Heat exchanger

Abstract

The heat exchanger comprises a plurality of fins and a plurality of heat exchange tubes, the fins are arranged in a stacked mode, each fin is provided with a plurality of hole opening parts, the hole opening parts are arranged at intervals in the length direction of the fins, and the heat exchange tubes are arranged in at least part of the hole opening parts in the arrangement direction of the fins; the fins are further provided with a plurality of protruding parts, the protruding parts are located on at least one side edge in the length direction of the fins, the protruding parts protrude out of one side in the thickness direction of the fins, and the protruding parts are arranged in the length direction of the fins at intervals. The fins of the heat exchanger have higher strength, and the surfaces of the fins have longer overall frosting time when the heat exchanger works.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, specifically to a heat exchanger for a heat pump. Background Technology

[0002] Finned heat exchangers offer better heat exchange performance than traditional corrugated finned heat exchangers. However, they also present certain challenges in application. For instance, due to their thinner thickness and lower strength, finned heat exchangers are prone to bending or collapsing during assembly and transportation. Furthermore, since most finned heat exchangers are flat, the overall frosting time on the fin surface is shorter when used as heat pump heat exchangers, negatively impacting their heat exchange performance. Utility Model Content

[0003] This application provides a heat exchanger with fins having higher strength and a longer overall frosting time on the fin surface during operation.

[0004] The heat exchanger provided in this application includes multiple fins and multiple heat exchange tubes. The multiple fins are stacked and arranged in a stacked manner. Each fin has multiple openings, which are spaced apart along the length direction of the fin. The heat exchange tubes are disposed within at least a portion of the openings. Each fin also has multiple protrusions, which are located on at least one side along the length direction of the fin and protrude outward from one side along the thickness direction of the fin. The multiple protrusions are spaced apart along the length direction of the fin.

[0005] The heat exchanger fins have multiple protrusions on at least one side along their length. These protrusions increase the strength of the fins at these side positions, reducing the likelihood of the fins bending or collapsing. During operation, the protrusions turbulent the airflow, disrupting laminar flow between the fins. This enhances the heat exchange performance at the protrusion locations, and also delays the frosting time at these locations compared to other areas, thus extending the overall frosting time of the fins. Attached Figure Description

[0006] Figure 1 A schematic diagram of the structure of the heat exchanger provided in this application in a specific embodiment;

[0007] Figure 2 for Figure 1 A schematic diagram of the structure of the heat exchanger fins in a specific embodiment;

[0008] Figure 3 for Figure 1 A schematic diagram of the structure of the heat exchanger fins in the second specific embodiment;

[0009] Figure 4 for Figure 1 A partially enlarged structural diagram of the heat exchanger at point A;

[0010] Figure 5 for Figure 3 A side view of the structure of the middle fin;

[0011] Figure 6 for Figure 1 A schematic diagram of the structure of the heat exchanger fins in the third specific embodiment;

[0012] Figure 7 for Figure 1 A schematic diagram of the structure of the heat exchanger fins in the fourth specific embodiment;

[0013] Figure 8 for Figure 1 A schematic diagram of the structure of the heat exchanger fins in the fifth specific embodiment;

[0014] Figure 9 for Figure 8 A schematic diagram of the planar structure of the fins in the image;

[0015] Figure 10 for Figure 1 A schematic diagram of the structure of the heat exchanger fins in the sixth specific embodiment.

[0016] Reference numerals: fin 1, opening 11, first notch 111, protrusion 12, bulge 121, first side 13, second side 14, first rib 15, second rib 16, first convex section 161, second convex section 162, connecting convex section 163, window 17, first flange 18, second flange 19, heat exchange tube 2, first straight line 3.

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0018] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0019] It should be understood that the described embodiments are merely a part of the technical solutions of this application, and not all of them. All other technical solutions obtained by those skilled in the art based on the technical solutions in this application without inventive effort are within the scope of protection of this application.

