Heat exchangers and air conditioning units

Abstract

To provide a heat exchanger advantageous for improving heat exchange performance. [Solution] A heat exchanger 100 includes a fin 11 including a plurality of first holes, the first holes penetrating the fin along the thickness direction z1 of the fin, and the plurality of first holes spaced apart along the length direction y1 of the fin, and a heat exchange tube 12 penetrating the first holes and connected to the fin, the heat exchange tube is a plurality of heat exchange tubes spaced apart along the length direction of the fin, a plane perpendicular to the thickness direction of the fin is defined as a first plane, and a projection line of the heat exchange tube in the width direction on the first plane and a projection line of the fin in the length direction have an included angle of 20 degrees or more and 60 degrees or less. The heat exchanger can better adapt to changes in air flow, which is advantageous for improving the heat exchange performance of the heat exchanger.

Description

[Technical field]

[0001] The present invention relates to the field of heat exchange technology, in particular to a heat exchanger and an air conditioning unit. [Background technology]

[0002] In the related art, the heat exchanger must be arranged at an angle due to the narrow space in order to lower the height of the air duct and reduce the overall height when applied. However, when the heat exchanger is arranged at an angle, the air resistance increases and the air volume decreases during installation, which leads to a decrease in the heat exchange performance and affects the heat exchange performance of the heat exchanger. Summary of the Invention

[0003] The present invention provides a heat exchanger which can better adapt to changes in air flow, which is advantageous to improving the heat exchange performance of the heat exchanger.

[0004] According to a first aspect of the present invention, the present invention provides a heat exchanger, comprising: a fin including a plurality of first holes, the first holes passing through the fin along a thickness of the fin, the plurality of first holes being spaced apart along a length of the fin; a heat exchange tube passing through the first hole and connected to the fin, the heat exchange tube being a plurality of heat exchange tubes arranged at intervals along a longitudinal direction of the fin; A plane perpendicular to the thickness direction of the fin is defined as a first plane, and a projection line of the heat exchange tube in the width direction and a projection line of the fin in the length direction on the first plane have an included angle α, and the included angle α is greater than or equal to 20 degrees and less than or equal to 60 degrees.

[0005] The heat exchanger of the present invention includes a fin and a heat exchange tube, the fin includes a plurality of first holes, the heat exchange tube passes through the first holes and is connected to the fin, and the width direction of the heat exchange tube and the length direction of the fin have an included angle α, the included angle α being greater than or equal to 20 degrees and less than or equal to 60 degrees, which allows the heat exchanger to better adapt to changes in airflow, reduce wind resistance, and is favorable for improving the heat exchange performance of the heat exchanger.

[0006] In some embodiments, the fin includes an air vent located on at least one side of the first hole in a width direction and / or located on at least one side of the first hole in a height direction.

[0007] In some embodiments, the vent comprises a plurality of blades, the length of the blades and the length of the heat exchange tube have an included angle γ, the included angle γ being greater than or equal to 30 degrees and less than or equal to 70 degrees.

[0008] In some embodiments, the fin includes a protrusion, the protrusion being located on at least one widthwise side of the first aperture.

[0009] In some embodiments, a cross-section of the heat exchange tube includes a first straight segment, a first connecting segment, a second straight segment, and a second connecting segment connected in sequence from end to end, the first straight segment and the second straight segment being spaced apart along a height direction of the heat exchange tube, the first connecting segment and the second connecting segment being spaced apart along a width direction of the heat exchange tube, a width of the heat exchange tube is defined as W, a height of the heat exchange tube is defined as H, and a ratio of the width W of the heat exchange tube to the height H of the heat exchange tube is less than 3.5.

[0010] In some embodiments, the heat exchanger includes first and second tubes arranged in a spaced apart relationship, the heat exchange tubes communicating with the first and second tubes, and a length of the first and / or second tubes parallel to a length of the fins.

[0011] In some embodiments, the horizontal direction is defined as a first direction, and the width direction of the heat exchange tube and the first direction have an included angle β, and the included angle β is greater than or equal to 0 degrees and less than 60 degrees.

[0012] In some embodiments, the width of the fin is defined as M and the width of the heat exchange tube is defined as W, where 40°≦(α+β)≦60° for 0.8≦W / M<1 and 60°<(α+β)≦90° for W / M<0.8.

[0013] In some embodiments, there are at least two rows of the heat exchange tubes, the at least two rows of the heat exchange tubes being spaced apart across the width of the fin.

