An open-cell fin and an air conditioner

Abstract

The present invention provides an open-cell fin and an air conditioner. The open-cell fin is a corrugated sheet, and the corrugated sheet includes a corrugated surface and through holes. The corrugated surface includes a windward surface and a leeward surface, and the windward surface and the leeward surface are connected in sequence. A crease is formed at the connection of the windward surface and the leeward surface. The corrugated surface at the connection of the corrugated sheet and the heat exchange tube is denoted as the surface with a shorter wavelength. The through holes include hollowed-out holes, and the hollowed-out holes are arranged at the crease or the surface with a shorter wavelength, which is used to improve the heat exchange efficiency. By appropriately opening holes on the fin surface according to the present invention, the harm caused by frost layer accumulation is reduced, the heat exchange capacity is improved, the heat transfer coefficient on the air side is increased, and the air resistance at the hole-opening position is reduced. Even when the total heat exchange area is reduced, a certain degree of increase in the heat exchange amount can still be ensured.

Description

Technical Field

[0001] The present invention relates to the field of air conditioners, and in particular, to a perforated fin and an air conditioner. Background Art

[0002] Currently, in household air conditioners, the heat exchanger is one of the important working components. The heat exchanger includes a condenser and an evaporator. The overall heat exchanger not only occupies most of the volume of the entire air conditioning system, but also directly affects the performance and cost of the entire system. Improving the thermal performance of the heat exchanger is of great significance for improving the energy efficiency ratio of the air conditioner. Among them, setting fins on the heat exchanger can effectively conduct heat exchange and play a good role in heat dissipation. In the patent CN207573819U, the concept of the heat dissipation fins of the heat dissipation device being in a corrugated sheet structure and having through holes on the heat dissipation fins is proposed. However, the position setting of the through holes is relatively single, the number is large, the arrangement method of the through holes is relatively dense, which is easy to cause frost layer accumulation, affect heat exchange, and the opening area is too large. In the patent CN206247932U, it involves fin slits, and the windward area and the leeward area of the corrugated slotted fins are symmetrically arranged. The first strip-shaped hollow slit and the second strip-shaped hollow slit are parallelograms and staggered on the surface of each area. Considering the differences between the windward area and the leeward area of the corrugated fins, slits are provided in both the windward area and the leeward area, which improves the heat transfer coefficient to a certain extent, but the frost layer is still easy to accumulate, increasing the resistance at the slits. Summary of the Invention

[0003] In view of this, the present invention aims to provide a perforated fin and an air conditioner to solve the problems in the prior art that the position setting of the openings is easy to cause frost layer accumulation, increase the resistance at the slits, thus blocking the openings, as well as the influence of the size of the opening area on the heat transfer coefficient, resulting in general heat dissipation effect. Thereby, it is possible to reduce the harm caused by frost layer accumulation, improve the heat exchange capacity, increase the heat transfer coefficient on the air side, and ensure a certain increase in the heat transfer amount even when the total heat exchange area is reduced, enhancing the heat dissipation effect.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A perforated fin according to the present invention, the perforated fin is a corrugated sheet, the corrugated sheet includes a corrugated surface and through holes, the corrugated surface includes a windward surface and a leeward surface, the windward surface and the leeward surface are connected in sequence, a crease is formed at the connection of the windward surface and the leeward surface, the corrugated surface at the connection of the corrugated sheet and the heat exchange tube is denoted as the surface with a shorter wavelength, the through holes include hollow holes, and the hollow holes are arranged on the crease or the surface with a shorter wavelength, which is used to improve the heat exchange efficiency. The opening setting of the fin, compared with the corrugated fin in the prior art, effectively reduces the harm caused by frost layer accumulation, improves the heat exchange capacity, increases the heat transfer coefficient on the air side, reduces the air resistance at the openings, and can ensure a certain increase in the heat transfer amount even when the total heat exchange area is reduced.

