Fin and heat exchanger

Abstract

The invention provides a fin and a heat exchanger, and relates to the technical field of air conditioners. The fin structure is provided with a plurality of mounting holes arranged at intervals and a plurality of water guide grooves, and each mounting hole penetrates through the fin in the thickness direction of the fin; the multiple water guide grooves are formed in the first direction of the fin at intervals, the end, in the axial direction of the single water guide groove, of the single water guide groove is defined as the flow upstream, the other end of the single water guide groove is defined as the flow downstream, and the groove depths and / or groove widths of at least part of the water guide grooves are / is gradually decreased from the flow upstream to the flow downstream. A part of the water guide grooves are communicated with the multiple installation holes, and the other part of the water guide grooves and the multiple installation holes are arranged at intervals. And a water guide groove is formed outside the mounting hole to discharge condensate water. The groove depth and / or the groove width of the water guide groove are / is gradually reduced from the flowing upstream to the flowing downstream, and the fluid channel is gradually narrowed, so that the flowing speed of the condensate water is favorably improved, the influence of the retention of the condensate water on heat dissipation is reduced, and the heat exchange efficiency of the fin is favorably improved.

Description

Technical Field

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

[0002] Fin heat exchangers are widely used in the field of air conditioning technology. When the surface temperature of the fin is lower than the dew point temperature of the surrounding air, part of the water in the air will condense on the surface of the fin to form condensed water. The condensed water stays on the surface of the fin for a long time, which hinders the heat transfer effect of the fin and affects the heat exchange efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a fin and a heat exchanger to reduce the retention of condensed water and improve the heat exchange efficiency.

[0004] A fin is constructed with a plurality of spaced mounting holes and a plurality of water guide grooves, wherein each of the mounting holes is arranged through the fin in the thickness direction of the fin; a plurality of water guide grooves are spaced along a first direction of the fin, one end of a single water guide groove along its own axial direction is defined as a flow upstream, and the other end is defined as a flow downstream, and the groove depth and / or groove width of at least some of the water guide grooves gradually decrease from the flow upstream toward the flow downstream; a portion of the water guide grooves are connected to the plurality of mounting holes, and another portion of the water guide grooves are spaced from the plurality of mounting holes.

[0005] It is understandable that the installation hole is used to install the heat exchange tube. A water guide groove is provided outside the installation hole to discharge condensed water. The groove depth and / or groove width of the water guide groove is gradually reduced from the upstream flow to the downstream flow, and the fluid channel gradually narrows, which is conducive to increasing the flow speed of the condensed water. The condensed water can flow from the upstream flow to the downstream flow along the groove wall of the water guide groove under the action of gravity and flow out of the water guide groove, so that the condensed water can be quickly discharged, reducing the influence of the condensed water retention on the heat dissipation, which is conducive to improving the heat exchange efficiency of the fins.

[0006] In one embodiment, the depth of a single water guide groove downstream of the flow accounts for 10%-75% of the depth of the water guide groove upstream of the flow; and / or, the width of a single water guide groove upstream of the flow accounts for 130%-170% of the width of the water guide groove downstream of the flow.

[0007] It can be understood that such a setting is conducive to forming an appropriate slope of the groove wall of the water guide groove to facilitate the flow of fluid along the groove wall, and makes the water guide groove appropriately narrower, thereby increasing the flow rate of condensed water and facilitating the discharge of condensed water.

[0008] In one of the embodiments, the fin has a first side and a second side along the thickness direction of the fin, each of the water guide grooves is recessed from the first side to the second side along the thickness direction of the fin, and multiple water guide grooves are each protruding from the second side; a spacing groove is defined between any two adjacent water guide grooves, and multiple water guide grooves and multiple spacing grooves form corrugated frills located on both sides of the fin along the second direction.

[0009] It can be understood that such an arrangement makes the outer wall of the water guide groove convex on the second side of the fin, so as to cooperate with the spacing groove to form a corrugated hem on the fin to enhance the structural strength.