[0014] In some embodiments, the heat exchange tubes include a first row of heat exchange tubes and a second row of heat exchange tubes, the first row of heat exchange tubes and the second row of heat exchange tubes are spaced apart across the width of the fin, and the tube spacing of the heat exchange tubes in the second row is greater than the tube spacing of the heat exchange tubes in the first row.

[0015] According to a second aspect of the present invention, the present invention provides an air conditioning unit comprising a casing and a heat exchanger, the heat exchanger being located within the casing, the heat exchanger being a heat exchanger as described in any one of the above embodiments, and in the first plane, a longitudinal projection of the heat exchanger is inclined relative to a height direction of the casing.

[0016] The present invention can satisfy the requirement that the wind resistance is not large when the heat exchanger of the air conditioning unit is installed at an angle, and can ensure good heat exchange performance.

[0017] However, the above general description and the following detailed description are merely exemplary and are not intended to be limiting of the present invention. [Brief description of the drawings]

[0018] [Figure 1]1 is a schematic diagram of a three-dimensional structure of a heat exchanger according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a schematic diagram of a partial structure of a heat exchanger provided by the present invention; [Diagram 3] FIG. 3 is an enlarged view of a portion A in FIG. 2. [Figure 4] 2 is a schematic cross-sectional view of a fin of a heat exchanger according to an embodiment of the present invention; [Diagram 5] 2 is a schematic cross-sectional view of a heat exchanger fin according to an embodiment of the present invention; FIG. [Figure 6] 2 is a schematic diagram of the three-dimensional structure of a fin of a heat exchanger according to an embodiment of the present invention; [Figure 7] 1 is a schematic cross-sectional view of a heat exchanger tube according to an embodiment of the present invention; [Figure 8] 4 is a schematic structural diagram of a heat exchanger fin according to another embodiment of the present invention; [Figure 9] 4 is a schematic structural diagram of a heat exchanger fin according to another embodiment of the present invention; [Figure 10] 4 is a schematic cross-sectional view of a fin of a heat exchanger according to another embodiment of the present invention; [Figure 11] 1 is a partial schematic diagram of an air conditioning unit according to an embodiment of the present invention; [Figure 12] BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view of an air conditioning unit according to an embodiment of the present invention, which is incorporated in and constitutes a part of the specification, illustrates an embodiment consistent with the present invention, and together with the specification serves to explain the principles of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] In order to better understand the technical solution of the present invention, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings.

[0020] It should be noted that the described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained by those skilled in the art without creative ingenuity according to the embodiments of the present invention are within the scope of protection of the present invention.

[0021] The terms used in the embodiments of the present invention are intended to describe particular embodiments and are not intended to limit the present invention. Unless the context clearly indicates otherwise, the singular forms "a," "the," and "the" as used in the embodiments of the present invention and the appended claims include the plural forms.

[0022] In addition, the term "and / or" used in the specification is intended to explain the relation between related objects, and indicates that three types of relations may exist, for example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the specification, the character " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0023] In addition, directions such as "up", "down", "left", and "right" described in the embodiments of the present invention are described in terms of angles shown in the drawings, and are not intended to limit the embodiments of the present invention. In addition, when the context describes that one component is connected "up" or "down" to another component, it may be directly connected to the "up" or "down" of the other component, or it may be connected to the "up" or "down" of the other component via an intermediate component.

[0024] Below, several embodiments of the heat exchanger and air conditioning unit of the present invention are described in detail. The following contents are merely implementation details provided for ease of understanding and are not essential items for implementing the present solution.

[0025] The present invention provides a heat exchanger, as shown in Figs. 1-10, the heat exchanger includes a fin 11, as shown in Fig. 4, the fin 11 includes a plurality of first holes 111, the first holes 111 penetrate the fin 11 along the thickness direction of the fin, and the plurality of first holes 111 are spaced apart along the length direction of the fin; and a heat exchange tube 12 penetrates the first hole 111 and is connected to the fin 11, the heat exchange tube 12 is a plurality of heat exchange tubes 12, and the plurality of heat exchange tubes 12 are spaced apart along the length direction of the fin. A plane perpendicular to the thickness direction of the fin 11 is defined as a first plane, and a certain included angle α is formed between the width direction projection line of the heat exchange tube 12 and the length direction projection line of the fin 11 on the first plane, the included angle α being greater than 20 degrees and less than 60 degrees.