[0006] Furthermore, the through holes are heat exchange tube holes, which are arranged on the shorter wavelength side. The centers of the heat exchange tube holes coincide with the sides of the corrugated sheet and are used to install heat exchange tubes. Along the extension direction of the crease, the hollow holes are arranged on the crease in a linear array. The shapes of the hollow holes include at least one of round holes, semi-circular holes, square holes, and rectangular holes. Different shapes of the hollow holes have different effects on the heat transfer amount of the corrugated sheet. The setting of corrugated sheets with multiple shapes is conducive to comparing and analyzing the influence of the opening shape on the heat transfer coefficient of the air side of the corrugated sheet, and then gradually optimizing. In different situations, selecting a suitable opening shape is beneficial to saving materials. Even when the total heat exchange area is reduced, it can still ensure a certain increase in the heat exchange amount.

[0007] Furthermore, the hollow hole is a round hole with a diameter of 1 mm, and the center of the round hole coincides with the crease. Or the hollow hole is a semi-circular hole with a diameter of 1 mm, and the center of the semi-circular hole coincides with the crease. The semi-circular hole is arranged on the right side of the crease. Or the hollow hole is a square hole with a length of 1 mm and a width of 0.8 mm. One long side of the square hole coincides with the crease, and the other long side of the square hole is arranged on the corrugated surface on the right side of the crease. Or the hollow hole is a rectangular hole with a length of 1 mm and a width of 0.4 mm. One long side of the rectangular hole coincides with the crease, and the other long side of the rectangular hole is arranged on the corrugated surface on the right side of the crease. The hollow holes are arranged on the crease, which is conducive to reducing the frost layer accumulation. The hollow holes are respectively arranged on the leeward surface or on the side of the windward surface close to the leeward surface at the crease, which is conducive to reducing the influence of air resistance on the hollow holes, increasing the heat exchange amount of the corrugated sheet, improving the heat transfer coefficient of the air side, alleviating the loss of the corrugated sheet caused by excessive pressure, and prolonging the service life of the corrugated sheet.

[0008] Furthermore, the hollow holes are arranged on the shorter wavelength side. The hollow hole is a square hole, and the long side of the hollow hole is parallel or coincides with the crease. The square hole has a length of 1 mm and a width of 0.8 mm. Or the hollow hole is a round hole, and the single opening area of the round hole is 0.88 mm 2 or 3.53 mm 2 The center of the round hole coincides with the crease. The hollow holes are arranged on the shorter wavelength side, which is conducive to increasing the heat exchange amount of the corrugated sheet. The windward surface of the corrugated fin is prone to frost layer accumulation, while the shorter wavelength side is not easy to form frost layer accumulation, thus effectively reducing the air resistance of the corrugated sheet and increasing the heat exchange amount of the corrugated sheet. Different shapes and sizes of the hollow holes are conducive to alleviating the influence of frost layer accumulation to different degrees, reducing the total area of the corrugated sheet, and better improving the heat dissipation capacity.

[0009] Furthermore, an air conditioner includes the fin with openings described above.

[0010] Compared with the prior art, the perforated fin and air conditioner of the present invention have the following beneficial effects: By appropriately perforating the fin surface, the harm caused by frost layer accumulation is reduced, the heat transfer capacity is improved, the heat transfer coefficient on the air side is increased, and the air resistance at the perforation is reduced. Even when the total heat transfer area is reduced, it is still possible to ensure a certain increase in the heat transfer amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0012] Figure 1 is a schematic diagram of a corrugated fin of the prior art;

[0013] Figure 2 is a schematic diagram of a round-hole fin;

[0014] Figure 3 is a schematic diagram of a semi-circular hole fin;

[0015] Figure 4 is a schematic diagram of a square-hole fin;

[0016] Figure 5 is a schematic diagram of a rectangular-hole fin;

[0017] Figure 6 is a schematic diagram of a short-wavelength fin with 4 square holes opened in the middle;

[0018] Figure 7 is a schematic diagram of 4 square holes opened parallel to the corrugation creases on the short-wavelength surface;

[0019] Figure 8 is a schematic diagram of 4 square holes opened near the circular tube on the corrugation creases of the short-wavelength surface;

[0020] Figure 9 is a schematic diagram of 8 square holes opened parallel to the corrugation creases on the short-wavelength surface;

[0021] Figure 10 is a schematic diagram of 8 square holes opened by superimposing the corrugation creases and the corrugated surface on the short-wavelength surface.

