CN219798054U - Fin and air conditioner - Google Patents

Abstract

The utility model provides a fin and an air conditioner, wherein the fin comprises: the radiating fin is provided with a first radiating surface on one side, and a through hole is formed in the first radiating surface; the drainage structure is connected to the position of the first radiating surface corresponding to the through hole; the drainage structure is used for conducting air flow passing through the first radiating surface to the other side of the radiating fin far away from the first radiating surface through the through hole. The utility model solves the problem that the heat exchange capacity is slightly improved only by arranging the through holes on the fins.

Description

Fin and air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a fin and an air conditioner.

Background

At present, in a household air conditioner, a heat exchanger is one of important working parts, the heat exchanger comprises a condenser and an evaporator, the whole heat exchanger not only occupies most of the volume of the whole air conditioning system, but also directly influences the performance and cost of the whole system, the improvement of the thermal performance of the heat exchanger has important significance for improving the energy efficiency ratio of the air conditioner, and the heat exchanger is provided with fins for effectively carrying out heat exchange, so that the effect of good heat dissipation is achieved.

In order to improve the heat exchange performance of the fins, a common improvement mode is to provide through holes on the fins, so that air flow is disturbed through the through holes to realize full contact between the air flow and the surfaces of the fins, and further the effect of increasing the heat exchange capacity is achieved. However, there is at least one of the following problems in the related art: the improvement of the heat exchange capacity brought by only arranging the through holes on the fins is small.

Disclosure of Invention

The utility model solves the problem that the heat exchange capacity is slightly improved only by arranging the through holes on the fins.

In order to solve the above problems, the present utility model provides a fin comprising: the radiating fin is provided with a first radiating surface on one side, and a through hole is formed in the first radiating surface; the drainage structure is connected to the position of the first radiating surface corresponding to the through hole; the drainage structure is used for conducting air flow passing through the first radiating surface to the other side of the radiating fin far away from the first radiating surface through the through hole.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: in particular, the fins are applied to, for example, a heat exchanger of an air conditioner, the heat exchanger including, for example, a heat exchange tube, and an air duct for passing an air flow is formed between two adjacent fins connected to the heat exchange tube. Through the through holes arranged on the radiating fins, air flow entering the air duct can enter another air duct adjacent to the air duct through the through holes, so that the air flow disturbance in the other air duct is enhanced, and the heat exchange performance of the fins is improved. And furthermore, the drainage structure is arranged at the position corresponding to the through hole, so that a further drainage effect is achieved on the air flow, the air flow entering the other air duct through the through hole is increased, and the air flow disturbance capacity and the heat exchange performance of the fins are further improved.

In one example of the utility model, the drainage structure is a drainage surface on one side close to the through hole; an included angle a formed between a plane surrounded by the position of the opening formed by the through hole on the first radiating surface and the drainage surface is more than or equal to 30 degrees and less than or equal to 90 degrees.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: in a specific example, the installation position of the fin on the heat exchange tube is adjusted so that the opening direction forming the included angle is opposite to the airflow flowing direction, then airflow flows on the first radiating surface until the airflow enters a drainage space formed by clamping the drainage structure and the radiating fin, under the drainage effect of the drainage structure, the airflow enters the other side of the radiating fin far away from the first radiating surface through the through hole in the drainage space, so that the airflow disturbance of the other side is improved, the heat exchange performance of the fin is improved, and the situation that the drainage structure cannot fully drain the airflow contacted with the airflow into the through hole when the airflow forms an obtuse angle is effectively avoided.

In one example of the utility model, the radiating fin is provided with a second radiating surface opposite to the first radiating surface, and the through holes comprise a first through hole and a second through hole; the drainage structure includes: the first drainage piece is connected to the first radiating surface at a position corresponding to the first through hole; the second drainage piece is connected to the position of the second radiating surface corresponding to the second through hole.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the air flow disturbance capacity of the air flow passing through the radiating fins is further improved, and therefore the heat exchange capacity of the fins is improved.

In one example of the present utility model, the shape of the through hole includes at least one of a circular arc hole, a square hole, or a rectangular hole.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: according to different actual use scenes and demands of the fins, the adaptive opening shapes are correspondingly selected, so that the heat exchange quantity can be increased to a certain extent under the condition that the total heat exchange area of the fins is kept unchanged or reduced.