[0026] For ease of understanding, the embodiments of the present invention are marked with directions, and the width direction of the fin 11 is the x1 direction shown in Figures 1, 4 and 5, the length direction of the fin 11 is the y1 direction shown in Figures 1, 4 and 5, the thickness direction of the fin 11 is the z1 direction shown in Figures 1 and 6, the width direction x1, length direction y1 and thickness direction z1 of the fin 11 are approximately vertical, the width direction of the heat exchange tube 12 is the x2 direction shown in Figure 5, the height direction of the heat exchange tube 12 is the y2 direction shown in Figure 5, the length direction (not shown) of the heat exchange tube 12 coincides with the thickness direction z1 of the fin, the width direction x2, height direction y2 and length direction z1 of the heat exchange tube 12 are approximately vertical, the width direction of the first hole 111 and the width direction of the heat exchange tube 12 coincide with each other, which is the x2 axis direction shown in Figure 5, and the height direction of the first hole 111 and the height direction of the heat exchange tube 12 coincide with each other, which is the y2 axis direction shown in Figure 5.

[0027] In this embodiment, as shown in Figures 1 to 3, the heat exchanger 100 includes fins 11 and heat exchange tubes 12, the fins 11 have a length, a width and a thickness, the fins 11 are provided with first holes 111, the first holes 111 penetrate the fins 11 along the thickness direction z1 of the fins, and a plurality of first holes 111 are arranged at intervals along the longitudinal direction y1 of the fins, the first holes 111 are used for drilling the heat exchange tubes 12, the heat exchange tubes 12 penetrate the first holes 111 and are connected to the fins 11, and optionally the heat exchange tubes 12 may be connected to the fins 11 by welding, the heat exchange tubes 12 are multiple, and the plurality of heat exchange tubes 12 are arranged at intervals along the longitudinal direction y1 of the fins 11.

[0028] Specifically, each fin 11 is provided with a plurality of first holes 111, the plurality of first holes 111 are spaced apart along the longitudinal direction y1 of the fin, and the plurality of heat exchange tubes 12 pass through the plurality of first holes 111 in each fin 11 and are connected to the fin 11. There may be a plurality of fins 11, the plurality of fins 11 being spaced apart along the thickness direction z1 of the fin, and each heat exchange tube 12 can pass through the first holes 111 in the plurality of fins 11 along the longitudinal direction of the heat exchange tube 12.

[0029] As shown in Fig. 4, the plane perpendicular to the thickness direction z1 of the fin 11 is defined as the first plane, and Fig. 4 is a cross-sectional view of the fin 11 on the first plane, and the projection line of the width direction x2 of the heat exchange tube 12 and the projection line of the length direction y1 of the fin 11 on the first plane have an included angle α, which is greater than or equal to 20 degrees and less than or equal to 60 degrees. The heat exchange tube 12 has a width and a height, and the projection line of the width direction x2 of the heat exchange tube and the projection line of the length direction y1 of the fin on the first plane have an included angle α, that is, the width direction x2 of the heat exchange tube 12 is inclined at a certain angle to the length direction y1 of the fin 11, thus the heat exchanger can better adapt to the change of airflow, reduce the wind resistance, and be favorable to improving the heat exchange performance of the heat exchanger.

[0030] Specifically, when the heat exchanger 100 is in operation, the heat exchange medium flows through the heat exchange tubes 12 to exchange heat, and the fins 11 exchange heat with the air. When the included angle α between the width direction x2 of the heat exchange tubes 12 and the length direction y1 of the fins 11 is less than 20 degrees, the width direction x2 of the heat exchange tubes is installed almost parallel to the length direction y1 of the fins, so that the number of heat exchange tubes 12 within a certain fin length is reduced, the heat exchange of the heat exchange medium is reduced, and the heat exchange performance of the entire heat exchanger is reduced. When the included angle α is greater than 60 degrees, the included angle between the width direction x2 of the heat exchange tubes and the length direction y1 of the fins is too large, and when the heat exchanger 100 needs to be arranged at an angle, the area of ​​the leeward side after the heat exchange tubes 12 is too large, and the wind resistance is too large, which reduces the heat exchange performance of the heat exchanger. Therefore, by setting the included angle α between the width direction x2 of the heat exchange tube and the length direction y1 of the fin to be greater than or equal to 20 degrees and less than or equal to 60 degrees, the heat exchanger can better adapt to changes in air flow, reduce wind resistance, and be advantageous in improving the heat exchange performance of the heat exchanger.