[0022] Description of the reference numerals: 1, corrugated sheet; 2, windward surface; 21, first windward surface; 22, second windward surface; 23, third windward surface; 3, leeward surface; 31, first leeward surface; 32, second leeward surface; 33, third leeward surface; 4, crease; 41, first crease; 42, second crease; 43, third crease; 44, fourth crease; 45, fifth crease; 46, sixth crease; 47, seventh crease; 48, eighth crease; 49, ninth crease; 5, heat exchange tube hole; 51, first round tube hole; 52, second round tube hole; 6, side; 61, first side; 62, second side; 7, hollow hole; 8, short wavelength surface; 81, first short wave surface; 82, second short wave surface; 9, long wavelength surface. Detailed implementation manners

[0023] The inventive concepts of the present disclosure will be described below using terms that are commonly used by those skilled in the art to convey the substance of their work to other artisans in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0024] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0026] This embodiment is directed to an open-hole fin and an air conditioner. Similar to the heat exchanger fins in a conventional air conditioner, the overall structure is composed of heat exchange tube mounting holes and corrugated fins.

[0027] In the prior art, compared with the open-hole fin condenser in the heat exchanger, the comprehensive performance of the non-open-hole fin condenser is relatively weak, and the setting of the open-hole position on the windward surface 2 is likely to cause frost layer accumulation, increase the resistance at the open-hole, and thus cause the problem of blocking the open-hole. In addition, whether the open-hole area is too small or too large, it also affects the heat transfer coefficient and makes the heat dissipation effect average.

[0028] To solve the problems in the prior art, this embodiment proposes an open-hole fin and an air conditioner, as Figure 1-10As shown, the perforated fin is obtained by perforating the surface or crease 4 of the unperforated corrugated fin in the prior art. The corrugated fin in the prior art is a flat 7-mm corrugated fin. The perforated fin is a corrugated sheet 1, which includes a corrugated surface and through holes. The corrugated surface includes a windward surface 2 and a leeward surface 3. The windward surface 2 and the leeward surface 3 are connected in sequence and cyclically. The windward surface 2 and the leeward surface 3 are integrally formed, and a crease 4 is formed at the connection of the windward surface 2 and the leeward surface 3. The corrugated surface at the connection of the corrugated sheet 1 and the heat exchange tube is denoted as the shorter-wavelength surface 8, and the other corrugated surfaces of the corrugated sheet 1 except the shorter-wavelength surface 8 are denoted as the longer-wavelength surface 9. The through holes include hollow holes 7, and the hollow holes 7 are arranged at the crease 4 or the shorter-wavelength surface 8 to improve the heat exchange efficiency.

[0029] The through hole is a heat exchange tube hole 5, and the heat exchange tube hole 5 is arranged at the shorter-wavelength surface 8. The center of the circle of the heat exchange tube hole 5 coincides with the side 6 of the corrugated sheet 1 and is used for installing the heat exchange tube in the heat exchanger.

[0030] Perforating the flat corrugated fin is beneficial to improving the comprehensive performance of the heat exchanger. The hollow holes 7 are arranged at the crease 4 or the shorter-wavelength surface 8, which is beneficial to reducing the harm caused by frost layer accumulation, reducing the resistance at the perforated part, preventing the perforation from being blocked, increasing the heat transfer coefficient, and enhancing the heat dissipation capacity.

