110 includes a first guide groove 111 and a second guide groove 112 spaced apart along a first direction X. The notches of the first guide groove 111 and the second guide groove 112 are respectively provided on opposite sides of the windward region along the axial direction Z. It is understood that the first guide groove 111 and the second guide groove 112 are respectively provided on opposite sides of the mounting hole 120 in the axial direction Z of the windward region, so that the first guide groove 111 and the second guide groove 112 can converge and guide liquid on both sides of the windward region, thereby increasing the drainage speed of the windward region, delaying the frosting time or accelerating the defrosting process, and improving the performance of the heat exchanger.

[0037] The first guide groove 111 and the second guide groove 112 can be formed by stamping the fin body 100 .

[0038] Optionally, along the first direction X, a first flat portion 113 is formed between the first guide groove 111 and the second guide groove 112, and a second flat portion 114 is formed between the first guide groove 111 and an edge of the windward region away from the middle region. Along the axial direction Z of the mounting hole 120, the groove wall 115 of the first guide groove protrudes relative to the first flat portion 113 and the second flat portion 114, and the groove wall 116 of the second guide groove protrudes relative to the first flat portion 113. The dimensions of the first guide groove 111 and the second guide groove 112 along the first direction X, the dimensions of the first guide groove 111 and the second guide groove 112 along the axial direction Z, and the dimensions of the first flat portion 113 and the second flat portion 114 along the first direction X are all 0.1 mm to 0.5 mm. In this embodiment, the first flat portion 113 and the groove wall 116 of the second guide groove, the second flat portion 114 and the groove wall 115 of the first guide groove, the first flat portion 113 and the groove wall 115 of the first guide groove, and the groove wall 116 of the second guide groove and the fin body 100 near the middle area can all form a wetting step track, that is, the ultra-narrow width of the first flat portion 113, the second flat portion 114, etc. is utilized to reduce the contact area between the droplet and the surface of the first flat portion 113, the second flat portion 114, etc., thereby effectively reducing the capillary resistance faced by the droplet movement, and the capillary force of the groove wall 115 and the groove wall 116 of the first guide groove on the droplet can be greater than the gravity of the droplet, so that the droplet can move toward the groove wall 115 of the first guide groove and the second guide groove. The groove walls 116 converge, so that the first guide groove 111 and the second guide groove 112 have the function of converging along the first direction X, so that the converged liquid can flow faster along the second direction Y under the action of gravity, and can accelerate the discharge of droplets from the fin body 100; in addition, the first guide groove 111 and the second guide groove 112 can converge and guide the liquid on both sides of the windward area, further accelerating the liquid discharge speed; further, the dimensions of the first guide groove 111 and the second guide groove 112 along the first direction X and the dimensions of the first guide groove 111 and the second guide groove 112 along the axial direction Z are both 0.1mm-0.5mm, so that the droplets can flow without swallowing or gathering each other, which can shorten the time for the droplets to swallow or gather, and achieve rapid drainage.

[0039] Optionally, to accelerate the drainage of liquid from the fin body 100, a third guide groove 130 is further formed in the middle region. The notch of the third guide groove 130 is arranged on the same side as the notch of the second guide groove 112. The third guide groove 130 can be connected to the second guide groove 112. For example, the third guide groove 130 is connected to the second guide groove 112 through other guide grooves. In this embodiment, the third guide groove 130 is provided in the middle region, so that liquid in the middle region can be discharged through the third guide groove 130, which can accelerate the drainage of liquid from the fin body 100 and reduce the amount of residual liquid on the fin body 100.

