Corrugated fin and tube heat exchanger

Abstract

The present application provides a kind of corrugated fin and tubular heat exchanger, it is related to heat exchanger technical field, to solve the technical problems that the corrugated fin tubular heat exchanger in prior art cannot consider heat exchange efficiency, air temperature uniformity and prevent dust, do not affect the structure strength of corrugated fin;A kind of corrugated fin, comprising several corrugated sections;Corrugated section includes upstream inclined section, downstream inclined section and corrugated platform, upstream inclined section and downstream inclined section are both inclined to be arranged, corrugated platform is arranged along front-back direction, downstream inclined section rear end is located in the direct back of upstream inclined section front end, downstream inclined section length is greater than upstream inclined section;First through hole or second through hole is provided on corrugated platform, the corrugated section with first through hole and the corrugated section with second through hole are alternately arranged in front-back direction;A kind of tubular heat exchanger, comprising several corrugated fins, several copper pipes and several spoiler tubes, several corrugated fins are equidistantly arranged along left-right direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a corrugated fin and a tube heat exchanger. BACKGROUND

[0002] The corrugated fin tube heat exchanger is a commonly used finned tube heat exchanger. The heat exchange efficiency is the most core performance index of the corrugated fin tube heat exchanger, which directly affects the system energy consumption and operating cost, and determines the equipment size, weight and initial cost. A high-efficiency heat exchanger can achieve the same heat exchange capacity with a smaller size, which makes the main machine more compact and lightweight. Smaller size also means less use of raw materials such as copper pipes and aluminum fins, directly reducing the procurement cost of materials and the manufacturing cost of equipment, especially reducing the procurement cost of copper materials. In space-expensive places (such as roof equipment layer, machine room, ship, vehicle, etc.), compact heat exchangers also have great size advantage. At the same time, it should be noted that the uniformity of the outlet air temperature is also a key indicator to measure the performance and quality of the corrugated fin tube heat exchanger, which is directly related to the stability and safety of the system. In many industrial processes (such as precision instrument manufacturing, lithium battery production, food drying, constant temperature and humidity machine room), the requirement for air temperature is extremely strict. Uneven outlet air temperature will cause the temperature field in the process area to fluctuate, which may affect product quality, or even cause the entire batch of products to be scrapped.

[0003] With the rapid development of large data centers, energy storage products and other industries, how to improve the heat exchange efficiency and the uniformity of the outlet air temperature of the corrugated fin tube heat exchanger at the same time has become a problem to be solved in the field of finned tube heat exchangers. The existing optimization methods mostly increase the disturbance to break the flow boundary layer by perforating the corrugated fin to achieve heat transfer enhancement, but this method will cause the problem of dust accumulation in the heat exchanger, which limits the application scenarios of the heat exchanger. In addition, the strength of the perforated corrugated fin is low, and it is easy to appear the lodging phenomenon. SUMMARY

[0004] In view of the deficiencies of the prior art, the first object of the present application is to provide a corrugated fin to solve the technical problems that the corrugated fin tube heat exchanger in the prior art cannot simultaneously consider the heat exchange efficiency, the uniformity of the outlet air temperature, the prevention of dust accumulation and the influence on the structural strength of the corrugated fin.

[0005] To solve the above technical problems, the present application provides a corrugated fin, comprising:

[0006] a plurality of corrugated sections connected in sequence along the front-rear direction;

[0007] The corrugated section comprises, from front to back, an upstream inclined section, a downstream inclined section and a corrugated platform, the upstream inclined section and the downstream inclined section are both inclinedly arranged in the left-right direction, the corrugated platform is arranged in the front-back direction, the rear end of the downstream inclined section is located directly behind the front end of the upstream inclined section, and the length of the downstream inclined section is greater than that of the upstream inclined section;

[0008] The plurality of corrugated sections comprise a plurality of first corrugated sections and a plurality of second corrugated sections, the length of the downstream inclined section in the first corrugated section is greater than that in the second corrugated section, and the first corrugated sections and the second corrugated sections are alternately connected in the front-back direction;

[0009] The corrugated platform of the first corrugated section is provided with a plurality of first through holes for mounting copper pipes, the corrugated platform of the second corrugated section is provided with a plurality of second through holes for mounting turbulence tubes, the first through holes and the second through holes are both arranged in the left-right direction, and the plurality of first through holes and the plurality of second through holes are both spaced apart in the up-down direction.