[0031] The 7-mm corrugated fin selects the flow area between two rows of tubes of the heat exchanger as the simulation area to measure and compare the calculated values. Among them, the tube pitch of the heat exchange tube is 22 mm, the tube row pitch of the heat exchange tube is 19.05 mm, the diameter of the heat exchange tube is 7 mm, the fin pitch is 2 mm, the corrugation height of the corrugated sheet 1 is 0.95 mm, the longer-wavelength surface 9 is 5.975 mm, and the shorter-wavelength surface 8 is 3.55 mm. In this embodiment, the wavelength refers to the distance between the highest points of two adjacent corrugated surfaces. The longer-wavelength surface 9 and the shorter-wavelength surface 8 are self-created words, which are only used to define the corrugated fin from the perspective of wavelength, and the longer and shorter are relative.

[0032] The corrugation of the perforated fin is in a combined form, with the longer-wavelength surface 9 and the shorter-wavelength surface 8 arranged alternately, which is beneficial to increasing the heat transfer amount of the shorter-wavelength surface 8. At the same time, it reduces the resistance at the perforated part and increases the heat transfer coefficient.

[0033] Preferably, the corrugated sheet 1 is successively connected by the windward side 2 and the leeward side 3. The side edge 6 is a side perpendicular to the crease 4 of the corrugated sheet 1. The crease 4 includes a first crease 41, a second crease 42, a third crease 43, a fourth crease 44, a fifth crease 45, a sixth crease 46, a seventh crease 47, an eighth crease 48, and a ninth crease 49. The windward side 2 includes a first windward side 21, and the leeward side 3 includes a third leeward side 33. The eighth crease 48 is connected to the first windward side 21, and the ninth crease 49 is connected to the third leeward side 33. In this embodiment, the right side refers to the direction from the eighth crease 48 to the ninth crease 49, and the left side is the opposite direction of the right side.

[0034] The shorter wavelength surface 8 includes a first shorter wavelength surface 81 and a second shorter wavelength surface 82. The first shorter wavelength surface 81 is connected to the second shorter wavelength surface 82 through the longer wavelength surface 9. The first shorter wavelength surface 81 includes a first crease 41, a first leeward side 31, a second crease 42, a second windward side 22, and a third crease 43. The second shorter wavelength surface 82 includes a fifth crease 45, a second leeward side 32, a sixth crease 46, a third windward side 23, and a seventh crease 47. The heat exchange tube holes 5 include a first round tube hole 51 and a second round tube hole 52. The side edge 6 includes a first side edge 61 and a second side edge 62. The first round tube hole 51 is arranged on the first shorter wavelength surface 81, and the center of the first round tube hole 51 is arranged on the first side edge 61. The second round tube hole 52 is arranged on the second shorter wavelength surface 82, and the center of the second round tube hole 52 is arranged on the second side edge 62.

[0035] Embodiment 1

[0036] As Figure 2-5 shown, the hollow holes 7 are arranged in a linear array on the crease 4. The shape of the hollow holes 7 includes one of a round hole, a semi-circular hole, a square hole, a rectangular hole, etc. According to the change in the length of the crease 4, the number of the hollow holes 7 arranged on the crease 4 changes accordingly.

[0037] The hollow holes 7 are arranged in a linear array on the crease 4, which is beneficial to reducing the frost layer accumulation and avoiding the blockage of the hollow holes 7 caused by too dense holes, thereby reducing the heat transfer coefficient.

[0038] Five hollow holes 7 are arranged in a linear array on the fourth crease 44, the eighth crease 48, and the ninth crease 49. Four hollow holes 7 are arranged in a linear array on the first crease 41, the third crease 43, the fifth crease 45, and the seventh crease 47. Three hollow holes 7 are arranged in a linear array on the second crease 42 and the sixth crease 46. The number of the hollow holes 7 arranged on the crease 4 pointed out in this embodiment is only used to explain the scheme experimented in this embodiment, but is not limited to the given number of the hollow holes 7. The specific situation is set according to the size of the fin.

[0039] The hollow holes 7 of the perforated fins are arranged at the creases 4, which helps to reduce the air resistance at the perforated areas of the corrugated fins, improve the heat transfer coefficient, and increase the heat transfer amount.