[0010] In one of the embodiments, at least one of any two adjacent water guide grooves is connected to at least one mounting hole, and the mounting hole divides the corresponding water guide groove into at least two water guide groove sections; the mounting hole passes through the corresponding water guide groove and the spacing grooves located on both sides of the water guide groove, and the mounting hole divides the corresponding spacing groove into at least two spacing groove sections.

[0011] It is understandable that the mounting hole can be used to mount the heat exchange tube, and the arrangement of the water guide groove communicating with the mounting hole facilitates the condensed water on the heat exchange tube to flow into the water guide groove. The spacing groove is communicated with the mounting hole, so that part of the condensed water flows along the spacing groove.

[0012] In one embodiment, at least a portion of the spacing grooves are provided with spoiler holes at their bottoms. The spoiler holes are arranged through the spacing groove segments along the thickness direction of the fins, and are arranged at intervals along the axial direction of the spacing grooves.

[0013] It is understandable that the spoiler holes are provided to disturb the airflow passing through the fins, break the airflow boundary layer, and promote heat dissipation. At the same time, it is also beneficial for the condensed water to form a vortex at the spoiler holes, thereby accelerating the discharge of the condensed water.

[0014] In one embodiment, along the width direction of the spacing groove, the minimum distance between the edge of the spoiler hole and the edge of the water guide groove is A, which accounts for 10%-25% of the width B of the spacing groove at the position corresponding to the spoiler hole.

[0015] It is understandable that such an arrangement allows part of the condensed water to flow around the spoiler holes, which is conducive to forming a narrower flow channel and accelerating the flow rate.

[0016] In one embodiment, along the axial direction of the spacing groove, the minimum distance C between the edge of the spoiler hole and the edge of the mounting hole accounts for 5%-15% of the length D of the spacing groove section between any two adjacent mounting holes; and / or, along the axial direction of the spacing groove, the minimum distance E between the edge of the spoiler hole and the edge of the fin accounts for 5%-15% of the length F of the spacing groove section located at the edge of the fin.

[0017] It is understandable that such an arrangement allows part of the condensed water to flow around the spoiler holes, which is conducive to forming a narrower flow channel and accelerating the flow rate.

[0018] In one embodiment, the spoiler hole is shaped as an ellipse, a circle or a triangle.

[0019] It is understandable that different shapes have different flow-disturbing and flow-promoting effects.

[0020] In one embodiment, the spoiler hole is in the shape of a triangle, and the vertex angle of the triangle is arranged along the axial direction of the spacing groove close to the upstream of the flow; or, the spoiler hole is in the shape of an ellipse, and the major axis of the ellipse is consistent with the width direction of the spacing groove, and the minor axis of the ellipse is consistent with the axial direction of the spacing groove; or, the major axis of the ellipse is consistent with the axial direction of the spacing groove, and the minor axis of the ellipse is consistent with the width direction of the spacing groove.

[0021] It can be understood that when the spoiler hole is set to a triangle, the condensed water first contacts the top corner, the condensed water channel outside the spoiler hole gradually narrows, and the condensed water channel inside the spoiler hole gradually widens, which is conducive to the formation of turbulence. When the spoiler hole is set to an ellipse, the long axis is consistent with the width direction of the spacing groove, which is conducive to setting multiple spoiler holes along the axial direction of the spacing groove; when the long axis is consistent with the axial direction of the spacing groove, it is conducive to prolonging the effect of promoting the flow of condensed water.

[0022] The present application also provides a heat exchanger, comprising a heat exchange tube group, a water receiving tray and the above-mentioned fins; the heat exchange tube group comprises a plurality of interconnected heat exchange tubes, each of the heat exchange tubes passes through a mounting hole of the fin; the water receiving tray is located below the heat exchange tube group along the second direction.

[0023] It can be understood that by using the above-mentioned fins, the condensed water on the fins can be discharged easily, and the water tray can receive and collect the condensed water, thereby avoiding the interference of the condensed water on the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A top view of the local structure of the fin provided in this application;

[0026] Figure 2 A three-dimensional diagram of the local structure of the fin provided for this application;

[0027] Figure 3 A side view of the local structure of the fin provided for this application;

[0028] Figure 4 A perspective view of the heat exchanger provided for this application.

