Fin-tube heat exchangers, evaporative condensers and refrigeration units

Abstract

The present disclosure provides a fin-tube heat exchanger, an evaporative condenser and a refrigeration unit. The fin-tube heat exchanger includes a heat exchange tube and a plurality of fins, wherein the fin includes: a fin body having an airflow inlet end and an airflow outlet end that are relatively arranged, the heat exchange tube is passed through the fin body, the fin bodies of the plurality of fins form an airflow channel, the airflow for heat exchange with the fin-tube heat exchanger enters the airflow channel from the airflow inlet end and leaves the airflow channel from the airflow outlet end; and a water retaining portion, the water retaining portion is arranged on the fin body and located in the airflow channel to block water droplets carried in the airflow, wherein the water retaining portion includes at least one of a first water retaining structure arranged at the airflow inlet end of the fin body and a second water retaining structure arranged at the airflow outflow end of the fin body. The fin-tube heat exchanger of the embodiment of the present disclosure has a self-contained water retaining function and has excellent water retaining capacity.

Description

Technical Field

[0001] The present disclosure relates to the field of heat exchange technology, and in particular to a fin-tube heat exchanger, an evaporative condenser and a refrigeration unit. Background Art

[0002] Air-cooled large commercial units, such as subway magnetic levitation direct refrigeration units and rooftop units, usually have a water baffle or water remover between the condenser and the fan because of their large fan air volume to prevent condensed water from running around at the rear end of the unit with the wind field. If a water baffle is not installed, condensed water will run around between the fin evaporator and the fan, and not all condensed water will fall into the water tray, which can easily lead to water accumulation in the refrigeration unit and affect the service life of the refrigeration unit.

[0003] In addition, when some condensed water is blown into the air duct from the fan along with the air flow and then transported to the terminal, the following adverse effects will be caused: 1. Condensed water is spread inside the air duct for a long time, causing corrosion of the air duct and reducing the service life of the air duct, and there is also the risk of rust being blown out; 2. Condensed water accumulates in the air duct for a long time, and the moist and mild temperature volume breeds mosquitoes and bacteria, affecting the health of customers; 3. Condensed water drips directly from the terminal air outlet, affecting the customer experience and easily causing customer complaints.

[0004] The operating environment of the evaporative cooling unit is similar to that of a cooling tower. Water is constantly sprayed and circulated inside the evaporative condenser, and there is heat exchange on the wind side. Therefore, a water baffle needs to be added in the air duct direction of the core evaporative heat exchanger. Setting up a water baffle will increase or occupy the space of the refrigeration unit. Summary of the invention

[0005] The purpose of the present disclosure is to provide a fin-tube heat exchanger, an evaporative condenser and a refrigeration unit. The fin-tube heat exchanger has a water-blocking function.

[0006] A first aspect of the present disclosure provides a fin-tube heat exchanger, comprising a heat exchange tube and a plurality of fins, wherein the fins include:

[0007] The fin body has an airflow inlet end and an airflow outlet end which are arranged opposite to each other, the heat exchange tube is passed through the fin body, the fin body of the plurality of fins forms an airflow channel, and the airflow for heat exchange with the fin-tube heat exchanger enters the airflow channel from the airflow inlet end and leaves the airflow channel from the airflow outlet end; and

[0008] A water retaining portion is arranged on the fin body and located in the airflow channel to block water droplets carried in the airflow, wherein the water retaining portion includes at least one of a first water retaining structure arranged at the airflow inlet end of the fin body and a second water retaining structure arranged at the airflow outflow end of the fin body.

[0009] In some embodiments, the first water retaining structure includes two first water retaining strips with arc-shaped cross-sections and arranged opposite to each other in the arc shape, the first water retaining strips having a connecting end and a free end arranged opposite to each other and respectively located at both ends of the arc shape, the connecting ends of the two first water retaining strips are connected to the outer edge of the airflow inflow end of the fin body, and the free ends of the two first water retaining strips are arranged at intervals.

[0010] In some embodiments, the second water retaining structure includes at least one water retaining edge protruding from an outer edge of the airflow outflow end of the fin body toward the outer side of the fin body and bending toward the airflow inflow end.