[0040] Example 1: The hollow hole 7 is a round hole. As Figure 2 shown, the diameter of the round hole is 1 mm, the center of the round hole coincides with the crease 4, and the round hole is provided on both the windward side 2 and the leeward side 3. At this time, the area of the perforated fin is 6.6% less than the area of the corrugated fin in the prior art.

[0041] Example 2: The hollow hole 7 is a semi-circular hole. As Figure 3 shown, the diameter of the semi-circular hole is 1 mm, the center of the semi-circle coincides with the crease 4, and the semi-circle is arranged on the right side of the crease 4. At this time, the area of the perforated fin is 3.3% less than the area of the corrugated fin in the prior art.

[0042] Example 3: The hollow hole 7 is a square hole. As Figure 4 shown, the length of the square hole is 1 mm and the width is 0.8 mm. One long side of the square hole coincides with the crease 4, and the other long side of the square hole is arranged on the corrugated surface on the right side of the crease 4. At this time, the area of the perforated fin is 6.7% less than the area of the corrugated fin in the prior art.

[0043] Example 4: The hollow hole 7 is a rectangular hole. As Figure 5 shown, the length of the rectangular hole is 1 mm and the width is 0.4 mm. One long side of the rectangular hole coincides with the crease 4, and the other long side of the rectangular hole is arranged on the corrugated surface on the right side of the crease 4. At this time, the area of the perforated fin is 3.4% less than the area of the corrugated fin in the prior art.

[0044] The hollow holes 7 are arranged on the right side of the crease 4. Except that the hollow hole 7 is a round hole, the hollow holes 7 of other shapes are all on the leeward side 3 or the left side of the windward side 2. The left side of the windward side 2 is connected to the leeward side 3, and the corrugated fin has a certain height. Overall, it can reduce the influence of air resistance on the opening, and at the same time reduce the possibility of frost layer accumulation. The setting of the round hole for the hollow hole 7 forms a contrast with the settings of other several shapes, which is conducive to observing the influence of the hollow holes 7 of different shapes on the heat transfer amount.

[0045] Select the perforated fins in this embodiment and the corrugated fins in the prior art to conduct a simulation experiment comparison of the heat transfer performance: Under the condition that the oncoming wind speed is 2.0 m / s, through the simulation calculation of the heat transfer amount, pressure drop, heat transfer coefficient, j / f 1 / 3 、the percentage increase in heat transfer amount and the percentage increase in heat transfer coefficient, the comparison results of the heat transfer performance of the two are shown in Table 1. Among them, the holes on the fin surface increase the flow resistance on the air side, and j / f 1 / 3The comprehensive performance of heat transfer and pressure drop is represented by a coefficient. It can be seen that the comprehensive performance of the perforated corrugated fin heat exchanger is slightly higher than that of the unperforated corrugated fin heat exchanger. After the corrugated fins are perforated, when the reduction in fin area is basically the same, the increase in heat transfer amount and heat transfer coefficient of the square-hole fins is higher than that of the round-hole fins, and the increase in heat transfer amount and heat transfer coefficient of the rectangular-hole fins is higher than that of the semi-circular-hole fins. Therefore, it can be concluded that under the premise of reducing the same heat transfer area, the square-hole opening method is better than the round-hole opening method.

[0046] Table 1

[0047]

[0048] Example 2

[0049] As Figure 6-10 shown, the hollow hole 7 is arranged on the shorter-wavelength surface 8. The hollow hole 7 is a square hole or a round hole. When the hollow hole 7 is a square hole, the long side of the hollow hole 7 is parallel to or coincides with the crease 4. The length of the square hole is 1 mm and the width is 0.8 mm. According to the change in the position and the number of the hollow holes 7 on the shorter-wavelength surface 8, the influence on the heat transfer coefficient is simulated and compared.

[0050] Arranging the hollow hole 7 on the shorter-wavelength surface 8 is beneficial to reducing the air resistance at the opening, reducing the pressure on the opening brought by the heat exchange gas, prolonging the service life of the perforated fins, increasing the heat transfer amount, and improving the heat exchange coefficient.

