Elliptical tube heat exchanger and air conditioner thereof

Abstract

The utility model relates to the technical field of air conditioners, in particular to an elliptical tube heat exchanger and an air conditioner thereof. The oval tube heat exchanger comprises a plurality of fins and a plurality of heat exchange tubes, the fins are evenly distributed at intervals, each fin is provided with a plurality of oval penetrating holes, the fins are sequentially arranged in parallel, the penetrating holes in the different fins can be overlapped in the distribution direction of the fins, the number of the heat exchange tubes is multiple, and the number of the oval penetrating holes in the fins is larger than that of the heat exchange tubes. The multiple heat exchange pipes are arranged in the overlapped penetrating holes of the fins in a penetrating mode respectively, the heat exchange pipes are arranged to be oval, protrusions are arranged on the inner walls of the heat exchange pipes, and the protrusions are arranged in the axis direction of the heat exchange pipes in a protruding mode. The heat exchanger has the advantages that as the heat exchange tubes are oval, the external flow characteristic of the oval heat exchange tubes is good, the oval tubes are arranged more compactly, and the heat transfer peripheries of the oval tubes are long under the same flow area, the heat exchange efficiency is improved, and the energy consumption of an air conditioner is reduced. The protrusions can improve the turbulent flow effect and improve the temperature uniformity of the refrigerating medium so as to further improve the heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an elliptical tube heat exchanger and an air conditioner thereof. Background Art

[0002] With the popularization of air conditioners, the proportion of air conditioner electricity load in the total load in medium and large cities has reached about 40%, accounting for a huge part of electricity consumption.

[0003] In order to improve the heat exchange efficiency of air conditioners and thus reduce energy consumption, some air conditioners replace their heat exchange tubes from round tubes with elliptical tubes. The heat exchange effect of elliptical tubes is better and the structure is more compact. They have a larger heat exchange area than round tubes while occupying the same space, which improves the heat exchange efficiency and reduces the energy consumption of air conditioners. However, simply replacing round tubes with elliptical tubes has limited effect on reducing energy consumption, and the heat exchange efficiency still needs to be improved. Utility Model Content

[0004] Based on this, the utility model provides an elliptical tube heat exchanger for the above technical problems.

[0005] An elliptical tube heat exchanger, comprising: a plurality of fins, the plurality of fins being evenly spaced, each of the fins being provided with a plurality of elliptical through-holes; a heat exchange tube, the plurality of heat exchange tubes being respectively passed through overlapping through-holes of each of the fins; the heat exchange tube being elliptical, and a protrusion being constructed on the inner wall of the heat exchange tube, the protrusion being protruded from the inner wall of the heat exchange tube toward the axial direction of the heat exchange tube, and the protrusion extending along the length direction of the heat exchange tube.

[0006] In this arrangement, since the heat exchange tube is elliptical, the external flow characteristics of the elliptical heat exchange tube are good, which is convenient for the discharge of condensed water, and the elliptical tube can make the structure of the heat exchanger more compact. Under the same flow area, the heat transfer perimeter of the elliptical tube is long, and the heat exchange area is correspondingly increased. The structure also allows for a more compact arrangement, thereby increasing the heat exchange per unit volume, thereby improving the heat exchange efficiency and reducing the energy consumption of the air conditioner. In addition, since there are protrusions in the heat exchange tube, the protrusions can enhance the turbulence effect on the refrigerant medium in the heat exchange tube, improve the temperature uniformity of the refrigerant medium, and further improve the heat exchange efficiency.

[0007] In one embodiment, the protrusion extends in a spiral shape along the length direction of the heat exchange tube.

[0008] In one embodiment, the protrusion is disposed at at least one end of the long axis of the heat exchange tube, and a cross section of the protrusion extends along the circumference of the inner wall of the heat exchange tube.

[0009] In one embodiment, the cross section of the protrusion is sawtooth-shaped, the vertex angle of the sawtooth is toward the axis of the heat exchange tube, and the height H of the sawtooth-shaped protrusion is 0.1-0.5 mm.