[0020] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0023] like Figure 1-10 As shown, this application embodiment provides a heat exchanger with higher fin strength and a longer overall frosting time on the fin surface during operation. Specifically, the heat exchanger includes multiple fins 1 and multiple heat exchange tubes 2. The multiple fins 1 are arranged in a spaced-apart stacked manner. Each fin 1 has multiple openings 11, which are spaced apart along the length direction of the fin 1 and extend through the thickness direction of the fin 1. The heat exchange tubes 2 are disposed within at least a portion of the openings 11 along the arrangement direction of the fins 1. The fins 1 also have multiple protrusions 12, which are located on at least one side along the length direction of the fin 1 and protrude outward from one side along the thickness direction of the fin 1. The multiple protrusions 12 are spaced apart along the length direction of the fins 1.

[0024] In this embodiment, the heat exchanger fins 1 have multiple protrusions 12 on at least one side along their length. These protrusions 12 increase the strength of the fins 1 at the side positions, thereby reducing the likelihood of the fins 1 bending or collapsing. During operation, the protrusions 12 can disturb the airflow, disrupting laminar flow between the fins 1. This enhances the heat exchange performance of the fins 1 at the protrusions 12, and also delays the frosting time at these locations compared to other locations, thus extending the overall frosting time of the fins.

[0025] Furthermore, in this embodiment, the protrusion 12 can be located on one side of the fin 1 along its length, or it can be located on both sides of the fin 1 along its length, depending on actual needs and the position of the opening 11. For example, in Figure 2 In some embodiments, when the opening 11 is located approximately in the middle of the fin 1, the fin 1 has continuous side edges on both sides along its length. Therefore, multiple protrusions 12 can be spaced apart on both sides to increase the strength of the fin 1. For example, in... Figure 3 In one embodiment, when the opening 11 extends through one side of the fin 1 along its length, that side is not suitable for arranging the protrusion 12. Therefore, it is sufficient to arrange the protrusion 12 on the other side.

[0026] It should be further explained that, in addition to increasing the strength and rigidity of the fins 1, making them less prone to bending during assembly and facilitating assembly, and improving the overall frosting time during heat exchanger operation, the protrusion 12 can also enhance heat transfer. This is because the protrusion 12 protrudes outward from one side of the fins 1 in the thickness direction. Therefore, when air flows through the fins 1, the protrusion 12 can turbulently affect the airflow, thus playing a role similar to that of a vortex generator, disrupting the laminar flow between the fins, thereby enhancing heat transfer to a certain extent.

[0027] Furthermore, the heat exchange tube 2 can be a single-channel heat exchange tube or a multi-channel microchannel flat tube. However, because microchannel flat tubes have better heat exchange performance, the overall heat exchange performance can be improved when combined with the fins 1 in the various embodiments of this document. Therefore, the heat exchange tube 2 in this application is preferably a microchannel flat tube. In addition to including multiple fins 1 and multiple heat exchange tubes 2, the heat exchanger also includes other conventional components of heat exchangers in the art, such as manifolds and distribution pipes. For example, manifolds can be inserted on both sides of the heat exchange tube 2, but since this document does not involve improvements to this part of the structure, they will not be described in detail.

[0028] like Figure 2-3 As shown, in one specific embodiment, the number of protrusions 12 is less than or equal to the number of openings 11. If a straight line parallel to the width direction of the fin 1 and passing through the midpoint of the protrusion 12 is defined as the first straight line 3, then the openings 11 are located on the extension line of the first straight line 3.

[0029] In this embodiment, the number of protrusions 12 is less than or equal to the number of openings 11, and the openings 11 are located on the extension line of the first straight line 3. When the number of protrusions 12 is equal to the number of openings 11, one protrusion 12 and one opening 11 are approximately corresponding in position and equal in number; correspondingly, when the number of protrusions 12 is less than the number of openings 11, protrusions 12 are provided on the extension line of the first straight line 3 corresponding to some openings 11, while protrusions 12 are not provided on the extension line of the first straight line 3 corresponding to other openings 11. The specific proportion can be preset according to actual usage requirements and the size of the protrusions 12, etc. The specific proportion of the protrusions 12 is not specifically limited in this article.