[0011] In some embodiments, the at least one water retaining edge comprises:

[0012] a first water retaining edge, protruding from an outer edge of the airflow outflow end of the fin body toward an outer side of the first side surface of the fin body and bending toward the airflow inflow end;

[0013] The second water retaining edge protrudes from the outer edge of the airflow outflow end of the fin body toward the outer side of a second side surface of the fin body opposite to the first side surface and bends toward the airflow inflow end.

[0014] In some embodiments, the second water retaining structure includes two second water retaining strips with an arc-shaped cross-section and arranged opposite to each other in the arc shape, the second water retaining strips having a connecting end and a free end respectively arranged opposite to each other at both ends of the arc shape, the connecting ends of the two second water retaining strips are connected to the outer edge of the airflow outflow end of the fin body, and the free ends of the two second water retaining strips are arranged at intervals.

[0015] In some embodiments, the water retaining portion includes a third water retaining structure disposed between the airflow inflow end and the airflow outflow end.

[0016] In some embodiments, the heat exchange tube extends along a first direction, the fin body includes two or more inclined portions connected end to end, the inclined portions are inclined relative to a plane perpendicular to the first direction, and the third water retaining structure is arranged at the connection between two adjacent inclined portions.

[0017] In some embodiments, the third water retaining structure includes a third water retaining edge, which extends outward along the edge of the inclined portion of the two adjacent inclined portions close to the airflow outflow end and close to the airflow inflow end and bends toward the inclined portion of the two adjacent inclined portions close to the airflow inflow end.

[0018] In some embodiments, the fin includes a rectifying portion, and the rectifying portion is used to adjust the flow direction of the airflow.

[0019] In some embodiments, the rectifying portion includes a rectifying strip disposed at an airflow inlet end of the fin body, and the rectifying strip is used to adjust the flow direction of the airflow when entering the airflow channel.

[0020] In some embodiments, the heat exchange tube extends along a first direction, and the fin body includes at least one inclined portion, which is inclined relative to a plane perpendicular to the first direction, and is used to change the flow direction of the airflow to block water droplets carried in the airflow, wherein at least one of the airflow inlet end and the airflow outlet end is an outer end of one of the inclined portions.

[0021] In some embodiments, the fin body includes two or more inclined portions connected end to end.

[0022] In some embodiments, the heat exchange tube passes through a middle portion of the inclined portion.

[0023] In some embodiments, a plurality of the fins are arranged side by side and spaced apart along the first direction, and projections of adjacent fins in a second direction from the airflow inlet end to the airflow outlet end and perpendicular to the first direction partially overlap.

[0024] A second aspect of the present disclosure provides an evaporative condenser, comprising:

[0025] a first heat exchanger;

[0026] a spraying device, comprising a nozzle disposed above the first heat exchanger, the nozzle being used to spray a coolant onto the first heat exchanger;

[0027] a fan, disposed above the nozzle, for driving an airflow for exchanging heat with the coolant and the first heat exchanger to flow through the first heat exchanger;

[0028] The second heat exchanger includes the fin-tube heat exchanger described in the first aspect of the present disclosure, wherein the fin-tube heat exchanger is arranged between the fan and the nozzle so that the airflow driven by the fan flows through the airflow channel, and the airflow inlet end of the fin body of the fin-tube heat exchanger is located below the airflow outflow end.

[0029] A third aspect of the present disclosure provides a refrigeration unit, comprising the fin-tube heat exchanger described in the first aspect of the present disclosure or the evaporative condenser described in the second aspect of the present disclosure.

[0030] Based on the fin-tube heat exchanger provided by the present disclosure, the first water retaining structure can be set to block at least part of the water droplets from entering the airflow channel at the beginning of the airflow flowing into the airflow channel, which is helpful to prevent the water droplets from running around. The second water retaining structure can be set to block at least part of the water droplets before the airflow flows out of the airflow channel, preventing the water droplets from following the airflow to leave the airflow channel and enter the air duct or the end of the refrigeration unit. Therefore, the fin-tube heat exchanger of the embodiment of the present disclosure has a built-in water retaining function and has excellent water retaining ability.