In one example of the utility model, the heat sink is a corrugated sheet comprising a windward side and a leeward side alternately arranged in sequence; through holes are arranged on the windward side and/or the leeward side.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: specifically, the windward side and the leeward side are alternately arranged in turn along the length direction of the corrugated sheet, and the windward side and the leeward side form an included angle, so that the intersection of the windward side and the leeward side is a wave crest or a wave trough. The windward side is a radiating surface for receiving the direct action of the airflow, and therefore, through the through holes formed in the windward side and the leeward side, the heat exchange performance of the corrugated sheet is improved under the drainage effect of the drainage structure, and the corrugated sheet has the advantage of strong airflow disturbance.

In one example of the utility model, the through holes are provided at the positions of the peaks and/or troughs of the windward side; and/or the through holes are arranged at the wave crest and/or the wave trough of the lee surface.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: further improving the heat exchange performance and the airflow disturbance capability of the corrugated plate.

In one example of the present utility model, a plurality of through holes are arranged in the transverse direction of the corrugated sheet; and/or a plurality of through holes are distributed along the longitudinal direction of the corrugated sheet; wherein, drainage structure and through-hole one-to-one set up.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: further improving the heat exchange performance and the airflow disturbance capability of the corrugated plate.

In one example of the utility model, the drainage structures are integrally formed with the corrugated sheets; and/or the drainage structure is a drainage flanging, one end of the drainage flanging is connected to the edge of the through hole, and the other end extends towards the direction away from the through hole.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: by integrally forming the drainage structure and the corrugated sheet, the production efficiency is improved.

In one example of the present utility model, along the corrugation direction of the corrugated sheet, the relationship between the length L1 of the corrugated sheet and the single wavelength L2 is: 2 xL 2 is less than or equal to L1 and less than or equal to 5 xL 2; and/or, the wave height H of the corrugated sheet is: h is more than or equal to 0.8mm and less than or equal to 1.1mm.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the heat exchange efficiency of the corrugated sheet is ensured.

In another aspect, the present utility model also provides an air conditioner, including: fins as provided in any of the examples above; the outdoor unit comprises a heat exchanger provided with a plurality of fins, and the fins are matched with heat exchange tubes of the heat exchanger to form a plurality of air channels; the drainage structure is used for guiding air flow passing through any one of the air channels to the other air channel arranged adjacent to the air channel through the through hole.

Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the technical effects corresponding to any one of the above technical schemes can be achieved, and will not be repeated here.

After the technical scheme of the utility model is adopted, the following technical effects can be achieved:

(1) Through setting up drainage structure in the position that corresponds the through-hole for play further drainage effect to the air current, increased the air current that gets into in another wind channel through the through-hole, further improved the air current interference ability of fin, and improved the heat transfer performance of fin.

Drawings

Fig. 1 is a schematic structural view of a corrugated fin of the prior art.

Fig. 2 is a schematic view of the fin from another view in fig. 1.

Fig. 3 is a schematic structural view of a first fin according to an embodiment of the present utility model.

Fig. 4 is a schematic view of a partial structure in fig. 3.

Fig. 5 is a schematic structural view of a second fin according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a third fin according to an embodiment of the present utility model.

Fig. 7 is a schematic structural view of a fourth fin according to an embodiment of the present utility model.

FIG. 8 is a schematic view of a fifth fin according to an embodiment of the present utility model

Reference numerals illustrate:

100-fins; 101-a first air duct; 102-a second air duct; 103-air inlet direction; 104-mounting holes; 10-radiating fins; 11-a first radiating surface; 12-a second radiating surface; 13-wave surface; 14-wave crest; 15-trough; 20-drainage structure; 21-a first drainage member; 22-a second drainage member; 30-through holes;

200-un-apertured fins.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

Referring to fig. 2, a schematic structure of a fin 100 according to an embodiment of the present utility model is shown. Referring to fig. 1-8, fin 100 includes, for example, a heat sink 10 and a drainage structure 20. One side of the radiating fin 10 is provided with a first radiating surface 11, and a through hole 30 is formed in the first radiating surface 11; the drainage structure 20 is connected to the first radiating surface 11 at a position corresponding to the through hole 30; the drainage structure 20 is used for guiding the air flow passing through the first heat dissipation surface 11 to the other side of the heat dissipation plate 10 away from the first heat dissipation surface 11 through the through hole 30.