[0010] After the above structure is adopted, the corrugated fin in the application has the following advantages: since the rear end of the downstream inclined section is located directly behind the front end of the upstream inclined section, the widths of the upstream inclined section and the downstream inclined section in the left-right direction are equal, and since the length of the downstream inclined section is greater than that of the upstream inclined section, the upstream inclined section is closer to the left-right direction than the downstream inclined section; the copper pipes and the turbulence tubes are arranged in the first through holes and the second through holes of the respective corrugated platforms, the upstream inclined section adjacent to the corrugated platform can locally enhance the disturbance of the airflow at the copper pipes and the turbulence tubes, increase the airflow velocity at the copper pipes and the turbulence tubes, and strengthen the heat exchange process at the copper pipes and the turbulence tubes; in addition, a wake region with poor heat exchange effect is formed behind the copper pipes, and the length of the downstream inclined section in the first corrugated section being greater than that in the second corrugated section can reduce the area of the wake region behind the copper pipes, and increase the heat exchange area of the high-velocity region in front of the copper pipes and the turbulence tubes under the condition that the total length in the front-back direction is unchanged, thereby improving the heat exchange effect without increasing the overall front-back length; the turbulence tubes arranged at the second through holes enhance the mixing degree of the high-temperature gas between the copper pipes and the low-temperature gas in the vicinity of the copper pipe region, improve the uniformity of the outlet air temperature, guide the high-temperature gas between the copper pipes to flow to the low-temperature copper pipes, reduce the area of the wake region behind the copper pipes, and fully utilize the heat exchange performance of the low-temperature copper pipes; therefore, the corrugated fin in the application not only has high heat exchange efficiency but also has uniform outlet air temperature; although the corrugated fin in the application is provided with the first through holes and the second through holes, the copper pipes and the turbulence tubes are arranged in the first through holes and the second through holes respectively in the actual application to the tubular heat exchanger, thereby filling the first through holes and the second through holes, so that dust accumulation in the first through holes and the second through holes is avoided, and the overall structural strength of the corrugated fin is not affected.

[0011] As an improvement, the upstream inclined section of the first corrugated section is parallel to and equal in length to the upstream inclined section of the second corrugated section, and the corrugated platform of the first corrugated section is coplanar and equal in length to the corrugated platform of the second corrugated section.

[0012] As an improvement, the upstream inclined section of the first corrugated section and the upstream inclined section of the second corrugated section are each 0.5-1.5 mm in length, the downstream inclined section of the first corrugated section is 8-12 mm in length, the downstream inclined section of the second corrugated section is 3-5 mm in length, and the corrugated platform of the first corrugated section and the corrugated platform of the second corrugated section are each 0.8-1.2 mm in length; with this structure, a better heat exchange effect is achieved through reasonable size layout.

[0013] As an improvement, the width of the first corrugated section and the width of the second corrugated section in the left-right direction are each 0.8-1.2 mm; with this structure, the first corrugated section and the second corrugated section are consistent with the left-right width size of the corrugated fin in the prior art, facilitating production.

[0014] As an improvement, the first through holes on the adjacent first corrugated sections are staggered in the up-down direction; with this structure, the first corrugated section is consistent with the first through hole distribution of the corrugated fin in the prior art, facilitating production.

[0015] As an improvement, each second through hole is equal in center distance to the two adjacent first through holes in the up-down direction.

[0016] As an improvement, the second through hole is circular in cross section and 2.5-3.5 mm in diameter.

[0017] A second object of the present application is to provide a tubular heat exchanger comprising a plurality of the above-mentioned corrugated fins, a plurality of copper tubes, and a plurality of spoiler tubes, the plurality of corrugated fins being arranged at equal intervals in the left-right direction, the plurality of copper tubes being respectively inserted into the plurality of first through holes, and the plurality of spoiler tubes being respectively inserted into the plurality of second through holes.