[0010] In one embodiment, the fin includes a plurality of heat dissipation units, the heat dissipation units extend along a first direction, and each of the heat dissipation units is provided with a plurality of the perforations evenly spaced apart; the plurality of heat dissipation units are arranged in parallel along a second direction, the first direction and the second direction are set at an angle, and the perforations on adjacent heat dissipation units are staggered in the second direction.

[0011] In one embodiment, the thickness of the fin is between 0.095mm and 0.25mm; along the first direction, the distance between the centers of two adjacent perforations on the same heat dissipation unit is L1, and L1 satisfies: 20mm≤L1≤50mm; along the second direction, the distance between the centers of two adjacent perforations on the heat dissipation unit is L2, and L2 satisfies: 12.7mm≤L2≤50mm.

[0012] In one embodiment, each of the heat dissipation units is constructed with a plurality of heat dissipation ribs. Along the length direction of the heat dissipation unit, a plurality of the heat dissipation ribs are provided on both sides of each of the through holes, and the heat dissipation ribs are arranged along the circumferential direction of the through holes. The heat dissipation ribs protrude from the end face of the heat dissipation unit and are hollowly arranged in an arch shape. Heat dissipation holes are opened on the heat dissipation ribs, and the heat dissipation holes penetrate the heat dissipation ribs. The plurality of heat dissipation ribs are arranged in an X shape.

[0013] In one embodiment, the elliptical heat exchange tube has a major axis X and a minor axis Y, X satisfies 9.72mm≤X≤19.44mm, and Y satisfies 4.58mm≤Y≤12.1mm; the wall thickness of the heat exchange tube is D, D satisfies 0.3mm≤D≤0.5mm, and the maximum outer diameter of the heat exchange tube is R, and R satisfies 5mm≤R≤20mm.

[0014] In one embodiment, the elliptical tube heat exchanger also includes a collecting tube, and there are two collecting tubes, and the two collecting tubes are arranged in parallel and spaced apart; a plurality of the heat exchange tubes are arranged in parallel and spaced apart to form two rows, and the same end of the heat exchange tubes in one row extends into one of the collecting tubes, and the same end of the heat exchange tubes in the other row extends into the other collecting tube.

[0015] An air conditioner comprises the elliptical tube heat exchanger as described above.

[0016] Compared with the prior art, the utility model is provided with an elliptical heat exchange tube, which has good external flow characteristics and is convenient for condensed water discharge. The elliptical tube can make the heat exchanger structure more compact. Under the same flow area, the heat transfer perimeter of the elliptical tube is long, and the heat exchange area is correspondingly increased. The structure also allows for a more compact arrangement, thereby increasing the heat exchange per unit volume, thereby improving the heat exchange efficiency and reducing the energy consumption of the air conditioner. Since the heat exchange tube is structured with a protrusion, the protrusion can enhance the turbulence effect on the refrigerant medium in the heat exchange tube, improve the temperature uniformity of the refrigerant medium, and further improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the fins of one embodiment of the elliptical tube heat exchanger provided by the utility model;

[0018] Figure 2 A cross-sectional view of a heat exchange tube of one embodiment of an elliptical ring heat exchanger provided by the utility model;

[0019] Figure 3 A partial structural schematic diagram of the fins of one embodiment of the elliptical ring heat exchanger provided by the utility model;

[0020] Figure 4 A schematic structural diagram of one embodiment of an elliptical tube heat exchanger provided by the utility model;

[0021] Figure 5 A front view of one embodiment of the elliptical tube heat exchanger provided by the utility model;

[0022] Figure 6 This is a structural schematic diagram of one embodiment of the air conditioner provided by the utility model.

[0023] The symbols in the figure mean the following:

[0024] 100. elliptical tube heat exchanger; 10. fin; 11. perforation; 12. heat dissipation unit; 13. heat dissipation rib; 131. heat dissipation hole; 20. heat exchange tube; 21. protrusion; 30. collecting pipe; 200. air conditioner. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0030] The utility model provides an elliptical tube heat exchanger 100, which is applied to an air-conditioning system 200 and can provide higher heat exchange efficiency than a round tube heat exchanger, thereby reducing the energy consumption of the air-conditioning system 200.