[0030] The function of the protrusion 12 has been explained in the above embodiment, but it should be added that the position of the protrusion 12 is also very important. After multiple openings 11 are provided at intervals on the fin 1, the strength of the fin 1 on both sides of the openings 11 is greatly affected. After the heat exchange tube 2 is inserted, the area near the openings 11 is particularly prone to deformation due to the weight of the heat exchange tube 2 and other factors. Therefore, in this embodiment, the protrusion 12 is positioned corresponding to the openings 11, which can supplement the strength of the area near the openings 11, and the effect of increasing the strength of the fin 1 will be more obvious.

[0031] Furthermore, as mentioned in the previous embodiment, the protrusion 12 can disturb the passing airflow, thereby improving heat exchange and extending the overall frosting time of the fins 1. In this embodiment, when the position of the protrusion 12 corresponds to the position of the opening 11 along the first straight line 3, the protrusion 12 can just disturb the position of the heat exchange tube 2, making the heat exchange effect between the disturbed airflow and the heat exchange tube 2 better, thus improving the heat exchange effect. Of course, the more protrusions 12, the better. If there are too many protrusions 12, the disturbance to the airflow may affect the heat exchange that occurs when the airflow passes through the openings of the fins, which may have an adverse effect on the heat exchange performance of the fins 1. Therefore, in this embodiment, the number of protrusions 12 is less than or equal to the number of openings 11.

[0032] like Figure 3 and Figure 6 As shown, in one specific embodiment, the fin 1 has a first side 13 and a second side 14 in the length direction, the opening portion 11 includes a first notch 111, the opening of the first notch 111 passes through the first side 13; the protrusion 12 includes a protrusion 121, the protrusion 121 is located on the second side 14 of the fin 1.

[0033] In this embodiment, the opening of the first notch 111 extends through the first side 13. Therefore, the bulge 121 only needs to be located on the second side 14 of the fin 1. The shape of the first notch 111 can be various, generally the same as the cross-sectional shape of the heat exchange tube 2. Therefore, when the heat exchange tube 2 is a microchannel flat tube, the shape of the first notch 111 can be a long, flat groove. In this embodiment, after the fin 1 is installed with the heat exchange tube 2 and assembled with other components into a heat exchanger, the second side 14 of the fin 1 can serve as the windward surface. When the airflow passes directly through the second side 14, part of the airflow will pass through the fin 1 and the heat exchange tube 2 under the turbulence effect of the bulge 121, and exchange heat with the fin 1 and the heat exchange tube 2.

[0034] like Figure 4-5 As shown, in one specific embodiment, if the spacing between two adjacent fins 1 is defined as P, and the outward convex height of the bulge 121 is defined as H, then 0.1P≤H≤0.9P. Besides the function mentioned in the above embodiment, the bulge 121, because it protrudes outward from one side of the thickness direction of the fin 1, can also, to some extent, maintain the spacing P between two adjacent fins 1. However, generally, this function is mainly accomplished by other components such as the flange on the fin 1. Therefore, it is not necessary for the bulge 121 to perform this function. However, if the outward convex height H of the bulge 121 is too low, its turbulence effect will be correspondingly weakened. If the outward convex height H of the bulge 121 is too high, it will adhere to another adjacent fin 1, obstructing the airflow. Therefore, when the bulge 121 is not required to maintain the spacing P between two adjacent fins 1, it is more appropriate for its outward convex height H to satisfy 0.1P≤H≤0.9P.

[0035] like Figure 3 As shown, in one specific embodiment, the projection shape of the convex 121 on the fin 1 is a semi-circle. The distance between two adjacent first notches 111 is defined as D, and the radius of the projection shape of the convex 121 is R; then 0.05D≤R≤0.5D. In this embodiment, the shape of the convex 121 is semi-circular. As can be seen from the above embodiments, the position of the convex 121 is very important. Correspondingly, based on its position, the extent of its outward protrusion on the fin 1 can also affect its function. For example, if the extent of the convex 121 is too large, the disturbance range caused by the airflow will also increase accordingly. When it exceeds a certain range, it will reduce the area of ​​contact between the airflow and the fin 1, which will have an adverse effect on the heat transfer performance of the fin 1. Therefore, when the projection shape of the convex 121 on the fin 1 is semi-circular, it is more reasonable for its projection shape radius R to satisfy 0.05D≤R≤0.5D.

