Fin and heat exchanger

Abstract

The application relates to a fin and a heat exchanger, wherein the fin comprises a base plate, a tube hole is formed in the base plate and used for penetrating a refrigerant tube, the base plate has a windward side in the airflow direction; a windward plate is connected to the base plate and located on the windward side; a slit is formed in the base plate and located between the tube hole and the windward plate. The windward plate is preferentially contacted with the airflow, the slit between the tube hole and the windward plate can hinder the low temperature at the refrigerant tube from being transmitted to the windward plate area to a certain extent, thereby forming a relatively high temperature of the windward plate area, so that the wet airflow is not immediately frosted or cannot reach the frosting condition after being condensed on the windward plate, thereby generating more condensed water. After the condensed water is collected and does not frost, the condensed water is more easily flowed along the windward plate from top to bottom under the action of gravity, the condensed water on the windward plate is quickly gathered and flowed, and is not easy to form residual frost. The fin has the advantages of high condensed water discharge efficiency, high heat exchange efficiency and the like.

Description

Technical Field

[0001] The present application belongs to the field of heat exchange technology, and specifically relates to fins and heat exchangers. Background Art

[0002] Fin-and-tube heat exchangers are widely used in the heat exchange field. Commonly used fin-and-tube heat exchangers are primarily composed of refrigerant tubes and fins. Refrigerant circulates inside the tubes for heat exchange, while the fins are located outside the tubes, enhancing heat exchange between the air and the refrigerant. 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, affecting the heat exchange efficiency of the heat exchanger.

[0003] Therefore, how to delay the frosting process on the fin surface to improve the continuous heat exchange capacity of the heat exchanger is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The present application provides fins and a heat exchanger to solve the technical problem of delaying frost formation on the fin surface.

[0005] In order to solve the above technical problems, a technical solution adopted in this application is: a fin, which includes: a base plate, a tube hole is opened on the base plate for passing the refrigerant tube, and the base plate has a windward side in the direction of air flow; a windward plate, connected to the base plate and located on the windward side; wherein, a slit is opened on the base plate, and the slit is located between the tube hole and the windward plate.

[0006] According to one embodiment of the present application, the substrate has a first heat exchange surface and a second heat exchange surface arranged opposite to each other, and the substrate is formed with a water guide portion located on the first heat exchange surface and / or the second heat exchange surface to guide water on the substrate to the windward plate.

[0007] According to one embodiment of the present application, the substrate is provided with a plurality of the tube holes spaced apart along the height direction, and the water guide portion is provided between each two adjacent tube holes.

[0008] According to one embodiment of the present application, the slits are arranged in a one-to-one correspondence with the tube holes, and the slits extend from the lower edge of the water guide portion above the corresponding tube hole to the upper edge of the water guide portion below the tube hole.

[0009] According to one embodiment of the present application, the slits are arranged in a one-to-one correspondence with the tube holes, and the slits extend from the lower edge of the water guide portion above the corresponding tube hole to the upper edge of the water guide portion below the tube hole.

[0010] According to one embodiment of the present application, the water guide portion includes at least one water guide ridge, and the substrate also has a leeward side in the direction of airflow. The water guide ridge extends from the leeward side of the substrate to the windward side, and the height of the water guide ridge gradually decreases from the leeward side to the windward side.

[0011] According to one embodiment of the present application, the water-guiding ridge extends in a most rapid curve from an end close to the leeward side to an end close to the windward side.

[0012] According to one embodiment of the present application, one end of the water-guiding protrusion close to the leeward side is higher than or flush with the lower edge of the upper pipe hole.

[0013] According to one embodiment of the present application, the width of the slit is less than or equal to 0.2 mm.

[0014] According to one embodiment of the present application, the substrate is formed with the water guide portion respectively located on the first heat exchange surface and the second heat exchange surface; the windward plate is bent to form a first drainage groove extending along its height direction, the first drainage groove and the first heat exchange surface are located on the same side, the connection between the windward plate and the substrate is inclined relative to the substrate, the windward plate and the substrate are surrounded to form a second drainage groove extending along its height direction, the second drainage groove and the second heat exchange surface are located on the same side.