[0031] See also Figure 1-Figure 3The elliptical tube heat exchanger 100 includes a plurality of fins 10 and heat exchange tubes 20. The plurality of fins 10 are evenly spaced, and each fin 10 is provided with a plurality of elliptical perforations 11. The plurality of fins 10 are arranged in parallel in sequence, and the perforations 11 on different fins 10 can overlap along the arrangement direction of the fins 10. There are a plurality of heat exchange tubes 20, and the plurality of heat exchange tubes 20 are respectively passed through the overlapping perforations 11 of each fin 10. The heat exchange tubes 20 are arranged in an elliptical shape, and a protrusion 21 is constructed on the inner wall of the heat exchange tube 20, and the protrusion 21 is protruded from the inner wall of the heat exchange tube 20 toward the axial direction of the heat exchange tube 20. The protrusion 21 extends along the length direction of the heat exchange tube 20. Thus, since the heat exchange tube 20 is elliptical, the external flow characteristics of the elliptical heat exchange tube 20 are good, which is convenient for the discharge of condensed water, and the elliptical tube can make the structure of the heat exchanger more compact. Under the same flow area, the heat transfer perimeter of the elliptical tube is long, and the heat exchange area is correspondingly increased. The structure also allows for a more compact arrangement, thereby increasing the heat exchange per unit volume, thereby improving the heat exchange efficiency and reducing the energy consumption of the air conditioner 200. In addition, since the heat exchange tube 20 is structured with a protrusion 21, the protrusion 21 can enhance the turbulence effect on the refrigerant medium in the heat exchange tube 20, improve the temperature uniformity of the refrigerant medium, and further improve the heat exchange efficiency.

[0032] In this embodiment, the protrusion 21 extends in a spiral shape along the inner wall of the heat exchange tube 20 , that is, the protrusion 21 forms an internal thread structure, which is convenient for processing and has a good disturbance effect.

[0033] In other embodiments, the protrusion 21 may also be configured as a plurality of rectangular block protrusions 21, truncated cone protrusions 21 or spherical protrusions 21, etc., and is not limited to the above-mentioned internal thread structure, as long as it can have a spoiler effect.

[0034] See also Figure 2 In this embodiment, the protrusion 21 can also be set as a protrusion structure with a sawtooth cross section. The protrusion 21 is set at at least one end of the long axis of the inner wall of the heat exchange tube 20 (because the cross-sectional shape of the heat exchange tube 20 is an ellipse, and the ellipse has a long axis and a short axis), and is arranged in sequence along the circumference of the inner wall of the heat exchange tube 20, and the top angle of the protrusion faces the axis of the heat exchange tube 20. In this way, the bottom edge of the protrusion 21 with a sawtooth cross section is connected to the inner wall of the heat exchange tube 20, and the contact area is large, which can ensure its contact strength. The top angle extends radially inward, which can also hinder the flow of the medium, so as to achieve a turbulent effect and make the heat exchange effect of the heat exchange tube 20 more uniform.

[0035] Furthermore, the height H of the sawtooth protrusion 21 is 0.1-0.5 mm, so as to ensure the flow disturbance effect while preventing the height from being too high to affect the flow area of ​​the heat exchange tube 20.

[0036] Exemplarily, the height H of the serrated protrusion 21 is 0.1 mm, 0.2 mm, 0.35 mm, 0.44 mm, etc., and is not limited to the above two endpoint values. The fin 10 includes a plurality of heat dissipation units 12, the heat dissipation units 12 extend along a first direction, and each heat dissipation unit 12 is evenly spaced and provided with a plurality of perforations 11, and the plurality of heat dissipation units 12 are arranged in parallel along a second direction, and the first direction and the second direction are arranged at an angle. In this way, the arrangement of the perforations 11 on the fin 10 is more regular, and the coordination with the heat exchange tube 20 is more reasonable. After the heat exchange tube 20 is passed through the perforations 11, the heat exchange tubes 20 can be prevented from interfering with each other.