[0031] Based on the evaporative condenser provided by the present invention, since the fin-tube heat exchanger has its own water-retaining function, it can replace the water retaining plate or water remover in the prior art. There is no need for an external water retaining plate or water remover. The fin-tube heat exchanger can be directly added to the space where the water retaining plate or water remover was originally installed. This not only does not occupy too much space, but also improves the capacity and energy efficiency of the refrigeration unit using the evaporative condenser, which is beneficial to energy conservation and environmental protection, as well as improving market competitiveness.

[0032] The refrigeration unit provided based on the present disclosure has the advantages of the fin-tube heat exchanger or evaporative condenser of the present disclosure.

[0033] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0035] Figure 1 It is a three-dimensional schematic diagram of a partial structure of a fin-tube heat exchanger according to an embodiment of the present disclosure.

[0036] Figure 2 It is a schematic diagram of the top view of the structure of the fin-tube heat exchanger of the embodiment of the present disclosure.

[0037] Figure 3 for Figure 2 A schematic side structural diagram of the fin-tube heat exchanger of the illustrated embodiment.

[0038] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure is shown.

[0039] Figure 5 for Figure 2 A schematic diagram of the three-dimensional structure of the fins in the fin-tube heat exchanger of the illustrated embodiment.

[0040] Figure 6 for Figure 5 Schematic diagram of the end structure of the fin shown.

[0041] Figure 7 It is a schematic diagram of the three-dimensional structure of the evaporative condenser according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0045] In the description of the present disclosure, it should be understood that the directional words are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0046] like Figures 1 to 6 As shown, the embodiment of the present disclosure provides a fin-tube heat exchanger 30. The fin-tube heat exchanger 30 includes a heat exchange tube 31 and a plurality of fins 32. The fin 32 includes a fin body 321 and a water retaining portion.

[0047] The fin body 321 has an airflow inflow end and an airflow outflow end that are relatively arranged. The water retaining portion is arranged on the fin body 321 and is located in the airflow flow channel 34 to block water droplets carried in the airflow. The water retaining portion includes at least one of a first water retaining structure 322 arranged at the airflow inflow end of the fin body 321 and a second water retaining structure 323 arranged at the airflow outflow end of the fin body 321. In the present embodiment, the water retaining portion of the fin 32 includes a first water retaining structure 322 and a second water retaining structure 323.

[0048] The heat exchange tube 31 is passed through the fin body 321, and the fin body 321 of the plurality of fins 32 forms an airflow channel 34. The airflow for heat exchange with the fin-tube heat exchanger 30 enters the airflow channel 34 from the airflow inlet end and leaves the airflow channel 34 from the airflow outlet end.

[0049] exist Figure 3 and Figure 4 In the embodiment, the end where the air flows in is the lower end, and the end where the air flows out is the upper end.

[0050] The first water retaining structure 322 can be provided to block at least some water droplets from entering the airflow channel 34 at the beginning of the airflow flowing into the airflow channel 34, which is helpful to prevent the water droplets from running around. The second water retaining structure 323 can be provided to block at least some water droplets before the airflow flows out of the airflow channel 34, preventing the water droplets from following the airflow to leave the airflow channel 34 and enter the air duct or the end of the refrigeration unit. Therefore, the fin-tube heat exchanger 30 of the embodiment of the present disclosure has a self-contained water retaining function and has excellent water retaining ability.

[0051] like Figures 3 to 6 As shown, the first water retaining structure 322 includes two first water retaining strips 3221 with an arc-shaped cross section and the arcs are arranged oppositely, the first water retaining strips 3221 have connecting ends and free ends respectively located at two ends of the arc and arranged oppositely, the connecting ends of the two first water retaining strips 3221 are connected to the outer edge of the airflow inflow end of the fin body 321, and the free ends of the two first water retaining strips 3221 are arranged at intervals. The two first water retaining strips 3221 are combined to form a buckle form, which can increase the vortex of the airflow flowing through, thereby facilitating the blocking of water droplets in the airflow.

[0052] like Figures 3 to 6 As shown, the second water retaining structure 323 includes at least one water retaining edge protruding from the outer edge of the airflow outflow end of the fin body 321 toward the outer side of the fin body 321 and bending toward the airflow inflow end.