[0029] Figure numerals: 100, heat exchanger; 10, fin; 101, first side; 102, second side; 11, mounting hole; 12, water guide groove; 121, water guide groove section; 1201, upstream flow; 1202, downstream flow; 13, spacing groove; 131, spacing groove section; 132, connecting section; 14, spoiler hole; 20, heat exchange tube group; 21, heat exchange tube. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0035] See also Figures 1 to 4 The present application provides a fin 10, which is constructed with a plurality of water guide grooves 12 and a plurality of spaced mounting holes 11, each mounting hole 11 is arranged through the fin 10 along the thickness direction of the fin 10, and the plurality of water guide grooves 12 are spaced along the width direction (or the first direction) of the fin; one end of a single water guide groove 12 along its own axial direction is defined as a flow upstream 1201, and the other end is defined as a flow downstream 1202, and the groove depth and / or groove width of at least a part of the water guide grooves 12 gradually decreases from the flow upstream 1201 toward the flow downstream 1202; a part of the water guide grooves 12 are connected to the plurality of mounting holes 11, and another part of the water guide grooves 12 are spaced from the plurality of mounting holes 11.

[0036] In this way, the fin 10 is mainly matched with the heat exchange tube 21, and the heat exchange tube 21 is set through the fin 10 through the mounting hole 11, and the medium (such as refrigerant, cooling water) in the heat exchange tube 21 is transferred through the fin 10 to exchange heat with the air to achieve heat exchange. The installation of the mounting hole 11 facilitates the assembly of the fin 10 and the heat exchange tube 21, and its hole wall can form a support for the heat exchange tube 21. The setting of the water guide groove 12 allows condensed water to be formed on the surface of the fin 10, and can also promote the discharge of condensed water on the fin 10, so as to reduce the obstruction of condensed water to the heat transfer efficiency and improve the heat exchange effect. Specifically, when placing the fin 10, the upstream flow 1201 of the water guide groove 12 is located at the upper end of the downstream flow 1202 along the gravity direction, so that the condensed water flows from the upstream flow 1201 to the downstream flow 1202 along the water guide groove 12 under the action of gravity. Since the groove depth and / or groove width of the water guide groove 12 gradually decreases from the upstream flow 1201 to the downstream flow 1202, the flow space in the water guide groove 12 gradually decreases from the upstream flow 1201 to the downstream flow 1202, that is, the water guide groove 12 gradually narrows, so that when the condensed water flows, the fluid pressure gradually decreases, the flow speed of the condensed water is faster, and the condensed water is quickly discharged from the water guide groove 12. At the same time, such a setting is also conducive to the partial groove wall of the water guide groove 12 having a certain slope, which has the effect of guiding and converging the condensed water, and is conducive to the discharge of the condensed water. In summary, the condensed water is discharged by the above setting to reduce the retention of the condensed water, which is conducive to improving the heat dissipation effect of the fin 10.

[0037] For ease of explanation, the present application takes the first direction as the x-axis direction, the second direction as the y-axis direction, and the thickness direction of the fin 10 as the z-axis direction, wherein the first direction is also the width direction of the water guide groove 12, the groove width is also the size of the water guide groove 12 along the first direction, the groove depth is also the size of the water guide groove 12 along the thickness direction of the fin 10, and the water guide groove 12 extends along the second direction, that is, the second direction is the axial direction of the water guide groove 12.

[0038] In an optional embodiment, the groove depth of a single water guide groove 12 at the downstream flow 1202 accounts for 10%-75% of the groove depth of the water guide groove 12 at the upstream flow 1201. In this way, the groove depth of the water guide groove 12 at the downstream flow 1202 is shallower than the upstream flow 1201 of the water guide groove 12, and the bottom surface of the water guide groove 12 can form a certain slope, which is conducive to guiding the flow of condensed water and facilitating the formation of a circulation space that decreases from the upstream flow 1201 of the water guide groove 12 toward the downstream flow 1202, thereby promoting the discharge of condensed water. In a specific embodiment, the groove depth of the water guide groove 12 at the downstream flow 1202 accounts for 10%, 50% or 75% of the groove depth of the water guide groove 12 at the upstream flow 1201.