In a specific example, the fin 100 provided in the present disclosure is applied to, for example, a heat exchanger of an air conditioner, and specifically, the fin 100 is provided with a mounting hole 104 matched with a heat exchange tube, and the fin 100 is matched with the heat exchange tube to increase the heat dissipation surface area of the heat exchange tube, so as to improve the heat exchange capability of the heat exchange tube. In combination with the air supply effect of the heat-dissipating fan of the heat exchanger on the fins 100, the air supply direction of the heat-dissipating fan on the fins 100 is set along the length direction of the fins 100, so that the air supply of the heat-dissipating fan can be fully contacted with the heat-dissipating surface of the fins 100.

Further, an air passage through which the air of the heat radiation fan is blown is formed between two adjacent fins 100 connected to the heat exchange tube. By providing the through holes 30 on the heat sink 10, the air flow entering the air duct can enter the other air duct adjacent to the air duct through the through holes 30, and for convenience of understanding, two adjacent air ducts can be defined into the first air duct 101 and the second air duct 102, and the air flow enters the first air duct 101 along the air inlet direction 103, and then under the drainage effect of the drainage structure 20, the air flow quantity guided to the second air duct 102 through the through holes 30 is increased. Thereby enhancing the air flow disturbance in the other air passage and thus enhancing the heat exchange performance of the fin 100. And in combination with the technical solution, the drainage structure 20 can perform a drainage function on the air flow, so that the air flow passing through the through holes 30 is increased, the air flow disturbance capacity of the fin 100 is further improved, and the heat exchange performance of the fin 100 is improved.

Preferably, a side of the drainage structure 20 close to the through hole 30 is a drainage surface; the included angle formed between the plane surrounded by the position where the first radiating surface 11 forms an opening and the drainage surface of the through hole 30 is a, and a is more than or equal to 30 degrees and less than or equal to 90 degrees. For example, a may take the form of an angle of 30 °, 45 °, 60 ° or 90 °.

Of course, the included angle a between the plurality of drainage structures 20 and the heat sink in the same fin 100 may be at least two of any of the above-mentioned angles of 30 °, 45 °, 60 ° and 90 °, respectively, which is not limited herein.

In a specific example, the installation position of the fin 100 on the heat exchange tube is adjusted so that the opening direction forming the above mentioned included angle is opposite to the airflow flowing direction, so that the airflow flows on the first heat dissipating surface 11 until the airflow enters the drainage space formed by sandwiching the drainage structure 20 and the heat dissipating fin 10, and under the drainage effect of the drainage structure 20, the airflow enters the other side of the heat dissipating fin 10 away from the first heat dissipating surface 11 through the through hole 30 located in the drainage space, thereby improving the airflow disturbance of the other side, and further improving the heat exchanging performance of the fin 100.

Further, because the included angle enclosed by the cooling fin 10 and the drainage structure 20 is an acute angle, the drainage capability of the drainage structure 20 for guiding the air flow into the through hole 30 can be fully improved, and under the condition that the two forms an obtuse angle, the drainage structure 20 can not fully guide the air flow contacted with the air flow into the through hole 30.

Preferably, the heat sink 10 is provided with a second heat radiating surface 12 disposed opposite to the first heat radiating surface 11, and the through holes 30 include a first through hole 30 and a second through hole 30; the drainage structure 20 comprises, for example, a first drainage member 21 and a second drainage member 22: the first drainage piece 21 is connected to the first radiating surface 11 at a position corresponding to the first through hole 30; the second drainage member 22 is connected to the second heat dissipating surface 12 at a position corresponding to the second through hole 30. Further improving the ability of the airflow to disrupt the airflow through the fin 10 and thereby improving the heat exchange capacity of the fin 100.

Preferably, the shape of the through hole 30 includes at least one of a circular arc hole, a square hole, or a rectangular hole. According to different actual use scenes and requirements of the fin 100, the adaptive opening shapes are correspondingly selected, so that the heat exchange quantity can be increased to a certain extent under the condition that the total heat exchange area of the fin 100 is kept unchanged or reduced.

For example, the shape of the through hole 30 may be a rectangular hole, and the drainage structure 20 is a rectangular plate adapted to the rectangular hole, and one end of the rectangular plate connected to the heat sink 10 is connected to a corresponding straight edge of the rectangular hole, so that the air flow is sufficiently drained into the rectangular hole under the drainage effect of the rectangular plate, so that the situation that the drained air flow passes through a fit gap formed by interconnecting the rectangular plate and the rectangular hole is effectively prevented, and the reduction of the air flow drained into the through hole 30 is avoided.