[0031] In some embodiments, as shown in Figures 5 and 6, the fin 11 includes a ventilation window 112, which is located on at least one side of the width of the first hole 111 and / or the ventilation window is located on at least one side of the height of the first hole.

[0032] Specifically, the ventilation window 112 is a window on the fin 11, and by providing the ventilation window 112 on the fin 11, the fin can allow air to circulate through the ventilation window 112, enhancing heat exchange with the air and improving the heat exchange performance of the heat exchanger. In some specific embodiments, the ventilation window 112 and the fin 11 may have an integrally molded structure.

[0033] In this embodiment, the first hole 111 is used to attach the heat exchange tube 12, the first hole 111 resembles the cross-sectional contour of the heat exchange tube 12, the width direction of the first hole 111 coincides with the width direction of the heat exchange tube 12, which is the x2 direction in Figure 5, and the height direction of the first hole 111 coincides with the height direction of the heat exchange tube 12, which is the y2 direction in Figure 5. The ventilation window 112 is located on at least one side in the width direction of the first hole 111, i.e., the ventilation window 112 may be provided on one side of the first hole 111 in the x2 direction (left and right direction in FIG. 5), or the ventilation window 112 may be provided on both the left and right sides of the first hole 111, or the ventilation window 112 is located on at least one side in the height direction of the first hole 111, i.e., the ventilation window 112 may be located on one side of the first hole 111 in the y2 direction (up and down direction in FIG. 5), or the ventilation window 112 may be provided on both the top and bottom sides of the first hole 111, or, as shown in FIG. 5, the ventilation window 112 may be arranged on both the left and right sides and the top and bottom sides of the first hole 111. By arranging a plurality of ventilation windows 112 around the first hole 111 of the fin 11, heat exchange with air is strengthened, thereby improving the heat exchange efficiency of the heat exchanger.

[0034] In some embodiments, the ventilation window 112 includes a plurality of blades 1121, and the length direction of the blades 1121 and the length direction of the fin 11 have an included angle γ, and the included angle γ is greater than or equal to 30 degrees and less than or equal to 70 degrees.

[0035] As shown in Fig. 5, the ventilation window 112 includes a plurality of blades 1121, each of which has a certain length, and the length direction of the blades 1121 is the y3 direction shown in Fig. 5, and the blades 1121 extend along the y3 direction, and the length direction y3 of the blades 1121 and the length direction y1 of the fins 11 have a certain included angle γ, which is greater than or equal to 30 degrees and less than or equal to 70 degrees. By setting the included angle γ to be greater than or equal to 30 degrees and less than or equal to 70 degrees, the ventilation window 112 can better adapt to changes in airflow, improve the heat exchange with the air, and thus improve the heat exchange efficiency of the high-temperature heat exchanger.

[0036] In addition, the blades 1121 of the ventilation window 112 may have a shutter structure, in which the blades 1121 protrude from both sides of the plane on which the fins 11 are located, or the blades 1121 of the ventilation window 112 may have a bridge structure, in which the blades 1121 protrude from one side of the plane on which the fins 11 are located, or the blades of the ventilation window 112 may have other blade structures, and heat exchange with the air can be enhanced through the blades of the ventilation window 112.

[0037] Optionally, when the longitudinal direction y3 of the blade 1121 is perpendicular to the air flow direction, the air flow can directly pass through the gaps between the multiple blades 1121 on the fin to perform heat exchange, thereby improving the heat exchange with the air and better improving the heat exchange efficiency of the heat exchanger.

[0038] In some embodiments, the fin 11 includes a protrusion 113, the protrusion 113 being located on at least one side of the first hole 111 in the width direction.

[0039] As shown in Figures 3, 5 and 6, the fin 11 includes a protrusion 113, which protrudes from the plane in which the fin 11 is located, and the protrusion 113 is located on one side of the width direction x2 of the first hole 111, or the protrusions 113 are also provided on both sides of the width direction x2 of the first hole 111, and the protrusions 113 are arranged on both sides of the width direction x1 of the fin 11 at intervals, and optionally the protrusions 113 are arranged to extend along the longitudinal direction y1 of the fin 11. The provision of the protrusions 113 on the fin 11 improves the strength of the entire fin 11 and helps to improve the reliability of the heat exchanger.