[0039] In a further embodiment, the groove width of a single water guide groove 12 at the upstream 1201 of the flow accounts for 130%-170% of the groove width of the water guide groove 12 at the downstream 1202 of the flow. In this way, the groove width of the water guide groove 12 at the upstream 1201 of the flow is wider than that of the downstream 1202 of the flow, and the side wall of the water guide groove 12 can form a certain slope, which is conducive to guiding the flow of condensed water and facilitating the formation of a flow space that decreases from the upstream 1201 of the water guide groove 12 to the downstream 1202 of the flow, thereby promoting the discharge of condensed water. In a specific embodiment, the groove width of some water guide grooves 12 at the upstream 1201 of the flow accounts for 130%, 150% or 170% of the groove width of the water guide groove 12 at the downstream 1202 of the flow.

[0040] like Figures 1 to 3 As shown, the fin 10 has a first side 101 and a second side 102 along its thickness direction, and each water guide groove 12 is formed by being recessed from the first side 101 to the second side 102 along the thickness direction of the fin 10, and the notch of the water guide groove 12 faces the first side 101. The fin 10 defines a spacing groove 13 between any two adjacent water guide grooves 12 on the second side 102. In this way, the outer wall of the water guide groove 12 is convexly arranged on the surface of the fin 10 on the second side 102 to facilitate the formation of the spacing groove 13. The structure of the plurality of water guide grooves 12 and the structure of the plurality of spacing grooves 13 together form a corrugated hem extending along the x-axis direction (first direction) on both sides of the fin 10 along the y-axis direction (second direction), so that the fin 10 can disperse the force when subjected to external force, strengthen the structural strength of the fin 10, and make the fin 10 not easily deformed.

[0041] In some embodiments, the water guide groove 12 is set to a curved surface structure, and the bottom of the spacing groove 13 is a flat structure. Among them, the curved surface structure can reduce stress concentration and flow resistance, which is conducive to the flow of condensed water; the flat structure is simple to process and easy to form. In other embodiments, the water guide groove 12 and the spacing groove 13 can be set to a curved surface structure or a flat structure or other shape structure, as long as the water guide function of the water guide groove 12 is met.

[0042] Next, the arrangement of the mounting hole 11 will be described.

[0043] like Figure 1 and Figure 2 As shown, each mounting hole 11 is arranged at intervals; at least one of any two adjacent water guide grooves 12 is connected to at least one mounting hole 11, and the mounting hole 11 divides the corresponding water guide groove 12 into at least two water guide groove sections 121. In this way, since the mounting hole 11 is used to install the heat exchange tube 21, the arrangement of the water guide groove 12 being connected to the mounting hole 11 allows the condensed water at the position near the fin 10 on the heat exchange tube 21 to flow along the water guide groove 12, further reducing the retention of condensed water. In some embodiments, along the first direction and the second direction, multiple mounting holes 11 are arranged at intervals and staggered to facilitate the installation of the heat exchange tube 21.

[0044] like Figure 1 As shown, specifically, a plurality of mounting holes 11 are connected to a part of the number of water guide grooves 12, and the water guide groove 12 connected to the mounting hole 11 is completely disconnected into at least two water guide groove sections 121; the water guide groove 12 has spacing grooves 13 on both sides along its own groove width direction, and the sum of the groove width of two adjacent spacing grooves 13 at the mounting hole 11 and the groove width of the water guide groove 12 between the two at the mounting hole 11 is greater than the aperture size of the mounting hole 11, so part of the spacing groove 13 is also connected to the mounting hole 11, that is, the mounting hole 11 also divides the spacing groove 13 into at least two spacing groove sections 131, and along the axial direction of the spacing groove 13, there is also a connecting section 132 between two adjacent spacing groove sections 131 to connect the two.