[0018] With the above structure, the tubular heat exchanger has the following advantages: since the rear end of the downstream inclined section is located directly behind the front end of the upstream inclined section, the widths of the upstream inclined section and the downstream inclined section in the left-right direction are equal, and since the length of the downstream inclined section is greater than that of the upstream inclined section, the upstream inclined section is closer to the left-right direction than the downstream inclined section, and the copper pipe and the spoiler pipe are arranged at the first through hole and the second through hole of the respective corrugated platforms, the upstream inclined section adjacent to the corrugated platform can locally enhance the disturbance of the airflow at the copper pipe and the spoiler pipe, increase the airflow velocity at the copper pipe and the spoiler pipe, and strengthen the heat exchange process at the copper pipe and the spoiler pipe; in addition, the copper pipe forms a wake area with poor heat exchange effect behind it, and the length of the downstream inclined section in the first corrugated section being greater than the length of the downstream inclined section in the second corrugated section can reduce the area of the wake area behind the copper pipe, increase the heat exchange area of the high-velocity area in front of the copper pipe and the spoiler pipe under the condition that the total length in the front-rear direction is unchanged, and improve the heat exchange effect without increasing the overall length in the front-rear direction, the spoiler pipe arranged at the second through hole enhances the mixing degree of the high-temperature gas between the copper pipes and the low-temperature gas in the adjacent copper pipe area, improves the uniformity of the outlet air temperature, guides the high-temperature gas between the copper pipes to the low-temperature copper pipe, reduces the area of the wake area behind the copper pipe, and fully utilizes the heat exchange performance of the low-temperature copper pipe, therefore, the tubular heat exchanger has high heat exchange efficiency and uniform outlet air temperature, and the copper pipe and the spoiler pipe are arranged in the first through hole and the second through hole respectively, so that the first through hole and the second through hole are filled, and dust accumulation in the first through hole and the second through hole is avoided, and the structural strength of the corrugated fin and the tubular heat exchanger as a whole is not affected.

[0019] As an improvement, the spacing range of adjacent corrugated fins in the left-right direction is 1.6-2.8mm. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a cross-sectional view of a corrugated fin wave section in the present application.

[0021] Figure 2 FIG. 2 is a front view of a corrugated fin in the present application.

[0022] Figure 3 FIG. 3 is a comparison diagram of a first wave section and a second wave section in the present application.

[0023] Figure 4 FIG. 4 is a flow velocity distribution diagram of a corrugated fin in an embodiment of the present application.

[0024] Figure 5 FIG. 5 is a flow velocity distribution diagram of a corrugated fin in a comparative example.

[0025] Figure 6 FIG. 6 is a temperature distribution diagram of a corrugated fin in an embodiment of the present application.

[0026] Figure 7This is a temperature distribution diagram of the corrugated fins in the comparative example.

[0027] Figure 8 This is a temperature distribution diagram of the corrugated fin outlet in an embodiment of the present invention.

[0028] Figure 9 This is a temperature distribution diagram at the outlet of the corrugated fin in the comparative example.

[0029] Reference numerals: 100, first corrugated section; 200, second corrugated section; 1, upstream inclined section; 2, downstream inclined section; 3, corrugated platform; 4, first through hole; 5, second through hole. Detailed Implementation

[0030] The following detailed description of a corrugated finned tube heat exchanger according to the present invention is provided in conjunction with the accompanying drawings.

[0031] like Figures 1 to 3 As shown, a corrugated fin includes several corrugated segments connected sequentially in the front-to-back direction. The corrugated segments include an upstream inclined segment 1, a downstream inclined segment 2, and a corrugated platform 3 connected sequentially from front to back. That is, the upstream inclined segment 1 and the corrugated platform 3 are connected at the front and rear ends of the downstream inclined segment 2, respectively. The upstream inclined segment 1 and the downstream inclined segment 2 are both inclined in the left-to-right direction, that is, the rear end of the upstream inclined segment 1 is located to the left or right of its front end, and the rear end of the downstream inclined segment 2 is located to the left or right of its front end. The corrugated platform 3 is arranged in the front-to-back direction, and the rear end of the downstream inclined segment 2 is located directly behind the front end of the upstream inclined segment 1, so that the left-to-right width of the downstream inclined segment 2 is the same as the left-to-right width of the upstream inclined segment 1, and the length of the downstream inclined segment 2 is greater than that of the upstream inclined segment 1.

[0032] like Figure 2 As shown, the corrugated platform 3 is provided with several first through holes 4 for installing copper pipes or several second through holes 5 for installing baffle pipes. The corrugated sections with first through holes 4 and second through holes 5 are alternately arranged in the front-to-back direction. Both the first through holes 4 and second through holes 5 are arranged in the left-to-right direction, and the several first through holes 4 and several second through holes 5 are distributed at vertical intervals. The left-to-right arrangement of the first through holes 4 and second through holes 5 means that the axes of the first through holes 4 and the second through holes 5 are arranged in the left-to-right direction. It should be noted that the first through holes 4 and second through holes 5 being located on the corrugated platform 3 means that the centers of the first through holes 4 and second through holes 5 are located on the corresponding corrugated platform 3.