[0040] In addition, the protrusions of the present invention may have other structures that can enhance the strength of the fins, and are not limited thereto.

[0041] In some embodiments, as shown in FIG. 7 , the cross-section of the heat exchange tube 12 includes a first straight segment 121, a first connecting segment 122, a second straight segment 123 and a second connecting segment 124 connected in sequence from end to end, the first straight segment 121 and the second straight segment 123 are spaced apart along the height direction y2 of the heat exchange tube 12, the first connecting segment 122 and the second connecting segment 124 are spaced apart along the width direction x2 of the heat exchange tube 12, the width of the heat exchange tube 12 is defined as W, the height of the heat exchange tube 12 is defined as H, and the ratio of the width W of the heat exchange tube 12 to the height H of the heat exchange tube 12 is less than 3.5.

[0042] In this embodiment, the cross-section of the heat exchange tube 12 includes a first straight segment 121, a first connecting segment 122, a second straight segment 123 and a second connecting segment 124, which are connected in a closed loop from end to end. Optionally, the first connecting segment 122 and the second connecting segment 124 may be arc-shaped. The ratio of the width W of the heat exchange tube 12 to the height H of the heat exchange tube 12 is less than 3.5. The cross-section of the heat exchange tube 12 with such a structure is flat, which can effectively reduce the flow resistance between the air and the heat exchange tube 12, reduce unnecessary air flow loss, and improve the heat exchange efficiency. When used in combination with the fins 11 of the embodiment of the present invention, it can adapt to changes in airflow distribution to the maximum extent, reduce wind resistance, and improve the heat exchange effect of the heat exchanger.

[0043] In some embodiments, the heat exchanger 100 further includes a first tube 13 and a second tube 14, the first tube 13 and the second tube 14 being spaced apart, the heat exchange tube 12 communicating with the first tube 13 and the second tube 14, and the longitudinal direction of the first tube 14 and / or the second tube 14 being parallel to the longitudinal direction y1 of the fin 11.

[0044] In this embodiment, as shown in FIG. 1 , the heat exchanger 100 further includes a first tube 13 and a second tube 14, one end of the heat exchange tube 12 in the longitudinal direction z1 is directly or indirectly connected to the first tube 13, and the other end of the heat exchange tube 12 in the longitudinal direction z1 is directly or indirectly connected to the second tube 14, the heat exchange tube 12 communicates with the first tube 13 and the second tube 14, and the first tube 13 and the second tube 14 are used for collecting and distributing the heat exchange medium.

[0045] The length direction of the first tube 13 is parallel to the length direction of the fins 11, which is the y1 direction in Fig. 1, or the length direction of the second tube 14 is parallel to the length direction of the fins 11, which is the y1 direction in Fig. 1, or the length directions of the first tube 13 and the second tube 14 are both parallel to the length direction of the fins 11, which is the y1 direction in Fig. 1. In this way, the heat exchanger 100 is free from unevenness caused by the included angle between the width direction of the heat exchange tubes and the length direction of the fins in a plane perpendicular to the fin width direction x1, which makes it easier to assemble and use the heat exchanger.

[0046] In some embodiments, the horizontal direction is defined as the first direction D1, and the width direction x2 of the heat exchange tube and the first direction D1 have an included angle β, where the included angle β is greater than or equal to 0 and less than 60 degrees.

[0047] As shown in FIG. 4, in this embodiment, the horizontal direction is defined as the first direction D1, and the heat exchanger 100 is arranged at an angle along the horizontal direction, and an included angle is formed between the heat exchanger 100 and the first direction D1, and an included angle is formed between the width direction x2 of the heat exchange tube and the first direction D1. When the heat exchanger 100 is in an operating state, air flows through the heat exchanger, and when the air flows through the heat exchanger 100 along the first direction D1, the included angle is formed between the direction of the air flow and the width direction x2 of the heat exchange tube, and the included angle is greater than or equal to 0 and less than 60 degrees.