[0037] For explanation, see Figure 1 In this embodiment, the first direction refers to the length direction of the fin 10 , and the second direction is perpendicular to the first direction and is the width direction of the fin 10 .

[0038] Furthermore, the perforations 11 on adjacent heat dissipation units 12 are staggered in the second direction, that is, the perforations 11 on one heat dissipation unit 12 are not arranged at a parallel position on its adjacent heat dissipation unit 12, and the perforations 11 on two adjacent heat dissipation units 12 are alternately arranged in pairs, which can make the heat exchange effect more uniform and avoid heat concentration.

[0039] It is understandable that in other embodiments, if the heat exchange tubes 20 need to be arranged on the same plane, the two perforations 11 on adjacent heat dissipation units 12 can also be arranged in parallel or flexibly arranged according to working conditions, and are not limited to the above-mentioned alternating arrangement.

[0040] A plurality of heat dissipation ribs 13 are constructed on each heat dissipation unit 12. Along the length direction of the fin 10, a plurality of heat dissipation ribs 13 are arranged on both sides of each perforation 11, and the heat dissipation ribs 13 are arranged along the circumferential direction of the perforation 11. The heat dissipation ribs 13 protrude from the end surface of the heat dissipation unit 12 and are arranged hollow in an arch shape. Heat dissipation holes 131 are opened on the heat dissipation ribs 13, and the heat dissipation holes 131 penetrate the heat dissipation ribs 13. The plurality of heat dissipation ribs 13 are arranged in an X shape. The heat dissipation holes 131 allow air to pass through, thereby improving the heat exchange efficiency between the fin 10 and the air, and the heat dissipation ribs 13 can have a turbulent effect on the air, so that the air will be retained on the surface of the fin 10 during the flow process, so that the heat exchange effect with the fin 10 is more thorough. The heat dissipation ribs 13 arranged in an X shape efficiently utilize the surface of the heat dissipation unit 12, and the arrangement is integrated and rational, and the turbulent effect is good.

[0041] In this embodiment, four heat dissipation ribs 13 are provided on both sides of each through hole 11. Since the through hole 11 is set to be elliptical, the distance between the two heat dissipation ribs 13 located in the middle of the width direction of the heat dissipation unit 12 and the long axis of the through hole 11 is farther than the distance between the two heat dissipation ribs 13 located on both sides of the width direction of the heat dissipation unit 12 and the long axis of the through hole 11. Because heat is transferred from the heat exchange tube 20 to the fin 10, when the above distances are the same, it means that the heat transferred from the through hole 11 to each heat dissipation rib 13 is the same, so that the heat dissipation effect at each position on the fin 10 is more balanced.

[0042] In this embodiment, the thickness of the fin 10 is between 0.095 mm and 0.25 mm to balance the structural strength and manufacturing cost of the fin 10, to avoid the fin 10 being too thin and having insufficient structural strength, which may be easily bent and damaged, and to prevent the fin 10 from being too thick, which may increase material costs and occupy too much space.

[0043] Exemplarily, the thickness of the fin 10 is 0.105 mm, 0.115 mm, 0.13 mm, 0.15 mm and 0.25 mm, and only needs to be between the above two endpoint values, but is not limited to the above values.

[0044] Preferably, along the first direction, the distance between the centers of two adjacent perforations 11 on the same heat dissipation unit 12 is L1, and L1 satisfies: 20mm≤L1≤50mm. In this way, it can prevent the two heat exchange tubes 20 from being too far apart, wasting space, and failing to achieve sufficient heat exchange efficiency, and also prevent the two heat exchange tubes 20 from being too close to each other and exceeding the upper limit of the heat dissipation capacity of the fins 10, and the refrigerant medium from flowing through the heat exchange area with the fins 10 without sufficient cooling.

[0045] At the same time, along the second direction, the distance between the centers of the two through holes 11 on the adjacent heat dissipation units 12 is L2, and L2 satisfies: 12.7mm≤L2≤50mm. The technical effect of such a setting is similar to the technical effect of the two through holes 11 arranged on the same heat dissipation unit 12, which can prevent the heat exchange tubes 20 from being too close to each other and being unable to dissipate heat in time, and prevent the heat exchange tubes 20 from being too far apart and causing space waste.