[0051] Example 5, the hollow hole 7 is arranged in a single row at the middle position of the shorter-wavelength surface 8. As Figure 6 shown, the hollow hole 7 is a square hole, and 4 hollow holes 7 are arranged, which are respectively located at the middle positions of the first leeward surface 31, the second windward surface 22, the second leeward surface 32, and the third windward surface 23.

[0052] Example 6, the hollow holes 7 are arranged in parallel at the corrugation creases 4 of the shorter-wavelength surface 8. As Figure 7 shown, the hollow hole 7 is a square hole, and 4 hollow holes 7 are arranged, which are respectively located at the middle positions of the first crease 41, the second crease 42, the fifth crease 45, and the sixth crease 46.

[0053] Example 7, with the same position and number of the hollow holes 7 as in Example 6. In this example, the hollow hole 7 is a round hole, and the single opening area is 0.88 mm 2 , and the center of the round hole coincides with the crease 4.

[0054] Example 8, with the same position and number of the hollow holes 7 as in Example 6. In this example, the hollow hole 7 is a round hole, and the single opening area is 3.53 mm 2 , and the center of the round hole coincides with the crease 4.

[0055] Example 9, the hollow holes 7 are arranged at the corrugated creases 4 of the shorter wavelength surface 8 close to the circular tube, as Figure 8 shown. The hollow holes 7 are square holes, and there are 4 hollow holes 7, which are respectively located at the positions of the first crease 41, the second crease 42, the fifth crease 45 and the sixth crease 46 close to the heat exchange tube hole 5, and the hollow holes 7 on the first crease 41 and the hollow holes 7 on the second crease 42 are arranged staggeredly.

[0056] Example 10, the hollow holes 7 are arranged in two parallel rows at the corrugated creases 4 of the shorter wavelength surface 8, as Figure 9 shown. The hollow holes 7 are square holes, and there are 8 hollow holes 7, which are respectively located at the positions of the first crease 41, the second crease 42, the fifth crease 45 and the sixth crease 46 far from the heat exchange tube hole 5.

[0057] Example 11, the hollow holes 7 are arranged in a stacked manner on the shorter wavelength surface 8, as Figure 10 shown. There are 8 hollow holes 7, the hollow holes 7 are square holes, and the hollow holes 7 are respectively located at the middle positions of the first crease 41, the second crease 42, the fifth crease 45 and the sixth crease 46 and the positions of the first leeward surface 31, the second windward surface 22, the second leeward surface 32 and the third windward surface 23 far from the heat exchange tube hole 5.

[0058] The differences in the positions and quantities of the hollow holes 7 arranged on the shorter wavelength surface 8 can effectively compare and analyze the influence of different positions on the heat exchange quantity, so as to determine the perforated fins with excellent heat exchange performance and improve the working efficiency of the air conditioner heat exchanger.

[0059] Select the perforated fins in this embodiment and the corrugated fins in the prior art for heat exchange performance simulation experiment comparison: when the face velocity is 2.0 m / s, through the simulation calculation of the heat exchange quantity, pressure drop, heat transfer coefficient, j / f 1 / 3 , the percentage increase in heat exchange quantity and the percentage increase in heat transfer coefficient, the comparison results of the heat exchange performance of the two are shown in Table 2. Among them, the holes on the fin surface increase the flow resistance on the air side, and the j / f 1 / 3 coefficient is used to represent the comprehensive performance of heat transfer and pressure drop.

[0060] It can be seen from Table 2 that: as shown in Examples 6 and 7, it can be seen that the heat exchange quantity of the square hole is higher than that of the round hole, and it can also be seen that the hole opening method of the square hole is superior to that of the round hole. As shown in Examples 7 and 8, the larger the opening area, the greater the heat transfer coefficient and flow resistance, and the smaller the heat exchange quantity. The data of multiple independent repeated tests show that there is an optimal value for the opening area (that is, the square hole is 1 mm - 2 mm long, 0.4 mm - 1.2 mm wide, and the length-width ratio is between 1.5 - 3.5), which can make the heat exchange quantity reach the maximum.