[0033] The corrugated segments include a plurality of first corrugated segments 100 and a plurality of second corrugated segments 200, the length of the downstream inclined segment 2 in the first corrugated segment 100 is greater than the length of the downstream inclined segment 2 in the second corrugated segment 200, the first corrugated segment 100 and the second corrugated segment 200 are alternately connected in the front-rear direction, a plurality of first through holes 4 are arranged on the corrugated platform 3 of the first corrugated segment 100, and a plurality of second through holes 5 are arranged on the corrugated platform 3 of the second corrugated segment 200. In the embodiment, the first corrugated segment 100 is the odd-numbered corrugated segment from front to back, and the second corrugated segment 200 is the even-numbered corrugated segment from front to back.

[0034] The upstream inclined segment 1 of the first corrugated segment 100 is parallel to the upstream inclined segment 1 of the second corrugated segment 200 and has the same length, and the corrugated platform 3 of the first corrugated segment 100 is coplanar with the corrugated platform 3 of the second corrugated segment 200 and has the same length; specifically, in the embodiment, the upstream inclined segment 1 is inclined from front to back and to the right, and the downstream inclined segment 2 is inclined from front to back and to the left, of course, in some other embodiments, the upstream inclined segment 1 can also be inclined from front to back and to the left, and the downstream inclined segment 2 can be inclined from front to back and to the right.

[0035] The length of the upstream inclined segment 1 of the first corrugated segment 100 and the length of the upstream inclined segment 1 of the second corrugated segment 200 are both in the range of 0.5-1.5 mm, the length of the downstream inclined segment 2 of the first corrugated segment 100 is in the range of 8-12 mm, the length of the downstream inclined segment 2 of the second corrugated segment 200 is in the range of 3-5 mm, the length of the corrugated platform 3 of the first corrugated segment 100 and the length of the corrugated platform 3 of the second corrugated segment 200 are both in the range of 0.8-1.2 mm, the width of the first corrugated segment 100 and the width of the second corrugated segment 200 in the left-right direction are both in the range of 0.8-1.2 mm, the thickness of the corrugated fin is in the range of 0.08-0.13 mm, the cross section of the second through hole 5 is circular and the diameter of the second through hole 5 is in the range of 2.5-3.5 mm, and the cross section of the first through hole 4 is also circular and the diameter of the first through hole 4 is 7 mm, the diameters of the first through hole 4 and the second through hole 5 correspond to the diameters of the copper tube and the spoiler tube. Since the diameters of the first through hole 4 and the second through hole 5 are both greater than the length of the corrugated platform 3, a part of the first through hole 4 and the second through hole 5 will extend to the upstream inclined segment 1 and the downstream inclined segment 2 adjacent to the corrugated platform 3.

[0036] As Figure 2As shown, the first through holes 4 on the adjacent first corrugated segments 100 are staggered in the up-down direction, wherein the adjacent first corrugated segments 100 refer to the first corrugated segment 100 and the nearest other first corrugated segment 100, such as the first first corrugated segment 100 and the second first corrugated segment 100 from front to back, which correspond to the first corrugated segment and the third corrugated segment from front to back. The first through holes 4 arranged in the up-down direction on the same first corrugated segment 100 are equidistantly arranged, and the centers of the adjacent first through holes 4 on each first corrugated segment 100 are equidistant, with a range of 9-11 mm.

[0037] In addition, the center distance of each second through hole 5 and the two adjacent first through holes 4 in the up-down direction is equal, and there is a row of second through holes 5 between the two rows of adjacent first through holes 4 at different heights.

[0038] The application also provides a tube heat exchanger, which comprises a plurality of the above-mentioned corrugated fins, a plurality of copper tubes and a plurality of spoiler tubes, the plurality of corrugated fins are equidistantly arranged in the left-right direction, the first through holes 4 are coaxially arranged, the second through holes 5 are coaxially arranged, the plurality of copper tubes are respectively inserted into the plurality of first through holes 4, and the plurality of spoiler tubes are respectively inserted into the plurality of second through holes 5, wherein the copper tubes are filled with flowing refrigerant, the spoiler tubes are hollow aluminum tubes, and the distance between the adjacent corrugated fins in the left-right direction ranges from 1.6 mm to 2.8 mm.