[0040] Optionally, see Figure 2 Along the first direction X, a first inclined portion 161 and a third flat portion 162 are sequentially disposed between the side of the second guide groove 112 away from the first guide groove 111 and the third guide groove 130. The first inclined portion 161 forms an obtuse angle with the side of the second guide groove 112 away from the first guide groove 111 and the third flat portion 162, respectively. It will be appreciated that in the axial direction Z of the mounting hole 120, the third flat portion 162 is higher than the plane of the opening of the second guide groove 112, and the angle between the third flat portion 162 and the first inclined portion 161 is an obtuse angle. Therefore, the first inclined portion 161 has a diversion function. That is, the liquid on the third flat portion 162 can be accelerated to converge to the second guide groove 112 through the first inclined portion 161, so that the liquid on the third flat portion 162 can be discharged from the fin body 100 through the second guide groove 112, accelerating the discharge of liquid in the middle area of ​​the fin body 100, and reducing the residual amount of liquid on the fin body 100, thereby delaying the time for frost formation on the fin body 100 or accelerating the defrosting speed of the fin body 100, thereby improving the heat exchange performance of the heat exchanger.

[0041] Optionally, see Figure 2 Along the first direction X, the third flat portion 162 is connected to the sidewall of the third guide groove 130 via a second inclined portion 163. The second inclined portion 163 is disposed at an obtuse angle with the sidewall of the third guide groove 130 and the third flat portion 162, respectively. In this embodiment, by providing the second inclined portion 163 and forming an obtuse angle with the sidewall of the third guide groove 130 and the third flat portion 162, the second inclined portion 163 has a diversion function. Liquid on the third flat portion 162 can also be accelerated by the second inclined portion 163 to flow into the third guide groove 130. As a result, the liquid on the third flat portion 162 can also be discharged from the fin body 100 through the third guide groove 130, further accelerating the discharge of liquid from the central region of the fin body 100 and reducing the amount of residual liquid on the fin body 100. This delays the formation of frost on the fin body 100 or accelerates the defrosting of the fin body 100, thereby improving the heat exchange performance of the heat exchanger.

[0042] Optionally, see Figure 2 The third guide groove 130 includes an annular guide groove 131 surrounding the mounting hole 120 and a fourth guide groove 132 extending in the second direction Y and communicating with the annular guide groove 131. The annular guide groove 131 is configured to collect liquid surrounding the mounting hole 120 and guide it along the second direction Y through the fourth guide groove 132 to drain the liquid from the fin body 100, further accelerating the drainage of the liquid from the fin body 100.

[0043] Optionally, the annular guide groove 131 includes an annular bottom wall 1312 and an annular side wall 1311 arranged at an obtuse angle to the annular bottom wall 1312. The annular bottom wall 1312 is used to converge and discharge liquid, and the annular side wall 1311 is used to guide the liquid to the annular bottom wall 1312.

[0044] Optionally, see Figure 6 , Figure 6 This is a schematic diagram of the structure of an embodiment of a fourth guide trough provided by the present application. The fourth guide trough 132 includes a first sidewall 1321 and a second sidewall 1322. The second sidewall 1322 and the bottom wall 1323 of the fourth guide trough are arranged at an obtuse angle, and the connection between the two is arc-shaped. The first sidewall 1321 and the second sidewall 1322 are arranged at an obtuse angle. The second sidewall 1322 and the bottom wall 1323 of the fourth guide trough are used to converge liquid and guide it in the second direction Y. The first sidewall 1321 is used to guide the liquid into the space formed by the second sidewall 1322 and the bottom wall 1323 of the fourth guide trough.

[0045] Specifically, the diversion dimensions of the annular bottom wall 1312 and the bottom wall 1323 of the fourth diversion groove are similar. Referring to the fact that the diameter of the condensation droplets when frosting on the hydrophilic surface is generally less than 0.5 mm, the diversion dimensions of the annular bottom wall 1312 and the bottom wall 1323 of the fourth diversion groove are both 0.1 mm-0.7 mm, for example, they can be 0.4 mm. According to the wettability theory, the capillary length Lc of the droplets on the hydrophilic surface is 2.7 mm, and the gravity cannot be ignored when the diameter is greater than this. Referring to this theory, the diversion dimension between the two first side walls 1321 is 2.2 mm-3.2 mm, for example, it can be 2.2 mm, 2.7 mm, 3.0 mm, 3.2 mm, etc. The diversion dimension of the annular side wall 1311 is approximately 0.5 to 2 times the diversion dimension between the two first side walls 1321.