Preferably, the heat sink 10 is a corrugated sheet, and the corrugated sheet includes a windward side and a leeward side which are alternately arranged in sequence; through holes 30 are provided in the windward and/or leeward side.

Specifically, the windward side and the leeward side are alternately arranged in turn along the length direction of the corrugated sheet, and the windward side and the leeward side form an included angle, so that the intersection of the windward side and the leeward side is a crest 14 or a trough 15. The windward side is a heat dissipation surface for receiving the direct action of the air flow, and thus, through the through holes 30 arranged on both the windward side and the leeward side, the heat exchange performance of the corrugated sheet is improved under the drainage action of the drainage structure 20, so that the corrugated sheet has the advantage of strong air flow disturbance.

Preferably, the through holes 30 are arranged at the positions of the wave crests 14 and/or the wave troughs 15 of the windward side; and/or the through holes 30 are provided at the positions of the peaks 14 and/or the valleys 15 of the lee side. Further improving the heat exchange performance and the airflow disturbance capability of the corrugated plate.

Preferably, a plurality of through holes 30 are arranged in the transverse direction of the corrugated sheet; and/or a plurality of through holes 30 are arranged along the longitudinal direction of the corrugated sheet; wherein, drainage structures 20 and through-hole 30 one-to-one set up.

In one specific example, the transverse direction may be understood as being along the width direction of the corrugated sheet, while the longitudinal direction is along the length direction of the corrugated sheet. When the air current passes through the surface of the corrugated sheet, in order to enable the plurality of drainage structures 20 arranged on the same radiating surface of the corrugated sheet to reduce the drainage effect of the mutual influence on the air current, at least one drainage structure 20 and the rest plurality of drainage structures 20 are arranged at different positions of the corrugated sheet along the width direction in the plurality of drainage structures 20 which are sequentially arranged along the length direction, and then when the self-air current moves along the length direction of the corrugated sheet, the influence of the drainage structure 20 contacted with the air current on the drainage effect of the drainage structure 20 arranged at the rear of the self-air current is reduced.

Of course, a plurality of through holes 30 may be sequentially disposed along the width direction on the same windward side, and a plurality of drainage structures 20 corresponding to the plurality of through holes 30 are disposed in a one-to-one manner.

Furthermore, a plurality of through holes 30 may be sequentially provided along the length direction on the same windward side, and a plurality of drainage structures 20 in one-to-one fit with the plurality of through holes 30 may be provided correspondingly.

Alternatively, the two may be combined, that is, a plurality of through holes 30 may be sequentially provided in the width direction on the same windward side, and a plurality of through holes 30 may be sequentially provided along the length direction.

In addition, the arrangement of the through holes 30 on the leeward side may be the same as that on the windward side, and will not be described in detail here.

Preferably, the drainage structures 20 are integrally formed with the corrugated sheets; and/or, the drainage structure 20 is a drainage flanging, one end of the drainage flanging is connected to the edge of the through hole 30, and the other end extends towards a direction away from the through hole 30. The included angle formed between the drainage flange and the radiating surface of the corrugated sheet is a flange angle.

Preferably, along the corrugation direction of the corrugated sheet, the relationship between the length L1 of the corrugated sheet and the single wavelength L2 is: 2 xL 2 is less than or equal to L1 and less than or equal to 5 xL 2; and/or, the wave height H of the corrugated sheet is: h is more than or equal to 0.8mm and less than or equal to 1.1mm.

In one specific example, by controlling the windward speed to be kept at 2m/s, the aperture of the mounting hole 104 formed on the corrugated sheet is 7mm, and when the plurality of heat exchange tubes are fitted with the fin 100, the tube pitch between the plurality of heat exchange tubes is 22mm, and the tube pitch is 19.05mm; further, the wave height (wave height) of the corrugated sheet was 0.95mm, the length L1 of the corrugated sheet was 38.1mm, and the length L2 of the single wavelength was 9.525mm.

In connection with fig. 3, when the fin 100 is made as the structure of example 1, it is preferable that a is 90 °, the through hole 30 is a rectangular hole, and the size thereof is 2.00mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 2.00mm×1.0mm.