[0039] Since the rear end of the downstream inclined segment 2 is located directly behind the front end of the upstream inclined segment 1, the width of the upstream inclined segment 1 and the downstream inclined segment 2 in the left-right direction is equal, and since the length of the downstream inclined segment 2 is greater than that of the upstream inclined segment 1, the upstream inclined segment 1 is closer to the left-right direction than the downstream inclined segment 2, and the copper tubes and the spoiler tubes are arranged at the first through holes 4 and the second through holes 5 of the respective corrugated platforms 3, the upstream inclined segment 1 adjacent to the corrugated platform 3 can locally enhance the disturbance of the airflow at the copper tubes and the spoiler tubes, increase the airflow velocity at the copper tubes and the spoiler tubes, and strengthen the heat exchange process at the copper tubes and the spoiler tubes; the copper tube forms a wake area with poor heat exchange effect behind it, and the length of the downstream inclined segment 2 in the first corrugated segment 100 being greater than the length of the downstream inclined segment 2 in the second corrugated segment 200 can reduce the area of the wake area behind the copper tube, and increase the heat exchange area of the high flow velocity area in front of the copper tube and the spoiler tube under the condition that the total length in the front-back direction is unchanged, thereby improving the heat exchange effect under the premise of not increasing the overall front-back direction length.

[0040] In addition, the spoiler pipe arranged at the second through hole 5 enhances the mixing degree of the high-temperature gas between the copper pipes and the low-temperature gas in the vicinity of the copper pipe area, improves the uniformity of the outlet air temperature, guides the high-temperature gas between the copper pipes to the low-temperature copper pipe, reduces the wake area of the rear part of the copper pipe, and realizes the full use of the heat exchange performance of the low-temperature copper pipe. Therefore, the corrugated fin and the tube heat exchanger in the present application have high heat exchange efficiency and uniform outlet air temperature, are suitable for various industrial occasions with high temperature control requirements, and the copper pipe and the spoiler pipe are arranged in the first through hole 4 and the second through hole 5, respectively, so that the first through hole 4 and the second through hole 5 are filled, thereby preventing dust accumulation in the first through hole 4 and the second through hole 5, and without affecting the structural strength of the corrugated fin and the tube heat exchanger as a whole.

[0041] In the present embodiment, the length of the upstream inclined section 1 is 1 mm, the length of the downstream inclined section 2 of the first corrugated section 100 is 9 mm, the length of the downstream inclined section 2 of the second corrugated section 200 is 5 mm, the length of the corrugated platform 3 is 1 mm, the outer diameter of the copper pipe is 7 mm, the outer diameter of the spoiler pipe is 3 mm, the center distance between adjacent copper pipes is 10.5 mm, and the distance between left and right adjacent corrugated fins is 2 mm.

[0042] In the comparative example, the first corrugated section 100 and the second corrugated section 200 are not distinguished, the odd-numbered corrugated section and the even-numbered corrugated section are the same, and no spoiler pipe is arranged. The length of the upstream inclined section 1 is 4 mm, the length of the downstream inclined section 2 is 4 mm, the length of the corrugated platform 3 is 1 mm, the center distance between adjacent copper pipes is 10.5 mm, and the distance between left and right adjacent corrugated fins is 2 mm.

[0043] The tube heat exchangers of the present embodiment and the comparative example were tested under the test conditions of an ambient temperature of 27 degrees Celsius, an inlet air temperature of 27 degrees Celsius, a flow rate of 2 m / s, and a refrigerant temperature in the copper pipe of 5 degrees Celsius, and the results are shown in Figures 4 to 9 . Among them, Figure 4 is the flow velocity distribution diagram of the corrugated fin in the present embodiment, Figure 5 is the flow velocity distribution diagram of the corrugated fin in the comparative example, and it can be seen from the diagram that the airflow disturbance of the corrugated fin in the present embodiment at the copper pipe and the spoiler pipe is obviously greater than that in the comparative example; Figure 6 is the temperature distribution diagram of the corrugated fin in the present embodiment, Figure 7 is the temperature distribution diagram of the corrugated fin in the comparative example, Figure 8 is the temperature distribution diagram of the outlet of the corrugated fin in the present embodiment, Figure 9 is the temperature distribution diagram of the outlet of the corrugated fin in the comparative example, and among them, Figure 6 and Figure 7 , it can be seen that the temperature of the corrugated fin in the present embodiment is lower near the copper pipe and the spoiler pipe, Figure 8 and Figure 9 , it can be seen that the outlet temperature of the corrugated fin in the present embodiment is lower and more uniform.