[0045] In some embodiments, the fin 10 is further provided with spoiler holes 14 , which are described below.

[0046] like Figure 1 and Figure 2 As shown, in an optional embodiment, the bottom of each spacing groove 13 is set as a plane structure, and the spacing groove section 131 of at least a part of the spacing grooves 13 is configured with a spoiler hole 14, and the spoiler hole 14 penetrates the fin 10 along the thickness direction of the fin 10, and the spoiler hole 14 avoids the installation hole 11. In this way, setting the bottom of the spacing groove 13 as a plane is conducive to the processing of the spoiler hole 14. The setting of the spoiler hole 14, on the one hand, can make the condensed water flow along the surface of the fin 10 outside the spoiler hole 14 (that is, the bottom of the spacing groove 13) and the inner wall of the spoiler hole 14 when flowing through the spoiler hole 14, and the speed of the condensed water on the surface of the fin 10 outside the spoiler hole 14 and the wall of the spoiler hole 14 is inconsistent, thereby forming a vortex, so that the condensed water flows in a turbulent state, and the flow speed of the condensed water is accelerated. On the other hand, the setting of the spoiler hole 14 can also cause disturbances in the airflow flowing around the fin 10, which is conducive to breaking the airflow boundary layer and promoting heat exchange.

[0047] In one embodiment, along the width direction of the spacing groove 13, the minimum distance A between the edge of the spoiler hole 14 and the edge of the water channel 12 is 10%-25% of the groove width B of the spacing groove 13 at the corresponding position of the spoiler hole 14. Among them, the groove width B is the groove width of the spacing groove along its own groove width direction at the position where the minimum distance A is located. In this way, at the spoiler hole 14, the area of ​​the bottom of the spacing groove 13 through which the water flow can pass is small, and the water flow channel is narrow, which is conducive to increasing the water flow speed and accelerating drainage. In a specific embodiment, along the width direction of the spacing groove 13, the minimum distance A between the edge of the spoiler hole 14 and the edge of the water channel 12 accounts for 10%, 15% or 25% of the groove width of the spacing groove 13 at the corresponding position of the spoiler hole 14.

[0048] In a further embodiment, a plurality of spoiler holes 14 are provided, and the plurality of spoiler holes 14 are axially spaced apart from each other along the spacing groove 13 to enhance the spoiler effect.

[0049] In a further embodiment, along the axial direction of the spacing groove 13, the minimum distance C between the edge of the spoiler hole 14 and the edge of the mounting hole 11 accounts for 15%-25% of the length D of the spacing groove section 131 between any two adjacent mounting holes 11. At this time, the length D of the spacing groove section 131 is the minimum distance D between any two adjacent mounting holes 11 along the axial direction of the spacing groove 13. In this way, on the basis of ensuring the structural strength of the fin 10, the distance between the spoiler hole 14 and the mounting hole 11 can be shortened, which is conducive to changing the flow direction and flow rate of the fluid, so that the fluid forms turbulence and accelerates the discharge of condensed water. In a specific embodiment, along the axial direction of the spacing groove 13, the minimum distance C between the edge of the spoiler hole 14 and the edge of the mounting hole 11 accounts for 15%, 20% or 25% of the length D of the spacing groove section 131 between any two adjacent mounting holes 11.

[0050] In a further embodiment, along the axial direction of the spacing groove 13, the minimum distance E between the edge of the spoiler hole 14 and the edge of the fin 10 accounts for 20%-30% of the length F of the spacing groove section 131 located at the edge of the fin 10. At this time, the length F of the spacing groove section 131 is the minimum distance between the mounting hole 11 close to the edge of the fin 10 and the edge of the fin 10 along the axial direction of the spacing groove. In this way, the area where the spoiler hole 14 is set is defined, and as many spoiler holes 14 as possible can be set on the basis of ensuring the strength of the fin 10. In a specific embodiment, along the axial direction of the spacing groove 13, the minimum distance E between the spoiler hole 14 and the edge of the fin 10 accounts for 20%, 25% or 30% of the length F of the spacing groove section 131 located at the edge of the fin 10.