[0053] like Figures 3 to 6As shown, at least one water retaining edge includes a first water retaining edge 3231 and a second water retaining edge 3232. The first water retaining edge 3231 protrudes from the outer edge of the airflow outflow end of the fin body 321 toward the outer side of the first side of the fin body 321 and bends toward the airflow inflow end. The second water retaining edge 3232 protrudes from the outer edge of the airflow outflow end of the fin body 321 toward the outer side of the second side opposite to the first side of the fin body 321 and bends toward the airflow inflow end.

[0054] Providing a water retaining edge can effectively block water droplets in the airflow and facilitate the blocked water droplets to drip or flow downwards.

[0055] like Figures 3 to 6 As shown, the second water retaining structure 323 includes two second water retaining strips 3233 with an arc-shaped cross section and the arcs are arranged oppositely, and the second water retaining strips 3233 have connecting ends and free ends that are respectively located at both ends of the arc and are arranged oppositely, and the connecting ends of the two second water retaining strips 3233 are connected to the outer edge of the airflow outflow end of the fin body 321, and the free ends of the two second water retaining strips 3233 are arranged at intervals. The two second water retaining strips 3233 are combined to form a buckle form, which can increase the vortex of the airflow flowing through, thereby facilitating the blocking of water droplets in the airflow.

[0056] like Figures 3 to 6 As shown, the water retaining portion includes a third water retaining structure 324 disposed between the airflow inflow end and the airflow outflow end.

[0057] In some embodiments, the heat exchange tube 31 extends along the first direction, and the fin body 321 includes two or more inclined portions 3211 connected end to end. The inclined portions 3211 are inclined relative to a plane perpendicular to the first direction, and the third water retaining structure 324 is disposed at the connection between two adjacent inclined portions 3211.

[0058] The third water retaining structure 324 can further improve the water retaining efficiency. The connection between two adjacent inclined portions 3211 is where the airflow turns. The third water retaining structure 324 is disposed at the connection between two adjacent inclined portions 3211, which is conducive to retaining more water drops.

[0059] like Figures 3 to 6 As shown, the third water retaining structure 324 includes a third water retaining edge, which extends outward along the edge of the inclined portion 3211 close to the airflow outflow end of the two adjacent inclined portions 3211 and is bent toward the inclined portion 3211 close to the airflow inflow end of the two adjacent inclined portions 3211.

[0060] The third water-blocking edge is helpful for more effectively blocking water droplets in the airflow, and is helpful for the blocked water droplets to drip or flow downwards.

[0061] like Figures 3 to 6As shown, the fin 32 includes a rectifying portion 325 for adjusting the flow direction of the airflow. In this embodiment, the rectifying portion 325 includes a rectifying strip disposed at the airflow inflow end of the fin body 321 for adjusting the flow direction of the airflow when entering the airflow channel 34.

[0062] like Figures 3 to 6 As shown, in this embodiment, the heat exchange tube 31 extends along the first direction, and the fin body 321 includes at least one inclined portion 3211, which is inclined relative to a plane perpendicular to the first direction, and the inclined portion 3211 is used to change the flow direction of the airflow to block water droplets carried in the airflow. Among them, at least one of the airflow inflow end and the airflow outflow end is the outer end of an inclined portion 3211. This arrangement is conducive to improving the efficiency of water blocking.

[0063] In some embodiments, the fin body 321 includes two or more inclined portions 3211 connected end to end. Figures 3 to 6 As shown, in this embodiment, two inclined portions 3211 are included, one end of the two inclined portions 3211 is connected, and the fin body 321 has a V-shaped cross section. The connection between the two inclined portions 3211 is rounded.

[0064] The fin body 321 can also be processed into a W-shaped cross section or other folded forms. When the airflow passes through the multi-fold airflow channel formed by the fin body 321, the water vapor carried by the airflow will be blocked and drip or fall back along the surface of the fin 32 under the influence of gravity when passing through each turning or water retaining structure.

[0065] In some embodiments, the heat exchange tube 31 passes through the middle of the inclined portion 3211. Figure 5 As shown, a row of through holes 3211A is provided in the middle of the inclined portion 3211 , and the through holes 3211A cooperate with the heat exchange tube 31 after the fin 32 and the heat exchange tube 31 are assembled.

