Fin and heat exchanger

Abstract

The invention relates to a fin and a heat exchanger, and the fin comprises a base plate, the base plate is provided with a pipe hole used for allowing a refrigerant pipe to penetrate through, and the base plate is provided with a windward side in the airflow flowing direction; the windward plate is connected with the base plate and located on the windward side; wherein a slit is formed in the base plate, and the slit is located between the pipe hole and the windward plate. The windward plate is in contact with airflow preferentially, and the slits between the pipe holes and the windward plate can prevent low temperature at the refrigerant pipe from being transmitted to the windward plate area to a certain extent, so that relative high temperature of the windward plate area is formed, wet airflow does not immediately frost or cannot reach the frosting condition after being condensed on the windward plate, and more condensate water is generated. After the condensed water is collected and does not frost, the condensed water can flow from top to bottom along the windward plate under the action of gravity, the condensed water on the windward plate is fast in collection and flowing speed, and the condensed water is not prone to frosting after being left. The fin has the advantages of being high in overall condensate water discharge efficiency, not prone to frosting and high in heat exchange efficiency.

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-tube heat exchangers are widely used in the field of heat exchange. Commonly used fin-tube heat exchangers are mainly composed of refrigerant tubes and fins. Refrigerant flows inside the refrigerant tubes for heat exchange, and the fins are located on the outside of the refrigerant tubes to enhance the heat exchange between air and refrigerant. Water vapor in the air is easily condensed on the heat exchanger to form condensed water. If the temperature of the heat exchanger is lower than the freezing point of water, this part of the condensed water will further condense into frost or ice, thereby 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 a fin and a heat exchanger to solve the technical problem of delaying frosting on the fin surface.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: a fin, the fin comprising: a base plate, the base plate is provided with a tube hole for passing the refrigerant tube, the base plate has a windward side in the airflow direction; 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.

[0006] According to one embodiment of the present application, the substrate has a first heat exchange surface and a second heat exchange surface that are 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 an embodiment of the present application, the substrate is provided with a plurality of the tube holes spaced apart along a height direction, and the water guide portion is provided between each two adjacent tube holes.

[0008] According to an embodiment of the present application, 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.

[0009] According to an embodiment of the present application, 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.

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

[0011] According to an embodiment of the present application, the water-guiding convex strip extends in a fastest curve from an end close to the leeward side to an end close to the windward side.

[0012] According to an embodiment of the present application, 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.

[0013] According to an 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 guiding 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 guiding portion perpendicular to the second heat exchange surface.

[0016] In order to solve the above technical problems, another technical solution adopted in the present 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 inserted into the tube hole.

[0017] According to an 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 preferentially in contact with the airflow, 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 transmitted to the windward plate area, thereby forming a relatively high temperature in the windward plate area, so that the humid air flow does not immediately frost or does not meet the frost conditions after condensing on the windward plate (the frost conditions are that the humid 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 it 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 overall fin has high condensate discharge efficiency, is not prone to frost, and has 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 drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

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

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

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

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

[0024] 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. It is to 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 structures related to the present application are shown in the accompanying drawings, rather than all structures. 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] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood 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 as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0027] Fin-tube heat exchangers are widely used in the field of heat exchange. Commonly used fin-tube heat exchangers are mainly composed of refrigerant tubes and fins. Refrigerant flows inside the refrigerant tubes for heat exchange, and the fins are located on the outside of the refrigerant tubes to enhance the heat exchange between air and refrigerant. When the outdoor air is low in temperature and high in humidity (such as air temperature of 2°C and air humidity of 80%), water vapor in the air is easily condensed on the heat exchanger to form condensed water. If the temperature of the heat exchanger is lower than the freezing point of water, this part of the condensed water will further condense into frost or ice, thereby affecting the heat exchange efficiency of the heat exchanger.

[0028] The fins are divided into the front area, the middle area and the rear area according to the airflow direction. Since the refrigerant temperature in the refrigerant tube is lower than the ambient air temperature of the heat exchanger, the fins are also lower than the ambient temperature, and condensation or frost can form in the entire fin area. However, the inventors of this application have found through long-term research that in actual processes, when the airflow flows from the front area to the rear area, the humid air continues to condense, so most of the condensation is concentrated in the front area.