[0051] In an optional embodiment, the shape of the spoiler hole 14 can be set to a circular hole. The circular hole has a larger hole wall area, which slows down the flow rate of the condensed water and forms a larger speed difference and pressure difference with the condensed water outside the hole. In addition, the fluid flow direction in the spoiler hole 14 is inconsistent with the fluid flow direction outside the spoiler hole 14, so the condensed water can be promoted to form a vortex, that is, turbulence can be formed to promote the flow of condensed water.

[0052] In other embodiments, the shape of the spoiler hole 14 can also be set to a triangle, and the vertex angle of the triangle is set along the axial direction of the spacing groove 13 close to the upstream flow 1201, so that the condensed water first contacts the vertex angle of the triangle when flowing from the upstream flow 1201 to the downstream flow 1202, which makes the channel for fluid flow outside the spoiler hole 14 gradually decrease along the fluid flow direction, the fluid velocity gradually increases, and the pressure gradually decreases; and because the space inside the spoiler hole 14 gradually increases, the fluid velocity inside the spoiler hole 14 gradually decreases, the fluid pressure gradually increases, and the velocity difference and the pressure difference increase rapidly, respectively, which is conducive to the formation of more violent turbulence.

[0053] Of course, the shape of the spoiler hole 14 can also be set to an ellipse, the long axis of the ellipse is consistent with the width direction of the spacing groove 13, and the short axis of the ellipse is consistent with the axial direction of the spacing groove 13. In this way, more spoiler holes 14 can be set along the axial direction of the spacing groove 13 to enhance the spoiler effect. Along the axial direction of the spacing groove 13, the size of the spoiler hole 14 increases first and then decreases, so that the fluid channel outside the spoiler hole 14 decreases first and then increases. Similar to the above embodiment, the pressure of the fluid flow rate inside and outside the spoiler hole 14 is also different, and the condensed water forms turbulence. Among them, since the long axis of the ellipse is longer than the short axis, the channel outside the spoiler hole 14 where the long axis of the ellipse is located is very narrow, which is conducive to promoting more violent turbulence and promoting the discharge of condensed water. In other embodiments, the short axis of the ellipse can also be consistent with the width direction of the spacing groove 13, and the long axis can be consistent with the axial direction of the spacing groove 13, so that the length of the turbulent flow is longer, which is conducive to promoting the discharge of condensed water.

[0054] like Figure 4 As shown, the present application also provides a heat exchanger 100, including a heat exchange tube group 20, a water receiving tray and the above-mentioned fins 10; the heat exchange tube group 20 includes a plurality of connected heat exchange tubes 21, each heat exchange tube 21 passes through the mounting hole 11 of the fin 10; the water receiving tray is located below the heat exchange tube group 20 along the second direction, that is, the water receiving tray is close to the flow downstream 1202 of the water guide groove 12 of the fin 10, and is arranged away from the flow upstream 1201 of the water guide groove 12 of the fin 10.

[0055] In this way, the fin 10 is installed with the heat exchange tube 21 through the installation hole 11, and refrigerant flows in the heat exchange tube 21. The heat of the refrigerant is transferred to the fin 10 through the wall of the heat exchange tube 21, and the fin 10 then exchanges heat and transfers heat with the air. When the surface temperature of the fin 10 is lower than the dew point temperature of the surrounding air, water vapor will condense into condensed water on the surface of the fin 10. The fin 10 can make the condensed water flow along the water guide groove 12 through the setting of the water guide groove 12, and the downstream flow 1202 of the water guide groove 12 is set close to the water receiving tray, so that the condensed water flows from the upstream flow 1201 to the downstream flow 1202, and then flows from the downstream flow 1202 to the water receiving tray. The setting of the water receiving tray facilitates the collection and discharge of the condensed water from the heat exchanger 100.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A fin, characterized in that: The fin (10) is constructed as follows: A plurality of installation holes (11) arranged at intervals, each of the installation holes (11) being arranged to penetrate the fin (10) along the thickness direction of the fin (10); A plurality of water guide grooves (12) are arranged at intervals along a first direction of the fin (10); one end of a single water guide groove (12) along its own axial direction is defined as a flow upstream (1201), and the other end is defined as a flow downstream (1202); the groove depth and / or groove width of at least some of the water guide grooves (12) gradually decreases from the flow upstream (1201) toward the flow downstream (1202); some of the water guide grooves (12) are connected to the plurality of mounting holes (11), and another portion of the water guide grooves (12) are arranged at intervals from the plurality of mounting holes (11).