[0036] like Figure 6As shown, in one specific embodiment, the projection shape of the convex hull 121 on the fin 1 is a rectangle or a polygon. The distance between two adjacent first notches 111 is defined as D, and the side length of the projection shape of the convex hull 121 in the length direction of the fin 1 is W; then 0.1D≤W≤0.9D.

[0037] like Figure 7 As shown, in one specific embodiment, the projection shape of the convex hull 121 on the fin 1 is a triangle. The distance between two adjacent first notches 111 is defined as D, the side length of the projection shape of the convex hull 121 in the length direction of the fin 1 is W, and the height of the projection shape of the convex hull 121 is L. Then 0.1D≤W≤0.9D, and 0.5≤L / W≤5.

[0038] In the two embodiments above, the projection shape of the convex hull 121 on the fin 1 is a rectangle or a polygon, or a triangle. The different shapes are just different manifestations of the convex hull 121 in different embodiments. The function of the convex hull 121 is roughly the same in different shapes. The specific shape can be preset in combination with other structures and arrangement positions on the fin, so this article will not elaborate on it.

[0039] like Figure 8-10 As shown, in one specific embodiment, the fin 1 is further provided with a first rib 15, the first rib 15 protruding outward from one side of the thickness direction of the fin 1, the first rib 15 is located between the opening portion 11 and the protrusion portion 12, and the length direction of the first rib 15 extends at least partially along the length direction of the fin 1.

[0040] The first rib 15 can further increase the strength of the fin 1 and reduce the occurrence of deformation or collapse. It should be noted that the first rib 15 can extend continuously along the length direction of the fin 1 or be arranged intermittently along the length direction of the fin 1. It can be set according to the actual situation. However, generally speaking, when the first rib 15 extends continuously along the length direction of the fin 1, the first rib 15 has a better effect on increasing the strength of the fin 1.

[0041] like Figure 9-10 As shown, in one specific embodiment, the fin 1 is further provided with a second rib 16. The second rib 16 protrudes outward from one side of the fin 1 in the thickness direction. The second rib 16 is located between two adjacent openings 11, close to the side of the opening 11, and its length direction extends at least partially along the width direction of the fin 1. When the second rib 16 is close to the side of the opening 11, more space can be reserved for the fin 1 to provide other structures such as windows and flanges as described in the following embodiments. The structures such as windows and flanges will be described in the following embodiments.

[0042] As mentioned above, after the heat exchange tube 2 is inserted, the area near the opening 11 of the fin 1 is more prone to deformation. Therefore, in addition to the first rib 15, the overall strength of the fin 1 can be increased by adding a second rib 16. Since the first rib 15 extends along the length of the fin 1 and the second rib 16 extends along the width of the fin 1, such a rib arrangement structure can enhance the strength of the fin 1 in both the length and width directions, thereby better reducing the occurrence of deformation or collapse of the fin 1.

[0043] like Figure 9-10 As shown, in one specific embodiment, at least one of the first rib 15 and the second rib 16 is opposite to the outward convex direction of the protrusion 12; the second rib 16 includes a first convex segment 161, a second convex segment 162 and a connecting convex segment 163, the length direction of the first convex segment 161 and the second convex segment 162 extends along the width direction of the fin 1, and the first convex segment 161 and the second convex segment 162 are respectively connected to the first rib 15, and the connecting convex segment 163 connects the first convex segment 161 and the second convex segment 162.

[0044] In this embodiment, when at least one of the first rib 15 and the second rib 16 is opposite to the outward convex direction of the protrusion 12, the fin 1 can have a raised reinforcing rib structure on both sides in the thickness direction. Therefore, its resistance to deformation will be stronger regardless of which side is subjected to pressure. In addition, the strength of the first notch 111 on the opening side is lower and it is more prone to deformation. After the first protrusion 161, the second protrusion 162 and the connecting protrusion 163 are connected, the strength of the first notch 111 on the opening side can be increased.

[0045] like Figure 2-3 and Figure 5-10 As shown, in one specific embodiment, the fin 1 is further provided with a window 17, a first flange 18, and a second flange 19. The window 17 is located between the first protrusion 161 and the second protrusion 162. The first flange 18 is located on the side of the window 17 facing the first rib 15, and the second flange 19 is located on the side of the window 17 facing the connecting protrusion 163. The first flange 18 and the second flange 19 can better maintain the gap between two adjacent fins 1. The flanges of the first flange 18 and the second flange 19 are oriented in opposite directions, which can better cope with pressure from different directions.