[0015] According to one embodiment of the present application, a height of the windward plate perpendicular to the second heat exchange surface is smaller than a height of the water guide portion perpendicular to the second heat exchange surface.

[0016] In order to solve the above technical problems, another technical solution adopted in this application is: a heat exchanger, including a refrigerant tube and a fin group, the fin group includes a plurality of the above fins arranged at intervals, and the refrigerant tube is passed through the tube hole.

[0017] According to one embodiment of the present application, the height of the water guide portion protruding from the base plate is less than or equal to half of the distance between two adjacent fins.

[0018] The beneficial effects of the present application are as follows: the fins in the present application include a windward plate and a base plate. Since the windward plate is located on the windward side of the base plate, the windward plate is in contact with the airflow first, and condensed water is more likely to condense on the windward plate. The slit between the tube hole and the windward plate can, to a certain extent, hinder the low temperature at the refrigerant tube from being transferred to the windward plate area, thereby forming a relatively high temperature in the windward plate area, so that the moist air flow does not immediately frost after condensing on the windward plate or does not meet the frost conditions (the frost conditions are that the moist air condenses and the temperature is continuously below the freezing point), thereby generating more condensed water. After the condensed water is gathered and does not frost, it is easier to flow from top to bottom along the windward plate under the action of gravity. The condensed water on the windward plate gathers quickly and flows quickly, and is not easy to form residual frost. The discharged condensed water continuously takes away the cold, further maintaining the relatively high temperature in the windward plate area, so that the moisture in the airflow can be effectively condensed on the windward plate, but the frost conditions are not met, so that the windward plate intercepts most of the moisture, and the condensed water condensed on the base plate is reduced. The fins have high efficiency in discharging condensed water, are not prone to frost, and have high heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of a fin of the present application;

[0021] Figure 2 1 is a schematic diagram of the front structure and a schematic diagram of the back structure of an embodiment of the fin of the present application;

[0022] Figure 3 This is a schematic top view of the structure of a fin embodiment of the present application;

[0023] Figure 4 It is a three-dimensional structural diagram of an embodiment of the heat exchanger of the present application. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, 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. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0027] Fin-tube heat exchangers are widely used in the heat exchange field. Commonly used fin-tube heat exchangers are primarily composed of refrigerant tubes and fins. Refrigerant circulates inside the tubes for heat exchange, while the fins are located outside the tubes, enhancing heat exchange between the air and the refrigerant. When outdoor air is cold and humid (e.g., 2°C and 80% humidity), 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, affecting the heat exchange efficiency of the heat exchanger.

[0028] The fins are divided into the front, middle, and rear regions based on the airflow direction. Because the refrigerant temperature within the refrigerant tubes is lower than the ambient air temperature of the heat exchanger, the fins are also lower than the ambient temperature, allowing condensation or frost to form across the entire fin area. However, the inventors of this application have discovered through extensive research that, in practice, humid air continuously condenses as air flows from the front to the rear of the tubes, resulting in the majority of condensation concentrating in the front region.

[0029] See also Figure 1 , Figure 1 It is a three-dimensional structural diagram of an embodiment of the fin of the present application.

[0030] Therefore, an embodiment of the present application provides a fin 100. The fin 100 includes a base plate 110 and a windward plate 120. The base plate 110 is provided with a tube hole 113 for passing a refrigerant tube 210 (see FIG. Figure 4 The base plate 110 has a windward side 101 in the direction of airflow. The windward plate 120 is connected to the base plate 110 and is located on the windward side 101 of the base plate 110. A slit 130 is formed in the base plate 110. The slit 130 is located between the tube hole 113 and the windward plate 120.