[0044] In general, the heat exchange of one repeating unit of the corrugated fin in the embodiment of the present application (the connecting line of the center of the first through hole 4 with the same height in the front and back direction, the part of the corrugated fin between the upper and lower adjacent two connecting lines is one repeating unit) is 1.0W, which is higher than the heat exchange of one repeating unit of the corrugated fin in the comparative example 0.93W; the outlet temperature of the embodiment of the present application is between 6.7-7.0 degrees Celsius, and the outlet temperature of the comparative example is between 7.5-10.5 degrees Celsius, the outlet temperature of the embodiment of the present application is not only lower than that of the comparative example as a whole, but also the uniformity of the outlet temperature is significantly better than that of the comparative example, the gas temperature difference of the outlet of the embodiment of the present application can reach within 0.3 degrees Celsius at a distance of 0.9cm from the tubular heat exchanger.

[0045] The embodiment of the present application is described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned one embodiment, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A corrugated fin characterized by, The utility model relates to a corrugated fin, comprising: a plurality of corrugated segments connected in sequence along the front-rear direction; the corrugated segment comprises upstream inclined segments (1), downstream inclined segments (2) and corrugated platforms (3) connected in sequence from front to back, the upstream inclined segments (1) and the downstream inclined segments (2) are both inclinedly arranged in the left-right direction, the corrugated platforms (3) are arranged along the front-rear direction, the rear end of the downstream inclined segments (2) is located directly behind the front end of the upstream inclined segments (1), and the length of the downstream inclined segments (2) is greater than that of the upstream inclined segments (1); a plurality of the corrugated segments comprise a plurality of first corrugated segments (100) and a plurality of second corrugated segments (200), the length of the downstream inclined segments (2) in the first corrugated segments (100) is greater than that in the second corrugated segments (200), and the first corrugated segments (100) and the second corrugated segments (200) are alternately connected in the front-rear direction; a plurality of first through holes (4) for mounting copper pipes are arranged on the corrugated platforms (3) of the first corrugated segments (100), a plurality of second through holes (5) for mounting spoiler pipes are arranged on the corrugated platforms (3) of the second corrugated segments (200), the first through holes (4) and the second through holes (5) are both arranged in the left-right direction, and a plurality of the first through holes (4) and a plurality of the second through holes (5) are both spaced apart in the up-down direction.

2. The corrugated fin of claim 1 wherein, the upstream inclined segments (1) of the first corrugated segments (100) are parallel to the upstream inclined segments (1) of the second corrugated segments (200) and have equal lengths, and the corrugated platforms (3) of the first corrugated segments (100) are coplanar with the corrugated platforms (3) of the second corrugated segments (200) and have equal lengths.

3. The corrugated fin of claim 2 wherein, the lengths of the upstream inclined segments (1) of the first corrugated segments (100) and the second corrugated segments (200) are both in the range of 0.5-1.5 mm, the length of the downstream inclined segments (2) of the first corrugated segments (100) is in the range of 8-12 mm, the length of the downstream inclined segments (2) of the second corrugated segments (200) is in the range of 3-5 mm, and the lengths of the corrugated platforms (3) of the first corrugated segments (100) and the second corrugated segments (200) are both in the range of 0.8-1.2 mm.

4. The corrugated fin of claim 2 wherein, the widths of the first corrugated segments (100) and the second corrugated segments (200) in the left-right direction are both in the range of 0.8-1.2 mm.

5. The corrugated fin of claim 1 wherein, a plurality of the first through holes (4) on adjacent first corrugated segments (100) are staggered in the up-down direction.

6. The corrugated fin of claim 1 wherein, the center distance of each second through hole (5) and the two adjacent first through holes (4) in the up-down direction is equal.

7. The corrugated fin of claim 1 wherein, the second through holes (5) are circular in cross section and have a diameter in the range of 2.5-3.5 mm.

8. A tube heat exchanger, characterized by the utility model further comprises a plurality of copper pipes and a plurality of spoiler pipes, a plurality of the corrugated fins are equally spaced in the left-right direction, a plurality of the copper pipes are respectively inserted into a plurality of the first through holes (4), and a plurality of the spoiler pipes are respectively inserted into a plurality of the second through holes (5).

9. The tubular heat exchanger of claim 8, wherein, The pitch of the adjacent corrugated fins in the left-right direction is in the range of 1.6-2.8 mm. The pitch of the adjacent corrugated fins in the left-right direction is in the range of 1.6-2.8 mm.

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