In connection with fig. 5, when the fin 100 is taken as the structure of example 2, it is preferable that a is 30 °, the through hole 30 is a rectangular hole, and the size thereof is 2.00mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 2.00mm×1.0mm.

In connection with fig. 8, when the fin 100 is taken as the structure of example 3, it is preferable that a is 30 °, the through hole 30 is a rectangular hole, and the size thereof is 3.5mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 3.50mm×1.0mm.

The following table 1 is combined to obtain the numerical simulation results of the corrugated sheet under the condition of equal wind quantity at different flanging angles and opening lengths.

TABLE 1

Thus, it can be seen from Table 1 that the fins 100 having the through holes 30 formed therein can bring about a maximum improvement in heat exchange amount of 9% while maintaining the same head-on wind speed of the heat exchanger. The flanging angle was 30℃and the length of the opening was 3.5 mm. Times.1.0 mm. Meanwhile, through the data of example 1 and example 2, we found that when the opening lengths were the same, the cuff angle was 90 ° and the pressure drop was increased by 4% over that caused by the cuff angle of 30 °. W/P is the ratio of heat exchange amount to pressure drop, and the comprehensive heat exchange performance of the fin 100 is evaluated, wherein the larger the numerical value is, the better the comprehensive heat exchange capability of the fin 100 is. From the data in table 1, the choice of the hole opening scheme with smaller flanging angle is better when the hole opening length is larger as shown in the data in examples 2 and 3. In summary, the fins 100 of example 3 are optimal in the overall heat exchange capacity of each fin 100 of table 1.

In connection with fig. 3, when the fin 100 is made as the structure of example 4, it is preferable that a is 90 °, the through hole 30 is a rectangular hole, and the size thereof is 2.00mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 2.00mm×1.0mm. And the drainage structure 20 is only arranged on the corrugated sheet on one side.

In connection with fig. 6, when the fin 100 is made as the structure of example 5, it is preferable that a is 90 °, the through hole 30 is a rectangular hole, and the size thereof is 2.00mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 2.00mm×1.0mm. The drainage structures 20 are disposed along two sides of the corrugated sheet, that is, the plurality of drainage structures 20 are disposed on the first heat dissipation surface 11 and the second heat dissipation surface 12 respectively.

The following table 2 is incorporated to derive the flow and heat transfer numerical simulation results of the flow-inducing structure 20 in the connection of the corrugated sheets with one or both sides, respectively.

TABLE 2

Fin form	Face wind speed (m/s)	Heat exchange capacity (W)	Pressure drop (Pa)	W/P
					Non-perforated fin	2	1.46	27.7	0.053
Example 4	2	1.69	30	0.056
					Example 5	2	1.71	32.1	0.053

It can be seen from table 2 that the turn-up direction alternate pressure drop is increased by 7% over the un-perforated fins 200, increasing air side flow resistance, but the heat transfer rate increase is almost the same as that of fins 100 with turn-up direction only upwards; by the ratio (W/P) of heat exchange amount to pressure drop, the flanging direction is consistent, the comprehensive performance is better, that is, the comprehensive heat exchange capacity of example 4 is better than that of example 5, and in table 2, the comprehensive heat exchange performance of example 4 is optimal.

In connection with fig. 8, when the fin 100 is made as the structure of example 6, it is preferable that a is 30 °, the through hole 30 is a rectangular hole, and the size thereof is 3.50mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 3.50mm×1.0mm. And the drainage structure 20 is only arranged at the middle position of the corrugated surface of the corrugated sheet at one side.

In connection with fig. 7, when the fin 100 is made as the structure of example 7, it is preferable that a is 30 °, the through hole 30 is a rectangular hole, and the size thereof is 3.50mm×1.0mm, and correspondingly, the size of the drainage structure 20 is adapted to the size of the rectangular hole, and is also 3.50mm×1.0mm. And the drainage structures 20 are arranged at the positions of the wave crests 14 and the wave troughs 15 of the corrugated sheet only on one side.

And (3) combining the contents of the following table 3 to obtain data simulation results of different positions of the through holes 30 of the perforated fin 100 under the working condition of equal air quantity.