[0031] Since the windward plate 120 is located on the windward side 101 of the base plate 110, the windward plate 120 is in contact with the airflow first, and condensation water is more likely to condense on the windward plate 120. The slit 130 located between the pipe hole 113 and the windward plate 120 can, to a certain extent, hinder the low temperature at the refrigerant pipe 210 from being transmitted to the windward plate 120 area, thereby forming a relatively high temperature in the windward plate 120 area, so that the wet air flow does not immediately frost after condensing on the windward plate 120 or does not meet the frost conditions (the frost conditions are that the wet air condenses and the temperature continues to be below the freezing point), thereby generating more condensation water. After the condensation water gathers and does not frost, it is easier to flow from top to bottom along the windward plate 120 under the action of gravity. The condensation water on the windward plate 120 gathers quickly and flows quickly, and is not easy to form residual frost. The drained condensed water continuously removes cold energy, further maintaining a relatively high temperature in the area of ​​windward plate 120. This allows the windward plate 120 to effectively condense moisture in the airflow without creating conditions for frost formation. Consequently, windward plate 120 intercepts most of the moisture, reducing the amount of condensed water condensing on base plate 110. Fins 100 overall improve condensed water drainage efficiency, offering advantages such as low frost resistance and high heat exchange efficiency.

[0032] In some embodiments, the width of the slit 130 is less than or equal to 0.2 mm. Within this range, the width of the slit 130 is appropriate, neither too narrow to affect its effect of slowing down the transfer of cold energy, nor too wide to excessively affect the heat exchange area of ​​the base plate 110, so that the windward plate 120 can effectively condense the moisture in the airflow without creating a frosting condition. Thus, the windward plate 120 can intercept most of the moisture, thereby improving the overall condensate discharge efficiency of the fin 100. The fin 100 as a whole has the advantages of being less prone to frosting and having high heat exchange efficiency, and is conducive to maintaining the heat exchanger 200 (see Figure 4 ) The ability to continuously exchange heat in a low temperature and high humidity environment.

[0033] Specifically, the width of the slit 130 is 0.5 mm, 1 mm, 1.2 mm, 1.6 mm, or 2 mm.

[0034] Specifically, the shape of the slit 130 can be a straight line, a broken line, an arc line, or a wavy line, which can be determined according to the actual arrangement requirements of the substrate 110 and the process conditions.

[0035] Please continue reading Figure 2 and Figure 3 , Figure 2 1 is a schematic diagram of the front structure and the back structure of an embodiment of the fin of the present application, wherein the left (A) is a schematic diagram of the front structure of the fin, and the right (B) is a schematic diagram of the back structure of the fin; Figure 3: This is a schematic diagram of the top view of the structure of an embodiment of the fin of the present application. In order to further delay the frosting process on the surface of the fin 100, in some embodiments, the substrate 110 has a first heat exchange surface 111 and a second heat exchange surface 112 arranged opposite to each other. The substrate 110 is formed with a water guide 140 located on the first heat exchange surface 111 and / or the second heat exchange surface 112 to guide the water on the substrate 110 to the windward plate 120. By providing the water guide 140 on the first heat exchange surface 111 and / or the second heat exchange surface 112 of the substrate 110, the condensed water condensed on the first heat exchange surface 111 and / or the second heat exchange surface 112 can be further gathered and drained to the windward plate 120, thereby accelerating the discharge of the condensed water on the surface of the substrate 110 and preventing the surface of the substrate 110 from frosting. In addition, the gathering and flow discharge speed of the condensed water on the windward plate 120 is further improved, and the fin 100 as a whole improves the condensed water discharge efficiency, and has the advantages of being less prone to frosting and having high heat exchange efficiency.

[0036] It should be noted that the substrate 110 is plate-shaped as a whole, and the heat exchange surface refers to the main plane of the substrate 110 that is mainly used for heat exchange with the airflow, and the two heat exchange surfaces are adjacent to the windward side 101.