[0029] See also Figure 1 , Figure 1 It is a three-dimensional structural diagram of an embodiment of a 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 Figure 4 The substrate 110 has a windward side 101 in the airflow direction. The windward plate 120 is connected to the substrate 110 and is located on the windward side 101 of the substrate 110. A slit 130 is provided on the substrate 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 preferentially in contact with the airflow, and condensed water is more likely to condense on the windward plate 120. The slit 130 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 transmitting to the windward plate 120 area, thereby forming a relatively high temperature in the windward plate 120 area, so that the humid air flow does not frost immediately after condensing on the windward plate 120 or does not meet the frost conditions (the frost conditions are that the humid air condenses and the temperature continues to be 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 120 under the action of gravity. The condensed water on the windward plate 120 gathers quickly and flows quickly, and it 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 120 area, so that the moisture in the airflow can be effectively condensed on the windward plate 120, but the frosting condition is not met, so that the windward plate 120 intercepts most of the moisture, and the condensed water condensed on the base plate 110 is reduced. The fin 100 improves the discharge efficiency of the condensed water as a whole, and has the advantages of not easy to frost 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 substrate 110, so that the windward plate 120 can effectively condense the moisture in the airflow, but does not meet the frosting conditions, so that the windward plate 120 can intercept most of the moisture, improve the overall condensation water discharge efficiency of the fin 100, and the fin 100 as a whole has the advantages of not being easy to frost and 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 may be a straight line, a folded line, an arc line, or a wavy line, which may be determined according to the actual setting 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 a schematic diagram of the back structure of a fin of the present application, wherein (A) on the left is a schematic diagram of the front structure of the fin, and (B) on the right is a schematic diagram of the back structure of the fin; Figure 31 is a schematic diagram of a top view of a fin embodiment 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, avoiding the frost on the surface of the substrate 110, and the condensed water on the windward plate 120 is further increased. The fin 100 improves the discharge efficiency of the condensed water as a whole, and has the advantages of not easy to frost and high heat exchange efficiency.

[0036] It should be noted that the substrate 110 is in a plate shape 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 form the water guide 140 on the first heat exchange surface 111 or the second heat exchange surface 112. Of course, the substrate 110 may also form the water guide 140 on the first heat exchange surface 111 and the second heat exchange surface 112 respectively. The water guide 140 located on the first heat exchange surface 111 can guide the condensed water condensed on the first heat exchange surface 111 to the windward plate 120, and the water guide 140 located on the second heat exchange surface 112 can guide the condensed water condensed on the second heat exchange surface 112 to the windward plate 120. The condensed water on the first heat exchange surface 111 and the second heat exchange surface 112 of the substrate 110 can be gathered and discharged in time, delaying or even avoiding the frosting of the condensed water, thereby improving the overall heat exchange efficiency of the fin 100.

[0038] In some embodiments, when the fin 100 is in use, the base plate 110 is placed vertically. Specifically, the base plate 110 can be arranged vertically, or in a non-horizontal state with a certain angle relative to the vertical direction. At this time, the base plate 110 and the windward plate 120 extend vertically, and the condensed water is more likely to flow along the windward plate 120 and the base plate 110 under the action of gravity and be discharged at the bottom.

[0039] The base plate 110 is provided with a plurality of tube holes 113 spaced apart in the height direction. Each tube hole 113 can be respectively passed through by a refrigerant tube 210. Since the temperature of the refrigerant tube 210 is relatively low, a water guide 140 is respectively provided between each two adjacent tube holes 113, which can improve the gathering and discharge efficiency of the condensed water on the base plate 110.