[0066] The plurality of fins 32 are arranged side by side and spaced apart along the first direction, and the projections of adjacent fins 32 in a second direction from the airflow inlet end to the airflow outlet end and perpendicular to the first direction partially overlap. This arrangement is conducive to preventing part of the airflow from directly passing from the airflow inlet end to the airflow outlet end, and is conducive to improving the efficiency of water blocking.

[0067] like Figures 1 to 3 As shown, in this embodiment, the fin-tube heat exchanger 30 further includes a heat exchanger shell 33. The heat exchange tubes 31 and the fins 32 are supported on the heat exchanger shell 33. Figure 1 and Figure 3 In FIG. 3 , in order to show the internal structure of the fin-tube heat exchanger 30 , part of the structure of the heat exchanger shell 33 is removed.

[0068] like Figure 7As shown, the embodiment of the present disclosure further provides an evaporative condenser. The evaporative condenser includes a first heat exchanger 10, a spray device 20, a second heat exchanger and a fan 40.

[0069] The spray device 20 includes a nozzle disposed above the first heat exchanger 10 , and the nozzle is used to spray coolant toward the first heat exchanger 10 .

[0070] The fan 40 is disposed above the nozzle and is used to drive the airflow for exchanging heat with the coolant and the first heat exchanger 10 to flow through the first heat exchanger 10;

[0071] The second heat exchanger includes the aforementioned fin-tube heat exchanger 30. The fin-tube heat exchanger 30 is disposed between the fan 40 and the nozzle so that the airflow driven by the fan 40 flows through the airflow channel 34. The airflow inlet end of the fin body 321 of the fin-tube heat exchanger 30 is located below the airflow outlet end.

[0072] In the evaporative condenser of the present embodiment, since the fin-tube heat exchanger 30 has its own water-retaining function, it can replace the water retaining plate or water remover in the prior art. No external water retaining plate or water remover is required. The fin-tube heat exchanger 30 can be directly added to the space where the water retaining plate or water remover was originally installed. This not only does not occupy too much space, but also improves the capacity and energy efficiency of the refrigeration unit using the evaporative condenser, which is beneficial to energy conservation and environmental protection, and improves market competitiveness.

[0073] The fin tube heat exchanger 30 can be used as a preheater for the first heat exchanger 10. The refrigerant can be precooled by passing through the heat exchange tubes 31 of the fin tube heat exchanger 30, and then the precooled refrigerant enters the first heat exchanger to further cool the refrigerant and improve the refrigerant supercooling.

[0074] The disclosed embodiment also provides a refrigeration unit, including the aforementioned fin-tube heat exchanger or the aforementioned evaporative condenser.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. A fin-tube heat exchanger, comprising a heat exchange tube (31) and a plurality of fins (32), characterized in that: The fin (32) comprises: The fin body (321) has an airflow inlet end and an airflow outlet end which are arranged opposite to each other, the heat exchange tube (31) is passed through the fin body (321), the fin body (321) of the plurality of fins (32) forms an airflow channel (34), and the airflow for heat exchange with the fin-tube heat exchanger (30) enters the airflow channel (34) from the airflow inlet end and leaves the airflow channel (34) from the airflow outlet end; and A water retaining portion, the water retaining portion is arranged on the fin body (321) and is located in the airflow channel (34) to block water droplets carried in the airflow, wherein the water retaining portion includes a first water retaining structure (322) arranged at the airflow inflow end of the fin body (321), the first water retaining structure (322) includes two first water retaining strips (3221) with arc-shaped cross-sections and arranged opposite to each other in the arc shape, the first water retaining strips (3221) have a connecting end and a free end respectively arranged opposite to each other at two ends of the arc shape, the connecting end of the two first water retaining strips (3221) is connected to the outer edge of the airflow inflow end of the fin body (321), and the free ends of the two first water retaining strips (3221) are arranged at intervals.

2. The fin-tube heat exchanger according to claim 1, characterized in that: The water retaining portion comprises a second water retaining structure (323) arranged at the airflow outflow end of the fin body (321), the second water retaining structure (323) comprising at least one water retaining edge protruding from the outer edge of the airflow outflow end of the fin body (321) toward the outer side of the fin body (321) and bending toward the airflow inflow end.