[0061] In addition, as shown in Examples 6 and 10, the more holes there are, the higher the production process requirements, the lower the fin strength, the higher the heat transfer coefficient, but the lower the heat exchange rate. Taking the heat exchange capacity and strength into consideration, the optimal number of holes should be 4-8. Since the heat exchange copper tubes inserted through the perforated fins have a disturbing effect on the air, the heat exchange rate at the heat exchange copper tubes is higher than that at other places on the fins. Therefore, the hole position can be set away from the heat exchange tube hole 5, that is, the ratio of the midpoint of the hole to the top and bottom of the fin is greater than 1.1, so as to expand the disturbance area as much as possible, thereby improving the heat exchange capacity of the fin.

[0062] In addition, as shown in Examples 5 and 6, opening holes near fold 4 causes stronger air disturbance, higher heat exchange, and a reduced heat transfer coefficient. Therefore, when the number of holes is small (4 holes), the holes are opened at fold 4 as much as possible. When the number of holes is large (8 holes), if only holes are opened at fold 4, the fin strength is low. At this time, as shown in Example 11, the holes can be arranged in a superimposed manner, and the disturbance at the superimposed holes is enhanced, which enhances the disturbance and ensures the fin strength.

[0063] Table 2

[0064]

[0065]

[0066] In the present invention, any air conditioner may include the fins described in this embodiment, and based on the relevant structure and assembly relationship of the corrugated fins provided in this embodiment, the air conditioner also includes conventional components including structures such as a motor and an air conditioner casing. Since it is a prior art, it will not be described in detail here.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An open-cell fin, characterized in that, The perforated fin is a corrugated fin (1). The corrugated fin (1) includes a corrugated surface and a through hole. The corrugated surface includes a windward surface (2) and a leeward surface (3). The windward surface (2) and the leeward surface (3) are connected in sequence. A crease (4) is formed at the connection of the windward surface (2) and the leeward surface (3). The corrugated surface at the connection of the corrugated fin (1) and the heat exchange tube is denoted as the shorter wavelength surface (8). The through hole includes a hollowed-out hole (7). The hollowed-out hole (7) is provided on the crease (4) for improving the heat exchange efficiency. Among them, the through hole includes a heat exchange tube hole (5). The heat exchange tube hole (5) is provided on the shorter wavelength surface (8). The center of the circle of the heat exchange tube hole (5) coincides with the side edge (6) of the corrugated fin (1) for installing the heat exchange tube. Along the extension direction of the crease (4), the hollowed-out holes (7) are arranged in a linear array on the crease (4). The shape of the hollowed-out holes (7) includes at least one of a round hole, a semi-circular hole, and a rectangular hole.

2. The perforated fin according to claim 1, wherein The hollowed-out hole (7) is a round hole. The diameter of the round hole is 1 mm. The center of the circle of the round hole coincides with the crease (4).

3. An open-cell fin according to claim 1, wherein, The hollowed-out hole (7) is a semi-circular hole. The diameter of the semi-circular hole is 1 mm. The center of the circle of the semi-circular hole coincides with the crease (4). The semi-circular hole is provided on the right side of the crease (4).

4. The fin with openings according to claim 1, characterized in that, The hollowed-out hole (7) is a rectangular hole. The length of the rectangular hole is 1 mm and the width is 0.8 mm. One long side of the rectangular hole coincides with the crease (4). The other long side of the rectangular hole is provided on the corrugated surface on the right side of the crease (4).

5. The perforated fin according to claim 1, characterized in that, The hollowed-out hole (7) is a rectangular hole. The length of the rectangular hole is 1 mm and the width is 0.4 mm. One long side of the rectangular hole coincides with the crease (4). The other long side of the rectangular hole is provided on the corrugated surface on the right side of the crease (4).

6. An air conditioner, characterized in that, The air conditioner includes the perforated fin according to any one of claims 1-5.

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