[0040] It should be noted that the height direction of the substrate 110 refers to the direction extending vertically thereof. 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 may also be provided to guide the 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 ridge 141, and the substrate 110 further has a leeward side 102 in the direction of airflow. The water guide ridge 141 extends from the leeward side 102 of the substrate 110 to the windward side 101, and the height of the water guide ridge 141 gradually decreases from the leeward side 102 to the windward side 101. On the one hand, the water guide ridge 141 has a long extension length and a wide coverage area. The water guide ridge 141 can extend from the leeward side 102 of the substrate 110 to the windward side 101 of the substrate 110, which can fully guide the condensed water on the substrate 110 to be discharged, and the water guide ridge 141 can increase the contact area between the substrate 110 and the airflow to fully condense the condensed water in the airflow; on the other hand, the water guide ridge 141 forms a downward tilting trend, which is conducive to forming a drainage channel. The condensed water condensed on the surface of the substrate 110 flows to the water guide ridge 141 under the action of gravity, and the condensed water forms agglomeration. The condensed water gathered on the water-guiding convex strips 141 is accelerated to flow to the windward plate 120 along the water-guiding convex strips 141 under the combined effect of gravity and surface tension, which not only improves the discharge speed of the condensed water on the base plate 110, but also increases the amount of condensed water gathered on the windward plate 120, further improving the condensed water discharge efficiency on the windward plate 120. Therefore, the fin 100 improves the discharge efficiency of the condensed water as a whole, reduces the residual condensed water, and has the advantages of being not easy to frost and having high heat exchange efficiency.

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

[0043] Specifically, in order to make the water-guiding convex strip 141 fully cover the substrate 110, the end of the water-guiding convex strip 141 close to the leeward side 102 is higher than or flush with the lower edge of the upper tube hole 113. Therefore, the water-guiding convex strip 141 extends a long distance in the height direction of the substrate 110 and covers a wide area. A drainage channel can be formed starting from the tube hole 113 at the substrate 110 close to the leeward side 102, further improving the efficiency of condensed water discharge on the substrate 110.

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

[0045] In addition, the water-guiding convex strip 141 can extend from one end close to the leeward side 102 to one end close to the windward side 101 in a straight line, a broken line, a wave shape, or an arc shape. Specifically, the water-guiding convex strip 141 extends from one end close to the leeward side 102 to one end close to the windward side 101 in a most rapid curve shape. When the water-guiding convex strip 141 is in a most rapid curve shape, the condensed water flows along the water-guiding convex strip 141 to the windward plate 120 at a faster speed, which can increase the discharge speed of the condensed water on the substrate 110 and reduce the residual condensed water on the substrate 110.

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

[0047] The water-guiding ridges 141 can be formed by the outward protrusion of the substrate 110, that is, the water-guiding ridges 141 of the first heat exchange surface 111 will form a corresponding concave groove on the second heat exchange surface 112, and the water-guiding ridges 141 of the second heat exchange surface 112 will form a corresponding concave groove on the first heat exchange surface 111. Therefore, in order to avoid each other, the water-guiding ridges 141 of the first heat exchange surface 111 and the water-guiding ridges 141 of the second heat exchange surface 112 are staggered in height. Forming the water-guiding ridges 141 in this way can not only guide the flow of condensed water, but also increase the heat exchange area by forming a concave groove on the other side, increase the disturbance of the airflow, improve the heat exchange efficiency, save materials and costs, and reduce 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 may be symmetrically arranged or staggered in height, and there is no limitation here.

[0049] Furthermore, the slits 130 are arranged in one-to-one correspondence with the tube holes 113, and the slits 130 extend from the lower edge of the water guiding portion 140 above the corresponding tube hole 113 to the upper edge of the water guiding 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 condensation water collection and discharge efficiency on the windward plate 120.

[0050] Specifically, one end of the slit 130 close to the upper water guide rib 141 extends to one end of the water guide rib 141 close to the windward plate 120, and one end of the slit 130 close to the lower water guide rib 141 extends to the middle of the water guide rib 141. At this time, the length of the slit 130 is long enough to effectively slow down the transfer of cold from the refrigerant pipe 210 in the pipe hole 113 to the windward plate 120.

[0051] In some embodiments, the substrate 110 is formed with a water guide 140 respectively located on the first heat exchange surface 111 and the second heat exchange surface 112. 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. The condensed water condensed on the side of the windward plate 120 on the same side of 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 to the first drainage groove 121 along the water guide 140. 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 to form a flow from top to bottom, the condensed water flows fast, the discharge efficiency is high, and it is not easy to form residue, thereby delaying the frosting of the fin 100.