2. The fin according to claim 1, characterized in that: The depth of a single water guide groove (12) at the downstream (1202) of the flow accounts for 10%-75% of the depth of the water guide groove (12) at the upstream (1201) of the flow; and / or, The width of a single water guide groove (12) at the upstream (1201) of the flow accounts for 130%-170% of the width of the water guide groove (12) at the downstream (1202) of the flow.

3. The fin according to claim 1, characterized in that: The fin (10) has a first side (101) and a second side (102) along the thickness direction of the fin (10); each of the water guide grooves (12) is formed by being recessed from the first side (101) to the second side (102) along the thickness direction of the fin (10); a plurality of the water guide grooves (12) are each arranged to protrude from the second side (102); a spacing groove (13) is defined between any two adjacent water guide grooves (12); the plurality of water guide grooves (12) and the plurality of spacing grooves (13) form corrugated frills located on both sides of the fin (10) along the second direction.

4. The fin according to claim 3, characterized in that: At least one of any two adjacent water guide grooves (12) is in communication with at least one mounting hole (11), and the mounting hole (11) divides the corresponding water guide groove (12) into at least two water guide groove sections (121); the mounting hole (11) penetrates the corresponding water guide groove (12) and the spacing grooves (13) located on both sides of the water guide groove (12), and the mounting hole (11) divides the corresponding spacing groove (13) into at least two spacing groove sections (131).

5. The fin according to claim 4, characterized in that: At least a portion of the spacing grooves (13) are provided with spoiler holes (14) at their bottoms. The spoiler holes (14) are arranged along the thickness direction of the fin (10) and penetrate the spacing groove section (131). The spoiler holes (14) are arranged at intervals along the axial direction of the spacing groove (13).

6. The fin according to claim 5, characterized in that: Along the width direction of the spacing groove (13), the minimum distance between the edge of the spoiler hole (14) and the edge of the water guide groove (12) is A, which accounts for 10%-25% of the groove width B of the spacing groove (13) at the corresponding position of the spoiler hole (14).

7. The fin according to claim 5, characterized in that: Along the axial direction of the spacing groove (13), the minimum distance C between the edge of the spoiler hole (14) and the edge of the mounting hole (11) accounts for 5%-15% of the length D of the spacing groove section (131) between any two adjacent mounting holes (11); and / or, along the axial direction of the spacing groove (13), the minimum distance E between the edge of the spoiler hole (14) and the edge of the fin (10) accounts for 5%-15% of the length F of the spacing groove section (131) located at the edge of the fin (10).

8. The fin according to claim 5, characterized in that: The shape of the spoiler hole (14) is set to be elliptical, circular or triangular.

9. The fin according to claim 8, characterized in that: The spoiler hole (14) is in the shape of a triangle, and the vertex of the triangle is arranged along the axial direction of the spacing groove (13) close to the flow upstream (1201); or, The spoiler hole (14) is elliptical, the major axis of the ellipse is consistent with the width direction of the spacing groove (13), and the minor axis of the ellipse is consistent with the axial direction of the spacing groove (13); or, the major axis of the ellipse is consistent with the axial direction of the spacing groove (13), and the minor axis of the ellipse is consistent with the width direction of the spacing groove (13).

10. A heat exchanger, characterized in that: include: The fin (10) according to any one of claims 1 to 9; A heat exchange tube group (20) comprises a plurality of interconnected heat exchange tubes (21), each of the heat exchange tubes (21) passing through a mounting hole (11) of the fin (10); A water receiving tray is located below the heat exchange tube group (20) along the second direction.

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