[0048] Specifically, when the heat exchanger 100 is in operation, the air flows through the heat exchanger 100 along the first direction D1, that is, the air flows through the heat exchanger along the first direction D1, and the side through which the air passes first is the upwind side, and the side through which the air passes last is the downwind side. When the width direction of the heat exchanger tubes and the length direction of the fins are vertically installed, when the heat exchanger 100 is inclined relative to the horizontal direction D1, the included angle between the air flow direction D1 and the width direction x2 of the heat exchange tube 12 is too large, so that the area of ​​the downstream side of the heat exchange tube is large. The downstream area includes the entire width direction area of ​​the downstream side of the heat exchange tube 12 and the height direction area of ​​the downstream side of the heat exchange tube 12, and the area is close to the outer contour cross-sectional area of ​​the heat exchange tube 12. A low-speed vortex area is formed in the downstream area, and the heat flow density in the width direction x2 of the heat exchange tube 12 is large. The low-speed vortex area reduces the heat exchange coefficient, thereby reducing the heat exchange efficiency of the heat exchanger.

[0049] In the embodiment of the present invention, the air flow direction is horizontal, i.e., the first direction D1, and the included angle β between the air flow direction D1 and the width direction x2 of the heat exchange tube 12 is greater than 0 and less than 60 degrees, so that the area of ​​the low-speed vortex area on the leeward side of the heat exchange tube 12 is relatively small, the heat flow density of the low-speed vortex area here is low, and the impact on the heat exchange coefficient is small, improving the heat exchange efficiency of the heat exchanger. On the other hand, since the included angle β between the air flow direction D1 and the width direction x2 of the heat exchange tube 12 is greater than 0 and less than 60 degrees, at the same wind speed, the wind resistance of the heat exchanger 100 is reduced, the heat exchange amount is improved, and the heat exchange efficiency of the heat exchanger is improved.

[0050] Here, in this embodiment, the air flow direction is aligned with the horizontal direction; in other specific embodiments, when the air flow direction does not pass through the heat exchanger along the horizontal direction but flows through the heat exchanger along another direction, if the included angle β between the air flow direction and the width direction x2 of the heat exchange tube 12 is greater than or equal to 0 and less than 60 degrees, the heat exchanger can better adapt to changes in air flow, reduce wind resistance, improve the heat exchange amount, and improve the heat exchange efficiency of the heat exchanger.

[0051] Alternatively, the angle β between the width direction x2 of the heat exchange tube 12 and the first direction D1 is equal to 0 degrees, i.e., the width direction x2 of the heat exchange tube 12 coincides with the air flow direction. In this case, the wake area on the leeward side of the heat exchange tube 12 is the smallest, which is more favorable for improving the heat exchange efficiency of the heat exchanger.

[0052] In some embodiments, the width of the fin 11 is defined as M and the width of the heat exchange tube 12 is defined as W, and if 0.8≦W / M<1, then 40°≦(α+β)≦60°, and if W / M<0.8, then 60°<(α+β)≦90°.

[0053] In this embodiment, when the heat exchanger 100 is in operation, the length that the air flow passes through the fins is M / sin(α+β), and if this length is too long, the resistance of the wind will be large and the wind will not travel along this route, so this length must not be too long. On the other hand, if this length is too short, the path through which the wind passes through the fins will be too short, and the wind will flow before sufficient heat exchange has occurred, so this length must not be too short. There is an optimal range for this value, and within this range, the balance between the resistance of the wind and the heat exchanger will be kept relatively good, and high heat exchange efficiency can be maintained.

[0054] When the ratio of the width W of the heat exchange tube to the width M of the fin is large, that is, when the width W of the heat exchange tube is close to the width M of the fin, this path should be lengthened to improve the heat exchange efficiency. Therefore, when 0.8≦W / M<1, it is set to 40°≦(α+β)≦60°, and at this time, the value of M / sin(α+β) is larger, which is more favorable for improving the heat exchange. When the ratio of the width W of the heat exchange tube to the width M of the fin is small, that is, when the width M of the fin 11 is wide, the width W of the heat exchange tube 12 is small, and the fin is sufficient for heat exchange, and the wind resistance cannot be reduced unless the wind flows along the shortest route, therefore, when W / M<0.8, it is set to 60°<(α+β)≦90°, and at this time, the value of M / sin(α+β) is smaller, which is more favorable for improving the heat exchange efficiency. Therefore, by setting 40°≦(α+β)≦60° when 0.8≦W / M<1, and 60°<(α+β)≦90° when W / M<0.8, the length over which the air flows through the fins 11 can be kept within an appropriate range when the range of the ratio of the width M of the fins 11 to the width W of the heat exchanger tube is different, the wind resistance and the heat exchanger can be kept in a relatively balanced state, and high heat exchange efficiency can be maintained.