[0052] At the same time, the connection between the curved windward plate 120 and the base plate 110 is inclined relative to the base plate 110, and the windward plate 120 and the base plate 110 surround and form a second drainage groove 122 extending along the height direction thereof, and 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 to the second drainage groove 122 along the water guide 140. Since the second drainage groove 122 extends along the height direction of the windward plate 120, the condensed water in the second drainage groove 122 gathers to form a flow from top to bottom, and the condensed water flows fast, has high discharge efficiency, and is not easy to form residue, thereby delaying the frosting of the fin 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 smaller than the height of the water guide 140 perpendicular to the second heat exchange surface 112, thereby reducing the resistance of the airflow passing 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 substrate 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 leave 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 a 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 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 airflow flow direction. The windward plate 120 is connected to the base plate 110 and is located on the windward side 101 of the base plate 110. Among them, 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 preferentially in contact with the airflow, and condensed water is more likely to condense on the windward plate 120. The slit 130 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 transmitting to the windward plate 120 area, thereby forming a relatively high temperature in the windward plate 120 area, so that the humid air flow does not frost immediately after condensing on the windward plate 120 or does not meet the frost conditions (the frost conditions are that the humid air condenses and the temperature continues to be 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 120 under the action of gravity. The condensed water on the windward plate 120 gathers quickly and flows quickly, and it 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 120 area, so that the moisture in the airflow can be effectively condensed on the windward plate 120, but there is no frosting condition, so that the windward plate 120 intercepts most of the moisture, and the condensed water condensed on the base plate 110 is reduced. The fin 100 improves the discharge efficiency of condensed water as a whole, has the advantages of not easy to frost and high heat exchange efficiency, thereby improving the overall heat exchange efficiency of the heat exchanger 200 and maintaining the ability of the heat exchanger 200 to continuously exchange heat in a low temperature and high humidity environment.

[0058] In some embodiments, the height of the water guide 140 protruding from the base plate 110 is less than or equal to half of the distance between two adjacent fins 100. The height of the water guide 140 protruding from the base plate 110 is appropriate, which can prevent excessive resistance to air flow while achieving the maximum collection of condensed water, 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, one quarter, etc. of the distance between two adjacent fins 100 , which is not limited here.

[0060] It should be noted that the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or vertical, but can be slightly tilted; the terms "parallel" and "vertical" and the like do not mean that the components are absolutely parallel or vertical, but can form a certain angle deviation. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In addition, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed when used, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0061] It is understood that the meaning of "plurality" in this article is at least two, such as two, three, etc., unless there is a special limitation. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. The term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[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 present application specification and drawings, or directly or indirectly used 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 tube hole is formed on the base plate for inserting a refrigerant tube, and the base plate has a windward side in the airflow direction; 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.

2. The fin according to claim 1, characterized in that: The substrate has a first heat exchange surface and a second heat exchange surface that are arranged opposite to each other. 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.

3. The fin according to claim 2, characterized in that: The base plate is provided with a plurality of the tube holes spaced apart along the height direction, and the water guide portion is respectively provided between every two adjacent tube holes.

4. The fin according to claim 3, characterized in that: 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.

5. The fin according to claim 3, characterized in that: The water guide portion includes at least one water guide convex strip, and the substrate also has a leeward side in the airflow direction. The water guide convex strip extends from the leeward side of the substrate to the windward side, and the height of the water guide convex strip gradually decreases from the leeward side to the windward side.

6. The fin according to claim 5, characterized in that: The water-guiding convex strip extends in a fastest curve shape from an end close to the leeward side to an end close to the windward side.

7. The fin according to claim 5, 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.

8. The fin according to any one of claims 1 to 7, characterized in that: The width of the slit is less than or equal to 0.2 mm.

9. The fin according to claim 2, characterized in that: The substrate is formed with the water guiding parts 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, and the second drainage groove and the second heat exchange surface are located on the same side.

10. The fin according to claim 9, 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.

11. A heat exchanger, characterized in that: It 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 10 which are arranged at intervals, and the refrigerant tube is passed through the tube hole.

12. The heat exchanger according to claim 11, characterized in that The height of the water guide portion protruding from the base plate is less than or equal to half of the interval between two adjacent fins.

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