[0037] Specifically, the substrate 110 may only have the water guide 140 formed on the first heat exchange surface 111 or the second heat exchange surface 112. Of course, the substrate 110 may also have the water guide 140 formed on both the first heat exchange surface 111 and the second heat exchange surface 112. The water guide 140 located on the first heat exchange surface 111 can direct condensed water condensed on the first heat exchange surface 111 to the windward plate 120, while the water guide 140 located on the second heat exchange surface 112 can direct condensed water condensed on the second heat exchange surface 112 to the windward plate 120. Condensed water on both the first and second heat exchange surfaces 111, 112 of the substrate 110 can be promptly collected and discharged, delaying or even preventing the formation of condensed water and improving the overall heat exchange efficiency of the fin 100.

[0038] In some embodiments, when the fins 100 are in use, the base plate 110 is positioned vertically. Specifically, the base plate 110 can be vertically positioned or tilted at a certain angle relative to the vertical. In this case, the base plate 110 and the windward plate 120 extend vertically, allowing condensed water to flow more easily along the windward plate 120 and base plate 110 under the action of gravity and drain out at the bottom.

[0039] The base plate 110 is provided with a plurality of tube holes 113 spaced apart along its height. Each tube hole 113 allows a refrigerant tube 210 to pass through. Because the refrigerant tubes 210 are relatively low in temperature, a water guide 140 is provided between each pair of adjacent tube holes 113 to improve the collection and drainage efficiency of condensed water on the base plate 110.

[0040] It should be noted that the height direction of the substrate 110 refers to the direction along which it extends vertically. When the substrate 110 is placed vertically, the height direction of the substrate 110 is the vertical direction. In addition, when there is space between the substrate 110 above the topmost tube hole 113 and the substrate 110 below the bottommost tube hole 113, a water guide 140 can also be provided to guide condensed water on the substrate 110 to the windward plate 120.

[0041] In some embodiments, the water guide portion 140 includes at least one water guide rib 141. The substrate 110 further has a leeward side 102 in the direction of airflow. The water guide rib 141 extends from the leeward side 102 of the substrate 110 to the windward side 101, and the height of the water guide rib 141 gradually decreases from the leeward side 102 to the windward side 101. On the one hand, the water guide rib 141 has a long extension and a wide coverage area. The water guide rib 141 can extend from the leeward side 102 of the substrate 110 to the windward side 101 of the substrate 110, effectively guiding the discharge of condensed water on the substrate 110. The water guide rib 141 also increases the contact area between the substrate 110 and the airflow, thereby fully condensing the condensed water in the airflow. On the other hand, the downward inclination of the water guide rib 141 facilitates the formation of a drainage channel. Condensed water condensed on the surface of the substrate 110 flows to the water guide rib 141 under the action of gravity, where the condensed water forms a collection. Under the combined effects of gravity and surface tension, the condensed water accumulated on the water-guiding ridges 141 is accelerated along the water-guiding ridges 141 to flow toward the windward plate 120. This not only increases the rate at which the condensed water on the base plate 110 is drained, but also increases the amount of condensed water accumulated on the windward plate 120, further improving the efficiency of condensed water drainage from the windward plate 120. Therefore, the fin 100 as a whole improves the efficiency of condensed water drainage, reduces condensed water residue, and has the advantages of being less prone to frosting and having high heat exchange efficiency.

[0042] Specifically, the water guide portion 140 includes one, two, or more water guide ridges 141. The number of the water guide ridges 141 can be determined according to actual conditions such as the size of the space between adjacent tube holes 113.

[0043] Specifically, to ensure that water-guiding ridges 141 fully cover substrate 110, the end of water-guiding ridges 141 near the leeward side 102 is higher than or flush with the lower edge of the upper tube hole 113. Consequently, water-guiding ridges 141 extend a long distance in the height direction of substrate 110, covering a wide area. This allows drainage channels to be formed starting from the tube hole 113 at the leeward side 102 of substrate 110, further improving the efficiency of draining condensed water from substrate 110.

[0044] In other embodiments, the water guide portion 140 may also have other structures. For example, the water guide portion 140 may be a water guide film layer extending from the leeward side 102 to the windward side 101 to guide the condensed water on the substrate 110 to the windward plate 120; or, the water guide portion 140 may also be a plurality of water guide protrusions arranged at intervals to guide the condensed water to the windward plate 120, which are not listed here.