[0055] In some embodiments, as shown in Figures 8-10, there are at least two rows of heat exchange tubes 12, and the at least two rows of heat exchange tubes 12 are spaced apart along the width of the fin, where each row of heat exchange tubes 12 is spaced apart along the length of the fin.

[0056] As shown in FIG. 8, there are two rows of heat exchange tubes, and the two rows of heat exchange tubes 12 are spaced apart along the width direction x1 of the fin 11; as shown in FIG. 9, there are three rows of heat exchange tubes, and the three rows of heat exchange tubes 12 are spaced apart along the width direction x1 of the fin; of course, there may be four or more rows of heat exchange tubes 12, and one heat exchanger 100 is provided with two or more rows of heat exchange tubes 12, which can improve the heat exchange efficiency of the heat exchanger.

[0057] In addition, when the heat exchanger 100 has two or more rows of heat exchange tubes 12, the heat exchange tubes 12 may be located in the same fin 11, i.e., two or more rows of first holes 111 are provided in the same fin 11, and the two or more rows of heat exchange tubes 12 are inserted into the corresponding first holes 111; alternatively, the two or more rows of heat exchange tubes 12 may be located in two or more fins 11, and two or more fins 11 are provided along the width direction x1 of the fins, one fin 11 is provided with one row of first holes 111, and the two or more rows of heat exchange tubes 12 are respectively inserted into the first holes 111 of the two or more fins 11 correspondingly, thereby forming two or more rows of heat exchange tubes 12 along the width direction x1 of the fins.

[0058] In some embodiments, the heat exchange tubes 12 include a first row of heat exchange tubes and a second row of heat exchange tubes, the first row of heat exchange tubes and the second row of heat exchange tubes are spaced apart across the width of the fin, and the tube spacing of the heat exchange tubes in the second row is greater than the tube spacing of the heat exchange tubes in the first row.

[0059] Specifically, as shown in FIG. 10, when the heat exchanger 100 is in an operating state, when air flows through the heat exchanger 100, the side through which the air passes first is the upwind side, and the side through which the air passes last is the downwind side. In this embodiment, the heat exchange tubes 12 include a first row of heat exchange tubes and a second row of heat exchange tubes, and the first row of heat exchange tubes and the second row of heat exchange tubes are arranged at a distance from each other in the width direction of the fin, and the first row of heat exchange tubes located on one side of the width direction of the fin are located on the upwind side, and the second row of heat exchange tubes located on the other side of the width direction of the fin are located on the downwind side, and the distance S2 between adjacent heat exchange tubes 12 in the second row located on the downwind side is greater than the distance S1 between adjacent heat exchange tubes 12 in the first row of heat exchange tubes 12 located on the upwind side.

[0060] When the heat exchanger 100 has at least two rows of heat exchange tubes 12, the temperature difference between the airflow and the heat exchange medium on the upwind side is large, and the heat exchange efficiency of the heat exchange tubes 12 on the upwind side is higher than that of the heat exchange tubes 12 on the downwind side. Therefore, by narrowing the tube spacing of the heat exchange tubes 12 on the upwind side and providing more heat exchange tubes 12, the heat exchange efficiency of the heat exchanger can be improved. In addition, by widening the tube spacing between adjacent heat exchange tubes 12 on the downwind side and reducing the number of heat exchange tubes 12 on the downwind side, the wind resistance on the downwind side can be reduced, which is more advantageous for improving the heat exchange efficiency of the entire heat exchanger 100.

[0061] Furthermore, when the heat exchange tubes 12 are in three or more rows, the tube spacing of the heat exchange tubes 12 in the row located on the downwind side is similarly larger than the tube spacing of the heat exchange tubes 12 in the row located on the upwind side, which is further advantageous in improving the heat exchange efficiency of the heat exchanger.

[0062] An embodiment of the present invention further provides an air conditioning unit, which includes a casing 200 and a heat exchanger 100, the heat exchanger 100 is located in the casing 200, the heat exchanger 100 is the heat exchanger of any one of the above embodiments, and in a first plane, the longitudinal projection of the heat exchanger 100 is inclined relative to the height direction of the casing.