3. The fin-tube heat exchanger according to claim 2, characterized in that: The at least one water retaining edge comprises: A first water retaining edge (3231) protrudes from the outer edge of the airflow outflow end of the fin body (321) toward the outer side of the first side surface of the fin body (321) and bends toward the airflow inflow end; The second water retaining edge (3232) protrudes from the outer edge of the airflow outflow end of the fin body (321) toward the outer side of the second side surface of the fin body (321) opposite to the first side surface and bends toward the airflow inflow end.

4. The fin-tube heat exchanger according to claim 2, characterized in that: The second water retaining structure (323) comprises two second water retaining strips (3233) having an arc-shaped cross-section and arranged opposite to each other in the arc shape, the second water retaining strips (3233) having a connecting end and a free end respectively located at two ends of the arc shape and arranged opposite to each other, the connecting ends of the two second water retaining strips (3233) being connected to the outer edge of the airflow outflow end of the fin body (321), and the free ends of the two second water retaining strips (3233) being arranged at intervals.

5. The fin-tube heat exchanger according to claim 1, characterized in that: The water retaining portion comprises a third water retaining structure (324) arranged between the airflow inflow end and the airflow outflow end.

6. The fin-tube heat exchanger according to claim 5, characterized in that: The heat exchange tube (31) extends along a first direction, the fin body (321) comprises two or more inclined portions (3211) connected end to end in sequence, the inclined portions (3211) are arranged obliquely relative to a plane perpendicular to the first direction, and the third water retaining structure (324) is arranged at the connection between two adjacent inclined portions (3211).

7. The fin-tube heat exchanger according to claim 6, characterized in that: The third water retaining structure (324) comprises a third water retaining edge, the third water retaining edge extending outwardly along an edge of the inclined portion (3211) close to the airflow outflow end of the two adjacent inclined portions (3211) and close to the airflow inflow end, and bending towards the inclined portion (3211) close to the airflow inflow end of the two adjacent inclined portions (3211).

8. The fin-tube heat exchanger according to claim 1, characterized in that: The fin (32) comprises a rectifying portion (325), and the rectifying portion (325) is used to adjust the flow direction of the airflow.

9. The fin-tube heat exchanger according to claim 8, characterized in that: The rectifying portion (325) comprises a rectifying strip arranged at the airflow inflow end of the fin body (321), the rectifying strip being used to adjust the flow direction of the airflow when entering the airflow channel (34).

10. The fin-tube heat exchanger according to any one of claims 1 to 9, characterized in that: The heat exchange tube (31) extends along a first direction, and the fin body (321) comprises at least one inclined portion (3211), wherein the inclined portion (3211) is arranged to be inclined relative to a plane perpendicular to the first direction, and the inclined portion (3211) is used to change the flow direction of the airflow to block water droplets carried in the airflow, wherein at least one of the airflow inlet end and the airflow outlet end is an outer end of one of the inclined portions (3211).

11. The fin-tube heat exchanger according to claim 10, characterized in that: The fin body (321) comprises two or more inclined portions (3211) connected end to end in sequence.

12. The fin-tube heat exchanger according to claim 10, characterized in that: The heat exchange tube (31) passes through the middle of the inclined portion (3211).

13. The fin-tube heat exchanger according to claim 10, characterized in that: The plurality of fins (32) are arranged side by side and spaced apart along the first direction, and projections of adjacent fins (32) in a second direction from the airflow inlet end to the airflow outlet end and perpendicular to the first direction partially overlap.

14. An evaporative condenser, characterized in that: include: A first heat exchanger (10); A spray device (20), comprising a nozzle arranged above the first heat exchanger (10), the nozzle being used to spray a cooling liquid onto the first heat exchanger (10); a fan (40), arranged above the nozzle, and used to drive an airflow for exchanging heat with the coolant and the first heat exchanger (10) to flow through the first heat exchanger (10); A second heat exchanger, comprising the fin-tube heat exchanger (30) according to any one of claims 1 to 13, wherein the fin-tube heat exchanger (30) is arranged between the fan (40) and the nozzle so that the airflow driven by the fan (40) flows through the airflow channel (34), and the airflow inlet end of the fin body (321) of the fin-tube heat exchanger (30) is located below the airflow outlet end.

15. A refrigeration unit, characterized in that: It comprises the fin-tube heat exchanger according to any one of claims 1 to 13 or the evaporative condenser according to claim 14.

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