[0045] Furthermore, the water-guiding ridges 141 can extend from the end near the leeward side 102 to the end near the windward side 101 in a straight line, a broken line, a wavy line, or an arc. Specifically, the water-guiding ridges 141 extend from the end near the leeward side 102 to the end near the windward side 101 in a most rapid curve. When the water-guiding ridges 141 are in a most rapid curve, condensed water flows along the water-guiding ridges 141 to the windward plate 120 at a faster rate, thereby increasing the rate at which condensed water is drained from the base plate 110 and reducing the amount of condensed water remaining on the base plate 110.

[0046] In some embodiments, the first heat exchange surface 111 and the second heat exchange surface 112 of the substrate 110 are each provided with a water guide 140. A water guide 140 is provided between each two adjacent tube holes 113. Each water guide 140 includes a water guide rib 141.

[0047] The water-guiding ridges 141 can be formed by outward protrusions of the substrate 110, that is, the water-guiding ridges 141 on the first heat exchange surface 111 will form corresponding recessed grooves on the second heat exchange surface 112, and the water-guiding ridges 141 on the second heat exchange surface 112 will form corresponding recessed grooves on the first heat exchange surface 111. Therefore, in order to avoid each other, the water-guiding ridges 141 on the first heat exchange surface 111 and the water-guiding ridges 141 on the second heat exchange surface 112 are staggered in height. Forming the water-guiding ridges 141 in this manner not only guides the flow of condensed water, but also increases the heat exchange area by forming recessed grooves on the other side, increases the disturbance of the airflow, improves heat exchange efficiency, saves materials and costs, and reduces the weight of the fin 100.

[0048] In other embodiments, a structure may be attached to the surface of the substrate 110 to form water-guiding ridges 141, that is, the area of ​​the substrate 110 where the water-guiding ridges 141 are formed will not be convex on one side and concave on the other side. At this time, the water-guiding ridges 141 of the first heat exchange surface 111 and the second heat exchange surface 112 can be symmetrically arranged or staggered in height, and there is no limitation here.

[0049] Furthermore, the slits 130 are arranged in a one-to-one correspondence with the tube holes 113, and the slits 130 extend from the lower edge of the water guide portion 140 above the corresponding tube hole 113 to the upper edge of the water guide portion 140 below the corresponding tube hole 113. At this time, the covering length of the slits 130 is sufficient to effectively form a cold barrier between the refrigerant pipe 210 and the windward plate 120, slowing down the transfer of cold to the windward plate 120, thereby improving the efficiency of condensed water collection and discharge on the windward plate 120.

[0050] Specifically, the end of the slit 130 near the upper water-guiding rib 141 extends to the end of the water-guiding rib 141 near the windward plate 120, and the end of the slit 130 near the lower water-guiding rib 141 extends to the middle of the water-guiding rib 141. In this case, the length of the slit 130 is sufficiently long to effectively slow down the transfer of cooling energy from the refrigerant pipe 210 in the pipe hole 113 to the windward plate 120.

[0051] In some embodiments, the base plate 110 is formed with a water guide portion 140 located on the first heat exchange surface 111 and the second heat exchange surface 112, respectively. The windward plate 120 is bent to form a first drainage groove 121 extending along its height direction, and the first drainage groove 121 is located on the same side as the first heat exchange surface 111. Condensed water condensed on the side of the windward plate 120 on the same side as the first drainage groove 121 can be gathered in the first drainage groove 121, and the condensed water condensed on the first heat exchange surface 111 can flow along the water guide portion 140 to the first drainage groove 121. Since the first drainage groove 121 extends along the height direction of the windward plate 120, the condensed water in the first drainage groove 121 gathers and flows from top to bottom. The condensed water flows quickly, has high discharge efficiency, and is less likely to form residue, thereby delaying frosting of the fins 100.