[0063] As shown in Fig. 11 and Fig. 12, the heat exchanger 100 is located in the casing 200, and in the first plane, the projection of the length of the heat exchanger 100 is inclined to the height direction of the casing 200, the length direction of the heat exchanger 100 coincides with the length direction y1 of the fin 11, and the height direction of the casing 200 is the up-down direction in the drawing, and as shown in Fig. 12, the projection of the length of the heat exchanger 100 in the first plane is inclined to the up-down direction. The heat exchanger 100 is disposed obliquely to the casing 200, which can reduce the overall height of the air conditioning unit and improve the applicability of the air conditioning unit. The width direction of the heat exchange tube 12 of the heat exchanger 100 and the length direction of the fin have an included angle α, which is greater than or equal to 20 degrees and less than or equal to 60 degrees, and the heat exchanger 100 can better adapt to changes in air flow and can meet the requirement that the wind is not large when the heat exchanger 100 is disposed obliquely, ensuring good heat exchange performance and thus improving the heat exchange performance of the air conditioning unit.

[0064] The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. All modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. [Explanation of symbols]

[0065] 100 heat exchanger 200 Casing 11 Finn 111 Hole 1 112 Ventilation window 1121 Blade 113 Protrusion 12 Heat exchange tube 121 First Straight Segment 122 First Connection Segment 123 Second straight line segment 124 Second Connection Segment 13 1st tube 14 2nd pipe

Claims

1. 1. A heat exchanger comprising: a fin including a plurality of first holes, the first holes passing through the fin along a thickness direction of the fin, the plurality of first holes being spaced apart along a length direction of the fin; a heat exchange tube passing through the first hole and connected to the fin, the heat exchange tube being a plurality of heat exchange tubes arranged at intervals along a longitudinal direction of the fin; A plane perpendicular to the thickness direction of the fin is defined as a first plane, and a projection line of the heat exchange tube in the width direction and a projection line of the fin in the length direction on the first plane have an included angle α, and the included angle α is 20 degrees or more and 60 degrees or less. A heat exchanger comprising:

2. The fin has a ventilation window located on at least one side in a width direction of the first hole and / or located on at least one side in a height direction of the first hole.

2. The heat exchanger according to claim 1 .

3. The ventilation window has a plurality of blades, and a longitudinal direction of the blades and a longitudinal direction of the heat exchange tube have an included angle γ, and the included angle γ is greater than or equal to 30 degrees and less than or equal to 70 degrees.

3. The heat exchanger according to claim 2.

4. The fin includes a protrusion, and the protrusion is located on at least one side of the first hole in a width direction.

2. The heat exchanger according to claim 1 .

5. a cross section of the heat exchange tube includes a first straight segment, a first connecting segment, a second straight segment, and a second connecting segment connected in sequence from end to end, the first straight segment and the second straight segment are spaced apart along a height direction of the heat exchange tube, the first connecting segment and the second connecting segment are spaced apart along a width direction of the heat exchange tube, a width of the heat exchange tube is defined as W, a height of the heat exchange tube is defined as H, and a ratio of the width W of the heat exchange tube to the height H of the heat exchange tube is less than 3.5; 2. The heat exchanger according to claim 1 .

6. The heat exchanger includes a first tube and a second tube arranged at a distance from each other, the heat exchange tube communicates with the first tube and the second tube, and a length direction of the first tube and / or the second tube is parallel to a length direction of the fin.

2. The heat exchanger according to claim 1 .

7. The horizontal direction is defined as a first direction, and the width direction of the heat exchange tube and the first direction have an included angle β, and the included angle β is greater than or equal to 0 degrees and less than 60 degrees; 2. The heat exchanger according to claim 1 .

8. The width of the fin is defined as M, the width of the heat exchange tube is defined as W, and when 0.8≦W / M<1, 40°≦(α+β)≦60°, and when W / M<0.8, 60°<(α+β)≦90°.

8. A heat exchanger according to claim 7.

9. The heat exchange tubes are in at least two rows, the at least two rows of the heat exchange tubes being spaced apart along the width of the fin.

2. The heat exchanger according to claim 1 .

10. the heat exchange tubes include a first row of heat exchange tubes and a second row of heat exchange tubes, the first row of heat exchange tubes and the second row of heat exchange tubes are spaced apart in a width direction of the fin, and a tube spacing between the heat exchange tubes in the second row is greater than a tube spacing between the heat exchange tubes in the first row; 10. The heat exchanger according to claim 9.

11. An air conditioning unit, The apparatus includes a casing and a heat exchanger, The heat exchanger is located within the casing, and the heat exchanger is the heat exchanger according to any one of claims 1 to 10, and in the first plane, a projection of the heat exchanger in the longitudinal direction is inclined with respect to a height direction of the casing. An air conditioning unit characterized by:

Images