TABLE 3 Table 3

Fin form	Face wind speed (m/s)	Heat exchange capacity (W)	Pressure drop (Pa)	W/P
					Non-perforated fin	2	1.46	27.7	0.053
Example 6	2	1.6	28.1	0.057
					Example 7	2	1.74	28.8	0.06

Thus, as can be seen from the above Table 3, the through holes 30 are arranged near the corners of the corrugation, i.e., the through holes 30 are arranged at the positions of the crests 14 and the troughs 15, and the integrated heat exchanging capacity thereof is superior to that of the through holes 30 arranged at the positions of the wavy surfaces 13 of the fins 100. Thus, in table 3, the integrated heat exchange capacity of example 7 is optimal.

On the other hand, the embodiment of the utility model also provides an air conditioner. Specifically, the air conditioner includes, for example, an outdoor unit and the fins 100 as in the above-described embodiments. The outdoor unit comprises a heat exchanger provided with a plurality of fins 100, and the fins 100 are matched with heat exchange tubes of the heat exchanger to form a plurality of air channels; wherein the drainage structure 20 is used for guiding the air flow passing through any one of the air channels to another air channel arranged adjacent to the air channel through the through hole 30. Specifically, the technical effects corresponding to any technical scheme in the foregoing embodiments can be achieved in this embodiment, which is not described herein.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims (10)

1. A fin, comprising:

a radiating fin (10), wherein one side of the radiating fin (10) is a first radiating surface (11), and a through hole (30) is formed in the first radiating surface (11);

the drainage structure (20) is connected to the position, corresponding to the through hole (30), of the first radiating surface (11);

the drainage structure (20) is used for guiding the air flow passing through the first radiating surface (11) to the other side, far away from the first radiating surface (11), of the radiating fin (10) through the through hole (30).

2. The fin according to claim 1, wherein the fin is formed of a metal material,

one side of the drainage structure (20) close to the through hole (30) is a drainage surface;

an included angle a formed between a plane surrounded by the position of the opening formed by the first radiating surface (11) and the drainage surface is 30 degrees or more and a is or less than 90 degrees.

3. The fin according to claim 1, wherein the heat sink (10) is provided with a second heat radiating surface (12) disposed opposite to the first heat radiating surface (11), and the through hole (30) includes a first through hole (30) and a second through hole (30); the drainage structure (20) comprises:

the first drainage piece (21), the first drainage piece (21) is connected to the position of the first radiating surface (11) corresponding to the first through hole (30);

and the second drainage piece (22) is connected to the position, corresponding to the second through hole (30), of the second radiating surface (12).

4. The fin according to claim 1, wherein the fin is formed of a metal material,

the shape of the through hole (30) comprises at least one of a circular arc hole, a square hole or a rectangular hole.

5. The fin according to any one of claim 1 to 4,

the radiating fins (10) are corrugated fins, and the corrugated fins comprise windward surfaces and leeward surfaces which are alternately arranged in sequence;

the through holes (30) are arranged on the windward side and/or the leeward side.

6. The fin according to claim 5, wherein,

the through holes (30) are arranged at the positions of the wave crests (14) and/or the wave troughs (15) of the windward side;

and/or the through holes (30) are arranged at the positions of the wave crests (14) and/or the wave troughs (15) of the leeward side.

7. The fin according to claim 5, wherein,

a plurality of through holes (30) are distributed along the transverse direction of the corrugated sheet;

and/or a plurality of through holes (30) are arranged along the longitudinal direction of the corrugated sheet;

wherein the drainage structures (20) are arranged in one-to-one correspondence with the through holes (30).

8. The fin according to claim 5, wherein,

the drainage structure (20) and the corrugated sheet are integrally formed;

and/or, the drainage structure (20) is a drainage flanging, one end of the drainage flanging is connected to the edge of the through hole (30), and the other end extends towards a direction away from the through hole (30).

9. The fin according to claim 5, wherein,

along the corrugation direction of the corrugated sheet, the relationship between the length L1 of the corrugated sheet and the single wavelength L2 is: 2 xL 2 is less than or equal to L1 and less than or equal to 5 xL 2;

and/or, the wave height H of the corrugated sheet is: h is more than or equal to 0.8mm and less than or equal to 1.1mm.

10. An air conditioner, comprising:

the fin according to any one of claims 1 to 9;

the outdoor unit comprises a heat exchanger provided with a plurality of fins, and the fins are matched with heat exchange tubes of the heat exchanger to form a plurality of air channels;

the drainage structure (20) is used for guiding the air flow passing through any one of the air channels to another air channel arranged adjacent to the air channel through the through hole (30).