[0052] At the same time, the connection between the curved windward plate 120 and the base plate 110 is tilted relative to the base plate 110. The windward plate 120 and the base plate 110 surround a second drainage groove 122 extending along their height. The second drainage groove 122 is located on the same side as the second heat exchange surface 112. Condensed water condensed on the second heat exchange surface 112 can flow along the water guide 140 to the second drainage groove 122. Because the second drainage groove 122 extends along the height of the windward plate 120, the condensed water in the second drainage groove 122 gathers and flows from top to bottom. This results in a fast condensed water flow rate, high drainage efficiency, and less chance of residual water forming, thereby delaying the formation of frost on the fins 100.

[0053] In order to reduce the wind resistance of the airflow, the height of the windward plate 120 perpendicular to the second heat exchange surface 112 is less than the height of the water guide 140 perpendicular to the second heat exchange surface 112, thereby reducing the resistance of the airflow through the windward plate 120 and improving the airflow efficiency.

[0054] The windward plate 120, slit 130 and water guide 140 of the fin 100 of the present application cooperate with each other, which is conducive to forming a relatively high-temperature area in the windward plate 120 area of ​​the fin 100 and effectively condensing condensed water. It can also guide the condensed water in the base plate 110 area to gather in the windward plate 120 area, effectively strengthening the flow of condensed water after the wet air condenses on the surface of the fin 100, thereby accelerating the condensed water to separate from the surface of the fin 100, and extending the frosting process on the surface of the fin 100, which is conducive to maintaining the ability of the heat exchanger 200 using the fin 100 to continuously exchange heat in a low-temperature and high-humidity environment.

[0055] Please continue reading Figure 4 , Figure 4 It is a three-dimensional structural diagram of an embodiment of the heat exchanger of the present application.

[0056] Another embodiment of the present application provides a heat exchanger 200. The heat exchanger 200 includes a refrigerant tube 210 and a fin group 220. The fin group 220 includes a plurality of fins 100 arranged at intervals. The fin 100 adopts the fin 100 in any of the above-mentioned embodiments. The fin group 220 can increase the heat exchange area between the refrigerant tube 210 and the airflow, thereby improving the heat exchange efficiency of the heat exchanger 200. The fin 100 includes a base plate 110 and a windward plate 120. A tube hole 113 is provided on the base plate 110, and the refrigerant tube 210 is passed through the tube hole 113. The base plate 110 has a windward side 101 in the direction of airflow. The windward plate 120 is connected to the base plate 110 and is located on the windward side 101 of the base plate 110. A slit 130 is provided on the base plate 110. The slit 130 is located between the tube hole 113 and the windward plate 120.

[0057] Since the windward plate 120 is located on the windward side 101 of the base plate 110, the windward plate 120 is in contact with the airflow first, and condensation water is more likely to condense on the windward plate 120. The slit 130 located between the pipe hole 113 and the windward plate 120 can, to a certain extent, hinder the low temperature at the refrigerant pipe 210 from being transmitted to the windward plate 120 area, thereby forming a relatively high temperature in the windward plate 120 area, so that the wet air flow does not immediately frost after condensing on the windward plate 120 or does not meet the frost conditions (the frost conditions are that the wet air condenses and the temperature continues to be below the freezing point), thereby generating more condensation water. After the condensation water gathers and does not frost, it is easier to flow from top to bottom along the windward plate 120 under the action of gravity. The condensation water on the windward plate 120 gathers quickly and flows quickly, and is not easy to form residual frost. The drained condensed water continuously removes cold energy, further maintaining a relatively high temperature in the area of ​​windward plate 120. This allows the windward plate 120 to effectively condense moisture in the airflow without creating frost. Consequently, windward plate 120 intercepts most of the moisture, reducing the amount of condensed water condensing on base plate 110. Fins 100 overall improve condensed water drainage efficiency, offering advantages such as low frost resistance and high heat exchange efficiency. This improves the overall heat exchange efficiency of heat exchanger 200 and maintains its ability to continuously exchange heat in low-temperature, high-humidity environments.