[0046] Exemplarily, the values ​​of L1 and L2 are suitable for heat exchangers of different sizes and can provide a variety of combination schemes. After experiments, when the values ​​of L1 and L2 are: 30mm, 26mm; 25mm, 4.22mm; 25.4mm, 15.88mm; 31.75mm, 27.5mm; 25mm, 25mm; 38mm, 33mm; 21mm, 12.7mm; 21mm, 18.2mm; 50mm, 50mm, the heat exchange efficiency reaches the best.

[0047] The elliptical heat exchange tube 20 has a major axis X and a minor axis Y, X satisfies 9.72 mm ≤ X ≤ 19.44 mm, and Y satisfies 4.58 mm ≤ Y ≤ 12.1 mm. In this way, the size range of the heat exchange tube 20 is comprehensively considered to prevent the heat exchange tube 20 from being too thin and unable to achieve sufficient heat exchange effect, and to avoid the heat exchange tube 20 being too thick and increasing the production cost and material cost.

[0048] Similarly, the major axis X and the minor axis Y are adapted to heat exchangers of different sizes and can provide a variety of combination solutions. After experiments, when the values ​​of the major axis X and the minor axis Y are 12.55mm, 8mm; 19.44mm, 12.16mm; 10.65mm, 4.58mm; 10.22mm, 5.22mm, the heat exchange efficiency is higher and the material cost is lower.

[0049] The wall thickness of the heat exchange tube 20 is D, D satisfies 0.3mm≤D≤0.5mm, and the maximum outer diameter of the heat exchange tube 20 is R, R satisfies 5mm≤R≤20mm. In this way, the wall thickness of the heat exchange tube 20 is reasonably specified so that it has sufficient structural strength while not hindering heat transfer to the fin 10. When the wall thickness of the heat exchange tube 20 is between 0.3mm and 0.5mm, the outer diameter of the heat exchange tube 20 is correspondingly set to 5mm-20mm.

[0050] Exemplarily, the wall thickness of the heat exchange tube 20 is set to 0.3 mm, 0.35 mm, and 0.5 mm, and the outer diameter of the heat exchange tube 20 is set to 7 mm, 7.94 mm, 9.52 mm, and 12.7 mm.

[0051] See also Figure 4-Figure 6 The elliptical tube heat exchanger 100 further includes a header 30, which includes two headers 30 and are arranged in parallel and spaced apart; a plurality of heat exchange tubes 20 are arranged in parallel and spaced apart to form two rows, and the same end of the heat exchange tubes 20 in one row extends into one header 30, and the same end of the heat exchange tubes 20 in another row extends into another header 30. In this way, the medium in the header 30 can flow into the plurality of heat exchange tubes 20 at the same time to improve the heat exchange efficiency.

[0052] The utility model also provides an air conditioner 200, comprising the elliptical tube heat exchanger 100 as described above.

[0053] Compared with the prior art, the utility model is provided with an elliptical heat exchange tube 20, which has good external flow characteristics and is convenient for condensed water discharge, and the elliptical tube can make the structure of the heat exchanger more compact. Under the same flow area, the heat transfer perimeter of the elliptical tube is long, and the heat exchange area is correspondingly increased. The structure also allows for a more compact arrangement, thereby increasing the heat exchange per unit volume, thereby improving the heat exchange efficiency and reducing the energy consumption of the air conditioner 200. Since the heat exchange tube 20 is structured with a protrusion 21, the protrusion 21 can improve the turbulence effect on the refrigerant medium in the heat exchange tube 20, improve the temperature uniformity of the refrigerant medium, and further improve the heat exchange efficiency.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An elliptical tube heat exchanger, characterized in that: The elliptical tube heat exchanger comprises: A plurality of fins (10), wherein the plurality of fins (10) are evenly spaced and arranged, and each of the fins (10) is provided with a plurality of elliptical through holes (11); A heat exchange tube (20), wherein the heat exchange tube (20) is in plurality and the plurality of heat exchange tubes (20) are respectively inserted into the overlapping perforations (11) of the fins (10); The heat exchange tube (20) is elliptical in shape, and a protrusion (21) is formed on the inner wall of the heat exchange tube (20). The protrusion (21) is protruded from the inner wall of the heat exchange tube (20) toward the axial direction of the heat exchange tube (20), and the protrusion (21) extends along the length direction of the heat exchange tube (20).