[0046] Along the axial direction Z of the mounting hole 120, the fourth guide groove 132 is a V-shaped groove, and the bottom wall 1323 of the fourth guide groove can be considered the top of the V-shaped groove. The fourth guide groove 132 is an ultra-narrow hydrophilic V-shaped groove, which allows the defrost water to quickly form a hydrophilic track when the heat exchanger starts defrosting, achieving stable and invisible guidance, thereby achieving faster drainage. Simultaneously, the annular bottom wall 1312 absorbs water droplets from the annular side wall 1311, while residual water on the surface of the fin 10 is absorbed by the first side wall 1321. Ultimately, when defrosting is completed, the residual water on the surface of the fin 10 is drained to the greatest extent possible, reducing the amount of water accumulated between the fins 10 and preventing further deterioration during the next frosting cycle.

[0047] In other embodiments, the fourth guide groove 132 may be a V-shaped guide groove, the top of the V-shaped guide groove is connected to the annular guide groove 131 , and both ends of the V-shaped guide groove are arranged toward the second direction Y, which is not limited here.

[0048] Optionally, a plurality of mounting holes 120 spaced apart along the second direction Y may be provided in the middle region, and the third guide groove 130 is located between adjacent mounting holes 120 .

[0049] The first guide groove 111 , the second guide groove 112 and the fourth guide groove 132 extend continuously along the second direction Y, or are formed to continuously guide flow along the second direction Y through other flow channels.

[0050] Optionally, see Figure 7 , Figure 7 This is a schematic structural diagram of another embodiment of the fin provided by the present application. The fin 10 further includes a connecting plate 150, which is connected to a side of the windward region away from the middle region along a first direction X, wherein the connecting plate 150 is arranged obliquely with respect to the windward region. In this embodiment, the windward area of ​​the fin 10 is increased by providing a connecting plate 150 arranged obliquely with respect to the windward region. Compared with the fin body 100, the connecting plate 150 exchanges heat with the airflow first, so the air first forms condensed water in the area of ​​the connecting plate 150. Since the connection area between the connecting plate 150 and the fin body 100 is far away from the refrigerant pipe 20, the temperature difference of the airflow reaching the refrigerant pipe 20 after passing through the connecting plate 150 is small, which can alleviate the generation of condensed water. In addition, since the connecting plate 150 is far away from the refrigerant pipe 20, the temperature of the connecting plate 150 is relatively high, which can inhibit the process of condensed water solidifying into frost, thereby improving the performance of the heat exchanger.

[0051] Optionally, the connecting plate 150 includes a plurality of sub-connecting plates, which are spaced apart and connected to the side of the windward area away from the middle area along the second direction Y. In the present application, the edge surface of the fin 10 is discontinuous by arranging the sub-connecting plates at intervals along the second direction Y. The thermal conductivity between the fin body 100 and the sub-connecting plates is poorer than that of the sub-connecting plates that are not spaced apart, so that the temperature on the sub-connecting plates is further higher than the temperature of the fin body 100 close to the refrigerant pipe 20, so the condensed water thereon is not easy to frost. In addition, the liquid flow path of a single sub-connecting plate is short, and the condensed water easily falls off in the direction of gravity, thereby delaying the accumulation of the frost layer. Furthermore, during the defrosting process, the temperature of the fin 10 rises, thereby gradually melting the frost layer in contact with the fin 10. Since the frost layer attached to the position of the sub-connecting plate is discontinuous, it is conducive to the frost layer breaking and falling off directly during melting, thereby accelerating the defrosting process.

[0052] Optionally, the plurality of sub-connecting plates 150 include a plurality of first sub-connecting plates 151 and a plurality of second sub-connecting plates 152, wherein the first sub-connecting plates 151 and the second sub-connecting plates 152 are respectively inclined toward the windward region along the axial direction Z, on opposite sides thereof. In this embodiment, by arranging the first sub-connecting plates 151 and the second sub-connecting plates 152 to be inclined toward the windward region along the axial direction Z, the flow path of the liquid along the second direction Y, i.e., the direction of gravity, along the plurality of first sub-connecting plates 151 or the plurality of second sub-connecting plates 152 can be shortened. Condensed water can easily fall off along the direction of gravity, thereby delaying the accumulation of frost. Furthermore, during the defrosting process, the temperature of the fins 10 increases, thereby gradually melting the frost layer in contact with the fins 10. Since the frost layer attached to the first sub-connecting plates 151 and the second sub-connecting plates 152 is discontinuous, the frost layer is facilitated to break and fall off directly during melting, thereby accelerating the defrosting process.