[0058] In some embodiments, the height of the water guide 140 protruding from the base plate 110 is less than or equal to half the distance between two adjacent fins 100. The water guide 140 protruding from the base plate 110 at an appropriate height can maximize the collection of condensed water while preventing excessive resistance to airflow, thereby improving the overall heat exchange efficiency of the heat exchanger 200.

[0059] Specifically, the height of the water guide portion 140 protruding from the base plate 110 may be half, one-third, or one-quarter of the distance between two adjacent fins 100 , etc., which is not limited here.

[0060] It should be noted that terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or vertical, but rather that they may be slightly tilted. Terms such as "parallel" and "perpendicular" do not imply that components are absolutely parallel or perpendicular to each other, but rather that they may form a certain angular deviation. For example, "horizontal" simply means that its direction is more horizontal than "vertical" and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted. Furthermore, terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships typically used when the products of this application are used. These terms are intended solely to facilitate the description of the embodiments of this application and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] It should be understood that "plurality" herein means at least two, such as two, three, etc., unless otherwise specified. Furthermore, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. The term "and / or" merely describes an association between associated objects, indicating that three possible relationships exist. For example, "A and / or B" could mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " herein generally indicates an "or" relationship between the associated objects.

[0062] The above description 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, characterized in that: The fin comprises: A base plate, wherein a plurality of tube holes are provided on the base plate at intervals along the height direction for passing refrigerant tubes, and the base plate has a windward side in the direction of airflow; a windward plate connected to the base plate and located on the windward side; Wherein, a slit is provided on the base plate, and the slit is located between the tube hole and the windward plate; The substrate has a first heat exchange surface and a second heat exchange surface arranged opposite to each other. The substrate is formed with water guides located on the first heat exchange surface and the second heat exchange surface to guide water on the substrate to the windward plate. The water guide is respectively provided between each two adjacent tube holes. The water guide includes at least one water guide ridge. The water guide ridge of the first heat exchange surface forms a concave groove corresponding to the second heat exchange surface, and the water guide ridge of the second heat exchange surface forms a concave groove corresponding to the first heat exchange surface. The slits are arranged in one-to-one correspondence with the tube holes, and the slits extend from the lower edge of the water guide portion above the corresponding tube hole to the upper edge of the water guide portion below the tube hole.

2. The fin according to claim 1, characterized in that The substrate further has a leeward side in the airflow direction, the water guide ridges extend from the leeward side of the substrate to the windward side, and the height of the water guide ridges gradually decreases from the leeward side to the windward side.

3. The fin according to claim 2, characterized in that The water-guiding convex strip extends in a most rapid curve from an end close to the leeward side to an end close to the windward side.

4. The fin according to claim 2, characterized in that One end of the water-guiding convex strip close to the leeward side is higher than or flush with the lower edge of the upper pipe hole.

5. The fin according to any one of claims 1 to 4, characterized in that: The width of the slit is less than or equal to 0.2 mm.

6. The fin according to claim 1, characterized in that The substrate is formed with the water guide portion located on the first heat exchange surface and the second heat exchange surface respectively; the windward plate is bent to form a first drainage groove extending along its height direction, the first drainage groove and the first heat exchange surface are located on the same side, the connection between the windward plate and the substrate is inclined relative to the substrate, the windward plate and the substrate are surrounded to form a second drainage groove extending along its height direction, the second drainage groove and the second heat exchange surface are located on the same side.

7. The fin according to claim 6, characterized in that The height of the windward plate perpendicular to the second heat exchange surface is smaller than the height of the water guide portion perpendicular to the second heat exchange surface.

8. A heat exchanger, characterized in that: The invention comprises a refrigerant tube and a fin group, wherein the fin group comprises a plurality of fins as described in any one of claims 1 to 7 that are arranged at intervals, and the refrigerant tube is passed through the tube hole.

9. The heat exchanger according to claim 8, characterized in that The height of the water guide portion protruding from the base plate is less than or equal to half of the distance between two adjacent fins.

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