2. The elliptical tube heat exchanger according to claim 1, characterized in that: The protrusion (21) extends in a spiral shape along the length direction of the heat exchange tube (20).

3. The elliptical tube heat exchanger according to claim 1, characterized in that The protrusion (21) is arranged at at least one end of the long axis of the heat exchange tube (20), and the cross section of the protrusion (21) extends along the circumference of the inner wall of the heat exchange tube (20).

4. The elliptical tube heat exchanger according to any one of claims 1 to 3, characterized in that: The cross section of the protrusion (21) is sawtooth-shaped, the vertex angle of the sawtooth is toward the axis of the heat exchange tube (20), and the height H of the sawtooth-shaped protrusion (21) is 0.1-0.5 mm.

5. The elliptical tube heat exchanger according to claim 1, characterized in that: The fin (10) comprises a plurality of heat dissipation units (12), the heat dissipation units (12) extending along a first direction, and each of the heat dissipation units (12) being provided with a plurality of the through holes (11) evenly spaced apart; The plurality of heat dissipation units (12) are arranged in parallel along a second direction, the first direction and the second direction are arranged at an angle, and the through holes (11) on adjacent heat dissipation units (12) are arranged in a staggered manner in the second direction.

6. The elliptical tube heat exchanger according to claim 5, characterized in that: The thickness of the fin (10) is between 0.095 mm and 0.25 mm; along the first direction, the distance between the centers of two adjacent perforations (11) on the same heat dissipation unit (12) is L1, and L1 satisfies: 20 mm ≤ L1 ≤ 50 mm; along the second direction, the distance between the centers of two adjacent perforations (11) on the heat dissipation unit (12) is L2, and L2 satisfies: 12.7 mm ≤ L2 ≤ 50 mm.

7. The elliptical tube heat exchanger according to claim 5, characterized in that: Each of the heat dissipation units (12) is constructed with a plurality of heat dissipation ribs (13). Along the length direction of the heat dissipation unit (12), a plurality of heat dissipation ribs (13) are provided on both sides of each of the through holes (11), and the heat dissipation ribs (13) are arranged along the circumferential direction of the through holes (11). The heat dissipation ribs (13) protrude from the end surface of the heat dissipation unit (12) and are arranged hollow in an arch shape. A heat dissipation hole (131) is provided on the heat dissipation rib (13), and the heat dissipation hole (131) passes through the heat dissipation rib (13). The plurality of heat dissipation ribs (13) are arranged in an X shape.

8. The elliptical tube heat exchanger according to claim 1, characterized in that: The elliptical heat exchange tube (20) has a major axis X and a minor axis Y, X satisfies 9.72 mm ≤ X ≤ 19.44 mm, and Y satisfies 4.58 mm ≤ Y ≤ 12.1 mm; the wall thickness of the heat exchange tube (20) is D, D satisfies 0.3 mm ≤ D ≤ 0.5 mm, and the maximum outer diameter of the heat exchange tube (20) is R, and R satisfies 5 mm ≤ R ≤ 20 mm.

9. The elliptical tube heat exchanger according to claim 1, characterized in that: The elliptical tube heat exchanger further comprises a collecting pipe (30), wherein the collecting pipes (30) are two and the two collecting pipes (30) are arranged in parallel and spaced apart from each other; The plurality of heat exchange tubes (20) are arranged in parallel and spaced apart to form two rows, the same end of the heat exchange tubes (20) in one row extends into one header (30), and the same end of the heat exchange tubes (20) in another row extends into another header (30).

10. An air conditioner, characterized in that: It comprises the elliptical tube heat exchanger as described in any one of claims 1 to 9.

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