[0046] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications should also fall within the protection scope of this application.

Claims

1. A heat exchanger, characterized in that, The device includes multiple fins (1) and multiple heat exchange tubes (2). The multiple fins (1) are stacked and arranged in a stacked manner. Each fin (1) has multiple openings (11) and the multiple openings (11) are spaced apart along the length direction of the fin (1). The heat exchange tubes (2) are disposed in at least a portion of the openings (11). The fins (1) are also provided with multiple protrusions (12). Each protrusion (12) is located on at least one side of the fin (1) along the length direction and protrudes outward from one side of the fin (1) along the thickness direction. The multiple protrusions (12) are spaced apart along the length direction of the fin (1).

2. The heat exchanger according to claim 1, characterized in that, The number of protrusions (12) is less than or equal to the number of openings (11). A straight line parallel to the width direction of the fin (1) and passing through the midpoint of the protrusion (12) is defined as the first straight line (3). Then the opening (11) is located on the extension line of the first straight line (3).

3. The heat exchanger according to claim 1 or 2, characterized in that, The fin (1) has a first side (13) and a second side (14) in the length direction. The opening (11) includes a first notch (111), the opening of which penetrates the first side (13). The protrusion (12) includes a bulge (121), which is located on the second side (14) of the fin (1).

4. The heat exchanger according to claim 3, characterized in that, Let P be the spacing between two adjacent fins (1) and H be the convex height of the convex hull (121). Then 0.1P≤H≤0.9P.

5. The heat exchanger according to claim 4, characterized in that, The projection shape of the convex hull (121) on the fin (1) is a semi-circle. The distance between two adjacent first notches (111) is defined as D, and the radius of the projection shape of the convex hull (121) is R; then 0.05D≤R≤0.5D.

6. The heat exchanger according to claim 4, characterized in that, The projection shape of the convex hull (121) on the fin (1) is a rectangle or a polygon. The distance between two adjacent first notches (111) is defined as D. The side length of the projection shape of the convex hull (121) in the length direction of the fin (1) is W. Then 0.1D≤W≤0.9D.

7. The heat exchanger according to claim 4, characterized in that, The projection shape of the convex hull (121) on the fin (1) is a triangle. The distance between two adjacent first notches (111) is defined as D. The side length of the projection shape of the convex hull (121) in the length direction of the fin (1) is W. The height of the projection shape of the convex hull (121) is L. Then 0.1D≤W≤0.9D and 0.5≤L / W≤5.

8. The heat exchanger according to any one of claims 1-2 or 4-7, characterized in that, The fin (1) is also provided with a first rib (15), which protrudes outward from one side of the thickness direction of the fin (1). The first rib (15) is located between the opening (11) and the protrusion (12), and the length direction of the first rib (15) extends at least partially along the length direction of the fin (1).

9. The heat exchanger according to claim 8, characterized in that, The fin (1) is also provided with a second rib (16), which protrudes outward from one side of the thickness direction of the fin (1). The second rib (16) is located between two adjacent openings (11), and the length direction of the second rib (16) extends at least partially along the width direction of the fin (1).

10. The heat exchanger according to claim 9, characterized in that, At least one of the first rib (15) and the second rib (16) is opposite to the outward convex direction of the protrusion (12); the second rib (16) includes a first convex segment (161), a second convex segment (162) and a connecting convex segment (163), the length direction of the first convex segment (161) and the second convex segment (162) extends along the width direction of the fin (1), and the first convex segment (161) and the second convex segment (162) are respectively connected to the first rib (15), and the connecting convex segment (163) connects the first convex segment (161) and the second convex segment (162).

11. The heat exchanger according to claim 10, characterized in that, The fin (1) is also provided with a window (17), a first flange (18) and a second flange (19). The window (17) is located between the first protrusion (161) and the second protrusion (162). The first flange (18) is located on the side of the window (17) facing the first protruding rib (15). The second flange (19) is located on the side of the window (17) facing the connecting protrusion (163).

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