[0053] Among them, a first sub-connecting plate 151 and a second sub-connecting plate 152 can be a group, or the first sub-connecting plate 151 and multiple second sub-connecting plates 152 can be a group, or multiple first sub-connecting plates 151 and second sub-connecting plates 152 can be a group, and multiple groups are arranged along the second direction Y, which is not limited here.

[0054] Optionally, the connecting plate 150 and the fin body 100 are integrally formed.

[0055] In other embodiments, the connecting plate 150 may be regarded as the windward region of the fin 10 . In this case, the drainage structure 110 may be provided at the edge region of the connecting plate 150 , which is not limited here.

[0056] Optionally, the fin body 100 includes slightly angled corrugated fins, with the crests of the slightly angled corrugated fins located between the middle region and the edge regions. That is, crests are provided in both the edge regions and the middle region on both sides of the mounting hole 120, facilitating the flow of liquid from the middle region to the edge regions and out of the fin body 100 through the drainage structures 110 in the edge regions.

[0057] Optionally, along the axial direction Z of the mounting hole 120 , the structures on both sides of the fin body 100 are the same; or one side of the fin body 100 includes the structures of all the above-mentioned fin 10 embodiments, and the other side of the fin body 100 is a flat sheet, which is not limited here.

[0058] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A fin of a heat exchanger, characterized in that: include: A fin body, wherein the fin body is provided with a windward region, a middle region, and a leeward region arranged along a first direction, wherein the middle region is provided with a mounting hole for mounting a refrigerant pipe, and the windward region is provided with a drainage structure for diverting flow along a second direction, wherein the second direction is perpendicular to the first direction and the axial direction of the mounting hole; The drainage structure includes a first guide groove and a second guide groove spaced apart along the first direction, wherein the notch of the first guide groove and the notch of the second guide groove are respectively provided on two side surfaces of the windward area that are opposite to each other along the axial direction; Wherein, along the first direction, a first flat portion is formed between the first guide groove and the second guide groove, and a second flat portion is formed between the first guide groove and an edge of the windward area away from the middle area; Along the axial direction, the groove wall of the first guide groove is protruded relative to the first flat portion and the second flat portion, and the groove wall of the second guide groove is protruded relative to the first flat portion; The dimensions of the first guide groove and the second guide groove along the first direction, the dimensions of the first guide groove and the second guide groove along the axial direction, and the dimensions of the first flat portion and the second flat portion along the first direction are all 0.1 mm to 0.5 mm.

2. The fin according to claim 1, characterized in that A third guide groove is further formed in the middle area, and the notch of the third guide groove is arranged on the same side as the notch of the second guide groove.

3. The fin according to claim 2, characterized in that The third guide groove includes an annular guide groove surrounding the circumference of the mounting hole and a fourth guide groove communicating with the annular guide groove and extending along the second direction.

4. The fin according to any one of claims 1 to 3, characterized in that: The fin further comprises: A connecting plate is connected to a side of the windward area away from the middle area along the first direction, wherein the connecting plate is arranged obliquely to the windward area.

5. The fin according to claim 4, characterized in that The connecting plate includes a plurality of sub-connecting plates connected to a side of the windward area away from the middle area at intervals along the second direction.

6. The fin according to claim 5, characterized in that The plurality of sub-connection plates include: A plurality of first sub-connecting plates and a plurality of second sub-connecting plates, wherein the first sub-connecting plates and the second sub-connecting plates are respectively inclined at two side surfaces disposed opposite to each other along the axial direction toward the windward area.

7. A heat exchanger, characterized in that: include: The fin according to any one of claims 1 to 6; The refrigerant pipe is installed in the installation hole of the fin.

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